%!PS-Adobe-3.0 % Produced by xpdf/pdftops 3.02 %%Creator: mpage 2.5.5 November 2006 %%Title: (mpage) %%LanguageLevel: 2 %%DocumentSuppliedResources: (atend) %%DocumentMedia: plain 612 792 0 () () %%BoundingBox: 0 0 612 792 %%Pages: 80 %%EndComments %%BeginDefaults %%PageMedia: plain %%EndDefaults %%BeginProlog %%BeginResource: procset xpdf 3.02 0 %%Copyright: Copyright 1996-2007 Glyph & Cog, LLC /xpdf 75 dict def xpdf begin % PDF special state /pdfDictSize 15 def /pdfSetup { 3 1 roll 2 array astore /setpagedevice where { pop 3 dict begin /PageSize exch def /ImagingBBox null def /Policies 1 dict dup begin /PageSize 3 def end def { /Duplex true def } if currentdict end setpagedevice } { pop pop } ifelse } def /pdfStartPage { pdfDictSize dict begin /pdfFillCS [] def /pdfFillXform {} def /pdfStrokeCS [] def /pdfStrokeXform {} def /pdfFill [0] def /pdfStroke [0] def /pdfFillOP false def /pdfStrokeOP false def /pdfLastFill false def /pdfLastStroke false def /pdfTextMat [1 0 0 1 0 0] def 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0000000000000000000000000000000000000000000000000000000000000000 0000000000000000000000000000000000000000000000000000000000000000 0000000000000000000000000000000000000000000000000000000000000000 cleartomark %%EndResource /F8_0 /APYGPQ+LucidaSans-Typewriter83 1 1 [ /.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef /.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef /.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef /.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef /space/exclam/quotedbl/numbersign/dollar/percent/ampersand/quoteright /parenleft/parenright/asterisk/plus/comma/hyphen/period/slash /zero/one/two/three/four/five/six/seven /eight/nine/colon/semicolon/less/equal/greater/question /at/A/B/C/D/E/F/G /H/I/J/K/L/M/N/O /P/Q/R/S/T/U/V/W /X/Y/Z/bracketleft/backslash/bracketright/asciicircum/underscore /quoteleft/a/b/c/d/e/f/g /h/i/j/k/l/m/n/o /p/q/r/s/t/u/v/w /x/y/z/braceleft/bar/braceright/asciitilde/bullet 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/egrave/eacute/ecircumflex/edieresis/igrave/iacute/icircumflex/idieresis /eth/ntilde/ograve/oacute/ocircumflex/otilde/odieresis/divide /oslash/ugrave/uacute/ucircumflex/udieresis/yacute/thorn/ydieresis] pdfMakeFont 612 792 false pdfSetup %%EndSetup %%Page: 1 1 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 README Page 1) 144.161 Tj 0 -28.4801 Td (xv6 is a re-implementation of Dennis Ritchie's and Ken Thompson\ 's Unix) 305.796 Tj 0 -37.9735 Td (Version 6 $v6$. xv6 loosely follows the structure and style \ of v6,) 292.6905 Tj 0 -47.4668 Td (but is implemented for a modern x86-based multiprocessor using \ ANSI C.) 305.796 Tj 0 -66.4535 Td (ACKNOWLEDGMENTS) 65.5277 Tj 0 -85.4402 Td (xv6 is inspired by John Lions's Commentary on UNIX 6th Edition \ $Peer) 297.059 Tj 0 -94.9336 Td (to Peer Communications; ISBN: 1-57398-013-7; 1st edition \(June\ 14,) 288.322 Tj 0 -104.4269 Td (2000$\). See also http://pdos.csail.mit.edu/6.828/2007/v6.html\ , which) 297.059 Tj 0 -113.9203 Td (provides pointers to on-line resources for v6.) 200.9517 Tj 0 -132.907 Td (xv6 borrows code from the following sources:) 192.2146 Tj 17.4613 -142.4004 Td (JOS $asm.h, elf.h, mmu.h, bootasm.S, ide.c, console.c, and oth\ ers$) 288.322 Tj 17.4613 -151.8937 Td (Plan 9 $bootother.S, mp.h, mp.c, lapic.c$) 179.1091 Tj 17.4613 -161.3871 Td (FreeBSD $ioapic.c$) 78.6333 Tj 17.4613 -170.8804 Td (NetBSD $console.c$) 78.6333 Tj 0 -189.8667 Td (The following people made contributions:) 174.7406 Tj 17.4613 -199.3601 Td (Russ Cox $context switching, locking$) 161.635 Tj 17.4613 -208.8535 Td (Cliff Frey $MP$) 65.5277 Tj 17.4613 -218.3468 Td (Xiao Yu $MP$) 52.4222 Tj 0 -237.3335 Td (The code in the files that constitute xv6 is) 192.2146 Tj 0 -246.8269 Td (Copyright 2006-2007 Frans Kaashoek, Robert Morris, and Russ Cox\ .) 279.5849 Tj 0 -265.8136 Td (ERROR REPORTS) 56.7907 Tj 0 -284.8003 Td (If you spot errors or have suggestions for improvement, please \ send) 292.6905 Tj 0 -294.2936 Td (email to Frans Kaashoek and Robert Morris $kaashoek,rtm@csail.\ mit.edu$. ) 314.533 Tj 0 -313.2803 Td (BUILDING AND RUNNING XV6) 104.8443 Tj 0 -332.267 Td (To build xv6 on an x86 ELF machine $like Linux or FreeBSD$, r\ un "make".) 310.1645 Tj 0 -341.7604 Td (On non-x86 or non-ELF machines $like OS X, even on x86$, you \ will) 283.9534 Tj 0 -351.2538 Td (need to install a cross-compiler gcc suite capable of producing\ x86 ELF) 310.1645 Tj 0 -360.7471 Td (binaries. See http://pdos.csail.mit.edu/6.828/2007/tools.html.) 275.2164 Tj 0 -370.2405 Td (Then run "make TOOLPREFIX=i386-jos-elf-".) 179.1091 Tj 0 -389.2272 Td (To run xv6, you can use Bochs or QEMU, both PC simulators.) 253.3738 Tj 0 -398.7205 Td (Bochs makes debugging easier, but QEMU is much faster. ) 240.2683 Tj 0 -408.2139 Td (To run in Bochs, run "make bochs" and then type "c" at the boch\ s prompt.) 314.533 Tj 0 -417.7073 Td (To run in QEMU, run "make qemu". Both log the xv6 screen outpu\ t to ) 297.059 Tj 0 -427.2006 Td (standard output.) 69.8962 Tj 0 -446.1873 Td (To create a typeset version of the code, run "make xv6.pdf".) 262.1109 Tj 0 -455.6807 Td (This requires the "mpage" text formatting utility.) 218.4257 Tj 0 -465.174 Td (See http://www.mesa.nl/pub/mpage/.) 148.5295 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 table of contents Page 1) 192.2146 Tj 0 -28.4801 Td (The numbers to the left of the file names in the table are shee\ t numbers.) 318.9016 Tj 0 -37.9735 Td (The source code has been printed in a double column format with\ fifty) 301.4275 Tj 0 -47.4668 Td (lines per column, giving one hundred lines per sheet $or page$\ .) 275.2164 Tj 0 -56.9602 Td (Thus there is a convenient relationship between line numbers an\ d sheet numbers.) 345.1126 Tj 0 -85.4403 Td (# basic headers) 65.5277 Tj -4514.2 TJm (# system calls) 61.1592 Tj -5015.87 TJm (# pipes) 30.5796 Tj 0 -94.9336 Td (01 types.h) 43.6851 Tj -7022.54 TJm (24 traps.h) 43.6851 Tj -7022.54 TJm (51 pipe.c) 39.3166 Tj 0 -104.427 Td (01 param.h) 43.6851 Tj -7022.54 TJm (24 vectors.pl) 56.7907 Tj 0 -113.9204 Td (02 defs.h) 39.3166 Tj -7524.2 TJm (25 trapasm.S) 52.4222 Tj -6019.2 TJm (# string operations) 83.0018 Tj 0 -123.4137 Td (04 x86.h) 34.9481 Tj -8025.87 TJm (25 trap.c) 39.3166 Tj -7524.2 TJm (53 string.c) 48.0537 Tj 0 -132.9071 Td (06 asm.h) 34.9481 Tj -8025.87 TJm (27 syscall.h) 52.4222 Tj 0 -142.4004 Td (06 mmu.h) 34.9481 Tj -8025.87 TJm (27 syscall.c) 52.4222 Tj -6019.2 TJm (# low-level hardware) 87.3703 Tj 0 -151.8938 Td (08 elf.h) 34.9481 Tj -8025.87 TJm (29 sysproc.c) 52.4222 Tj -6019.2 TJm (54 mp.h) 30.5796 Tj 209.536 -161.3872 Td (55 mp.c) 30.5796 Tj 0 -170.8805 Td (# startup) 39.3166 Tj -7524.2 TJm (# file system) 56.7907 Tj -5517.54 TJm (56 lapic.c) 43.6851 Tj 0 -180.3739 Td (09 bootasm.S) 52.4222 Tj -6019.2 TJm (30 buf.h) 34.9481 Tj -8025.87 TJm (58 ioapic.c) 48.0537 Tj 0 -189.8672 Td (10 bootother.S) 61.1592 Tj -5015.87 TJm (30 fcntl.h) 43.6851 Tj -7022.54 TJm (59 picirq.c) 48.0537 Tj 0 -199.3606 Td (11 bootmain.c) 56.7907 Tj -5517.54 TJm (31 stat.h) 39.3166 Tj -7524.2 TJm (61 kbd.h) 34.9481 Tj 0 -208.854 Td (12 main.c) 39.3166 Tj -7524.2 TJm (31 fs.h) 30.5796 Tj -8527.54 TJm (62 kbd.c) 34.9481 Tj 104.768 -218.3473 Td (32 file.h) 39.3166 Tj -7524.2 TJm (63 console.c) 52.4222 Tj 0 -227.8407 Td (# locks) 30.5796 Tj -8527.54 TJm (33 ide.c) 34.9481 Tj -8025.87 TJm (66 timer.c) 43.6851 Tj 0 -237.334 Td (13 spinlock.h) 56.7907 Tj -5517.54 TJm (35 bio.c) 34.9481 Tj 0 -246.8274 Td (13 spinlock.c) 56.7907 Tj -5517.54 TJm (36 fs.c) 30.5796 Tj -8527.54 TJm (# user-level) 52.4222 Tj 104.768 -256.3208 Td (44 file.c) 39.3166 Tj -7524.2 TJm (67 initcode.S) 56.7907 Tj 0 -265.8141 Td (# processes) 48.0537 Tj -6520.87 TJm (45 sysfile.c) 52.4222 Tj -6019.2 TJm (67 usys.S) 39.3166 Tj 0 -275.3075 Td (15 proc.h) 39.3166 Tj -7524.2 TJm (50 exec.c) 39.3166 Tj -7524.2 TJm (68 init.c) 39.3166 Tj 0 -284.8008 Td (16 proc.c) 39.3166 Tj 209.536 -284.8008 Td (68 sh.c) 30.5796 Tj 0 -294.2942 Td (22 swtch.S) 43.6851 Tj 0 -303.7876 Td (22 kalloc.c) 48.0537 Tj 0 -341.7606 Td (The source listing is preceded by a cross-reference that lists \ every defined ) 336.3756 Tj 0 -351.2539 Td (constant, struct, global variable, and function in xv6. Each e\ ntry gives,) 323.2701 Tj 0 -360.7473 Td (on the same line as the name, the line number $or, in a few ca\ ses, numbers$) 327.6386 Tj 0 -370.2406 Td (where the name is defined. Successive lines in an entry list t\ he line) 305.796 Tj 0 -379.734 Td (numbers where the name is used. For example, this entry:) 249.0053 Tj 17.4613 -398.7207 Td (swtch 2208) 43.6851 Tj 34.9226 -408.2141 Td (0318 1928 1967 2207) 83.0018 Tj 34.9226 -417.7074 Td (2208) 17.4741 Tj -0 -436.6941 Td (indicates that swtch is defined on line 2208 and is mentioned o\ n five lines) 327.6386 Tj -0 -446.1875 Td (on sheets 03, 19, and 22.) 109.2129 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 2 2 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 cross-references Page 1) 187.8461 Tj 0 -28.4801 Td (acquire 1373) 52.4222 Tj -12038.8 TJm (bmap 4010) 39.3166 Tj 17.4613 -37.9735 Td (0321 1373 1377 1759) 83.0018 Tj -8527.14 TJm (4010 4036 4119 4169) 83.0018 Tj 17.4613 -47.4664 Td (1917 1975 2018 2033) 83.0018 Tj -8527.14 TJm (4222) 17.4741 Tj 17.4613 -56.9594 Td (2066 2079 2123 2158) 83.0018 Tj -6520.6 TJm (bootmain 1116) 56.7907 Tj 17.4613 -66.4524 Td (2315 2362 2616 2971) 83.0018 Tj -8527.14 TJm (0976 1116) 39.3166 Tj 17.4613 -75.9453 Td (3407 3465 3570 3629) 83.0018 Tj -6520.6 TJm (bootothers 1267) 65.5277 Tj 17.4613 -85.4383 Td (3857 3890 3910 3939) 83.0018 Tj -8527.14 TJm (1207 1234 1267) 61.1592 Tj 17.4613 -94.9313 Td (3954 3964 4425 4441) 83.0018 Tj -6520.6 TJm (BPB 3188) 34.9481 Tj 17.4613 -104.4243 Td (4456 5213 5234 5255) 83.0018 Tj -8527.14 TJm (3188 3191 3712 3714) 83.0018 Tj 17.4613 -113.9172 Td (6360 6516 6558 6606) 83.0018 Tj -8527.14 TJm (3740) 17.4741 Tj 0 -123.4106 Td (allocproc 1754) 61.1592 Tj -11035.5 TJm (bread 3602) 43.6851 Tj 17.4613 -132.9039 Td (1754 1807 1860) 61.1592 Tj -11035.5 TJm (0211 3602 3682 3693) 83.0018 Tj 0 -142.3973 Td (alltraps 2506) 56.7907 Tj -13543.7 TJm (3713 3739 3811 3832) 83.0018 Tj 17.4613 -151.8907 Td (2459 2467 2480 2485) 83.0018 Tj -8527.14 TJm (3917 4026 4068 4119) 83.0018 Tj 17.4613 -161.3836 Td (2505 2506) 39.3166 Tj -13543.8 TJm (4169 4222) 39.3166 Tj 0 -170.877 Td (ALT 6110) 34.9481 Tj -14045.5 TJm (brelse 3624) 48.0537 Tj 17.4613 -180.3703 Td (6110 6138 6140) 61.1592 Tj -11035.5 TJm (0212 3624 3627 3684) 83.0018 Tj 0 -189.8633 Td (argfd 4563) 43.6851 Tj -15048.7 TJm (3696 3719 3723 3746) 83.0018 Tj 17.4613 -199.3567 Td (4563 4606 4621 4633) 83.0018 Tj -8527.14 TJm (3817 3820 3841 3925) 83.0018 Tj 17.4613 -208.8497 Td (4644 4656) 39.3166 Tj -13543.8 TJm (4032 4074 4122 4173) 83.0018 Tj 0 -218.343 Td (argint 2794) 48.0537 Tj -14547 TJm (4233 4237) 39.3166 Tj 17.4613 -227.8364 Td (0339 2794 2808 2824) 83.0018 Tj -6520.6 TJm (BSIZE 3158) 43.6851 Tj 17.4613 -237.3293 Td (2931 2956 2969 4568) 83.0018 Tj -8527.14 TJm (3158 3168 3182 3188) 83.0018 Tj 17.4613 -246.8223 Td (4621 4633 4858 4921) 83.0018 Tj -8527.14 TJm (3694 4119 4120 4121) 83.0018 Tj 17.4613 -256.3153 Td (4922 4957) 39.3166 Tj -13543.8 TJm (4165 4166 4169 4170) 83.0018 Tj 0 -265.8086 Td (argptr 2804) 48.0537 Tj -14547 TJm (4171 4221 4222 4224) 83.0018 Tj 17.4613 -275.302 Td (0340 2804 4621 4633) 83.0018 Tj -6520.6 TJm (buf 3000) 34.9481 Tj 17.4613 -284.795 Td (4656 4982) 39.3166 Tj -13543.8 TJm (0200 0211 0212 0213) 83.0018 Tj 0 -294.2883 Td (argstr 2821) 48.0537 Tj -14547 TJm (0253 3000 3004 3005) 83.0018 Tj 17.4613 -303.7817 Td (0341 2821 4668 4758) 83.0018 Tj -8527.14 TJm (3006 3310 3325 3328) 83.0018 Tj 17.4613 -313.2747 Td (4858 4906 4920 4935) 83.0018 Tj -8527.14 TJm (3375 3404 3454 3456) 83.0018 Tj 17.4613 -322.7676 Td (4957) 17.4741 Tj -16052.1 TJm (3459 3527 3531 3535) 83.0018 Tj 0 -332.2606 Td (BACK 6861) 39.3166 Tj -15550.3 TJm (3541 3553 3565 3568) 83.0018 Tj 17.4613 -341.754 Td (6861 6974 7120 7389) 83.0018 Tj -8527.14 TJm (3601 3604 3614 3624) 83.0018 Tj 0 -351.2473 Td (backcmd 6896 7114) 74.2647 Tj -11537 TJm (3669 3680 3691 3707) 83.0018 Tj 17.4613 -360.7407 Td (6896 6909 6975 7114) 83.0018 Tj -8527.14 TJm (3732 3805 3829 3904) 83.0018 Tj 17.4613 -370.2337 Td (7116 7242 7355 7390) 83.0018 Tj -8527.14 TJm (4013 4057 4105 4155) 83.0018 Tj 0 -379.727 Td (BACKSPACE 6450) 61.1592 Tj -13042 TJm (4215 6328 6339 6342) 83.0018 Tj 17.4613 -389.2204 Td (6450 6467 6526 6532) 83.0018 Tj -8527.14 TJm (6345 6503 6524 6537) 83.0018 Tj 0 -398.7137 Td (balloc 3704) 48.0537 Tj -14547 TJm (6568 6601 6608 6984) 83.0018 Tj 17.4613 -408.2071 Td (3704 3725 4017 4025) 83.0018 Tj -8527.14 TJm (6987 6988 6989 7003) 83.0018 Tj 17.4613 -417.7001 Td (4029) 17.4741 Tj -16052.1 TJm (7015 7016 7019 7020) 83.0018 Tj 0 -427.1934 Td (BBLOCK 3191) 48.0537 Tj -14547 TJm (7021 7025) 39.3166 Tj 17.4613 -436.6868 Td (3191 3713 3739) 61.1592 Tj -9028.94 TJm (bwrite 3614) 48.0537 Tj 0 -446.1801 Td (bfree 3730) 43.6851 Tj -15048.7 TJm (0213 3614 3617 3695) 83.0018 Tj 17.4613 -455.6735 Td (3730 4062 4072 4075) 83.0018 Tj -8527.14 TJm (3718 3745 3816 3840) 83.0018 Tj 0 -465.1669 Td (bget 3566) 39.3166 Tj -15550.3 TJm (4030 4172) 39.3166 Tj 17.4613 -474.6598 Td (3566 3596 3606) 61.1592 Tj -9028.94 TJm (bzero 3689) 43.6851 Tj 0 -484.1532 Td (binit 3539) 43.6851 Tj -15048.7 TJm (3689 3736) 39.3166 Tj 17.4613 -493.6466 Td (0210 1227 3539) 61.1592 Tj -9028.94 TJm (B_BUSY 3009) 48.0537 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 cross-references Page 2) 187.8461 Tj 17.4613 -28.4801 Td (3009 3458 3576 3577) 83.0018 Tj -8527.14 TJm (7394) 17.4741 Tj 17.4613 -37.9735 Td (3588 3591 3616 3626) 83.0018 Tj -6520.6 TJm (CONSOLE 3290) 52.4222 Tj 17.4613 -47.4668 Td (3638) 17.4741 Tj -16052.1 TJm (3290 6621 6622) 61.1592 Tj 0 -56.9602 Td (B_DIRTY 3011) 52.4222 Tj -12038.8 TJm (consoleinit 6616) 69.8962 Tj 17.4613 -66.4535 Td (3011 3387 3416 3421) 83.0018 Tj -8527.14 TJm (0216 1219 6616) 61.1592 Tj 17.4613 -75.9469 Td (3460 3479 3618) 61.1592 Tj -9028.94 TJm (consoleintr 6512) 69.8962 Tj 0 -85.4403 Td (B_VALID 3010) 52.4222 Tj -14045.3 TJm (0218 6298 6512) 61.1592 Tj 17.4613 -94.9336 Td (3010 3420 3460 3479) 83.0018 Tj -6520.6 TJm (consoleread 6551) 69.8962 Tj 17.4613 -104.427 Td (3607) 17.4741 Tj -16052.1 TJm (6551 6622) 39.3166 Tj 0 -113.9203 Td (C 6131 6509) 48.0537 Tj -12540.5 TJm (consolewrite 6601) 74.2647 Tj 17.4613 -123.4137 Td (6131 6179 6204 6205) 83.0018 Tj -8527.14 TJm (6601 6621) 39.3166 Tj 17.4613 -132.9071 Td (6206 6207 6208 6210) 83.0018 Tj -6520.6 TJm (consputc 6487) 56.7907 Tj 17.4613 -142.4004 Td (6509 6519 6522 6529) 83.0018 Tj -8527.14 TJm (6315 6345 6366 6384) 83.0018 Tj 17.4613 -151.8938 Td (6539 6569) 39.3166 Tj -13543.8 TJm (6387 6391 6392 6487) 83.0018 Tj 0 -161.3871 Td (CAPSLOCK 6112) 56.7907 Tj -13543.7 TJm (6526 6532 6538 6608) 83.0018 Tj 17.4613 -170.8805 Td (6112 6145 6286) 61.1592 Tj -9028.94 TJm (context 1518) 52.4222 Tj 0 -180.3739 Td (cgaputc 6455) 52.4222 Tj -14045.3 TJm (0201 0318 1518 1537) 83.0018 Tj 17.4613 -189.8668 Td (6455 6496) 39.3166 Tj -13543.8 TJm (1559 1678 1787 1788) 83.0018 Tj 0 -199.3602 Td (cli 0520) 34.9481 Tj -16052 TJm (1789 1790 1928 1967) 83.0018 Tj 17.4613 -208.8535 Td (0520 0522 0915 1029) 83.0018 Tj -6520.6 TJm (cprintf 1221 6352) 74.2647 Tj 17.4613 -218.3469 Td (1460 6406 6490) 61.1592 Tj -11035.5 TJm (0217 1221 1222 1258) 83.0018 Tj 0 -227.8403 Td (cmd 6865) 34.9481 Tj -16052 TJm (1262 1676 1680 1682) 83.0018 Tj 17.4613 -237.3336 Td (6865 6877 6886 6887) 83.0018 Tj -8527.14 TJm (2286 2375 2637 2653) 83.0018 Tj 17.4613 -246.827 Td (6892 6893 6898 6902) 83.0018 Tj -8527.14 TJm (2658 2882 3410 5619) 83.0018 Tj 17.4613 -256.3203 Td (6906 6915 6918 6923) 83.0018 Tj -8527.14 TJm (5639 5761 5912 6352) 83.0018 Tj 17.4613 -265.8137 Td (6931 6937 6941 6951) 83.0018 Tj -8527.14 TJm (6408 6409 6410 6413) 83.0018 Tj 17.4613 -275.3071 Td (6975 6977 7052 7055) 83.0018 Tj -6520.6 TJm (cpu 1557) 34.9481 Tj 17.4613 -284.8004 Td (7057 7058 7059 7060) 83.0018 Tj -8527.14 TJm (0256 1221 1222 1258) 83.0018 Tj 17.4613 -294.2938 Td (7063 7064 7066 7068) 83.0018 Tj -8527.14 TJm (1260 1262 1271 1306) 83.0018 Tj 17.4613 -303.7871 Td (7069 7070 7071 7072) 83.0018 Tj -8527.14 TJm (1365 1386 1408 1446) 83.0018 Tj 17.4613 -313.2805 Td (7073 7074 7075 7076) 83.0018 Tj -8527.14 TJm (1461 1462 1470 1472) 83.0018 Tj 17.4613 -322.7739 Td (7079 7080 7082 7084) 83.0018 Tj -8527.14 TJm (1557 1567 1571 1582) 83.0018 Tj 17.4613 -332.2672 Td (7085 7086 7087 7088) 83.0018 Tj -8527.14 TJm (1705 1710 1715 1724) 83.0018 Tj 17.4613 -341.7606 Td (7089 7100 7101 7103) 83.0018 Tj -8527.14 TJm (1725 1726 1727 1728) 83.0018 Tj 17.4613 -351.2539 Td (7105 7106 7107 7108) 83.0018 Tj -8527.14 TJm (1729 1928 1959 1966) 83.0018 Tj 17.4613 -360.7473 Td (7109 7110 7113 7114) 83.0018 Tj -8527.14 TJm (1967 1968 2615 2637) 83.0018 Tj 17.4613 -370.2407 Td (7116 7118 7119 7120) 83.0018 Tj -8527.14 TJm (2638 2653 2654 2658) 83.0018 Tj 17.4613 -379.734 Td (7121 7122 7212 7213) 83.0018 Tj -8527.14 TJm (2659 5512 5513 5761) 83.0018 Tj 17.4613 -389.2274 Td (7214 7215 7217 7221) 83.0018 Tj -8527.14 TJm (6408) 17.4741 Tj 17.4613 -398.7207 Td (7224 7230 7231 7234) 83.0018 Tj -6520.6 TJm (cpunum 5751) 48.0537 Tj 17.4613 -408.2141 Td (7237 7239 7242 7246) 83.0018 Tj -8527.14 TJm (0269 1255 1256 1279) 83.0018 Tj 17.4613 -417.7075 Td (7248 7250 7253 7255) 83.0018 Tj -8527.14 TJm (1707 5751 5923 5932) 83.0018 Tj 17.4613 -427.2008 Td (7258 7260 7263 7264) 83.0018 Tj -6520.6 TJm (CR0_PE 0910 1024) 69.8962 Tj 17.4613 -436.6942 Td (7275 7278 7281 7285) 83.0018 Tj -8527.14 TJm (0956 1056) 39.3166 Tj 17.4613 -446.1875 Td (7300 7303 7308 7312) 83.0018 Tj -6520.6 TJm (create 4801) 48.0537 Tj 17.4613 -455.6809 Td (7313 7316 7321 7322) 83.0018 Tj -8527.14 TJm (4801 4821 4834 4838) 83.0018 Tj 17.4613 -465.1743 Td (7328 7337 7338 7344) 83.0018 Tj -8527.14 TJm (4862 4906 4923) 61.1592 Tj 17.4613 -474.6676 Td (7345 7351 7352 7361) 83.0018 Tj -6520.6 TJm (CRTPORT 6451) 52.4222 Tj 17.4613 -484.161 Td (7364 7366 7372 7373) 83.0018 Tj -8527.14 TJm (6451 6460 6461 6462) 83.0018 Tj 17.4613 -493.6543 Td (7378 7384 7390 7391) 83.0018 Tj -8527.14 TJm (6463 6479 6480 6481) 83.0018 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 3 3 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 cross-references Page 3) 187.8461 Tj 17.4613 -28.4801 Td (6482) 17.4741 Tj -14045.6 TJm (exit 2104) 39.3166 Tj 0 -37.9735 Td (CTL 6109) 34.9481 Tj -16052 TJm (0302 2104 2140 2605) 83.0018 Tj 17.4613 -47.4664 Td (6109 6135 6139 6285) 83.0018 Tj -8527.14 TJm (2609 2667 2676 2916) 83.0018 Tj 0 -56.9598 Td (devsw 3283) 43.6851 Tj -15048.7 TJm (6715 6718 6761 6826) 83.0018 Tj 17.4613 -66.4531 Td (3283 3288 4108 4110) 83.0018 Tj -8527.14 TJm (6831 6916 6925 6935) 83.0018 Tj 17.4613 -75.9465 Td (4158 4160 4407 6621) 83.0018 Tj -8527.14 TJm (6980 7028 7035) 61.1592 Tj 17.4613 -85.4399 Td (6622) 17.4741 Tj -14045.6 TJm (fdalloc 4582) 52.4222 Tj 0 -94.9332 Td (dinode 3172) 48.0537 Tj -14547 TJm (4582 4608 4874 4987) 83.0018 Tj 17.4613 -104.4266 Td (3172 3182 3806 3812) 83.0018 Tj -6520.6 TJm (fetchint 2766) 56.7907 Tj 17.4613 -113.9199 Td (3830 3833 3905 3918) 83.0018 Tj -8527.14 TJm (0342 2766 2796 4963) 83.0018 Tj 0 -123.4133 Td (dirent 3203) 48.0537 Tj -12540.5 TJm (fetchstr 2778) 56.7907 Tj 17.4613 -132.9067 Td (3203 4216 4223 4224) 83.0018 Tj -8527.14 TJm (0343 2778 2826 4969) 83.0018 Tj 17.4613 -142.4 Td (4255 4705 4754) 61.1592 Tj -9028.94 TJm (file 3250) 39.3166 Tj 0 -151.8934 Td (dirlink 4252) 52.4222 Tj -14045.3 TJm (0202 0225 0226 0227) 83.0018 Tj 17.4613 -161.3867 Td (0234 4252 4267 4275) 83.0018 Tj -8527.14 TJm (0229 0230 0231 0287) 83.0018 Tj 17.4613 -170.8801 Td (4684 4833 4837 4838) 83.0018 Tj -8527.14 TJm (1540 3250 3671 4404) 83.0018 Tj 0 -180.3735 Td (dirlookup 4212) 61.1592 Tj -13042 TJm (4410 4420 4423 4426) 83.0018 Tj 17.4613 -189.8664 Td (0235 4212 4219 4259) 83.0018 Tj -8527.14 TJm (4438 4439 4452 4454) 83.0018 Tj 17.4613 -199.3598 Td (4374 4770 4811) 61.1592 Tj -11035.5 TJm (4476 4502 4522 4557) 83.0018 Tj 0 -208.8532 Td (DIRSIZ 3201) 48.0537 Tj -14547 TJm (4563 4566 4582 4603) 83.0018 Tj 17.4613 -218.3465 Td (3201 3205 4205 4272) 83.0018 Tj -8527.14 TJm (4617 4629 4642 4653) 83.0018 Tj 17.4613 -227.8399 Td (4328 4329 4391 4665) 83.0018 Tj -8527.14 TJm (4855 4979 5156 5171) 83.0018 Tj 17.4613 -237.3332 Td (4755 4805) 39.3166 Tj -13543.8 TJm (6310 6878 6933 6934) 83.0018 Tj 0 -246.8266 Td (DPL_USER 0711) 56.7907 Tj -13543.7 TJm (7064 7072 7272) 61.1592 Tj 17.4613 -256.32 Td (0711 1724 1725 1817) 83.0018 Tj -6520.6 TJm (filealloc 4421) 61.1592 Tj 17.4613 -265.8133 Td (1818 2572 2666 2675) 83.0018 Tj -8527.14 TJm (0225 4421 4874 5177) 83.0018 Tj 0 -275.3067 Td (E0ESC 6116) 43.6851 Tj -13042.1 TJm (fileclose 4452) 61.1592 Tj 17.4613 -284.8 Td (6116 6270 6274 6275) 83.0018 Tj -8527.14 TJm (0226 2115 4452 4458) 83.0018 Tj 17.4613 -294.2934 Td (6277 6280) 39.3166 Tj -13543.8 TJm (4647 4876 4990 4991) 83.0018 Tj 0 -303.7868 Td (elfhdr 0855) 48.0537 Tj -14547 TJm (5204 5206) 39.3166 Tj 17.4613 -313.2801 Td (0855 1118 1123 5014) 83.0018 Tj -6520.6 TJm (filedup 4439) 52.4222 Tj 0 -322.7735 Td (ELF_MAGIC 0852) 61.1592 Tj -13042 TJm (0227 1880 4439 4443) 83.0018 Tj 17.4613 -332.2664 Td (0852 1129 5028) 61.1592 Tj -11035.5 TJm (4610) 17.4741 Tj 0 -341.7598 Td (ELF_PROG_LOAD 0886) 78.6333 Tj -9028.81 TJm (fileinit 4414) 56.7907 Tj 17.4613 -351.2532 Td (0886 5036 5067) 61.1592 Tj -11035.5 TJm (0228 1228 4414) 61.1592 Tj 0 -360.7465 Td (EOI 5663) 34.9481 Tj -14045.5 TJm (fileread 4502) 56.7907 Tj 17.4613 -370.2399 Td (5663 5734 5775) 61.1592 Tj -11035.5 TJm (0229 4502 4517 4623) 83.0018 Tj 0 -379.7332 Td (ERROR 5681) 43.6851 Tj -13042.1 TJm (filestat 4476) 56.7907 Tj 17.4613 -389.2266 Td (5681 5727) 39.3166 Tj -13543.8 TJm (0230 4476 4658) 61.1592 Tj 0 -398.72 Td (ESR 5666) 34.9481 Tj -14045.5 TJm (filewrite 4522) 61.1592 Tj 17.4613 -408.2133 Td (5666 5730 5731) 61.1592 Tj -11035.5 TJm (0231 4522 4537 4635) 83.0018 Tj 0 -417.7067 Td (EXEC 6857) 39.3166 Tj -13543.8 TJm (FL_IF 0660) 43.6851 Tj 17.4613 -427.2 Td (6857 6922 7059 7365) 83.0018 Tj -8527.14 TJm (0660 1462 1468 1821) 83.0018 Tj 0 -436.6934 Td (exec 5009) 39.3166 Tj -15550.3 TJm (1963 5758) 39.3166 Tj 17.4613 -446.1868 Td (0222 4972 5009 6768) 83.0018 Tj -6520.6 TJm (fork 1854) 39.3166 Tj 17.4613 -455.6801 Td (6829 6830 6926 6927) 83.0018 Tj -8527.14 TJm (0303 1854 2910 6760) 83.0018 Tj 0 -465.1735 Td (execcmd 6869 7053) 74.2647 Tj -11537 TJm (6823 6825 7043 7045) 83.0018 Tj 17.4613 -474.6665 Td (6869 6910 6923 7053) 83.0018 Tj -6520.6 TJm (fork1 7039) 43.6851 Tj 17.4613 -484.1598 Td (7055 7321 7327 7328) 83.0018 Tj -8527.14 TJm (6900 6942 6954 6961) 83.0018 Tj 17.4613 -493.6532 Td (7356 7366) 39.3166 Tj -13543.8 TJm (6976 7024 7039) 61.1592 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 cross-references Page 4) 187.8461 Tj 0 -28.4801 Td (forkret 1984) 52.4222 Tj -14045.3 TJm (3317 3391) 39.3166 Tj 17.4613 -37.9735 Td (1616 1790 1984) 61.1592 Tj -9028.94 TJm (IDE_CMD_WRITE 3318) 78.6333 Tj 0 -47.4664 Td (gatedesc 0801) 56.7907 Tj -13543.7 TJm (3318 3388) 39.3166 Tj 17.4613 -56.9598 Td (0464 0467 0801 2560) 83.0018 Tj -6520.6 TJm (IDE_DF 3314) 48.0537 Tj 0 -66.4531 Td (getcallerpcs 1426) 74.2647 Tj -11537 TJm (3314 3338) 39.3166 Tj 17.4613 -75.9465 Td (0322 1387 1426 1678) 83.0018 Tj -6520.6 TJm (IDE_DRDY 3313) 56.7907 Tj 17.4613 -85.4399 Td (6411) 17.4741 Tj -16052.1 TJm (3313 3336) 39.3166 Tj 0 -94.9332 Td (getcmd 6984) 48.0537 Tj -12540.5 TJm (IDE_ERR 3315) 52.4222 Tj 17.4613 -104.4266 Td (6984 7015) 39.3166 Tj -13543.8 TJm (3315 3338) 39.3166 Tj 0 -113.9199 Td (gettoken 7156) 56.7907 Tj -11537.1 TJm (idtinit 2578) 52.4222 Tj 17.4613 -123.4133 Td (7156 7241 7245 7257) 83.0018 Tj -8527.14 TJm (0351 1259 2578) 61.1592 Tj 17.4613 -132.9067 Td (7270 7271 7307 7311) 83.0018 Tj -6520.6 TJm (idup 3888) 39.3166 Tj 17.4613 -142.4 Td (7333) 17.4741 Tj -16052.1 TJm (0237 1881 3888 4361) 83.0018 Tj 0 -151.8934 Td (growproc 1834) 56.7907 Tj -11537.1 TJm (iget 3853) 39.3166 Tj 17.4613 -161.3867 Td (0304 1834 2959) 61.1592 Tj -11035.5 TJm (3794 3818 3853 3873) 83.0018 Tj 0 -170.8801 Td (havedisk1 3327) 61.1592 Tj -13042 TJm (4234 4359) 39.3166 Tj 17.4613 -180.3735 Td (3327 3364 3462) 61.1592 Tj -9028.94 TJm (iinit 3789) 43.6851 Tj 0 -189.8664 Td (holding 1444) 52.4222 Tj -14045.3 TJm (0238 1229 3789) 61.1592 Tj 17.4613 -199.3598 Td (0323 1376 1404 1444) 83.0018 Tj -6520.6 TJm (ilock 3902) 43.6851 Tj 17.4613 -208.8532 Td (1957) 17.4741 Tj -16052.1 TJm (0239 3902 3908 3928) 83.0018 Tj 0 -218.3465 Td (ialloc 3802) 48.0537 Tj -14547 TJm (4364 4479 4511 4531) 83.0018 Tj 17.4613 -227.8399 Td (0236 3802 3822 4820) 83.0018 Tj -8527.14 TJm (4672 4683 4693 4762) 83.0018 Tj 17.4613 -237.3332 Td (4821) 17.4741 Tj -16052.1 TJm (4774 4809 4813 4823) 83.0018 Tj 0 -246.8266 Td (IBLOCK 3185) 48.0537 Tj -14547 TJm (4867 4937 5023 6563) 83.0018 Tj 17.4613 -256.32 Td (3185 3811 3832 3917) 83.0018 Tj -8527.14 TJm (6583 6610) 39.3166 Tj 0 -265.8133 Td (ICRHI 5674) 43.6851 Tj -13042.1 TJm (inb 0403) 34.9481 Tj 17.4613 -275.3067 Td (5674 5737 5807 5819) 83.0018 Tj -8527.14 TJm (0403 0928 0936 1154) 83.0018 Tj 0 -284.8 Td (ICRLO 5667) 43.6851 Tj -15048.7 TJm (3336 3363 5647 6264) 83.0018 Tj 17.4613 -294.2934 Td (5667 5738 5739 5808) 83.0018 Tj -8527.14 TJm (6267 6461 6463) 61.1592 Tj 17.4613 -303.7868 Td (5810 5820) 39.3166 Tj -11537.3 TJm (initlock 1361) 56.7907 Tj 0 -313.2801 Td (ID 5660) 30.5796 Tj 174.613 -313.2801 Td (0324 1361 1622 2283) 83.0018 Tj 17.461 -322.7735 Td (5660 5693 5766) 61.1592 Tj -11035.5 TJm (2574 3355 3543 3791) 83.0018 Tj -0.0003 -332.2664 Td (ideinit 3351) 52.4222 Tj -14045.3 TJm (4416 5185 6618 6619) 83.0018 Tj 17.461 -341.7598 Td (0251 1230 3351) 61.1592 Tj -9028.94 TJm (inode 3263) 43.6851 Tj -0.0003 -351.2532 Td (ideintr 3402) 52.4222 Tj -14045.3 TJm (0203 0234 0235 0236) 83.0018 Tj 17.461 -360.7465 Td (0252 2624 3402) 61.1592 Tj -11035.5 TJm (0237 0239 0240 0241) 83.0018 Tj -0.0003 -370.2399 Td (idelock 3324) 52.4222 Tj -14045.3 TJm (0242 0243 0245 0246) 83.0018 Tj 17.461 -379.7332 Td (3324 3355 3407 3409) 83.0018 Tj -8527.14 TJm (0247 0248 0249 1541) 83.0018 Tj 17.461 -389.2266 Td (3428 3465 3480 3482) 83.0018 Tj -8527.14 TJm (3256 3263 3284 3285) 83.0018 Tj -0.0003 -398.72 Td (iderw 3454) 43.6851 Tj -15048.7 TJm (3674 3785 3794 3801) 83.0018 Tj 17.461 -408.2133 Td (0253 3454 3459 3461) 83.0018 Tj -8527.14 TJm (3827 3852 3855 3861) 83.0018 Tj 17.461 -417.7067 Td (3608 3619) 39.3166 Tj -13543.8 TJm (3887 3888 3902 3934) 83.0018 Tj -0.0003 -427.2 Td (idestart 3375) 56.7907 Tj -13543.7 TJm (3952 3974 4010 4054) 83.0018 Tj 17.461 -436.6934 Td (3328 3375 3378 3426) 83.0018 Tj -8527.14 TJm (4085 4102 4152 4211) 83.0018 Tj 17.461 -446.1868 Td (3475) 17.4741 Tj -16052.1 TJm (4212 4252 4256 4353) 83.0018 Tj -0.0003 -455.6801 Td (idewait 3332) 52.4222 Tj -14045.3 TJm (4356 4388 4395 4666) 83.0018 Tj 17.461 -465.1735 Td (3332 3358 3380 3416) 83.0018 Tj -8527.14 TJm (4702 4753 4800 4804) 83.0018 Tj -0.0003 -474.6665 Td (IDE_BSY 3312) 52.4222 Tj -14045.3 TJm (4856 4904 4915 4933) 83.0018 Tj 17.461 -484.1598 Td (3312 3336) 39.3166 Tj -13543.8 TJm (5015 6551 6601) 61.1592 Tj -0.0003 -493.6532 Td (IDE_CMD_READ 3317) 74.2647 Tj -9530.47 TJm (INPUT_BUF 6500) 61.1592 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 4 4 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 cross-references Page 5) 187.8461 Tj 17.4613 -28.4801 Td (6500 6503 6524 6536) 83.0018 Tj -8527.14 TJm (2432 2627 6625 6626) 83.0018 Tj 17.4613 -37.9735 Td (6537 6539 6568) 61.1592 Tj -9028.94 TJm (IRQ_SLAVE 5960) 61.1592 Tj 0 -47.4664 Td (insl 0412) 39.3166 Tj -15550.3 TJm (5960 5964 6002 6017) 83.0018 Tj 17.4613 -56.9598 Td (0412 0414 1173 3417) 83.0018 Tj -6520.6 TJm (IRQ_SPURIOUS 2436) 74.2647 Tj 0 -66.4531 Td (INT_DISABLED 5869) 74.2647 Tj -11537 TJm (2436 2636 5707) 61.1592 Tj 17.4613 -75.9465 Td (5869 5917) 39.3166 Tj -11537.3 TJm (IRQ_TIMER 2431) 61.1592 Tj 0 -85.4399 Td (IOAPIC 5858) 48.0537 Tj -14547 TJm (2431 2614 2671 5714) 83.0018 Tj 17.4613 -94.9332 Td (5858 5908) 39.3166 Tj -13543.8 TJm (6680) 17.4741 Tj 0 -104.4266 Td (ioapic 5877) 48.0537 Tj -12540.5 TJm (isdirempty 4702) 65.5277 Tj 17.4613 -113.9199 Td (5607 5629 5630 5874) 83.0018 Tj -8527.14 TJm (4702 4709 4778) 61.1592 Tj 17.4613 -123.4133 Td (5877 5886 5887 5893) 83.0018 Tj -6520.6 TJm (ismp 5514) 39.3166 Tj 17.4613 -132.9067 Td (5894 5908) 39.3166 Tj -13543.8 TJm (0277 1231 5514 5612) 83.0018 Tj 0 -142.4 Td (ioapicenable 5923) 74.2647 Tj -11537 TJm (5905 5925) 39.3166 Tj 17.4613 -151.8934 Td (0256 3357 5923 6626) 83.0018 Tj -6520.6 TJm (itrunc 4054) 48.0537 Tj 0 -161.3867 Td (ioapicid 5516) 56.7907 Tj -13543.7 TJm (3674 3961 4054) 61.1592 Tj 17.4613 -170.8801 Td (0257 5516 5630 5911) 83.0018 Tj -6520.6 TJm (iunlock 3934) 52.4222 Tj 17.4613 -180.3735 Td (5912) 17.4741 Tj -16052.1 TJm (0241 3934 3937 3976) 83.0018 Tj 0 -189.8664 Td (ioapicinit 5901) 65.5277 Tj -12540.3 TJm (4371 4481 4514 4534) 83.0018 Tj 17.4613 -199.3598 Td (0258 1218 5901 5912) 83.0018 Tj -8527.14 TJm (4679 4880 4942 6556) 83.0018 Tj 0 -208.8532 Td (ioapicread 5884) 65.5277 Tj -12540.3 TJm (6605) 17.4741 Tj 17.4613 -218.3465 Td (5884 5909 5910) 61.1592 Tj -9028.94 TJm (iunlockput 3974) 65.5277 Tj 0 -227.8399 Td (ioapicwrite 5891) 69.8962 Tj -12038.7 TJm (0242 3974 4366 4375) 83.0018 Tj 17.4613 -237.3332 Td (5891 5917 5918 5931) 83.0018 Tj -8527.14 TJm (4378 4674 4685 4688) 83.0018 Tj 17.4613 -246.8266 Td (5932) 17.4741 Tj -16052.1 TJm (4696 4766 4771 4779) 83.0018 Tj 0 -256.32 Td (IO_PIC1 5957) 52.4222 Tj -14045.3 TJm (4780 4791 4795 4812) 83.0018 Tj 17.4613 -265.8133 Td (5957 5970 5985 5994) 83.0018 Tj -8527.14 TJm (4816 4840 4869 4877) 83.0018 Tj 17.4613 -275.3067 Td (5997 6002 6012 6026) 83.0018 Tj -8527.14 TJm (4908 4925 4939 5077) 83.0018 Tj 17.4613 -284.8 Td (6027) 17.4741 Tj -16052.1 TJm (5118) 17.4741 Tj 0 -294.2934 Td (IO_PIC2 5958) 52.4222 Tj -12038.8 TJm (iupdate 3827) 52.4222 Tj 17.4613 -303.7868 Td (5958 5971 5986 6015) 83.0018 Tj -8527.14 TJm (0243 3827 3963 4080) 83.0018 Tj 17.4613 -313.2801 Td (6016 6017 6020 6029) 83.0018 Tj -8527.14 TJm (4178 4678 4695 4789) 83.0018 Tj 17.4613 -322.7735 Td (6030) 17.4741 Tj -16052.1 TJm (4794 4827 4831) 61.1592 Tj 0 -332.2664 Td (IO_RTC 5786) 48.0537 Tj -12540.5 TJm (I_BUSY 3277) 48.0537 Tj 17.4613 -341.7598 Td (5786 5799 5800) 61.1592 Tj -11035.5 TJm (3277 3911 3913 3936) 83.0018 Tj 0 -351.2532 Td (IO_TIMER1 6659) 61.1592 Tj -13042 TJm (3940 3957 3959) 61.1592 Tj 17.4613 -360.7465 Td (6659 6668 6678 6679) 83.0018 Tj -6520.6 TJm (I_VALID 3278) 52.4222 Tj 0 -370.2399 Td (IPB 3182) 34.9481 Tj -16052 TJm (3278 3916 3926 3955) 83.0018 Tj 17.4613 -379.7332 Td (3182 3185 3191 3812) 83.0018 Tj -6520.6 TJm (kalloc 2354) 48.0537 Tj 17.4613 -389.2266 Td (3833 3918) 39.3166 Tj -13543.8 TJm (0261 1283 1772 1812) 83.0018 Tj 0 -398.72 Td (iput 3952) 39.3166 Tj -15550.3 TJm (1838 1865 2354 2360) 83.0018 Tj 17.4613 -408.2133 Td (0240 2120 3952 3958) 83.0018 Tj -8527.14 TJm (2375 5058 5179) 61.1592 Tj 17.4613 -417.7067 Td (3977 4260 4382 4471) 83.0018 Tj -6520.6 TJm (KBDATAP 6104) 52.4222 Tj 17.4613 -427.2 Td (4689 4943) 39.3166 Tj -13543.8 TJm (6104 6267) 39.3166 Tj 0 -436.6934 Td (IRQ_COM1 2433) 56.7907 Tj -11537.1 TJm (kbdgetc 6256) 52.4222 Tj 17.4613 -446.1868 Td (2433 2631) 39.3166 Tj -13543.8 TJm (6256 6298) 39.3166 Tj 0 -455.6801 Td (IRQ_ERROR 2435) 61.1592 Tj -11035.5 TJm (kbdintr 6296) 52.4222 Tj 17.4613 -465.1735 Td (2435 5727) 39.3166 Tj -13543.8 TJm (0266 2628 6296) 61.1592 Tj 0 -474.6665 Td (IRQ_IDE 2434) 52.4222 Tj -12038.8 TJm (KBSTATP 6102) 52.4222 Tj 17.4613 -484.1598 Td (2434 2623 3356 3357) 83.0018 Tj -8527.14 TJm (6102 6264) 39.3166 Tj 0 -493.6532 Td (IRQ_KBD 2432) 52.4222 Tj -12038.8 TJm (KBS_DIB 6103) 52.4222 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 cross-references Page 6) 187.8461 Tj 17.4613 -28.4801 Td (6103 6265) 39.3166 Tj -13543.8 TJm (0453 0461 0954 1054) 83.0018 Tj 0 -37.9735 Td (KEY_DEL 6128) 52.4222 Tj -14045.3 TJm (1711) 17.4741 Tj 17.4613 -47.4664 Td (6128 6169 6191 6215) 83.0018 Tj -6520.6 TJm (lidt 0467) 39.3166 Tj 0 -56.9598 Td (KEY_DN 6122) 48.0537 Tj -14547 TJm (0467 0475 2580) 61.1592 Tj 17.4613 -66.4531 Td (6122 6165 6187 6211) 83.0018 Tj -6520.6 TJm (LINT0 5679) 43.6851 Tj 0 -75.9465 Td (KEY_END 6120) 52.4222 Tj -14045.3 TJm (5679 5718) 39.3166 Tj 17.4613 -85.4399 Td (6120 6168 6190 6214) 83.0018 Tj -6520.6 TJm (LINT1 5680) 43.6851 Tj 0 -94.9332 Td (KEY_HOME 6119) 56.7907 Tj -13543.7 TJm (5680 5719) 39.3166 Tj 17.4613 -104.4266 Td (6119 6168 6190 6214) 83.0018 Tj -6520.6 TJm (LIST 6860) 39.3166 Tj 0 -113.9199 Td (KEY_INS 6127) 52.4222 Tj -14045.3 TJm (6860 6940 7107 7383) 83.0018 Tj 17.4613 -123.4133 Td (6127 6169 6191 6215) 83.0018 Tj -6520.6 TJm (listcmd 6890 7101) 74.2647 Tj 0 -132.9067 Td (KEY_LF 6123) 48.0537 Tj -14547 TJm (6890 6911 6941 7101) 83.0018 Tj 17.4613 -142.4 Td (6123 6167 6189 6213) 83.0018 Tj -8527.14 TJm (7103 7246 7357 7384) 83.0018 Tj 0 -151.8934 Td (KEY_PGDN 6126) 56.7907 Tj -11537.1 TJm (loadgs 0514) 48.0537 Tj 17.4613 -161.3867 Td (6126 6166 6188 6212) 83.0018 Tj -8527.14 TJm (0514 1712) 39.3166 Tj 0 -170.8801 Td (KEY_PGUP 6125) 56.7907 Tj -11537.1 TJm (ltr 0479) 34.9481 Tj 17.4613 -180.3735 Td (6125 6166 6188 6212) 83.0018 Tj -8527.14 TJm (0479 0481 1730) 61.1592 Tj 0 -189.8664 Td (KEY_RT 6124) 48.0537 Tj -12540.5 TJm (MAXARGS 6863) 52.4222 Tj 17.4613 -199.3598 Td (6124 6167 6189 6213) 83.0018 Tj -8527.14 TJm (6863 6871 6872 7340) 83.0018 Tj 0 -208.8532 Td (KEY_UP 6121) 48.0537 Tj -12540.5 TJm (MAXFILE 3169) 52.4222 Tj 17.4613 -218.3465 Td (6121 6165 6187 6211) 83.0018 Tj -8527.14 TJm (3169 4165 4166) 61.1592 Tj 0 -227.8399 Td (kfree 2305) 43.6851 Tj -13042.1 TJm (memcmp 5311) 48.0537 Tj 17.4613 -237.3332 Td (0262 1843 1866 2169) 83.0018 Tj -8527.14 TJm (0330 5311 5543 5588) 83.0018 Tj 17.4613 -246.8266 Td (2170 2287 2305 2310) 83.0018 Tj -6520.6 TJm (memmove 5327) 52.4222 Tj 17.4613 -256.32 Td (5107 5117 5202 5223) 83.0018 Tj -8527.14 TJm (0331 1276 1814 1841) 83.0018 Tj 0 -265.8133 Td (kill 2075) 39.3166 Tj -15550.3 TJm (1871 3683 3839 3924) 83.0018 Tj 17.4613 -275.3067 Td (0305 2075 2658 2933) 83.0018 Tj -8527.14 TJm (4121 4171 4329 4331) 83.0018 Tj 17.4613 -284.8 Td (6767) 17.4741 Tj -16052.1 TJm (5088 5327 6474) 61.1592 Tj 0 -294.2934 Td (kinit 2277) 43.6851 Tj -13042.1 TJm (memset 5304) 48.0537 Tj 17.4613 -303.7868 Td (0263 1224 2277) 61.1592 Tj -11035.5 TJm (0332 1789 1813 1816) 83.0018 Tj 0 -313.2801 Td (ksegment 1703) 56.7907 Tj -13543.7 TJm (1842 2313 3694 3814) 83.0018 Tj 17.4613 -322.7735 Td (0309 1216 1257 1703) 83.0018 Tj -8527.14 TJm (4784 4959 5061 5075) 83.0018 Tj 0 -332.2664 Td (KSTACKSIZE 0152) 65.5277 Tj -12540.3 TJm (5304 6476 6987 7058) 83.0018 Tj 17.4613 -341.7598 Td (0152 1283 1284 1729) 83.0018 Tj -8527.14 TJm (7069 7085 7106 7119) 83.0018 Tj 17.4613 -351.2532 Td (1772 1776 1866 2170) 83.0018 Tj -6520.6 TJm (microdelay 5781) 65.5277 Tj 0 -360.7465 Td (lapiceoi 5772) 56.7907 Tj -13543.7 TJm (0274 5781 5809 5811) 83.0018 Tj 17.4613 -370.2399 Td (0271 2621 2625 2629) 83.0018 Tj -8527.14 TJm (5821) 17.4741 Tj 17.4613 -379.7332 Td (2633 2639 5772) 61.1592 Tj -9028.94 TJm (min 3673) 34.9481 Tj 0 -389.2266 Td (lapicinit 5701) 61.1592 Tj -13042 TJm (3673 4120 4170) 61.1592 Tj 17.4613 -398.72 Td (0272 1215 1256 5701) 83.0018 Tj -6520.6 TJm (mp 5402) 30.5796 Tj 0 -408.2133 Td (lapicstartap 5791) 74.2647 Tj -11537 TJm (5402 5507 5536 5542) 83.0018 Tj 17.4613 -417.7067 Td (0273 1286 5791) 61.1592 Tj -11035.5 TJm (5543 5544 5555 5560) 83.0018 Tj 0 -427.2 Td (lapicw 5690) 48.0537 Tj -14547 TJm (5564 5565 5568 5569) 83.0018 Tj 17.4613 -436.6934 Td (5690 5707 5713 5714) 83.0018 Tj -8527.14 TJm (5580 5583 5585 5587) 83.0018 Tj 17.4613 -446.1868 Td (5715 5718 5719 5724) 83.0018 Tj -8527.14 TJm (5594 5604 5610 5643) 83.0018 Tj 17.4613 -455.6801 Td (5727 5730 5731 5734) 83.0018 Tj -6520.6 TJm (mpbcpu 5519) 48.0537 Tj 17.4613 -465.1735 Td (5737 5738 5743 5775) 83.0018 Tj -8527.14 TJm (0278 1215 1255 5519) 83.0018 Tj 17.4613 -474.6668 Td (5807 5808 5810 5819) 83.0018 Tj -6520.6 TJm (MPBUS 5452) 43.6851 Tj 17.4613 -484.1602 Td (5820) 17.4741 Tj -16052.1 TJm (5452 5633) 39.3166 Tj 0 -493.6536 Td (lgdt 0453) 39.3166 Tj -13543.8 TJm (mpconf 5413) 48.0537 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 5 5 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 cross-references Page 7) 187.8461 Tj 17.4613 -28.4801 Td (5413 5579 5582 5587) 83.0018 Tj -8527.14 TJm (4076) 17.4741 Tj 17.4613 -37.9735 Td (5605) 17.4741 Tj -14045.6 TJm (NELEM 0362) 43.6851 Tj 0 -47.4664 Td (mpconfig 5580) 56.7907 Tj -13543.7 TJm (0362 1672 2879 4961) 83.0018 Tj 17.4613 -56.9598 Td (5580 5610) 39.3166 Tj -11537.3 TJm (nextpid 1615) 52.4222 Tj 0 -66.4531 Td (mpinit 5601) 48.0537 Tj -14547 TJm (1615 1768) 39.3166 Tj 17.4613 -75.9465 Td (0279 1214 5601 5619) 83.0018 Tj -6520.6 TJm (NFILE 0155) 43.6851 Tj 17.4613 -85.4399 Td (5620 5639 5640) 61.1592 Tj -11035.5 TJm (0155 4410 4426) 61.1592 Tj 0 -94.9332 Td (MPIOAPIC 5453) 56.7907 Tj -11537.1 TJm (NINDIRECT 3168) 61.1592 Tj 17.4613 -104.4266 Td (5453 5628) 39.3166 Tj -13543.8 TJm (3168 3169 4022 4070) 83.0018 Tj 0 -113.9199 Td (mpioapic 5439) 56.7907 Tj -11537.1 TJm (NINODE 0157) 48.0537 Tj 17.4613 -123.4133 Td (5439 5607 5629 5631) 83.0018 Tj -8527.14 TJm (0157 3785 3861) 61.1592 Tj 0 -132.9067 Td (MPIOINTR 5454) 56.7907 Tj -11537.1 TJm (NO 6106) 30.5796 Tj 17.4613 -142.4 Td (5454 5634) 39.3166 Tj -13543.8 TJm (6106 6152 6155 6157) 83.0018 Tj 0 -151.8934 Td (MPLINTR 5455) 52.4222 Tj -14045.3 TJm (6158 6159 6160 6162) 83.0018 Tj 17.4613 -161.3867 Td (5455 5635) 39.3166 Tj -13543.8 TJm (6174 6177 6179 6180) 83.0018 Tj 0 -170.8801 Td (mpmain 1253) 48.0537 Tj -14547 TJm (6181 6182 6184 6202) 83.0018 Tj 17.4613 -180.3735 Td (1208 1237 1253 1258) 83.0018 Tj -8527.14 TJm (6203 6205 6206 6207) 83.0018 Tj 17.4613 -189.8668 Td (1285) 17.4741 Tj -16052.1 TJm (6208) 17.4741 Tj 0 -199.3602 Td (MPPROC 5451) 48.0537 Tj -12540.5 TJm (NOFILE 0154) 48.0537 Tj 17.4613 -208.8535 Td (5451 5616) 39.3166 Tj -13543.8 TJm (0154 1540 1878 2113) 83.0018 Tj 0 -218.3469 Td (mpproc 5428) 48.0537 Tj -14547 TJm (4570 4586) 39.3166 Tj 17.4613 -227.8403 Td (5428 5606 5617 5626) 83.0018 Tj -6520.6 TJm (NPROC 0150) 43.6851 Tj 0 -237.3336 Td (mpsearch 5556) 56.7907 Tj -13543.7 TJm (0150 1610 1669 1760) 83.0018 Tj 17.4613 -246.827 Td (5556 5585) 39.3166 Tj -13543.8 TJm (1918 2057 2080 2129) 83.0018 Tj 0 -256.3203 Td (mpsearch1 5537) 61.1592 Tj -13042 TJm (2162) 17.4741 Tj 17.4613 -265.8137 Td (5537 5564 5568 5571) 83.0018 Tj -6520.6 TJm (NSEGS 1508) 43.6851 Tj 0 -275.3071 Td (namecmp 4203) 52.4222 Tj -14045.3 TJm (1508 1561) 39.3166 Tj 17.4613 -284.8004 Td (0244 4203 4228 4765) 83.0018 Tj -6520.6 TJm (nulterminate 7352) 74.2647 Tj 0 -294.2938 Td (namei 4389) 43.6851 Tj -15048.7 TJm (7215 7230 7352 7373) 83.0018 Tj 17.4613 -303.7871 Td (0245 1826 4389 4670) 83.0018 Tj -8527.14 TJm (7379 7380 7385 7386) 83.0018 Tj 17.4613 -313.2805 Td (4865 4935 5021) 61.1592 Tj -11035.5 TJm (7391) 17.4741 Tj 0 -322.7739 Td (nameiparent 4396) 69.8962 Tj -10032.1 TJm (NUMLOCK 6113) 52.4222 Tj 17.4613 -332.2668 Td (0246 4354 4369 4381) 83.0018 Tj -8527.14 TJm (6113 6146) 39.3166 Tj 17.4613 -341.7602 Td (4396 4681 4760 4807) 83.0018 Tj -6520.6 TJm (outb 0421) 39.3166 Tj 0 -351.2536 Td (namex 4354) 43.6851 Tj -15048.7 TJm (0421 0933 0941 1164) 83.0018 Tj 17.4613 -360.7469 Td (4354 4392 4398) 61.1592 Tj -11035.5 TJm (1165 1166 1167 1168) 83.0018 Tj 0 -370.2403 Td (NBUF 0156) 39.3166 Tj -15550.3 TJm (1169 3361 3370 3381) 83.0018 Tj 17.4613 -379.7336 Td (0156 3531 3553) 61.1592 Tj -11035.5 TJm (3382 3383 3384 3385) 83.0018 Tj 0 -389.227 Td (NCPU 0153) 39.3166 Tj -15550.3 TJm (3386 3388 3391 5646) 83.0018 Tj 17.4613 -398.7204 Td (0153 1571 5512) 61.1592 Tj -11035.5 TJm (5647 5799 5800 5970) 83.0018 Tj 0 -408.2137 Td (ncpu 5515) 39.3166 Tj -15550.3 TJm (5971 5985 5986 5994) 83.0018 Tj 17.4613 -417.7071 Td (1222 1278 1572 3357) 83.0018 Tj -8527.14 TJm (5997 6002 6012 6015) 83.0018 Tj 17.4613 -427.2004 Td (5515 5618 5619 5623) 83.0018 Tj -8527.14 TJm (6016 6017 6020 6026) 83.0018 Tj 17.4613 -436.6938 Td (5624 5625) 39.3166 Tj -13543.8 TJm (6027 6029 6030 6460) 83.0018 Tj 0 -446.1872 Td (NDEV 0158) 39.3166 Tj -15550.3 TJm (6462 6479 6480 6481) 83.0018 Tj 17.4613 -455.6805 Td (0158 4108 4158 4407) 83.0018 Tj -8527.14 TJm (6482 6677 6678 6679) 83.0018 Tj 0 -465.1739 Td (NDIRECT 3167) 52.4222 Tj -12038.8 TJm (outsl 0433) 43.6851 Tj 17.4613 -474.6668 Td (3167 3169 3178 3274) 83.0018 Tj -8527.14 TJm (0433 0435 3389) 61.1592 Tj 17.4613 -484.1602 Td (4015 4020 4024 4025) 83.0018 Tj -6520.6 TJm (outw 0427) 39.3166 Tj 17.4613 -493.6536 Td (4060 4067 4068 4075) 83.0018 Tj -8527.14 TJm (0427 0982 0984 1082) 83.0018 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 cross-references Page 8) 187.8461 Tj 17.4613 -28.4801 Td (1084) 17.4741 Tj -16052.1 TJm (7201 7225 7240 7244) 83.0018 Tj 0 -37.9735 Td (O_CREATE 3053) 56.7907 Tj -13543.7 TJm (7256 7269 7305 7309) 83.0018 Tj 17.4613 -47.4664 Td (3053 4861 7278 7281) 83.0018 Tj -8527.14 TJm (7324 7332) 39.3166 Tj 0 -56.9598 Td (O_RDONLY 3050) 56.7907 Tj -11537.1 TJm (picenable 5975) 61.1592 Tj 17.4613 -66.4531 Td (3050 4868 7275) 61.1592 Tj -11035.5 TJm (0283 3356 5975 6625) 83.0018 Tj 0 -75.9465 Td (O_RDWR 3052) 48.0537 Tj -14547 TJm (6680) 17.4741 Tj 17.4613 -85.4399 Td (3052 4886 6814 6816) 83.0018 Tj -6520.6 TJm (picinit 5982) 52.4222 Tj 17.4613 -94.9332 Td (7007) 17.4741 Tj -16052.1 TJm (0284 1217 5982) 61.1592 Tj 0 -104.4266 Td (O_WRONLY 3051) 56.7907 Tj -11537.1 TJm (picsetmask 5967) 65.5277 Tj 17.4613 -113.9199 Td (3051 4885 4886 7278) 83.0018 Tj -8527.14 TJm (5967 5977 6033) 61.1592 Tj 17.4613 -123.4133 Td (7281) 17.4741 Tj -14045.6 TJm (pinit 1620) 43.6851 Tj 0 -132.9067 Td (PAGE 0151) 39.3166 Tj -15550.3 TJm (0306 1225 1620) 61.1592 Tj 17.4613 -142.4 Td (0151 0152 1811 2284) 83.0018 Tj -6520.6 TJm (PIPE 6859) 39.3166 Tj 17.4613 -151.8934 Td (2285 2309 2359 5054) 83.0018 Tj -8527.14 TJm (6859 6950 7086 7377) 83.0018 Tj 17.4613 -161.3867 Td (5057 5179 5202 5223) 83.0018 Tj -6520.6 TJm (pipe 5161) 39.3166 Tj 0 -170.8801 Td (panic 6401 7032) 65.5277 Tj -12540.3 TJm (0204 0288 0289 0290) 83.0018 Tj 17.4613 -180.3735 Td (0219 1377 1405 1469) 83.0018 Tj -8527.14 TJm (3255 4469 4509 4529) 83.0018 Tj 17.4613 -189.8668 Td (1471 1958 1960 1962) 83.0018 Tj -8527.14 TJm (5161 5173 5179 5185) 83.0018 Tj 17.4613 -199.3602 Td (1964 2006 2009 2110) 83.0018 Tj -8527.14 TJm (5189 5193 5211 5230) 83.0018 Tj 17.4613 -208.8535 Td (2140 2310 2321 2360) 83.0018 Tj -8527.14 TJm (5251 6763 6952 6953) 83.0018 Tj 17.4613 -218.3469 Td (2655 3378 3459 3461) 83.0018 Tj -6520.6 TJm (pipealloc 5171) 61.1592 Tj 17.4613 -227.8403 Td (3463 3596 3617 3627) 83.0018 Tj -8527.14 TJm (0287 4984 5171) 61.1592 Tj 17.4613 -237.3336 Td (3725 3743 3822 3873) 83.0018 Tj -6520.6 TJm (pipeclose 5211) 61.1592 Tj 17.4613 -246.827 Td (3908 3928 3937 3958) 83.0018 Tj -8527.14 TJm (0288 4469 5211) 61.1592 Tj 17.4613 -256.3203 Td (4036 4219 4267 4275) 83.0018 Tj -6520.6 TJm (pipecmd 6884 7080) 74.2647 Tj 17.4613 -265.8137 Td (4443 4458 4517 4537) 83.0018 Tj -8527.14 TJm (6884 6912 6951 7080) 83.0018 Tj 17.4613 -275.3071 Td (4709 4777 4786 4821) 83.0018 Tj -8527.14 TJm (7082 7258 7358 7378) 83.0018 Tj 17.4613 -284.8004 Td (4834 4838 5620 5640) 83.0018 Tj -6520.6 TJm (piperead 5251) 56.7907 Tj 17.4613 -294.2938 Td (6401 6408 6901 6920) 83.0018 Tj -8527.14 TJm (0289 4509 5251) 61.1592 Tj 17.4613 -303.7871 Td (6953 7032 7045 7228) 83.0018 Tj -6520.6 TJm (PIPESIZE 5159) 56.7907 Tj 17.4613 -313.2805 Td (7272 7306 7310 7336) 83.0018 Tj -8527.14 TJm (5159 5163 5236 5244) 83.0018 Tj 17.4613 -322.7739 Td (7341) 17.4741 Tj -16052.1 TJm (5266) 17.4741 Tj 0 -332.2668 Td (panicked 6317) 56.7907 Tj -11537.1 TJm (pipewrite 5230) 61.1592 Tj 17.4613 -341.7602 Td (6317 6414 6489) 61.1592 Tj -11035.5 TJm (0290 4529 5230) 61.1592 Tj 0 -351.2536 Td (parseblock 7301) 65.5277 Tj -10533.8 TJm (popcli 1466) 48.0537 Tj 17.4613 -360.7469 Td (7301 7306 7325) 61.1592 Tj -11035.5 TJm (0327 1421 1466 1469) 83.0018 Tj 0 -370.2403 Td (parsecmd 7218) 56.7907 Tj -13543.7 TJm (1471 1731) 39.3166 Tj 17.4613 -379.7336 Td (6902 7025 7218) 61.1592 Tj -9028.94 TJm (printint 6325) 56.7907 Tj 0 -389.227 Td (parseexec 7317) 61.1592 Tj -13042 TJm (6325 6374 6378) 61.1592 Tj 17.4613 -398.7204 Td (7214 7255 7317) 61.1592 Tj -9028.94 TJm (proc 1529) 39.3166 Tj 0 -408.2137 Td (parseline 7235) 61.1592 Tj -13042 TJm (0205 0301 0342 0343) 83.0018 Tj 17.4613 -417.7071 Td (7212 7224 7235 7246) 83.0018 Tj -8527.14 TJm (1204 1357 1529 1535) 83.0018 Tj 17.4613 -427.2004 Td (7308) 17.4741 Tj -16052.1 TJm (1568 1583 1605 1610) 83.0018 Tj 0 -436.6938 Td (parsepipe 7251) 61.1592 Tj -13042 TJm (1613 1665 1669 1716) 83.0018 Tj 17.4613 -446.1872 Td (7213 7239 7251 7258) 83.0018 Tj -8527.14 TJm (1724 1725 1729 1753) 83.0018 Tj 0 -455.6805 Td (parseredirs 7264) 69.8962 Tj -12038.7 TJm (1756 1760 1804 1838) 83.0018 Tj 17.4613 -465.1739 Td (7264 7312 7331 7342) 83.0018 Tj -8527.14 TJm (1841 1842 1843 1844) 83.0018 Tj 0 -474.6668 Td (PCINT 5678) 43.6851 Tj -15048.7 TJm (1845 1857 1864 1871) 83.0018 Tj 17.4613 -484.1602 Td (5678 5724) 39.3166 Tj -13543.8 TJm (1872 1873 1879 1880) 83.0018 Tj 0 -493.6536 Td (peek 7201) 39.3166 Tj -15550.3 TJm (1881 1910 1918 1925) 83.0018 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 6 6 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 cross-references Page 9) 187.8461 Tj 17.4613 -28.4801 Td (1928 1932 1961 1967) 83.0018 Tj -8527.14 TJm (5862 5917 5918 5931) 83.0018 Tj 17.4613 -37.9735 Td (1976 2005 2023 2024) 83.0018 Tj -8527.14 TJm (5932) 17.4741 Tj 17.4613 -47.4668 Td (2028 2055 2057 2077) 83.0018 Tj -6520.6 TJm (REG_VER 5861) 52.4222 Tj 17.4613 -56.9602 Td (2080 2106 2109 2114) 83.0018 Tj -8527.14 TJm (5861 5909) 39.3166 Tj 17.4613 -66.4535 Td (2115 2116 2120 2121) 83.0018 Tj -6520.6 TJm (release 1402) 52.4222 Tj 17.4613 -75.9469 Td (2126 2129 2130 2138) 83.0018 Tj -8527.14 TJm (0325 1402 1405 1763) 83.0018 Tj 17.4613 -85.4403 Td (2155 2162 2163 2182) 83.0018 Tj -8527.14 TJm (1769 1934 1978 1987) 83.0018 Tj 17.4613 -94.9336 Td (2188 2554 2604 2606) 83.0018 Tj -8527.14 TJm (2019 2032 2068 2086) 83.0018 Tj 17.4613 -104.427 Td (2608 2651 2658 2659) 83.0018 Tj -8527.14 TJm (2090 2176 2183 2343) 83.0018 Tj 17.4613 -113.9203 Td (2660 2666 2671 2675) 83.0018 Tj -8527.14 TJm (2369 2373 2619 2975) 83.0018 Tj 17.4613 -123.4137 Td (2754 2766 2778 2796) 83.0018 Tj -8527.14 TJm (2980 3409 3428 3482) 83.0018 Tj 17.4613 -132.9071 Td (2810 2812 2826 2878) 83.0018 Tj -8527.14 TJm (3578 3592 3641 3864) 83.0018 Tj 17.4613 -142.4004 Td (2880 2883 2884 2905) 83.0018 Tj -8527.14 TJm (3880 3892 3914 3942) 83.0018 Tj 17.4613 -151.8938 Td (2939 2958 2974 3306) 83.0018 Tj -8527.14 TJm (3960 3969 4429 4433) 83.0018 Tj 17.4613 -161.3871 Td (3667 4361 4555 4570) 83.0018 Tj -8527.14 TJm (4445 4460 4466 5222) 83.0018 Tj 17.4613 -170.8805 Td (4587 4588 4646 4943) 83.0018 Tj -8527.14 TJm (5225 5238 5247 5258) 83.0018 Tj 17.4613 -180.3739 Td (4944 4963 4969 4989) 83.0018 Tj -8527.14 TJm (5269 6398 6547 6562) 83.0018 Tj 17.4613 -189.8672 Td (5003 5104 5107 5108) 83.0018 Tj -8527.14 TJm (6582 6609) 39.3166 Tj 17.4613 -199.3606 Td (5109 5110 5111 5154) 83.0018 Tj -6520.6 TJm (ROOTDEV 0159) 52.4222 Tj 17.4613 -208.8539 Td (5237 5257 5510 5606) 83.0018 Tj -8527.14 TJm (0159 4359) 39.3166 Tj 17.4613 -218.3473 Td (5617 5618 5619 5622) 83.0018 Tj -6520.6 TJm (ROOTINO 3157) 52.4222 Tj 17.4613 -227.8407 Td (6312 6561) 39.3166 Tj -13543.8 TJm (3157 4359) 39.3166 Tj 0 -237.334 Td (procdump 1654) 56.7907 Tj -11537.1 TJm (run 2262) 34.9481 Tj 17.4613 -246.8274 Td (0307 1654 6520) 61.1592 Tj -11035.5 TJm (1661 2262 2263 2269) 83.0018 Tj 0 -256.3207 Td (proghdr 0874) 52.4222 Tj -14045.3 TJm (2307 2316 2317 2319) 83.0018 Tj 17.4613 -265.8141 Td (0874 1119 1133 5016) 83.0018 Tj -8527.14 TJm (2357) 17.4741 Tj 0 -275.3075 Td (pushcli 1455) 52.4222 Tj -12038.8 TJm (runcmd 6906) 48.0537 Tj 17.4613 -284.8008 Td (0326 1375 1455 1723) 83.0018 Tj -8527.14 TJm (6906 6920 6937 6943) 83.0018 Tj 0 -294.2942 Td (readeflags 0485) 65.5277 Tj -12540.3 TJm (6945 6959 6966 6977) 83.0018 Tj 17.4613 -303.7875 Td (0485 1459 1468 1963) 83.0018 Tj -8527.14 TJm (7025) 17.4741 Tj 17.4613 -313.2809 Td (5758) 17.4741 Tj -14045.6 TJm (RUNNING 1526) 52.4222 Tj 0 -322.7743 Td (readi 4102) 43.6851 Tj -15048.7 TJm (1526 1661 1927 1961) 83.0018 Tj 17.4613 -332.2672 Td (0247 4102 4266 4512) 83.0018 Tj -8527.14 TJm (2671) 17.4741 Tj 17.4613 -341.7606 Td (4708 4709 5026 5034) 83.0018 Tj -6520.6 TJm (safestrcpy 5375) 65.5277 Tj 17.4613 -351.2539 Td (5065 5073) 39.3166 Tj -13543.8 TJm (0333 1825 5104 5375) 83.0018 Tj 0 -360.7473 Td (readsb 3678) 48.0537 Tj -12540.5 TJm (sched 1953) 43.6851 Tj 17.4613 -370.2407 Td (3678 3711 3738 3809) 83.0018 Tj -8527.14 TJm (1953 1958 1960 1962) 83.0018 Tj 0 -379.734 Td (readsect 1160) 56.7907 Tj -13543.7 TJm (1964 1977 2025 2139) 83.0018 Tj 17.4613 -389.2274 Td (1160 1195) 39.3166 Tj -11537.3 TJm (scheduler 1908) 61.1592 Tj 0 -398.7207 Td (readseg 1179) 52.4222 Tj -14045.3 TJm (0308 1263 1559 1908) 83.0018 Tj 17.4613 -408.2141 Td (1113 1126 1137 1179) 83.0018 Tj -8527.14 TJm (1928 1967) 39.3166 Tj 0 -417.7075 Td (REDIR 6858) 43.6851 Tj -13042.1 TJm (SCROLLLOCK 6114) 65.5277 Tj 17.4613 -427.2008 Td (6858 6930 7070 7371) 83.0018 Tj -8527.14 TJm (6114 6147) 39.3166 Tj 0 -436.6942 Td (redircmd 6875 7064) 78.6333 Tj -9028.81 TJm (SECTSIZE 1111) 56.7907 Tj 17.4613 -446.1875 Td (6875 6913 6931 7064) 83.0018 Tj -8527.14 TJm (1111 1173 1186 1189) 83.0018 Tj 17.4613 -455.6809 Td (7066 7275 7278 7281) 83.0018 Tj -8527.14 TJm (1194) 17.4741 Tj 17.4613 -465.1743 Td (7359 7372) 39.3166 Tj -11537.3 TJm (SEG 0701) 34.9481 Tj 0 -474.6672 Td (REG_ID 5860) 48.0537 Tj -14547 TJm (0701 1708 1709 1710) 83.0018 Tj 17.4613 -484.1606 Td (5860 5910) 39.3166 Tj -13543.8 TJm (1724 1725) 39.3166 Tj 0 -493.654 Td (REG_TABLE 5862) 61.1592 Tj -11035.5 TJm (SEG16 0706) 43.6851 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 cross-references Page 10) 192.2146 Tj 17.4613 -28.4801 Td (0706 1726) 39.3166 Tj -13543.8 TJm (3665 4085 4476 4553) 83.0018 Tj 0 -37.9735 Td (segdesc 0677) 52.4222 Tj -14045.3 TJm (4654 6803) 39.3166 Tj 17.4613 -47.4664 Td (0450 0453 0677 0701) 83.0018 Tj -6520.6 TJm (stati 4085) 43.6851 Tj 17.4613 -56.9598 Td (0706 1561) 39.3166 Tj -13543.8 TJm (0248 4085 4480) 61.1592 Tj 0 -66.4531 Td (SEG_ASM 0608) 52.4222 Tj -12038.8 TJm (STA_R 0617 0718) 65.5277 Tj 17.4613 -75.9465 Td (0608 0992 0993 1092) 83.0018 Tj -8527.14 TJm (0617 0718 0992 1092) 83.0018 Tj 17.4613 -85.4399 Td (1093) 17.4741 Tj -16052.1 TJm (1708 1724) 39.3166 Tj 0 -94.9332 Td (SEG_KCODE 0907 1021 1502 2500) 126.6869 Tj -3510.47 TJm (STA_W 0616 0717) 65.5277 Tj 17.4613 -104.4266 Td (0961 1061 1502 1708) 83.0018 Tj -8527.14 TJm (0616 0717 0993 1093) 83.0018 Tj 17.4613 -113.9199 Td (2571 2572) 39.3166 Tj -13543.8 TJm (1709 1710 1725) 61.1592 Tj 0 -123.4133 Td (SEG_KCPU 1504 2502) 78.6333 Tj -9028.81 TJm (STA_X 0613 0714) 65.5277 Tj 17.4613 -132.9067 Td (1504 1710 1712 2518) 83.0018 Tj -8527.14 TJm (0613 0714 0992 1092) 83.0018 Tj 0 -142.4 Td (SEG_KDATA 0908 1022 1503 2501) 126.6869 Tj -5517.01 TJm (1708 1724) 39.3166 Tj 17.4613 -151.8934 Td (0966 1066 1503 1709) 83.0018 Tj -6520.6 TJm (sti 0526) 34.9481 Tj 17.4613 -161.3867 Td (1728 2515) 39.3166 Tj -13543.8 TJm (0526 0528 1473 1914) 83.0018 Tj 0 -170.8801 Td (SEG_NULLASM 0604) 69.8962 Tj -10032.1 TJm (stosb 0442) 43.6851 Tj 17.4613 -180.3735 Td (0604 0991 1091) 61.1592 Tj -11035.5 TJm (0442 0444 1139 5306) 83.0018 Tj 0 -189.8664 Td (SEG_TSS 1507) 52.4222 Tj -12038.8 TJm (strlen 5389) 48.0537 Tj 17.4613 -199.3598 Td (1507 1726 1727 1730) 83.0018 Tj -8527.14 TJm (0334 5046 5086 5389) 83.0018 Tj 0 -208.8532 Td (SEG_UCODE 1505) 61.1592 Tj -13042 TJm (7019 7223) 39.3166 Tj 17.4613 -218.3465 Td (1505 1724 1817) 61.1592 Tj -9028.94 TJm (strncmp 5351) 52.4222 Tj 0 -227.8399 Td (SEG_UDATA 1506) 61.1592 Tj -13042 TJm (0335 4205 5351) 61.1592 Tj 17.4613 -237.3332 Td (1506 1725 1818) 61.1592 Tj -9028.94 TJm (strncpy 5361) 52.4222 Tj 0 -246.8266 Td (SETGATE 0821) 52.4222 Tj -14045.3 TJm (0336 4272 5361) 61.1592 Tj 17.4613 -256.32 Td (0821 2571 2572) 61.1592 Tj -9028.94 TJm (STS_IG32 0732) 56.7907 Tj 0 -265.8133 Td (SHIFT 6108) 43.6851 Tj -15048.7 TJm (0732 0827) 39.3166 Tj 17.4613 -275.3067 Td (6108 6136 6137 6285) 83.0018 Tj -6520.6 TJm (STS_T32A 0729) 56.7907 Tj 0 -284.8 Td (skipelem 4315) 56.7907 Tj -13543.7 TJm (0729 1726) 39.3166 Tj 17.4613 -294.2934 Td (4315 4363) 39.3166 Tj -11537.3 TJm (STS_TG32 0733) 56.7907 Tj 0 -303.7868 Td (sleep 2003) 43.6851 Tj -15048.7 TJm (0733 0827) 39.3166 Tj 17.4613 -313.2801 Td (0311 1659 2003 2006) 83.0018 Tj -6520.6 TJm (sum 5525) 34.9481 Tj 17.4613 -322.7735 Td (2009 2188 2978 3480) 83.0018 Tj -8527.14 TJm (5525 5527 5529 5531) 83.0018 Tj 17.4613 -332.2668 Td (3581 3912 5242 5261) 83.0018 Tj -8527.14 TJm (5532 5543 5592) 61.1592 Tj 17.4613 -341.7602 Td (6566 6779) 39.3166 Tj -11537.3 TJm (superblock 3161) 65.5277 Tj 0 -351.2536 Td (spinlock 1301) 56.7907 Tj -13543.7 TJm (3161 3678 3708 3733) 83.0018 Tj 17.4613 -360.7469 Td (0206 0311 0321 0323) 83.0018 Tj -8527.14 TJm (3807) 17.4741 Tj 17.4613 -370.2403 Td (0324 0325 0354 1301) 83.0018 Tj -6520.6 TJm (SVR 5664) 34.9481 Tj 17.4613 -379.7336 Td (1358 1361 1373 1402) 83.0018 Tj -8527.14 TJm (5664 5707) 39.3166 Tj 17.4613 -389.227 Td (1444 1606 1609 2003) 83.0018 Tj -6520.6 TJm (swtch 2208) 43.6851 Tj 17.4613 -398.7204 Td (2260 2268 2557 2562) 83.0018 Tj -8527.14 TJm (0318 1928 1967 2207) 83.0018 Tj 17.4613 -408.2137 Td (3309 3324 3526 3530) 83.0018 Tj -8527.14 TJm (2208) 17.4741 Tj 17.4613 -417.7071 Td (3668 3784 4405 4409) 83.0018 Tj -6520.6 TJm (SYSCALL 6753 6760 6761 6762 6763 67) 152.898 Tj 17.4613 -427.2004 Td (5157 5162 6308 6320) 83.0018 Tj -8527.14 TJm (6760 6761 6762 6763) 83.0018 Tj 17.4613 -436.6938 Td (6502) 17.4741 Tj -16052.1 TJm (6764 6765 6766 6767) 83.0018 Tj 0 -446.1872 Td (start 0914 1028 6707) 87.3703 Tj -10032 TJm (6768 6769 6770 6771) 83.0018 Tj 17.4613 -455.6805 Td (0913 0914 0975 1027) 83.0018 Tj -8527.14 TJm (6772 6773 6774 6775) 83.0018 Tj 17.4613 -465.1739 Td (1028 1075 1076 6706) 83.0018 Tj -8527.14 TJm (6776 6777 6778 6779) 83.0018 Tj 17.4613 -474.6672 Td (6707) 17.4741 Tj -14045.6 TJm (syscall 2874) 52.4222 Tj 0 -484.1606 Td (stat 3104) 39.3166 Tj -15550.3 TJm (0344 2607 2756 2874) 83.0018 Tj 17.4613 -493.654 Td (0207 0230 0248 3104) 83.0018 Tj -6520.6 TJm (SYS_chdir 2716) 61.1592 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 7 7 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 cross-references Page 11) 192.2146 Tj 17.4613 -28.4801 Td (2716 2851) 39.3166 Tj -13543.8 TJm (2841 2863 4851) 61.1592 Tj 0 -37.9735 Td (sys_chdir 4930) 61.1592 Tj -11035.5 TJm (SYS_pipe 2704) 56.7907 Tj 17.4613 -47.4664 Td (2829 2851 4930) 61.1592 Tj -11035.5 TJm (2704 2864) 39.3166 Tj 0 -56.9598 Td (SYS_close 2707) 61.1592 Tj -11035.5 TJm (sys_pipe 4976) 56.7907 Tj 17.4613 -66.4531 Td (2707 2852) 39.3166 Tj -13543.8 TJm (2842 2864 4976) 61.1592 Tj 0 -75.9465 Td (sys_close 4639) 61.1592 Tj -11035.5 TJm (SYS_read 2706) 56.7907 Tj 17.4613 -85.4399 Td (2830 2852 4639) 61.1592 Tj -11035.5 TJm (2706 2865) 39.3166 Tj 0 -94.9332 Td (SYS_dup 2717) 52.4222 Tj -12038.8 TJm (sys_read 4615) 56.7907 Tj 17.4613 -104.4266 Td (2717 2853) 39.3166 Tj -13543.8 TJm (2843 2865 4615) 61.1592 Tj 0 -113.9199 Td (sys_dup 4601) 52.4222 Tj -12038.8 TJm (SYS_sbrk 2719) 56.7907 Tj 17.4613 -123.4133 Td (2831 2853 4601) 61.1592 Tj -11035.5 TJm (2719 2866) 39.3166 Tj 0 -132.9067 Td (SYS_exec 2709) 56.7907 Tj -11537.1 TJm (sys_sbrk 2951) 56.7907 Tj 17.4613 -142.4 Td (2709 2854 6711) 61.1592 Tj -11035.5 TJm (2844 2866 2951) 61.1592 Tj 0 -151.8934 Td (sys_exec 4951) 56.7907 Tj -11537.1 TJm (SYS_sleep 2720) 61.1592 Tj 17.4613 -161.3867 Td (2832 2854 4951) 61.1592 Tj -11035.5 TJm (2720 2867) 39.3166 Tj 0 -170.8801 Td (SYS_exit 2702) 56.7907 Tj -11537.1 TJm (sys_sleep 2965) 61.1592 Tj 17.4613 -180.3735 Td (2702 2855 6716) 61.1592 Tj -11035.5 TJm (2845 2867 2965) 61.1592 Tj 0 -189.8664 Td (sys_exit 2914) 56.7907 Tj -11537.1 TJm (SYS_unlink 2712) 65.5277 Tj 17.4613 -199.3598 Td (2833 2855 2914) 61.1592 Tj -11035.5 TJm (2712 2868) 39.3166 Tj 0 -208.8532 Td (SYS_fork 2701) 56.7907 Tj -11537.1 TJm (sys_unlink 4751) 65.5277 Tj 17.4613 -218.3465 Td (2701 2856) 39.3166 Tj -13543.8 TJm (2846 2868 4751) 61.1592 Tj 0 -227.8399 Td (sys_fork 2908) 56.7907 Tj -11537.1 TJm (SYS_wait 2703) 56.7907 Tj 17.4613 -237.3332 Td (2834 2856 2908) 61.1592 Tj -11035.5 TJm (2703 2869) 39.3166 Tj 0 -246.8266 Td (SYS_fstat 2713) 61.1592 Tj -11035.5 TJm (sys_wait 2921) 56.7907 Tj 17.4613 -256.32 Td (2713 2857) 39.3166 Tj -13543.8 TJm (2847 2869 2921) 61.1592 Tj 0 -265.8133 Td (sys_fstat 4651) 61.1592 Tj -11035.5 TJm (SYS_write 2705) 61.1592 Tj 17.4613 -275.3067 Td (2835 2857 4651) 61.1592 Tj -11035.5 TJm (2705 2870) 39.3166 Tj 0 -284.8 Td (SYS_getpid 2718) 65.5277 Tj -10533.8 TJm (sys_write 4627) 61.1592 Tj 17.4613 -294.2934 Td (2718 2858) 39.3166 Tj -13543.8 TJm (2848 2870 4627) 61.1592 Tj 0 -303.7868 Td (sys_getpid 2937) 65.5277 Tj -10533.8 TJm (taskstate 0751) 61.1592 Tj 17.4613 -313.2801 Td (2836 2858 2937) 61.1592 Tj -11035.5 TJm (0751 1560) 39.3166 Tj 0 -322.7735 Td (SYS_kill 2708) 56.7907 Tj -11537.1 TJm (TDCR 5685) 39.3166 Tj 17.4613 -332.2664 Td (2708 2859) 39.3166 Tj -13543.8 TJm (5685 5713) 39.3166 Tj 0 -341.7598 Td (sys_kill 2927) 56.7907 Tj -11537.1 TJm (ticks 2563) 43.6851 Tj 17.4613 -351.2532 Td (2837 2859 2927) 61.1592 Tj -11035.5 TJm (0352 2563 2617 2618) 83.0018 Tj 0 -360.7465 Td (SYS_link 2714) 56.7907 Tj -13543.7 TJm (2972 2973 2978) 61.1592 Tj 17.4613 -370.2399 Td (2714 2860) 39.3166 Tj -11537.3 TJm (tickslock 2562) 61.1592 Tj 0 -379.7332 Td (sys_link 4663) 56.7907 Tj -13543.7 TJm (0354 2562 2574 2616) 83.0018 Tj 17.4613 -389.2266 Td (2838 2860 4663) 61.1592 Tj -11035.5 TJm (2619 2971 2975 2978) 83.0018 Tj 0 -398.72 Td (SYS_mkdir 2715) 61.1592 Tj -13042 TJm (2980) 17.4741 Tj 17.4613 -408.2133 Td (2715 2861) 39.3166 Tj -11537.3 TJm (TICR 5683) 39.3166 Tj 0 -417.7067 Td (sys_mkdir 4901) 61.1592 Tj -13042 TJm (5683 5715) 39.3166 Tj 17.4613 -427.2 Td (2839 2861 4901) 61.1592 Tj -9028.94 TJm (TIMER 5675) 43.6851 Tj 0 -436.6934 Td (SYS_mknod 2711) 61.1592 Tj -13042 TJm (5675 5714) 39.3166 Tj 17.4613 -446.1868 Td (2711 2862) 39.3166 Tj -11537.3 TJm (timerinit 6674) 61.1592 Tj 0 -455.6801 Td (sys_mknod 4913) 61.1592 Tj -13042 TJm (0347 1232 6674) 61.1592 Tj 17.4613 -465.1735 Td (2840 2862 4913) 61.1592 Tj -9028.94 TJm (TIMER_16BIT 6671) 69.8962 Tj 0 -474.6665 Td (SYS_open 2710) 56.7907 Tj -13543.7 TJm (6671 6677) 39.3166 Tj 17.4613 -484.1598 Td (2710 2863) 39.3166 Tj -11537.3 TJm (TIMER_DIV 6666) 61.1592 Tj 0 -493.6532 Td (sys_open 4851) 56.7907 Tj -13543.7 TJm (6666 6678 6679) 61.1592 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 cross-references Page 12) 192.2146 Tj 0 -28.4801 Td (TIMER_FREQ 6665) 65.5277 Tj -12540.3 TJm (5931 5997 6016) 61.1592 Tj 17.4613 -37.9735 Td (6665 6666) 39.3166 Tj -11537.3 TJm (T_SYSCALL 2426) 61.1592 Tj 0 -47.4664 Td (TIMER_MODE 6668) 65.5277 Tj -12540.3 TJm (2426 2572 2603 6712) 83.0018 Tj 17.4613 -56.9598 Td (6668 6677) 39.3166 Tj -13543.8 TJm (6717 6757) 39.3166 Tj 0 -66.4531 Td (TIMER_RATEGEN 6670) 78.6333 Tj -9028.81 TJm (usegment 1721) 56.7907 Tj 17.4613 -75.9465 Td (6670 6677) 39.3166 Tj -13543.8 TJm (0310 1721 1846 1926) 83.0018 Tj 0 -85.4399 Td (TIMER_SEL0 6669) 65.5277 Tj -12540.3 TJm (5112) 17.4741 Tj 17.4613 -94.9332 Td (6669 6677) 39.3166 Tj -11537.3 TJm (userinit 1802) 56.7907 Tj 0 -104.4266 Td (TPR 5662) 34.9481 Tj -16052 TJm (0312 1233 1802) 61.1592 Tj 17.4613 -113.9199 Td (5662 5743) 39.3166 Tj -11537.3 TJm (VER 5661) 34.9481 Tj 0 -123.4133 Td (trap 2601) 39.3166 Tj -15550.3 TJm (5661 5723) 39.3166 Tj 17.4613 -132.9067 Td (2452 2454 2524 2601) 83.0018 Tj -6520.6 TJm (wait 2153) 39.3166 Tj 17.4613 -142.4 Td (2653 2655 2658) 61.1592 Tj -11035.5 TJm (0313 2153 2923 6762) 83.0018 Tj 0 -151.8934 Td (trapframe 0552) 61.1592 Tj -13042 TJm (6833 6944 6970 6971) 83.0018 Tj 17.4613 -161.3867 Td (0552 1536 1780 2601) 83.0018 Tj -8527.14 TJm (7026) 17.4741 Tj 0 -170.8801 Td (trapret 2529) 52.4222 Tj -12038.8 TJm (waitdisk 1151) 56.7907 Tj 17.4613 -180.3735 Td (1617 1785 2528 2529) 83.0018 Tj -8527.14 TJm (1151 1163 1172) 61.1592 Tj 0 -189.8664 Td (tvinit 2566) 48.0537 Tj -12540.5 TJm (wakeup 2064) 48.0537 Tj 17.4613 -199.3598 Td (0353 1226 2566) 61.1592 Tj -11035.5 TJm (0314 2064 2618 3422) 83.0018 Tj 0 -208.8532 Td (T_DEV 3102) 43.6851 Tj -15048.7 TJm (3639 3941 3966 5216) 83.0018 Tj 17.4613 -218.3465 Td (3102 4107 4157 4923) 83.0018 Tj -8527.14 TJm (5219 5241 5246 5268) 83.0018 Tj 0 -227.8399 Td (T_DIR 3100) 43.6851 Tj -15048.7 TJm (6541) 17.4741 Tj 17.4613 -237.3332 Td (3100 4218 4365 4673) 83.0018 Tj -6520.6 TJm (wakeup1 2053) 52.4222 Tj 17.4613 -246.8266 Td (4778 4787 4829 4868) 83.0018 Tj -8527.14 TJm (2053 2067 2126 2133) 83.0018 Tj 17.4613 -256.32 Td (4906 4938) 39.3166 Tj -11537.3 TJm (writei 4152) 48.0537 Tj 0 -265.8133 Td (T_FILE 3101) 48.0537 Tj -14547 TJm (0249 4152 4274 4532) 83.0018 Tj 17.4613 -275.3067 Td (3101 4814 4862) 61.1592 Tj -11035.5 TJm (4785 4786) 39.3166 Tj 0 -284.8 Td (T_IRQ0 2429) 48.0537 Tj -12540.5 TJm (xchg 0501) 39.3166 Tj 17.4613 -294.2934 Td (2429 2614 2623 2627) 83.0018 Tj -8527.14 TJm (0501 1260 1382 1419) 83.0018 Tj 17.4613 -303.7868 Td (2631 2635 2636 2671) 83.0018 Tj -6520.6 TJm (yield 1973) 43.6851 Tj 17.4613 -313.2801 Td (5707 5714 5727 5917) 83.0018 Tj -8527.14 TJm (0315 1973 2672) 61.1592 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 8 8 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/types.h Page 1) 166.0035 Tj 0 -28.4801 Td (0100 typedef unsigned int uint;) 144.161 Tj 0 -37.9735 Td (0101 typedef unsigned short ushort;) 152.898 Tj 0 -47.4668 Td (0102 typedef unsigned char uchar;) 148.5295 Tj 0 -56.9602 Td (0103 ) 21.8426 Tj 0 -66.4535 Td (0104 ) 21.8426 Tj 0 -75.9469 Td (0105 ) 21.8426 Tj 0 -85.4403 Td (0106 ) 21.8426 Tj 0 -94.9336 Td (0107 ) 21.8426 Tj 0 -104.427 Td (0108 ) 21.8426 Tj 0 -113.9203 Td (0109 ) 21.8426 Tj 0 -123.4137 Td (0110 ) 21.8426 Tj 0 -132.9071 Td (0111 ) 21.8426 Tj 0 -142.4004 Td (0112 ) 21.8426 Tj 0 -151.8938 Td (0113 ) 21.8426 Tj 0 -161.3871 Td (0114 ) 21.8426 Tj 0 -170.8805 Td (0115 ) 21.8426 Tj 0 -180.3739 Td (0116 ) 21.8426 Tj 0 -189.8672 Td (0117 ) 21.8426 Tj 0 -199.3606 Td (0118 ) 21.8426 Tj 0 -208.8539 Td (0119 ) 21.8426 Tj 0 -218.3473 Td (0120 ) 21.8426 Tj 0 -227.8407 Td (0121 ) 21.8426 Tj 0 -237.334 Td (0122 ) 21.8426 Tj 0 -246.8274 Td (0123 ) 21.8426 Tj 0 -256.3207 Td (0124 ) 21.8426 Tj 0 -265.8141 Td (0125 ) 21.8426 Tj 0 -275.3075 Td (0126 ) 21.8426 Tj 0 -284.8008 Td (0127 ) 21.8426 Tj 0 -294.2942 Td (0128 ) 21.8426 Tj 0 -303.7875 Td (0129 ) 21.8426 Tj 0 -313.2809 Td (0130 ) 21.8426 Tj 0 -322.7743 Td (0131 ) 21.8426 Tj 0 -332.2676 Td (0132 ) 21.8426 Tj 0 -341.761 Td (0133 ) 21.8426 Tj 0 -351.2543 Td (0134 ) 21.8426 Tj 0 -360.7477 Td (0135 ) 21.8426 Tj 0 -370.2411 Td (0136 ) 21.8426 Tj 0 -379.7344 Td (0137 ) 21.8426 Tj 0 -389.2278 Td (0138 ) 21.8426 Tj 0 -398.7211 Td (0139 ) 21.8426 Tj 0 -408.2145 Td (0140 ) 21.8426 Tj 0 -417.7079 Td (0141 ) 21.8426 Tj 0 -427.2012 Td (0142 ) 21.8426 Tj 0 -436.6946 Td (0143 ) 21.8426 Tj 0 -446.1879 Td (0144 ) 21.8426 Tj 0 -455.6813 Td (0145 ) 21.8426 Tj 0 -465.1747 Td (0146 ) 21.8426 Tj 0 -474.668 Td (0147 ) 21.8426 Tj 0 -484.1614 Td (0148 ) 21.8426 Tj 0 -493.6547 Td (0149 ) 21.8426 Tj 0 -522.1348 Td (Sheet 01) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/param.h Page 1) 166.0035 Tj 0 -28.4801 Td (0150 #define NPROC 64 // maximum number of processes) 262.1109 Tj 0 -37.9735 Td (0151 #define PAGE 4096 // granularity of user-space memo\ ry allocation) 332.0071 Tj 0 -47.4668 Td (0152 #define KSTACKSIZE PAGE // size of per-process kernel sta\ ck) 283.9534 Tj 0 -56.9602 Td (0153 #define NCPU 8 // maximum number of CPUs) 240.2683 Tj 0 -66.4535 Td (0154 #define NOFILE 16 // open files per process) 240.2683 Tj 0 -75.9469 Td (0155 #define NFILE 100 // open files per system) 235.8998 Tj 0 -85.4403 Td (0156 #define NBUF 10 // size of disk block cache) 249.0053 Tj 0 -94.9336 Td (0157 #define NINODE 50 // maximum number of active i-nod\ es) 283.9534 Tj 0 -104.427 Td (0158 #define NDEV 10 // maximum major device number) 262.1109 Tj 0 -113.9203 Td (0159 #define ROOTDEV 1 // device number of file system r\ oot disk) 310.1645 Tj 0 -123.4137 Td (0160 ) 21.8426 Tj 0 -132.9071 Td (0161 ) 21.8426 Tj 0 -142.4004 Td (0162 ) 21.8426 Tj 0 -151.8938 Td (0163 ) 21.8426 Tj 0 -161.3871 Td (0164 ) 21.8426 Tj 0 -170.8805 Td (0165 ) 21.8426 Tj 0 -180.3739 Td (0166 ) 21.8426 Tj 0 -189.8672 Td (0167 ) 21.8426 Tj 0 -199.3606 Td (0168 ) 21.8426 Tj 0 -208.8539 Td (0169 ) 21.8426 Tj 0 -218.3473 Td (0170 ) 21.8426 Tj 0 -227.8407 Td (0171 ) 21.8426 Tj 0 -237.334 Td (0172 ) 21.8426 Tj 0 -246.8274 Td (0173 ) 21.8426 Tj 0 -256.3207 Td (0174 ) 21.8426 Tj 0 -265.8141 Td (0175 ) 21.8426 Tj 0 -275.3075 Td (0176 ) 21.8426 Tj 0 -284.8008 Td (0177 ) 21.8426 Tj 0 -294.2942 Td (0178 ) 21.8426 Tj 0 -303.7875 Td (0179 ) 21.8426 Tj 0 -313.2809 Td (0180 ) 21.8426 Tj 0 -322.7743 Td (0181 ) 21.8426 Tj 0 -332.2676 Td (0182 ) 21.8426 Tj 0 -341.761 Td (0183 ) 21.8426 Tj 0 -351.2543 Td (0184 ) 21.8426 Tj 0 -360.7477 Td (0185 ) 21.8426 Tj 0 -370.2411 Td (0186 ) 21.8426 Tj 0 -379.7344 Td (0187 ) 21.8426 Tj 0 -389.2278 Td (0188 ) 21.8426 Tj 0 -398.7211 Td (0189 ) 21.8426 Tj 0 -408.2145 Td (0190 ) 21.8426 Tj 0 -417.7079 Td (0191 ) 21.8426 Tj 0 -427.2012 Td (0192 ) 21.8426 Tj 0 -436.6946 Td (0193 ) 21.8426 Tj 0 -446.1879 Td (0194 ) 21.8426 Tj 0 -455.6813 Td (0195 ) 21.8426 Tj 0 -465.1747 Td (0196 ) 21.8426 Tj 0 -474.668 Td (0197 ) 21.8426 Tj 0 -484.1614 Td (0198 ) 21.8426 Tj 0 -493.6547 Td (0199 ) 21.8426 Tj 0 -522.1348 Td (Sheet 01) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 9 9 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/defs.h Page 1) 161.635 Tj 0 -28.4801 Td (0200 struct buf;) 69.8962 Tj 0 -37.9735 Td (0201 struct context;) 87.3703 Tj 0 -47.4668 Td (0202 struct file;) 74.2647 Tj 0 -56.9602 Td (0203 struct inode;) 78.6333 Tj 0 -66.4535 Td (0204 struct pipe;) 74.2647 Tj 0 -75.9469 Td (0205 struct proc;) 74.2647 Tj 0 -85.4403 Td (0206 struct spinlock;) 91.7388 Tj 0 -94.9336 Td (0207 struct stat;) 74.2647 Tj 0 -104.427 Td (0208 ) 21.8426 Tj 0 -113.9203 Td (0209 // bio.c) 56.7907 Tj 0 -123.4137 Td (0210 void binit$void$;) 144.161 Tj 0 -132.9071 Td (0211 struct buf* bread$uint, uint$;) 170.3721 Tj 0 -142.4004 Td (0212 void brelse$struct buf*$;) 179.1091 Tj 0 -151.8938 Td (0213 void bwrite$struct buf*$;) 179.1091 Tj 0 -161.3871 Td (0214 ) 21.8426 Tj 0 -170.8805 Td (0215 // console.c) 74.2647 Tj 0 -180.3739 Td (0216 void consoleinit$void$;) 170.3721 Tj 0 -189.8672 Td (0217 void cprintf$char*, ...$;) 179.1091 Tj 0 -199.3606 Td (0218 void consoleintr$int\(*$$void$\);) 205.3202 Tj 0 -208.8539 Td (0219 void panic$char*$ __attribute__$\(noreturn$\ \);) 262.1109 Tj 0 -218.3473 Td (0220 ) 21.8426 Tj 0 -227.8407 Td (0221 // exec.c) 61.1592 Tj 0 -237.334 Td (0222 int exec$char*, char**$;) 179.1091 Tj 0 -246.8274 Td (0223 ) 21.8426 Tj 0 -256.3207 Td (0224 // file.c) 61.1592 Tj 0 -265.8141 Td (0225 struct file* filealloc$void$;) 161.635 Tj 0 -275.3075 Td (0226 void fileclose$struct file*$;) 196.5831 Tj 0 -284.8008 Td (0227 struct file* filedup$struct file*$;) 187.8461 Tj 0 -294.2942 Td (0228 void fileinit$void$;) 157.2665 Tj 0 -303.7875 Td (0229 int fileread$struct file*, char*, int n$;) 253.3738 Tj 0 -313.2809 Td (0230 int filestat$struct file*, struct stat*$;) 253.3738 Tj 0 -322.7743 Td (0231 int filewrite$struct file*, char*, int n$;) 257.7424 Tj 0 -332.2676 Td (0232 ) 21.8426 Tj 0 -341.761 Td (0233 // fs.c) 52.4222 Tj 0 -351.2543 Td (0234 int dirlink$struct inode*, char*, uint$;) 249.0053 Tj 0 -360.7477 Td (0235 struct inode* dirlookup$struct inode*, char*, uint*$;) 262.1109 Tj 0 -370.2411 Td (0236 struct inode* ialloc$uint, short$;) 179.1091 Tj 0 -379.7344 Td (0237 struct inode* idup$struct inode*$;) 179.1091 Tj 0 -389.2278 Td (0238 void iinit$void$;) 144.161 Tj 0 -398.7211 Td (0239 void ilock$struct inode*$;) 183.4776 Tj 0 -408.2145 Td (0240 void iput$struct inode*$;) 179.1091 Tj 0 -417.7079 Td (0241 void iunlock$struct inode*$;) 192.2146 Tj 0 -427.2012 Td (0242 void iunlockput$struct inode*$;) 205.3202 Tj 0 -436.6946 Td (0243 void iupdate$struct inode*$;) 192.2146 Tj 0 -446.1879 Td (0244 int namecmp$const char*, const char*$;) 240.2683 Tj 0 -455.6813 Td (0245 struct inode* namei$char*$;) 148.5295 Tj 0 -465.1747 Td (0246 struct inode* nameiparent$char*, char*$;) 205.3202 Tj 0 -474.668 Td (0247 int readi$struct inode*, char*, uint, uint$;) 266.4794 Tj 0 -484.1614 Td (0248 void stati$struct inode*, struct stat*$;) 244.6368 Tj 0 -493.6547 Td (0249 int writei$struct inode*, char*, uint, uint$\ ;) 270.8479 Tj 0 -522.1348 Td (Sheet 02) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/defs.h Page 2) 161.635 Tj 0 -28.4801 Td (0250 // ide.c) 56.7907 Tj 0 -37.9735 Td (0251 void ideinit$void$;) 152.898 Tj 0 -47.4668 Td (0252 void ideintr$void$;) 152.898 Tj 0 -56.9602 Td (0253 void iderw$struct buf*$;) 174.7406 Tj 0 -66.4535 Td (0254 ) 21.8426 Tj 0 -75.9469 Td (0255 // ioapic.c) 69.8962 Tj 0 -85.4403 Td (0256 void ioapicenable$int irq, int cpu$;) 227.1628 Tj 0 -94.9336 Td (0257 extern uchar ioapicid;) 131.0554 Tj 0 -104.427 Td (0258 void ioapicinit$void$;) 166.0035 Tj 0 -113.9203 Td (0259 ) 21.8426 Tj 0 -123.4137 Td (0260 // kalloc.c) 69.8962 Tj 0 -132.9071 Td (0261 char* kalloc$int$;) 144.161 Tj 0 -142.4004 Td (0262 void kfree$char*, int$;) 170.3721 Tj 0 -151.8938 Td (0263 void kinit$void$;) 144.161 Tj 0 -161.3871 Td (0264 ) 21.8426 Tj 0 -170.8805 Td (0265 // kbd.c) 56.7907 Tj 0 -180.3739 Td (0266 void kbdintr$void$;) 152.898 Tj 0 -189.8672 Td (0267 ) 21.8426 Tj 0 -199.3606 Td (0268 // lapic.c) 65.5277 Tj 0 -208.8539 Td (0269 int cpunum$void$;) 148.5295 Tj 0 -218.3473 Td (0270 extern volatile uint* lapic;) 157.2665 Tj 0 -227.8407 Td (0271 void lapiceoi$void$;) 157.2665 Tj 0 -237.334 Td (0272 void lapicinit$int$;) 157.2665 Tj 0 -246.8274 Td (0273 void lapicstartap$uchar, uint$;) 205.3202 Tj 0 -256.3207 Td (0274 void microdelay$int$;) 161.635 Tj 0 -265.8141 Td (0275 ) 21.8426 Tj 0 -275.3075 Td (0276 // mp.c) 52.4222 Tj 0 -284.8008 Td (0277 extern int ismp;) 113.5814 Tj 0 -294.2942 Td (0278 int mpbcpu$void$;) 148.5295 Tj 0 -303.7875 Td (0279 void mpinit$void$;) 148.5295 Tj 0 -313.2809 Td (0280 void mpstartthem$void$;) 170.3721 Tj 0 -322.7743 Td (0281 ) 21.8426 Tj 0 -332.2676 Td (0282 // picirq.c) 69.8962 Tj 0 -341.761 Td (0283 void picenable$int$;) 157.2665 Tj 0 -351.2543 Td (0284 void picinit$void$;) 152.898 Tj 0 -360.7477 Td (0285 ) 21.8426 Tj 0 -370.2411 Td (0286 // pipe.c) 61.1592 Tj 0 -379.7344 Td (0287 int pipealloc$struct file**, struct file**$;) 266.4794 Tj 0 -389.2278 Td (0288 void pipeclose$struct pipe*, int$;) 218.4257 Tj 0 -398.7211 Td (0289 int piperead$struct pipe*, char*, int$;) 244.6368 Tj 0 -408.2145 Td (0290 int pipewrite$struct pipe*, char*, int$;) 249.0053 Tj 0 -417.7079 Td (0291 ) 21.8426 Tj 0 -427.2012 Td (0292 ) 21.8426 Tj 0 -436.6946 Td (0293 ) 21.8426 Tj 0 -446.1879 Td (0294 ) 21.8426 Tj 0 -455.6813 Td (0295 ) 21.8426 Tj 0 -465.1747 Td (0296 ) 21.8426 Tj 0 -474.668 Td (0297 ) 21.8426 Tj 0 -484.1614 Td (0298 ) 21.8426 Tj 0 -493.6547 Td (0299 ) 21.8426 Tj 0 -522.1348 Td (Sheet 02) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 10 10 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/defs.h Page 3) 161.635 Tj 0 -28.4801 Td (0300 // proc.c) 61.1592 Tj 0 -37.9735 Td (0301 struct proc* copyproc$struct proc*$;) 192.2146 Tj 0 -47.4668 Td (0302 void exit$void$;) 139.7925 Tj 0 -56.9602 Td (0303 int fork$void$;) 139.7925 Tj 0 -66.4535 Td (0304 int growproc$int$;) 152.898 Tj 0 -75.9469 Td (0305 int kill$int$;) 135.4239 Tj 0 -85.4403 Td (0306 void pinit$void$;) 144.161 Tj 0 -94.9336 Td (0307 void procdump$void$;) 157.2665 Tj 0 -104.427 Td (0308 void scheduler$void$ __attribute__$\(noretur\ n$\);) 275.2164 Tj 0 -113.9203 Td (0309 void ksegment$void$;) 157.2665 Tj 0 -123.4137 Td (0310 void usegment$void$;) 157.2665 Tj 0 -132.9071 Td (0311 void sleep$void*, struct spinlock*$;) 227.1628 Tj 0 -142.4004 Td (0312 void userinit$void$;) 157.2665 Tj 0 -151.8938 Td (0313 int wait$void$;) 139.7925 Tj 0 -161.3871 Td (0314 void wakeup$void*$;) 152.898 Tj 0 -170.8805 Td (0315 void yield$void$;) 144.161 Tj 0 -180.3739 Td (0316 ) 21.8426 Tj 0 -189.8672 Td (0317 // swtch.S) 65.5277 Tj 0 -199.3606 Td (0318 void swtch$struct context**, struct context*$\ ;) 270.8479 Tj 0 -208.8539 Td (0319 ) 21.8426 Tj 0 -218.3473 Td (0320 // spinlock.c) 78.6333 Tj 0 -227.8407 Td (0321 void acquire$struct spinlock*$;) 205.3202 Tj 0 -237.334 Td (0322 void getcallerpcs$void*, uint*$;) 209.6887 Tj 0 -246.8274 Td (0323 int holding$struct spinlock*$;) 205.3202 Tj 0 -256.3207 Td (0324 void initlock$struct spinlock*, char*$;) 240.2683 Tj 0 -265.8141 Td (0325 void release$struct spinlock*$;) 205.3202 Tj 0 -275.3075 Td (0326 void pushcli;) 135.4239 Tj 0 -284.8008 Td (0327 void popcli;) 131.0554 Tj 0 -294.2942 Td (0328 ) 21.8426 Tj 0 -303.7875 Td (0329 // string.c) 69.8962 Tj 0 -313.2809 Td (0330 int memcmp$const void*, const void*, uint$;) 262.1109 Tj 0 -322.7743 Td (0331 void* memmove$void*, const void*, uint$;) 240.2683 Tj 0 -332.2676 Td (0332 void* memset$void*, int, uint$;) 200.9517 Tj 0 -341.761 Td (0333 char* safestrcpy$char*, const char*, int$;) 249.0053 Tj 0 -351.2543 Td (0334 int strlen$const char*$;) 179.1091 Tj 0 -360.7477 Td (0335 int strncmp$const char*, const char*, uint$;) 266.4794 Tj 0 -370.2411 Td (0336 char* strncpy$char*, const char*, int$;) 235.8998 Tj 0 -379.7344 Td (0337 ) 21.8426 Tj 0 -389.2278 Td (0338 // syscall.c) 74.2647 Tj 0 -398.7211 Td (0339 int argint$int, int*$;) 170.3721 Tj 0 -408.2145 Td (0340 int argptr$int, char**, int$;) 200.9517 Tj 0 -417.7079 Td (0341 int argstr$int, char**$;) 179.1091 Tj 0 -427.2012 Td (0342 int fetchint$struct proc*, uint, int*$;) 244.6368 Tj 0 -436.6946 Td (0343 int fetchstr$struct proc*, uint, char**$;) 253.3738 Tj 0 -446.1879 Td (0344 void syscall$void$;) 152.898 Tj 0 -455.6813 Td (0345 ) 21.8426 Tj 0 -465.1747 Td (0346 // timer.c) 65.5277 Tj 0 -474.668 Td (0347 void timerinit$void$;) 161.635 Tj 0 -484.1614 Td (0348 ) 21.8426 Tj 0 -493.6547 Td (0349 ) 21.8426 Tj 0 -522.1348 Td (Sheet 03) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/defs.h Page 4) 161.635 Tj 0 -28.4801 Td (0350 // trap.c) 61.1592 Tj 0 -37.9735 Td (0351 void idtinit$void$;) 152.898 Tj 0 -47.4668 Td (0352 extern int ticks;) 117.9499 Tj 0 -56.9602 Td (0353 void tvinit$void$;) 148.5295 Tj 0 -66.4535 Td (0354 extern struct spinlock tickslock;) 166.0035 Tj 0 -75.9469 Td (0355 ) 21.8426 Tj 0 -85.4403 Td (0356 // uart.c) 61.1592 Tj 0 -94.9336 Td (0357 void uartinit$void$;) 157.2665 Tj 0 -104.427 Td (0358 void uartintr$void$;) 157.2665 Tj 0 -113.9203 Td (0359 void uartputc$int$;) 152.898 Tj 0 -123.4137 Td (0360 ) 21.8426 Tj 0 -132.9071 Td (0361 // number of elements in fixed-size array) 200.9517 Tj 0 -142.4004 Td (0362 #define NELEM$x$ $sizeof\(x$/sizeof$\(x$[0]\)\)) 209.6887 Tj 0 -151.8938 Td (0363 ) 21.8426 Tj 0 -161.3871 Td (0364 ) 21.8426 Tj 0 -170.8805 Td (0365 ) 21.8426 Tj 0 -180.3739 Td (0366 ) 21.8426 Tj 0 -189.8672 Td (0367 ) 21.8426 Tj 0 -199.3606 Td (0368 ) 21.8426 Tj 0 -208.8539 Td (0369 ) 21.8426 Tj 0 -218.3473 Td (0370 ) 21.8426 Tj 0 -227.8407 Td (0371 ) 21.8426 Tj 0 -237.334 Td (0372 ) 21.8426 Tj 0 -246.8274 Td (0373 ) 21.8426 Tj 0 -256.3207 Td (0374 ) 21.8426 Tj 0 -265.8141 Td (0375 ) 21.8426 Tj 0 -275.3075 Td (0376 ) 21.8426 Tj 0 -284.8008 Td (0377 ) 21.8426 Tj 0 -294.2942 Td (0378 ) 21.8426 Tj 0 -303.7875 Td (0379 ) 21.8426 Tj 0 -313.2809 Td (0380 ) 21.8426 Tj 0 -322.7743 Td (0381 ) 21.8426 Tj 0 -332.2676 Td (0382 ) 21.8426 Tj 0 -341.761 Td (0383 ) 21.8426 Tj 0 -351.2543 Td (0384 ) 21.8426 Tj 0 -360.7477 Td (0385 ) 21.8426 Tj 0 -370.2411 Td (0386 ) 21.8426 Tj 0 -379.7344 Td (0387 ) 21.8426 Tj 0 -389.2278 Td (0388 ) 21.8426 Tj 0 -398.7211 Td (0389 ) 21.8426 Tj 0 -408.2145 Td (0390 ) 21.8426 Tj 0 -417.7079 Td (0391 ) 21.8426 Tj 0 -427.2012 Td (0392 ) 21.8426 Tj 0 -436.6946 Td (0393 ) 21.8426 Tj 0 -446.1879 Td (0394 ) 21.8426 Tj 0 -455.6813 Td (0395 ) 21.8426 Tj 0 -465.1747 Td (0396 ) 21.8426 Tj 0 -474.668 Td (0397 ) 21.8426 Tj 0 -484.1614 Td (0398 ) 21.8426 Tj 0 -493.6547 Td (0399 ) 21.8426 Tj 0 -522.1348 Td (Sheet 03) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 11 11 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/x86.h Page 1) 157.2665 Tj 0 -28.4801 Td (0400 // Routines to let C code use special x86 instructions.) 262.1109 Tj 0 -37.9735 Td (0401 ) 21.8426 Tj 0 -47.4668 Td (0402 static inline uchar) 104.8443 Tj 0 -56.9602 Td (0403 inb$ushort port$) 91.7388 Tj 0 -66.4535 Td (0404 {) 26.2111 Tj 0 -75.9469 Td (0405 uchar data;) 78.6333 Tj 0 -85.4403 Td (0406 ) 21.8426 Tj 0 -94.9336 Td (0407 asm volatile$"in %1,%0" : "=a" \(data$ : "d" $port$\)\ ;) 257.7424 Tj 0 -104.427 Td (0408 return data;) 83.0018 Tj 0 -113.9203 Td (0409 }) 26.2111 Tj 0 -123.4137 Td (0410 ) 21.8426 Tj 0 -132.9071 Td (0411 static inline void) 100.4758 Tj 0 -142.4004 Td (0412 insl$int port, void *addr, int cnt$) 174.7406 Tj 0 -151.8938 Td (0413 {) 26.2111 Tj 0 -161.3871 Td (0414 asm volatile$"cld; rep insl" :) 161.635 Tj 0 -170.8805 Td (0415 "=D" \(addr$, "=c" $cnt$ :) 196.5831 Tj 0 -180.3739 Td (0416 "d" $port$, "0" $addr$, "1" $cnt$ :) 240.2683 Tj 0 -189.8672 Td (0417 "memory", "cc"\);) 157.2665 Tj 0 -199.3606 Td (0418 }) 26.2111 Tj 0 -208.8539 Td (0419 ) 21.8426 Tj 0 -218.3473 Td (0420 static inline void) 100.4758 Tj 0 -227.8407 Td (0421 outb$ushort port, uchar data$) 148.5295 Tj 0 -237.334 Td (0422 {) 26.2111 Tj 0 -246.8274 Td (0423 asm volatile$"out %0,%1" : : "a" \(data$, "d" $port$\ \);) 262.1109 Tj 0 -256.3207 Td (0424 }) 26.2111 Tj 0 -265.8141 Td (0425 ) 21.8426 Tj 0 -275.3075 Td (0426 static inline void) 100.4758 Tj 0 -284.8008 Td (0427 outw$ushort port, ushort data$) 152.898 Tj 0 -294.2942 Td (0428 {) 26.2111 Tj 0 -303.7875 Td (0429 asm volatile$"out %0,%1" : : "a" \(data$, "d" $port$\ \);) 262.1109 Tj 0 -313.2809 Td (0430 }) 26.2111 Tj 0 -322.7743 Td (0431 ) 21.8426 Tj 0 -332.2676 Td (0432 static inline void) 100.4758 Tj 0 -341.761 Td (0433 outsl$int port, const void *addr, int cnt$) 205.3202 Tj 0 -351.2543 Td (0434 {) 26.2111 Tj 0 -360.7477 Td (0435 asm volatile$"cld; rep outsl" :) 166.0035 Tj 0 -370.2411 Td (0436 "=S" \(addr$, "=c" $cnt$ :) 196.5831 Tj 0 -379.7344 Td (0437 "d" $port$, "0" $addr$, "1" $cnt$ :) 240.2683 Tj 0 -389.2278 Td (0438 "cc"\);) 113.5814 Tj 0 -398.7211 Td (0439 }) 26.2111 Tj 0 -408.2145 Td (0440 ) 21.8426 Tj 0 -417.7079 Td (0441 static inline void) 100.4758 Tj 0 -427.2012 Td (0442 stosb$void *addr, int data, int cnt$) 179.1091 Tj 0 -436.6946 Td (0443 {) 26.2111 Tj 0 -446.1879 Td (0444 asm volatile$"cld; rep stosb" :) 166.0035 Tj 0 -455.6813 Td (0445 "=D" \(addr$, "=c" $cnt$ :) 196.5831 Tj 0 -465.1747 Td (0446 "0" $addr$, "1" $cnt$, "a" $data$ :) 240.2683 Tj 0 -474.668 Td (0447 "memory", "cc"\);) 157.2665 Tj 0 -484.1614 Td (0448 }) 26.2111 Tj 0 -493.6547 Td (0449 ) 21.8426 Tj 0 -522.1348 Td (Sheet 04) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/x86.h Page 2) 157.2665 Tj 0 -28.4801 Td (0450 struct segdesc;) 87.3703 Tj 0 -37.9735 Td (0451 ) 21.8426 Tj 0 -47.4668 Td (0452 static inline void) 100.4758 Tj 0 -56.9602 Td (0453 lgdt$struct segdesc *p, int size$) 166.0035 Tj 0 -66.4535 Td (0454 {) 26.2111 Tj 0 -75.9469 Td (0455 volatile ushort pd[3];) 126.6869 Tj 0 -85.4403 Td (0456 ) 21.8426 Tj 0 -94.9336 Td (0457 pd[0] = size-1;) 96.1073 Tj 0 -104.427 Td (0458 pd[1] = $uint$p;) 100.4758 Tj 0 -113.9203 Td (0459 pd[2] = $uint$p >> 16;) 126.6869 Tj 0 -123.4137 Td (0460 ) 21.8426 Tj 0 -132.9071 Td (0461 asm volatile$"lgdt \(%0$" : : "r" $pd$\);) 200.9517 Tj 0 -142.4004 Td (0462 }) 26.2111 Tj 0 -151.8938 Td (0463 ) 21.8426 Tj 0 -161.3871 Td (0464 struct gatedesc;) 91.7388 Tj 0 -170.8805 Td (0465 ) 21.8426 Tj 0 -180.3739 Td (0466 static inline void) 100.4758 Tj 0 -189.8672 Td (0467 lidt$struct gatedesc *p, int size$) 170.3721 Tj 0 -199.3606 Td (0468 {) 26.2111 Tj 0 -208.8539 Td (0469 volatile ushort pd[3];) 126.6869 Tj 0 -218.3473 Td (0470 ) 21.8426 Tj 0 -227.8407 Td (0471 pd[0] = size-1;) 96.1073 Tj 0 -237.334 Td (0472 pd[1] = $uint$p;) 100.4758 Tj 0 -246.8274 Td (0473 pd[2] = $uint$p >> 16;) 126.6869 Tj 0 -256.3207 Td (0474 ) 21.8426 Tj 0 -265.8141 Td (0475 asm volatile$"lidt \(%0$" : : "r" $pd$\);) 200.9517 Tj 0 -275.3075 Td (0476 }) 26.2111 Tj 0 -284.8008 Td (0477 ) 21.8426 Tj 0 -294.2942 Td (0478 static inline void) 100.4758 Tj 0 -303.7875 Td (0479 ltr$ushort sel$) 87.3703 Tj 0 -313.2809 Td (0480 {) 26.2111 Tj 0 -322.7743 Td (0481 asm volatile$"ltr %0" : : "r" \(sel$\);) 192.2146 Tj 0 -332.2676 Td (0482 }) 26.2111 Tj 0 -341.761 Td (0483 ) 21.8426 Tj 0 -351.2543 Td (0484 static inline uint) 100.4758 Tj 0 -360.7477 Td (0485 readeflags$void$) 91.7388 Tj 0 -370.2411 Td (0486 {) 26.2111 Tj 0 -379.7344 Td (0487 uint eflags;) 83.0018 Tj 0 -389.2278 Td (0488 asm volatile$"pushfl; popl %0" : "=r" \(eflags$\);) 240.2683 Tj 0 -398.7211 Td (0489 return eflags;) 91.7388 Tj 0 -408.2145 Td (0490 }) 26.2111 Tj 0 -417.7079 Td (0491 ) 21.8426 Tj 0 -427.2012 Td (0492 ) 21.8426 Tj 0 -436.6946 Td (0493 ) 21.8426 Tj 0 -446.1879 Td (0494 ) 21.8426 Tj 0 -455.6813 Td (0495 ) 21.8426 Tj 0 -465.1747 Td (0496 ) 21.8426 Tj 0 -474.668 Td (0497 ) 21.8426 Tj 0 -484.1614 Td (0498 ) 21.8426 Tj 0 -493.6547 Td (0499 ) 21.8426 Tj 0 -522.1348 Td (Sheet 04) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 12 12 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/x86.h Page 3) 157.2665 Tj 0 -28.4801 Td (0500 static inline uint) 100.4758 Tj 0 -37.9735 Td (0501 xchg$volatile uint *addr, uint newval$) 187.8461 Tj 0 -47.4668 Td (0502 {) 26.2111 Tj 0 -56.9602 Td (0503 uint result;) 83.0018 Tj 0 -66.4535 Td (0504 ) 21.8426 Tj 0 -75.9469 Td (0505 // The + in "+m" denotes a read-modify-write operand.) 262.1109 Tj 0 -85.4403 Td (0506 asm volatile$"lock; xchgl %0, %1" :) 183.4776 Tj 0 -94.9336 Td (0507 "+m" \(*addr$, "=a" $result$ :) 214.0572 Tj 0 -104.427 Td (0508 "1" $newval$ :) 148.5295 Tj 0 -113.9203 Td (0509 "cc"\);) 113.5814 Tj 0 -123.4137 Td (0510 return result;) 91.7388 Tj 0 -132.9071 Td (0511 }) 26.2111 Tj 0 -142.4004 Td (0512 ) 21.8426 Tj 0 -151.8938 Td (0513 static inline void) 100.4758 Tj 0 -161.3871 Td (0514 loadgs$ushort v$) 91.7388 Tj 0 -170.8805 Td (0515 {) 26.2111 Tj 0 -180.3739 Td (0516 asm volatile$"movw %0, %%gs" : : "r" \(v$\);) 214.0572 Tj 0 -189.8672 Td (0517 }) 26.2111 Tj 0 -199.3606 Td (0518 ) 21.8426 Tj 0 -208.8539 Td (0519 static inline void) 100.4758 Tj 0 -218.3473 Td (0520 cli$void$) 61.1592 Tj 0 -227.8407 Td (0521 {) 26.2111 Tj 0 -237.334 Td (0522 asm volatile$"cli"$;) 117.9499 Tj 0 -246.8274 Td (0523 }) 26.2111 Tj 0 -256.3207 Td (0524 ) 21.8426 Tj 0 -265.8141 Td (0525 static inline void) 100.4758 Tj 0 -275.3075 Td (0526 sti$void$) 61.1592 Tj 0 -284.8008 Td (0527 {) 26.2111 Tj 0 -294.2942 Td (0528 asm volatile$"sti"$;) 117.9499 Tj 0 -303.7875 Td (0529 }) 26.2111 Tj 0 -313.2809 Td (0530 ) 21.8426 Tj 0 -322.7743 Td (0531 ) 21.8426 Tj 0 -332.2676 Td (0532 ) 21.8426 Tj 0 -341.761 Td (0533 ) 21.8426 Tj 0 -351.2543 Td (0534 ) 21.8426 Tj 0 -360.7477 Td (0535 ) 21.8426 Tj 0 -370.2411 Td (0536 ) 21.8426 Tj 0 -379.7344 Td (0537 ) 21.8426 Tj 0 -389.2278 Td (0538 ) 21.8426 Tj 0 -398.7211 Td (0539 ) 21.8426 Tj 0 -408.2145 Td (0540 ) 21.8426 Tj 0 -417.7079 Td (0541 ) 21.8426 Tj 0 -427.2012 Td (0542 ) 21.8426 Tj 0 -436.6946 Td (0543 ) 21.8426 Tj 0 -446.1879 Td (0544 ) 21.8426 Tj 0 -455.6813 Td (0545 ) 21.8426 Tj 0 -465.1747 Td (0546 ) 21.8426 Tj 0 -474.668 Td (0547 ) 21.8426 Tj 0 -484.1614 Td (0548 ) 21.8426 Tj 0 -493.6547 Td (0549 ) 21.8426 Tj 0 -522.1348 Td (Sheet 05) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/x86.h Page 4) 157.2665 Tj 0 -28.4801 Td (0550 // Layout of the trap frame built on the stack by the) 253.3738 Tj 0 -37.9735 Td (0551 // hardware and by trapasm.S, and passed to trap.) 244.6368 Tj 0 -47.4668 Td (0552 struct trapframe {) 100.4758 Tj 0 -56.9602 Td (0553 // registers as pushed by pusha) 166.0035 Tj 0 -66.4535 Td (0554 uint edi;) 69.8962 Tj 0 -75.9469 Td (0555 uint esi;) 69.8962 Tj 0 -85.4403 Td (0556 uint ebp;) 69.8962 Tj 0 -94.9336 Td (0557 uint oesp; // useless & ignored) 187.8461 Tj 0 -104.427 Td (0558 uint ebx;) 69.8962 Tj 0 -113.9203 Td (0559 uint edx;) 69.8962 Tj 0 -123.4137 Td (0560 uint ecx;) 69.8962 Tj 0 -132.9071 Td (0561 uint eax;) 69.8962 Tj 0 -142.4004 Td (0562 ) 21.8426 Tj 0 -151.8938 Td (0563 // rest of trap frame) 122.3184 Tj 0 -161.3871 Td (0564 ushort gs;) 74.2647 Tj 0 -170.8805 Td (0565 ushort padding1;) 100.4758 Tj 0 -180.3739 Td (0566 ushort fs;) 74.2647 Tj 0 -189.8672 Td (0567 ushort padding2;) 100.4758 Tj 0 -199.3606 Td (0568 ushort es;) 74.2647 Tj 0 -208.8539 Td (0569 ushort padding3;) 100.4758 Tj 0 -218.3473 Td (0570 ushort ds;) 74.2647 Tj 0 -227.8407 Td (0571 ushort padding4;) 100.4758 Tj 0 -237.334 Td (0572 uint trapno;) 83.0018 Tj 0 -246.8274 Td (0573 ) 21.8426 Tj 0 -256.3207 Td (0574 // below here defined by x86 hardware) 192.2146 Tj 0 -265.8141 Td (0575 uint err;) 69.8962 Tj 0 -275.3075 Td (0576 uint eip;) 69.8962 Tj 0 -284.8008 Td (0577 ushort cs;) 74.2647 Tj 0 -294.2942 Td (0578 ushort padding5;) 100.4758 Tj 0 -303.7875 Td (0579 uint eflags;) 83.0018 Tj 0 -313.2809 Td (0580 ) 21.8426 Tj 0 -322.7743 Td (0581 // below here only when crossing rings, such as from use\ r to kernel) 323.2701 Tj 0 -332.2676 Td (0582 uint esp;) 69.8962 Tj 0 -341.761 Td (0583 ushort ss;) 74.2647 Tj 0 -351.2543 Td (0584 ushort padding6;) 100.4758 Tj 0 -360.7477 Td (0585 };) 30.5796 Tj 0 -370.2411 Td (0586 ) 21.8426 Tj 0 -379.7344 Td (0587 ) 21.8426 Tj 0 -389.2278 Td (0588 ) 21.8426 Tj 0 -398.7211 Td (0589 ) 21.8426 Tj 0 -408.2145 Td (0590 ) 21.8426 Tj 0 -417.7079 Td (0591 ) 21.8426 Tj 0 -427.2012 Td (0592 ) 21.8426 Tj 0 -436.6946 Td (0593 ) 21.8426 Tj 0 -446.1879 Td (0594 ) 21.8426 Tj 0 -455.6813 Td (0595 ) 21.8426 Tj 0 -465.1747 Td (0596 ) 21.8426 Tj 0 -474.668 Td (0597 ) 21.8426 Tj 0 -484.1614 Td (0598 ) 21.8426 Tj 0 -493.6547 Td (0599 ) 21.8426 Tj 0 -522.1348 Td (Sheet 05) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 13 13 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/asm.h Page 1) 157.2665 Tj 0 -28.4801 Td (0600 //) 30.5796 Tj 0 -37.9735 Td (0601 // assembler macros to create x86 segments) 205.3202 Tj 0 -47.4668 Td (0602 //) 30.5796 Tj 0 -56.9602 Td (0603 ) 21.8426 Tj 0 -66.4535 Td (0604 #define SEG_NULLASM \ \\) 305.796 Tj 0 -75.9469 Td (0605 .word 0, 0; \ \\) 305.796 Tj 0 -85.4403 Td (0606 .byte 0, 0, 0, 0) 126.6869 Tj 0 -94.9336 Td (0607 ) 21.8426 Tj 0 -104.427 Td (0608 #define SEG_ASM$type,base,lim$ \ \\) 305.796 Tj 0 -113.9203 Td (0609 .word $\(\(lim$ >> 12\) & 0xffff\), $\(base$ &\ 0xffff\); \\) 305.796 Tj 0 -123.4137 Td (0610 .byte $\(\(base$ >> 16\) & 0xff\), $0x90 | \(ty\ pe$\), \\) 305.796 Tj 0 -132.9071 Td (0611 $0xC0 | \(\(\(lim$ >> 28\) & 0xf\)\), $\ \(\(base$ >> 24\) & 0xff\)) 332.0071 Tj 0 -142.4004 Td (0612 ) 21.8426 Tj 0 -151.8938 Td (0613 #define STA_X 0x8 // Executable segment) 235.8998 Tj 0 -161.3871 Td (0614 #define STA_E 0x4 // Expand down $non-executabl\ e segments$) 318.9016 Tj 0 -170.8805 Td (0615 #define STA_C 0x4 // Conforming code segment $e\ xecutable only$) 336.3756 Tj 0 -180.3739 Td (0616 #define STA_W 0x2 // Writeable $non-executable \ segments$) 310.1645 Tj 0 -189.8672 Td (0617 #define STA_R 0x2 // Readable $executable segme\ nts$) 288.322 Tj 0 -199.3606 Td (0618 #define STA_A 0x1 // Accessed) 192.2146 Tj 0 -208.8539 Td (0619 ) 21.8426 Tj 0 -218.3473 Td (0620 ) 21.8426 Tj 0 -227.8407 Td (0621 ) 21.8426 Tj 0 -237.334 Td (0622 ) 21.8426 Tj 0 -246.8274 Td (0623 ) 21.8426 Tj 0 -256.3207 Td (0624 ) 21.8426 Tj 0 -265.8141 Td (0625 ) 21.8426 Tj 0 -275.3075 Td (0626 ) 21.8426 Tj 0 -284.8008 Td (0627 ) 21.8426 Tj 0 -294.2942 Td (0628 ) 21.8426 Tj 0 -303.7875 Td (0629 ) 21.8426 Tj 0 -313.2809 Td (0630 ) 21.8426 Tj 0 -322.7743 Td (0631 ) 21.8426 Tj 0 -332.2676 Td (0632 ) 21.8426 Tj 0 -341.761 Td (0633 ) 21.8426 Tj 0 -351.2543 Td (0634 ) 21.8426 Tj 0 -360.7477 Td (0635 ) 21.8426 Tj 0 -370.2411 Td (0636 ) 21.8426 Tj 0 -379.7344 Td (0637 ) 21.8426 Tj 0 -389.2278 Td (0638 ) 21.8426 Tj 0 -398.7211 Td (0639 ) 21.8426 Tj 0 -408.2145 Td (0640 ) 21.8426 Tj 0 -417.7079 Td (0641 ) 21.8426 Tj 0 -427.2012 Td (0642 ) 21.8426 Tj 0 -436.6946 Td (0643 ) 21.8426 Tj 0 -446.1879 Td (0644 ) 21.8426 Tj 0 -455.6813 Td (0645 ) 21.8426 Tj 0 -465.1747 Td (0646 ) 21.8426 Tj 0 -474.668 Td (0647 ) 21.8426 Tj 0 -484.1614 Td (0648 ) 21.8426 Tj 0 -493.6547 Td (0649 ) 21.8426 Tj 0 -522.1348 Td (Sheet 06) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/mmu.h Page 1) 157.2665 Tj 0 -28.4801 Td (0650 // This file contains definitions for the) 200.9517 Tj 0 -37.9735 Td (0651 // x86 memory management unit $MMU$.) 179.1091 Tj 0 -47.4668 Td (0652 ) 21.8426 Tj 0 -56.9602 Td (0653 // Eflags register) 100.4758 Tj 0 -66.4535 Td (0654 #define FL_CF 0x00000001 // Carry Flag) 253.3738 Tj 0 -75.9469 Td (0655 #define FL_PF 0x00000004 // Parity Flag) 257.7424 Tj 0 -85.4403 Td (0656 #define FL_AF 0x00000010 // Auxiliary carry\ Flag) 297.059 Tj 0 -94.9336 Td (0657 #define FL_ZF 0x00000040 // Zero Flag) 249.0053 Tj 0 -104.427 Td (0658 #define FL_SF 0x00000080 // Sign Flag) 249.0053 Tj 0 -113.9203 Td (0659 #define FL_TF 0x00000100 // Trap Flag) 249.0053 Tj 0 -123.4137 Td (0660 #define FL_IF 0x00000200 // Interrupt Enabl\ e) 279.5849 Tj 0 -132.9071 Td (0661 #define FL_DF 0x00000400 // Direction Flag) 270.8479 Tj 0 -142.4004 Td (0662 #define FL_OF 0x00000800 // Overflow Flag) 266.4794 Tj 0 -151.8938 Td (0663 #define FL_IOPL_MASK 0x00003000 // I/O Privilege L\ evel bitmask) 327.6386 Tj 0 -161.3871 Td (0664 #define FL_IOPL_0 0x00000000 // IOPL == 0) 257.7424 Tj 0 -170.8805 Td (0665 #define FL_IOPL_1 0x00001000 // IOPL == 1) 257.7424 Tj 0 -180.3739 Td (0666 #define FL_IOPL_2 0x00002000 // IOPL == 2) 257.7424 Tj 0 -189.8672 Td (0667 #define FL_IOPL_3 0x00003000 // IOPL == 3) 257.7424 Tj 0 -199.3606 Td (0668 #define FL_NT 0x00004000 // Nested Task) 257.7424 Tj 0 -208.8539 Td (0669 #define FL_RF 0x00010000 // Resume Flag) 257.7424 Tj 0 -218.3473 Td (0670 #define FL_VM 0x00020000 // Virtual 8086 mo\ de) 283.9534 Tj 0 -227.8407 Td (0671 #define FL_AC 0x00040000 // Alignment Check) 275.2164 Tj 0 -237.334 Td (0672 #define FL_VIF 0x00080000 // Virtual Interru\ pt Flag) 305.796 Tj 0 -246.8274 Td (0673 #define FL_VIP 0x00100000 // Virtual Interru\ pt Pending) 318.9016 Tj 0 -256.3207 Td (0674 #define FL_ID 0x00200000 // ID flag) 240.2683 Tj 0 -265.8141 Td (0675 ) 21.8426 Tj 0 -275.3075 Td (0676 // Segment Descriptor) 113.5814 Tj 0 -284.8008 Td (0677 struct segdesc {) 91.7388 Tj 0 -294.2942 Td (0678 uint lim_15_0 : 16; // Low bits of segment limit) 244.6368 Tj 0 -303.7875 Td (0679 uint base_15_0 : 16; // Low bits of segment base address) 275.2164 Tj 0 -313.2809 Td (0680 uint base_23_16 : 8; // Middle bits of segment base addr\ ess) 288.322 Tj 0 -322.7743 Td (0681 uint type : 4; // Segment type $see STS_ constant\ s$) 279.5849 Tj 0 -332.2676 Td (0682 uint s : 1; // 0 = system, 1 = application) 253.3738 Tj 0 -341.761 Td (0683 uint dpl : 2; // Descriptor Privilege Level) 249.0053 Tj 0 -351.2543 Td (0684 uint p : 1; // Present) 166.0035 Tj 0 -360.7477 Td (0685 uint lim_19_16 : 4; // High bits of segment limit) 249.0053 Tj 0 -370.2411 Td (0686 uint avl : 1; // Unused $available for software \ use$) 288.322 Tj 0 -379.7344 Td (0687 uint rsv1 : 1; // Reserved) 170.3721 Tj 0 -389.2278 Td (0688 uint db : 1; // 0 = 16-bit segment, 1 = 32-bit s\ egment) 301.4275 Tj 0 -398.7211 Td (0689 uint g : 1; // Granularity: limit scaled by 4K \ when set) 310.1645 Tj 0 -408.2145 Td (0690 uint base_31_24 : 8; // High bits of segment base addres\ s) 279.5849 Tj 0 -417.7079 Td (0691 };) 30.5796 Tj 0 -427.2012 Td (0692 ) 21.8426 Tj 0 -436.6946 Td (0693 ) 21.8426 Tj 0 -446.1879 Td (0694 ) 21.8426 Tj 0 -455.6813 Td (0695 ) 21.8426 Tj 0 -465.1747 Td (0696 ) 21.8426 Tj 0 -474.668 Td (0697 ) 21.8426 Tj 0 -484.1614 Td (0698 ) 21.8426 Tj 0 -493.6547 Td (0699 ) 21.8426 Tj 0 -522.1348 Td (Sheet 06) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 14 14 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/mmu.h Page 2) 157.2665 Tj 0 -28.4801 Td (0700 // Normal segment) 96.1073 Tj 0 -37.9735 Td (0701 #define SEG$type, base, lim, dpl$ $struct segdesc$ \ \\) 262.1109 Tj 0 -47.4668 Td (0702 { $\(lim$ >> 12\) & 0xffff, $uint$$base$ & 0xffff, \ \\) 262.1109 Tj 0 -56.9602 Td (0703 $\(uint$$base$ >> 16\) & 0xff, type, 1, dpl, 1, \ \\) 262.1109 Tj 0 -66.4535 Td (0704 $uint$$lim$ >> 28, 0, 0, 1, 1, $uint$$base$ >> 2\ 4 }) 253.3738 Tj 0 -75.9469 Td (0705 ) 21.8426 Tj 0 -85.4403 Td (0706 #define SEG16$type, base, lim, dpl$ $struct segdesc$ \ \\) 262.1109 Tj 0 -94.9336 Td (0707 { $lim$ & 0xffff, $uint$$base$ & 0xffff, \ \\) 262.1109 Tj 0 -104.427 Td (0708 $\(uint$$base$ >> 16\) & 0xff, type, 1, dpl, 1, \ \\) 262.1109 Tj 0 -113.9203 Td (0709 $uint$$lim$ >> 16, 0, 0, 1, 0, $uint$$base$ >> 2\ 4 }) 253.3738 Tj 0 -123.4137 Td (0710 ) 21.8426 Tj 0 -132.9071 Td (0711 #define DPL_USER 0x3 // User DPL) 192.2146 Tj 0 -142.4004 Td (0712 ) 21.8426 Tj 0 -151.8938 Td (0713 // Application segment type bits) 161.635 Tj 0 -161.3871 Td (0714 #define STA_X 0x8 // Executable segment) 235.8998 Tj 0 -170.8805 Td (0715 #define STA_E 0x4 // Expand down $non-executabl\ e segments$) 318.9016 Tj 0 -180.3739 Td (0716 #define STA_C 0x4 // Conforming code segment $e\ xecutable only$) 336.3756 Tj 0 -189.8672 Td (0717 #define STA_W 0x2 // Writeable $non-executable \ segments$) 310.1645 Tj 0 -199.3606 Td (0718 #define STA_R 0x2 // Readable $executable segme\ nts$) 288.322 Tj 0 -208.8539 Td (0719 #define STA_A 0x1 // Accessed) 192.2146 Tj 0 -218.3473 Td (0720 ) 21.8426 Tj 0 -227.8407 Td (0721 // System segment type bits) 139.7925 Tj 0 -237.334 Td (0722 #define STS_T16A 0x1 // Available 16-bit TSS) 244.6368 Tj 0 -246.8274 Td (0723 #define STS_LDT 0x2 // Local Descriptor Table) 253.3738 Tj 0 -256.3207 Td (0724 #define STS_T16B 0x3 // Busy 16-bit TSS) 222.7942 Tj 0 -265.8141 Td (0725 #define STS_CG16 0x4 // 16-bit Call Gate) 227.1628 Tj 0 -275.3075 Td (0726 #define STS_TG 0x5 // Task Gate / Coum Transmitio\ ns) 283.9534 Tj 0 -284.8008 Td (0727 #define STS_IG16 0x6 // 16-bit Interrupt Gate) 249.0053 Tj 0 -294.2942 Td (0728 #define STS_TG16 0x7 // 16-bit Trap Gate) 227.1628 Tj 0 -303.7875 Td (0729 #define STS_T32A 0x9 // Available 32-bit TSS) 244.6368 Tj 0 -313.2809 Td (0730 #define STS_T32B 0xB // Busy 32-bit TSS) 222.7942 Tj 0 -322.7743 Td (0731 #define STS_CG32 0xC // 32-bit Call Gate) 227.1628 Tj 0 -332.2676 Td (0732 #define STS_IG32 0xE // 32-bit Interrupt Gate) 249.0053 Tj 0 -341.761 Td (0733 #define STS_TG32 0xF // 32-bit Trap Gate) 227.1628 Tj 0 -351.2543 Td (0734 ) 21.8426 Tj 0 -360.7477 Td (0735 ) 21.8426 Tj 0 -370.2411 Td (0736 ) 21.8426 Tj 0 -379.7344 Td (0737 ) 21.8426 Tj 0 -389.2278 Td (0738 ) 21.8426 Tj 0 -398.7211 Td (0739 ) 21.8426 Tj 0 -408.2145 Td (0740 ) 21.8426 Tj 0 -417.7079 Td (0741 ) 21.8426 Tj 0 -427.2012 Td (0742 ) 21.8426 Tj 0 -436.6946 Td (0743 ) 21.8426 Tj 0 -446.1879 Td (0744 ) 21.8426 Tj 0 -455.6813 Td (0745 ) 21.8426 Tj 0 -465.1747 Td (0746 ) 21.8426 Tj 0 -474.668 Td (0747 ) 21.8426 Tj 0 -484.1614 Td (0748 ) 21.8426 Tj 0 -493.6547 Td (0749 ) 21.8426 Tj 0 -522.1348 Td (Sheet 07) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/mmu.h Page 3) 157.2665 Tj 0 -28.4801 Td (0750 // Task state segment format) 144.161 Tj 0 -37.9735 Td (0751 struct taskstate {) 100.4758 Tj 0 -47.4668 Td (0752 uint link; // Old ts selector) 192.2146 Tj 0 -56.9602 Td (0753 uint esp0; // Stack pointers and segment selecto\ rs) 283.9534 Tj 0 -66.4535 Td (0754 ushort ss0; // after an increase in privilege l\ evel) 292.6905 Tj 0 -75.9469 Td (0755 ushort padding1;) 100.4758 Tj 0 -85.4403 Td (0756 uint *esp1;) 78.6333 Tj 0 -94.9336 Td (0757 ushort ss1;) 78.6333 Tj 0 -104.427 Td (0758 ushort padding2;) 100.4758 Tj 0 -113.9203 Td (0759 uint *esp2;) 78.6333 Tj 0 -123.4137 Td (0760 ushort ss2;) 78.6333 Tj 0 -132.9071 Td (0761 ushort padding3;) 100.4758 Tj 0 -142.4004 Td (0762 void *cr3; // Page directory base) 209.6887 Tj 0 -151.8938 Td (0763 uint *eip; // Saved state from last task switch) 270.8479 Tj 0 -161.3871 Td (0764 uint eflags;) 83.0018 Tj 0 -170.8805 Td (0765 uint eax; // More saved state $registers$) 249.0053 Tj 0 -180.3739 Td (0766 uint ecx;) 69.8962 Tj 0 -189.8672 Td (0767 uint edx;) 69.8962 Tj 0 -199.3606 Td (0768 uint ebx;) 69.8962 Tj 0 -208.8539 Td (0769 uint *esp;) 74.2647 Tj 0 -218.3473 Td (0770 uint *ebp;) 74.2647 Tj 0 -227.8407 Td (0771 uint esi;) 69.8962 Tj 0 -237.334 Td (0772 uint edi;) 69.8962 Tj 0 -246.8274 Td (0773 ushort es; // Even more saved state $segment se\ lectors$) 305.796 Tj 0 -256.3207 Td (0774 ushort padding4;) 100.4758 Tj 0 -265.8141 Td (0775 ushort cs;) 74.2647 Tj 0 -275.3075 Td (0776 ushort padding5;) 100.4758 Tj 0 -284.8008 Td (0777 ushort ss;) 74.2647 Tj 0 -294.2942 Td (0778 ushort padding6;) 100.4758 Tj 0 -303.7875 Td (0779 ushort ds;) 74.2647 Tj 0 -313.2809 Td (0780 ushort padding7;) 100.4758 Tj 0 -322.7743 Td (0781 ushort fs;) 74.2647 Tj 0 -332.2676 Td (0782 ushort padding8;) 100.4758 Tj 0 -341.761 Td (0783 ushort gs;) 74.2647 Tj 0 -351.2543 Td (0784 ushort padding9;) 100.4758 Tj 0 -360.7477 Td (0785 ushort ldt;) 78.6333 Tj 0 -370.2411 Td (0786 ushort padding10;) 104.8443 Tj 0 -379.7344 Td (0787 ushort t; // Trap on task switch) 209.6887 Tj 0 -389.2278 Td (0788 ushort iomb; // I/O map base address) 214.0572 Tj 0 -398.7211 Td (0789 };) 30.5796 Tj 0 -408.2145 Td (0790 ) 21.8426 Tj 0 -417.7079 Td (0791 ) 21.8426 Tj 0 -427.2012 Td (0792 ) 21.8426 Tj 0 -436.6946 Td (0793 ) 21.8426 Tj 0 -446.1879 Td (0794 ) 21.8426 Tj 0 -455.6813 Td (0795 ) 21.8426 Tj 0 -465.1747 Td (0796 ) 21.8426 Tj 0 -474.668 Td (0797 ) 21.8426 Tj 0 -484.1614 Td (0798 ) 21.8426 Tj 0 -493.6547 Td (0799 ) 21.8426 Tj 0 -522.1348 Td (Sheet 07) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 15 15 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/mmu.h Page 4) 157.2665 Tj 0 -28.4801 Td (0800 // Gate descriptors for interrupts and traps) 214.0572 Tj 0 -37.9735 Td (0801 struct gatedesc {) 96.1073 Tj 0 -47.4668 Td (0802 uint off_15_0 : 16; // low 16 bits of offset in segmen\ t) 279.5849 Tj 0 -56.9602 Td (0803 uint cs : 16; // code segment selector) 231.5313 Tj 0 -66.4535 Td (0804 uint args : 5; // # args, 0 for interrupt/trap ga\ tes) 288.322 Tj 0 -75.9469 Td (0805 uint rsv1 : 3; // reserved$should be zero I gues\ s$) 279.5849 Tj 0 -85.4403 Td (0806 uint type : 4; // type$STS_{TG,IG32,TG32}$) 244.6368 Tj 0 -94.9336 Td (0807 uint s : 1; // must be 0 $system$) 218.4257 Tj 0 -104.427 Td (0808 uint dpl : 2; // descriptor$meaning new$ privi\ lege level) 310.1645 Tj 0 -113.9203 Td (0809 uint p : 1; // Present) 170.3721 Tj 0 -123.4137 Td (0810 uint off_31_16 : 16; // high bits of offset in segment) 270.8479 Tj 0 -132.9071 Td (0811 };) 30.5796 Tj 0 -142.4004 Td (0812 ) 21.8426 Tj 0 -151.8938 Td (0813 // Set up a normal interrupt/trap gate descriptor.) 240.2683 Tj 0 -161.3871 Td (0814 // - istrap: 1 for a trap $= exception$ gate, 0 for an i\ nterrupt gate.) 327.6386 Tj 0 -170.8805 Td (0815 // interrupt gate clears FL_IF, trap gate leaves FL_IF a\ lone) 292.6905 Tj 0 -180.3739 Td (0816 // - sel: Code segment selector for interrupt/trap handler) 275.2164 Tj 0 -189.8672 Td (0817 // - off: Offset in code segment for interrupt/trap handle\ r) 279.5849 Tj 0 -199.3606 Td (0818 // - dpl: Descriptor Privilege Level -) 187.8461 Tj 0 -208.8539 Td (0819 // the privilege level required for software to inv\ oke) 288.322 Tj 0 -218.3473 Td (0820 // this interrupt/trap gate explicitly using an int\ instruction.) 332.0071 Tj 0 -227.8407 Td (0821 #define SETGATE$gate, istrap, sel, off, d$ \ \\) 279.5849 Tj 0 -237.334 Td (0822 { \ \\) 279.5849 Tj 0 -246.8274 Td (0823 $gate$.off_15_0 = $uint$ $off$ & 0xffff; \ \\) 279.5849 Tj 0 -256.3207 Td (0824 $gate$.cs = $sel$; \ \\) 279.5849 Tj 0 -265.8141 Td (0825 $gate$.args = 0; \ \\) 279.5849 Tj 0 -275.3075 Td (0826 $gate$.rsv1 = 0; \ \\) 279.5849 Tj 0 -284.8008 Td (0827 $gate$.type = $istrap$ ? STS_TG32 : STS_IG32; \ \\) 279.5849 Tj 0 -294.2942 Td (0828 $gate$.s = 0; \ \\) 279.5849 Tj 0 -303.7875 Td (0829 $gate$.dpl = $d$; \ \\) 279.5849 Tj 0 -313.2809 Td (0830 $gate$.p = 1; \ \\) 279.5849 Tj 0 -322.7743 Td (0831 $gate$.off_31_16 = $uint$ $off$ >> 16; \ \\) 279.5849 Tj 0 -332.2676 Td (0832 }) 26.2111 Tj 0 -341.761 Td (0833 ) 21.8426 Tj 0 -351.2543 Td (0834 ) 21.8426 Tj 0 -360.7477 Td (0835 ) 21.8426 Tj 0 -370.2411 Td (0836 ) 21.8426 Tj 0 -379.7344 Td (0837 ) 21.8426 Tj 0 -389.2278 Td (0838 ) 21.8426 Tj 0 -398.7211 Td (0839 ) 21.8426 Tj 0 -408.2145 Td (0840 ) 21.8426 Tj 0 -417.7079 Td (0841 ) 21.8426 Tj 0 -427.2012 Td (0842 ) 21.8426 Tj 0 -436.6946 Td (0843 ) 21.8426 Tj 0 -446.1879 Td (0844 ) 21.8426 Tj 0 -455.6813 Td (0845 ) 21.8426 Tj 0 -465.1747 Td (0846 ) 21.8426 Tj 0 -474.668 Td (0847 ) 21.8426 Tj 0 -484.1614 Td (0848 ) 21.8426 Tj 0 -493.6547 Td (0849 ) 21.8426 Tj 0 -522.1348 Td (Sheet 08) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/elf.h Page 1) 157.2665 Tj 0 -28.4801 Td (0850 // Format of an ELF executable file) 174.7406 Tj 0 -37.9735 Td (0851 ) 21.8426 Tj 0 -47.4668 Td (0852 #define ELF_MAGIC 0x464C457FU // "\\x7FELF" in little end\ ian) 283.9534 Tj 0 -56.9602 Td (0853 ) 21.8426 Tj 0 -66.4535 Td (0854 // File header) 83.0018 Tj 0 -75.9469 Td (0855 struct elfhdr {) 87.3703 Tj 0 -85.4403 Td (0856 uint magic; // must equal ELF_MAGIC) 187.8461 Tj 0 -94.9336 Td (0857 uchar elf[12];) 91.7388 Tj 0 -104.427 Td (0858 ushort type;) 83.0018 Tj 0 -113.9203 Td (0859 ushort machine;) 96.1073 Tj 0 -123.4137 Td (0860 uint version;) 87.3703 Tj 0 -132.9071 Td (0861 uint entry;) 78.6333 Tj 0 -142.4004 Td (0862 uint phoff;) 78.6333 Tj 0 -151.8938 Td (0863 uint shoff;) 78.6333 Tj 0 -161.3871 Td (0864 uint flags;) 78.6333 Tj 0 -170.8805 Td (0865 ushort ehsize;) 91.7388 Tj 0 -180.3739 Td (0866 ushort phentsize;) 104.8443 Tj 0 -189.8672 Td (0867 ushort phnum;) 87.3703 Tj 0 -199.3606 Td (0868 ushort shentsize;) 104.8443 Tj 0 -208.8539 Td (0869 ushort shnum;) 87.3703 Tj 0 -218.3473 Td (0870 ushort shstrndx;) 100.4758 Tj 0 -227.8407 Td (0871 };) 30.5796 Tj 0 -237.334 Td (0872 ) 21.8426 Tj 0 -246.8274 Td (0873 // Program section header) 131.0554 Tj 0 -256.3207 Td (0874 struct proghdr {) 91.7388 Tj 0 -265.8141 Td (0875 uint type;) 74.2647 Tj 0 -275.3075 Td (0876 uint offset;) 83.0018 Tj 0 -284.8008 Td (0877 uint va;) 65.5277 Tj 0 -294.2942 Td (0878 uint pa;) 65.5277 Tj 0 -303.7875 Td (0879 uint filesz;) 83.0018 Tj 0 -313.2809 Td (0880 uint memsz;) 78.6333 Tj 0 -322.7743 Td (0881 uint flags;) 78.6333 Tj 0 -332.2676 Td (0882 uint align;) 78.6333 Tj 0 -341.761 Td (0883 };) 30.5796 Tj 0 -351.2543 Td (0884 ) 21.8426 Tj 0 -360.7477 Td (0885 // Values for Proghdr type) 135.4239 Tj 0 -370.2411 Td (0886 #define ELF_PROG_LOAD 1) 166.0035 Tj 0 -379.7344 Td (0887 ) 21.8426 Tj 0 -389.2278 Td (0888 // Flag bits for Proghdr flags) 152.898 Tj 0 -398.7211 Td (0889 #define ELF_PROG_FLAG_EXEC 1) 166.0035 Tj 0 -408.2145 Td (0890 #define ELF_PROG_FLAG_WRITE 2) 166.0035 Tj 0 -417.7079 Td (0891 #define ELF_PROG_FLAG_READ 4) 166.0035 Tj 0 -427.2012 Td (0892 ) 21.8426 Tj 0 -436.6946 Td (0893 ) 21.8426 Tj 0 -446.1879 Td (0894 ) 21.8426 Tj 0 -455.6813 Td (0895 ) 21.8426 Tj 0 -465.1747 Td (0896 ) 21.8426 Tj 0 -474.668 Td (0897 ) 21.8426 Tj 0 -484.1614 Td (0898 ) 21.8426 Tj 0 -493.6547 Td (0899 ) 21.8426 Tj 0 -522.1348 Td (Sheet 08) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 16 16 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/bootasm.S Page 1) 174.7406 Tj 0 -28.4801 Td (0900 #include "asm.h") 91.7388 Tj 0 -37.9735 Td (0901 ) 21.8426 Tj 0 -47.4668 Td (0902 # Start the first CPU: switch to 32-bit protected mode, ju\ mp into C.) 318.9016 Tj 0 -56.9602 Td (0903 # The BIOS loads this code from the first sector of the ha\ rd disk into) 327.6386 Tj 0 -66.4535 Td (0904 # memory at physical address 0x7c00 and starts executing i\ n real mode) 323.2701 Tj 0 -75.9469 Td (0905 # with %cs=0 %ip=7c00.) 117.9499 Tj 0 -85.4403 Td (0906 ) 21.8426 Tj 0 -94.9336 Td (0907 #define SEG_KCODE 1 // kernel code) 174.7406 Tj 0 -104.427 Td (0908 #define SEG_KDATA 2 // kernel data+stack) 200.9517 Tj 0 -113.9203 Td (0909 ) 21.8426 Tj 0 -123.4137 Td (0910 #define CR0_PE 1 // protected mode enable bit) 235.8998 Tj 0 -132.9071 Td (0911 ) 21.8426 Tj 0 -142.4004 Td (0912 .code16 # Assemble for 16-bit mode) 266.4794 Tj 0 -151.8938 Td (0913 .globl start) 74.2647 Tj 0 -161.3871 Td (0914 start:) 48.0537 Tj 0 -170.8805 Td (0915 cli # Disable interrupts) 240.2683 Tj 0 -180.3739 Td (0916 ) 21.8426 Tj 0 -189.8672 Td (0917 # Set up the important data segment registers $DS, ES, \ SS$.) 288.322 Tj 0 -199.3606 Td (0918 xorw %ax,%ax # Segment number zero) 244.6368 Tj 0 -208.8539 Td (0919 movw %ax,%ds # -> Data Segment) 227.1628 Tj 0 -218.3473 Td (0920 movw %ax,%es # -> Extra Segment) 231.5313 Tj 0 -227.8407 Td (0921 movw %ax,%ss # -> Stack Segment) 231.5313 Tj 0 -237.334 Td (0922 ) 21.8426 Tj 0 -246.8274 Td (0923 # Enable A20:) 87.3703 Tj 0 -256.3207 Td (0924 # For backwards compatibility with the earliest PCs, p\ hysical) 305.796 Tj 0 -265.8141 Td (0925 # address line 20 is tied low, so that addresses highe\ r than) 301.4275 Tj 0 -275.3075 Td (0926 # 1MB wrap around to zero by default. This code undoe\ s this.) 305.796 Tj 0 -284.8008 Td (0927 seta20.1:) 61.1592 Tj 0 -294.2942 Td (0928 inb $0x64,%al # Wait for not busy) 253.3738 Tj 0 -303.7875 Td (0929 testb $0x2,%al) 100.4758 Tj 0 -313.2809 Td (0930 jnz seta20.1) 100.4758 Tj 0 -322.7743 Td (0931 ) 21.8426 Tj 0 -332.2676 Td (0932 movb $0xd1,%al # 0xd1 -> port 0x64) 253.3738 Tj 0 -341.761 Td (0933 outb %al,$0x64) 104.8443 Tj 0 -351.2543 Td (0934 ) 21.8426 Tj 0 -360.7477 Td (0935 seta20.2:) 61.1592 Tj 0 -370.2411 Td (0936 inb $0x64,%al # Wait for not busy) 253.3738 Tj 0 -379.7344 Td (0937 testb $0x2,%al) 100.4758 Tj 0 -389.2278 Td (0938 jnz seta20.2) 100.4758 Tj 0 -398.7211 Td (0939 ) 21.8426 Tj 0 -408.2145 Td (0940 movb $0xdf,%al # 0xdf -> port 0x60) 253.3738 Tj 0 -417.7079 Td (0941 outb %al,$0x60) 104.8443 Tj 0 -427.2012 Td (0942 ) 21.8426 Tj 0 -436.6946 Td (0943 ) 21.8426 Tj 0 -446.1879 Td (0944 ) 21.8426 Tj 0 -455.6813 Td (0945 ) 21.8426 Tj 0 -465.1747 Td (0946 ) 21.8426 Tj 0 -474.668 Td (0947 ) 21.8426 Tj 0 -484.1614 Td (0948 ) 21.8426 Tj 0 -493.6547 Td (0949 ) 21.8426 Tj 0 -522.1348 Td (Sheet 09) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/bootasm.S Page 2) 174.7406 Tj 0 -28.4801 Td (0950 # Switch from real to protected mode, using a bootstrap \ GDT) 288.322 Tj 0 -37.9735 Td (0951 # and segment translation that makes virtual addresses) 266.4794 Tj 0 -47.4668 Td (0952 # identical to physical addresses, so that the) 231.5313 Tj 0 -56.9602 Td (0953 # effective memory map does not change during the switch\ .) 279.5849 Tj 0 -66.4535 Td (0954 lgdt gdtdesc) 96.1073 Tj 0 -75.9469 Td (0955 movl %cr0, %eax) 109.2129 Tj 0 -85.4403 Td (0956 orl $CR0_PE, %eax) 122.3184 Tj 0 -94.9336 Td (0957 movl %eax, %cr0) 109.2129 Tj 0 -104.427 Td (0958 ) 21.8426 Tj 0 -113.9203 Td (0959 # Jump to next instruction, but in 32-bit code segment.) 270.8479 Tj 0 -123.4137 Td (0960 # Switches processor into 32-bit mode.) 196.5831 Tj 0 -132.9071 Td (0961 ljmp $$SEG_KCODE<<3$, $start32) 174.7406 Tj 0 -142.4004 Td (0962 ) 21.8426 Tj 0 -151.8938 Td (0963 .code32 # Assemble for 32-bit mode) 266.4794 Tj 0 -161.3871 Td (0964 start32:) 56.7907 Tj 0 -170.8805 Td (0965 # Set up the protected-mode data segment registers) 249.0053 Tj 0 -180.3739 Td (0966 movw $$SEG_KDATA<<3$, %ax # Our data segment sel\ ector) 288.322 Tj 0 -189.8672 Td (0967 movw %ax, %ds # -> DS: Data Segment) 262.1109 Tj 0 -199.3606 Td (0968 movw %ax, %es # -> ES: Extra Segment) 266.4794 Tj 0 -208.8539 Td (0969 movw %ax, %ss # -> SS: Stack Segment) 266.4794 Tj 0 -218.3473 Td (0970 movw $0, %ax # Zero segments not read\ y for use) 314.533 Tj 0 -227.8407 Td (0971 movw %ax, %fs # -> FS) 200.9517 Tj 0 -237.334 Td (0972 movw %ax, %gs # -> GS) 200.9517 Tj 0 -246.8274 Td (0973 ) 21.8426 Tj 0 -256.3207 Td (0974 # Set up the stack pointer and call into C.) 218.4257 Tj 0 -265.8141 Td (0975 movl $start, %esp) 117.9499 Tj 0 -275.3075 Td (0976 call bootmain) 100.4758 Tj 0 -284.8008 Td (0977 ) 21.8426 Tj 0 -294.2942 Td (0978 # If bootmain returns $it shouldn't$, trigger a Bochs) 262.1109 Tj 0 -303.7875 Td (0979 # breakpoint if running under Bochs, then loop.) 235.8998 Tj 0 -313.2809 Td (0980 movw $0x8a00, %ax # 0x8a00 -> port 0x8a00) 270.8479 Tj 0 -322.7743 Td (0981 movw %ax, %dx) 100.4758 Tj 0 -332.2676 Td (0982 outw %ax, %dx) 100.4758 Tj 0 -341.761 Td (0983 movw $0x8e00, %ax # 0x8e00 -> port 0x8a00) 270.8479 Tj 0 -351.2543 Td (0984 outw %ax, %dx) 100.4758 Tj 0 -360.7477 Td (0985 spin:) 43.6851 Tj 0 -370.2411 Td (0986 jmp spin) 83.0018 Tj 0 -379.7344 Td (0987 ) 21.8426 Tj 0 -389.2278 Td (0988 # Bootstrap GDT) 87.3703 Tj 0 -398.7211 Td (0989 .p2align 2 # force 4 byte a\ lignment) 310.1645 Tj 0 -408.2145 Td (0990 gdt:) 39.3166 Tj 0 -417.7079 Td (0991 SEG_NULLASM # null seg) 249.0053 Tj 0 -427.2012 Td (0992 SEG_ASM$STA_X|STA_R, 0x0, 0xffffffff$ # code seg) 249.0053 Tj 0 -436.6946 Td (0993 SEG_ASM$STA_W, 0x0, 0xffffffff$ # data seg) 249.0053 Tj 0 -446.1879 Td (0994 ) 21.8426 Tj 0 -455.6813 Td (0995 gdtdesc:) 56.7907 Tj 0 -465.1747 Td (0996 .word $gdtdesc - gdt - 1$ \ # sizeof$gdt$ - 1) 345.1126 Tj 0 -474.668 Td (0997 .long gdt # address gdt) 262.1109 Tj 0 -484.1614 Td (0998 ) 21.8426 Tj 0 -493.6547 Td (0999 ) 21.8426 Tj 0 -522.1348 Td (Sheet 09) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 17 17 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/bootother.S Page 1) 183.4776 Tj 0 -28.4801 Td (1000 #include "asm.h") 91.7388 Tj 0 -37.9735 Td (1001 ) 21.8426 Tj 0 -47.4668 Td (1002 # Each non-boot CPU $"AP"$ is started up in response to \ a STARTUP) 305.796 Tj 0 -56.9602 Td (1003 # IPI from the boot CPU. Section B.4.2 of the Multi-Proce\ ssor) 292.6905 Tj 0 -66.4535 Td (1004 # Specification says that the AP will start in real mode w\ ith CS:IP) 314.533 Tj 0 -75.9469 Td (1005 # set to XY00:0000, where XY is an 8-bit value sent with t\ he) 283.9534 Tj 0 -85.4403 Td (1006 # STARTUP. Thus this code must start at a 4096-byte bounda\ ry.) 288.322 Tj 0 -94.9336 Td (1007 #) 26.2111 Tj 0 -104.427 Td (1008 # Because this code sets DS to zero, it must sit) 231.5313 Tj 0 -113.9203 Td (1009 # at an address in the low 2^16 bytes.) 187.8461 Tj 0 -123.4137 Td (1010 #) 26.2111 Tj 0 -132.9071 Td (1011 # Bootothers $in main.c$ sends the STARTUPs, one at a ti\ me.) 279.5849 Tj 0 -142.4004 Td (1012 # It puts this code $start$ at 0x7000.) 187.8461 Tj 0 -151.8938 Td (1013 # It puts the correct %esp in start-4,) 187.8461 Tj 0 -161.3871 Td (1014 # and the place to jump to in start-8.) 187.8461 Tj 0 -170.8805 Td (1015 #) 26.2111 Tj 0 -180.3739 Td (1016 # This code is identical to bootasm.S except:) 218.4257 Tj 0 -189.8672 Td (1017 # - it does not need to enable A20) 179.1091 Tj 0 -199.3606 Td (1018 # - it uses the address at start-4 for the %esp) 235.8998 Tj 0 -208.8539 Td (1019 # - it jumps to the address at start-8 instead of callin\ g bootmain) 318.9016 Tj 0 -218.3473 Td (1020 ) 21.8426 Tj 0 -227.8407 Td (1021 #define SEG_KCODE 1 // kernel code) 174.7406 Tj 0 -237.334 Td (1022 #define SEG_KDATA 2 // kernel data+stack) 200.9517 Tj 0 -246.8274 Td (1023 ) 21.8426 Tj 0 -256.3207 Td (1024 #define CR0_PE 1 // protected mode enable bit) 235.8998 Tj 0 -265.8141 Td (1025 ) 21.8426 Tj 0 -275.3075 Td (1026 .code16 # Assemble for 16-bit mode) 266.4794 Tj 0 -284.8008 Td (1027 .globl start) 74.2647 Tj 0 -294.2942 Td (1028 start:) 48.0537 Tj 0 -303.7875 Td (1029 cli # Disable interrupts) 240.2683 Tj 0 -313.2809 Td (1030 ) 21.8426 Tj 0 -322.7743 Td (1031 # Set up the important data segment registers $DS, ES, \ SS$.) 288.322 Tj 0 -332.2676 Td (1032 xorw %ax,%ax # Segment number zero) 244.6368 Tj 0 -341.761 Td (1033 movw %ax,%ds # -> Data Segment) 227.1628 Tj 0 -351.2543 Td (1034 movw %ax,%es # -> Extra Segment) 231.5313 Tj 0 -360.7477 Td (1035 movw %ax,%ss # -> Stack Segment) 231.5313 Tj 0 -370.2411 Td (1036 ) 21.8426 Tj 0 -379.7344 Td (1037 ) 21.8426 Tj 0 -389.2278 Td (1038 ) 21.8426 Tj 0 -398.7211 Td (1039 ) 21.8426 Tj 0 -408.2145 Td (1040 ) 21.8426 Tj 0 -417.7079 Td (1041 ) 21.8426 Tj 0 -427.2012 Td (1042 ) 21.8426 Tj 0 -436.6946 Td (1043 ) 21.8426 Tj 0 -446.1879 Td (1044 ) 21.8426 Tj 0 -455.6813 Td (1045 ) 21.8426 Tj 0 -465.1747 Td (1046 ) 21.8426 Tj 0 -474.668 Td (1047 ) 21.8426 Tj 0 -484.1614 Td (1048 ) 21.8426 Tj 0 -493.6547 Td (1049 ) 21.8426 Tj 0 -522.1348 Td (Sheet 10) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/bootother.S Page 2) 183.4776 Tj 0 -28.4801 Td (1050 # Switch from real to protected mode, using a bootstrap \ GDT) 288.322 Tj 0 -37.9735 Td (1051 # and segment translation that makes virtual addresses) 266.4794 Tj 0 -47.4668 Td (1052 # identical to physical addresses, so that the) 231.5313 Tj 0 -56.9602 Td (1053 # effective memory map does not change during the switch\ .) 279.5849 Tj 0 -66.4535 Td (1054 lgdt gdtdesc) 96.1073 Tj 0 -75.9469 Td (1055 movl %cr0, %eax) 109.2129 Tj 0 -85.4403 Td (1056 orl $CR0_PE, %eax) 122.3184 Tj 0 -94.9336 Td (1057 movl %eax, %cr0) 109.2129 Tj 0 -104.427 Td (1058 ) 21.8426 Tj 0 -113.9203 Td (1059 # Jump to next instruction, but in 32-bit code segment.) 270.8479 Tj 0 -123.4137 Td (1060 # Switches processor into 32-bit mode.) 196.5831 Tj 0 -132.9071 Td (1061 ljmp $$SEG_KCODE<<3$, $start32) 174.7406 Tj 0 -142.4004 Td (1062 ) 21.8426 Tj 0 -151.8938 Td (1063 .code32 # Assemble for 32-bit mode) 266.4794 Tj 0 -161.3871 Td (1064 start32:) 56.7907 Tj 0 -170.8805 Td (1065 # Set up the protected-mode data segment registers) 249.0053 Tj 0 -180.3739 Td (1066 movw $$SEG_KDATA<<3$, %ax # Our data segment sel\ ector) 288.322 Tj 0 -189.8672 Td (1067 movw %ax, %ds # -> DS: Data Segment) 262.1109 Tj 0 -199.3606 Td (1068 movw %ax, %es # -> ES: Extra Segment) 266.4794 Tj 0 -208.8539 Td (1069 movw %ax, %ss # -> SS: Stack Segment) 266.4794 Tj 0 -218.3473 Td (1070 movw $0, %ax # Zero segments not read\ y for use) 314.533 Tj 0 -227.8407 Td (1071 movw %ax, %fs # -> FS) 200.9517 Tj 0 -237.334 Td (1072 movw %ax, %gs # -> GS) 200.9517 Tj 0 -246.8274 Td (1073 ) 21.8426 Tj 0 -256.3207 Td (1074 # Set up the stack pointer and call into C.) 218.4257 Tj 0 -265.8141 Td (1075 movl start-4, %esp) 122.3184 Tj 0 -275.3075 Td (1076 call) 48.0537 Tj -2507.8 TJm (*$start-8$) 43.6851 Tj 0 -284.8008 Td (1077 ) 21.8426 Tj 0 -294.2942 Td (1078 # If the call returns $it shouldn't$, trigger a Bochs) 262.1109 Tj 0 -303.7875 Td (1079 # breakpoint if running under Bochs, then loop.) 235.8998 Tj 0 -313.2809 Td (1080 movw $0x8a00, %ax # 0x8a00 -> port 0x8a00) 270.8479 Tj 0 -322.7743 Td (1081 movw %ax, %dx) 100.4758 Tj 0 -332.2676 Td (1082 outw %ax, %dx) 100.4758 Tj 0 -341.761 Td (1083 movw $0x8e00, %ax # 0x8e00 -> port 0x8a00) 270.8479 Tj 0 -351.2543 Td (1084 outw %ax, %dx) 100.4758 Tj 0 -360.7477 Td (1085 spin:) 43.6851 Tj 0 -370.2411 Td (1086 jmp spin) 83.0018 Tj 0 -379.7344 Td (1087 ) 21.8426 Tj 0 -389.2278 Td (1088 # Bootstrap GDT) 87.3703 Tj 0 -398.7211 Td (1089 .p2align 2 # force 4 byte a\ lignment) 310.1645 Tj 0 -408.2145 Td (1090 gdt:) 39.3166 Tj 0 -417.7079 Td (1091 SEG_NULLASM # null seg) 249.0053 Tj 0 -427.2012 Td (1092 SEG_ASM$STA_X|STA_R, 0x0, 0xffffffff$ # code seg) 249.0053 Tj 0 -436.6946 Td (1093 SEG_ASM$STA_W, 0x0, 0xffffffff$ # data seg) 249.0053 Tj 0 -446.1879 Td (1094 ) 21.8426 Tj 0 -455.6813 Td (1095 gdtdesc:) 56.7907 Tj 0 -465.1747 Td (1096 .word $gdtdesc - gdt - 1$ \ # sizeof$gdt$ - 1) 345.1126 Tj 0 -474.668 Td (1097 .long gdt # address gdt) 262.1109 Tj 0 -484.1614 Td (1098 ) 21.8426 Tj 0 -493.6547 Td (1099 ) 21.8426 Tj 0 -522.1348 Td (Sheet 10) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 18 18 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/bootmain.c Page 1) 179.1091 Tj 0 -28.4801 Td (1100 // Boot loader.) 87.3703 Tj 0 -37.9735 Td (1101 //) 30.5796 Tj 0 -47.4668 Td (1102 // Part of the boot sector, along with bootasm.S, which ca\ lls bootmain.) 340.7441 Tj 0 -56.9602 Td (1103 // bootasm.S has put the processor into protected 32-bit m\ ode.) 292.6905 Tj 0 -66.4535 Td (1104 // bootmain loads an ELF kernel image from the disk st\ arting at) 305.796 Tj 0 -75.9469 Td (1105 // sector 1 and then jumps to the kernel entry routine.) 262.1109 Tj 0 -85.4403 Td (1106 ) 21.8426 Tj 0 -94.9336 Td (1107 #include "types.h") 100.4758 Tj 0 -104.427 Td (1108 #include "elf.h") 91.7388 Tj 0 -113.9203 Td (1109 #include "x86.h") 91.7388 Tj 0 -123.4137 Td (1110 ) 21.8426 Tj 0 -132.9071 Td (1111 #define SECTSIZE 512) 113.5814 Tj 0 -142.4004 Td (1112 ) 21.8426 Tj 0 -151.8938 Td (1113 void readseg$uchar*, uint, uint$;) 166.0035 Tj 0 -161.3871 Td (1114 ) 21.8426 Tj 0 -170.8805 Td (1115 void) 39.3166 Tj 0 -180.3739 Td (1116 bootmain$void$) 83.0018 Tj 0 -189.8672 Td (1117 {) 26.2111 Tj 0 -199.3606 Td (1118 struct elfhdr *elf;) 113.5814 Tj 0 -208.8539 Td (1119 struct proghdr *ph, *eph;) 139.7925 Tj 0 -218.3473 Td (1120 void $*entry$$void$;) 117.9499 Tj 0 -227.8407 Td (1121 uchar* va;) 74.2647 Tj 0 -237.334 Td (1122 ) 21.8426 Tj 0 -246.8274 Td (1123 elf = $struct elfhdr*$0x10000; // scratch space) 240.2683 Tj 0 -256.3207 Td (1124 ) 21.8426 Tj 0 -265.8141 Td (1125 // Read 1st page off disk) 139.7925 Tj 0 -275.3075 Td (1126 readseg$\(uchar*$elf, 4096, 0\);) 161.635 Tj 0 -284.8008 Td (1127 ) 21.8426 Tj 0 -294.2942 Td (1128 // Is this an ELF executable?) 157.2665 Tj 0 -303.7875 Td (1129 if$elf->magic != ELF_MAGIC$) 148.5295 Tj 0 -313.2809 Td (1130 return; // let bootasm.S handle error) 205.3202 Tj 0 -322.7743 Td (1131 ) 21.8426 Tj 0 -332.2676 Td (1132 // Load each program segment $ignores ph flags$.) 240.2683 Tj 0 -341.761 Td (1133 ph = $struct proghdr*$$\(uchar*$elf + elf->phoff\);) 244.6368 Tj 0 -351.2543 Td (1134 eph = ph + elf->phnum;) 126.6869 Tj 0 -360.7477 Td (1135 for$; ph < eph; ph++$ {) 131.0554 Tj 0 -370.2411 Td (1136 va = $uchar*$$ph->va & 0xFFFFFF$;) 183.4776 Tj 0 -379.7344 Td (1137 readseg$va, ph->filesz, ph->offset$;) 196.5831 Tj 0 -389.2278 Td (1138 if$ph->memsz > ph->filesz$) 152.898 Tj 0 -398.7211 Td (1139 stosb$va + ph->filesz, 0, ph->memsz - ph->filesz$;) 266.4794 Tj 0 -408.2145 Td (1140 }) 34.9481 Tj 0 -417.7079 Td (1141 ) 21.8426 Tj 0 -427.2012 Td (1142 // Call the entry point from the ELF header.) 222.7942 Tj 0 -436.6946 Td (1143 // Does not return!) 113.5814 Tj 0 -446.1879 Td (1144 entry = $void\(*$$void$\)$elf->entry & 0xFFFFFF$;) 235.8998 Tj 0 -455.6813 Td (1145 entry;) 65.5277 Tj 0 -465.1747 Td (1146 }) 26.2111 Tj 0 -474.668 Td (1147 ) 21.8426 Tj 0 -484.1614 Td (1148 ) 21.8426 Tj 0 -493.6547 Td (1149 ) 21.8426 Tj 0 -522.1348 Td (Sheet 11) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/bootmain.c Page 2) 179.1091 Tj 0 -28.4801 Td (1150 void) 39.3166 Tj 0 -37.9735 Td (1151 waitdisk$void$) 83.0018 Tj 0 -47.4668 Td (1152 {) 26.2111 Tj 0 -56.9602 Td (1153 // Wait for disk ready.) 131.0554 Tj 0 -66.4535 Td (1154 while$\(inb\(0x1F7$ & 0xC0\) != 0x40\)) 179.1091 Tj 0 -75.9469 Td (1155 ;) 43.6851 Tj 0 -85.4403 Td (1156 }) 26.2111 Tj 0 -94.9336 Td (1157 ) 21.8426 Tj 0 -104.427 Td (1158 // Read a single sector at offset into dst.) 209.6887 Tj 0 -113.9203 Td (1159 void) 39.3166 Tj 0 -123.4137 Td (1160 readsect$void *dst, uint offset$) 161.635 Tj 0 -132.9071 Td (1161 {) 26.2111 Tj 0 -142.4004 Td (1162 // Issue command.) 104.8443 Tj 0 -151.8938 Td (1163 waitdisk;) 78.6333 Tj 0 -161.3871 Td (1164 outb$0x1F2, 1$; // count = 1) 161.635 Tj 0 -170.8805 Td (1165 outb$0x1F3, offset$;) 117.9499 Tj 0 -180.3739 Td (1166 outb$0x1F4, offset >> 8$;) 139.7925 Tj 0 -189.8672 Td (1167 outb$0x1F5, offset >> 16$;) 144.161 Tj 0 -199.3606 Td (1168 outb$0x1F6, \(offset >> 24$ | 0xE0\);) 183.4776 Tj 0 -208.8539 Td (1169 outb$0x1F7, 0x20$; // cmd 0x20 - read sectors) 231.5313 Tj 0 -218.3473 Td (1170 ) 21.8426 Tj 0 -227.8407 Td (1171 // Read data.) 87.3703 Tj 0 -237.334 Td (1172 waitdisk;) 78.6333 Tj 0 -246.8274 Td (1173 insl$0x1F0, dst, SECTSIZE/4$;) 157.2665 Tj 0 -256.3207 Td (1174 }) 26.2111 Tj 0 -265.8141 Td (1175 ) 21.8426 Tj 0 -275.3075 Td (1176 // Read 'count' bytes at 'offset' from kernel into virtual\ address 'va'.) 336.3756 Tj 0 -284.8008 Td (1177 // Might copy more than asked.) 152.898 Tj 0 -294.2942 Td (1178 void) 39.3166 Tj 0 -303.7875 Td (1179 readseg$uchar* va, uint count, uint offset$) 209.6887 Tj 0 -313.2809 Td (1180 {) 26.2111 Tj 0 -322.7743 Td (1181 uchar* eva;) 78.6333 Tj 0 -332.2676 Td (1182 ) 21.8426 Tj 0 -341.761 Td (1183 eva = va + count;) 104.8443 Tj 0 -351.2543 Td (1184 ) 21.8426 Tj 0 -360.7477 Td (1185 // Round down to sector boundary.) 174.7406 Tj 0 -370.2411 Td (1186 va -= offset % SECTSIZE;) 135.4239 Tj 0 -379.7344 Td (1187 ) 21.8426 Tj 0 -389.2278 Td (1188 // Translate from bytes to sectors; kernel starts at sec\ tor 1.) 301.4275 Tj 0 -398.7211 Td (1189 offset = $offset / SECTSIZE$ + 1;) 174.7406 Tj 0 -408.2145 Td (1190 ) 21.8426 Tj 0 -417.7079 Td (1191 // If this is too slow, we could read lots of sectors at\ a time.) 310.1645 Tj 0 -427.2012 Td (1192 // We'd write more to memory than asked, but it doesn't \ matter --) 314.533 Tj 0 -436.6946 Td (1193 // we load in increasing order.) 166.0035 Tj 0 -446.1879 Td (1194 for$; va < eva; va += SECTSIZE, offset++$) 209.6887 Tj 0 -455.6813 Td (1195 readsect$va, offset$;) 131.0554 Tj 0 -465.1747 Td (1196 }) 26.2111 Tj 0 -474.668 Td (1197 ) 21.8426 Tj 0 -484.1614 Td (1198 ) 21.8426 Tj 0 -493.6547 Td (1199 ) 21.8426 Tj 0 -522.1348 Td (Sheet 11) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 19 19 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/main.c Page 1) 161.635 Tj 0 -28.4801 Td (1200 #include "types.h") 100.4758 Tj 0 -37.9735 Td (1201 #include "defs.h") 96.1073 Tj 0 -47.4668 Td (1202 #include "param.h") 100.4758 Tj 0 -56.9602 Td (1203 #include "mmu.h") 91.7388 Tj 0 -66.4535 Td (1204 #include "proc.h") 96.1073 Tj 0 -75.9469 Td (1205 #include "x86.h") 91.7388 Tj 0 -85.4403 Td (1206 ) 21.8426 Tj 0 -94.9336 Td (1207 static void bootothers$void$;) 148.5295 Tj 0 -104.427 Td (1208 static void mpmain$void$ __attribute__$\(noreturn$\);) 244.6368 Tj 0 -113.9203 Td (1209 ) 21.8426 Tj 0 -123.4137 Td (1210 // Bootstrap processor starts running C code here.) 240.2683 Tj 0 -132.9071 Td (1211 int) 34.9481 Tj 0 -142.4004 Td (1212 main$void$) 65.5277 Tj 0 -151.8938 Td (1213 {) 26.2111 Tj 0 -161.3871 Td (1214 mpinit; // collect info about this machine) 222.7942 Tj 0 -170.8805 Td (1215 lapicinit$mpbcpu\($\);) 117.9499 Tj 0 -180.3739 Td (1216 ksegment;) 78.6333 Tj 0 -189.8672 Td (1217 picinit; // interrupt controller) 205.3202 Tj 0 -199.3606 Td (1218 ioapicinit; // another interrupt controller) 240.2683 Tj 0 -208.8539 Td (1219 consoleinit; // I/O devices & their interrupts) 249.0053 Tj 0 -218.3473 Td (1220 uartinit; // serial port) 166.0035 Tj 0 -227.8407 Td (1221 cprintf$"cpus %p cpu %p\\n", cpus, cpu$;) 192.2146 Tj 0 -237.334 Td (1222 cprintf$"\\ncpu%d: starting xv6\\n\\n", cpu->id$;) 231.5313 Tj 0 -246.8274 Td (1223 ) 21.8426 Tj 0 -256.3207 Td (1224 kinit; // physical memory allocator) 227.1628 Tj 0 -265.8141 Td (1225 pinit; // process table) 174.7406 Tj 0 -275.3075 Td (1226 tvinit; // trap vectors) 170.3721 Tj 0 -284.8008 Td (1227 binit; // buffer cache) 170.3721 Tj 0 -294.2942 Td (1228 fileinit; // file table) 161.635 Tj 0 -303.7875 Td (1229 iinit; // inode cache) 166.0035 Tj 0 -313.2809 Td (1230 ideinit; // disk) 135.4239 Tj 0 -322.7743 Td (1231 if$!ismp$) 69.8962 Tj 0 -332.2676 Td (1232 timerinit; // uniprocessor timer) 196.5831 Tj 0 -341.761 Td (1233 userinit; // first user process) 196.5831 Tj 0 -351.2543 Td (1234 bootothers; // start other processors) 214.0572 Tj 0 -360.7477 Td (1235 ) 21.8426 Tj 0 -370.2411 Td (1236 // Finish setting up this processor in mpmain.) 231.5313 Tj 0 -379.7344 Td (1237 mpmain;) 69.8962 Tj 0 -389.2278 Td (1238 }) 26.2111 Tj 0 -398.7211 Td (1239 ) 21.8426 Tj 0 -408.2145 Td (1240 ) 21.8426 Tj 0 -417.7079 Td (1241 ) 21.8426 Tj 0 -427.2012 Td (1242 ) 21.8426 Tj 0 -436.6946 Td (1243 ) 21.8426 Tj 0 -446.1879 Td (1244 ) 21.8426 Tj 0 -455.6813 Td (1245 ) 21.8426 Tj 0 -465.1747 Td (1246 ) 21.8426 Tj 0 -474.668 Td (1247 ) 21.8426 Tj 0 -484.1614 Td (1248 ) 21.8426 Tj 0 -493.6547 Td (1249 ) 21.8426 Tj 0 -522.1348 Td (Sheet 12) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/main.c Page 2) 161.635 Tj 0 -28.4801 Td (1250 // Bootstrap processor gets here after setting up the hard\ ware.) 297.059 Tj 0 -37.9735 Td (1251 // Additional processors start here.) 179.1091 Tj 0 -47.4668 Td (1252 static void) 69.8962 Tj 0 -56.9602 Td (1253 mpmain$void$) 74.2647 Tj 0 -66.4535 Td (1254 {) 26.2111 Tj 0 -75.9469 Td (1255 if$cpunum\($ != mpbcpu\)) 135.4239 Tj 0 -85.4403 Td (1256 lapicinit$cpunum\($\);) 126.6869 Tj 0 -94.9336 Td (1257 ksegment;) 78.6333 Tj 0 -104.427 Td (1258 cprintf$"cpu%d: mpmain\\n", cpu->id$;) 187.8461 Tj 0 -113.9203 Td (1259 idtinit;) 74.2647 Tj 0 -123.4137 Td (1260 xchg$&cpu->booted, 1$;) 126.6869 Tj 0 -132.9071 Td (1261 ) 21.8426 Tj 0 -142.4004 Td (1262 cprintf$"cpu%d: scheduling\\n", cpu->id$;) 205.3202 Tj 0 -151.8938 Td (1263 scheduler;) 83.0018 Tj 0 -161.3871 Td (1264 }) 26.2111 Tj 0 -170.8805 Td (1265 ) 21.8426 Tj 0 -180.3739 Td (1266 static void) 69.8962 Tj 0 -189.8672 Td (1267 bootothers$void$) 91.7388 Tj 0 -199.3606 Td (1268 {) 26.2111 Tj 0 -208.8539 Td (1269 extern uchar _binary_bootother_start[], _binary_bootothe\ r_size[];) 314.533 Tj 0 -218.3473 Td (1270 uchar *code;) 83.0018 Tj 0 -227.8407 Td (1271 struct cpu *c;) 91.7388 Tj 0 -237.334 Td (1272 char *stack;) 83.0018 Tj 0 -246.8274 Td (1273 ) 21.8426 Tj 0 -256.3207 Td (1274 // Write bootstrap code to unused memory at 0x7000.) 253.3738 Tj 0 -265.8141 Td (1275 code = $uchar*$0x7000;) 126.6869 Tj 0 -275.3075 Td (1276 memmove$code, _binary_bootother_start, \(uint$_binary_\ bootother_size\);) 332.0071 Tj 0 -284.8008 Td (1277 ) 21.8426 Tj 0 -294.2942 Td (1278 for$c = cpus; c < cpus+ncpu; c++${) 179.1091 Tj 0 -303.7875 Td (1279 if$c == cpus+cpunum\($\) // We've started already.) 253.3738 Tj 0 -313.2809 Td (1280 continue;) 87.3703 Tj 0 -322.7743 Td (1281 ) 21.8426 Tj 0 -332.2676 Td (1282 // Fill in %esp, %eip and start code on cpu.) 231.5313 Tj 0 -341.761 Td (1283 stack = kalloc$KSTACKSIZE$;) 157.2665 Tj 0 -351.2543 Td (1284 *$void**$$code-4$ = stack + KSTACKSIZE;) 209.6887 Tj 0 -360.7477 Td (1285 *$void**$$code-8$ = mpmain;) 157.2665 Tj 0 -370.2411 Td (1286 lapicstartap$c->id, \(uint$code\);) 179.1091 Tj 0 -379.7344 Td (1287 ) 21.8426 Tj 0 -389.2278 Td (1288 // Wait for cpu to get through bootstrap.) 218.4257 Tj 0 -398.7211 Td (1289 while$c->booted == 0$) 131.0554 Tj 0 -408.2145 Td (1290 ;) 52.4222 Tj 0 -417.7079 Td (1291 }) 34.9481 Tj 0 -427.2012 Td (1292 }) 26.2111 Tj 0 -436.6946 Td (1293 ) 21.8426 Tj 0 -446.1879 Td (1294 ) 21.8426 Tj 0 -455.6813 Td (1295 ) 21.8426 Tj 0 -465.1747 Td (1296 ) 21.8426 Tj 0 -474.668 Td (1297 ) 21.8426 Tj 0 -484.1614 Td (1298 ) 21.8426 Tj 0 -493.6547 Td (1299 ) 21.8426 Tj 0 -522.1348 Td (Sheet 12) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 20 20 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/spinlock.h Page 1) 179.1091 Tj 0 -28.4801 Td (1300 // Mutual exclusion lock.) 131.0554 Tj 0 -37.9735 Td (1301 struct spinlock {) 96.1073 Tj 0 -47.4668 Td (1302 uint locked; // Is the lock held?) 200.9517 Tj 0 -56.9602 Td (1303 ) 21.8426 Tj 0 -66.4535 Td (1304 // For debugging:) 104.8443 Tj 0 -75.9469 Td (1305 char *name; // Name of lock.) 183.4776 Tj 0 -85.4403 Td (1306 struct cpu *cpu; // The cpu holding the lock.) 235.8998 Tj 0 -94.9336 Td (1307 uint pcs[10]; // The call stack $an array of progr\ am counters$) 323.2701 Tj 0 -104.427 Td (1308 // that locked the lock.) 218.4257 Tj 0 -113.9203 Td (1309 };) 30.5796 Tj 0 -123.4137 Td (1310 ) 21.8426 Tj 0 -132.9071 Td (1311 ) 21.8426 Tj 0 -142.4004 Td (1312 ) 21.8426 Tj 0 -151.8938 Td (1313 ) 21.8426 Tj 0 -161.3871 Td (1314 ) 21.8426 Tj 0 -170.8805 Td (1315 ) 21.8426 Tj 0 -180.3739 Td (1316 ) 21.8426 Tj 0 -189.8672 Td (1317 ) 21.8426 Tj 0 -199.3606 Td (1318 ) 21.8426 Tj 0 -208.8539 Td (1319 ) 21.8426 Tj 0 -218.3473 Td (1320 ) 21.8426 Tj 0 -227.8407 Td (1321 ) 21.8426 Tj 0 -237.334 Td (1322 ) 21.8426 Tj 0 -246.8274 Td (1323 ) 21.8426 Tj 0 -256.3207 Td (1324 ) 21.8426 Tj 0 -265.8141 Td (1325 ) 21.8426 Tj 0 -275.3075 Td (1326 ) 21.8426 Tj 0 -284.8008 Td (1327 ) 21.8426 Tj 0 -294.2942 Td (1328 ) 21.8426 Tj 0 -303.7875 Td (1329 ) 21.8426 Tj 0 -313.2809 Td (1330 ) 21.8426 Tj 0 -322.7743 Td (1331 ) 21.8426 Tj 0 -332.2676 Td (1332 ) 21.8426 Tj 0 -341.761 Td (1333 ) 21.8426 Tj 0 -351.2543 Td (1334 ) 21.8426 Tj 0 -360.7477 Td (1335 ) 21.8426 Tj 0 -370.2411 Td (1336 ) 21.8426 Tj 0 -379.7344 Td (1337 ) 21.8426 Tj 0 -389.2278 Td (1338 ) 21.8426 Tj 0 -398.7211 Td (1339 ) 21.8426 Tj 0 -408.2145 Td (1340 ) 21.8426 Tj 0 -417.7079 Td (1341 ) 21.8426 Tj 0 -427.2012 Td (1342 ) 21.8426 Tj 0 -436.6946 Td (1343 ) 21.8426 Tj 0 -446.1879 Td (1344 ) 21.8426 Tj 0 -455.6813 Td (1345 ) 21.8426 Tj 0 -465.1747 Td (1346 ) 21.8426 Tj 0 -474.668 Td (1347 ) 21.8426 Tj 0 -484.1614 Td (1348 ) 21.8426 Tj 0 -493.6547 Td (1349 ) 21.8426 Tj 0 -522.1348 Td (Sheet 13) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/spinlock.c Page 1) 179.1091 Tj 0 -28.4801 Td (1350 // Mutual exclusion spin locks.) 157.2665 Tj 0 -37.9735 Td (1351 ) 21.8426 Tj 0 -47.4668 Td (1352 #include "types.h") 100.4758 Tj 0 -56.9602 Td (1353 #include "defs.h") 96.1073 Tj 0 -66.4535 Td (1354 #include "param.h") 100.4758 Tj 0 -75.9469 Td (1355 #include "x86.h") 91.7388 Tj 0 -85.4403 Td (1356 #include "mmu.h") 91.7388 Tj 0 -94.9336 Td (1357 #include "proc.h") 96.1073 Tj 0 -104.427 Td (1358 #include "spinlock.h") 113.5814 Tj 0 -113.9203 Td (1359 ) 21.8426 Tj 0 -123.4137 Td (1360 void) 39.3166 Tj 0 -132.9071 Td (1361 initlock$struct spinlock *lk, char *name$) 200.9517 Tj 0 -142.4004 Td (1362 {) 26.2111 Tj 0 -151.8938 Td (1363 lk->name = name;) 100.4758 Tj 0 -161.3871 Td (1364 lk->locked = 0;) 96.1073 Tj 0 -170.8805 Td (1365 lk->cpu = 0;) 83.0018 Tj 0 -180.3739 Td (1366 }) 26.2111 Tj 0 -189.8672 Td (1367 ) 21.8426 Tj 0 -199.3606 Td (1368 // Acquire the lock.) 109.2129 Tj 0 -208.8539 Td (1369 // Loops $spins$ until the lock is acquired.) 214.0572 Tj 0 -218.3473 Td (1370 // Holding a lock for a long time may cause) 209.6887 Tj 0 -227.8407 Td (1371 // other CPUs to waste time spinning to acquire it.) 244.6368 Tj 0 -237.334 Td (1372 void) 39.3166 Tj 0 -246.8274 Td (1373 acquire$struct spinlock *lk$) 144.161 Tj 0 -256.3207 Td (1374 {) 26.2111 Tj 0 -265.8141 Td (1375 pushcli;) 74.2647 Tj 0 -275.3075 Td (1376 if$holding\(lk$\)) 96.1073 Tj 0 -284.8008 Td (1377 panic$"acquire"$;) 113.5814 Tj 0 -294.2942 Td (1378 ) 21.8426 Tj 0 -303.7875 Td (1379 // The xchg is atomic.) 126.6869 Tj 0 -313.2809 Td (1380 // It also serializes, so that reads after acquire are n\ ot) 283.9534 Tj 0 -322.7743 Td (1381 // reordered before it.) 131.0554 Tj 0 -332.2676 Td (1382 while$xchg\(&lk->locked, 1$ != 0\)) 170.3721 Tj 0 -341.761 Td (1383 ;) 43.6851 Tj 0 -351.2543 Td (1384 ) 21.8426 Tj 0 -360.7477 Td (1385 // Record info about lock acquisition for debugging.) 257.7424 Tj 0 -370.2411 Td (1386 lk->cpu = cpu;) 91.7388 Tj 0 -379.7344 Td (1387 getcallerpcs$&lk, lk->pcs$;) 148.5295 Tj 0 -389.2278 Td (1388 }) 26.2111 Tj 0 -398.7211 Td (1389 ) 21.8426 Tj 0 -408.2145 Td (1390 ) 21.8426 Tj 0 -417.7079 Td (1391 ) 21.8426 Tj 0 -427.2012 Td (1392 ) 21.8426 Tj 0 -436.6946 Td (1393 ) 21.8426 Tj 0 -446.1879 Td (1394 ) 21.8426 Tj 0 -455.6813 Td (1395 ) 21.8426 Tj 0 -465.1747 Td (1396 ) 21.8426 Tj 0 -474.668 Td (1397 ) 21.8426 Tj 0 -484.1614 Td (1398 ) 21.8426 Tj 0 -493.6547 Td (1399 ) 21.8426 Tj 0 -522.1348 Td (Sheet 13) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 21 21 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/spinlock.c Page 2) 179.1091 Tj 0 -28.4801 Td (1400 // Release the lock.) 109.2129 Tj 0 -37.9735 Td (1401 void) 39.3166 Tj 0 -47.4668 Td (1402 release$struct spinlock *lk$) 144.161 Tj 0 -56.9602 Td (1403 {) 26.2111 Tj 0 -66.4535 Td (1404 if$!holding\(lk$\)) 100.4758 Tj 0 -75.9469 Td (1405 panic$"release"$;) 113.5814 Tj 0 -85.4403 Td (1406 ) 21.8426 Tj 0 -94.9336 Td (1407 lk->pcs[0] = 0;) 96.1073 Tj 0 -104.427 Td (1408 lk->cpu = 0;) 83.0018 Tj 0 -113.9203 Td (1409 ) 21.8426 Tj 0 -123.4137 Td (1410 // The xchg serializes, so that reads before release are) 275.2164 Tj 0 -132.9071 Td (1411 // not reordered after it. The 1996 PentiumPro manual $\ Volume 3,) 314.533 Tj 0 -142.4004 Td (1412 // 7.2$ says reads can be carried out speculatively and\ in) 283.9534 Tj 0 -151.8938 Td (1413 // any order, which implies we need to serialize here.) 266.4794 Tj 0 -161.3871 Td (1414 // But the 2007 Intel 64 Architecture Memory Ordering Wh\ ite) 288.322 Tj 0 -170.8805 Td (1415 // Paper says that Intel 64 and IA-32 will not move a lo\ ad) 283.9534 Tj 0 -180.3739 Td (1416 // after a store. So lock->locked = 0 would work here.) 266.4794 Tj 0 -189.8672 Td (1417 // The xchg being asm volatile ensures gcc emits it afte\ r) 279.5849 Tj 0 -199.3606 Td (1418 // the above assignments $and after the critical sectio\ n$.) 283.9534 Tj 0 -208.8539 Td (1419 xchg$&lk->locked, 0$;) 122.3184 Tj 0 -218.3473 Td (1420 ) 21.8426 Tj 0 -227.8407 Td (1421 popcli;) 69.8962 Tj 0 -237.334 Td (1422 }) 26.2111 Tj 0 -246.8274 Td (1423 ) 21.8426 Tj 0 -256.3207 Td (1424 // Record the current call stack in pcs[] by following the\ %ebp chain.) 327.6386 Tj 0 -265.8141 Td (1425 void) 39.3166 Tj 0 -275.3075 Td (1426 getcallerpcs$void *v, uint pcs[]$) 166.0035 Tj 0 -284.8008 Td (1427 {) 26.2111 Tj 0 -294.2942 Td (1428 uint *ebp;) 74.2647 Tj 0 -303.7875 Td (1429 int i;) 56.7907 Tj 0 -313.2809 Td (1430 ) 21.8426 Tj 0 -322.7743 Td (1431 ebp = $uint*$v - 2;) 113.5814 Tj 0 -332.2676 Td (1432 for$i = 0; i < 10; i++${) 135.4239 Tj 0 -341.761 Td (1433 if$ebp == 0 || ebp == \(uint*$0xffffffff\)) 214.0572 Tj 0 -351.2543 Td (1434 break;) 74.2647 Tj 0 -360.7477 Td (1435 pcs[i] = ebp[1]; // saved %eip) 187.8461 Tj 0 -370.2411 Td (1436 ebp = $uint*$ebp[0]; // saved %ebp) 187.8461 Tj 0 -379.7344 Td (1437 }) 34.9481 Tj 0 -389.2278 Td (1438 for$; i < 10; i++$) 109.2129 Tj 0 -398.7211 Td (1439 pcs[i] = 0;) 87.3703 Tj 0 -408.2145 Td (1440 }) 26.2111 Tj 0 -417.7079 Td (1441 ) 21.8426 Tj 0 -427.2012 Td (1442 // Check whether this cpu is holding the lock.) 222.7942 Tj 0 -436.6946 Td (1443 int) 34.9481 Tj 0 -446.1879 Td (1444 holding$struct spinlock *lock$) 152.898 Tj 0 -455.6813 Td (1445 {) 26.2111 Tj 0 -465.1747 Td (1446 return lock->locked && lock->cpu == cpu;) 205.3202 Tj 0 -474.668 Td (1447 }) 26.2111 Tj 0 -484.1614 Td (1448 ) 21.8426 Tj 0 -493.6547 Td (1449 ) 21.8426 Tj 0 -522.1348 Td (Sheet 14) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/spinlock.c Page 3) 179.1091 Tj 0 -28.4801 Td (1450 // Pushcli/popcli are like cli/sti except that they are ma\ tched:) 301.4275 Tj 0 -37.9735 Td (1451 // it takes two popcli to undo two pushcli. Also, if inte\ rrupts) 301.4275 Tj 0 -47.4668 Td (1452 // are off, then pushcli, popcli leaves them off.) 235.8998 Tj 0 -56.9602 Td (1453 ) 21.8426 Tj 0 -66.4535 Td (1454 void) 39.3166 Tj 0 -75.9469 Td (1455 pushcli$void$) 78.6333 Tj 0 -85.4403 Td (1456 {) 26.2111 Tj 0 -94.9336 Td (1457 int eflags;) 78.6333 Tj 0 -104.427 Td (1458 ) 21.8426 Tj 0 -113.9203 Td (1459 eflags = readeflags;) 126.6869 Tj 0 -123.4137 Td (1460 cli;) 56.7907 Tj 0 -132.9071 Td (1461 if$cpu->ncli++ == 0$) 117.9499 Tj 0 -142.4004 Td (1462 cpu->intena = eflags & FL_IF;) 166.0035 Tj 0 -151.8938 Td (1463 }) 26.2111 Tj 0 -161.3871 Td (1464 ) 21.8426 Tj 0 -170.8805 Td (1465 void) 39.3166 Tj 0 -180.3739 Td (1466 popcli$void$) 74.2647 Tj 0 -189.8672 Td (1467 {) 26.2111 Tj 0 -199.3606 Td (1468 if$readeflags\($&FL_IF\)) 126.6869 Tj 0 -208.8539 Td (1469 panic$"popcli - interruptible"$;) 179.1091 Tj 0 -218.3473 Td (1470 if$--cpu->ncli < 0$) 113.5814 Tj 0 -227.8407 Td (1471 panic$"popcli"$;) 109.2129 Tj 0 -237.334 Td (1472 if$cpu->ncli == 0 && cpu->intena$) 174.7406 Tj 0 -246.8274 Td (1473 sti;) 65.5277 Tj 0 -256.3207 Td (1474 }) 26.2111 Tj 0 -265.8141 Td (1475 ) 21.8426 Tj 0 -275.3075 Td (1476 ) 21.8426 Tj 0 -284.8008 Td (1477 ) 21.8426 Tj 0 -294.2942 Td (1478 ) 21.8426 Tj 0 -303.7875 Td (1479 ) 21.8426 Tj 0 -313.2809 Td (1480 ) 21.8426 Tj 0 -322.7743 Td (1481 ) 21.8426 Tj 0 -332.2676 Td (1482 ) 21.8426 Tj 0 -341.761 Td (1483 ) 21.8426 Tj 0 -351.2543 Td (1484 ) 21.8426 Tj 0 -360.7477 Td (1485 ) 21.8426 Tj 0 -370.2411 Td (1486 ) 21.8426 Tj 0 -379.7344 Td (1487 ) 21.8426 Tj 0 -389.2278 Td (1488 ) 21.8426 Tj 0 -398.7211 Td (1489 ) 21.8426 Tj 0 -408.2145 Td (1490 ) 21.8426 Tj 0 -417.7079 Td (1491 ) 21.8426 Tj 0 -427.2012 Td (1492 ) 21.8426 Tj 0 -436.6946 Td (1493 ) 21.8426 Tj 0 -446.1879 Td (1494 ) 21.8426 Tj 0 -455.6813 Td (1495 ) 21.8426 Tj 0 -465.1747 Td (1496 ) 21.8426 Tj 0 -474.668 Td (1497 ) 21.8426 Tj 0 -484.1614 Td (1498 ) 21.8426 Tj 0 -493.6547 Td (1499 ) 21.8426 Tj 0 -522.1348 Td (Sheet 14) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 22 22 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/proc.h Page 1) 161.635 Tj 0 -28.4801 Td (1500 // Segments in proc->gdt.) 131.0554 Tj 0 -37.9735 Td (1501 // Also known to bootasm.S and trapasm.S) 196.5831 Tj 0 -47.4668 Td (1502 #define SEG_KCODE 1 // kernel code) 174.7406 Tj 0 -56.9602 Td (1503 #define SEG_KDATA 2 // kernel data+stack) 200.9517 Tj 0 -66.4535 Td (1504 #define SEG_KCPU 3 // kernel per-cpu data) 209.6887 Tj 0 -75.9469 Td (1505 #define SEG_UCODE 4) 104.8443 Tj 0 -85.4403 Td (1506 #define SEG_UDATA 5) 104.8443 Tj 0 -94.9336 Td (1507 #define SEG_TSS 6 // this process's task state) 235.8998 Tj 0 -104.427 Td (1508 #define NSEGS 7) 104.8443 Tj 0 -113.9203 Td (1509 ) 21.8426 Tj 0 -123.4137 Td (1510 // Saved registers for kernel context switches.) 227.1628 Tj 0 -132.9071 Td (1511 // Don't need to save all the segment registers $%cs, etc\ $,) 279.5849 Tj 0 -142.4004 Td (1512 // because they are constant across kernel contexts.) 249.0053 Tj 0 -151.8938 Td (1513 // Don't need to save %eax, %ecx, %edx, because the) 244.6368 Tj 0 -161.3871 Td (1514 // x86 convention is that the caller has saved them.) 249.0053 Tj 0 -170.8805 Td (1515 // Contexts are stored at the bottom of the stack they) 257.7424 Tj 0 -180.3739 Td (1516 // describe; the stack pointer is the address of the conte\ xt.) 288.322 Tj 0 -189.8672 Td (1517 // The layout of the context must match the code in swtch.\ S.) 283.9534 Tj 0 -199.3606 Td (1518 struct context {) 91.7388 Tj 0 -208.8539 Td (1519 uint edi;) 69.8962 Tj 0 -218.3473 Td (1520 uint esi;) 69.8962 Tj 0 -227.8407 Td (1521 uint ebx;) 69.8962 Tj 0 -237.334 Td (1522 uint ebp;) 69.8962 Tj 0 -246.8274 Td (1523 uint eip;) 69.8962 Tj 0 -256.3207 Td (1524 };) 30.5796 Tj 0 -265.8141 Td (1525 ) 21.8426 Tj 0 -275.3075 Td (1526 enum procstate { UNUSED, EMBRYO, SLEEPING, RUNNABLE, RUNNI\ NG, ZOMBIE };) 332.0071 Tj 0 -284.8008 Td (1527 ) 21.8426 Tj 0 -294.2942 Td (1528 // Per-process state) 109.2129 Tj 0 -303.7875 Td (1529 struct proc {) 78.6333 Tj 0 -313.2809 Td (1530 char *mem; // Start of process memory \ $kernel address$) 345.1126 Tj 0 -322.7743 Td (1531 uint sz; // Size of process memory $\ bytes$) 301.4275 Tj 0 -332.2676 Td (1532 char *kstack; // Bottom of kernel stack f\ or this process) 340.7441 Tj 0 -341.761 Td (1533 enum procstate state; // Process state) 227.1628 Tj 0 -351.2543 Td (1534 volatile int pid; // Process ID) 214.0572 Tj 0 -360.7477 Td (1535 struct proc *parent; // Parent process) 231.5313 Tj 0 -370.2411 Td (1536 struct trapframe *tf; // Trap frame for current s\ yscall) 301.4275 Tj 0 -379.7344 Td (1537 struct context *context; // Switch here to run proce\ ss) 283.9534 Tj 0 -389.2278 Td (1538 void *chan; // If non-zero, sleeping on\ chan) 297.059 Tj 0 -398.7211 Td (1539 int killed; // If non-zero, have been k\ illed) 297.059 Tj 0 -408.2145 Td (1540 struct file *ofile[NOFILE]; // Open files) 214.0572 Tj 0 -417.7079 Td (1541 struct inode *cwd; // Current directory) 244.6368 Tj 0 -427.2012 Td (1542 char name[16]; // Process name $debugging\ $) 275.2164 Tj 0 -436.6946 Td (1543 };) 30.5796 Tj 0 -446.1879 Td (1544 ) 21.8426 Tj 0 -455.6813 Td (1545 ) 21.8426 Tj 0 -465.1747 Td (1546 ) 21.8426 Tj 0 -474.668 Td (1547 ) 21.8426 Tj 0 -484.1614 Td (1548 ) 21.8426 Tj 0 -493.6547 Td (1549 ) 21.8426 Tj 0 -522.1348 Td (Sheet 15) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/proc.h Page 2) 161.635 Tj 0 -28.4801 Td (1550 // Process memory is laid out contiguously, low addresses \ first:) 301.4275 Tj 0 -37.9735 Td (1551 // text) 61.1592 Tj 0 -47.4668 Td (1552 // original data and bss) 135.4239 Tj 0 -56.9602 Td (1553 // fixed-size stack) 113.5814 Tj 0 -66.4535 Td (1554 // expandable heap) 109.2129 Tj 0 -75.9469 Td (1555 ) 21.8426 Tj 0 -85.4403 Td (1556 // Per-CPU state) 91.7388 Tj 0 -94.9336 Td (1557 struct cpu {) 74.2647 Tj 0 -104.427 Td (1558 uchar id; // Local APIC ID; index int\ o cpus[] below) 336.3756 Tj 0 -113.9203 Td (1559 struct context *scheduler; // Switch here to enter sch\ eduler) 301.4275 Tj 0 -123.4137 Td (1560 struct taskstate ts; // Used by x86 to find stac\ k for interrupt) 340.7441 Tj 0 -132.9071 Td (1561 struct segdesc gdt[NSEGS]; // x86 global descriptor ta\ ble) 288.322 Tj 0 -142.4004 Td (1562 volatile uint booted; // Has the CPU started?) 257.7424 Tj 0 -151.8938 Td (1563 int ncli; // Depth of pushcli nesting\ .) 279.5849 Tj 0 -161.3871 Td (1564 int intena; // Were interrupts enabled \ before pushcli?) 340.7441 Tj 0 -170.8805 Td (1565 ) 21.8426 Tj 0 -180.3739 Td (1566 // Cpu-local storage variables; see below) 209.6887 Tj 0 -189.8672 Td (1567 struct cpu *cpu;) 100.4758 Tj 0 -199.3606 Td (1568 struct proc *proc;) 109.2129 Tj 0 -208.8539 Td (1569 };) 30.5796 Tj 0 -218.3473 Td (1570 ) 21.8426 Tj 0 -227.8407 Td (1571 extern struct cpu cpus[NCPU];) 148.5295 Tj 0 -237.334 Td (1572 extern int ncpu;) 91.7388 Tj 0 -246.8274 Td (1573 ) 21.8426 Tj 0 -256.3207 Td (1574 // Per-CPU variables, holding pointers to the) 218.4257 Tj 0 -265.8141 Td (1575 // current cpu and to the current process.) 205.3202 Tj 0 -275.3075 Td (1576 // The asm suffix tells gcc to use "%gs:0" to refer to cpu) 275.2164 Tj 0 -284.8008 Td (1577 // and "%gs:4" to refer to proc. ksegment sets up the) 257.7424 Tj 0 -294.2942 Td (1578 // %gs segment register so that %gs refers to the memory) 266.4794 Tj 0 -303.7875 Td (1579 // holding those two variables in the local cpu's struct c\ pu.) 288.322 Tj 0 -313.2809 Td (1580 // This is similar to how thread-local variables are imple\ mented) 301.4275 Tj 0 -322.7743 Td (1581 // in thread libraries such as Linux pthreads.) 222.7942 Tj 0 -332.2676 Td (1582 extern struct cpu *cpu asm$"%gs:0"$; // This cpu.) 262.1109 Tj 0 -341.761 Td (1583 extern struct proc *proc asm$"%gs:4"$; // Current pr\ oc on this cpu.) 332.0071 Tj 0 -351.2543 Td (1584 ) 21.8426 Tj 0 -360.7477 Td (1585 ) 21.8426 Tj 0 -370.2411 Td (1586 ) 21.8426 Tj 0 -379.7344 Td (1587 ) 21.8426 Tj 0 -389.2278 Td (1588 ) 21.8426 Tj 0 -398.7211 Td (1589 ) 21.8426 Tj 0 -408.2145 Td (1590 ) 21.8426 Tj 0 -417.7079 Td (1591 ) 21.8426 Tj 0 -427.2012 Td (1592 ) 21.8426 Tj 0 -436.6946 Td (1593 ) 21.8426 Tj 0 -446.1879 Td (1594 ) 21.8426 Tj 0 -455.6813 Td (1595 ) 21.8426 Tj 0 -465.1747 Td (1596 ) 21.8426 Tj 0 -474.668 Td (1597 ) 21.8426 Tj 0 -484.1614 Td (1598 ) 21.8426 Tj 0 -493.6547 Td (1599 ) 21.8426 Tj 0 -522.1348 Td (Sheet 15) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 23 23 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/proc.c Page 1) 161.635 Tj 0 -28.4801 Td (1600 #include "types.h") 100.4758 Tj 0 -37.9735 Td (1601 #include "defs.h") 96.1073 Tj 0 -47.4668 Td (1602 #include "param.h") 100.4758 Tj 0 -56.9602 Td (1603 #include "mmu.h") 91.7388 Tj 0 -66.4535 Td (1604 #include "x86.h") 91.7388 Tj 0 -75.9469 Td (1605 #include "proc.h") 96.1073 Tj 0 -85.4403 Td (1606 #include "spinlock.h") 113.5814 Tj 0 -94.9336 Td (1607 ) 21.8426 Tj 0 -104.427 Td (1608 struct {) 56.7907 Tj 0 -113.9203 Td (1609 struct spinlock lock;) 122.3184 Tj 0 -123.4137 Td (1610 struct proc proc[NPROC];) 135.4239 Tj 0 -132.9071 Td (1611 } ptable;) 61.1592 Tj 0 -142.4004 Td (1612 ) 21.8426 Tj 0 -151.8938 Td (1613 static struct proc *initproc;) 148.5295 Tj 0 -161.3871 Td (1614 ) 21.8426 Tj 0 -170.8805 Td (1615 int nextpid = 1;) 91.7388 Tj 0 -180.3739 Td (1616 extern void forkret$void$;) 135.4239 Tj 0 -189.8672 Td (1617 extern void trapret$void$;) 135.4239 Tj 0 -199.3606 Td (1618 ) 21.8426 Tj 0 -208.8539 Td (1619 void) 39.3166 Tj 0 -218.3473 Td (1620 pinit$void$) 69.8962 Tj 0 -227.8407 Td (1621 {) 26.2111 Tj 0 -237.334 Td (1622 initlock$&ptable.lock, "ptable"$;) 174.7406 Tj 0 -246.8274 Td (1623 }) 26.2111 Tj 0 -256.3207 Td (1624 ) 21.8426 Tj 0 -265.8141 Td (1625 ) 21.8426 Tj 0 -275.3075 Td (1626 ) 21.8426 Tj 0 -284.8008 Td (1627 ) 21.8426 Tj 0 -294.2942 Td (1628 ) 21.8426 Tj 0 -303.7875 Td (1629 ) 21.8426 Tj 0 -313.2809 Td (1630 ) 21.8426 Tj 0 -322.7743 Td (1631 ) 21.8426 Tj 0 -332.2676 Td (1632 ) 21.8426 Tj 0 -341.761 Td (1633 ) 21.8426 Tj 0 -351.2543 Td (1634 ) 21.8426 Tj 0 -360.7477 Td (1635 ) 21.8426 Tj 0 -370.2411 Td (1636 ) 21.8426 Tj 0 -379.7344 Td (1637 ) 21.8426 Tj 0 -389.2278 Td (1638 ) 21.8426 Tj 0 -398.7211 Td (1639 ) 21.8426 Tj 0 -408.2145 Td (1640 ) 21.8426 Tj 0 -417.7079 Td (1641 ) 21.8426 Tj 0 -427.2012 Td (1642 ) 21.8426 Tj 0 -436.6946 Td (1643 ) 21.8426 Tj 0 -446.1879 Td (1644 ) 21.8426 Tj 0 -455.6813 Td (1645 ) 21.8426 Tj 0 -465.1747 Td (1646 ) 21.8426 Tj 0 -474.668 Td (1647 ) 21.8426 Tj 0 -484.1614 Td (1648 ) 21.8426 Tj 0 -493.6547 Td (1649 ) 21.8426 Tj 0 -522.1348 Td (Sheet 16) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/proc.c Page 2) 161.635 Tj 0 -28.4801 Td (1650 // Print a process listing to console. For debugging.) 257.7424 Tj 0 -37.9735 Td (1651 // Runs when user types ^P on console.) 187.8461 Tj 0 -47.4668 Td (1652 // No lock to avoid wedging a stuck machine further.) 249.0053 Tj 0 -56.9602 Td (1653 void) 39.3166 Tj 0 -66.4535 Td (1654 procdump$void$) 83.0018 Tj 0 -75.9469 Td (1655 {) 26.2111 Tj 0 -85.4403 Td (1656 static char *states[] = {) 139.7925 Tj 0 -94.9336 Td (1657 [UNUSED] "unused",) 122.3184 Tj 0 -104.427 Td (1658 [EMBRYO] "embryo",) 122.3184 Tj 0 -113.9203 Td (1659 [SLEEPING] "sleep ",) 122.3184 Tj 0 -123.4137 Td (1660 [RUNNABLE] "runble",) 122.3184 Tj 0 -132.9071 Td (1661 [RUNNING] "run ",) 122.3184 Tj 0 -142.4004 Td (1662 [ZOMBIE] "zombie") 117.9499 Tj 0 -151.8938 Td (1663 };) 39.3166 Tj 0 -161.3871 Td (1664 int i;) 56.7907 Tj 0 -170.8805 Td (1665 struct proc *p;) 96.1073 Tj 0 -180.3739 Td (1666 char *state;) 83.0018 Tj 0 -189.8672 Td (1667 uint pc[10];) 83.0018 Tj 0 -199.3606 Td (1668 ) 21.8426 Tj 0 -208.8539 Td (1669 for$p = ptable.proc; p < &ptable.proc[NPROC]; p++${) 253.3738 Tj 0 -218.3473 Td (1670 if$p->state == UNUSED$) 135.4239 Tj 0 -227.8407 Td (1671 continue;) 87.3703 Tj 0 -237.334 Td (1672 if$p->state >= 0 && p->state < NELEM\(states$ && sta\ tes[p->state]\)) 323.2701 Tj 0 -246.8274 Td (1673 state = states[p->state];) 157.2665 Tj 0 -256.3207 Td (1674 else) 56.7907 Tj 0 -265.8141 Td (1675 state = "???";) 109.2129 Tj 0 -275.3075 Td (1676 cprintf$"%d %s %s", p->pid, state, p->name$;) 231.5313 Tj 0 -284.8008 Td (1677 if$p->state == SLEEPING${) 148.5295 Tj 0 -294.2942 Td (1678 getcallerpcs$\(uint*$p->context->ebp+2, pc\);) 235.8998 Tj 0 -303.7875 Td (1679 for$i=0; i<10 && pc[i] != 0; i++$) 192.2146 Tj 0 -313.2809 Td (1680 cprintf$" %p", pc[i]$;) 152.898 Tj 0 -322.7743 Td (1681 }) 43.6851 Tj 0 -332.2676 Td (1682 cprintf$"\\n"$;) 100.4758 Tj 0 -341.761 Td (1683 }) 34.9481 Tj 0 -351.2543 Td (1684 }) 26.2111 Tj 0 -360.7477 Td (1685 ) 21.8426 Tj 0 -370.2411 Td (1686 ) 21.8426 Tj 0 -379.7344 Td (1687 ) 21.8426 Tj 0 -389.2278 Td (1688 ) 21.8426 Tj 0 -398.7211 Td (1689 ) 21.8426 Tj 0 -408.2145 Td (1690 ) 21.8426 Tj 0 -417.7079 Td (1691 ) 21.8426 Tj 0 -427.2012 Td (1692 ) 21.8426 Tj 0 -436.6946 Td (1693 ) 21.8426 Tj 0 -446.1879 Td (1694 ) 21.8426 Tj 0 -455.6813 Td (1695 ) 21.8426 Tj 0 -465.1747 Td (1696 ) 21.8426 Tj 0 -474.668 Td (1697 ) 21.8426 Tj 0 -484.1614 Td (1698 ) 21.8426 Tj 0 -493.6547 Td (1699 ) 21.8426 Tj 0 -522.1348 Td (Sheet 16) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 24 24 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/proc.c Page 3) 161.635 Tj 0 -28.4801 Td (1700 // Set up CPU's kernel segment descriptors.) 209.6887 Tj 0 -37.9735 Td (1701 // Run once at boot time on each CPU.) 183.4776 Tj 0 -47.4668 Td (1702 void) 39.3166 Tj 0 -56.9602 Td (1703 ksegment$void$) 83.0018 Tj 0 -66.4535 Td (1704 {) 26.2111 Tj 0 -75.9469 Td (1705 struct cpu *c;) 91.7388 Tj 0 -85.4403 Td (1706 ) 21.8426 Tj 0 -94.9336 Td (1707 c = &cpus[cpunum];) 117.9499 Tj 0 -104.427 Td (1708 c->gdt[SEG_KCODE] = SEG$STA_X|STA_R, 0, 0x100000 + 64*1\ 024-1, 0$;) 314.533 Tj 0 -113.9203 Td (1709 c->gdt[SEG_KDATA] = SEG$STA_W, 0, 0xffffffff, 0$;) 244.6368 Tj 0 -123.4137 Td (1710 c->gdt[SEG_KCPU] = SEG$STA_W, &c->cpu, 8, 0$;) 227.1628 Tj 0 -132.9071 Td (1711 lgdt$c->gdt, sizeof\(c->gdt$\);) 157.2665 Tj 0 -142.4004 Td (1712 loadgs$SEG_KCPU << 3$;) 126.6869 Tj 0 -151.8938 Td (1713 ) 21.8426 Tj 0 -161.3871 Td (1714 // Initialize cpu-local storage.) 170.3721 Tj 0 -170.8805 Td (1715 cpu = c;) 65.5277 Tj 0 -180.3739 Td (1716 proc = 0;) 69.8962 Tj 0 -189.8672 Td (1717 }) 26.2111 Tj 0 -199.3606 Td (1718 ) 21.8426 Tj 0 -208.8539 Td (1719 // Set up CPU's segment descriptors and current process ta\ sk state.) 314.533 Tj 0 -218.3473 Td (1720 void) 39.3166 Tj 0 -227.8407 Td (1721 usegment$void$) 83.0018 Tj 0 -237.334 Td (1722 {) 26.2111 Tj 0 -246.8274 Td (1723 pushcli;) 74.2647 Tj 0 -256.3207 Td (1724 cpu->gdt[SEG_UCODE] = SEG$STA_X|STA_R, proc->mem, proc-\ >sz-1, DPL_USER$;) 345.1126 Tj 0 -265.8141 Td (1725 cpu->gdt[SEG_UDATA] = SEG$STA_W, proc->mem, proc->sz-1,\ DPL_USER$;) 318.9016 Tj 0 -275.3075 Td (1726 cpu->gdt[SEG_TSS] = SEG16$STS_T32A, &cpu->ts, sizeof\(c\ pu->ts$-1, 0\);) 327.6386 Tj 0 -284.8008 Td (1727 cpu->gdt[SEG_TSS].s = 0;) 135.4239 Tj 0 -294.2942 Td (1728 cpu->ts.ss0 = SEG_KDATA << 3;) 157.2665 Tj 0 -303.7875 Td (1729 cpu->ts.esp0 = $uint$proc->kstack + KSTACKSIZE;) 235.8998 Tj 0 -313.2809 Td (1730 ltr$SEG_TSS << 3$;) 109.2129 Tj 0 -322.7743 Td (1731 popcli;) 69.8962 Tj 0 -332.2676 Td (1732 }) 26.2111 Tj 0 -341.761 Td (1733 ) 21.8426 Tj 0 -351.2543 Td (1734 ) 21.8426 Tj 0 -360.7477 Td (1735 ) 21.8426 Tj 0 -370.2411 Td (1736 ) 21.8426 Tj 0 -379.7344 Td (1737 ) 21.8426 Tj 0 -389.2278 Td (1738 ) 21.8426 Tj 0 -398.7211 Td (1739 ) 21.8426 Tj 0 -408.2145 Td (1740 ) 21.8426 Tj 0 -417.7079 Td (1741 ) 21.8426 Tj 0 -427.2012 Td (1742 ) 21.8426 Tj 0 -436.6946 Td (1743 ) 21.8426 Tj 0 -446.1879 Td (1744 ) 21.8426 Tj 0 -455.6813 Td (1745 ) 21.8426 Tj 0 -465.1747 Td (1746 ) 21.8426 Tj 0 -474.668 Td (1747 ) 21.8426 Tj 0 -484.1614 Td (1748 ) 21.8426 Tj 0 -493.6547 Td (1749 ) 21.8426 Tj 0 -522.1348 Td (Sheet 17) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/proc.c Page 4) 161.635 Tj 0 -28.4801 Td (1750 // Look in the process table for an UNUSED proc.) 231.5313 Tj 0 -37.9735 Td (1751 // If found, change state to EMBRYO and return it.) 240.2683 Tj 0 -47.4668 Td (1752 // Otherwise return 0.) 117.9499 Tj 0 -56.9602 Td (1753 static struct proc*) 104.8443 Tj 0 -66.4535 Td (1754 allocproc$void$) 87.3703 Tj 0 -75.9469 Td (1755 {) 26.2111 Tj 0 -85.4403 Td (1756 struct proc *p;) 96.1073 Tj 0 -94.9336 Td (1757 char *sp;) 69.8962 Tj 0 -104.427 Td (1758 ) 21.8426 Tj 0 -113.9203 Td (1759 acquire$&ptable.lock$;) 126.6869 Tj 0 -123.4137 Td (1760 for$p = ptable.proc; p < &ptable.proc[NPROC]; p++$) 249.0053 Tj 0 -132.9071 Td (1761 if$p->state == UNUSED$) 135.4239 Tj 0 -142.4004 Td (1762 goto found;) 96.1073 Tj 0 -151.8938 Td (1763 release$&ptable.lock$;) 126.6869 Tj 0 -161.3871 Td (1764 return 0;) 69.8962 Tj 0 -170.8805 Td (1765 ) 21.8426 Tj 0 -180.3739 Td (1766 found:) 48.0537 Tj 0 -189.8672 Td (1767 p->state = EMBRYO;) 109.2129 Tj 0 -199.3606 Td (1768 p->pid = nextpid++;) 113.5814 Tj 0 -208.8539 Td (1769 release$&ptable.lock$;) 126.6869 Tj 0 -218.3473 Td (1770 ) 21.8426 Tj 0 -227.8407 Td (1771 // Allocate kernel stack if necessary.) 196.5831 Tj 0 -237.334 Td (1772 if$\(p->kstack = kalloc\(KSTACKSIZE$\) == 0\){) 214.0572 Tj 0 -246.8274 Td (1773 p->state = UNUSED;) 117.9499 Tj 0 -256.3207 Td (1774 return 0;) 78.6333 Tj 0 -265.8141 Td (1775 }) 34.9481 Tj 0 -275.3075 Td (1776 sp = p->kstack + KSTACKSIZE;) 152.898 Tj 0 -284.8008 Td (1777 ) 21.8426 Tj 0 -294.2942 Td (1778 // Leave room for trap frame.) 157.2665 Tj 0 -303.7875 Td (1779 sp -= sizeof *p->tf;) 117.9499 Tj 0 -313.2809 Td (1780 p->tf = $struct trapframe*$sp;) 161.635 Tj 0 -322.7743 Td (1781 ) 21.8426 Tj 0 -332.2676 Td (1782 // Set up new context to start executing at forkret,) 257.7424 Tj 0 -341.761 Td (1783 // which returns to trapret $see below$.) 205.3202 Tj 0 -351.2543 Td (1784 sp -= 4;) 65.5277 Tj 0 -360.7477 Td (1785 *$uint*$sp = $uint$trapret;) 148.5295 Tj 0 -370.2411 Td (1786 ) 21.8426 Tj 0 -379.7344 Td (1787 sp -= sizeof *p->context;) 139.7925 Tj 0 -389.2278 Td (1788 p->context = $struct context*$sp;) 174.7406 Tj 0 -398.7211 Td (1789 memset$p->context, 0, sizeof *p->context$;) 214.0572 Tj 0 -408.2145 Td (1790 p->context->eip = $uint$forkret;) 170.3721 Tj 0 -417.7079 Td (1791 return p;) 69.8962 Tj 0 -427.2012 Td (1792 }) 26.2111 Tj 0 -436.6946 Td (1793 ) 21.8426 Tj 0 -446.1879 Td (1794 ) 21.8426 Tj 0 -455.6813 Td (1795 ) 21.8426 Tj 0 -465.1747 Td (1796 ) 21.8426 Tj 0 -474.668 Td (1797 ) 21.8426 Tj 0 -484.1614 Td (1798 ) 21.8426 Tj 0 -493.6547 Td (1799 ) 21.8426 Tj 0 -522.1348 Td (Sheet 17) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 25 25 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/proc.c Page 5) 161.635 Tj 0 -28.4801 Td (1800 // Set up first user process.) 148.5295 Tj 0 -37.9735 Td (1801 void) 39.3166 Tj 0 -47.4668 Td (1802 userinit$void$) 83.0018 Tj 0 -56.9602 Td (1803 {) 26.2111 Tj 0 -66.4535 Td (1804 struct proc *p;) 96.1073 Tj 0 -75.9469 Td (1805 extern char _binary_initcode_start[], _binary_initcode_s\ ize[];) 301.4275 Tj 0 -85.4403 Td (1806 ) 21.8426 Tj 0 -94.9336 Td (1807 p = allocproc;) 100.4758 Tj 0 -104.427 Td (1808 initproc = p;) 87.3703 Tj 0 -113.9203 Td (1809 ) 21.8426 Tj 0 -123.4137 Td (1810 // Initialize memory from initcode.S) 187.8461 Tj 0 -132.9071 Td (1811 p->sz = PAGE;) 87.3703 Tj 0 -142.4004 Td (1812 p->mem = kalloc$p->sz$;) 131.0554 Tj 0 -151.8938 Td (1813 memset$p->mem, 0, p->sz$;) 139.7925 Tj 0 -161.3871 Td (1814 memmove$p->mem, _binary_initcode_start, \(int$_binary_\ initcode_size\);) 327.6386 Tj 0 -170.8805 Td (1815 ) 21.8426 Tj 0 -180.3739 Td (1816 memset$p->tf, 0, sizeof\(*p->tf$\);) 174.7406 Tj 0 -189.8672 Td (1817 p->tf->cs = $SEG_UCODE << 3$ | DPL_USER;) 205.3202 Tj 0 -199.3606 Td (1818 p->tf->ds = $SEG_UDATA << 3$ | DPL_USER;) 205.3202 Tj 0 -208.8539 Td (1819 p->tf->es = p->tf->ds;) 126.6869 Tj 0 -218.3473 Td (1820 p->tf->ss = p->tf->ds;) 126.6869 Tj 0 -227.8407 Td (1821 p->tf->eflags = FL_IF;) 126.6869 Tj 0 -237.334 Td (1822 p->tf->esp = p->sz;) 113.5814 Tj 0 -246.8274 Td (1823 p->tf->eip = 0; // beginning of initcode.S) 218.4257 Tj 0 -256.3207 Td (1824 ) 21.8426 Tj 0 -265.8141 Td (1825 safestrcpy$p->name, "initcode", sizeof\(p->name$\);) 244.6368 Tj 0 -275.3075 Td (1826 p->cwd = namei$"/"$;) 117.9499 Tj 0 -284.8008 Td (1827 ) 21.8426 Tj 0 -294.2942 Td (1828 p->state = RUNNABLE;) 117.9499 Tj 0 -303.7875 Td (1829 }) 26.2111 Tj 0 -313.2809 Td (1830 ) 21.8426 Tj 0 -322.7743 Td (1831 // Grow current process's memory by n bytes.) 214.0572 Tj 0 -332.2676 Td (1832 // Return 0 on success, -1 on failure.) 187.8461 Tj 0 -341.761 Td (1833 int) 34.9481 Tj 0 -351.2543 Td (1834 growproc$int n$) 87.3703 Tj 0 -360.7477 Td (1835 {) 26.2111 Tj 0 -370.2411 Td (1836 char *newmem;) 87.3703 Tj 0 -379.7344 Td (1837 ) 21.8426 Tj 0 -389.2278 Td (1838 newmem = kalloc$proc->sz + n$;) 161.635 Tj 0 -398.7211 Td (1839 if$newmem == 0$) 96.1073 Tj 0 -408.2145 Td (1840 return -1;) 83.0018 Tj 0 -417.7079 Td (1841 memmove$newmem, proc->mem, proc->sz$;) 192.2146 Tj 0 -427.2012 Td (1842 memset$newmem + proc->sz, 0, n$;) 170.3721 Tj 0 -436.6946 Td (1843 kfree$proc->mem, proc->sz$;) 148.5295 Tj 0 -446.1879 Td (1844 proc->mem = newmem;) 113.5814 Tj 0 -455.6813 Td (1845 proc->sz += n;) 91.7388 Tj 0 -465.1747 Td (1846 usegment;) 78.6333 Tj 0 -474.668 Td (1847 return 0;) 69.8962 Tj 0 -484.1614 Td (1848 }) 26.2111 Tj 0 -493.6547 Td (1849 ) 21.8426 Tj 0 -522.1348 Td (Sheet 18) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/proc.c Page 6) 161.635 Tj 0 -28.4801 Td (1850 // Create a new process copying p as the parent.) 231.5313 Tj 0 -37.9735 Td (1851 // Sets up stack to return as if from system call.) 240.2683 Tj 0 -47.4668 Td (1852 // Caller must set state of returned proc to RUNNABLE.) 257.7424 Tj 0 -56.9602 Td (1853 int) 34.9481 Tj 0 -66.4535 Td (1854 fork$void$) 65.5277 Tj 0 -75.9469 Td (1855 {) 26.2111 Tj 0 -85.4403 Td (1856 int i, pid;) 78.6333 Tj 0 -94.9336 Td (1857 struct proc *np;) 100.4758 Tj 0 -104.427 Td (1858 ) 21.8426 Tj 0 -113.9203 Td (1859 // Allocate process.) 117.9499 Tj 0 -123.4137 Td (1860 if$\(np = allocproc\($\) == 0\)) 148.5295 Tj 0 -132.9071 Td (1861 return -1;) 83.0018 Tj 0 -142.4004 Td (1862 ) 21.8426 Tj 0 -151.8938 Td (1863 // Copy process state from p.) 157.2665 Tj 0 -161.3871 Td (1864 np->sz = proc->sz;) 109.2129 Tj 0 -170.8805 Td (1865 if$\(np->mem = kalloc\(np->sz$\) == 0\){) 187.8461 Tj 0 -180.3739 Td (1866 kfree$np->kstack, KSTACKSIZE$;) 170.3721 Tj 0 -189.8672 Td (1867 np->kstack = 0;) 104.8443 Tj 0 -199.3606 Td (1868 np->state = UNUSED;) 122.3184 Tj 0 -208.8539 Td (1869 return -1;) 83.0018 Tj 0 -218.3473 Td (1870 }) 34.9481 Tj 0 -227.8407 Td (1871 memmove$np->mem, proc->mem, np->sz$;) 187.8461 Tj 0 -237.334 Td (1872 np->parent = proc;) 109.2129 Tj 0 -246.8274 Td (1873 *np->tf = *proc->tf;) 117.9499 Tj 0 -256.3207 Td (1874 ) 21.8426 Tj 0 -265.8141 Td (1875 // Clear %eax so that fork returns 0 in the child.) 249.0053 Tj 0 -275.3075 Td (1876 np->tf->eax = 0;) 100.4758 Tj 0 -284.8008 Td (1877 ) 21.8426 Tj 0 -294.2942 Td (1878 for$i = 0; i < NOFILE; i++$) 148.5295 Tj 0 -303.7875 Td (1879 if$proc->ofile[i]$) 117.9499 Tj 0 -313.2809 Td (1880 np->ofile[i] = filedup$proc->ofile[i]$;) 218.4257 Tj 0 -322.7743 Td (1881 np->cwd = idup$proc->cwd$;) 144.161 Tj 0 -332.2676 Td (1882 ) 21.8426 Tj 0 -341.761 Td (1883 pid = np->pid;) 91.7388 Tj 0 -351.2543 Td (1884 np->state = RUNNABLE;) 122.3184 Tj 0 -360.7477 Td (1885 ) 21.8426 Tj 0 -370.2411 Td (1886 return pid;) 78.6333 Tj 0 -379.7344 Td (1887 }) 26.2111 Tj 0 -389.2278 Td (1888 ) 21.8426 Tj 0 -398.7211 Td (1889 ) 21.8426 Tj 0 -408.2145 Td (1890 ) 21.8426 Tj 0 -417.7079 Td (1891 ) 21.8426 Tj 0 -427.2012 Td (1892 ) 21.8426 Tj 0 -436.6946 Td (1893 ) 21.8426 Tj 0 -446.1879 Td (1894 ) 21.8426 Tj 0 -455.6813 Td (1895 ) 21.8426 Tj 0 -465.1747 Td (1896 ) 21.8426 Tj 0 -474.668 Td (1897 ) 21.8426 Tj 0 -484.1614 Td (1898 ) 21.8426 Tj 0 -493.6547 Td (1899 ) 21.8426 Tj 0 -522.1348 Td (Sheet 18) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 26 26 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/proc.c Page 7) 161.635 Tj 0 -28.4801 Td (1900 // Per-CPU process scheduler.) 148.5295 Tj 0 -37.9735 Td (1901 // Each CPU calls scheduler after setting itself up.) 257.7424 Tj 0 -47.4668 Td (1902 // Scheduler never returns. It loops, doing:) 218.4257 Tj 0 -56.9602 Td (1903 // - choose a process to run) 148.5295 Tj 0 -66.4535 Td (1904 // - swtch to start running that process) 200.9517 Tj 0 -75.9469 Td (1905 // - eventually that process transfers control) 227.1628 Tj 0 -85.4403 Td (1906 // via swtch back to the scheduler.) 196.5831 Tj 0 -94.9336 Td (1907 void) 39.3166 Tj 0 -104.427 Td (1908 scheduler$void$) 87.3703 Tj 0 -113.9203 Td (1909 {) 26.2111 Tj 0 -123.4137 Td (1910 struct proc *p;) 96.1073 Tj 0 -132.9071 Td (1911 ) 21.8426 Tj 0 -142.4004 Td (1912 for$;;${) 65.5277 Tj 0 -151.8938 Td (1913 // Enable interrupts on this processor.) 209.6887 Tj 0 -161.3871 Td (1914 sti;) 65.5277 Tj 0 -170.8805 Td (1915 ) 21.8426 Tj 0 -180.3739 Td (1916 // Loop over process table looking for process to run.) 275.2164 Tj 0 -189.8672 Td (1917 acquire$&ptable.lock$;) 135.4239 Tj 0 -199.3606 Td (1918 for$p = ptable.proc; p < &ptable.proc[NPROC]; p++${) 262.1109 Tj 0 -208.8539 Td (1919 if$p->state != RUNNABLE$) 152.898 Tj 0 -218.3473 Td (1920 continue;) 96.1073 Tj 0 -227.8407 Td (1921 ) 21.8426 Tj 0 -237.334 Td (1922 // Switch to chosen process. It is the process's jo\ b) 279.5849 Tj 0 -246.8274 Td (1923 // to release ptable.lock and then reacquire it) 253.3738 Tj 0 -256.3207 Td (1924 // before jumping back to us.) 174.7406 Tj 0 -265.8141 Td (1925 proc = p;) 87.3703 Tj 0 -275.3075 Td (1926 usegment;) 96.1073 Tj 0 -284.8008 Td (1927 p->state = RUNNING;) 131.0554 Tj 0 -294.2942 Td (1928 swtch$&cpu->scheduler, proc->context$;) 214.0572 Tj 0 -303.7875 Td (1929 ) 21.8426 Tj 0 -313.2809 Td (1930 // Process is done running for now.) 200.9517 Tj 0 -322.7743 Td (1931 // It should have changed its p->state before coming\ back.) 301.4275 Tj 0 -332.2676 Td (1932 proc = 0;) 87.3703 Tj 0 -341.761 Td (1933 }) 43.6851 Tj 0 -351.2543 Td (1934 release$&ptable.lock$;) 135.4239 Tj 0 -360.7477 Td (1935 ) 21.8426 Tj 0 -370.2411 Td (1936 }) 34.9481 Tj 0 -379.7344 Td (1937 }) 26.2111 Tj 0 -389.2278 Td (1938 ) 21.8426 Tj 0 -398.7211 Td (1939 ) 21.8426 Tj 0 -408.2145 Td (1940 ) 21.8426 Tj 0 -417.7079 Td (1941 ) 21.8426 Tj 0 -427.2012 Td (1942 ) 21.8426 Tj 0 -436.6946 Td (1943 ) 21.8426 Tj 0 -446.1879 Td (1944 ) 21.8426 Tj 0 -455.6813 Td (1945 ) 21.8426 Tj 0 -465.1747 Td (1946 ) 21.8426 Tj 0 -474.668 Td (1947 ) 21.8426 Tj 0 -484.1614 Td (1948 ) 21.8426 Tj 0 -493.6547 Td (1949 ) 21.8426 Tj 0 -522.1348 Td (Sheet 19) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/proc.c Page 8) 161.635 Tj 0 -28.4801 Td (1950 // Enter scheduler. Must hold only ptable.lock) 227.1628 Tj 0 -37.9735 Td (1951 // and have changed proc->state.) 161.635 Tj 0 -47.4668 Td (1952 void) 39.3166 Tj 0 -56.9602 Td (1953 sched$void$) 69.8962 Tj 0 -66.4535 Td (1954 {) 26.2111 Tj 0 -75.9469 Td (1955 int intena;) 78.6333 Tj 0 -85.4403 Td (1956 ) 21.8426 Tj 0 -94.9336 Td (1957 if$!holding\(&ptable.lock$\)) 144.161 Tj 0 -104.427 Td (1958 panic$"sched ptable.lock"$;) 157.2665 Tj 0 -113.9203 Td (1959 if$cpu->ncli != 1$) 109.2129 Tj 0 -123.4137 Td (1960 panic$"sched locks"$;) 131.0554 Tj 0 -132.9071 Td (1961 if$proc->state == RUNNING$) 144.161 Tj 0 -142.4004 Td (1962 panic$"sched running"$;) 139.7925 Tj 0 -151.8938 Td (1963 if$readeflags\($&FL_IF\)) 126.6869 Tj 0 -161.3871 Td (1964 panic$"sched interruptible"$;) 166.0035 Tj 0 -170.8805 Td (1965 ) 21.8426 Tj 0 -180.3739 Td (1966 intena = cpu->intena;) 122.3184 Tj 0 -189.8672 Td (1967 swtch$&proc->context, cpu->scheduler$;) 196.5831 Tj 0 -199.3606 Td (1968 cpu->intena = intena;) 122.3184 Tj 0 -208.8539 Td (1969 }) 26.2111 Tj 0 -218.3473 Td (1970 ) 21.8426 Tj 0 -227.8407 Td (1971 // Give up the CPU for one scheduling round.) 214.0572 Tj 0 -237.334 Td (1972 void) 39.3166 Tj 0 -246.8274 Td (1973 yield$void$) 69.8962 Tj 0 -256.3207 Td (1974 {) 26.2111 Tj 0 -265.8141 Td (1975 acquire$&ptable.lock$; ) 135.4239 Tj 0 -275.3075 Td (1976 proc->state = RUNNABLE;) 131.0554 Tj 0 -284.8008 Td (1977 sched;) 65.5277 Tj 0 -294.2942 Td (1978 release$&ptable.lock$;) 126.6869 Tj 0 -303.7875 Td (1979 }) 26.2111 Tj 0 -313.2809 Td (1980 ) 21.8426 Tj 0 -322.7743 Td (1981 // A fork child's very first scheduling by scheduler) 257.7424 Tj 0 -332.2676 Td (1982 // will swtch here. "Return" to user space.) 214.0572 Tj 0 -341.761 Td (1983 void) 39.3166 Tj 0 -351.2543 Td (1984 forkret$void$) 78.6333 Tj 0 -360.7477 Td (1985 {) 26.2111 Tj 0 -370.2411 Td (1986 // Still holding ptable.lock from scheduler.) 222.7942 Tj 0 -379.7344 Td (1987 release$&ptable.lock$;) 126.6869 Tj 0 -389.2278 Td (1988 ) 21.8426 Tj 0 -398.7211 Td (1989 // Return to "caller", actually trapret $see allocproc$\ .) 275.2164 Tj 0 -408.2145 Td (1990 }) 26.2111 Tj 0 -417.7079 Td (1991 ) 21.8426 Tj 0 -427.2012 Td (1992 ) 21.8426 Tj 0 -436.6946 Td (1993 ) 21.8426 Tj 0 -446.1879 Td (1994 ) 21.8426 Tj 0 -455.6813 Td (1995 ) 21.8426 Tj 0 -465.1747 Td (1996 ) 21.8426 Tj 0 -474.668 Td (1997 ) 21.8426 Tj 0 -484.1614 Td (1998 ) 21.8426 Tj 0 -493.6547 Td (1999 ) 21.8426 Tj 0 -522.1348 Td (Sheet 19) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 27 27 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/proc.c Page 9) 161.635 Tj 0 -28.4801 Td (2000 // Atomically release lock and sleep on chan.) 218.4257 Tj 0 -37.9735 Td (2001 // Reacquires lock when awakened.) 166.0035 Tj 0 -47.4668 Td (2002 void) 39.3166 Tj 0 -56.9602 Td (2003 sleep$void *chan, struct spinlock *lk$) 187.8461 Tj 0 -66.4535 Td (2004 {) 26.2111 Tj 0 -75.9469 Td (2005 if$proc == 0$) 87.3703 Tj 0 -85.4403 Td (2006 panic$"sleep"$;) 104.8443 Tj 0 -94.9336 Td (2007 ) 21.8426 Tj 0 -104.427 Td (2008 if$lk == 0$) 78.6333 Tj 0 -113.9203 Td (2009 panic$"sleep without lk"$;) 152.898 Tj 0 -123.4137 Td (2010 ) 21.8426 Tj 0 -132.9071 Td (2011 // Must acquire ptable.lock in order to) 200.9517 Tj 0 -142.4004 Td (2012 // change p->state and then call sched.) 200.9517 Tj 0 -151.8938 Td (2013 // Once we hold ptable.lock, we can be) 196.5831 Tj 0 -161.3871 Td (2014 // guaranteed that we won't miss any wakeup) 218.4257 Tj 0 -170.8805 Td (2015 // $wakeup runs with ptable.lock locked$,) 209.6887 Tj 0 -180.3739 Td (2016 // so it's okay to release lk.) 161.635 Tj 0 -189.8672 Td (2017 if$lk != &ptable.lock${ ) 139.7925 Tj 0 -199.3606 Td (2018 acquire$&ptable.lock$; ) 144.161 Tj 0 -208.8539 Td (2019 release$lk$;) 91.7388 Tj 0 -218.3473 Td (2020 }) 34.9481 Tj 0 -227.8407 Td (2021 ) 21.8426 Tj 0 -237.334 Td (2022 // Go to sleep.) 96.1073 Tj 0 -246.8274 Td (2023 proc->chan = chan;) 109.2129 Tj 0 -256.3207 Td (2024 proc->state = SLEEPING;) 131.0554 Tj 0 -265.8141 Td (2025 sched;) 65.5277 Tj 0 -275.3075 Td (2026 ) 21.8426 Tj 0 -284.8008 Td (2027 // Tidy up.) 78.6333 Tj 0 -294.2942 Td (2028 proc->chan = 0;) 96.1073 Tj 0 -303.7875 Td (2029 ) 21.8426 Tj 0 -313.2809 Td (2030 // Reacquire original lock.) 148.5295 Tj 0 -322.7743 Td (2031 if$lk != &ptable.lock${ ) 139.7925 Tj 0 -332.2676 Td (2032 release$&ptable.lock$;) 135.4239 Tj 0 -341.761 Td (2033 acquire$lk$;) 91.7388 Tj 0 -351.2543 Td (2034 }) 34.9481 Tj 0 -360.7477 Td (2035 }) 26.2111 Tj 0 -370.2411 Td (2036 ) 21.8426 Tj 0 -379.7344 Td (2037 ) 21.8426 Tj 0 -389.2278 Td (2038 ) 21.8426 Tj 0 -398.7211 Td (2039 ) 21.8426 Tj 0 -408.2145 Td (2040 ) 21.8426 Tj 0 -417.7079 Td (2041 ) 21.8426 Tj 0 -427.2012 Td (2042 ) 21.8426 Tj 0 -436.6946 Td (2043 ) 21.8426 Tj 0 -446.1879 Td (2044 ) 21.8426 Tj 0 -455.6813 Td (2045 ) 21.8426 Tj 0 -465.1747 Td (2046 ) 21.8426 Tj 0 -474.668 Td (2047 ) 21.8426 Tj 0 -484.1614 Td (2048 ) 21.8426 Tj 0 -493.6547 Td (2049 ) 21.8426 Tj 0 -522.1348 Td (Sheet 20) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/proc.c Page 10) 166.0035 Tj 0 -28.4801 Td (2050 // Wake up all processes sleeping on chan.) 205.3202 Tj 0 -37.9735 Td (2051 // The ptable lock must be held.) 161.635 Tj 0 -47.4668 Td (2052 static void) 69.8962 Tj 0 -56.9602 Td (2053 wakeup1$void *chan$) 104.8443 Tj 0 -66.4535 Td (2054 {) 26.2111 Tj 0 -75.9469 Td (2055 struct proc *p;) 96.1073 Tj 0 -85.4403 Td (2056 ) 21.8426 Tj 0 -94.9336 Td (2057 for$p = ptable.proc; p < &ptable.proc[NPROC]; p++$) 249.0053 Tj 0 -104.427 Td (2058 if$p->state == SLEEPING && p->chan == chan$) 227.1628 Tj 0 -113.9203 Td (2059 p->state = RUNNABLE;) 135.4239 Tj 0 -123.4137 Td (2060 }) 26.2111 Tj 0 -132.9071 Td (2061 ) 21.8426 Tj 0 -142.4004 Td (2062 // Wake up all processes sleeping on chan.) 205.3202 Tj 0 -151.8938 Td (2063 void) 39.3166 Tj 0 -161.3871 Td (2064 wakeup$void *chan$) 100.4758 Tj 0 -170.8805 Td (2065 {) 26.2111 Tj 0 -180.3739 Td (2066 acquire$&ptable.lock$;) 126.6869 Tj 0 -189.8672 Td (2067 wakeup1$chan$;) 91.7388 Tj 0 -199.3606 Td (2068 release$&ptable.lock$;) 126.6869 Tj 0 -208.8539 Td (2069 }) 26.2111 Tj 0 -218.3473 Td (2070 ) 21.8426 Tj 0 -227.8407 Td (2071 // Kill the process with the given pid.) 192.2146 Tj 0 -237.334 Td (2072 // Process won't exit until it returns) 187.8461 Tj 0 -246.8274 Td (2073 // to user space $see trap in trap.c$.) 187.8461 Tj 0 -256.3207 Td (2074 int) 34.9481 Tj 0 -265.8141 Td (2075 kill$int pid$) 78.6333 Tj 0 -275.3075 Td (2076 {) 26.2111 Tj 0 -284.8008 Td (2077 struct proc *p;) 96.1073 Tj 0 -294.2942 Td (2078 ) 21.8426 Tj 0 -303.7875 Td (2079 acquire$&ptable.lock$;) 126.6869 Tj 0 -313.2809 Td (2080 for$p = ptable.proc; p < &ptable.proc[NPROC]; p++${) 253.3738 Tj 0 -322.7743 Td (2081 if$p->pid == pid${) 117.9499 Tj 0 -332.2676 Td (2082 p->killed = 1;) 109.2129 Tj 0 -341.761 Td (2083 // Wake process from sleep if necessary.) 222.7942 Tj 0 -351.2543 Td (2084 if$p->state == SLEEPING$) 152.898 Tj 0 -360.7477 Td (2085 p->state = RUNNABLE;) 144.161 Tj 0 -370.2411 Td (2086 release$&ptable.lock$;) 144.161 Tj 0 -379.7344 Td (2087 return 0;) 87.3703 Tj 0 -389.2278 Td (2088 }) 43.6851 Tj 0 -398.7211 Td (2089 }) 34.9481 Tj 0 -408.2145 Td (2090 release$&ptable.lock$;) 126.6869 Tj 0 -417.7079 Td (2091 return -1;) 74.2647 Tj 0 -427.2012 Td (2092 }) 26.2111 Tj 0 -436.6946 Td (2093 ) 21.8426 Tj 0 -446.1879 Td (2094 ) 21.8426 Tj 0 -455.6813 Td (2095 ) 21.8426 Tj 0 -465.1747 Td (2096 ) 21.8426 Tj 0 -474.668 Td (2097 ) 21.8426 Tj 0 -484.1614 Td (2098 ) 21.8426 Tj 0 -493.6547 Td (2099 ) 21.8426 Tj 0 -522.1348 Td (Sheet 20) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 28 28 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/proc.c Page 11) 166.0035 Tj 0 -28.4801 Td (2100 // Exit the current process. Does not return.) 222.7942 Tj 0 -37.9735 Td (2101 // An exited process remains in the zombie state) 231.5313 Tj 0 -47.4668 Td (2102 // until its parent calls wait to find out it exited.) 262.1109 Tj 0 -56.9602 Td (2103 void) 39.3166 Tj 0 -66.4535 Td (2104 exit$void$) 65.5277 Tj 0 -75.9469 Td (2105 {) 26.2111 Tj 0 -85.4403 Td (2106 struct proc *p;) 96.1073 Tj 0 -94.9336 Td (2107 int fd;) 61.1592 Tj 0 -104.427 Td (2108 ) 21.8426 Tj 0 -113.9203 Td (2109 if$proc == initproc$) 117.9499 Tj 0 -123.4137 Td (2110 panic$"init exiting"$;) 135.4239 Tj 0 -132.9071 Td (2111 ) 21.8426 Tj 0 -142.4004 Td (2112 // Close all open files.) 135.4239 Tj 0 -151.8938 Td (2113 for$fd = 0; fd < NOFILE; fd++${) 166.0035 Tj 0 -161.3871 Td (2114 if$proc->ofile[fd]${) 126.6869 Tj 0 -170.8805 Td (2115 fileclose$proc->ofile[fd]$;) 166.0035 Tj 0 -180.3739 Td (2116 proc->ofile[fd] = 0;) 135.4239 Tj 0 -189.8672 Td (2117 }) 43.6851 Tj 0 -199.3606 Td (2118 }) 34.9481 Tj 0 -208.8539 Td (2119 ) 21.8426 Tj 0 -218.3473 Td (2120 iput$proc->cwd$;) 100.4758 Tj 0 -227.8407 Td (2121 proc->cwd = 0;) 91.7388 Tj 0 -237.334 Td (2122 ) 21.8426 Tj 0 -246.8274 Td (2123 acquire$&ptable.lock$;) 126.6869 Tj 0 -256.3207 Td (2124 ) 21.8426 Tj 0 -265.8141 Td (2125 // Parent might be sleeping in wait.) 196.5831 Tj 0 -275.3075 Td (2126 wakeup1$proc->parent$;) 126.6869 Tj 0 -284.8008 Td (2127 ) 21.8426 Tj 0 -294.2942 Td (2128 // Pass abandoned children to init.) 183.4776 Tj 0 -303.7875 Td (2129 for$p = ptable.proc; p < &ptable.proc[NPROC]; p++${) 253.3738 Tj 0 -313.2809 Td (2130 if$p->parent == proc${) 135.4239 Tj 0 -322.7743 Td (2131 p->parent = initproc;) 139.7925 Tj 0 -332.2676 Td (2132 if$p->state == ZOMBIE$) 144.161 Tj 0 -341.761 Td (2133 wakeup1$initproc$;) 135.4239 Tj 0 -351.2543 Td (2134 }) 43.6851 Tj 0 -360.7477 Td (2135 }) 34.9481 Tj 0 -370.2411 Td (2136 ) 21.8426 Tj 0 -379.7344 Td (2137 // Jump into the scheduler, never to return.) 222.7942 Tj 0 -389.2278 Td (2138 proc->state = ZOMBIE;) 122.3184 Tj 0 -398.7211 Td (2139 sched;) 65.5277 Tj 0 -408.2145 Td (2140 panic$"zombie exit"$;) 122.3184 Tj 0 -417.7079 Td (2141 }) 26.2111 Tj 0 -427.2012 Td (2142 ) 21.8426 Tj 0 -436.6946 Td (2143 ) 21.8426 Tj 0 -446.1879 Td (2144 ) 21.8426 Tj 0 -455.6813 Td (2145 ) 21.8426 Tj 0 -465.1747 Td (2146 ) 21.8426 Tj 0 -474.668 Td (2147 ) 21.8426 Tj 0 -484.1614 Td (2148 ) 21.8426 Tj 0 -493.6547 Td (2149 ) 21.8426 Tj 0 -522.1348 Td (Sheet 21) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/proc.c Page 12) 166.0035 Tj 0 -28.4801 Td (2150 // Wait for a child process to exit and return its pid.) 262.1109 Tj 0 -37.9735 Td (2151 // Return -1 if this process has no children.) 218.4257 Tj 0 -47.4668 Td (2152 int) 34.9481 Tj 0 -56.9602 Td (2153 wait$void$) 65.5277 Tj 0 -66.4535 Td (2154 {) 26.2111 Tj 0 -75.9469 Td (2155 struct proc *p;) 96.1073 Tj 0 -85.4403 Td (2156 int havekids, pid;) 109.2129 Tj 0 -94.9336 Td (2157 ) 21.8426 Tj 0 -104.427 Td (2158 acquire$&ptable.lock$;) 126.6869 Tj 0 -113.9203 Td (2159 for$;;${) 65.5277 Tj 0 -123.4137 Td (2160 // Scan through table looking for zombie children.) 257.7424 Tj 0 -132.9071 Td (2161 havekids = 0;) 96.1073 Tj 0 -142.4004 Td (2162 for$p = ptable.proc; p < &ptable.proc[NPROC]; p++${) 262.1109 Tj 0 -151.8938 Td (2163 if$p->parent != proc$) 139.7925 Tj 0 -161.3871 Td (2164 continue;) 96.1073 Tj 0 -170.8805 Td (2165 havekids = 1;) 104.8443 Tj 0 -180.3739 Td (2166 if$p->state == ZOMBIE${) 148.5295 Tj 0 -189.8672 Td (2167 // Found one.) 113.5814 Tj 0 -199.3606 Td (2168 pid = p->pid;) 113.5814 Tj 0 -208.8539 Td (2169 kfree$p->mem, p->sz$;) 148.5295 Tj 0 -218.3473 Td (2170 kfree$p->kstack, KSTACKSIZE$;) 183.4776 Tj 0 -227.8407 Td (2171 p->state = UNUSED;) 135.4239 Tj 0 -237.334 Td (2172 p->pid = 0;) 104.8443 Tj 0 -246.8274 Td (2173 p->parent = 0;) 117.9499 Tj 0 -256.3207 Td (2174 p->name[0] = 0;) 122.3184 Tj 0 -265.8141 Td (2175 p->killed = 0;) 117.9499 Tj 0 -275.3075 Td (2176 release$&ptable.lock$;) 152.898 Tj 0 -284.8008 Td (2177 return pid;) 104.8443 Tj 0 -294.2942 Td (2178 }) 52.4222 Tj 0 -303.7875 Td (2179 }) 43.6851 Tj 0 -313.2809 Td (2180 ) 21.8426 Tj 0 -322.7743 Td (2181 // No point waiting if we don't have any children.) 257.7424 Tj 0 -332.2676 Td (2182 if$!havekids || proc->killed${) 170.3721 Tj 0 -341.761 Td (2183 release$&ptable.lock$;) 144.161 Tj 0 -351.2543 Td (2184 return -1;) 91.7388 Tj 0 -360.7477 Td (2185 }) 43.6851 Tj 0 -370.2411 Td (2186 ) 21.8426 Tj 0 -379.7344 Td (2187 // Wait for children to exit. $See wakeup1 call in p\ roc_exit.$) 314.533 Tj 0 -389.2278 Td (2188 sleep$proc, &ptable.lock$; ) 161.635 Tj 0 -398.7211 Td (2189 }) 34.9481 Tj 0 -408.2145 Td (2190 }) 26.2111 Tj 0 -417.7079 Td (2191 ) 21.8426 Tj 0 -427.2012 Td (2192 ) 21.8426 Tj 0 -436.6946 Td (2193 ) 21.8426 Tj 0 -446.1879 Td (2194 ) 21.8426 Tj 0 -455.6813 Td (2195 ) 21.8426 Tj 0 -465.1747 Td (2196 ) 21.8426 Tj 0 -474.668 Td (2197 ) 21.8426 Tj 0 -484.1614 Td (2198 ) 21.8426 Tj 0 -493.6547 Td (2199 ) 21.8426 Tj 0 -522.1348 Td (Sheet 21) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 29 29 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/swtch.S Page 1) 166.0035 Tj 0 -28.4801 Td (2200 # Context switch) 91.7388 Tj 0 -37.9735 Td (2201 #) 26.2111 Tj 0 -47.4668 Td (2202 # void swtch$struct context **old, struct context *new$\ ;) 275.2164 Tj 0 -56.9602 Td (2203 #) 26.2111 Tj 0 -66.4535 Td (2204 # Save current register context in old) 187.8461 Tj 0 -75.9469 Td (2205 # and then load register context from new.) 205.3202 Tj 0 -85.4403 Td (2206 ) 21.8426 Tj 0 -94.9336 Td (2207 .globl swtch) 74.2647 Tj 0 -104.427 Td (2208 swtch:) 48.0537 Tj 0 -113.9203 Td (2209 movl 4$%esp$, %eax) 109.2129 Tj 0 -123.4137 Td (2210 movl 8$%esp$, %edx) 109.2129 Tj 0 -132.9071 Td (2211 ) 21.8426 Tj 0 -142.4004 Td (2212 # Save old callee-save registers) 170.3721 Tj 0 -151.8938 Td (2213 pushl %ebp) 74.2647 Tj 0 -161.3871 Td (2214 pushl %ebx) 74.2647 Tj 0 -170.8805 Td (2215 pushl %esi) 74.2647 Tj 0 -180.3739 Td (2216 pushl %edi) 74.2647 Tj 0 -189.8672 Td (2217 ) 21.8426 Tj 0 -199.3606 Td (2218 # Switch stacks) 96.1073 Tj 0 -208.8539 Td (2219 movl %esp, $%eax$) 104.8443 Tj 0 -218.3473 Td (2220 movl %edx, %esp) 96.1073 Tj 0 -227.8407 Td (2221 ) 21.8426 Tj 0 -237.334 Td (2222 # Load new callee-save registers) 170.3721 Tj 0 -246.8274 Td (2223 popl %edi) 69.8962 Tj 0 -256.3207 Td (2224 popl %esi) 69.8962 Tj 0 -265.8141 Td (2225 popl %ebx) 69.8962 Tj 0 -275.3075 Td (2226 popl %ebp) 69.8962 Tj 0 -284.8008 Td (2227 ret) 43.6851 Tj 0 -294.2942 Td (2228 ) 21.8426 Tj 0 -303.7875 Td (2229 ) 21.8426 Tj 0 -313.2809 Td (2230 ) 21.8426 Tj 0 -322.7743 Td (2231 ) 21.8426 Tj 0 -332.2676 Td (2232 ) 21.8426 Tj 0 -341.761 Td (2233 ) 21.8426 Tj 0 -351.2543 Td (2234 ) 21.8426 Tj 0 -360.7477 Td (2235 ) 21.8426 Tj 0 -370.2411 Td (2236 ) 21.8426 Tj 0 -379.7344 Td (2237 ) 21.8426 Tj 0 -389.2278 Td (2238 ) 21.8426 Tj 0 -398.7211 Td (2239 ) 21.8426 Tj 0 -408.2145 Td (2240 ) 21.8426 Tj 0 -417.7079 Td (2241 ) 21.8426 Tj 0 -427.2012 Td (2242 ) 21.8426 Tj 0 -436.6946 Td (2243 ) 21.8426 Tj 0 -446.1879 Td (2244 ) 21.8426 Tj 0 -455.6813 Td (2245 ) 21.8426 Tj 0 -465.1747 Td (2246 ) 21.8426 Tj 0 -474.668 Td (2247 ) 21.8426 Tj 0 -484.1614 Td (2248 ) 21.8426 Tj 0 -493.6547 Td (2249 ) 21.8426 Tj 0 -522.1348 Td (Sheet 22) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/kalloc.c Page 1) 170.3721 Tj 0 -28.4801 Td (2250 // Physical memory allocator, intended to allocate) 240.2683 Tj 0 -37.9735 Td (2251 // memory for user processes. Allocates in 4096-byte "page\ s".) 288.322 Tj 0 -47.4668 Td (2252 // Free list is kept sorted and combines adjacent pages in\ to) 283.9534 Tj 0 -56.9602 Td (2253 // long runs, to make it easier to allocate big segments.) 270.8479 Tj 0 -66.4535 Td (2254 // One reason the page size is 4k is that the x86 segment \ size) 292.6905 Tj 0 -75.9469 Td (2255 // granularity is 4k.) 113.5814 Tj 0 -85.4403 Td (2256 ) 21.8426 Tj 0 -94.9336 Td (2257 #include "types.h") 100.4758 Tj 0 -104.427 Td (2258 #include "defs.h") 96.1073 Tj 0 -113.9203 Td (2259 #include "param.h") 100.4758 Tj 0 -123.4137 Td (2260 #include "spinlock.h") 113.5814 Tj 0 -132.9071 Td (2261 ) 21.8426 Tj 0 -142.4004 Td (2262 struct run {) 74.2647 Tj 0 -151.8938 Td (2263 struct run *next;) 104.8443 Tj 0 -161.3871 Td (2264 int len; // bytes) 104.8443 Tj 0 -170.8805 Td (2265 };) 30.5796 Tj 0 -180.3739 Td (2266 ) 21.8426 Tj 0 -189.8672 Td (2267 struct {) 56.7907 Tj 0 -199.3606 Td (2268 struct spinlock lock;) 122.3184 Tj 0 -208.8539 Td (2269 struct run *freelist;) 122.3184 Tj 0 -218.3473 Td (2270 } kmem;) 52.4222 Tj 0 -227.8407 Td (2271 ) 21.8426 Tj 0 -237.334 Td (2272 // Initialize free list of physical pages.) 205.3202 Tj 0 -246.8274 Td (2273 // This code cheats by just considering one megabyte of) 262.1109 Tj 0 -256.3207 Td (2274 // pages after end. Real systems would determine the) 253.3738 Tj 0 -265.8141 Td (2275 // amount of memory available in the system and use it all\ .) 279.5849 Tj 0 -275.3075 Td (2276 void) 39.3166 Tj 0 -284.8008 Td (2277 kinit$void$) 69.8962 Tj 0 -294.2942 Td (2278 {) 26.2111 Tj 0 -303.7875 Td (2279 extern char end[];) 109.2129 Tj 0 -313.2809 Td (2280 uint len;) 69.8962 Tj 0 -322.7743 Td (2281 char *p;) 65.5277 Tj 0 -332.2676 Td (2282 ) 21.8426 Tj 0 -341.761 Td (2283 initlock$&kmem.lock, "kmem"$;) 157.2665 Tj 0 -351.2543 Td (2284 p = $char*$$\(\(uint$end + PAGE\) & ~$PAGE-1$\);) 222.7942 Tj 0 -360.7477 Td (2285 len = 256*PAGE; // assume computer has 256 pages of RAM,\ 1 MB) 297.059 Tj 0 -370.2411 Td (2286 cprintf$"mem = %d\\n", len$;) 148.5295 Tj 0 -379.7344 Td (2287 kfree$p, len$;) 91.7388 Tj 0 -389.2278 Td (2288 }) 26.2111 Tj 0 -398.7211 Td (2289 ) 21.8426 Tj 0 -408.2145 Td (2290 ) 21.8426 Tj 0 -417.7079 Td (2291 ) 21.8426 Tj 0 -427.2012 Td (2292 ) 21.8426 Tj 0 -436.6946 Td (2293 ) 21.8426 Tj 0 -446.1879 Td (2294 ) 21.8426 Tj 0 -455.6813 Td (2295 ) 21.8426 Tj 0 -465.1747 Td (2296 ) 21.8426 Tj 0 -474.668 Td (2297 ) 21.8426 Tj 0 -484.1614 Td (2298 ) 21.8426 Tj 0 -493.6547 Td (2299 ) 21.8426 Tj 0 -522.1348 Td (Sheet 22) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 30 30 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/kalloc.c Page 2) 170.3721 Tj 0 -28.4801 Td (2300 // Free the len bytes of memory pointed at by v,) 231.5313 Tj 0 -37.9735 Td (2301 // which normally should have been returned by a) 231.5313 Tj 0 -47.4668 Td (2302 // call to kalloc$len$. $The exception is when) 227.1628 Tj 0 -56.9602 Td (2303 // initializing the allocator; see kinit above.$) 231.5313 Tj 0 -66.4535 Td (2304 void) 39.3166 Tj 0 -75.9469 Td (2305 kfree$char *v, int len$) 122.3184 Tj 0 -85.4403 Td (2306 {) 26.2111 Tj 0 -94.9336 Td (2307 struct run *r, *rend, **rp, *p, *pend;) 196.5831 Tj 0 -104.427 Td (2308 ) 21.8426 Tj 0 -113.9203 Td (2309 if$len <= 0 || len % PAGE$) 144.161 Tj 0 -123.4137 Td (2310 panic$"kfree"$;) 104.8443 Tj 0 -132.9071 Td (2311 ) 21.8426 Tj 0 -142.4004 Td (2312 // Fill with junk to catch dangling refs.) 209.6887 Tj 0 -151.8938 Td (2313 memset$v, 1, len$;) 109.2129 Tj 0 -161.3871 Td (2314 ) 21.8426 Tj 0 -170.8805 Td (2315 acquire$&kmem.lock$;) 117.9499 Tj 0 -180.3739 Td (2316 p = $struct run*$v;) 113.5814 Tj 0 -189.8672 Td (2317 pend = $struct run*$$v + len$;) 161.635 Tj 0 -199.3606 Td (2318 for$rp=&kmem.freelist; \(r=*rp$ != 0 && r <= pend; rp=\ &r->next\){) 305.796 Tj 0 -208.8539 Td (2319 rend = $struct run*$$\(char*$r + r->len\);) 214.0572 Tj 0 -218.3473 Td (2320 if$r <= p && p < rend$) 135.4239 Tj 0 -227.8407 Td (2321 panic$"freeing free page"$;) 166.0035 Tj 0 -237.334 Td (2322 if$rend == p${ // r before p: expand r to include p) 266.4794 Tj 0 -246.8274 Td (2323 r->len += len;) 109.2129 Tj 0 -256.3207 Td (2324 if$r->next && r->next == pend${ // r now next to \ r->next?) 301.4275 Tj 0 -265.8141 Td (2325 r->len += r->next->len;) 157.2665 Tj 0 -275.3075 Td (2326 r->next = r->next->next;) 161.635 Tj 0 -284.8008 Td (2327 }) 52.4222 Tj 0 -294.2942 Td (2328 goto out;) 87.3703 Tj 0 -303.7875 Td (2329 }) 43.6851 Tj 0 -313.2809 Td (2330 if$pend == r${ // p before r: expand p to include, \ replace r) 305.796 Tj 0 -322.7743 Td (2331 p->len = len + r->len;) 144.161 Tj 0 -332.2676 Td (2332 p->next = r->next;) 126.6869 Tj 0 -341.761 Td (2333 *rp = p;) 83.0018 Tj 0 -351.2543 Td (2334 goto out;) 87.3703 Tj 0 -360.7477 Td (2335 }) 43.6851 Tj 0 -370.2411 Td (2336 }) 34.9481 Tj 0 -379.7344 Td (2337 // Insert p before r in list.) 157.2665 Tj 0 -389.2278 Td (2338 p->len = len;) 87.3703 Tj 0 -398.7211 Td (2339 p->next = r;) 83.0018 Tj 0 -408.2145 Td (2340 *rp = p;) 65.5277 Tj 0 -417.7079 Td (2341 ) 21.8426 Tj 0 -427.2012 Td (2342 out:) 43.6851 Tj 0 -436.6946 Td (2343 release$&kmem.lock$;) 117.9499 Tj 0 -446.1879 Td (2344 }) 26.2111 Tj 0 -455.6813 Td (2345 ) 21.8426 Tj 0 -465.1747 Td (2346 ) 21.8426 Tj 0 -474.668 Td (2347 ) 21.8426 Tj 0 -484.1614 Td (2348 ) 21.8426 Tj 0 -493.6547 Td (2349 ) 21.8426 Tj 0 -522.1348 Td (Sheet 23) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/kalloc.c Page 3) 170.3721 Tj 0 -28.4801 Td (2350 // Allocate n bytes of physical memory.) 192.2146 Tj 0 -37.9735 Td (2351 // Returns a kernel-segment pointer.) 179.1091 Tj 0 -47.4668 Td (2352 // Returns 0 if the memory cannot be allocated.) 227.1628 Tj 0 -56.9602 Td (2353 char*) 43.6851 Tj 0 -66.4535 Td (2354 kalloc$int n$) 78.6333 Tj 0 -75.9469 Td (2355 {) 26.2111 Tj 0 -85.4403 Td (2356 char *p;) 65.5277 Tj 0 -94.9336 Td (2357 struct run *r, **rp;) 117.9499 Tj 0 -104.427 Td (2358 ) 21.8426 Tj 0 -113.9203 Td (2359 if$n % PAGE || n <= 0$) 126.6869 Tj 0 -123.4137 Td (2360 panic$"kalloc"$;) 109.2129 Tj 0 -132.9071 Td (2361 ) 21.8426 Tj 0 -142.4004 Td (2362 acquire$&kmem.lock$;) 117.9499 Tj 0 -151.8938 Td (2363 for$rp=&kmem.freelist; \(r=*rp$ != 0; rp=&r->next\){) 249.0053 Tj 0 -161.3871 Td (2364 if$r->len >= n${) 109.2129 Tj 0 -170.8805 Td (2365 r->len -= n;) 100.4758 Tj 0 -180.3739 Td (2366 p = $char*$r + r->len;) 144.161 Tj 0 -189.8672 Td (2367 if$r->len == 0$) 113.5814 Tj 0 -199.3606 Td (2368 *rp = r->next;) 117.9499 Tj 0 -208.8539 Td (2369 release$&kmem.lock$;) 135.4239 Tj 0 -218.3473 Td (2370 return p;) 87.3703 Tj 0 -227.8407 Td (2371 }) 43.6851 Tj 0 -237.334 Td (2372 }) 34.9481 Tj 0 -246.8274 Td (2373 release$&kmem.lock$;) 117.9499 Tj 0 -256.3207 Td (2374 ) 21.8426 Tj 0 -265.8141 Td (2375 cprintf$"kalloc: out of memory\\n"$;) 183.4776 Tj 0 -275.3075 Td (2376 return 0;) 69.8962 Tj 0 -284.8008 Td (2377 }) 26.2111 Tj 0 -294.2942 Td (2378 ) 21.8426 Tj 0 -303.7875 Td (2379 ) 21.8426 Tj 0 -313.2809 Td (2380 ) 21.8426 Tj 0 -322.7743 Td (2381 ) 21.8426 Tj 0 -332.2676 Td (2382 ) 21.8426 Tj 0 -341.761 Td (2383 ) 21.8426 Tj 0 -351.2543 Td (2384 ) 21.8426 Tj 0 -360.7477 Td (2385 ) 21.8426 Tj 0 -370.2411 Td (2386 ) 21.8426 Tj 0 -379.7344 Td (2387 ) 21.8426 Tj 0 -389.2278 Td (2388 ) 21.8426 Tj 0 -398.7211 Td (2389 ) 21.8426 Tj 0 -408.2145 Td (2390 ) 21.8426 Tj 0 -417.7079 Td (2391 ) 21.8426 Tj 0 -427.2012 Td (2392 ) 21.8426 Tj 0 -436.6946 Td (2393 ) 21.8426 Tj 0 -446.1879 Td (2394 ) 21.8426 Tj 0 -455.6813 Td (2395 ) 21.8426 Tj 0 -465.1747 Td (2396 ) 21.8426 Tj 0 -474.668 Td (2397 ) 21.8426 Tj 0 -484.1614 Td (2398 ) 21.8426 Tj 0 -493.6547 Td (2399 ) 21.8426 Tj 0 -522.1348 Td (Sheet 23) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 31 31 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/traps.h Page 1) 166.0035 Tj 0 -28.4801 Td (2400 // x86 trap and interrupt constants.) 179.1091 Tj 0 -37.9735 Td (2401 ) 21.8426 Tj 0 -47.4668 Td (2402 // Processor-defined:) 113.5814 Tj 0 -56.9602 Td (2403 #define T_DIVIDE 0 // divide error) 227.1628 Tj 0 -66.4535 Td (2404 #define T_DEBUG 1 // debug exception) 240.2683 Tj 0 -75.9469 Td (2405 #define T_NMI 2 // non-maskable interrupt) 270.8479 Tj 0 -85.4403 Td (2406 #define T_BRKPT 3 // breakpoint) 218.4257 Tj 0 -94.9336 Td (2407 #define T_OFLOW 4 // overflow) 209.6887 Tj 0 -104.427 Td (2408 #define T_BOUND 5 // bounds check) 227.1628 Tj 0 -113.9203 Td (2409 #define T_ILLOP 6 // illegal opcode) 235.8998 Tj 0 -123.4137 Td (2410 #define T_DEVICE 7 // device not available) 262.1109 Tj 0 -132.9071 Td (2411 #define T_DBLFLT 8 // double fault) 227.1628 Tj 0 -142.4004 Td (2412 // #define T_COPROC 9 // reserved $not used sin\ ce 486$) 301.4275 Tj 0 -151.8938 Td (2413 #define T_TSS 10 // invalid task switch seg\ ment) 292.6905 Tj 0 -161.3871 Td (2414 #define T_SEGNP 11 // segment not present) 257.7424 Tj 0 -170.8805 Td (2415 #define T_STACK 12 // stack exception) 240.2683 Tj 0 -180.3739 Td (2416 #define T_GPFLT 13 // general protection faul\ t) 279.5849 Tj 0 -189.8672 Td (2417 #define T_PGFLT 14 // page fault) 218.4257 Tj 0 -199.3606 Td (2418 // #define T_RES 15 // reserved) 209.6887 Tj 0 -208.8539 Td (2419 #define T_FPERR 16 // floating point error) 262.1109 Tj 0 -218.3473 Td (2420 #define T_ALIGN 17 // aligment check) 235.8998 Tj 0 -227.8407 Td (2421 #define T_MCHK 18 // machine check) 231.5313 Tj 0 -237.334 Td (2422 #define T_SIMDERR 19 // SIMD floating point err\ or) 283.9534 Tj 0 -246.8274 Td (2423 ) 21.8426 Tj 0 -256.3207 Td (2424 // These are arbitrarily chosen, but with care not to over\ lap) 288.322 Tj 0 -265.8141 Td (2425 // processor defined exceptions or interrupt vectors.) 253.3738 Tj 0 -275.3075 Td (2426 #define T_SYSCALL 64 // system call) 218.4257 Tj 0 -284.8008 Td (2427 #define T_DEFAULT 500 // catchall) 209.6887 Tj 0 -294.2942 Td (2428 ) 21.8426 Tj 0 -303.7875 Td (2429 #define T_IRQ0 32 // IRQ 0 corresponds to in\ t T_IRQ) 305.796 Tj 0 -313.2809 Td (2430 ) 21.8426 Tj 0 -322.7743 Td (2431 #define IRQ_TIMER 0) 135.4239 Tj 0 -332.2676 Td (2432 #define IRQ_KBD 1) 135.4239 Tj 0 -341.761 Td (2433 #define IRQ_COM1 4) 135.4239 Tj 0 -351.2543 Td (2434 #define IRQ_IDE 14) 135.4239 Tj 0 -360.7477 Td (2435 #define IRQ_ERROR 19) 135.4239 Tj 0 -370.2411 Td (2436 #define IRQ_SPURIOUS 31) 135.4239 Tj 0 -379.7344 Td (2437 ) 21.8426 Tj 0 -389.2278 Td (2438 ) 21.8426 Tj 0 -398.7211 Td (2439 ) 21.8426 Tj 0 -408.2145 Td (2440 ) 21.8426 Tj 0 -417.7079 Td (2441 ) 21.8426 Tj 0 -427.2012 Td (2442 ) 21.8426 Tj 0 -436.6946 Td (2443 ) 21.8426 Tj 0 -446.1879 Td (2444 ) 21.8426 Tj 0 -455.6813 Td (2445 ) 21.8426 Tj 0 -465.1747 Td (2446 ) 21.8426 Tj 0 -474.668 Td (2447 ) 21.8426 Tj 0 -484.1614 Td (2448 ) 21.8426 Tj 0 -493.6547 Td (2449 ) 21.8426 Tj 0 -522.1348 Td (Sheet 24) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/vectors.pl Page 1) 179.1091 Tj 0 -28.4801 Td (2450 #!/usr/bin/perl -w) 100.4758 Tj 0 -37.9735 Td (2451 ) 21.8426 Tj 0 -47.4668 Td (2452 # Generate vectors.S, the trap/interrupt entry points.) 257.7424 Tj 0 -56.9602 Td (2453 # There has to be one entry point per interrupt number) 257.7424 Tj 0 -66.4535 Td (2454 # since otherwise there's no way for trap to discover) 262.1109 Tj 0 -75.9469 Td (2455 # the interrupt number.) 122.3184 Tj 0 -85.4403 Td (2456 ) 21.8426 Tj 0 -94.9336 Td (2457 print "# generated by vectors.pl - do not edit\\n";) 240.2683 Tj 0 -104.427 Td (2458 print "# handlers\\n";) 113.5814 Tj 0 -113.9203 Td (2459 print ".globl alltraps\\n";) 135.4239 Tj 0 -123.4137 Td (2460 for$my $i = 0; $i < 256; $i++${) 157.2665 Tj 0 -132.9071 Td (2461 print ".globl vector$i\\n";) 152.898 Tj 0 -142.4004 Td (2462 print "vector$i:\\n";) 126.6869 Tj 0 -151.8938 Td (2463 if$!\($i == 8 || \($i >= 10 && $i <= 14$ || $i == 17\ \)\){) 270.8479 Tj 0 -161.3871 Td (2464 print " pushl \\$0\\n";) 152.898 Tj 0 -170.8805 Td (2465 }) 43.6851 Tj 0 -180.3739 Td (2466 print " pushl \\$$i\\n";) 139.7925 Tj 0 -189.8672 Td (2467 print " jmp alltraps\\n";) 148.5295 Tj 0 -199.3606 Td (2468 }) 26.2111 Tj 0 -208.8539 Td (2469 ) 21.8426 Tj 0 -218.3473 Td (2470 print "\\n# vector table\\n";) 139.7925 Tj 0 -227.8407 Td (2471 print ".data\\n";) 91.7388 Tj 0 -237.334 Td (2472 print ".globl vectors\\n";) 131.0554 Tj 0 -246.8274 Td (2473 print "vectors:\\n";) 104.8443 Tj 0 -256.3207 Td (2474 for$my $i = 0; $i < 256; $i++${) 157.2665 Tj 0 -265.8141 Td (2475 print " .long vector$i\\n";) 157.2665 Tj 0 -275.3075 Td (2476 }) 26.2111 Tj 0 -284.8008 Td (2477 ) 21.8426 Tj 0 -294.2942 Td (2478 # sample output:) 91.7388 Tj 0 -303.7875 Td (2479 # # handlers) 83.0018 Tj 0 -313.2809 Td (2480 # .globl alltraps) 104.8443 Tj 0 -322.7743 Td (2481 # .globl vector0) 100.4758 Tj 0 -332.2676 Td (2482 # vector0:) 74.2647 Tj 0 -341.761 Td (2483 # pushl $0) 83.0018 Tj 0 -351.2543 Td (2484 # pushl $0) 83.0018 Tj 0 -360.7477 Td (2485 # jmp alltraps) 100.4758 Tj 0 -370.2411 Td (2486 # ...) 52.4222 Tj 0 -379.7344 Td (2487 #) 26.2111 Tj 0 -389.2278 Td (2488 # # vector table) 100.4758 Tj 0 -398.7211 Td (2489 # .data) 61.1592 Tj 0 -408.2145 Td (2490 # .globl vectors) 100.4758 Tj 0 -417.7079 Td (2491 # vectors:) 74.2647 Tj 0 -427.2012 Td (2492 # .long vector0) 104.8443 Tj 0 -436.6946 Td (2493 # .long vector1) 104.8443 Tj 0 -446.1879 Td (2494 # .long vector2) 104.8443 Tj 0 -455.6813 Td (2495 # ...) 52.4222 Tj 0 -465.1747 Td (2496 ) 21.8426 Tj 0 -474.668 Td (2497 ) 21.8426 Tj 0 -484.1614 Td (2498 ) 21.8426 Tj 0 -493.6547 Td (2499 ) 21.8426 Tj 0 -522.1348 Td (Sheet 24) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 32 32 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/trapasm.S Page 1) 174.7406 Tj 0 -28.4801 Td (2500 #define SEG_KCODE 1 // kernel code) 174.7406 Tj 0 -37.9735 Td (2501 #define SEG_KDATA 2 // kernel data+stack) 200.9517 Tj 0 -47.4668 Td (2502 #define SEG_KCPU 3 // kernel per-cpu data) 209.6887 Tj 0 -56.9602 Td (2503 ) 21.8426 Tj 0 -66.4535 Td (2504 # vectors.S sends all traps here.) 174.7406 Tj 0 -75.9469 Td (2505 .globl alltraps) 87.3703 Tj 0 -85.4403 Td (2506 alltraps:) 61.1592 Tj 0 -94.9336 Td (2507 # Build trap frame.) 113.5814 Tj 0 -104.427 Td (2508 pushl %ds) 69.8962 Tj 0 -113.9203 Td (2509 pushl %es) 69.8962 Tj 0 -123.4137 Td (2510 pushl %fs) 69.8962 Tj 0 -132.9071 Td (2511 pushl %gs) 69.8962 Tj 0 -142.4004 Td (2512 pushal) 56.7907 Tj 0 -151.8938 Td (2513 ) 21.8426 Tj 0 -161.3871 Td (2514 # Set up data and per-cpu segments.) 183.4776 Tj 0 -170.8805 Td (2515 movw $$SEG_KDATA<<3$, %ax) 139.7925 Tj 0 -180.3739 Td (2516 movw %ax, %ds) 87.3703 Tj 0 -189.8672 Td (2517 movw %ax, %es) 87.3703 Tj 0 -199.3606 Td (2518 movw $$SEG_KCPU<<3$, %ax) 135.4239 Tj 0 -208.8539 Td (2519 movw %ax, %fs) 87.3703 Tj 0 -218.3473 Td (2520 movw %ax, %gs) 87.3703 Tj 0 -227.8407 Td (2521 ) 21.8426 Tj 0 -237.334 Td (2522 # Call trap$tf$, where tf=%esp) 161.635 Tj 0 -246.8274 Td (2523 pushl %esp) 74.2647 Tj 0 -256.3207 Td (2524 call trap) 69.8962 Tj 0 -265.8141 Td (2525 addl $4, %esp) 87.3703 Tj 0 -275.3075 Td (2526 ) 21.8426 Tj 0 -284.8008 Td (2527 # Return falls through to trapret...) 187.8461 Tj 0 -294.2942 Td (2528 .globl trapret) 83.0018 Tj 0 -303.7875 Td (2529 trapret:) 56.7907 Tj 0 -313.2809 Td (2530 popal) 52.4222 Tj 0 -322.7743 Td (2531 popl %gs) 65.5277 Tj 0 -332.2676 Td (2532 popl %fs) 65.5277 Tj 0 -341.761 Td (2533 popl %es) 65.5277 Tj 0 -351.2543 Td (2534 popl %ds) 65.5277 Tj 0 -360.7477 Td (2535 addl $0x8, %esp # trapno and errcode) 192.2146 Tj 0 -370.2411 Td (2536 iret) 48.0537 Tj 0 -379.7344 Td (2537 ) 21.8426 Tj 0 -389.2278 Td (2538 ) 21.8426 Tj 0 -398.7211 Td (2539 ) 21.8426 Tj 0 -408.2145 Td (2540 ) 21.8426 Tj 0 -417.7079 Td (2541 ) 21.8426 Tj 0 -427.2012 Td (2542 ) 21.8426 Tj 0 -436.6946 Td (2543 ) 21.8426 Tj 0 -446.1879 Td (2544 ) 21.8426 Tj 0 -455.6813 Td (2545 ) 21.8426 Tj 0 -465.1747 Td (2546 ) 21.8426 Tj 0 -474.668 Td (2547 ) 21.8426 Tj 0 -484.1614 Td (2548 ) 21.8426 Tj 0 -493.6547 Td (2549 ) 21.8426 Tj 0 -522.1348 Td (Sheet 25) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/trap.c Page 1) 161.635 Tj 0 -28.4801 Td (2550 #include "types.h") 100.4758 Tj 0 -37.9735 Td (2551 #include "defs.h") 96.1073 Tj 0 -47.4668 Td (2552 #include "param.h") 100.4758 Tj 0 -56.9602 Td (2553 #include "mmu.h") 91.7388 Tj 0 -66.4535 Td (2554 #include "proc.h") 96.1073 Tj 0 -75.9469 Td (2555 #include "x86.h") 91.7388 Tj 0 -85.4403 Td (2556 #include "traps.h") 100.4758 Tj 0 -94.9336 Td (2557 #include "spinlock.h") 113.5814 Tj 0 -104.427 Td (2558 ) 21.8426 Tj 0 -113.9203 Td (2559 // Interrupt descriptor table $shared by all CPUs$.) 244.6368 Tj 0 -123.4137 Td (2560 struct gatedesc idt[256];) 131.0554 Tj 0 -132.9071 Td (2561 extern uint vectors[]; // in vectors.S: array of 256 entr\ y pointers) 318.9016 Tj 0 -142.4004 Td (2562 struct spinlock tickslock;) 135.4239 Tj 0 -151.8938 Td (2563 int ticks;) 65.5277 Tj 0 -161.3871 Td (2564 ) 21.8426 Tj 0 -170.8805 Td (2565 void) 39.3166 Tj 0 -180.3739 Td (2566 tvinit$void$) 74.2647 Tj 0 -189.8672 Td (2567 {) 26.2111 Tj 0 -199.3606 Td (2568 int i;) 56.7907 Tj 0 -208.8539 Td (2569 ) 21.8426 Tj 0 -218.3473 Td (2570 for$i = 0; i < 256; i++$) 135.4239 Tj 0 -227.8407 Td (2571 SETGATE$idt[i], 0, SEG_KCODE<<3, vectors[i], 0$;) 249.0053 Tj 0 -237.334 Td (2572 SETGATE$idt[T_SYSCALL], 1, SEG_KCODE<<3, vectors[T_SYSC\ ALL], DPL_USER$;) 340.7441 Tj 0 -246.8274 Td (2573 ) 21.8426 Tj 0 -256.3207 Td (2574 initlock$&tickslock, "time"$;) 157.2665 Tj 0 -265.8141 Td (2575 }) 26.2111 Tj 0 -275.3075 Td (2576 ) 21.8426 Tj 0 -284.8008 Td (2577 void) 39.3166 Tj 0 -294.2942 Td (2578 idtinit$void$) 78.6333 Tj 0 -303.7875 Td (2579 {) 26.2111 Tj 0 -313.2809 Td (2580 lidt$idt, sizeof\(idt$\);) 131.0554 Tj 0 -322.7743 Td (2581 }) 26.2111 Tj 0 -332.2676 Td (2582 ) 21.8426 Tj 0 -341.761 Td (2583 ) 21.8426 Tj 0 -351.2543 Td (2584 ) 21.8426 Tj 0 -360.7477 Td (2585 ) 21.8426 Tj 0 -370.2411 Td (2586 ) 21.8426 Tj 0 -379.7344 Td (2587 ) 21.8426 Tj 0 -389.2278 Td (2588 ) 21.8426 Tj 0 -398.7211 Td (2589 ) 21.8426 Tj 0 -408.2145 Td (2590 ) 21.8426 Tj 0 -417.7079 Td (2591 ) 21.8426 Tj 0 -427.2012 Td (2592 ) 21.8426 Tj 0 -436.6946 Td (2593 ) 21.8426 Tj 0 -446.1879 Td (2594 ) 21.8426 Tj 0 -455.6813 Td (2595 ) 21.8426 Tj 0 -465.1747 Td (2596 ) 21.8426 Tj 0 -474.668 Td (2597 ) 21.8426 Tj 0 -484.1614 Td (2598 ) 21.8426 Tj 0 -493.6547 Td (2599 ) 21.8426 Tj 0 -522.1348 Td (Sheet 25) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 33 33 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/trap.c Page 2) 161.635 Tj 0 -28.4801 Td (2600 void) 39.3166 Tj 0 -37.9735 Td (2601 trap$struct trapframe *tf$) 135.4239 Tj 0 -47.4668 Td (2602 {) 26.2111 Tj 0 -56.9602 Td (2603 if$tf->trapno == T_SYSCALL${) 152.898 Tj 0 -66.4535 Td (2604 if$proc->killed$) 109.2129 Tj 0 -75.9469 Td (2605 exit;) 78.6333 Tj 0 -85.4403 Td (2606 proc->tf = tf;) 100.4758 Tj 0 -94.9336 Td (2607 syscall;) 83.0018 Tj 0 -104.427 Td (2608 if$proc->killed$) 109.2129 Tj 0 -113.9203 Td (2609 exit;) 78.6333 Tj 0 -123.4137 Td (2610 return;) 69.8962 Tj 0 -132.9071 Td (2611 }) 34.9481 Tj 0 -142.4004 Td (2612 ) 21.8426 Tj 0 -151.8938 Td (2613 switch$tf->trapno${) 113.5814 Tj 0 -161.3871 Td (2614 case T_IRQ0 + IRQ_TIMER:) 135.4239 Tj 0 -170.8805 Td (2615 if$cpu->id == 0${) 113.5814 Tj 0 -180.3739 Td (2616 acquire$&tickslock$;) 135.4239 Tj 0 -189.8672 Td (2617 ticks++;) 83.0018 Tj 0 -199.3606 Td (2618 wakeup$&ticks$;) 113.5814 Tj 0 -208.8539 Td (2619 release$&tickslock$;) 135.4239 Tj 0 -218.3473 Td (2620 }) 43.6851 Tj 0 -227.8407 Td (2621 lapiceoi;) 87.3703 Tj 0 -237.334 Td (2622 break;) 65.5277 Tj 0 -246.8274 Td (2623 case T_IRQ0 + IRQ_IDE:) 126.6869 Tj 0 -256.3207 Td (2624 ideintr;) 83.0018 Tj 0 -265.8141 Td (2625 lapiceoi;) 87.3703 Tj 0 -275.3075 Td (2626 break;) 65.5277 Tj 0 -284.8008 Td (2627 case T_IRQ0 + IRQ_KBD:) 126.6869 Tj 0 -294.2942 Td (2628 kbdintr;) 83.0018 Tj 0 -303.7875 Td (2629 lapiceoi;) 87.3703 Tj 0 -313.2809 Td (2630 break;) 65.5277 Tj 0 -322.7743 Td (2631 case T_IRQ0 + IRQ_COM1:) 131.0554 Tj 0 -332.2676 Td (2632 uartintr;) 87.3703 Tj 0 -341.761 Td (2633 lapiceoi;) 87.3703 Tj 0 -351.2543 Td (2634 break;) 65.5277 Tj 0 -360.7477 Td (2635 case T_IRQ0 + 7:) 100.4758 Tj 0 -370.2411 Td (2636 case T_IRQ0 + IRQ_SPURIOUS:) 148.5295 Tj 0 -379.7344 Td (2637 cprintf$"cpu%d: spurious interrupt at %x:%x\\n",) 244.6368 Tj 0 -389.2278 Td (2638 cpu->id, tf->cs, tf->eip$;) 187.8461 Tj 0 -398.7211 Td (2639 lapiceoi;) 87.3703 Tj 0 -408.2145 Td (2640 break;) 65.5277 Tj 0 -417.7079 Td (2641 ) 21.8426 Tj 0 -427.2012 Td (2642 ) 21.8426 Tj 0 -436.6946 Td (2643 ) 21.8426 Tj 0 -446.1879 Td (2644 ) 21.8426 Tj 0 -455.6813 Td (2645 ) 21.8426 Tj 0 -465.1747 Td (2646 ) 21.8426 Tj 0 -474.668 Td (2647 ) 21.8426 Tj 0 -484.1614 Td (2648 ) 21.8426 Tj 0 -493.6547 Td (2649 ) 21.8426 Tj 0 -522.1348 Td (Sheet 26) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/trap.c Page 3) 161.635 Tj 0 -28.4801 Td (2650 default:) 65.5277 Tj 0 -37.9735 Td (2651 if$proc == 0 || \(tf->cs&3$ == 0\){) 183.4776 Tj 0 -47.4668 Td (2652 // In kernel, it must be our mistake.) 209.6887 Tj 0 -56.9602 Td (2653 cprintf$"unexpected trap %d from cpu %d eip %x\\n",) 266.4794 Tj 0 -66.4535 Td (2654 tf->trapno, cpu->id, tf->eip$;) 214.0572 Tj 0 -75.9469 Td (2655 panic$"trap"$;) 109.2129 Tj 0 -85.4403 Td (2656 }) 43.6851 Tj 0 -94.9336 Td (2657 // In user space, assume process misbehaved.) 231.5313 Tj 0 -104.427 Td (2658 cprintf$"pid %d %s: trap %d err %d on cpu %d eip %x -\ - kill proc\\n",) 336.3756 Tj 0 -113.9203 Td (2659 proc->pid, proc->name, tf->trapno, tf->err, cp\ u->id, tf->eip$;) 345.1126 Tj 0 -123.4137 Td (2660 proc->killed = 1;) 113.5814 Tj 0 -132.9071 Td (2661 }) 34.9481 Tj 0 -142.4004 Td (2662 ) 21.8426 Tj 0 -151.8938 Td (2663 // Force process exit if it has been killed and is in us\ er space.) 314.533 Tj 0 -161.3871 Td (2664 // $If it is still executing in the kernel, let it keep\ running) 305.796 Tj 0 -170.8805 Td (2665 // until it gets to the regular system call return.$) 257.7424 Tj 0 -180.3739 Td (2666 if$proc && proc->killed && \(tf->cs&3$ == DPL_USER\)) 249.0053 Tj 0 -189.8672 Td (2667 exit;) 69.8962 Tj 0 -199.3606 Td (2668 ) 21.8426 Tj 0 -208.8539 Td (2669 // Force process to give up CPU on clock tick.) 231.5313 Tj 0 -218.3473 Td (2670 // If interrupts were on while locks held, would need to\ check nlock.) 332.0071 Tj 0 -227.8407 Td (2671 if$proc && proc->state == RUNNING && tf->trapno == T_IR\ Q0+IRQ_TIMER$) 327.6386 Tj 0 -237.334 Td (2672 yield;) 74.2647 Tj 0 -246.8274 Td (2673 ) 21.8426 Tj 0 -256.3207 Td (2674 // Check if the process has been killed since we yielded) 275.2164 Tj 0 -265.8141 Td (2675 if$proc && proc->killed && \(tf->cs&3$ == DPL_USER\)) 249.0053 Tj 0 -275.3075 Td (2676 exit;) 69.8962 Tj 0 -284.8008 Td (2677 }) 26.2111 Tj 0 -294.2942 Td (2678 ) 21.8426 Tj 0 -303.7875 Td (2679 ) 21.8426 Tj 0 -313.2809 Td (2680 ) 21.8426 Tj 0 -322.7743 Td (2681 ) 21.8426 Tj 0 -332.2676 Td (2682 ) 21.8426 Tj 0 -341.761 Td (2683 ) 21.8426 Tj 0 -351.2543 Td (2684 ) 21.8426 Tj 0 -360.7477 Td (2685 ) 21.8426 Tj 0 -370.2411 Td (2686 ) 21.8426 Tj 0 -379.7344 Td (2687 ) 21.8426 Tj 0 -389.2278 Td (2688 ) 21.8426 Tj 0 -398.7211 Td (2689 ) 21.8426 Tj 0 -408.2145 Td (2690 ) 21.8426 Tj 0 -417.7079 Td (2691 ) 21.8426 Tj 0 -427.2012 Td (2692 ) 21.8426 Tj 0 -436.6946 Td (2693 ) 21.8426 Tj 0 -446.1879 Td (2694 ) 21.8426 Tj 0 -455.6813 Td (2695 ) 21.8426 Tj 0 -465.1747 Td (2696 ) 21.8426 Tj 0 -474.668 Td (2697 ) 21.8426 Tj 0 -484.1614 Td (2698 ) 21.8426 Tj 0 -493.6547 Td (2699 ) 21.8426 Tj 0 -522.1348 Td (Sheet 26) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 34 34 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/syscall.h Page 1) 174.7406 Tj 0 -28.4801 Td (2700 // System call numbers) 117.9499 Tj 0 -37.9735 Td (2701 #define SYS_fork 1) 113.5814 Tj 0 -47.4668 Td (2702 #define SYS_exit 2) 113.5814 Tj 0 -56.9602 Td (2703 #define SYS_wait 3) 113.5814 Tj 0 -66.4535 Td (2704 #define SYS_pipe 4) 113.5814 Tj 0 -75.9469 Td (2705 #define SYS_write 5) 113.5814 Tj 0 -85.4403 Td (2706 #define SYS_read 6) 113.5814 Tj 0 -94.9336 Td (2707 #define SYS_close 7) 113.5814 Tj 0 -104.427 Td (2708 #define SYS_kill 8) 113.5814 Tj 0 -113.9203 Td (2709 #define SYS_exec 9) 113.5814 Tj 0 -123.4137 Td (2710 #define SYS_open 10) 113.5814 Tj 0 -132.9071 Td (2711 #define SYS_mknod 11) 113.5814 Tj 0 -142.4004 Td (2712 #define SYS_unlink 12) 113.5814 Tj 0 -151.8938 Td (2713 #define SYS_fstat 13) 113.5814 Tj 0 -161.3871 Td (2714 #define SYS_link 14) 113.5814 Tj 0 -170.8805 Td (2715 #define SYS_mkdir 15) 113.5814 Tj 0 -180.3739 Td (2716 #define SYS_chdir 16) 113.5814 Tj 0 -189.8672 Td (2717 #define SYS_dup 17) 113.5814 Tj 0 -199.3606 Td (2718 #define SYS_getpid 18) 113.5814 Tj 0 -208.8539 Td (2719 #define SYS_sbrk 19) 113.5814 Tj 0 -218.3473 Td (2720 #define SYS_sleep 20) 113.5814 Tj 0 -227.8407 Td (2721 ) 21.8426 Tj 0 -237.334 Td (2722 ) 21.8426 Tj 0 -246.8274 Td (2723 ) 21.8426 Tj 0 -256.3207 Td (2724 ) 21.8426 Tj 0 -265.8141 Td (2725 ) 21.8426 Tj 0 -275.3075 Td (2726 ) 21.8426 Tj 0 -284.8008 Td (2727 ) 21.8426 Tj 0 -294.2942 Td (2728 ) 21.8426 Tj 0 -303.7875 Td (2729 ) 21.8426 Tj 0 -313.2809 Td (2730 ) 21.8426 Tj 0 -322.7743 Td (2731 ) 21.8426 Tj 0 -332.2676 Td (2732 ) 21.8426 Tj 0 -341.761 Td (2733 ) 21.8426 Tj 0 -351.2543 Td (2734 ) 21.8426 Tj 0 -360.7477 Td (2735 ) 21.8426 Tj 0 -370.2411 Td (2736 ) 21.8426 Tj 0 -379.7344 Td (2737 ) 21.8426 Tj 0 -389.2278 Td (2738 ) 21.8426 Tj 0 -398.7211 Td (2739 ) 21.8426 Tj 0 -408.2145 Td (2740 ) 21.8426 Tj 0 -417.7079 Td (2741 ) 21.8426 Tj 0 -427.2012 Td (2742 ) 21.8426 Tj 0 -436.6946 Td (2743 ) 21.8426 Tj 0 -446.1879 Td (2744 ) 21.8426 Tj 0 -455.6813 Td (2745 ) 21.8426 Tj 0 -465.1747 Td (2746 ) 21.8426 Tj 0 -474.668 Td (2747 ) 21.8426 Tj 0 -484.1614 Td (2748 ) 21.8426 Tj 0 -493.6547 Td (2749 ) 21.8426 Tj 0 -522.1348 Td (Sheet 27) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/syscall.c Page 1) 174.7406 Tj 0 -28.4801 Td (2750 #include "types.h") 100.4758 Tj 0 -37.9735 Td (2751 #include "defs.h") 96.1073 Tj 0 -47.4668 Td (2752 #include "param.h") 100.4758 Tj 0 -56.9602 Td (2753 #include "mmu.h") 91.7388 Tj 0 -66.4535 Td (2754 #include "proc.h") 96.1073 Tj 0 -75.9469 Td (2755 #include "x86.h") 91.7388 Tj 0 -85.4403 Td (2756 #include "syscall.h") 109.2129 Tj 0 -94.9336 Td (2757 ) 21.8426 Tj 0 -104.427 Td (2758 // User code makes a system call with INT T_SYSCALL.) 249.0053 Tj 0 -113.9203 Td (2759 // System call number in %eax.) 152.898 Tj 0 -123.4137 Td (2760 // Arguments on the stack, from the user call to the C) 257.7424 Tj 0 -132.9071 Td (2761 // library system call function. The saved user %esp point\ s) 279.5849 Tj 0 -142.4004 Td (2762 // to a saved program counter, and then the first argument\ .) 279.5849 Tj 0 -151.8938 Td (2763 ) 21.8426 Tj 0 -161.3871 Td (2764 // Fetch the int at addr from process p.) 196.5831 Tj 0 -170.8805 Td (2765 int) 34.9481 Tj 0 -180.3739 Td (2766 fetchint$struct proc *p, uint addr, int *ip$) 214.0572 Tj 0 -189.8672 Td (2767 {) 26.2111 Tj 0 -199.3606 Td (2768 if$addr >= p->sz || addr+4 > p->sz$) 183.4776 Tj 0 -208.8539 Td (2769 return -1;) 83.0018 Tj 0 -218.3473 Td (2770 *ip = *$int*$$p->mem + addr$;) 157.2665 Tj 0 -227.8407 Td (2771 return 0;) 69.8962 Tj 0 -237.334 Td (2772 }) 26.2111 Tj 0 -246.8274 Td (2773 ) 21.8426 Tj 0 -256.3207 Td (2774 // Fetch the nul-terminated string at addr from process p.) 275.2164 Tj 0 -265.8141 Td (2775 // Doesn't actually copy the string - just sets *pp to poi\ nt at it.) 314.533 Tj 0 -275.3075 Td (2776 // Returns length of string, not including nul.) 227.1628 Tj 0 -284.8008 Td (2777 int) 34.9481 Tj 0 -294.2942 Td (2778 fetchstr$struct proc *p, uint addr, char **pp$) 222.7942 Tj 0 -303.7875 Td (2779 {) 26.2111 Tj 0 -313.2809 Td (2780 char *s, *ep;) 87.3703 Tj 0 -322.7743 Td (2781 ) 21.8426 Tj 0 -332.2676 Td (2782 if$addr >= p->sz$) 104.8443 Tj 0 -341.761 Td (2783 return -1;) 83.0018 Tj 0 -351.2543 Td (2784 *pp = p->mem + addr;) 117.9499 Tj 0 -360.7477 Td (2785 ep = p->mem + p->sz;) 117.9499 Tj 0 -370.2411 Td (2786 for$s = *pp; s < ep; s++$) 139.7925 Tj 0 -379.7344 Td (2787 if$*s == 0$) 87.3703 Tj 0 -389.2278 Td (2788 return s - *pp;) 113.5814 Tj 0 -398.7211 Td (2789 return -1;) 74.2647 Tj 0 -408.2145 Td (2790 }) 26.2111 Tj 0 -417.7079 Td (2791 ) 21.8426 Tj 0 -427.2012 Td (2792 // Fetch the nth 32-bit system call argument.) 218.4257 Tj 0 -436.6946 Td (2793 int) 34.9481 Tj 0 -446.1879 Td (2794 argint$int n, int *ip$) 117.9499 Tj 0 -455.6813 Td (2795 {) 26.2111 Tj 0 -465.1747 Td (2796 return fetchint$proc, proc->tf->esp + 4 + 4*n, ip$;) 253.3738 Tj 0 -474.668 Td (2797 }) 26.2111 Tj 0 -484.1614 Td (2798 ) 21.8426 Tj 0 -493.6547 Td (2799 ) 21.8426 Tj 0 -522.1348 Td (Sheet 27) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 35 35 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/syscall.c Page 2) 174.7406 Tj 0 -28.4801 Td (2800 // Fetch the nth word-sized system call argument as a poin\ ter) 288.322 Tj 0 -37.9735 Td (2801 // to a block of memory of size n bytes. Check that the p\ ointer) 301.4275 Tj 0 -47.4668 Td (2802 // lies within the process address space.) 200.9517 Tj 0 -56.9602 Td (2803 int) 34.9481 Tj 0 -66.4535 Td (2804 argptr$int n, char **pp, int size$) 170.3721 Tj 0 -75.9469 Td (2805 {) 26.2111 Tj 0 -85.4403 Td (2806 int i;) 56.7907 Tj 0 -94.9336 Td (2807 ) 21.8426 Tj 0 -104.427 Td (2808 if$argint\(n, &i$ < 0\)) 122.3184 Tj 0 -113.9203 Td (2809 return -1;) 83.0018 Tj 0 -123.4137 Td (2810 if$\(uint$i >= proc->sz || $uint$i+size >= proc->sz\)) 253.3738 Tj 0 -132.9071 Td (2811 return -1;) 83.0018 Tj 0 -142.4004 Td (2812 *pp = proc->mem + i;) 117.9499 Tj 0 -151.8938 Td (2813 return 0;) 69.8962 Tj 0 -161.3871 Td (2814 }) 26.2111 Tj 0 -170.8805 Td (2815 ) 21.8426 Tj 0 -180.3739 Td (2816 // Fetch the nth word-sized system call argument as a stri\ ng pointer.) 323.2701 Tj 0 -189.8672 Td (2817 // Check that the pointer is valid and the string is nul-t\ erminated.) 318.9016 Tj 0 -199.3606 Td (2818 // $There is no shared writable memory, so the string can\ 't change) 310.1645 Tj 0 -208.8539 Td (2819 // between this check and being used by the kernel.$) 249.0053 Tj 0 -218.3473 Td (2820 int) 34.9481 Tj 0 -227.8407 Td (2821 argstr$int n, char **pp$) 126.6869 Tj 0 -237.334 Td (2822 {) 26.2111 Tj 0 -246.8274 Td (2823 int addr;) 69.8962 Tj 0 -256.3207 Td (2824 if$argint\(n, &addr$ < 0\)) 135.4239 Tj 0 -265.8141 Td (2825 return -1;) 83.0018 Tj 0 -275.3075 Td (2826 return fetchstr$proc, addr, pp$;) 170.3721 Tj 0 -284.8008 Td (2827 }) 26.2111 Tj 0 -294.2942 Td (2828 ) 21.8426 Tj 0 -303.7875 Td (2829 extern int sys_chdir$void$;) 139.7925 Tj 0 -313.2809 Td (2830 extern int sys_close$void$;) 139.7925 Tj 0 -322.7743 Td (2831 extern int sys_dup$void$;) 131.0554 Tj 0 -332.2676 Td (2832 extern int sys_exec$void$;) 135.4239 Tj 0 -341.761 Td (2833 extern int sys_exit$void$;) 135.4239 Tj 0 -351.2543 Td (2834 extern int sys_fork$void$;) 135.4239 Tj 0 -360.7477 Td (2835 extern int sys_fstat$void$;) 139.7925 Tj 0 -370.2411 Td (2836 extern int sys_getpid$void$;) 144.161 Tj 0 -379.7344 Td (2837 extern int sys_kill$void$;) 135.4239 Tj 0 -389.2278 Td (2838 extern int sys_link$void$;) 135.4239 Tj 0 -398.7211 Td (2839 extern int sys_mkdir$void$;) 139.7925 Tj 0 -408.2145 Td (2840 extern int sys_mknod$void$;) 139.7925 Tj 0 -417.7079 Td (2841 extern int sys_open$void$;) 135.4239 Tj 0 -427.2012 Td (2842 extern int sys_pipe$void$;) 135.4239 Tj 0 -436.6946 Td (2843 extern int sys_read$void$;) 135.4239 Tj 0 -446.1879 Td (2844 extern int sys_sbrk$void$;) 135.4239 Tj 0 -455.6813 Td (2845 extern int sys_sleep$void$;) 139.7925 Tj 0 -465.1747 Td (2846 extern int sys_unlink$void$;) 144.161 Tj 0 -474.668 Td (2847 extern int sys_wait$void$;) 135.4239 Tj 0 -484.1614 Td (2848 extern int sys_write$void$;) 139.7925 Tj 0 -493.6547 Td (2849 ) 21.8426 Tj 0 -522.1348 Td (Sheet 28) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/syscall.c Page 3) 174.7406 Tj 0 -28.4801 Td (2850 static int $*syscalls[]$$void$ = {) 170.3721 Tj 0 -37.9735 Td (2851 [SYS_chdir] sys_chdir,) 126.6869 Tj 0 -47.4668 Td (2852 [SYS_close] sys_close,) 126.6869 Tj 0 -56.9602 Td (2853 [SYS_dup] sys_dup,) 117.9499 Tj 0 -66.4535 Td (2854 [SYS_exec] sys_exec,) 122.3184 Tj 0 -75.9469 Td (2855 [SYS_exit] sys_exit,) 122.3184 Tj 0 -85.4403 Td (2856 [SYS_fork] sys_fork,) 122.3184 Tj 0 -94.9336 Td (2857 [SYS_fstat] sys_fstat,) 126.6869 Tj 0 -104.427 Td (2858 [SYS_getpid] sys_getpid,) 131.0554 Tj 0 -113.9203 Td (2859 [SYS_kill] sys_kill,) 122.3184 Tj 0 -123.4137 Td (2860 [SYS_link] sys_link,) 122.3184 Tj 0 -132.9071 Td (2861 [SYS_mkdir] sys_mkdir,) 126.6869 Tj 0 -142.4004 Td (2862 [SYS_mknod] sys_mknod,) 126.6869 Tj 0 -151.8938 Td (2863 [SYS_open] sys_open,) 122.3184 Tj 0 -161.3871 Td (2864 [SYS_pipe] sys_pipe,) 122.3184 Tj 0 -170.8805 Td (2865 [SYS_read] sys_read,) 122.3184 Tj 0 -180.3739 Td (2866 [SYS_sbrk] sys_sbrk,) 122.3184 Tj 0 -189.8672 Td (2867 [SYS_sleep] sys_sleep,) 126.6869 Tj 0 -199.3606 Td (2868 [SYS_unlink] sys_unlink,) 131.0554 Tj 0 -208.8539 Td (2869 [SYS_wait] sys_wait,) 122.3184 Tj 0 -218.3473 Td (2870 [SYS_write] sys_write,) 126.6869 Tj 0 -227.8407 Td (2871 };) 30.5796 Tj 0 -237.334 Td (2872 ) 21.8426 Tj 0 -246.8274 Td (2873 void) 39.3166 Tj 0 -256.3207 Td (2874 syscall$void$) 78.6333 Tj 0 -265.8141 Td (2875 {) 26.2111 Tj 0 -275.3075 Td (2876 int num;) 65.5277 Tj 0 -284.8008 Td (2877 ) 21.8426 Tj 0 -294.2942 Td (2878 num = proc->tf->eax;) 117.9499 Tj 0 -303.7875 Td (2879 if$num >= 0 && num < NELEM\(syscalls$ && syscalls[num]\ \)) 266.4794 Tj 0 -313.2809 Td (2880 proc->tf->eax = syscalls[num];) 179.1091 Tj 0 -322.7743 Td (2881 else {) 56.7907 Tj 0 -332.2676 Td (2882 cprintf$"%d %s: unknown sys call %d\\n",) 209.6887 Tj 0 -341.761 Td (2883 proc->pid, proc->name, num$;) 196.5831 Tj 0 -351.2543 Td (2884 proc->tf->eax = -1;) 122.3184 Tj 0 -360.7477 Td (2885 }) 34.9481 Tj 0 -370.2411 Td (2886 }) 26.2111 Tj 0 -379.7344 Td (2887 ) 21.8426 Tj 0 -389.2278 Td (2888 ) 21.8426 Tj 0 -398.7211 Td (2889 ) 21.8426 Tj 0 -408.2145 Td (2890 ) 21.8426 Tj 0 -417.7079 Td (2891 ) 21.8426 Tj 0 -427.2012 Td (2892 ) 21.8426 Tj 0 -436.6946 Td (2893 ) 21.8426 Tj 0 -446.1879 Td (2894 ) 21.8426 Tj 0 -455.6813 Td (2895 ) 21.8426 Tj 0 -465.1747 Td (2896 ) 21.8426 Tj 0 -474.668 Td (2897 ) 21.8426 Tj 0 -484.1614 Td (2898 ) 21.8426 Tj 0 -493.6547 Td (2899 ) 21.8426 Tj 0 -522.1348 Td (Sheet 28) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 36 36 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/sysproc.c Page 1) 174.7406 Tj 0 -28.4801 Td (2900 #include "types.h") 100.4758 Tj 0 -37.9735 Td (2901 #include "x86.h") 91.7388 Tj 0 -47.4668 Td (2902 #include "defs.h") 96.1073 Tj 0 -56.9602 Td (2903 #include "param.h") 100.4758 Tj 0 -66.4535 Td (2904 #include "mmu.h") 91.7388 Tj 0 -75.9469 Td (2905 #include "proc.h") 96.1073 Tj 0 -85.4403 Td (2906 ) 21.8426 Tj 0 -94.9336 Td (2907 int) 34.9481 Tj 0 -104.427 Td (2908 sys_fork$void$) 83.0018 Tj 0 -113.9203 Td (2909 {) 26.2111 Tj 0 -123.4137 Td (2910 return fork;) 91.7388 Tj 0 -132.9071 Td (2911 }) 26.2111 Tj 0 -142.4004 Td (2912 ) 21.8426 Tj 0 -151.8938 Td (2913 int) 34.9481 Tj 0 -161.3871 Td (2914 sys_exit$void$) 83.0018 Tj 0 -170.8805 Td (2915 {) 26.2111 Tj 0 -180.3739 Td (2916 exit;) 61.1592 Tj 0 -189.8672 Td (2917 return 0; // not reached) 139.7925 Tj 0 -199.3606 Td (2918 }) 26.2111 Tj 0 -208.8539 Td (2919 ) 21.8426 Tj 0 -218.3473 Td (2920 int) 34.9481 Tj 0 -227.8407 Td (2921 sys_wait$void$) 83.0018 Tj 0 -237.334 Td (2922 {) 26.2111 Tj 0 -246.8274 Td (2923 return wait;) 91.7388 Tj 0 -256.3207 Td (2924 }) 26.2111 Tj 0 -265.8141 Td (2925 ) 21.8426 Tj 0 -275.3075 Td (2926 int) 34.9481 Tj 0 -284.8008 Td (2927 sys_kill$void$) 83.0018 Tj 0 -294.2942 Td (2928 {) 26.2111 Tj 0 -303.7875 Td (2929 int pid;) 65.5277 Tj 0 -313.2809 Td (2930 ) 21.8426 Tj 0 -322.7743 Td (2931 if$argint\(0, &pid$ < 0\)) 131.0554 Tj 0 -332.2676 Td (2932 return -1;) 83.0018 Tj 0 -341.761 Td (2933 return kill$pid$;) 104.8443 Tj 0 -351.2543 Td (2934 }) 26.2111 Tj 0 -360.7477 Td (2935 ) 21.8426 Tj 0 -370.2411 Td (2936 int) 34.9481 Tj 0 -379.7344 Td (2937 sys_getpid$void$) 91.7388 Tj 0 -389.2278 Td (2938 {) 26.2111 Tj 0 -398.7211 Td (2939 return proc->pid;) 104.8443 Tj 0 -408.2145 Td (2940 }) 26.2111 Tj 0 -417.7079 Td (2941 ) 21.8426 Tj 0 -427.2012 Td (2942 ) 21.8426 Tj 0 -436.6946 Td (2943 ) 21.8426 Tj 0 -446.1879 Td (2944 ) 21.8426 Tj 0 -455.6813 Td (2945 ) 21.8426 Tj 0 -465.1747 Td (2946 ) 21.8426 Tj 0 -474.668 Td (2947 ) 21.8426 Tj 0 -484.1614 Td (2948 ) 21.8426 Tj 0 -493.6547 Td (2949 ) 21.8426 Tj 0 -522.1348 Td (Sheet 29) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/sysproc.c Page 2) 174.7406 Tj 0 -28.4801 Td (2950 int) 34.9481 Tj 0 -37.9735 Td (2951 sys_sbrk$void$) 83.0018 Tj 0 -47.4668 Td (2952 {) 26.2111 Tj 0 -56.9602 Td (2953 int addr;) 69.8962 Tj 0 -66.4535 Td (2954 int n;) 56.7907 Tj 0 -75.9469 Td (2955 ) 21.8426 Tj 0 -85.4403 Td (2956 if$argint\(0, &n$ < 0\)) 122.3184 Tj 0 -94.9336 Td (2957 return -1;) 83.0018 Tj 0 -104.427 Td (2958 addr = proc->sz;) 100.4758 Tj 0 -113.9203 Td (2959 if$growproc\(n$ < 0\)) 113.5814 Tj 0 -123.4137 Td (2960 return -1;) 83.0018 Tj 0 -132.9071 Td (2961 return addr;) 83.0018 Tj 0 -142.4004 Td (2962 }) 26.2111 Tj 0 -151.8938 Td (2963 ) 21.8426 Tj 0 -161.3871 Td (2964 int) 34.9481 Tj 0 -170.8805 Td (2965 sys_sleep$void$) 87.3703 Tj 0 -180.3739 Td (2966 {) 26.2111 Tj 0 -189.8672 Td (2967 int n, ticks0;) 91.7388 Tj 0 -199.3606 Td (2968 ) 21.8426 Tj 0 -208.8539 Td (2969 if$argint\(0, &n$ < 0\)) 122.3184 Tj 0 -218.3473 Td (2970 return -1;) 83.0018 Tj 0 -227.8407 Td (2971 acquire$&tickslock$;) 117.9499 Tj 0 -237.334 Td (2972 ticks0 = ticks;) 96.1073 Tj 0 -246.8274 Td (2973 while$ticks - ticks0 < n${) 144.161 Tj 0 -256.3207 Td (2974 if$proc->killed${) 113.5814 Tj 0 -265.8141 Td (2975 release$&tickslock$;) 135.4239 Tj 0 -275.3075 Td (2976 return -1;) 91.7388 Tj 0 -284.8008 Td (2977 }) 43.6851 Tj 0 -294.2942 Td (2978 sleep$&ticks, &tickslock$;) 152.898 Tj 0 -303.7875 Td (2979 }) 34.9481 Tj 0 -313.2809 Td (2980 release$&tickslock$;) 117.9499 Tj 0 -322.7743 Td (2981 return 0;) 69.8962 Tj 0 -332.2676 Td (2982 }) 26.2111 Tj 0 -341.761 Td (2983 ) 21.8426 Tj 0 -351.2543 Td (2984 ) 21.8426 Tj 0 -360.7477 Td (2985 ) 21.8426 Tj 0 -370.2411 Td (2986 ) 21.8426 Tj 0 -379.7344 Td (2987 ) 21.8426 Tj 0 -389.2278 Td (2988 ) 21.8426 Tj 0 -398.7211 Td (2989 ) 21.8426 Tj 0 -408.2145 Td (2990 ) 21.8426 Tj 0 -417.7079 Td (2991 ) 21.8426 Tj 0 -427.2012 Td (2992 ) 21.8426 Tj 0 -436.6946 Td (2993 ) 21.8426 Tj 0 -446.1879 Td (2994 ) 21.8426 Tj 0 -455.6813 Td (2995 ) 21.8426 Tj 0 -465.1747 Td (2996 ) 21.8426 Tj 0 -474.668 Td (2997 ) 21.8426 Tj 0 -484.1614 Td (2998 ) 21.8426 Tj 0 -493.6547 Td (2999 ) 21.8426 Tj 0 -522.1348 Td (Sheet 29) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 37 37 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/buf.h Page 1) 157.2665 Tj 0 -28.4801 Td (3000 struct buf {) 74.2647 Tj 0 -37.9735 Td (3001 int flags;) 74.2647 Tj 0 -47.4668 Td (3002 uint dev;) 69.8962 Tj 0 -56.9602 Td (3003 uint sector;) 83.0018 Tj 0 -66.4535 Td (3004 struct buf *prev; // LRU cache list) 183.4776 Tj 0 -75.9469 Td (3005 struct buf *next;) 104.8443 Tj 0 -85.4403 Td (3006 struct buf *qnext; // disk queue) 170.3721 Tj 0 -94.9336 Td (3007 uchar data[512];) 100.4758 Tj 0 -104.427 Td (3008 };) 30.5796 Tj 0 -113.9203 Td (3009 #define B_BUSY 0x1 // buffer is locked by some process) 266.4794 Tj 0 -123.4137 Td (3010 #define B_VALID 0x2 // buffer has been read from disk) 257.7424 Tj 0 -132.9071 Td (3011 #define B_DIRTY 0x4 // buffer needs to be written to disk) 275.2164 Tj 0 -142.4004 Td (3012 ) 21.8426 Tj 0 -151.8938 Td (3013 ) 21.8426 Tj 0 -161.3871 Td (3014 ) 21.8426 Tj 0 -170.8805 Td (3015 ) 21.8426 Tj 0 -180.3739 Td (3016 ) 21.8426 Tj 0 -189.8672 Td (3017 ) 21.8426 Tj 0 -199.3606 Td (3018 ) 21.8426 Tj 0 -208.8539 Td (3019 ) 21.8426 Tj 0 -218.3473 Td (3020 ) 21.8426 Tj 0 -227.8407 Td (3021 ) 21.8426 Tj 0 -237.334 Td (3022 ) 21.8426 Tj 0 -246.8274 Td (3023 ) 21.8426 Tj 0 -256.3207 Td (3024 ) 21.8426 Tj 0 -265.8141 Td (3025 ) 21.8426 Tj 0 -275.3075 Td (3026 ) 21.8426 Tj 0 -284.8008 Td (3027 ) 21.8426 Tj 0 -294.2942 Td (3028 ) 21.8426 Tj 0 -303.7875 Td (3029 ) 21.8426 Tj 0 -313.2809 Td (3030 ) 21.8426 Tj 0 -322.7743 Td (3031 ) 21.8426 Tj 0 -332.2676 Td (3032 ) 21.8426 Tj 0 -341.761 Td (3033 ) 21.8426 Tj 0 -351.2543 Td (3034 ) 21.8426 Tj 0 -360.7477 Td (3035 ) 21.8426 Tj 0 -370.2411 Td (3036 ) 21.8426 Tj 0 -379.7344 Td (3037 ) 21.8426 Tj 0 -389.2278 Td (3038 ) 21.8426 Tj 0 -398.7211 Td (3039 ) 21.8426 Tj 0 -408.2145 Td (3040 ) 21.8426 Tj 0 -417.7079 Td (3041 ) 21.8426 Tj 0 -427.2012 Td (3042 ) 21.8426 Tj 0 -436.6946 Td (3043 ) 21.8426 Tj 0 -446.1879 Td (3044 ) 21.8426 Tj 0 -455.6813 Td (3045 ) 21.8426 Tj 0 -465.1747 Td (3046 ) 21.8426 Tj 0 -474.668 Td (3047 ) 21.8426 Tj 0 -484.1614 Td (3048 ) 21.8426 Tj 0 -493.6547 Td (3049 ) 21.8426 Tj 0 -522.1348 Td (Sheet 30) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/fcntl.h Page 1) 166.0035 Tj 0 -28.4801 Td (3050 #define O_RDONLY 0x000) 122.3184 Tj 0 -37.9735 Td (3051 #define O_WRONLY 0x001) 122.3184 Tj 0 -47.4668 Td (3052 #define O_RDWR 0x002) 122.3184 Tj 0 -56.9602 Td (3053 #define O_CREATE 0x200) 122.3184 Tj 0 -66.4535 Td (3054 ) 21.8426 Tj 0 -75.9469 Td (3055 ) 21.8426 Tj 0 -85.4403 Td (3056 ) 21.8426 Tj 0 -94.9336 Td (3057 ) 21.8426 Tj 0 -104.427 Td (3058 ) 21.8426 Tj 0 -113.9203 Td (3059 ) 21.8426 Tj 0 -123.4137 Td (3060 ) 21.8426 Tj 0 -132.9071 Td (3061 ) 21.8426 Tj 0 -142.4004 Td (3062 ) 21.8426 Tj 0 -151.8938 Td (3063 ) 21.8426 Tj 0 -161.3871 Td (3064 ) 21.8426 Tj 0 -170.8805 Td (3065 ) 21.8426 Tj 0 -180.3739 Td (3066 ) 21.8426 Tj 0 -189.8672 Td (3067 ) 21.8426 Tj 0 -199.3606 Td (3068 ) 21.8426 Tj 0 -208.8539 Td (3069 ) 21.8426 Tj 0 -218.3473 Td (3070 ) 21.8426 Tj 0 -227.8407 Td (3071 ) 21.8426 Tj 0 -237.334 Td (3072 ) 21.8426 Tj 0 -246.8274 Td (3073 ) 21.8426 Tj 0 -256.3207 Td (3074 ) 21.8426 Tj 0 -265.8141 Td (3075 ) 21.8426 Tj 0 -275.3075 Td (3076 ) 21.8426 Tj 0 -284.8008 Td (3077 ) 21.8426 Tj 0 -294.2942 Td (3078 ) 21.8426 Tj 0 -303.7875 Td (3079 ) 21.8426 Tj 0 -313.2809 Td (3080 ) 21.8426 Tj 0 -322.7743 Td (3081 ) 21.8426 Tj 0 -332.2676 Td (3082 ) 21.8426 Tj 0 -341.761 Td (3083 ) 21.8426 Tj 0 -351.2543 Td (3084 ) 21.8426 Tj 0 -360.7477 Td (3085 ) 21.8426 Tj 0 -370.2411 Td (3086 ) 21.8426 Tj 0 -379.7344 Td (3087 ) 21.8426 Tj 0 -389.2278 Td (3088 ) 21.8426 Tj 0 -398.7211 Td (3089 ) 21.8426 Tj 0 -408.2145 Td (3090 ) 21.8426 Tj 0 -417.7079 Td (3091 ) 21.8426 Tj 0 -427.2012 Td (3092 ) 21.8426 Tj 0 -436.6946 Td (3093 ) 21.8426 Tj 0 -446.1879 Td (3094 ) 21.8426 Tj 0 -455.6813 Td (3095 ) 21.8426 Tj 0 -465.1747 Td (3096 ) 21.8426 Tj 0 -474.668 Td (3097 ) 21.8426 Tj 0 -484.1614 Td (3098 ) 21.8426 Tj 0 -493.6547 Td (3099 ) 21.8426 Tj 0 -522.1348 Td (Sheet 30) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 38 38 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/stat.h Page 1) 161.635 Tj 0 -28.4801 Td (3100 #define T_DIR 1 // Directory) 157.2665 Tj 0 -37.9735 Td (3101 #define T_FILE 2 // File) 135.4239 Tj 0 -47.4668 Td (3102 #define T_DEV 3 // Special device) 179.1091 Tj 0 -56.9602 Td (3103 ) 21.8426 Tj 0 -66.4535 Td (3104 struct stat {) 78.6333 Tj 0 -75.9469 Td (3105 short type; // Type of file) 152.898 Tj 0 -85.4403 Td (3106 int dev; // Device number) 157.2665 Tj 0 -94.9336 Td (3107 uint ino; // Inode number on device) 196.5831 Tj 0 -104.427 Td (3108 short nlink; // Number of links to file) 200.9517 Tj 0 -113.9203 Td (3109 uint size; // Size of file in bytes) 192.2146 Tj 0 -123.4137 Td (3110 };) 30.5796 Tj 0 -132.9071 Td (3111 ) 21.8426 Tj 0 -142.4004 Td (3112 ) 21.8426 Tj 0 -151.8938 Td (3113 ) 21.8426 Tj 0 -161.3871 Td (3114 ) 21.8426 Tj 0 -170.8805 Td (3115 ) 21.8426 Tj 0 -180.3739 Td (3116 ) 21.8426 Tj 0 -189.8672 Td (3117 ) 21.8426 Tj 0 -199.3606 Td (3118 ) 21.8426 Tj 0 -208.8539 Td (3119 ) 21.8426 Tj 0 -218.3473 Td (3120 ) 21.8426 Tj 0 -227.8407 Td (3121 ) 21.8426 Tj 0 -237.334 Td (3122 ) 21.8426 Tj 0 -246.8274 Td (3123 ) 21.8426 Tj 0 -256.3207 Td (3124 ) 21.8426 Tj 0 -265.8141 Td (3125 ) 21.8426 Tj 0 -275.3075 Td (3126 ) 21.8426 Tj 0 -284.8008 Td (3127 ) 21.8426 Tj 0 -294.2942 Td (3128 ) 21.8426 Tj 0 -303.7875 Td (3129 ) 21.8426 Tj 0 -313.2809 Td (3130 ) 21.8426 Tj 0 -322.7743 Td (3131 ) 21.8426 Tj 0 -332.2676 Td (3132 ) 21.8426 Tj 0 -341.761 Td (3133 ) 21.8426 Tj 0 -351.2543 Td (3134 ) 21.8426 Tj 0 -360.7477 Td (3135 ) 21.8426 Tj 0 -370.2411 Td (3136 ) 21.8426 Tj 0 -379.7344 Td (3137 ) 21.8426 Tj 0 -389.2278 Td (3138 ) 21.8426 Tj 0 -398.7211 Td (3139 ) 21.8426 Tj 0 -408.2145 Td (3140 ) 21.8426 Tj 0 -417.7079 Td (3141 ) 21.8426 Tj 0 -427.2012 Td (3142 ) 21.8426 Tj 0 -436.6946 Td (3143 ) 21.8426 Tj 0 -446.1879 Td (3144 ) 21.8426 Tj 0 -455.6813 Td (3145 ) 21.8426 Tj 0 -465.1747 Td (3146 ) 21.8426 Tj 0 -474.668 Td (3147 ) 21.8426 Tj 0 -484.1614 Td (3148 ) 21.8426 Tj 0 -493.6547 Td (3149 ) 21.8426 Tj 0 -522.1348 Td (Sheet 31) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/fs.h Page 1) 152.898 Tj 0 -28.4801 Td (3150 // On-disk file system format.) 152.898 Tj 0 -37.9735 Td (3151 // Both the kernel and user programs use this header file.) 275.2164 Tj 0 -47.4668 Td (3152 ) 21.8426 Tj 0 -56.9602 Td (3153 // Block 0 is unused.) 113.5814 Tj 0 -66.4535 Td (3154 // Block 1 is super block.) 135.4239 Tj 0 -75.9469 Td (3155 // Inodes start at block 2.) 139.7925 Tj 0 -85.4403 Td (3156 ) 21.8426 Tj 0 -94.9336 Td (3157 #define ROOTINO 1 // root i-number) 174.7406 Tj 0 -104.427 Td (3158 #define BSIZE 512 // block size) 161.635 Tj 0 -113.9203 Td (3159 ) 21.8426 Tj 0 -123.4137 Td (3160 // File system super block) 135.4239 Tj 0 -132.9071 Td (3161 struct superblock {) 104.8443 Tj 0 -142.4004 Td (3162 uint size; // Size of file system image $blocks\ $) 275.2164 Tj 0 -151.8938 Td (3163 uint nblocks; // Number of data blocks) 218.4257 Tj 0 -161.3871 Td (3164 uint ninodes; // Number of inodes.) 200.9517 Tj 0 -170.8805 Td (3165 };) 30.5796 Tj 0 -180.3739 Td (3166 ) 21.8426 Tj 0 -189.8672 Td (3167 #define NDIRECT 12) 100.4758 Tj 0 -199.3606 Td (3168 #define NINDIRECT $BSIZE / sizeof\(uint$\)) 196.5831 Tj 0 -208.8539 Td (3169 #define MAXFILE $NDIRECT + NINDIRECT$) 183.4776 Tj 0 -218.3473 Td (3170 ) 21.8426 Tj 0 -227.8407 Td (3171 // On-disk inode structure) 135.4239 Tj 0 -237.334 Td (3172 struct dinode {) 87.3703 Tj 0 -246.8274 Td (3173 short type; // File type) 179.1091 Tj 0 -256.3207 Td (3174 short major; // Major device number $T_DEV onl\ y$) 279.5849 Tj 0 -265.8141 Td (3175 short minor; // Minor device number $T_DEV onl\ y$) 279.5849 Tj 0 -275.3075 Td (3176 short nlink; // Number of links to inode in fil\ e system) 310.1645 Tj 0 -284.8008 Td (3177 uint size; // Size of file $bytes$) 227.1628 Tj 0 -294.2942 Td (3178 uint addrs[NDIRECT+1]; // Data block addresses) 240.2683 Tj 0 -303.7875 Td (3179 };) 30.5796 Tj 0 -313.2809 Td (3180 ) 21.8426 Tj 0 -322.7743 Td (3181 // Inodes per block.) 109.2129 Tj 0 -332.2676 Td (3182 #define IPB $BSIZE / sizeof\(struct dinode$\)) 253.3738 Tj 0 -341.761 Td (3183 ) 21.8426 Tj 0 -351.2543 Td (3184 // Block containing inode i) 139.7925 Tj 0 -360.7477 Td (3185 #define IBLOCK$i$ $\(i$ / IPB + 2\)) 183.4776 Tj 0 -370.2411 Td (3186 ) 21.8426 Tj 0 -379.7344 Td (3187 // Bitmap bits per block) 126.6869 Tj 0 -389.2278 Td (3188 #define BPB $BSIZE*8$) 157.2665 Tj 0 -398.7211 Td (3189 ) 21.8426 Tj 0 -408.2145 Td (3190 // Block containing bit for block b) 174.7406 Tj 0 -417.7079 Td (3191 #define BBLOCK$b, ninodes$ $b/BPB + \(ninodes$/IPB + 3\ \)) 257.7424 Tj 0 -427.2012 Td (3192 ) 21.8426 Tj 0 -436.6946 Td (3193 ) 21.8426 Tj 0 -446.1879 Td (3194 ) 21.8426 Tj 0 -455.6813 Td (3195 ) 21.8426 Tj 0 -465.1747 Td (3196 ) 21.8426 Tj 0 -474.668 Td (3197 ) 21.8426 Tj 0 -484.1614 Td (3198 ) 21.8426 Tj 0 -493.6547 Td (3199 ) 21.8426 Tj 0 -522.1348 Td (Sheet 31) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 39 39 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/fs.h Page 2) 152.898 Tj 0 -28.4801 Td (3200 // Directory is a file containing a sequence of dirent str\ uctures.) 310.1645 Tj 0 -37.9735 Td (3201 #define DIRSIZ 14) 96.1073 Tj 0 -47.4668 Td (3202 ) 21.8426 Tj 0 -56.9602 Td (3203 struct dirent {) 87.3703 Tj 0 -66.4535 Td (3204 ushort inum;) 83.0018 Tj 0 -75.9469 Td (3205 char name[DIRSIZ];) 109.2129 Tj 0 -85.4403 Td (3206 };) 30.5796 Tj 0 -94.9336 Td (3207 ) 21.8426 Tj 0 -104.427 Td (3208 ) 21.8426 Tj 0 -113.9203 Td (3209 ) 21.8426 Tj 0 -123.4137 Td (3210 ) 21.8426 Tj 0 -132.9071 Td (3211 ) 21.8426 Tj 0 -142.4004 Td (3212 ) 21.8426 Tj 0 -151.8938 Td (3213 ) 21.8426 Tj 0 -161.3871 Td (3214 ) 21.8426 Tj 0 -170.8805 Td (3215 ) 21.8426 Tj 0 -180.3739 Td (3216 ) 21.8426 Tj 0 -189.8672 Td (3217 ) 21.8426 Tj 0 -199.3606 Td (3218 ) 21.8426 Tj 0 -208.8539 Td (3219 ) 21.8426 Tj 0 -218.3473 Td (3220 ) 21.8426 Tj 0 -227.8407 Td (3221 ) 21.8426 Tj 0 -237.334 Td (3222 ) 21.8426 Tj 0 -246.8274 Td (3223 ) 21.8426 Tj 0 -256.3207 Td (3224 ) 21.8426 Tj 0 -265.8141 Td (3225 ) 21.8426 Tj 0 -275.3075 Td (3226 ) 21.8426 Tj 0 -284.8008 Td (3227 ) 21.8426 Tj 0 -294.2942 Td (3228 ) 21.8426 Tj 0 -303.7875 Td (3229 ) 21.8426 Tj 0 -313.2809 Td (3230 ) 21.8426 Tj 0 -322.7743 Td (3231 ) 21.8426 Tj 0 -332.2676 Td (3232 ) 21.8426 Tj 0 -341.761 Td (3233 ) 21.8426 Tj 0 -351.2543 Td (3234 ) 21.8426 Tj 0 -360.7477 Td (3235 ) 21.8426 Tj 0 -370.2411 Td (3236 ) 21.8426 Tj 0 -379.7344 Td (3237 ) 21.8426 Tj 0 -389.2278 Td (3238 ) 21.8426 Tj 0 -398.7211 Td (3239 ) 21.8426 Tj 0 -408.2145 Td (3240 ) 21.8426 Tj 0 -417.7079 Td (3241 ) 21.8426 Tj 0 -427.2012 Td (3242 ) 21.8426 Tj 0 -436.6946 Td (3243 ) 21.8426 Tj 0 -446.1879 Td (3244 ) 21.8426 Tj 0 -455.6813 Td (3245 ) 21.8426 Tj 0 -465.1747 Td (3246 ) 21.8426 Tj 0 -474.668 Td (3247 ) 21.8426 Tj 0 -484.1614 Td (3248 ) 21.8426 Tj 0 -493.6547 Td (3249 ) 21.8426 Tj 0 -522.1348 Td (Sheet 32) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/file.h Page 1) 161.635 Tj 0 -28.4801 Td (3250 struct file {) 78.6333 Tj 0 -37.9735 Td (3251 enum { FD_NONE, FD_PIPE, FD_INODE } type;) 209.6887 Tj 0 -47.4668 Td (3252 int ref; // reference count) 148.5295 Tj 0 -56.9602 Td (3253 char readable;) 91.7388 Tj 0 -66.4535 Td (3254 char writable;) 91.7388 Tj 0 -75.9469 Td (3255 struct pipe *pipe;) 109.2129 Tj 0 -85.4403 Td (3256 struct inode *ip;) 104.8443 Tj 0 -94.9336 Td (3257 uint off;) 69.8962 Tj 0 -104.427 Td (3258 };) 30.5796 Tj 0 -113.9203 Td (3259 ) 21.8426 Tj 0 -123.4137 Td (3260 ) 21.8426 Tj 0 -132.9071 Td (3261 // in-core file system types) 144.161 Tj 0 -142.4004 Td (3262 ) 21.8426 Tj 0 -151.8938 Td (3263 struct inode {) 83.0018 Tj 0 -161.3871 Td (3264 uint dev; // Device number) 187.8461 Tj 0 -170.8805 Td (3265 uint inum; // Inode number) 183.4776 Tj 0 -180.3739 Td (3266 int ref; // Reference count) 196.5831 Tj 0 -189.8672 Td (3267 int flags; // I_BUSY, I_VALID) 196.5831 Tj 0 -199.3606 Td (3268 ) 21.8426 Tj 0 -208.8539 Td (3269 short type; // copy of disk inode) 209.6887 Tj 0 -218.3473 Td (3270 short major;) 83.0018 Tj 0 -227.8407 Td (3271 short minor;) 83.0018 Tj 0 -237.334 Td (3272 short nlink;) 83.0018 Tj 0 -246.8274 Td (3273 uint size;) 74.2647 Tj 0 -256.3207 Td (3274 uint addrs[NDIRECT+1];) 126.6869 Tj 0 -265.8141 Td (3275 };) 30.5796 Tj 0 -275.3075 Td (3276 ) 21.8426 Tj 0 -284.8008 Td (3277 #define I_BUSY 0x1) 100.4758 Tj 0 -294.2942 Td (3278 #define I_VALID 0x2) 104.8443 Tj 0 -303.7875 Td (3279 ) 21.8426 Tj 0 -313.2809 Td (3280 ) 21.8426 Tj 0 -322.7743 Td (3281 // device implementations) 131.0554 Tj 0 -332.2676 Td (3282 ) 21.8426 Tj 0 -341.761 Td (3283 struct devsw {) 83.0018 Tj 0 -351.2543 Td (3284 int $*read$$struct inode*, char*, int$;) 200.9517 Tj 0 -360.7477 Td (3285 int $*write$$struct inode*, char*, int$;) 205.3202 Tj 0 -370.2411 Td (3286 };) 30.5796 Tj 0 -379.7344 Td (3287 ) 21.8426 Tj 0 -389.2278 Td (3288 extern struct devsw devsw[];) 144.161 Tj 0 -398.7211 Td (3289 ) 21.8426 Tj 0 -408.2145 Td (3290 #define CONSOLE 1) 96.1073 Tj 0 -417.7079 Td (3291 ) 21.8426 Tj 0 -427.2012 Td (3292 ) 21.8426 Tj 0 -436.6946 Td (3293 ) 21.8426 Tj 0 -446.1879 Td (3294 ) 21.8426 Tj 0 -455.6813 Td (3295 ) 21.8426 Tj 0 -465.1747 Td (3296 ) 21.8426 Tj 0 -474.668 Td (3297 ) 21.8426 Tj 0 -484.1614 Td (3298 ) 21.8426 Tj 0 -493.6547 Td (3299 ) 21.8426 Tj 0 -522.1348 Td (Sheet 32) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 40 40 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/ide.c Page 1) 157.2665 Tj 0 -28.4801 Td (3300 // Simple PIO-based $non-DMA$ IDE driver code.) 222.7942 Tj 0 -37.9735 Td (3301 ) 21.8426 Tj 0 -47.4668 Td (3302 #include "types.h") 100.4758 Tj 0 -56.9602 Td (3303 #include "defs.h") 96.1073 Tj 0 -66.4535 Td (3304 #include "param.h") 100.4758 Tj 0 -75.9469 Td (3305 #include "mmu.h") 91.7388 Tj 0 -85.4403 Td (3306 #include "proc.h") 96.1073 Tj 0 -94.9336 Td (3307 #include "x86.h") 91.7388 Tj 0 -104.427 Td (3308 #include "traps.h") 100.4758 Tj 0 -113.9203 Td (3309 #include "spinlock.h") 113.5814 Tj 0 -123.4137 Td (3310 #include "buf.h") 91.7388 Tj 0 -132.9071 Td (3311 ) 21.8426 Tj 0 -142.4004 Td (3312 #define IDE_BSY 0x80) 135.4239 Tj 0 -151.8938 Td (3313 #define IDE_DRDY 0x40) 135.4239 Tj 0 -161.3871 Td (3314 #define IDE_DF 0x20) 135.4239 Tj 0 -170.8805 Td (3315 #define IDE_ERR 0x01) 135.4239 Tj 0 -180.3739 Td (3316 ) 21.8426 Tj 0 -189.8672 Td (3317 #define IDE_CMD_READ 0x20) 135.4239 Tj 0 -199.3606 Td (3318 #define IDE_CMD_WRITE 0x30) 135.4239 Tj 0 -208.8539 Td (3319 ) 21.8426 Tj 0 -218.3473 Td (3320 // idequeue points to the buf now being read/written to th\ e disk.) 305.796 Tj 0 -227.8407 Td (3321 // idequeue->qnext points to the next buf to be processed.) 275.2164 Tj 0 -237.334 Td (3322 // You must hold idelock while manipulating queue.) 240.2683 Tj 0 -246.8274 Td (3323 ) 21.8426 Tj 0 -256.3207 Td (3324 static struct spinlock idelock;) 157.2665 Tj 0 -265.8141 Td (3325 static struct buf *idequeue;) 144.161 Tj 0 -275.3075 Td (3326 ) 21.8426 Tj 0 -284.8008 Td (3327 static int havedisk1;) 113.5814 Tj 0 -294.2942 Td (3328 static void idestart$struct buf*$;) 170.3721 Tj 0 -303.7875 Td (3329 ) 21.8426 Tj 0 -313.2809 Td (3330 // Wait for IDE disk to become ready.) 183.4776 Tj 0 -322.7743 Td (3331 static int) 65.5277 Tj 0 -332.2676 Td (3332 idewait$int checkerr$) 113.5814 Tj 0 -341.761 Td (3333 {) 26.2111 Tj 0 -351.2543 Td (3334 int r;) 56.7907 Tj 0 -360.7477 Td (3335 ) 21.8426 Tj 0 -370.2411 Td (3336 while$\(\(r = inb\(0x1f7$\) & $IDE_BSY|IDE_DRDY$\) !\ = IDE_DRDY\)) 283.9534 Tj 0 -379.7344 Td (3337 ;) 43.6851 Tj 0 -389.2278 Td (3338 if$checkerr && \(r & \(IDE_DF|IDE_ERR$\) != 0\)) 218.4257 Tj 0 -398.7211 Td (3339 return -1;) 83.0018 Tj 0 -408.2145 Td (3340 return 0;) 69.8962 Tj 0 -417.7079 Td (3341 }) 26.2111 Tj 0 -427.2012 Td (3342 ) 21.8426 Tj 0 -436.6946 Td (3343 ) 21.8426 Tj 0 -446.1879 Td (3344 ) 21.8426 Tj 0 -455.6813 Td (3345 ) 21.8426 Tj 0 -465.1747 Td (3346 ) 21.8426 Tj 0 -474.668 Td (3347 ) 21.8426 Tj 0 -484.1614 Td (3348 ) 21.8426 Tj 0 -493.6547 Td (3349 ) 21.8426 Tj 0 -522.1348 Td (Sheet 33) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/ide.c Page 2) 157.2665 Tj 0 -28.4801 Td (3350 void) 39.3166 Tj 0 -37.9735 Td (3351 ideinit$void$) 78.6333 Tj 0 -47.4668 Td (3352 {) 26.2111 Tj 0 -56.9602 Td (3353 int i;) 56.7907 Tj 0 -66.4535 Td (3354 ) 21.8426 Tj 0 -75.9469 Td (3355 initlock$&idelock, "ide"$;) 144.161 Tj 0 -85.4403 Td (3356 picenable$IRQ_IDE$;) 113.5814 Tj 0 -94.9336 Td (3357 ioapicenable$IRQ_IDE, ncpu - 1$;) 170.3721 Tj 0 -104.427 Td (3358 idewait$0$;) 78.6333 Tj 0 -113.9203 Td (3359 ) 21.8426 Tj 0 -123.4137 Td (3360 // Check if disk 1 is present) 157.2665 Tj 0 -132.9071 Td (3361 outb$0x1f6, 0xe0 | \(1<<4$\);) 148.5295 Tj 0 -142.4004 Td (3362 for$i=0; i<1000; i++${) 126.6869 Tj 0 -151.8938 Td (3363 if$inb\(0x1f7$ != 0\){) 126.6869 Tj 0 -161.3871 Td (3364 havedisk1 = 1;) 109.2129 Tj 0 -170.8805 Td (3365 break;) 74.2647 Tj 0 -180.3739 Td (3366 }) 43.6851 Tj 0 -189.8672 Td (3367 }) 34.9481 Tj 0 -199.3606 Td (3368 ) 21.8426 Tj 0 -208.8539 Td (3369 // Switch back to disk 0.) 139.7925 Tj 0 -218.3473 Td (3370 outb$0x1f6, 0xe0 | \(0<<4$\);) 148.5295 Tj 0 -227.8407 Td (3371 }) 26.2111 Tj 0 -237.334 Td (3372 ) 21.8426 Tj 0 -246.8274 Td (3373 // Start the request for b. Caller must hold idelock.) 257.7424 Tj 0 -256.3207 Td (3374 static void) 69.8962 Tj 0 -265.8141 Td (3375 idestart$struct buf *b$) 122.3184 Tj 0 -275.3075 Td (3376 {) 26.2111 Tj 0 -284.8008 Td (3377 if$b == 0$) 74.2647 Tj 0 -294.2942 Td (3378 panic$"idestart"$;) 117.9499 Tj 0 -303.7875 Td (3379 ) 21.8426 Tj 0 -313.2809 Td (3380 idewait$0$;) 78.6333 Tj 0 -322.7743 Td (3381 outb$0x3f6, 0$; // generate interrupt) 196.5831 Tj 0 -332.2676 Td (3382 outb$0x1f2, 1$; // number of sectors) 192.2146 Tj 0 -341.761 Td (3383 outb$0x1f3, b->sector & 0xff$;) 161.635 Tj 0 -351.2543 Td (3384 outb$0x1f4, \(b->sector >> 8$ & 0xff\);) 192.2146 Tj 0 -360.7477 Td (3385 outb$0x1f5, \(b->sector >> 16$ & 0xff\);) 196.5831 Tj 0 -370.2411 Td (3386 outb$0x1f6, 0xe0 | \(\(b->dev&1$<<4\) | $\(b->sector>\ >24$&0x0f\)\);) 297.059 Tj 0 -379.7344 Td (3387 if$b->flags & B_DIRTY${) 131.0554 Tj 0 -389.2278 Td (3388 outb$0x1f7, IDE_CMD_WRITE$;) 157.2665 Tj 0 -398.7211 Td (3389 outsl$0x1f0, b->data, 512/4$;) 166.0035 Tj 0 -408.2145 Td (3390 } else {) 65.5277 Tj 0 -417.7079 Td (3391 outb$0x1f7, IDE_CMD_READ$;) 152.898 Tj 0 -427.2012 Td (3392 }) 34.9481 Tj 0 -436.6946 Td (3393 }) 26.2111 Tj 0 -446.1879 Td (3394 ) 21.8426 Tj 0 -455.6813 Td (3395 ) 21.8426 Tj 0 -465.1747 Td (3396 ) 21.8426 Tj 0 -474.668 Td (3397 ) 21.8426 Tj 0 -484.1614 Td (3398 ) 21.8426 Tj 0 -493.6547 Td (3399 ) 21.8426 Tj 0 -522.1348 Td (Sheet 33) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 41 41 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/ide.c Page 3) 157.2665 Tj 0 -28.4801 Td (3400 // Interrupt handler.) 113.5814 Tj 0 -37.9735 Td (3401 void) 39.3166 Tj 0 -47.4668 Td (3402 ideintr$void$) 78.6333 Tj 0 -56.9602 Td (3403 {) 26.2111 Tj 0 -66.4535 Td (3404 struct buf *b;) 91.7388 Tj 0 -75.9469 Td (3405 ) 21.8426 Tj 0 -85.4403 Td (3406 // Take first buffer off queue.) 166.0035 Tj 0 -94.9336 Td (3407 acquire$&idelock$;) 109.2129 Tj 0 -104.427 Td (3408 if$\(b = idequeue$ == 0\){) 135.4239 Tj 0 -113.9203 Td (3409 release$&idelock$;) 117.9499 Tj 0 -123.4137 Td (3410 cprintf$"Spurious IDE interrupt.\\n"$;) 200.9517 Tj 0 -132.9071 Td (3411 return;) 69.8962 Tj 0 -142.4004 Td (3412 }) 34.9481 Tj 0 -151.8938 Td (3413 idequeue = b->qnext;) 117.9499 Tj 0 -161.3871 Td (3414 ) 21.8426 Tj 0 -170.8805 Td (3415 // Read data if needed.) 131.0554 Tj 0 -180.3739 Td (3416 if$!\(b->flags & B_DIRTY$ && idewait$1$ >= 0\)) 222.7942 Tj 0 -189.8672 Td (3417 insl$0x1f0, b->data, 512/4$;) 161.635 Tj 0 -199.3606 Td (3418 ) 21.8426 Tj 0 -208.8539 Td (3419 // Wake process waiting for this buf.) 192.2146 Tj 0 -218.3473 Td (3420 b->flags |= B_VALID;) 117.9499 Tj 0 -227.8407 Td (3421 b->flags &= ~B_DIRTY;) 122.3184 Tj 0 -237.334 Td (3422 wakeup$b$;) 74.2647 Tj 0 -246.8274 Td (3423 ) 21.8426 Tj 0 -256.3207 Td (3424 // Start disk on next buf in queue.) 183.4776 Tj 0 -265.8141 Td (3425 if$idequeue != 0$) 104.8443 Tj 0 -275.3075 Td (3426 idestart$idequeue$;) 122.3184 Tj 0 -284.8008 Td (3427 ) 21.8426 Tj 0 -294.2942 Td (3428 release$&idelock$;) 109.2129 Tj 0 -303.7875 Td (3429 }) 26.2111 Tj 0 -313.2809 Td (3430 ) 21.8426 Tj 0 -322.7743 Td (3431 ) 21.8426 Tj 0 -332.2676 Td (3432 ) 21.8426 Tj 0 -341.761 Td (3433 ) 21.8426 Tj 0 -351.2543 Td (3434 ) 21.8426 Tj 0 -360.7477 Td (3435 ) 21.8426 Tj 0 -370.2411 Td (3436 ) 21.8426 Tj 0 -379.7344 Td (3437 ) 21.8426 Tj 0 -389.2278 Td (3438 ) 21.8426 Tj 0 -398.7211 Td (3439 ) 21.8426 Tj 0 -408.2145 Td (3440 ) 21.8426 Tj 0 -417.7079 Td (3441 ) 21.8426 Tj 0 -427.2012 Td (3442 ) 21.8426 Tj 0 -436.6946 Td (3443 ) 21.8426 Tj 0 -446.1879 Td (3444 ) 21.8426 Tj 0 -455.6813 Td (3445 ) 21.8426 Tj 0 -465.1747 Td (3446 ) 21.8426 Tj 0 -474.668 Td (3447 ) 21.8426 Tj 0 -484.1614 Td (3448 ) 21.8426 Tj 0 -493.6547 Td (3449 ) 21.8426 Tj 0 -522.1348 Td (Sheet 34) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/ide.c Page 4) 157.2665 Tj 0 -28.4801 Td (3450 // Sync buf with disk.) 117.9499 Tj 0 -37.9735 Td (3451 // If B_DIRTY is set, write buf to disk, clear B_DIRTY, se\ t B_VALID.) 318.9016 Tj 0 -47.4668 Td (3452 // Else if B_VALID is not set, read buf from disk, set B_V\ ALID.) 297.059 Tj 0 -56.9602 Td (3453 void) 39.3166 Tj 0 -66.4535 Td (3454 iderw$struct buf *b$) 109.2129 Tj 0 -75.9469 Td (3455 {) 26.2111 Tj 0 -85.4403 Td (3456 struct buf **pp;) 100.4758 Tj 0 -94.9336 Td (3457 ) 21.8426 Tj 0 -104.427 Td (3458 if$!\(b->flags & B_BUSY$\)) 135.4239 Tj 0 -113.9203 Td (3459 panic$"iderw: buf not busy"$;) 166.0035 Tj 0 -123.4137 Td (3460 if$\(b->flags & \(B_VALID|B_DIRTY$\) == B_VALID\)) 227.1628 Tj 0 -132.9071 Td (3461 panic$"iderw: nothing to do"$;) 170.3721 Tj 0 -142.4004 Td (3462 if$b->dev != 0 && !havedisk1$) 157.2665 Tj 0 -151.8938 Td (3463 panic$"idrw: ide disk 1 not present"$;) 205.3202 Tj 0 -161.3871 Td (3464 ) 21.8426 Tj 0 -170.8805 Td (3465 acquire$&idelock$;) 109.2129 Tj 0 -180.3739 Td (3466 ) 21.8426 Tj 0 -189.8672 Td (3467 // Append b to idequeue.) 135.4239 Tj 0 -199.3606 Td (3468 b->qnext = 0;) 87.3703 Tj 0 -208.8539 Td (3469 for$pp=&idequeue; *pp; pp=&\(*pp$->qnext\)) 205.3202 Tj 0 -218.3473 Td (3470 ;) 43.6851 Tj 0 -227.8407 Td (3471 *pp = b;) 65.5277 Tj 0 -237.334 Td (3472 ) 21.8426 Tj 0 -246.8274 Td (3473 // Start disk if necessary.) 148.5295 Tj 0 -256.3207 Td (3474 if$idequeue == b$) 104.8443 Tj 0 -265.8141 Td (3475 idestart$b$;) 91.7388 Tj 0 -275.3075 Td (3476 ) 21.8426 Tj 0 -284.8008 Td (3477 // Wait for request to finish.) 161.635 Tj 0 -294.2942 Td (3478 // Assuming will not sleep too long: ignore proc->killed\ .) 279.5849 Tj 0 -303.7875 Td (3479 while$\(b->flags & \(B_VALID|B_DIRTY$\) != B_VALID\)) 240.2683 Tj 0 -313.2809 Td (3480 sleep$b, &idelock$;) 122.3184 Tj 0 -322.7743 Td (3481 ) 21.8426 Tj 0 -332.2676 Td (3482 release$&idelock$;) 109.2129 Tj 0 -341.761 Td (3483 }) 26.2111 Tj 0 -351.2543 Td (3484 ) 21.8426 Tj 0 -360.7477 Td (3485 ) 21.8426 Tj 0 -370.2411 Td (3486 ) 21.8426 Tj 0 -379.7344 Td (3487 ) 21.8426 Tj 0 -389.2278 Td (3488 ) 21.8426 Tj 0 -398.7211 Td (3489 ) 21.8426 Tj 0 -408.2145 Td (3490 ) 21.8426 Tj 0 -417.7079 Td (3491 ) 21.8426 Tj 0 -427.2012 Td (3492 ) 21.8426 Tj 0 -436.6946 Td (3493 ) 21.8426 Tj 0 -446.1879 Td (3494 ) 21.8426 Tj 0 -455.6813 Td (3495 ) 21.8426 Tj 0 -465.1747 Td (3496 ) 21.8426 Tj 0 -474.668 Td (3497 ) 21.8426 Tj 0 -484.1614 Td (3498 ) 21.8426 Tj 0 -493.6547 Td (3499 ) 21.8426 Tj 0 -522.1348 Td (Sheet 34) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 42 42 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/bio.c Page 1) 157.2665 Tj 0 -28.4801 Td (3500 // Buffer cache.) 91.7388 Tj 0 -37.9735 Td (3501 //) 30.5796 Tj 0 -47.4668 Td (3502 // The buffer cache is a linked list of buf structures hol\ ding) 292.6905 Tj 0 -56.9602 Td (3503 // cached copies of disk block contents. Caching disk blo\ cks) 288.322 Tj 0 -66.4535 Td (3504 // in memory reduces the number of disk reads and also pro\ vides) 297.059 Tj 0 -75.9469 Td (3505 // a synchronization point for disk blocks used by multipl\ e processes.) 327.6386 Tj 0 -85.4403 Td (3506 //) 30.5796 Tj 0 -94.9336 Td (3507 // Interface:) 78.6333 Tj 0 -104.427 Td (3508 // * To get a buffer for a particular disk block, call bre\ ad.) 288.322 Tj 0 -113.9203 Td (3509 // * After changing buffer data, call bwrite to flush it t\ o disk.) 305.796 Tj 0 -123.4137 Td (3510 // * When done with the buffer, call brelse.) 214.0572 Tj 0 -132.9071 Td (3511 // * Do not use the buffer after calling brelse.) 231.5313 Tj 0 -142.4004 Td (3512 // * Only one process at a time can use a buffer,) 235.8998 Tj 0 -151.8938 Td (3513 // so do not keep them longer than necessary.) 235.8998 Tj 0 -161.3871 Td (3514 //) 30.5796 Tj 0 -170.8805 Td (3515 // The implementation uses three state flags internally:) 266.4794 Tj 0 -180.3739 Td (3516 // * B_BUSY: the block has been returned from bread) 244.6368 Tj 0 -189.8672 Td (3517 // and has not been passed back to brelse.) 222.7942 Tj 0 -199.3606 Td (3518 // * B_VALID: the buffer data has been initialized) 240.2683 Tj 0 -208.8539 Td (3519 // with the associated disk block contents.) 227.1628 Tj 0 -218.3473 Td (3520 // * B_DIRTY: the buffer data has been modified) 227.1628 Tj 0 -227.8407 Td (3521 // and needs to be written to disk.) 192.2146 Tj 0 -237.334 Td (3522 ) 21.8426 Tj 0 -246.8274 Td (3523 #include "types.h") 100.4758 Tj 0 -256.3207 Td (3524 #include "defs.h") 96.1073 Tj 0 -265.8141 Td (3525 #include "param.h") 100.4758 Tj 0 -275.3075 Td (3526 #include "spinlock.h") 113.5814 Tj 0 -284.8008 Td (3527 #include "buf.h") 91.7388 Tj 0 -294.2942 Td (3528 ) 21.8426 Tj 0 -303.7875 Td (3529 struct {) 56.7907 Tj 0 -313.2809 Td (3530 struct spinlock lock;) 122.3184 Tj 0 -322.7743 Td (3531 struct buf buf[NBUF];) 122.3184 Tj 0 -332.2676 Td (3532 ) 21.8426 Tj 0 -341.761 Td (3533 // Linked list of all buffers, through prev/next.) 244.6368 Tj 0 -351.2543 Td (3534 // head.next is most recently used.) 183.4776 Tj 0 -360.7477 Td (3535 struct buf head;) 100.4758 Tj 0 -370.2411 Td (3536 } bcache;) 61.1592 Tj 0 -379.7344 Td (3537 ) 21.8426 Tj 0 -389.2278 Td (3538 void) 39.3166 Tj 0 -398.7211 Td (3539 binit$void$) 69.8962 Tj 0 -408.2145 Td (3540 {) 26.2111 Tj 0 -417.7079 Td (3541 struct buf *b;) 91.7388 Tj 0 -427.2012 Td (3542 ) 21.8426 Tj 0 -436.6946 Td (3543 initlock$&bcache.lock, "bcache"$;) 174.7406 Tj 0 -446.1879 Td (3544 ) 21.8426 Tj 0 -455.6813 Td (3545 ) 21.8426 Tj 0 -465.1747 Td (3546 ) 21.8426 Tj 0 -474.668 Td (3547 ) 21.8426 Tj 0 -484.1614 Td (3548 ) 21.8426 Tj 0 -493.6547 Td (3549 ) 21.8426 Tj 0 -522.1348 Td (Sheet 35) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/bio.c Page 2) 157.2665 Tj 0 -28.4801 Td (3550 // Create linked list of buffers) 170.3721 Tj 0 -37.9735 Td (3551 bcache.head.prev = &bcache.head;) 170.3721 Tj 0 -47.4668 Td (3552 bcache.head.next = &bcache.head;) 170.3721 Tj 0 -56.9602 Td (3553 for$b = bcache.buf; b < bcache.buf+NBUF; b++${) 231.5313 Tj 0 -66.4535 Td (3554 b->next = bcache.head.next;) 157.2665 Tj 0 -75.9469 Td (3555 b->prev = &bcache.head;) 139.7925 Tj 0 -85.4403 Td (3556 b->dev = -1;) 91.7388 Tj 0 -94.9336 Td (3557 bcache.head.next->prev = b;) 157.2665 Tj 0 -104.427 Td (3558 bcache.head.next = b;) 131.0554 Tj 0 -113.9203 Td (3559 }) 34.9481 Tj 0 -123.4137 Td (3560 }) 26.2111 Tj 0 -132.9071 Td (3561 ) 21.8426 Tj 0 -142.4004 Td (3562 // Look through buffer cache for sector on device dev.) 257.7424 Tj 0 -151.8938 Td (3563 // If not found, allocate fresh block.) 187.8461 Tj 0 -161.3871 Td (3564 // In either case, return locked buffer.) 196.5831 Tj 0 -170.8805 Td (3565 static struct buf*) 100.4758 Tj 0 -180.3739 Td (3566 bget$uint dev, uint sector$) 139.7925 Tj 0 -189.8672 Td (3567 {) 26.2111 Tj 0 -199.3606 Td (3568 struct buf *b;) 91.7388 Tj 0 -208.8539 Td (3569 ) 21.8426 Tj 0 -218.3473 Td (3570 acquire$&bcache.lock$;) 126.6869 Tj 0 -227.8407 Td (3571 ) 21.8426 Tj 0 -237.334 Td (3572 loop:) 48.0537 Tj 0 -246.8274 Td (3573 // Try for cached block.) 135.4239 Tj 0 -256.3207 Td (3574 for$b = bcache.head.next; b != &bcache.head; b = b->nex\ t${) 283.9534 Tj 0 -265.8141 Td (3575 if$b->dev == dev && b->sector == sector${) 218.4257 Tj 0 -275.3075 Td (3576 if$!\(b->flags & B_BUSY$\){) 157.2665 Tj 0 -284.8008 Td (3577 b->flags |= B_BUSY;) 139.7925 Tj 0 -294.2942 Td (3578 release$&bcache.lock$;) 152.898 Tj 0 -303.7875 Td (3579 return b;) 96.1073 Tj 0 -313.2809 Td (3580 }) 52.4222 Tj 0 -322.7743 Td (3581 sleep$b, &bcache.lock$;) 148.5295 Tj 0 -332.2676 Td (3582 goto loop;) 91.7388 Tj 0 -341.761 Td (3583 }) 43.6851 Tj 0 -351.2543 Td (3584 }) 34.9481 Tj 0 -360.7477 Td (3585 ) 21.8426 Tj 0 -370.2411 Td (3586 // Allocate fresh block.) 135.4239 Tj 0 -379.7344 Td (3587 for$b = bcache.head.prev; b != &bcache.head; b = b->pre\ v${) 283.9534 Tj 0 -389.2278 Td (3588 if$\(b->flags & B_BUSY$ == 0\){) 166.0035 Tj 0 -398.7211 Td (3589 b->dev = dev;) 104.8443 Tj 0 -408.2145 Td (3590 b->sector = sector;) 131.0554 Tj 0 -417.7079 Td (3591 b->flags = B_BUSY;) 126.6869 Tj 0 -427.2012 Td (3592 release$&bcache.lock$;) 144.161 Tj 0 -436.6946 Td (3593 return b;) 87.3703 Tj 0 -446.1879 Td (3594 }) 43.6851 Tj 0 -455.6813 Td (3595 }) 34.9481 Tj 0 -465.1747 Td (3596 panic$"bget: no buffers"$;) 144.161 Tj 0 -474.668 Td (3597 }) 26.2111 Tj 0 -484.1614 Td (3598 ) 21.8426 Tj 0 -493.6547 Td (3599 ) 21.8426 Tj 0 -522.1348 Td (Sheet 35) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 43 43 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/bio.c Page 3) 157.2665 Tj 0 -28.4801 Td (3600 // Return a B_BUSY buf with the contents of the indicated \ disk sector.) 327.6386 Tj 0 -37.9735 Td (3601 struct buf*) 69.8962 Tj 0 -47.4668 Td (3602 bread$uint dev, uint sector$) 144.161 Tj 0 -56.9602 Td (3603 {) 26.2111 Tj 0 -66.4535 Td (3604 struct buf *b;) 91.7388 Tj 0 -75.9469 Td (3605 ) 21.8426 Tj 0 -85.4403 Td (3606 b = bget$dev, sector$;) 126.6869 Tj 0 -94.9336 Td (3607 if$!\(b->flags & B_VALID$\)) 139.7925 Tj 0 -104.427 Td (3608 iderw$b$;) 78.6333 Tj 0 -113.9203 Td (3609 return b;) 69.8962 Tj 0 -123.4137 Td (3610 }) 26.2111 Tj 0 -132.9071 Td (3611 ) 21.8426 Tj 0 -142.4004 Td (3612 // Write b's contents to disk. Must be locked.) 227.1628 Tj 0 -151.8938 Td (3613 void) 39.3166 Tj 0 -161.3871 Td (3614 bwrite$struct buf *b$) 113.5814 Tj 0 -170.8805 Td (3615 {) 26.2111 Tj 0 -180.3739 Td (3616 if$\(b->flags & B_BUSY$ == 0\)) 152.898 Tj 0 -189.8672 Td (3617 panic$"bwrite"$;) 109.2129 Tj 0 -199.3606 Td (3618 b->flags |= B_DIRTY;) 117.9499 Tj 0 -208.8539 Td (3619 iderw$b$;) 69.8962 Tj 0 -218.3473 Td (3620 }) 26.2111 Tj 0 -227.8407 Td (3621 ) 21.8426 Tj 0 -237.334 Td (3622 // Release the buffer b.) 126.6869 Tj 0 -246.8274 Td (3623 void) 39.3166 Tj 0 -256.3207 Td (3624 brelse$struct buf *b$) 113.5814 Tj 0 -265.8141 Td (3625 {) 26.2111 Tj 0 -275.3075 Td (3626 if$\(b->flags & B_BUSY$ == 0\)) 152.898 Tj 0 -284.8008 Td (3627 panic$"brelse"$;) 109.2129 Tj 0 -294.2942 Td (3628 ) 21.8426 Tj 0 -303.7875 Td (3629 acquire$&bcache.lock$;) 126.6869 Tj 0 -313.2809 Td (3630 ) 21.8426 Tj 0 -322.7743 Td (3631 b->next->prev = b->prev;) 135.4239 Tj 0 -332.2676 Td (3632 b->prev->next = b->next;) 135.4239 Tj 0 -341.761 Td (3633 b->next = bcache.head.next;) 148.5295 Tj 0 -351.2543 Td (3634 b->prev = &bcache.head;) 131.0554 Tj 0 -360.7477 Td (3635 bcache.head.next->prev = b;) 148.5295 Tj 0 -370.2411 Td (3636 bcache.head.next = b;) 122.3184 Tj 0 -379.7344 Td (3637 ) 21.8426 Tj 0 -389.2278 Td (3638 b->flags &= ~B_BUSY;) 117.9499 Tj 0 -398.7211 Td (3639 wakeup$b$;) 74.2647 Tj 0 -408.2145 Td (3640 ) 21.8426 Tj 0 -417.7079 Td (3641 release$&bcache.lock$;) 126.6869 Tj 0 -427.2012 Td (3642 }) 26.2111 Tj 0 -436.6946 Td (3643 ) 21.8426 Tj 0 -446.1879 Td (3644 ) 21.8426 Tj 0 -455.6813 Td (3645 ) 21.8426 Tj 0 -465.1747 Td (3646 ) 21.8426 Tj 0 -474.668 Td (3647 ) 21.8426 Tj 0 -484.1614 Td (3648 ) 21.8426 Tj 0 -493.6547 Td (3649 ) 21.8426 Tj 0 -522.1348 Td (Sheet 36) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/fs.c Page 1) 152.898 Tj 0 -28.4801 Td (3650 // File system implementation. Four layers:) 214.0572 Tj 0 -37.9735 Td (3651 // + Blocks: allocator for raw disk blocks.) 218.4257 Tj 0 -47.4668 Td (3652 // + Files: inode allocator, reading, writing, metadata.) 275.2164 Tj 0 -56.9602 Td (3653 // + Directories: inode with special contents $list of \ other inodes!$) 332.0071 Tj 0 -66.4535 Td (3654 // + Names: paths like /usr/rtm/xv6/fs.c for convenient \ naming.) 305.796 Tj 0 -75.9469 Td (3655 //) 30.5796 Tj 0 -85.4403 Td (3656 // Disk layout is: superblock, inodes, block in-use bitmap\ , data blocks.) 336.3756 Tj 0 -94.9336 Td (3657 //) 30.5796 Tj 0 -104.427 Td (3658 // This file contains the low-level file system manipulati\ on) 283.9534 Tj 0 -113.9203 Td (3659 // routines. The $higher-level$ system call implementat\ ions) 283.9534 Tj 0 -123.4137 Td (3660 // are in sysfile.c.) 109.2129 Tj 0 -132.9071 Td (3661 ) 21.8426 Tj 0 -142.4004 Td (3662 #include "types.h") 100.4758 Tj 0 -151.8938 Td (3663 #include "defs.h") 96.1073 Tj 0 -161.3871 Td (3664 #include "param.h") 100.4758 Tj 0 -170.8805 Td (3665 #include "stat.h") 96.1073 Tj 0 -180.3739 Td (3666 #include "mmu.h") 91.7388 Tj 0 -189.8672 Td (3667 #include "proc.h") 96.1073 Tj 0 -199.3606 Td (3668 #include "spinlock.h") 113.5814 Tj 0 -208.8539 Td (3669 #include "buf.h") 91.7388 Tj 0 -218.3473 Td (3670 #include "fs.h") 87.3703 Tj 0 -227.8407 Td (3671 #include "file.h") 96.1073 Tj 0 -237.334 Td (3672 ) 21.8426 Tj 0 -246.8274 Td (3673 #define min$a, b$ $\(a$ < $b$ ? $a$ : $b$\)) 200.9517 Tj 0 -256.3207 Td (3674 static void itrunc$struct inode*$;) 170.3721 Tj 0 -265.8141 Td (3675 ) 21.8426 Tj 0 -275.3075 Td (3676 // Read the super block.) 126.6869 Tj 0 -284.8008 Td (3677 static void) 69.8962 Tj 0 -294.2942 Td (3678 readsb$int dev, struct superblock *sb$) 187.8461 Tj 0 -303.7875 Td (3679 {) 26.2111 Tj 0 -313.2809 Td (3680 struct buf *bp;) 96.1073 Tj 0 -322.7743 Td (3681 ) 21.8426 Tj 0 -332.2676 Td (3682 bp = bread$dev, 1$;) 113.5814 Tj 0 -341.761 Td (3683 memmove$sb, bp->data, sizeof\(*sb$\);) 183.4776 Tj 0 -351.2543 Td (3684 brelse$bp$;) 78.6333 Tj 0 -360.7477 Td (3685 }) 26.2111 Tj 0 -370.2411 Td (3686 ) 21.8426 Tj 0 -379.7344 Td (3687 // Zero a block.) 91.7388 Tj 0 -389.2278 Td (3688 static void) 69.8962 Tj 0 -398.7211 Td (3689 bzero$int dev, int bno$) 122.3184 Tj 0 -408.2145 Td (3690 {) 26.2111 Tj 0 -417.7079 Td (3691 struct buf *bp;) 96.1073 Tj 0 -427.2012 Td (3692 ) 21.8426 Tj 0 -436.6946 Td (3693 bp = bread$dev, bno$;) 122.3184 Tj 0 -446.1879 Td (3694 memset$bp->data, 0, BSIZE$;) 148.5295 Tj 0 -455.6813 Td (3695 bwrite$bp$;) 78.6333 Tj 0 -465.1747 Td (3696 brelse$bp$;) 78.6333 Tj 0 -474.668 Td (3697 }) 26.2111 Tj 0 -484.1614 Td (3698 ) 21.8426 Tj 0 -493.6547 Td (3699 ) 21.8426 Tj 0 -522.1348 Td (Sheet 36) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 44 44 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/fs.c Page 2) 152.898 Tj 0 -28.4801 Td (3700 // Blocks.) 65.5277 Tj 0 -37.9735 Td (3701 ) 21.8426 Tj 0 -47.4668 Td (3702 // Allocate a disk block.) 131.0554 Tj 0 -56.9602 Td (3703 static uint) 69.8962 Tj 0 -66.4535 Td (3704 balloc$uint dev$) 91.7388 Tj 0 -75.9469 Td (3705 {) 26.2111 Tj 0 -85.4403 Td (3706 int b, bi, m;) 87.3703 Tj 0 -94.9336 Td (3707 struct buf *bp;) 96.1073 Tj 0 -104.427 Td (3708 struct superblock sb;) 122.3184 Tj 0 -113.9203 Td (3709 ) 21.8426 Tj 0 -123.4137 Td (3710 bp = 0;) 61.1592 Tj 0 -132.9071 Td (3711 readsb$dev, &sb$;) 104.8443 Tj 0 -142.4004 Td (3712 for$b = 0; b < sb.size; b += BPB${) 179.1091 Tj 0 -151.8938 Td (3713 bp = bread$dev, BBLOCK\(b, sb.ninodes$\);) 209.6887 Tj 0 -161.3871 Td (3714 for$bi = 0; bi < BPB; bi++${) 161.635 Tj 0 -170.8805 Td (3715 m = 1 << $bi % 8$;) 126.6869 Tj 0 -180.3739 Td (3716 if$\(bp->data[bi/8] & m$ == 0\){ // Is block free\ ?) 262.1109 Tj 0 -189.8672 Td (3717 bp->data[bi/8] |= m; // Mark block in use on disk\ .) 279.5849 Tj 0 -199.3606 Td (3718 bwrite$bp$;) 104.8443 Tj 0 -208.8539 Td (3719 brelse$bp$;) 104.8443 Tj 0 -218.3473 Td (3720 return b + bi;) 117.9499 Tj 0 -227.8407 Td (3721 }) 52.4222 Tj 0 -237.334 Td (3722 }) 43.6851 Tj 0 -246.8274 Td (3723 brelse$bp$;) 87.3703 Tj 0 -256.3207 Td (3724 }) 34.9481 Tj 0 -265.8141 Td (3725 panic$"balloc: out of blocks"$;) 166.0035 Tj 0 -275.3075 Td (3726 }) 26.2111 Tj 0 -284.8008 Td (3727 ) 21.8426 Tj 0 -294.2942 Td (3728 // Free a disk block.) 113.5814 Tj 0 -303.7875 Td (3729 static void) 69.8962 Tj 0 -313.2809 Td (3730 bfree$int dev, uint b$) 117.9499 Tj 0 -322.7743 Td (3731 {) 26.2111 Tj 0 -332.2676 Td (3732 struct buf *bp;) 96.1073 Tj 0 -341.761 Td (3733 struct superblock sb;) 122.3184 Tj 0 -351.2543 Td (3734 int bi, m;) 74.2647 Tj 0 -360.7477 Td (3735 ) 21.8426 Tj 0 -370.2411 Td (3736 bzero$dev, b$;) 91.7388 Tj 0 -379.7344 Td (3737 ) 21.8426 Tj 0 -389.2278 Td (3738 readsb$dev, &sb$;) 104.8443 Tj 0 -398.7211 Td (3739 bp = bread$dev, BBLOCK\(b, sb.ninodes$\);) 200.9517 Tj 0 -408.2145 Td (3740 bi = b % BPB;) 87.3703 Tj 0 -417.7079 Td (3741 m = 1 << $bi % 8$;) 109.2129 Tj 0 -427.2012 Td (3742 if$\(bp->data[bi/8] & m$ == 0\)) 157.2665 Tj 0 -436.6946 Td (3743 panic$"freeing free block"$;) 161.635 Tj 0 -446.1879 Td (3744 bp->data[bi/8] &= ~m; // Mark block free on disk.) 249.0053 Tj 0 -455.6813 Td (3745 bwrite$bp$;) 78.6333 Tj 0 -465.1747 Td (3746 brelse$bp$;) 78.6333 Tj 0 -474.668 Td (3747 }) 26.2111 Tj 0 -484.1614 Td (3748 ) 21.8426 Tj 0 -493.6547 Td (3749 ) 21.8426 Tj 0 -522.1348 Td (Sheet 37) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/fs.c Page 3) 152.898 Tj 0 -28.4801 Td (3750 // Inodes.) 65.5277 Tj 0 -37.9735 Td (3751 //) 30.5796 Tj 0 -47.4668 Td (3752 // An inode is a single, unnamed file in the file system.) 270.8479 Tj 0 -56.9602 Td (3753 // The inode disk structure holds metadata $the type, dev\ ice numbers,) 323.2701 Tj 0 -66.4535 Td (3754 // and data size$ along with a list of blocks where the a\ ssociated) 310.1645 Tj 0 -75.9469 Td (3755 // data can be found.) 113.5814 Tj 0 -85.4403 Td (3756 //) 30.5796 Tj 0 -94.9336 Td (3757 // The inodes are laid out sequentially on disk immediatel\ y after) 305.796 Tj 0 -104.427 Td (3758 // the superblock. The kernel keeps a cache of the in-use) 275.2164 Tj 0 -113.9203 Td (3759 // on-disk structures to provide a place for synchronizing\ access) 305.796 Tj 0 -123.4137 Td (3760 // to inodes shared between multiple processes.) 227.1628 Tj 0 -132.9071 Td (3761 //) 30.5796 Tj 0 -142.4004 Td (3762 // ip->ref counts the number of pointer references to this\ cached) 305.796 Tj 0 -151.8938 Td (3763 // inode; references are typically kept in struct file and\ in proc->cwd.) 336.3756 Tj 0 -161.3871 Td (3764 // When ip->ref falls to zero, the inode is no longer cach\ ed.) 288.322 Tj 0 -170.8805 Td (3765 // It is an error to use an inode without holding a refere\ nce to it.) 318.9016 Tj 0 -180.3739 Td (3766 //) 30.5796 Tj 0 -189.8672 Td (3767 // Processes are only allowed to read and write inode) 253.3738 Tj 0 -199.3606 Td (3768 // metadata and contents when holding the inode's lock,) 262.1109 Tj 0 -208.8539 Td (3769 // represented by the I_BUSY flag in the in-memory copy.) 266.4794 Tj 0 -218.3473 Td (3770 // Because inode locks are held during disk accesses,) 253.3738 Tj 0 -227.8407 Td (3771 // they are implemented using a flag rather than with) 253.3738 Tj 0 -237.334 Td (3772 // spin locks. Callers are responsible for locking) 244.6368 Tj 0 -246.8274 Td (3773 // inodes before passing them to routines in this file; le\ aving) 297.059 Tj 0 -256.3207 Td (3774 // this responsibility with the caller makes it possible f\ or them) 305.796 Tj 0 -265.8141 Td (3775 // to create arbitrarily-sized atomic operations.) 235.8998 Tj 0 -275.3075 Td (3776 //) 30.5796 Tj 0 -284.8008 Td (3777 // To give maximum control over locking to the callers,) 262.1109 Tj 0 -294.2942 Td (3778 // the routines in this file that return inode pointers) 262.1109 Tj 0 -303.7875 Td (3779 // return pointers to *unlocked* inodes. It is the caller\ s') 283.9534 Tj 0 -313.2809 Td (3780 // responsibility to lock them before using them. A non-z\ ero) 288.322 Tj 0 -322.7743 Td (3781 // ip->ref keeps these unlocked inodes in the cache.) 249.0053 Tj 0 -332.2676 Td (3782 ) 21.8426 Tj 0 -341.761 Td (3783 struct {) 56.7907 Tj 0 -351.2543 Td (3784 struct spinlock lock;) 122.3184 Tj 0 -360.7477 Td (3785 struct inode inode[NINODE];) 148.5295 Tj 0 -370.2411 Td (3786 } icache;) 61.1592 Tj 0 -379.7344 Td (3787 ) 21.8426 Tj 0 -389.2278 Td (3788 void) 39.3166 Tj 0 -398.7211 Td (3789 iinit$void$) 69.8962 Tj 0 -408.2145 Td (3790 {) 26.2111 Tj 0 -417.7079 Td (3791 initlock$&icache.lock, "icache"$;) 174.7406 Tj 0 -427.2012 Td (3792 }) 26.2111 Tj 0 -436.6946 Td (3793 ) 21.8426 Tj 0 -446.1879 Td (3794 static struct inode* iget$uint dev, uint inum$;) 227.1628 Tj 0 -455.6813 Td (3795 ) 21.8426 Tj 0 -465.1747 Td (3796 ) 21.8426 Tj 0 -474.668 Td (3797 ) 21.8426 Tj 0 -484.1614 Td (3798 ) 21.8426 Tj 0 -493.6547 Td (3799 ) 21.8426 Tj 0 -522.1348 Td (Sheet 37) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 45 45 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/fs.c Page 4) 152.898 Tj 0 -28.4801 Td (3800 // Allocate a new inode with the given type on device dev.) 275.2164 Tj 0 -37.9735 Td (3801 struct inode*) 78.6333 Tj 0 -47.4668 Td (3802 ialloc$uint dev, short type$) 144.161 Tj 0 -56.9602 Td (3803 {) 26.2111 Tj 0 -66.4535 Td (3804 int inum;) 69.8962 Tj 0 -75.9469 Td (3805 struct buf *bp;) 96.1073 Tj 0 -85.4403 Td (3806 struct dinode *dip;) 113.5814 Tj 0 -94.9336 Td (3807 struct superblock sb;) 122.3184 Tj 0 -104.427 Td (3808 ) 21.8426 Tj 0 -113.9203 Td (3809 readsb$dev, &sb$;) 104.8443 Tj 0 -123.4137 Td (3810 for$inum = 1; inum < sb.ninodes; inum++${ // loop ove\ r inode blocks) 327.6386 Tj 0 -132.9071 Td (3811 bp = bread$dev, IBLOCK\(inum$\);) 170.3721 Tj 0 -142.4004 Td (3812 dip = $struct dinode*$bp->data + inum%IPB;) 222.7942 Tj 0 -151.8938 Td (3813 if$dip->type == 0${ // a free inode) 196.5831 Tj 0 -161.3871 Td (3814 memset$dip, 0, sizeof\(*dip$\);) 174.7406 Tj 0 -170.8805 Td (3815 dip->type = type;) 122.3184 Tj 0 -180.3739 Td (3816 bwrite$bp$; // mark it allocated on the disk) 249.0053 Tj 0 -189.8672 Td (3817 brelse$bp$;) 96.1073 Tj 0 -199.3606 Td (3818 return iget$dev, inum$;) 148.5295 Tj 0 -208.8539 Td (3819 }) 43.6851 Tj 0 -218.3473 Td (3820 brelse$bp$;) 87.3703 Tj 0 -227.8407 Td (3821 }) 34.9481 Tj 0 -237.334 Td (3822 panic$"ialloc: no inodes"$;) 148.5295 Tj 0 -246.8274 Td (3823 }) 26.2111 Tj 0 -256.3207 Td (3824 ) 21.8426 Tj 0 -265.8141 Td (3825 // Copy inode, which has changed, from memory to disk.) 257.7424 Tj 0 -275.3075 Td (3826 void) 39.3166 Tj 0 -284.8008 Td (3827 iupdate$struct inode *ip$) 131.0554 Tj 0 -294.2942 Td (3828 {) 26.2111 Tj 0 -303.7875 Td (3829 struct buf *bp;) 96.1073 Tj 0 -313.2809 Td (3830 struct dinode *dip;) 113.5814 Tj 0 -322.7743 Td (3831 ) 21.8426 Tj 0 -332.2676 Td (3832 bp = bread$ip->dev, IBLOCK\(ip->inum$\);) 196.5831 Tj 0 -341.761 Td (3833 dip = $struct dinode*$bp->data + ip->inum%IPB;) 231.5313 Tj 0 -351.2543 Td (3834 dip->type = ip->type;) 122.3184 Tj 0 -360.7477 Td (3835 dip->major = ip->major;) 131.0554 Tj 0 -370.2411 Td (3836 dip->minor = ip->minor;) 131.0554 Tj 0 -379.7344 Td (3837 dip->nlink = ip->nlink;) 131.0554 Tj 0 -389.2278 Td (3838 dip->size = ip->size;) 122.3184 Tj 0 -398.7211 Td (3839 memmove$dip->addrs, ip->addrs, sizeof\(ip->addrs$\);) 249.0053 Tj 0 -408.2145 Td (3840 bwrite$bp$;) 78.6333 Tj 0 -417.7079 Td (3841 brelse$bp$;) 78.6333 Tj 0 -427.2012 Td (3842 }) 26.2111 Tj 0 -436.6946 Td (3843 ) 21.8426 Tj 0 -446.1879 Td (3844 ) 21.8426 Tj 0 -455.6813 Td (3845 ) 21.8426 Tj 0 -465.1747 Td (3846 ) 21.8426 Tj 0 -474.668 Td (3847 ) 21.8426 Tj 0 -484.1614 Td (3848 ) 21.8426 Tj 0 -493.6547 Td (3849 ) 21.8426 Tj 0 -522.1348 Td (Sheet 38) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/fs.c Page 5) 152.898 Tj 0 -28.4801 Td (3850 // Find the inode with number inum on device dev) 231.5313 Tj 0 -37.9735 Td (3851 // and return the in-memory copy.) 166.0035 Tj 0 -47.4668 Td (3852 static struct inode*) 109.2129 Tj 0 -56.9602 Td (3853 iget$uint dev, uint inum$) 131.0554 Tj 0 -66.4535 Td (3854 {) 26.2111 Tj 0 -75.9469 Td (3855 struct inode *ip, *empty;) 139.7925 Tj 0 -85.4403 Td (3856 ) 21.8426 Tj 0 -94.9336 Td (3857 acquire$&icache.lock$;) 126.6869 Tj 0 -104.427 Td (3858 ) 21.8426 Tj 0 -113.9203 Td (3859 // Try for cached inode.) 135.4239 Tj 0 -123.4137 Td (3860 empty = 0;) 74.2647 Tj 0 -132.9071 Td (3861 for$ip = &icache.inode[0]; ip < &icache.inode[NINODE]; \ ip++${) 297.059 Tj 0 -142.4004 Td (3862 if$ip->ref > 0 && ip->dev == dev && ip->inum == inum$\ {) 275.2164 Tj 0 -151.8938 Td (3863 ip->ref++;) 91.7388 Tj 0 -161.3871 Td (3864 release$&icache.lock$;) 144.161 Tj 0 -170.8805 Td (3865 return ip;) 91.7388 Tj 0 -180.3739 Td (3866 }) 43.6851 Tj 0 -189.8672 Td (3867 if$empty == 0 && ip->ref == 0$ // Remember empty \ slot.) 288.322 Tj 0 -199.3606 Td (3868 empty = ip;) 96.1073 Tj 0 -208.8539 Td (3869 }) 34.9481 Tj 0 -218.3473 Td (3870 ) 21.8426 Tj 0 -227.8407 Td (3871 // Allocate fresh inode.) 135.4239 Tj 0 -237.334 Td (3872 if$empty == 0$) 91.7388 Tj 0 -246.8274 Td (3873 panic$"iget: no inodes"$;) 148.5295 Tj 0 -256.3207 Td (3874 ) 21.8426 Tj 0 -265.8141 Td (3875 ip = empty;) 78.6333 Tj 0 -275.3075 Td (3876 ip->dev = dev;) 91.7388 Tj 0 -284.8008 Td (3877 ip->inum = inum;) 100.4758 Tj 0 -294.2942 Td (3878 ip->ref = 1;) 83.0018 Tj 0 -303.7875 Td (3879 ip->flags = 0;) 91.7388 Tj 0 -313.2809 Td (3880 release$&icache.lock$;) 126.6869 Tj 0 -322.7743 Td (3881 ) 21.8426 Tj 0 -332.2676 Td (3882 return ip;) 74.2647 Tj 0 -341.761 Td (3883 }) 26.2111 Tj 0 -351.2543 Td (3884 ) 21.8426 Tj 0 -360.7477 Td (3885 // Increment reference count for ip.) 179.1091 Tj 0 -370.2411 Td (3886 // Returns ip to enable ip = idup$ip1$ idiom.) 218.4257 Tj 0 -379.7344 Td (3887 struct inode*) 78.6333 Tj 0 -389.2278 Td (3888 idup$struct inode *ip$) 117.9499 Tj 0 -398.7211 Td (3889 {) 26.2111 Tj 0 -408.2145 Td (3890 acquire$&icache.lock$;) 126.6869 Tj 0 -417.7079 Td (3891 ip->ref++;) 74.2647 Tj 0 -427.2012 Td (3892 release$&icache.lock$;) 126.6869 Tj 0 -436.6946 Td (3893 return ip;) 74.2647 Tj 0 -446.1879 Td (3894 }) 26.2111 Tj 0 -455.6813 Td (3895 ) 21.8426 Tj 0 -465.1747 Td (3896 ) 21.8426 Tj 0 -474.668 Td (3897 ) 21.8426 Tj 0 -484.1614 Td (3898 ) 21.8426 Tj 0 -493.6547 Td (3899 ) 21.8426 Tj 0 -522.1348 Td (Sheet 38) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 46 46 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/fs.c Page 6) 152.898 Tj 0 -28.4801 Td (3900 // Lock the given inode.) 126.6869 Tj 0 -37.9735 Td (3901 void) 39.3166 Tj 0 -47.4668 Td (3902 ilock$struct inode *ip$) 122.3184 Tj 0 -56.9602 Td (3903 {) 26.2111 Tj 0 -66.4535 Td (3904 struct buf *bp;) 96.1073 Tj 0 -75.9469 Td (3905 struct dinode *dip;) 113.5814 Tj 0 -85.4403 Td (3906 ) 21.8426 Tj 0 -94.9336 Td (3907 if$ip == 0 || ip->ref < 1$) 144.161 Tj 0 -104.427 Td (3908 panic$"ilock"$;) 104.8443 Tj 0 -113.9203 Td (3909 ) 21.8426 Tj 0 -123.4137 Td (3910 acquire$&icache.lock$;) 126.6869 Tj 0 -132.9071 Td (3911 while$ip->flags & I_BUSY$) 139.7925 Tj 0 -142.4004 Td (3912 sleep$ip, &icache.lock$;) 144.161 Tj 0 -151.8938 Td (3913 ip->flags |= I_BUSY;) 117.9499 Tj 0 -161.3871 Td (3914 release$&icache.lock$;) 126.6869 Tj 0 -170.8805 Td (3915 ) 21.8426 Tj 0 -180.3739 Td (3916 if$!\(ip->flags & I_VALID$\){) 148.5295 Tj 0 -189.8672 Td (3917 bp = bread$ip->dev, IBLOCK\(ip->inum$\);) 205.3202 Tj 0 -199.3606 Td (3918 dip = $struct dinode*$bp->data + ip->inum%IPB;) 240.2683 Tj 0 -208.8539 Td (3919 ip->type = dip->type;) 131.0554 Tj 0 -218.3473 Td (3920 ip->major = dip->major;) 139.7925 Tj 0 -227.8407 Td (3921 ip->minor = dip->minor;) 139.7925 Tj 0 -237.334 Td (3922 ip->nlink = dip->nlink;) 139.7925 Tj 0 -246.8274 Td (3923 ip->size = dip->size;) 131.0554 Tj 0 -256.3207 Td (3924 memmove$ip->addrs, dip->addrs, sizeof\(ip->addrs$\);) 257.7424 Tj 0 -265.8141 Td (3925 brelse$bp$;) 87.3703 Tj 0 -275.3075 Td (3926 ip->flags |= I_VALID;) 131.0554 Tj 0 -284.8008 Td (3927 if$ip->type == 0$) 113.5814 Tj 0 -294.2942 Td (3928 panic$"ilock: no type"$;) 152.898 Tj 0 -303.7875 Td (3929 }) 34.9481 Tj 0 -313.2809 Td (3930 }) 26.2111 Tj 0 -322.7743 Td (3931 ) 21.8426 Tj 0 -332.2676 Td (3932 // Unlock the given inode.) 135.4239 Tj 0 -341.761 Td (3933 void) 39.3166 Tj 0 -351.2543 Td (3934 iunlock$struct inode *ip$) 131.0554 Tj 0 -360.7477 Td (3935 {) 26.2111 Tj 0 -370.2411 Td (3936 if$ip == 0 || !\(ip->flags & I_BUSY$ || ip->ref < 1\)) 253.3738 Tj 0 -379.7344 Td (3937 panic$"iunlock"$;) 113.5814 Tj 0 -389.2278 Td (3938 ) 21.8426 Tj 0 -398.7211 Td (3939 acquire$&icache.lock$;) 126.6869 Tj 0 -408.2145 Td (3940 ip->flags &= ~I_BUSY;) 122.3184 Tj 0 -417.7079 Td (3941 wakeup$ip$;) 78.6333 Tj 0 -427.2012 Td (3942 release$&icache.lock$;) 126.6869 Tj 0 -436.6946 Td (3943 }) 26.2111 Tj 0 -446.1879 Td (3944 ) 21.8426 Tj 0 -455.6813 Td (3945 ) 21.8426 Tj 0 -465.1747 Td (3946 ) 21.8426 Tj 0 -474.668 Td (3947 ) 21.8426 Tj 0 -484.1614 Td (3948 ) 21.8426 Tj 0 -493.6547 Td (3949 ) 21.8426 Tj 0 -522.1348 Td (Sheet 39) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/fs.c Page 7) 152.898 Tj 0 -28.4801 Td (3950 // Caller holds reference to unlocked ip. Drop reference.) 275.2164 Tj 0 -37.9735 Td (3951 void) 39.3166 Tj 0 -47.4668 Td (3952 iput$struct inode *ip$) 117.9499 Tj 0 -56.9602 Td (3953 {) 26.2111 Tj 0 -66.4535 Td (3954 acquire$&icache.lock$;) 126.6869 Tj 0 -75.9469 Td (3955 if$ip->ref == 1 && \(ip->flags & I_VALID$ && ip->nlink\ == 0\){) 292.6905 Tj 0 -85.4403 Td (3956 // inode is no longer used: truncate and free inode.) 266.4794 Tj 0 -94.9336 Td (3957 if$ip->flags & I_BUSY$) 135.4239 Tj 0 -104.427 Td (3958 panic$"iput busy"$;) 131.0554 Tj 0 -113.9203 Td (3959 ip->flags |= I_BUSY;) 126.6869 Tj 0 -123.4137 Td (3960 release$&icache.lock$;) 135.4239 Tj 0 -132.9071 Td (3961 itrunc$ip$;) 87.3703 Tj 0 -142.4004 Td (3962 ip->type = 0;) 96.1073 Tj 0 -151.8938 Td (3963 iupdate$ip$;) 91.7388 Tj 0 -161.3871 Td (3964 acquire$&icache.lock$;) 135.4239 Tj 0 -170.8805 Td (3965 ip->flags = 0;) 100.4758 Tj 0 -180.3739 Td (3966 wakeup$ip$;) 87.3703 Tj 0 -189.8672 Td (3967 }) 34.9481 Tj 0 -199.3606 Td (3968 ip->ref--;) 74.2647 Tj 0 -208.8539 Td (3969 release$&icache.lock$;) 126.6869 Tj 0 -218.3473 Td (3970 }) 26.2111 Tj 0 -227.8407 Td (3971 ) 21.8426 Tj 0 -237.334 Td (3972 // Common idiom: unlock, then put.) 170.3721 Tj 0 -246.8274 Td (3973 void) 39.3166 Tj 0 -256.3207 Td (3974 iunlockput$struct inode *ip$) 144.161 Tj 0 -265.8141 Td (3975 {) 26.2111 Tj 0 -275.3075 Td (3976 iunlock$ip$;) 83.0018 Tj 0 -284.8008 Td (3977 iput$ip$;) 69.8962 Tj 0 -294.2942 Td (3978 }) 26.2111 Tj 0 -303.7875 Td (3979 ) 21.8426 Tj 0 -313.2809 Td (3980 ) 21.8426 Tj 0 -322.7743 Td (3981 ) 21.8426 Tj 0 -332.2676 Td (3982 ) 21.8426 Tj 0 -341.761 Td (3983 ) 21.8426 Tj 0 -351.2543 Td (3984 ) 21.8426 Tj 0 -360.7477 Td (3985 ) 21.8426 Tj 0 -370.2411 Td (3986 ) 21.8426 Tj 0 -379.7344 Td (3987 ) 21.8426 Tj 0 -389.2278 Td (3988 ) 21.8426 Tj 0 -398.7211 Td (3989 ) 21.8426 Tj 0 -408.2145 Td (3990 ) 21.8426 Tj 0 -417.7079 Td (3991 ) 21.8426 Tj 0 -427.2012 Td (3992 ) 21.8426 Tj 0 -436.6946 Td (3993 ) 21.8426 Tj 0 -446.1879 Td (3994 ) 21.8426 Tj 0 -455.6813 Td (3995 ) 21.8426 Tj 0 -465.1747 Td (3996 ) 21.8426 Tj 0 -474.668 Td (3997 ) 21.8426 Tj 0 -484.1614 Td (3998 ) 21.8426 Tj 0 -493.6547 Td (3999 ) 21.8426 Tj 0 -522.1348 Td (Sheet 39) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 47 47 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/fs.c Page 8) 152.898 Tj 0 -28.4801 Td (4000 // Inode contents) 96.1073 Tj 0 -37.9735 Td (4001 //) 30.5796 Tj 0 -47.4668 Td (4002 // The contents $data$ associated with each inode is sto\ red) 279.5849 Tj 0 -56.9602 Td (4003 // in a sequence of blocks on the disk. The first NDIRECT\ blocks) 305.796 Tj 0 -66.4535 Td (4004 // are listed in ip->addrs[]. The next NINDIRECT blocks a\ re) 283.9534 Tj 0 -75.9469 Td (4005 // listed in the block ip->addrs[INDIRECT].) 209.6887 Tj 0 -85.4403 Td (4006 ) 21.8426 Tj 0 -94.9336 Td (4007 // Return the disk block address of the nth block in inode\ ip.) 292.6905 Tj 0 -104.427 Td (4008 // If there is no such block, bmap allocates one.) 235.8998 Tj 0 -113.9203 Td (4009 static uint) 69.8962 Tj 0 -123.4137 Td (4010 bmap$struct inode *ip, uint bn$) 157.2665 Tj 0 -132.9071 Td (4011 {) 26.2111 Tj 0 -142.4004 Td (4012 uint addr, *a;) 91.7388 Tj 0 -151.8938 Td (4013 struct buf *bp;) 96.1073 Tj 0 -161.3871 Td (4014 ) 21.8426 Tj 0 -170.8805 Td (4015 if$bn < NDIRECT${) 104.8443 Tj 0 -180.3739 Td (4016 if$\(addr = ip->addrs[bn]$ == 0\)) 174.7406 Tj 0 -189.8672 Td (4017 ip->addrs[bn] = addr = balloc$ip->dev$;) 218.4257 Tj 0 -199.3606 Td (4018 return addr;) 91.7388 Tj 0 -208.8539 Td (4019 }) 34.9481 Tj 0 -218.3473 Td (4020 bn -= NDIRECT;) 91.7388 Tj 0 -227.8407 Td (4021 ) 21.8426 Tj 0 -237.334 Td (4022 if$bn < NINDIRECT${) 113.5814 Tj 0 -246.8274 Td (4023 // Load indirect block, allocating if necessary.) 249.0053 Tj 0 -256.3207 Td (4024 if$\(addr = ip->addrs[NDIRECT]$ == 0\)) 196.5831 Tj 0 -265.8141 Td (4025 ip->addrs[NDIRECT] = addr = balloc$ip->dev$;) 240.2683 Tj 0 -275.3075 Td (4026 bp = bread$ip->dev, addr$;) 152.898 Tj 0 -284.8008 Td (4027 a = $uint*$bp->data;) 126.6869 Tj 0 -294.2942 Td (4028 if$\(addr = a[bn]$ == 0\){) 144.161 Tj 0 -303.7875 Td (4029 a[bn] = addr = balloc$ip->dev$;) 183.4776 Tj 0 -313.2809 Td (4030 bwrite$bp$;) 96.1073 Tj 0 -322.7743 Td (4031 }) 43.6851 Tj 0 -332.2676 Td (4032 brelse$bp$;) 87.3703 Tj 0 -341.761 Td (4033 return addr;) 91.7388 Tj 0 -351.2543 Td (4034 }) 34.9481 Tj 0 -360.7477 Td (4035 ) 21.8426 Tj 0 -370.2411 Td (4036 panic$"bmap: out of range"$;) 152.898 Tj 0 -379.7344 Td (4037 }) 26.2111 Tj 0 -389.2278 Td (4038 ) 21.8426 Tj 0 -398.7211 Td (4039 ) 21.8426 Tj 0 -408.2145 Td (4040 ) 21.8426 Tj 0 -417.7079 Td (4041 ) 21.8426 Tj 0 -427.2012 Td (4042 ) 21.8426 Tj 0 -436.6946 Td (4043 ) 21.8426 Tj 0 -446.1879 Td (4044 ) 21.8426 Tj 0 -455.6813 Td (4045 ) 21.8426 Tj 0 -465.1747 Td (4046 ) 21.8426 Tj 0 -474.668 Td (4047 ) 21.8426 Tj 0 -484.1614 Td (4048 ) 21.8426 Tj 0 -493.6547 Td (4049 ) 21.8426 Tj 0 -522.1348 Td (Sheet 40) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/fs.c Page 9) 152.898 Tj 0 -28.4801 Td (4050 // Truncate inode $discard contents$.) 183.4776 Tj 0 -37.9735 Td (4051 // Only called after the last dirent referring) 222.7942 Tj 0 -47.4668 Td (4052 // to this inode has been erased on disk.) 200.9517 Tj 0 -56.9602 Td (4053 static void) 69.8962 Tj 0 -66.4535 Td (4054 itrunc$struct inode *ip$) 126.6869 Tj 0 -75.9469 Td (4055 {) 26.2111 Tj 0 -85.4403 Td (4056 int i, j;) 69.8962 Tj 0 -94.9336 Td (4057 struct buf *bp;) 96.1073 Tj 0 -104.427 Td (4058 uint *a;) 65.5277 Tj 0 -113.9203 Td (4059 ) 21.8426 Tj 0 -123.4137 Td (4060 for$i = 0; i < NDIRECT; i++${) 157.2665 Tj 0 -132.9071 Td (4061 if$ip->addrs[i]${) 113.5814 Tj 0 -142.4004 Td (4062 bfree$ip->dev, ip->addrs[i]$;) 174.7406 Tj 0 -151.8938 Td (4063 ip->addrs[i] = 0;) 122.3184 Tj 0 -161.3871 Td (4064 }) 43.6851 Tj 0 -170.8805 Td (4065 }) 34.9481 Tj 0 -180.3739 Td (4066 ) 21.8426 Tj 0 -189.8672 Td (4067 if$ip->addrs[NDIRECT]${) 131.0554 Tj 0 -199.3606 Td (4068 bp = bread$ip->dev, ip->addrs[NDIRECT]$;) 214.0572 Tj 0 -208.8539 Td (4069 a = $uint*$bp->data;) 126.6869 Tj 0 -218.3473 Td (4070 for$j = 0; j < NINDIRECT; j++${) 174.7406 Tj 0 -227.8407 Td (4071 if$a[j]$) 83.0018 Tj 0 -237.334 Td (4072 bfree$ip->dev, a[j]$;) 148.5295 Tj 0 -246.8274 Td (4073 }) 43.6851 Tj 0 -256.3207 Td (4074 brelse$bp$;) 87.3703 Tj 0 -265.8141 Td (4075 bfree$ip->dev, ip->addrs[NDIRECT]$;) 192.2146 Tj 0 -275.3075 Td (4076 ip->addrs[NDIRECT] = 0;) 139.7925 Tj 0 -284.8008 Td (4077 }) 34.9481 Tj 0 -294.2942 Td (4078 ) 21.8426 Tj 0 -303.7875 Td (4079 ip->size = 0;) 87.3703 Tj 0 -313.2809 Td (4080 iupdate$ip$;) 83.0018 Tj 0 -322.7743 Td (4081 }) 26.2111 Tj 0 -332.2676 Td (4082 ) 21.8426 Tj 0 -341.761 Td (4083 // Copy stat information from inode.) 179.1091 Tj 0 -351.2543 Td (4084 void) 39.3166 Tj 0 -360.7477 Td (4085 stati$struct inode *ip, struct stat *st$) 196.5831 Tj 0 -370.2411 Td (4086 {) 26.2111 Tj 0 -379.7344 Td (4087 st->dev = ip->dev;) 109.2129 Tj 0 -389.2278 Td (4088 st->ino = ip->inum;) 113.5814 Tj 0 -398.7211 Td (4089 st->type = ip->type;) 117.9499 Tj 0 -408.2145 Td (4090 st->nlink = ip->nlink;) 126.6869 Tj 0 -417.7079 Td (4091 st->size = ip->size;) 117.9499 Tj 0 -427.2012 Td (4092 }) 26.2111 Tj 0 -436.6946 Td (4093 ) 21.8426 Tj 0 -446.1879 Td (4094 ) 21.8426 Tj 0 -455.6813 Td (4095 ) 21.8426 Tj 0 -465.1747 Td (4096 ) 21.8426 Tj 0 -474.668 Td (4097 ) 21.8426 Tj 0 -484.1614 Td (4098 ) 21.8426 Tj 0 -493.6547 Td (4099 ) 21.8426 Tj 0 -522.1348 Td (Sheet 40) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 48 48 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/fs.c Page 10) 157.2665 Tj 0 -28.4801 Td (4100 // Read data from inode.) 126.6869 Tj 0 -37.9735 Td (4101 int) 34.9481 Tj 0 -47.4668 Td (4102 readi$struct inode *ip, char *dst, uint off, uint n$) 249.0053 Tj 0 -56.9602 Td (4103 {) 26.2111 Tj 0 -66.4535 Td (4104 uint tot, m;) 83.0018 Tj 0 -75.9469 Td (4105 struct buf *bp;) 96.1073 Tj 0 -85.4403 Td (4106 ) 21.8426 Tj 0 -94.9336 Td (4107 if$ip->type == T_DEV${) 126.6869 Tj 0 -104.427 Td (4108 if$ip->major < 0 || ip->major >= NDEV || !devsw[ip->m\ ajor].read$) 318.9016 Tj 0 -113.9203 Td (4109 return -1;) 91.7388 Tj 0 -123.4137 Td (4110 return devsw[ip->major].read$ip, dst, n$;) 218.4257 Tj 0 -132.9071 Td (4111 }) 34.9481 Tj 0 -142.4004 Td (4112 ) 21.8426 Tj 0 -151.8938 Td (4113 if$off > ip->size || off + n < off$) 183.4776 Tj 0 -161.3871 Td (4114 return -1;) 83.0018 Tj 0 -170.8805 Td (4115 if$off + n > ip->size$) 126.6869 Tj 0 -180.3739 Td (4116 n = ip->size - off;) 122.3184 Tj 0 -189.8672 Td (4117 ) 21.8426 Tj 0 -199.3606 Td (4118 for$tot=0; totdev, bmap\(ip, off/BSIZE$\);) 218.4257 Tj 0 -218.3473 Td (4120 m = min$n - tot, BSIZE - off%BSIZE$;) 196.5831 Tj 0 -227.8407 Td (4121 memmove$dst, bp->data + off%BSIZE, m$;) 205.3202 Tj 0 -237.334 Td (4122 brelse$bp$;) 87.3703 Tj 0 -246.8274 Td (4123 }) 34.9481 Tj 0 -256.3207 Td (4124 return n;) 69.8962 Tj 0 -265.8141 Td (4125 }) 26.2111 Tj 0 -275.3075 Td (4126 ) 21.8426 Tj 0 -284.8008 Td (4127 ) 21.8426 Tj 0 -294.2942 Td (4128 ) 21.8426 Tj 0 -303.7875 Td (4129 ) 21.8426 Tj 0 -313.2809 Td (4130 ) 21.8426 Tj 0 -322.7743 Td (4131 ) 21.8426 Tj 0 -332.2676 Td (4132 ) 21.8426 Tj 0 -341.761 Td (4133 ) 21.8426 Tj 0 -351.2543 Td (4134 ) 21.8426 Tj 0 -360.7477 Td (4135 ) 21.8426 Tj 0 -370.2411 Td (4136 ) 21.8426 Tj 0 -379.7344 Td (4137 ) 21.8426 Tj 0 -389.2278 Td (4138 ) 21.8426 Tj 0 -398.7211 Td (4139 ) 21.8426 Tj 0 -408.2145 Td (4140 ) 21.8426 Tj 0 -417.7079 Td (4141 ) 21.8426 Tj 0 -427.2012 Td (4142 ) 21.8426 Tj 0 -436.6946 Td (4143 ) 21.8426 Tj 0 -446.1879 Td (4144 ) 21.8426 Tj 0 -455.6813 Td (4145 ) 21.8426 Tj 0 -465.1747 Td (4146 ) 21.8426 Tj 0 -474.668 Td (4147 ) 21.8426 Tj 0 -484.1614 Td (4148 ) 21.8426 Tj 0 -493.6547 Td (4149 ) 21.8426 Tj 0 -522.1348 Td (Sheet 41) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/fs.c Page 11) 157.2665 Tj 0 -28.4801 Td (4150 // Write data to inode.) 122.3184 Tj 0 -37.9735 Td (4151 int) 34.9481 Tj 0 -47.4668 Td (4152 writei$struct inode *ip, char *src, uint off, uint n$) 253.3738 Tj 0 -56.9602 Td (4153 {) 26.2111 Tj 0 -66.4535 Td (4154 uint tot, m;) 83.0018 Tj 0 -75.9469 Td (4155 struct buf *bp;) 96.1073 Tj 0 -85.4403 Td (4156 ) 21.8426 Tj 0 -94.9336 Td (4157 if$ip->type == T_DEV${) 126.6869 Tj 0 -104.427 Td (4158 if$ip->major < 0 || ip->major >= NDEV || !devsw[ip->m\ ajor].write$) 323.2701 Tj 0 -113.9203 Td (4159 return -1;) 91.7388 Tj 0 -123.4137 Td (4160 return devsw[ip->major].write$ip, src, n$;) 222.7942 Tj 0 -132.9071 Td (4161 }) 34.9481 Tj 0 -142.4004 Td (4162 ) 21.8426 Tj 0 -151.8938 Td (4163 if$off > ip->size || off + n < off$) 183.4776 Tj 0 -161.3871 Td (4164 return -1;) 83.0018 Tj 0 -170.8805 Td (4165 if$off + n > MAXFILE*BSIZE$) 148.5295 Tj 0 -180.3739 Td (4166 n = MAXFILE*BSIZE - off;) 144.161 Tj 0 -189.8672 Td (4167 ) 21.8426 Tj 0 -199.3606 Td (4168 for$tot=0; totdev, bmap\(ip, off/BSIZE$\);) 218.4257 Tj 0 -218.3473 Td (4170 m = min$n - tot, BSIZE - off%BSIZE$;) 196.5831 Tj 0 -227.8407 Td (4171 memmove$bp->data + off%BSIZE, src, m$;) 205.3202 Tj 0 -237.334 Td (4172 bwrite$bp$;) 87.3703 Tj 0 -246.8274 Td (4173 brelse$bp$;) 87.3703 Tj 0 -256.3207 Td (4174 }) 34.9481 Tj 0 -265.8141 Td (4175 ) 21.8426 Tj 0 -275.3075 Td (4176 if$n > 0 && off > ip->size${) 152.898 Tj 0 -284.8008 Td (4177 ip->size = off;) 104.8443 Tj 0 -294.2942 Td (4178 iupdate$ip$;) 91.7388 Tj 0 -303.7875 Td (4179 }) 34.9481 Tj 0 -313.2809 Td (4180 return n;) 69.8962 Tj 0 -322.7743 Td (4181 }) 26.2111 Tj 0 -332.2676 Td (4182 ) 21.8426 Tj 0 -341.761 Td (4183 ) 21.8426 Tj 0 -351.2543 Td (4184 ) 21.8426 Tj 0 -360.7477 Td (4185 ) 21.8426 Tj 0 -370.2411 Td (4186 ) 21.8426 Tj 0 -379.7344 Td (4187 ) 21.8426 Tj 0 -389.2278 Td (4188 ) 21.8426 Tj 0 -398.7211 Td (4189 ) 21.8426 Tj 0 -408.2145 Td (4190 ) 21.8426 Tj 0 -417.7079 Td (4191 ) 21.8426 Tj 0 -427.2012 Td (4192 ) 21.8426 Tj 0 -436.6946 Td (4193 ) 21.8426 Tj 0 -446.1879 Td (4194 ) 21.8426 Tj 0 -455.6813 Td (4195 ) 21.8426 Tj 0 -465.1747 Td (4196 ) 21.8426 Tj 0 -474.668 Td (4197 ) 21.8426 Tj 0 -484.1614 Td (4198 ) 21.8426 Tj 0 -493.6547 Td (4199 ) 21.8426 Tj 0 -522.1348 Td (Sheet 41) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 49 49 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/fs.c Page 12) 157.2665 Tj 0 -28.4801 Td (4200 // Directories) 83.0018 Tj 0 -37.9735 Td (4201 ) 21.8426 Tj 0 -47.4668 Td (4202 int) 34.9481 Tj 0 -56.9602 Td (4203 namecmp$const char *s, const char *t$) 183.4776 Tj 0 -66.4535 Td (4204 {) 26.2111 Tj 0 -75.9469 Td (4205 return strncmp$s, t, DIRSIZ$;) 157.2665 Tj 0 -85.4403 Td (4206 }) 26.2111 Tj 0 -94.9336 Td (4207 ) 21.8426 Tj 0 -104.427 Td (4208 // Look for a directory entry in a directory.) 218.4257 Tj 0 -113.9203 Td (4209 // If found, set *poff to byte offset of entry.) 227.1628 Tj 0 -123.4137 Td (4210 // Caller must have already locked dp.) 187.8461 Tj 0 -132.9071 Td (4211 struct inode*) 78.6333 Tj 0 -142.4004 Td (4212 dirlookup$struct inode *dp, char *name, uint *poff$) 244.6368 Tj 0 -151.8938 Td (4213 {) 26.2111 Tj 0 -161.3871 Td (4214 uint off, inum;) 96.1073 Tj 0 -170.8805 Td (4215 struct buf *bp;) 96.1073 Tj 0 -180.3739 Td (4216 struct dirent *de;) 109.2129 Tj 0 -189.8672 Td (4217 ) 21.8426 Tj 0 -199.3606 Td (4218 if$dp->type != T_DIR$) 122.3184 Tj 0 -208.8539 Td (4219 panic$"dirlookup not DIR"$;) 157.2665 Tj 0 -218.3473 Td (4220 ) 21.8426 Tj 0 -227.8407 Td (4221 for$off = 0; off < dp->size; off += BSIZE${) 218.4257 Tj 0 -237.334 Td (4222 bp = bread$dp->dev, bmap\(dp, off / BSIZE$\);) 227.1628 Tj 0 -246.8274 Td (4223 for$de = \(struct dirent*$bp->data;) 187.8461 Tj 0 -256.3207 Td (4224 de < $struct dirent*$$bp->data + BSIZE$;) 231.5313 Tj 0 -265.8141 Td (4225 de++\){) 83.0018 Tj 0 -275.3075 Td (4226 if$de->inum == 0$) 122.3184 Tj 0 -284.8008 Td (4227 continue;) 96.1073 Tj 0 -294.2942 Td (4228 if$namecmp\(name, de->name$ == 0\){) 192.2146 Tj 0 -303.7875 Td (4229 // entry matches path element) 183.4776 Tj 0 -313.2809 Td (4230 if$poff$) 91.7388 Tj 0 -322.7743 Td (4231 *poff = off + $uchar*$de - bp->data;) 222.7942 Tj 0 -332.2676 Td (4232 inum = de->inum;) 126.6869 Tj 0 -341.761 Td (4233 brelse$bp$;) 104.8443 Tj 0 -351.2543 Td (4234 return iget$dp->dev, inum$;) 174.7406 Tj 0 -360.7477 Td (4235 }) 52.4222 Tj 0 -370.2411 Td (4236 }) 43.6851 Tj 0 -379.7344 Td (4237 brelse$bp$;) 87.3703 Tj 0 -389.2278 Td (4238 }) 34.9481 Tj 0 -398.7211 Td (4239 return 0;) 69.8962 Tj 0 -408.2145 Td (4240 }) 26.2111 Tj 0 -417.7079 Td (4241 ) 21.8426 Tj 0 -427.2012 Td (4242 ) 21.8426 Tj 0 -436.6946 Td (4243 ) 21.8426 Tj 0 -446.1879 Td (4244 ) 21.8426 Tj 0 -455.6813 Td (4245 ) 21.8426 Tj 0 -465.1747 Td (4246 ) 21.8426 Tj 0 -474.668 Td (4247 ) 21.8426 Tj 0 -484.1614 Td (4248 ) 21.8426 Tj 0 -493.6547 Td (4249 ) 21.8426 Tj 0 -522.1348 Td (Sheet 42) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/fs.c Page 13) 157.2665 Tj 0 -28.4801 Td (4250 // Write a new directory entry $name, inum$ into the dir\ ectory dp.) 310.1645 Tj 0 -37.9735 Td (4251 int) 34.9481 Tj 0 -47.4668 Td (4252 dirlink$struct inode *dp, char *name, uint inum$) 231.5313 Tj 0 -56.9602 Td (4253 {) 26.2111 Tj 0 -66.4535 Td (4254 int off;) 65.5277 Tj 0 -75.9469 Td (4255 struct dirent de;) 104.8443 Tj 0 -85.4403 Td (4256 struct inode *ip;) 104.8443 Tj 0 -94.9336 Td (4257 ) 21.8426 Tj 0 -104.427 Td (4258 // Check that name is not present.) 179.1091 Tj 0 -113.9203 Td (4259 if$\(ip = dirlookup\(dp, name, 0$\) != 0\){) 200.9517 Tj 0 -123.4137 Td (4260 iput$ip$;) 78.6333 Tj 0 -132.9071 Td (4261 return -1;) 83.0018 Tj 0 -142.4004 Td (4262 }) 34.9481 Tj 0 -151.8938 Td (4263 ) 21.8426 Tj 0 -161.3871 Td (4264 // Look for an empty dirent.) 152.898 Tj 0 -170.8805 Td (4265 for$off = 0; off < dp->size; off += sizeof\(de$\){) 240.2683 Tj 0 -180.3739 Td (4266 if$readi\(dp, \(char*$&de, off, sizeof$de$\) != si\ zeof$de$\)) 283.9534 Tj 0 -189.8672 Td (4267 panic$"dirlink read"$;) 144.161 Tj 0 -199.3606 Td (4268 if$de.inum == 0$) 109.2129 Tj 0 -208.8539 Td (4269 break;) 74.2647 Tj 0 -218.3473 Td (4270 }) 34.9481 Tj 0 -227.8407 Td (4271 ) 21.8426 Tj 0 -237.334 Td (4272 strncpy$de.name, name, DIRSIZ$;) 166.0035 Tj 0 -246.8274 Td (4273 de.inum = inum;) 96.1073 Tj 0 -256.3207 Td (4274 if$writei\(dp, \(char*$&de, off, sizeof$de$\) != siz\ eof$de$\)) 279.5849 Tj 0 -265.8141 Td (4275 panic$"dirlink"$;) 113.5814 Tj 0 -275.3075 Td (4276 ) 21.8426 Tj 0 -284.8008 Td (4277 return 0;) 69.8962 Tj 0 -294.2942 Td (4278 }) 26.2111 Tj 0 -303.7875 Td (4279 ) 21.8426 Tj 0 -313.2809 Td (4280 ) 21.8426 Tj 0 -322.7743 Td (4281 ) 21.8426 Tj 0 -332.2676 Td (4282 ) 21.8426 Tj 0 -341.761 Td (4283 ) 21.8426 Tj 0 -351.2543 Td (4284 ) 21.8426 Tj 0 -360.7477 Td (4285 ) 21.8426 Tj 0 -370.2411 Td (4286 ) 21.8426 Tj 0 -379.7344 Td (4287 ) 21.8426 Tj 0 -389.2278 Td (4288 ) 21.8426 Tj 0 -398.7211 Td (4289 ) 21.8426 Tj 0 -408.2145 Td (4290 ) 21.8426 Tj 0 -417.7079 Td (4291 ) 21.8426 Tj 0 -427.2012 Td (4292 ) 21.8426 Tj 0 -436.6946 Td (4293 ) 21.8426 Tj 0 -446.1879 Td (4294 ) 21.8426 Tj 0 -455.6813 Td (4295 ) 21.8426 Tj 0 -465.1747 Td (4296 ) 21.8426 Tj 0 -474.668 Td (4297 ) 21.8426 Tj 0 -484.1614 Td (4298 ) 21.8426 Tj 0 -493.6547 Td (4299 ) 21.8426 Tj 0 -522.1348 Td (Sheet 42) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 50 50 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/fs.c Page 14) 157.2665 Tj 0 -28.4801 Td (4300 // Paths) 56.7907 Tj 0 -37.9735 Td (4301 ) 21.8426 Tj 0 -47.4668 Td (4302 // Copy the next path element from path into name.) 240.2683 Tj 0 -56.9602 Td (4303 // Return a pointer to the element following the copied on\ e.) 283.9534 Tj 0 -66.4535 Td (4304 // The returned path has no leading slashes,) 214.0572 Tj 0 -75.9469 Td (4305 // so the caller can check *path=='\\0' to see if the name\ is the last one.) 345.1126 Tj 0 -85.4403 Td (4306 // If no name to remove, return 0.) 170.3721 Tj 0 -94.9336 Td (4307 //) 30.5796 Tj 0 -104.427 Td (4308 // Examples:) 74.2647 Tj 0 -113.9203 Td (4309 // skipelem$"a/bb/c", name$ = "bb/c", setting name = "\ a") 275.2164 Tj 0 -123.4137 Td (4310 // skipelem$"///a//bb", name$ = "bb", setting name = "\ a") 275.2164 Tj 0 -132.9071 Td (4311 // skipelem$"a", name$ = "", setting name = "a") 235.8998 Tj 0 -142.4004 Td (4312 // skipelem$"", name$ = skipelem$"////", name$ = 0) 249.0053 Tj 0 -151.8938 Td (4313 //) 30.5796 Tj 0 -161.3871 Td (4314 static char*) 74.2647 Tj 0 -170.8805 Td (4315 skipelem$char *path, char *name$) 161.635 Tj 0 -180.3739 Td (4316 {) 26.2111 Tj 0 -189.8672 Td (4317 char *s;) 65.5277 Tj 0 -199.3606 Td (4318 int len;) 65.5277 Tj 0 -208.8539 Td (4319 ) 21.8426 Tj 0 -218.3473 Td (4320 while$*path == '/'$) 113.5814 Tj 0 -227.8407 Td (4321 path++;) 69.8962 Tj 0 -237.334 Td (4322 if$*path == 0$) 91.7388 Tj 0 -246.8274 Td (4323 return 0;) 78.6333 Tj 0 -256.3207 Td (4324 s = path;) 69.8962 Tj 0 -265.8141 Td (4325 while$*path != '/' && *path != 0$) 174.7406 Tj 0 -275.3075 Td (4326 path++;) 69.8962 Tj 0 -284.8008 Td (4327 len = path - s;) 96.1073 Tj 0 -294.2942 Td (4328 if$len >= DIRSIZ$) 104.8443 Tj 0 -303.7875 Td (4329 memmove$name, s, DIRSIZ$;) 148.5295 Tj 0 -313.2809 Td (4330 else {) 56.7907 Tj 0 -322.7743 Td (4331 memmove$name, s, len$;) 135.4239 Tj 0 -332.2676 Td (4332 name[len] = 0;) 100.4758 Tj 0 -341.761 Td (4333 }) 34.9481 Tj 0 -351.2543 Td (4334 while$*path == '/'$) 113.5814 Tj 0 -360.7477 Td (4335 path++;) 69.8962 Tj 0 -370.2411 Td (4336 return path;) 83.0018 Tj 0 -379.7344 Td (4337 }) 26.2111 Tj 0 -389.2278 Td (4338 ) 21.8426 Tj 0 -398.7211 Td (4339 ) 21.8426 Tj 0 -408.2145 Td (4340 ) 21.8426 Tj 0 -417.7079 Td (4341 ) 21.8426 Tj 0 -427.2012 Td (4342 ) 21.8426 Tj 0 -436.6946 Td (4343 ) 21.8426 Tj 0 -446.1879 Td (4344 ) 21.8426 Tj 0 -455.6813 Td (4345 ) 21.8426 Tj 0 -465.1747 Td (4346 ) 21.8426 Tj 0 -474.668 Td (4347 ) 21.8426 Tj 0 -484.1614 Td (4348 ) 21.8426 Tj 0 -493.6547 Td (4349 ) 21.8426 Tj 0 -522.1348 Td (Sheet 43) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/fs.c Page 15) 157.2665 Tj 0 -28.4801 Td (4350 // Look up and return the inode for a path name.) 231.5313 Tj 0 -37.9735 Td (4351 // If parent != 0, return the inode for the parent and cop\ y the final) 323.2701 Tj 0 -47.4668 Td (4352 // path element into name, which must have room for DIRSIZ\ bytes.) 305.796 Tj 0 -56.9602 Td (4353 static struct inode*) 109.2129 Tj 0 -66.4535 Td (4354 namex$char *path, int nameiparent, char *name$) 222.7942 Tj 0 -75.9469 Td (4355 {) 26.2111 Tj 0 -85.4403 Td (4356 struct inode *ip, *next;) 135.4239 Tj 0 -94.9336 Td (4357 ) 21.8426 Tj 0 -104.427 Td (4358 if$*path == '/'$) 100.4758 Tj 0 -113.9203 Td (4359 ip = iget$ROOTDEV, ROOTINO$;) 161.635 Tj 0 -123.4137 Td (4360 else) 48.0537 Tj 0 -132.9071 Td (4361 ip = idup$proc->cwd$;) 131.0554 Tj 0 -142.4004 Td (4362 ) 21.8426 Tj 0 -151.8938 Td (4363 while$\(path = skipelem\(path, name$\) != 0\){) 214.0572 Tj 0 -161.3871 Td (4364 ilock$ip$;) 83.0018 Tj 0 -170.8805 Td (4365 if$ip->type != T_DIR${) 135.4239 Tj 0 -180.3739 Td (4366 iunlockput$ip$;) 113.5814 Tj 0 -189.8672 Td (4367 return 0;) 87.3703 Tj 0 -199.3606 Td (4368 }) 43.6851 Tj 0 -208.8539 Td (4369 if$nameiparent && *path == '\\0'${) 183.4776 Tj 0 -218.3473 Td (4370 // Stop one level early.) 152.898 Tj 0 -227.8407 Td (4371 iunlock$ip$;) 100.4758 Tj 0 -237.334 Td (4372 return ip;) 91.7388 Tj 0 -246.8274 Td (4373 }) 43.6851 Tj 0 -256.3207 Td (4374 if$\(next = dirlookup\(ip, name, 0$\) == 0\){) 218.4257 Tj 0 -265.8141 Td (4375 iunlockput$ip$;) 113.5814 Tj 0 -275.3075 Td (4376 return 0;) 87.3703 Tj 0 -284.8008 Td (4377 }) 43.6851 Tj 0 -294.2942 Td (4378 iunlockput$ip$;) 104.8443 Tj 0 -303.7875 Td (4379 ip = next;) 83.0018 Tj 0 -313.2809 Td (4380 }) 34.9481 Tj 0 -322.7743 Td (4381 if$nameiparent${) 100.4758 Tj 0 -332.2676 Td (4382 iput$ip$;) 78.6333 Tj 0 -341.761 Td (4383 return 0;) 78.6333 Tj 0 -351.2543 Td (4384 }) 34.9481 Tj 0 -360.7477 Td (4385 return ip;) 74.2647 Tj 0 -370.2411 Td (4386 }) 26.2111 Tj 0 -379.7344 Td (4387 ) 21.8426 Tj 0 -389.2278 Td (4388 struct inode*) 78.6333 Tj 0 -398.7211 Td (4389 namei$char *path$) 96.1073 Tj 0 -408.2145 Td (4390 {) 26.2111 Tj 0 -417.7079 Td (4391 char name[DIRSIZ];) 109.2129 Tj 0 -427.2012 Td (4392 return namex$path, 0, name$;) 152.898 Tj 0 -436.6946 Td (4393 }) 26.2111 Tj 0 -446.1879 Td (4394 ) 21.8426 Tj 0 -455.6813 Td (4395 struct inode*) 78.6333 Tj 0 -465.1747 Td (4396 nameiparent$char *path, char *name$) 174.7406 Tj 0 -474.668 Td (4397 {) 26.2111 Tj 0 -484.1614 Td (4398 return namex$path, 1, name$;) 152.898 Tj 0 -493.6547 Td (4399 }) 26.2111 Tj 0 -522.1348 Td (Sheet 43) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 51 51 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/file.c Page 1) 161.635 Tj 0 -28.4801 Td (4400 #include "types.h") 100.4758 Tj 0 -37.9735 Td (4401 #include "defs.h") 96.1073 Tj 0 -47.4668 Td (4402 #include "param.h") 100.4758 Tj 0 -56.9602 Td (4403 #include "fs.h") 87.3703 Tj 0 -66.4535 Td (4404 #include "file.h") 96.1073 Tj 0 -75.9469 Td (4405 #include "spinlock.h") 113.5814 Tj 0 -85.4403 Td (4406 ) 21.8426 Tj 0 -94.9336 Td (4407 struct devsw devsw[NDEV];) 131.0554 Tj 0 -104.427 Td (4408 struct {) 56.7907 Tj 0 -113.9203 Td (4409 struct spinlock lock;) 122.3184 Tj 0 -123.4137 Td (4410 struct file file[NFILE];) 135.4239 Tj 0 -132.9071 Td (4411 } ftable;) 61.1592 Tj 0 -142.4004 Td (4412 ) 21.8426 Tj 0 -151.8938 Td (4413 void) 39.3166 Tj 0 -161.3871 Td (4414 fileinit$void$) 83.0018 Tj 0 -170.8805 Td (4415 {) 26.2111 Tj 0 -180.3739 Td (4416 initlock$&ftable.lock, "ftable"$;) 174.7406 Tj 0 -189.8672 Td (4417 }) 26.2111 Tj 0 -199.3606 Td (4418 ) 21.8426 Tj 0 -208.8539 Td (4419 // Allocate a file structure.) 148.5295 Tj 0 -218.3473 Td (4420 struct file*) 74.2647 Tj 0 -227.8407 Td (4421 filealloc$void$) 87.3703 Tj 0 -237.334 Td (4422 {) 26.2111 Tj 0 -246.8274 Td (4423 struct file *f;) 96.1073 Tj 0 -256.3207 Td (4424 ) 21.8426 Tj 0 -265.8141 Td (4425 acquire$&ftable.lock$;) 126.6869 Tj 0 -275.3075 Td (4426 for$f = ftable.file; f < ftable.file + NFILE; f++${) 253.3738 Tj 0 -284.8008 Td (4427 if$f->ref == 0${) 109.2129 Tj 0 -294.2942 Td (4428 f->ref = 1;) 96.1073 Tj 0 -303.7875 Td (4429 release$&ftable.lock$;) 144.161 Tj 0 -313.2809 Td (4430 return f;) 87.3703 Tj 0 -322.7743 Td (4431 }) 43.6851 Tj 0 -332.2676 Td (4432 }) 34.9481 Tj 0 -341.761 Td (4433 release$&ftable.lock$;) 126.6869 Tj 0 -351.2543 Td (4434 return 0;) 69.8962 Tj 0 -360.7477 Td (4435 }) 26.2111 Tj 0 -370.2411 Td (4436 ) 21.8426 Tj 0 -379.7344 Td (4437 // Increment ref count for file f.) 170.3721 Tj 0 -389.2278 Td (4438 struct file*) 74.2647 Tj 0 -398.7211 Td (4439 filedup$struct file *f$) 122.3184 Tj 0 -408.2145 Td (4440 {) 26.2111 Tj 0 -417.7079 Td (4441 acquire$&ftable.lock$;) 126.6869 Tj 0 -427.2012 Td (4442 if$f->ref < 1$) 91.7388 Tj 0 -436.6946 Td (4443 panic$"filedup"$;) 113.5814 Tj 0 -446.1879 Td (4444 f->ref++;) 69.8962 Tj 0 -455.6813 Td (4445 release$&ftable.lock$;) 126.6869 Tj 0 -465.1747 Td (4446 return f;) 69.8962 Tj 0 -474.668 Td (4447 }) 26.2111 Tj 0 -484.1614 Td (4448 ) 21.8426 Tj 0 -493.6547 Td (4449 ) 21.8426 Tj 0 -522.1348 Td (Sheet 44) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/file.c Page 2) 161.635 Tj 0 -28.4801 Td (4450 // Close file f. $Decrement ref count, close when reache\ s 0.$) 292.6905 Tj 0 -37.9735 Td (4451 void) 39.3166 Tj 0 -47.4668 Td (4452 fileclose$struct file *f$) 131.0554 Tj 0 -56.9602 Td (4453 {) 26.2111 Tj 0 -66.4535 Td (4454 struct file ff;) 96.1073 Tj 0 -75.9469 Td (4455 ) 21.8426 Tj 0 -85.4403 Td (4456 acquire$&ftable.lock$;) 126.6869 Tj 0 -94.9336 Td (4457 if$f->ref < 1$) 91.7388 Tj 0 -104.427 Td (4458 panic$"fileclose"$;) 122.3184 Tj 0 -113.9203 Td (4459 if$--f->ref > 0${) 104.8443 Tj 0 -123.4137 Td (4460 release$&ftable.lock$;) 135.4239 Tj 0 -132.9071 Td (4461 return;) 69.8962 Tj 0 -142.4004 Td (4462 }) 34.9481 Tj 0 -151.8938 Td (4463 ff = *f;) 65.5277 Tj 0 -161.3871 Td (4464 f->ref = 0;) 78.6333 Tj 0 -170.8805 Td (4465 f->type = FD_NONE;) 109.2129 Tj 0 -180.3739 Td (4466 release$&ftable.lock$;) 126.6869 Tj 0 -189.8672 Td (4467 ) 21.8426 Tj 0 -199.3606 Td (4468 if$ff.type == FD_PIPE$) 126.6869 Tj 0 -208.8539 Td (4469 pipeclose$ff.pipe, ff.writable$;) 179.1091 Tj 0 -218.3473 Td (4470 else if$ff.type == FD_INODE$) 152.898 Tj 0 -227.8407 Td (4471 iput$ff.ip$;) 91.7388 Tj 0 -237.334 Td (4472 }) 26.2111 Tj 0 -246.8274 Td (4473 ) 21.8426 Tj 0 -256.3207 Td (4474 // Get metadata about file f.) 148.5295 Tj 0 -265.8141 Td (4475 int) 34.9481 Tj 0 -275.3075 Td (4476 filestat$struct file *f, struct stat *st$) 200.9517 Tj 0 -284.8008 Td (4477 {) 26.2111 Tj 0 -294.2942 Td (4478 if$f->type == FD_INODE${) 135.4239 Tj 0 -303.7875 Td (4479 ilock$f->ip$;) 96.1073 Tj 0 -313.2809 Td (4480 stati$f->ip, st$;) 113.5814 Tj 0 -322.7743 Td (4481 iunlock$f->ip$;) 104.8443 Tj 0 -332.2676 Td (4482 return 0;) 78.6333 Tj 0 -341.761 Td (4483 }) 34.9481 Tj 0 -351.2543 Td (4484 return -1;) 74.2647 Tj 0 -360.7477 Td (4485 }) 26.2111 Tj 0 -370.2411 Td (4486 ) 21.8426 Tj 0 -379.7344 Td (4487 ) 21.8426 Tj 0 -389.2278 Td (4488 ) 21.8426 Tj 0 -398.7211 Td (4489 ) 21.8426 Tj 0 -408.2145 Td (4490 ) 21.8426 Tj 0 -417.7079 Td (4491 ) 21.8426 Tj 0 -427.2012 Td (4492 ) 21.8426 Tj 0 -436.6946 Td (4493 ) 21.8426 Tj 0 -446.1879 Td (4494 ) 21.8426 Tj 0 -455.6813 Td (4495 ) 21.8426 Tj 0 -465.1747 Td (4496 ) 21.8426 Tj 0 -474.668 Td (4497 ) 21.8426 Tj 0 -484.1614 Td (4498 ) 21.8426 Tj 0 -493.6547 Td (4499 ) 21.8426 Tj 0 -522.1348 Td (Sheet 44) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 52 52 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/file.c Page 3) 161.635 Tj 0 -28.4801 Td (4500 // Read from file f. Addr is kernel address.) 218.4257 Tj 0 -37.9735 Td (4501 int) 34.9481 Tj 0 -47.4668 Td (4502 fileread$struct file *f, char *addr, int n$) 209.6887 Tj 0 -56.9602 Td (4503 {) 26.2111 Tj 0 -66.4535 Td (4504 int r;) 56.7907 Tj 0 -75.9469 Td (4505 ) 21.8426 Tj 0 -85.4403 Td (4506 if$f->readable == 0$) 117.9499 Tj 0 -94.9336 Td (4507 return -1;) 83.0018 Tj 0 -104.427 Td (4508 if$f->type == FD_PIPE$) 126.6869 Tj 0 -113.9203 Td (4509 return piperead$f->pipe, addr, n$;) 187.8461 Tj 0 -123.4137 Td (4510 if$f->type == FD_INODE${) 135.4239 Tj 0 -132.9071 Td (4511 ilock$f->ip$;) 96.1073 Tj 0 -142.4004 Td (4512 if$\(r = readi\(f->ip, addr, f->off, n$\) > 0\)) 227.1628 Tj 0 -151.8938 Td (4513 f->off += r;) 100.4758 Tj 0 -161.3871 Td (4514 iunlock$f->ip$;) 104.8443 Tj 0 -170.8805 Td (4515 return r;) 78.6333 Tj 0 -180.3739 Td (4516 }) 34.9481 Tj 0 -189.8672 Td (4517 panic$"fileread"$;) 109.2129 Tj 0 -199.3606 Td (4518 }) 26.2111 Tj 0 -208.8539 Td (4519 ) 21.8426 Tj 0 -218.3473 Td (4520 // Write to file f. Addr is kernel address.) 214.0572 Tj 0 -227.8407 Td (4521 int) 34.9481 Tj 0 -237.334 Td (4522 filewrite$struct file *f, char *addr, int n$) 214.0572 Tj 0 -246.8274 Td (4523 {) 26.2111 Tj 0 -256.3207 Td (4524 int r;) 56.7907 Tj 0 -265.8141 Td (4525 ) 21.8426 Tj 0 -275.3075 Td (4526 if$f->writable == 0$) 117.9499 Tj 0 -284.8008 Td (4527 return -1;) 83.0018 Tj 0 -294.2942 Td (4528 if$f->type == FD_PIPE$) 126.6869 Tj 0 -303.7875 Td (4529 return pipewrite$f->pipe, addr, n$;) 192.2146 Tj 0 -313.2809 Td (4530 if$f->type == FD_INODE${) 135.4239 Tj 0 -322.7743 Td (4531 ilock$f->ip$;) 96.1073 Tj 0 -332.2676 Td (4532 if$\(r = writei\(f->ip, addr, f->off, n$\) > 0\)) 231.5313 Tj 0 -341.761 Td (4533 f->off += r;) 100.4758 Tj 0 -351.2543 Td (4534 iunlock$f->ip$;) 104.8443 Tj 0 -360.7477 Td (4535 return r;) 78.6333 Tj 0 -370.2411 Td (4536 }) 34.9481 Tj 0 -379.7344 Td (4537 panic$"filewrite"$;) 113.5814 Tj 0 -389.2278 Td (4538 }) 26.2111 Tj 0 -398.7211 Td (4539 ) 21.8426 Tj 0 -408.2145 Td (4540 ) 21.8426 Tj 0 -417.7079 Td (4541 ) 21.8426 Tj 0 -427.2012 Td (4542 ) 21.8426 Tj 0 -436.6946 Td (4543 ) 21.8426 Tj 0 -446.1879 Td (4544 ) 21.8426 Tj 0 -455.6813 Td (4545 ) 21.8426 Tj 0 -465.1747 Td (4546 ) 21.8426 Tj 0 -474.668 Td (4547 ) 21.8426 Tj 0 -484.1614 Td (4548 ) 21.8426 Tj 0 -493.6547 Td (4549 ) 21.8426 Tj 0 -522.1348 Td (Sheet 45) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/sysfile.c Page 1) 174.7406 Tj 0 -28.4801 Td (4550 #include "types.h") 100.4758 Tj 0 -37.9735 Td (4551 #include "defs.h") 96.1073 Tj 0 -47.4668 Td (4552 #include "param.h") 100.4758 Tj 0 -56.9602 Td (4553 #include "stat.h") 96.1073 Tj 0 -66.4535 Td (4554 #include "mmu.h") 91.7388 Tj 0 -75.9469 Td (4555 #include "proc.h") 96.1073 Tj 0 -85.4403 Td (4556 #include "fs.h") 87.3703 Tj 0 -94.9336 Td (4557 #include "file.h") 96.1073 Tj 0 -104.427 Td (4558 #include "fcntl.h") 100.4758 Tj 0 -113.9203 Td (4559 ) 21.8426 Tj 0 -123.4137 Td (4560 // Fetch the nth word-sized system call argument as a file\ descriptor) 323.2701 Tj 0 -132.9071 Td (4561 // and return both the descriptor and the corresponding st\ ruct file.) 318.9016 Tj 0 -142.4004 Td (4562 static int) 65.5277 Tj 0 -151.8938 Td (4563 argfd$int n, int *pfd, struct file **pf$) 196.5831 Tj 0 -161.3871 Td (4564 {) 26.2111 Tj 0 -170.8805 Td (4565 int fd;) 61.1592 Tj 0 -180.3739 Td (4566 struct file *f;) 96.1073 Tj 0 -189.8672 Td (4567 ) 21.8426 Tj 0 -199.3606 Td (4568 if$argint\(n, &fd$ < 0\)) 126.6869 Tj 0 -208.8539 Td (4569 return -1;) 83.0018 Tj 0 -218.3473 Td (4570 if$fd < 0 || fd >= NOFILE || \(f=proc->ofile[fd]$ == 0\ \)) 266.4794 Tj 0 -227.8407 Td (4571 return -1;) 83.0018 Tj 0 -237.334 Td (4572 if$pfd$) 61.1592 Tj 0 -246.8274 Td (4573 *pfd = fd;) 83.0018 Tj 0 -256.3207 Td (4574 if$pf$) 56.7907 Tj 0 -265.8141 Td (4575 *pf = f;) 74.2647 Tj 0 -275.3075 Td (4576 return 0;) 69.8962 Tj 0 -284.8008 Td (4577 }) 26.2111 Tj 0 -294.2942 Td (4578 ) 21.8426 Tj 0 -303.7875 Td (4579 // Allocate a file descriptor for the given file.) 235.8998 Tj 0 -313.2809 Td (4580 // Takes over file reference from caller on success.) 249.0053 Tj 0 -322.7743 Td (4581 static int) 65.5277 Tj 0 -332.2676 Td (4582 fdalloc$struct file *f$) 122.3184 Tj 0 -341.761 Td (4583 {) 26.2111 Tj 0 -351.2543 Td (4584 int fd;) 61.1592 Tj 0 -360.7477 Td (4585 ) 21.8426 Tj 0 -370.2411 Td (4586 for$fd = 0; fd < NOFILE; fd++${) 166.0035 Tj 0 -379.7344 Td (4587 if$proc->ofile[fd] == 0${) 148.5295 Tj 0 -389.2278 Td (4588 proc->ofile[fd] = f;) 135.4239 Tj 0 -398.7211 Td (4589 return fd;) 91.7388 Tj 0 -408.2145 Td (4590 }) 43.6851 Tj 0 -417.7079 Td (4591 }) 34.9481 Tj 0 -427.2012 Td (4592 return -1;) 74.2647 Tj 0 -436.6946 Td (4593 }) 26.2111 Tj 0 -446.1879 Td (4594 ) 21.8426 Tj 0 -455.6813 Td (4595 ) 21.8426 Tj 0 -465.1747 Td (4596 ) 21.8426 Tj 0 -474.668 Td (4597 ) 21.8426 Tj 0 -484.1614 Td (4598 ) 21.8426 Tj 0 -493.6547 Td (4599 ) 21.8426 Tj 0 -522.1348 Td (Sheet 45) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 53 53 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/sysfile.c Page 2) 174.7406 Tj 0 -28.4801 Td (4600 int) 34.9481 Tj 0 -37.9735 Td (4601 sys_dup$void$) 78.6333 Tj 0 -47.4668 Td (4602 {) 26.2111 Tj 0 -56.9602 Td (4603 struct file *f;) 96.1073 Tj 0 -66.4535 Td (4604 int fd;) 61.1592 Tj 0 -75.9469 Td (4605 ) 21.8426 Tj 0 -85.4403 Td (4606 if$argfd\(0, 0, &f$ < 0\)) 131.0554 Tj 0 -94.9336 Td (4607 return -1;) 83.0018 Tj 0 -104.427 Td (4608 if$\(fd=fdalloc\(f$\) < 0\)) 131.0554 Tj 0 -113.9203 Td (4609 return -1;) 83.0018 Tj 0 -123.4137 Td (4610 filedup$f$;) 78.6333 Tj 0 -132.9071 Td (4611 return fd;) 74.2647 Tj 0 -142.4004 Td (4612 }) 26.2111 Tj 0 -151.8938 Td (4613 ) 21.8426 Tj 0 -161.3871 Td (4614 int) 34.9481 Tj 0 -170.8805 Td (4615 sys_read$void$) 83.0018 Tj 0 -180.3739 Td (4616 {) 26.2111 Tj 0 -189.8672 Td (4617 struct file *f;) 96.1073 Tj 0 -199.3606 Td (4618 int n;) 56.7907 Tj 0 -208.8539 Td (4619 char *p;) 65.5277 Tj 0 -218.3473 Td (4620 ) 21.8426 Tj 0 -227.8407 Td (4621 if$argfd\(0, 0, &f$ < 0 || argint$2, &n$ < 0 || argp\ tr$1, &p, n$ < 0\)) 327.6386 Tj 0 -237.334 Td (4622 return -1;) 83.0018 Tj 0 -246.8274 Td (4623 return fileread$f, p, n$;) 139.7925 Tj 0 -256.3207 Td (4624 }) 26.2111 Tj 0 -265.8141 Td (4625 ) 21.8426 Tj 0 -275.3075 Td (4626 int) 34.9481 Tj 0 -284.8008 Td (4627 sys_write$void$) 87.3703 Tj 0 -294.2942 Td (4628 {) 26.2111 Tj 0 -303.7875 Td (4629 struct file *f;) 96.1073 Tj 0 -313.2809 Td (4630 int n;) 56.7907 Tj 0 -322.7743 Td (4631 char *p;) 65.5277 Tj 0 -332.2676 Td (4632 ) 21.8426 Tj 0 -341.761 Td (4633 if$argfd\(0, 0, &f$ < 0 || argint$2, &n$ < 0 || argp\ tr$1, &p, n$ < 0\)) 327.6386 Tj 0 -351.2543 Td (4634 return -1;) 83.0018 Tj 0 -360.7477 Td (4635 return filewrite$f, p, n$;) 144.161 Tj 0 -370.2411 Td (4636 }) 26.2111 Tj 0 -379.7344 Td (4637 ) 21.8426 Tj 0 -389.2278 Td (4638 int) 34.9481 Tj 0 -398.7211 Td (4639 sys_close$void$) 87.3703 Tj 0 -408.2145 Td (4640 {) 26.2111 Tj 0 -417.7079 Td (4641 int fd;) 61.1592 Tj 0 -427.2012 Td (4642 struct file *f;) 96.1073 Tj 0 -436.6946 Td (4643 ) 21.8426 Tj 0 -446.1879 Td (4644 if$argfd\(0, &fd, &f$ < 0\)) 139.7925 Tj 0 -455.6813 Td (4645 return -1;) 83.0018 Tj 0 -465.1747 Td (4646 proc->ofile[fd] = 0;) 117.9499 Tj 0 -474.668 Td (4647 fileclose$f$;) 87.3703 Tj 0 -484.1614 Td (4648 return 0;) 69.8962 Tj 0 -493.6547 Td (4649 }) 26.2111 Tj 0 -522.1348 Td (Sheet 46) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/sysfile.c Page 3) 174.7406 Tj 0 -28.4801 Td (4650 int) 34.9481 Tj 0 -37.9735 Td (4651 sys_fstat$void$) 87.3703 Tj 0 -47.4668 Td (4652 {) 26.2111 Tj 0 -56.9602 Td (4653 struct file *f;) 96.1073 Tj 0 -66.4535 Td (4654 struct stat *st;) 100.4758 Tj 0 -75.9469 Td (4655 ) 21.8426 Tj 0 -85.4403 Td (4656 if$argfd\(0, 0, &f$ < 0 || argptr$1, \(void*$&st, si\ zeof$*st$\) < 0\)) 314.533 Tj 0 -94.9336 Td (4657 return -1;) 83.0018 Tj 0 -104.427 Td (4658 return filestat$f, st$;) 131.0554 Tj 0 -113.9203 Td (4659 }) 26.2111 Tj 0 -123.4137 Td (4660 ) 21.8426 Tj 0 -132.9071 Td (4661 // Create the path new as a link to the same inode as old.) 275.2164 Tj 0 -142.4004 Td (4662 int) 34.9481 Tj 0 -151.8938 Td (4663 sys_link$void$) 83.0018 Tj 0 -161.3871 Td (4664 {) 26.2111 Tj 0 -170.8805 Td (4665 char name[DIRSIZ], *new, *old;) 161.635 Tj 0 -180.3739 Td (4666 struct inode *dp, *ip;) 126.6869 Tj 0 -189.8672 Td (4667 ) 21.8426 Tj 0 -199.3606 Td (4668 if$argstr\(0, &old$ < 0 || argstr$1, &new$ < 0\)) 231.5313 Tj 0 -208.8539 Td (4669 return -1;) 83.0018 Tj 0 -218.3473 Td (4670 if$\(ip = namei\(old$\) == 0\)) 144.161 Tj 0 -227.8407 Td (4671 return -1;) 83.0018 Tj 0 -237.334 Td (4672 ilock$ip$;) 74.2647 Tj 0 -246.8274 Td (4673 if$ip->type == T_DIR${) 126.6869 Tj 0 -256.3207 Td (4674 iunlockput$ip$;) 104.8443 Tj 0 -265.8141 Td (4675 return -1;) 83.0018 Tj 0 -275.3075 Td (4676 }) 34.9481 Tj 0 -284.8008 Td (4677 ip->nlink++;) 83.0018 Tj 0 -294.2942 Td (4678 iupdate$ip$;) 83.0018 Tj 0 -303.7875 Td (4679 iunlock$ip$;) 83.0018 Tj 0 -313.2809 Td (4680 ) 21.8426 Tj 0 -322.7743 Td (4681 if$\(dp = nameiparent\(new, name$\) == 0\)) 196.5831 Tj 0 -332.2676 Td (4682 goto bad;) 78.6333 Tj 0 -341.761 Td (4683 ilock$dp$;) 74.2647 Tj 0 -351.2543 Td (4684 if$dp->dev != ip->dev || dirlink\(dp, name, ip->inum$ \ < 0\){) 283.9534 Tj 0 -360.7477 Td (4685 iunlockput$dp$;) 104.8443 Tj 0 -370.2411 Td (4686 goto bad;) 78.6333 Tj 0 -379.7344 Td (4687 }) 34.9481 Tj 0 -389.2278 Td (4688 iunlockput$dp$;) 96.1073 Tj 0 -398.7211 Td (4689 iput$ip$;) 69.8962 Tj 0 -408.2145 Td (4690 return 0;) 69.8962 Tj 0 -417.7079 Td (4691 ) 21.8426 Tj 0 -427.2012 Td (4692 bad:) 39.3166 Tj 0 -436.6946 Td (4693 ilock$ip$;) 74.2647 Tj 0 -446.1879 Td (4694 ip->nlink--;) 83.0018 Tj 0 -455.6813 Td (4695 iupdate$ip$;) 83.0018 Tj 0 -465.1747 Td (4696 iunlockput$ip$;) 96.1073 Tj 0 -474.668 Td (4697 return -1;) 74.2647 Tj 0 -484.1614 Td (4698 }) 26.2111 Tj 0 -493.6547 Td (4699 ) 21.8426 Tj 0 -522.1348 Td (Sheet 46) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 54 54 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/sysfile.c Page 4) 174.7406 Tj 0 -28.4801 Td (4700 // Is the directory dp empty except for "." and ".." ?) 257.7424 Tj 0 -37.9735 Td (4701 static int) 65.5277 Tj 0 -47.4668 Td (4702 isdirempty$struct inode *dp$) 144.161 Tj 0 -56.9602 Td (4703 {) 26.2111 Tj 0 -66.4535 Td (4704 int off;) 65.5277 Tj 0 -75.9469 Td (4705 struct dirent de;) 104.8443 Tj 0 -85.4403 Td (4706 ) 21.8426 Tj 0 -94.9336 Td (4707 for$off=2*sizeof\(de$; offsize; off+=sizeof$de$\ \){) 262.1109 Tj 0 -104.427 Td (4708 if$readi\(dp, \(char*$&de, off, sizeof$de$\) != si\ zeof$de$\)) 283.9534 Tj 0 -113.9203 Td (4709 panic$"isdirempty: readi"$;) 166.0035 Tj 0 -123.4137 Td (4710 if$de.inum != 0$) 109.2129 Tj 0 -132.9071 Td (4711 return 0;) 87.3703 Tj 0 -142.4004 Td (4712 }) 34.9481 Tj 0 -151.8938 Td (4713 return 1;) 69.8962 Tj 0 -161.3871 Td (4714 }) 26.2111 Tj 0 -170.8805 Td (4715 ) 21.8426 Tj 0 -180.3739 Td (4716 ) 21.8426 Tj 0 -189.8672 Td (4717 ) 21.8426 Tj 0 -199.3606 Td (4718 ) 21.8426 Tj 0 -208.8539 Td (4719 ) 21.8426 Tj 0 -218.3473 Td (4720 ) 21.8426 Tj 0 -227.8407 Td (4721 ) 21.8426 Tj 0 -237.334 Td (4722 ) 21.8426 Tj 0 -246.8274 Td (4723 ) 21.8426 Tj 0 -256.3207 Td (4724 ) 21.8426 Tj 0 -265.8141 Td (4725 ) 21.8426 Tj 0 -275.3075 Td (4726 ) 21.8426 Tj 0 -284.8008 Td (4727 ) 21.8426 Tj 0 -294.2942 Td (4728 ) 21.8426 Tj 0 -303.7875 Td (4729 ) 21.8426 Tj 0 -313.2809 Td (4730 ) 21.8426 Tj 0 -322.7743 Td (4731 ) 21.8426 Tj 0 -332.2676 Td (4732 ) 21.8426 Tj 0 -341.761 Td (4733 ) 21.8426 Tj 0 -351.2543 Td (4734 ) 21.8426 Tj 0 -360.7477 Td (4735 ) 21.8426 Tj 0 -370.2411 Td (4736 ) 21.8426 Tj 0 -379.7344 Td (4737 ) 21.8426 Tj 0 -389.2278 Td (4738 ) 21.8426 Tj 0 -398.7211 Td (4739 ) 21.8426 Tj 0 -408.2145 Td (4740 ) 21.8426 Tj 0 -417.7079 Td (4741 ) 21.8426 Tj 0 -427.2012 Td (4742 ) 21.8426 Tj 0 -436.6946 Td (4743 ) 21.8426 Tj 0 -446.1879 Td (4744 ) 21.8426 Tj 0 -455.6813 Td (4745 ) 21.8426 Tj 0 -465.1747 Td (4746 ) 21.8426 Tj 0 -474.668 Td (4747 ) 21.8426 Tj 0 -484.1614 Td (4748 ) 21.8426 Tj 0 -493.6547 Td (4749 ) 21.8426 Tj 0 -522.1348 Td (Sheet 47) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/sysfile.c Page 5) 174.7406 Tj 0 -28.4801 Td (4750 int) 34.9481 Tj 0 -37.9735 Td (4751 sys_unlink$void$) 91.7388 Tj 0 -47.4668 Td (4752 {) 26.2111 Tj 0 -56.9602 Td (4753 struct inode *ip, *dp;) 126.6869 Tj 0 -66.4535 Td (4754 struct dirent de;) 104.8443 Tj 0 -75.9469 Td (4755 char name[DIRSIZ], *path;) 139.7925 Tj 0 -85.4403 Td (4756 uint off;) 69.8962 Tj 0 -94.9336 Td (4757 ) 21.8426 Tj 0 -104.427 Td (4758 if$argstr\(0, &path$ < 0\)) 135.4239 Tj 0 -113.9203 Td (4759 return -1;) 83.0018 Tj 0 -123.4137 Td (4760 if$\(dp = nameiparent\(path, name$\) == 0\)) 200.9517 Tj 0 -132.9071 Td (4761 return -1;) 83.0018 Tj 0 -142.4004 Td (4762 ilock$dp$;) 74.2647 Tj 0 -151.8938 Td (4763 ) 21.8426 Tj 0 -161.3871 Td (4764 // Cannot unlink "." or "..".) 157.2665 Tj 0 -170.8805 Td (4765 if$namecmp\(name, "."$ == 0 || namecmp$name, ".."$ =\ = 0\){) 275.2164 Tj 0 -180.3739 Td (4766 iunlockput$dp$;) 104.8443 Tj 0 -189.8672 Td (4767 return -1;) 83.0018 Tj 0 -199.3606 Td (4768 }) 34.9481 Tj 0 -208.8539 Td (4769 ) 21.8426 Tj 0 -218.3473 Td (4770 if$\(ip = dirlookup\(dp, name, &off$\) == 0\){) 214.0572 Tj 0 -227.8407 Td (4771 iunlockput$dp$;) 104.8443 Tj 0 -237.334 Td (4772 return -1;) 83.0018 Tj 0 -246.8274 Td (4773 }) 34.9481 Tj 0 -256.3207 Td (4774 ilock$ip$;) 74.2647 Tj 0 -265.8141 Td (4775 ) 21.8426 Tj 0 -275.3075 Td (4776 if$ip->nlink < 1$) 104.8443 Tj 0 -284.8008 Td (4777 panic$"unlink: nlink < 1"$;) 157.2665 Tj 0 -294.2942 Td (4778 if$ip->type == T_DIR && !isdirempty\(ip$\){) 209.6887 Tj 0 -303.7875 Td (4779 iunlockput$ip$;) 104.8443 Tj 0 -313.2809 Td (4780 iunlockput$dp$;) 104.8443 Tj 0 -322.7743 Td (4781 return -1;) 83.0018 Tj 0 -332.2676 Td (4782 }) 34.9481 Tj 0 -341.761 Td (4783 ) 21.8426 Tj 0 -351.2543 Td (4784 memset$&de, 0, sizeof\(de$\);) 148.5295 Tj 0 -360.7477 Td (4785 if$writei\(dp, \(char*$&de, off, sizeof$de$\) != siz\ eof$de$\)) 279.5849 Tj 0 -370.2411 Td (4786 panic$"unlink: writei"$;) 144.161 Tj 0 -379.7344 Td (4787 if$ip->type == T_DIR${) 126.6869 Tj 0 -389.2278 Td (4788 dp->nlink--;) 91.7388 Tj 0 -398.7211 Td (4789 iupdate$dp$;) 91.7388 Tj 0 -408.2145 Td (4790 }) 34.9481 Tj 0 -417.7079 Td (4791 iunlockput$dp$;) 96.1073 Tj 0 -427.2012 Td (4792 ) 21.8426 Tj 0 -436.6946 Td (4793 ip->nlink--;) 83.0018 Tj 0 -446.1879 Td (4794 iupdate$ip$;) 83.0018 Tj 0 -455.6813 Td (4795 iunlockput$ip$;) 96.1073 Tj 0 -465.1747 Td (4796 return 0;) 69.8962 Tj 0 -474.668 Td (4797 }) 26.2111 Tj 0 -484.1614 Td (4798 ) 21.8426 Tj 0 -493.6547 Td (4799 ) 21.8426 Tj 0 -522.1348 Td (Sheet 47) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 55 55 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/sysfile.c Page 6) 174.7406 Tj 0 -28.4801 Td (4800 static struct inode*) 109.2129 Tj 0 -37.9735 Td (4801 create$char *path, short type, short major, short minor$) 266.4794 Tj 0 -47.4668 Td (4802 {) 26.2111 Tj 0 -56.9602 Td (4803 uint off;) 69.8962 Tj 0 -66.4535 Td (4804 struct inode *ip, *dp;) 126.6869 Tj 0 -75.9469 Td (4805 char name[DIRSIZ];) 109.2129 Tj 0 -85.4403 Td (4806 ) 21.8426 Tj 0 -94.9336 Td (4807 if$\(dp = nameiparent\(path, name$\) == 0\)) 200.9517 Tj 0 -104.427 Td (4808 return 0;) 78.6333 Tj 0 -113.9203 Td (4809 ilock$dp$;) 74.2647 Tj 0 -123.4137 Td (4810 ) 21.8426 Tj 0 -132.9071 Td (4811 if$\(ip = dirlookup\(dp, name, &off$\) != 0\){) 214.0572 Tj 0 -142.4004 Td (4812 iunlockput$dp$;) 104.8443 Tj 0 -151.8938 Td (4813 ilock$ip$;) 83.0018 Tj 0 -161.3871 Td (4814 if$type == T_FILE && ip->type == T_FILE$) 214.0572 Tj 0 -170.8805 Td (4815 return ip;) 91.7388 Tj 0 -180.3739 Td (4816 iunlockput$ip$;) 104.8443 Tj 0 -189.8672 Td (4817 return 0;) 78.6333 Tj 0 -199.3606 Td (4818 }) 34.9481 Tj 0 -208.8539 Td (4819 ) 21.8426 Tj 0 -218.3473 Td (4820 if$\(ip = ialloc\(dp->dev, type$\) == 0\)) 192.2146 Tj 0 -227.8407 Td (4821 panic$"create: ialloc"$;) 144.161 Tj 0 -237.334 Td (4822 ) 21.8426 Tj 0 -246.8274 Td (4823 ilock$ip$;) 74.2647 Tj 0 -256.3207 Td (4824 ip->major = major;) 109.2129 Tj 0 -265.8141 Td (4825 ip->minor = minor;) 109.2129 Tj 0 -275.3075 Td (4826 ip->nlink = 1;) 91.7388 Tj 0 -284.8008 Td (4827 iupdate$ip$;) 83.0018 Tj 0 -294.2942 Td (4828 ) 21.8426 Tj 0 -303.7875 Td (4829 if$type == T_DIR${ // Create . and .. entries.) 235.8998 Tj 0 -313.2809 Td (4830 dp->nlink++; // for "..") 148.5295 Tj 0 -322.7743 Td (4831 iupdate$dp$;) 91.7388 Tj 0 -332.2676 Td (4832 // No ip->nlink++ for ".": avoid cyclic ref count.) 257.7424 Tj 0 -341.761 Td (4833 if$dirlink\(ip, ".", ip->inum$ < 0 || dirlink$ip, "\ ..", dp->inum$ < 0\)) 340.7441 Tj 0 -351.2543 Td (4834 panic$"create dots"$;) 139.7925 Tj 0 -360.7477 Td (4835 }) 34.9481 Tj 0 -370.2411 Td (4836 ) 21.8426 Tj 0 -379.7344 Td (4837 if$dirlink\(dp, name, ip->inum$ < 0\)) 183.4776 Tj 0 -389.2278 Td (4838 panic$"create: dirlink"$;) 148.5295 Tj 0 -398.7211 Td (4839 ) 21.8426 Tj 0 -408.2145 Td (4840 iunlockput$dp$;) 96.1073 Tj 0 -417.7079 Td (4841 return ip;) 74.2647 Tj 0 -427.2012 Td (4842 }) 26.2111 Tj 0 -436.6946 Td (4843 ) 21.8426 Tj 0 -446.1879 Td (4844 ) 21.8426 Tj 0 -455.6813 Td (4845 ) 21.8426 Tj 0 -465.1747 Td (4846 ) 21.8426 Tj 0 -474.668 Td (4847 ) 21.8426 Tj 0 -484.1614 Td (4848 ) 21.8426 Tj 0 -493.6547 Td (4849 ) 21.8426 Tj 0 -522.1348 Td (Sheet 48) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/sysfile.c Page 7) 174.7406 Tj 0 -28.4801 Td (4850 int) 34.9481 Tj 0 -37.9735 Td (4851 sys_open$void$) 83.0018 Tj 0 -47.4668 Td (4852 {) 26.2111 Tj 0 -56.9602 Td (4853 char *path;) 78.6333 Tj 0 -66.4535 Td (4854 int fd, omode;) 91.7388 Tj 0 -75.9469 Td (4855 struct file *f;) 96.1073 Tj 0 -85.4403 Td (4856 struct inode *ip;) 104.8443 Tj 0 -94.9336 Td (4857 ) 21.8426 Tj 0 -104.427 Td (4858 if$argstr\(0, &path$ < 0 || argint$1, &omode$ < 0\)) 244.6368 Tj 0 -113.9203 Td (4859 return -1;) 83.0018 Tj 0 -123.4137 Td (4860 ) 21.8426 Tj 0 -132.9071 Td (4861 if$omode & O_CREATE${) 122.3184 Tj 0 -142.4004 Td (4862 if$\(ip = create\(path, T_FILE, 0, 0$\) == 0\)) 222.7942 Tj 0 -151.8938 Td (4863 return -1;) 91.7388 Tj 0 -161.3871 Td (4864 } else {) 65.5277 Tj 0 -170.8805 Td (4865 if$\(ip = namei\(path$\) == 0\)) 157.2665 Tj 0 -180.3739 Td (4866 return -1;) 91.7388 Tj 0 -189.8672 Td (4867 ilock$ip$;) 83.0018 Tj 0 -199.3606 Td (4868 if$ip->type == T_DIR && omode != O_RDONLY${) 227.1628 Tj 0 -208.8539 Td (4869 iunlockput$ip$;) 113.5814 Tj 0 -218.3473 Td (4870 return -1;) 91.7388 Tj 0 -227.8407 Td (4871 }) 43.6851 Tj 0 -237.334 Td (4872 }) 34.9481 Tj 0 -246.8274 Td (4873 ) 21.8426 Tj 0 -256.3207 Td (4874 if$\(f = filealloc\($\) == 0 || $fd = fdalloc\(f$\) \ < 0\){) 257.7424 Tj 0 -265.8141 Td (4875 if$f$) 61.1592 Tj 0 -275.3075 Td (4876 fileclose$f$;) 104.8443 Tj 0 -284.8008 Td (4877 iunlockput$ip$;) 104.8443 Tj 0 -294.2942 Td (4878 return -1;) 83.0018 Tj 0 -303.7875 Td (4879 }) 34.9481 Tj 0 -313.2809 Td (4880 iunlock$ip$;) 83.0018 Tj 0 -322.7743 Td (4881 ) 21.8426 Tj 0 -332.2676 Td (4882 f->type = FD_INODE;) 113.5814 Tj 0 -341.761 Td (4883 f->ip = ip;) 78.6333 Tj 0 -351.2543 Td (4884 f->off = 0;) 78.6333 Tj 0 -360.7477 Td (4885 f->readable = !$omode & O_WRONLY$;) 179.1091 Tj 0 -370.2411 Td (4886 f->writable = $omode & O_WRONLY$ || $omode & O_RDWR$\ ;) 262.1109 Tj 0 -379.7344 Td (4887 ) 21.8426 Tj 0 -389.2278 Td (4888 return fd;) 74.2647 Tj 0 -398.7211 Td (4889 }) 26.2111 Tj 0 -408.2145 Td (4890 ) 21.8426 Tj 0 -417.7079 Td (4891 ) 21.8426 Tj 0 -427.2012 Td (4892 ) 21.8426 Tj 0 -436.6946 Td (4893 ) 21.8426 Tj 0 -446.1879 Td (4894 ) 21.8426 Tj 0 -455.6813 Td (4895 ) 21.8426 Tj 0 -465.1747 Td (4896 ) 21.8426 Tj 0 -474.668 Td (4897 ) 21.8426 Tj 0 -484.1614 Td (4898 ) 21.8426 Tj 0 -493.6547 Td (4899 ) 21.8426 Tj 0 -522.1348 Td (Sheet 48) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 56 56 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/sysfile.c Page 8) 174.7406 Tj 0 -28.4801 Td (4900 int) 34.9481 Tj 0 -37.9735 Td (4901 sys_mkdir$void$) 87.3703 Tj 0 -47.4668 Td (4902 {) 26.2111 Tj 0 -56.9602 Td (4903 char *path;) 78.6333 Tj 0 -66.4535 Td (4904 struct inode *ip;) 104.8443 Tj 0 -75.9469 Td (4905 ) 21.8426 Tj 0 -85.4403 Td (4906 if$argstr\(0, &path$ < 0 || $ip = create\(path, T_DIR\ , 0, 0$\) == 0\)) 314.533 Tj 0 -94.9336 Td (4907 return -1;) 83.0018 Tj 0 -104.427 Td (4908 iunlockput$ip$;) 96.1073 Tj 0 -113.9203 Td (4909 return 0;) 69.8962 Tj 0 -123.4137 Td (4910 }) 26.2111 Tj 0 -132.9071 Td (4911 ) 21.8426 Tj 0 -142.4004 Td (4912 int) 34.9481 Tj 0 -151.8938 Td (4913 sys_mknod$void$) 87.3703 Tj 0 -161.3871 Td (4914 {) 26.2111 Tj 0 -170.8805 Td (4915 struct inode *ip;) 104.8443 Tj 0 -180.3739 Td (4916 char *path;) 78.6333 Tj 0 -189.8672 Td (4917 int len;) 65.5277 Tj 0 -199.3606 Td (4918 int major, minor;) 104.8443 Tj 0 -208.8539 Td (4919 ) 21.8426 Tj 0 -218.3473 Td (4920 if$\(len=argstr\(0, &path$\) < 0 ||) 170.3721 Tj 0 -227.8407 Td (4921 argint$1, &major$ < 0 ||) 148.5295 Tj 0 -237.334 Td (4922 argint$2, &minor$ < 0 ||) 148.5295 Tj 0 -246.8274 Td (4923 $ip = create\(path, T_DEV, major, minor$\) == 0\)) 244.6368 Tj 0 -256.3207 Td (4924 return -1;) 83.0018 Tj 0 -265.8141 Td (4925 iunlockput$ip$;) 96.1073 Tj 0 -275.3075 Td (4926 return 0;) 69.8962 Tj 0 -284.8008 Td (4927 }) 26.2111 Tj 0 -294.2942 Td (4928 ) 21.8426 Tj 0 -303.7875 Td (4929 int) 34.9481 Tj 0 -313.2809 Td (4930 sys_chdir$void$) 87.3703 Tj 0 -322.7743 Td (4931 {) 26.2111 Tj 0 -332.2676 Td (4932 char *path;) 78.6333 Tj 0 -341.761 Td (4933 struct inode *ip;) 104.8443 Tj 0 -351.2543 Td (4934 ) 21.8426 Tj 0 -360.7477 Td (4935 if$argstr\(0, &path$ < 0 || $ip = namei\(path$\) == \ 0\)) 253.3738 Tj 0 -370.2411 Td (4936 return -1;) 83.0018 Tj 0 -379.7344 Td (4937 ilock$ip$;) 74.2647 Tj 0 -389.2278 Td (4938 if$ip->type != T_DIR${) 126.6869 Tj 0 -398.7211 Td (4939 iunlockput$ip$;) 104.8443 Tj 0 -408.2145 Td (4940 return -1;) 83.0018 Tj 0 -417.7079 Td (4941 }) 34.9481 Tj 0 -427.2012 Td (4942 iunlock$ip$;) 83.0018 Tj 0 -436.6946 Td (4943 iput$proc->cwd$;) 100.4758 Tj 0 -446.1879 Td (4944 proc->cwd = ip;) 96.1073 Tj 0 -455.6813 Td (4945 return 0;) 69.8962 Tj 0 -465.1747 Td (4946 }) 26.2111 Tj 0 -474.668 Td (4947 ) 21.8426 Tj 0 -484.1614 Td (4948 ) 21.8426 Tj 0 -493.6547 Td (4949 ) 21.8426 Tj 0 -522.1348 Td (Sheet 49) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/sysfile.c Page 9) 174.7406 Tj 0 -28.4801 Td (4950 int) 34.9481 Tj 0 -37.9735 Td (4951 sys_exec$void$) 83.0018 Tj 0 -47.4668 Td (4952 {) 26.2111 Tj 0 -56.9602 Td (4953 char *path, *argv[20];) 126.6869 Tj 0 -66.4535 Td (4954 int i;) 56.7907 Tj 0 -75.9469 Td (4955 uint uargv, uarg;) 104.8443 Tj 0 -85.4403 Td (4956 ) 21.8426 Tj 0 -94.9336 Td (4957 if$argstr\(0, &path$ < 0 || argint$1, \(int*$&uargv\)\ < 0\)) 270.8479 Tj 0 -104.427 Td (4958 return -1;) 83.0018 Tj 0 -113.9203 Td (4959 memset$argv, 0, sizeof\(argv$\);) 161.635 Tj 0 -123.4137 Td (4960 for$i=0;; i++${) 96.1073 Tj 0 -132.9071 Td (4961 if$i >= NELEM\(argv$\)) 126.6869 Tj 0 -142.4004 Td (4962 return -1;) 91.7388 Tj 0 -151.8938 Td (4963 if$fetchint\(proc, uargv+4*i, \(int*$&uarg\) < 0\)) 240.2683 Tj 0 -161.3871 Td (4964 return -1;) 91.7388 Tj 0 -170.8805 Td (4965 if$uarg == 0${) 100.4758 Tj 0 -180.3739 Td (4966 argv[i] = 0;) 100.4758 Tj 0 -189.8672 Td (4967 break;) 74.2647 Tj 0 -199.3606 Td (4968 }) 43.6851 Tj 0 -208.8539 Td (4969 if$fetchstr\(proc, uarg, &argv[i]$ < 0\)) 205.3202 Tj 0 -218.3473 Td (4970 return -1;) 91.7388 Tj 0 -227.8407 Td (4971 }) 34.9481 Tj 0 -237.334 Td (4972 return exec$path, argv$;) 135.4239 Tj 0 -246.8274 Td (4973 }) 26.2111 Tj 0 -256.3207 Td (4974 ) 21.8426 Tj 0 -265.8141 Td (4975 int) 34.9481 Tj 0 -275.3075 Td (4976 sys_pipe$void$) 83.0018 Tj 0 -284.8008 Td (4977 {) 26.2111 Tj 0 -294.2942 Td (4978 int *fd;) 65.5277 Tj 0 -303.7875 Td (4979 struct file *rf, *wf;) 122.3184 Tj 0 -313.2809 Td (4980 int fd0, fd1;) 87.3703 Tj 0 -322.7743 Td (4981 ) 21.8426 Tj 0 -332.2676 Td (4982 if$argptr\(0, \(void*$&fd, 2*sizeof$fd[0]$\) < 0\)) 231.5313 Tj 0 -341.761 Td (4983 return -1;) 83.0018 Tj 0 -351.2543 Td (4984 if$pipealloc\(&rf, &wf$ < 0\)) 148.5295 Tj 0 -360.7477 Td (4985 return -1;) 83.0018 Tj 0 -370.2411 Td (4986 fd0 = -1;) 69.8962 Tj 0 -379.7344 Td (4987 if$\(fd0 = fdalloc\(rf$\) < 0 || $fd1 = fdalloc\(wf$\ \) < 0\){) 270.8479 Tj 0 -389.2278 Td (4988 if$fd0 >= 0$) 91.7388 Tj 0 -398.7211 Td (4989 proc->ofile[fd0] = 0;) 139.7925 Tj 0 -408.2145 Td (4990 fileclose$rf$;) 100.4758 Tj 0 -417.7079 Td (4991 fileclose$wf$;) 100.4758 Tj 0 -427.2012 Td (4992 return -1;) 83.0018 Tj 0 -436.6946 Td (4993 }) 34.9481 Tj 0 -446.1879 Td (4994 fd[0] = fd0;) 83.0018 Tj 0 -455.6813 Td (4995 fd[1] = fd1;) 83.0018 Tj 0 -465.1747 Td (4996 return 0;) 69.8962 Tj 0 -474.668 Td (4997 }) 26.2111 Tj 0 -484.1614 Td (4998 ) 21.8426 Tj 0 -493.6547 Td (4999 ) 21.8426 Tj 0 -522.1348 Td (Sheet 49) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 57 57 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/exec.c Page 1) 161.635 Tj 0 -28.4801 Td (5000 #include "types.h") 100.4758 Tj 0 -37.9735 Td (5001 #include "param.h") 100.4758 Tj 0 -47.4668 Td (5002 #include "mmu.h") 91.7388 Tj 0 -56.9602 Td (5003 #include "proc.h") 96.1073 Tj 0 -66.4535 Td (5004 #include "defs.h") 96.1073 Tj 0 -75.9469 Td (5005 #include "x86.h") 91.7388 Tj 0 -85.4403 Td (5006 #include "elf.h") 91.7388 Tj 0 -94.9336 Td (5007 ) 21.8426 Tj 0 -104.427 Td (5008 int) 34.9481 Tj 0 -113.9203 Td (5009 exec$char *path, char **argv$) 148.5295 Tj 0 -123.4137 Td (5010 {) 26.2111 Tj 0 -132.9071 Td (5011 char *mem, *s, *last;) 122.3184 Tj 0 -142.4004 Td (5012 int i, argc, arglen, len, off;) 161.635 Tj 0 -151.8938 Td (5013 uint sz, sp, argp;) 109.2129 Tj 0 -161.3871 Td (5014 struct elfhdr elf;) 109.2129 Tj 0 -170.8805 Td (5015 struct inode *ip;) 104.8443 Tj 0 -180.3739 Td (5016 struct proghdr ph;) 109.2129 Tj 0 -189.8672 Td (5017 ) 21.8426 Tj 0 -199.3606 Td (5018 mem = 0;) 65.5277 Tj 0 -208.8539 Td (5019 sz = 0;) 61.1592 Tj 0 -218.3473 Td (5020 ) 21.8426 Tj 0 -227.8407 Td (5021 if$\(ip = namei\(path$\) == 0\)) 148.5295 Tj 0 -237.334 Td (5022 return -1;) 83.0018 Tj 0 -246.8274 Td (5023 ilock$ip$;) 74.2647 Tj 0 -256.3207 Td (5024 ) 21.8426 Tj 0 -265.8141 Td (5025 // Check ELF header) 113.5814 Tj 0 -275.3075 Td (5026 if$readi\(ip, \(char*$&elf, 0, sizeof$elf$\) < sizeo\ f$elf$\)) 275.2164 Tj 0 -284.8008 Td (5027 goto bad;) 78.6333 Tj 0 -294.2942 Td (5028 if$elf.magic != ELF_MAGIC$) 144.161 Tj 0 -303.7875 Td (5029 goto bad;) 78.6333 Tj 0 -313.2809 Td (5030 ) 21.8426 Tj 0 -322.7743 Td (5031 // Compute memory size of new process.) 196.5831 Tj 0 -332.2676 Td (5032 // Program segments.) 117.9499 Tj 0 -341.761 Td (5033 for$i=0, off=elf.phoff; i sz$) 270.8479 Tj 0 -218.3473 Td (5070 goto bad;) 87.3703 Tj 0 -227.8407 Td (5071 if$ph.memsz < ph.filesz$) 144.161 Tj 0 -237.334 Td (5072 goto bad;) 87.3703 Tj 0 -246.8274 Td (5073 if$readi\(ip, mem + ph.va, ph.offset, ph.filesz$ != \ ph.filesz\)) 305.796 Tj 0 -256.3207 Td (5074 goto bad;) 87.3703 Tj 0 -265.8141 Td (5075 memset$mem + ph.va + ph.filesz, 0, ph.memsz - ph.file\ sz$;) 288.322 Tj 0 -275.3075 Td (5076 }) 34.9481 Tj 0 -284.8008 Td (5077 iunlockput$ip$;) 96.1073 Tj 0 -294.2942 Td (5078 ) 21.8426 Tj 0 -303.7875 Td (5079 // Initialize stack.) 117.9499 Tj 0 -313.2809 Td (5080 sp = sz;) 65.5277 Tj 0 -322.7743 Td (5081 argp = sz - arglen - 4*$argc+1$;) 170.3721 Tj 0 -332.2676 Td (5082 ) 21.8426 Tj 0 -341.761 Td (5083 // Copy argv strings and pointers to stack.) 218.4257 Tj 0 -351.2543 Td (5084 *$uint*$$mem+argp + 4*argc$ = 0; // argv[argc]) 235.8998 Tj 0 -360.7477 Td (5085 for$i=argc-1; i>=0; i--${) 139.7925 Tj 0 -370.2411 Td (5086 len = strlen$argv[i]$ + 1;) 152.898 Tj 0 -379.7344 Td (5087 sp -= len;) 83.0018 Tj 0 -389.2278 Td (5088 memmove$mem+sp, argv[i], len$;) 170.3721 Tj 0 -398.7211 Td (5089 *$uint*$$mem+argp + 4*i$ = sp; // argv[i]) 222.7942 Tj 0 -408.2145 Td (5090 }) 34.9481 Tj 0 -417.7079 Td (5091 ) 21.8426 Tj 0 -427.2012 Td (5092 // Stack frame for main$argc, argv$, below arguments.) 262.1109 Tj 0 -436.6946 Td (5093 sp = argp;) 74.2647 Tj 0 -446.1879 Td (5094 sp -= 4;) 65.5277 Tj 0 -455.6813 Td (5095 *$uint*$$mem+sp$ = argp;) 135.4239 Tj 0 -465.1747 Td (5096 sp -= 4;) 65.5277 Tj 0 -474.668 Td (5097 *$uint*$$mem+sp$ = argc;) 135.4239 Tj 0 -484.1614 Td (5098 sp -= 4;) 65.5277 Tj 0 -493.6547 Td (5099 *$uint*$$mem+sp$ = 0xffffffff; // fake return pc) 249.0053 Tj 0 -522.1348 Td (Sheet 50) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 58 58 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/exec.c Page 3) 161.635 Tj 0 -28.4801 Td (5100 // Save program name for debugging.) 183.4776 Tj 0 -37.9735 Td (5101 for$last=s=path; *s; s++$) 139.7925 Tj 0 -47.4668 Td (5102 if$*s == '/'$) 96.1073 Tj 0 -56.9602 Td (5103 last = s+1;) 96.1073 Tj 0 -66.4535 Td (5104 safestrcpy$proc->name, last, sizeof\(proc->name$\);) 244.6368 Tj 0 -75.9469 Td (5105 ) 21.8426 Tj 0 -85.4403 Td (5106 // Commit to the new image.) 148.5295 Tj 0 -94.9336 Td (5107 kfree$proc->mem, proc->sz$;) 148.5295 Tj 0 -104.427 Td (5108 proc->mem = mem;) 100.4758 Tj 0 -113.9203 Td (5109 proc->sz = sz;) 91.7388 Tj 0 -123.4137 Td (5110 proc->tf->eip = elf.entry; // main) 183.4776 Tj 0 -132.9071 Td (5111 proc->tf->esp = sp;) 113.5814 Tj 0 -142.4004 Td (5112 usegment;) 78.6333 Tj 0 -151.8938 Td (5113 return 0;) 69.8962 Tj 0 -161.3871 Td (5114 ) 21.8426 Tj 0 -170.8805 Td (5115 bad:) 43.6851 Tj 0 -180.3739 Td (5116 if$mem$) 61.1592 Tj 0 -189.8672 Td (5117 kfree$mem, sz$;) 104.8443 Tj 0 -199.3606 Td (5118 iunlockput$ip$;) 96.1073 Tj 0 -208.8539 Td (5119 return -1;) 74.2647 Tj 0 -218.3473 Td (5120 }) 26.2111 Tj 0 -227.8407 Td (5121 ) 21.8426 Tj 0 -237.334 Td (5122 ) 21.8426 Tj 0 -246.8274 Td (5123 ) 21.8426 Tj 0 -256.3207 Td (5124 ) 21.8426 Tj 0 -265.8141 Td (5125 ) 21.8426 Tj 0 -275.3075 Td (5126 ) 21.8426 Tj 0 -284.8008 Td (5127 ) 21.8426 Tj 0 -294.2942 Td (5128 ) 21.8426 Tj 0 -303.7875 Td (5129 ) 21.8426 Tj 0 -313.2809 Td (5130 ) 21.8426 Tj 0 -322.7743 Td (5131 ) 21.8426 Tj 0 -332.2676 Td (5132 ) 21.8426 Tj 0 -341.761 Td (5133 ) 21.8426 Tj 0 -351.2543 Td (5134 ) 21.8426 Tj 0 -360.7477 Td (5135 ) 21.8426 Tj 0 -370.2411 Td (5136 ) 21.8426 Tj 0 -379.7344 Td (5137 ) 21.8426 Tj 0 -389.2278 Td (5138 ) 21.8426 Tj 0 -398.7211 Td (5139 ) 21.8426 Tj 0 -408.2145 Td (5140 ) 21.8426 Tj 0 -417.7079 Td (5141 ) 21.8426 Tj 0 -427.2012 Td (5142 ) 21.8426 Tj 0 -436.6946 Td (5143 ) 21.8426 Tj 0 -446.1879 Td (5144 ) 21.8426 Tj 0 -455.6813 Td (5145 ) 21.8426 Tj 0 -465.1747 Td (5146 ) 21.8426 Tj 0 -474.668 Td (5147 ) 21.8426 Tj 0 -484.1614 Td (5148 ) 21.8426 Tj 0 -493.6547 Td (5149 ) 21.8426 Tj 0 -522.1348 Td (Sheet 51) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/pipe.c Page 1) 161.635 Tj 0 -28.4801 Td (5150 #include "types.h") 100.4758 Tj 0 -37.9735 Td (5151 #include "defs.h") 96.1073 Tj 0 -47.4668 Td (5152 #include "param.h") 100.4758 Tj 0 -56.9602 Td (5153 #include "mmu.h") 91.7388 Tj 0 -66.4535 Td (5154 #include "proc.h") 96.1073 Tj 0 -75.9469 Td (5155 #include "fs.h") 87.3703 Tj 0 -85.4403 Td (5156 #include "file.h") 96.1073 Tj 0 -94.9336 Td (5157 #include "spinlock.h") 113.5814 Tj 0 -104.427 Td (5158 ) 21.8426 Tj 0 -113.9203 Td (5159 #define PIPESIZE 512) 109.2129 Tj 0 -123.4137 Td (5160 ) 21.8426 Tj 0 -132.9071 Td (5161 struct pipe {) 78.6333 Tj 0 -142.4004 Td (5162 struct spinlock lock;) 122.3184 Tj 0 -151.8938 Td (5163 char data[PIPESIZE];) 117.9499 Tj 0 -161.3871 Td (5164 uint nread; // number of bytes read) 200.9517 Tj 0 -170.8805 Td (5165 uint nwrite; // number of bytes written) 214.0572 Tj 0 -180.3739 Td (5166 int readopen; // read fd is still open) 205.3202 Tj 0 -189.8672 Td (5167 int writeopen; // write fd is still open) 209.6887 Tj 0 -199.3606 Td (5168 };) 30.5796 Tj 0 -208.8539 Td (5169 ) 21.8426 Tj 0 -218.3473 Td (5170 int) 34.9481 Tj 0 -227.8407 Td (5171 pipealloc$struct file **f0, struct file **f1$) 218.4257 Tj 0 -237.334 Td (5172 {) 26.2111 Tj 0 -246.8274 Td (5173 struct pipe *p;) 96.1073 Tj 0 -256.3207 Td (5174 ) 21.8426 Tj 0 -265.8141 Td (5175 p = 0;) 56.7907 Tj 0 -275.3075 Td (5176 *f0 = *f1 = 0;) 91.7388 Tj 0 -284.8008 Td (5177 if$\(*f0 = filealloc\($\) == 0 || $*f1 = filealloc\($\ \) == 0\)) 275.2164 Tj 0 -294.2942 Td (5178 goto bad;) 78.6333 Tj 0 -303.7875 Td (5179 if$\(p = \(struct pipe*$kalloc$PAGE$\) == 0\)) 209.6887 Tj 0 -313.2809 Td (5180 goto bad;) 78.6333 Tj 0 -322.7743 Td (5181 p->readopen = 1;) 100.4758 Tj 0 -332.2676 Td (5182 p->writeopen = 1;) 104.8443 Tj 0 -341.761 Td (5183 p->nwrite = 0;) 91.7388 Tj 0 -351.2543 Td (5184 p->nread = 0;) 87.3703 Tj 0 -360.7477 Td (5185 initlock$&p->lock, "pipe"$;) 148.5295 Tj 0 -370.2411 Td (5186 $*f0$->type = FD_PIPE;) 126.6869 Tj 0 -379.7344 Td (5187 $*f0$->readable = 1;) 117.9499 Tj 0 -389.2278 Td (5188 $*f0$->writable = 0;) 117.9499 Tj 0 -398.7211 Td (5189 $*f0$->pipe = p;) 100.4758 Tj 0 -408.2145 Td (5190 $*f1$->type = FD_PIPE;) 126.6869 Tj 0 -417.7079 Td (5191 $*f1$->readable = 0;) 117.9499 Tj 0 -427.2012 Td (5192 $*f1$->writable = 1;) 117.9499 Tj 0 -436.6946 Td (5193 $*f1$->pipe = p;) 100.4758 Tj 0 -446.1879 Td (5194 return 0;) 69.8962 Tj 0 -455.6813 Td (5195 ) 21.8426 Tj 0 -465.1747 Td (5196 ) 21.8426 Tj 0 -474.668 Td (5197 ) 21.8426 Tj 0 -484.1614 Td (5198 ) 21.8426 Tj 0 -493.6547 Td (5199 ) 21.8426 Tj 0 -522.1348 Td (Sheet 51) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 59 59 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/pipe.c Page 2) 161.635 Tj 0 -28.4801 Td (5200 bad:) 43.6851 Tj 0 -37.9735 Td (5201 if$p$) 52.4222 Tj 0 -47.4668 Td (5202 kfree$\(char*$p, PAGE\);) 135.4239 Tj 0 -56.9602 Td (5203 if$*f0$) 61.1592 Tj 0 -66.4535 Td (5204 fileclose$*f0$;) 104.8443 Tj 0 -75.9469 Td (5205 if$*f1$) 61.1592 Tj 0 -85.4403 Td (5206 fileclose$*f1$;) 104.8443 Tj 0 -94.9336 Td (5207 return -1;) 74.2647 Tj 0 -104.427 Td (5208 }) 26.2111 Tj 0 -113.9203 Td (5209 ) 21.8426 Tj 0 -123.4137 Td (5210 void) 39.3166 Tj 0 -132.9071 Td (5211 pipeclose$struct pipe *p, int writable$) 192.2146 Tj 0 -142.4004 Td (5212 {) 26.2111 Tj 0 -151.8938 Td (5213 acquire$&p->lock$;) 109.2129 Tj 0 -161.3871 Td (5214 if$writable${) 87.3703 Tj 0 -170.8805 Td (5215 p->writeopen = 0;) 113.5814 Tj 0 -180.3739 Td (5216 wakeup$&p->nread$;) 117.9499 Tj 0 -189.8672 Td (5217 } else {) 65.5277 Tj 0 -199.3606 Td (5218 p->readopen = 0;) 109.2129 Tj 0 -208.8539 Td (5219 wakeup$&p->nwrite$;) 122.3184 Tj 0 -218.3473 Td (5220 }) 34.9481 Tj 0 -227.8407 Td (5221 if$p->readopen == 0 && p->writeopen == 0$ {) 218.4257 Tj 0 -237.334 Td (5222 release$&p->lock$;) 117.9499 Tj 0 -246.8274 Td (5223 kfree$\(char*$p, PAGE\);) 135.4239 Tj 0 -256.3207 Td (5224 } else) 56.7907 Tj 0 -265.8141 Td (5225 release$&p->lock$;) 117.9499 Tj 0 -275.3075 Td (5226 }) 26.2111 Tj 0 -284.8008 Td (5227 ) 21.8426 Tj 0 -294.2942 Td (5228 ) 21.8426 Tj 0 -303.7875 Td (5229 int) 34.9481 Tj 0 -313.2809 Td (5230 pipewrite$struct pipe *p, char *addr, int n$) 214.0572 Tj 0 -322.7743 Td (5231 {) 26.2111 Tj 0 -332.2676 Td (5232 int i;) 56.7907 Tj 0 -341.761 Td (5233 ) 21.8426 Tj 0 -351.2543 Td (5234 acquire$&p->lock$;) 109.2129 Tj 0 -360.7477 Td (5235 for$i = 0; i < n; i++${) 131.0554 Tj 0 -370.2411 Td (5236 while$p->nwrite == p->nread + PIPESIZE$ { ) 227.1628 Tj 0 -379.7344 Td (5237 if$p->readopen == 0 || proc->killed${) 209.6887 Tj 0 -389.2278 Td (5238 release$&p->lock$;) 135.4239 Tj 0 -398.7211 Td (5239 return -1;) 100.4758 Tj 0 -408.2145 Td (5240 }) 52.4222 Tj 0 -417.7079 Td (5241 wakeup$&p->nread$;) 126.6869 Tj 0 -427.2012 Td (5242 sleep$&p->nwrite, &p->lock$; ) 179.1091 Tj 0 -436.6946 Td (5243 }) 43.6851 Tj 0 -446.1879 Td (5244 p->data[p->nwrite++ % PIPESIZE] = addr[i];) 222.7942 Tj 0 -455.6813 Td (5245 }) 34.9481 Tj 0 -465.1747 Td (5246 wakeup$&p->nread$; ) 117.9499 Tj 0 -474.668 Td (5247 release$&p->lock$;) 109.2129 Tj 0 -484.1614 Td (5248 return n;) 69.8962 Tj 0 -493.6547 Td (5249 }) 26.2111 Tj 0 -522.1348 Td (Sheet 52) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/pipe.c Page 3) 161.635 Tj 0 -28.4801 Td (5250 int) 34.9481 Tj 0 -37.9735 Td (5251 piperead$struct pipe *p, char *addr, int n$) 209.6887 Tj 0 -47.4668 Td (5252 {) 26.2111 Tj 0 -56.9602 Td (5253 int i;) 56.7907 Tj 0 -66.4535 Td (5254 ) 21.8426 Tj 0 -75.9469 Td (5255 acquire$&p->lock$;) 109.2129 Tj 0 -85.4403 Td (5256 while$p->nread == p->nwrite && p->writeopen${ ) 235.8998 Tj 0 -94.9336 Td (5257 if$proc->killed${) 113.5814 Tj 0 -104.427 Td (5258 release$&p->lock$;) 126.6869 Tj 0 -113.9203 Td (5259 return -1;) 91.7388 Tj 0 -123.4137 Td (5260 }) 43.6851 Tj 0 -132.9071 Td (5261 sleep$&p->nread, &p->lock$; ) 161.635 Tj 0 -142.4004 Td (5262 }) 34.9481 Tj 0 -151.8938 Td (5263 for$i = 0; i < n; i++${ ) 139.7925 Tj 0 -161.3871 Td (5264 if$p->nread == p->nwrite$) 148.5295 Tj 0 -170.8805 Td (5265 break;) 74.2647 Tj 0 -180.3739 Td (5266 addr[i] = p->data[p->nread++ % PIPESIZE];) 218.4257 Tj 0 -189.8672 Td (5267 }) 34.9481 Tj 0 -199.3606 Td (5268 wakeup$&p->nwrite$; ) 122.3184 Tj 0 -208.8539 Td (5269 release$&p->lock$;) 109.2129 Tj 0 -218.3473 Td (5270 return i;) 69.8962 Tj 0 -227.8407 Td (5271 }) 26.2111 Tj 0 -237.334 Td (5272 ) 21.8426 Tj 0 -246.8274 Td (5273 ) 21.8426 Tj 0 -256.3207 Td (5274 ) 21.8426 Tj 0 -265.8141 Td (5275 ) 21.8426 Tj 0 -275.3075 Td (5276 ) 21.8426 Tj 0 -284.8008 Td (5277 ) 21.8426 Tj 0 -294.2942 Td (5278 ) 21.8426 Tj 0 -303.7875 Td (5279 ) 21.8426 Tj 0 -313.2809 Td (5280 ) 21.8426 Tj 0 -322.7743 Td (5281 ) 21.8426 Tj 0 -332.2676 Td (5282 ) 21.8426 Tj 0 -341.761 Td (5283 ) 21.8426 Tj 0 -351.2543 Td (5284 ) 21.8426 Tj 0 -360.7477 Td (5285 ) 21.8426 Tj 0 -370.2411 Td (5286 ) 21.8426 Tj 0 -379.7344 Td (5287 ) 21.8426 Tj 0 -389.2278 Td (5288 ) 21.8426 Tj 0 -398.7211 Td (5289 ) 21.8426 Tj 0 -408.2145 Td (5290 ) 21.8426 Tj 0 -417.7079 Td (5291 ) 21.8426 Tj 0 -427.2012 Td (5292 ) 21.8426 Tj 0 -436.6946 Td (5293 ) 21.8426 Tj 0 -446.1879 Td (5294 ) 21.8426 Tj 0 -455.6813 Td (5295 ) 21.8426 Tj 0 -465.1747 Td (5296 ) 21.8426 Tj 0 -474.668 Td (5297 ) 21.8426 Tj 0 -484.1614 Td (5298 ) 21.8426 Tj 0 -493.6547 Td (5299 ) 21.8426 Tj 0 -522.1348 Td (Sheet 52) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 60 60 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/string.c Page 1) 170.3721 Tj 0 -28.4801 Td (5300 #include "types.h") 100.4758 Tj 0 -37.9735 Td (5301 #include "x86.h") 91.7388 Tj 0 -47.4668 Td (5302 ) 21.8426 Tj 0 -56.9602 Td (5303 void*) 43.6851 Tj 0 -66.4535 Td (5304 memset$void *dst, int c, uint n$) 161.635 Tj 0 -75.9469 Td (5305 {) 26.2111 Tj 0 -85.4403 Td (5306 stosb$dst, c, n$;) 104.8443 Tj 0 -94.9336 Td (5307 return dst;) 78.6333 Tj 0 -104.427 Td (5308 }) 26.2111 Tj 0 -113.9203 Td (5309 ) 21.8426 Tj 0 -123.4137 Td (5310 int) 34.9481 Tj 0 -132.9071 Td (5311 memcmp$const void *v1, const void *v2, uint n$) 222.7942 Tj 0 -142.4004 Td (5312 {) 26.2111 Tj 0 -151.8938 Td (5313 const uchar *s1, *s2;) 122.3184 Tj 0 -161.3871 Td (5314 ) 21.8426 Tj 0 -170.8805 Td (5315 s1 = v1;) 65.5277 Tj 0 -180.3739 Td (5316 s2 = v2;) 65.5277 Tj 0 -189.8672 Td (5317 while$n-- > 0${) 96.1073 Tj 0 -199.3606 Td (5318 if$*s1 != *s2$) 100.4758 Tj 0 -208.8539 Td (5319 return *s1 - *s2;) 122.3184 Tj 0 -218.3473 Td (5320 s1++, s2++;) 87.3703 Tj 0 -227.8407 Td (5321 }) 34.9481 Tj 0 -237.334 Td (5322 ) 21.8426 Tj 0 -246.8274 Td (5323 return 0;) 69.8962 Tj 0 -256.3207 Td (5324 }) 26.2111 Tj 0 -265.8141 Td (5325 ) 21.8426 Tj 0 -275.3075 Td (5326 void*) 43.6851 Tj 0 -284.8008 Td (5327 memmove$void *dst, const void *src, uint n$) 209.6887 Tj 0 -294.2942 Td (5328 {) 26.2111 Tj 0 -303.7875 Td (5329 const char *s;) 91.7388 Tj 0 -313.2809 Td (5330 char *d;) 65.5277 Tj 0 -322.7743 Td (5331 ) 21.8426 Tj 0 -332.2676 Td (5332 s = src;) 65.5277 Tj 0 -341.761 Td (5333 d = dst;) 65.5277 Tj 0 -351.2543 Td (5334 if$s < d && s + n > d${) 131.0554 Tj 0 -360.7477 Td (5335 s += n;) 69.8962 Tj 0 -370.2411 Td (5336 d += n;) 69.8962 Tj 0 -379.7344 Td (5337 while$n-- > 0$) 100.4758 Tj 0 -389.2278 Td (5338 *--d = *--s;) 100.4758 Tj 0 -398.7211 Td (5339 } else) 56.7907 Tj 0 -408.2145 Td (5340 while$n-- > 0$) 100.4758 Tj 0 -417.7079 Td (5341 *d++ = *s++;) 100.4758 Tj 0 -427.2012 Td (5342 ) 21.8426 Tj 0 -436.6946 Td (5343 return dst;) 78.6333 Tj 0 -446.1879 Td (5344 }) 26.2111 Tj 0 -455.6813 Td (5345 ) 21.8426 Tj 0 -465.1747 Td (5346 ) 21.8426 Tj 0 -474.668 Td (5347 ) 21.8426 Tj 0 -484.1614 Td (5348 ) 21.8426 Tj 0 -493.6547 Td (5349 ) 21.8426 Tj 0 -522.1348 Td (Sheet 53) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/string.c Page 2) 170.3721 Tj 0 -28.4801 Td (5350 int) 34.9481 Tj 0 -37.9735 Td (5351 strncmp$const char *p, const char *q, uint n$) 218.4257 Tj 0 -47.4668 Td (5352 {) 26.2111 Tj 0 -56.9602 Td (5353 while$n > 0 && *p && *p == *q$) 161.635 Tj 0 -66.4535 Td (5354 n--, p++, q++;) 100.4758 Tj 0 -75.9469 Td (5355 if$n == 0$) 74.2647 Tj 0 -85.4403 Td (5356 return 0;) 78.6333 Tj 0 -94.9336 Td (5357 return $uchar$*p - $uchar$*q;) 157.2665 Tj 0 -104.427 Td (5358 }) 26.2111 Tj 0 -113.9203 Td (5359 ) 21.8426 Tj 0 -123.4137 Td (5360 char*) 43.6851 Tj 0 -132.9071 Td (5361 strncpy$char *s, const char *t, int n$) 187.8461 Tj 0 -142.4004 Td (5362 {) 26.2111 Tj 0 -151.8938 Td (5363 char *os;) 69.8962 Tj 0 -161.3871 Td (5364 ) 21.8426 Tj 0 -170.8805 Td (5365 os = s;) 61.1592 Tj 0 -180.3739 Td (5366 while$n-- > 0 && \(*s++ = *t++$ != 0\)) 187.8461 Tj 0 -189.8672 Td (5367 ;) 43.6851 Tj 0 -199.3606 Td (5368 while$n-- > 0$) 91.7388 Tj 0 -208.8539 Td (5369 *s++ = 0;) 78.6333 Tj 0 -218.3473 Td (5370 return os;) 74.2647 Tj 0 -227.8407 Td (5371 }) 26.2111 Tj 0 -237.334 Td (5372 ) 21.8426 Tj 0 -246.8274 Td (5373 // Like strncpy but guaranteed to NUL-terminate.) 231.5313 Tj 0 -256.3207 Td (5374 char*) 43.6851 Tj 0 -265.8141 Td (5375 safestrcpy$char *s, const char *t, int n$) 200.9517 Tj 0 -275.3075 Td (5376 {) 26.2111 Tj 0 -284.8008 Td (5377 char *os;) 69.8962 Tj 0 -294.2942 Td (5378 ) 21.8426 Tj 0 -303.7875 Td (5379 os = s;) 61.1592 Tj 0 -313.2809 Td (5380 if$n <= 0$) 74.2647 Tj 0 -322.7743 Td (5381 return os;) 83.0018 Tj 0 -332.2676 Td (5382 while$--n > 0 && \(*s++ = *t++$ != 0\)) 187.8461 Tj 0 -341.761 Td (5383 ;) 43.6851 Tj 0 -351.2543 Td (5384 *s = 0;) 61.1592 Tj 0 -360.7477 Td (5385 return os;) 74.2647 Tj 0 -370.2411 Td (5386 }) 26.2111 Tj 0 -379.7344 Td (5387 ) 21.8426 Tj 0 -389.2278 Td (5388 int) 34.9481 Tj 0 -398.7211 Td (5389 strlen$const char *s$) 113.5814 Tj 0 -408.2145 Td (5390 {) 26.2111 Tj 0 -417.7079 Td (5391 int n;) 56.7907 Tj 0 -427.2012 Td (5392 ) 21.8426 Tj 0 -436.6946 Td (5393 for$n = 0; s[n]; n++$) 122.3184 Tj 0 -446.1879 Td (5394 ;) 43.6851 Tj 0 -455.6813 Td (5395 return n;) 69.8962 Tj 0 -465.1747 Td (5396 }) 26.2111 Tj 0 -474.668 Td (5397 ) 21.8426 Tj 0 -484.1614 Td (5398 ) 21.8426 Tj 0 -493.6547 Td (5399 ) 21.8426 Tj 0 -522.1348 Td (Sheet 53) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 61 61 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/mp.h Page 1) 152.898 Tj 0 -28.4801 Td (5400 // See MultiProcessor Specification Version 1.[14]) 240.2683 Tj 0 -37.9735 Td (5401 ) 21.8426 Tj 0 -47.4668 Td (5402 struct mp { // floating pointer) 209.6887 Tj 0 -56.9602 Td (5403 uchar signature[4]; // "_MP_") 200.9517 Tj 0 -66.4535 Td (5404 void *physaddr; // phys addr of MP config \ table) 297.059 Tj 0 -75.9469 Td (5405 uchar length; // 1) 179.1091 Tj 0 -85.4403 Td (5406 uchar specrev; // [14]) 192.2146 Tj 0 -94.9336 Td (5407 uchar checksum; // all bytes must add up t\ o 0) 288.322 Tj 0 -104.427 Td (5408 uchar type; // MP system config type) 266.4794 Tj 0 -113.9203 Td (5409 uchar imcrp;) 83.0018 Tj 0 -123.4137 Td (5410 uchar reserved[3];) 109.2129 Tj 0 -132.9071 Td (5411 };) 30.5796 Tj 0 -142.4004 Td (5412 ) 21.8426 Tj 0 -151.8938 Td (5413 struct mpconf { // configuration table header) 253.3738 Tj 0 -161.3871 Td (5414 uchar signature[4]; // "PCMP") 200.9517 Tj 0 -170.8805 Td (5415 ushort length; // total table length) 253.3738 Tj 0 -180.3739 Td (5416 uchar version; // [14]) 192.2146 Tj 0 -189.8672 Td (5417 uchar checksum; // all bytes must add up t\ o 0) 288.322 Tj 0 -199.3606 Td (5418 uchar product[20]; // product id) 218.4257 Tj 0 -208.8539 Td (5419 uint *oemtable; // OEM table pointer) 249.0053 Tj 0 -218.3473 Td (5420 ushort oemlength; // OEM table length) 244.6368 Tj 0 -227.8407 Td (5421 ushort entry; // entry count) 222.7942 Tj 0 -237.334 Td (5422 uint *lapicaddr; // address of local APIC) 266.4794 Tj 0 -246.8274 Td (5423 ushort xlength; // extended table length) 266.4794 Tj 0 -256.3207 Td (5424 uchar xchecksum; // extended table checksum) 275.2164 Tj 0 -265.8141 Td (5425 uchar reserved;) 96.1073 Tj 0 -275.3075 Td (5426 };) 30.5796 Tj 0 -284.8008 Td (5427 ) 21.8426 Tj 0 -294.2942 Td (5428 struct mpproc { // processor table entry) 231.5313 Tj 0 -303.7875 Td (5429 uchar type; // entry type $0$) 235.8998 Tj 0 -313.2809 Td (5430 uchar apicid; // local APIC id) 231.5313 Tj 0 -322.7743 Td (5431 uchar version; // local APIC verison) 253.3738 Tj 0 -332.2676 Td (5432 uchar flags; // CPU flags) 214.0572 Tj 0 -341.761 Td (5433 #define MPBOOT 0x02 // This proc is the boot\ strap processor.) 345.1126 Tj 0 -351.2543 Td (5434 uchar signature[4]; // CPU signature) 231.5313 Tj 0 -360.7477 Td (5435 uint feature; // feature flags from CPUI\ D instruction) 332.0071 Tj 0 -370.2411 Td (5436 uchar reserved[8];) 109.2129 Tj 0 -379.7344 Td (5437 };) 30.5796 Tj 0 -389.2278 Td (5438 ) 21.8426 Tj 0 -398.7211 Td (5439 struct mpioapic { // I/O APIC table entry) 227.1628 Tj 0 -408.2145 Td (5440 uchar type; // entry type $2$) 235.8998 Tj 0 -417.7079 Td (5441 uchar apicno; // I/O APIC id) 222.7942 Tj 0 -427.2012 Td (5442 uchar version; // I/O APIC version) 244.6368 Tj 0 -436.6946 Td (5443 uchar flags; // I/O APIC flags) 235.8998 Tj 0 -446.1879 Td (5444 uint *addr; // I/O APIC address) 240.2683 Tj 0 -455.6813 Td (5445 };) 30.5796 Tj 0 -465.1747 Td (5446 ) 21.8426 Tj 0 -474.668 Td (5447 ) 21.8426 Tj 0 -484.1614 Td (5448 ) 21.8426 Tj 0 -493.6547 Td (5449 ) 21.8426 Tj 0 -522.1348 Td (Sheet 54) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/mp.h Page 2) 152.898 Tj 0 -28.4801 Td (5450 // Table entry types) 109.2129 Tj 0 -37.9735 Td (5451 #define MPPROC 0x00 // One per processor) 214.0572 Tj 0 -47.4668 Td (5452 #define MPBUS 0x01 // One per bus) 187.8461 Tj 0 -56.9602 Td (5453 #define MPIOAPIC 0x02 // One per I/O APIC) 209.6887 Tj 0 -66.4535 Td (5454 #define MPIOINTR 0x03 // One per bus interrupt source) 262.1109 Tj 0 -75.9469 Td (5455 #define MPLINTR 0x04 // One per system interrupt source) 275.2164 Tj 0 -85.4403 Td (5456 ) 21.8426 Tj 0 -94.9336 Td (5457 ) 21.8426 Tj 0 -104.427 Td (5458 ) 21.8426 Tj 0 -113.9203 Td (5459 ) 21.8426 Tj 0 -123.4137 Td (5460 ) 21.8426 Tj 0 -132.9071 Td (5461 ) 21.8426 Tj 0 -142.4004 Td (5462 ) 21.8426 Tj 0 -151.8938 Td (5463 ) 21.8426 Tj 0 -161.3871 Td (5464 ) 21.8426 Tj 0 -170.8805 Td (5465 ) 21.8426 Tj 0 -180.3739 Td (5466 ) 21.8426 Tj 0 -189.8672 Td (5467 ) 21.8426 Tj 0 -199.3606 Td (5468 ) 21.8426 Tj 0 -208.8539 Td (5469 ) 21.8426 Tj 0 -218.3473 Td (5470 ) 21.8426 Tj 0 -227.8407 Td (5471 ) 21.8426 Tj 0 -237.334 Td (5472 ) 21.8426 Tj 0 -246.8274 Td (5473 ) 21.8426 Tj 0 -256.3207 Td (5474 ) 21.8426 Tj 0 -265.8141 Td (5475 ) 21.8426 Tj 0 -275.3075 Td (5476 ) 21.8426 Tj 0 -284.8008 Td (5477 ) 21.8426 Tj 0 -294.2942 Td (5478 ) 21.8426 Tj 0 -303.7875 Td (5479 ) 21.8426 Tj 0 -313.2809 Td (5480 ) 21.8426 Tj 0 -322.7743 Td (5481 ) 21.8426 Tj 0 -332.2676 Td (5482 ) 21.8426 Tj 0 -341.761 Td (5483 ) 21.8426 Tj 0 -351.2543 Td (5484 ) 21.8426 Tj 0 -360.7477 Td (5485 ) 21.8426 Tj 0 -370.2411 Td (5486 ) 21.8426 Tj 0 -379.7344 Td (5487 ) 21.8426 Tj 0 -389.2278 Td (5488 ) 21.8426 Tj 0 -398.7211 Td (5489 ) 21.8426 Tj 0 -408.2145 Td (5490 ) 21.8426 Tj 0 -417.7079 Td (5491 ) 21.8426 Tj 0 -427.2012 Td (5492 ) 21.8426 Tj 0 -436.6946 Td (5493 ) 21.8426 Tj 0 -446.1879 Td (5494 ) 21.8426 Tj 0 -455.6813 Td (5495 ) 21.8426 Tj 0 -465.1747 Td (5496 ) 21.8426 Tj 0 -474.668 Td (5497 ) 21.8426 Tj 0 -484.1614 Td (5498 ) 21.8426 Tj 0 -493.6547 Td (5499 ) 21.8426 Tj 0 -522.1348 Td (Sheet 54) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 62 62 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/mp.c Page 1) 152.898 Tj 0 -28.4801 Td (5500 // Multiprocessor bootstrap.) 144.161 Tj 0 -37.9735 Td (5501 // Search memory for MP description structures.) 227.1628 Tj 0 -47.4668 Td (5502 // http://developer.intel.com/design/pentium/datashts/2420\ 1606.pdf) 310.1645 Tj 0 -56.9602 Td (5503 ) 21.8426 Tj 0 -66.4535 Td (5504 #include "types.h") 100.4758 Tj 0 -75.9469 Td (5505 #include "defs.h") 96.1073 Tj 0 -85.4403 Td (5506 #include "param.h") 100.4758 Tj 0 -94.9336 Td (5507 #include "mp.h") 87.3703 Tj 0 -104.427 Td (5508 #include "x86.h") 91.7388 Tj 0 -113.9203 Td (5509 #include "mmu.h") 91.7388 Tj 0 -123.4137 Td (5510 #include "proc.h") 96.1073 Tj 0 -132.9071 Td (5511 ) 21.8426 Tj 0 -142.4004 Td (5512 struct cpu cpus[NCPU];) 117.9499 Tj 0 -151.8938 Td (5513 static struct cpu *bcpu;) 126.6869 Tj 0 -161.3871 Td (5514 int ismp;) 61.1592 Tj 0 -170.8805 Td (5515 int ncpu;) 61.1592 Tj 0 -180.3739 Td (5516 uchar ioapicid;) 87.3703 Tj 0 -189.8672 Td (5517 ) 21.8426 Tj 0 -199.3606 Td (5518 int) 34.9481 Tj 0 -208.8539 Td (5519 mpbcpu$void$) 74.2647 Tj 0 -218.3473 Td (5520 {) 26.2111 Tj 0 -227.8407 Td (5521 return bcpu-cpus;) 104.8443 Tj 0 -237.334 Td (5522 }) 26.2111 Tj 0 -246.8274 Td (5523 ) 21.8426 Tj 0 -256.3207 Td (5524 static uchar) 74.2647 Tj 0 -265.8141 Td (5525 sum$uchar *addr, int len$) 131.0554 Tj 0 -275.3075 Td (5526 {) 26.2111 Tj 0 -284.8008 Td (5527 int i, sum;) 78.6333 Tj 0 -294.2942 Td (5528 ) 21.8426 Tj 0 -303.7875 Td (5529 sum = 0;) 65.5277 Tj 0 -313.2809 Td (5530 for$i=0; iphysaddr == 0$) 235.8998 Tj 0 -370.2411 Td (5586 return 0;) 78.6333 Tj 0 -379.7344 Td (5587 conf = $struct mpconf*$mp->physaddr;) 187.8461 Tj 0 -389.2278 Td (5588 if$memcmp\(conf, "PCMP", 4$ != 0\)) 170.3721 Tj 0 -398.7211 Td (5589 return 0;) 78.6333 Tj 0 -408.2145 Td (5590 if$conf->version != 1 && conf->version != 4$) 222.7942 Tj 0 -417.7079 Td (5591 return 0;) 78.6333 Tj 0 -427.2012 Td (5592 if$sum\(\(uchar*$conf, conf->length\) != 0\)) 205.3202 Tj 0 -436.6946 Td (5593 return 0;) 78.6333 Tj 0 -446.1879 Td (5594 *pmp = mp;) 74.2647 Tj 0 -455.6813 Td (5595 return conf;) 83.0018 Tj 0 -465.1747 Td (5596 }) 26.2111 Tj 0 -474.668 Td (5597 ) 21.8426 Tj 0 -484.1614 Td (5598 ) 21.8426 Tj 0 -493.6547 Td (5599 ) 21.8426 Tj 0 -522.1348 Td (Sheet 55) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 63 63 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/mp.c Page 3) 152.898 Tj 0 -28.4801 Td (5600 void) 39.3166 Tj 0 -37.9735 Td (5601 mpinit$void$) 74.2647 Tj 0 -47.4668 Td (5602 {) 26.2111 Tj 0 -56.9602 Td (5603 uchar *p, *e;) 87.3703 Tj 0 -66.4535 Td (5604 struct mp *mp;) 91.7388 Tj 0 -75.9469 Td (5605 struct mpconf *conf;) 117.9499 Tj 0 -85.4403 Td (5606 struct mpproc *proc;) 117.9499 Tj 0 -94.9336 Td (5607 struct mpioapic *ioapic;) 135.4239 Tj 0 -104.427 Td (5608 ) 21.8426 Tj 0 -113.9203 Td (5609 bcpu = &cpus[0];) 100.4758 Tj 0 -123.4137 Td (5610 if$\(conf = mpconfig\(&mp$\) == 0\)) 166.0035 Tj 0 -132.9071 Td (5611 return;) 69.8962 Tj 0 -142.4004 Td (5612 ismp = 1;) 69.8962 Tj 0 -151.8938 Td (5613 lapic = $uint*$conf->lapicaddr;) 166.0035 Tj 0 -161.3871 Td (5614 for$p=\(uchar*$$conf+1$, e=$uchar*$conf+conf->leng\ th; papicid\) {) 161.635 Tj 0 -208.8539 Td (5619 cprintf$"mpinit: ncpu=%d apicpid=%d", ncpu, proc-\ >apicid$;) 310.1645 Tj 0 -218.3473 Td (5620 panic$"mpinit"$;) 126.6869 Tj 0 -227.8407 Td (5621 }) 52.4222 Tj 0 -237.334 Td (5622 if$proc->flags & MPBOOT$) 152.898 Tj 0 -246.8274 Td (5623 bcpu = &cpus[ncpu];) 139.7925 Tj 0 -256.3207 Td (5624 cpus[ncpu].id = ncpu;) 139.7925 Tj 0 -265.8141 Td (5625 ncpu++;) 78.6333 Tj 0 -275.3075 Td (5626 p += sizeof$struct mpproc$;) 166.0035 Tj 0 -284.8008 Td (5627 continue;) 87.3703 Tj 0 -294.2942 Td (5628 case MPIOAPIC:) 100.4758 Tj 0 -303.7875 Td (5629 ioapic = $struct mpioapic*$p;) 174.7406 Tj 0 -313.2809 Td (5630 ioapicid = ioapic->apicno;) 161.635 Tj 0 -322.7743 Td (5631 p += sizeof$struct mpioapic$;) 174.7406 Tj 0 -332.2676 Td (5632 continue;) 87.3703 Tj 0 -341.761 Td (5633 case MPBUS:) 87.3703 Tj 0 -351.2543 Td (5634 case MPIOINTR:) 100.4758 Tj 0 -360.7477 Td (5635 case MPLINTR:) 96.1073 Tj 0 -370.2411 Td (5636 p += 8;) 78.6333 Tj 0 -379.7344 Td (5637 continue;) 87.3703 Tj 0 -389.2278 Td (5638 default:) 74.2647 Tj 0 -398.7211 Td (5639 cprintf$"mpinit: unknown config type %x\\n", *p$;) 257.7424 Tj 0 -408.2145 Td (5640 panic$"mpinit"$;) 117.9499 Tj 0 -417.7079 Td (5641 }) 43.6851 Tj 0 -427.2012 Td (5642 }) 34.9481 Tj 0 -436.6946 Td (5643 if$mp->imcrp${) 91.7388 Tj 0 -446.1879 Td (5644 // Bochs doesn't support IMCR, so this doesn't run on \ Bochs.) 301.4275 Tj 0 -455.6813 Td (5645 // But it would on real hardware.) 183.4776 Tj 0 -465.1747 Td (5646 outb$0x22, 0x70$; // Select IMCR) 187.8461 Tj 0 -474.668 Td (5647 outb$0x23, inb\(0x23$ | 1\); // Mask external inter\ rupts.) 283.9534 Tj 0 -484.1614 Td (5648 }) 34.9481 Tj 0 -493.6547 Td (5649 }) 26.2111 Tj 0 -522.1348 Td (Sheet 56) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/lapic.c Page 1) 166.0035 Tj 0 -28.4801 Td (5650 // The local APIC manages internal $non-I/O$ interrupts.) 266.4794 Tj 0 -37.9735 Td (5651 // See Chapter 8 & Appendix C of Intel processor manual vo\ lume 3.) 305.796 Tj 0 -47.4668 Td (5652 ) 21.8426 Tj 0 -56.9602 Td (5653 #include "types.h") 100.4758 Tj 0 -66.4535 Td (5654 #include "defs.h") 96.1073 Tj 0 -75.9469 Td (5655 #include "traps.h") 100.4758 Tj 0 -85.4403 Td (5656 #include "mmu.h") 91.7388 Tj 0 -94.9336 Td (5657 #include "x86.h") 91.7388 Tj 0 -104.427 Td (5658 ) 21.8426 Tj 0 -113.9203 Td (5659 // Local APIC registers, divided by 4 for use as uint[] in\ dices.) 301.4275 Tj 0 -123.4137 Td (5660 #define ID $0x0020/4$ // ID) 170.3721 Tj 0 -132.9071 Td (5661 #define VER $0x0030/4$ // Version) 192.2146 Tj 0 -142.4004 Td (5662 #define TPR $0x0080/4$ // Task Priority) 218.4257 Tj 0 -151.8938 Td (5663 #define EOI $0x00B0/4$ // EOI) 174.7406 Tj 0 -161.3871 Td (5664 #define SVR $0x00F0/4$ // Spurious Interrupt Vecto\ r) 270.8479 Tj 0 -170.8805 Td (5665 #define ENABLE 0x00000100 // Unit Enable) 231.5313 Tj 0 -180.3739 Td (5666 #define ESR $0x0280/4$ // Error Status) 214.0572 Tj 0 -189.8672 Td (5667 #define ICRLO $0x0300/4$ // Interrupt Command) 235.8998 Tj 0 -199.3606 Td (5668 #define INIT 0x00000500 // INIT/RESET) 227.1628 Tj 0 -208.8539 Td (5669 #define STARTUP 0x00000600 // Startup IPI) 231.5313 Tj 0 -218.3473 Td (5670 #define DELIVS 0x00001000 // Delivery status) 249.0053 Tj 0 -227.8407 Td (5671 #define ASSERT 0x00004000 // Assert interrupt $vs\ deassert$) 314.533 Tj 0 -237.334 Td (5672 #define LEVEL 0x00008000 // Level triggered) 249.0053 Tj 0 -246.8274 Td (5673 #define BCAST 0x00080000 // Send to all APICs, in\ cluding self.) 332.0071 Tj 0 -256.3207 Td (5674 #define ICRHI $0x0310/4$ // Interrupt Command [63:32\ ]) 270.8479 Tj 0 -265.8141 Td (5675 #define TIMER $0x0320/4$ // Local Vector Table 0 $T\ IMER$) 283.9534 Tj 0 -275.3075 Td (5676 #define X1 0x0000000B // divide counts by 1) 262.1109 Tj 0 -284.8008 Td (5677 #define PERIODIC 0x00020000 // Periodic) 218.4257 Tj 0 -294.2942 Td (5678 #define PCINT $0x0340/4$ // Performance Counter LVT) 262.1109 Tj 0 -303.7875 Td (5679 #define LINT0 $0x0350/4$ // Local Vector Table 1 $L\ INT0$) 283.9534 Tj 0 -313.2809 Td (5680 #define LINT1 $0x0360/4$ // Local Vector Table 2 $L\ INT1$) 283.9534 Tj 0 -322.7743 Td (5681 #define ERROR $0x0370/4$ // Local Vector Table 3 $E\ RROR$) 283.9534 Tj 0 -332.2676 Td (5682 #define MASKED 0x00010000 // Interrupt masked) 253.3738 Tj 0 -341.761 Td (5683 #define TICR $0x0380/4$ // Timer Initial Count) 244.6368 Tj 0 -351.2543 Td (5684 #define TCCR $0x0390/4$ // Timer Current Count) 244.6368 Tj 0 -360.7477 Td (5685 #define TDCR $0x03E0/4$ // Timer Divide Configurati\ on) 275.2164 Tj 0 -370.2411 Td (5686 ) 21.8426 Tj 0 -379.7344 Td (5687 volatile uint *lapic; // Initialized in mp.c) 218.4257 Tj 0 -389.2278 Td (5688 ) 21.8426 Tj 0 -398.7211 Td (5689 static void) 69.8962 Tj 0 -408.2145 Td (5690 lapicw$int index, int value$) 144.161 Tj 0 -417.7079 Td (5691 {) 26.2111 Tj 0 -427.2012 Td (5692 lapic[index] = value;) 122.3184 Tj 0 -436.6946 Td (5693 lapic[ID]; // wait for write to finish, by reading) 253.3738 Tj 0 -446.1879 Td (5694 }) 26.2111 Tj 0 -455.6813 Td (5695 ) 21.8426 Tj 0 -465.1747 Td (5696 ) 21.8426 Tj 0 -474.668 Td (5697 ) 21.8426 Tj 0 -484.1614 Td (5698 ) 21.8426 Tj 0 -493.6547 Td (5699 ) 21.8426 Tj 0 -522.1348 Td (Sheet 56) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 64 64 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/lapic.c Page 2) 166.0035 Tj 0 -28.4801 Td (5700 void) 39.3166 Tj 0 -37.9735 Td (5701 lapicinit$int c$) 91.7388 Tj 0 -47.4668 Td (5702 {) 26.2111 Tj 0 -56.9602 Td (5703 if$!lapic$) 74.2647 Tj 0 -66.4535 Td (5704 return;) 69.8962 Tj 0 -75.9469 Td (5705 ) 21.8426 Tj 0 -85.4403 Td (5706 // Enable local APIC; set spurious interrupt vector.) 257.7424 Tj 0 -94.9336 Td (5707 lapicw$SVR, ENABLE | \(T_IRQ0 + IRQ_SPURIOUS$\);) 231.5313 Tj 0 -104.427 Td (5708 ) 21.8426 Tj 0 -113.9203 Td (5709 // The timer repeatedly counts down at bus frequency) 257.7424 Tj 0 -123.4137 Td (5710 // from lapic[TICR] and then issues an interrupt.) 244.6368 Tj 0 -132.9071 Td (5711 // If xv6 cared more about precise timekeeping,) 235.8998 Tj 0 -142.4004 Td (5712 // TICR would be calibrated using an external time sourc\ e.) 283.9534 Tj 0 -151.8938 Td (5713 lapicw$TDCR, X1$;) 104.8443 Tj 0 -161.3871 Td (5714 lapicw$TIMER, PERIODIC | \(T_IRQ0 + IRQ_TIMER$\);) 235.8998 Tj 0 -170.8805 Td (5715 lapicw$TICR, 10000000$;) 131.0554 Tj 0 -180.3739 Td (5716 ) 21.8426 Tj 0 -189.8672 Td (5717 // Disable logical interrupt lines.) 183.4776 Tj 0 -199.3606 Td (5718 lapicw$LINT0, MASKED$;) 126.6869 Tj 0 -208.8539 Td (5719 lapicw$LINT1, MASKED$;) 126.6869 Tj 0 -218.3473 Td (5720 ) 21.8426 Tj 0 -227.8407 Td (5721 // Disable performance counter overflow interrupts) 249.0053 Tj 0 -237.334 Td (5722 // on machines that provide that interrupt entry.) 244.6368 Tj 0 -246.8274 Td (5723 if$\(\(lapic[VER]>>16$ & 0xFF\) >= 4\)) 179.1091 Tj 0 -256.3207 Td (5724 lapicw$PCINT, MASKED$;) 135.4239 Tj 0 -265.8141 Td (5725 ) 21.8426 Tj 0 -275.3075 Td (5726 // Map error interrupt to IRQ_ERROR.) 187.8461 Tj 0 -284.8008 Td (5727 lapicw$ERROR, T_IRQ0 + IRQ_ERROR$;) 179.1091 Tj 0 -294.2942 Td (5728 ) 21.8426 Tj 0 -303.7875 Td (5729 // Clear error status register $requires back-to-back w\ rites$.) 301.4275 Tj 0 -313.2809 Td (5730 lapicw$ESR, 0$;) 96.1073 Tj 0 -322.7743 Td (5731 lapicw$ESR, 0$;) 96.1073 Tj 0 -332.2676 Td (5732 ) 21.8426 Tj 0 -341.761 Td (5733 // Ack any outstanding interrupts.) 179.1091 Tj 0 -351.2543 Td (5734 lapicw$EOI, 0$;) 96.1073 Tj 0 -360.7477 Td (5735 ) 21.8426 Tj 0 -370.2411 Td (5736 // Send an Init Level De-Assert to synchronise arbitrati\ on ID's.) 310.1645 Tj 0 -379.7344 Td (5737 lapicw$ICRHI, 0$;) 104.8443 Tj 0 -389.2278 Td (5738 lapicw$ICRLO, BCAST | INIT | LEVEL$;) 187.8461 Tj 0 -398.7211 Td (5739 while$lapic[ICRLO] & DELIVS$) 152.898 Tj 0 -408.2145 Td (5740 ;) 43.6851 Tj 0 -417.7079 Td (5741 ) 21.8426 Tj 0 -427.2012 Td (5742 // Enable interrupts on the APIC $but not on the proces\ sor$.) 292.6905 Tj 0 -436.6946 Td (5743 lapicw$TPR, 0$;) 96.1073 Tj 0 -446.1879 Td (5744 }) 26.2111 Tj 0 -455.6813 Td (5745 ) 21.8426 Tj 0 -465.1747 Td (5746 ) 21.8426 Tj 0 -474.668 Td (5747 ) 21.8426 Tj 0 -484.1614 Td (5748 ) 21.8426 Tj 0 -493.6547 Td (5749 ) 21.8426 Tj 0 -522.1348 Td (Sheet 57) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/lapic.c Page 3) 166.0035 Tj 0 -28.4801 Td (5750 int) 34.9481 Tj 0 -37.9735 Td (5751 cpunum$void$) 74.2647 Tj 0 -47.4668 Td (5752 {) 26.2111 Tj 0 -56.9602 Td (5753 // Cannot call cpu when interrupts are enabled:) 235.8998 Tj 0 -66.4535 Td (5754 // result not guaranteed to last long enough to be used!) 275.2164 Tj 0 -75.9469 Td (5755 // Would prefer to panic but even printing is chancy her\ e:) 283.9534 Tj 0 -85.4403 Td (5756 // almost everything, including cprintf and panic, calls\ cpu,) 297.059 Tj 0 -94.9336 Td (5757 // often indirectly through acquire and release.) 240.2683 Tj 0 -104.427 Td (5758 if$readeflags\($&FL_IF\){) 131.0554 Tj 0 -113.9203 Td (5759 static int n;) 96.1073 Tj 0 -123.4137 Td (5760 if$n++ == 0$) 91.7388 Tj 0 -132.9071 Td (5761 cprintf$"cpu called from %x with interrupts enabled\ \\n",) 288.322 Tj 0 -142.4004 Td (5762 __builtin_return_address\(0$\);) 183.4776 Tj 0 -151.8938 Td (5763 }) 34.9481 Tj 0 -161.3871 Td (5764 ) 21.8426 Tj 0 -170.8805 Td (5765 if$lapic$) 69.8962 Tj 0 -180.3739 Td (5766 return lapic[ID]>>24;) 131.0554 Tj 0 -189.8672 Td (5767 return 0;) 69.8962 Tj 0 -199.3606 Td (5768 }) 26.2111 Tj 0 -208.8539 Td (5769 ) 21.8426 Tj 0 -218.3473 Td (5770 // Acknowledge interrupt.) 131.0554 Tj 0 -227.8407 Td (5771 void) 39.3166 Tj 0 -237.334 Td (5772 lapiceoi$void$) 83.0018 Tj 0 -246.8274 Td (5773 {) 26.2111 Tj 0 -256.3207 Td (5774 if$lapic$) 69.8962 Tj 0 -265.8141 Td (5775 lapicw$EOI, 0$;) 104.8443 Tj 0 -275.3075 Td (5776 }) 26.2111 Tj 0 -284.8008 Td (5777 ) 21.8426 Tj 0 -294.2942 Td (5778 // Spin for a given number of microseconds.) 209.6887 Tj 0 -303.7875 Td (5779 // On real hardware would want to tune this dynamically.) 266.4794 Tj 0 -313.2809 Td (5780 void) 39.3166 Tj 0 -322.7743 Td (5781 microdelay$int us$) 100.4758 Tj 0 -332.2676 Td (5782 {) 26.2111 Tj 0 -341.761 Td (5783 }) 26.2111 Tj 0 -351.2543 Td (5784 ) 21.8426 Tj 0 -360.7477 Td (5785 ) 21.8426 Tj 0 -370.2411 Td (5786 #define IO_RTC 0x70) 109.2129 Tj 0 -379.7344 Td (5787 ) 21.8426 Tj 0 -389.2278 Td (5788 // Start additional processor running bootstrap code at ad\ dr.) 288.322 Tj 0 -398.7211 Td (5789 // See Appendix B of MultiProcessor Specification.) 240.2683 Tj 0 -408.2145 Td (5790 void) 39.3166 Tj 0 -417.7079 Td (5791 lapicstartap$uchar apicid, uint addr$) 183.4776 Tj 0 -427.2012 Td (5792 {) 26.2111 Tj 0 -436.6946 Td (5793 int i;) 56.7907 Tj 0 -446.1879 Td (5794 ushort *wrv;) 83.0018 Tj 0 -455.6813 Td (5795 ) 21.8426 Tj 0 -465.1747 Td (5796 // "The BSP must initialize CMOS shutdown code to 0AH) 262.1109 Tj 0 -474.668 Td (5797 // and the warm reset vector $DWORD based at 40:67$ to\ point at) 305.796 Tj 0 -484.1614 Td (5798 // the AP startup code prior to the [universal startup a\ lgorithm].") 323.2701 Tj 0 -493.6547 Td (5799 outb$IO_RTC, 0xF$; // offset 0xF is shutdown code) 249.0053 Tj 0 -522.1348 Td (Sheet 57) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 65 65 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/lapic.c Page 4) 166.0035 Tj 0 -28.4801 Td (5800 outb$IO_RTC+1, 0x0A$;) 122.3184 Tj 0 -37.9735 Td (5801 wrv = $ushort*$$0x40<<4 | 0x67$; // Warm reset vect\ or) 266.4794 Tj 0 -47.4668 Td (5802 wrv[0] = 0;) 78.6333 Tj 0 -56.9602 Td (5803 wrv[1] = addr >> 4;) 113.5814 Tj 0 -66.4535 Td (5804 ) 21.8426 Tj 0 -75.9469 Td (5805 // "Universal startup algorithm.") 174.7406 Tj 0 -85.4403 Td (5806 // Send INIT $level-triggered$ interrupt to reset othe\ r CPU.) 292.6905 Tj 0 -94.9336 Td (5807 lapicw$ICRHI, apicid<<24$;) 144.161 Tj 0 -104.427 Td (5808 lapicw$ICRLO, INIT | LEVEL | ASSERT$;) 192.2146 Tj 0 -113.9203 Td (5809 microdelay$200$;) 100.4758 Tj 0 -123.4137 Td (5810 lapicw$ICRLO, INIT | LEVEL$;) 152.898 Tj 0 -132.9071 Td (5811 microdelay$100$; // should be 10ms, but too slow in\ Bochs!) 297.059 Tj 0 -142.4004 Td (5812 ) 21.8426 Tj 0 -151.8938 Td (5813 // Send startup IPI $twice!$ to enter bootstrap code.) 262.1109 Tj 0 -161.3871 Td (5814 // Regular hardware is supposed to only accept a STARTUP) 275.2164 Tj 0 -170.8805 Td (5815 // when it is in the halted state due to an INIT. So th\ e second) 310.1645 Tj 0 -180.3739 Td (5816 // should be ignored, but it is part of the official Int\ el algorithm.) 332.0071 Tj 0 -189.8672 Td (5817 // Bochs complains about the second one. Too bad for Bo\ chs.) 292.6905 Tj 0 -199.3606 Td (5818 for$i = 0; i < 2; i++${) 131.0554 Tj 0 -208.8539 Td (5819 lapicw$ICRHI, apicid<<24$;) 152.898 Tj 0 -218.3473 Td (5820 lapicw$ICRLO, STARTUP | \(addr>>12$\);) 196.5831 Tj 0 -227.8407 Td (5821 microdelay$200$;) 109.2129 Tj 0 -237.334 Td (5822 }) 34.9481 Tj 0 -246.8274 Td (5823 }) 26.2111 Tj 0 -256.3207 Td (5824 ) 21.8426 Tj 0 -265.8141 Td (5825 ) 21.8426 Tj 0 -275.3075 Td (5826 ) 21.8426 Tj 0 -284.8008 Td (5827 ) 21.8426 Tj 0 -294.2942 Td (5828 ) 21.8426 Tj 0 -303.7875 Td (5829 ) 21.8426 Tj 0 -313.2809 Td (5830 ) 21.8426 Tj 0 -322.7743 Td (5831 ) 21.8426 Tj 0 -332.2676 Td (5832 ) 21.8426 Tj 0 -341.761 Td (5833 ) 21.8426 Tj 0 -351.2543 Td (5834 ) 21.8426 Tj 0 -360.7477 Td (5835 ) 21.8426 Tj 0 -370.2411 Td (5836 ) 21.8426 Tj 0 -379.7344 Td (5837 ) 21.8426 Tj 0 -389.2278 Td (5838 ) 21.8426 Tj 0 -398.7211 Td (5839 ) 21.8426 Tj 0 -408.2145 Td (5840 ) 21.8426 Tj 0 -417.7079 Td (5841 ) 21.8426 Tj 0 -427.2012 Td (5842 ) 21.8426 Tj 0 -436.6946 Td (5843 ) 21.8426 Tj 0 -446.1879 Td (5844 ) 21.8426 Tj 0 -455.6813 Td (5845 ) 21.8426 Tj 0 -465.1747 Td (5846 ) 21.8426 Tj 0 -474.668 Td (5847 ) 21.8426 Tj 0 -484.1614 Td (5848 ) 21.8426 Tj 0 -493.6547 Td (5849 ) 21.8426 Tj 0 -522.1348 Td (Sheet 58) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/ioapic.c Page 1) 170.3721 Tj 0 -28.4801 Td (5850 // The I/O APIC manages hardware interrupts for an SMP sys\ tem.) 292.6905 Tj 0 -37.9735 Td (5851 // http://www.intel.com/design/chipsets/datashts/29056601.\ pdf) 288.322 Tj 0 -47.4668 Td (5852 // See also picirq.c.) 113.5814 Tj 0 -56.9602 Td (5853 ) 21.8426 Tj 0 -66.4535 Td (5854 #include "types.h") 100.4758 Tj 0 -75.9469 Td (5855 #include "defs.h") 96.1073 Tj 0 -85.4403 Td (5856 #include "traps.h") 100.4758 Tj 0 -94.9336 Td (5857 ) 21.8426 Tj 0 -104.427 Td (5858 #define IOAPIC 0xFEC00000 // Default physical address o\ f IO APIC) 314.533 Tj 0 -113.9203 Td (5859 ) 21.8426 Tj 0 -123.4137 Td (5860 #define REG_ID 0x00 // Register index: ID) 222.7942 Tj 0 -132.9071 Td (5861 #define REG_VER 0x01 // Register index: version) 244.6368 Tj 0 -142.4004 Td (5862 #define REG_TABLE 0x10 // Redirection table base) 240.2683 Tj 0 -151.8938 Td (5863 ) 21.8426 Tj 0 -161.3871 Td (5864 // The redirection table starts at REG_TABLE and uses) 253.3738 Tj 0 -170.8805 Td (5865 // two registers to configure each interrupt.) 218.4257 Tj 0 -180.3739 Td (5866 // The first $low$ register in a pair contains configura\ tion bits.) 310.1645 Tj 0 -189.8672 Td (5867 // The second $high$ register contains a bitmask telling\ which) 292.6905 Tj 0 -199.3606 Td (5868 // CPUs can serve that interrupt.) 166.0035 Tj 0 -208.8539 Td (5869 #define INT_DISABLED 0x00010000 // Interrupt disabled) 266.4794 Tj 0 -218.3473 Td (5870 #define INT_LEVEL 0x00008000 // Level-triggered $vs\ edge-$) 301.4275 Tj 0 -227.8407 Td (5871 #define INT_ACTIVELOW 0x00002000 // Active low $vs high\ $) 275.2164 Tj 0 -237.334 Td (5872 #define INT_LOGICAL 0x00000800 // Destination is CPU i\ d $vs APIC ID$) 336.3756 Tj 0 -246.8274 Td (5873 ) 21.8426 Tj 0 -256.3207 Td (5874 volatile struct ioapic *ioapic;) 157.2665 Tj 0 -265.8141 Td (5875 ) 21.8426 Tj 0 -275.3075 Td (5876 // IO APIC MMIO structure: write reg, then read or write d\ ata.) 292.6905 Tj 0 -284.8008 Td (5877 struct ioapic {) 87.3703 Tj 0 -294.2942 Td (5878 uint reg;) 69.8962 Tj 0 -303.7875 Td (5879 uint pad[3];) 83.0018 Tj 0 -313.2809 Td (5880 uint data;) 74.2647 Tj 0 -322.7743 Td (5881 };) 30.5796 Tj 0 -332.2676 Td (5882 ) 21.8426 Tj 0 -341.761 Td (5883 static uint) 69.8962 Tj 0 -351.2543 Td (5884 ioapicread$int reg$) 104.8443 Tj 0 -360.7477 Td (5885 {) 26.2111 Tj 0 -370.2411 Td (5886 ioapic->reg = reg;) 109.2129 Tj 0 -379.7344 Td (5887 return ioapic->data;) 117.9499 Tj 0 -389.2278 Td (5888 }) 26.2111 Tj 0 -398.7211 Td (5889 ) 21.8426 Tj 0 -408.2145 Td (5890 static void) 69.8962 Tj 0 -417.7079 Td (5891 ioapicwrite$int reg, uint data$) 157.2665 Tj 0 -427.2012 Td (5892 {) 26.2111 Tj 0 -436.6946 Td (5893 ioapic->reg = reg;) 109.2129 Tj 0 -446.1879 Td (5894 ioapic->data = data;) 117.9499 Tj 0 -455.6813 Td (5895 }) 26.2111 Tj 0 -465.1747 Td (5896 ) 21.8426 Tj 0 -474.668 Td (5897 ) 21.8426 Tj 0 -484.1614 Td (5898 ) 21.8426 Tj 0 -493.6547 Td (5899 ) 21.8426 Tj 0 -522.1348 Td (Sheet 58) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 66 66 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/ioapic.c Page 2) 170.3721 Tj 0 -28.4801 Td (5900 void) 39.3166 Tj 0 -37.9735 Td (5901 ioapicinit$void$) 91.7388 Tj 0 -47.4668 Td (5902 {) 26.2111 Tj 0 -56.9602 Td (5903 int i, id, maxintr;) 113.5814 Tj 0 -66.4535 Td (5904 ) 21.8426 Tj 0 -75.9469 Td (5905 if$!ismp$) 69.8962 Tj 0 -85.4403 Td (5906 return;) 69.8962 Tj 0 -94.9336 Td (5907 ) 21.8426 Tj 0 -104.427 Td (5908 ioapic = $volatile struct ioapic*$IOAPIC;) 209.6887 Tj 0 -113.9203 Td (5909 maxintr = $ioapicread\(REG_VER$ >> 16\) & 0xFF;) 227.1628 Tj 0 -123.4137 Td (5910 id = ioapicread$REG_ID$ >> 24;) 161.635 Tj 0 -132.9071 Td (5911 if$id != ioapicid$) 109.2129 Tj 0 -142.4004 Td (5912 cprintf$"ioapicinit: id isn't equal to ioapicid; not \ a MP\\n"$;) 310.1645 Tj 0 -151.8938 Td (5913 ) 21.8426 Tj 0 -161.3871 Td (5914 // Mark all interrupts edge-triggered, active high, disa\ bled,) 297.059 Tj 0 -170.8805 Td (5915 // and not routed to any CPUs.) 161.635 Tj 0 -180.3739 Td (5916 for$i = 0; i <= maxintr; i++${) 161.635 Tj 0 -189.8672 Td (5917 ioapicwrite$REG_TABLE+2*i, INT_DISABLED | \(T_IRQ0 + \ i$\);) 283.9534 Tj 0 -199.3606 Td (5918 ioapicwrite$REG_TABLE+2*i+1, 0$;) 179.1091 Tj 0 -208.8539 Td (5919 }) 34.9481 Tj 0 -218.3473 Td (5920 }) 26.2111 Tj 0 -227.8407 Td (5921 ) 21.8426 Tj 0 -237.334 Td (5922 void) 39.3166 Tj 0 -246.8274 Td (5923 ioapicenable$int irq, int cpunum$) 166.0035 Tj 0 -256.3207 Td (5924 {) 26.2111 Tj 0 -265.8141 Td (5925 if$!ismp$) 69.8962 Tj 0 -275.3075 Td (5926 return;) 69.8962 Tj 0 -284.8008 Td (5927 ) 21.8426 Tj 0 -294.2942 Td (5928 // Mark interrupt edge-triggered, active high,) 231.5313 Tj 0 -303.7875 Td (5929 // enabled, and routed to the given cpunum,) 218.4257 Tj 0 -313.2809 Td (5930 // which happens to be that cpu's APIC ID.) 214.0572 Tj 0 -322.7743 Td (5931 ioapicwrite$REG_TABLE+2*irq, T_IRQ0 + irq$;) 218.4257 Tj 0 -332.2676 Td (5932 ioapicwrite$REG_TABLE+2*irq+1, cpunum << 24$;) 227.1628 Tj 0 -341.761 Td (5933 }) 26.2111 Tj 0 -351.2543 Td (5934 ) 21.8426 Tj 0 -360.7477 Td (5935 ) 21.8426 Tj 0 -370.2411 Td (5936 ) 21.8426 Tj 0 -379.7344 Td (5937 ) 21.8426 Tj 0 -389.2278 Td (5938 ) 21.8426 Tj 0 -398.7211 Td (5939 ) 21.8426 Tj 0 -408.2145 Td (5940 ) 21.8426 Tj 0 -417.7079 Td (5941 ) 21.8426 Tj 0 -427.2012 Td (5942 ) 21.8426 Tj 0 -436.6946 Td (5943 ) 21.8426 Tj 0 -446.1879 Td (5944 ) 21.8426 Tj 0 -455.6813 Td (5945 ) 21.8426 Tj 0 -465.1747 Td (5946 ) 21.8426 Tj 0 -474.668 Td (5947 ) 21.8426 Tj 0 -484.1614 Td (5948 ) 21.8426 Tj 0 -493.6547 Td (5949 ) 21.8426 Tj 0 -522.1348 Td (Sheet 59) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/picirq.c Page 1) 170.3721 Tj 0 -28.4801 Td (5950 // Intel 8259A programmable interrupt controllers.) 240.2683 Tj 0 -37.9735 Td (5951 ) 21.8426 Tj 0 -47.4668 Td (5952 #include "types.h") 100.4758 Tj 0 -56.9602 Td (5953 #include "x86.h") 91.7388 Tj 0 -66.4535 Td (5954 #include "traps.h") 100.4758 Tj 0 -75.9469 Td (5955 ) 21.8426 Tj 0 -85.4403 Td (5956 // I/O Addresses of the two programmable interrupt control\ lers) 292.6905 Tj 0 -94.9336 Td (5957 #define IO_PIC1 0x20 // Master $IRQs 0-7$) 249.0053 Tj 0 -104.427 Td (5958 #define IO_PIC2 0xA0 // Slave $IRQs 8-15$) 249.0053 Tj 0 -113.9203 Td (5959 ) 21.8426 Tj 0 -123.4137 Td (5960 #define IRQ_SLAVE 2 // IRQ at which slave conn\ ects to master) 336.3756 Tj 0 -132.9071 Td (5961 ) 21.8426 Tj 0 -142.4004 Td (5962 // Current IRQ mask.) 109.2129 Tj 0 -151.8938 Td (5963 // Initial IRQ mask has interrupt 2 enabled $for slave 82\ 59A$.) 292.6905 Tj 0 -161.3871 Td (5964 static ushort irqmask = 0xFFFF & ~$1<> 8$;) 148.5295 Tj 0 -237.334 Td (5972 }) 26.2111 Tj 0 -246.8274 Td (5973 ) 21.8426 Tj 0 -256.3207 Td (5974 void) 39.3166 Tj 0 -265.8141 Td (5975 picenable$int irq$) 100.4758 Tj 0 -275.3075 Td (5976 {) 26.2111 Tj 0 -284.8008 Td (5977 picsetmask\(irqmask & ~\(1<', '?', NO, '*', // 0x30) 270.8479 Tj 0 -322.7743 Td (6181 NO, ' ', NO, NO, NO, NO, NO, NO,) 227.1628 Tj 0 -332.2676 Td (6182 NO, NO, NO, NO, NO, NO, NO, '7', // 0x40) 270.8479 Tj 0 -341.761 Td (6183 '8', '9', '-', '4', '5', '6', '+', '1',) 231.5313 Tj 0 -351.2543 Td (6184 '2', '3', '0', '.', NO, NO, NO, NO, // 0x50) 270.8479 Tj 0 -360.7477 Td (6185 [0x9C] '\\n', // KP_Enter) 157.2665 Tj 0 -370.2411 Td (6186 [0xB5] '/', // KP_Div) 148.5295 Tj 0 -379.7344 Td (6187 [0xC8] KEY_UP, [0xD0] KEY_DN,) 170.3721 Tj 0 -389.2278 Td (6188 [0xC9] KEY_PGUP, [0xD1] KEY_PGDN,) 179.1091 Tj 0 -398.7211 Td (6189 [0xCB] KEY_LF, [0xCD] KEY_RT,) 170.3721 Tj 0 -408.2145 Td (6190 [0x97] KEY_HOME, [0xCF] KEY_END,) 174.7406 Tj 0 -417.7079 Td (6191 [0xD2] KEY_INS, [0xD3] KEY_DEL) 170.3721 Tj 0 -427.2012 Td (6192 };) 30.5796 Tj 0 -436.6946 Td (6193 ) 21.8426 Tj 0 -446.1879 Td (6194 ) 21.8426 Tj 0 -455.6813 Td (6195 ) 21.8426 Tj 0 -465.1747 Td (6196 ) 21.8426 Tj 0 -474.668 Td (6197 ) 21.8426 Tj 0 -484.1614 Td (6198 ) 21.8426 Tj 0 -493.6547 Td (6199 ) 21.8426 Tj 0 -522.1348 Td (Sheet 61) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 69 69 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/kbd.h Page 3) 157.2665 Tj 0 -28.4801 Td (6200 static uchar ctlmap[256] =) 135.4239 Tj 0 -37.9735 Td (6201 {) 26.2111 Tj 0 -47.4668 Td (6202 NO, NO, NO, NO, NO, NO, NO\ , NO,) 318.9016 Tj 0 -56.9602 Td (6203 NO, NO, NO, NO, NO, NO, NO\ , NO,) 318.9016 Tj 0 -66.4535 Td (6204 C$'Q'$, C$'W'$, C$'E'$, C$'R'$, C$'T'$, C\ $'Y'$, C$'U'$, C$'I'$,) 336.3756 Tj 0 -75.9469 Td (6205 C$'O'$, C$'P'$, NO, NO, '\\r', NO, \ C$'A'$, C$'S'$,) 336.3756 Tj 0 -85.4403 Td (6206 C$'D'$, C$'F'$, C$'G'$, C$'H'$, C$'J'$, C\ $'K'$, C$'L'$, NO,) 318.9016 Tj 0 -94.9336 Td (6207 NO, NO, NO, C$'\\\\'$, C$'Z'$, C$'X\ '$, C$'C'$, C$'V'$,) 336.3756 Tj 0 -104.427 Td (6208 C$'B'$, C$'N'$, C$'M'$, NO, NO, C$'/\ '$, NO, NO,) 318.9016 Tj 0 -113.9203 Td (6209 [0x9C] '\\r', // KP_Enter) 157.2665 Tj 0 -123.4137 Td (6210 [0xB5] C$'/'$, // KP_Div) 148.5295 Tj 0 -132.9071 Td (6211 [0xC8] KEY_UP, [0xD0] KEY_DN,) 170.3721 Tj 0 -142.4004 Td (6212 [0xC9] KEY_PGUP, [0xD1] KEY_PGDN,) 179.1091 Tj 0 -151.8938 Td (6213 [0xCB] KEY_LF, [0xCD] KEY_RT,) 170.3721 Tj 0 -161.3871 Td (6214 [0x97] KEY_HOME, [0xCF] KEY_END,) 174.7406 Tj 0 -170.8805 Td (6215 [0xD2] KEY_INS, [0xD3] KEY_DEL) 170.3721 Tj 0 -180.3739 Td (6216 };) 30.5796 Tj 0 -189.8672 Td (6217 ) 21.8426 Tj 0 -199.3606 Td (6218 ) 21.8426 Tj 0 -208.8539 Td (6219 ) 21.8426 Tj 0 -218.3473 Td (6220 ) 21.8426 Tj 0 -227.8407 Td (6221 ) 21.8426 Tj 0 -237.334 Td (6222 ) 21.8426 Tj 0 -246.8274 Td (6223 ) 21.8426 Tj 0 -256.3207 Td (6224 ) 21.8426 Tj 0 -265.8141 Td (6225 ) 21.8426 Tj 0 -275.3075 Td (6226 ) 21.8426 Tj 0 -284.8008 Td (6227 ) 21.8426 Tj 0 -294.2942 Td (6228 ) 21.8426 Tj 0 -303.7875 Td (6229 ) 21.8426 Tj 0 -313.2809 Td (6230 ) 21.8426 Tj 0 -322.7743 Td (6231 ) 21.8426 Tj 0 -332.2676 Td (6232 ) 21.8426 Tj 0 -341.761 Td (6233 ) 21.8426 Tj 0 -351.2543 Td (6234 ) 21.8426 Tj 0 -360.7477 Td (6235 ) 21.8426 Tj 0 -370.2411 Td (6236 ) 21.8426 Tj 0 -379.7344 Td (6237 ) 21.8426 Tj 0 -389.2278 Td (6238 ) 21.8426 Tj 0 -398.7211 Td (6239 ) 21.8426 Tj 0 -408.2145 Td (6240 ) 21.8426 Tj 0 -417.7079 Td (6241 ) 21.8426 Tj 0 -427.2012 Td (6242 ) 21.8426 Tj 0 -436.6946 Td (6243 ) 21.8426 Tj 0 -446.1879 Td (6244 ) 21.8426 Tj 0 -455.6813 Td (6245 ) 21.8426 Tj 0 -465.1747 Td (6246 ) 21.8426 Tj 0 -474.668 Td (6247 ) 21.8426 Tj 0 -484.1614 Td (6248 ) 21.8426 Tj 0 -493.6547 Td (6249 ) 21.8426 Tj 0 -522.1348 Td (Sheet 62) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/kbd.c Page 1) 157.2665 Tj 0 -28.4801 Td (6250 #include "types.h") 100.4758 Tj 0 -37.9735 Td (6251 #include "x86.h") 91.7388 Tj 0 -47.4668 Td (6252 #include "defs.h") 96.1073 Tj 0 -56.9602 Td (6253 #include "kbd.h") 91.7388 Tj 0 -66.4535 Td (6254 ) 21.8426 Tj 0 -75.9469 Td (6255 int) 34.9481 Tj 0 -85.4403 Td (6256 kbdgetc$void$) 78.6333 Tj 0 -94.9336 Td (6257 {) 26.2111 Tj 0 -104.427 Td (6258 static uint shift;) 109.2129 Tj 0 -113.9203 Td (6259 static uchar *charcode[4] = {) 157.2665 Tj 0 -123.4137 Td (6260 normalmap, shiftmap, ctlmap, ctlmap) 192.2146 Tj 0 -132.9071 Td (6261 };) 39.3166 Tj 0 -142.4004 Td (6262 uint st, data, c;) 104.8443 Tj 0 -151.8938 Td (6263 ) 21.8426 Tj 0 -161.3871 Td (6264 st = inb$KBSTATP$;) 109.2129 Tj 0 -170.8805 Td (6265 if$\(st & KBS_DIB$ == 0\)) 131.0554 Tj 0 -180.3739 Td (6266 return -1;) 83.0018 Tj 0 -189.8672 Td (6267 data = inb$KBDATAP$;) 117.9499 Tj 0 -199.3606 Td (6268 ) 21.8426 Tj 0 -208.8539 Td (6269 if$data == 0xE0${) 104.8443 Tj 0 -218.3473 Td (6270 shift |= E0ESC;) 104.8443 Tj 0 -227.8407 Td (6271 return 0;) 78.6333 Tj 0 -237.334 Td (6272 } else if$data & 0x80${) 131.0554 Tj 0 -246.8274 Td (6273 // Key released) 104.8443 Tj 0 -256.3207 Td (6274 data = $shift & E0ESC ? data : data & 0x7F$;) 231.5313 Tj 0 -265.8141 Td (6275 shift &= ~$shiftcode[data] | E0ESC$;) 196.5831 Tj 0 -275.3075 Td (6276 return 0;) 78.6333 Tj 0 -284.8008 Td (6277 } else if$shift & E0ESC${) 139.7925 Tj 0 -294.2942 Td (6278 // Last character was an E0 escape; or with 0x80) 249.0053 Tj 0 -303.7875 Td (6279 data |= 0x80;) 96.1073 Tj 0 -313.2809 Td (6280 shift &= ~E0ESC;) 109.2129 Tj 0 -322.7743 Td (6281 }) 34.9481 Tj 0 -332.2676 Td (6282 ) 21.8426 Tj 0 -341.761 Td (6283 shift |= shiftcode[data];) 139.7925 Tj 0 -351.2543 Td (6284 shift ^= togglecode[data];) 144.161 Tj 0 -360.7477 Td (6285 c = charcode[shift & $CTL | SHIFT$][data];) 214.0572 Tj 0 -370.2411 Td (6286 if$shift & CAPSLOCK${) 122.3184 Tj 0 -379.7344 Td (6287 if$'a' <= c && c <= 'z'$) 144.161 Tj 0 -389.2278 Td (6288 c += 'A' - 'a';) 113.5814 Tj 0 -398.7211 Td (6289 else if$'A' <= c && c <= 'Z'$) 166.0035 Tj 0 -408.2145 Td (6290 c += 'a' - 'A';) 113.5814 Tj 0 -417.7079 Td (6291 }) 34.9481 Tj 0 -427.2012 Td (6292 return c;) 69.8962 Tj 0 -436.6946 Td (6293 }) 26.2111 Tj 0 -446.1879 Td (6294 ) 21.8426 Tj 0 -455.6813 Td (6295 void) 39.3166 Tj 0 -465.1747 Td (6296 kbdintr$void$) 78.6333 Tj 0 -474.668 Td (6297 {) 26.2111 Tj 0 -484.1614 Td (6298 consoleintr$kbdgetc$;) 122.3184 Tj 0 -493.6547 Td (6299 }) 26.2111 Tj 0 -522.1348 Td (Sheet 62) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 70 70 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/console.c Page 1) 174.7406 Tj 0 -28.4801 Td (6300 // Console input and output.) 144.161 Tj 0 -37.9735 Td (6301 // Input is from the keyboard or serial port.) 218.4257 Tj 0 -47.4668 Td (6302 // Output is written to the screen and serial port.) 244.6368 Tj 0 -56.9602 Td (6303 ) 21.8426 Tj 0 -66.4535 Td (6304 #include "types.h") 100.4758 Tj 0 -75.9469 Td (6305 #include "defs.h") 96.1073 Tj 0 -85.4403 Td (6306 #include "param.h") 100.4758 Tj 0 -94.9336 Td (6307 #include "traps.h") 100.4758 Tj 0 -104.427 Td (6308 #include "spinlock.h") 113.5814 Tj 0 -113.9203 Td (6309 #include "fs.h") 87.3703 Tj 0 -123.4137 Td (6310 #include "file.h") 96.1073 Tj 0 -132.9071 Td (6311 #include "mmu.h") 91.7388 Tj 0 -142.4004 Td (6312 #include "proc.h") 96.1073 Tj 0 -151.8938 Td (6313 #include "x86.h") 91.7388 Tj 0 -161.3871 Td (6314 ) 21.8426 Tj 0 -170.8805 Td (6315 static void consputc$int$;) 135.4239 Tj 0 -180.3739 Td (6316 ) 21.8426 Tj 0 -189.8672 Td (6317 static int panicked = 0;) 126.6869 Tj 0 -199.3606 Td (6318 ) 21.8426 Tj 0 -208.8539 Td (6319 static struct {) 87.3703 Tj 0 -218.3473 Td (6320 ) 21.8426 Tj -1504.73 TJm (struct spinlock lock;) 91.7388 Tj 0 -227.8407 Td (6321 ) 21.8426 Tj -1504.73 TJm (int locking;) 52.4222 Tj 0 -237.334 Td (6322 } cons;) 52.4222 Tj 0 -246.8274 Td (6323 ) 21.8426 Tj 0 -256.3207 Td (6324 static void) 69.8962 Tj 0 -265.8141 Td (6325 printint$int xx, int base, int sgn$) 174.7406 Tj 0 -275.3075 Td (6326 {) 26.2111 Tj 0 -284.8008 Td (6327 static char digits[] = "0123456789abcdef";) 214.0572 Tj 0 -294.2942 Td (6328 char buf[16];) 87.3703 Tj 0 -303.7875 Td (6329 int i = 0, neg = 0;) 113.5814 Tj 0 -313.2809 Td (6330 uint x;) 61.1592 Tj 0 -322.7743 Td (6331 ) 21.8426 Tj 0 -332.2676 Td (6332 if$sgn && xx < 0${) 109.2129 Tj 0 -341.761 Td (6333 neg = 1;) 74.2647 Tj 0 -351.2543 Td (6334 x = -xx;) 74.2647 Tj 0 -360.7477 Td (6335 } else) 56.7907 Tj 0 -370.2411 Td (6336 x = xx;) 69.8962 Tj 0 -379.7344 Td (6337 ) 21.8426 Tj 0 -389.2278 Td (6338 do{) 43.6851 Tj 0 -398.7211 Td (6339 buf[i++] = digits[x % base];) 161.635 Tj 0 -408.2145 Td (6340 }while$\(x /= base$ != 0\);) 139.7925 Tj 0 -417.7079 Td (6341 if$neg$) 61.1592 Tj 0 -427.2012 Td (6342 buf[i++] = '-';) 104.8443 Tj 0 -436.6946 Td (6343 ) 21.8426 Tj 0 -446.1879 Td (6344 while$--i >= 0$) 96.1073 Tj 0 -455.6813 Td (6345 consputc$buf[i]$;) 113.5814 Tj 0 -465.1747 Td (6346 }) 26.2111 Tj 0 -474.668 Td (6347 ) 21.8426 Tj 0 -484.1614 Td (6348 ) 21.8426 Tj 0 -493.6547 Td (6349 ) 21.8426 Tj 0 -522.1348 Td (Sheet 63) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/console.c Page 2) 174.7406 Tj 0 -28.4801 Td (6350 // Print to the console. only understands %d, %x, %p, %s.) 270.8479 Tj 0 -37.9735 Td (6351 void) 39.3166 Tj 0 -47.4668 Td (6352 cprintf$char *fmt, ...$) 122.3184 Tj 0 -56.9602 Td (6353 {) 26.2111 Tj 0 -66.4535 Td (6354 int i, c, state, locking;) 139.7925 Tj 0 -75.9469 Td (6355 uint *argp;) 78.6333 Tj 0 -85.4403 Td (6356 char *s;) 65.5277 Tj 0 -94.9336 Td (6357 ) 21.8426 Tj 0 -104.427 Td (6358 locking = cons.locking;) 131.0554 Tj 0 -113.9203 Td (6359 if$locking$) 78.6333 Tj 0 -123.4137 Td (6360 acquire$&cons.lock$;) 126.6869 Tj 0 -132.9071 Td (6361 ) 21.8426 Tj 0 -142.4004 Td (6362 argp = $uint*$$void*$$&fmt + 1$;) 170.3721 Tj 0 -151.8938 Td (6363 state = 0;) 74.2647 Tj 0 -161.3871 Td (6364 for$i = 0; \(c = fmt[i] & 0xff$ != 0; i++\){) 214.0572 Tj 0 -170.8805 Td (6365 if$c != '%'${) 96.1073 Tj 0 -180.3739 Td (6366 consputc$c$;) 100.4758 Tj 0 -189.8672 Td (6367 continue;) 87.3703 Tj 0 -199.3606 Td (6368 }) 43.6851 Tj 0 -208.8539 Td (6369 c = fmt[++i] & 0xff;) 126.6869 Tj 0 -218.3473 Td (6370 if$c == 0$) 83.0018 Tj 0 -227.8407 Td (6371 break;) 74.2647 Tj 0 -237.334 Td (6372 switch$c${) 83.0018 Tj 0 -246.8274 Td (6373 case 'd':) 78.6333 Tj 0 -256.3207 Td (6374 printint$*argp++, 10, 1$;) 157.2665 Tj 0 -265.8141 Td (6375 break;) 74.2647 Tj 0 -275.3075 Td (6376 case 'x':) 78.6333 Tj 0 -284.8008 Td (6377 case 'p':) 78.6333 Tj 0 -294.2942 Td (6378 printint$*argp++, 16, 0$;) 157.2665 Tj 0 -303.7875 Td (6379 break;) 74.2647 Tj 0 -313.2809 Td (6380 case 's':) 78.6333 Tj 0 -322.7743 Td (6381 if$\(s = \(char*$*argp++\) == 0\)) 174.7406 Tj 0 -332.2676 Td (6382 s = "$null$";) 113.5814 Tj 0 -341.761 Td (6383 for$; *s; s++$) 109.2129 Tj 0 -351.2543 Td (6384 consputc$*s$;) 113.5814 Tj 0 -360.7477 Td (6385 break;) 74.2647 Tj 0 -370.2411 Td (6386 case '%':) 78.6333 Tj 0 -379.7344 Td (6387 consputc$'%'$;) 109.2129 Tj 0 -389.2278 Td (6388 break;) 74.2647 Tj 0 -398.7211 Td (6389 default:) 74.2647 Tj 0 -408.2145 Td (6390 // Print unknown % sequence to draw attention.) 249.0053 Tj 0 -417.7079 Td (6391 consputc$'%'$;) 109.2129 Tj 0 -427.2012 Td (6392 consputc$c$;) 100.4758 Tj 0 -436.6946 Td (6393 break;) 74.2647 Tj 0 -446.1879 Td (6394 }) 43.6851 Tj 0 -455.6813 Td (6395 }) 34.9481 Tj 0 -465.1747 Td (6396 ) 21.8426 Tj 0 -474.668 Td (6397 if$locking$) 78.6333 Tj 0 -484.1614 Td (6398 release$&cons.lock$;) 126.6869 Tj 0 -493.6547 Td (6399 }) 26.2111 Tj 0 -522.1348 Td (Sheet 63) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 71 71 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/console.c Page 3) 174.7406 Tj 0 -28.4801 Td (6400 void) 39.3166 Tj 0 -37.9735 Td (6401 panic$char *s$) 83.0018 Tj 0 -47.4668 Td (6402 {) 26.2111 Tj 0 -56.9602 Td (6403 int i;) 56.7907 Tj 0 -66.4535 Td (6404 uint pcs[10];) 87.3703 Tj 0 -75.9469 Td (6405 ) 21.8426 Tj 0 -85.4403 Td (6406 cli;) 56.7907 Tj 0 -94.9336 Td (6407 cons.locking = 0;) 104.8443 Tj 0 -104.427 Td (6408 cprintf$"cpu%d: panic: ", cpu->id$;) 183.4776 Tj 0 -113.9203 Td (6409 cprintf$s$;) 78.6333 Tj 0 -123.4137 Td (6410 cprintf$"\\n"$;) 91.7388 Tj 0 -132.9071 Td (6411 getcallerpcs$&s, pcs$;) 126.6869 Tj 0 -142.4004 Td (6412 for$i=0; i<10; i++$) 113.5814 Tj 0 -151.8938 Td (6413 cprintf$" %p", pcs[i]$;) 139.7925 Tj 0 -161.3871 Td (6414 panicked = 1; // freeze other CPU) 174.7406 Tj 0 -170.8805 Td (6415 for$;;$) 61.1592 Tj 0 -180.3739 Td (6416 ;) 43.6851 Tj 0 -189.8672 Td (6417 }) 26.2111 Tj 0 -199.3606 Td (6418 ) 21.8426 Tj 0 -208.8539 Td (6419 ) 21.8426 Tj 0 -218.3473 Td (6420 ) 21.8426 Tj 0 -227.8407 Td (6421 ) 21.8426 Tj 0 -237.334 Td (6422 ) 21.8426 Tj 0 -246.8274 Td (6423 ) 21.8426 Tj 0 -256.3207 Td (6424 ) 21.8426 Tj 0 -265.8141 Td (6425 ) 21.8426 Tj 0 -275.3075 Td (6426 ) 21.8426 Tj 0 -284.8008 Td (6427 ) 21.8426 Tj 0 -294.2942 Td (6428 ) 21.8426 Tj 0 -303.7875 Td (6429 ) 21.8426 Tj 0 -313.2809 Td (6430 ) 21.8426 Tj 0 -322.7743 Td (6431 ) 21.8426 Tj 0 -332.2676 Td (6432 ) 21.8426 Tj 0 -341.761 Td (6433 ) 21.8426 Tj 0 -351.2543 Td (6434 ) 21.8426 Tj 0 -360.7477 Td (6435 ) 21.8426 Tj 0 -370.2411 Td (6436 ) 21.8426 Tj 0 -379.7344 Td (6437 ) 21.8426 Tj 0 -389.2278 Td (6438 ) 21.8426 Tj 0 -398.7211 Td (6439 ) 21.8426 Tj 0 -408.2145 Td (6440 ) 21.8426 Tj 0 -417.7079 Td (6441 ) 21.8426 Tj 0 -427.2012 Td (6442 ) 21.8426 Tj 0 -436.6946 Td (6443 ) 21.8426 Tj 0 -446.1879 Td (6444 ) 21.8426 Tj 0 -455.6813 Td (6445 ) 21.8426 Tj 0 -465.1747 Td (6446 ) 21.8426 Tj 0 -474.668 Td (6447 ) 21.8426 Tj 0 -484.1614 Td (6448 ) 21.8426 Tj 0 -493.6547 Td (6449 ) 21.8426 Tj 0 -522.1348 Td (Sheet 64) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/console.c Page 4) 174.7406 Tj 0 -28.4801 Td (6450 #define BACKSPACE 0x100) 122.3184 Tj 0 -37.9735 Td (6451 #define CRTPORT 0x3d4) 113.5814 Tj 0 -47.4668 Td (6452 static ushort *crt = $ushort*$0xb8000; // CGA memory) 253.3738 Tj 0 -56.9602 Td (6453 ) 21.8426 Tj 0 -66.4535 Td (6454 static void) 69.8962 Tj 0 -75.9469 Td (6455 cgaputc$int c$) 83.0018 Tj 0 -85.4403 Td (6456 {) 26.2111 Tj 0 -94.9336 Td (6457 int pos;) 65.5277 Tj 0 -104.427 Td (6458 ) 21.8426 Tj 0 -113.9203 Td (6459 // Cursor position: col + 80*row.) 174.7406 Tj 0 -123.4137 Td (6460 outb$CRTPORT, 14$;) 109.2129 Tj 0 -132.9071 Td (6461 pos = inb$CRTPORT+1$ << 8;) 144.161 Tj 0 -142.4004 Td (6462 outb$CRTPORT, 15$;) 109.2129 Tj 0 -151.8938 Td (6463 pos |= inb$CRTPORT+1$;) 126.6869 Tj 0 -161.3871 Td (6464 ) 21.8426 Tj 0 -170.8805 Td (6465 if$c == '\\n'$) 87.3703 Tj 0 -180.3739 Td (6466 pos += 80 - pos%80;) 122.3184 Tj 0 -189.8672 Td (6467 else if$c == BACKSPACE${) 135.4239 Tj 0 -199.3606 Td (6468 if$pos > 0$) 87.3703 Tj 0 -208.8539 Td (6469 crt[--pos] = ' ' | 0x0700;) 161.635 Tj 0 -218.3473 Td (6470 } else) 56.7907 Tj 0 -227.8407 Td (6471 crt[pos++] = $c&0xff$ | 0x0700; // black on white) 257.7424 Tj 0 -237.334 Td (6472 ) 21.8426 Tj 0 -246.8274 Td (6473 if$\(pos/80$ >= 24\){ // Scroll up.) 179.1091 Tj 0 -256.3207 Td (6474 memmove$crt, crt+80, sizeof\(crt[0]$*23*80\);) 227.1628 Tj 0 -265.8141 Td (6475 pos -= 80;) 83.0018 Tj 0 -275.3075 Td (6476 memset$crt+pos, 0, sizeof\(crt[0]$*$24*80 - pos$\)\ ;) 253.3738 Tj 0 -284.8008 Td (6477 }) 34.9481 Tj 0 -294.2942 Td (6478 ) 21.8426 Tj 0 -303.7875 Td (6479 outb$CRTPORT, 14$;) 109.2129 Tj 0 -313.2809 Td (6480 outb$CRTPORT+1, pos>>8$;) 135.4239 Tj 0 -322.7743 Td (6481 outb$CRTPORT, 15$;) 109.2129 Tj 0 -332.2676 Td (6482 outb$CRTPORT+1, pos$;) 122.3184 Tj 0 -341.761 Td (6483 crt[pos] = ' ' | 0x0700;) 135.4239 Tj 0 -351.2543 Td (6484 }) 26.2111 Tj 0 -360.7477 Td (6485 ) 21.8426 Tj 0 -370.2411 Td (6486 void) 39.3166 Tj 0 -379.7344 Td (6487 consputc$int c$) 87.3703 Tj 0 -389.2278 Td (6488 {) 26.2111 Tj 0 -398.7211 Td (6489 if$panicked${) 87.3703 Tj 0 -408.2145 Td (6490 cli;) 65.5277 Tj 0 -417.7079 Td (6491 for$;;$) 69.8962 Tj 0 -427.2012 Td (6492 ;) 52.4222 Tj 0 -436.6946 Td (6493 }) 34.9481 Tj 0 -446.1879 Td (6494 ) 21.8426 Tj 0 -455.6813 Td (6495 uartputc$c$;) 83.0018 Tj 0 -465.1747 Td (6496 cgaputc$c$;) 78.6333 Tj 0 -474.668 Td (6497 }) 26.2111 Tj 0 -484.1614 Td (6498 ) 21.8426 Tj 0 -493.6547 Td (6499 ) 21.8426 Tj 0 -522.1348 Td (Sheet 64) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 72 72 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/console.c Page 5) 174.7406 Tj 0 -28.4801 Td (6500 #define INPUT_BUF 128) 113.5814 Tj 0 -37.9735 Td (6501 struct {) 56.7907 Tj 0 -47.4668 Td (6502 struct spinlock lock;) 122.3184 Tj 0 -56.9602 Td (6503 char buf[INPUT_BUF];) 117.9499 Tj 0 -66.4535 Td (6504 uint r; // Read index) 126.6869 Tj 0 -75.9469 Td (6505 uint w; // Write index) 131.0554 Tj 0 -85.4403 Td (6506 uint e; // Edit index) 126.6869 Tj 0 -94.9336 Td (6507 } input;) 56.7907 Tj 0 -104.427 Td (6508 ) 21.8426 Tj 0 -113.9203 Td (6509 #define C$x$ $\(x$-'@'\) // Control-x) 183.4776 Tj 0 -123.4137 Td (6510 ) 21.8426 Tj 0 -132.9071 Td (6511 void) 39.3166 Tj 0 -142.4004 Td (6512 consoleintr$int \(*getc$$void$\)) 152.898 Tj 0 -151.8938 Td (6513 {) 26.2111 Tj 0 -161.3871 Td (6514 int c;) 56.7907 Tj 0 -170.8805 Td (6515 ) 21.8426 Tj 0 -180.3739 Td (6516 acquire$&input.lock$;) 122.3184 Tj 0 -189.8672 Td (6517 while$\(c = getc\($\) >= 0\){) 139.7925 Tj 0 -199.3606 Td (6518 switch$c${) 83.0018 Tj 0 -208.8539 Td (6519 case C$'P'$: // Process listing.) 183.4776 Tj 0 -218.3473 Td (6520 procdump;) 96.1073 Tj 0 -227.8407 Td (6521 break;) 74.2647 Tj 0 -237.334 Td (6522 case C$'U'$: // Kill line.) 157.2665 Tj 0 -246.8274 Td (6523 while$input.e != input.w &&) 166.0035 Tj 0 -256.3207 Td (6524 input.buf[\(input.e-1$ % INPUT_BUF] != '\\n'\)\ {) 266.4794 Tj 0 -265.8141 Td (6525 input.e--;) 100.4758 Tj 0 -275.3075 Td (6526 consputc$BACKSPACE$;) 144.161 Tj 0 -284.8008 Td (6527 }) 52.4222 Tj 0 -294.2942 Td (6528 break;) 74.2647 Tj 0 -303.7875 Td (6529 case C$'H'$: // Backspace) 152.898 Tj 0 -313.2809 Td (6530 if$input.e != input.w${) 148.5295 Tj 0 -322.7743 Td (6531 input.e--;) 100.4758 Tj 0 -332.2676 Td (6532 consputc$BACKSPACE$;) 144.161 Tj 0 -341.761 Td (6533 }) 52.4222 Tj 0 -351.2543 Td (6534 break;) 74.2647 Tj 0 -360.7477 Td (6535 default:) 74.2647 Tj 0 -370.2411 Td (6536 if$c != 0 && input.e-input.r < INPUT_BUF${) 231.5313 Tj 0 -379.7344 Td (6537 input.buf[input.e++ % INPUT_BUF] = c;) 218.4257 Tj 0 -389.2278 Td (6538 consputc$c$;) 109.2129 Tj 0 -398.7211 Td (6539 if$c == '\\n' || c == C\('D'$ || input.e == inpu\ t.r+INPUT_BUF\){) 323.2701 Tj 0 -408.2145 Td (6540 input.w = input.e;) 144.161 Tj 0 -417.7079 Td (6541 wakeup$&input.r$;) 139.7925 Tj 0 -427.2012 Td (6542 }) 61.1592 Tj 0 -436.6946 Td (6543 }) 52.4222 Tj 0 -446.1879 Td (6544 break;) 74.2647 Tj 0 -455.6813 Td (6545 }) 43.6851 Tj 0 -465.1747 Td (6546 }) 34.9481 Tj 0 -474.668 Td (6547 release$&input.lock$;) 122.3184 Tj 0 -484.1614 Td (6548 }) 26.2111 Tj 0 -493.6547 Td (6549 ) 21.8426 Tj 0 -522.1348 Td (Sheet 65) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/console.c Page 6) 174.7406 Tj 0 -28.4801 Td (6550 int) 34.9481 Tj 0 -37.9735 Td (6551 consoleread$struct inode *ip, char *dst, int n$) 227.1628 Tj 0 -47.4668 Td (6552 {) 26.2111 Tj 0 -56.9602 Td (6553 uint target;) 83.0018 Tj 0 -66.4535 Td (6554 int c;) 56.7907 Tj 0 -75.9469 Td (6555 ) 21.8426 Tj 0 -85.4403 Td (6556 iunlock$ip$;) 83.0018 Tj 0 -94.9336 Td (6557 target = n;) 78.6333 Tj 0 -104.427 Td (6558 acquire$&input.lock$;) 122.3184 Tj 0 -113.9203 Td (6559 while$n > 0${) 87.3703 Tj 0 -123.4137 Td (6560 while$input.r == input.w${) 152.898 Tj 0 -132.9071 Td (6561 if$proc->killed${) 122.3184 Tj 0 -142.4004 Td (6562 release$&input.lock$;) 148.5295 Tj 0 -151.8938 Td (6563 ilock$ip$;) 100.4758 Tj 0 -161.3871 Td (6564 return -1;) 100.4758 Tj 0 -170.8805 Td (6565 }) 52.4222 Tj 0 -180.3739 Td (6566 sleep$&input.r, &input.lock$;) 174.7406 Tj 0 -189.8672 Td (6567 }) 43.6851 Tj 0 -199.3606 Td (6568 c = input.buf[input.r++ % INPUT_BUF];) 200.9517 Tj 0 -208.8539 Td (6569 if$c == C\('D'$\){ // EOF) 144.161 Tj 0 -218.3473 Td (6570 if$n < target${) 113.5814 Tj 0 -227.8407 Td (6571 // Save ^D for next time, to make sure) 222.7942 Tj 0 -237.334 Td (6572 // caller gets a 0-byte result.) 192.2146 Tj 0 -246.8274 Td (6573 input.r--;) 100.4758 Tj 0 -256.3207 Td (6574 }) 52.4222 Tj 0 -265.8141 Td (6575 break;) 74.2647 Tj 0 -275.3075 Td (6576 }) 43.6851 Tj 0 -284.8008 Td (6577 *dst++ = c;) 87.3703 Tj 0 -294.2942 Td (6578 --n;) 56.7907 Tj 0 -303.7875 Td (6579 if$c == '\\n'$) 96.1073 Tj 0 -313.2809 Td (6580 break;) 74.2647 Tj 0 -322.7743 Td (6581 }) 34.9481 Tj 0 -332.2676 Td (6582 release$&input.lock$;) 122.3184 Tj 0 -341.761 Td (6583 ilock$ip$;) 74.2647 Tj 0 -351.2543 Td (6584 ) 21.8426 Tj 0 -360.7477 Td (6585 return target - n;) 109.2129 Tj 0 -370.2411 Td (6586 }) 26.2111 Tj 0 -379.7344 Td (6587 ) 21.8426 Tj 0 -389.2278 Td (6588 ) 21.8426 Tj 0 -398.7211 Td (6589 ) 21.8426 Tj 0 -408.2145 Td (6590 ) 21.8426 Tj 0 -417.7079 Td (6591 ) 21.8426 Tj 0 -427.2012 Td (6592 ) 21.8426 Tj 0 -436.6946 Td (6593 ) 21.8426 Tj 0 -446.1879 Td (6594 ) 21.8426 Tj 0 -455.6813 Td (6595 ) 21.8426 Tj 0 -465.1747 Td (6596 ) 21.8426 Tj 0 -474.668 Td (6597 ) 21.8426 Tj 0 -484.1614 Td (6598 ) 21.8426 Tj 0 -493.6547 Td (6599 ) 21.8426 Tj 0 -522.1348 Td (Sheet 65) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 73 73 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/console.c Page 7) 174.7406 Tj 0 -28.4801 Td (6600 int) 34.9481 Tj 0 -37.9735 Td (6601 consolewrite$struct inode *ip, char *buf, int n$) 231.5313 Tj 0 -47.4668 Td (6602 {) 26.2111 Tj 0 -56.9602 Td (6603 int i;) 56.7907 Tj 0 -66.4535 Td (6604 ) 21.8426 Tj 0 -75.9469 Td (6605 iunlock$ip$;) 83.0018 Tj 0 -85.4403 Td (6606 acquire$&cons.lock$;) 117.9499 Tj 0 -94.9336 Td (6607 for$i = 0; i < n; i++$) 126.6869 Tj 0 -104.427 Td (6608 consputc$buf[i] & 0xff$;) 144.161 Tj 0 -113.9203 Td (6609 release$&cons.lock$;) 117.9499 Tj 0 -123.4137 Td (6610 ilock$ip$;) 74.2647 Tj 0 -132.9071 Td (6611 ) 21.8426 Tj 0 -142.4004 Td (6612 return n;) 69.8962 Tj 0 -151.8938 Td (6613 }) 26.2111 Tj 0 -161.3871 Td (6614 ) 21.8426 Tj 0 -170.8805 Td (6615 void) 39.3166 Tj 0 -180.3739 Td (6616 consoleinit$void$) 96.1073 Tj 0 -189.8672 Td (6617 {) 26.2111 Tj 0 -199.3606 Td (6618 initlock$&cons.lock, "console"$;) 170.3721 Tj 0 -208.8539 Td (6619 initlock$&input.lock, "input"$;) 166.0035 Tj 0 -218.3473 Td (6620 ) 21.8426 Tj 0 -227.8407 Td (6621 devsw[CONSOLE].write = consolewrite;) 187.8461 Tj 0 -237.334 Td (6622 devsw[CONSOLE].read = consoleread;) 179.1091 Tj 0 -246.8274 Td (6623 cons.locking = 1;) 104.8443 Tj 0 -256.3207 Td (6624 ) 21.8426 Tj 0 -265.8141 Td (6625 picenable$IRQ_KBD$;) 113.5814 Tj 0 -275.3075 Td (6626 ioapicenable$IRQ_KBD, 0$;) 139.7925 Tj 0 -284.8008 Td (6627 }) 26.2111 Tj 0 -294.2942 Td (6628 ) 21.8426 Tj 0 -303.7875 Td (6629 ) 21.8426 Tj 0 -313.2809 Td (6630 ) 21.8426 Tj 0 -322.7743 Td (6631 ) 21.8426 Tj 0 -332.2676 Td (6632 ) 21.8426 Tj 0 -341.761 Td (6633 ) 21.8426 Tj 0 -351.2543 Td (6634 ) 21.8426 Tj 0 -360.7477 Td (6635 ) 21.8426 Tj 0 -370.2411 Td (6636 ) 21.8426 Tj 0 -379.7344 Td (6637 ) 21.8426 Tj 0 -389.2278 Td (6638 ) 21.8426 Tj 0 -398.7211 Td (6639 ) 21.8426 Tj 0 -408.2145 Td (6640 ) 21.8426 Tj 0 -417.7079 Td (6641 ) 21.8426 Tj 0 -427.2012 Td (6642 ) 21.8426 Tj 0 -436.6946 Td (6643 ) 21.8426 Tj 0 -446.1879 Td (6644 ) 21.8426 Tj 0 -455.6813 Td (6645 ) 21.8426 Tj 0 -465.1747 Td (6646 ) 21.8426 Tj 0 -474.668 Td (6647 ) 21.8426 Tj 0 -484.1614 Td (6648 ) 21.8426 Tj 0 -493.6547 Td (6649 ) 21.8426 Tj 0 -522.1348 Td (Sheet 66) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/timer.c Page 1) 166.0035 Tj 0 -28.4801 Td (6650 // Intel 8253/8254/82C54 Programmable Interval Timer $PIT\ $.) 279.5849 Tj 0 -37.9735 Td (6651 // Only used on uniprocessors;) 152.898 Tj 0 -47.4668 Td (6652 // SMP machines use the local APIC timer.) 200.9517 Tj 0 -56.9602 Td (6653 ) 21.8426 Tj 0 -66.4535 Td (6654 #include "types.h") 100.4758 Tj 0 -75.9469 Td (6655 #include "defs.h") 96.1073 Tj 0 -85.4403 Td (6656 #include "traps.h") 100.4758 Tj 0 -94.9336 Td (6657 #include "x86.h") 91.7388 Tj 0 -104.427 Td (6658 ) 21.8426 Tj 0 -113.9203 Td (6659 #define IO_TIMER1 0x040 // 8253 Timer #1) 266.4794 Tj 0 -123.4137 Td (6660 ) 21.8426 Tj 0 -132.9071 Td (6661 // Frequency of all three count-down timers;) 214.0572 Tj 0 -142.4004 Td (6662 // $TIMER_FREQ/freq$ is the appropriate count) 218.4257 Tj 0 -151.8938 Td (6663 // to generate a frequency of freq Hz.) 187.8461 Tj 0 -161.3871 Td (6664 ) 21.8426 Tj 0 -170.8805 Td (6665 #define TIMER_FREQ 1193182) 157.2665 Tj 0 -180.3739 Td (6666 #define TIMER_DIV$x$ $\(TIMER_FREQ+\(x$/2\)/$x$\)) 231.5313 Tj 0 -189.8672 Td (6667 ) 21.8426 Tj 0 -199.3606 Td (6668 #define TIMER_MODE $IO_TIMER1 + 3$ // timer mode po\ rt) 275.2164 Tj 0 -208.8539 Td (6669 #define TIMER_SEL0 0x00 // select counter 0) 244.6368 Tj 0 -218.3473 Td (6670 #define TIMER_RATEGEN 0x04 // mode 2, rate generator) 270.8479 Tj 0 -227.8407 Td (6671 #define TIMER_16BIT 0x30 // r/w counter 16 bits, LS\ B first) 305.796 Tj 0 -237.334 Td (6672 ) 21.8426 Tj 0 -246.8274 Td (6673 void) 39.3166 Tj 0 -256.3207 Td (6674 timerinit$void$) 87.3703 Tj 0 -265.8141 Td (6675 {) 26.2111 Tj 0 -275.3075 Td (6676 // Interrupt 100 times/sec.) 148.5295 Tj 0 -284.8008 Td (6677 outb$TIMER_MODE, TIMER_SEL0 | TIMER_RATEGEN | TIMER_16B\ IT$;) 288.322 Tj 0 -294.2942 Td (6678 outb$IO_TIMER1, TIMER_DIV\(100$ % 256\);) 196.5831 Tj 0 -303.7875 Td (6679 outb$IO_TIMER1, TIMER_DIV\(100$ / 256\);) 196.5831 Tj 0 -313.2809 Td (6680 picenable$IRQ_TIMER$;) 122.3184 Tj 0 -322.7743 Td (6681 }) 26.2111 Tj 0 -332.2676 Td (6682 ) 21.8426 Tj 0 -341.761 Td (6683 ) 21.8426 Tj 0 -351.2543 Td (6684 ) 21.8426 Tj 0 -360.7477 Td (6685 ) 21.8426 Tj 0 -370.2411 Td (6686 ) 21.8426 Tj 0 -379.7344 Td (6687 ) 21.8426 Tj 0 -389.2278 Td (6688 ) 21.8426 Tj 0 -398.7211 Td (6689 ) 21.8426 Tj 0 -408.2145 Td (6690 ) 21.8426 Tj 0 -417.7079 Td (6691 ) 21.8426 Tj 0 -427.2012 Td (6692 ) 21.8426 Tj 0 -436.6946 Td (6693 ) 21.8426 Tj 0 -446.1879 Td (6694 ) 21.8426 Tj 0 -455.6813 Td (6695 ) 21.8426 Tj 0 -465.1747 Td (6696 ) 21.8426 Tj 0 -474.668 Td (6697 ) 21.8426 Tj 0 -484.1614 Td (6698 ) 21.8426 Tj 0 -493.6547 Td (6699 ) 21.8426 Tj 0 -522.1348 Td (Sheet 66) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 74 74 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/initcode.S Page 1) 179.1091 Tj 0 -28.4801 Td (6700 # Initial process execs /init.) 152.898 Tj 0 -37.9735 Td (6701 ) 21.8426 Tj 0 -47.4668 Td (6702 #include "syscall.h") 109.2129 Tj 0 -56.9602 Td (6703 #include "traps.h") 100.4758 Tj 0 -66.4535 Td (6704 ) 21.8426 Tj 0 -75.9469 Td (6705 # exec$init, argv$) 100.4758 Tj 0 -85.4403 Td (6706 .globl start) 74.2647 Tj 0 -94.9336 Td (6707 start:) 48.0537 Tj 0 -104.427 Td (6708 pushl $argv) 78.6333 Tj 0 -113.9203 Td (6709 pushl $init) 78.6333 Tj 0 -123.4137 Td (6710 pushl $0 // where caller pc would be) 192.2146 Tj 0 -132.9071 Td (6711 movl $SYS_exec, %eax) 117.9499 Tj 0 -142.4004 Td (6712 int $T_SYSCALL) 91.7388 Tj 0 -151.8938 Td (6713 ) 21.8426 Tj 0 -161.3871 Td (6714 # for$;;$ exit;) 96.1073 Tj 0 -170.8805 Td (6715 exit:) 43.6851 Tj 0 -180.3739 Td (6716 movl $SYS_exit, %eax) 117.9499 Tj 0 -189.8672 Td (6717 int $T_SYSCALL) 91.7388 Tj 0 -199.3606 Td (6718 jmp exit) 65.5277 Tj 0 -208.8539 Td (6719 ) 21.8426 Tj 0 -218.3473 Td (6720 # char init[] = "/init\\0";) 135.4239 Tj 0 -227.8407 Td (6721 init:) 43.6851 Tj 0 -237.334 Td (6722 .string "/init\\0") 104.8443 Tj 0 -246.8274 Td (6723 ) 21.8426 Tj 0 -256.3207 Td (6724 # char *argv[] = { init, 0 };) 148.5295 Tj 0 -265.8141 Td (6725 .p2align 2) 65.5277 Tj 0 -275.3075 Td (6726 argv:) 43.6851 Tj 0 -284.8008 Td (6727 .long init) 74.2647 Tj 0 -294.2942 Td (6728 .long 0) 61.1592 Tj 0 -303.7875 Td (6729 ) 21.8426 Tj 0 -313.2809 Td (6730 ) 21.8426 Tj 0 -322.7743 Td (6731 ) 21.8426 Tj 0 -332.2676 Td (6732 ) 21.8426 Tj 0 -341.761 Td (6733 ) 21.8426 Tj 0 -351.2543 Td (6734 ) 21.8426 Tj 0 -360.7477 Td (6735 ) 21.8426 Tj 0 -370.2411 Td (6736 ) 21.8426 Tj 0 -379.7344 Td (6737 ) 21.8426 Tj 0 -389.2278 Td (6738 ) 21.8426 Tj 0 -398.7211 Td (6739 ) 21.8426 Tj 0 -408.2145 Td (6740 ) 21.8426 Tj 0 -417.7079 Td (6741 ) 21.8426 Tj 0 -427.2012 Td (6742 ) 21.8426 Tj 0 -436.6946 Td (6743 ) 21.8426 Tj 0 -446.1879 Td (6744 ) 21.8426 Tj 0 -455.6813 Td (6745 ) 21.8426 Tj 0 -465.1747 Td (6746 ) 21.8426 Tj 0 -474.668 Td (6747 ) 21.8426 Tj 0 -484.1614 Td (6748 ) 21.8426 Tj 0 -493.6547 Td (6749 ) 21.8426 Tj 0 -522.1348 Td (Sheet 67) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/usys.S Page 1) 161.635 Tj 0 -28.4801 Td (6750 #include "syscall.h") 109.2129 Tj 0 -37.9735 Td (6751 #include "traps.h") 100.4758 Tj 0 -47.4668 Td (6752 ) 21.8426 Tj 0 -56.9602 Td (6753 #define SYSCALL$name$ \\) 122.3184 Tj 0 -66.4535 Td (6754 .globl name; \\) 91.7388 Tj 0 -75.9469 Td (6755 name: \\) 61.1592 Tj 0 -85.4403 Td (6756 movl $SYS_ ## name, %eax; \\) 157.2665 Tj 0 -94.9336 Td (6757 int $T_SYSCALL; \\) 113.5814 Tj 0 -104.427 Td (6758 ret) 52.4222 Tj 0 -113.9203 Td (6759 ) 21.8426 Tj 0 -123.4137 Td (6760 SYSCALL$fork$) 78.6333 Tj 0 -132.9071 Td (6761 SYSCALL$exit$) 78.6333 Tj 0 -142.4004 Td (6762 SYSCALL$wait$) 78.6333 Tj 0 -151.8938 Td (6763 SYSCALL$pipe$) 78.6333 Tj 0 -161.3871 Td (6764 SYSCALL$read$) 78.6333 Tj 0 -170.8805 Td (6765 SYSCALL$write$) 83.0018 Tj 0 -180.3739 Td (6766 SYSCALL$close$) 83.0018 Tj 0 -189.8672 Td (6767 SYSCALL$kill$) 78.6333 Tj 0 -199.3606 Td (6768 SYSCALL$exec$) 78.6333 Tj 0 -208.8539 Td (6769 SYSCALL$open$) 78.6333 Tj 0 -218.3473 Td (6770 SYSCALL$mknod$) 83.0018 Tj 0 -227.8407 Td (6771 SYSCALL$unlink$) 87.3703 Tj 0 -237.334 Td (6772 SYSCALL$fstat$) 83.0018 Tj 0 -246.8274 Td (6773 SYSCALL$link$) 78.6333 Tj 0 -256.3207 Td (6774 SYSCALL$mkdir$) 83.0018 Tj 0 -265.8141 Td (6775 SYSCALL$chdir$) 83.0018 Tj 0 -275.3075 Td (6776 SYSCALL$dup$) 74.2647 Tj 0 -284.8008 Td (6777 SYSCALL$getpid$) 87.3703 Tj 0 -294.2942 Td (6778 SYSCALL$sbrk$) 78.6333 Tj 0 -303.7875 Td (6779 SYSCALL$sleep$) 83.0018 Tj 0 -313.2809 Td (6780 ) 21.8426 Tj 0 -322.7743 Td (6781 ) 21.8426 Tj 0 -332.2676 Td (6782 ) 21.8426 Tj 0 -341.761 Td (6783 ) 21.8426 Tj 0 -351.2543 Td (6784 ) 21.8426 Tj 0 -360.7477 Td (6785 ) 21.8426 Tj 0 -370.2411 Td (6786 ) 21.8426 Tj 0 -379.7344 Td (6787 ) 21.8426 Tj 0 -389.2278 Td (6788 ) 21.8426 Tj 0 -398.7211 Td (6789 ) 21.8426 Tj 0 -408.2145 Td (6790 ) 21.8426 Tj 0 -417.7079 Td (6791 ) 21.8426 Tj 0 -427.2012 Td (6792 ) 21.8426 Tj 0 -436.6946 Td (6793 ) 21.8426 Tj 0 -446.1879 Td (6794 ) 21.8426 Tj 0 -455.6813 Td (6795 ) 21.8426 Tj 0 -465.1747 Td (6796 ) 21.8426 Tj 0 -474.668 Td (6797 ) 21.8426 Tj 0 -484.1614 Td (6798 ) 21.8426 Tj 0 -493.6547 Td (6799 ) 21.8426 Tj 0 -522.1348 Td (Sheet 67) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 75 75 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/init.c Page 1) 161.635 Tj 0 -28.4801 Td (6800 // init: The initial user-level program) 192.2146 Tj 0 -37.9735 Td (6801 ) 21.8426 Tj 0 -47.4668 Td (6802 #include "types.h") 100.4758 Tj 0 -56.9602 Td (6803 #include "stat.h") 96.1073 Tj 0 -66.4535 Td (6804 #include "user.h") 96.1073 Tj 0 -75.9469 Td (6805 #include "fcntl.h") 100.4758 Tj 0 -85.4403 Td (6806 ) 21.8426 Tj 0 -94.9336 Td (6807 char *argv[] = { "sh", 0 };) 139.7925 Tj 0 -104.427 Td (6808 ) 21.8426 Tj 0 -113.9203 Td (6809 int) 34.9481 Tj 0 -123.4137 Td (6810 main$void$) 65.5277 Tj 0 -132.9071 Td (6811 {) 26.2111 Tj 0 -142.4004 Td (6812 int pid, wpid;) 91.7388 Tj 0 -151.8938 Td (6813 ) 21.8426 Tj 0 -161.3871 Td (6814 if$open\("console", O_RDWR$ < 0\){) 170.3721 Tj 0 -170.8805 Td (6815 mknod$"console", 1, 1$;) 139.7925 Tj 0 -180.3739 Td (6816 open$"console", O_RDWR$;) 144.161 Tj 0 -189.8672 Td (6817 }) 34.9481 Tj 0 -199.3606 Td (6818 dup$0$; // stdout) 109.2129 Tj 0 -208.8539 Td (6819 dup$0$; // stderr) 109.2129 Tj 0 -218.3473 Td (6820 ) 21.8426 Tj 0 -227.8407 Td (6821 for$;;${) 65.5277 Tj 0 -237.334 Td (6822 printf$1, "init: starting sh\\n"$;) 183.4776 Tj 0 -246.8274 Td (6823 pid = fork;) 96.1073 Tj 0 -256.3207 Td (6824 if$pid < 0${) 91.7388 Tj 0 -265.8141 Td (6825 printf$1, "init: fork failed\\n"$;) 192.2146 Tj 0 -275.3075 Td (6826 exit;) 78.6333 Tj 0 -284.8008 Td (6827 }) 43.6851 Tj 0 -294.2942 Td (6828 if$pid == 0${) 96.1073 Tj 0 -303.7875 Td (6829 exec$"sh", argv$;) 122.3184 Tj 0 -313.2809 Td (6830 printf$1, "init: exec sh failed\\n"$;) 205.3202 Tj 0 -322.7743 Td (6831 exit;) 78.6333 Tj 0 -332.2676 Td (6832 }) 43.6851 Tj 0 -341.761 Td (6833 while$\(wpid=wait\($\) >= 0 && wpid != pid\)) 214.0572 Tj 0 -351.2543 Td (6834 printf$1, "zombie!\\n"$;) 148.5295 Tj 0 -360.7477 Td (6835 }) 34.9481 Tj 0 -370.2411 Td (6836 }) 26.2111 Tj 0 -379.7344 Td (6837 ) 21.8426 Tj 0 -389.2278 Td (6838 ) 21.8426 Tj 0 -398.7211 Td (6839 ) 21.8426 Tj 0 -408.2145 Td (6840 ) 21.8426 Tj 0 -417.7079 Td (6841 ) 21.8426 Tj 0 -427.2012 Td (6842 ) 21.8426 Tj 0 -436.6946 Td (6843 ) 21.8426 Tj 0 -446.1879 Td (6844 ) 21.8426 Tj 0 -455.6813 Td (6845 ) 21.8426 Tj 0 -465.1747 Td (6846 ) 21.8426 Tj 0 -474.668 Td (6847 ) 21.8426 Tj 0 -484.1614 Td (6848 ) 21.8426 Tj 0 -493.6547 Td (6849 ) 21.8426 Tj 0 -522.1348 Td (Sheet 68) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/sh.c Page 1) 152.898 Tj 0 -28.4801 Td (6850 // Shell.) 61.1592 Tj 0 -37.9735 Td (6851 ) 21.8426 Tj 0 -47.4668 Td (6852 #include "types.h") 100.4758 Tj 0 -56.9602 Td (6853 #include "user.h") 96.1073 Tj 0 -66.4535 Td (6854 #include "fcntl.h") 100.4758 Tj 0 -75.9469 Td (6855 ) 21.8426 Tj 0 -85.4403 Td (6856 // Parsed command representation) 161.635 Tj 0 -94.9336 Td (6857 #define EXEC 1) 87.3703 Tj 0 -104.427 Td (6858 #define REDIR 2) 87.3703 Tj 0 -113.9203 Td (6859 #define PIPE 3) 87.3703 Tj 0 -123.4137 Td (6860 #define LIST 4) 87.3703 Tj 0 -132.9071 Td (6861 #define BACK 5) 87.3703 Tj 0 -142.4004 Td (6862 ) 21.8426 Tj 0 -151.8938 Td (6863 #define MAXARGS 10) 100.4758 Tj 0 -161.3871 Td (6864 ) 21.8426 Tj 0 -170.8805 Td (6865 struct cmd {) 74.2647 Tj 0 -180.3739 Td (6866 int type;) 69.8962 Tj 0 -189.8672 Td (6867 };) 30.5796 Tj 0 -199.3606 Td (6868 ) 21.8426 Tj 0 -208.8539 Td (6869 struct execcmd {) 91.7388 Tj 0 -218.3473 Td (6870 int type;) 69.8962 Tj 0 -227.8407 Td (6871 char *argv[MAXARGS];) 117.9499 Tj 0 -237.334 Td (6872 char *eargv[MAXARGS];) 122.3184 Tj 0 -246.8274 Td (6873 };) 30.5796 Tj 0 -256.3207 Td (6874 ) 21.8426 Tj 0 -265.8141 Td (6875 struct redircmd {) 96.1073 Tj 0 -275.3075 Td (6876 int type;) 69.8962 Tj 0 -284.8008 Td (6877 struct cmd *cmd;) 100.4758 Tj 0 -294.2942 Td (6878 char *file;) 78.6333 Tj 0 -303.7875 Td (6879 char *efile;) 83.0018 Tj 0 -313.2809 Td (6880 int mode;) 69.8962 Tj 0 -322.7743 Td (6881 int fd;) 61.1592 Tj 0 -332.2676 Td (6882 };) 30.5796 Tj 0 -341.761 Td (6883 ) 21.8426 Tj 0 -351.2543 Td (6884 struct pipecmd {) 91.7388 Tj 0 -360.7477 Td (6885 int type;) 69.8962 Tj 0 -370.2411 Td (6886 struct cmd *left;) 104.8443 Tj 0 -379.7344 Td (6887 struct cmd *right;) 109.2129 Tj 0 -389.2278 Td (6888 };) 30.5796 Tj 0 -398.7211 Td (6889 ) 21.8426 Tj 0 -408.2145 Td (6890 struct listcmd {) 91.7388 Tj 0 -417.7079 Td (6891 int type;) 69.8962 Tj 0 -427.2012 Td (6892 struct cmd *left;) 104.8443 Tj 0 -436.6946 Td (6893 struct cmd *right;) 109.2129 Tj 0 -446.1879 Td (6894 };) 30.5796 Tj 0 -455.6813 Td (6895 ) 21.8426 Tj 0 -465.1747 Td (6896 struct backcmd {) 91.7388 Tj 0 -474.668 Td (6897 int type;) 69.8962 Tj 0 -484.1614 Td (6898 struct cmd *cmd;) 100.4758 Tj 0 -493.6547 Td (6899 };) 30.5796 Tj 0 -522.1348 Td (Sheet 68) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 76 76 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/sh.c Page 2) 152.898 Tj 0 -28.4801 Td (6900 int fork1$void$; // Fork but panics on failure.) 231.5313 Tj 0 -37.9735 Td (6901 void panic$char*$;) 100.4758 Tj 0 -47.4668 Td (6902 struct cmd *parsecmd$char*$;) 144.161 Tj 0 -56.9602 Td (6903 ) 21.8426 Tj 0 -66.4535 Td (6904 // Execute cmd. Never returns.) 157.2665 Tj 0 -75.9469 Td (6905 void) 39.3166 Tj 0 -85.4403 Td (6906 runcmd$struct cmd *cmd$) 122.3184 Tj 0 -94.9336 Td (6907 {) 26.2111 Tj 0 -104.427 Td (6908 int p[2];) 69.8962 Tj 0 -113.9203 Td (6909 struct backcmd *bcmd;) 122.3184 Tj 0 -123.4137 Td (6910 struct execcmd *ecmd;) 122.3184 Tj 0 -132.9071 Td (6911 struct listcmd *lcmd;) 122.3184 Tj 0 -142.4004 Td (6912 struct pipecmd *pcmd;) 122.3184 Tj 0 -151.8938 Td (6913 struct redircmd *rcmd;) 126.6869 Tj 0 -161.3871 Td (6914 ) 21.8426 Tj 0 -170.8805 Td (6915 if$cmd == 0$) 83.0018 Tj 0 -180.3739 Td (6916 exit;) 69.8962 Tj 0 -189.8672 Td (6917 ) 21.8426 Tj 0 -199.3606 Td (6918 switch$cmd->type${) 109.2129 Tj 0 -208.8539 Td (6919 default:) 65.5277 Tj 0 -218.3473 Td (6920 panic$"runcmd"$;) 109.2129 Tj 0 -227.8407 Td (6921 ) 21.8426 Tj 0 -237.334 Td (6922 case EXEC:) 74.2647 Tj 0 -246.8274 Td (6923 ecmd = $struct execcmd*$cmd;) 161.635 Tj 0 -256.3207 Td (6924 if$ecmd->argv[0] == 0$) 135.4239 Tj 0 -265.8141 Td (6925 exit;) 78.6333 Tj 0 -275.3075 Td (6926 exec$ecmd->argv[0], ecmd->argv$;) 179.1091 Tj 0 -284.8008 Td (6927 printf$2, "exec %s failed\\n", ecmd->argv[0]$;) 235.8998 Tj 0 -294.2942 Td (6928 break;) 65.5277 Tj 0 -303.7875 Td (6929 ) 21.8426 Tj 0 -313.2809 Td (6930 case REDIR:) 78.6333 Tj 0 -322.7743 Td (6931 rcmd = $struct redircmd*$cmd;) 166.0035 Tj 0 -332.2676 Td (6932 close$rcmd->fd$;) 109.2129 Tj 0 -341.761 Td (6933 if$open\(rcmd->file, rcmd->mode$ < 0\){) 200.9517 Tj 0 -351.2543 Td (6934 printf$2, "open %s failed\\n", rcmd->file$;) 231.5313 Tj 0 -360.7477 Td (6935 exit;) 78.6333 Tj 0 -370.2411 Td (6936 }) 43.6851 Tj 0 -379.7344 Td (6937 runcmd$rcmd->cmd$;) 117.9499 Tj 0 -389.2278 Td (6938 break;) 65.5277 Tj 0 -398.7211 Td (6939 ) 21.8426 Tj 0 -408.2145 Td (6940 case LIST:) 74.2647 Tj 0 -417.7079 Td (6941 lcmd = $struct listcmd*$cmd;) 161.635 Tj 0 -427.2012 Td (6942 if$fork1\($ == 0\)) 109.2129 Tj 0 -436.6946 Td (6943 runcmd$lcmd->left$;) 131.0554 Tj 0 -446.1879 Td (6944 wait;) 69.8962 Tj 0 -455.6813 Td (6945 runcmd$lcmd->right$;) 126.6869 Tj 0 -465.1747 Td (6946 break;) 65.5277 Tj 0 -474.668 Td (6947 ) 21.8426 Tj 0 -484.1614 Td (6948 ) 21.8426 Tj 0 -493.6547 Td (6949 ) 21.8426 Tj 0 -522.1348 Td (Sheet 69) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/sh.c Page 3) 152.898 Tj 0 -28.4801 Td (6950 case PIPE:) 74.2647 Tj 0 -37.9735 Td (6951 pcmd = $struct pipecmd*$cmd;) 161.635 Tj 0 -47.4668 Td (6952 if$pipe\(p$ < 0\)) 104.8443 Tj 0 -56.9602 Td (6953 panic$"pipe"$;) 109.2129 Tj 0 -66.4535 Td (6954 if$fork1\($ == 0\){) 113.5814 Tj 0 -75.9469 Td (6955 close$1$;) 87.3703 Tj 0 -85.4403 Td (6956 dup$p[1]$;) 91.7388 Tj 0 -94.9336 Td (6957 close$p[0]$;) 100.4758 Tj 0 -104.427 Td (6958 close$p[1]$;) 100.4758 Tj 0 -113.9203 Td (6959 runcmd$pcmd->left$;) 131.0554 Tj 0 -123.4137 Td (6960 }) 43.6851 Tj 0 -132.9071 Td (6961 if$fork1\($ == 0\){) 113.5814 Tj 0 -142.4004 Td (6962 close$0$;) 87.3703 Tj 0 -151.8938 Td (6963 dup$p[0]$;) 91.7388 Tj 0 -161.3871 Td (6964 close$p[0]$;) 100.4758 Tj 0 -170.8805 Td (6965 close$p[1]$;) 100.4758 Tj 0 -180.3739 Td (6966 runcmd$pcmd->right$;) 135.4239 Tj 0 -189.8672 Td (6967 }) 43.6851 Tj 0 -199.3606 Td (6968 close$p[0]$;) 91.7388 Tj 0 -208.8539 Td (6969 close$p[1]$;) 91.7388 Tj 0 -218.3473 Td (6970 wait;) 69.8962 Tj 0 -227.8407 Td (6971 wait;) 69.8962 Tj 0 -237.334 Td (6972 break;) 65.5277 Tj 0 -246.8274 Td (6973 ) 21.8426 Tj 0 -256.3207 Td (6974 case BACK:) 74.2647 Tj 0 -265.8141 Td (6975 bcmd = $struct backcmd*$cmd;) 161.635 Tj 0 -275.3075 Td (6976 if$fork1\($ == 0\)) 109.2129 Tj 0 -284.8008 Td (6977 runcmd$bcmd->cmd$;) 126.6869 Tj 0 -294.2942 Td (6978 break;) 65.5277 Tj 0 -303.7875 Td (6979 }) 34.9481 Tj 0 -313.2809 Td (6980 exit;) 61.1592 Tj 0 -322.7743 Td (6981 }) 26.2111 Tj 0 -332.2676 Td (6982 ) 21.8426 Tj 0 -341.761 Td (6983 int) 34.9481 Tj 0 -351.2543 Td (6984 getcmd$char *buf, int nbuf$) 139.7925 Tj 0 -360.7477 Td (6985 {) 26.2111 Tj 0 -370.2411 Td (6986 printf$2, "$ "$;) 100.4758 Tj 0 -379.7344 Td (6987 memset$buf, 0, nbuf$;) 122.3184 Tj 0 -389.2278 Td (6988 gets$buf, nbuf$;) 100.4758 Tj 0 -398.7211 Td (6989 if$buf[0] == 0$ // EOF) 126.6869 Tj 0 -408.2145 Td (6990 return -1;) 83.0018 Tj 0 -417.7079 Td (6991 return 0;) 69.8962 Tj 0 -427.2012 Td (6992 }) 26.2111 Tj 0 -436.6946 Td (6993 ) 21.8426 Tj 0 -446.1879 Td (6994 ) 21.8426 Tj 0 -455.6813 Td (6995 ) 21.8426 Tj 0 -465.1747 Td (6996 ) 21.8426 Tj 0 -474.668 Td (6997 ) 21.8426 Tj 0 -484.1614 Td (6998 ) 21.8426 Tj 0 -493.6547 Td (6999 ) 21.8426 Tj 0 -522.1348 Td (Sheet 69) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 77 77 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/sh.c Page 4) 152.898 Tj 0 -28.4801 Td (7000 int) 34.9481 Tj 0 -37.9735 Td (7001 main$void$) 65.5277 Tj 0 -47.4668 Td (7002 {) 26.2111 Tj 0 -56.9602 Td (7003 static char buf[100];) 122.3184 Tj 0 -66.4535 Td (7004 int fd;) 61.1592 Tj 0 -75.9469 Td (7005 ) 21.8426 Tj 0 -85.4403 Td (7006 // Assumes three file descriptors open.) 200.9517 Tj 0 -94.9336 Td (7007 while$\(fd = open\("console", O_RDWR$\) >= 0\){) 218.4257 Tj 0 -104.427 Td (7008 if$fd >= 3${) 91.7388 Tj 0 -113.9203 Td (7009 close$fd$;) 91.7388 Tj 0 -123.4137 Td (7010 break;) 74.2647 Tj 0 -132.9071 Td (7011 }) 43.6851 Tj 0 -142.4004 Td (7012 }) 34.9481 Tj 0 -151.8938 Td (7013 ) 21.8426 Tj 0 -161.3871 Td (7014 // Read and run input commands.) 166.0035 Tj 0 -170.8805 Td (7015 while$getcmd\(buf, sizeof\(buf$\) >= 0\){) 192.2146 Tj 0 -180.3739 Td (7016 if$buf[0] == 'c' && buf[1] == 'd' && buf[2] == ' '${) 266.4794 Tj 0 -189.8672 Td (7017 // Clumsy but will have to do for now.) 214.0572 Tj 0 -199.3606 Td (7018 // Chdir has no effect on the parent if run in the c\ hild.) 297.059 Tj 0 -208.8539 Td (7019 buf[strlen$buf$-1] = 0; // chop \\n) 200.9517 Tj 0 -218.3473 Td (7020 if$chdir\(buf+3$ < 0\)) 135.4239 Tj 0 -227.8407 Td (7021 printf$2, "cannot cd %s\\n", buf+3$;) 209.6887 Tj 0 -237.334 Td (7022 continue;) 87.3703 Tj 0 -246.8274 Td (7023 }) 43.6851 Tj 0 -256.3207 Td (7024 if$fork1\($ == 0\)) 109.2129 Tj 0 -265.8141 Td (7025 runcmd$parsecmd\(buf$\);) 144.161 Tj 0 -275.3075 Td (7026 wait;) 69.8962 Tj 0 -284.8008 Td (7027 }) 34.9481 Tj 0 -294.2942 Td (7028 exit;) 61.1592 Tj 0 -303.7875 Td (7029 }) 26.2111 Tj 0 -313.2809 Td (7030 ) 21.8426 Tj 0 -322.7743 Td (7031 void) 39.3166 Tj 0 -332.2676 Td (7032 panic$char *s$) 83.0018 Tj 0 -341.761 Td (7033 {) 26.2111 Tj 0 -351.2543 Td (7034 printf$2, "%s\\n", s$;) 122.3184 Tj 0 -360.7477 Td (7035 exit;) 61.1592 Tj 0 -370.2411 Td (7036 }) 26.2111 Tj 0 -379.7344 Td (7037 ) 21.8426 Tj 0 -389.2278 Td (7038 int) 34.9481 Tj 0 -398.7211 Td (7039 fork1$void$) 69.8962 Tj 0 -408.2145 Td (7040 {) 26.2111 Tj 0 -417.7079 Td (7041 int pid;) 65.5277 Tj 0 -427.2012 Td (7042 ) 21.8426 Tj 0 -436.6946 Td (7043 pid = fork;) 87.3703 Tj 0 -446.1879 Td (7044 if$pid == -1$) 87.3703 Tj 0 -455.6813 Td (7045 panic$"fork"$;) 100.4758 Tj 0 -465.1747 Td (7046 return pid;) 78.6333 Tj 0 -474.668 Td (7047 }) 26.2111 Tj 0 -484.1614 Td (7048 ) 21.8426 Tj 0 -493.6547 Td (7049 ) 21.8426 Tj 0 -522.1348 Td (Sheet 70) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/sh.c Page 5) 152.898 Tj 0 -28.4801 Td (7050 // Constructors) 87.3703 Tj 0 -37.9735 Td (7051 ) 21.8426 Tj 0 -47.4668 Td (7052 struct cmd*) 69.8962 Tj 0 -56.9602 Td (7053 execcmd$void$) 78.6333 Tj 0 -66.4535 Td (7054 {) 26.2111 Tj 0 -75.9469 Td (7055 struct execcmd *cmd;) 117.9499 Tj 0 -85.4403 Td (7056 ) 21.8426 Tj 0 -94.9336 Td (7057 cmd = malloc$sizeof\(*cmd$\);) 148.5295 Tj 0 -104.427 Td (7058 memset$cmd, 0, sizeof\(*cmd$\);) 157.2665 Tj 0 -113.9203 Td (7059 cmd->type = EXEC;) 104.8443 Tj 0 -123.4137 Td (7060 return $struct cmd*$cmd;) 135.4239 Tj 0 -132.9071 Td (7061 }) 26.2111 Tj 0 -142.4004 Td (7062 ) 21.8426 Tj 0 -151.8938 Td (7063 struct cmd*) 69.8962 Tj 0 -161.3871 Td (7064 redircmd$struct cmd *subcmd, char *file, char *efile, int\ mode, int fd$) 332.0071 Tj 0 -170.8805 Td (7065 {) 26.2111 Tj 0 -180.3739 Td (7066 struct redircmd *cmd;) 122.3184 Tj 0 -189.8672 Td (7067 ) 21.8426 Tj 0 -199.3606 Td (7068 cmd = malloc$sizeof\(*cmd$\);) 148.5295 Tj 0 -208.8539 Td (7069 memset$cmd, 0, sizeof\(*cmd$\);) 157.2665 Tj 0 -218.3473 Td (7070 cmd->type = REDIR;) 109.2129 Tj 0 -227.8407 Td (7071 cmd->cmd = subcmd;) 109.2129 Tj 0 -237.334 Td (7072 cmd->file = file;) 104.8443 Tj 0 -246.8274 Td (7073 cmd->efile = efile;) 113.5814 Tj 0 -256.3207 Td (7074 cmd->mode = mode;) 104.8443 Tj 0 -265.8141 Td (7075 cmd->fd = fd;) 87.3703 Tj 0 -275.3075 Td (7076 return $struct cmd*$cmd;) 135.4239 Tj 0 -284.8008 Td (7077 }) 26.2111 Tj 0 -294.2942 Td (7078 ) 21.8426 Tj 0 -303.7875 Td (7079 struct cmd*) 69.8962 Tj 0 -313.2809 Td (7080 pipecmd$struct cmd *left, struct cmd *right$) 214.0572 Tj 0 -322.7743 Td (7081 {) 26.2111 Tj 0 -332.2676 Td (7082 struct pipecmd *cmd;) 117.9499 Tj 0 -341.761 Td (7083 ) 21.8426 Tj 0 -351.2543 Td (7084 cmd = malloc$sizeof\(*cmd$\);) 148.5295 Tj 0 -360.7477 Td (7085 memset$cmd, 0, sizeof\(*cmd$\);) 157.2665 Tj 0 -370.2411 Td (7086 cmd->type = PIPE;) 104.8443 Tj 0 -379.7344 Td (7087 cmd->left = left;) 104.8443 Tj 0 -389.2278 Td (7088 cmd->right = right;) 113.5814 Tj 0 -398.7211 Td (7089 return $struct cmd*$cmd;) 135.4239 Tj 0 -408.2145 Td (7090 }) 26.2111 Tj 0 -417.7079 Td (7091 ) 21.8426 Tj 0 -427.2012 Td (7092 ) 21.8426 Tj 0 -436.6946 Td (7093 ) 21.8426 Tj 0 -446.1879 Td (7094 ) 21.8426 Tj 0 -455.6813 Td (7095 ) 21.8426 Tj 0 -465.1747 Td (7096 ) 21.8426 Tj 0 -474.668 Td (7097 ) 21.8426 Tj 0 -484.1614 Td (7098 ) 21.8426 Tj 0 -493.6547 Td (7099 ) 21.8426 Tj 0 -522.1348 Td (Sheet 70) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 78 78 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/sh.c Page 6) 152.898 Tj 0 -28.4801 Td (7100 struct cmd*) 69.8962 Tj 0 -37.9735 Td (7101 listcmd$struct cmd *left, struct cmd *right$) 214.0572 Tj 0 -47.4668 Td (7102 {) 26.2111 Tj 0 -56.9602 Td (7103 struct listcmd *cmd;) 117.9499 Tj 0 -66.4535 Td (7104 ) 21.8426 Tj 0 -75.9469 Td (7105 cmd = malloc$sizeof\(*cmd$\);) 148.5295 Tj 0 -85.4403 Td (7106 memset$cmd, 0, sizeof\(*cmd$\);) 157.2665 Tj 0 -94.9336 Td (7107 cmd->type = LIST;) 104.8443 Tj 0 -104.427 Td (7108 cmd->left = left;) 104.8443 Tj 0 -113.9203 Td (7109 cmd->right = right;) 113.5814 Tj 0 -123.4137 Td (7110 return $struct cmd*$cmd;) 135.4239 Tj 0 -132.9071 Td (7111 }) 26.2111 Tj 0 -142.4004 Td (7112 ) 21.8426 Tj 0 -151.8938 Td (7113 struct cmd*) 69.8962 Tj 0 -161.3871 Td (7114 backcmd$struct cmd *subcmd$) 139.7925 Tj 0 -170.8805 Td (7115 {) 26.2111 Tj 0 -180.3739 Td (7116 struct backcmd *cmd;) 117.9499 Tj 0 -189.8672 Td (7117 ) 21.8426 Tj 0 -199.3606 Td (7118 cmd = malloc$sizeof\(*cmd$\);) 148.5295 Tj 0 -208.8539 Td (7119 memset$cmd, 0, sizeof\(*cmd$\);) 157.2665 Tj 0 -218.3473 Td (7120 cmd->type = BACK;) 104.8443 Tj 0 -227.8407 Td (7121 cmd->cmd = subcmd;) 109.2129 Tj 0 -237.334 Td (7122 return $struct cmd*$cmd;) 135.4239 Tj 0 -246.8274 Td (7123 }) 26.2111 Tj 0 -256.3207 Td (7124 ) 21.8426 Tj 0 -265.8141 Td (7125 ) 21.8426 Tj 0 -275.3075 Td (7126 ) 21.8426 Tj 0 -284.8008 Td (7127 ) 21.8426 Tj 0 -294.2942 Td (7128 ) 21.8426 Tj 0 -303.7875 Td (7129 ) 21.8426 Tj 0 -313.2809 Td (7130 ) 21.8426 Tj 0 -322.7743 Td (7131 ) 21.8426 Tj 0 -332.2676 Td (7132 ) 21.8426 Tj 0 -341.761 Td (7133 ) 21.8426 Tj 0 -351.2543 Td (7134 ) 21.8426 Tj 0 -360.7477 Td (7135 ) 21.8426 Tj 0 -370.2411 Td (7136 ) 21.8426 Tj 0 -379.7344 Td (7137 ) 21.8426 Tj 0 -389.2278 Td (7138 ) 21.8426 Tj 0 -398.7211 Td (7139 ) 21.8426 Tj 0 -408.2145 Td (7140 ) 21.8426 Tj 0 -417.7079 Td (7141 ) 21.8426 Tj 0 -427.2012 Td (7142 ) 21.8426 Tj 0 -436.6946 Td (7143 ) 21.8426 Tj 0 -446.1879 Td (7144 ) 21.8426 Tj 0 -455.6813 Td (7145 ) 21.8426 Tj 0 -465.1747 Td (7146 ) 21.8426 Tj 0 -474.668 Td (7147 ) 21.8426 Tj 0 -484.1614 Td (7148 ) 21.8426 Tj 0 -493.6547 Td (7149 ) 21.8426 Tj 0 -522.1348 Td (Sheet 71) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/sh.c Page 7) 152.898 Tj 0 -28.4801 Td (7150 // Parsing) 65.5277 Tj 0 -37.9735 Td (7151 ) 21.8426 Tj 0 -47.4668 Td (7152 char whitespace[] = " \\t\\r\\n\\v";) 161.635 Tj 0 -56.9602 Td (7153 char symbols[] = "<|>&;";) 139.7925 Tj 0 -66.4535 Td (7154 ) 21.8426 Tj 0 -75.9469 Td (7155 int) 34.9481 Tj 0 -85.4403 Td (7156 gettoken$char **ps, char *es, char **q, char **eq$) 240.2683 Tj 0 -94.9336 Td (7157 {) 26.2111 Tj 0 -104.427 Td (7158 char *s;) 65.5277 Tj 0 -113.9203 Td (7159 int ret;) 65.5277 Tj 0 -123.4137 Td (7160 ) 21.8426 Tj 0 -132.9071 Td (7161 s = *ps;) 65.5277 Tj 0 -142.4004 Td (7162 while$s < es && strchr\(whitespace, *s$\)) 200.9517 Tj 0 -151.8938 Td (7163 s++;) 56.7907 Tj 0 -161.3871 Td (7164 if$q$) 52.4222 Tj 0 -170.8805 Td (7165 *q = s;) 69.8962 Tj 0 -180.3739 Td (7166 ret = *s;) 69.8962 Tj 0 -189.8672 Td (7167 switch$*s${) 78.6333 Tj 0 -199.3606 Td (7168 case 0:) 61.1592 Tj 0 -208.8539 Td (7169 break;) 65.5277 Tj 0 -218.3473 Td (7170 case '|':) 69.8962 Tj 0 -227.8407 Td (7171 case '$':) 69.8962 Tj 0 -237.334 Td (7172 case '$':) 69.8962 Tj 0 -246.8274 Td (7173 case ';':) 69.8962 Tj 0 -256.3207 Td (7174 case '&':) 69.8962 Tj 0 -265.8141 Td (7175 case '<':) 69.8962 Tj 0 -275.3075 Td (7176 s++;) 56.7907 Tj 0 -284.8008 Td (7177 break;) 65.5277 Tj 0 -294.2942 Td (7178 case '>':) 69.8962 Tj 0 -303.7875 Td (7179 s++;) 56.7907 Tj 0 -313.2809 Td (7180 if$*s == '>'${) 100.4758 Tj 0 -322.7743 Td (7181 ret = '+';) 91.7388 Tj 0 -332.2676 Td (7182 s++;) 65.5277 Tj 0 -341.761 Td (7183 }) 43.6851 Tj 0 -351.2543 Td (7184 break;) 65.5277 Tj 0 -360.7477 Td (7185 default:) 65.5277 Tj 0 -370.2411 Td (7186 ret = 'a';) 83.0018 Tj 0 -379.7344 Td (7187 while$s < es && !strchr\(whitespace, *s$ && !strchr$\ symbols, *s$\)) 318.9016 Tj 0 -389.2278 Td (7188 s++;) 65.5277 Tj 0 -398.7211 Td (7189 break;) 65.5277 Tj 0 -408.2145 Td (7190 }) 34.9481 Tj 0 -417.7079 Td (7191 if$eq$) 56.7907 Tj 0 -427.2012 Td (7192 *eq = s;) 74.2647 Tj 0 -436.6946 Td (7193 ) 21.8426 Tj 0 -446.1879 Td (7194 while$s < es && strchr\(whitespace, *s$\)) 200.9517 Tj 0 -455.6813 Td (7195 s++;) 56.7907 Tj 0 -465.1747 Td (7196 *ps = s;) 65.5277 Tj 0 -474.668 Td (7197 return ret;) 78.6333 Tj 0 -484.1614 Td (7198 }) 26.2111 Tj 0 -493.6547 Td (7199 ) 21.8426 Tj 0 -522.1348 Td (Sheet 71) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 79 79 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/sh.c Page 8) 152.898 Tj 0 -28.4801 Td (7200 int) 34.9481 Tj 0 -37.9735 Td (7201 peek$char **ps, char *es, char *toks$) 183.4776 Tj 0 -47.4668 Td (7202 {) 26.2111 Tj 0 -56.9602 Td (7203 char *s;) 65.5277 Tj 0 -66.4535 Td (7204 ) 21.8426 Tj 0 -75.9469 Td (7205 s = *ps;) 65.5277 Tj 0 -85.4403 Td (7206 while$s < es && strchr\(whitespace, *s$\)) 200.9517 Tj 0 -94.9336 Td (7207 s++;) 56.7907 Tj 0 -104.427 Td (7208 *ps = s;) 65.5277 Tj 0 -113.9203 Td (7209 return *s && strchr$toks, *s$;) 161.635 Tj 0 -123.4137 Td (7210 }) 26.2111 Tj 0 -132.9071 Td (7211 ) 21.8426 Tj 0 -142.4004 Td (7212 struct cmd *parseline$char**, char*$;) 183.4776 Tj 0 -151.8938 Td (7213 struct cmd *parsepipe$char**, char*$;) 183.4776 Tj 0 -161.3871 Td (7214 struct cmd *parseexec$char**, char*$;) 183.4776 Tj 0 -170.8805 Td (7215 struct cmd *nulterminate$struct cmd*$;) 187.8461 Tj 0 -180.3739 Td (7216 ) 21.8426 Tj 0 -189.8672 Td (7217 struct cmd*) 69.8962 Tj 0 -199.3606 Td (7218 parsecmd$char *s$) 96.1073 Tj 0 -208.8539 Td (7219 {) 26.2111 Tj 0 -218.3473 Td (7220 char *es;) 69.8962 Tj 0 -227.8407 Td (7221 struct cmd *cmd;) 100.4758 Tj 0 -237.334 Td (7222 ) 21.8426 Tj 0 -246.8274 Td (7223 es = s + strlen$s$;) 113.5814 Tj 0 -256.3207 Td (7224 cmd = parseline$&s, es$;) 135.4239 Tj 0 -265.8141 Td (7225 peek$&s, es, ""$;) 104.8443 Tj 0 -275.3075 Td (7226 if$s != es${) 83.0018 Tj 0 -284.8008 Td (7227 printf$2, "leftovers: %s\\n", s$;) 179.1091 Tj 0 -294.2942 Td (7228 panic$"syntax"$;) 109.2129 Tj 0 -303.7875 Td (7229 }) 34.9481 Tj 0 -313.2809 Td (7230 nulterminate$cmd$;) 109.2129 Tj 0 -322.7743 Td (7231 return cmd;) 78.6333 Tj 0 -332.2676 Td (7232 }) 26.2111 Tj 0 -341.761 Td (7233 ) 21.8426 Tj 0 -351.2543 Td (7234 struct cmd*) 69.8962 Tj 0 -360.7477 Td (7235 parseline$char **ps, char *es$) 152.898 Tj 0 -370.2411 Td (7236 {) 26.2111 Tj 0 -379.7344 Td (7237 struct cmd *cmd;) 100.4758 Tj 0 -389.2278 Td (7238 ) 21.8426 Tj 0 -398.7211 Td (7239 cmd = parsepipe$ps, es$;) 135.4239 Tj 0 -408.2145 Td (7240 while$peek\(ps, es, "&"$\){) 139.7925 Tj 0 -417.7079 Td (7241 gettoken$ps, es, 0, 0$;) 139.7925 Tj 0 -427.2012 Td (7242 cmd = backcmd$cmd$;) 122.3184 Tj 0 -436.6946 Td (7243 }) 34.9481 Tj 0 -446.1879 Td (7244 if$peek\(ps, es, ";"$\){) 126.6869 Tj 0 -455.6813 Td (7245 gettoken$ps, es, 0, 0$;) 139.7925 Tj 0 -465.1747 Td (7246 cmd = listcmd$cmd, parseline\(ps, es$\);) 205.3202 Tj 0 -474.668 Td (7247 }) 34.9481 Tj 0 -484.1614 Td (7248 return cmd;) 78.6333 Tj 0 -493.6547 Td (7249 }) 26.2111 Tj 0 -522.1348 Td (Sheet 72) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/sh.c Page 9) 152.898 Tj 0 -28.4801 Td (7250 struct cmd*) 69.8962 Tj 0 -37.9735 Td (7251 parsepipe$char **ps, char *es$) 152.898 Tj 0 -47.4668 Td (7252 {) 26.2111 Tj 0 -56.9602 Td (7253 struct cmd *cmd;) 100.4758 Tj 0 -66.4535 Td (7254 ) 21.8426 Tj 0 -75.9469 Td (7255 cmd = parseexec$ps, es$;) 135.4239 Tj 0 -85.4403 Td (7256 if$peek\(ps, es, "|"$\){) 126.6869 Tj 0 -94.9336 Td (7257 gettoken$ps, es, 0, 0$;) 139.7925 Tj 0 -104.427 Td (7258 cmd = pipecmd$cmd, parsepipe\(ps, es$\);) 205.3202 Tj 0 -113.9203 Td (7259 }) 34.9481 Tj 0 -123.4137 Td (7260 return cmd;) 78.6333 Tj 0 -132.9071 Td (7261 }) 26.2111 Tj 0 -142.4004 Td (7262 ) 21.8426 Tj 0 -151.8938 Td (7263 struct cmd*) 69.8962 Tj 0 -161.3871 Td (7264 parseredirs$struct cmd *cmd, char **ps, char *es$) 235.8998 Tj 0 -170.8805 Td (7265 {) 26.2111 Tj 0 -180.3739 Td (7266 int tok;) 65.5277 Tj 0 -189.8672 Td (7267 char *q, *eq;) 87.3703 Tj 0 -199.3606 Td (7268 ) 21.8426 Tj 0 -208.8539 Td (7269 while$peek\(ps, es, "<>"$\){) 144.161 Tj 0 -218.3473 Td (7270 tok = gettoken$ps, es, 0, 0$;) 166.0035 Tj 0 -227.8407 Td (7271 if$gettoken\(ps, es, &q, &eq$ != 'a'\)) 196.5831 Tj 0 -237.334 Td (7272 panic$"missing file for redirection"$;) 214.0572 Tj 0 -246.8274 Td (7273 switch$tok${) 91.7388 Tj 0 -256.3207 Td (7274 case '<':) 78.6333 Tj 0 -265.8141 Td (7275 cmd = redircmd$cmd, q, eq, O_RDONLY, 0$;) 222.7942 Tj 0 -275.3075 Td (7276 break;) 74.2647 Tj 0 -284.8008 Td (7277 case '>':) 78.6333 Tj 0 -294.2942 Td (7278 cmd = redircmd$cmd, q, eq, O_WRONLY|O_CREATE, 1$;) 262.1109 Tj 0 -303.7875 Td (7279 break;) 74.2647 Tj 0 -313.2809 Td (7280 case '+': // >>) 109.2129 Tj 0 -322.7743 Td (7281 cmd = redircmd$cmd, q, eq, O_WRONLY|O_CREATE, 1$;) 262.1109 Tj 0 -332.2676 Td (7282 break;) 74.2647 Tj 0 -341.761 Td (7283 }) 43.6851 Tj 0 -351.2543 Td (7284 }) 34.9481 Tj 0 -360.7477 Td (7285 return cmd;) 78.6333 Tj 0 -370.2411 Td (7286 }) 26.2111 Tj 0 -379.7344 Td (7287 ) 21.8426 Tj 0 -389.2278 Td (7288 ) 21.8426 Tj 0 -398.7211 Td (7289 ) 21.8426 Tj 0 -408.2145 Td (7290 ) 21.8426 Tj 0 -417.7079 Td (7291 ) 21.8426 Tj 0 -427.2012 Td (7292 ) 21.8426 Tj 0 -436.6946 Td (7293 ) 21.8426 Tj 0 -446.1879 Td (7294 ) 21.8426 Tj 0 -455.6813 Td (7295 ) 21.8426 Tj 0 -465.1747 Td (7296 ) 21.8426 Tj 0 -474.668 Td (7297 ) 21.8426 Tj 0 -484.1614 Td (7298 ) 21.8426 Tj 0 -493.6547 Td (7299 ) 21.8426 Tj 0 -522.1348 Td (Sheet 72) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Page: 80 80 %%BeginPageSetup %%PageOrientation: Landscape pdfStartPage 180 rotate -612 -792 translate 0 0 612 792 re W %%EndPageSetup [] 0 d 1 i 0 j 0 J 10 M 1 w /DeviceGray {} cs [0] sc /DeviceGray {} CS [0] SC false op false OP {} settransfer 0 0 612 792 re W q q [0.1 0 0 0.1 0 0] cm q 180 3960 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 738.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/sh.c Page 10) 157.2665 Tj 0 -28.4801 Td (7300 struct cmd*) 69.8962 Tj 0 -37.9735 Td (7301 parseblock$char **ps, char *es$) 157.2665 Tj 0 -47.4668 Td (7302 {) 26.2111 Tj 0 -56.9602 Td (7303 struct cmd *cmd;) 100.4758 Tj 0 -66.4535 Td (7304 ) 21.8426 Tj 0 -75.9469 Td (7305 if$!peek\(ps, es, "\("$\)) 126.6869 Tj 0 -85.4403 Td (7306 panic$"parseblock"$;) 126.6869 Tj 0 -94.9336 Td (7307 gettoken$ps, es, 0, 0$;) 131.0554 Tj 0 -104.427 Td (7308 cmd = parseline$ps, es$;) 135.4239 Tj 0 -113.9203 Td (7309 if$!peek\(ps, es, "$"\)\)) 126.6869 Tj 0 -123.4137 Td (7310 panic$"syntax - missing $"\);) 161.635 Tj 0 -132.9071 Td (7311 gettoken$ps, es, 0, 0$;) 131.0554 Tj 0 -142.4004 Td (7312 cmd = parseredirs$cmd, ps, es$;) 166.0035 Tj 0 -151.8938 Td (7313 return cmd;) 78.6333 Tj 0 -161.3871 Td (7314 }) 26.2111 Tj 0 -170.8805 Td (7315 ) 21.8426 Tj 0 -180.3739 Td (7316 struct cmd*) 69.8962 Tj 0 -189.8672 Td (7317 parseexec$char **ps, char *es$) 152.898 Tj 0 -199.3606 Td (7318 {) 26.2111 Tj 0 -208.8539 Td (7319 char *q, *eq;) 87.3703 Tj 0 -218.3473 Td (7320 int tok, argc;) 91.7388 Tj 0 -227.8407 Td (7321 struct execcmd *cmd;) 117.9499 Tj 0 -237.334 Td (7322 struct cmd *ret;) 100.4758 Tj 0 -246.8274 Td (7323 ) 21.8426 Tj 0 -256.3207 Td (7324 if$peek\(ps, es, "\("$\)) 122.3184 Tj 0 -265.8141 Td (7325 return parseblock$ps, es$;) 152.898 Tj 0 -275.3075 Td (7326 ) 21.8426 Tj 0 -284.8008 Td (7327 ret = execcmd;) 100.4758 Tj 0 -294.2942 Td (7328 cmd = $struct execcmd*$ret;) 148.5295 Tj 0 -303.7875 Td (7329 ) 21.8426 Tj 0 -313.2809 Td (7330 argc = 0;) 69.8962 Tj 0 -322.7743 Td (7331 ret = parseredirs$ret, ps, es$;) 166.0035 Tj 0 -332.2676 Td (7332 while$!peek\(ps, es, "|$&;"\)\){) 157.2665 Tj 0 -341.761 Td (7333 if$\(tok=gettoken\(ps, es, &q, &eq$\) == 0\)) 214.0572 Tj 0 -351.2543 Td (7334 break;) 74.2647 Tj 0 -360.7477 Td (7335 if$tok != 'a'$) 100.4758 Tj 0 -370.2411 Td (7336 panic$"syntax"$;) 117.9499 Tj 0 -379.7344 Td (7337 cmd->argv[argc] = q;) 126.6869 Tj 0 -389.2278 Td (7338 cmd->eargv[argc] = eq;) 135.4239 Tj 0 -398.7211 Td (7339 argc++;) 69.8962 Tj 0 -408.2145 Td (7340 if$argc >= MAXARGS$) 122.3184 Tj 0 -417.7079 Td (7341 panic$"too many args"$;) 148.5295 Tj 0 -427.2012 Td (7342 ret = parseredirs$ret, ps, es$;) 174.7406 Tj 0 -436.6946 Td (7343 }) 34.9481 Tj 0 -446.1879 Td (7344 cmd->argv[argc] = 0;) 117.9499 Tj 0 -455.6813 Td (7345 cmd->eargv[argc] = 0;) 122.3184 Tj 0 -465.1747 Td (7346 return ret;) 78.6333 Tj 0 -474.668 Td (7347 }) 26.2111 Tj 0 -484.1614 Td (7348 ) 21.8426 Tj 0 -493.6547 Td (7349 ) 21.8426 Tj 0 -522.1348 Td (Sheet 73) 34.9481 Tj Q Q q 180 500 5760 3460 re W /DeviceGray {} CS [0] SC /DeviceGray {} cs [0] sc q [10 0 0 10 0 0] cm [1 0 0 1 0 0] Tm 0 0 Td [0 -0.9679 1 0 564.72 392.865] Tm 0 0 Td /F8_0 8.7022 Tf (Sep 3 00:44 2009 xv6/sh.c Page 11) 157.2665 Tj 0 -28.4801 Td (7350 // NUL-terminate all the counted strings.) 200.9517 Tj 0 -37.9735 Td (7351 struct cmd*) 69.8962 Tj 0 -47.4668 Td (7352 nulterminate$struct cmd *cmd$) 148.5295 Tj 0 -56.9602 Td (7353 {) 26.2111 Tj 0 -66.4535 Td (7354 int i;) 56.7907 Tj 0 -75.9469 Td (7355 struct backcmd *bcmd;) 122.3184 Tj 0 -85.4403 Td (7356 struct execcmd *ecmd;) 122.3184 Tj 0 -94.9336 Td (7357 struct listcmd *lcmd;) 122.3184 Tj 0 -104.427 Td (7358 struct pipecmd *pcmd;) 122.3184 Tj 0 -113.9203 Td (7359 struct redircmd *rcmd;) 126.6869 Tj 0 -123.4137 Td (7360 ) 21.8426 Tj 0 -132.9071 Td (7361 if$cmd == 0$) 83.0018 Tj 0 -142.4004 Td (7362 return 0;) 78.6333 Tj 0 -151.8938 Td (7363 ) 21.8426 Tj 0 -161.3871 Td (7364 switch$cmd->type${) 109.2129 Tj 0 -170.8805 Td (7365 case EXEC:) 74.2647 Tj 0 -180.3739 Td (7366 ecmd = $struct execcmd*$cmd;) 161.635 Tj 0 -189.8672 Td (7367 for$i=0; ecmd->argv[i]; i++$) 161.635 Tj 0 -199.3606 Td (7368 *ecmd->eargv[i] = 0;) 135.4239 Tj 0 -208.8539 Td (7369 break;) 65.5277 Tj 0 -218.3473 Td (7370 ) 21.8426 Tj 0 -227.8407 Td (7371 case REDIR:) 78.6333 Tj 0 -237.334 Td (7372 rcmd = $struct redircmd*$cmd;) 166.0035 Tj 0 -246.8274 Td (7373 nulterminate$rcmd->cmd$;) 144.161 Tj 0 -256.3207 Td (7374 *rcmd->efile = 0;) 113.5814 Tj 0 -265.8141 Td (7375 break;) 65.5277 Tj 0 -275.3075 Td (7376 ) 21.8426 Tj 0 -284.8008 Td (7377 case PIPE:) 74.2647 Tj 0 -294.2942 Td (7378 pcmd = $struct pipecmd*$cmd;) 161.635 Tj 0 -303.7875 Td (7379 nulterminate$pcmd->left$;) 148.5295 Tj 0 -313.2809 Td (7380 nulterminate$pcmd->right$;) 152.898 Tj 0 -322.7743 Td (7381 break;) 65.5277 Tj 0 -332.2676 Td (7382 ) 21.8426 Tj 0 -341.761 Td (7383 case LIST:) 74.2647 Tj 0 -351.2543 Td (7384 lcmd = $struct listcmd*$cmd;) 161.635 Tj 0 -360.7477 Td (7385 nulterminate$lcmd->left$;) 148.5295 Tj 0 -370.2411 Td (7386 nulterminate$lcmd->right$;) 152.898 Tj 0 -379.7344 Td (7387 break;) 65.5277 Tj 0 -389.2278 Td (7388 ) 21.8426 Tj 0 -398.7211 Td (7389 case BACK:) 74.2647 Tj 0 -408.2145 Td (7390 bcmd = $struct backcmd*$cmd;) 161.635 Tj 0 -417.7079 Td (7391 nulterminate$bcmd->cmd$;) 144.161 Tj 0 -427.2012 Td (7392 break;) 65.5277 Tj 0 -436.6946 Td (7393 }) 34.9481 Tj 0 -446.1879 Td (7394 return cmd;) 78.6333 Tj 0 -455.6813 Td (7395 }) 26.2111 Tj 0 -465.1747 Td (7396 ) 21.8426 Tj 0 -474.668 Td (7397 ) 21.8426 Tj 0 -484.1614 Td (7398 ) 21.8426 Tj 0 -493.6547 Td (7399 ) 21.8426 Tj 0 -522.1348 Td (Sheet 73) 34.9481 Tj Q Q Q Q showpage %%PageTrailer pdfEndPage %%Trailer end %%DocumentSuppliedResources: %%+ font APYGPQ+LucidaSans-Typewriter83 %%EOF