From 4d972493b66d4841c135cf56414f9f54bac948bc Mon Sep 17 00:00:00 2001
From: Robert Morris <rtm@nephron.lcs.mit.edu>
Date: Mon, 30 Aug 2010 07:26:54 -0400
Subject: no more xv6.pdf .ps
---
xv6.ps | 23941 ---------------------------------------------------------------
1 file changed, 23941 deletions(-)
delete mode 100644 xv6.ps
(limited to 'xv6.ps')
diff --git a/xv6.ps b/xv6.ps
deleted file mode 100644
index d573f61..0000000
--- a/xv6.ps
+++ /dev/null
@@ -1,23941 +0,0 @@
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-(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
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-(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
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-0 0 612 792 re W
-%%EndPageSetup
-[] 0 d
-1 i
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-[0] sc
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-[0] SC
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-{} 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
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-%%PageOrientation: Landscape
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--612 -792 translate
-0 0 612 792 re W
-%%EndPageSetup
-[] 0 d
-1 i
-0 j
-0 J
-10 M
-1 w
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-[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
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-10 M
-1 w
-/DeviceGray {} cs
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-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
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-(1474 }) 26.2111 Tj
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-(1475 ) 21.8426 Tj
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-(1476 ) 21.8426 Tj
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-(1478 ) 21.8426 Tj
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-(1479 ) 21.8426 Tj
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-(1480 ) 21.8426 Tj
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-(1481 ) 21.8426 Tj
-0 -332.2676 Td
-(1482 ) 21.8426 Tj
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-(1483 ) 21.8426 Tj
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-(1484 ) 21.8426 Tj
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-(1485 ) 21.8426 Tj
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-(1486 ) 21.8426 Tj
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-(1487 ) 21.8426 Tj
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-(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
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-(1548 ) 21.8426 Tj
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-(1549 ) 21.8426 Tj
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-[0 -0.9679 1 0 564.72 392.865] Tm
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-(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
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-(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
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-(1595 ) 21.8426 Tj
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-(1596 ) 21.8426 Tj
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-(1597 ) 21.8426 Tj
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-(1598 ) 21.8426 Tj
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-(1599 ) 21.8426 Tj
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-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
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-(1606 #include "spinlock.h") 113.5814 Tj
-0 -94.9336 Td
-(1607 ) 21.8426 Tj
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-0 -113.9203 Td
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-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
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-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
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-(1624 ) 21.8426 Tj
-0 -265.8141 Td
-(1625 ) 21.8426 Tj
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-(1626 ) 21.8426 Tj
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-(1627 ) 21.8426 Tj
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-(1628 ) 21.8426 Tj
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-(1629 ) 21.8426 Tj
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-(1630 ) 21.8426 Tj
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-(1631 ) 21.8426 Tj
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-(1634 ) 21.8426 Tj
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-(1635 ) 21.8426 Tj
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-(1636 ) 21.8426 Tj
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-(1637 ) 21.8426 Tj
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-(1638 ) 21.8426 Tj
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-(1639 ) 21.8426 Tj
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-(1640 ) 21.8426 Tj
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-(1641 ) 21.8426 Tj
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-(1642 ) 21.8426 Tj
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-(1643 ) 21.8426 Tj
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-(1644 ) 21.8426 Tj
-0 -455.6813 Td
-(1645 ) 21.8426 Tj
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-(1646 ) 21.8426 Tj
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-(1647 ) 21.8426 Tj
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-(1648 ) 21.8426 Tj
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-(1649 ) 21.8426 Tj
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-(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\
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-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
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-(1686 ) 21.8426 Tj
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-(1687 ) 21.8426 Tj
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-(1688 ) 21.8426 Tj
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-(1689 ) 21.8426 Tj
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-(1690 ) 21.8426 Tj
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-(1692 ) 21.8426 Tj
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-(1693 ) 21.8426 Tj
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-(1694 ) 21.8426 Tj
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-(1695 ) 21.8426 Tj
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-(1696 ) 21.8426 Tj
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-(1697 ) 21.8426 Tj
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-(1698 ) 21.8426 Tj
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-(1699 ) 21.8426 Tj
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-(Sheet 16) 34.9481 Tj
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-(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
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-(Sheet 19) 34.9481 Tj
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-(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
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-(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
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-[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
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-(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
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-(Sheet 21) 34.9481 Tj
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-0 0 Td
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-(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
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-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
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-0 -322.7743 Td
-(3181 // Inodes per block.) 109.2129 Tj
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-(3182 #define IPB \(BSIZE / sizeof\(struct dinode\)\)) 253.3738 Tj
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-(3183 ) 21.8426 Tj
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-(3184 // Block containing inode i) 139.7925 Tj
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-(3185 #define IBLOCK\(i\) \(\(i\) / IPB + 2\)) 183.4776 Tj
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-(3186 ) 21.8426 Tj
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-(3188 #define BPB \(BSIZE*8\)) 157.2665 Tj
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-(3245 ) 21.8426 Tj
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-(3247 ) 21.8426 Tj
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-(Sep 3 00:44 2009 xv6/file.h Page 1) 161.635 Tj
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-(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
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-0 -75.9469 Td
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-0 -104.427 Td
-(3258 };) 30.5796 Tj
-0 -113.9203 Td
-(3259 ) 21.8426 Tj
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-(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
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-0 -161.3871 Td
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-0 -170.8805 Td
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-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
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-0 -227.8407 Td
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-0 -237.334 Td
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-0 -246.8274 Td
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-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
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-(3278 #define I_VALID 0x2) 104.8443 Tj
-0 -303.7875 Td
-(3279 ) 21.8426 Tj
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-(3280 ) 21.8426 Tj
-0 -322.7743 Td
-(3281 // device implementations) 131.0554 Tj
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-(3282 ) 21.8426 Tj
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-(3287 ) 21.8426 Tj
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-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
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-(3305 #include "mmu.h") 91.7388 Tj
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-(3306 #include "proc.h") 96.1073 Tj
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-(3307 #include "x86.h") 91.7388 Tj
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-(3309 #include "spinlock.h") 113.5814 Tj
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-0 -132.9071 Td
-(3311 ) 21.8426 Tj
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-(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
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-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
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-0 -275.3075 Td
-(3326 ) 21.8426 Tj
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-(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
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-0 -379.7344 Td
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-0 -408.2145 Td
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-0 -417.7079 Td
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-(3342 ) 21.8426 Tj
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-(3343 ) 21.8426 Tj
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-(3344 ) 21.8426 Tj
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-(3345 ) 21.8426 Tj
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-(3349 ) 21.8426 Tj
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-(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
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-0 -56.9602 Td
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-0 -66.4535 Td
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-0 -94.9336 Td
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-0 -104.427 Td
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-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
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-0 -161.3871 Td
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-0 -170.8805 Td
-(3365 break;) 74.2647 Tj
-0 -180.3739 Td
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-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
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-(3372 ) 21.8426 Tj
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-(3373 // Start the request for b. Caller must hold idelock.) 257.7424 Tj
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-(3376 {) 26.2111 Tj
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-(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
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-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>\
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-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
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-false OP
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-(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
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-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
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-[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
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-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
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-[0] SC
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-0 0 612 792 re
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-[0.1 0 0 0.1 0 0] cm
-q
-180 3960 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
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-[0] sc
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-[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
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-[0] sc
-/DeviceGray {} CS
-[0] SC
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-false OP
-{} settransfer
-0 0 612 792 re
-W
-q
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-[0.1 0 0 0.1 0 0] cm
-q
-180 3960 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
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-[0] sc
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-[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
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-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
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-/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
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-180 500 5760 3460 re
-W
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-[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
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-/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
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-[10 0 0 10 0 0] cm
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-[0 -0.9679 1 0 564.72 738.865] Tm
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-(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
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-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
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-[0] sc
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-[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
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-/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
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-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
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-[10 0 0 10 0 0] cm
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-(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
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-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
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-(3986 ) 21.8426 Tj
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-(3987 ) 21.8426 Tj
-0 -389.2278 Td
-(3988 ) 21.8426 Tj
-0 -398.7211 Td
-(3989 ) 21.8426 Tj
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-(3990 ) 21.8426 Tj
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-(3992 ) 21.8426 Tj
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-(3993 ) 21.8426 Tj
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-(3997 ) 21.8426 Tj
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-(3998 ) 21.8426 Tj
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-(3999 ) 21.8426 Tj
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-(Sheet 39) 34.9481 Tj
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-(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
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-(4049 ) 21.8426 Tj
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-(Sheet 40) 34.9481 Tj
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-(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
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-%%PageOrientation: Landscape
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-(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\(tot=0; tot<n; tot+=m, off+=m, dst+=m\){) 214.0572 Tj
-0 -208.8539 Td
-(4119 bp = bread\(ip->dev, 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
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-(4130 ) 21.8426 Tj
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-(4131 ) 21.8426 Tj
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-(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\(tot=0; tot<n; tot+=m, off+=m, src+=m\){) 214.0572 Tj
-0 -208.8539 Td
-(4169 bp = bread\(ip->dev, 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
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-(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
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-(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
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-showpage
-%%PageTrailer
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-%%BeginPageSetup
-%%PageOrientation: Landscape
-pdfStartPage
-180 rotate
--612 -792 translate
-0 0 612 792 re W
-%%EndPageSetup
-[] 0 d
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-0 0 612 792 re
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-[0.1 0 0 0.1 0 0] cm
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-/DeviceGray {} CS
-[0] SC
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-[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
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-(4282 ) 21.8426 Tj
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-(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
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-(4292 ) 21.8426 Tj
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-(4293 ) 21.8426 Tj
-0 -446.1879 Td
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-(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
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-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
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-q
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-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
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-(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
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-(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
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-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
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-[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
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-(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
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-0 -94.9336 Td
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-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
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-0 -151.8938 Td
-(4463 ff = *f;) 65.5277 Tj
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-0 -170.8805 Td
-(4465 f->type = FD_NONE;) 109.2129 Tj
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-0 -189.8672 Td
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-0 -208.8539 Td
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-0 -218.3473 Td
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-0 -237.334 Td
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-0 -256.3207 Td
-(4474 // Get metadata about file f.) 148.5295 Tj
-0 -265.8141 Td
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-0 -284.8008 Td
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-0 -303.7875 Td
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-0 -313.2809 Td
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-0 -322.7743 Td
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-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
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-(4487 ) 21.8426 Tj
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-(4497 ) 21.8426 Tj
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-(4498 ) 21.8426 Tj
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-(4499 ) 21.8426 Tj
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-(Sheet 44) 34.9481 Tj
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-0 -28.4801 Td
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-0 -37.9735 Td
-(4501 int) 34.9481 Tj
-0 -47.4668 Td
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-0 -56.9602 Td
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-0 -123.4137 Td
-(4510 if\(f->type == FD_INODE\){) 135.4239 Tj
-0 -132.9071 Td
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-0 -142.4004 Td
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-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
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-0 -189.8672 Td
-(4517 panic\("fileread"\);) 109.2129 Tj
-0 -199.3606 Td
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-(4519 ) 21.8426 Tj
-0 -218.3473 Td
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-0 -246.8274 Td
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-0 -265.8141 Td
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-0 -275.3075 Td
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-0 -294.2942 Td
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-0 -313.2809 Td
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-0 -322.7743 Td
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-0 -351.2543 Td
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-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
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-(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
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-(4555 #include "proc.h") 96.1073 Tj
-0 -85.4403 Td
-(4556 #include "fs.h") 87.3703 Tj
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-(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\
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-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
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-0 -161.3871 Td
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-0 -180.3739 Td
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-(4567 ) 21.8426 Tj
-0 -199.3606 Td
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-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
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-(4573 *pfd = fd;) 83.0018 Tj
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-0 -284.8008 Td
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-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
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-0 -341.761 Td
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-0 -360.7477 Td
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-0 -379.7344 Td
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-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
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-0 -436.6946 Td
-(4593 }) 26.2111 Tj
-0 -446.1879 Td
-(4594 ) 21.8426 Tj
-0 -455.6813 Td
-(4595 ) 21.8426 Tj
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-(4596 ) 21.8426 Tj
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-(4597 ) 21.8426 Tj
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-(4598 ) 21.8426 Tj
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-(4599 ) 21.8426 Tj
-0 -522.1348 Td
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-0 -113.9203 Td
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-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\(de\); off<dp->size; 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<elf.phnum; i++, off+=sizeof\(\
-ph\)\){) 288.322 Tj
-0 -351.2543 Td
-(5034 if\(readi\(ip, \(char*\)&ph, off, sizeof\(ph\)\) != si\
-zeof\(ph\)\)) 283.9534 Tj
-0 -360.7477 Td
-(5035 goto bad;) 87.3703 Tj
-0 -370.2411 Td
-(5036 if\(ph.type != ELF_PROG_LOAD\)) 161.635 Tj
-0 -379.7344 Td
-(5037 continue;) 87.3703 Tj
-0 -389.2278 Td
-(5038 if\(ph.memsz < ph.filesz\)) 144.161 Tj
-0 -398.7211 Td
-(5039 goto bad;) 87.3703 Tj
-0 -408.2145 Td
-(5040 sz += ph.memsz;) 104.8443 Tj
-0 -417.7079 Td
-(5041 }) 34.9481 Tj
-0 -427.2012 Td
-(5042 ) 21.8426 Tj
-0 -436.6946 Td
-(5043 // Arguments.) 87.3703 Tj
-0 -446.1879 Td
-(5044 arglen = 0;) 78.6333 Tj
-0 -455.6813 Td
-(5045 for\(argc=0; argv[argc]; argc++\)) 166.0035 Tj
-0 -465.1747 Td
-(5046 arglen += strlen\(argv[argc]\) + 1;) 183.4776 Tj
-0 -474.668 Td
-(5047 arglen = \(arglen+3\) & ~3;) 139.7925 Tj
-0 -484.1614 Td
-(5048 sz += arglen;) 87.3703 Tj
-0 -493.6547 Td
-(5049 sz += 4*\(argc+1\); // argv data) 166.0035 Tj
-0 -522.1348 Td
-(Sheet 50) 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/exec.c Page 2) 161.635 Tj
-0 -28.4801 Td
-(5050 sz += 4; // argv) 104.8443 Tj
-0 -37.9735 Td
-(5051 sz += 4; // argc) 104.8443 Tj
-0 -47.4668 Td
-(5052 ) 21.8426 Tj
-0 -56.9602 Td
-(5053 // Stack.) 69.8962 Tj
-0 -66.4535 Td
-(5054 sz += PAGE;) 78.6333 Tj
-0 -75.9469 Td
-(5055 ) 21.8426 Tj
-0 -85.4403 Td
-(5056 // Allocate program memory.) 148.5295 Tj
-0 -94.9336 Td
-(5057 sz = \(sz+PAGE-1\) & ~\(PAGE-1\);) 157.2665 Tj
-0 -104.427 Td
-(5058 mem = kalloc\(sz\);) 104.8443 Tj
-0 -113.9203 Td
-(5059 if\(mem == 0\)) 83.0018 Tj
-0 -123.4137 Td
-(5060 goto bad;) 78.6333 Tj
-0 -132.9071 Td
-(5061 memset\(mem, 0, sz\);) 113.5814 Tj
-0 -142.4004 Td
-(5062 ) 21.8426 Tj
-0 -151.8938 Td
-(5063 // Load program into memory.) 152.898 Tj
-0 -161.3871 Td
-(5064 for\(i=0, off=elf.phoff; i<elf.phnum; i++, off+=sizeof\(\
-ph\)\){) 288.322 Tj
-0 -170.8805 Td
-(5065 if\(readi\(ip, \(char*\)&ph, off, sizeof\(ph\)\) != si\
-zeof\(ph\)\)) 283.9534 Tj
-0 -180.3739 Td
-(5066 goto bad;) 87.3703 Tj
-0 -189.8672 Td
-(5067 if\(ph.type != ELF_PROG_LOAD\)) 161.635 Tj
-0 -199.3606 Td
-(5068 continue;) 87.3703 Tj
-0 -208.8539 Td
-(5069 if\(ph.va + ph.memsz < ph.va || ph.va + ph.memsz > sz\)) 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
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-0 -398.7211 Td
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-0 -417.7079 Td
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-0 -446.1879 Td
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-(5345 ) 21.8426 Tj
-0 -465.1747 Td
-(5346 ) 21.8426 Tj
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-(5347 ) 21.8426 Tj
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-(5348 ) 21.8426 Tj
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-(Sheet 53) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
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-[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
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-/F8_0 8.7022 Tf
-(Sep 3 00:44 2009 xv6/string.c Page 2) 170.3721 Tj
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-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
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-0 -94.9336 Td
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-0 -104.427 Td
-(5358 }) 26.2111 Tj
-0 -113.9203 Td
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-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
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-0 -208.8539 Td
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-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
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-0 -294.2942 Td
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-0 -313.2809 Td
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-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
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-0 -398.7211 Td
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-0 -408.2145 Td
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-0 -417.7079 Td
-(5391 int n;) 56.7907 Tj
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-0 -436.6946 Td
-(5393 for\(n = 0; s[n]; n++\)) 122.3184 Tj
-0 -446.1879 Td
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-0 -455.6813 Td
-(5395 return n;) 69.8962 Tj
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-(5396 }) 26.2111 Tj
-0 -474.668 Td
-(5397 ) 21.8426 Tj
-0 -484.1614 Td
-(5398 ) 21.8426 Tj
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-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
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-(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
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-0 -132.9071 Td
-(5411 };) 30.5796 Tj
-0 -142.4004 Td
-(5412 ) 21.8426 Tj
-0 -151.8938 Td
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-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
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-0 -265.8141 Td
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-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
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-(5437 };) 30.5796 Tj
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-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
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-(Sheet 54) 34.9481 Tj
-Q
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-q
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-/DeviceGray {} CS
-[0] SC
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-[0] sc
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-[1 0 0 1 0 0] Tm
-0 0 Td
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-(Sep 3 00:44 2009 xv6/mp.h Page 2) 152.898 Tj
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-(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
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-(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
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-(5461 ) 21.8426 Tj
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-(5462 ) 21.8426 Tj
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-(5463 ) 21.8426 Tj
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-(5464 ) 21.8426 Tj
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-(5465 ) 21.8426 Tj
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-(5466 ) 21.8426 Tj
-0 -189.8672 Td
-(5467 ) 21.8426 Tj
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-(5468 ) 21.8426 Tj
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-(5469 ) 21.8426 Tj
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-(5470 ) 21.8426 Tj
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-(5472 ) 21.8426 Tj
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-(5476 ) 21.8426 Tj
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-(5497 ) 21.8426 Tj
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-(5498 ) 21.8426 Tj
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-(5499 ) 21.8426 Tj
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-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
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-(5504 #include "types.h") 100.4758 Tj
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-(5506 #include "param.h") 100.4758 Tj
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-0 -104.427 Td
-(5508 #include "x86.h") 91.7388 Tj
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-(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
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-0 -189.8672 Td
-(5517 ) 21.8426 Tj
-0 -199.3606 Td
-(5518 int) 34.9481 Tj
-0 -208.8539 Td
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-(5523 ) 21.8426 Tj
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-0 -265.8141 Td
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-0 -284.8008 Td
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-0 -294.2942 Td
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-0 -313.2809 Td
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-0 -322.7743 Td
-(5531 sum += addr[i];) 104.8443 Tj
-0 -332.2676 Td
-(5532 return sum;) 78.6333 Tj
-0 -341.761 Td
-(5533 }) 26.2111 Tj
-0 -351.2543 Td
-(5534 ) 21.8426 Tj
-0 -360.7477 Td
-(5535 // Look for an MP structure in the len bytes at addr.) 253.3738 Tj
-0 -370.2411 Td
-(5536 static struct mp*) 96.1073 Tj
-0 -379.7344 Td
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-0 -389.2278 Td
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-0 -398.7211 Td
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-0 -408.2145 Td
-(5540 ) 21.8426 Tj
-0 -417.7079 Td
-(5541 e = addr+len;) 87.3703 Tj
-0 -427.2012 Td
-(5542 for\(p = addr; p < e; p += sizeof\(struct mp\)\)) 222.7942 Tj
-0 -436.6946 Td
-(5543 if\(memcmp\(p, "_MP_", 4\) == 0 && sum\(p, sizeof\(str\
-uct mp\)\) == 0\)) 314.533 Tj
-0 -446.1879 Td
-(5544 return \(struct mp*\)p;) 139.7925 Tj
-0 -455.6813 Td
-(5545 return 0;) 69.8962 Tj
-0 -465.1747 Td
-(5546 }) 26.2111 Tj
-0 -474.668 Td
-(5547 ) 21.8426 Tj
-0 -484.1614 Td
-(5548 ) 21.8426 Tj
-0 -493.6547 Td
-(5549 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 55) 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
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-(Sep 3 00:44 2009 xv6/mp.c Page 2) 152.898 Tj
-0 -28.4801 Td
-(5550 // Search for the MP Floating Pointer Structure, which acc\
-ording to the) 332.0071 Tj
-0 -37.9735 Td
-(5551 // spec is in one of the following three locations:) 244.6368 Tj
-0 -47.4668 Td
-(5552 // 1\) in the first KB of the EBDA;) 170.3721 Tj
-0 -56.9602 Td
-(5553 // 2\) in the last KB of system base memory;) 209.6887 Tj
-0 -66.4535 Td
-(5554 // 3\) in the BIOS ROM between 0xE0000 and 0xFFFFF.) 240.2683 Tj
-0 -75.9469 Td
-(5555 static struct mp*) 96.1073 Tj
-0 -85.4403 Td
-(5556 mpsearch\(void\)) 83.0018 Tj
-0 -94.9336 Td
-(5557 {) 26.2111 Tj
-0 -104.427 Td
-(5558 uchar *bda;) 78.6333 Tj
-0 -113.9203 Td
-(5559 uint p;) 61.1592 Tj
-0 -123.4137 Td
-(5560 struct mp *mp;) 91.7388 Tj
-0 -132.9071 Td
-(5561 ) 21.8426 Tj
-0 -142.4004 Td
-(5562 bda = \(uchar*\)0x400;) 117.9499 Tj
-0 -151.8938 Td
-(5563 if\(\(p = \(\(bda[0x0F]<<8\)|bda[0x0E]\) << 4\)\){) 214.0572 Tj
-0 -161.3871 Td
-(5564 if\(\(mp = mpsearch1\(\(uchar*\)p, 1024\)\)\)) 200.9517 Tj
-0 -170.8805 Td
-(5565 return mp;) 91.7388 Tj
-0 -180.3739 Td
-(5566 } else {) 65.5277 Tj
-0 -189.8672 Td
-(5567 p = \(\(bda[0x14]<<8\)|bda[0x13]\)*1024;) 196.5831 Tj
-0 -199.3606 Td
-(5568 if\(\(mp = mpsearch1\(\(uchar*\)p-1024, 1024\)\)\)) 222.7942 Tj
-0 -208.8539 Td
-(5569 return mp;) 91.7388 Tj
-0 -218.3473 Td
-(5570 }) 34.9481 Tj
-0 -227.8407 Td
-(5571 return mpsearch1\(\(uchar*\)0xF0000, 0x10000\);) 218.4257 Tj
-0 -237.334 Td
-(5572 }) 26.2111 Tj
-0 -246.8274 Td
-(5573 ) 21.8426 Tj
-0 -256.3207 Td
-(5574 // Search for an MP configuration table. For now,) 240.2683 Tj
-0 -265.8141 Td
-(5575 // don't accept the default configurations \(physaddr == 0\
-\).) 279.5849 Tj
-0 -275.3075 Td
-(5576 // Check for correct signature, calculate the checksum and\
-,) 279.5849 Tj
-0 -284.8008 Td
-(5577 // if correct, check the version.) 166.0035 Tj
-0 -294.2942 Td
-(5578 // To do: check extended table checksum.) 196.5831 Tj
-0 -303.7875 Td
-(5579 static struct mpconf*) 113.5814 Tj
-0 -313.2809 Td
-(5580 mpconfig\(struct mp **pmp\)) 131.0554 Tj
-0 -322.7743 Td
-(5581 {) 26.2111 Tj
-0 -332.2676 Td
-(5582 struct mpconf *conf;) 117.9499 Tj
-0 -341.761 Td
-(5583 struct mp *mp;) 91.7388 Tj
-0 -351.2543 Td
-(5584 ) 21.8426 Tj
-0 -360.7477 Td
-(5585 if\(\(mp = mpsearch\(\)\) == 0 || mp->physaddr == 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; p<e; \){) 292.6905 Tj
-0 -170.8805 Td
-(5615 switch\(*p\){) 87.3703 Tj
-0 -180.3739 Td
-(5616 case MPPROC:) 91.7388 Tj
-0 -189.8672 Td
-(5617 proc = \(struct mpproc*\)p;) 157.2665 Tj
-0 -199.3606 Td
-(5618 if\(ncpu != proc->apicid\) {) 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 & ~\(1<<IRQ_SLAVE\);) 235.8998 Tj
-0 -170.8805 Td
-(5965 ) 21.8426 Tj
-0 -180.3739 Td
-(5966 static void) 69.8962 Tj
-0 -189.8672 Td
-(5967 picsetmask\(ushort mask\)) 122.3184 Tj
-0 -199.3606 Td
-(5968 {) 26.2111 Tj
-0 -208.8539 Td
-(5969 irqmask = mask;) 96.1073 Tj
-0 -218.3473 Td
-(5970 outb\(IO_PIC1+1, mask\);) 126.6869 Tj
-0 -227.8407 Td
-(5971 outb\(IO_PIC2+1, mask >> 8\);) 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 & ~\(1<<irq\)\);) 170.3721 Tj
-0 -294.2942 Td
-(5978 }) 26.2111 Tj
-0 -303.7875 Td
-(5979 ) 21.8426 Tj
-0 -313.2809 Td
-(5980 // Initialize the 8259A interrupt controllers.) 222.7942 Tj
-0 -322.7743 Td
-(5981 void) 39.3166 Tj
-0 -332.2676 Td
-(5982 picinit\(void\)) 78.6333 Tj
-0 -341.761 Td
-(5983 {) 26.2111 Tj
-0 -351.2543 Td
-(5984 // mask all interrupts) 126.6869 Tj
-0 -360.7477 Td
-(5985 outb\(IO_PIC1+1, 0xFF\);) 126.6869 Tj
-0 -370.2411 Td
-(5986 outb\(IO_PIC2+1, 0xFF\);) 126.6869 Tj
-0 -379.7344 Td
-(5987 ) 21.8426 Tj
-0 -389.2278 Td
-(5988 // Set up master \(8259A-1\)) 144.161 Tj
-0 -398.7211 Td
-(5989 ) 21.8426 Tj
-0 -408.2145 Td
-(5990 // ICW1: 0001g0hi) 109.2129 Tj
-0 -417.7079 Td
-(5991 // g: 0 = edge triggering, 1 = level triggering) 253.3738 Tj
-0 -427.2012 Td
-(5992 // h: 0 = cascaded PICs, 1 = master only) 222.7942 Tj
-0 -436.6946 Td
-(5993 // i: 0 = no ICW4, 1 = ICW4 required) 205.3202 Tj
-0 -446.1879 Td
-(5994 outb\(IO_PIC1, 0x11\);) 117.9499 Tj
-0 -455.6813 Td
-(5995 ) 21.8426 Tj
-0 -465.1747 Td
-(5996 // ICW2: Vector offset) 131.0554 Tj
-0 -474.668 Td
-(5997 outb\(IO_PIC1+1, T_IRQ0\);) 135.4239 Tj
-0 -484.1614 Td
-(5998 ) 21.8426 Tj
-0 -493.6547 Td
-(5999 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 59) 34.9481 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
-%%Page: 67 67
-%%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/picirq.c Page 2) 170.3721 Tj
-0 -28.4801 Td
-(6000 // ICW3: \(master PIC\) bit mask of IR lines connected \
-to slaves) 305.796 Tj
-0 -37.9735 Td
-(6001 // \(slave PIC\) 3-bit # of slave's connection to\
- master) 297.059 Tj
-0 -47.4668 Td
-(6002 outb\(IO_PIC1+1, 1<<IRQ_SLAVE\);) 161.635 Tj
-0 -56.9602 Td
-(6003 ) 21.8426 Tj
-0 -66.4535 Td
-(6004 // ICW4: 000nbmap) 109.2129 Tj
-0 -75.9469 Td
-(6005 // n: 1 = special fully nested mode) 200.9517 Tj
-0 -85.4403 Td
-(6006 // b: 1 = buffered mode) 148.5295 Tj
-0 -94.9336 Td
-(6007 // m: 0 = slave PIC, 1 = master PIC) 200.9517 Tj
-0 -104.427 Td
-(6008 // \(ignored when b is 0, as the master/slave role) 266.4794 Tj
-0 -113.9203 Td
-(6009 // can be hardwired\).) 144.161 Tj
-0 -123.4137 Td
-(6010 // a: 1 = Automatic EOI mode) 170.3721 Tj
-0 -132.9071 Td
-(6011 // p: 0 = MCS-80/85 mode, 1 = intel x86 mode) 240.2683 Tj
-0 -142.4004 Td
-(6012 outb\(IO_PIC1+1, 0x3\);) 122.3184 Tj
-0 -151.8938 Td
-(6013 ) 21.8426 Tj
-0 -161.3871 Td
-(6014 // Set up slave \(8259A-2\)) 139.7925 Tj
-0 -170.8805 Td
-(6015 outb\(IO_PIC2, 0x11\); // ICW1) 227.1628 Tj
-0 -180.3739 Td
-(6016 outb\(IO_PIC2+1, T_IRQ0 + 8\); // ICW2) 209.6887 Tj
-0 -189.8672 Td
-(6017 outb\(IO_PIC2+1, IRQ_SLAVE\); // ICW3) 227.1628 Tj
-0 -199.3606 Td
-(6018 // NB Automatic EOI mode doesn't tend to work on the sla\
-ve.) 288.322 Tj
-0 -208.8539 Td
-(6019 // Linux source code says it's "to be investigated".) 257.7424 Tj
-0 -218.3473 Td
-(6020 outb\(IO_PIC2+1, 0x3\); // ICW4) 227.1628 Tj
-0 -227.8407 Td
-(6021 ) 21.8426 Tj
-0 -237.334 Td
-(6022 // OCW3: 0ef01prs) 109.2129 Tj
-0 -246.8274 Td
-(6023 // ef: 0x = NOP, 10 = clear specific mask, 11 = set s\
-pecific mask) 327.6386 Tj
-0 -256.3207 Td
-(6024 // p: 0 = no polling, 1 = polling mode) 214.0572 Tj
-0 -265.8141 Td
-(6025 // rs: 0x = NOP, 10 = read IRR, 11 = read ISR) 240.2683 Tj
-0 -275.3075 Td
-(6026 outb\(IO_PIC1, 0x68\); // clear specific mas\
-k) 270.8479 Tj
-0 -284.8008 Td
-(6027 outb\(IO_PIC1, 0x0a\); // read IRR by defaul\
-t) 270.8479 Tj
-0 -294.2942 Td
-(6028 ) 21.8426 Tj
-0 -303.7875 Td
-(6029 outb\(IO_PIC2, 0x68\); // OCW3) 205.3202 Tj
-0 -313.2809 Td
-(6030 outb\(IO_PIC2, 0x0a\); // OCW3) 205.3202 Tj
-0 -322.7743 Td
-(6031 ) 21.8426 Tj
-0 -332.2676 Td
-(6032 if\(irqmask != 0xFFFF\)) 122.3184 Tj
-0 -341.761 Td
-(6033 picsetmask\(irqmask\);) 126.6869 Tj
-0 -351.2543 Td
-(6034 }) 26.2111 Tj
-0 -360.7477 Td
-(6035 ) 21.8426 Tj
-0 -370.2411 Td
-(6036 ) 21.8426 Tj
-0 -379.7344 Td
-(6037 ) 21.8426 Tj
-0 -389.2278 Td
-(6038 ) 21.8426 Tj
-0 -398.7211 Td
-(6039 ) 21.8426 Tj
-0 -408.2145 Td
-(6040 ) 21.8426 Tj
-0 -417.7079 Td
-(6041 ) 21.8426 Tj
-0 -427.2012 Td
-(6042 ) 21.8426 Tj
-0 -436.6946 Td
-(6043 ) 21.8426 Tj
-0 -446.1879 Td
-(6044 ) 21.8426 Tj
-0 -455.6813 Td
-(6045 ) 21.8426 Tj
-0 -465.1747 Td
-(6046 ) 21.8426 Tj
-0 -474.668 Td
-(6047 ) 21.8426 Tj
-0 -484.1614 Td
-(6048 ) 21.8426 Tj
-0 -493.6547 Td
-(6049 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 60) 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 3) 170.3721 Tj
-0 -28.4801 Td
-(6050 // Blank page.) 83.0018 Tj
-0 -37.9735 Td
-(6051 ) 21.8426 Tj
-0 -47.4668 Td
-(6052 ) 21.8426 Tj
-0 -56.9602 Td
-(6053 ) 21.8426 Tj
-0 -66.4535 Td
-(6054 ) 21.8426 Tj
-0 -75.9469 Td
-(6055 ) 21.8426 Tj
-0 -85.4403 Td
-(6056 ) 21.8426 Tj
-0 -94.9336 Td
-(6057 ) 21.8426 Tj
-0 -104.427 Td
-(6058 ) 21.8426 Tj
-0 -113.9203 Td
-(6059 ) 21.8426 Tj
-0 -123.4137 Td
-(6060 ) 21.8426 Tj
-0 -132.9071 Td
-(6061 ) 21.8426 Tj
-0 -142.4004 Td
-(6062 ) 21.8426 Tj
-0 -151.8938 Td
-(6063 ) 21.8426 Tj
-0 -161.3871 Td
-(6064 ) 21.8426 Tj
-0 -170.8805 Td
-(6065 ) 21.8426 Tj
-0 -180.3739 Td
-(6066 ) 21.8426 Tj
-0 -189.8672 Td
-(6067 ) 21.8426 Tj
-0 -199.3606 Td
-(6068 ) 21.8426 Tj
-0 -208.8539 Td
-(6069 ) 21.8426 Tj
-0 -218.3473 Td
-(6070 ) 21.8426 Tj
-0 -227.8407 Td
-(6071 ) 21.8426 Tj
-0 -237.334 Td
-(6072 ) 21.8426 Tj
-0 -246.8274 Td
-(6073 ) 21.8426 Tj
-0 -256.3207 Td
-(6074 ) 21.8426 Tj
-0 -265.8141 Td
-(6075 ) 21.8426 Tj
-0 -275.3075 Td
-(6076 ) 21.8426 Tj
-0 -284.8008 Td
-(6077 ) 21.8426 Tj
-0 -294.2942 Td
-(6078 ) 21.8426 Tj
-0 -303.7875 Td
-(6079 ) 21.8426 Tj
-0 -313.2809 Td
-(6080 ) 21.8426 Tj
-0 -322.7743 Td
-(6081 ) 21.8426 Tj
-0 -332.2676 Td
-(6082 ) 21.8426 Tj
-0 -341.761 Td
-(6083 ) 21.8426 Tj
-0 -351.2543 Td
-(6084 ) 21.8426 Tj
-0 -360.7477 Td
-(6085 ) 21.8426 Tj
-0 -370.2411 Td
-(6086 ) 21.8426 Tj
-0 -379.7344 Td
-(6087 ) 21.8426 Tj
-0 -389.2278 Td
-(6088 ) 21.8426 Tj
-0 -398.7211 Td
-(6089 ) 21.8426 Tj
-0 -408.2145 Td
-(6090 ) 21.8426 Tj
-0 -417.7079 Td
-(6091 ) 21.8426 Tj
-0 -427.2012 Td
-(6092 ) 21.8426 Tj
-0 -436.6946 Td
-(6093 ) 21.8426 Tj
-0 -446.1879 Td
-(6094 ) 21.8426 Tj
-0 -455.6813 Td
-(6095 ) 21.8426 Tj
-0 -465.1747 Td
-(6096 ) 21.8426 Tj
-0 -474.668 Td
-(6097 ) 21.8426 Tj
-0 -484.1614 Td
-(6098 ) 21.8426 Tj
-0 -493.6547 Td
-(6099 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 60) 34.9481 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
-%%Page: 68 68
-%%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 1) 157.2665 Tj
-0 -28.4801 Td
-(6100 // PC keyboard interface constants) 170.3721 Tj
-0 -37.9735 Td
-(6101 ) 21.8426 Tj
-0 -47.4668 Td
-(6102 #define KBSTATP 0x64 // kbd controller status p\
-ort\(I\)) 301.4275 Tj
-0 -56.9602 Td
-(6103 #define KBS_DIB 0x01 // kbd data in buffer) 253.3738 Tj
-0 -66.4535 Td
-(6104 #define KBDATAP 0x60 // kbd data port\(I\)) 244.6368 Tj
-0 -75.9469 Td
-(6105 ) 21.8426 Tj
-0 -85.4403 Td
-(6106 #define NO 0) 131.0554 Tj
-0 -94.9336 Td
-(6107 ) 21.8426 Tj
-0 -104.427 Td
-(6108 #define SHIFT \(1<<0\)) 152.898 Tj
-0 -113.9203 Td
-(6109 #define CTL \(1<<1\)) 152.898 Tj
-0 -123.4137 Td
-(6110 #define ALT \(1<<2\)) 152.898 Tj
-0 -132.9071 Td
-(6111 ) 21.8426 Tj
-0 -142.4004 Td
-(6112 #define CAPSLOCK \(1<<3\)) 152.898 Tj
-0 -151.8938 Td
-(6113 #define NUMLOCK \(1<<4\)) 152.898 Tj
-0 -161.3871 Td
-(6114 #define SCROLLLOCK \(1<<5\)) 152.898 Tj
-0 -170.8805 Td
-(6115 ) 21.8426 Tj
-0 -180.3739 Td
-(6116 #define E0ESC \(1<<6\)) 152.898 Tj
-0 -189.8672 Td
-(6117 ) 21.8426 Tj
-0 -199.3606 Td
-(6118 // Special keycodes) 104.8443 Tj
-0 -208.8539 Td
-(6119 #define KEY_HOME 0xE0) 144.161 Tj
-0 -218.3473 Td
-(6120 #define KEY_END 0xE1) 144.161 Tj
-0 -227.8407 Td
-(6121 #define KEY_UP 0xE2) 144.161 Tj
-0 -237.334 Td
-(6122 #define KEY_DN 0xE3) 144.161 Tj
-0 -246.8274 Td
-(6123 #define KEY_LF 0xE4) 144.161 Tj
-0 -256.3207 Td
-(6124 #define KEY_RT 0xE5) 144.161 Tj
-0 -265.8141 Td
-(6125 #define KEY_PGUP 0xE6) 144.161 Tj
-0 -275.3075 Td
-(6126 #define KEY_PGDN 0xE7) 144.161 Tj
-0 -284.8008 Td
-(6127 #define KEY_INS 0xE8) 144.161 Tj
-0 -294.2942 Td
-(6128 #define KEY_DEL 0xE9) 144.161 Tj
-0 -303.7875 Td
-(6129 ) 21.8426 Tj
-0 -313.2809 Td
-(6130 // C\('A'\) == Control-A) 117.9499 Tj
-0 -322.7743 Td
-(6131 #define C\(x\) \(x - '@'\)) 117.9499 Tj
-0 -332.2676 Td
-(6132 ) 21.8426 Tj
-0 -341.761 Td
-(6133 static uchar shiftcode[256] =) 148.5295 Tj
-0 -351.2543 Td
-(6134 {) 26.2111 Tj
-0 -360.7477 Td
-(6135 [0x1D] CTL,) 78.6333 Tj
-0 -370.2411 Td
-(6136 [0x2A] SHIFT,) 87.3703 Tj
-0 -379.7344 Td
-(6137 [0x36] SHIFT,) 87.3703 Tj
-0 -389.2278 Td
-(6138 [0x38] ALT,) 78.6333 Tj
-0 -398.7211 Td
-(6139 [0x9D] CTL,) 78.6333 Tj
-0 -408.2145 Td
-(6140 [0xB8] ALT) 74.2647 Tj
-0 -417.7079 Td
-(6141 };) 30.5796 Tj
-0 -427.2012 Td
-(6142 ) 21.8426 Tj
-0 -436.6946 Td
-(6143 static uchar togglecode[256] =) 152.898 Tj
-0 -446.1879 Td
-(6144 {) 26.2111 Tj
-0 -455.6813 Td
-(6145 [0x3A] CAPSLOCK,) 100.4758 Tj
-0 -465.1747 Td
-(6146 [0x45] NUMLOCK,) 96.1073 Tj
-0 -474.668 Td
-(6147 [0x46] SCROLLLOCK) 104.8443 Tj
-0 -484.1614 Td
-(6148 };) 30.5796 Tj
-0 -493.6547 Td
-(6149 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 61) 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.h Page 2) 157.2665 Tj
-0 -28.4801 Td
-(6150 static uchar normalmap[256] =) 148.5295 Tj
-0 -37.9735 Td
-(6151 {) 26.2111 Tj
-0 -47.4668 Td
-(6152 NO, 0x1B, '1', '2', '3', '4', '5', '6', // 0x00) 270.8479 Tj
-0 -56.9602 Td
-(6153 '7', '8', '9', '0', '-', '=', '\\b', '\\t',) 235.8998 Tj
-0 -66.4535 Td
-(6154 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', // 0x10) 270.8479 Tj
-0 -75.9469 Td
-(6155 'o', 'p', '[', ']', '\\n', NO, 'a', 's',) 231.5313 Tj
-0 -85.4403 Td
-(6156 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', // 0x20) 270.8479 Tj
-0 -94.9336 Td
-(6157 '\\'', '`', NO, '\\\\', 'z', 'x', 'c', 'v',) 231.5313 Tj
-0 -104.427 Td
-(6158 'b', 'n', 'm', ',', '.', '/', NO, '*', // 0x30) 270.8479 Tj
-0 -113.9203 Td
-(6159 NO, ' ', NO, NO, NO, NO, NO, NO,) 227.1628 Tj
-0 -123.4137 Td
-(6160 NO, NO, NO, NO, NO, NO, NO, '7', // 0x40) 270.8479 Tj
-0 -132.9071 Td
-(6161 '8', '9', '-', '4', '5', '6', '+', '1',) 231.5313 Tj
-0 -142.4004 Td
-(6162 '2', '3', '0', '.', NO, NO, NO, NO, // 0x50) 270.8479 Tj
-0 -151.8938 Td
-(6163 [0x9C] '\\n', // KP_Enter) 157.2665 Tj
-0 -161.3871 Td
-(6164 [0xB5] '/', // KP_Div) 148.5295 Tj
-0 -170.8805 Td
-(6165 [0xC8] KEY_UP, [0xD0] KEY_DN,) 170.3721 Tj
-0 -180.3739 Td
-(6166 [0xC9] KEY_PGUP, [0xD1] KEY_PGDN,) 179.1091 Tj
-0 -189.8672 Td
-(6167 [0xCB] KEY_LF, [0xCD] KEY_RT,) 170.3721 Tj
-0 -199.3606 Td
-(6168 [0x97] KEY_HOME, [0xCF] KEY_END,) 174.7406 Tj
-0 -208.8539 Td
-(6169 [0xD2] KEY_INS, [0xD3] KEY_DEL) 170.3721 Tj
-0 -218.3473 Td
-(6170 };) 30.5796 Tj
-0 -227.8407 Td
-(6171 ) 21.8426 Tj
-0 -237.334 Td
-(6172 static uchar shiftmap[256] =) 144.161 Tj
-0 -246.8274 Td
-(6173 {) 26.2111 Tj
-0 -256.3207 Td
-(6174 NO, 033, '!', '@', '#', '$', '%', '^', // 0x00) 270.8479 Tj
-0 -265.8141 Td
-(6175 '&', '*', '\(', '\)', '_', '+', '\\b', '\\t',) 235.8998 Tj
-0 -275.3075 Td
-(6176 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', // 0x10) 270.8479 Tj
-0 -284.8008 Td
-(6177 'O', 'P', '{', '}', '\\n', NO, 'A', 'S',) 231.5313 Tj
-0 -294.2942 Td
-(6178 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', // 0x20) 270.8479 Tj
-0 -303.7875 Td
-(6179 '"', '~', NO, '|', 'Z', 'X', 'C', 'V',) 231.5313 Tj
-0 -313.2809 Td
-(6180 'B', 'N', 'M', '<', '>', '?', 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
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-[0.1 0 0 0.1 0 0] cm
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-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
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-(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
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-(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
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-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
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-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
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-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
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-(Sheet 63) 34.9481 Tj
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-180 500 5760 3460 re
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-[0] SC
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-[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
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-(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
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-0 -180.3739 Td
-(6366 consputc\(c\);) 100.4758 Tj
-0 -189.8672 Td
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-0 -199.3606 Td
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-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
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-0 -265.8141 Td
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-0 -303.7875 Td
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-0 -389.2278 Td
-(6388 break;) 74.2647 Tj
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-(6390 // Print unknown % sequence to draw attention.) 249.0053 Tj
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-0 -436.6946 Td
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-0 -446.1879 Td
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-0 -455.6813 Td
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-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
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-(6402 {) 26.2111 Tj
-0 -56.9602 Td
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-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
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-(6445 ) 21.8426 Tj
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-(6446 ) 21.8426 Tj
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-(6447 ) 21.8426 Tj
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-(6450 #define BACKSPACE 0x100) 122.3184 Tj
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-(6451 #define CRTPORT 0x3d4) 113.5814 Tj
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-(6452 static ushort *crt = \(ushort*\)0xb8000; // CGA memory) 253.3738 Tj
-0 -56.9602 Td
-(6453 ) 21.8426 Tj
-0 -66.4535 Td
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-0 -75.9469 Td
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-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
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-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
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-(6474 memmove\(crt, crt+80, sizeof\(crt[0]\)*23*80\);) 227.1628 Tj
-0 -265.8141 Td
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-0 -275.3075 Td
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-;) 253.3738 Tj
-0 -284.8008 Td
-(6477 }) 34.9481 Tj
-0 -294.2942 Td
-(6478 ) 21.8426 Tj
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-(6479 outb\(CRTPORT, 14\);) 109.2129 Tj
-0 -313.2809 Td
-(6480 outb\(CRTPORT+1, pos>>8\);) 135.4239 Tj
-0 -322.7743 Td
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-0 -351.2543 Td
-(6484 }) 26.2111 Tj
-0 -360.7477 Td
-(6485 ) 21.8426 Tj
-0 -370.2411 Td
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-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
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-0 -474.668 Td
-(6497 }) 26.2111 Tj
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-(6498 ) 21.8426 Tj
-0 -493.6547 Td
-(6499 ) 21.8426 Tj
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-%%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
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-(6745 ) 21.8426 Tj
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-(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
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-(Sheet 67) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
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-[0] sc
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-[10 0 0 10 0 0] cm
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-(Sep 3 00:44 2009 xv6/usys.S Page 1) 161.635 Tj
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-(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
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-(Sheet 67) 34.9481 Tj
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-Q
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-%%PageTrailer
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-%%PageOrientation: Landscape
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-[] 0 d
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-[0.1 0 0 0.1 0 0] cm
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-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
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-[0 -0.9679 1 0 564.72 738.865] Tm
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-(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
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-(6841 ) 21.8426 Tj
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-(6843 ) 21.8426 Tj
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-(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
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-180 500 5760 3460 re
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-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
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-[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
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-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
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-[0.1 0 0 0.1 0 0] cm
-q
-180 3960 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
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-[0] sc
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-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
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-[0 -0.9679 1 0 564.72 738.865] Tm
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-(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
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-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
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-0 -85.4403 Td
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-0 -94.9336 Td
-(6907 {) 26.2111 Tj
-0 -104.427 Td
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-0 -113.9203 Td
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-0 -123.4137 Td
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-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
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-[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
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-0 -66.4535 Td
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-0 -75.9469 Td
-(7005 ) 21.8426 Tj
-0 -85.4403 Td
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-0 -104.427 Td
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-0 -142.4004 Td
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-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
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-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
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-hild.) 297.059 Tj
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-0 -218.3473 Td
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-0 -227.8407 Td
-(7021 printf\(2, "cannot cd %s\\n", buf+3\);) 209.6887 Tj
-0 -237.334 Td
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-0 -246.8274 Td
-(7023 }) 43.6851 Tj
-0 -256.3207 Td
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-0 -265.8141 Td
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-0 -275.3075 Td
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-0 -284.8008 Td
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-0 -294.2942 Td
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-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
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-0 -484.1614 Td
-(7048 ) 21.8426 Tj
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-0 -94.9336 Td
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-0 -104.427 Td
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-0 -113.9203 Td
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-0 -123.4137 Td
-(7060 return \(struct cmd*\)cmd;) 135.4239 Tj
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-(7062 ) 21.8426 Tj
-0 -151.8938 Td
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-0 -161.3871 Td
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- mode, int fd\)) 332.0071 Tj
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-0 -218.3473 Td
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-0 -237.334 Td
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-0 -265.8141 Td
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-0 -275.3075 Td
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-0 -313.2809 Td
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-0 -341.761 Td
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-0 -370.2411 Td
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-(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
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-(7092 ) 21.8426 Tj
-0 -436.6946 Td
-(7093 ) 21.8426 Tj
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-(7098 ) 21.8426 Tj
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-0 -47.4668 Td
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-0 -85.4403 Td
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-0 -94.9336 Td
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-0 -104.427 Td
-(7108 cmd->left = left;) 104.8443 Tj
-0 -113.9203 Td
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-(7110 return \(struct cmd*\)cmd;) 135.4239 Tj
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-(7112 ) 21.8426 Tj
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-0 -161.3871 Td
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-0 -208.8539 Td
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-0 -218.3473 Td
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-0 -227.8407 Td
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-(7123 }) 26.2111 Tj
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-0 -341.761 Td
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-0 -484.1614 Td
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-0 -28.4801 Td
-(7200 int) 34.9481 Tj
-0 -37.9735 Td
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-0 -56.9602 Td
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-0 -66.4535 Td
-(7204 ) 21.8426 Tj
-0 -75.9469 Td
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-0 -85.4403 Td
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-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
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-0 -199.3606 Td
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-0 -237.334 Td
-(7222 ) 21.8426 Tj
-0 -246.8274 Td
-(7223 es = s + strlen\(s\);) 113.5814 Tj
-0 -256.3207 Td
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-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
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-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
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-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
--
cgit v1.2.3