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-(0852 1129 5028) 61.1592 Tj
--11035.5 TJm
-(4610) 17.4741 Tj
-0 -341.7598 Td
-(ELF_PROG_LOAD 0886) 78.6333 Tj
--9028.81 TJm
-(fileinit 4414) 56.7907 Tj
-17.4613 -351.2532 Td
-(0886 5036 5067) 61.1592 Tj
--11035.5 TJm
-(0228 1228 4414) 61.1592 Tj
-0 -360.7465 Td
-(EOI 5663) 34.9481 Tj
--14045.5 TJm
-(fileread 4502) 56.7907 Tj
-17.4613 -370.2399 Td
-(5663 5734 5775) 61.1592 Tj
--11035.5 TJm
-(0229 4502 4517 4623) 83.0018 Tj
-0 -379.7332 Td
-(ERROR 5681) 43.6851 Tj
--13042.1 TJm
-(filestat 4476) 56.7907 Tj
-17.4613 -389.2266 Td
-(5681 5727) 39.3166 Tj
--13543.8 TJm
-(0230 4476 4658) 61.1592 Tj
-0 -398.72 Td
-(ESR 5666) 34.9481 Tj
--14045.5 TJm
-(filewrite 4522) 61.1592 Tj
-17.4613 -408.2133 Td
-(5666 5730 5731) 61.1592 Tj
--11035.5 TJm
-(0231 4522 4537 4635) 83.0018 Tj
-0 -417.7067 Td
-(EXEC 6857) 39.3166 Tj
--13543.8 TJm
-(FL_IF 0660) 43.6851 Tj
-17.4613 -427.2 Td
-(6857 6922 7059 7365) 83.0018 Tj
--8527.14 TJm
-(0660 1462 1468 1821) 83.0018 Tj
-0 -436.6934 Td
-(exec 5009) 39.3166 Tj
--15550.3 TJm
-(1963 5758) 39.3166 Tj
-17.4613 -446.1868 Td
-(0222 4972 5009 6768) 83.0018 Tj
--6520.6 TJm
-(fork 1854) 39.3166 Tj
-17.4613 -455.6801 Td
-(6829 6830 6926 6927) 83.0018 Tj
--8527.14 TJm
-(0303 1854 2910 6760) 83.0018 Tj
-0 -465.1735 Td
-(execcmd 6869 7053) 74.2647 Tj
--11537 TJm
-(6823 6825 7043 7045) 83.0018 Tj
-17.4613 -474.6665 Td
-(6869 6910 6923 7053) 83.0018 Tj
--6520.6 TJm
-(fork1 7039) 43.6851 Tj
-17.4613 -484.1598 Td
-(7055 7321 7327 7328) 83.0018 Tj
--8527.14 TJm
-(6900 6942 6954 6961) 83.0018 Tj
-17.4613 -493.6532 Td
-(7356 7366) 39.3166 Tj
--13543.8 TJm
-(6976 7024 7039) 61.1592 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  cross-references  Page 4) 187.8461 Tj
-0 -28.4801 Td
-(forkret 1984) 52.4222 Tj
--14045.3 TJm
-(3317 3391) 39.3166 Tj
-17.4613 -37.9735 Td
-(1616 1790 1984) 61.1592 Tj
--9028.94 TJm
-(IDE_CMD_WRITE 3318) 78.6333 Tj
-0 -47.4664 Td
-(gatedesc 0801) 56.7907 Tj
--13543.7 TJm
-(3318 3388) 39.3166 Tj
-17.4613 -56.9598 Td
-(0464 0467 0801 2560) 83.0018 Tj
--6520.6 TJm
-(IDE_DF 3314) 48.0537 Tj
-0 -66.4531 Td
-(getcallerpcs 1426) 74.2647 Tj
--11537 TJm
-(3314 3338) 39.3166 Tj
-17.4613 -75.9465 Td
-(0322 1387 1426 1678) 83.0018 Tj
--6520.6 TJm
-(IDE_DRDY 3313) 56.7907 Tj
-17.4613 -85.4399 Td
-(6411) 17.4741 Tj
--16052.1 TJm
-(3313 3336) 39.3166 Tj
-0 -94.9332 Td
-(getcmd 6984) 48.0537 Tj
--12540.5 TJm
-(IDE_ERR 3315) 52.4222 Tj
-17.4613 -104.4266 Td
-(6984 7015) 39.3166 Tj
--13543.8 TJm
-(3315 3338) 39.3166 Tj
-0 -113.9199 Td
-(gettoken 7156) 56.7907 Tj
--11537.1 TJm
-(idtinit 2578) 52.4222 Tj
-17.4613 -123.4133 Td
-(7156 7241 7245 7257) 83.0018 Tj
--8527.14 TJm
-(0351 1259 2578) 61.1592 Tj
-17.4613 -132.9067 Td
-(7270 7271 7307 7311) 83.0018 Tj
--6520.6 TJm
-(idup 3888) 39.3166 Tj
-17.4613 -142.4 Td
-(7333) 17.4741 Tj
--16052.1 TJm
-(0237 1881 3888 4361) 83.0018 Tj
-0 -151.8934 Td
-(growproc 1834) 56.7907 Tj
--11537.1 TJm
-(iget 3853) 39.3166 Tj
-17.4613 -161.3867 Td
-(0304 1834 2959) 61.1592 Tj
--11035.5 TJm
-(3794 3818 3853 3873) 83.0018 Tj
-0 -170.8801 Td
-(havedisk1 3327) 61.1592 Tj
--13042 TJm
-(4234 4359) 39.3166 Tj
-17.4613 -180.3735 Td
-(3327 3364 3462) 61.1592 Tj
--9028.94 TJm
-(iinit 3789) 43.6851 Tj
-0 -189.8664 Td
-(holding 1444) 52.4222 Tj
--14045.3 TJm
-(0238 1229 3789) 61.1592 Tj
-17.4613 -199.3598 Td
-(0323 1376 1404 1444) 83.0018 Tj
--6520.6 TJm
-(ilock 3902) 43.6851 Tj
-17.4613 -208.8532 Td
-(1957) 17.4741 Tj
--16052.1 TJm
-(0239 3902 3908 3928) 83.0018 Tj
-0 -218.3465 Td
-(ialloc 3802) 48.0537 Tj
--14547 TJm
-(4364 4479 4511 4531) 83.0018 Tj
-17.4613 -227.8399 Td
-(0236 3802 3822 4820) 83.0018 Tj
--8527.14 TJm
-(4672 4683 4693 4762) 83.0018 Tj
-17.4613 -237.3332 Td
-(4821) 17.4741 Tj
--16052.1 TJm
-(4774 4809 4813 4823) 83.0018 Tj
-0 -246.8266 Td
-(IBLOCK 3185) 48.0537 Tj
--14547 TJm
-(4867 4937 5023 6563) 83.0018 Tj
-17.4613 -256.32 Td
-(3185 3811 3832 3917) 83.0018 Tj
--8527.14 TJm
-(6583 6610) 39.3166 Tj
-0 -265.8133 Td
-(ICRHI 5674) 43.6851 Tj
--13042.1 TJm
-(inb 0403) 34.9481 Tj
-17.4613 -275.3067 Td
-(5674 5737 5807 5819) 83.0018 Tj
--8527.14 TJm
-(0403 0928 0936 1154) 83.0018 Tj
-0 -284.8 Td
-(ICRLO 5667) 43.6851 Tj
--15048.7 TJm
-(3336 3363 5647 6264) 83.0018 Tj
-17.4613 -294.2934 Td
-(5667 5738 5739 5808) 83.0018 Tj
--8527.14 TJm
-(6267 6461 6463) 61.1592 Tj
-17.4613 -303.7868 Td
-(5810 5820) 39.3166 Tj
--11537.3 TJm
-(initlock 1361) 56.7907 Tj
-0 -313.2801 Td
-(ID 5660) 30.5796 Tj
-174.613 -313.2801 Td
-(0324 1361 1622 2283) 83.0018 Tj
-17.461 -322.7735 Td
-(5660 5693 5766) 61.1592 Tj
--11035.5 TJm
-(2574 3355 3543 3791) 83.0018 Tj
--0.0003 -332.2664 Td
-(ideinit 3351) 52.4222 Tj
--14045.3 TJm
-(4416 5185 6618 6619) 83.0018 Tj
-17.461 -341.7598 Td
-(0251 1230 3351) 61.1592 Tj
--9028.94 TJm
-(inode 3263) 43.6851 Tj
--0.0003 -351.2532 Td
-(ideintr 3402) 52.4222 Tj
--14045.3 TJm
-(0203 0234 0235 0236) 83.0018 Tj
-17.461 -360.7465 Td
-(0252 2624 3402) 61.1592 Tj
--11035.5 TJm
-(0237 0239 0240 0241) 83.0018 Tj
--0.0003 -370.2399 Td
-(idelock 3324) 52.4222 Tj
--14045.3 TJm
-(0242 0243 0245 0246) 83.0018 Tj
-17.461 -379.7332 Td
-(3324 3355 3407 3409) 83.0018 Tj
--8527.14 TJm
-(0247 0248 0249 1541) 83.0018 Tj
-17.461 -389.2266 Td
-(3428 3465 3480 3482) 83.0018 Tj
--8527.14 TJm
-(3256 3263 3284 3285) 83.0018 Tj
--0.0003 -398.72 Td
-(iderw 3454) 43.6851 Tj
--15048.7 TJm
-(3674 3785 3794 3801) 83.0018 Tj
-17.461 -408.2133 Td
-(0253 3454 3459 3461) 83.0018 Tj
--8527.14 TJm
-(3827 3852 3855 3861) 83.0018 Tj
-17.461 -417.7067 Td
-(3608 3619) 39.3166 Tj
--13543.8 TJm
-(3887 3888 3902 3934) 83.0018 Tj
--0.0003 -427.2 Td
-(idestart 3375) 56.7907 Tj
--13543.7 TJm
-(3952 3974 4010 4054) 83.0018 Tj
-17.461 -436.6934 Td
-(3328 3375 3378 3426) 83.0018 Tj
--8527.14 TJm
-(4085 4102 4152 4211) 83.0018 Tj
-17.461 -446.1868 Td
-(3475) 17.4741 Tj
--16052.1 TJm
-(4212 4252 4256 4353) 83.0018 Tj
--0.0003 -455.6801 Td
-(idewait 3332) 52.4222 Tj
--14045.3 TJm
-(4356 4388 4395 4666) 83.0018 Tj
-17.461 -465.1735 Td
-(3332 3358 3380 3416) 83.0018 Tj
--8527.14 TJm
-(4702 4753 4800 4804) 83.0018 Tj
--0.0003 -474.6665 Td
-(IDE_BSY 3312) 52.4222 Tj
--14045.3 TJm
-(4856 4904 4915 4933) 83.0018 Tj
-17.461 -484.1598 Td
-(3312 3336) 39.3166 Tj
--13543.8 TJm
-(5015 6551 6601) 61.1592 Tj
--0.0003 -493.6532 Td
-(IDE_CMD_READ 3317) 74.2647 Tj
--9530.47 TJm
-(INPUT_BUF 6500) 61.1592 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
-%%Page: 4 4
-%%BeginPageSetup
-%%PageOrientation: Landscape
-pdfStartPage
-180 rotate
--612 -792 translate
-0 0 612 792 re W
-%%EndPageSetup
-[] 0 d
-1 i
-0 j
-0 J
-10 M
-1 w
-/DeviceGray {} cs
-[0] sc
-/DeviceGray {} CS
-[0] SC
-false op
-false OP
-{} settransfer
-0 0 612 792 re
-W
-q
-q
-[0.1 0 0 0.1 0 0] cm
-q
-180 3960 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 738.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  cross-references  Page 5) 187.8461 Tj
-17.4613 -28.4801 Td
-(6500 6503 6524 6536) 83.0018 Tj
--8527.14 TJm
-(2432 2627 6625 6626) 83.0018 Tj
-17.4613 -37.9735 Td
-(6537 6539 6568) 61.1592 Tj
--9028.94 TJm
-(IRQ_SLAVE 5960) 61.1592 Tj
-0 -47.4664 Td
-(insl 0412) 39.3166 Tj
--15550.3 TJm
-(5960 5964 6002 6017) 83.0018 Tj
-17.4613 -56.9598 Td
-(0412 0414 1173 3417) 83.0018 Tj
--6520.6 TJm
-(IRQ_SPURIOUS 2436) 74.2647 Tj
-0 -66.4531 Td
-(INT_DISABLED 5869) 74.2647 Tj
--11537 TJm
-(2436 2636 5707) 61.1592 Tj
-17.4613 -75.9465 Td
-(5869 5917) 39.3166 Tj
--11537.3 TJm
-(IRQ_TIMER 2431) 61.1592 Tj
-0 -85.4399 Td
-(IOAPIC 5858) 48.0537 Tj
--14547 TJm
-(2431 2614 2671 5714) 83.0018 Tj
-17.4613 -94.9332 Td
-(5858 5908) 39.3166 Tj
--13543.8 TJm
-(6680) 17.4741 Tj
-0 -104.4266 Td
-(ioapic 5877) 48.0537 Tj
--12540.5 TJm
-(isdirempty 4702) 65.5277 Tj
-17.4613 -113.9199 Td
-(5607 5629 5630 5874) 83.0018 Tj
--8527.14 TJm
-(4702 4709 4778) 61.1592 Tj
-17.4613 -123.4133 Td
-(5877 5886 5887 5893) 83.0018 Tj
--6520.6 TJm
-(ismp 5514) 39.3166 Tj
-17.4613 -132.9067 Td
-(5894 5908) 39.3166 Tj
--13543.8 TJm
-(0277 1231 5514 5612) 83.0018 Tj
-0 -142.4 Td
-(ioapicenable 5923) 74.2647 Tj
--11537 TJm
-(5905 5925) 39.3166 Tj
-17.4613 -151.8934 Td
-(0256 3357 5923 6626) 83.0018 Tj
--6520.6 TJm
-(itrunc 4054) 48.0537 Tj
-0 -161.3867 Td
-(ioapicid 5516) 56.7907 Tj
--13543.7 TJm
-(3674 3961 4054) 61.1592 Tj
-17.4613 -170.8801 Td
-(0257 5516 5630 5911) 83.0018 Tj
--6520.6 TJm
-(iunlock 3934) 52.4222 Tj
-17.4613 -180.3735 Td
-(5912) 17.4741 Tj
--16052.1 TJm
-(0241 3934 3937 3976) 83.0018 Tj
-0 -189.8664 Td
-(ioapicinit 5901) 65.5277 Tj
--12540.3 TJm
-(4371 4481 4514 4534) 83.0018 Tj
-17.4613 -199.3598 Td
-(0258 1218 5901 5912) 83.0018 Tj
--8527.14 TJm
-(4679 4880 4942 6556) 83.0018 Tj
-0 -208.8532 Td
-(ioapicread 5884) 65.5277 Tj
--12540.3 TJm
-(6605) 17.4741 Tj
-17.4613 -218.3465 Td
-(5884 5909 5910) 61.1592 Tj
--9028.94 TJm
-(iunlockput 3974) 65.5277 Tj
-0 -227.8399 Td
-(ioapicwrite 5891) 69.8962 Tj
--12038.7 TJm
-(0242 3974 4366 4375) 83.0018 Tj
-17.4613 -237.3332 Td
-(5891 5917 5918 5931) 83.0018 Tj
--8527.14 TJm
-(4378 4674 4685 4688) 83.0018 Tj
-17.4613 -246.8266 Td
-(5932) 17.4741 Tj
--16052.1 TJm
-(4696 4766 4771 4779) 83.0018 Tj
-0 -256.32 Td
-(IO_PIC1 5957) 52.4222 Tj
--14045.3 TJm
-(4780 4791 4795 4812) 83.0018 Tj
-17.4613 -265.8133 Td
-(5957 5970 5985 5994) 83.0018 Tj
--8527.14 TJm
-(4816 4840 4869 4877) 83.0018 Tj
-17.4613 -275.3067 Td
-(5997 6002 6012 6026) 83.0018 Tj
--8527.14 TJm
-(4908 4925 4939 5077) 83.0018 Tj
-17.4613 -284.8 Td
-(6027) 17.4741 Tj
--16052.1 TJm
-(5118) 17.4741 Tj
-0 -294.2934 Td
-(IO_PIC2 5958) 52.4222 Tj
--12038.8 TJm
-(iupdate 3827) 52.4222 Tj
-17.4613 -303.7868 Td
-(5958 5971 5986 6015) 83.0018 Tj
--8527.14 TJm
-(0243 3827 3963 4080) 83.0018 Tj
-17.4613 -313.2801 Td
-(6016 6017 6020 6029) 83.0018 Tj
--8527.14 TJm
-(4178 4678 4695 4789) 83.0018 Tj
-17.4613 -322.7735 Td
-(6030) 17.4741 Tj
--16052.1 TJm
-(4794 4827 4831) 61.1592 Tj
-0 -332.2664 Td
-(IO_RTC 5786) 48.0537 Tj
--12540.5 TJm
-(I_BUSY 3277) 48.0537 Tj
-17.4613 -341.7598 Td
-(5786 5799 5800) 61.1592 Tj
--11035.5 TJm
-(3277 3911 3913 3936) 83.0018 Tj
-0 -351.2532 Td
-(IO_TIMER1 6659) 61.1592 Tj
--13042 TJm
-(3940 3957 3959) 61.1592 Tj
-17.4613 -360.7465 Td
-(6659 6668 6678 6679) 83.0018 Tj
--6520.6 TJm
-(I_VALID 3278) 52.4222 Tj
-0 -370.2399 Td
-(IPB 3182) 34.9481 Tj
--16052 TJm
-(3278 3916 3926 3955) 83.0018 Tj
-17.4613 -379.7332 Td
-(3182 3185 3191 3812) 83.0018 Tj
--6520.6 TJm
-(kalloc 2354) 48.0537 Tj
-17.4613 -389.2266 Td
-(3833 3918) 39.3166 Tj
--13543.8 TJm
-(0261 1283 1772 1812) 83.0018 Tj
-0 -398.72 Td
-(iput 3952) 39.3166 Tj
--15550.3 TJm
-(1838 1865 2354 2360) 83.0018 Tj
-17.4613 -408.2133 Td
-(0240 2120 3952 3958) 83.0018 Tj
--8527.14 TJm
-(2375 5058 5179) 61.1592 Tj
-17.4613 -417.7067 Td
-(3977 4260 4382 4471) 83.0018 Tj
--6520.6 TJm
-(KBDATAP 6104) 52.4222 Tj
-17.4613 -427.2 Td
-(4689 4943) 39.3166 Tj
--13543.8 TJm
-(6104 6267) 39.3166 Tj
-0 -436.6934 Td
-(IRQ_COM1 2433) 56.7907 Tj
--11537.1 TJm
-(kbdgetc 6256) 52.4222 Tj
-17.4613 -446.1868 Td
-(2433 2631) 39.3166 Tj
--13543.8 TJm
-(6256 6298) 39.3166 Tj
-0 -455.6801 Td
-(IRQ_ERROR 2435) 61.1592 Tj
--11035.5 TJm
-(kbdintr 6296) 52.4222 Tj
-17.4613 -465.1735 Td
-(2435 5727) 39.3166 Tj
--13543.8 TJm
-(0266 2628 6296) 61.1592 Tj
-0 -474.6665 Td
-(IRQ_IDE 2434) 52.4222 Tj
--12038.8 TJm
-(KBSTATP 6102) 52.4222 Tj
-17.4613 -484.1598 Td
-(2434 2623 3356 3357) 83.0018 Tj
--8527.14 TJm
-(6102 6264) 39.3166 Tj
-0 -493.6532 Td
-(IRQ_KBD 2432) 52.4222 Tj
--12038.8 TJm
-(KBS_DIB 6103) 52.4222 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  cross-references  Page 6) 187.8461 Tj
-17.4613 -28.4801 Td
-(6103 6265) 39.3166 Tj
--13543.8 TJm
-(0453 0461 0954 1054) 83.0018 Tj
-0 -37.9735 Td
-(KEY_DEL 6128) 52.4222 Tj
--14045.3 TJm
-(1711) 17.4741 Tj
-17.4613 -47.4664 Td
-(6128 6169 6191 6215) 83.0018 Tj
--6520.6 TJm
-(lidt 0467) 39.3166 Tj
-0 -56.9598 Td
-(KEY_DN 6122) 48.0537 Tj
--14547 TJm
-(0467 0475 2580) 61.1592 Tj
-17.4613 -66.4531 Td
-(6122 6165 6187 6211) 83.0018 Tj
--6520.6 TJm
-(LINT0 5679) 43.6851 Tj
-0 -75.9465 Td
-(KEY_END 6120) 52.4222 Tj
--14045.3 TJm
-(5679 5718) 39.3166 Tj
-17.4613 -85.4399 Td
-(6120 6168 6190 6214) 83.0018 Tj
--6520.6 TJm
-(LINT1 5680) 43.6851 Tj
-0 -94.9332 Td
-(KEY_HOME 6119) 56.7907 Tj
--13543.7 TJm
-(5680 5719) 39.3166 Tj
-17.4613 -104.4266 Td
-(6119 6168 6190 6214) 83.0018 Tj
--6520.6 TJm
-(LIST 6860) 39.3166 Tj
-0 -113.9199 Td
-(KEY_INS 6127) 52.4222 Tj
--14045.3 TJm
-(6860 6940 7107 7383) 83.0018 Tj
-17.4613 -123.4133 Td
-(6127 6169 6191 6215) 83.0018 Tj
--6520.6 TJm
-(listcmd 6890 7101) 74.2647 Tj
-0 -132.9067 Td
-(KEY_LF 6123) 48.0537 Tj
--14547 TJm
-(6890 6911 6941 7101) 83.0018 Tj
-17.4613 -142.4 Td
-(6123 6167 6189 6213) 83.0018 Tj
--8527.14 TJm
-(7103 7246 7357 7384) 83.0018 Tj
-0 -151.8934 Td
-(KEY_PGDN 6126) 56.7907 Tj
--11537.1 TJm
-(loadgs 0514) 48.0537 Tj
-17.4613 -161.3867 Td
-(6126 6166 6188 6212) 83.0018 Tj
--8527.14 TJm
-(0514 1712) 39.3166 Tj
-0 -170.8801 Td
-(KEY_PGUP 6125) 56.7907 Tj
--11537.1 TJm
-(ltr 0479) 34.9481 Tj
-17.4613 -180.3735 Td
-(6125 6166 6188 6212) 83.0018 Tj
--8527.14 TJm
-(0479 0481 1730) 61.1592 Tj
-0 -189.8664 Td
-(KEY_RT 6124) 48.0537 Tj
--12540.5 TJm
-(MAXARGS 6863) 52.4222 Tj
-17.4613 -199.3598 Td
-(6124 6167 6189 6213) 83.0018 Tj
--8527.14 TJm
-(6863 6871 6872 7340) 83.0018 Tj
-0 -208.8532 Td
-(KEY_UP 6121) 48.0537 Tj
--12540.5 TJm
-(MAXFILE 3169) 52.4222 Tj
-17.4613 -218.3465 Td
-(6121 6165 6187 6211) 83.0018 Tj
--8527.14 TJm
-(3169 4165 4166) 61.1592 Tj
-0 -227.8399 Td
-(kfree 2305) 43.6851 Tj
--13042.1 TJm
-(memcmp 5311) 48.0537 Tj
-17.4613 -237.3332 Td
-(0262 1843 1866 2169) 83.0018 Tj
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-17.4613 -104.427 Td
-(2608 2651 2658 2659) 83.0018 Tj
--8527.14 TJm
-(2090 2176 2183 2343) 83.0018 Tj
-17.4613 -113.9203 Td
-(2660 2666 2671 2675) 83.0018 Tj
--8527.14 TJm
-(2369 2373 2619 2975) 83.0018 Tj
-17.4613 -123.4137 Td
-(2754 2766 2778 2796) 83.0018 Tj
--8527.14 TJm
-(2980 3409 3428 3482) 83.0018 Tj
-17.4613 -132.9071 Td
-(2810 2812 2826 2878) 83.0018 Tj
--8527.14 TJm
-(3578 3592 3641 3864) 83.0018 Tj
-17.4613 -142.4004 Td
-(2880 2883 2884 2905) 83.0018 Tj
--8527.14 TJm
-(3880 3892 3914 3942) 83.0018 Tj
-17.4613 -151.8938 Td
-(2939 2958 2974 3306) 83.0018 Tj
--8527.14 TJm
-(3960 3969 4429 4433) 83.0018 Tj
-17.4613 -161.3871 Td
-(3667 4361 4555 4570) 83.0018 Tj
--8527.14 TJm
-(4445 4460 4466 5222) 83.0018 Tj
-17.4613 -170.8805 Td
-(4587 4588 4646 4943) 83.0018 Tj
--8527.14 TJm
-(5225 5238 5247 5258) 83.0018 Tj
-17.4613 -180.3739 Td
-(4944 4963 4969 4989) 83.0018 Tj
--8527.14 TJm
-(5269 6398 6547 6562) 83.0018 Tj
-17.4613 -189.8672 Td
-(5003 5104 5107 5108) 83.0018 Tj
--8527.14 TJm
-(6582 6609) 39.3166 Tj
-17.4613 -199.3606 Td
-(5109 5110 5111 5154) 83.0018 Tj
--6520.6 TJm
-(ROOTDEV 0159) 52.4222 Tj
-17.4613 -208.8539 Td
-(5237 5257 5510 5606) 83.0018 Tj
--8527.14 TJm
-(0159 4359) 39.3166 Tj
-17.4613 -218.3473 Td
-(5617 5618 5619 5622) 83.0018 Tj
--6520.6 TJm
-(ROOTINO 3157) 52.4222 Tj
-17.4613 -227.8407 Td
-(6312 6561) 39.3166 Tj
--13543.8 TJm
-(3157 4359) 39.3166 Tj
-0 -237.334 Td
-(procdump 1654) 56.7907 Tj
--11537.1 TJm
-(run 2262) 34.9481 Tj
-17.4613 -246.8274 Td
-(0307 1654 6520) 61.1592 Tj
--11035.5 TJm
-(1661 2262 2263 2269) 83.0018 Tj
-0 -256.3207 Td
-(proghdr 0874) 52.4222 Tj
--14045.3 TJm
-(2307 2316 2317 2319) 83.0018 Tj
-17.4613 -265.8141 Td
-(0874 1119 1133 5016) 83.0018 Tj
--8527.14 TJm
-(2357) 17.4741 Tj
-0 -275.3075 Td
-(pushcli 1455) 52.4222 Tj
--12038.8 TJm
-(runcmd 6906) 48.0537 Tj
-17.4613 -284.8008 Td
-(0326 1375 1455 1723) 83.0018 Tj
--8527.14 TJm
-(6906 6920 6937 6943) 83.0018 Tj
-0 -294.2942 Td
-(readeflags 0485) 65.5277 Tj
--12540.3 TJm
-(6945 6959 6966 6977) 83.0018 Tj
-17.4613 -303.7875 Td
-(0485 1459 1468 1963) 83.0018 Tj
--8527.14 TJm
-(7025) 17.4741 Tj
-17.4613 -313.2809 Td
-(5758) 17.4741 Tj
--14045.6 TJm
-(RUNNING 1526) 52.4222 Tj
-0 -322.7743 Td
-(readi 4102) 43.6851 Tj
--15048.7 TJm
-(1526 1661 1927 1961) 83.0018 Tj
-17.4613 -332.2672 Td
-(0247 4102 4266 4512) 83.0018 Tj
--8527.14 TJm
-(2671) 17.4741 Tj
-17.4613 -341.7606 Td
-(4708 4709 5026 5034) 83.0018 Tj
--6520.6 TJm
-(safestrcpy 5375) 65.5277 Tj
-17.4613 -351.2539 Td
-(5065 5073) 39.3166 Tj
--13543.8 TJm
-(0333 1825 5104 5375) 83.0018 Tj
-0 -360.7473 Td
-(readsb 3678) 48.0537 Tj
--12540.5 TJm
-(sched 1953) 43.6851 Tj
-17.4613 -370.2407 Td
-(3678 3711 3738 3809) 83.0018 Tj
--8527.14 TJm
-(1953 1958 1960 1962) 83.0018 Tj
-0 -379.734 Td
-(readsect 1160) 56.7907 Tj
--13543.7 TJm
-(1964 1977 2025 2139) 83.0018 Tj
-17.4613 -389.2274 Td
-(1160 1195) 39.3166 Tj
--11537.3 TJm
-(scheduler 1908) 61.1592 Tj
-0 -398.7207 Td
-(readseg 1179) 52.4222 Tj
--14045.3 TJm
-(0308 1263 1559 1908) 83.0018 Tj
-17.4613 -408.2141 Td
-(1113 1126 1137 1179) 83.0018 Tj
--8527.14 TJm
-(1928 1967) 39.3166 Tj
-0 -417.7075 Td
-(REDIR 6858) 43.6851 Tj
--13042.1 TJm
-(SCROLLLOCK 6114) 65.5277 Tj
-17.4613 -427.2008 Td
-(6858 6930 7070 7371) 83.0018 Tj
--8527.14 TJm
-(6114 6147) 39.3166 Tj
-0 -436.6942 Td
-(redircmd 6875 7064) 78.6333 Tj
--9028.81 TJm
-(SECTSIZE 1111) 56.7907 Tj
-17.4613 -446.1875 Td
-(6875 6913 6931 7064) 83.0018 Tj
--8527.14 TJm
-(1111 1173 1186 1189) 83.0018 Tj
-17.4613 -455.6809 Td
-(7066 7275 7278 7281) 83.0018 Tj
--8527.14 TJm
-(1194) 17.4741 Tj
-17.4613 -465.1743 Td
-(7359 7372) 39.3166 Tj
--11537.3 TJm
-(SEG 0701) 34.9481 Tj
-0 -474.6672 Td
-(REG_ID 5860) 48.0537 Tj
--14547 TJm
-(0701 1708 1709 1710) 83.0018 Tj
-17.4613 -484.1606 Td
-(5860 5910) 39.3166 Tj
--13543.8 TJm
-(1724 1725) 39.3166 Tj
-0 -493.654 Td
-(REG_TABLE 5862) 61.1592 Tj
--11035.5 TJm
-(SEG16 0706) 43.6851 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  cross-references  Page 10) 192.2146 Tj
-17.4613 -28.4801 Td
-(0706 1726) 39.3166 Tj
--13543.8 TJm
-(3665 4085 4476 4553) 83.0018 Tj
-0 -37.9735 Td
-(segdesc 0677) 52.4222 Tj
--14045.3 TJm
-(4654 6803) 39.3166 Tj
-17.4613 -47.4664 Td
-(0450 0453 0677 0701) 83.0018 Tj
--6520.6 TJm
-(stati 4085) 43.6851 Tj
-17.4613 -56.9598 Td
-(0706 1561) 39.3166 Tj
--13543.8 TJm
-(0248 4085 4480) 61.1592 Tj
-0 -66.4531 Td
-(SEG_ASM 0608) 52.4222 Tj
--12038.8 TJm
-(STA_R 0617 0718) 65.5277 Tj
-17.4613 -75.9465 Td
-(0608 0992 0993 1092) 83.0018 Tj
--8527.14 TJm
-(0617 0718 0992 1092) 83.0018 Tj
-17.4613 -85.4399 Td
-(1093) 17.4741 Tj
--16052.1 TJm
-(1708 1724) 39.3166 Tj
-0 -94.9332 Td
-(SEG_KCODE 0907 1021 1502 2500) 126.6869 Tj
--3510.47 TJm
-(STA_W 0616 0717) 65.5277 Tj
-17.4613 -104.4266 Td
-(0961 1061 1502 1708) 83.0018 Tj
--8527.14 TJm
-(0616 0717 0993 1093) 83.0018 Tj
-17.4613 -113.9199 Td
-(2571 2572) 39.3166 Tj
--13543.8 TJm
-(1709 1710 1725) 61.1592 Tj
-0 -123.4133 Td
-(SEG_KCPU 1504 2502) 78.6333 Tj
--9028.81 TJm
-(STA_X 0613 0714) 65.5277 Tj
-17.4613 -132.9067 Td
-(1504 1710 1712 2518) 83.0018 Tj
--8527.14 TJm
-(0613 0714 0992 1092) 83.0018 Tj
-0 -142.4 Td
-(SEG_KDATA 0908 1022 1503 2501) 126.6869 Tj
--5517.01 TJm
-(1708 1724) 39.3166 Tj
-17.4613 -151.8934 Td
-(0966 1066 1503 1709) 83.0018 Tj
--6520.6 TJm
-(sti 0526) 34.9481 Tj
-17.4613 -161.3867 Td
-(1728 2515) 39.3166 Tj
--13543.8 TJm
-(0526 0528 1473 1914) 83.0018 Tj
-0 -170.8801 Td
-(SEG_NULLASM 0604) 69.8962 Tj
--10032.1 TJm
-(stosb 0442) 43.6851 Tj
-17.4613 -180.3735 Td
-(0604 0991 1091) 61.1592 Tj
--11035.5 TJm
-(0442 0444 1139 5306) 83.0018 Tj
-0 -189.8664 Td
-(SEG_TSS 1507) 52.4222 Tj
--12038.8 TJm
-(strlen 5389) 48.0537 Tj
-17.4613 -199.3598 Td
-(1507 1726 1727 1730) 83.0018 Tj
--8527.14 TJm
-(0334 5046 5086 5389) 83.0018 Tj
-0 -208.8532 Td
-(SEG_UCODE 1505) 61.1592 Tj
--13042 TJm
-(7019 7223) 39.3166 Tj
-17.4613 -218.3465 Td
-(1505 1724 1817) 61.1592 Tj
--9028.94 TJm
-(strncmp 5351) 52.4222 Tj
-0 -227.8399 Td
-(SEG_UDATA 1506) 61.1592 Tj
--13042 TJm
-(0335 4205 5351) 61.1592 Tj
-17.4613 -237.3332 Td
-(1506 1725 1818) 61.1592 Tj
--9028.94 TJm
-(strncpy 5361) 52.4222 Tj
-0 -246.8266 Td
-(SETGATE 0821) 52.4222 Tj
--14045.3 TJm
-(0336 4272 5361) 61.1592 Tj
-17.4613 -256.32 Td
-(0821 2571 2572) 61.1592 Tj
--9028.94 TJm
-(STS_IG32 0732) 56.7907 Tj
-0 -265.8133 Td
-(SHIFT 6108) 43.6851 Tj
--15048.7 TJm
-(0732 0827) 39.3166 Tj
-17.4613 -275.3067 Td
-(6108 6136 6137 6285) 83.0018 Tj
--6520.6 TJm
-(STS_T32A 0729) 56.7907 Tj
-0 -284.8 Td
-(skipelem 4315) 56.7907 Tj
--13543.7 TJm
-(0729 1726) 39.3166 Tj
-17.4613 -294.2934 Td
-(4315 4363) 39.3166 Tj
--11537.3 TJm
-(STS_TG32 0733) 56.7907 Tj
-0 -303.7868 Td
-(sleep 2003) 43.6851 Tj
--15048.7 TJm
-(0733 0827) 39.3166 Tj
-17.4613 -313.2801 Td
-(0311 1659 2003 2006) 83.0018 Tj
--6520.6 TJm
-(sum 5525) 34.9481 Tj
-17.4613 -322.7735 Td
-(2009 2188 2978 3480) 83.0018 Tj
--8527.14 TJm
-(5525 5527 5529 5531) 83.0018 Tj
-17.4613 -332.2668 Td
-(3581 3912 5242 5261) 83.0018 Tj
--8527.14 TJm
-(5532 5543 5592) 61.1592 Tj
-17.4613 -341.7602 Td
-(6566 6779) 39.3166 Tj
--11537.3 TJm
-(superblock 3161) 65.5277 Tj
-0 -351.2536 Td
-(spinlock 1301) 56.7907 Tj
--13543.7 TJm
-(3161 3678 3708 3733) 83.0018 Tj
-17.4613 -360.7469 Td
-(0206 0311 0321 0323) 83.0018 Tj
--8527.14 TJm
-(3807) 17.4741 Tj
-17.4613 -370.2403 Td
-(0324 0325 0354 1301) 83.0018 Tj
--6520.6 TJm
-(SVR 5664) 34.9481 Tj
-17.4613 -379.7336 Td
-(1358 1361 1373 1402) 83.0018 Tj
--8527.14 TJm
-(5664 5707) 39.3166 Tj
-17.4613 -389.227 Td
-(1444 1606 1609 2003) 83.0018 Tj
--6520.6 TJm
-(swtch 2208) 43.6851 Tj
-17.4613 -398.7204 Td
-(2260 2268 2557 2562) 83.0018 Tj
--8527.14 TJm
-(0318 1928 1967 2207) 83.0018 Tj
-17.4613 -408.2137 Td
-(3309 3324 3526 3530) 83.0018 Tj
--8527.14 TJm
-(2208) 17.4741 Tj
-17.4613 -417.7071 Td
-(3668 3784 4405 4409) 83.0018 Tj
--6520.6 TJm
-(SYSCALL 6753 6760 6761 6762 6763 67) 152.898 Tj
-17.4613 -427.2004 Td
-(5157 5162 6308 6320) 83.0018 Tj
--8527.14 TJm
-(6760 6761 6762 6763) 83.0018 Tj
-17.4613 -436.6938 Td
-(6502) 17.4741 Tj
--16052.1 TJm
-(6764 6765 6766 6767) 83.0018 Tj
-0 -446.1872 Td
-(start 0914 1028 6707) 87.3703 Tj
--10032 TJm
-(6768 6769 6770 6771) 83.0018 Tj
-17.4613 -455.6805 Td
-(0913 0914 0975 1027) 83.0018 Tj
--8527.14 TJm
-(6772 6773 6774 6775) 83.0018 Tj
-17.4613 -465.1739 Td
-(1028 1075 1076 6706) 83.0018 Tj
--8527.14 TJm
-(6776 6777 6778 6779) 83.0018 Tj
-17.4613 -474.6672 Td
-(6707) 17.4741 Tj
--14045.6 TJm
-(syscall 2874) 52.4222 Tj
-0 -484.1606 Td
-(stat 3104) 39.3166 Tj
--15550.3 TJm
-(0344 2607 2756 2874) 83.0018 Tj
-17.4613 -493.654 Td
-(0207 0230 0248 3104) 83.0018 Tj
--6520.6 TJm
-(SYS_chdir 2716) 61.1592 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
-%%Page: 7 7
-%%BeginPageSetup
-%%PageOrientation: Landscape
-pdfStartPage
-180 rotate
--612 -792 translate
-0 0 612 792 re W
-%%EndPageSetup
-[] 0 d
-1 i
-0 j
-0 J
-10 M
-1 w
-/DeviceGray {} cs
-[0] sc
-/DeviceGray {} CS
-[0] SC
-false op
-false OP
-{} settransfer
-0 0 612 792 re
-W
-q
-q
-[0.1 0 0 0.1 0 0] cm
-q
-180 3960 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 738.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  cross-references  Page 11) 192.2146 Tj
-17.4613 -28.4801 Td
-(2716 2851) 39.3166 Tj
--13543.8 TJm
-(2841 2863 4851) 61.1592 Tj
-0 -37.9735 Td
-(sys_chdir 4930) 61.1592 Tj
--11035.5 TJm
-(SYS_pipe 2704) 56.7907 Tj
-17.4613 -47.4664 Td
-(2829 2851 4930) 61.1592 Tj
--11035.5 TJm
-(2704 2864) 39.3166 Tj
-0 -56.9598 Td
-(SYS_close 2707) 61.1592 Tj
--11035.5 TJm
-(sys_pipe 4976) 56.7907 Tj
-17.4613 -66.4531 Td
-(2707 2852) 39.3166 Tj
--13543.8 TJm
-(2842 2864 4976) 61.1592 Tj
-0 -75.9465 Td
-(sys_close 4639) 61.1592 Tj
--11035.5 TJm
-(SYS_read 2706) 56.7907 Tj
-17.4613 -85.4399 Td
-(2830 2852 4639) 61.1592 Tj
--11035.5 TJm
-(2706 2865) 39.3166 Tj
-0 -94.9332 Td
-(SYS_dup 2717) 52.4222 Tj
--12038.8 TJm
-(sys_read 4615) 56.7907 Tj
-17.4613 -104.4266 Td
-(2717 2853) 39.3166 Tj
--13543.8 TJm
-(2843 2865 4615) 61.1592 Tj
-0 -113.9199 Td
-(sys_dup 4601) 52.4222 Tj
--12038.8 TJm
-(SYS_sbrk 2719) 56.7907 Tj
-17.4613 -123.4133 Td
-(2831 2853 4601) 61.1592 Tj
--11035.5 TJm
-(2719 2866) 39.3166 Tj
-0 -132.9067 Td
-(SYS_exec 2709) 56.7907 Tj
--11537.1 TJm
-(sys_sbrk 2951) 56.7907 Tj
-17.4613 -142.4 Td
-(2709 2854 6711) 61.1592 Tj
--11035.5 TJm
-(2844 2866 2951) 61.1592 Tj
-0 -151.8934 Td
-(sys_exec 4951) 56.7907 Tj
--11537.1 TJm
-(SYS_sleep 2720) 61.1592 Tj
-17.4613 -161.3867 Td
-(2832 2854 4951) 61.1592 Tj
--11035.5 TJm
-(2720 2867) 39.3166 Tj
-0 -170.8801 Td
-(SYS_exit 2702) 56.7907 Tj
--11537.1 TJm
-(sys_sleep 2965) 61.1592 Tj
-17.4613 -180.3735 Td
-(2702 2855 6716) 61.1592 Tj
--11035.5 TJm
-(2845 2867 2965) 61.1592 Tj
-0 -189.8664 Td
-(sys_exit 2914) 56.7907 Tj
--11537.1 TJm
-(SYS_unlink 2712) 65.5277 Tj
-17.4613 -199.3598 Td
-(2833 2855 2914) 61.1592 Tj
--11035.5 TJm
-(2712 2868) 39.3166 Tj
-0 -208.8532 Td
-(SYS_fork 2701) 56.7907 Tj
--11537.1 TJm
-(sys_unlink 4751) 65.5277 Tj
-17.4613 -218.3465 Td
-(2701 2856) 39.3166 Tj
--13543.8 TJm
-(2846 2868 4751) 61.1592 Tj
-0 -227.8399 Td
-(sys_fork 2908) 56.7907 Tj
--11537.1 TJm
-(SYS_wait 2703) 56.7907 Tj
-17.4613 -237.3332 Td
-(2834 2856 2908) 61.1592 Tj
--11035.5 TJm
-(2703 2869) 39.3166 Tj
-0 -246.8266 Td
-(SYS_fstat 2713) 61.1592 Tj
--11035.5 TJm
-(sys_wait 2921) 56.7907 Tj
-17.4613 -256.32 Td
-(2713 2857) 39.3166 Tj
--13543.8 TJm
-(2847 2869 2921) 61.1592 Tj
-0 -265.8133 Td
-(sys_fstat 4651) 61.1592 Tj
--11035.5 TJm
-(SYS_write 2705) 61.1592 Tj
-17.4613 -275.3067 Td
-(2835 2857 4651) 61.1592 Tj
--11035.5 TJm
-(2705 2870) 39.3166 Tj
-0 -284.8 Td
-(SYS_getpid 2718) 65.5277 Tj
--10533.8 TJm
-(sys_write 4627) 61.1592 Tj
-17.4613 -294.2934 Td
-(2718 2858) 39.3166 Tj
--13543.8 TJm
-(2848 2870 4627) 61.1592 Tj
-0 -303.7868 Td
-(sys_getpid 2937) 65.5277 Tj
--10533.8 TJm
-(taskstate 0751) 61.1592 Tj
-17.4613 -313.2801 Td
-(2836 2858 2937) 61.1592 Tj
--11035.5 TJm
-(0751 1560) 39.3166 Tj
-0 -322.7735 Td
-(SYS_kill 2708) 56.7907 Tj
--11537.1 TJm
-(TDCR 5685) 39.3166 Tj
-17.4613 -332.2664 Td
-(2708 2859) 39.3166 Tj
--13543.8 TJm
-(5685 5713) 39.3166 Tj
-0 -341.7598 Td
-(sys_kill 2927) 56.7907 Tj
--11537.1 TJm
-(ticks 2563) 43.6851 Tj
-17.4613 -351.2532 Td
-(2837 2859 2927) 61.1592 Tj
--11035.5 TJm
-(0352 2563 2617 2618) 83.0018 Tj
-0 -360.7465 Td
-(SYS_link 2714) 56.7907 Tj
--13543.7 TJm
-(2972 2973 2978) 61.1592 Tj
-17.4613 -370.2399 Td
-(2714 2860) 39.3166 Tj
--11537.3 TJm
-(tickslock 2562) 61.1592 Tj
-0 -379.7332 Td
-(sys_link 4663) 56.7907 Tj
--13543.7 TJm
-(0354 2562 2574 2616) 83.0018 Tj
-17.4613 -389.2266 Td
-(2838 2860 4663) 61.1592 Tj
--11035.5 TJm
-(2619 2971 2975 2978) 83.0018 Tj
-0 -398.72 Td
-(SYS_mkdir 2715) 61.1592 Tj
--13042 TJm
-(2980) 17.4741 Tj
-17.4613 -408.2133 Td
-(2715 2861) 39.3166 Tj
--11537.3 TJm
-(TICR 5683) 39.3166 Tj
-0 -417.7067 Td
-(sys_mkdir 4901) 61.1592 Tj
--13042 TJm
-(5683 5715) 39.3166 Tj
-17.4613 -427.2 Td
-(2839 2861 4901) 61.1592 Tj
--9028.94 TJm
-(TIMER 5675) 43.6851 Tj
-0 -436.6934 Td
-(SYS_mknod 2711) 61.1592 Tj
--13042 TJm
-(5675 5714) 39.3166 Tj
-17.4613 -446.1868 Td
-(2711 2862) 39.3166 Tj
--11537.3 TJm
-(timerinit 6674) 61.1592 Tj
-0 -455.6801 Td
-(sys_mknod 4913) 61.1592 Tj
--13042 TJm
-(0347 1232 6674) 61.1592 Tj
-17.4613 -465.1735 Td
-(2840 2862 4913) 61.1592 Tj
--9028.94 TJm
-(TIMER_16BIT 6671) 69.8962 Tj
-0 -474.6665 Td
-(SYS_open 2710) 56.7907 Tj
--13543.7 TJm
-(6671 6677) 39.3166 Tj
-17.4613 -484.1598 Td
-(2710 2863) 39.3166 Tj
--11537.3 TJm
-(TIMER_DIV 6666) 61.1592 Tj
-0 -493.6532 Td
-(sys_open 4851) 56.7907 Tj
--13543.7 TJm
-(6666 6678 6679) 61.1592 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  cross-references  Page 12) 192.2146 Tj
-0 -28.4801 Td
-(TIMER_FREQ 6665) 65.5277 Tj
--12540.3 TJm
-(5931 5997 6016) 61.1592 Tj
-17.4613 -37.9735 Td
-(6665 6666) 39.3166 Tj
--11537.3 TJm
-(T_SYSCALL 2426) 61.1592 Tj
-0 -47.4664 Td
-(TIMER_MODE 6668) 65.5277 Tj
--12540.3 TJm
-(2426 2572 2603 6712) 83.0018 Tj
-17.4613 -56.9598 Td
-(6668 6677) 39.3166 Tj
--13543.8 TJm
-(6717 6757) 39.3166 Tj
-0 -66.4531 Td
-(TIMER_RATEGEN 6670) 78.6333 Tj
--9028.81 TJm
-(usegment 1721) 56.7907 Tj
-17.4613 -75.9465 Td
-(6670 6677) 39.3166 Tj
--13543.8 TJm
-(0310 1721 1846 1926) 83.0018 Tj
-0 -85.4399 Td
-(TIMER_SEL0 6669) 65.5277 Tj
--12540.3 TJm
-(5112) 17.4741 Tj
-17.4613 -94.9332 Td
-(6669 6677) 39.3166 Tj
--11537.3 TJm
-(userinit 1802) 56.7907 Tj
-0 -104.4266 Td
-(TPR 5662) 34.9481 Tj
--16052 TJm
-(0312 1233 1802) 61.1592 Tj
-17.4613 -113.9199 Td
-(5662 5743) 39.3166 Tj
--11537.3 TJm
-(VER 5661) 34.9481 Tj
-0 -123.4133 Td
-(trap 2601) 39.3166 Tj
--15550.3 TJm
-(5661 5723) 39.3166 Tj
-17.4613 -132.9067 Td
-(2452 2454 2524 2601) 83.0018 Tj
--6520.6 TJm
-(wait 2153) 39.3166 Tj
-17.4613 -142.4 Td
-(2653 2655 2658) 61.1592 Tj
--11035.5 TJm
-(0313 2153 2923 6762) 83.0018 Tj
-0 -151.8934 Td
-(trapframe 0552) 61.1592 Tj
--13042 TJm
-(6833 6944 6970 6971) 83.0018 Tj
-17.4613 -161.3867 Td
-(0552 1536 1780 2601) 83.0018 Tj
--8527.14 TJm
-(7026) 17.4741 Tj
-0 -170.8801 Td
-(trapret 2529) 52.4222 Tj
--12038.8 TJm
-(waitdisk 1151) 56.7907 Tj
-17.4613 -180.3735 Td
-(1617 1785 2528 2529) 83.0018 Tj
--8527.14 TJm
-(1151 1163 1172) 61.1592 Tj
-0 -189.8664 Td
-(tvinit 2566) 48.0537 Tj
--12540.5 TJm
-(wakeup 2064) 48.0537 Tj
-17.4613 -199.3598 Td
-(0353 1226 2566) 61.1592 Tj
--11035.5 TJm
-(0314 2064 2618 3422) 83.0018 Tj
-0 -208.8532 Td
-(T_DEV 3102) 43.6851 Tj
--15048.7 TJm
-(3639 3941 3966 5216) 83.0018 Tj
-17.4613 -218.3465 Td
-(3102 4107 4157 4923) 83.0018 Tj
--8527.14 TJm
-(5219 5241 5246 5268) 83.0018 Tj
-0 -227.8399 Td
-(T_DIR 3100) 43.6851 Tj
--15048.7 TJm
-(6541) 17.4741 Tj
-17.4613 -237.3332 Td
-(3100 4218 4365 4673) 83.0018 Tj
--6520.6 TJm
-(wakeup1 2053) 52.4222 Tj
-17.4613 -246.8266 Td
-(4778 4787 4829 4868) 83.0018 Tj
--8527.14 TJm
-(2053 2067 2126 2133) 83.0018 Tj
-17.4613 -256.32 Td
-(4906 4938) 39.3166 Tj
--11537.3 TJm
-(writei 4152) 48.0537 Tj
-0 -265.8133 Td
-(T_FILE 3101) 48.0537 Tj
--14547 TJm
-(0249 4152 4274 4532) 83.0018 Tj
-17.4613 -275.3067 Td
-(3101 4814 4862) 61.1592 Tj
--11035.5 TJm
-(4785 4786) 39.3166 Tj
-0 -284.8 Td
-(T_IRQ0 2429) 48.0537 Tj
--12540.5 TJm
-(xchg 0501) 39.3166 Tj
-17.4613 -294.2934 Td
-(2429 2614 2623 2627) 83.0018 Tj
--8527.14 TJm
-(0501 1260 1382 1419) 83.0018 Tj
-17.4613 -303.7868 Td
-(2631 2635 2636 2671) 83.0018 Tj
--6520.6 TJm
-(yield 1973) 43.6851 Tj
-17.4613 -313.2801 Td
-(5707 5714 5727 5917) 83.0018 Tj
--8527.14 TJm
-(0315 1973 2672) 61.1592 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
-%%Page: 8 8
-%%BeginPageSetup
-%%PageOrientation: Landscape
-pdfStartPage
-180 rotate
--612 -792 translate
-0 0 612 792 re W
-%%EndPageSetup
-[] 0 d
-1 i
-0 j
-0 J
-10 M
-1 w
-/DeviceGray {} cs
-[0] sc
-/DeviceGray {} CS
-[0] SC
-false op
-false OP
-{} settransfer
-0 0 612 792 re
-W
-q
-q
-[0.1 0 0 0.1 0 0] cm
-q
-180 3960 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 738.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/types.h  Page 1) 166.0035 Tj
-0 -28.4801 Td
-(0100 typedef unsigned int   uint;) 144.161 Tj
-0 -37.9735 Td
-(0101 typedef unsigned short ushort;) 152.898 Tj
-0 -47.4668 Td
-(0102 typedef unsigned char  uchar;) 148.5295 Tj
-0 -56.9602 Td
-(0103 ) 21.8426 Tj
-0 -66.4535 Td
-(0104 ) 21.8426 Tj
-0 -75.9469 Td
-(0105 ) 21.8426 Tj
-0 -85.4403 Td
-(0106 ) 21.8426 Tj
-0 -94.9336 Td
-(0107 ) 21.8426 Tj
-0 -104.427 Td
-(0108 ) 21.8426 Tj
-0 -113.9203 Td
-(0109 ) 21.8426 Tj
-0 -123.4137 Td
-(0110 ) 21.8426 Tj
-0 -132.9071 Td
-(0111 ) 21.8426 Tj
-0 -142.4004 Td
-(0112 ) 21.8426 Tj
-0 -151.8938 Td
-(0113 ) 21.8426 Tj
-0 -161.3871 Td
-(0114 ) 21.8426 Tj
-0 -170.8805 Td
-(0115 ) 21.8426 Tj
-0 -180.3739 Td
-(0116 ) 21.8426 Tj
-0 -189.8672 Td
-(0117 ) 21.8426 Tj
-0 -199.3606 Td
-(0118 ) 21.8426 Tj
-0 -208.8539 Td
-(0119 ) 21.8426 Tj
-0 -218.3473 Td
-(0120 ) 21.8426 Tj
-0 -227.8407 Td
-(0121 ) 21.8426 Tj
-0 -237.334 Td
-(0122 ) 21.8426 Tj
-0 -246.8274 Td
-(0123 ) 21.8426 Tj
-0 -256.3207 Td
-(0124 ) 21.8426 Tj
-0 -265.8141 Td
-(0125 ) 21.8426 Tj
-0 -275.3075 Td
-(0126 ) 21.8426 Tj
-0 -284.8008 Td
-(0127 ) 21.8426 Tj
-0 -294.2942 Td
-(0128 ) 21.8426 Tj
-0 -303.7875 Td
-(0129 ) 21.8426 Tj
-0 -313.2809 Td
-(0130 ) 21.8426 Tj
-0 -322.7743 Td
-(0131 ) 21.8426 Tj
-0 -332.2676 Td
-(0132 ) 21.8426 Tj
-0 -341.761 Td
-(0133 ) 21.8426 Tj
-0 -351.2543 Td
-(0134 ) 21.8426 Tj
-0 -360.7477 Td
-(0135 ) 21.8426 Tj
-0 -370.2411 Td
-(0136 ) 21.8426 Tj
-0 -379.7344 Td
-(0137 ) 21.8426 Tj
-0 -389.2278 Td
-(0138 ) 21.8426 Tj
-0 -398.7211 Td
-(0139 ) 21.8426 Tj
-0 -408.2145 Td
-(0140 ) 21.8426 Tj
-0 -417.7079 Td
-(0141 ) 21.8426 Tj
-0 -427.2012 Td
-(0142 ) 21.8426 Tj
-0 -436.6946 Td
-(0143 ) 21.8426 Tj
-0 -446.1879 Td
-(0144 ) 21.8426 Tj
-0 -455.6813 Td
-(0145 ) 21.8426 Tj
-0 -465.1747 Td
-(0146 ) 21.8426 Tj
-0 -474.668 Td
-(0147 ) 21.8426 Tj
-0 -484.1614 Td
-(0148 ) 21.8426 Tj
-0 -493.6547 Td
-(0149 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 01) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/param.h  Page 1) 166.0035 Tj
-0 -28.4801 Td
-(0150 #define NPROC        64  // maximum number of processes) 262.1109 Tj
-0 -37.9735 Td
-(0151 #define PAGE       4096  // granularity of user-space memo\
-ry allocation) 332.0071 Tj
-0 -47.4668 Td
-(0152 #define KSTACKSIZE PAGE  // size of per-process kernel sta\
-ck) 283.9534 Tj
-0 -56.9602 Td
-(0153 #define NCPU          8  // maximum number of CPUs) 240.2683 Tj
-0 -66.4535 Td
-(0154 #define NOFILE       16  // open files per process) 240.2683 Tj
-0 -75.9469 Td
-(0155 #define NFILE       100  // open files per system) 235.8998 Tj
-0 -85.4403 Td
-(0156 #define NBUF         10  // size of disk block cache) 249.0053 Tj
-0 -94.9336 Td
-(0157 #define NINODE       50  // maximum number of active i-nod\
-es) 283.9534 Tj
-0 -104.427 Td
-(0158 #define NDEV         10  // maximum major device number) 262.1109 Tj
-0 -113.9203 Td
-(0159 #define ROOTDEV       1  // device number of file system r\
-oot disk) 310.1645 Tj
-0 -123.4137 Td
-(0160 ) 21.8426 Tj
-0 -132.9071 Td
-(0161 ) 21.8426 Tj
-0 -142.4004 Td
-(0162 ) 21.8426 Tj
-0 -151.8938 Td
-(0163 ) 21.8426 Tj
-0 -161.3871 Td
-(0164 ) 21.8426 Tj
-0 -170.8805 Td
-(0165 ) 21.8426 Tj
-0 -180.3739 Td
-(0166 ) 21.8426 Tj
-0 -189.8672 Td
-(0167 ) 21.8426 Tj
-0 -199.3606 Td
-(0168 ) 21.8426 Tj
-0 -208.8539 Td
-(0169 ) 21.8426 Tj
-0 -218.3473 Td
-(0170 ) 21.8426 Tj
-0 -227.8407 Td
-(0171 ) 21.8426 Tj
-0 -237.334 Td
-(0172 ) 21.8426 Tj
-0 -246.8274 Td
-(0173 ) 21.8426 Tj
-0 -256.3207 Td
-(0174 ) 21.8426 Tj
-0 -265.8141 Td
-(0175 ) 21.8426 Tj
-0 -275.3075 Td
-(0176 ) 21.8426 Tj
-0 -284.8008 Td
-(0177 ) 21.8426 Tj
-0 -294.2942 Td
-(0178 ) 21.8426 Tj
-0 -303.7875 Td
-(0179 ) 21.8426 Tj
-0 -313.2809 Td
-(0180 ) 21.8426 Tj
-0 -322.7743 Td
-(0181 ) 21.8426 Tj
-0 -332.2676 Td
-(0182 ) 21.8426 Tj
-0 -341.761 Td
-(0183 ) 21.8426 Tj
-0 -351.2543 Td
-(0184 ) 21.8426 Tj
-0 -360.7477 Td
-(0185 ) 21.8426 Tj
-0 -370.2411 Td
-(0186 ) 21.8426 Tj
-0 -379.7344 Td
-(0187 ) 21.8426 Tj
-0 -389.2278 Td
-(0188 ) 21.8426 Tj
-0 -398.7211 Td
-(0189 ) 21.8426 Tj
-0 -408.2145 Td
-(0190 ) 21.8426 Tj
-0 -417.7079 Td
-(0191 ) 21.8426 Tj
-0 -427.2012 Td
-(0192 ) 21.8426 Tj
-0 -436.6946 Td
-(0193 ) 21.8426 Tj
-0 -446.1879 Td
-(0194 ) 21.8426 Tj
-0 -455.6813 Td
-(0195 ) 21.8426 Tj
-0 -465.1747 Td
-(0196 ) 21.8426 Tj
-0 -474.668 Td
-(0197 ) 21.8426 Tj
-0 -484.1614 Td
-(0198 ) 21.8426 Tj
-0 -493.6547 Td
-(0199 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 01) 34.9481 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
-%%Page: 9 9
-%%BeginPageSetup
-%%PageOrientation: Landscape
-pdfStartPage
-180 rotate
--612 -792 translate
-0 0 612 792 re W
-%%EndPageSetup
-[] 0 d
-1 i
-0 j
-0 J
-10 M
-1 w
-/DeviceGray {} cs
-[0] sc
-/DeviceGray {} CS
-[0] SC
-false op
-false OP
-{} settransfer
-0 0 612 792 re
-W
-q
-q
-[0.1 0 0 0.1 0 0] cm
-q
-180 3960 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 738.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/defs.h  Page 1) 161.635 Tj
-0 -28.4801 Td
-(0200 struct buf;) 69.8962 Tj
-0 -37.9735 Td
-(0201 struct context;) 87.3703 Tj
-0 -47.4668 Td
-(0202 struct file;) 74.2647 Tj
-0 -56.9602 Td
-(0203 struct inode;) 78.6333 Tj
-0 -66.4535 Td
-(0204 struct pipe;) 74.2647 Tj
-0 -75.9469 Td
-(0205 struct proc;) 74.2647 Tj
-0 -85.4403 Td
-(0206 struct spinlock;) 91.7388 Tj
-0 -94.9336 Td
-(0207 struct stat;) 74.2647 Tj
-0 -104.427 Td
-(0208 ) 21.8426 Tj
-0 -113.9203 Td
-(0209 // bio.c) 56.7907 Tj
-0 -123.4137 Td
-(0210 void            binit\(void\);) 144.161 Tj
-0 -132.9071 Td
-(0211 struct buf*     bread\(uint, uint\);) 170.3721 Tj
-0 -142.4004 Td
-(0212 void            brelse\(struct buf*\);) 179.1091 Tj
-0 -151.8938 Td
-(0213 void            bwrite\(struct buf*\);) 179.1091 Tj
-0 -161.3871 Td
-(0214 ) 21.8426 Tj
-0 -170.8805 Td
-(0215 // console.c) 74.2647 Tj
-0 -180.3739 Td
-(0216 void            consoleinit\(void\);) 170.3721 Tj
-0 -189.8672 Td
-(0217 void            cprintf\(char*, ...\);) 179.1091 Tj
-0 -199.3606 Td
-(0218 void            consoleintr\(int\(*\)\(void\)\);) 205.3202 Tj
-0 -208.8539 Td
-(0219 void            panic\(char*\) __attribute__\(\(noreturn\)\
-\);) 262.1109 Tj
-0 -218.3473 Td
-(0220 ) 21.8426 Tj
-0 -227.8407 Td
-(0221 // exec.c) 61.1592 Tj
-0 -237.334 Td
-(0222 int             exec\(char*, char**\);) 179.1091 Tj
-0 -246.8274 Td
-(0223 ) 21.8426 Tj
-0 -256.3207 Td
-(0224 // file.c) 61.1592 Tj
-0 -265.8141 Td
-(0225 struct file*    filealloc\(void\);) 161.635 Tj
-0 -275.3075 Td
-(0226 void            fileclose\(struct file*\);) 196.5831 Tj
-0 -284.8008 Td
-(0227 struct file*    filedup\(struct file*\);) 187.8461 Tj
-0 -294.2942 Td
-(0228 void            fileinit\(void\);) 157.2665 Tj
-0 -303.7875 Td
-(0229 int             fileread\(struct file*, char*, int n\);) 253.3738 Tj
-0 -313.2809 Td
-(0230 int             filestat\(struct file*, struct stat*\);) 253.3738 Tj
-0 -322.7743 Td
-(0231 int             filewrite\(struct file*, char*, int n\);) 257.7424 Tj
-0 -332.2676 Td
-(0232 ) 21.8426 Tj
-0 -341.761 Td
-(0233 // fs.c) 52.4222 Tj
-0 -351.2543 Td
-(0234 int             dirlink\(struct inode*, char*, uint\);) 249.0053 Tj
-0 -360.7477 Td
-(0235 struct inode*   dirlookup\(struct inode*, char*, uint*\);) 262.1109 Tj
-0 -370.2411 Td
-(0236 struct inode*   ialloc\(uint, short\);) 179.1091 Tj
-0 -379.7344 Td
-(0237 struct inode*   idup\(struct inode*\);) 179.1091 Tj
-0 -389.2278 Td
-(0238 void            iinit\(void\);) 144.161 Tj
-0 -398.7211 Td
-(0239 void            ilock\(struct inode*\);) 183.4776 Tj
-0 -408.2145 Td
-(0240 void            iput\(struct inode*\);) 179.1091 Tj
-0 -417.7079 Td
-(0241 void            iunlock\(struct inode*\);) 192.2146 Tj
-0 -427.2012 Td
-(0242 void            iunlockput\(struct inode*\);) 205.3202 Tj
-0 -436.6946 Td
-(0243 void            iupdate\(struct inode*\);) 192.2146 Tj
-0 -446.1879 Td
-(0244 int             namecmp\(const char*, const char*\);) 240.2683 Tj
-0 -455.6813 Td
-(0245 struct inode*   namei\(char*\);) 148.5295 Tj
-0 -465.1747 Td
-(0246 struct inode*   nameiparent\(char*, char*\);) 205.3202 Tj
-0 -474.668 Td
-(0247 int             readi\(struct inode*, char*, uint, uint\);) 266.4794 Tj
-0 -484.1614 Td
-(0248 void            stati\(struct inode*, struct stat*\);) 244.6368 Tj
-0 -493.6547 Td
-(0249 int             writei\(struct inode*, char*, uint, uint\)\
-;) 270.8479 Tj
-0 -522.1348 Td
-(Sheet 02) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/defs.h  Page 2) 161.635 Tj
-0 -28.4801 Td
-(0250 // ide.c) 56.7907 Tj
-0 -37.9735 Td
-(0251 void            ideinit\(void\);) 152.898 Tj
-0 -47.4668 Td
-(0252 void            ideintr\(void\);) 152.898 Tj
-0 -56.9602 Td
-(0253 void            iderw\(struct buf*\);) 174.7406 Tj
-0 -66.4535 Td
-(0254 ) 21.8426 Tj
-0 -75.9469 Td
-(0255 // ioapic.c) 69.8962 Tj
-0 -85.4403 Td
-(0256 void            ioapicenable\(int irq, int cpu\);) 227.1628 Tj
-0 -94.9336 Td
-(0257 extern uchar    ioapicid;) 131.0554 Tj
-0 -104.427 Td
-(0258 void            ioapicinit\(void\);) 166.0035 Tj
-0 -113.9203 Td
-(0259 ) 21.8426 Tj
-0 -123.4137 Td
-(0260 // kalloc.c) 69.8962 Tj
-0 -132.9071 Td
-(0261 char*           kalloc\(int\);) 144.161 Tj
-0 -142.4004 Td
-(0262 void            kfree\(char*, int\);) 170.3721 Tj
-0 -151.8938 Td
-(0263 void            kinit\(void\);) 144.161 Tj
-0 -161.3871 Td
-(0264 ) 21.8426 Tj
-0 -170.8805 Td
-(0265 // kbd.c) 56.7907 Tj
-0 -180.3739 Td
-(0266 void            kbdintr\(void\);) 152.898 Tj
-0 -189.8672 Td
-(0267 ) 21.8426 Tj
-0 -199.3606 Td
-(0268 // lapic.c) 65.5277 Tj
-0 -208.8539 Td
-(0269 int             cpunum\(void\);) 148.5295 Tj
-0 -218.3473 Td
-(0270 extern volatile uint*    lapic;) 157.2665 Tj
-0 -227.8407 Td
-(0271 void            lapiceoi\(void\);) 157.2665 Tj
-0 -237.334 Td
-(0272 void            lapicinit\(int\);) 157.2665 Tj
-0 -246.8274 Td
-(0273 void            lapicstartap\(uchar, uint\);) 205.3202 Tj
-0 -256.3207 Td
-(0274 void            microdelay\(int\);) 161.635 Tj
-0 -265.8141 Td
-(0275 ) 21.8426 Tj
-0 -275.3075 Td
-(0276 // mp.c) 52.4222 Tj
-0 -284.8008 Td
-(0277 extern int      ismp;) 113.5814 Tj
-0 -294.2942 Td
-(0278 int             mpbcpu\(void\);) 148.5295 Tj
-0 -303.7875 Td
-(0279 void            mpinit\(void\);) 148.5295 Tj
-0 -313.2809 Td
-(0280 void            mpstartthem\(void\);) 170.3721 Tj
-0 -322.7743 Td
-(0281 ) 21.8426 Tj
-0 -332.2676 Td
-(0282 // picirq.c) 69.8962 Tj
-0 -341.761 Td
-(0283 void            picenable\(int\);) 157.2665 Tj
-0 -351.2543 Td
-(0284 void            picinit\(void\);) 152.898 Tj
-0 -360.7477 Td
-(0285 ) 21.8426 Tj
-0 -370.2411 Td
-(0286 // pipe.c) 61.1592 Tj
-0 -379.7344 Td
-(0287 int             pipealloc\(struct file**, struct file**\);) 266.4794 Tj
-0 -389.2278 Td
-(0288 void            pipeclose\(struct pipe*, int\);) 218.4257 Tj
-0 -398.7211 Td
-(0289 int             piperead\(struct pipe*, char*, int\);) 244.6368 Tj
-0 -408.2145 Td
-(0290 int             pipewrite\(struct pipe*, char*, int\);) 249.0053 Tj
-0 -417.7079 Td
-(0291 ) 21.8426 Tj
-0 -427.2012 Td
-(0292 ) 21.8426 Tj
-0 -436.6946 Td
-(0293 ) 21.8426 Tj
-0 -446.1879 Td
-(0294 ) 21.8426 Tj
-0 -455.6813 Td
-(0295 ) 21.8426 Tj
-0 -465.1747 Td
-(0296 ) 21.8426 Tj
-0 -474.668 Td
-(0297 ) 21.8426 Tj
-0 -484.1614 Td
-(0298 ) 21.8426 Tj
-0 -493.6547 Td
-(0299 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 02) 34.9481 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
-%%Page: 10 10
-%%BeginPageSetup
-%%PageOrientation: Landscape
-pdfStartPage
-180 rotate
--612 -792 translate
-0 0 612 792 re W
-%%EndPageSetup
-[] 0 d
-1 i
-0 j
-0 J
-10 M
-1 w
-/DeviceGray {} cs
-[0] sc
-/DeviceGray {} CS
-[0] SC
-false op
-false OP
-{} settransfer
-0 0 612 792 re
-W
-q
-q
-[0.1 0 0 0.1 0 0] cm
-q
-180 3960 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 738.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/defs.h  Page 3) 161.635 Tj
-0 -28.4801 Td
-(0300 // proc.c) 61.1592 Tj
-0 -37.9735 Td
-(0301 struct proc*    copyproc\(struct proc*\);) 192.2146 Tj
-0 -47.4668 Td
-(0302 void            exit\(void\);) 139.7925 Tj
-0 -56.9602 Td
-(0303 int             fork\(void\);) 139.7925 Tj
-0 -66.4535 Td
-(0304 int             growproc\(int\);) 152.898 Tj
-0 -75.9469 Td
-(0305 int             kill\(int\);) 135.4239 Tj
-0 -85.4403 Td
-(0306 void            pinit\(void\);) 144.161 Tj
-0 -94.9336 Td
-(0307 void            procdump\(void\);) 157.2665 Tj
-0 -104.427 Td
-(0308 void            scheduler\(void\) __attribute__\(\(noretur\
-n\)\);) 275.2164 Tj
-0 -113.9203 Td
-(0309 void            ksegment\(void\);) 157.2665 Tj
-0 -123.4137 Td
-(0310 void            usegment\(void\);) 157.2665 Tj
-0 -132.9071 Td
-(0311 void            sleep\(void*, struct spinlock*\);) 227.1628 Tj
-0 -142.4004 Td
-(0312 void            userinit\(void\);) 157.2665 Tj
-0 -151.8938 Td
-(0313 int             wait\(void\);) 139.7925 Tj
-0 -161.3871 Td
-(0314 void            wakeup\(void*\);) 152.898 Tj
-0 -170.8805 Td
-(0315 void            yield\(void\);) 144.161 Tj
-0 -180.3739 Td
-(0316 ) 21.8426 Tj
-0 -189.8672 Td
-(0317 // swtch.S) 65.5277 Tj
-0 -199.3606 Td
-(0318 void            swtch\(struct context**, struct context*\)\
-;) 270.8479 Tj
-0 -208.8539 Td
-(0319 ) 21.8426 Tj
-0 -218.3473 Td
-(0320 // spinlock.c) 78.6333 Tj
-0 -227.8407 Td
-(0321 void            acquire\(struct spinlock*\);) 205.3202 Tj
-0 -237.334 Td
-(0322 void            getcallerpcs\(void*, uint*\);) 209.6887 Tj
-0 -246.8274 Td
-(0323 int             holding\(struct spinlock*\);) 205.3202 Tj
-0 -256.3207 Td
-(0324 void            initlock\(struct spinlock*, char*\);) 240.2683 Tj
-0 -265.8141 Td
-(0325 void            release\(struct spinlock*\);) 205.3202 Tj
-0 -275.3075 Td
-(0326 void            pushcli\(\);) 135.4239 Tj
-0 -284.8008 Td
-(0327 void            popcli\(\);) 131.0554 Tj
-0 -294.2942 Td
-(0328 ) 21.8426 Tj
-0 -303.7875 Td
-(0329 // string.c) 69.8962 Tj
-0 -313.2809 Td
-(0330 int             memcmp\(const void*, const void*, uint\);) 262.1109 Tj
-0 -322.7743 Td
-(0331 void*           memmove\(void*, const void*, uint\);) 240.2683 Tj
-0 -332.2676 Td
-(0332 void*           memset\(void*, int, uint\);) 200.9517 Tj
-0 -341.761 Td
-(0333 char*           safestrcpy\(char*, const char*, int\);) 249.0053 Tj
-0 -351.2543 Td
-(0334 int             strlen\(const char*\);) 179.1091 Tj
-0 -360.7477 Td
-(0335 int             strncmp\(const char*, const char*, uint\);) 266.4794 Tj
-0 -370.2411 Td
-(0336 char*           strncpy\(char*, const char*, int\);) 235.8998 Tj
-0 -379.7344 Td
-(0337 ) 21.8426 Tj
-0 -389.2278 Td
-(0338 // syscall.c) 74.2647 Tj
-0 -398.7211 Td
-(0339 int             argint\(int, int*\);) 170.3721 Tj
-0 -408.2145 Td
-(0340 int             argptr\(int, char**, int\);) 200.9517 Tj
-0 -417.7079 Td
-(0341 int             argstr\(int, char**\);) 179.1091 Tj
-0 -427.2012 Td
-(0342 int             fetchint\(struct proc*, uint, int*\);) 244.6368 Tj
-0 -436.6946 Td
-(0343 int             fetchstr\(struct proc*, uint, char**\);) 253.3738 Tj
-0 -446.1879 Td
-(0344 void            syscall\(void\);) 152.898 Tj
-0 -455.6813 Td
-(0345 ) 21.8426 Tj
-0 -465.1747 Td
-(0346 // timer.c) 65.5277 Tj
-0 -474.668 Td
-(0347 void            timerinit\(void\);) 161.635 Tj
-0 -484.1614 Td
-(0348 ) 21.8426 Tj
-0 -493.6547 Td
-(0349 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 03) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/defs.h  Page 4) 161.635 Tj
-0 -28.4801 Td
-(0350 // trap.c) 61.1592 Tj
-0 -37.9735 Td
-(0351 void            idtinit\(void\);) 152.898 Tj
-0 -47.4668 Td
-(0352 extern int      ticks;) 117.9499 Tj
-0 -56.9602 Td
-(0353 void            tvinit\(void\);) 148.5295 Tj
-0 -66.4535 Td
-(0354 extern struct spinlock tickslock;) 166.0035 Tj
-0 -75.9469 Td
-(0355 ) 21.8426 Tj
-0 -85.4403 Td
-(0356 // uart.c) 61.1592 Tj
-0 -94.9336 Td
-(0357 void            uartinit\(void\);) 157.2665 Tj
-0 -104.427 Td
-(0358 void            uartintr\(void\);) 157.2665 Tj
-0 -113.9203 Td
-(0359 void            uartputc\(int\);) 152.898 Tj
-0 -123.4137 Td
-(0360 ) 21.8426 Tj
-0 -132.9071 Td
-(0361 // number of elements in fixed-size array) 200.9517 Tj
-0 -142.4004 Td
-(0362 #define NELEM\(x\) \(sizeof\(x\)/sizeof\(\(x\)[0]\)\)) 209.6887 Tj
-0 -151.8938 Td
-(0363 ) 21.8426 Tj
-0 -161.3871 Td
-(0364 ) 21.8426 Tj
-0 -170.8805 Td
-(0365 ) 21.8426 Tj
-0 -180.3739 Td
-(0366 ) 21.8426 Tj
-0 -189.8672 Td
-(0367 ) 21.8426 Tj
-0 -199.3606 Td
-(0368 ) 21.8426 Tj
-0 -208.8539 Td
-(0369 ) 21.8426 Tj
-0 -218.3473 Td
-(0370 ) 21.8426 Tj
-0 -227.8407 Td
-(0371 ) 21.8426 Tj
-0 -237.334 Td
-(0372 ) 21.8426 Tj
-0 -246.8274 Td
-(0373 ) 21.8426 Tj
-0 -256.3207 Td
-(0374 ) 21.8426 Tj
-0 -265.8141 Td
-(0375 ) 21.8426 Tj
-0 -275.3075 Td
-(0376 ) 21.8426 Tj
-0 -284.8008 Td
-(0377 ) 21.8426 Tj
-0 -294.2942 Td
-(0378 ) 21.8426 Tj
-0 -303.7875 Td
-(0379 ) 21.8426 Tj
-0 -313.2809 Td
-(0380 ) 21.8426 Tj
-0 -322.7743 Td
-(0381 ) 21.8426 Tj
-0 -332.2676 Td
-(0382 ) 21.8426 Tj
-0 -341.761 Td
-(0383 ) 21.8426 Tj
-0 -351.2543 Td
-(0384 ) 21.8426 Tj
-0 -360.7477 Td
-(0385 ) 21.8426 Tj
-0 -370.2411 Td
-(0386 ) 21.8426 Tj
-0 -379.7344 Td
-(0387 ) 21.8426 Tj
-0 -389.2278 Td
-(0388 ) 21.8426 Tj
-0 -398.7211 Td
-(0389 ) 21.8426 Tj
-0 -408.2145 Td
-(0390 ) 21.8426 Tj
-0 -417.7079 Td
-(0391 ) 21.8426 Tj
-0 -427.2012 Td
-(0392 ) 21.8426 Tj
-0 -436.6946 Td
-(0393 ) 21.8426 Tj
-0 -446.1879 Td
-(0394 ) 21.8426 Tj
-0 -455.6813 Td
-(0395 ) 21.8426 Tj
-0 -465.1747 Td
-(0396 ) 21.8426 Tj
-0 -474.668 Td
-(0397 ) 21.8426 Tj
-0 -484.1614 Td
-(0398 ) 21.8426 Tj
-0 -493.6547 Td
-(0399 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 03) 34.9481 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
-%%Page: 11 11
-%%BeginPageSetup
-%%PageOrientation: Landscape
-pdfStartPage
-180 rotate
--612 -792 translate
-0 0 612 792 re W
-%%EndPageSetup
-[] 0 d
-1 i
-0 j
-0 J
-10 M
-1 w
-/DeviceGray {} cs
-[0] sc
-/DeviceGray {} CS
-[0] SC
-false op
-false OP
-{} settransfer
-0 0 612 792 re
-W
-q
-q
-[0.1 0 0 0.1 0 0] cm
-q
-180 3960 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 738.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/x86.h  Page 1) 157.2665 Tj
-0 -28.4801 Td
-(0400 // Routines to let C code use special x86 instructions.) 262.1109 Tj
-0 -37.9735 Td
-(0401 ) 21.8426 Tj
-0 -47.4668 Td
-(0402 static inline uchar) 104.8443 Tj
-0 -56.9602 Td
-(0403 inb\(ushort port\)) 91.7388 Tj
-0 -66.4535 Td
-(0404 {) 26.2111 Tj
-0 -75.9469 Td
-(0405   uchar data;) 78.6333 Tj
-0 -85.4403 Td
-(0406 ) 21.8426 Tj
-0 -94.9336 Td
-(0407   asm volatile\("in %1,%0" : "=a" \(data\) : "d" \(port\)\)\
-;) 257.7424 Tj
-0 -104.427 Td
-(0408   return data;) 83.0018 Tj
-0 -113.9203 Td
-(0409 }) 26.2111 Tj
-0 -123.4137 Td
-(0410 ) 21.8426 Tj
-0 -132.9071 Td
-(0411 static inline void) 100.4758 Tj
-0 -142.4004 Td
-(0412 insl\(int port, void *addr, int cnt\)) 174.7406 Tj
-0 -151.8938 Td
-(0413 {) 26.2111 Tj
-0 -161.3871 Td
-(0414   asm volatile\("cld; rep insl" :) 161.635 Tj
-0 -170.8805 Td
-(0415                "=D" \(addr\), "=c" \(cnt\) :) 196.5831 Tj
-0 -180.3739 Td
-(0416                "d" \(port\), "0" \(addr\), "1" \(cnt\) :) 240.2683 Tj
-0 -189.8672 Td
-(0417                "memory", "cc"\);) 157.2665 Tj
-0 -199.3606 Td
-(0418 }) 26.2111 Tj
-0 -208.8539 Td
-(0419 ) 21.8426 Tj
-0 -218.3473 Td
-(0420 static inline void) 100.4758 Tj
-0 -227.8407 Td
-(0421 outb\(ushort port, uchar data\)) 148.5295 Tj
-0 -237.334 Td
-(0422 {) 26.2111 Tj
-0 -246.8274 Td
-(0423   asm volatile\("out %0,%1" : : "a" \(data\), "d" \(port\)\
-\);) 262.1109 Tj
-0 -256.3207 Td
-(0424 }) 26.2111 Tj
-0 -265.8141 Td
-(0425 ) 21.8426 Tj
-0 -275.3075 Td
-(0426 static inline void) 100.4758 Tj
-0 -284.8008 Td
-(0427 outw\(ushort port, ushort data\)) 152.898 Tj
-0 -294.2942 Td
-(0428 {) 26.2111 Tj
-0 -303.7875 Td
-(0429   asm volatile\("out %0,%1" : : "a" \(data\), "d" \(port\)\
-\);) 262.1109 Tj
-0 -313.2809 Td
-(0430 }) 26.2111 Tj
-0 -322.7743 Td
-(0431 ) 21.8426 Tj
-0 -332.2676 Td
-(0432 static inline void) 100.4758 Tj
-0 -341.761 Td
-(0433 outsl\(int port, const void *addr, int cnt\)) 205.3202 Tj
-0 -351.2543 Td
-(0434 {) 26.2111 Tj
-0 -360.7477 Td
-(0435   asm volatile\("cld; rep outsl" :) 166.0035 Tj
-0 -370.2411 Td
-(0436                "=S" \(addr\), "=c" \(cnt\) :) 196.5831 Tj
-0 -379.7344 Td
-(0437                "d" \(port\), "0" \(addr\), "1" \(cnt\) :) 240.2683 Tj
-0 -389.2278 Td
-(0438                "cc"\);) 113.5814 Tj
-0 -398.7211 Td
-(0439 }) 26.2111 Tj
-0 -408.2145 Td
-(0440 ) 21.8426 Tj
-0 -417.7079 Td
-(0441 static inline void) 100.4758 Tj
-0 -427.2012 Td
-(0442 stosb\(void *addr, int data, int cnt\)) 179.1091 Tj
-0 -436.6946 Td
-(0443 {) 26.2111 Tj
-0 -446.1879 Td
-(0444   asm volatile\("cld; rep stosb" :) 166.0035 Tj
-0 -455.6813 Td
-(0445                "=D" \(addr\), "=c" \(cnt\) :) 196.5831 Tj
-0 -465.1747 Td
-(0446                "0" \(addr\), "1" \(cnt\), "a" \(data\) :) 240.2683 Tj
-0 -474.668 Td
-(0447                "memory", "cc"\);) 157.2665 Tj
-0 -484.1614 Td
-(0448 }) 26.2111 Tj
-0 -493.6547 Td
-(0449 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 04) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/x86.h  Page 2) 157.2665 Tj
-0 -28.4801 Td
-(0450 struct segdesc;) 87.3703 Tj
-0 -37.9735 Td
-(0451 ) 21.8426 Tj
-0 -47.4668 Td
-(0452 static inline void) 100.4758 Tj
-0 -56.9602 Td
-(0453 lgdt\(struct segdesc *p, int size\)) 166.0035 Tj
-0 -66.4535 Td
-(0454 {) 26.2111 Tj
-0 -75.9469 Td
-(0455   volatile ushort pd[3];) 126.6869 Tj
-0 -85.4403 Td
-(0456 ) 21.8426 Tj
-0 -94.9336 Td
-(0457   pd[0] = size-1;) 96.1073 Tj
-0 -104.427 Td
-(0458   pd[1] = \(uint\)p;) 100.4758 Tj
-0 -113.9203 Td
-(0459   pd[2] = \(uint\)p >> 16;) 126.6869 Tj
-0 -123.4137 Td
-(0460 ) 21.8426 Tj
-0 -132.9071 Td
-(0461   asm volatile\("lgdt \(%0\)" : : "r" \(pd\)\);) 200.9517 Tj
-0 -142.4004 Td
-(0462 }) 26.2111 Tj
-0 -151.8938 Td
-(0463 ) 21.8426 Tj
-0 -161.3871 Td
-(0464 struct gatedesc;) 91.7388 Tj
-0 -170.8805 Td
-(0465 ) 21.8426 Tj
-0 -180.3739 Td
-(0466 static inline void) 100.4758 Tj
-0 -189.8672 Td
-(0467 lidt\(struct gatedesc *p, int size\)) 170.3721 Tj
-0 -199.3606 Td
-(0468 {) 26.2111 Tj
-0 -208.8539 Td
-(0469   volatile ushort pd[3];) 126.6869 Tj
-0 -218.3473 Td
-(0470 ) 21.8426 Tj
-0 -227.8407 Td
-(0471   pd[0] = size-1;) 96.1073 Tj
-0 -237.334 Td
-(0472   pd[1] = \(uint\)p;) 100.4758 Tj
-0 -246.8274 Td
-(0473   pd[2] = \(uint\)p >> 16;) 126.6869 Tj
-0 -256.3207 Td
-(0474 ) 21.8426 Tj
-0 -265.8141 Td
-(0475   asm volatile\("lidt \(%0\)" : : "r" \(pd\)\);) 200.9517 Tj
-0 -275.3075 Td
-(0476 }) 26.2111 Tj
-0 -284.8008 Td
-(0477 ) 21.8426 Tj
-0 -294.2942 Td
-(0478 static inline void) 100.4758 Tj
-0 -303.7875 Td
-(0479 ltr\(ushort sel\)) 87.3703 Tj
-0 -313.2809 Td
-(0480 {) 26.2111 Tj
-0 -322.7743 Td
-(0481   asm volatile\("ltr %0" : : "r" \(sel\)\);) 192.2146 Tj
-0 -332.2676 Td
-(0482 }) 26.2111 Tj
-0 -341.761 Td
-(0483 ) 21.8426 Tj
-0 -351.2543 Td
-(0484 static inline uint) 100.4758 Tj
-0 -360.7477 Td
-(0485 readeflags\(void\)) 91.7388 Tj
-0 -370.2411 Td
-(0486 {) 26.2111 Tj
-0 -379.7344 Td
-(0487   uint eflags;) 83.0018 Tj
-0 -389.2278 Td
-(0488   asm volatile\("pushfl; popl %0" : "=r" \(eflags\)\);) 240.2683 Tj
-0 -398.7211 Td
-(0489   return eflags;) 91.7388 Tj
-0 -408.2145 Td
-(0490 }) 26.2111 Tj
-0 -417.7079 Td
-(0491 ) 21.8426 Tj
-0 -427.2012 Td
-(0492 ) 21.8426 Tj
-0 -436.6946 Td
-(0493 ) 21.8426 Tj
-0 -446.1879 Td
-(0494 ) 21.8426 Tj
-0 -455.6813 Td
-(0495 ) 21.8426 Tj
-0 -465.1747 Td
-(0496 ) 21.8426 Tj
-0 -474.668 Td
-(0497 ) 21.8426 Tj
-0 -484.1614 Td
-(0498 ) 21.8426 Tj
-0 -493.6547 Td
-(0499 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 04) 34.9481 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
-%%Page: 12 12
-%%BeginPageSetup
-%%PageOrientation: Landscape
-pdfStartPage
-180 rotate
--612 -792 translate
-0 0 612 792 re W
-%%EndPageSetup
-[] 0 d
-1 i
-0 j
-0 J
-10 M
-1 w
-/DeviceGray {} cs
-[0] sc
-/DeviceGray {} CS
-[0] SC
-false op
-false OP
-{} settransfer
-0 0 612 792 re
-W
-q
-q
-[0.1 0 0 0.1 0 0] cm
-q
-180 3960 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 738.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/x86.h  Page 3) 157.2665 Tj
-0 -28.4801 Td
-(0500 static inline uint) 100.4758 Tj
-0 -37.9735 Td
-(0501 xchg\(volatile uint *addr, uint newval\)) 187.8461 Tj
-0 -47.4668 Td
-(0502 {) 26.2111 Tj
-0 -56.9602 Td
-(0503   uint result;) 83.0018 Tj
-0 -66.4535 Td
-(0504 ) 21.8426 Tj
-0 -75.9469 Td
-(0505   // The + in "+m" denotes a read-modify-write operand.) 262.1109 Tj
-0 -85.4403 Td
-(0506   asm volatile\("lock; xchgl %0, %1" :) 183.4776 Tj
-0 -94.9336 Td
-(0507                "+m" \(*addr\), "=a" \(result\) :) 214.0572 Tj
-0 -104.427 Td
-(0508                "1" \(newval\) :) 148.5295 Tj
-0 -113.9203 Td
-(0509                "cc"\);) 113.5814 Tj
-0 -123.4137 Td
-(0510   return result;) 91.7388 Tj
-0 -132.9071 Td
-(0511 }) 26.2111 Tj
-0 -142.4004 Td
-(0512 ) 21.8426 Tj
-0 -151.8938 Td
-(0513 static inline void) 100.4758 Tj
-0 -161.3871 Td
-(0514 loadgs\(ushort v\)) 91.7388 Tj
-0 -170.8805 Td
-(0515 {) 26.2111 Tj
-0 -180.3739 Td
-(0516   asm volatile\("movw %0, %%gs" : : "r" \(v\)\);) 214.0572 Tj
-0 -189.8672 Td
-(0517 }) 26.2111 Tj
-0 -199.3606 Td
-(0518 ) 21.8426 Tj
-0 -208.8539 Td
-(0519 static inline void) 100.4758 Tj
-0 -218.3473 Td
-(0520 cli\(void\)) 61.1592 Tj
-0 -227.8407 Td
-(0521 {) 26.2111 Tj
-0 -237.334 Td
-(0522   asm volatile\("cli"\);) 117.9499 Tj
-0 -246.8274 Td
-(0523 }) 26.2111 Tj
-0 -256.3207 Td
-(0524 ) 21.8426 Tj
-0 -265.8141 Td
-(0525 static inline void) 100.4758 Tj
-0 -275.3075 Td
-(0526 sti\(void\)) 61.1592 Tj
-0 -284.8008 Td
-(0527 {) 26.2111 Tj
-0 -294.2942 Td
-(0528   asm volatile\("sti"\);) 117.9499 Tj
-0 -303.7875 Td
-(0529 }) 26.2111 Tj
-0 -313.2809 Td
-(0530 ) 21.8426 Tj
-0 -322.7743 Td
-(0531 ) 21.8426 Tj
-0 -332.2676 Td
-(0532 ) 21.8426 Tj
-0 -341.761 Td
-(0533 ) 21.8426 Tj
-0 -351.2543 Td
-(0534 ) 21.8426 Tj
-0 -360.7477 Td
-(0535 ) 21.8426 Tj
-0 -370.2411 Td
-(0536 ) 21.8426 Tj
-0 -379.7344 Td
-(0537 ) 21.8426 Tj
-0 -389.2278 Td
-(0538 ) 21.8426 Tj
-0 -398.7211 Td
-(0539 ) 21.8426 Tj
-0 -408.2145 Td
-(0540 ) 21.8426 Tj
-0 -417.7079 Td
-(0541 ) 21.8426 Tj
-0 -427.2012 Td
-(0542 ) 21.8426 Tj
-0 -436.6946 Td
-(0543 ) 21.8426 Tj
-0 -446.1879 Td
-(0544 ) 21.8426 Tj
-0 -455.6813 Td
-(0545 ) 21.8426 Tj
-0 -465.1747 Td
-(0546 ) 21.8426 Tj
-0 -474.668 Td
-(0547 ) 21.8426 Tj
-0 -484.1614 Td
-(0548 ) 21.8426 Tj
-0 -493.6547 Td
-(0549 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 05) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/x86.h  Page 4) 157.2665 Tj
-0 -28.4801 Td
-(0550 // Layout of the trap frame built on the stack by the) 253.3738 Tj
-0 -37.9735 Td
-(0551 // hardware and by trapasm.S, and passed to trap\(\).) 244.6368 Tj
-0 -47.4668 Td
-(0552 struct trapframe {) 100.4758 Tj
-0 -56.9602 Td
-(0553   // registers as pushed by pusha) 166.0035 Tj
-0 -66.4535 Td
-(0554   uint edi;) 69.8962 Tj
-0 -75.9469 Td
-(0555   uint esi;) 69.8962 Tj
-0 -85.4403 Td
-(0556   uint ebp;) 69.8962 Tj
-0 -94.9336 Td
-(0557   uint oesp;      // useless & ignored) 187.8461 Tj
-0 -104.427 Td
-(0558   uint ebx;) 69.8962 Tj
-0 -113.9203 Td
-(0559   uint edx;) 69.8962 Tj
-0 -123.4137 Td
-(0560   uint ecx;) 69.8962 Tj
-0 -132.9071 Td
-(0561   uint eax;) 69.8962 Tj
-0 -142.4004 Td
-(0562 ) 21.8426 Tj
-0 -151.8938 Td
-(0563   // rest of trap frame) 122.3184 Tj
-0 -161.3871 Td
-(0564   ushort gs;) 74.2647 Tj
-0 -170.8805 Td
-(0565   ushort padding1;) 100.4758 Tj
-0 -180.3739 Td
-(0566   ushort fs;) 74.2647 Tj
-0 -189.8672 Td
-(0567   ushort padding2;) 100.4758 Tj
-0 -199.3606 Td
-(0568   ushort es;) 74.2647 Tj
-0 -208.8539 Td
-(0569   ushort padding3;) 100.4758 Tj
-0 -218.3473 Td
-(0570   ushort ds;) 74.2647 Tj
-0 -227.8407 Td
-(0571   ushort padding4;) 100.4758 Tj
-0 -237.334 Td
-(0572   uint trapno;) 83.0018 Tj
-0 -246.8274 Td
-(0573 ) 21.8426 Tj
-0 -256.3207 Td
-(0574   // below here defined by x86 hardware) 192.2146 Tj
-0 -265.8141 Td
-(0575   uint err;) 69.8962 Tj
-0 -275.3075 Td
-(0576   uint eip;) 69.8962 Tj
-0 -284.8008 Td
-(0577   ushort cs;) 74.2647 Tj
-0 -294.2942 Td
-(0578   ushort padding5;) 100.4758 Tj
-0 -303.7875 Td
-(0579   uint eflags;) 83.0018 Tj
-0 -313.2809 Td
-(0580 ) 21.8426 Tj
-0 -322.7743 Td
-(0581   // below here only when crossing rings, such as from use\
-r to kernel) 323.2701 Tj
-0 -332.2676 Td
-(0582   uint esp;) 69.8962 Tj
-0 -341.761 Td
-(0583   ushort ss;) 74.2647 Tj
-0 -351.2543 Td
-(0584   ushort padding6;) 100.4758 Tj
-0 -360.7477 Td
-(0585 };) 30.5796 Tj
-0 -370.2411 Td
-(0586 ) 21.8426 Tj
-0 -379.7344 Td
-(0587 ) 21.8426 Tj
-0 -389.2278 Td
-(0588 ) 21.8426 Tj
-0 -398.7211 Td
-(0589 ) 21.8426 Tj
-0 -408.2145 Td
-(0590 ) 21.8426 Tj
-0 -417.7079 Td
-(0591 ) 21.8426 Tj
-0 -427.2012 Td
-(0592 ) 21.8426 Tj
-0 -436.6946 Td
-(0593 ) 21.8426 Tj
-0 -446.1879 Td
-(0594 ) 21.8426 Tj
-0 -455.6813 Td
-(0595 ) 21.8426 Tj
-0 -465.1747 Td
-(0596 ) 21.8426 Tj
-0 -474.668 Td
-(0597 ) 21.8426 Tj
-0 -484.1614 Td
-(0598 ) 21.8426 Tj
-0 -493.6547 Td
-(0599 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 05) 34.9481 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
-%%Page: 13 13
-%%BeginPageSetup
-%%PageOrientation: Landscape
-pdfStartPage
-180 rotate
--612 -792 translate
-0 0 612 792 re W
-%%EndPageSetup
-[] 0 d
-1 i
-0 j
-0 J
-10 M
-1 w
-/DeviceGray {} cs
-[0] sc
-/DeviceGray {} CS
-[0] SC
-false op
-false OP
-{} settransfer
-0 0 612 792 re
-W
-q
-q
-[0.1 0 0 0.1 0 0] cm
-q
-180 3960 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 738.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/asm.h  Page 1) 157.2665 Tj
-0 -28.4801 Td
-(0600 //) 30.5796 Tj
-0 -37.9735 Td
-(0601 // assembler macros to create x86 segments) 205.3202 Tj
-0 -47.4668 Td
-(0602 //) 30.5796 Tj
-0 -56.9602 Td
-(0603 ) 21.8426 Tj
-0 -66.4535 Td
-(0604 #define SEG_NULLASM                                       \
-      \\) 305.796 Tj
-0 -75.9469 Td
-(0605         .word 0, 0;                                       \
-      \\) 305.796 Tj
-0 -85.4403 Td
-(0606         .byte 0, 0, 0, 0) 126.6869 Tj
-0 -94.9336 Td
-(0607 ) 21.8426 Tj
-0 -104.427 Td
-(0608 #define SEG_ASM\(type,base,lim\)                          \
-        \\) 305.796 Tj
-0 -113.9203 Td
-(0609         .word \(\(\(lim\) >> 12\) & 0xffff\), \(\(base\) &\
- 0xffff\);      \\) 305.796 Tj
-0 -123.4137 Td
-(0610         .byte \(\(\(base\) >> 16\) & 0xff\), \(0x90 | \(ty\
-pe\)\),         \\) 305.796 Tj
-0 -132.9071 Td
-(0611                 \(0xC0 | \(\(\(lim\) >> 28\) & 0xf\)\), \(\
-\(\(base\) >> 24\) & 0xff\)) 332.0071 Tj
-0 -142.4004 Td
-(0612 ) 21.8426 Tj
-0 -151.8938 Td
-(0613 #define STA_X     0x8       // Executable segment) 235.8998 Tj
-0 -161.3871 Td
-(0614 #define STA_E     0x4       // Expand down \(non-executabl\
-e segments\)) 318.9016 Tj
-0 -170.8805 Td
-(0615 #define STA_C     0x4       // Conforming code segment \(e\
-xecutable only\)) 336.3756 Tj
-0 -180.3739 Td
-(0616 #define STA_W     0x2       // Writeable \(non-executable \
-segments\)) 310.1645 Tj
-0 -189.8672 Td
-(0617 #define STA_R     0x2       // Readable \(executable segme\
-nts\)) 288.322 Tj
-0 -199.3606 Td
-(0618 #define STA_A     0x1       // Accessed) 192.2146 Tj
-0 -208.8539 Td
-(0619 ) 21.8426 Tj
-0 -218.3473 Td
-(0620 ) 21.8426 Tj
-0 -227.8407 Td
-(0621 ) 21.8426 Tj
-0 -237.334 Td
-(0622 ) 21.8426 Tj
-0 -246.8274 Td
-(0623 ) 21.8426 Tj
-0 -256.3207 Td
-(0624 ) 21.8426 Tj
-0 -265.8141 Td
-(0625 ) 21.8426 Tj
-0 -275.3075 Td
-(0626 ) 21.8426 Tj
-0 -284.8008 Td
-(0627 ) 21.8426 Tj
-0 -294.2942 Td
-(0628 ) 21.8426 Tj
-0 -303.7875 Td
-(0629 ) 21.8426 Tj
-0 -313.2809 Td
-(0630 ) 21.8426 Tj
-0 -322.7743 Td
-(0631 ) 21.8426 Tj
-0 -332.2676 Td
-(0632 ) 21.8426 Tj
-0 -341.761 Td
-(0633 ) 21.8426 Tj
-0 -351.2543 Td
-(0634 ) 21.8426 Tj
-0 -360.7477 Td
-(0635 ) 21.8426 Tj
-0 -370.2411 Td
-(0636 ) 21.8426 Tj
-0 -379.7344 Td
-(0637 ) 21.8426 Tj
-0 -389.2278 Td
-(0638 ) 21.8426 Tj
-0 -398.7211 Td
-(0639 ) 21.8426 Tj
-0 -408.2145 Td
-(0640 ) 21.8426 Tj
-0 -417.7079 Td
-(0641 ) 21.8426 Tj
-0 -427.2012 Td
-(0642 ) 21.8426 Tj
-0 -436.6946 Td
-(0643 ) 21.8426 Tj
-0 -446.1879 Td
-(0644 ) 21.8426 Tj
-0 -455.6813 Td
-(0645 ) 21.8426 Tj
-0 -465.1747 Td
-(0646 ) 21.8426 Tj
-0 -474.668 Td
-(0647 ) 21.8426 Tj
-0 -484.1614 Td
-(0648 ) 21.8426 Tj
-0 -493.6547 Td
-(0649 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 06) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/mmu.h  Page 1) 157.2665 Tj
-0 -28.4801 Td
-(0650 // This file contains definitions for the) 200.9517 Tj
-0 -37.9735 Td
-(0651 // x86 memory management unit \(MMU\).) 179.1091 Tj
-0 -47.4668 Td
-(0652 ) 21.8426 Tj
-0 -56.9602 Td
-(0653 // Eflags register) 100.4758 Tj
-0 -66.4535 Td
-(0654 #define FL_CF           0x00000001      // Carry Flag) 253.3738 Tj
-0 -75.9469 Td
-(0655 #define FL_PF           0x00000004      // Parity Flag) 257.7424 Tj
-0 -85.4403 Td
-(0656 #define FL_AF           0x00000010      // Auxiliary carry\
- Flag) 297.059 Tj
-0 -94.9336 Td
-(0657 #define FL_ZF           0x00000040      // Zero Flag) 249.0053 Tj
-0 -104.427 Td
-(0658 #define FL_SF           0x00000080      // Sign Flag) 249.0053 Tj
-0 -113.9203 Td
-(0659 #define FL_TF           0x00000100      // Trap Flag) 249.0053 Tj
-0 -123.4137 Td
-(0660 #define FL_IF           0x00000200      // Interrupt Enabl\
-e) 279.5849 Tj
-0 -132.9071 Td
-(0661 #define FL_DF           0x00000400      // Direction Flag) 270.8479 Tj
-0 -142.4004 Td
-(0662 #define FL_OF           0x00000800      // Overflow Flag) 266.4794 Tj
-0 -151.8938 Td
-(0663 #define FL_IOPL_MASK    0x00003000      // I/O Privilege L\
-evel bitmask) 327.6386 Tj
-0 -161.3871 Td
-(0664 #define FL_IOPL_0       0x00000000      //   IOPL == 0) 257.7424 Tj
-0 -170.8805 Td
-(0665 #define FL_IOPL_1       0x00001000      //   IOPL == 1) 257.7424 Tj
-0 -180.3739 Td
-(0666 #define FL_IOPL_2       0x00002000      //   IOPL == 2) 257.7424 Tj
-0 -189.8672 Td
-(0667 #define FL_IOPL_3       0x00003000      //   IOPL == 3) 257.7424 Tj
-0 -199.3606 Td
-(0668 #define FL_NT           0x00004000      // Nested Task) 257.7424 Tj
-0 -208.8539 Td
-(0669 #define FL_RF           0x00010000      // Resume Flag) 257.7424 Tj
-0 -218.3473 Td
-(0670 #define FL_VM           0x00020000      // Virtual 8086 mo\
-de) 283.9534 Tj
-0 -227.8407 Td
-(0671 #define FL_AC           0x00040000      // Alignment Check) 275.2164 Tj
-0 -237.334 Td
-(0672 #define FL_VIF          0x00080000      // Virtual Interru\
-pt Flag) 305.796 Tj
-0 -246.8274 Td
-(0673 #define FL_VIP          0x00100000      // Virtual Interru\
-pt Pending) 318.9016 Tj
-0 -256.3207 Td
-(0674 #define FL_ID           0x00200000      // ID flag) 240.2683 Tj
-0 -265.8141 Td
-(0675 ) 21.8426 Tj
-0 -275.3075 Td
-(0676 // Segment Descriptor) 113.5814 Tj
-0 -284.8008 Td
-(0677 struct segdesc {) 91.7388 Tj
-0 -294.2942 Td
-(0678   uint lim_15_0 : 16;  // Low bits of segment limit) 244.6368 Tj
-0 -303.7875 Td
-(0679   uint base_15_0 : 16; // Low bits of segment base address) 275.2164 Tj
-0 -313.2809 Td
-(0680   uint base_23_16 : 8; // Middle bits of segment base addr\
-ess) 288.322 Tj
-0 -322.7743 Td
-(0681   uint type : 4;       // Segment type \(see STS_ constant\
-s\)) 279.5849 Tj
-0 -332.2676 Td
-(0682   uint s : 1;          // 0 = system, 1 = application) 253.3738 Tj
-0 -341.761 Td
-(0683   uint dpl : 2;        // Descriptor Privilege Level) 249.0053 Tj
-0 -351.2543 Td
-(0684   uint p : 1;          // Present) 166.0035 Tj
-0 -360.7477 Td
-(0685   uint lim_19_16 : 4;  // High bits of segment limit) 249.0053 Tj
-0 -370.2411 Td
-(0686   uint avl : 1;        // Unused \(available for software \
-use\)) 288.322 Tj
-0 -379.7344 Td
-(0687   uint rsv1 : 1;       // Reserved) 170.3721 Tj
-0 -389.2278 Td
-(0688   uint db : 1;         // 0 = 16-bit segment, 1 = 32-bit s\
-egment) 301.4275 Tj
-0 -398.7211 Td
-(0689   uint g : 1;          // Granularity: limit scaled by 4K \
-when set) 310.1645 Tj
-0 -408.2145 Td
-(0690   uint base_31_24 : 8; // High bits of segment base addres\
-s) 279.5849 Tj
-0 -417.7079 Td
-(0691 };) 30.5796 Tj
-0 -427.2012 Td
-(0692 ) 21.8426 Tj
-0 -436.6946 Td
-(0693 ) 21.8426 Tj
-0 -446.1879 Td
-(0694 ) 21.8426 Tj
-0 -455.6813 Td
-(0695 ) 21.8426 Tj
-0 -465.1747 Td
-(0696 ) 21.8426 Tj
-0 -474.668 Td
-(0697 ) 21.8426 Tj
-0 -484.1614 Td
-(0698 ) 21.8426 Tj
-0 -493.6547 Td
-(0699 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 06) 34.9481 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
-%%Page: 14 14
-%%BeginPageSetup
-%%PageOrientation: Landscape
-pdfStartPage
-180 rotate
--612 -792 translate
-0 0 612 792 re W
-%%EndPageSetup
-[] 0 d
-1 i
-0 j
-0 J
-10 M
-1 w
-/DeviceGray {} cs
-[0] sc
-/DeviceGray {} CS
-[0] SC
-false op
-false OP
-{} settransfer
-0 0 612 792 re
-W
-q
-q
-[0.1 0 0 0.1 0 0] cm
-q
-180 3960 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 738.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/mmu.h  Page 2) 157.2665 Tj
-0 -28.4801 Td
-(0700 // Normal segment) 96.1073 Tj
-0 -37.9735 Td
-(0701 #define SEG\(type, base, lim, dpl\) \(struct segdesc\)    \
-\\) 262.1109 Tj
-0 -47.4668 Td
-(0702 { \(\(lim\) >> 12\) & 0xffff, \(uint\)\(base\) & 0xffff,  \
-    \\) 262.1109 Tj
-0 -56.9602 Td
-(0703   \(\(uint\)\(base\) >> 16\) & 0xff, type, 1, dpl, 1,     \
-  \\) 262.1109 Tj
-0 -66.4535 Td
-(0704   \(uint\)\(lim\) >> 28, 0, 0, 1, 1, \(uint\)\(base\) >> 2\
-4 }) 253.3738 Tj
-0 -75.9469 Td
-(0705 ) 21.8426 Tj
-0 -85.4403 Td
-(0706 #define SEG16\(type, base, lim, dpl\) \(struct segdesc\)  \
-\\) 262.1109 Tj
-0 -94.9336 Td
-(0707 { \(lim\) & 0xffff, \(uint\)\(base\) & 0xffff,            \
-  \\) 262.1109 Tj
-0 -104.427 Td
-(0708   \(\(uint\)\(base\) >> 16\) & 0xff, type, 1, dpl, 1,     \
-  \\) 262.1109 Tj
-0 -113.9203 Td
-(0709   \(uint\)\(lim\) >> 16, 0, 0, 1, 0, \(uint\)\(base\) >> 2\
-4 }) 253.3738 Tj
-0 -123.4137 Td
-(0710 ) 21.8426 Tj
-0 -132.9071 Td
-(0711 #define DPL_USER    0x3     // User DPL) 192.2146 Tj
-0 -142.4004 Td
-(0712 ) 21.8426 Tj
-0 -151.8938 Td
-(0713 // Application segment type bits) 161.635 Tj
-0 -161.3871 Td
-(0714 #define STA_X       0x8     // Executable segment) 235.8998 Tj
-0 -170.8805 Td
-(0715 #define STA_E       0x4     // Expand down \(non-executabl\
-e segments\)) 318.9016 Tj
-0 -180.3739 Td
-(0716 #define STA_C       0x4     // Conforming code segment \(e\
-xecutable only\)) 336.3756 Tj
-0 -189.8672 Td
-(0717 #define STA_W       0x2     // Writeable \(non-executable \
-segments\)) 310.1645 Tj
-0 -199.3606 Td
-(0718 #define STA_R       0x2     // Readable \(executable segme\
-nts\)) 288.322 Tj
-0 -208.8539 Td
-(0719 #define STA_A       0x1     // Accessed) 192.2146 Tj
-0 -218.3473 Td
-(0720 ) 21.8426 Tj
-0 -227.8407 Td
-(0721 // System segment type bits) 139.7925 Tj
-0 -237.334 Td
-(0722 #define STS_T16A    0x1     // Available 16-bit TSS) 244.6368 Tj
-0 -246.8274 Td
-(0723 #define STS_LDT     0x2     // Local Descriptor Table) 253.3738 Tj
-0 -256.3207 Td
-(0724 #define STS_T16B    0x3     // Busy 16-bit TSS) 222.7942 Tj
-0 -265.8141 Td
-(0725 #define STS_CG16    0x4     // 16-bit Call Gate) 227.1628 Tj
-0 -275.3075 Td
-(0726 #define STS_TG      0x5     // Task Gate / Coum Transmitio\
-ns) 283.9534 Tj
-0 -284.8008 Td
-(0727 #define STS_IG16    0x6     // 16-bit Interrupt Gate) 249.0053 Tj
-0 -294.2942 Td
-(0728 #define STS_TG16    0x7     // 16-bit Trap Gate) 227.1628 Tj
-0 -303.7875 Td
-(0729 #define STS_T32A    0x9     // Available 32-bit TSS) 244.6368 Tj
-0 -313.2809 Td
-(0730 #define STS_T32B    0xB     // Busy 32-bit TSS) 222.7942 Tj
-0 -322.7743 Td
-(0731 #define STS_CG32    0xC     // 32-bit Call Gate) 227.1628 Tj
-0 -332.2676 Td
-(0732 #define STS_IG32    0xE     // 32-bit Interrupt Gate) 249.0053 Tj
-0 -341.761 Td
-(0733 #define STS_TG32    0xF     // 32-bit Trap Gate) 227.1628 Tj
-0 -351.2543 Td
-(0734 ) 21.8426 Tj
-0 -360.7477 Td
-(0735 ) 21.8426 Tj
-0 -370.2411 Td
-(0736 ) 21.8426 Tj
-0 -379.7344 Td
-(0737 ) 21.8426 Tj
-0 -389.2278 Td
-(0738 ) 21.8426 Tj
-0 -398.7211 Td
-(0739 ) 21.8426 Tj
-0 -408.2145 Td
-(0740 ) 21.8426 Tj
-0 -417.7079 Td
-(0741 ) 21.8426 Tj
-0 -427.2012 Td
-(0742 ) 21.8426 Tj
-0 -436.6946 Td
-(0743 ) 21.8426 Tj
-0 -446.1879 Td
-(0744 ) 21.8426 Tj
-0 -455.6813 Td
-(0745 ) 21.8426 Tj
-0 -465.1747 Td
-(0746 ) 21.8426 Tj
-0 -474.668 Td
-(0747 ) 21.8426 Tj
-0 -484.1614 Td
-(0748 ) 21.8426 Tj
-0 -493.6547 Td
-(0749 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 07) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/mmu.h  Page 3) 157.2665 Tj
-0 -28.4801 Td
-(0750 // Task state segment format) 144.161 Tj
-0 -37.9735 Td
-(0751 struct taskstate {) 100.4758 Tj
-0 -47.4668 Td
-(0752   uint link;         // Old ts selector) 192.2146 Tj
-0 -56.9602 Td
-(0753   uint esp0;         // Stack pointers and segment selecto\
-rs) 283.9534 Tj
-0 -66.4535 Td
-(0754   ushort ss0;        //   after an increase in privilege l\
-evel) 292.6905 Tj
-0 -75.9469 Td
-(0755   ushort padding1;) 100.4758 Tj
-0 -85.4403 Td
-(0756   uint *esp1;) 78.6333 Tj
-0 -94.9336 Td
-(0757   ushort ss1;) 78.6333 Tj
-0 -104.427 Td
-(0758   ushort padding2;) 100.4758 Tj
-0 -113.9203 Td
-(0759   uint *esp2;) 78.6333 Tj
-0 -123.4137 Td
-(0760   ushort ss2;) 78.6333 Tj
-0 -132.9071 Td
-(0761   ushort padding3;) 100.4758 Tj
-0 -142.4004 Td
-(0762   void *cr3;         // Page directory base) 209.6887 Tj
-0 -151.8938 Td
-(0763   uint *eip;         // Saved state from last task switch) 270.8479 Tj
-0 -161.3871 Td
-(0764   uint eflags;) 83.0018 Tj
-0 -170.8805 Td
-(0765   uint eax;          // More saved state \(registers\)) 249.0053 Tj
-0 -180.3739 Td
-(0766   uint ecx;) 69.8962 Tj
-0 -189.8672 Td
-(0767   uint edx;) 69.8962 Tj
-0 -199.3606 Td
-(0768   uint ebx;) 69.8962 Tj
-0 -208.8539 Td
-(0769   uint *esp;) 74.2647 Tj
-0 -218.3473 Td
-(0770   uint *ebp;) 74.2647 Tj
-0 -227.8407 Td
-(0771   uint esi;) 69.8962 Tj
-0 -237.334 Td
-(0772   uint edi;) 69.8962 Tj
-0 -246.8274 Td
-(0773   ushort es;         // Even more saved state \(segment se\
-lectors\)) 305.796 Tj
-0 -256.3207 Td
-(0774   ushort padding4;) 100.4758 Tj
-0 -265.8141 Td
-(0775   ushort cs;) 74.2647 Tj
-0 -275.3075 Td
-(0776   ushort padding5;) 100.4758 Tj
-0 -284.8008 Td
-(0777   ushort ss;) 74.2647 Tj
-0 -294.2942 Td
-(0778   ushort padding6;) 100.4758 Tj
-0 -303.7875 Td
-(0779   ushort ds;) 74.2647 Tj
-0 -313.2809 Td
-(0780   ushort padding7;) 100.4758 Tj
-0 -322.7743 Td
-(0781   ushort fs;) 74.2647 Tj
-0 -332.2676 Td
-(0782   ushort padding8;) 100.4758 Tj
-0 -341.761 Td
-(0783   ushort gs;) 74.2647 Tj
-0 -351.2543 Td
-(0784   ushort padding9;) 100.4758 Tj
-0 -360.7477 Td
-(0785   ushort ldt;) 78.6333 Tj
-0 -370.2411 Td
-(0786   ushort padding10;) 104.8443 Tj
-0 -379.7344 Td
-(0787   ushort t;          // Trap on task switch) 209.6887 Tj
-0 -389.2278 Td
-(0788   ushort iomb;       // I/O map base address) 214.0572 Tj
-0 -398.7211 Td
-(0789 };) 30.5796 Tj
-0 -408.2145 Td
-(0790 ) 21.8426 Tj
-0 -417.7079 Td
-(0791 ) 21.8426 Tj
-0 -427.2012 Td
-(0792 ) 21.8426 Tj
-0 -436.6946 Td
-(0793 ) 21.8426 Tj
-0 -446.1879 Td
-(0794 ) 21.8426 Tj
-0 -455.6813 Td
-(0795 ) 21.8426 Tj
-0 -465.1747 Td
-(0796 ) 21.8426 Tj
-0 -474.668 Td
-(0797 ) 21.8426 Tj
-0 -484.1614 Td
-(0798 ) 21.8426 Tj
-0 -493.6547 Td
-(0799 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 07) 34.9481 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
-%%Page: 15 15
-%%BeginPageSetup
-%%PageOrientation: Landscape
-pdfStartPage
-180 rotate
--612 -792 translate
-0 0 612 792 re W
-%%EndPageSetup
-[] 0 d
-1 i
-0 j
-0 J
-10 M
-1 w
-/DeviceGray {} cs
-[0] sc
-/DeviceGray {} CS
-[0] SC
-false op
-false OP
-{} settransfer
-0 0 612 792 re
-W
-q
-q
-[0.1 0 0 0.1 0 0] cm
-q
-180 3960 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 738.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/mmu.h  Page 4) 157.2665 Tj
-0 -28.4801 Td
-(0800 // Gate descriptors for interrupts and traps) 214.0572 Tj
-0 -37.9735 Td
-(0801 struct gatedesc {) 96.1073 Tj
-0 -47.4668 Td
-(0802   uint off_15_0 : 16;   // low 16 bits of offset in segmen\
-t) 279.5849 Tj
-0 -56.9602 Td
-(0803   uint cs : 16;         // code segment selector) 231.5313 Tj
-0 -66.4535 Td
-(0804   uint args : 5;        // # args, 0 for interrupt/trap ga\
-tes) 288.322 Tj
-0 -75.9469 Td
-(0805   uint rsv1 : 3;        // reserved\(should be zero I gues\
-s\)) 279.5849 Tj
-0 -85.4403 Td
-(0806   uint type : 4;        // type\(STS_{TG,IG32,TG32}\)) 244.6368 Tj
-0 -94.9336 Td
-(0807   uint s : 1;           // must be 0 \(system\)) 218.4257 Tj
-0 -104.427 Td
-(0808   uint dpl : 2;         // descriptor\(meaning new\) privi\
-lege level) 310.1645 Tj
-0 -113.9203 Td
-(0809   uint p : 1;           // Present) 170.3721 Tj
-0 -123.4137 Td
-(0810   uint off_31_16 : 16;  // high bits of offset in segment) 270.8479 Tj
-0 -132.9071 Td
-(0811 };) 30.5796 Tj
-0 -142.4004 Td
-(0812 ) 21.8426 Tj
-0 -151.8938 Td
-(0813 // Set up a normal interrupt/trap gate descriptor.) 240.2683 Tj
-0 -161.3871 Td
-(0814 // - istrap: 1 for a trap \(= exception\) gate, 0 for an i\
-nterrupt gate.) 327.6386 Tj
-0 -170.8805 Td
-(0815 //   interrupt gate clears FL_IF, trap gate leaves FL_IF a\
-lone) 292.6905 Tj
-0 -180.3739 Td
-(0816 // - sel: Code segment selector for interrupt/trap handler) 275.2164 Tj
-0 -189.8672 Td
-(0817 // - off: Offset in code segment for interrupt/trap handle\
-r) 279.5849 Tj
-0 -199.3606 Td
-(0818 // - dpl: Descriptor Privilege Level -) 187.8461 Tj
-0 -208.8539 Td
-(0819 //        the privilege level required for software to inv\
-oke) 288.322 Tj
-0 -218.3473 Td
-(0820 //        this interrupt/trap gate explicitly using an int\
- instruction.) 332.0071 Tj
-0 -227.8407 Td
-(0821 #define SETGATE\(gate, istrap, sel, off, d\)              \
-  \\) 279.5849 Tj
-0 -237.334 Td
-(0822 {                                                         \
-\\) 279.5849 Tj
-0 -246.8274 Td
-(0823   \(gate\).off_15_0 = \(uint\) \(off\) & 0xffff;          \
-      \\) 279.5849 Tj
-0 -256.3207 Td
-(0824   \(gate\).cs = \(sel\);                                  \
-    \\) 279.5849 Tj
-0 -265.8141 Td
-(0825   \(gate\).args = 0;                                      \
-  \\) 279.5849 Tj
-0 -275.3075 Td
-(0826   \(gate\).rsv1 = 0;                                      \
-  \\) 279.5849 Tj
-0 -284.8008 Td
-(0827   \(gate\).type = \(istrap\) ? STS_TG32 : STS_IG32;       \
-    \\) 279.5849 Tj
-0 -294.2942 Td
-(0828   \(gate\).s = 0;                                         \
-  \\) 279.5849 Tj
-0 -303.7875 Td
-(0829   \(gate\).dpl = \(d\);                                   \
-    \\) 279.5849 Tj
-0 -313.2809 Td
-(0830   \(gate\).p = 1;                                         \
-  \\) 279.5849 Tj
-0 -322.7743 Td
-(0831   \(gate\).off_31_16 = \(uint\) \(off\) >> 16;            \
-      \\) 279.5849 Tj
-0 -332.2676 Td
-(0832 }) 26.2111 Tj
-0 -341.761 Td
-(0833 ) 21.8426 Tj
-0 -351.2543 Td
-(0834 ) 21.8426 Tj
-0 -360.7477 Td
-(0835 ) 21.8426 Tj
-0 -370.2411 Td
-(0836 ) 21.8426 Tj
-0 -379.7344 Td
-(0837 ) 21.8426 Tj
-0 -389.2278 Td
-(0838 ) 21.8426 Tj
-0 -398.7211 Td
-(0839 ) 21.8426 Tj
-0 -408.2145 Td
-(0840 ) 21.8426 Tj
-0 -417.7079 Td
-(0841 ) 21.8426 Tj
-0 -427.2012 Td
-(0842 ) 21.8426 Tj
-0 -436.6946 Td
-(0843 ) 21.8426 Tj
-0 -446.1879 Td
-(0844 ) 21.8426 Tj
-0 -455.6813 Td
-(0845 ) 21.8426 Tj
-0 -465.1747 Td
-(0846 ) 21.8426 Tj
-0 -474.668 Td
-(0847 ) 21.8426 Tj
-0 -484.1614 Td
-(0848 ) 21.8426 Tj
-0 -493.6547 Td
-(0849 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 08) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/elf.h  Page 1) 157.2665 Tj
-0 -28.4801 Td
-(0850 // Format of an ELF executable file) 174.7406 Tj
-0 -37.9735 Td
-(0851 ) 21.8426 Tj
-0 -47.4668 Td
-(0852 #define ELF_MAGIC 0x464C457FU  // "\\x7FELF" in little end\
-ian) 283.9534 Tj
-0 -56.9602 Td
-(0853 ) 21.8426 Tj
-0 -66.4535 Td
-(0854 // File header) 83.0018 Tj
-0 -75.9469 Td
-(0855 struct elfhdr {) 87.3703 Tj
-0 -85.4403 Td
-(0856   uint magic;  // must equal ELF_MAGIC) 187.8461 Tj
-0 -94.9336 Td
-(0857   uchar elf[12];) 91.7388 Tj
-0 -104.427 Td
-(0858   ushort type;) 83.0018 Tj
-0 -113.9203 Td
-(0859   ushort machine;) 96.1073 Tj
-0 -123.4137 Td
-(0860   uint version;) 87.3703 Tj
-0 -132.9071 Td
-(0861   uint entry;) 78.6333 Tj
-0 -142.4004 Td
-(0862   uint phoff;) 78.6333 Tj
-0 -151.8938 Td
-(0863   uint shoff;) 78.6333 Tj
-0 -161.3871 Td
-(0864   uint flags;) 78.6333 Tj
-0 -170.8805 Td
-(0865   ushort ehsize;) 91.7388 Tj
-0 -180.3739 Td
-(0866   ushort phentsize;) 104.8443 Tj
-0 -189.8672 Td
-(0867   ushort phnum;) 87.3703 Tj
-0 -199.3606 Td
-(0868   ushort shentsize;) 104.8443 Tj
-0 -208.8539 Td
-(0869   ushort shnum;) 87.3703 Tj
-0 -218.3473 Td
-(0870   ushort shstrndx;) 100.4758 Tj
-0 -227.8407 Td
-(0871 };) 30.5796 Tj
-0 -237.334 Td
-(0872 ) 21.8426 Tj
-0 -246.8274 Td
-(0873 // Program section header) 131.0554 Tj
-0 -256.3207 Td
-(0874 struct proghdr {) 91.7388 Tj
-0 -265.8141 Td
-(0875   uint type;) 74.2647 Tj
-0 -275.3075 Td
-(0876   uint offset;) 83.0018 Tj
-0 -284.8008 Td
-(0877   uint va;) 65.5277 Tj
-0 -294.2942 Td
-(0878   uint pa;) 65.5277 Tj
-0 -303.7875 Td
-(0879   uint filesz;) 83.0018 Tj
-0 -313.2809 Td
-(0880   uint memsz;) 78.6333 Tj
-0 -322.7743 Td
-(0881   uint flags;) 78.6333 Tj
-0 -332.2676 Td
-(0882   uint align;) 78.6333 Tj
-0 -341.761 Td
-(0883 };) 30.5796 Tj
-0 -351.2543 Td
-(0884 ) 21.8426 Tj
-0 -360.7477 Td
-(0885 // Values for Proghdr type) 135.4239 Tj
-0 -370.2411 Td
-(0886 #define ELF_PROG_LOAD           1) 166.0035 Tj
-0 -379.7344 Td
-(0887 ) 21.8426 Tj
-0 -389.2278 Td
-(0888 // Flag bits for Proghdr flags) 152.898 Tj
-0 -398.7211 Td
-(0889 #define ELF_PROG_FLAG_EXEC      1) 166.0035 Tj
-0 -408.2145 Td
-(0890 #define ELF_PROG_FLAG_WRITE     2) 166.0035 Tj
-0 -417.7079 Td
-(0891 #define ELF_PROG_FLAG_READ      4) 166.0035 Tj
-0 -427.2012 Td
-(0892 ) 21.8426 Tj
-0 -436.6946 Td
-(0893 ) 21.8426 Tj
-0 -446.1879 Td
-(0894 ) 21.8426 Tj
-0 -455.6813 Td
-(0895 ) 21.8426 Tj
-0 -465.1747 Td
-(0896 ) 21.8426 Tj
-0 -474.668 Td
-(0897 ) 21.8426 Tj
-0 -484.1614 Td
-(0898 ) 21.8426 Tj
-0 -493.6547 Td
-(0899 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 08) 34.9481 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
-%%Page: 16 16
-%%BeginPageSetup
-%%PageOrientation: Landscape
-pdfStartPage
-180 rotate
--612 -792 translate
-0 0 612 792 re W
-%%EndPageSetup
-[] 0 d
-1 i
-0 j
-0 J
-10 M
-1 w
-/DeviceGray {} cs
-[0] sc
-/DeviceGray {} CS
-[0] SC
-false op
-false OP
-{} settransfer
-0 0 612 792 re
-W
-q
-q
-[0.1 0 0 0.1 0 0] cm
-q
-180 3960 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 738.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/bootasm.S  Page 1) 174.7406 Tj
-0 -28.4801 Td
-(0900 #include "asm.h") 91.7388 Tj
-0 -37.9735 Td
-(0901 ) 21.8426 Tj
-0 -47.4668 Td
-(0902 # Start the first CPU: switch to 32-bit protected mode, ju\
-mp into C.) 318.9016 Tj
-0 -56.9602 Td
-(0903 # The BIOS loads this code from the first sector of the ha\
-rd disk into) 327.6386 Tj
-0 -66.4535 Td
-(0904 # memory at physical address 0x7c00 and starts executing i\
-n real mode) 323.2701 Tj
-0 -75.9469 Td
-(0905 # with %cs=0 %ip=7c00.) 117.9499 Tj
-0 -85.4403 Td
-(0906 ) 21.8426 Tj
-0 -94.9336 Td
-(0907 #define SEG_KCODE 1  // kernel code) 174.7406 Tj
-0 -104.427 Td
-(0908 #define SEG_KDATA 2  // kernel data+stack) 200.9517 Tj
-0 -113.9203 Td
-(0909 ) 21.8426 Tj
-0 -123.4137 Td
-(0910 #define CR0_PE    1  // protected mode enable bit) 235.8998 Tj
-0 -132.9071 Td
-(0911 ) 21.8426 Tj
-0 -142.4004 Td
-(0912 .code16                       # Assemble for 16-bit mode) 266.4794 Tj
-0 -151.8938 Td
-(0913 .globl start) 74.2647 Tj
-0 -161.3871 Td
-(0914 start:) 48.0537 Tj
-0 -170.8805 Td
-(0915   cli                         # Disable interrupts) 240.2683 Tj
-0 -180.3739 Td
-(0916 ) 21.8426 Tj
-0 -189.8672 Td
-(0917   # Set up the important data segment registers \(DS, ES, \
-SS\).) 288.322 Tj
-0 -199.3606 Td
-(0918   xorw    %ax,%ax             # Segment number zero) 244.6368 Tj
-0 -208.8539 Td
-(0919   movw    %ax,%ds             # -> Data Segment) 227.1628 Tj
-0 -218.3473 Td
-(0920   movw    %ax,%es             # -> Extra Segment) 231.5313 Tj
-0 -227.8407 Td
-(0921   movw    %ax,%ss             # -> Stack Segment) 231.5313 Tj
-0 -237.334 Td
-(0922 ) 21.8426 Tj
-0 -246.8274 Td
-(0923   # Enable A20:) 87.3703 Tj
-0 -256.3207 Td
-(0924   #   For backwards compatibility with the earliest PCs, p\
-hysical) 305.796 Tj
-0 -265.8141 Td
-(0925   #   address line 20 is tied low, so that addresses highe\
-r than) 301.4275 Tj
-0 -275.3075 Td
-(0926   #   1MB wrap around to zero by default.  This code undoe\
-s this.) 305.796 Tj
-0 -284.8008 Td
-(0927 seta20.1:) 61.1592 Tj
-0 -294.2942 Td
-(0928   inb     $0x64,%al               # Wait for not busy) 253.3738 Tj
-0 -303.7875 Td
-(0929   testb   $0x2,%al) 100.4758 Tj
-0 -313.2809 Td
-(0930   jnz     seta20.1) 100.4758 Tj
-0 -322.7743 Td
-(0931 ) 21.8426 Tj
-0 -332.2676 Td
-(0932   movb    $0xd1,%al               # 0xd1 -> port 0x64) 253.3738 Tj
-0 -341.761 Td
-(0933   outb    %al,$0x64) 104.8443 Tj
-0 -351.2543 Td
-(0934 ) 21.8426 Tj
-0 -360.7477 Td
-(0935 seta20.2:) 61.1592 Tj
-0 -370.2411 Td
-(0936   inb     $0x64,%al               # Wait for not busy) 253.3738 Tj
-0 -379.7344 Td
-(0937   testb   $0x2,%al) 100.4758 Tj
-0 -389.2278 Td
-(0938   jnz     seta20.2) 100.4758 Tj
-0 -398.7211 Td
-(0939 ) 21.8426 Tj
-0 -408.2145 Td
-(0940   movb    $0xdf,%al               # 0xdf -> port 0x60) 253.3738 Tj
-0 -417.7079 Td
-(0941   outb    %al,$0x60) 104.8443 Tj
-0 -427.2012 Td
-(0942 ) 21.8426 Tj
-0 -436.6946 Td
-(0943 ) 21.8426 Tj
-0 -446.1879 Td
-(0944 ) 21.8426 Tj
-0 -455.6813 Td
-(0945 ) 21.8426 Tj
-0 -465.1747 Td
-(0946 ) 21.8426 Tj
-0 -474.668 Td
-(0947 ) 21.8426 Tj
-0 -484.1614 Td
-(0948 ) 21.8426 Tj
-0 -493.6547 Td
-(0949 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 09) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/bootasm.S  Page 2) 174.7406 Tj
-0 -28.4801 Td
-(0950   # Switch from real to protected mode, using a bootstrap \
-GDT) 288.322 Tj
-0 -37.9735 Td
-(0951   # and segment translation that makes virtual addresses) 266.4794 Tj
-0 -47.4668 Td
-(0952   # identical to physical addresses, so that the) 231.5313 Tj
-0 -56.9602 Td
-(0953   # effective memory map does not change during the switch\
-.) 279.5849 Tj
-0 -66.4535 Td
-(0954   lgdt    gdtdesc) 96.1073 Tj
-0 -75.9469 Td
-(0955   movl    %cr0, %eax) 109.2129 Tj
-0 -85.4403 Td
-(0956   orl     $CR0_PE, %eax) 122.3184 Tj
-0 -94.9336 Td
-(0957   movl    %eax, %cr0) 109.2129 Tj
-0 -104.427 Td
-(0958 ) 21.8426 Tj
-0 -113.9203 Td
-(0959   # Jump to next instruction, but in 32-bit code segment.) 270.8479 Tj
-0 -123.4137 Td
-(0960   # Switches processor into 32-bit mode.) 196.5831 Tj
-0 -132.9071 Td
-(0961   ljmp    $\(SEG_KCODE<<3\), $start32) 174.7406 Tj
-0 -142.4004 Td
-(0962 ) 21.8426 Tj
-0 -151.8938 Td
-(0963 .code32                       # Assemble for 32-bit mode) 266.4794 Tj
-0 -161.3871 Td
-(0964 start32:) 56.7907 Tj
-0 -170.8805 Td
-(0965   # Set up the protected-mode data segment registers) 249.0053 Tj
-0 -180.3739 Td
-(0966   movw    $\(SEG_KDATA<<3\), %ax    # Our data segment sel\
-ector) 288.322 Tj
-0 -189.8672 Td
-(0967   movw    %ax, %ds                # -> DS: Data Segment) 262.1109 Tj
-0 -199.3606 Td
-(0968   movw    %ax, %es                # -> ES: Extra Segment) 266.4794 Tj
-0 -208.8539 Td
-(0969   movw    %ax, %ss                # -> SS: Stack Segment) 266.4794 Tj
-0 -218.3473 Td
-(0970   movw    $0, %ax                 # Zero segments not read\
-y for use) 314.533 Tj
-0 -227.8407 Td
-(0971   movw    %ax, %fs                # -> FS) 200.9517 Tj
-0 -237.334 Td
-(0972   movw    %ax, %gs                # -> GS) 200.9517 Tj
-0 -246.8274 Td
-(0973 ) 21.8426 Tj
-0 -256.3207 Td
-(0974   # Set up the stack pointer and call into C.) 218.4257 Tj
-0 -265.8141 Td
-(0975   movl    $start, %esp) 117.9499 Tj
-0 -275.3075 Td
-(0976   call    bootmain) 100.4758 Tj
-0 -284.8008 Td
-(0977 ) 21.8426 Tj
-0 -294.2942 Td
-(0978   # If bootmain returns \(it shouldn't\), trigger a Bochs) 262.1109 Tj
-0 -303.7875 Td
-(0979   # breakpoint if running under Bochs, then loop.) 235.8998 Tj
-0 -313.2809 Td
-(0980   movw    $0x8a00, %ax            # 0x8a00 -> port 0x8a00) 270.8479 Tj
-0 -322.7743 Td
-(0981   movw    %ax, %dx) 100.4758 Tj
-0 -332.2676 Td
-(0982   outw    %ax, %dx) 100.4758 Tj
-0 -341.761 Td
-(0983   movw    $0x8e00, %ax            # 0x8e00 -> port 0x8a00) 270.8479 Tj
-0 -351.2543 Td
-(0984   outw    %ax, %dx) 100.4758 Tj
-0 -360.7477 Td
-(0985 spin:) 43.6851 Tj
-0 -370.2411 Td
-(0986   jmp     spin) 83.0018 Tj
-0 -379.7344 Td
-(0987 ) 21.8426 Tj
-0 -389.2278 Td
-(0988 # Bootstrap GDT) 87.3703 Tj
-0 -398.7211 Td
-(0989 .p2align 2                                # force 4 byte a\
-lignment) 310.1645 Tj
-0 -408.2145 Td
-(0990 gdt:) 39.3166 Tj
-0 -417.7079 Td
-(0991   SEG_NULLASM                             # null seg) 249.0053 Tj
-0 -427.2012 Td
-(0992   SEG_ASM\(STA_X|STA_R, 0x0, 0xffffffff\)   # code seg) 249.0053 Tj
-0 -436.6946 Td
-(0993   SEG_ASM\(STA_W, 0x0, 0xffffffff\)         # data seg) 249.0053 Tj
-0 -446.1879 Td
-(0994 ) 21.8426 Tj
-0 -455.6813 Td
-(0995 gdtdesc:) 56.7907 Tj
-0 -465.1747 Td
-(0996   .word   \(gdtdesc - gdt - 1\)                           \
- # sizeof\(gdt\) - 1) 345.1126 Tj
-0 -474.668 Td
-(0997   .long   gdt                             # address gdt) 262.1109 Tj
-0 -484.1614 Td
-(0998 ) 21.8426 Tj
-0 -493.6547 Td
-(0999 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 09) 34.9481 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
-%%Page: 17 17
-%%BeginPageSetup
-%%PageOrientation: Landscape
-pdfStartPage
-180 rotate
--612 -792 translate
-0 0 612 792 re W
-%%EndPageSetup
-[] 0 d
-1 i
-0 j
-0 J
-10 M
-1 w
-/DeviceGray {} cs
-[0] sc
-/DeviceGray {} CS
-[0] SC
-false op
-false OP
-{} settransfer
-0 0 612 792 re
-W
-q
-q
-[0.1 0 0 0.1 0 0] cm
-q
-180 3960 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 738.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/bootother.S  Page 1) 183.4776 Tj
-0 -28.4801 Td
-(1000 #include "asm.h") 91.7388 Tj
-0 -37.9735 Td
-(1001 ) 21.8426 Tj
-0 -47.4668 Td
-(1002 # Each non-boot CPU \("AP"\) is started up in response to \
-a STARTUP) 305.796 Tj
-0 -56.9602 Td
-(1003 # IPI from the boot CPU.  Section B.4.2 of the Multi-Proce\
-ssor) 292.6905 Tj
-0 -66.4535 Td
-(1004 # Specification says that the AP will start in real mode w\
-ith CS:IP) 314.533 Tj
-0 -75.9469 Td
-(1005 # set to XY00:0000, where XY is an 8-bit value sent with t\
-he) 283.9534 Tj
-0 -85.4403 Td
-(1006 # STARTUP. Thus this code must start at a 4096-byte bounda\
-ry.) 288.322 Tj
-0 -94.9336 Td
-(1007 #) 26.2111 Tj
-0 -104.427 Td
-(1008 # Because this code sets DS to zero, it must sit) 231.5313 Tj
-0 -113.9203 Td
-(1009 # at an address in the low 2^16 bytes.) 187.8461 Tj
-0 -123.4137 Td
-(1010 #) 26.2111 Tj
-0 -132.9071 Td
-(1011 # Bootothers \(in main.c\) sends the STARTUPs, one at a ti\
-me.) 279.5849 Tj
-0 -142.4004 Td
-(1012 # It puts this code \(start\) at 0x7000.) 187.8461 Tj
-0 -151.8938 Td
-(1013 # It puts the correct %esp in start-4,) 187.8461 Tj
-0 -161.3871 Td
-(1014 # and the place to jump to in start-8.) 187.8461 Tj
-0 -170.8805 Td
-(1015 #) 26.2111 Tj
-0 -180.3739 Td
-(1016 # This code is identical to bootasm.S except:) 218.4257 Tj
-0 -189.8672 Td
-(1017 #   - it does not need to enable A20) 179.1091 Tj
-0 -199.3606 Td
-(1018 #   - it uses the address at start-4 for the %esp) 235.8998 Tj
-0 -208.8539 Td
-(1019 #   - it jumps to the address at start-8 instead of callin\
-g bootmain) 318.9016 Tj
-0 -218.3473 Td
-(1020 ) 21.8426 Tj
-0 -227.8407 Td
-(1021 #define SEG_KCODE 1  // kernel code) 174.7406 Tj
-0 -237.334 Td
-(1022 #define SEG_KDATA 2  // kernel data+stack) 200.9517 Tj
-0 -246.8274 Td
-(1023 ) 21.8426 Tj
-0 -256.3207 Td
-(1024 #define CR0_PE    1  // protected mode enable bit) 235.8998 Tj
-0 -265.8141 Td
-(1025 ) 21.8426 Tj
-0 -275.3075 Td
-(1026 .code16                       # Assemble for 16-bit mode) 266.4794 Tj
-0 -284.8008 Td
-(1027 .globl start) 74.2647 Tj
-0 -294.2942 Td
-(1028 start:) 48.0537 Tj
-0 -303.7875 Td
-(1029   cli                         # Disable interrupts) 240.2683 Tj
-0 -313.2809 Td
-(1030 ) 21.8426 Tj
-0 -322.7743 Td
-(1031   # Set up the important data segment registers \(DS, ES, \
-SS\).) 288.322 Tj
-0 -332.2676 Td
-(1032   xorw    %ax,%ax             # Segment number zero) 244.6368 Tj
-0 -341.761 Td
-(1033   movw    %ax,%ds             # -> Data Segment) 227.1628 Tj
-0 -351.2543 Td
-(1034   movw    %ax,%es             # -> Extra Segment) 231.5313 Tj
-0 -360.7477 Td
-(1035   movw    %ax,%ss             # -> Stack Segment) 231.5313 Tj
-0 -370.2411 Td
-(1036 ) 21.8426 Tj
-0 -379.7344 Td
-(1037 ) 21.8426 Tj
-0 -389.2278 Td
-(1038 ) 21.8426 Tj
-0 -398.7211 Td
-(1039 ) 21.8426 Tj
-0 -408.2145 Td
-(1040 ) 21.8426 Tj
-0 -417.7079 Td
-(1041 ) 21.8426 Tj
-0 -427.2012 Td
-(1042 ) 21.8426 Tj
-0 -436.6946 Td
-(1043 ) 21.8426 Tj
-0 -446.1879 Td
-(1044 ) 21.8426 Tj
-0 -455.6813 Td
-(1045 ) 21.8426 Tj
-0 -465.1747 Td
-(1046 ) 21.8426 Tj
-0 -474.668 Td
-(1047 ) 21.8426 Tj
-0 -484.1614 Td
-(1048 ) 21.8426 Tj
-0 -493.6547 Td
-(1049 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 10) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/bootother.S  Page 2) 183.4776 Tj
-0 -28.4801 Td
-(1050   # Switch from real to protected mode, using a bootstrap \
-GDT) 288.322 Tj
-0 -37.9735 Td
-(1051   # and segment translation that makes virtual addresses) 266.4794 Tj
-0 -47.4668 Td
-(1052   # identical to physical addresses, so that the) 231.5313 Tj
-0 -56.9602 Td
-(1053   # effective memory map does not change during the switch\
-.) 279.5849 Tj
-0 -66.4535 Td
-(1054   lgdt    gdtdesc) 96.1073 Tj
-0 -75.9469 Td
-(1055   movl    %cr0, %eax) 109.2129 Tj
-0 -85.4403 Td
-(1056   orl     $CR0_PE, %eax) 122.3184 Tj
-0 -94.9336 Td
-(1057   movl    %eax, %cr0) 109.2129 Tj
-0 -104.427 Td
-(1058 ) 21.8426 Tj
-0 -113.9203 Td
-(1059   # Jump to next instruction, but in 32-bit code segment.) 270.8479 Tj
-0 -123.4137 Td
-(1060   # Switches processor into 32-bit mode.) 196.5831 Tj
-0 -132.9071 Td
-(1061   ljmp    $\(SEG_KCODE<<3\), $start32) 174.7406 Tj
-0 -142.4004 Td
-(1062 ) 21.8426 Tj
-0 -151.8938 Td
-(1063 .code32                       # Assemble for 32-bit mode) 266.4794 Tj
-0 -161.3871 Td
-(1064 start32:) 56.7907 Tj
-0 -170.8805 Td
-(1065   # Set up the protected-mode data segment registers) 249.0053 Tj
-0 -180.3739 Td
-(1066   movw    $\(SEG_KDATA<<3\), %ax    # Our data segment sel\
-ector) 288.322 Tj
-0 -189.8672 Td
-(1067   movw    %ax, %ds                # -> DS: Data Segment) 262.1109 Tj
-0 -199.3606 Td
-(1068   movw    %ax, %es                # -> ES: Extra Segment) 266.4794 Tj
-0 -208.8539 Td
-(1069   movw    %ax, %ss                # -> SS: Stack Segment) 266.4794 Tj
-0 -218.3473 Td
-(1070   movw    $0, %ax                 # Zero segments not read\
-y for use) 314.533 Tj
-0 -227.8407 Td
-(1071   movw    %ax, %fs                # -> FS) 200.9517 Tj
-0 -237.334 Td
-(1072   movw    %ax, %gs                # -> GS) 200.9517 Tj
-0 -246.8274 Td
-(1073 ) 21.8426 Tj
-0 -256.3207 Td
-(1074   # Set up the stack pointer and call into C.) 218.4257 Tj
-0 -265.8141 Td
-(1075   movl    start-4, %esp) 122.3184 Tj
-0 -275.3075 Td
-(1076   call) 48.0537 Tj
--2507.8 TJm
-(*\(start-8\)) 43.6851 Tj
-0 -284.8008 Td
-(1077 ) 21.8426 Tj
-0 -294.2942 Td
-(1078   # If the call returns \(it shouldn't\), trigger a Bochs) 262.1109 Tj
-0 -303.7875 Td
-(1079   # breakpoint if running under Bochs, then loop.) 235.8998 Tj
-0 -313.2809 Td
-(1080   movw    $0x8a00, %ax            # 0x8a00 -> port 0x8a00) 270.8479 Tj
-0 -322.7743 Td
-(1081   movw    %ax, %dx) 100.4758 Tj
-0 -332.2676 Td
-(1082   outw    %ax, %dx) 100.4758 Tj
-0 -341.761 Td
-(1083   movw    $0x8e00, %ax            # 0x8e00 -> port 0x8a00) 270.8479 Tj
-0 -351.2543 Td
-(1084   outw    %ax, %dx) 100.4758 Tj
-0 -360.7477 Td
-(1085 spin:) 43.6851 Tj
-0 -370.2411 Td
-(1086   jmp     spin) 83.0018 Tj
-0 -379.7344 Td
-(1087 ) 21.8426 Tj
-0 -389.2278 Td
-(1088 # Bootstrap GDT) 87.3703 Tj
-0 -398.7211 Td
-(1089 .p2align 2                                # force 4 byte a\
-lignment) 310.1645 Tj
-0 -408.2145 Td
-(1090 gdt:) 39.3166 Tj
-0 -417.7079 Td
-(1091   SEG_NULLASM                             # null seg) 249.0053 Tj
-0 -427.2012 Td
-(1092   SEG_ASM\(STA_X|STA_R, 0x0, 0xffffffff\)   # code seg) 249.0053 Tj
-0 -436.6946 Td
-(1093   SEG_ASM\(STA_W, 0x0, 0xffffffff\)         # data seg) 249.0053 Tj
-0 -446.1879 Td
-(1094 ) 21.8426 Tj
-0 -455.6813 Td
-(1095 gdtdesc:) 56.7907 Tj
-0 -465.1747 Td
-(1096   .word   \(gdtdesc - gdt - 1\)                           \
- # sizeof\(gdt\) - 1) 345.1126 Tj
-0 -474.668 Td
-(1097   .long   gdt                             # address gdt) 262.1109 Tj
-0 -484.1614 Td
-(1098 ) 21.8426 Tj
-0 -493.6547 Td
-(1099 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 10) 34.9481 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
-%%Page: 18 18
-%%BeginPageSetup
-%%PageOrientation: Landscape
-pdfStartPage
-180 rotate
--612 -792 translate
-0 0 612 792 re W
-%%EndPageSetup
-[] 0 d
-1 i
-0 j
-0 J
-10 M
-1 w
-/DeviceGray {} cs
-[0] sc
-/DeviceGray {} CS
-[0] SC
-false op
-false OP
-{} settransfer
-0 0 612 792 re
-W
-q
-q
-[0.1 0 0 0.1 0 0] cm
-q
-180 3960 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 738.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/bootmain.c  Page 1) 179.1091 Tj
-0 -28.4801 Td
-(1100 // Boot loader.) 87.3703 Tj
-0 -37.9735 Td
-(1101 //) 30.5796 Tj
-0 -47.4668 Td
-(1102 // Part of the boot sector, along with bootasm.S, which ca\
-lls bootmain\(\).) 340.7441 Tj
-0 -56.9602 Td
-(1103 // bootasm.S has put the processor into protected 32-bit m\
-ode.) 292.6905 Tj
-0 -66.4535 Td
-(1104 // bootmain\(\) loads an ELF kernel image from the disk st\
-arting at) 305.796 Tj
-0 -75.9469 Td
-(1105 // sector 1 and then jumps to the kernel entry routine.) 262.1109 Tj
-0 -85.4403 Td
-(1106 ) 21.8426 Tj
-0 -94.9336 Td
-(1107 #include "types.h") 100.4758 Tj
-0 -104.427 Td
-(1108 #include "elf.h") 91.7388 Tj
-0 -113.9203 Td
-(1109 #include "x86.h") 91.7388 Tj
-0 -123.4137 Td
-(1110 ) 21.8426 Tj
-0 -132.9071 Td
-(1111 #define SECTSIZE  512) 113.5814 Tj
-0 -142.4004 Td
-(1112 ) 21.8426 Tj
-0 -151.8938 Td
-(1113 void readseg\(uchar*, uint, uint\);) 166.0035 Tj
-0 -161.3871 Td
-(1114 ) 21.8426 Tj
-0 -170.8805 Td
-(1115 void) 39.3166 Tj
-0 -180.3739 Td
-(1116 bootmain\(void\)) 83.0018 Tj
-0 -189.8672 Td
-(1117 {) 26.2111 Tj
-0 -199.3606 Td
-(1118   struct elfhdr *elf;) 113.5814 Tj
-0 -208.8539 Td
-(1119   struct proghdr *ph, *eph;) 139.7925 Tj
-0 -218.3473 Td
-(1120   void \(*entry\)\(void\);) 117.9499 Tj
-0 -227.8407 Td
-(1121   uchar* va;) 74.2647 Tj
-0 -237.334 Td
-(1122 ) 21.8426 Tj
-0 -246.8274 Td
-(1123   elf = \(struct elfhdr*\)0x10000;  // scratch space) 240.2683 Tj
-0 -256.3207 Td
-(1124 ) 21.8426 Tj
-0 -265.8141 Td
-(1125   // Read 1st page off disk) 139.7925 Tj
-0 -275.3075 Td
-(1126   readseg\(\(uchar*\)elf, 4096, 0\);) 161.635 Tj
-0 -284.8008 Td
-(1127 ) 21.8426 Tj
-0 -294.2942 Td
-(1128   // Is this an ELF executable?) 157.2665 Tj
-0 -303.7875 Td
-(1129   if\(elf->magic != ELF_MAGIC\)) 148.5295 Tj
-0 -313.2809 Td
-(1130     return;  // let bootasm.S handle error) 205.3202 Tj
-0 -322.7743 Td
-(1131 ) 21.8426 Tj
-0 -332.2676 Td
-(1132   // Load each program segment \(ignores ph flags\).) 240.2683 Tj
-0 -341.761 Td
-(1133   ph = \(struct proghdr*\)\(\(uchar*\)elf + elf->phoff\);) 244.6368 Tj
-0 -351.2543 Td
-(1134   eph = ph + elf->phnum;) 126.6869 Tj
-0 -360.7477 Td
-(1135   for\(; ph < eph; ph++\) {) 131.0554 Tj
-0 -370.2411 Td
-(1136     va = \(uchar*\)\(ph->va & 0xFFFFFF\);) 183.4776 Tj
-0 -379.7344 Td
-(1137     readseg\(va, ph->filesz, ph->offset\);) 196.5831 Tj
-0 -389.2278 Td
-(1138     if\(ph->memsz > ph->filesz\)) 152.898 Tj
-0 -398.7211 Td
-(1139       stosb\(va + ph->filesz, 0, ph->memsz - ph->filesz\);) 266.4794 Tj
-0 -408.2145 Td
-(1140   }) 34.9481 Tj
-0 -417.7079 Td
-(1141 ) 21.8426 Tj
-0 -427.2012 Td
-(1142   // Call the entry point from the ELF header.) 222.7942 Tj
-0 -436.6946 Td
-(1143   // Does not return!) 113.5814 Tj
-0 -446.1879 Td
-(1144   entry = \(void\(*\)\(void\)\)\(elf->entry & 0xFFFFFF\);) 235.8998 Tj
-0 -455.6813 Td
-(1145   entry\(\);) 65.5277 Tj
-0 -465.1747 Td
-(1146 }) 26.2111 Tj
-0 -474.668 Td
-(1147 ) 21.8426 Tj
-0 -484.1614 Td
-(1148 ) 21.8426 Tj
-0 -493.6547 Td
-(1149 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 11) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/bootmain.c  Page 2) 179.1091 Tj
-0 -28.4801 Td
-(1150 void) 39.3166 Tj
-0 -37.9735 Td
-(1151 waitdisk\(void\)) 83.0018 Tj
-0 -47.4668 Td
-(1152 {) 26.2111 Tj
-0 -56.9602 Td
-(1153   // Wait for disk ready.) 131.0554 Tj
-0 -66.4535 Td
-(1154   while\(\(inb\(0x1F7\) & 0xC0\) != 0x40\)) 179.1091 Tj
-0 -75.9469 Td
-(1155     ;) 43.6851 Tj
-0 -85.4403 Td
-(1156 }) 26.2111 Tj
-0 -94.9336 Td
-(1157 ) 21.8426 Tj
-0 -104.427 Td
-(1158 // Read a single sector at offset into dst.) 209.6887 Tj
-0 -113.9203 Td
-(1159 void) 39.3166 Tj
-0 -123.4137 Td
-(1160 readsect\(void *dst, uint offset\)) 161.635 Tj
-0 -132.9071 Td
-(1161 {) 26.2111 Tj
-0 -142.4004 Td
-(1162   // Issue command.) 104.8443 Tj
-0 -151.8938 Td
-(1163   waitdisk\(\);) 78.6333 Tj
-0 -161.3871 Td
-(1164   outb\(0x1F2, 1\);   // count = 1) 161.635 Tj
-0 -170.8805 Td
-(1165   outb\(0x1F3, offset\);) 117.9499 Tj
-0 -180.3739 Td
-(1166   outb\(0x1F4, offset >> 8\);) 139.7925 Tj
-0 -189.8672 Td
-(1167   outb\(0x1F5, offset >> 16\);) 144.161 Tj
-0 -199.3606 Td
-(1168   outb\(0x1F6, \(offset >> 24\) | 0xE0\);) 183.4776 Tj
-0 -208.8539 Td
-(1169   outb\(0x1F7, 0x20\);  // cmd 0x20 - read sectors) 231.5313 Tj
-0 -218.3473 Td
-(1170 ) 21.8426 Tj
-0 -227.8407 Td
-(1171   // Read data.) 87.3703 Tj
-0 -237.334 Td
-(1172   waitdisk\(\);) 78.6333 Tj
-0 -246.8274 Td
-(1173   insl\(0x1F0, dst, SECTSIZE/4\);) 157.2665 Tj
-0 -256.3207 Td
-(1174 }) 26.2111 Tj
-0 -265.8141 Td
-(1175 ) 21.8426 Tj
-0 -275.3075 Td
-(1176 // Read 'count' bytes at 'offset' from kernel into virtual\
- address 'va'.) 336.3756 Tj
-0 -284.8008 Td
-(1177 // Might copy more than asked.) 152.898 Tj
-0 -294.2942 Td
-(1178 void) 39.3166 Tj
-0 -303.7875 Td
-(1179 readseg\(uchar* va, uint count, uint offset\)) 209.6887 Tj
-0 -313.2809 Td
-(1180 {) 26.2111 Tj
-0 -322.7743 Td
-(1181   uchar* eva;) 78.6333 Tj
-0 -332.2676 Td
-(1182 ) 21.8426 Tj
-0 -341.761 Td
-(1183   eva = va + count;) 104.8443 Tj
-0 -351.2543 Td
-(1184 ) 21.8426 Tj
-0 -360.7477 Td
-(1185   // Round down to sector boundary.) 174.7406 Tj
-0 -370.2411 Td
-(1186   va -= offset % SECTSIZE;) 135.4239 Tj
-0 -379.7344 Td
-(1187 ) 21.8426 Tj
-0 -389.2278 Td
-(1188   // Translate from bytes to sectors; kernel starts at sec\
-tor 1.) 301.4275 Tj
-0 -398.7211 Td
-(1189   offset = \(offset / SECTSIZE\) + 1;) 174.7406 Tj
-0 -408.2145 Td
-(1190 ) 21.8426 Tj
-0 -417.7079 Td
-(1191   // If this is too slow, we could read lots of sectors at\
- a time.) 310.1645 Tj
-0 -427.2012 Td
-(1192   // We'd write more to memory than asked, but it doesn't \
-matter --) 314.533 Tj
-0 -436.6946 Td
-(1193   // we load in increasing order.) 166.0035 Tj
-0 -446.1879 Td
-(1194   for\(; va < eva; va += SECTSIZE, offset++\)) 209.6887 Tj
-0 -455.6813 Td
-(1195     readsect\(va, offset\);) 131.0554 Tj
-0 -465.1747 Td
-(1196 }) 26.2111 Tj
-0 -474.668 Td
-(1197 ) 21.8426 Tj
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-(1198 ) 21.8426 Tj
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-(Sheet 11) 34.9481 Tj
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-(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
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-W
-/DeviceGray {} CS
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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
-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
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-%%PageOrientation: Landscape
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-(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
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-(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
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-[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
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-Q
-showpage
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-pdfEndPage
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-%%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
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-[0] SC
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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/spinlock.c  Page 2) 179.1091 Tj
-0 -28.4801 Td
-(1400 // Release the lock.) 109.2129 Tj
-0 -37.9735 Td
-(1401 void) 39.3166 Tj
-0 -47.4668 Td
-(1402 release\(struct spinlock *lk\)) 144.161 Tj
-0 -56.9602 Td
-(1403 {) 26.2111 Tj
-0 -66.4535 Td
-(1404   if\(!holding\(lk\)\)) 100.4758 Tj
-0 -75.9469 Td
-(1405     panic\("release"\);) 113.5814 Tj
-0 -85.4403 Td
-(1406 ) 21.8426 Tj
-0 -94.9336 Td
-(1407   lk->pcs[0] = 0;) 96.1073 Tj
-0 -104.427 Td
-(1408   lk->cpu = 0;) 83.0018 Tj
-0 -113.9203 Td
-(1409 ) 21.8426 Tj
-0 -123.4137 Td
-(1410   // The xchg serializes, so that reads before release are) 275.2164 Tj
-0 -132.9071 Td
-(1411   // not reordered after it.  The 1996 PentiumPro manual \(\
-Volume 3,) 314.533 Tj
-0 -142.4004 Td
-(1412   // 7.2\) says reads can be carried out speculatively and\
- in) 283.9534 Tj
-0 -151.8938 Td
-(1413   // any order, which implies we need to serialize here.) 266.4794 Tj
-0 -161.3871 Td
-(1414   // But the 2007 Intel 64 Architecture Memory Ordering Wh\
-ite) 288.322 Tj
-0 -170.8805 Td
-(1415   // Paper says that Intel 64 and IA-32 will not move a lo\
-ad) 283.9534 Tj
-0 -180.3739 Td
-(1416   // after a store. So lock->locked = 0 would work here.) 266.4794 Tj
-0 -189.8672 Td
-(1417   // The xchg being asm volatile ensures gcc emits it afte\
-r) 279.5849 Tj
-0 -199.3606 Td
-(1418   // the above assignments \(and after the critical sectio\
-n\).) 283.9534 Tj
-0 -208.8539 Td
-(1419   xchg\(&lk->locked, 0\);) 122.3184 Tj
-0 -218.3473 Td
-(1420 ) 21.8426 Tj
-0 -227.8407 Td
-(1421   popcli\(\);) 69.8962 Tj
-0 -237.334 Td
-(1422 }) 26.2111 Tj
-0 -246.8274 Td
-(1423 ) 21.8426 Tj
-0 -256.3207 Td
-(1424 // Record the current call stack in pcs[] by following the\
- %ebp chain.) 327.6386 Tj
-0 -265.8141 Td
-(1425 void) 39.3166 Tj
-0 -275.3075 Td
-(1426 getcallerpcs\(void *v, uint pcs[]\)) 166.0035 Tj
-0 -284.8008 Td
-(1427 {) 26.2111 Tj
-0 -294.2942 Td
-(1428   uint *ebp;) 74.2647 Tj
-0 -303.7875 Td
-(1429   int i;) 56.7907 Tj
-0 -313.2809 Td
-(1430 ) 21.8426 Tj
-0 -322.7743 Td
-(1431   ebp = \(uint*\)v - 2;) 113.5814 Tj
-0 -332.2676 Td
-(1432   for\(i = 0; i < 10; i++\){) 135.4239 Tj
-0 -341.761 Td
-(1433     if\(ebp == 0 || ebp == \(uint*\)0xffffffff\)) 214.0572 Tj
-0 -351.2543 Td
-(1434       break;) 74.2647 Tj
-0 -360.7477 Td
-(1435     pcs[i] = ebp[1];     // saved %eip) 187.8461 Tj
-0 -370.2411 Td
-(1436     ebp = \(uint*\)ebp[0]; // saved %ebp) 187.8461 Tj
-0 -379.7344 Td
-(1437   }) 34.9481 Tj
-0 -389.2278 Td
-(1438   for\(; i < 10; i++\)) 109.2129 Tj
-0 -398.7211 Td
-(1439     pcs[i] = 0;) 87.3703 Tj
-0 -408.2145 Td
-(1440 }) 26.2111 Tj
-0 -417.7079 Td
-(1441 ) 21.8426 Tj
-0 -427.2012 Td
-(1442 // Check whether this cpu is holding the lock.) 222.7942 Tj
-0 -436.6946 Td
-(1443 int) 34.9481 Tj
-0 -446.1879 Td
-(1444 holding\(struct spinlock *lock\)) 152.898 Tj
-0 -455.6813 Td
-(1445 {) 26.2111 Tj
-0 -465.1747 Td
-(1446   return lock->locked && lock->cpu == cpu;) 205.3202 Tj
-0 -474.668 Td
-(1447 }) 26.2111 Tj
-0 -484.1614 Td
-(1448 ) 21.8426 Tj
-0 -493.6547 Td
-(1449 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 14) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/spinlock.c  Page 3) 179.1091 Tj
-0 -28.4801 Td
-(1450 // Pushcli/popcli are like cli/sti except that they are ma\
-tched:) 301.4275 Tj
-0 -37.9735 Td
-(1451 // it takes two popcli to undo two pushcli.  Also, if inte\
-rrupts) 301.4275 Tj
-0 -47.4668 Td
-(1452 // are off, then pushcli, popcli leaves them off.) 235.8998 Tj
-0 -56.9602 Td
-(1453 ) 21.8426 Tj
-0 -66.4535 Td
-(1454 void) 39.3166 Tj
-0 -75.9469 Td
-(1455 pushcli\(void\)) 78.6333 Tj
-0 -85.4403 Td
-(1456 {) 26.2111 Tj
-0 -94.9336 Td
-(1457   int eflags;) 78.6333 Tj
-0 -104.427 Td
-(1458 ) 21.8426 Tj
-0 -113.9203 Td
-(1459   eflags = readeflags\(\);) 126.6869 Tj
-0 -123.4137 Td
-(1460   cli\(\);) 56.7907 Tj
-0 -132.9071 Td
-(1461   if\(cpu->ncli++ == 0\)) 117.9499 Tj
-0 -142.4004 Td
-(1462     cpu->intena = eflags & FL_IF;) 166.0035 Tj
-0 -151.8938 Td
-(1463 }) 26.2111 Tj
-0 -161.3871 Td
-(1464 ) 21.8426 Tj
-0 -170.8805 Td
-(1465 void) 39.3166 Tj
-0 -180.3739 Td
-(1466 popcli\(void\)) 74.2647 Tj
-0 -189.8672 Td
-(1467 {) 26.2111 Tj
-0 -199.3606 Td
-(1468   if\(readeflags\(\)&FL_IF\)) 126.6869 Tj
-0 -208.8539 Td
-(1469     panic\("popcli - interruptible"\);) 179.1091 Tj
-0 -218.3473 Td
-(1470   if\(--cpu->ncli < 0\)) 113.5814 Tj
-0 -227.8407 Td
-(1471     panic\("popcli"\);) 109.2129 Tj
-0 -237.334 Td
-(1472   if\(cpu->ncli == 0 && cpu->intena\)) 174.7406 Tj
-0 -246.8274 Td
-(1473     sti\(\);) 65.5277 Tj
-0 -256.3207 Td
-(1474 }) 26.2111 Tj
-0 -265.8141 Td
-(1475 ) 21.8426 Tj
-0 -275.3075 Td
-(1476 ) 21.8426 Tj
-0 -284.8008 Td
-(1477 ) 21.8426 Tj
-0 -294.2942 Td
-(1478 ) 21.8426 Tj
-0 -303.7875 Td
-(1479 ) 21.8426 Tj
-0 -313.2809 Td
-(1480 ) 21.8426 Tj
-0 -322.7743 Td
-(1481 ) 21.8426 Tj
-0 -332.2676 Td
-(1482 ) 21.8426 Tj
-0 -341.761 Td
-(1483 ) 21.8426 Tj
-0 -351.2543 Td
-(1484 ) 21.8426 Tj
-0 -360.7477 Td
-(1485 ) 21.8426 Tj
-0 -370.2411 Td
-(1486 ) 21.8426 Tj
-0 -379.7344 Td
-(1487 ) 21.8426 Tj
-0 -389.2278 Td
-(1488 ) 21.8426 Tj
-0 -398.7211 Td
-(1489 ) 21.8426 Tj
-0 -408.2145 Td
-(1490 ) 21.8426 Tj
-0 -417.7079 Td
-(1491 ) 21.8426 Tj
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-(1492 ) 21.8426 Tj
-0 -436.6946 Td
-(1493 ) 21.8426 Tj
-0 -446.1879 Td
-(1494 ) 21.8426 Tj
-0 -455.6813 Td
-(1495 ) 21.8426 Tj
-0 -465.1747 Td
-(1496 ) 21.8426 Tj
-0 -474.668 Td
-(1497 ) 21.8426 Tj
-0 -484.1614 Td
-(1498 ) 21.8426 Tj
-0 -493.6547 Td
-(1499 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 14) 34.9481 Tj
-Q
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-Q
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-%%BeginPageSetup
-%%PageOrientation: Landscape
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-[] 0 d
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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
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/proc.h  Page 1) 161.635 Tj
-0 -28.4801 Td
-(1500 // Segments in proc->gdt.) 131.0554 Tj
-0 -37.9735 Td
-(1501 // Also known to bootasm.S and trapasm.S) 196.5831 Tj
-0 -47.4668 Td
-(1502 #define SEG_KCODE 1  // kernel code) 174.7406 Tj
-0 -56.9602 Td
-(1503 #define SEG_KDATA 2  // kernel data+stack) 200.9517 Tj
-0 -66.4535 Td
-(1504 #define SEG_KCPU  3  // kernel per-cpu data) 209.6887 Tj
-0 -75.9469 Td
-(1505 #define SEG_UCODE 4) 104.8443 Tj
-0 -85.4403 Td
-(1506 #define SEG_UDATA 5) 104.8443 Tj
-0 -94.9336 Td
-(1507 #define SEG_TSS   6  // this process's task state) 235.8998 Tj
-0 -104.427 Td
-(1508 #define NSEGS     7) 104.8443 Tj
-0 -113.9203 Td
-(1509 ) 21.8426 Tj
-0 -123.4137 Td
-(1510 // Saved registers for kernel context switches.) 227.1628 Tj
-0 -132.9071 Td
-(1511 // Don't need to save all the segment registers \(%cs, etc\
-\),) 279.5849 Tj
-0 -142.4004 Td
-(1512 // because they are constant across kernel contexts.) 249.0053 Tj
-0 -151.8938 Td
-(1513 // Don't need to save %eax, %ecx, %edx, because the) 244.6368 Tj
-0 -161.3871 Td
-(1514 // x86 convention is that the caller has saved them.) 249.0053 Tj
-0 -170.8805 Td
-(1515 // Contexts are stored at the bottom of the stack they) 257.7424 Tj
-0 -180.3739 Td
-(1516 // describe; the stack pointer is the address of the conte\
-xt.) 288.322 Tj
-0 -189.8672 Td
-(1517 // The layout of the context must match the code in swtch.\
-S.) 283.9534 Tj
-0 -199.3606 Td
-(1518 struct context {) 91.7388 Tj
-0 -208.8539 Td
-(1519   uint edi;) 69.8962 Tj
-0 -218.3473 Td
-(1520   uint esi;) 69.8962 Tj
-0 -227.8407 Td
-(1521   uint ebx;) 69.8962 Tj
-0 -237.334 Td
-(1522   uint ebp;) 69.8962 Tj
-0 -246.8274 Td
-(1523   uint eip;) 69.8962 Tj
-0 -256.3207 Td
-(1524 };) 30.5796 Tj
-0 -265.8141 Td
-(1525 ) 21.8426 Tj
-0 -275.3075 Td
-(1526 enum procstate { UNUSED, EMBRYO, SLEEPING, RUNNABLE, RUNNI\
-NG, ZOMBIE };) 332.0071 Tj
-0 -284.8008 Td
-(1527 ) 21.8426 Tj
-0 -294.2942 Td
-(1528 // Per-process state) 109.2129 Tj
-0 -303.7875 Td
-(1529 struct proc {) 78.6333 Tj
-0 -313.2809 Td
-(1530   char *mem;                   // Start of process memory \
-\(kernel address\)) 345.1126 Tj
-0 -322.7743 Td
-(1531   uint sz;                     // Size of process memory \(\
-bytes\)) 301.4275 Tj
-0 -332.2676 Td
-(1532   char *kstack;                // Bottom of kernel stack f\
-or this process) 340.7441 Tj
-0 -341.761 Td
-(1533   enum procstate state;        // Process state) 227.1628 Tj
-0 -351.2543 Td
-(1534   volatile int pid;            // Process ID) 214.0572 Tj
-0 -360.7477 Td
-(1535   struct proc *parent;         // Parent process) 231.5313 Tj
-0 -370.2411 Td
-(1536   struct trapframe *tf;        // Trap frame for current s\
-yscall) 301.4275 Tj
-0 -379.7344 Td
-(1537   struct context *context;     // Switch here to run proce\
-ss) 283.9534 Tj
-0 -389.2278 Td
-(1538   void *chan;                  // If non-zero, sleeping on\
- chan) 297.059 Tj
-0 -398.7211 Td
-(1539   int killed;                  // If non-zero, have been k\
-illed) 297.059 Tj
-0 -408.2145 Td
-(1540   struct file *ofile[NOFILE];  // Open files) 214.0572 Tj
-0 -417.7079 Td
-(1541   struct inode *cwd;           // Current directory) 244.6368 Tj
-0 -427.2012 Td
-(1542   char name[16];               // Process name \(debugging\
-\)) 275.2164 Tj
-0 -436.6946 Td
-(1543 };) 30.5796 Tj
-0 -446.1879 Td
-(1544 ) 21.8426 Tj
-0 -455.6813 Td
-(1545 ) 21.8426 Tj
-0 -465.1747 Td
-(1546 ) 21.8426 Tj
-0 -474.668 Td
-(1547 ) 21.8426 Tj
-0 -484.1614 Td
-(1548 ) 21.8426 Tj
-0 -493.6547 Td
-(1549 ) 21.8426 Tj
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-(Sheet 15) 34.9481 Tj
-Q
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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
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/proc.h  Page 2) 161.635 Tj
-0 -28.4801 Td
-(1550 // Process memory is laid out contiguously, low addresses \
-first:) 301.4275 Tj
-0 -37.9735 Td
-(1551 //   text) 61.1592 Tj
-0 -47.4668 Td
-(1552 //   original data and bss) 135.4239 Tj
-0 -56.9602 Td
-(1553 //   fixed-size stack) 113.5814 Tj
-0 -66.4535 Td
-(1554 //   expandable heap) 109.2129 Tj
-0 -75.9469 Td
-(1555 ) 21.8426 Tj
-0 -85.4403 Td
-(1556 // Per-CPU state) 91.7388 Tj
-0 -94.9336 Td
-(1557 struct cpu {) 74.2647 Tj
-0 -104.427 Td
-(1558   uchar id;                    // Local APIC ID; index int\
-o cpus[] below) 336.3756 Tj
-0 -113.9203 Td
-(1559   struct context *scheduler;   // Switch here to enter sch\
-eduler) 301.4275 Tj
-0 -123.4137 Td
-(1560   struct taskstate ts;         // Used by x86 to find stac\
-k for interrupt) 340.7441 Tj
-0 -132.9071 Td
-(1561   struct segdesc gdt[NSEGS];   // x86 global descriptor ta\
-ble) 288.322 Tj
-0 -142.4004 Td
-(1562   volatile uint booted;        // Has the CPU started?) 257.7424 Tj
-0 -151.8938 Td
-(1563   int ncli;                    // Depth of pushcli nesting\
-.) 279.5849 Tj
-0 -161.3871 Td
-(1564   int intena;                  // Were interrupts enabled \
-before pushcli?) 340.7441 Tj
-0 -170.8805 Td
-(1565 ) 21.8426 Tj
-0 -180.3739 Td
-(1566   // Cpu-local storage variables; see below) 209.6887 Tj
-0 -189.8672 Td
-(1567   struct cpu *cpu;) 100.4758 Tj
-0 -199.3606 Td
-(1568   struct proc *proc;) 109.2129 Tj
-0 -208.8539 Td
-(1569 };) 30.5796 Tj
-0 -218.3473 Td
-(1570 ) 21.8426 Tj
-0 -227.8407 Td
-(1571 extern struct cpu cpus[NCPU];) 148.5295 Tj
-0 -237.334 Td
-(1572 extern int ncpu;) 91.7388 Tj
-0 -246.8274 Td
-(1573 ) 21.8426 Tj
-0 -256.3207 Td
-(1574 // Per-CPU variables, holding pointers to the) 218.4257 Tj
-0 -265.8141 Td
-(1575 // current cpu and to the current process.) 205.3202 Tj
-0 -275.3075 Td
-(1576 // The asm suffix tells gcc to use "%gs:0" to refer to cpu) 275.2164 Tj
-0 -284.8008 Td
-(1577 // and "%gs:4" to refer to proc.  ksegment sets up the) 257.7424 Tj
-0 -294.2942 Td
-(1578 // %gs segment register so that %gs refers to the memory) 266.4794 Tj
-0 -303.7875 Td
-(1579 // holding those two variables in the local cpu's struct c\
-pu.) 288.322 Tj
-0 -313.2809 Td
-(1580 // This is similar to how thread-local variables are imple\
-mented) 301.4275 Tj
-0 -322.7743 Td
-(1581 // in thread libraries such as Linux pthreads.) 222.7942 Tj
-0 -332.2676 Td
-(1582 extern struct cpu *cpu asm\("%gs:0"\);       // This cpu.) 262.1109 Tj
-0 -341.761 Td
-(1583 extern struct proc *proc asm\("%gs:4"\);     // Current pr\
-oc on this cpu.) 332.0071 Tj
-0 -351.2543 Td
-(1584 ) 21.8426 Tj
-0 -360.7477 Td
-(1585 ) 21.8426 Tj
-0 -370.2411 Td
-(1586 ) 21.8426 Tj
-0 -379.7344 Td
-(1587 ) 21.8426 Tj
-0 -389.2278 Td
-(1588 ) 21.8426 Tj
-0 -398.7211 Td
-(1589 ) 21.8426 Tj
-0 -408.2145 Td
-(1590 ) 21.8426 Tj
-0 -417.7079 Td
-(1591 ) 21.8426 Tj
-0 -427.2012 Td
-(1592 ) 21.8426 Tj
-0 -436.6946 Td
-(1593 ) 21.8426 Tj
-0 -446.1879 Td
-(1594 ) 21.8426 Tj
-0 -455.6813 Td
-(1595 ) 21.8426 Tj
-0 -465.1747 Td
-(1596 ) 21.8426 Tj
-0 -474.668 Td
-(1597 ) 21.8426 Tj
-0 -484.1614 Td
-(1598 ) 21.8426 Tj
-0 -493.6547 Td
-(1599 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 15) 34.9481 Tj
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-[] 0 d
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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
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/proc.c  Page 1) 161.635 Tj
-0 -28.4801 Td
-(1600 #include "types.h") 100.4758 Tj
-0 -37.9735 Td
-(1601 #include "defs.h") 96.1073 Tj
-0 -47.4668 Td
-(1602 #include "param.h") 100.4758 Tj
-0 -56.9602 Td
-(1603 #include "mmu.h") 91.7388 Tj
-0 -66.4535 Td
-(1604 #include "x86.h") 91.7388 Tj
-0 -75.9469 Td
-(1605 #include "proc.h") 96.1073 Tj
-0 -85.4403 Td
-(1606 #include "spinlock.h") 113.5814 Tj
-0 -94.9336 Td
-(1607 ) 21.8426 Tj
-0 -104.427 Td
-(1608 struct {) 56.7907 Tj
-0 -113.9203 Td
-(1609   struct spinlock lock;) 122.3184 Tj
-0 -123.4137 Td
-(1610   struct proc proc[NPROC];) 135.4239 Tj
-0 -132.9071 Td
-(1611 } ptable;) 61.1592 Tj
-0 -142.4004 Td
-(1612 ) 21.8426 Tj
-0 -151.8938 Td
-(1613 static struct proc *initproc;) 148.5295 Tj
-0 -161.3871 Td
-(1614 ) 21.8426 Tj
-0 -170.8805 Td
-(1615 int nextpid = 1;) 91.7388 Tj
-0 -180.3739 Td
-(1616 extern void forkret\(void\);) 135.4239 Tj
-0 -189.8672 Td
-(1617 extern void trapret\(void\);) 135.4239 Tj
-0 -199.3606 Td
-(1618 ) 21.8426 Tj
-0 -208.8539 Td
-(1619 void) 39.3166 Tj
-0 -218.3473 Td
-(1620 pinit\(void\)) 69.8962 Tj
-0 -227.8407 Td
-(1621 {) 26.2111 Tj
-0 -237.334 Td
-(1622   initlock\(&ptable.lock, "ptable"\);) 174.7406 Tj
-0 -246.8274 Td
-(1623 }) 26.2111 Tj
-0 -256.3207 Td
-(1624 ) 21.8426 Tj
-0 -265.8141 Td
-(1625 ) 21.8426 Tj
-0 -275.3075 Td
-(1626 ) 21.8426 Tj
-0 -284.8008 Td
-(1627 ) 21.8426 Tj
-0 -294.2942 Td
-(1628 ) 21.8426 Tj
-0 -303.7875 Td
-(1629 ) 21.8426 Tj
-0 -313.2809 Td
-(1630 ) 21.8426 Tj
-0 -322.7743 Td
-(1631 ) 21.8426 Tj
-0 -332.2676 Td
-(1632 ) 21.8426 Tj
-0 -341.761 Td
-(1633 ) 21.8426 Tj
-0 -351.2543 Td
-(1634 ) 21.8426 Tj
-0 -360.7477 Td
-(1635 ) 21.8426 Tj
-0 -370.2411 Td
-(1636 ) 21.8426 Tj
-0 -379.7344 Td
-(1637 ) 21.8426 Tj
-0 -389.2278 Td
-(1638 ) 21.8426 Tj
-0 -398.7211 Td
-(1639 ) 21.8426 Tj
-0 -408.2145 Td
-(1640 ) 21.8426 Tj
-0 -417.7079 Td
-(1641 ) 21.8426 Tj
-0 -427.2012 Td
-(1642 ) 21.8426 Tj
-0 -436.6946 Td
-(1643 ) 21.8426 Tj
-0 -446.1879 Td
-(1644 ) 21.8426 Tj
-0 -455.6813 Td
-(1645 ) 21.8426 Tj
-0 -465.1747 Td
-(1646 ) 21.8426 Tj
-0 -474.668 Td
-(1647 ) 21.8426 Tj
-0 -484.1614 Td
-(1648 ) 21.8426 Tj
-0 -493.6547 Td
-(1649 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 16) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/proc.c  Page 2) 161.635 Tj
-0 -28.4801 Td
-(1650 // Print a process listing to console.  For debugging.) 257.7424 Tj
-0 -37.9735 Td
-(1651 // Runs when user types ^P on console.) 187.8461 Tj
-0 -47.4668 Td
-(1652 // No lock to avoid wedging a stuck machine further.) 249.0053 Tj
-0 -56.9602 Td
-(1653 void) 39.3166 Tj
-0 -66.4535 Td
-(1654 procdump\(void\)) 83.0018 Tj
-0 -75.9469 Td
-(1655 {) 26.2111 Tj
-0 -85.4403 Td
-(1656   static char *states[] = {) 139.7925 Tj
-0 -94.9336 Td
-(1657   [UNUSED]    "unused",) 122.3184 Tj
-0 -104.427 Td
-(1658   [EMBRYO]    "embryo",) 122.3184 Tj
-0 -113.9203 Td
-(1659   [SLEEPING]  "sleep ",) 122.3184 Tj
-0 -123.4137 Td
-(1660   [RUNNABLE]  "runble",) 122.3184 Tj
-0 -132.9071 Td
-(1661   [RUNNING]   "run   ",) 122.3184 Tj
-0 -142.4004 Td
-(1662   [ZOMBIE]    "zombie") 117.9499 Tj
-0 -151.8938 Td
-(1663   };) 39.3166 Tj
-0 -161.3871 Td
-(1664   int i;) 56.7907 Tj
-0 -170.8805 Td
-(1665   struct proc *p;) 96.1073 Tj
-0 -180.3739 Td
-(1666   char *state;) 83.0018 Tj
-0 -189.8672 Td
-(1667   uint pc[10];) 83.0018 Tj
-0 -199.3606 Td
-(1668 ) 21.8426 Tj
-0 -208.8539 Td
-(1669   for\(p = ptable.proc; p < &ptable.proc[NPROC]; p++\){) 253.3738 Tj
-0 -218.3473 Td
-(1670     if\(p->state == UNUSED\)) 135.4239 Tj
-0 -227.8407 Td
-(1671       continue;) 87.3703 Tj
-0 -237.334 Td
-(1672     if\(p->state >= 0 && p->state < NELEM\(states\) && sta\
-tes[p->state]\)) 323.2701 Tj
-0 -246.8274 Td
-(1673       state = states[p->state];) 157.2665 Tj
-0 -256.3207 Td
-(1674     else) 56.7907 Tj
-0 -265.8141 Td
-(1675       state = "???";) 109.2129 Tj
-0 -275.3075 Td
-(1676     cprintf\("%d %s %s", p->pid, state, p->name\);) 231.5313 Tj
-0 -284.8008 Td
-(1677     if\(p->state == SLEEPING\){) 148.5295 Tj
-0 -294.2942 Td
-(1678       getcallerpcs\(\(uint*\)p->context->ebp+2, pc\);) 235.8998 Tj
-0 -303.7875 Td
-(1679       for\(i=0; i<10 && pc[i] != 0; i++\)) 192.2146 Tj
-0 -313.2809 Td
-(1680         cprintf\(" %p", pc[i]\);) 152.898 Tj
-0 -322.7743 Td
-(1681     }) 43.6851 Tj
-0 -332.2676 Td
-(1682     cprintf\("\\n"\);) 100.4758 Tj
-0 -341.761 Td
-(1683   }) 34.9481 Tj
-0 -351.2543 Td
-(1684 }) 26.2111 Tj
-0 -360.7477 Td
-(1685 ) 21.8426 Tj
-0 -370.2411 Td
-(1686 ) 21.8426 Tj
-0 -379.7344 Td
-(1687 ) 21.8426 Tj
-0 -389.2278 Td
-(1688 ) 21.8426 Tj
-0 -398.7211 Td
-(1689 ) 21.8426 Tj
-0 -408.2145 Td
-(1690 ) 21.8426 Tj
-0 -417.7079 Td
-(1691 ) 21.8426 Tj
-0 -427.2012 Td
-(1692 ) 21.8426 Tj
-0 -436.6946 Td
-(1693 ) 21.8426 Tj
-0 -446.1879 Td
-(1694 ) 21.8426 Tj
-0 -455.6813 Td
-(1695 ) 21.8426 Tj
-0 -465.1747 Td
-(1696 ) 21.8426 Tj
-0 -474.668 Td
-(1697 ) 21.8426 Tj
-0 -484.1614 Td
-(1698 ) 21.8426 Tj
-0 -493.6547 Td
-(1699 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 16) 34.9481 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
-%%Page: 24 24
-%%BeginPageSetup
-%%PageOrientation: Landscape
-pdfStartPage
-180 rotate
--612 -792 translate
-0 0 612 792 re W
-%%EndPageSetup
-[] 0 d
-1 i
-0 j
-0 J
-10 M
-1 w
-/DeviceGray {} cs
-[0] sc
-/DeviceGray {} CS
-[0] SC
-false op
-false OP
-{} settransfer
-0 0 612 792 re
-W
-q
-q
-[0.1 0 0 0.1 0 0] cm
-q
-180 3960 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 738.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/proc.c  Page 3) 161.635 Tj
-0 -28.4801 Td
-(1700 // Set up CPU's kernel segment descriptors.) 209.6887 Tj
-0 -37.9735 Td
-(1701 // Run once at boot time on each CPU.) 183.4776 Tj
-0 -47.4668 Td
-(1702 void) 39.3166 Tj
-0 -56.9602 Td
-(1703 ksegment\(void\)) 83.0018 Tj
-0 -66.4535 Td
-(1704 {) 26.2111 Tj
-0 -75.9469 Td
-(1705   struct cpu *c;) 91.7388 Tj
-0 -85.4403 Td
-(1706 ) 21.8426 Tj
-0 -94.9336 Td
-(1707   c = &cpus[cpunum\(\)];) 117.9499 Tj
-0 -104.427 Td
-(1708   c->gdt[SEG_KCODE] = SEG\(STA_X|STA_R, 0, 0x100000 + 64*1\
-024-1, 0\);) 314.533 Tj
-0 -113.9203 Td
-(1709   c->gdt[SEG_KDATA] = SEG\(STA_W, 0, 0xffffffff, 0\);) 244.6368 Tj
-0 -123.4137 Td
-(1710   c->gdt[SEG_KCPU] = SEG\(STA_W, &c->cpu, 8, 0\);) 227.1628 Tj
-0 -132.9071 Td
-(1711   lgdt\(c->gdt, sizeof\(c->gdt\)\);) 157.2665 Tj
-0 -142.4004 Td
-(1712   loadgs\(SEG_KCPU << 3\);) 126.6869 Tj
-0 -151.8938 Td
-(1713 ) 21.8426 Tj
-0 -161.3871 Td
-(1714   // Initialize cpu-local storage.) 170.3721 Tj
-0 -170.8805 Td
-(1715   cpu = c;) 65.5277 Tj
-0 -180.3739 Td
-(1716   proc = 0;) 69.8962 Tj
-0 -189.8672 Td
-(1717 }) 26.2111 Tj
-0 -199.3606 Td
-(1718 ) 21.8426 Tj
-0 -208.8539 Td
-(1719 // Set up CPU's segment descriptors and current process ta\
-sk state.) 314.533 Tj
-0 -218.3473 Td
-(1720 void) 39.3166 Tj
-0 -227.8407 Td
-(1721 usegment\(void\)) 83.0018 Tj
-0 -237.334 Td
-(1722 {) 26.2111 Tj
-0 -246.8274 Td
-(1723   pushcli\(\);) 74.2647 Tj
-0 -256.3207 Td
-(1724   cpu->gdt[SEG_UCODE] = SEG\(STA_X|STA_R, proc->mem, proc-\
->sz-1, DPL_USER\);) 345.1126 Tj
-0 -265.8141 Td
-(1725   cpu->gdt[SEG_UDATA] = SEG\(STA_W, proc->mem, proc->sz-1,\
- DPL_USER\);) 318.9016 Tj
-0 -275.3075 Td
-(1726   cpu->gdt[SEG_TSS] = SEG16\(STS_T32A, &cpu->ts, sizeof\(c\
-pu->ts\)-1, 0\);) 327.6386 Tj
-0 -284.8008 Td
-(1727   cpu->gdt[SEG_TSS].s = 0;) 135.4239 Tj
-0 -294.2942 Td
-(1728   cpu->ts.ss0 = SEG_KDATA << 3;) 157.2665 Tj
-0 -303.7875 Td
-(1729   cpu->ts.esp0 = \(uint\)proc->kstack + KSTACKSIZE;) 235.8998 Tj
-0 -313.2809 Td
-(1730   ltr\(SEG_TSS << 3\);) 109.2129 Tj
-0 -322.7743 Td
-(1731   popcli\(\);) 69.8962 Tj
-0 -332.2676 Td
-(1732 }) 26.2111 Tj
-0 -341.761 Td
-(1733 ) 21.8426 Tj
-0 -351.2543 Td
-(1734 ) 21.8426 Tj
-0 -360.7477 Td
-(1735 ) 21.8426 Tj
-0 -370.2411 Td
-(1736 ) 21.8426 Tj
-0 -379.7344 Td
-(1737 ) 21.8426 Tj
-0 -389.2278 Td
-(1738 ) 21.8426 Tj
-0 -398.7211 Td
-(1739 ) 21.8426 Tj
-0 -408.2145 Td
-(1740 ) 21.8426 Tj
-0 -417.7079 Td
-(1741 ) 21.8426 Tj
-0 -427.2012 Td
-(1742 ) 21.8426 Tj
-0 -436.6946 Td
-(1743 ) 21.8426 Tj
-0 -446.1879 Td
-(1744 ) 21.8426 Tj
-0 -455.6813 Td
-(1745 ) 21.8426 Tj
-0 -465.1747 Td
-(1746 ) 21.8426 Tj
-0 -474.668 Td
-(1747 ) 21.8426 Tj
-0 -484.1614 Td
-(1748 ) 21.8426 Tj
-0 -493.6547 Td
-(1749 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 17) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/proc.c  Page 4) 161.635 Tj
-0 -28.4801 Td
-(1750 // Look in the process table for an UNUSED proc.) 231.5313 Tj
-0 -37.9735 Td
-(1751 // If found, change state to EMBRYO and return it.) 240.2683 Tj
-0 -47.4668 Td
-(1752 // Otherwise return 0.) 117.9499 Tj
-0 -56.9602 Td
-(1753 static struct proc*) 104.8443 Tj
-0 -66.4535 Td
-(1754 allocproc\(void\)) 87.3703 Tj
-0 -75.9469 Td
-(1755 {) 26.2111 Tj
-0 -85.4403 Td
-(1756   struct proc *p;) 96.1073 Tj
-0 -94.9336 Td
-(1757   char *sp;) 69.8962 Tj
-0 -104.427 Td
-(1758 ) 21.8426 Tj
-0 -113.9203 Td
-(1759   acquire\(&ptable.lock\);) 126.6869 Tj
-0 -123.4137 Td
-(1760   for\(p = ptable.proc; p < &ptable.proc[NPROC]; p++\)) 249.0053 Tj
-0 -132.9071 Td
-(1761     if\(p->state == UNUSED\)) 135.4239 Tj
-0 -142.4004 Td
-(1762       goto found;) 96.1073 Tj
-0 -151.8938 Td
-(1763   release\(&ptable.lock\);) 126.6869 Tj
-0 -161.3871 Td
-(1764   return 0;) 69.8962 Tj
-0 -170.8805 Td
-(1765 ) 21.8426 Tj
-0 -180.3739 Td
-(1766 found:) 48.0537 Tj
-0 -189.8672 Td
-(1767   p->state = EMBRYO;) 109.2129 Tj
-0 -199.3606 Td
-(1768   p->pid = nextpid++;) 113.5814 Tj
-0 -208.8539 Td
-(1769   release\(&ptable.lock\);) 126.6869 Tj
-0 -218.3473 Td
-(1770 ) 21.8426 Tj
-0 -227.8407 Td
-(1771   // Allocate kernel stack if necessary.) 196.5831 Tj
-0 -237.334 Td
-(1772   if\(\(p->kstack = kalloc\(KSTACKSIZE\)\) == 0\){) 214.0572 Tj
-0 -246.8274 Td
-(1773     p->state = UNUSED;) 117.9499 Tj
-0 -256.3207 Td
-(1774     return 0;) 78.6333 Tj
-0 -265.8141 Td
-(1775   }) 34.9481 Tj
-0 -275.3075 Td
-(1776   sp = p->kstack + KSTACKSIZE;) 152.898 Tj
-0 -284.8008 Td
-(1777 ) 21.8426 Tj
-0 -294.2942 Td
-(1778   // Leave room for trap frame.) 157.2665 Tj
-0 -303.7875 Td
-(1779   sp -= sizeof *p->tf;) 117.9499 Tj
-0 -313.2809 Td
-(1780   p->tf = \(struct trapframe*\)sp;) 161.635 Tj
-0 -322.7743 Td
-(1781 ) 21.8426 Tj
-0 -332.2676 Td
-(1782   // Set up new context to start executing at forkret,) 257.7424 Tj
-0 -341.761 Td
-(1783   // which returns to trapret \(see below\).) 205.3202 Tj
-0 -351.2543 Td
-(1784   sp -= 4;) 65.5277 Tj
-0 -360.7477 Td
-(1785   *\(uint*\)sp = \(uint\)trapret;) 148.5295 Tj
-0 -370.2411 Td
-(1786 ) 21.8426 Tj
-0 -379.7344 Td
-(1787   sp -= sizeof *p->context;) 139.7925 Tj
-0 -389.2278 Td
-(1788   p->context = \(struct context*\)sp;) 174.7406 Tj
-0 -398.7211 Td
-(1789   memset\(p->context, 0, sizeof *p->context\);) 214.0572 Tj
-0 -408.2145 Td
-(1790   p->context->eip = \(uint\)forkret;) 170.3721 Tj
-0 -417.7079 Td
-(1791   return p;) 69.8962 Tj
-0 -427.2012 Td
-(1792 }) 26.2111 Tj
-0 -436.6946 Td
-(1793 ) 21.8426 Tj
-0 -446.1879 Td
-(1794 ) 21.8426 Tj
-0 -455.6813 Td
-(1795 ) 21.8426 Tj
-0 -465.1747 Td
-(1796 ) 21.8426 Tj
-0 -474.668 Td
-(1797 ) 21.8426 Tj
-0 -484.1614 Td
-(1798 ) 21.8426 Tj
-0 -493.6547 Td
-(1799 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 17) 34.9481 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
-%%Page: 25 25
-%%BeginPageSetup
-%%PageOrientation: Landscape
-pdfStartPage
-180 rotate
--612 -792 translate
-0 0 612 792 re W
-%%EndPageSetup
-[] 0 d
-1 i
-0 j
-0 J
-10 M
-1 w
-/DeviceGray {} cs
-[0] sc
-/DeviceGray {} CS
-[0] SC
-false op
-false OP
-{} settransfer
-0 0 612 792 re
-W
-q
-q
-[0.1 0 0 0.1 0 0] cm
-q
-180 3960 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 738.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/proc.c  Page 5) 161.635 Tj
-0 -28.4801 Td
-(1800 // Set up first user process.) 148.5295 Tj
-0 -37.9735 Td
-(1801 void) 39.3166 Tj
-0 -47.4668 Td
-(1802 userinit\(void\)) 83.0018 Tj
-0 -56.9602 Td
-(1803 {) 26.2111 Tj
-0 -66.4535 Td
-(1804   struct proc *p;) 96.1073 Tj
-0 -75.9469 Td
-(1805   extern char _binary_initcode_start[], _binary_initcode_s\
-ize[];) 301.4275 Tj
-0 -85.4403 Td
-(1806 ) 21.8426 Tj
-0 -94.9336 Td
-(1807   p = allocproc\(\);) 100.4758 Tj
-0 -104.427 Td
-(1808   initproc = p;) 87.3703 Tj
-0 -113.9203 Td
-(1809 ) 21.8426 Tj
-0 -123.4137 Td
-(1810   // Initialize memory from initcode.S) 187.8461 Tj
-0 -132.9071 Td
-(1811   p->sz = PAGE;) 87.3703 Tj
-0 -142.4004 Td
-(1812   p->mem = kalloc\(p->sz\);) 131.0554 Tj
-0 -151.8938 Td
-(1813   memset\(p->mem, 0, p->sz\);) 139.7925 Tj
-0 -161.3871 Td
-(1814   memmove\(p->mem, _binary_initcode_start, \(int\)_binary_\
-initcode_size\);) 327.6386 Tj
-0 -170.8805 Td
-(1815 ) 21.8426 Tj
-0 -180.3739 Td
-(1816   memset\(p->tf, 0, sizeof\(*p->tf\)\);) 174.7406 Tj
-0 -189.8672 Td
-(1817   p->tf->cs = \(SEG_UCODE << 3\) | DPL_USER;) 205.3202 Tj
-0 -199.3606 Td
-(1818   p->tf->ds = \(SEG_UDATA << 3\) | DPL_USER;) 205.3202 Tj
-0 -208.8539 Td
-(1819   p->tf->es = p->tf->ds;) 126.6869 Tj
-0 -218.3473 Td
-(1820   p->tf->ss = p->tf->ds;) 126.6869 Tj
-0 -227.8407 Td
-(1821   p->tf->eflags = FL_IF;) 126.6869 Tj
-0 -237.334 Td
-(1822   p->tf->esp = p->sz;) 113.5814 Tj
-0 -246.8274 Td
-(1823   p->tf->eip = 0;  // beginning of initcode.S) 218.4257 Tj
-0 -256.3207 Td
-(1824 ) 21.8426 Tj
-0 -265.8141 Td
-(1825   safestrcpy\(p->name, "initcode", sizeof\(p->name\)\);) 244.6368 Tj
-0 -275.3075 Td
-(1826   p->cwd = namei\("/"\);) 117.9499 Tj
-0 -284.8008 Td
-(1827 ) 21.8426 Tj
-0 -294.2942 Td
-(1828   p->state = RUNNABLE;) 117.9499 Tj
-0 -303.7875 Td
-(1829 }) 26.2111 Tj
-0 -313.2809 Td
-(1830 ) 21.8426 Tj
-0 -322.7743 Td
-(1831 // Grow current process's memory by n bytes.) 214.0572 Tj
-0 -332.2676 Td
-(1832 // Return 0 on success, -1 on failure.) 187.8461 Tj
-0 -341.761 Td
-(1833 int) 34.9481 Tj
-0 -351.2543 Td
-(1834 growproc\(int n\)) 87.3703 Tj
-0 -360.7477 Td
-(1835 {) 26.2111 Tj
-0 -370.2411 Td
-(1836   char *newmem;) 87.3703 Tj
-0 -379.7344 Td
-(1837 ) 21.8426 Tj
-0 -389.2278 Td
-(1838   newmem = kalloc\(proc->sz + n\);) 161.635 Tj
-0 -398.7211 Td
-(1839   if\(newmem == 0\)) 96.1073 Tj
-0 -408.2145 Td
-(1840     return -1;) 83.0018 Tj
-0 -417.7079 Td
-(1841   memmove\(newmem, proc->mem, proc->sz\);) 192.2146 Tj
-0 -427.2012 Td
-(1842   memset\(newmem + proc->sz, 0, n\);) 170.3721 Tj
-0 -436.6946 Td
-(1843   kfree\(proc->mem, proc->sz\);) 148.5295 Tj
-0 -446.1879 Td
-(1844   proc->mem = newmem;) 113.5814 Tj
-0 -455.6813 Td
-(1845   proc->sz += n;) 91.7388 Tj
-0 -465.1747 Td
-(1846   usegment\(\);) 78.6333 Tj
-0 -474.668 Td
-(1847   return 0;) 69.8962 Tj
-0 -484.1614 Td
-(1848 }) 26.2111 Tj
-0 -493.6547 Td
-(1849 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 18) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/proc.c  Page 6) 161.635 Tj
-0 -28.4801 Td
-(1850 // Create a new process copying p as the parent.) 231.5313 Tj
-0 -37.9735 Td
-(1851 // Sets up stack to return as if from system call.) 240.2683 Tj
-0 -47.4668 Td
-(1852 // Caller must set state of returned proc to RUNNABLE.) 257.7424 Tj
-0 -56.9602 Td
-(1853 int) 34.9481 Tj
-0 -66.4535 Td
-(1854 fork\(void\)) 65.5277 Tj
-0 -75.9469 Td
-(1855 {) 26.2111 Tj
-0 -85.4403 Td
-(1856   int i, pid;) 78.6333 Tj
-0 -94.9336 Td
-(1857   struct proc *np;) 100.4758 Tj
-0 -104.427 Td
-(1858 ) 21.8426 Tj
-0 -113.9203 Td
-(1859   // Allocate process.) 117.9499 Tj
-0 -123.4137 Td
-(1860   if\(\(np = allocproc\(\)\) == 0\)) 148.5295 Tj
-0 -132.9071 Td
-(1861     return -1;) 83.0018 Tj
-0 -142.4004 Td
-(1862 ) 21.8426 Tj
-0 -151.8938 Td
-(1863   // Copy process state from p.) 157.2665 Tj
-0 -161.3871 Td
-(1864   np->sz = proc->sz;) 109.2129 Tj
-0 -170.8805 Td
-(1865   if\(\(np->mem = kalloc\(np->sz\)\) == 0\){) 187.8461 Tj
-0 -180.3739 Td
-(1866     kfree\(np->kstack, KSTACKSIZE\);) 170.3721 Tj
-0 -189.8672 Td
-(1867     np->kstack = 0;) 104.8443 Tj
-0 -199.3606 Td
-(1868     np->state = UNUSED;) 122.3184 Tj
-0 -208.8539 Td
-(1869     return -1;) 83.0018 Tj
-0 -218.3473 Td
-(1870   }) 34.9481 Tj
-0 -227.8407 Td
-(1871   memmove\(np->mem, proc->mem, np->sz\);) 187.8461 Tj
-0 -237.334 Td
-(1872   np->parent = proc;) 109.2129 Tj
-0 -246.8274 Td
-(1873   *np->tf = *proc->tf;) 117.9499 Tj
-0 -256.3207 Td
-(1874 ) 21.8426 Tj
-0 -265.8141 Td
-(1875   // Clear %eax so that fork returns 0 in the child.) 249.0053 Tj
-0 -275.3075 Td
-(1876   np->tf->eax = 0;) 100.4758 Tj
-0 -284.8008 Td
-(1877 ) 21.8426 Tj
-0 -294.2942 Td
-(1878   for\(i = 0; i < NOFILE; i++\)) 148.5295 Tj
-0 -303.7875 Td
-(1879     if\(proc->ofile[i]\)) 117.9499 Tj
-0 -313.2809 Td
-(1880       np->ofile[i] = filedup\(proc->ofile[i]\);) 218.4257 Tj
-0 -322.7743 Td
-(1881   np->cwd = idup\(proc->cwd\);) 144.161 Tj
-0 -332.2676 Td
-(1882 ) 21.8426 Tj
-0 -341.761 Td
-(1883   pid = np->pid;) 91.7388 Tj
-0 -351.2543 Td
-(1884   np->state = RUNNABLE;) 122.3184 Tj
-0 -360.7477 Td
-(1885 ) 21.8426 Tj
-0 -370.2411 Td
-(1886   return pid;) 78.6333 Tj
-0 -379.7344 Td
-(1887 }) 26.2111 Tj
-0 -389.2278 Td
-(1888 ) 21.8426 Tj
-0 -398.7211 Td
-(1889 ) 21.8426 Tj
-0 -408.2145 Td
-(1890 ) 21.8426 Tj
-0 -417.7079 Td
-(1891 ) 21.8426 Tj
-0 -427.2012 Td
-(1892 ) 21.8426 Tj
-0 -436.6946 Td
-(1893 ) 21.8426 Tj
-0 -446.1879 Td
-(1894 ) 21.8426 Tj
-0 -455.6813 Td
-(1895 ) 21.8426 Tj
-0 -465.1747 Td
-(1896 ) 21.8426 Tj
-0 -474.668 Td
-(1897 ) 21.8426 Tj
-0 -484.1614 Td
-(1898 ) 21.8426 Tj
-0 -493.6547 Td
-(1899 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 18) 34.9481 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
-%%Page: 26 26
-%%BeginPageSetup
-%%PageOrientation: Landscape
-pdfStartPage
-180 rotate
--612 -792 translate
-0 0 612 792 re W
-%%EndPageSetup
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-(Sep  3 00:44 2009  xv6/proc.c  Page 7) 161.635 Tj
-0 -28.4801 Td
-(1900 // Per-CPU process scheduler.) 148.5295 Tj
-0 -37.9735 Td
-(1901 // Each CPU calls scheduler\(\) after setting itself up.) 257.7424 Tj
-0 -47.4668 Td
-(1902 // Scheduler never returns.  It loops, doing:) 218.4257 Tj
-0 -56.9602 Td
-(1903 //  - choose a process to run) 148.5295 Tj
-0 -66.4535 Td
-(1904 //  - swtch to start running that process) 200.9517 Tj
-0 -75.9469 Td
-(1905 //  - eventually that process transfers control) 227.1628 Tj
-0 -85.4403 Td
-(1906 //      via swtch back to the scheduler.) 196.5831 Tj
-0 -94.9336 Td
-(1907 void) 39.3166 Tj
-0 -104.427 Td
-(1908 scheduler\(void\)) 87.3703 Tj
-0 -113.9203 Td
-(1909 {) 26.2111 Tj
-0 -123.4137 Td
-(1910   struct proc *p;) 96.1073 Tj
-0 -132.9071 Td
-(1911 ) 21.8426 Tj
-0 -142.4004 Td
-(1912   for\(;;\){) 65.5277 Tj
-0 -151.8938 Td
-(1913     // Enable interrupts on this processor.) 209.6887 Tj
-0 -161.3871 Td
-(1914     sti\(\);) 65.5277 Tj
-0 -170.8805 Td
-(1915 ) 21.8426 Tj
-0 -180.3739 Td
-(1916     // Loop over process table looking for process to run.) 275.2164 Tj
-0 -189.8672 Td
-(1917     acquire\(&ptable.lock\);) 135.4239 Tj
-0 -199.3606 Td
-(1918     for\(p = ptable.proc; p < &ptable.proc[NPROC]; p++\){) 262.1109 Tj
-0 -208.8539 Td
-(1919       if\(p->state != RUNNABLE\)) 152.898 Tj
-0 -218.3473 Td
-(1920         continue;) 96.1073 Tj
-0 -227.8407 Td
-(1921 ) 21.8426 Tj
-0 -237.334 Td
-(1922       // Switch to chosen process.  It is the process's jo\
-b) 279.5849 Tj
-0 -246.8274 Td
-(1923       // to release ptable.lock and then reacquire it) 253.3738 Tj
-0 -256.3207 Td
-(1924       // before jumping back to us.) 174.7406 Tj
-0 -265.8141 Td
-(1925       proc = p;) 87.3703 Tj
-0 -275.3075 Td
-(1926       usegment\(\);) 96.1073 Tj
-0 -284.8008 Td
-(1927       p->state = RUNNING;) 131.0554 Tj
-0 -294.2942 Td
-(1928       swtch\(&cpu->scheduler, proc->context\);) 214.0572 Tj
-0 -303.7875 Td
-(1929 ) 21.8426 Tj
-0 -313.2809 Td
-(1930       // Process is done running for now.) 200.9517 Tj
-0 -322.7743 Td
-(1931       // It should have changed its p->state before coming\
- back.) 301.4275 Tj
-0 -332.2676 Td
-(1932       proc = 0;) 87.3703 Tj
-0 -341.761 Td
-(1933     }) 43.6851 Tj
-0 -351.2543 Td
-(1934     release\(&ptable.lock\);) 135.4239 Tj
-0 -360.7477 Td
-(1935 ) 21.8426 Tj
-0 -370.2411 Td
-(1936   }) 34.9481 Tj
-0 -379.7344 Td
-(1937 }) 26.2111 Tj
-0 -389.2278 Td
-(1938 ) 21.8426 Tj
-0 -398.7211 Td
-(1939 ) 21.8426 Tj
-0 -408.2145 Td
-(1940 ) 21.8426 Tj
-0 -417.7079 Td
-(1941 ) 21.8426 Tj
-0 -427.2012 Td
-(1942 ) 21.8426 Tj
-0 -436.6946 Td
-(1943 ) 21.8426 Tj
-0 -446.1879 Td
-(1944 ) 21.8426 Tj
-0 -455.6813 Td
-(1945 ) 21.8426 Tj
-0 -465.1747 Td
-(1946 ) 21.8426 Tj
-0 -474.668 Td
-(1947 ) 21.8426 Tj
-0 -484.1614 Td
-(1948 ) 21.8426 Tj
-0 -493.6547 Td
-(1949 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 19) 34.9481 Tj
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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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-[1 0 0 1 0 0] Tm
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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
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-(Sheet 20) 34.9481 Tj
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-(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
-0 -522.1348 Td
-(Sheet 21) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/proc.c  Page 12) 166.0035 Tj
-0 -28.4801 Td
-(2150 // Wait for a child process to exit and return its pid.) 262.1109 Tj
-0 -37.9735 Td
-(2151 // Return -1 if this process has no children.) 218.4257 Tj
-0 -47.4668 Td
-(2152 int) 34.9481 Tj
-0 -56.9602 Td
-(2153 wait\(void\)) 65.5277 Tj
-0 -66.4535 Td
-(2154 {) 26.2111 Tj
-0 -75.9469 Td
-(2155   struct proc *p;) 96.1073 Tj
-0 -85.4403 Td
-(2156   int havekids, pid;) 109.2129 Tj
-0 -94.9336 Td
-(2157 ) 21.8426 Tj
-0 -104.427 Td
-(2158   acquire\(&ptable.lock\);) 126.6869 Tj
-0 -113.9203 Td
-(2159   for\(;;\){) 65.5277 Tj
-0 -123.4137 Td
-(2160     // Scan through table looking for zombie children.) 257.7424 Tj
-0 -132.9071 Td
-(2161     havekids = 0;) 96.1073 Tj
-0 -142.4004 Td
-(2162     for\(p = ptable.proc; p < &ptable.proc[NPROC]; p++\){) 262.1109 Tj
-0 -151.8938 Td
-(2163       if\(p->parent != proc\)) 139.7925 Tj
-0 -161.3871 Td
-(2164         continue;) 96.1073 Tj
-0 -170.8805 Td
-(2165       havekids = 1;) 104.8443 Tj
-0 -180.3739 Td
-(2166       if\(p->state == ZOMBIE\){) 148.5295 Tj
-0 -189.8672 Td
-(2167         // Found one.) 113.5814 Tj
-0 -199.3606 Td
-(2168         pid = p->pid;) 113.5814 Tj
-0 -208.8539 Td
-(2169         kfree\(p->mem, p->sz\);) 148.5295 Tj
-0 -218.3473 Td
-(2170         kfree\(p->kstack, KSTACKSIZE\);) 183.4776 Tj
-0 -227.8407 Td
-(2171         p->state = UNUSED;) 135.4239 Tj
-0 -237.334 Td
-(2172         p->pid = 0;) 104.8443 Tj
-0 -246.8274 Td
-(2173         p->parent = 0;) 117.9499 Tj
-0 -256.3207 Td
-(2174         p->name[0] = 0;) 122.3184 Tj
-0 -265.8141 Td
-(2175         p->killed = 0;) 117.9499 Tj
-0 -275.3075 Td
-(2176         release\(&ptable.lock\);) 152.898 Tj
-0 -284.8008 Td
-(2177         return pid;) 104.8443 Tj
-0 -294.2942 Td
-(2178       }) 52.4222 Tj
-0 -303.7875 Td
-(2179     }) 43.6851 Tj
-0 -313.2809 Td
-(2180 ) 21.8426 Tj
-0 -322.7743 Td
-(2181     // No point waiting if we don't have any children.) 257.7424 Tj
-0 -332.2676 Td
-(2182     if\(!havekids || proc->killed\){) 170.3721 Tj
-0 -341.761 Td
-(2183       release\(&ptable.lock\);) 144.161 Tj
-0 -351.2543 Td
-(2184       return -1;) 91.7388 Tj
-0 -360.7477 Td
-(2185     }) 43.6851 Tj
-0 -370.2411 Td
-(2186 ) 21.8426 Tj
-0 -379.7344 Td
-(2187     // Wait for children to exit.  \(See wakeup1 call in p\
-roc_exit.\)) 314.533 Tj
-0 -389.2278 Td
-(2188     sleep\(proc, &ptable.lock\);  ) 161.635 Tj
-0 -398.7211 Td
-(2189   }) 34.9481 Tj
-0 -408.2145 Td
-(2190 }) 26.2111 Tj
-0 -417.7079 Td
-(2191 ) 21.8426 Tj
-0 -427.2012 Td
-(2192 ) 21.8426 Tj
-0 -436.6946 Td
-(2193 ) 21.8426 Tj
-0 -446.1879 Td
-(2194 ) 21.8426 Tj
-0 -455.6813 Td
-(2195 ) 21.8426 Tj
-0 -465.1747 Td
-(2196 ) 21.8426 Tj
-0 -474.668 Td
-(2197 ) 21.8426 Tj
-0 -484.1614 Td
-(2198 ) 21.8426 Tj
-0 -493.6547 Td
-(2199 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 21) 34.9481 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
-%%Page: 29 29
-%%BeginPageSetup
-%%PageOrientation: Landscape
-pdfStartPage
-180 rotate
--612 -792 translate
-0 0 612 792 re W
-%%EndPageSetup
-[] 0 d
-1 i
-0 j
-0 J
-10 M
-1 w
-/DeviceGray {} cs
-[0] sc
-/DeviceGray {} CS
-[0] SC
-false op
-false OP
-{} settransfer
-0 0 612 792 re
-W
-q
-q
-[0.1 0 0 0.1 0 0] cm
-q
-180 3960 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 738.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/swtch.S  Page 1) 166.0035 Tj
-0 -28.4801 Td
-(2200 # Context switch) 91.7388 Tj
-0 -37.9735 Td
-(2201 #) 26.2111 Tj
-0 -47.4668 Td
-(2202 #   void swtch\(struct context **old, struct context *new\)\
-;) 275.2164 Tj
-0 -56.9602 Td
-(2203 #) 26.2111 Tj
-0 -66.4535 Td
-(2204 # Save current register context in old) 187.8461 Tj
-0 -75.9469 Td
-(2205 # and then load register context from new.) 205.3202 Tj
-0 -85.4403 Td
-(2206 ) 21.8426 Tj
-0 -94.9336 Td
-(2207 .globl swtch) 74.2647 Tj
-0 -104.427 Td
-(2208 swtch:) 48.0537 Tj
-0 -113.9203 Td
-(2209   movl 4\(%esp\), %eax) 109.2129 Tj
-0 -123.4137 Td
-(2210   movl 8\(%esp\), %edx) 109.2129 Tj
-0 -132.9071 Td
-(2211 ) 21.8426 Tj
-0 -142.4004 Td
-(2212   # Save old callee-save registers) 170.3721 Tj
-0 -151.8938 Td
-(2213   pushl %ebp) 74.2647 Tj
-0 -161.3871 Td
-(2214   pushl %ebx) 74.2647 Tj
-0 -170.8805 Td
-(2215   pushl %esi) 74.2647 Tj
-0 -180.3739 Td
-(2216   pushl %edi) 74.2647 Tj
-0 -189.8672 Td
-(2217 ) 21.8426 Tj
-0 -199.3606 Td
-(2218   # Switch stacks) 96.1073 Tj
-0 -208.8539 Td
-(2219   movl %esp, \(%eax\)) 104.8443 Tj
-0 -218.3473 Td
-(2220   movl %edx, %esp) 96.1073 Tj
-0 -227.8407 Td
-(2221 ) 21.8426 Tj
-0 -237.334 Td
-(2222   # Load new callee-save registers) 170.3721 Tj
-0 -246.8274 Td
-(2223   popl %edi) 69.8962 Tj
-0 -256.3207 Td
-(2224   popl %esi) 69.8962 Tj
-0 -265.8141 Td
-(2225   popl %ebx) 69.8962 Tj
-0 -275.3075 Td
-(2226   popl %ebp) 69.8962 Tj
-0 -284.8008 Td
-(2227   ret) 43.6851 Tj
-0 -294.2942 Td
-(2228 ) 21.8426 Tj
-0 -303.7875 Td
-(2229 ) 21.8426 Tj
-0 -313.2809 Td
-(2230 ) 21.8426 Tj
-0 -322.7743 Td
-(2231 ) 21.8426 Tj
-0 -332.2676 Td
-(2232 ) 21.8426 Tj
-0 -341.761 Td
-(2233 ) 21.8426 Tj
-0 -351.2543 Td
-(2234 ) 21.8426 Tj
-0 -360.7477 Td
-(2235 ) 21.8426 Tj
-0 -370.2411 Td
-(2236 ) 21.8426 Tj
-0 -379.7344 Td
-(2237 ) 21.8426 Tj
-0 -389.2278 Td
-(2238 ) 21.8426 Tj
-0 -398.7211 Td
-(2239 ) 21.8426 Tj
-0 -408.2145 Td
-(2240 ) 21.8426 Tj
-0 -417.7079 Td
-(2241 ) 21.8426 Tj
-0 -427.2012 Td
-(2242 ) 21.8426 Tj
-0 -436.6946 Td
-(2243 ) 21.8426 Tj
-0 -446.1879 Td
-(2244 ) 21.8426 Tj
-0 -455.6813 Td
-(2245 ) 21.8426 Tj
-0 -465.1747 Td
-(2246 ) 21.8426 Tj
-0 -474.668 Td
-(2247 ) 21.8426 Tj
-0 -484.1614 Td
-(2248 ) 21.8426 Tj
-0 -493.6547 Td
-(2249 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 22) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/kalloc.c  Page 1) 170.3721 Tj
-0 -28.4801 Td
-(2250 // Physical memory allocator, intended to allocate) 240.2683 Tj
-0 -37.9735 Td
-(2251 // memory for user processes. Allocates in 4096-byte "page\
-s".) 288.322 Tj
-0 -47.4668 Td
-(2252 // Free list is kept sorted and combines adjacent pages in\
-to) 283.9534 Tj
-0 -56.9602 Td
-(2253 // long runs, to make it easier to allocate big segments.) 270.8479 Tj
-0 -66.4535 Td
-(2254 // One reason the page size is 4k is that the x86 segment \
-size) 292.6905 Tj
-0 -75.9469 Td
-(2255 // granularity is 4k.) 113.5814 Tj
-0 -85.4403 Td
-(2256 ) 21.8426 Tj
-0 -94.9336 Td
-(2257 #include "types.h") 100.4758 Tj
-0 -104.427 Td
-(2258 #include "defs.h") 96.1073 Tj
-0 -113.9203 Td
-(2259 #include "param.h") 100.4758 Tj
-0 -123.4137 Td
-(2260 #include "spinlock.h") 113.5814 Tj
-0 -132.9071 Td
-(2261 ) 21.8426 Tj
-0 -142.4004 Td
-(2262 struct run {) 74.2647 Tj
-0 -151.8938 Td
-(2263   struct run *next;) 104.8443 Tj
-0 -161.3871 Td
-(2264   int len; // bytes) 104.8443 Tj
-0 -170.8805 Td
-(2265 };) 30.5796 Tj
-0 -180.3739 Td
-(2266 ) 21.8426 Tj
-0 -189.8672 Td
-(2267 struct {) 56.7907 Tj
-0 -199.3606 Td
-(2268   struct spinlock lock;) 122.3184 Tj
-0 -208.8539 Td
-(2269   struct run *freelist;) 122.3184 Tj
-0 -218.3473 Td
-(2270 } kmem;) 52.4222 Tj
-0 -227.8407 Td
-(2271 ) 21.8426 Tj
-0 -237.334 Td
-(2272 // Initialize free list of physical pages.) 205.3202 Tj
-0 -246.8274 Td
-(2273 // This code cheats by just considering one megabyte of) 262.1109 Tj
-0 -256.3207 Td
-(2274 // pages after end.  Real systems would determine the) 253.3738 Tj
-0 -265.8141 Td
-(2275 // amount of memory available in the system and use it all\
-.) 279.5849 Tj
-0 -275.3075 Td
-(2276 void) 39.3166 Tj
-0 -284.8008 Td
-(2277 kinit\(void\)) 69.8962 Tj
-0 -294.2942 Td
-(2278 {) 26.2111 Tj
-0 -303.7875 Td
-(2279   extern char end[];) 109.2129 Tj
-0 -313.2809 Td
-(2280   uint len;) 69.8962 Tj
-0 -322.7743 Td
-(2281   char *p;) 65.5277 Tj
-0 -332.2676 Td
-(2282 ) 21.8426 Tj
-0 -341.761 Td
-(2283   initlock\(&kmem.lock, "kmem"\);) 157.2665 Tj
-0 -351.2543 Td
-(2284   p = \(char*\)\(\(\(uint\)end + PAGE\) & ~\(PAGE-1\)\);) 222.7942 Tj
-0 -360.7477 Td
-(2285   len = 256*PAGE; // assume computer has 256 pages of RAM,\
- 1 MB) 297.059 Tj
-0 -370.2411 Td
-(2286   cprintf\("mem = %d\\n", len\);) 148.5295 Tj
-0 -379.7344 Td
-(2287   kfree\(p, len\);) 91.7388 Tj
-0 -389.2278 Td
-(2288 }) 26.2111 Tj
-0 -398.7211 Td
-(2289 ) 21.8426 Tj
-0 -408.2145 Td
-(2290 ) 21.8426 Tj
-0 -417.7079 Td
-(2291 ) 21.8426 Tj
-0 -427.2012 Td
-(2292 ) 21.8426 Tj
-0 -436.6946 Td
-(2293 ) 21.8426 Tj
-0 -446.1879 Td
-(2294 ) 21.8426 Tj
-0 -455.6813 Td
-(2295 ) 21.8426 Tj
-0 -465.1747 Td
-(2296 ) 21.8426 Tj
-0 -474.668 Td
-(2297 ) 21.8426 Tj
-0 -484.1614 Td
-(2298 ) 21.8426 Tj
-0 -493.6547 Td
-(2299 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 22) 34.9481 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
-%%Page: 30 30
-%%BeginPageSetup
-%%PageOrientation: Landscape
-pdfStartPage
-180 rotate
--612 -792 translate
-0 0 612 792 re W
-%%EndPageSetup
-[] 0 d
-1 i
-0 j
-0 J
-10 M
-1 w
-/DeviceGray {} cs
-[0] sc
-/DeviceGray {} CS
-[0] SC
-false op
-false OP
-{} settransfer
-0 0 612 792 re
-W
-q
-q
-[0.1 0 0 0.1 0 0] cm
-q
-180 3960 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 738.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/kalloc.c  Page 2) 170.3721 Tj
-0 -28.4801 Td
-(2300 // Free the len bytes of memory pointed at by v,) 231.5313 Tj
-0 -37.9735 Td
-(2301 // which normally should have been returned by a) 231.5313 Tj
-0 -47.4668 Td
-(2302 // call to kalloc\(len\).  \(The exception is when) 227.1628 Tj
-0 -56.9602 Td
-(2303 // initializing the allocator; see kinit above.\)) 231.5313 Tj
-0 -66.4535 Td
-(2304 void) 39.3166 Tj
-0 -75.9469 Td
-(2305 kfree\(char *v, int len\)) 122.3184 Tj
-0 -85.4403 Td
-(2306 {) 26.2111 Tj
-0 -94.9336 Td
-(2307   struct run *r, *rend, **rp, *p, *pend;) 196.5831 Tj
-0 -104.427 Td
-(2308 ) 21.8426 Tj
-0 -113.9203 Td
-(2309   if\(len <= 0 || len % PAGE\)) 144.161 Tj
-0 -123.4137 Td
-(2310     panic\("kfree"\);) 104.8443 Tj
-0 -132.9071 Td
-(2311 ) 21.8426 Tj
-0 -142.4004 Td
-(2312   // Fill with junk to catch dangling refs.) 209.6887 Tj
-0 -151.8938 Td
-(2313   memset\(v, 1, len\);) 109.2129 Tj
-0 -161.3871 Td
-(2314 ) 21.8426 Tj
-0 -170.8805 Td
-(2315   acquire\(&kmem.lock\);) 117.9499 Tj
-0 -180.3739 Td
-(2316   p = \(struct run*\)v;) 113.5814 Tj
-0 -189.8672 Td
-(2317   pend = \(struct run*\)\(v + len\);) 161.635 Tj
-0 -199.3606 Td
-(2318   for\(rp=&kmem.freelist; \(r=*rp\) != 0 && r <= pend; rp=\
-&r->next\){) 305.796 Tj
-0 -208.8539 Td
-(2319     rend = \(struct run*\)\(\(char*\)r + r->len\);) 214.0572 Tj
-0 -218.3473 Td
-(2320     if\(r <= p && p < rend\)) 135.4239 Tj
-0 -227.8407 Td
-(2321       panic\("freeing free page"\);) 166.0035 Tj
-0 -237.334 Td
-(2322     if\(rend == p\){  // r before p: expand r to include p) 266.4794 Tj
-0 -246.8274 Td
-(2323       r->len += len;) 109.2129 Tj
-0 -256.3207 Td
-(2324       if\(r->next && r->next == pend\){  // r now next to \
-r->next?) 301.4275 Tj
-0 -265.8141 Td
-(2325         r->len += r->next->len;) 157.2665 Tj
-0 -275.3075 Td
-(2326         r->next = r->next->next;) 161.635 Tj
-0 -284.8008 Td
-(2327       }) 52.4222 Tj
-0 -294.2942 Td
-(2328       goto out;) 87.3703 Tj
-0 -303.7875 Td
-(2329     }) 43.6851 Tj
-0 -313.2809 Td
-(2330     if\(pend == r\){  // p before r: expand p to include, \
-replace r) 305.796 Tj
-0 -322.7743 Td
-(2331       p->len = len + r->len;) 144.161 Tj
-0 -332.2676 Td
-(2332       p->next = r->next;) 126.6869 Tj
-0 -341.761 Td
-(2333       *rp = p;) 83.0018 Tj
-0 -351.2543 Td
-(2334       goto out;) 87.3703 Tj
-0 -360.7477 Td
-(2335     }) 43.6851 Tj
-0 -370.2411 Td
-(2336   }) 34.9481 Tj
-0 -379.7344 Td
-(2337   // Insert p before r in list.) 157.2665 Tj
-0 -389.2278 Td
-(2338   p->len = len;) 87.3703 Tj
-0 -398.7211 Td
-(2339   p->next = r;) 83.0018 Tj
-0 -408.2145 Td
-(2340   *rp = p;) 65.5277 Tj
-0 -417.7079 Td
-(2341 ) 21.8426 Tj
-0 -427.2012 Td
-(2342  out:) 43.6851 Tj
-0 -436.6946 Td
-(2343   release\(&kmem.lock\);) 117.9499 Tj
-0 -446.1879 Td
-(2344 }) 26.2111 Tj
-0 -455.6813 Td
-(2345 ) 21.8426 Tj
-0 -465.1747 Td
-(2346 ) 21.8426 Tj
-0 -474.668 Td
-(2347 ) 21.8426 Tj
-0 -484.1614 Td
-(2348 ) 21.8426 Tj
-0 -493.6547 Td
-(2349 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 23) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/kalloc.c  Page 3) 170.3721 Tj
-0 -28.4801 Td
-(2350 // Allocate n bytes of physical memory.) 192.2146 Tj
-0 -37.9735 Td
-(2351 // Returns a kernel-segment pointer.) 179.1091 Tj
-0 -47.4668 Td
-(2352 // Returns 0 if the memory cannot be allocated.) 227.1628 Tj
-0 -56.9602 Td
-(2353 char*) 43.6851 Tj
-0 -66.4535 Td
-(2354 kalloc\(int n\)) 78.6333 Tj
-0 -75.9469 Td
-(2355 {) 26.2111 Tj
-0 -85.4403 Td
-(2356   char *p;) 65.5277 Tj
-0 -94.9336 Td
-(2357   struct run *r, **rp;) 117.9499 Tj
-0 -104.427 Td
-(2358 ) 21.8426 Tj
-0 -113.9203 Td
-(2359   if\(n % PAGE || n <= 0\)) 126.6869 Tj
-0 -123.4137 Td
-(2360     panic\("kalloc"\);) 109.2129 Tj
-0 -132.9071 Td
-(2361 ) 21.8426 Tj
-0 -142.4004 Td
-(2362   acquire\(&kmem.lock\);) 117.9499 Tj
-0 -151.8938 Td
-(2363   for\(rp=&kmem.freelist; \(r=*rp\) != 0; rp=&r->next\){) 249.0053 Tj
-0 -161.3871 Td
-(2364     if\(r->len >= n\){) 109.2129 Tj
-0 -170.8805 Td
-(2365       r->len -= n;) 100.4758 Tj
-0 -180.3739 Td
-(2366       p = \(char*\)r + r->len;) 144.161 Tj
-0 -189.8672 Td
-(2367       if\(r->len == 0\)) 113.5814 Tj
-0 -199.3606 Td
-(2368         *rp = r->next;) 117.9499 Tj
-0 -208.8539 Td
-(2369       release\(&kmem.lock\);) 135.4239 Tj
-0 -218.3473 Td
-(2370       return p;) 87.3703 Tj
-0 -227.8407 Td
-(2371     }) 43.6851 Tj
-0 -237.334 Td
-(2372   }) 34.9481 Tj
-0 -246.8274 Td
-(2373   release\(&kmem.lock\);) 117.9499 Tj
-0 -256.3207 Td
-(2374 ) 21.8426 Tj
-0 -265.8141 Td
-(2375   cprintf\("kalloc: out of memory\\n"\);) 183.4776 Tj
-0 -275.3075 Td
-(2376   return 0;) 69.8962 Tj
-0 -284.8008 Td
-(2377 }) 26.2111 Tj
-0 -294.2942 Td
-(2378 ) 21.8426 Tj
-0 -303.7875 Td
-(2379 ) 21.8426 Tj
-0 -313.2809 Td
-(2380 ) 21.8426 Tj
-0 -322.7743 Td
-(2381 ) 21.8426 Tj
-0 -332.2676 Td
-(2382 ) 21.8426 Tj
-0 -341.761 Td
-(2383 ) 21.8426 Tj
-0 -351.2543 Td
-(2384 ) 21.8426 Tj
-0 -360.7477 Td
-(2385 ) 21.8426 Tj
-0 -370.2411 Td
-(2386 ) 21.8426 Tj
-0 -379.7344 Td
-(2387 ) 21.8426 Tj
-0 -389.2278 Td
-(2388 ) 21.8426 Tj
-0 -398.7211 Td
-(2389 ) 21.8426 Tj
-0 -408.2145 Td
-(2390 ) 21.8426 Tj
-0 -417.7079 Td
-(2391 ) 21.8426 Tj
-0 -427.2012 Td
-(2392 ) 21.8426 Tj
-0 -436.6946 Td
-(2393 ) 21.8426 Tj
-0 -446.1879 Td
-(2394 ) 21.8426 Tj
-0 -455.6813 Td
-(2395 ) 21.8426 Tj
-0 -465.1747 Td
-(2396 ) 21.8426 Tj
-0 -474.668 Td
-(2397 ) 21.8426 Tj
-0 -484.1614 Td
-(2398 ) 21.8426 Tj
-0 -493.6547 Td
-(2399 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 23) 34.9481 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
-%%Page: 31 31
-%%BeginPageSetup
-%%PageOrientation: Landscape
-pdfStartPage
-180 rotate
--612 -792 translate
-0 0 612 792 re W
-%%EndPageSetup
-[] 0 d
-1 i
-0 j
-0 J
-10 M
-1 w
-/DeviceGray {} cs
-[0] sc
-/DeviceGray {} CS
-[0] SC
-false op
-false OP
-{} settransfer
-0 0 612 792 re
-W
-q
-q
-[0.1 0 0 0.1 0 0] cm
-q
-180 3960 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 738.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/traps.h  Page 1) 166.0035 Tj
-0 -28.4801 Td
-(2400 // x86 trap and interrupt constants.) 179.1091 Tj
-0 -37.9735 Td
-(2401 ) 21.8426 Tj
-0 -47.4668 Td
-(2402 // Processor-defined:) 113.5814 Tj
-0 -56.9602 Td
-(2403 #define T_DIVIDE         0      // divide error) 227.1628 Tj
-0 -66.4535 Td
-(2404 #define T_DEBUG          1      // debug exception) 240.2683 Tj
-0 -75.9469 Td
-(2405 #define T_NMI            2      // non-maskable interrupt) 270.8479 Tj
-0 -85.4403 Td
-(2406 #define T_BRKPT          3      // breakpoint) 218.4257 Tj
-0 -94.9336 Td
-(2407 #define T_OFLOW          4      // overflow) 209.6887 Tj
-0 -104.427 Td
-(2408 #define T_BOUND          5      // bounds check) 227.1628 Tj
-0 -113.9203 Td
-(2409 #define T_ILLOP          6      // illegal opcode) 235.8998 Tj
-0 -123.4137 Td
-(2410 #define T_DEVICE         7      // device not available) 262.1109 Tj
-0 -132.9071 Td
-(2411 #define T_DBLFLT         8      // double fault) 227.1628 Tj
-0 -142.4004 Td
-(2412 // #define T_COPROC      9      // reserved \(not used sin\
-ce 486\)) 301.4275 Tj
-0 -151.8938 Td
-(2413 #define T_TSS           10      // invalid task switch seg\
-ment) 292.6905 Tj
-0 -161.3871 Td
-(2414 #define T_SEGNP         11      // segment not present) 257.7424 Tj
-0 -170.8805 Td
-(2415 #define T_STACK         12      // stack exception) 240.2683 Tj
-0 -180.3739 Td
-(2416 #define T_GPFLT         13      // general protection faul\
-t) 279.5849 Tj
-0 -189.8672 Td
-(2417 #define T_PGFLT         14      // page fault) 218.4257 Tj
-0 -199.3606 Td
-(2418 // #define T_RES        15      // reserved) 209.6887 Tj
-0 -208.8539 Td
-(2419 #define T_FPERR         16      // floating point error) 262.1109 Tj
-0 -218.3473 Td
-(2420 #define T_ALIGN         17      // aligment check) 235.8998 Tj
-0 -227.8407 Td
-(2421 #define T_MCHK          18      // machine check) 231.5313 Tj
-0 -237.334 Td
-(2422 #define T_SIMDERR       19      // SIMD floating point err\
-or) 283.9534 Tj
-0 -246.8274 Td
-(2423 ) 21.8426 Tj
-0 -256.3207 Td
-(2424 // These are arbitrarily chosen, but with care not to over\
-lap) 288.322 Tj
-0 -265.8141 Td
-(2425 // processor defined exceptions or interrupt vectors.) 253.3738 Tj
-0 -275.3075 Td
-(2426 #define T_SYSCALL       64     // system call) 218.4257 Tj
-0 -284.8008 Td
-(2427 #define T_DEFAULT      500      // catchall) 209.6887 Tj
-0 -294.2942 Td
-(2428 ) 21.8426 Tj
-0 -303.7875 Td
-(2429 #define T_IRQ0          32      // IRQ 0 corresponds to in\
-t T_IRQ) 305.796 Tj
-0 -313.2809 Td
-(2430 ) 21.8426 Tj
-0 -322.7743 Td
-(2431 #define IRQ_TIMER        0) 135.4239 Tj
-0 -332.2676 Td
-(2432 #define IRQ_KBD          1) 135.4239 Tj
-0 -341.761 Td
-(2433 #define IRQ_COM1         4) 135.4239 Tj
-0 -351.2543 Td
-(2434 #define IRQ_IDE         14) 135.4239 Tj
-0 -360.7477 Td
-(2435 #define IRQ_ERROR       19) 135.4239 Tj
-0 -370.2411 Td
-(2436 #define IRQ_SPURIOUS    31) 135.4239 Tj
-0 -379.7344 Td
-(2437 ) 21.8426 Tj
-0 -389.2278 Td
-(2438 ) 21.8426 Tj
-0 -398.7211 Td
-(2439 ) 21.8426 Tj
-0 -408.2145 Td
-(2440 ) 21.8426 Tj
-0 -417.7079 Td
-(2441 ) 21.8426 Tj
-0 -427.2012 Td
-(2442 ) 21.8426 Tj
-0 -436.6946 Td
-(2443 ) 21.8426 Tj
-0 -446.1879 Td
-(2444 ) 21.8426 Tj
-0 -455.6813 Td
-(2445 ) 21.8426 Tj
-0 -465.1747 Td
-(2446 ) 21.8426 Tj
-0 -474.668 Td
-(2447 ) 21.8426 Tj
-0 -484.1614 Td
-(2448 ) 21.8426 Tj
-0 -493.6547 Td
-(2449 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 24) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/vectors.pl  Page 1) 179.1091 Tj
-0 -28.4801 Td
-(2450 #!/usr/bin/perl -w) 100.4758 Tj
-0 -37.9735 Td
-(2451 ) 21.8426 Tj
-0 -47.4668 Td
-(2452 # Generate vectors.S, the trap/interrupt entry points.) 257.7424 Tj
-0 -56.9602 Td
-(2453 # There has to be one entry point per interrupt number) 257.7424 Tj
-0 -66.4535 Td
-(2454 # since otherwise there's no way for trap\(\) to discover) 262.1109 Tj
-0 -75.9469 Td
-(2455 # the interrupt number.) 122.3184 Tj
-0 -85.4403 Td
-(2456 ) 21.8426 Tj
-0 -94.9336 Td
-(2457 print "# generated by vectors.pl - do not edit\\n";) 240.2683 Tj
-0 -104.427 Td
-(2458 print "# handlers\\n";) 113.5814 Tj
-0 -113.9203 Td
-(2459 print ".globl alltraps\\n";) 135.4239 Tj
-0 -123.4137 Td
-(2460 for\(my $i = 0; $i < 256; $i++\){) 157.2665 Tj
-0 -132.9071 Td
-(2461     print ".globl vector$i\\n";) 152.898 Tj
-0 -142.4004 Td
-(2462     print "vector$i:\\n";) 126.6869 Tj
-0 -151.8938 Td
-(2463     if\(!\($i == 8 || \($i >= 10 && $i <= 14\) || $i == 17\
-\)\){) 270.8479 Tj
-0 -161.3871 Td
-(2464         print "  pushl \\$0\\n";) 152.898 Tj
-0 -170.8805 Td
-(2465     }) 43.6851 Tj
-0 -180.3739 Td
-(2466     print "  pushl \\$$i\\n";) 139.7925 Tj
-0 -189.8672 Td
-(2467     print "  jmp alltraps\\n";) 148.5295 Tj
-0 -199.3606 Td
-(2468 }) 26.2111 Tj
-0 -208.8539 Td
-(2469 ) 21.8426 Tj
-0 -218.3473 Td
-(2470 print "\\n# vector table\\n";) 139.7925 Tj
-0 -227.8407 Td
-(2471 print ".data\\n";) 91.7388 Tj
-0 -237.334 Td
-(2472 print ".globl vectors\\n";) 131.0554 Tj
-0 -246.8274 Td
-(2473 print "vectors:\\n";) 104.8443 Tj
-0 -256.3207 Td
-(2474 for\(my $i = 0; $i < 256; $i++\){) 157.2665 Tj
-0 -265.8141 Td
-(2475     print "  .long vector$i\\n";) 157.2665 Tj
-0 -275.3075 Td
-(2476 }) 26.2111 Tj
-0 -284.8008 Td
-(2477 ) 21.8426 Tj
-0 -294.2942 Td
-(2478 # sample output:) 91.7388 Tj
-0 -303.7875 Td
-(2479 #   # handlers) 83.0018 Tj
-0 -313.2809 Td
-(2480 #   .globl alltraps) 104.8443 Tj
-0 -322.7743 Td
-(2481 #   .globl vector0) 100.4758 Tj
-0 -332.2676 Td
-(2482 #   vector0:) 74.2647 Tj
-0 -341.761 Td
-(2483 #     pushl $0) 83.0018 Tj
-0 -351.2543 Td
-(2484 #     pushl $0) 83.0018 Tj
-0 -360.7477 Td
-(2485 #     jmp alltraps) 100.4758 Tj
-0 -370.2411 Td
-(2486 #   ...) 52.4222 Tj
-0 -379.7344 Td
-(2487 #) 26.2111 Tj
-0 -389.2278 Td
-(2488 #   # vector table) 100.4758 Tj
-0 -398.7211 Td
-(2489 #   .data) 61.1592 Tj
-0 -408.2145 Td
-(2490 #   .globl vectors) 100.4758 Tj
-0 -417.7079 Td
-(2491 #   vectors:) 74.2647 Tj
-0 -427.2012 Td
-(2492 #     .long vector0) 104.8443 Tj
-0 -436.6946 Td
-(2493 #     .long vector1) 104.8443 Tj
-0 -446.1879 Td
-(2494 #     .long vector2) 104.8443 Tj
-0 -455.6813 Td
-(2495 #   ...) 52.4222 Tj
-0 -465.1747 Td
-(2496 ) 21.8426 Tj
-0 -474.668 Td
-(2497 ) 21.8426 Tj
-0 -484.1614 Td
-(2498 ) 21.8426 Tj
-0 -493.6547 Td
-(2499 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 24) 34.9481 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
-%%Page: 32 32
-%%BeginPageSetup
-%%PageOrientation: Landscape
-pdfStartPage
-180 rotate
--612 -792 translate
-0 0 612 792 re W
-%%EndPageSetup
-[] 0 d
-1 i
-0 j
-0 J
-10 M
-1 w
-/DeviceGray {} cs
-[0] sc
-/DeviceGray {} CS
-[0] SC
-false op
-false OP
-{} settransfer
-0 0 612 792 re
-W
-q
-q
-[0.1 0 0 0.1 0 0] cm
-q
-180 3960 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 738.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/trapasm.S  Page 1) 174.7406 Tj
-0 -28.4801 Td
-(2500 #define SEG_KCODE 1  // kernel code) 174.7406 Tj
-0 -37.9735 Td
-(2501 #define SEG_KDATA 2  // kernel data+stack) 200.9517 Tj
-0 -47.4668 Td
-(2502 #define SEG_KCPU  3  // kernel per-cpu data) 209.6887 Tj
-0 -56.9602 Td
-(2503 ) 21.8426 Tj
-0 -66.4535 Td
-(2504   # vectors.S sends all traps here.) 174.7406 Tj
-0 -75.9469 Td
-(2505 .globl alltraps) 87.3703 Tj
-0 -85.4403 Td
-(2506 alltraps:) 61.1592 Tj
-0 -94.9336 Td
-(2507   # Build trap frame.) 113.5814 Tj
-0 -104.427 Td
-(2508   pushl %ds) 69.8962 Tj
-0 -113.9203 Td
-(2509   pushl %es) 69.8962 Tj
-0 -123.4137 Td
-(2510   pushl %fs) 69.8962 Tj
-0 -132.9071 Td
-(2511   pushl %gs) 69.8962 Tj
-0 -142.4004 Td
-(2512   pushal) 56.7907 Tj
-0 -151.8938 Td
-(2513 ) 21.8426 Tj
-0 -161.3871 Td
-(2514   # Set up data and per-cpu segments.) 183.4776 Tj
-0 -170.8805 Td
-(2515   movw $\(SEG_KDATA<<3\), %ax) 139.7925 Tj
-0 -180.3739 Td
-(2516   movw %ax, %ds) 87.3703 Tj
-0 -189.8672 Td
-(2517   movw %ax, %es) 87.3703 Tj
-0 -199.3606 Td
-(2518   movw $\(SEG_KCPU<<3\), %ax) 135.4239 Tj
-0 -208.8539 Td
-(2519   movw %ax, %fs) 87.3703 Tj
-0 -218.3473 Td
-(2520   movw %ax, %gs) 87.3703 Tj
-0 -227.8407 Td
-(2521 ) 21.8426 Tj
-0 -237.334 Td
-(2522   # Call trap\(tf\), where tf=%esp) 161.635 Tj
-0 -246.8274 Td
-(2523   pushl %esp) 74.2647 Tj
-0 -256.3207 Td
-(2524   call trap) 69.8962 Tj
-0 -265.8141 Td
-(2525   addl $4, %esp) 87.3703 Tj
-0 -275.3075 Td
-(2526 ) 21.8426 Tj
-0 -284.8008 Td
-(2527   # Return falls through to trapret...) 187.8461 Tj
-0 -294.2942 Td
-(2528 .globl trapret) 83.0018 Tj
-0 -303.7875 Td
-(2529 trapret:) 56.7907 Tj
-0 -313.2809 Td
-(2530   popal) 52.4222 Tj
-0 -322.7743 Td
-(2531   popl %gs) 65.5277 Tj
-0 -332.2676 Td
-(2532   popl %fs) 65.5277 Tj
-0 -341.761 Td
-(2533   popl %es) 65.5277 Tj
-0 -351.2543 Td
-(2534   popl %ds) 65.5277 Tj
-0 -360.7477 Td
-(2535   addl $0x8, %esp  # trapno and errcode) 192.2146 Tj
-0 -370.2411 Td
-(2536   iret) 48.0537 Tj
-0 -379.7344 Td
-(2537 ) 21.8426 Tj
-0 -389.2278 Td
-(2538 ) 21.8426 Tj
-0 -398.7211 Td
-(2539 ) 21.8426 Tj
-0 -408.2145 Td
-(2540 ) 21.8426 Tj
-0 -417.7079 Td
-(2541 ) 21.8426 Tj
-0 -427.2012 Td
-(2542 ) 21.8426 Tj
-0 -436.6946 Td
-(2543 ) 21.8426 Tj
-0 -446.1879 Td
-(2544 ) 21.8426 Tj
-0 -455.6813 Td
-(2545 ) 21.8426 Tj
-0 -465.1747 Td
-(2546 ) 21.8426 Tj
-0 -474.668 Td
-(2547 ) 21.8426 Tj
-0 -484.1614 Td
-(2548 ) 21.8426 Tj
-0 -493.6547 Td
-(2549 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 25) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/trap.c  Page 1) 161.635 Tj
-0 -28.4801 Td
-(2550 #include "types.h") 100.4758 Tj
-0 -37.9735 Td
-(2551 #include "defs.h") 96.1073 Tj
-0 -47.4668 Td
-(2552 #include "param.h") 100.4758 Tj
-0 -56.9602 Td
-(2553 #include "mmu.h") 91.7388 Tj
-0 -66.4535 Td
-(2554 #include "proc.h") 96.1073 Tj
-0 -75.9469 Td
-(2555 #include "x86.h") 91.7388 Tj
-0 -85.4403 Td
-(2556 #include "traps.h") 100.4758 Tj
-0 -94.9336 Td
-(2557 #include "spinlock.h") 113.5814 Tj
-0 -104.427 Td
-(2558 ) 21.8426 Tj
-0 -113.9203 Td
-(2559 // Interrupt descriptor table \(shared by all CPUs\).) 244.6368 Tj
-0 -123.4137 Td
-(2560 struct gatedesc idt[256];) 131.0554 Tj
-0 -132.9071 Td
-(2561 extern uint vectors[];  // in vectors.S: array of 256 entr\
-y pointers) 318.9016 Tj
-0 -142.4004 Td
-(2562 struct spinlock tickslock;) 135.4239 Tj
-0 -151.8938 Td
-(2563 int ticks;) 65.5277 Tj
-0 -161.3871 Td
-(2564 ) 21.8426 Tj
-0 -170.8805 Td
-(2565 void) 39.3166 Tj
-0 -180.3739 Td
-(2566 tvinit\(void\)) 74.2647 Tj
-0 -189.8672 Td
-(2567 {) 26.2111 Tj
-0 -199.3606 Td
-(2568   int i;) 56.7907 Tj
-0 -208.8539 Td
-(2569 ) 21.8426 Tj
-0 -218.3473 Td
-(2570   for\(i = 0; i < 256; i++\)) 135.4239 Tj
-0 -227.8407 Td
-(2571     SETGATE\(idt[i], 0, SEG_KCODE<<3, vectors[i], 0\);) 249.0053 Tj
-0 -237.334 Td
-(2572   SETGATE\(idt[T_SYSCALL], 1, SEG_KCODE<<3, vectors[T_SYSC\
-ALL], DPL_USER\);) 340.7441 Tj
-0 -246.8274 Td
-(2573 ) 21.8426 Tj
-0 -256.3207 Td
-(2574   initlock\(&tickslock, "time"\);) 157.2665 Tj
-0 -265.8141 Td
-(2575 }) 26.2111 Tj
-0 -275.3075 Td
-(2576 ) 21.8426 Tj
-0 -284.8008 Td
-(2577 void) 39.3166 Tj
-0 -294.2942 Td
-(2578 idtinit\(void\)) 78.6333 Tj
-0 -303.7875 Td
-(2579 {) 26.2111 Tj
-0 -313.2809 Td
-(2580   lidt\(idt, sizeof\(idt\)\);) 131.0554 Tj
-0 -322.7743 Td
-(2581 }) 26.2111 Tj
-0 -332.2676 Td
-(2582 ) 21.8426 Tj
-0 -341.761 Td
-(2583 ) 21.8426 Tj
-0 -351.2543 Td
-(2584 ) 21.8426 Tj
-0 -360.7477 Td
-(2585 ) 21.8426 Tj
-0 -370.2411 Td
-(2586 ) 21.8426 Tj
-0 -379.7344 Td
-(2587 ) 21.8426 Tj
-0 -389.2278 Td
-(2588 ) 21.8426 Tj
-0 -398.7211 Td
-(2589 ) 21.8426 Tj
-0 -408.2145 Td
-(2590 ) 21.8426 Tj
-0 -417.7079 Td
-(2591 ) 21.8426 Tj
-0 -427.2012 Td
-(2592 ) 21.8426 Tj
-0 -436.6946 Td
-(2593 ) 21.8426 Tj
-0 -446.1879 Td
-(2594 ) 21.8426 Tj
-0 -455.6813 Td
-(2595 ) 21.8426 Tj
-0 -465.1747 Td
-(2596 ) 21.8426 Tj
-0 -474.668 Td
-(2597 ) 21.8426 Tj
-0 -484.1614 Td
-(2598 ) 21.8426 Tj
-0 -493.6547 Td
-(2599 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 25) 34.9481 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
-%%Page: 33 33
-%%BeginPageSetup
-%%PageOrientation: Landscape
-pdfStartPage
-180 rotate
--612 -792 translate
-0 0 612 792 re W
-%%EndPageSetup
-[] 0 d
-1 i
-0 j
-0 J
-10 M
-1 w
-/DeviceGray {} cs
-[0] sc
-/DeviceGray {} CS
-[0] SC
-false op
-false OP
-{} settransfer
-0 0 612 792 re
-W
-q
-q
-[0.1 0 0 0.1 0 0] cm
-q
-180 3960 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 738.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/trap.c  Page 2) 161.635 Tj
-0 -28.4801 Td
-(2600 void) 39.3166 Tj
-0 -37.9735 Td
-(2601 trap\(struct trapframe *tf\)) 135.4239 Tj
-0 -47.4668 Td
-(2602 {) 26.2111 Tj
-0 -56.9602 Td
-(2603   if\(tf->trapno == T_SYSCALL\){) 152.898 Tj
-0 -66.4535 Td
-(2604     if\(proc->killed\)) 109.2129 Tj
-0 -75.9469 Td
-(2605       exit\(\);) 78.6333 Tj
-0 -85.4403 Td
-(2606     proc->tf = tf;) 100.4758 Tj
-0 -94.9336 Td
-(2607     syscall\(\);) 83.0018 Tj
-0 -104.427 Td
-(2608     if\(proc->killed\)) 109.2129 Tj
-0 -113.9203 Td
-(2609       exit\(\);) 78.6333 Tj
-0 -123.4137 Td
-(2610     return;) 69.8962 Tj
-0 -132.9071 Td
-(2611   }) 34.9481 Tj
-0 -142.4004 Td
-(2612 ) 21.8426 Tj
-0 -151.8938 Td
-(2613   switch\(tf->trapno\){) 113.5814 Tj
-0 -161.3871 Td
-(2614   case T_IRQ0 + IRQ_TIMER:) 135.4239 Tj
-0 -170.8805 Td
-(2615     if\(cpu->id == 0\){) 113.5814 Tj
-0 -180.3739 Td
-(2616       acquire\(&tickslock\);) 135.4239 Tj
-0 -189.8672 Td
-(2617       ticks++;) 83.0018 Tj
-0 -199.3606 Td
-(2618       wakeup\(&ticks\);) 113.5814 Tj
-0 -208.8539 Td
-(2619       release\(&tickslock\);) 135.4239 Tj
-0 -218.3473 Td
-(2620     }) 43.6851 Tj
-0 -227.8407 Td
-(2621     lapiceoi\(\);) 87.3703 Tj
-0 -237.334 Td
-(2622     break;) 65.5277 Tj
-0 -246.8274 Td
-(2623   case T_IRQ0 + IRQ_IDE:) 126.6869 Tj
-0 -256.3207 Td
-(2624     ideintr\(\);) 83.0018 Tj
-0 -265.8141 Td
-(2625     lapiceoi\(\);) 87.3703 Tj
-0 -275.3075 Td
-(2626     break;) 65.5277 Tj
-0 -284.8008 Td
-(2627   case T_IRQ0 + IRQ_KBD:) 126.6869 Tj
-0 -294.2942 Td
-(2628     kbdintr\(\);) 83.0018 Tj
-0 -303.7875 Td
-(2629     lapiceoi\(\);) 87.3703 Tj
-0 -313.2809 Td
-(2630     break;) 65.5277 Tj
-0 -322.7743 Td
-(2631   case T_IRQ0 + IRQ_COM1:) 131.0554 Tj
-0 -332.2676 Td
-(2632     uartintr\(\);) 87.3703 Tj
-0 -341.761 Td
-(2633     lapiceoi\(\);) 87.3703 Tj
-0 -351.2543 Td
-(2634     break;) 65.5277 Tj
-0 -360.7477 Td
-(2635   case T_IRQ0 + 7:) 100.4758 Tj
-0 -370.2411 Td
-(2636   case T_IRQ0 + IRQ_SPURIOUS:) 148.5295 Tj
-0 -379.7344 Td
-(2637     cprintf\("cpu%d: spurious interrupt at %x:%x\\n",) 244.6368 Tj
-0 -389.2278 Td
-(2638             cpu->id, tf->cs, tf->eip\);) 187.8461 Tj
-0 -398.7211 Td
-(2639     lapiceoi\(\);) 87.3703 Tj
-0 -408.2145 Td
-(2640     break;) 65.5277 Tj
-0 -417.7079 Td
-(2641 ) 21.8426 Tj
-0 -427.2012 Td
-(2642 ) 21.8426 Tj
-0 -436.6946 Td
-(2643 ) 21.8426 Tj
-0 -446.1879 Td
-(2644 ) 21.8426 Tj
-0 -455.6813 Td
-(2645 ) 21.8426 Tj
-0 -465.1747 Td
-(2646 ) 21.8426 Tj
-0 -474.668 Td
-(2647 ) 21.8426 Tj
-0 -484.1614 Td
-(2648 ) 21.8426 Tj
-0 -493.6547 Td
-(2649 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 26) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/trap.c  Page 3) 161.635 Tj
-0 -28.4801 Td
-(2650   default:) 65.5277 Tj
-0 -37.9735 Td
-(2651     if\(proc == 0 || \(tf->cs&3\) == 0\){) 183.4776 Tj
-0 -47.4668 Td
-(2652       // In kernel, it must be our mistake.) 209.6887 Tj
-0 -56.9602 Td
-(2653       cprintf\("unexpected trap %d from cpu %d eip %x\\n",) 266.4794 Tj
-0 -66.4535 Td
-(2654               tf->trapno, cpu->id, tf->eip\);) 214.0572 Tj
-0 -75.9469 Td
-(2655       panic\("trap"\);) 109.2129 Tj
-0 -85.4403 Td
-(2656     }) 43.6851 Tj
-0 -94.9336 Td
-(2657     // In user space, assume process misbehaved.) 231.5313 Tj
-0 -104.427 Td
-(2658     cprintf\("pid %d %s: trap %d err %d on cpu %d eip %x -\
-- kill proc\\n",) 336.3756 Tj
-0 -113.9203 Td
-(2659             proc->pid, proc->name, tf->trapno, tf->err, cp\
-u->id, tf->eip\);) 345.1126 Tj
-0 -123.4137 Td
-(2660     proc->killed = 1;) 113.5814 Tj
-0 -132.9071 Td
-(2661   }) 34.9481 Tj
-0 -142.4004 Td
-(2662 ) 21.8426 Tj
-0 -151.8938 Td
-(2663   // Force process exit if it has been killed and is in us\
-er space.) 314.533 Tj
-0 -161.3871 Td
-(2664   // \(If it is still executing in the kernel, let it keep\
- running) 305.796 Tj
-0 -170.8805 Td
-(2665   // until it gets to the regular system call return.\)) 257.7424 Tj
-0 -180.3739 Td
-(2666   if\(proc && proc->killed && \(tf->cs&3\) == DPL_USER\)) 249.0053 Tj
-0 -189.8672 Td
-(2667     exit\(\);) 69.8962 Tj
-0 -199.3606 Td
-(2668 ) 21.8426 Tj
-0 -208.8539 Td
-(2669   // Force process to give up CPU on clock tick.) 231.5313 Tj
-0 -218.3473 Td
-(2670   // If interrupts were on while locks held, would need to\
- check nlock.) 332.0071 Tj
-0 -227.8407 Td
-(2671   if\(proc && proc->state == RUNNING && tf->trapno == T_IR\
-Q0+IRQ_TIMER\)) 327.6386 Tj
-0 -237.334 Td
-(2672     yield\(\);) 74.2647 Tj
-0 -246.8274 Td
-(2673 ) 21.8426 Tj
-0 -256.3207 Td
-(2674   // Check if the process has been killed since we yielded) 275.2164 Tj
-0 -265.8141 Td
-(2675   if\(proc && proc->killed && \(tf->cs&3\) == DPL_USER\)) 249.0053 Tj
-0 -275.3075 Td
-(2676     exit\(\);) 69.8962 Tj
-0 -284.8008 Td
-(2677 }) 26.2111 Tj
-0 -294.2942 Td
-(2678 ) 21.8426 Tj
-0 -303.7875 Td
-(2679 ) 21.8426 Tj
-0 -313.2809 Td
-(2680 ) 21.8426 Tj
-0 -322.7743 Td
-(2681 ) 21.8426 Tj
-0 -332.2676 Td
-(2682 ) 21.8426 Tj
-0 -341.761 Td
-(2683 ) 21.8426 Tj
-0 -351.2543 Td
-(2684 ) 21.8426 Tj
-0 -360.7477 Td
-(2685 ) 21.8426 Tj
-0 -370.2411 Td
-(2686 ) 21.8426 Tj
-0 -379.7344 Td
-(2687 ) 21.8426 Tj
-0 -389.2278 Td
-(2688 ) 21.8426 Tj
-0 -398.7211 Td
-(2689 ) 21.8426 Tj
-0 -408.2145 Td
-(2690 ) 21.8426 Tj
-0 -417.7079 Td
-(2691 ) 21.8426 Tj
-0 -427.2012 Td
-(2692 ) 21.8426 Tj
-0 -436.6946 Td
-(2693 ) 21.8426 Tj
-0 -446.1879 Td
-(2694 ) 21.8426 Tj
-0 -455.6813 Td
-(2695 ) 21.8426 Tj
-0 -465.1747 Td
-(2696 ) 21.8426 Tj
-0 -474.668 Td
-(2697 ) 21.8426 Tj
-0 -484.1614 Td
-(2698 ) 21.8426 Tj
-0 -493.6547 Td
-(2699 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 26) 34.9481 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
-%%Page: 34 34
-%%BeginPageSetup
-%%PageOrientation: Landscape
-pdfStartPage
-180 rotate
--612 -792 translate
-0 0 612 792 re W
-%%EndPageSetup
-[] 0 d
-1 i
-0 j
-0 J
-10 M
-1 w
-/DeviceGray {} cs
-[0] sc
-/DeviceGray {} CS
-[0] SC
-false op
-false OP
-{} settransfer
-0 0 612 792 re
-W
-q
-q
-[0.1 0 0 0.1 0 0] cm
-q
-180 3960 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 738.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/syscall.h  Page 1) 174.7406 Tj
-0 -28.4801 Td
-(2700 // System call numbers) 117.9499 Tj
-0 -37.9735 Td
-(2701 #define SYS_fork    1) 113.5814 Tj
-0 -47.4668 Td
-(2702 #define SYS_exit    2) 113.5814 Tj
-0 -56.9602 Td
-(2703 #define SYS_wait    3) 113.5814 Tj
-0 -66.4535 Td
-(2704 #define SYS_pipe    4) 113.5814 Tj
-0 -75.9469 Td
-(2705 #define SYS_write   5) 113.5814 Tj
-0 -85.4403 Td
-(2706 #define SYS_read    6) 113.5814 Tj
-0 -94.9336 Td
-(2707 #define SYS_close   7) 113.5814 Tj
-0 -104.427 Td
-(2708 #define SYS_kill    8) 113.5814 Tj
-0 -113.9203 Td
-(2709 #define SYS_exec    9) 113.5814 Tj
-0 -123.4137 Td
-(2710 #define SYS_open   10) 113.5814 Tj
-0 -132.9071 Td
-(2711 #define SYS_mknod  11) 113.5814 Tj
-0 -142.4004 Td
-(2712 #define SYS_unlink 12) 113.5814 Tj
-0 -151.8938 Td
-(2713 #define SYS_fstat  13) 113.5814 Tj
-0 -161.3871 Td
-(2714 #define SYS_link   14) 113.5814 Tj
-0 -170.8805 Td
-(2715 #define SYS_mkdir  15) 113.5814 Tj
-0 -180.3739 Td
-(2716 #define SYS_chdir  16) 113.5814 Tj
-0 -189.8672 Td
-(2717 #define SYS_dup    17) 113.5814 Tj
-0 -199.3606 Td
-(2718 #define SYS_getpid 18) 113.5814 Tj
-0 -208.8539 Td
-(2719 #define SYS_sbrk   19) 113.5814 Tj
-0 -218.3473 Td
-(2720 #define SYS_sleep  20) 113.5814 Tj
-0 -227.8407 Td
-(2721 ) 21.8426 Tj
-0 -237.334 Td
-(2722 ) 21.8426 Tj
-0 -246.8274 Td
-(2723 ) 21.8426 Tj
-0 -256.3207 Td
-(2724 ) 21.8426 Tj
-0 -265.8141 Td
-(2725 ) 21.8426 Tj
-0 -275.3075 Td
-(2726 ) 21.8426 Tj
-0 -284.8008 Td
-(2727 ) 21.8426 Tj
-0 -294.2942 Td
-(2728 ) 21.8426 Tj
-0 -303.7875 Td
-(2729 ) 21.8426 Tj
-0 -313.2809 Td
-(2730 ) 21.8426 Tj
-0 -322.7743 Td
-(2731 ) 21.8426 Tj
-0 -332.2676 Td
-(2732 ) 21.8426 Tj
-0 -341.761 Td
-(2733 ) 21.8426 Tj
-0 -351.2543 Td
-(2734 ) 21.8426 Tj
-0 -360.7477 Td
-(2735 ) 21.8426 Tj
-0 -370.2411 Td
-(2736 ) 21.8426 Tj
-0 -379.7344 Td
-(2737 ) 21.8426 Tj
-0 -389.2278 Td
-(2738 ) 21.8426 Tj
-0 -398.7211 Td
-(2739 ) 21.8426 Tj
-0 -408.2145 Td
-(2740 ) 21.8426 Tj
-0 -417.7079 Td
-(2741 ) 21.8426 Tj
-0 -427.2012 Td
-(2742 ) 21.8426 Tj
-0 -436.6946 Td
-(2743 ) 21.8426 Tj
-0 -446.1879 Td
-(2744 ) 21.8426 Tj
-0 -455.6813 Td
-(2745 ) 21.8426 Tj
-0 -465.1747 Td
-(2746 ) 21.8426 Tj
-0 -474.668 Td
-(2747 ) 21.8426 Tj
-0 -484.1614 Td
-(2748 ) 21.8426 Tj
-0 -493.6547 Td
-(2749 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 27) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/syscall.c  Page 1) 174.7406 Tj
-0 -28.4801 Td
-(2750 #include "types.h") 100.4758 Tj
-0 -37.9735 Td
-(2751 #include "defs.h") 96.1073 Tj
-0 -47.4668 Td
-(2752 #include "param.h") 100.4758 Tj
-0 -56.9602 Td
-(2753 #include "mmu.h") 91.7388 Tj
-0 -66.4535 Td
-(2754 #include "proc.h") 96.1073 Tj
-0 -75.9469 Td
-(2755 #include "x86.h") 91.7388 Tj
-0 -85.4403 Td
-(2756 #include "syscall.h") 109.2129 Tj
-0 -94.9336 Td
-(2757 ) 21.8426 Tj
-0 -104.427 Td
-(2758 // User code makes a system call with INT T_SYSCALL.) 249.0053 Tj
-0 -113.9203 Td
-(2759 // System call number in %eax.) 152.898 Tj
-0 -123.4137 Td
-(2760 // Arguments on the stack, from the user call to the C) 257.7424 Tj
-0 -132.9071 Td
-(2761 // library system call function. The saved user %esp point\
-s) 279.5849 Tj
-0 -142.4004 Td
-(2762 // to a saved program counter, and then the first argument\
-.) 279.5849 Tj
-0 -151.8938 Td
-(2763 ) 21.8426 Tj
-0 -161.3871 Td
-(2764 // Fetch the int at addr from process p.) 196.5831 Tj
-0 -170.8805 Td
-(2765 int) 34.9481 Tj
-0 -180.3739 Td
-(2766 fetchint\(struct proc *p, uint addr, int *ip\)) 214.0572 Tj
-0 -189.8672 Td
-(2767 {) 26.2111 Tj
-0 -199.3606 Td
-(2768   if\(addr >= p->sz || addr+4 > p->sz\)) 183.4776 Tj
-0 -208.8539 Td
-(2769     return -1;) 83.0018 Tj
-0 -218.3473 Td
-(2770   *ip = *\(int*\)\(p->mem + addr\);) 157.2665 Tj
-0 -227.8407 Td
-(2771   return 0;) 69.8962 Tj
-0 -237.334 Td
-(2772 }) 26.2111 Tj
-0 -246.8274 Td
-(2773 ) 21.8426 Tj
-0 -256.3207 Td
-(2774 // Fetch the nul-terminated string at addr from process p.) 275.2164 Tj
-0 -265.8141 Td
-(2775 // Doesn't actually copy the string - just sets *pp to poi\
-nt at it.) 314.533 Tj
-0 -275.3075 Td
-(2776 // Returns length of string, not including nul.) 227.1628 Tj
-0 -284.8008 Td
-(2777 int) 34.9481 Tj
-0 -294.2942 Td
-(2778 fetchstr\(struct proc *p, uint addr, char **pp\)) 222.7942 Tj
-0 -303.7875 Td
-(2779 {) 26.2111 Tj
-0 -313.2809 Td
-(2780   char *s, *ep;) 87.3703 Tj
-0 -322.7743 Td
-(2781 ) 21.8426 Tj
-0 -332.2676 Td
-(2782   if\(addr >= p->sz\)) 104.8443 Tj
-0 -341.761 Td
-(2783     return -1;) 83.0018 Tj
-0 -351.2543 Td
-(2784   *pp = p->mem + addr;) 117.9499 Tj
-0 -360.7477 Td
-(2785   ep = p->mem + p->sz;) 117.9499 Tj
-0 -370.2411 Td
-(2786   for\(s = *pp; s < ep; s++\)) 139.7925 Tj
-0 -379.7344 Td
-(2787     if\(*s == 0\)) 87.3703 Tj
-0 -389.2278 Td
-(2788       return s - *pp;) 113.5814 Tj
-0 -398.7211 Td
-(2789   return -1;) 74.2647 Tj
-0 -408.2145 Td
-(2790 }) 26.2111 Tj
-0 -417.7079 Td
-(2791 ) 21.8426 Tj
-0 -427.2012 Td
-(2792 // Fetch the nth 32-bit system call argument.) 218.4257 Tj
-0 -436.6946 Td
-(2793 int) 34.9481 Tj
-0 -446.1879 Td
-(2794 argint\(int n, int *ip\)) 117.9499 Tj
-0 -455.6813 Td
-(2795 {) 26.2111 Tj
-0 -465.1747 Td
-(2796   return fetchint\(proc, proc->tf->esp + 4 + 4*n, ip\);) 253.3738 Tj
-0 -474.668 Td
-(2797 }) 26.2111 Tj
-0 -484.1614 Td
-(2798 ) 21.8426 Tj
-0 -493.6547 Td
-(2799 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 27) 34.9481 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
-%%Page: 35 35
-%%BeginPageSetup
-%%PageOrientation: Landscape
-pdfStartPage
-180 rotate
--612 -792 translate
-0 0 612 792 re W
-%%EndPageSetup
-[] 0 d
-1 i
-0 j
-0 J
-10 M
-1 w
-/DeviceGray {} cs
-[0] sc
-/DeviceGray {} CS
-[0] SC
-false op
-false OP
-{} settransfer
-0 0 612 792 re
-W
-q
-q
-[0.1 0 0 0.1 0 0] cm
-q
-180 3960 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 738.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/syscall.c  Page 2) 174.7406 Tj
-0 -28.4801 Td
-(2800 // Fetch the nth word-sized system call argument as a poin\
-ter) 288.322 Tj
-0 -37.9735 Td
-(2801 // to a block of memory of size n bytes.  Check that the p\
-ointer) 301.4275 Tj
-0 -47.4668 Td
-(2802 // lies within the process address space.) 200.9517 Tj
-0 -56.9602 Td
-(2803 int) 34.9481 Tj
-0 -66.4535 Td
-(2804 argptr\(int n, char **pp, int size\)) 170.3721 Tj
-0 -75.9469 Td
-(2805 {) 26.2111 Tj
-0 -85.4403 Td
-(2806   int i;) 56.7907 Tj
-0 -94.9336 Td
-(2807 ) 21.8426 Tj
-0 -104.427 Td
-(2808   if\(argint\(n, &i\) < 0\)) 122.3184 Tj
-0 -113.9203 Td
-(2809     return -1;) 83.0018 Tj
-0 -123.4137 Td
-(2810   if\(\(uint\)i >= proc->sz || \(uint\)i+size >= proc->sz\)) 253.3738 Tj
-0 -132.9071 Td
-(2811     return -1;) 83.0018 Tj
-0 -142.4004 Td
-(2812   *pp = proc->mem + i;) 117.9499 Tj
-0 -151.8938 Td
-(2813   return 0;) 69.8962 Tj
-0 -161.3871 Td
-(2814 }) 26.2111 Tj
-0 -170.8805 Td
-(2815 ) 21.8426 Tj
-0 -180.3739 Td
-(2816 // Fetch the nth word-sized system call argument as a stri\
-ng pointer.) 323.2701 Tj
-0 -189.8672 Td
-(2817 // Check that the pointer is valid and the string is nul-t\
-erminated.) 318.9016 Tj
-0 -199.3606 Td
-(2818 // \(There is no shared writable memory, so the string can\
-'t change) 310.1645 Tj
-0 -208.8539 Td
-(2819 // between this check and being used by the kernel.\)) 249.0053 Tj
-0 -218.3473 Td
-(2820 int) 34.9481 Tj
-0 -227.8407 Td
-(2821 argstr\(int n, char **pp\)) 126.6869 Tj
-0 -237.334 Td
-(2822 {) 26.2111 Tj
-0 -246.8274 Td
-(2823   int addr;) 69.8962 Tj
-0 -256.3207 Td
-(2824   if\(argint\(n, &addr\) < 0\)) 135.4239 Tj
-0 -265.8141 Td
-(2825     return -1;) 83.0018 Tj
-0 -275.3075 Td
-(2826   return fetchstr\(proc, addr, pp\);) 170.3721 Tj
-0 -284.8008 Td
-(2827 }) 26.2111 Tj
-0 -294.2942 Td
-(2828 ) 21.8426 Tj
-0 -303.7875 Td
-(2829 extern int sys_chdir\(void\);) 139.7925 Tj
-0 -313.2809 Td
-(2830 extern int sys_close\(void\);) 139.7925 Tj
-0 -322.7743 Td
-(2831 extern int sys_dup\(void\);) 131.0554 Tj
-0 -332.2676 Td
-(2832 extern int sys_exec\(void\);) 135.4239 Tj
-0 -341.761 Td
-(2833 extern int sys_exit\(void\);) 135.4239 Tj
-0 -351.2543 Td
-(2834 extern int sys_fork\(void\);) 135.4239 Tj
-0 -360.7477 Td
-(2835 extern int sys_fstat\(void\);) 139.7925 Tj
-0 -370.2411 Td
-(2836 extern int sys_getpid\(void\);) 144.161 Tj
-0 -379.7344 Td
-(2837 extern int sys_kill\(void\);) 135.4239 Tj
-0 -389.2278 Td
-(2838 extern int sys_link\(void\);) 135.4239 Tj
-0 -398.7211 Td
-(2839 extern int sys_mkdir\(void\);) 139.7925 Tj
-0 -408.2145 Td
-(2840 extern int sys_mknod\(void\);) 139.7925 Tj
-0 -417.7079 Td
-(2841 extern int sys_open\(void\);) 135.4239 Tj
-0 -427.2012 Td
-(2842 extern int sys_pipe\(void\);) 135.4239 Tj
-0 -436.6946 Td
-(2843 extern int sys_read\(void\);) 135.4239 Tj
-0 -446.1879 Td
-(2844 extern int sys_sbrk\(void\);) 135.4239 Tj
-0 -455.6813 Td
-(2845 extern int sys_sleep\(void\);) 139.7925 Tj
-0 -465.1747 Td
-(2846 extern int sys_unlink\(void\);) 144.161 Tj
-0 -474.668 Td
-(2847 extern int sys_wait\(void\);) 135.4239 Tj
-0 -484.1614 Td
-(2848 extern int sys_write\(void\);) 139.7925 Tj
-0 -493.6547 Td
-(2849 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 28) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
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-(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
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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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-(2872 ) 21.8426 Tj
-0 -246.8274 Td
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-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
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-(2887 ) 21.8426 Tj
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-(3150 // On-disk file system format.) 152.898 Tj
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-(3151 // Both the kernel and user programs use this header file.) 275.2164 Tj
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-(3152 ) 21.8426 Tj
-0 -56.9602 Td
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-y\)) 279.5849 Tj
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-(3175   short minor;          // Minor device number \(T_DEV onl\
-y\)) 279.5849 Tj
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-0 -284.8008 Td
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-0 -294.2942 Td
-(3178   uint addrs[NDIRECT+1];   // Data block addresses) 240.2683 Tj
-0 -303.7875 Td
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-0 -313.2809 Td
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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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-(3185 #define IBLOCK\(i\)     \(\(i\) / IPB + 2\)) 183.4776 Tj
-0 -370.2411 Td
-(3186 ) 21.8426 Tj
-0 -379.7344 Td
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-0 -389.2278 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
-(3363     if\(inb\(0x1f7\) != 0\){) 126.6869 Tj
-0 -161.3871 Td
-(3364       havedisk1 = 1;) 109.2129 Tj
-0 -170.8805 Td
-(3365       break;) 74.2647 Tj
-0 -180.3739 Td
-(3366     }) 43.6851 Tj
-0 -189.8672 Td
-(3367   }) 34.9481 Tj
-0 -199.3606 Td
-(3368 ) 21.8426 Tj
-0 -208.8539 Td
-(3369   // Switch back to disk 0.) 139.7925 Tj
-0 -218.3473 Td
-(3370   outb\(0x1f6, 0xe0 | \(0<<4\)\);) 148.5295 Tj
-0 -227.8407 Td
-(3371 }) 26.2111 Tj
-0 -237.334 Td
-(3372 ) 21.8426 Tj
-0 -246.8274 Td
-(3373 // Start the request for b.  Caller must hold idelock.) 257.7424 Tj
-0 -256.3207 Td
-(3374 static void) 69.8962 Tj
-0 -265.8141 Td
-(3375 idestart\(struct buf *b\)) 122.3184 Tj
-0 -275.3075 Td
-(3376 {) 26.2111 Tj
-0 -284.8008 Td
-(3377   if\(b == 0\)) 74.2647 Tj
-0 -294.2942 Td
-(3378     panic\("idestart"\);) 117.9499 Tj
-0 -303.7875 Td
-(3379 ) 21.8426 Tj
-0 -313.2809 Td
-(3380   idewait\(0\);) 78.6333 Tj
-0 -322.7743 Td
-(3381   outb\(0x3f6, 0\);  // generate interrupt) 196.5831 Tj
-0 -332.2676 Td
-(3382   outb\(0x1f2, 1\);  // number of sectors) 192.2146 Tj
-0 -341.761 Td
-(3383   outb\(0x1f3, b->sector & 0xff\);) 161.635 Tj
-0 -351.2543 Td
-(3384   outb\(0x1f4, \(b->sector >> 8\) & 0xff\);) 192.2146 Tj
-0 -360.7477 Td
-(3385   outb\(0x1f5, \(b->sector >> 16\) & 0xff\);) 196.5831 Tj
-0 -370.2411 Td
-(3386   outb\(0x1f6, 0xe0 | \(\(b->dev&1\)<<4\) | \(\(b->sector>\
->24\)&0x0f\)\);) 297.059 Tj
-0 -379.7344 Td
-(3387   if\(b->flags & B_DIRTY\){) 131.0554 Tj
-0 -389.2278 Td
-(3388     outb\(0x1f7, IDE_CMD_WRITE\);) 157.2665 Tj
-0 -398.7211 Td
-(3389     outsl\(0x1f0, b->data, 512/4\);) 166.0035 Tj
-0 -408.2145 Td
-(3390   } else {) 65.5277 Tj
-0 -417.7079 Td
-(3391     outb\(0x1f7, IDE_CMD_READ\);) 152.898 Tj
-0 -427.2012 Td
-(3392   }) 34.9481 Tj
-0 -436.6946 Td
-(3393 }) 26.2111 Tj
-0 -446.1879 Td
-(3394 ) 21.8426 Tj
-0 -455.6813 Td
-(3395 ) 21.8426 Tj
-0 -465.1747 Td
-(3396 ) 21.8426 Tj
-0 -474.668 Td
-(3397 ) 21.8426 Tj
-0 -484.1614 Td
-(3398 ) 21.8426 Tj
-0 -493.6547 Td
-(3399 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 33) 34.9481 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
-%%Page: 41 41
-%%BeginPageSetup
-%%PageOrientation: Landscape
-pdfStartPage
-180 rotate
--612 -792 translate
-0 0 612 792 re W
-%%EndPageSetup
-[] 0 d
-1 i
-0 j
-0 J
-10 M
-1 w
-/DeviceGray {} cs
-[0] sc
-/DeviceGray {} CS
-[0] SC
-false op
-false OP
-{} settransfer
-0 0 612 792 re
-W
-q
-q
-[0.1 0 0 0.1 0 0] cm
-q
-180 3960 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 738.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/ide.c  Page 3) 157.2665 Tj
-0 -28.4801 Td
-(3400 // Interrupt handler.) 113.5814 Tj
-0 -37.9735 Td
-(3401 void) 39.3166 Tj
-0 -47.4668 Td
-(3402 ideintr\(void\)) 78.6333 Tj
-0 -56.9602 Td
-(3403 {) 26.2111 Tj
-0 -66.4535 Td
-(3404   struct buf *b;) 91.7388 Tj
-0 -75.9469 Td
-(3405 ) 21.8426 Tj
-0 -85.4403 Td
-(3406   // Take first buffer off queue.) 166.0035 Tj
-0 -94.9336 Td
-(3407   acquire\(&idelock\);) 109.2129 Tj
-0 -104.427 Td
-(3408   if\(\(b = idequeue\) == 0\){) 135.4239 Tj
-0 -113.9203 Td
-(3409     release\(&idelock\);) 117.9499 Tj
-0 -123.4137 Td
-(3410     cprintf\("Spurious IDE interrupt.\\n"\);) 200.9517 Tj
-0 -132.9071 Td
-(3411     return;) 69.8962 Tj
-0 -142.4004 Td
-(3412   }) 34.9481 Tj
-0 -151.8938 Td
-(3413   idequeue = b->qnext;) 117.9499 Tj
-0 -161.3871 Td
-(3414 ) 21.8426 Tj
-0 -170.8805 Td
-(3415   // Read data if needed.) 131.0554 Tj
-0 -180.3739 Td
-(3416   if\(!\(b->flags & B_DIRTY\) && idewait\(1\) >= 0\)) 222.7942 Tj
-0 -189.8672 Td
-(3417     insl\(0x1f0, b->data, 512/4\);) 161.635 Tj
-0 -199.3606 Td
-(3418 ) 21.8426 Tj
-0 -208.8539 Td
-(3419   // Wake process waiting for this buf.) 192.2146 Tj
-0 -218.3473 Td
-(3420   b->flags |= B_VALID;) 117.9499 Tj
-0 -227.8407 Td
-(3421   b->flags &= ~B_DIRTY;) 122.3184 Tj
-0 -237.334 Td
-(3422   wakeup\(b\);) 74.2647 Tj
-0 -246.8274 Td
-(3423 ) 21.8426 Tj
-0 -256.3207 Td
-(3424   // Start disk on next buf in queue.) 183.4776 Tj
-0 -265.8141 Td
-(3425   if\(idequeue != 0\)) 104.8443 Tj
-0 -275.3075 Td
-(3426     idestart\(idequeue\);) 122.3184 Tj
-0 -284.8008 Td
-(3427 ) 21.8426 Tj
-0 -294.2942 Td
-(3428   release\(&idelock\);) 109.2129 Tj
-0 -303.7875 Td
-(3429 }) 26.2111 Tj
-0 -313.2809 Td
-(3430 ) 21.8426 Tj
-0 -322.7743 Td
-(3431 ) 21.8426 Tj
-0 -332.2676 Td
-(3432 ) 21.8426 Tj
-0 -341.761 Td
-(3433 ) 21.8426 Tj
-0 -351.2543 Td
-(3434 ) 21.8426 Tj
-0 -360.7477 Td
-(3435 ) 21.8426 Tj
-0 -370.2411 Td
-(3436 ) 21.8426 Tj
-0 -379.7344 Td
-(3437 ) 21.8426 Tj
-0 -389.2278 Td
-(3438 ) 21.8426 Tj
-0 -398.7211 Td
-(3439 ) 21.8426 Tj
-0 -408.2145 Td
-(3440 ) 21.8426 Tj
-0 -417.7079 Td
-(3441 ) 21.8426 Tj
-0 -427.2012 Td
-(3442 ) 21.8426 Tj
-0 -436.6946 Td
-(3443 ) 21.8426 Tj
-0 -446.1879 Td
-(3444 ) 21.8426 Tj
-0 -455.6813 Td
-(3445 ) 21.8426 Tj
-0 -465.1747 Td
-(3446 ) 21.8426 Tj
-0 -474.668 Td
-(3447 ) 21.8426 Tj
-0 -484.1614 Td
-(3448 ) 21.8426 Tj
-0 -493.6547 Td
-(3449 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 34) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/ide.c  Page 4) 157.2665 Tj
-0 -28.4801 Td
-(3450 // Sync buf with disk.) 117.9499 Tj
-0 -37.9735 Td
-(3451 // If B_DIRTY is set, write buf to disk, clear B_DIRTY, se\
-t B_VALID.) 318.9016 Tj
-0 -47.4668 Td
-(3452 // Else if B_VALID is not set, read buf from disk, set B_V\
-ALID.) 297.059 Tj
-0 -56.9602 Td
-(3453 void) 39.3166 Tj
-0 -66.4535 Td
-(3454 iderw\(struct buf *b\)) 109.2129 Tj
-0 -75.9469 Td
-(3455 {) 26.2111 Tj
-0 -85.4403 Td
-(3456   struct buf **pp;) 100.4758 Tj
-0 -94.9336 Td
-(3457 ) 21.8426 Tj
-0 -104.427 Td
-(3458   if\(!\(b->flags & B_BUSY\)\)) 135.4239 Tj
-0 -113.9203 Td
-(3459     panic\("iderw: buf not busy"\);) 166.0035 Tj
-0 -123.4137 Td
-(3460   if\(\(b->flags & \(B_VALID|B_DIRTY\)\) == B_VALID\)) 227.1628 Tj
-0 -132.9071 Td
-(3461     panic\("iderw: nothing to do"\);) 170.3721 Tj
-0 -142.4004 Td
-(3462   if\(b->dev != 0 && !havedisk1\)) 157.2665 Tj
-0 -151.8938 Td
-(3463     panic\("idrw: ide disk 1 not present"\);) 205.3202 Tj
-0 -161.3871 Td
-(3464 ) 21.8426 Tj
-0 -170.8805 Td
-(3465   acquire\(&idelock\);) 109.2129 Tj
-0 -180.3739 Td
-(3466 ) 21.8426 Tj
-0 -189.8672 Td
-(3467   // Append b to idequeue.) 135.4239 Tj
-0 -199.3606 Td
-(3468   b->qnext = 0;) 87.3703 Tj
-0 -208.8539 Td
-(3469   for\(pp=&idequeue; *pp; pp=&\(*pp\)->qnext\)) 205.3202 Tj
-0 -218.3473 Td
-(3470     ;) 43.6851 Tj
-0 -227.8407 Td
-(3471   *pp = b;) 65.5277 Tj
-0 -237.334 Td
-(3472 ) 21.8426 Tj
-0 -246.8274 Td
-(3473   // Start disk if necessary.) 148.5295 Tj
-0 -256.3207 Td
-(3474   if\(idequeue == b\)) 104.8443 Tj
-0 -265.8141 Td
-(3475     idestart\(b\);) 91.7388 Tj
-0 -275.3075 Td
-(3476 ) 21.8426 Tj
-0 -284.8008 Td
-(3477   // Wait for request to finish.) 161.635 Tj
-0 -294.2942 Td
-(3478   // Assuming will not sleep too long: ignore proc->killed\
-.) 279.5849 Tj
-0 -303.7875 Td
-(3479   while\(\(b->flags & \(B_VALID|B_DIRTY\)\) != B_VALID\)) 240.2683 Tj
-0 -313.2809 Td
-(3480     sleep\(b, &idelock\);) 122.3184 Tj
-0 -322.7743 Td
-(3481 ) 21.8426 Tj
-0 -332.2676 Td
-(3482   release\(&idelock\);) 109.2129 Tj
-0 -341.761 Td
-(3483 }) 26.2111 Tj
-0 -351.2543 Td
-(3484 ) 21.8426 Tj
-0 -360.7477 Td
-(3485 ) 21.8426 Tj
-0 -370.2411 Td
-(3486 ) 21.8426 Tj
-0 -379.7344 Td
-(3487 ) 21.8426 Tj
-0 -389.2278 Td
-(3488 ) 21.8426 Tj
-0 -398.7211 Td
-(3489 ) 21.8426 Tj
-0 -408.2145 Td
-(3490 ) 21.8426 Tj
-0 -417.7079 Td
-(3491 ) 21.8426 Tj
-0 -427.2012 Td
-(3492 ) 21.8426 Tj
-0 -436.6946 Td
-(3493 ) 21.8426 Tj
-0 -446.1879 Td
-(3494 ) 21.8426 Tj
-0 -455.6813 Td
-(3495 ) 21.8426 Tj
-0 -465.1747 Td
-(3496 ) 21.8426 Tj
-0 -474.668 Td
-(3497 ) 21.8426 Tj
-0 -484.1614 Td
-(3498 ) 21.8426 Tj
-0 -493.6547 Td
-(3499 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 34) 34.9481 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
-%%Page: 42 42
-%%BeginPageSetup
-%%PageOrientation: Landscape
-pdfStartPage
-180 rotate
--612 -792 translate
-0 0 612 792 re W
-%%EndPageSetup
-[] 0 d
-1 i
-0 j
-0 J
-10 M
-1 w
-/DeviceGray {} cs
-[0] sc
-/DeviceGray {} CS
-[0] SC
-false op
-false OP
-{} settransfer
-0 0 612 792 re
-W
-q
-q
-[0.1 0 0 0.1 0 0] cm
-q
-180 3960 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 738.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/bio.c  Page 1) 157.2665 Tj
-0 -28.4801 Td
-(3500 // Buffer cache.) 91.7388 Tj
-0 -37.9735 Td
-(3501 //) 30.5796 Tj
-0 -47.4668 Td
-(3502 // The buffer cache is a linked list of buf structures hol\
-ding) 292.6905 Tj
-0 -56.9602 Td
-(3503 // cached copies of disk block contents.  Caching disk blo\
-cks) 288.322 Tj
-0 -66.4535 Td
-(3504 // in memory reduces the number of disk reads and also pro\
-vides) 297.059 Tj
-0 -75.9469 Td
-(3505 // a synchronization point for disk blocks used by multipl\
-e processes.) 327.6386 Tj
-0 -85.4403 Td
-(3506 //) 30.5796 Tj
-0 -94.9336 Td
-(3507 // Interface:) 78.6333 Tj
-0 -104.427 Td
-(3508 // * To get a buffer for a particular disk block, call bre\
-ad.) 288.322 Tj
-0 -113.9203 Td
-(3509 // * After changing buffer data, call bwrite to flush it t\
-o disk.) 305.796 Tj
-0 -123.4137 Td
-(3510 // * When done with the buffer, call brelse.) 214.0572 Tj
-0 -132.9071 Td
-(3511 // * Do not use the buffer after calling brelse.) 231.5313 Tj
-0 -142.4004 Td
-(3512 // * Only one process at a time can use a buffer,) 235.8998 Tj
-0 -151.8938 Td
-(3513 //     so do not keep them longer than necessary.) 235.8998 Tj
-0 -161.3871 Td
-(3514 //) 30.5796 Tj
-0 -170.8805 Td
-(3515 // The implementation uses three state flags internally:) 266.4794 Tj
-0 -180.3739 Td
-(3516 // * B_BUSY: the block has been returned from bread) 244.6368 Tj
-0 -189.8672 Td
-(3517 //     and has not been passed back to brelse.) 222.7942 Tj
-0 -199.3606 Td
-(3518 // * B_VALID: the buffer data has been initialized) 240.2683 Tj
-0 -208.8539 Td
-(3519 //     with the associated disk block contents.) 227.1628 Tj
-0 -218.3473 Td
-(3520 // * B_DIRTY: the buffer data has been modified) 227.1628 Tj
-0 -227.8407 Td
-(3521 //     and needs to be written to disk.) 192.2146 Tj
-0 -237.334 Td
-(3522 ) 21.8426 Tj
-0 -246.8274 Td
-(3523 #include "types.h") 100.4758 Tj
-0 -256.3207 Td
-(3524 #include "defs.h") 96.1073 Tj
-0 -265.8141 Td
-(3525 #include "param.h") 100.4758 Tj
-0 -275.3075 Td
-(3526 #include "spinlock.h") 113.5814 Tj
-0 -284.8008 Td
-(3527 #include "buf.h") 91.7388 Tj
-0 -294.2942 Td
-(3528 ) 21.8426 Tj
-0 -303.7875 Td
-(3529 struct {) 56.7907 Tj
-0 -313.2809 Td
-(3530   struct spinlock lock;) 122.3184 Tj
-0 -322.7743 Td
-(3531   struct buf buf[NBUF];) 122.3184 Tj
-0 -332.2676 Td
-(3532 ) 21.8426 Tj
-0 -341.761 Td
-(3533   // Linked list of all buffers, through prev/next.) 244.6368 Tj
-0 -351.2543 Td
-(3534   // head.next is most recently used.) 183.4776 Tj
-0 -360.7477 Td
-(3535   struct buf head;) 100.4758 Tj
-0 -370.2411 Td
-(3536 } bcache;) 61.1592 Tj
-0 -379.7344 Td
-(3537 ) 21.8426 Tj
-0 -389.2278 Td
-(3538 void) 39.3166 Tj
-0 -398.7211 Td
-(3539 binit\(void\)) 69.8962 Tj
-0 -408.2145 Td
-(3540 {) 26.2111 Tj
-0 -417.7079 Td
-(3541   struct buf *b;) 91.7388 Tj
-0 -427.2012 Td
-(3542 ) 21.8426 Tj
-0 -436.6946 Td
-(3543   initlock\(&bcache.lock, "bcache"\);) 174.7406 Tj
-0 -446.1879 Td
-(3544 ) 21.8426 Tj
-0 -455.6813 Td
-(3545 ) 21.8426 Tj
-0 -465.1747 Td
-(3546 ) 21.8426 Tj
-0 -474.668 Td
-(3547 ) 21.8426 Tj
-0 -484.1614 Td
-(3548 ) 21.8426 Tj
-0 -493.6547 Td
-(3549 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 35) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/bio.c  Page 2) 157.2665 Tj
-0 -28.4801 Td
-(3550   // Create linked list of buffers) 170.3721 Tj
-0 -37.9735 Td
-(3551   bcache.head.prev = &bcache.head;) 170.3721 Tj
-0 -47.4668 Td
-(3552   bcache.head.next = &bcache.head;) 170.3721 Tj
-0 -56.9602 Td
-(3553   for\(b = bcache.buf; b < bcache.buf+NBUF; b++\){) 231.5313 Tj
-0 -66.4535 Td
-(3554     b->next = bcache.head.next;) 157.2665 Tj
-0 -75.9469 Td
-(3555     b->prev = &bcache.head;) 139.7925 Tj
-0 -85.4403 Td
-(3556     b->dev = -1;) 91.7388 Tj
-0 -94.9336 Td
-(3557     bcache.head.next->prev = b;) 157.2665 Tj
-0 -104.427 Td
-(3558     bcache.head.next = b;) 131.0554 Tj
-0 -113.9203 Td
-(3559   }) 34.9481 Tj
-0 -123.4137 Td
-(3560 }) 26.2111 Tj
-0 -132.9071 Td
-(3561 ) 21.8426 Tj
-0 -142.4004 Td
-(3562 // Look through buffer cache for sector on device dev.) 257.7424 Tj
-0 -151.8938 Td
-(3563 // If not found, allocate fresh block.) 187.8461 Tj
-0 -161.3871 Td
-(3564 // In either case, return locked buffer.) 196.5831 Tj
-0 -170.8805 Td
-(3565 static struct buf*) 100.4758 Tj
-0 -180.3739 Td
-(3566 bget\(uint dev, uint sector\)) 139.7925 Tj
-0 -189.8672 Td
-(3567 {) 26.2111 Tj
-0 -199.3606 Td
-(3568   struct buf *b;) 91.7388 Tj
-0 -208.8539 Td
-(3569 ) 21.8426 Tj
-0 -218.3473 Td
-(3570   acquire\(&bcache.lock\);) 126.6869 Tj
-0 -227.8407 Td
-(3571 ) 21.8426 Tj
-0 -237.334 Td
-(3572  loop:) 48.0537 Tj
-0 -246.8274 Td
-(3573   // Try for cached block.) 135.4239 Tj
-0 -256.3207 Td
-(3574   for\(b = bcache.head.next; b != &bcache.head; b = b->nex\
-t\){) 283.9534 Tj
-0 -265.8141 Td
-(3575     if\(b->dev == dev && b->sector == sector\){) 218.4257 Tj
-0 -275.3075 Td
-(3576       if\(!\(b->flags & B_BUSY\)\){) 157.2665 Tj
-0 -284.8008 Td
-(3577         b->flags |= B_BUSY;) 139.7925 Tj
-0 -294.2942 Td
-(3578         release\(&bcache.lock\);) 152.898 Tj
-0 -303.7875 Td
-(3579         return b;) 96.1073 Tj
-0 -313.2809 Td
-(3580       }) 52.4222 Tj
-0 -322.7743 Td
-(3581       sleep\(b, &bcache.lock\);) 148.5295 Tj
-0 -332.2676 Td
-(3582       goto loop;) 91.7388 Tj
-0 -341.761 Td
-(3583     }) 43.6851 Tj
-0 -351.2543 Td
-(3584   }) 34.9481 Tj
-0 -360.7477 Td
-(3585 ) 21.8426 Tj
-0 -370.2411 Td
-(3586   // Allocate fresh block.) 135.4239 Tj
-0 -379.7344 Td
-(3587   for\(b = bcache.head.prev; b != &bcache.head; b = b->pre\
-v\){) 283.9534 Tj
-0 -389.2278 Td
-(3588     if\(\(b->flags & B_BUSY\) == 0\){) 166.0035 Tj
-0 -398.7211 Td
-(3589       b->dev = dev;) 104.8443 Tj
-0 -408.2145 Td
-(3590       b->sector = sector;) 131.0554 Tj
-0 -417.7079 Td
-(3591       b->flags = B_BUSY;) 126.6869 Tj
-0 -427.2012 Td
-(3592       release\(&bcache.lock\);) 144.161 Tj
-0 -436.6946 Td
-(3593       return b;) 87.3703 Tj
-0 -446.1879 Td
-(3594     }) 43.6851 Tj
-0 -455.6813 Td
-(3595   }) 34.9481 Tj
-0 -465.1747 Td
-(3596   panic\("bget: no buffers"\);) 144.161 Tj
-0 -474.668 Td
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-(3598 ) 21.8426 Tj
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-(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
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-(3648 ) 21.8426 Tj
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-(3649 ) 21.8426 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 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
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-(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
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-(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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-(Sep  3 00:44 2009  xv6/fs.c  Page 4) 152.898 Tj
-0 -28.4801 Td
-(3800 // Allocate a new inode with the given type on device dev.) 275.2164 Tj
-0 -37.9735 Td
-(3801 struct inode*) 78.6333 Tj
-0 -47.4668 Td
-(3802 ialloc\(uint dev, short type\)) 144.161 Tj
-0 -56.9602 Td
-(3803 {) 26.2111 Tj
-0 -66.4535 Td
-(3804   int inum;) 69.8962 Tj
-0 -75.9469 Td
-(3805   struct buf *bp;) 96.1073 Tj
-0 -85.4403 Td
-(3806   struct dinode *dip;) 113.5814 Tj
-0 -94.9336 Td
-(3807   struct superblock sb;) 122.3184 Tj
-0 -104.427 Td
-(3808 ) 21.8426 Tj
-0 -113.9203 Td
-(3809   readsb\(dev, &sb\);) 104.8443 Tj
-0 -123.4137 Td
-(3810   for\(inum = 1; inum < sb.ninodes; inum++\){  // loop ove\
-r inode blocks) 327.6386 Tj
-0 -132.9071 Td
-(3811     bp = bread\(dev, IBLOCK\(inum\)\);) 170.3721 Tj
-0 -142.4004 Td
-(3812     dip = \(struct dinode*\)bp->data + inum%IPB;) 222.7942 Tj
-0 -151.8938 Td
-(3813     if\(dip->type == 0\){  // a free inode) 196.5831 Tj
-0 -161.3871 Td
-(3814       memset\(dip, 0, sizeof\(*dip\)\);) 174.7406 Tj
-0 -170.8805 Td
-(3815       dip->type = type;) 122.3184 Tj
-0 -180.3739 Td
-(3816       bwrite\(bp\);   // mark it allocated on the disk) 249.0053 Tj
-0 -189.8672 Td
-(3817       brelse\(bp\);) 96.1073 Tj
-0 -199.3606 Td
-(3818       return iget\(dev, inum\);) 148.5295 Tj
-0 -208.8539 Td
-(3819     }) 43.6851 Tj
-0 -218.3473 Td
-(3820     brelse\(bp\);) 87.3703 Tj
-0 -227.8407 Td
-(3821   }) 34.9481 Tj
-0 -237.334 Td
-(3822   panic\("ialloc: no inodes"\);) 148.5295 Tj
-0 -246.8274 Td
-(3823 }) 26.2111 Tj
-0 -256.3207 Td
-(3824 ) 21.8426 Tj
-0 -265.8141 Td
-(3825 // Copy inode, which has changed, from memory to disk.) 257.7424 Tj
-0 -275.3075 Td
-(3826 void) 39.3166 Tj
-0 -284.8008 Td
-(3827 iupdate\(struct inode *ip\)) 131.0554 Tj
-0 -294.2942 Td
-(3828 {) 26.2111 Tj
-0 -303.7875 Td
-(3829   struct buf *bp;) 96.1073 Tj
-0 -313.2809 Td
-(3830   struct dinode *dip;) 113.5814 Tj
-0 -322.7743 Td
-(3831 ) 21.8426 Tj
-0 -332.2676 Td
-(3832   bp = bread\(ip->dev, IBLOCK\(ip->inum\)\);) 196.5831 Tj
-0 -341.761 Td
-(3833   dip = \(struct dinode*\)bp->data + ip->inum%IPB;) 231.5313 Tj
-0 -351.2543 Td
-(3834   dip->type = ip->type;) 122.3184 Tj
-0 -360.7477 Td
-(3835   dip->major = ip->major;) 131.0554 Tj
-0 -370.2411 Td
-(3836   dip->minor = ip->minor;) 131.0554 Tj
-0 -379.7344 Td
-(3837   dip->nlink = ip->nlink;) 131.0554 Tj
-0 -389.2278 Td
-(3838   dip->size = ip->size;) 122.3184 Tj
-0 -398.7211 Td
-(3839   memmove\(dip->addrs, ip->addrs, sizeof\(ip->addrs\)\);) 249.0053 Tj
-0 -408.2145 Td
-(3840   bwrite\(bp\);) 78.6333 Tj
-0 -417.7079 Td
-(3841   brelse\(bp\);) 78.6333 Tj
-0 -427.2012 Td
-(3842 }) 26.2111 Tj
-0 -436.6946 Td
-(3843 ) 21.8426 Tj
-0 -446.1879 Td
-(3844 ) 21.8426 Tj
-0 -455.6813 Td
-(3845 ) 21.8426 Tj
-0 -465.1747 Td
-(3846 ) 21.8426 Tj
-0 -474.668 Td
-(3847 ) 21.8426 Tj
-0 -484.1614 Td
-(3848 ) 21.8426 Tj
-0 -493.6547 Td
-(3849 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 38) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/fs.c  Page 5) 152.898 Tj
-0 -28.4801 Td
-(3850 // Find the inode with number inum on device dev) 231.5313 Tj
-0 -37.9735 Td
-(3851 // and return the in-memory copy.) 166.0035 Tj
-0 -47.4668 Td
-(3852 static struct inode*) 109.2129 Tj
-0 -56.9602 Td
-(3853 iget\(uint dev, uint inum\)) 131.0554 Tj
-0 -66.4535 Td
-(3854 {) 26.2111 Tj
-0 -75.9469 Td
-(3855   struct inode *ip, *empty;) 139.7925 Tj
-0 -85.4403 Td
-(3856 ) 21.8426 Tj
-0 -94.9336 Td
-(3857   acquire\(&icache.lock\);) 126.6869 Tj
-0 -104.427 Td
-(3858 ) 21.8426 Tj
-0 -113.9203 Td
-(3859   // Try for cached inode.) 135.4239 Tj
-0 -123.4137 Td
-(3860   empty = 0;) 74.2647 Tj
-0 -132.9071 Td
-(3861   for\(ip = &icache.inode[0]; ip < &icache.inode[NINODE]; \
-ip++\){) 297.059 Tj
-0 -142.4004 Td
-(3862     if\(ip->ref > 0 && ip->dev == dev && ip->inum == inum\)\
-{) 275.2164 Tj
-0 -151.8938 Td
-(3863       ip->ref++;) 91.7388 Tj
-0 -161.3871 Td
-(3864       release\(&icache.lock\);) 144.161 Tj
-0 -170.8805 Td
-(3865       return ip;) 91.7388 Tj
-0 -180.3739 Td
-(3866     }) 43.6851 Tj
-0 -189.8672 Td
-(3867     if\(empty == 0 && ip->ref == 0\)    // Remember empty \
-slot.) 288.322 Tj
-0 -199.3606 Td
-(3868       empty = ip;) 96.1073 Tj
-0 -208.8539 Td
-(3869   }) 34.9481 Tj
-0 -218.3473 Td
-(3870 ) 21.8426 Tj
-0 -227.8407 Td
-(3871   // Allocate fresh inode.) 135.4239 Tj
-0 -237.334 Td
-(3872   if\(empty == 0\)) 91.7388 Tj
-0 -246.8274 Td
-(3873     panic\("iget: no inodes"\);) 148.5295 Tj
-0 -256.3207 Td
-(3874 ) 21.8426 Tj
-0 -265.8141 Td
-(3875   ip = empty;) 78.6333 Tj
-0 -275.3075 Td
-(3876   ip->dev = dev;) 91.7388 Tj
-0 -284.8008 Td
-(3877   ip->inum = inum;) 100.4758 Tj
-0 -294.2942 Td
-(3878   ip->ref = 1;) 83.0018 Tj
-0 -303.7875 Td
-(3879   ip->flags = 0;) 91.7388 Tj
-0 -313.2809 Td
-(3880   release\(&icache.lock\);) 126.6869 Tj
-0 -322.7743 Td
-(3881 ) 21.8426 Tj
-0 -332.2676 Td
-(3882   return ip;) 74.2647 Tj
-0 -341.761 Td
-(3883 }) 26.2111 Tj
-0 -351.2543 Td
-(3884 ) 21.8426 Tj
-0 -360.7477 Td
-(3885 // Increment reference count for ip.) 179.1091 Tj
-0 -370.2411 Td
-(3886 // Returns ip to enable ip = idup\(ip1\) idiom.) 218.4257 Tj
-0 -379.7344 Td
-(3887 struct inode*) 78.6333 Tj
-0 -389.2278 Td
-(3888 idup\(struct inode *ip\)) 117.9499 Tj
-0 -398.7211 Td
-(3889 {) 26.2111 Tj
-0 -408.2145 Td
-(3890   acquire\(&icache.lock\);) 126.6869 Tj
-0 -417.7079 Td
-(3891   ip->ref++;) 74.2647 Tj
-0 -427.2012 Td
-(3892   release\(&icache.lock\);) 126.6869 Tj
-0 -436.6946 Td
-(3893   return ip;) 74.2647 Tj
-0 -446.1879 Td
-(3894 }) 26.2111 Tj
-0 -455.6813 Td
-(3895 ) 21.8426 Tj
-0 -465.1747 Td
-(3896 ) 21.8426 Tj
-0 -474.668 Td
-(3897 ) 21.8426 Tj
-0 -484.1614 Td
-(3898 ) 21.8426 Tj
-0 -493.6547 Td
-(3899 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 38) 34.9481 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
-%%Page: 46 46
-%%BeginPageSetup
-%%PageOrientation: Landscape
-pdfStartPage
-180 rotate
--612 -792 translate
-0 0 612 792 re W
-%%EndPageSetup
-[] 0 d
-1 i
-0 j
-0 J
-10 M
-1 w
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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/fs.c  Page 6) 152.898 Tj
-0 -28.4801 Td
-(3900 // Lock the given inode.) 126.6869 Tj
-0 -37.9735 Td
-(3901 void) 39.3166 Tj
-0 -47.4668 Td
-(3902 ilock\(struct inode *ip\)) 122.3184 Tj
-0 -56.9602 Td
-(3903 {) 26.2111 Tj
-0 -66.4535 Td
-(3904   struct buf *bp;) 96.1073 Tj
-0 -75.9469 Td
-(3905   struct dinode *dip;) 113.5814 Tj
-0 -85.4403 Td
-(3906 ) 21.8426 Tj
-0 -94.9336 Td
-(3907   if\(ip == 0 || ip->ref < 1\)) 144.161 Tj
-0 -104.427 Td
-(3908     panic\("ilock"\);) 104.8443 Tj
-0 -113.9203 Td
-(3909 ) 21.8426 Tj
-0 -123.4137 Td
-(3910   acquire\(&icache.lock\);) 126.6869 Tj
-0 -132.9071 Td
-(3911   while\(ip->flags & I_BUSY\)) 139.7925 Tj
-0 -142.4004 Td
-(3912     sleep\(ip, &icache.lock\);) 144.161 Tj
-0 -151.8938 Td
-(3913   ip->flags |= I_BUSY;) 117.9499 Tj
-0 -161.3871 Td
-(3914   release\(&icache.lock\);) 126.6869 Tj
-0 -170.8805 Td
-(3915 ) 21.8426 Tj
-0 -180.3739 Td
-(3916   if\(!\(ip->flags & I_VALID\)\){) 148.5295 Tj
-0 -189.8672 Td
-(3917     bp = bread\(ip->dev, IBLOCK\(ip->inum\)\);) 205.3202 Tj
-0 -199.3606 Td
-(3918     dip = \(struct dinode*\)bp->data + ip->inum%IPB;) 240.2683 Tj
-0 -208.8539 Td
-(3919     ip->type = dip->type;) 131.0554 Tj
-0 -218.3473 Td
-(3920     ip->major = dip->major;) 139.7925 Tj
-0 -227.8407 Td
-(3921     ip->minor = dip->minor;) 139.7925 Tj
-0 -237.334 Td
-(3922     ip->nlink = dip->nlink;) 139.7925 Tj
-0 -246.8274 Td
-(3923     ip->size = dip->size;) 131.0554 Tj
-0 -256.3207 Td
-(3924     memmove\(ip->addrs, dip->addrs, sizeof\(ip->addrs\)\);) 257.7424 Tj
-0 -265.8141 Td
-(3925     brelse\(bp\);) 87.3703 Tj
-0 -275.3075 Td
-(3926     ip->flags |= I_VALID;) 131.0554 Tj
-0 -284.8008 Td
-(3927     if\(ip->type == 0\)) 113.5814 Tj
-0 -294.2942 Td
-(3928       panic\("ilock: no type"\);) 152.898 Tj
-0 -303.7875 Td
-(3929   }) 34.9481 Tj
-0 -313.2809 Td
-(3930 }) 26.2111 Tj
-0 -322.7743 Td
-(3931 ) 21.8426 Tj
-0 -332.2676 Td
-(3932 // Unlock the given inode.) 135.4239 Tj
-0 -341.761 Td
-(3933 void) 39.3166 Tj
-0 -351.2543 Td
-(3934 iunlock\(struct inode *ip\)) 131.0554 Tj
-0 -360.7477 Td
-(3935 {) 26.2111 Tj
-0 -370.2411 Td
-(3936   if\(ip == 0 || !\(ip->flags & I_BUSY\) || ip->ref < 1\)) 253.3738 Tj
-0 -379.7344 Td
-(3937     panic\("iunlock"\);) 113.5814 Tj
-0 -389.2278 Td
-(3938 ) 21.8426 Tj
-0 -398.7211 Td
-(3939   acquire\(&icache.lock\);) 126.6869 Tj
-0 -408.2145 Td
-(3940   ip->flags &= ~I_BUSY;) 122.3184 Tj
-0 -417.7079 Td
-(3941   wakeup\(ip\);) 78.6333 Tj
-0 -427.2012 Td
-(3942   release\(&icache.lock\);) 126.6869 Tj
-0 -436.6946 Td
-(3943 }) 26.2111 Tj
-0 -446.1879 Td
-(3944 ) 21.8426 Tj
-0 -455.6813 Td
-(3945 ) 21.8426 Tj
-0 -465.1747 Td
-(3946 ) 21.8426 Tj
-0 -474.668 Td
-(3947 ) 21.8426 Tj
-0 -484.1614 Td
-(3948 ) 21.8426 Tj
-0 -493.6547 Td
-(3949 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 39) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/fs.c  Page 7) 152.898 Tj
-0 -28.4801 Td
-(3950 // Caller holds reference to unlocked ip.  Drop reference.) 275.2164 Tj
-0 -37.9735 Td
-(3951 void) 39.3166 Tj
-0 -47.4668 Td
-(3952 iput\(struct inode *ip\)) 117.9499 Tj
-0 -56.9602 Td
-(3953 {) 26.2111 Tj
-0 -66.4535 Td
-(3954   acquire\(&icache.lock\);) 126.6869 Tj
-0 -75.9469 Td
-(3955   if\(ip->ref == 1 && \(ip->flags & I_VALID\) && ip->nlink\
- == 0\){) 292.6905 Tj
-0 -85.4403 Td
-(3956     // inode is no longer used: truncate and free inode.) 266.4794 Tj
-0 -94.9336 Td
-(3957     if\(ip->flags & I_BUSY\)) 135.4239 Tj
-0 -104.427 Td
-(3958       panic\("iput busy"\);) 131.0554 Tj
-0 -113.9203 Td
-(3959     ip->flags |= I_BUSY;) 126.6869 Tj
-0 -123.4137 Td
-(3960     release\(&icache.lock\);) 135.4239 Tj
-0 -132.9071 Td
-(3961     itrunc\(ip\);) 87.3703 Tj
-0 -142.4004 Td
-(3962     ip->type = 0;) 96.1073 Tj
-0 -151.8938 Td
-(3963     iupdate\(ip\);) 91.7388 Tj
-0 -161.3871 Td
-(3964     acquire\(&icache.lock\);) 135.4239 Tj
-0 -170.8805 Td
-(3965     ip->flags = 0;) 100.4758 Tj
-0 -180.3739 Td
-(3966     wakeup\(ip\);) 87.3703 Tj
-0 -189.8672 Td
-(3967   }) 34.9481 Tj
-0 -199.3606 Td
-(3968   ip->ref--;) 74.2647 Tj
-0 -208.8539 Td
-(3969   release\(&icache.lock\);) 126.6869 Tj
-0 -218.3473 Td
-(3970 }) 26.2111 Tj
-0 -227.8407 Td
-(3971 ) 21.8426 Tj
-0 -237.334 Td
-(3972 // Common idiom: unlock, then put.) 170.3721 Tj
-0 -246.8274 Td
-(3973 void) 39.3166 Tj
-0 -256.3207 Td
-(3974 iunlockput\(struct inode *ip\)) 144.161 Tj
-0 -265.8141 Td
-(3975 {) 26.2111 Tj
-0 -275.3075 Td
-(3976   iunlock\(ip\);) 83.0018 Tj
-0 -284.8008 Td
-(3977   iput\(ip\);) 69.8962 Tj
-0 -294.2942 Td
-(3978 }) 26.2111 Tj
-0 -303.7875 Td
-(3979 ) 21.8426 Tj
-0 -313.2809 Td
-(3980 ) 21.8426 Tj
-0 -322.7743 Td
-(3981 ) 21.8426 Tj
-0 -332.2676 Td
-(3982 ) 21.8426 Tj
-0 -341.761 Td
-(3983 ) 21.8426 Tj
-0 -351.2543 Td
-(3984 ) 21.8426 Tj
-0 -360.7477 Td
-(3985 ) 21.8426 Tj
-0 -370.2411 Td
-(3986 ) 21.8426 Tj
-0 -379.7344 Td
-(3987 ) 21.8426 Tj
-0 -389.2278 Td
-(3988 ) 21.8426 Tj
-0 -398.7211 Td
-(3989 ) 21.8426 Tj
-0 -408.2145 Td
-(3990 ) 21.8426 Tj
-0 -417.7079 Td
-(3991 ) 21.8426 Tj
-0 -427.2012 Td
-(3992 ) 21.8426 Tj
-0 -436.6946 Td
-(3993 ) 21.8426 Tj
-0 -446.1879 Td
-(3994 ) 21.8426 Tj
-0 -455.6813 Td
-(3995 ) 21.8426 Tj
-0 -465.1747 Td
-(3996 ) 21.8426 Tj
-0 -474.668 Td
-(3997 ) 21.8426 Tj
-0 -484.1614 Td
-(3998 ) 21.8426 Tj
-0 -493.6547 Td
-(3999 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 39) 34.9481 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
-%%Page: 47 47
-%%BeginPageSetup
-%%PageOrientation: Landscape
-pdfStartPage
-180 rotate
--612 -792 translate
-0 0 612 792 re W
-%%EndPageSetup
-[] 0 d
-1 i
-0 j
-0 J
-10 M
-1 w
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-[0] sc
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-[0] SC
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-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
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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
-0 0 Td
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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
-0 -493.6547 Td
-(4049 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 40) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/fs.c  Page 9) 152.898 Tj
-0 -28.4801 Td
-(4050 // Truncate inode \(discard contents\).) 183.4776 Tj
-0 -37.9735 Td
-(4051 // Only called after the last dirent referring) 222.7942 Tj
-0 -47.4668 Td
-(4052 // to this inode has been erased on disk.) 200.9517 Tj
-0 -56.9602 Td
-(4053 static void) 69.8962 Tj
-0 -66.4535 Td
-(4054 itrunc\(struct inode *ip\)) 126.6869 Tj
-0 -75.9469 Td
-(4055 {) 26.2111 Tj
-0 -85.4403 Td
-(4056   int i, j;) 69.8962 Tj
-0 -94.9336 Td
-(4057   struct buf *bp;) 96.1073 Tj
-0 -104.427 Td
-(4058   uint *a;) 65.5277 Tj
-0 -113.9203 Td
-(4059 ) 21.8426 Tj
-0 -123.4137 Td
-(4060   for\(i = 0; i < NDIRECT; i++\){) 157.2665 Tj
-0 -132.9071 Td
-(4061     if\(ip->addrs[i]\){) 113.5814 Tj
-0 -142.4004 Td
-(4062       bfree\(ip->dev, ip->addrs[i]\);) 174.7406 Tj
-0 -151.8938 Td
-(4063       ip->addrs[i] = 0;) 122.3184 Tj
-0 -161.3871 Td
-(4064     }) 43.6851 Tj
-0 -170.8805 Td
-(4065   }) 34.9481 Tj
-0 -180.3739 Td
-(4066 ) 21.8426 Tj
-0 -189.8672 Td
-(4067   if\(ip->addrs[NDIRECT]\){) 131.0554 Tj
-0 -199.3606 Td
-(4068     bp = bread\(ip->dev, ip->addrs[NDIRECT]\);) 214.0572 Tj
-0 -208.8539 Td
-(4069     a = \(uint*\)bp->data;) 126.6869 Tj
-0 -218.3473 Td
-(4070     for\(j = 0; j < NINDIRECT; j++\){) 174.7406 Tj
-0 -227.8407 Td
-(4071       if\(a[j]\)) 83.0018 Tj
-0 -237.334 Td
-(4072         bfree\(ip->dev, a[j]\);) 148.5295 Tj
-0 -246.8274 Td
-(4073     }) 43.6851 Tj
-0 -256.3207 Td
-(4074     brelse\(bp\);) 87.3703 Tj
-0 -265.8141 Td
-(4075     bfree\(ip->dev, ip->addrs[NDIRECT]\);) 192.2146 Tj
-0 -275.3075 Td
-(4076     ip->addrs[NDIRECT] = 0;) 139.7925 Tj
-0 -284.8008 Td
-(4077   }) 34.9481 Tj
-0 -294.2942 Td
-(4078 ) 21.8426 Tj
-0 -303.7875 Td
-(4079   ip->size = 0;) 87.3703 Tj
-0 -313.2809 Td
-(4080   iupdate\(ip\);) 83.0018 Tj
-0 -322.7743 Td
-(4081 }) 26.2111 Tj
-0 -332.2676 Td
-(4082 ) 21.8426 Tj
-0 -341.761 Td
-(4083 // Copy stat information from inode.) 179.1091 Tj
-0 -351.2543 Td
-(4084 void) 39.3166 Tj
-0 -360.7477 Td
-(4085 stati\(struct inode *ip, struct stat *st\)) 196.5831 Tj
-0 -370.2411 Td
-(4086 {) 26.2111 Tj
-0 -379.7344 Td
-(4087   st->dev = ip->dev;) 109.2129 Tj
-0 -389.2278 Td
-(4088   st->ino = ip->inum;) 113.5814 Tj
-0 -398.7211 Td
-(4089   st->type = ip->type;) 117.9499 Tj
-0 -408.2145 Td
-(4090   st->nlink = ip->nlink;) 126.6869 Tj
-0 -417.7079 Td
-(4091   st->size = ip->size;) 117.9499 Tj
-0 -427.2012 Td
-(4092 }) 26.2111 Tj
-0 -436.6946 Td
-(4093 ) 21.8426 Tj
-0 -446.1879 Td
-(4094 ) 21.8426 Tj
-0 -455.6813 Td
-(4095 ) 21.8426 Tj
-0 -465.1747 Td
-(4096 ) 21.8426 Tj
-0 -474.668 Td
-(4097 ) 21.8426 Tj
-0 -484.1614 Td
-(4098 ) 21.8426 Tj
-0 -493.6547 Td
-(4099 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 40) 34.9481 Tj
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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
-0 -313.2809 Td
-(4130 ) 21.8426 Tj
-0 -322.7743 Td
-(4131 ) 21.8426 Tj
-0 -332.2676 Td
-(4132 ) 21.8426 Tj
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-(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
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-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 0 564.72 392.865] Tm
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-/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
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-(4184 ) 21.8426 Tj
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-(4188 ) 21.8426 Tj
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-(4189 ) 21.8426 Tj
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-(4190 ) 21.8426 Tj
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-(4191 ) 21.8426 Tj
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-(4194 ) 21.8426 Tj
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-(4195 ) 21.8426 Tj
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-(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
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-(Sheet 41) 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 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
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-/DeviceGray {} CS
-[0] SC
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-[10 0 0 10 0 0] cm
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-(Sep  3 00:44 2009  xv6/fs.c  Page 13) 157.2665 Tj
-0 -28.4801 Td
-(4250 // Write a new directory entry \(name, inum\) into the dir\
-ectory dp.) 310.1645 Tj
-0 -37.9735 Td
-(4251 int) 34.9481 Tj
-0 -47.4668 Td
-(4252 dirlink\(struct inode *dp, char *name, uint inum\)) 231.5313 Tj
-0 -56.9602 Td
-(4253 {) 26.2111 Tj
-0 -66.4535 Td
-(4254   int off;) 65.5277 Tj
-0 -75.9469 Td
-(4255   struct dirent de;) 104.8443 Tj
-0 -85.4403 Td
-(4256   struct inode *ip;) 104.8443 Tj
-0 -94.9336 Td
-(4257 ) 21.8426 Tj
-0 -104.427 Td
-(4258   // Check that name is not present.) 179.1091 Tj
-0 -113.9203 Td
-(4259   if\(\(ip = dirlookup\(dp, name, 0\)\) != 0\){) 200.9517 Tj
-0 -123.4137 Td
-(4260     iput\(ip\);) 78.6333 Tj
-0 -132.9071 Td
-(4261     return -1;) 83.0018 Tj
-0 -142.4004 Td
-(4262   }) 34.9481 Tj
-0 -151.8938 Td
-(4263 ) 21.8426 Tj
-0 -161.3871 Td
-(4264   // Look for an empty dirent.) 152.898 Tj
-0 -170.8805 Td
-(4265   for\(off = 0; off < dp->size; off += sizeof\(de\)\){) 240.2683 Tj
-0 -180.3739 Td
-(4266     if\(readi\(dp, \(char*\)&de, off, sizeof\(de\)\) != si\
-zeof\(de\)\)) 283.9534 Tj
-0 -189.8672 Td
-(4267       panic\("dirlink read"\);) 144.161 Tj
-0 -199.3606 Td
-(4268     if\(de.inum == 0\)) 109.2129 Tj
-0 -208.8539 Td
-(4269       break;) 74.2647 Tj
-0 -218.3473 Td
-(4270   }) 34.9481 Tj
-0 -227.8407 Td
-(4271 ) 21.8426 Tj
-0 -237.334 Td
-(4272   strncpy\(de.name, name, DIRSIZ\);) 166.0035 Tj
-0 -246.8274 Td
-(4273   de.inum = inum;) 96.1073 Tj
-0 -256.3207 Td
-(4274   if\(writei\(dp, \(char*\)&de, off, sizeof\(de\)\) != siz\
-eof\(de\)\)) 279.5849 Tj
-0 -265.8141 Td
-(4275     panic\("dirlink"\);) 113.5814 Tj
-0 -275.3075 Td
-(4276 ) 21.8426 Tj
-0 -284.8008 Td
-(4277   return 0;) 69.8962 Tj
-0 -294.2942 Td
-(4278 }) 26.2111 Tj
-0 -303.7875 Td
-(4279 ) 21.8426 Tj
-0 -313.2809 Td
-(4280 ) 21.8426 Tj
-0 -322.7743 Td
-(4281 ) 21.8426 Tj
-0 -332.2676 Td
-(4282 ) 21.8426 Tj
-0 -341.761 Td
-(4283 ) 21.8426 Tj
-0 -351.2543 Td
-(4284 ) 21.8426 Tj
-0 -360.7477 Td
-(4285 ) 21.8426 Tj
-0 -370.2411 Td
-(4286 ) 21.8426 Tj
-0 -379.7344 Td
-(4287 ) 21.8426 Tj
-0 -389.2278 Td
-(4288 ) 21.8426 Tj
-0 -398.7211 Td
-(4289 ) 21.8426 Tj
-0 -408.2145 Td
-(4290 ) 21.8426 Tj
-0 -417.7079 Td
-(4291 ) 21.8426 Tj
-0 -427.2012 Td
-(4292 ) 21.8426 Tj
-0 -436.6946 Td
-(4293 ) 21.8426 Tj
-0 -446.1879 Td
-(4294 ) 21.8426 Tj
-0 -455.6813 Td
-(4295 ) 21.8426 Tj
-0 -465.1747 Td
-(4296 ) 21.8426 Tj
-0 -474.668 Td
-(4297 ) 21.8426 Tj
-0 -484.1614 Td
-(4298 ) 21.8426 Tj
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-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
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-0 -75.9469 Td
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-(4306 // If no name to remove, return 0.) 170.3721 Tj
-0 -94.9336 Td
-(4307 //) 30.5796 Tj
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-(4308 // Examples:) 74.2647 Tj
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-(4311 //   skipelem\("a", name\) = "", setting name = "a") 235.8998 Tj
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-(4312 //   skipelem\("", name\) = skipelem\("////", name\) = 0) 249.0053 Tj
-0 -151.8938 Td
-(4313 //) 30.5796 Tj
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-(4324   s = path;) 69.8962 Tj
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-(4325   while\(*path != '/' && *path != 0\)) 174.7406 Tj
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-0 -284.8008 Td
-(4327   len = path - s;) 96.1073 Tj
-0 -294.2942 Td
-(4328   if\(len >= DIRSIZ\)) 104.8443 Tj
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-(4334   while\(*path == '/'\)) 113.5814 Tj
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-(4335     path++;) 69.8962 Tj
-0 -370.2411 Td
-(4336   return path;) 83.0018 Tj
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-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
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-(4358   if\(*path == '/'\)) 100.4758 Tj
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-0 -123.4137 Td
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-0 -132.9071 Td
-(4361     ip = idup\(proc->cwd\);) 131.0554 Tj
-0 -142.4004 Td
-(4362 ) 21.8426 Tj
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-0 -170.8805 Td
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-0 -208.8539 Td
-(4369     if\(nameiparent && *path == '\\0'\){) 183.4776 Tj
-0 -218.3473 Td
-(4370       // Stop one level early.) 152.898 Tj
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-0 -294.2942 Td
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-0 -313.2809 Td
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-0 -389.2278 Td
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-(4393 }) 26.2111 Tj
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-0 -455.6813 Td
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-0 -465.1747 Td
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-0 -474.668 Td
-(4397 {) 26.2111 Tj
-0 -484.1614 Td
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-0 -493.6547 Td
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-(4402 #include "param.h") 100.4758 Tj
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-(4406 ) 21.8426 Tj
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-0 -161.3871 Td
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-(4418 ) 21.8426 Tj
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-(4419 // Allocate a file structure.) 148.5295 Tj
-0 -218.3473 Td
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-0 -256.3207 Td
-(4424 ) 21.8426 Tj
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-0 -351.2543 Td
-(4434   return 0;) 69.8962 Tj
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-(4435 }) 26.2111 Tj
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-(4436 ) 21.8426 Tj
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-(4437 // Increment ref count for file f.) 170.3721 Tj
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-0 -398.7211 Td
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-0 -408.2145 Td
-(4440 {) 26.2111 Tj
-0 -417.7079 Td
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-0 -427.2012 Td
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-0 -436.6946 Td
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-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
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-(4448 ) 21.8426 Tj
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-(4449 ) 21.8426 Tj
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-0 -28.4801 Td
-(4450 // Close file f.  \(Decrement ref count, close when reache\
-s 0.\)) 292.6905 Tj
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-(4451 void) 39.3166 Tj
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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
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-(4484   return -1;) 74.2647 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
-(4502 fileread\(struct file *f, char *addr, int n\)) 209.6887 Tj
-0 -56.9602 Td
-(4503 {) 26.2111 Tj
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-(4504   int r;) 56.7907 Tj
-0 -75.9469 Td
-(4505 ) 21.8426 Tj
-0 -85.4403 Td
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-(4507     return -1;) 83.0018 Tj
-0 -104.427 Td
-(4508   if\(f->type == FD_PIPE\)) 126.6869 Tj
-0 -113.9203 Td
-(4509     return piperead\(f->pipe, addr, n\);) 187.8461 Tj
-0 -123.4137 Td
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-0 -132.9071 Td
-(4511     ilock\(f->ip\);) 96.1073 Tj
-0 -142.4004 Td
-(4512     if\(\(r = readi\(f->ip, addr, f->off, n\)\) > 0\)) 227.1628 Tj
-0 -151.8938 Td
-(4513       f->off += r;) 100.4758 Tj
-0 -161.3871 Td
-(4514     iunlock\(f->ip\);) 104.8443 Tj
-0 -170.8805 Td
-(4515     return r;) 78.6333 Tj
-0 -180.3739 Td
-(4516   }) 34.9481 Tj
-0 -189.8672 Td
-(4517   panic\("fileread"\);) 109.2129 Tj
-0 -199.3606 Td
-(4518 }) 26.2111 Tj
-0 -208.8539 Td
-(4519 ) 21.8426 Tj
-0 -218.3473 Td
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-0 -227.8407 Td
-(4521 int) 34.9481 Tj
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-0 -265.8141 Td
-(4525 ) 21.8426 Tj
-0 -275.3075 Td
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-0 -284.8008 Td
-(4527     return -1;) 83.0018 Tj
-0 -294.2942 Td
-(4528   if\(f->type == FD_PIPE\)) 126.6869 Tj
-0 -303.7875 Td
-(4529     return pipewrite\(f->pipe, addr, n\);) 192.2146 Tj
-0 -313.2809 Td
-(4530   if\(f->type == FD_INODE\){) 135.4239 Tj
-0 -322.7743 Td
-(4531     ilock\(f->ip\);) 96.1073 Tj
-0 -332.2676 Td
-(4532     if\(\(r = writei\(f->ip, addr, f->off, n\)\) > 0\)) 231.5313 Tj
-0 -341.761 Td
-(4533       f->off += r;) 100.4758 Tj
-0 -351.2543 Td
-(4534     iunlock\(f->ip\);) 104.8443 Tj
-0 -360.7477 Td
-(4535     return r;) 78.6333 Tj
-0 -370.2411 Td
-(4536   }) 34.9481 Tj
-0 -379.7344 Td
-(4537   panic\("filewrite"\);) 113.5814 Tj
-0 -389.2278 Td
-(4538 }) 26.2111 Tj
-0 -398.7211 Td
-(4539 ) 21.8426 Tj
-0 -408.2145 Td
-(4540 ) 21.8426 Tj
-0 -417.7079 Td
-(4541 ) 21.8426 Tj
-0 -427.2012 Td
-(4542 ) 21.8426 Tj
-0 -436.6946 Td
-(4543 ) 21.8426 Tj
-0 -446.1879 Td
-(4544 ) 21.8426 Tj
-0 -455.6813 Td
-(4545 ) 21.8426 Tj
-0 -465.1747 Td
-(4546 ) 21.8426 Tj
-0 -474.668 Td
-(4547 ) 21.8426 Tj
-0 -484.1614 Td
-(4548 ) 21.8426 Tj
-0 -493.6547 Td
-(4549 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 45) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/sysfile.c  Page 1) 174.7406 Tj
-0 -28.4801 Td
-(4550 #include "types.h") 100.4758 Tj
-0 -37.9735 Td
-(4551 #include "defs.h") 96.1073 Tj
-0 -47.4668 Td
-(4552 #include "param.h") 100.4758 Tj
-0 -56.9602 Td
-(4553 #include "stat.h") 96.1073 Tj
-0 -66.4535 Td
-(4554 #include "mmu.h") 91.7388 Tj
-0 -75.9469 Td
-(4555 #include "proc.h") 96.1073 Tj
-0 -85.4403 Td
-(4556 #include "fs.h") 87.3703 Tj
-0 -94.9336 Td
-(4557 #include "file.h") 96.1073 Tj
-0 -104.427 Td
-(4558 #include "fcntl.h") 100.4758 Tj
-0 -113.9203 Td
-(4559 ) 21.8426 Tj
-0 -123.4137 Td
-(4560 // Fetch the nth word-sized system call argument as a file\
- descriptor) 323.2701 Tj
-0 -132.9071 Td
-(4561 // and return both the descriptor and the corresponding st\
-ruct file.) 318.9016 Tj
-0 -142.4004 Td
-(4562 static int) 65.5277 Tj
-0 -151.8938 Td
-(4563 argfd\(int n, int *pfd, struct file **pf\)) 196.5831 Tj
-0 -161.3871 Td
-(4564 {) 26.2111 Tj
-0 -170.8805 Td
-(4565   int fd;) 61.1592 Tj
-0 -180.3739 Td
-(4566   struct file *f;) 96.1073 Tj
-0 -189.8672 Td
-(4567 ) 21.8426 Tj
-0 -199.3606 Td
-(4568   if\(argint\(n, &fd\) < 0\)) 126.6869 Tj
-0 -208.8539 Td
-(4569     return -1;) 83.0018 Tj
-0 -218.3473 Td
-(4570   if\(fd < 0 || fd >= NOFILE || \(f=proc->ofile[fd]\) == 0\
-\)) 266.4794 Tj
-0 -227.8407 Td
-(4571     return -1;) 83.0018 Tj
-0 -237.334 Td
-(4572   if\(pfd\)) 61.1592 Tj
-0 -246.8274 Td
-(4573     *pfd = fd;) 83.0018 Tj
-0 -256.3207 Td
-(4574   if\(pf\)) 56.7907 Tj
-0 -265.8141 Td
-(4575     *pf = f;) 74.2647 Tj
-0 -275.3075 Td
-(4576   return 0;) 69.8962 Tj
-0 -284.8008 Td
-(4577 }) 26.2111 Tj
-0 -294.2942 Td
-(4578 ) 21.8426 Tj
-0 -303.7875 Td
-(4579 // Allocate a file descriptor for the given file.) 235.8998 Tj
-0 -313.2809 Td
-(4580 // Takes over file reference from caller on success.) 249.0053 Tj
-0 -322.7743 Td
-(4581 static int) 65.5277 Tj
-0 -332.2676 Td
-(4582 fdalloc\(struct file *f\)) 122.3184 Tj
-0 -341.761 Td
-(4583 {) 26.2111 Tj
-0 -351.2543 Td
-(4584   int fd;) 61.1592 Tj
-0 -360.7477 Td
-(4585 ) 21.8426 Tj
-0 -370.2411 Td
-(4586   for\(fd = 0; fd < NOFILE; fd++\){) 166.0035 Tj
-0 -379.7344 Td
-(4587     if\(proc->ofile[fd] == 0\){) 148.5295 Tj
-0 -389.2278 Td
-(4588       proc->ofile[fd] = f;) 135.4239 Tj
-0 -398.7211 Td
-(4589       return fd;) 91.7388 Tj
-0 -408.2145 Td
-(4590     }) 43.6851 Tj
-0 -417.7079 Td
-(4591   }) 34.9481 Tj
-0 -427.2012 Td
-(4592   return -1;) 74.2647 Tj
-0 -436.6946 Td
-(4593 }) 26.2111 Tj
-0 -446.1879 Td
-(4594 ) 21.8426 Tj
-0 -455.6813 Td
-(4595 ) 21.8426 Tj
-0 -465.1747 Td
-(4596 ) 21.8426 Tj
-0 -474.668 Td
-(4597 ) 21.8426 Tj
-0 -484.1614 Td
-(4598 ) 21.8426 Tj
-0 -493.6547 Td
-(4599 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 45) 34.9481 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
-%%Page: 53 53
-%%BeginPageSetup
-%%PageOrientation: Landscape
-pdfStartPage
-180 rotate
--612 -792 translate
-0 0 612 792 re W
-%%EndPageSetup
-[] 0 d
-1 i
-0 j
-0 J
-10 M
-1 w
-/DeviceGray {} cs
-[0] sc
-/DeviceGray {} CS
-[0] SC
-false op
-false OP
-{} settransfer
-0 0 612 792 re
-W
-q
-q
-[0.1 0 0 0.1 0 0] cm
-q
-180 3960 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 738.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/sysfile.c  Page 2) 174.7406 Tj
-0 -28.4801 Td
-(4600 int) 34.9481 Tj
-0 -37.9735 Td
-(4601 sys_dup\(void\)) 78.6333 Tj
-0 -47.4668 Td
-(4602 {) 26.2111 Tj
-0 -56.9602 Td
-(4603   struct file *f;) 96.1073 Tj
-0 -66.4535 Td
-(4604   int fd;) 61.1592 Tj
-0 -75.9469 Td
-(4605 ) 21.8426 Tj
-0 -85.4403 Td
-(4606   if\(argfd\(0, 0, &f\) < 0\)) 131.0554 Tj
-0 -94.9336 Td
-(4607     return -1;) 83.0018 Tj
-0 -104.427 Td
-(4608   if\(\(fd=fdalloc\(f\)\) < 0\)) 131.0554 Tj
-0 -113.9203 Td
-(4609     return -1;) 83.0018 Tj
-0 -123.4137 Td
-(4610   filedup\(f\);) 78.6333 Tj
-0 -132.9071 Td
-(4611   return fd;) 74.2647 Tj
-0 -142.4004 Td
-(4612 }) 26.2111 Tj
-0 -151.8938 Td
-(4613 ) 21.8426 Tj
-0 -161.3871 Td
-(4614 int) 34.9481 Tj
-0 -170.8805 Td
-(4615 sys_read\(void\)) 83.0018 Tj
-0 -180.3739 Td
-(4616 {) 26.2111 Tj
-0 -189.8672 Td
-(4617   struct file *f;) 96.1073 Tj
-0 -199.3606 Td
-(4618   int n;) 56.7907 Tj
-0 -208.8539 Td
-(4619   char *p;) 65.5277 Tj
-0 -218.3473 Td
-(4620 ) 21.8426 Tj
-0 -227.8407 Td
-(4621   if\(argfd\(0, 0, &f\) < 0 || argint\(2, &n\) < 0 || argp\
-tr\(1, &p, n\) < 0\)) 327.6386 Tj
-0 -237.334 Td
-(4622     return -1;) 83.0018 Tj
-0 -246.8274 Td
-(4623   return fileread\(f, p, n\);) 139.7925 Tj
-0 -256.3207 Td
-(4624 }) 26.2111 Tj
-0 -265.8141 Td
-(4625 ) 21.8426 Tj
-0 -275.3075 Td
-(4626 int) 34.9481 Tj
-0 -284.8008 Td
-(4627 sys_write\(void\)) 87.3703 Tj
-0 -294.2942 Td
-(4628 {) 26.2111 Tj
-0 -303.7875 Td
-(4629   struct file *f;) 96.1073 Tj
-0 -313.2809 Td
-(4630   int n;) 56.7907 Tj
-0 -322.7743 Td
-(4631   char *p;) 65.5277 Tj
-0 -332.2676 Td
-(4632 ) 21.8426 Tj
-0 -341.761 Td
-(4633   if\(argfd\(0, 0, &f\) < 0 || argint\(2, &n\) < 0 || argp\
-tr\(1, &p, n\) < 0\)) 327.6386 Tj
-0 -351.2543 Td
-(4634     return -1;) 83.0018 Tj
-0 -360.7477 Td
-(4635   return filewrite\(f, p, n\);) 144.161 Tj
-0 -370.2411 Td
-(4636 }) 26.2111 Tj
-0 -379.7344 Td
-(4637 ) 21.8426 Tj
-0 -389.2278 Td
-(4638 int) 34.9481 Tj
-0 -398.7211 Td
-(4639 sys_close\(void\)) 87.3703 Tj
-0 -408.2145 Td
-(4640 {) 26.2111 Tj
-0 -417.7079 Td
-(4641   int fd;) 61.1592 Tj
-0 -427.2012 Td
-(4642   struct file *f;) 96.1073 Tj
-0 -436.6946 Td
-(4643 ) 21.8426 Tj
-0 -446.1879 Td
-(4644   if\(argfd\(0, &fd, &f\) < 0\)) 139.7925 Tj
-0 -455.6813 Td
-(4645     return -1;) 83.0018 Tj
-0 -465.1747 Td
-(4646   proc->ofile[fd] = 0;) 117.9499 Tj
-0 -474.668 Td
-(4647   fileclose\(f\);) 87.3703 Tj
-0 -484.1614 Td
-(4648   return 0;) 69.8962 Tj
-0 -493.6547 Td
-(4649 }) 26.2111 Tj
-0 -522.1348 Td
-(Sheet 46) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/sysfile.c  Page 3) 174.7406 Tj
-0 -28.4801 Td
-(4650 int) 34.9481 Tj
-0 -37.9735 Td
-(4651 sys_fstat\(void\)) 87.3703 Tj
-0 -47.4668 Td
-(4652 {) 26.2111 Tj
-0 -56.9602 Td
-(4653   struct file *f;) 96.1073 Tj
-0 -66.4535 Td
-(4654   struct stat *st;) 100.4758 Tj
-0 -75.9469 Td
-(4655 ) 21.8426 Tj
-0 -85.4403 Td
-(4656   if\(argfd\(0, 0, &f\) < 0 || argptr\(1, \(void*\)&st, si\
-zeof\(*st\)\) < 0\)) 314.533 Tj
-0 -94.9336 Td
-(4657     return -1;) 83.0018 Tj
-0 -104.427 Td
-(4658   return filestat\(f, st\);) 131.0554 Tj
-0 -113.9203 Td
-(4659 }) 26.2111 Tj
-0 -123.4137 Td
-(4660 ) 21.8426 Tj
-0 -132.9071 Td
-(4661 // Create the path new as a link to the same inode as old.) 275.2164 Tj
-0 -142.4004 Td
-(4662 int) 34.9481 Tj
-0 -151.8938 Td
-(4663 sys_link\(void\)) 83.0018 Tj
-0 -161.3871 Td
-(4664 {) 26.2111 Tj
-0 -170.8805 Td
-(4665   char name[DIRSIZ], *new, *old;) 161.635 Tj
-0 -180.3739 Td
-(4666   struct inode *dp, *ip;) 126.6869 Tj
-0 -189.8672 Td
-(4667 ) 21.8426 Tj
-0 -199.3606 Td
-(4668   if\(argstr\(0, &old\) < 0 || argstr\(1, &new\) < 0\)) 231.5313 Tj
-0 -208.8539 Td
-(4669     return -1;) 83.0018 Tj
-0 -218.3473 Td
-(4670   if\(\(ip = namei\(old\)\) == 0\)) 144.161 Tj
-0 -227.8407 Td
-(4671     return -1;) 83.0018 Tj
-0 -237.334 Td
-(4672   ilock\(ip\);) 74.2647 Tj
-0 -246.8274 Td
-(4673   if\(ip->type == T_DIR\){) 126.6869 Tj
-0 -256.3207 Td
-(4674     iunlockput\(ip\);) 104.8443 Tj
-0 -265.8141 Td
-(4675     return -1;) 83.0018 Tj
-0 -275.3075 Td
-(4676   }) 34.9481 Tj
-0 -284.8008 Td
-(4677   ip->nlink++;) 83.0018 Tj
-0 -294.2942 Td
-(4678   iupdate\(ip\);) 83.0018 Tj
-0 -303.7875 Td
-(4679   iunlock\(ip\);) 83.0018 Tj
-0 -313.2809 Td
-(4680 ) 21.8426 Tj
-0 -322.7743 Td
-(4681   if\(\(dp = nameiparent\(new, name\)\) == 0\)) 196.5831 Tj
-0 -332.2676 Td
-(4682     goto bad;) 78.6333 Tj
-0 -341.761 Td
-(4683   ilock\(dp\);) 74.2647 Tj
-0 -351.2543 Td
-(4684   if\(dp->dev != ip->dev || dirlink\(dp, name, ip->inum\) \
-< 0\){) 283.9534 Tj
-0 -360.7477 Td
-(4685     iunlockput\(dp\);) 104.8443 Tj
-0 -370.2411 Td
-(4686     goto bad;) 78.6333 Tj
-0 -379.7344 Td
-(4687   }) 34.9481 Tj
-0 -389.2278 Td
-(4688   iunlockput\(dp\);) 96.1073 Tj
-0 -398.7211 Td
-(4689   iput\(ip\);) 69.8962 Tj
-0 -408.2145 Td
-(4690   return 0;) 69.8962 Tj
-0 -417.7079 Td
-(4691 ) 21.8426 Tj
-0 -427.2012 Td
-(4692 bad:) 39.3166 Tj
-0 -436.6946 Td
-(4693   ilock\(ip\);) 74.2647 Tj
-0 -446.1879 Td
-(4694   ip->nlink--;) 83.0018 Tj
-0 -455.6813 Td
-(4695   iupdate\(ip\);) 83.0018 Tj
-0 -465.1747 Td
-(4696   iunlockput\(ip\);) 96.1073 Tj
-0 -474.668 Td
-(4697   return -1;) 74.2647 Tj
-0 -484.1614 Td
-(4698 }) 26.2111 Tj
-0 -493.6547 Td
-(4699 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 46) 34.9481 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
-%%Page: 54 54
-%%BeginPageSetup
-%%PageOrientation: Landscape
-pdfStartPage
-180 rotate
--612 -792 translate
-0 0 612 792 re W
-%%EndPageSetup
-[] 0 d
-1 i
-0 j
-0 J
-10 M
-1 w
-/DeviceGray {} cs
-[0] sc
-/DeviceGray {} CS
-[0] SC
-false op
-false OP
-{} settransfer
-0 0 612 792 re
-W
-q
-q
-[0.1 0 0 0.1 0 0] cm
-q
-180 3960 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 738.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/sysfile.c  Page 4) 174.7406 Tj
-0 -28.4801 Td
-(4700 // Is the directory dp empty except for "." and ".." ?) 257.7424 Tj
-0 -37.9735 Td
-(4701 static int) 65.5277 Tj
-0 -47.4668 Td
-(4702 isdirempty\(struct inode *dp\)) 144.161 Tj
-0 -56.9602 Td
-(4703 {) 26.2111 Tj
-0 -66.4535 Td
-(4704   int off;) 65.5277 Tj
-0 -75.9469 Td
-(4705   struct dirent de;) 104.8443 Tj
-0 -85.4403 Td
-(4706 ) 21.8426 Tj
-0 -94.9336 Td
-(4707   for\(off=2*sizeof\(de\); 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
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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
-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
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-[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/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
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-[10 0 0 10 0 0] cm
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-(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
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-/DeviceGray {} CS
-[0] SC
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-[10 0 0 10 0 0] cm
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-[0 -0.9679 1 0 564.72 392.865] Tm
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-(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
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-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
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-Q
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-Q
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-%%PageOrientation: Landscape
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-[0.1 0 0 0.1 0 0] cm
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-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
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-(5477 ) 21.8426 Tj
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-(5485 ) 21.8426 Tj
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-(5486 ) 21.8426 Tj
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-(5487 ) 21.8426 Tj
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-(5488 ) 21.8426 Tj
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-(5489 ) 21.8426 Tj
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-(5490 ) 21.8426 Tj
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-(5491 ) 21.8426 Tj
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-(5492 ) 21.8426 Tj
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-(5493 ) 21.8426 Tj
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-(5494 ) 21.8426 Tj
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-(5495 ) 21.8426 Tj
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-(5496 ) 21.8426 Tj
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-(5497 ) 21.8426 Tj
-0 -484.1614 Td
-(5498 ) 21.8426 Tj
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-(5499 ) 21.8426 Tj
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-(Sheet 54) 34.9481 Tj
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-(Sep  3 00:44 2009  xv6/mp.c  Page 1) 152.898 Tj
-0 -28.4801 Td
-(5500 // Multiprocessor bootstrap.) 144.161 Tj
-0 -37.9735 Td
-(5501 // Search memory for MP description structures.) 227.1628 Tj
-0 -47.4668 Td
-(5502 // http://developer.intel.com/design/pentium/datashts/2420\
-1606.pdf) 310.1645 Tj
-0 -56.9602 Td
-(5503 ) 21.8426 Tj
-0 -66.4535 Td
-(5504 #include "types.h") 100.4758 Tj
-0 -75.9469 Td
-(5505 #include "defs.h") 96.1073 Tj
-0 -85.4403 Td
-(5506 #include "param.h") 100.4758 Tj
-0 -94.9336 Td
-(5507 #include "mp.h") 87.3703 Tj
-0 -104.427 Td
-(5508 #include "x86.h") 91.7388 Tj
-0 -113.9203 Td
-(5509 #include "mmu.h") 91.7388 Tj
-0 -123.4137 Td
-(5510 #include "proc.h") 96.1073 Tj
-0 -132.9071 Td
-(5511 ) 21.8426 Tj
-0 -142.4004 Td
-(5512 struct cpu cpus[NCPU];) 117.9499 Tj
-0 -151.8938 Td
-(5513 static struct cpu *bcpu;) 126.6869 Tj
-0 -161.3871 Td
-(5514 int ismp;) 61.1592 Tj
-0 -170.8805 Td
-(5515 int ncpu;) 61.1592 Tj
-0 -180.3739 Td
-(5516 uchar ioapicid;) 87.3703 Tj
-0 -189.8672 Td
-(5517 ) 21.8426 Tj
-0 -199.3606 Td
-(5518 int) 34.9481 Tj
-0 -208.8539 Td
-(5519 mpbcpu\(void\)) 74.2647 Tj
-0 -218.3473 Td
-(5520 {) 26.2111 Tj
-0 -227.8407 Td
-(5521   return bcpu-cpus;) 104.8443 Tj
-0 -237.334 Td
-(5522 }) 26.2111 Tj
-0 -246.8274 Td
-(5523 ) 21.8426 Tj
-0 -256.3207 Td
-(5524 static uchar) 74.2647 Tj
-0 -265.8141 Td
-(5525 sum\(uchar *addr, int len\)) 131.0554 Tj
-0 -275.3075 Td
-(5526 {) 26.2111 Tj
-0 -284.8008 Td
-(5527   int i, sum;) 78.6333 Tj
-0 -294.2942 Td
-(5528 ) 21.8426 Tj
-0 -303.7875 Td
-(5529   sum = 0;) 65.5277 Tj
-0 -313.2809 Td
-(5530   for\(i=0; i<len; i++\)) 117.9499 Tj
-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
-(5537 mpsearch1\(uchar *addr, int len\)) 157.2665 Tj
-0 -389.2278 Td
-(5538 {) 26.2111 Tj
-0 -398.7211 Td
-(5539   uchar *e, *p;) 87.3703 Tj
-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
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-180 500 5760 3460 re
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-/DeviceGray {} CS
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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
-0 0 Td
-/F8_0 8.7022 Tf
-(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
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-[] 0 d
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-false OP
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-0 0 612 792 re
-W
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-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/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
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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/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
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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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-180 3960 5760 3460 re
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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/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
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-(6248 ) 21.8426 Tj
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-(6249 ) 21.8426 Tj
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-(Sheet 62) 34.9481 Tj
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-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
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-(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
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-(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 -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
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-(6305 #include "defs.h") 96.1073 Tj
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-(6306 #include "param.h") 100.4758 Tj
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-(6307 #include "traps.h") 100.4758 Tj
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-(6308 #include "spinlock.h") 113.5814 Tj
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-(6309 #include "fs.h") 87.3703 Tj
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-(6310 #include "file.h") 96.1073 Tj
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-(6311 #include "mmu.h") 91.7388 Tj
-0 -142.4004 Td
-(6312 #include "proc.h") 96.1073 Tj
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-(6313 #include "x86.h") 91.7388 Tj
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-(6314 ) 21.8426 Tj
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-(6315 static void consputc\(int\);) 135.4239 Tj
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--1504.73 TJm
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--1504.73 TJm
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-(6325 printint\(int xx, int base, int sgn\)) 174.7406 Tj
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-(6326 {) 26.2111 Tj
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-(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
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-(6335   } else) 56.7907 Tj
-0 -370.2411 Td
-(6336     x = xx;) 69.8962 Tj
-0 -379.7344 Td
-(6337 ) 21.8426 Tj
-0 -389.2278 Td
-(6338   do{) 43.6851 Tj
-0 -398.7211 Td
-(6339     buf[i++] = digits[x % base];) 161.635 Tj
-0 -408.2145 Td
-(6340   }while\(\(x /= base\) != 0\);) 139.7925 Tj
-0 -417.7079 Td
-(6341   if\(neg\)) 61.1592 Tj
-0 -427.2012 Td
-(6342     buf[i++] = '-';) 104.8443 Tj
-0 -436.6946 Td
-(6343 ) 21.8426 Tj
-0 -446.1879 Td
-(6344   while\(--i >= 0\)) 96.1073 Tj
-0 -455.6813 Td
-(6345     consputc\(buf[i]\);) 113.5814 Tj
-0 -465.1747 Td
-(6346 }) 26.2111 Tj
-0 -474.668 Td
-(6347 ) 21.8426 Tj
-0 -484.1614 Td
-(6348 ) 21.8426 Tj
-0 -493.6547 Td
-(6349 ) 21.8426 Tj
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-(Sheet 63) 34.9481 Tj
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-[10 0 0 10 0 0] cm
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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
-(6365     if\(c != '%'\){) 96.1073 Tj
-0 -180.3739 Td
-(6366       consputc\(c\);) 100.4758 Tj
-0 -189.8672 Td
-(6367       continue;) 87.3703 Tj
-0 -199.3606 Td
-(6368     }) 43.6851 Tj
-0 -208.8539 Td
-(6369     c = fmt[++i] & 0xff;) 126.6869 Tj
-0 -218.3473 Td
-(6370     if\(c == 0\)) 83.0018 Tj
-0 -227.8407 Td
-(6371       break;) 74.2647 Tj
-0 -237.334 Td
-(6372     switch\(c\){) 83.0018 Tj
-0 -246.8274 Td
-(6373     case 'd':) 78.6333 Tj
-0 -256.3207 Td
-(6374       printint\(*argp++, 10, 1\);) 157.2665 Tj
-0 -265.8141 Td
-(6375       break;) 74.2647 Tj
-0 -275.3075 Td
-(6376     case 'x':) 78.6333 Tj
-0 -284.8008 Td
-(6377     case 'p':) 78.6333 Tj
-0 -294.2942 Td
-(6378       printint\(*argp++, 16, 0\);) 157.2665 Tj
-0 -303.7875 Td
-(6379       break;) 74.2647 Tj
-0 -313.2809 Td
-(6380     case 's':) 78.6333 Tj
-0 -322.7743 Td
-(6381       if\(\(s = \(char*\)*argp++\) == 0\)) 174.7406 Tj
-0 -332.2676 Td
-(6382         s = "\(null\)";) 113.5814 Tj
-0 -341.761 Td
-(6383       for\(; *s; s++\)) 109.2129 Tj
-0 -351.2543 Td
-(6384         consputc\(*s\);) 113.5814 Tj
-0 -360.7477 Td
-(6385       break;) 74.2647 Tj
-0 -370.2411 Td
-(6386     case '%':) 78.6333 Tj
-0 -379.7344 Td
-(6387       consputc\('%'\);) 109.2129 Tj
-0 -389.2278 Td
-(6388       break;) 74.2647 Tj
-0 -398.7211 Td
-(6389     default:) 74.2647 Tj
-0 -408.2145 Td
-(6390       // Print unknown % sequence to draw attention.) 249.0053 Tj
-0 -417.7079 Td
-(6391       consputc\('%'\);) 109.2129 Tj
-0 -427.2012 Td
-(6392       consputc\(c\);) 100.4758 Tj
-0 -436.6946 Td
-(6393       break;) 74.2647 Tj
-0 -446.1879 Td
-(6394     }) 43.6851 Tj
-0 -455.6813 Td
-(6395   }) 34.9481 Tj
-0 -465.1747 Td
-(6396 ) 21.8426 Tj
-0 -474.668 Td
-(6397   if\(locking\)) 78.6333 Tj
-0 -484.1614 Td
-(6398     release\(&cons.lock\);) 126.6869 Tj
-0 -493.6547 Td
-(6399 }) 26.2111 Tj
-0 -522.1348 Td
-(Sheet 63) 34.9481 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
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-[0.1 0 0 0.1 0 0] cm
-q
-180 3960 5760 3460 re
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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/console.c  Page 3) 174.7406 Tj
-0 -28.4801 Td
-(6400 void) 39.3166 Tj
-0 -37.9735 Td
-(6401 panic\(char *s\)) 83.0018 Tj
-0 -47.4668 Td
-(6402 {) 26.2111 Tj
-0 -56.9602 Td
-(6403   int i;) 56.7907 Tj
-0 -66.4535 Td
-(6404   uint pcs[10];) 87.3703 Tj
-0 -75.9469 Td
-(6405 ) 21.8426 Tj
-0 -85.4403 Td
-(6406   cli\(\);) 56.7907 Tj
-0 -94.9336 Td
-(6407   cons.locking = 0;) 104.8443 Tj
-0 -104.427 Td
-(6408   cprintf\("cpu%d: panic: ", cpu->id\);) 183.4776 Tj
-0 -113.9203 Td
-(6409   cprintf\(s\);) 78.6333 Tj
-0 -123.4137 Td
-(6410   cprintf\("\\n"\);) 91.7388 Tj
-0 -132.9071 Td
-(6411   getcallerpcs\(&s, pcs\);) 126.6869 Tj
-0 -142.4004 Td
-(6412   for\(i=0; i<10; i++\)) 113.5814 Tj
-0 -151.8938 Td
-(6413     cprintf\(" %p", pcs[i]\);) 139.7925 Tj
-0 -161.3871 Td
-(6414   panicked = 1; // freeze other CPU) 174.7406 Tj
-0 -170.8805 Td
-(6415   for\(;;\)) 61.1592 Tj
-0 -180.3739 Td
-(6416     ;) 43.6851 Tj
-0 -189.8672 Td
-(6417 }) 26.2111 Tj
-0 -199.3606 Td
-(6418 ) 21.8426 Tj
-0 -208.8539 Td
-(6419 ) 21.8426 Tj
-0 -218.3473 Td
-(6420 ) 21.8426 Tj
-0 -227.8407 Td
-(6421 ) 21.8426 Tj
-0 -237.334 Td
-(6422 ) 21.8426 Tj
-0 -246.8274 Td
-(6423 ) 21.8426 Tj
-0 -256.3207 Td
-(6424 ) 21.8426 Tj
-0 -265.8141 Td
-(6425 ) 21.8426 Tj
-0 -275.3075 Td
-(6426 ) 21.8426 Tj
-0 -284.8008 Td
-(6427 ) 21.8426 Tj
-0 -294.2942 Td
-(6428 ) 21.8426 Tj
-0 -303.7875 Td
-(6429 ) 21.8426 Tj
-0 -313.2809 Td
-(6430 ) 21.8426 Tj
-0 -322.7743 Td
-(6431 ) 21.8426 Tj
-0 -332.2676 Td
-(6432 ) 21.8426 Tj
-0 -341.761 Td
-(6433 ) 21.8426 Tj
-0 -351.2543 Td
-(6434 ) 21.8426 Tj
-0 -360.7477 Td
-(6435 ) 21.8426 Tj
-0 -370.2411 Td
-(6436 ) 21.8426 Tj
-0 -379.7344 Td
-(6437 ) 21.8426 Tj
-0 -389.2278 Td
-(6438 ) 21.8426 Tj
-0 -398.7211 Td
-(6439 ) 21.8426 Tj
-0 -408.2145 Td
-(6440 ) 21.8426 Tj
-0 -417.7079 Td
-(6441 ) 21.8426 Tj
-0 -427.2012 Td
-(6442 ) 21.8426 Tj
-0 -436.6946 Td
-(6443 ) 21.8426 Tj
-0 -446.1879 Td
-(6444 ) 21.8426 Tj
-0 -455.6813 Td
-(6445 ) 21.8426 Tj
-0 -465.1747 Td
-(6446 ) 21.8426 Tj
-0 -474.668 Td
-(6447 ) 21.8426 Tj
-0 -484.1614 Td
-(6448 ) 21.8426 Tj
-0 -493.6547 Td
-(6449 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 64) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/console.c  Page 4) 174.7406 Tj
-0 -28.4801 Td
-(6450 #define BACKSPACE 0x100) 122.3184 Tj
-0 -37.9735 Td
-(6451 #define CRTPORT 0x3d4) 113.5814 Tj
-0 -47.4668 Td
-(6452 static ushort *crt = \(ushort*\)0xb8000;  // CGA memory) 253.3738 Tj
-0 -56.9602 Td
-(6453 ) 21.8426 Tj
-0 -66.4535 Td
-(6454 static void) 69.8962 Tj
-0 -75.9469 Td
-(6455 cgaputc\(int c\)) 83.0018 Tj
-0 -85.4403 Td
-(6456 {) 26.2111 Tj
-0 -94.9336 Td
-(6457   int pos;) 65.5277 Tj
-0 -104.427 Td
-(6458 ) 21.8426 Tj
-0 -113.9203 Td
-(6459   // Cursor position: col + 80*row.) 174.7406 Tj
-0 -123.4137 Td
-(6460   outb\(CRTPORT, 14\);) 109.2129 Tj
-0 -132.9071 Td
-(6461   pos = inb\(CRTPORT+1\) << 8;) 144.161 Tj
-0 -142.4004 Td
-(6462   outb\(CRTPORT, 15\);) 109.2129 Tj
-0 -151.8938 Td
-(6463   pos |= inb\(CRTPORT+1\);) 126.6869 Tj
-0 -161.3871 Td
-(6464 ) 21.8426 Tj
-0 -170.8805 Td
-(6465   if\(c == '\\n'\)) 87.3703 Tj
-0 -180.3739 Td
-(6466     pos += 80 - pos%80;) 122.3184 Tj
-0 -189.8672 Td
-(6467   else if\(c == BACKSPACE\){) 135.4239 Tj
-0 -199.3606 Td
-(6468     if\(pos > 0\)) 87.3703 Tj
-0 -208.8539 Td
-(6469       crt[--pos] = ' ' | 0x0700;) 161.635 Tj
-0 -218.3473 Td
-(6470   } else) 56.7907 Tj
-0 -227.8407 Td
-(6471     crt[pos++] = \(c&0xff\) | 0x0700;  // black on white) 257.7424 Tj
-0 -237.334 Td
-(6472 ) 21.8426 Tj
-0 -246.8274 Td
-(6473   if\(\(pos/80\) >= 24\){  // Scroll up.) 179.1091 Tj
-0 -256.3207 Td
-(6474     memmove\(crt, crt+80, sizeof\(crt[0]\)*23*80\);) 227.1628 Tj
-0 -265.8141 Td
-(6475     pos -= 80;) 83.0018 Tj
-0 -275.3075 Td
-(6476     memset\(crt+pos, 0, sizeof\(crt[0]\)*\(24*80 - pos\)\)\
-;) 253.3738 Tj
-0 -284.8008 Td
-(6477   }) 34.9481 Tj
-0 -294.2942 Td
-(6478 ) 21.8426 Tj
-0 -303.7875 Td
-(6479   outb\(CRTPORT, 14\);) 109.2129 Tj
-0 -313.2809 Td
-(6480   outb\(CRTPORT+1, pos>>8\);) 135.4239 Tj
-0 -322.7743 Td
-(6481   outb\(CRTPORT, 15\);) 109.2129 Tj
-0 -332.2676 Td
-(6482   outb\(CRTPORT+1, pos\);) 122.3184 Tj
-0 -341.761 Td
-(6483   crt[pos] = ' ' | 0x0700;) 135.4239 Tj
-0 -351.2543 Td
-(6484 }) 26.2111 Tj
-0 -360.7477 Td
-(6485 ) 21.8426 Tj
-0 -370.2411 Td
-(6486 void) 39.3166 Tj
-0 -379.7344 Td
-(6487 consputc\(int c\)) 87.3703 Tj
-0 -389.2278 Td
-(6488 {) 26.2111 Tj
-0 -398.7211 Td
-(6489   if\(panicked\){) 87.3703 Tj
-0 -408.2145 Td
-(6490     cli\(\);) 65.5277 Tj
-0 -417.7079 Td
-(6491     for\(;;\)) 69.8962 Tj
-0 -427.2012 Td
-(6492       ;) 52.4222 Tj
-0 -436.6946 Td
-(6493   }) 34.9481 Tj
-0 -446.1879 Td
-(6494 ) 21.8426 Tj
-0 -455.6813 Td
-(6495   uartputc\(c\);) 83.0018 Tj
-0 -465.1747 Td
-(6496   cgaputc\(c\);) 78.6333 Tj
-0 -474.668 Td
-(6497 }) 26.2111 Tj
-0 -484.1614 Td
-(6498 ) 21.8426 Tj
-0 -493.6547 Td
-(6499 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 64) 34.9481 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
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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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-q
-[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/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
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-[] 0 d
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-[0] SC
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-0 0 612 792 re
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-q
-q
-[0.1 0 0 0.1 0 0] cm
-q
-180 3960 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 738.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/console.c  Page 7) 174.7406 Tj
-0 -28.4801 Td
-(6600 int) 34.9481 Tj
-0 -37.9735 Td
-(6601 consolewrite\(struct inode *ip, char *buf, int n\)) 231.5313 Tj
-0 -47.4668 Td
-(6602 {) 26.2111 Tj
-0 -56.9602 Td
-(6603   int i;) 56.7907 Tj
-0 -66.4535 Td
-(6604 ) 21.8426 Tj
-0 -75.9469 Td
-(6605   iunlock\(ip\);) 83.0018 Tj
-0 -85.4403 Td
-(6606   acquire\(&cons.lock\);) 117.9499 Tj
-0 -94.9336 Td
-(6607   for\(i = 0; i < n; i++\)) 126.6869 Tj
-0 -104.427 Td
-(6608     consputc\(buf[i] & 0xff\);) 144.161 Tj
-0 -113.9203 Td
-(6609   release\(&cons.lock\);) 117.9499 Tj
-0 -123.4137 Td
-(6610   ilock\(ip\);) 74.2647 Tj
-0 -132.9071 Td
-(6611 ) 21.8426 Tj
-0 -142.4004 Td
-(6612   return n;) 69.8962 Tj
-0 -151.8938 Td
-(6613 }) 26.2111 Tj
-0 -161.3871 Td
-(6614 ) 21.8426 Tj
-0 -170.8805 Td
-(6615 void) 39.3166 Tj
-0 -180.3739 Td
-(6616 consoleinit\(void\)) 96.1073 Tj
-0 -189.8672 Td
-(6617 {) 26.2111 Tj
-0 -199.3606 Td
-(6618   initlock\(&cons.lock, "console"\);) 170.3721 Tj
-0 -208.8539 Td
-(6619   initlock\(&input.lock, "input"\);) 166.0035 Tj
-0 -218.3473 Td
-(6620 ) 21.8426 Tj
-0 -227.8407 Td
-(6621   devsw[CONSOLE].write = consolewrite;) 187.8461 Tj
-0 -237.334 Td
-(6622   devsw[CONSOLE].read = consoleread;) 179.1091 Tj
-0 -246.8274 Td
-(6623   cons.locking = 1;) 104.8443 Tj
-0 -256.3207 Td
-(6624 ) 21.8426 Tj
-0 -265.8141 Td
-(6625   picenable\(IRQ_KBD\);) 113.5814 Tj
-0 -275.3075 Td
-(6626   ioapicenable\(IRQ_KBD, 0\);) 139.7925 Tj
-0 -284.8008 Td
-(6627 }) 26.2111 Tj
-0 -294.2942 Td
-(6628 ) 21.8426 Tj
-0 -303.7875 Td
-(6629 ) 21.8426 Tj
-0 -313.2809 Td
-(6630 ) 21.8426 Tj
-0 -322.7743 Td
-(6631 ) 21.8426 Tj
-0 -332.2676 Td
-(6632 ) 21.8426 Tj
-0 -341.761 Td
-(6633 ) 21.8426 Tj
-0 -351.2543 Td
-(6634 ) 21.8426 Tj
-0 -360.7477 Td
-(6635 ) 21.8426 Tj
-0 -370.2411 Td
-(6636 ) 21.8426 Tj
-0 -379.7344 Td
-(6637 ) 21.8426 Tj
-0 -389.2278 Td
-(6638 ) 21.8426 Tj
-0 -398.7211 Td
-(6639 ) 21.8426 Tj
-0 -408.2145 Td
-(6640 ) 21.8426 Tj
-0 -417.7079 Td
-(6641 ) 21.8426 Tj
-0 -427.2012 Td
-(6642 ) 21.8426 Tj
-0 -436.6946 Td
-(6643 ) 21.8426 Tj
-0 -446.1879 Td
-(6644 ) 21.8426 Tj
-0 -455.6813 Td
-(6645 ) 21.8426 Tj
-0 -465.1747 Td
-(6646 ) 21.8426 Tj
-0 -474.668 Td
-(6647 ) 21.8426 Tj
-0 -484.1614 Td
-(6648 ) 21.8426 Tj
-0 -493.6547 Td
-(6649 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 66) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/timer.c  Page 1) 166.0035 Tj
-0 -28.4801 Td
-(6650 // Intel 8253/8254/82C54 Programmable Interval Timer \(PIT\
-\).) 279.5849 Tj
-0 -37.9735 Td
-(6651 // Only used on uniprocessors;) 152.898 Tj
-0 -47.4668 Td
-(6652 // SMP machines use the local APIC timer.) 200.9517 Tj
-0 -56.9602 Td
-(6653 ) 21.8426 Tj
-0 -66.4535 Td
-(6654 #include "types.h") 100.4758 Tj
-0 -75.9469 Td
-(6655 #include "defs.h") 96.1073 Tj
-0 -85.4403 Td
-(6656 #include "traps.h") 100.4758 Tj
-0 -94.9336 Td
-(6657 #include "x86.h") 91.7388 Tj
-0 -104.427 Td
-(6658 ) 21.8426 Tj
-0 -113.9203 Td
-(6659 #define IO_TIMER1       0x040           // 8253 Timer #1) 266.4794 Tj
-0 -123.4137 Td
-(6660 ) 21.8426 Tj
-0 -132.9071 Td
-(6661 // Frequency of all three count-down timers;) 214.0572 Tj
-0 -142.4004 Td
-(6662 // \(TIMER_FREQ/freq\) is the appropriate count) 218.4257 Tj
-0 -151.8938 Td
-(6663 // to generate a frequency of freq Hz.) 187.8461 Tj
-0 -161.3871 Td
-(6664 ) 21.8426 Tj
-0 -170.8805 Td
-(6665 #define TIMER_FREQ      1193182) 157.2665 Tj
-0 -180.3739 Td
-(6666 #define TIMER_DIV\(x\)    \(\(TIMER_FREQ+\(x\)/2\)/\(x\)\)) 231.5313 Tj
-0 -189.8672 Td
-(6667 ) 21.8426 Tj
-0 -199.3606 Td
-(6668 #define TIMER_MODE      \(IO_TIMER1 + 3\) // timer mode po\
-rt) 275.2164 Tj
-0 -208.8539 Td
-(6669 #define TIMER_SEL0      0x00    // select counter 0) 244.6368 Tj
-0 -218.3473 Td
-(6670 #define TIMER_RATEGEN   0x04    // mode 2, rate generator) 270.8479 Tj
-0 -227.8407 Td
-(6671 #define TIMER_16BIT     0x30    // r/w counter 16 bits, LS\
-B first) 305.796 Tj
-0 -237.334 Td
-(6672 ) 21.8426 Tj
-0 -246.8274 Td
-(6673 void) 39.3166 Tj
-0 -256.3207 Td
-(6674 timerinit\(void\)) 87.3703 Tj
-0 -265.8141 Td
-(6675 {) 26.2111 Tj
-0 -275.3075 Td
-(6676   // Interrupt 100 times/sec.) 148.5295 Tj
-0 -284.8008 Td
-(6677   outb\(TIMER_MODE, TIMER_SEL0 | TIMER_RATEGEN | TIMER_16B\
-IT\);) 288.322 Tj
-0 -294.2942 Td
-(6678   outb\(IO_TIMER1, TIMER_DIV\(100\) % 256\);) 196.5831 Tj
-0 -303.7875 Td
-(6679   outb\(IO_TIMER1, TIMER_DIV\(100\) / 256\);) 196.5831 Tj
-0 -313.2809 Td
-(6680   picenable\(IRQ_TIMER\);) 122.3184 Tj
-0 -322.7743 Td
-(6681 }) 26.2111 Tj
-0 -332.2676 Td
-(6682 ) 21.8426 Tj
-0 -341.761 Td
-(6683 ) 21.8426 Tj
-0 -351.2543 Td
-(6684 ) 21.8426 Tj
-0 -360.7477 Td
-(6685 ) 21.8426 Tj
-0 -370.2411 Td
-(6686 ) 21.8426 Tj
-0 -379.7344 Td
-(6687 ) 21.8426 Tj
-0 -389.2278 Td
-(6688 ) 21.8426 Tj
-0 -398.7211 Td
-(6689 ) 21.8426 Tj
-0 -408.2145 Td
-(6690 ) 21.8426 Tj
-0 -417.7079 Td
-(6691 ) 21.8426 Tj
-0 -427.2012 Td
-(6692 ) 21.8426 Tj
-0 -436.6946 Td
-(6693 ) 21.8426 Tj
-0 -446.1879 Td
-(6694 ) 21.8426 Tj
-0 -455.6813 Td
-(6695 ) 21.8426 Tj
-0 -465.1747 Td
-(6696 ) 21.8426 Tj
-0 -474.668 Td
-(6697 ) 21.8426 Tj
-0 -484.1614 Td
-(6698 ) 21.8426 Tj
-0 -493.6547 Td
-(6699 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 66) 34.9481 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
-%%Page: 74 74
-%%BeginPageSetup
-%%PageOrientation: Landscape
-pdfStartPage
-180 rotate
--612 -792 translate
-0 0 612 792 re W
-%%EndPageSetup
-[] 0 d
-1 i
-0 j
-0 J
-10 M
-1 w
-/DeviceGray {} cs
-[0] sc
-/DeviceGray {} CS
-[0] SC
-false op
-false OP
-{} settransfer
-0 0 612 792 re
-W
-q
-q
-[0.1 0 0 0.1 0 0] cm
-q
-180 3960 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 738.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/initcode.S  Page 1) 179.1091 Tj
-0 -28.4801 Td
-(6700 # Initial process execs /init.) 152.898 Tj
-0 -37.9735 Td
-(6701 ) 21.8426 Tj
-0 -47.4668 Td
-(6702 #include "syscall.h") 109.2129 Tj
-0 -56.9602 Td
-(6703 #include "traps.h") 100.4758 Tj
-0 -66.4535 Td
-(6704 ) 21.8426 Tj
-0 -75.9469 Td
-(6705 # exec\(init, argv\)) 100.4758 Tj
-0 -85.4403 Td
-(6706 .globl start) 74.2647 Tj
-0 -94.9336 Td
-(6707 start:) 48.0537 Tj
-0 -104.427 Td
-(6708   pushl $argv) 78.6333 Tj
-0 -113.9203 Td
-(6709   pushl $init) 78.6333 Tj
-0 -123.4137 Td
-(6710   pushl $0  // where caller pc would be) 192.2146 Tj
-0 -132.9071 Td
-(6711   movl $SYS_exec, %eax) 117.9499 Tj
-0 -142.4004 Td
-(6712   int $T_SYSCALL) 91.7388 Tj
-0 -151.8938 Td
-(6713 ) 21.8426 Tj
-0 -161.3871 Td
-(6714 # for\(;;\) exit\(\);) 96.1073 Tj
-0 -170.8805 Td
-(6715 exit:) 43.6851 Tj
-0 -180.3739 Td
-(6716   movl $SYS_exit, %eax) 117.9499 Tj
-0 -189.8672 Td
-(6717   int $T_SYSCALL) 91.7388 Tj
-0 -199.3606 Td
-(6718   jmp exit) 65.5277 Tj
-0 -208.8539 Td
-(6719 ) 21.8426 Tj
-0 -218.3473 Td
-(6720 # char init[] = "/init\\0";) 135.4239 Tj
-0 -227.8407 Td
-(6721 init:) 43.6851 Tj
-0 -237.334 Td
-(6722   .string "/init\\0") 104.8443 Tj
-0 -246.8274 Td
-(6723 ) 21.8426 Tj
-0 -256.3207 Td
-(6724 # char *argv[] = { init, 0 };) 148.5295 Tj
-0 -265.8141 Td
-(6725 .p2align 2) 65.5277 Tj
-0 -275.3075 Td
-(6726 argv:) 43.6851 Tj
-0 -284.8008 Td
-(6727   .long init) 74.2647 Tj
-0 -294.2942 Td
-(6728   .long 0) 61.1592 Tj
-0 -303.7875 Td
-(6729 ) 21.8426 Tj
-0 -313.2809 Td
-(6730 ) 21.8426 Tj
-0 -322.7743 Td
-(6731 ) 21.8426 Tj
-0 -332.2676 Td
-(6732 ) 21.8426 Tj
-0 -341.761 Td
-(6733 ) 21.8426 Tj
-0 -351.2543 Td
-(6734 ) 21.8426 Tj
-0 -360.7477 Td
-(6735 ) 21.8426 Tj
-0 -370.2411 Td
-(6736 ) 21.8426 Tj
-0 -379.7344 Td
-(6737 ) 21.8426 Tj
-0 -389.2278 Td
-(6738 ) 21.8426 Tj
-0 -398.7211 Td
-(6739 ) 21.8426 Tj
-0 -408.2145 Td
-(6740 ) 21.8426 Tj
-0 -417.7079 Td
-(6741 ) 21.8426 Tj
-0 -427.2012 Td
-(6742 ) 21.8426 Tj
-0 -436.6946 Td
-(6743 ) 21.8426 Tj
-0 -446.1879 Td
-(6744 ) 21.8426 Tj
-0 -455.6813 Td
-(6745 ) 21.8426 Tj
-0 -465.1747 Td
-(6746 ) 21.8426 Tj
-0 -474.668 Td
-(6747 ) 21.8426 Tj
-0 -484.1614 Td
-(6748 ) 21.8426 Tj
-0 -493.6547 Td
-(6749 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 67) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/usys.S  Page 1) 161.635 Tj
-0 -28.4801 Td
-(6750 #include "syscall.h") 109.2129 Tj
-0 -37.9735 Td
-(6751 #include "traps.h") 100.4758 Tj
-0 -47.4668 Td
-(6752 ) 21.8426 Tj
-0 -56.9602 Td
-(6753 #define SYSCALL\(name\) \\) 122.3184 Tj
-0 -66.4535 Td
-(6754   .globl name; \\) 91.7388 Tj
-0 -75.9469 Td
-(6755   name: \\) 61.1592 Tj
-0 -85.4403 Td
-(6756     movl $SYS_ ## name, %eax; \\) 157.2665 Tj
-0 -94.9336 Td
-(6757     int $T_SYSCALL; \\) 113.5814 Tj
-0 -104.427 Td
-(6758     ret) 52.4222 Tj
-0 -113.9203 Td
-(6759 ) 21.8426 Tj
-0 -123.4137 Td
-(6760 SYSCALL\(fork\)) 78.6333 Tj
-0 -132.9071 Td
-(6761 SYSCALL\(exit\)) 78.6333 Tj
-0 -142.4004 Td
-(6762 SYSCALL\(wait\)) 78.6333 Tj
-0 -151.8938 Td
-(6763 SYSCALL\(pipe\)) 78.6333 Tj
-0 -161.3871 Td
-(6764 SYSCALL\(read\)) 78.6333 Tj
-0 -170.8805 Td
-(6765 SYSCALL\(write\)) 83.0018 Tj
-0 -180.3739 Td
-(6766 SYSCALL\(close\)) 83.0018 Tj
-0 -189.8672 Td
-(6767 SYSCALL\(kill\)) 78.6333 Tj
-0 -199.3606 Td
-(6768 SYSCALL\(exec\)) 78.6333 Tj
-0 -208.8539 Td
-(6769 SYSCALL\(open\)) 78.6333 Tj
-0 -218.3473 Td
-(6770 SYSCALL\(mknod\)) 83.0018 Tj
-0 -227.8407 Td
-(6771 SYSCALL\(unlink\)) 87.3703 Tj
-0 -237.334 Td
-(6772 SYSCALL\(fstat\)) 83.0018 Tj
-0 -246.8274 Td
-(6773 SYSCALL\(link\)) 78.6333 Tj
-0 -256.3207 Td
-(6774 SYSCALL\(mkdir\)) 83.0018 Tj
-0 -265.8141 Td
-(6775 SYSCALL\(chdir\)) 83.0018 Tj
-0 -275.3075 Td
-(6776 SYSCALL\(dup\)) 74.2647 Tj
-0 -284.8008 Td
-(6777 SYSCALL\(getpid\)) 87.3703 Tj
-0 -294.2942 Td
-(6778 SYSCALL\(sbrk\)) 78.6333 Tj
-0 -303.7875 Td
-(6779 SYSCALL\(sleep\)) 83.0018 Tj
-0 -313.2809 Td
-(6780 ) 21.8426 Tj
-0 -322.7743 Td
-(6781 ) 21.8426 Tj
-0 -332.2676 Td
-(6782 ) 21.8426 Tj
-0 -341.761 Td
-(6783 ) 21.8426 Tj
-0 -351.2543 Td
-(6784 ) 21.8426 Tj
-0 -360.7477 Td
-(6785 ) 21.8426 Tj
-0 -370.2411 Td
-(6786 ) 21.8426 Tj
-0 -379.7344 Td
-(6787 ) 21.8426 Tj
-0 -389.2278 Td
-(6788 ) 21.8426 Tj
-0 -398.7211 Td
-(6789 ) 21.8426 Tj
-0 -408.2145 Td
-(6790 ) 21.8426 Tj
-0 -417.7079 Td
-(6791 ) 21.8426 Tj
-0 -427.2012 Td
-(6792 ) 21.8426 Tj
-0 -436.6946 Td
-(6793 ) 21.8426 Tj
-0 -446.1879 Td
-(6794 ) 21.8426 Tj
-0 -455.6813 Td
-(6795 ) 21.8426 Tj
-0 -465.1747 Td
-(6796 ) 21.8426 Tj
-0 -474.668 Td
-(6797 ) 21.8426 Tj
-0 -484.1614 Td
-(6798 ) 21.8426 Tj
-0 -493.6547 Td
-(6799 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 67) 34.9481 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
-%%Page: 75 75
-%%BeginPageSetup
-%%PageOrientation: Landscape
-pdfStartPage
-180 rotate
--612 -792 translate
-0 0 612 792 re W
-%%EndPageSetup
-[] 0 d
-1 i
-0 j
-0 J
-10 M
-1 w
-/DeviceGray {} cs
-[0] sc
-/DeviceGray {} CS
-[0] SC
-false op
-false OP
-{} settransfer
-0 0 612 792 re
-W
-q
-q
-[0.1 0 0 0.1 0 0] cm
-q
-180 3960 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 738.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/init.c  Page 1) 161.635 Tj
-0 -28.4801 Td
-(6800 // init: The initial user-level program) 192.2146 Tj
-0 -37.9735 Td
-(6801 ) 21.8426 Tj
-0 -47.4668 Td
-(6802 #include "types.h") 100.4758 Tj
-0 -56.9602 Td
-(6803 #include "stat.h") 96.1073 Tj
-0 -66.4535 Td
-(6804 #include "user.h") 96.1073 Tj
-0 -75.9469 Td
-(6805 #include "fcntl.h") 100.4758 Tj
-0 -85.4403 Td
-(6806 ) 21.8426 Tj
-0 -94.9336 Td
-(6807 char *argv[] = { "sh", 0 };) 139.7925 Tj
-0 -104.427 Td
-(6808 ) 21.8426 Tj
-0 -113.9203 Td
-(6809 int) 34.9481 Tj
-0 -123.4137 Td
-(6810 main\(void\)) 65.5277 Tj
-0 -132.9071 Td
-(6811 {) 26.2111 Tj
-0 -142.4004 Td
-(6812   int pid, wpid;) 91.7388 Tj
-0 -151.8938 Td
-(6813 ) 21.8426 Tj
-0 -161.3871 Td
-(6814   if\(open\("console", O_RDWR\) < 0\){) 170.3721 Tj
-0 -170.8805 Td
-(6815     mknod\("console", 1, 1\);) 139.7925 Tj
-0 -180.3739 Td
-(6816     open\("console", O_RDWR\);) 144.161 Tj
-0 -189.8672 Td
-(6817   }) 34.9481 Tj
-0 -199.3606 Td
-(6818   dup\(0\);  // stdout) 109.2129 Tj
-0 -208.8539 Td
-(6819   dup\(0\);  // stderr) 109.2129 Tj
-0 -218.3473 Td
-(6820 ) 21.8426 Tj
-0 -227.8407 Td
-(6821   for\(;;\){) 65.5277 Tj
-0 -237.334 Td
-(6822     printf\(1, "init: starting sh\\n"\);) 183.4776 Tj
-0 -246.8274 Td
-(6823     pid = fork\(\);) 96.1073 Tj
-0 -256.3207 Td
-(6824     if\(pid < 0\){) 91.7388 Tj
-0 -265.8141 Td
-(6825       printf\(1, "init: fork failed\\n"\);) 192.2146 Tj
-0 -275.3075 Td
-(6826       exit\(\);) 78.6333 Tj
-0 -284.8008 Td
-(6827     }) 43.6851 Tj
-0 -294.2942 Td
-(6828     if\(pid == 0\){) 96.1073 Tj
-0 -303.7875 Td
-(6829       exec\("sh", argv\);) 122.3184 Tj
-0 -313.2809 Td
-(6830       printf\(1, "init: exec sh failed\\n"\);) 205.3202 Tj
-0 -322.7743 Td
-(6831       exit\(\);) 78.6333 Tj
-0 -332.2676 Td
-(6832     }) 43.6851 Tj
-0 -341.761 Td
-(6833     while\(\(wpid=wait\(\)\) >= 0 && wpid != pid\)) 214.0572 Tj
-0 -351.2543 Td
-(6834       printf\(1, "zombie!\\n"\);) 148.5295 Tj
-0 -360.7477 Td
-(6835   }) 34.9481 Tj
-0 -370.2411 Td
-(6836 }) 26.2111 Tj
-0 -379.7344 Td
-(6837 ) 21.8426 Tj
-0 -389.2278 Td
-(6838 ) 21.8426 Tj
-0 -398.7211 Td
-(6839 ) 21.8426 Tj
-0 -408.2145 Td
-(6840 ) 21.8426 Tj
-0 -417.7079 Td
-(6841 ) 21.8426 Tj
-0 -427.2012 Td
-(6842 ) 21.8426 Tj
-0 -436.6946 Td
-(6843 ) 21.8426 Tj
-0 -446.1879 Td
-(6844 ) 21.8426 Tj
-0 -455.6813 Td
-(6845 ) 21.8426 Tj
-0 -465.1747 Td
-(6846 ) 21.8426 Tj
-0 -474.668 Td
-(6847 ) 21.8426 Tj
-0 -484.1614 Td
-(6848 ) 21.8426 Tj
-0 -493.6547 Td
-(6849 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 68) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/sh.c  Page 1) 152.898 Tj
-0 -28.4801 Td
-(6850 // Shell.) 61.1592 Tj
-0 -37.9735 Td
-(6851 ) 21.8426 Tj
-0 -47.4668 Td
-(6852 #include "types.h") 100.4758 Tj
-0 -56.9602 Td
-(6853 #include "user.h") 96.1073 Tj
-0 -66.4535 Td
-(6854 #include "fcntl.h") 100.4758 Tj
-0 -75.9469 Td
-(6855 ) 21.8426 Tj
-0 -85.4403 Td
-(6856 // Parsed command representation) 161.635 Tj
-0 -94.9336 Td
-(6857 #define EXEC  1) 87.3703 Tj
-0 -104.427 Td
-(6858 #define REDIR 2) 87.3703 Tj
-0 -113.9203 Td
-(6859 #define PIPE  3) 87.3703 Tj
-0 -123.4137 Td
-(6860 #define LIST  4) 87.3703 Tj
-0 -132.9071 Td
-(6861 #define BACK  5) 87.3703 Tj
-0 -142.4004 Td
-(6862 ) 21.8426 Tj
-0 -151.8938 Td
-(6863 #define MAXARGS 10) 100.4758 Tj
-0 -161.3871 Td
-(6864 ) 21.8426 Tj
-0 -170.8805 Td
-(6865 struct cmd {) 74.2647 Tj
-0 -180.3739 Td
-(6866   int type;) 69.8962 Tj
-0 -189.8672 Td
-(6867 };) 30.5796 Tj
-0 -199.3606 Td
-(6868 ) 21.8426 Tj
-0 -208.8539 Td
-(6869 struct execcmd {) 91.7388 Tj
-0 -218.3473 Td
-(6870   int type;) 69.8962 Tj
-0 -227.8407 Td
-(6871   char *argv[MAXARGS];) 117.9499 Tj
-0 -237.334 Td
-(6872   char *eargv[MAXARGS];) 122.3184 Tj
-0 -246.8274 Td
-(6873 };) 30.5796 Tj
-0 -256.3207 Td
-(6874 ) 21.8426 Tj
-0 -265.8141 Td
-(6875 struct redircmd {) 96.1073 Tj
-0 -275.3075 Td
-(6876   int type;) 69.8962 Tj
-0 -284.8008 Td
-(6877   struct cmd *cmd;) 100.4758 Tj
-0 -294.2942 Td
-(6878   char *file;) 78.6333 Tj
-0 -303.7875 Td
-(6879   char *efile;) 83.0018 Tj
-0 -313.2809 Td
-(6880   int mode;) 69.8962 Tj
-0 -322.7743 Td
-(6881   int fd;) 61.1592 Tj
-0 -332.2676 Td
-(6882 };) 30.5796 Tj
-0 -341.761 Td
-(6883 ) 21.8426 Tj
-0 -351.2543 Td
-(6884 struct pipecmd {) 91.7388 Tj
-0 -360.7477 Td
-(6885   int type;) 69.8962 Tj
-0 -370.2411 Td
-(6886   struct cmd *left;) 104.8443 Tj
-0 -379.7344 Td
-(6887   struct cmd *right;) 109.2129 Tj
-0 -389.2278 Td
-(6888 };) 30.5796 Tj
-0 -398.7211 Td
-(6889 ) 21.8426 Tj
-0 -408.2145 Td
-(6890 struct listcmd {) 91.7388 Tj
-0 -417.7079 Td
-(6891   int type;) 69.8962 Tj
-0 -427.2012 Td
-(6892   struct cmd *left;) 104.8443 Tj
-0 -436.6946 Td
-(6893   struct cmd *right;) 109.2129 Tj
-0 -446.1879 Td
-(6894 };) 30.5796 Tj
-0 -455.6813 Td
-(6895 ) 21.8426 Tj
-0 -465.1747 Td
-(6896 struct backcmd {) 91.7388 Tj
-0 -474.668 Td
-(6897   int type;) 69.8962 Tj
-0 -484.1614 Td
-(6898   struct cmd *cmd;) 100.4758 Tj
-0 -493.6547 Td
-(6899 };) 30.5796 Tj
-0 -522.1348 Td
-(Sheet 68) 34.9481 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
-%%Page: 76 76
-%%BeginPageSetup
-%%PageOrientation: Landscape
-pdfStartPage
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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
-/DeviceGray {} cs
-[0] sc
-/DeviceGray {} CS
-[0] SC
-false op
-false OP
-{} settransfer
-0 0 612 792 re
-W
-q
-q
-[0.1 0 0 0.1 0 0] cm
-q
-180 3960 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 738.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/sh.c  Page 2) 152.898 Tj
-0 -28.4801 Td
-(6900 int fork1\(void\);  // Fork but panics on failure.) 231.5313 Tj
-0 -37.9735 Td
-(6901 void panic\(char*\);) 100.4758 Tj
-0 -47.4668 Td
-(6902 struct cmd *parsecmd\(char*\);) 144.161 Tj
-0 -56.9602 Td
-(6903 ) 21.8426 Tj
-0 -66.4535 Td
-(6904 // Execute cmd.  Never returns.) 157.2665 Tj
-0 -75.9469 Td
-(6905 void) 39.3166 Tj
-0 -85.4403 Td
-(6906 runcmd\(struct cmd *cmd\)) 122.3184 Tj
-0 -94.9336 Td
-(6907 {) 26.2111 Tj
-0 -104.427 Td
-(6908   int p[2];) 69.8962 Tj
-0 -113.9203 Td
-(6909   struct backcmd *bcmd;) 122.3184 Tj
-0 -123.4137 Td
-(6910   struct execcmd *ecmd;) 122.3184 Tj
-0 -132.9071 Td
-(6911   struct listcmd *lcmd;) 122.3184 Tj
-0 -142.4004 Td
-(6912   struct pipecmd *pcmd;) 122.3184 Tj
-0 -151.8938 Td
-(6913   struct redircmd *rcmd;) 126.6869 Tj
-0 -161.3871 Td
-(6914 ) 21.8426 Tj
-0 -170.8805 Td
-(6915   if\(cmd == 0\)) 83.0018 Tj
-0 -180.3739 Td
-(6916     exit\(\);) 69.8962 Tj
-0 -189.8672 Td
-(6917 ) 21.8426 Tj
-0 -199.3606 Td
-(6918   switch\(cmd->type\){) 109.2129 Tj
-0 -208.8539 Td
-(6919   default:) 65.5277 Tj
-0 -218.3473 Td
-(6920     panic\("runcmd"\);) 109.2129 Tj
-0 -227.8407 Td
-(6921 ) 21.8426 Tj
-0 -237.334 Td
-(6922   case EXEC:) 74.2647 Tj
-0 -246.8274 Td
-(6923     ecmd = \(struct execcmd*\)cmd;) 161.635 Tj
-0 -256.3207 Td
-(6924     if\(ecmd->argv[0] == 0\)) 135.4239 Tj
-0 -265.8141 Td
-(6925       exit\(\);) 78.6333 Tj
-0 -275.3075 Td
-(6926     exec\(ecmd->argv[0], ecmd->argv\);) 179.1091 Tj
-0 -284.8008 Td
-(6927     printf\(2, "exec %s failed\\n", ecmd->argv[0]\);) 235.8998 Tj
-0 -294.2942 Td
-(6928     break;) 65.5277 Tj
-0 -303.7875 Td
-(6929 ) 21.8426 Tj
-0 -313.2809 Td
-(6930   case REDIR:) 78.6333 Tj
-0 -322.7743 Td
-(6931     rcmd = \(struct redircmd*\)cmd;) 166.0035 Tj
-0 -332.2676 Td
-(6932     close\(rcmd->fd\);) 109.2129 Tj
-0 -341.761 Td
-(6933     if\(open\(rcmd->file, rcmd->mode\) < 0\){) 200.9517 Tj
-0 -351.2543 Td
-(6934       printf\(2, "open %s failed\\n", rcmd->file\);) 231.5313 Tj
-0 -360.7477 Td
-(6935       exit\(\);) 78.6333 Tj
-0 -370.2411 Td
-(6936     }) 43.6851 Tj
-0 -379.7344 Td
-(6937     runcmd\(rcmd->cmd\);) 117.9499 Tj
-0 -389.2278 Td
-(6938     break;) 65.5277 Tj
-0 -398.7211 Td
-(6939 ) 21.8426 Tj
-0 -408.2145 Td
-(6940   case LIST:) 74.2647 Tj
-0 -417.7079 Td
-(6941     lcmd = \(struct listcmd*\)cmd;) 161.635 Tj
-0 -427.2012 Td
-(6942     if\(fork1\(\) == 0\)) 109.2129 Tj
-0 -436.6946 Td
-(6943       runcmd\(lcmd->left\);) 131.0554 Tj
-0 -446.1879 Td
-(6944     wait\(\);) 69.8962 Tj
-0 -455.6813 Td
-(6945     runcmd\(lcmd->right\);) 126.6869 Tj
-0 -465.1747 Td
-(6946     break;) 65.5277 Tj
-0 -474.668 Td
-(6947 ) 21.8426 Tj
-0 -484.1614 Td
-(6948 ) 21.8426 Tj
-0 -493.6547 Td
-(6949 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 69) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/sh.c  Page 3) 152.898 Tj
-0 -28.4801 Td
-(6950   case PIPE:) 74.2647 Tj
-0 -37.9735 Td
-(6951     pcmd = \(struct pipecmd*\)cmd;) 161.635 Tj
-0 -47.4668 Td
-(6952     if\(pipe\(p\) < 0\)) 104.8443 Tj
-0 -56.9602 Td
-(6953       panic\("pipe"\);) 109.2129 Tj
-0 -66.4535 Td
-(6954     if\(fork1\(\) == 0\){) 113.5814 Tj
-0 -75.9469 Td
-(6955       close\(1\);) 87.3703 Tj
-0 -85.4403 Td
-(6956       dup\(p[1]\);) 91.7388 Tj
-0 -94.9336 Td
-(6957       close\(p[0]\);) 100.4758 Tj
-0 -104.427 Td
-(6958       close\(p[1]\);) 100.4758 Tj
-0 -113.9203 Td
-(6959       runcmd\(pcmd->left\);) 131.0554 Tj
-0 -123.4137 Td
-(6960     }) 43.6851 Tj
-0 -132.9071 Td
-(6961     if\(fork1\(\) == 0\){) 113.5814 Tj
-0 -142.4004 Td
-(6962       close\(0\);) 87.3703 Tj
-0 -151.8938 Td
-(6963       dup\(p[0]\);) 91.7388 Tj
-0 -161.3871 Td
-(6964       close\(p[0]\);) 100.4758 Tj
-0 -170.8805 Td
-(6965       close\(p[1]\);) 100.4758 Tj
-0 -180.3739 Td
-(6966       runcmd\(pcmd->right\);) 135.4239 Tj
-0 -189.8672 Td
-(6967     }) 43.6851 Tj
-0 -199.3606 Td
-(6968     close\(p[0]\);) 91.7388 Tj
-0 -208.8539 Td
-(6969     close\(p[1]\);) 91.7388 Tj
-0 -218.3473 Td
-(6970     wait\(\);) 69.8962 Tj
-0 -227.8407 Td
-(6971     wait\(\);) 69.8962 Tj
-0 -237.334 Td
-(6972     break;) 65.5277 Tj
-0 -246.8274 Td
-(6973 ) 21.8426 Tj
-0 -256.3207 Td
-(6974   case BACK:) 74.2647 Tj
-0 -265.8141 Td
-(6975     bcmd = \(struct backcmd*\)cmd;) 161.635 Tj
-0 -275.3075 Td
-(6976     if\(fork1\(\) == 0\)) 109.2129 Tj
-0 -284.8008 Td
-(6977       runcmd\(bcmd->cmd\);) 126.6869 Tj
-0 -294.2942 Td
-(6978     break;) 65.5277 Tj
-0 -303.7875 Td
-(6979   }) 34.9481 Tj
-0 -313.2809 Td
-(6980   exit\(\);) 61.1592 Tj
-0 -322.7743 Td
-(6981 }) 26.2111 Tj
-0 -332.2676 Td
-(6982 ) 21.8426 Tj
-0 -341.761 Td
-(6983 int) 34.9481 Tj
-0 -351.2543 Td
-(6984 getcmd\(char *buf, int nbuf\)) 139.7925 Tj
-0 -360.7477 Td
-(6985 {) 26.2111 Tj
-0 -370.2411 Td
-(6986   printf\(2, "$ "\);) 100.4758 Tj
-0 -379.7344 Td
-(6987   memset\(buf, 0, nbuf\);) 122.3184 Tj
-0 -389.2278 Td
-(6988   gets\(buf, nbuf\);) 100.4758 Tj
-0 -398.7211 Td
-(6989   if\(buf[0] == 0\) // EOF) 126.6869 Tj
-0 -408.2145 Td
-(6990     return -1;) 83.0018 Tj
-0 -417.7079 Td
-(6991   return 0;) 69.8962 Tj
-0 -427.2012 Td
-(6992 }) 26.2111 Tj
-0 -436.6946 Td
-(6993 ) 21.8426 Tj
-0 -446.1879 Td
-(6994 ) 21.8426 Tj
-0 -455.6813 Td
-(6995 ) 21.8426 Tj
-0 -465.1747 Td
-(6996 ) 21.8426 Tj
-0 -474.668 Td
-(6997 ) 21.8426 Tj
-0 -484.1614 Td
-(6998 ) 21.8426 Tj
-0 -493.6547 Td
-(6999 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 69) 34.9481 Tj
-Q
-Q
-Q
-Q
-showpage
-%%PageTrailer
-pdfEndPage
-%%Page: 77 77
-%%BeginPageSetup
-%%PageOrientation: Landscape
-pdfStartPage
-180 rotate
--612 -792 translate
-0 0 612 792 re W
-%%EndPageSetup
-[] 0 d
-1 i
-0 j
-0 J
-10 M
-1 w
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-[0] sc
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-[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
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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
-0 0 Td
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-(Sep  3 00:44 2009  xv6/sh.c  Page 4) 152.898 Tj
-0 -28.4801 Td
-(7000 int) 34.9481 Tj
-0 -37.9735 Td
-(7001 main\(void\)) 65.5277 Tj
-0 -47.4668 Td
-(7002 {) 26.2111 Tj
-0 -56.9602 Td
-(7003   static char buf[100];) 122.3184 Tj
-0 -66.4535 Td
-(7004   int fd;) 61.1592 Tj
-0 -75.9469 Td
-(7005 ) 21.8426 Tj
-0 -85.4403 Td
-(7006   // Assumes three file descriptors open.) 200.9517 Tj
-0 -94.9336 Td
-(7007   while\(\(fd = open\("console", O_RDWR\)\) >= 0\){) 218.4257 Tj
-0 -104.427 Td
-(7008     if\(fd >= 3\){) 91.7388 Tj
-0 -113.9203 Td
-(7009       close\(fd\);) 91.7388 Tj
-0 -123.4137 Td
-(7010       break;) 74.2647 Tj
-0 -132.9071 Td
-(7011     }) 43.6851 Tj
-0 -142.4004 Td
-(7012   }) 34.9481 Tj
-0 -151.8938 Td
-(7013 ) 21.8426 Tj
-0 -161.3871 Td
-(7014   // Read and run input commands.) 166.0035 Tj
-0 -170.8805 Td
-(7015   while\(getcmd\(buf, sizeof\(buf\)\) >= 0\){) 192.2146 Tj
-0 -180.3739 Td
-(7016     if\(buf[0] == 'c' && buf[1] == 'd' && buf[2] == ' '\){) 266.4794 Tj
-0 -189.8672 Td
-(7017       // Clumsy but will have to do for now.) 214.0572 Tj
-0 -199.3606 Td
-(7018       // Chdir has no effect on the parent if run in the c\
-hild.) 297.059 Tj
-0 -208.8539 Td
-(7019       buf[strlen\(buf\)-1] = 0;  // chop \\n) 200.9517 Tj
-0 -218.3473 Td
-(7020       if\(chdir\(buf+3\) < 0\)) 135.4239 Tj
-0 -227.8407 Td
-(7021         printf\(2, "cannot cd %s\\n", buf+3\);) 209.6887 Tj
-0 -237.334 Td
-(7022       continue;) 87.3703 Tj
-0 -246.8274 Td
-(7023     }) 43.6851 Tj
-0 -256.3207 Td
-(7024     if\(fork1\(\) == 0\)) 109.2129 Tj
-0 -265.8141 Td
-(7025       runcmd\(parsecmd\(buf\)\);) 144.161 Tj
-0 -275.3075 Td
-(7026     wait\(\);) 69.8962 Tj
-0 -284.8008 Td
-(7027   }) 34.9481 Tj
-0 -294.2942 Td
-(7028   exit\(\);) 61.1592 Tj
-0 -303.7875 Td
-(7029 }) 26.2111 Tj
-0 -313.2809 Td
-(7030 ) 21.8426 Tj
-0 -322.7743 Td
-(7031 void) 39.3166 Tj
-0 -332.2676 Td
-(7032 panic\(char *s\)) 83.0018 Tj
-0 -341.761 Td
-(7033 {) 26.2111 Tj
-0 -351.2543 Td
-(7034   printf\(2, "%s\\n", s\);) 122.3184 Tj
-0 -360.7477 Td
-(7035   exit\(\);) 61.1592 Tj
-0 -370.2411 Td
-(7036 }) 26.2111 Tj
-0 -379.7344 Td
-(7037 ) 21.8426 Tj
-0 -389.2278 Td
-(7038 int) 34.9481 Tj
-0 -398.7211 Td
-(7039 fork1\(void\)) 69.8962 Tj
-0 -408.2145 Td
-(7040 {) 26.2111 Tj
-0 -417.7079 Td
-(7041   int pid;) 65.5277 Tj
-0 -427.2012 Td
-(7042 ) 21.8426 Tj
-0 -436.6946 Td
-(7043   pid = fork\(\);) 87.3703 Tj
-0 -446.1879 Td
-(7044   if\(pid == -1\)) 87.3703 Tj
-0 -455.6813 Td
-(7045     panic\("fork"\);) 100.4758 Tj
-0 -465.1747 Td
-(7046   return pid;) 78.6333 Tj
-0 -474.668 Td
-(7047 }) 26.2111 Tj
-0 -484.1614 Td
-(7048 ) 21.8426 Tj
-0 -493.6547 Td
-(7049 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 70) 34.9481 Tj
-Q
-Q
-q
-180 500 5760 3460 re
-W
-/DeviceGray {} CS
-[0] SC
-/DeviceGray {} cs
-[0] sc
-q
-[10 0 0 10 0 0] cm
-[1 0 0 1 0 0] Tm
-0 0 Td
-[0 -0.9679 1 0 564.72 392.865] Tm
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/sh.c  Page 5) 152.898 Tj
-0 -28.4801 Td
-(7050 // Constructors) 87.3703 Tj
-0 -37.9735 Td
-(7051 ) 21.8426 Tj
-0 -47.4668 Td
-(7052 struct cmd*) 69.8962 Tj
-0 -56.9602 Td
-(7053 execcmd\(void\)) 78.6333 Tj
-0 -66.4535 Td
-(7054 {) 26.2111 Tj
-0 -75.9469 Td
-(7055   struct execcmd *cmd;) 117.9499 Tj
-0 -85.4403 Td
-(7056 ) 21.8426 Tj
-0 -94.9336 Td
-(7057   cmd = malloc\(sizeof\(*cmd\)\);) 148.5295 Tj
-0 -104.427 Td
-(7058   memset\(cmd, 0, sizeof\(*cmd\)\);) 157.2665 Tj
-0 -113.9203 Td
-(7059   cmd->type = EXEC;) 104.8443 Tj
-0 -123.4137 Td
-(7060   return \(struct cmd*\)cmd;) 135.4239 Tj
-0 -132.9071 Td
-(7061 }) 26.2111 Tj
-0 -142.4004 Td
-(7062 ) 21.8426 Tj
-0 -151.8938 Td
-(7063 struct cmd*) 69.8962 Tj
-0 -161.3871 Td
-(7064 redircmd\(struct cmd *subcmd, char *file, char *efile, int\
- mode, int fd\)) 332.0071 Tj
-0 -170.8805 Td
-(7065 {) 26.2111 Tj
-0 -180.3739 Td
-(7066   struct redircmd *cmd;) 122.3184 Tj
-0 -189.8672 Td
-(7067 ) 21.8426 Tj
-0 -199.3606 Td
-(7068   cmd = malloc\(sizeof\(*cmd\)\);) 148.5295 Tj
-0 -208.8539 Td
-(7069   memset\(cmd, 0, sizeof\(*cmd\)\);) 157.2665 Tj
-0 -218.3473 Td
-(7070   cmd->type = REDIR;) 109.2129 Tj
-0 -227.8407 Td
-(7071   cmd->cmd = subcmd;) 109.2129 Tj
-0 -237.334 Td
-(7072   cmd->file = file;) 104.8443 Tj
-0 -246.8274 Td
-(7073   cmd->efile = efile;) 113.5814 Tj
-0 -256.3207 Td
-(7074   cmd->mode = mode;) 104.8443 Tj
-0 -265.8141 Td
-(7075   cmd->fd = fd;) 87.3703 Tj
-0 -275.3075 Td
-(7076   return \(struct cmd*\)cmd;) 135.4239 Tj
-0 -284.8008 Td
-(7077 }) 26.2111 Tj
-0 -294.2942 Td
-(7078 ) 21.8426 Tj
-0 -303.7875 Td
-(7079 struct cmd*) 69.8962 Tj
-0 -313.2809 Td
-(7080 pipecmd\(struct cmd *left, struct cmd *right\)) 214.0572 Tj
-0 -322.7743 Td
-(7081 {) 26.2111 Tj
-0 -332.2676 Td
-(7082   struct pipecmd *cmd;) 117.9499 Tj
-0 -341.761 Td
-(7083 ) 21.8426 Tj
-0 -351.2543 Td
-(7084   cmd = malloc\(sizeof\(*cmd\)\);) 148.5295 Tj
-0 -360.7477 Td
-(7085   memset\(cmd, 0, sizeof\(*cmd\)\);) 157.2665 Tj
-0 -370.2411 Td
-(7086   cmd->type = PIPE;) 104.8443 Tj
-0 -379.7344 Td
-(7087   cmd->left = left;) 104.8443 Tj
-0 -389.2278 Td
-(7088   cmd->right = right;) 113.5814 Tj
-0 -398.7211 Td
-(7089   return \(struct cmd*\)cmd;) 135.4239 Tj
-0 -408.2145 Td
-(7090 }) 26.2111 Tj
-0 -417.7079 Td
-(7091 ) 21.8426 Tj
-0 -427.2012 Td
-(7092 ) 21.8426 Tj
-0 -436.6946 Td
-(7093 ) 21.8426 Tj
-0 -446.1879 Td
-(7094 ) 21.8426 Tj
-0 -455.6813 Td
-(7095 ) 21.8426 Tj
-0 -465.1747 Td
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-(Sep  3 00:44 2009  xv6/sh.c  Page 6) 152.898 Tj
-0 -28.4801 Td
-(7100 struct cmd*) 69.8962 Tj
-0 -37.9735 Td
-(7101 listcmd\(struct cmd *left, struct cmd *right\)) 214.0572 Tj
-0 -47.4668 Td
-(7102 {) 26.2111 Tj
-0 -56.9602 Td
-(7103   struct listcmd *cmd;) 117.9499 Tj
-0 -66.4535 Td
-(7104 ) 21.8426 Tj
-0 -75.9469 Td
-(7105   cmd = malloc\(sizeof\(*cmd\)\);) 148.5295 Tj
-0 -85.4403 Td
-(7106   memset\(cmd, 0, sizeof\(*cmd\)\);) 157.2665 Tj
-0 -94.9336 Td
-(7107   cmd->type = LIST;) 104.8443 Tj
-0 -104.427 Td
-(7108   cmd->left = left;) 104.8443 Tj
-0 -113.9203 Td
-(7109   cmd->right = right;) 113.5814 Tj
-0 -123.4137 Td
-(7110   return \(struct cmd*\)cmd;) 135.4239 Tj
-0 -132.9071 Td
-(7111 }) 26.2111 Tj
-0 -142.4004 Td
-(7112 ) 21.8426 Tj
-0 -151.8938 Td
-(7113 struct cmd*) 69.8962 Tj
-0 -161.3871 Td
-(7114 backcmd\(struct cmd *subcmd\)) 139.7925 Tj
-0 -170.8805 Td
-(7115 {) 26.2111 Tj
-0 -180.3739 Td
-(7116   struct backcmd *cmd;) 117.9499 Tj
-0 -189.8672 Td
-(7117 ) 21.8426 Tj
-0 -199.3606 Td
-(7118   cmd = malloc\(sizeof\(*cmd\)\);) 148.5295 Tj
-0 -208.8539 Td
-(7119   memset\(cmd, 0, sizeof\(*cmd\)\);) 157.2665 Tj
-0 -218.3473 Td
-(7120   cmd->type = BACK;) 104.8443 Tj
-0 -227.8407 Td
-(7121   cmd->cmd = subcmd;) 109.2129 Tj
-0 -237.334 Td
-(7122   return \(struct cmd*\)cmd;) 135.4239 Tj
-0 -246.8274 Td
-(7123 }) 26.2111 Tj
-0 -256.3207 Td
-(7124 ) 21.8426 Tj
-0 -265.8141 Td
-(7125 ) 21.8426 Tj
-0 -275.3075 Td
-(7126 ) 21.8426 Tj
-0 -284.8008 Td
-(7127 ) 21.8426 Tj
-0 -294.2942 Td
-(7128 ) 21.8426 Tj
-0 -303.7875 Td
-(7129 ) 21.8426 Tj
-0 -313.2809 Td
-(7130 ) 21.8426 Tj
-0 -322.7743 Td
-(7131 ) 21.8426 Tj
-0 -332.2676 Td
-(7132 ) 21.8426 Tj
-0 -341.761 Td
-(7133 ) 21.8426 Tj
-0 -351.2543 Td
-(7134 ) 21.8426 Tj
-0 -360.7477 Td
-(7135 ) 21.8426 Tj
-0 -370.2411 Td
-(7136 ) 21.8426 Tj
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-(7137 ) 21.8426 Tj
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-(7138 ) 21.8426 Tj
-0 -398.7211 Td
-(7139 ) 21.8426 Tj
-0 -408.2145 Td
-(7140 ) 21.8426 Tj
-0 -417.7079 Td
-(7141 ) 21.8426 Tj
-0 -427.2012 Td
-(7142 ) 21.8426 Tj
-0 -436.6946 Td
-(7143 ) 21.8426 Tj
-0 -446.1879 Td
-(7144 ) 21.8426 Tj
-0 -455.6813 Td
-(7145 ) 21.8426 Tj
-0 -465.1747 Td
-(7146 ) 21.8426 Tj
-0 -474.668 Td
-(7147 ) 21.8426 Tj
-0 -484.1614 Td
-(7148 ) 21.8426 Tj
-0 -493.6547 Td
-(7149 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 71) 34.9481 Tj
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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
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-[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/sh.c  Page 7) 152.898 Tj
-0 -28.4801 Td
-(7150 // Parsing) 65.5277 Tj
-0 -37.9735 Td
-(7151 ) 21.8426 Tj
-0 -47.4668 Td
-(7152 char whitespace[] = " \\t\\r\\n\\v";) 161.635 Tj
-0 -56.9602 Td
-(7153 char symbols[] = "<|>&;\(\)";) 139.7925 Tj
-0 -66.4535 Td
-(7154 ) 21.8426 Tj
-0 -75.9469 Td
-(7155 int) 34.9481 Tj
-0 -85.4403 Td
-(7156 gettoken\(char **ps, char *es, char **q, char **eq\)) 240.2683 Tj
-0 -94.9336 Td
-(7157 {) 26.2111 Tj
-0 -104.427 Td
-(7158   char *s;) 65.5277 Tj
-0 -113.9203 Td
-(7159   int ret;) 65.5277 Tj
-0 -123.4137 Td
-(7160 ) 21.8426 Tj
-0 -132.9071 Td
-(7161   s = *ps;) 65.5277 Tj
-0 -142.4004 Td
-(7162   while\(s < es && strchr\(whitespace, *s\)\)) 200.9517 Tj
-0 -151.8938 Td
-(7163     s++;) 56.7907 Tj
-0 -161.3871 Td
-(7164   if\(q\)) 52.4222 Tj
-0 -170.8805 Td
-(7165     *q = s;) 69.8962 Tj
-0 -180.3739 Td
-(7166   ret = *s;) 69.8962 Tj
-0 -189.8672 Td
-(7167   switch\(*s\){) 78.6333 Tj
-0 -199.3606 Td
-(7168   case 0:) 61.1592 Tj
-0 -208.8539 Td
-(7169     break;) 65.5277 Tj
-0 -218.3473 Td
-(7170   case '|':) 69.8962 Tj
-0 -227.8407 Td
-(7171   case '\(':) 69.8962 Tj
-0 -237.334 Td
-(7172   case '\)':) 69.8962 Tj
-0 -246.8274 Td
-(7173   case ';':) 69.8962 Tj
-0 -256.3207 Td
-(7174   case '&':) 69.8962 Tj
-0 -265.8141 Td
-(7175   case '<':) 69.8962 Tj
-0 -275.3075 Td
-(7176     s++;) 56.7907 Tj
-0 -284.8008 Td
-(7177     break;) 65.5277 Tj
-0 -294.2942 Td
-(7178   case '>':) 69.8962 Tj
-0 -303.7875 Td
-(7179     s++;) 56.7907 Tj
-0 -313.2809 Td
-(7180     if\(*s == '>'\){) 100.4758 Tj
-0 -322.7743 Td
-(7181       ret = '+';) 91.7388 Tj
-0 -332.2676 Td
-(7182       s++;) 65.5277 Tj
-0 -341.761 Td
-(7183     }) 43.6851 Tj
-0 -351.2543 Td
-(7184     break;) 65.5277 Tj
-0 -360.7477 Td
-(7185   default:) 65.5277 Tj
-0 -370.2411 Td
-(7186     ret = 'a';) 83.0018 Tj
-0 -379.7344 Td
-(7187     while\(s < es && !strchr\(whitespace, *s\) && !strchr\(\
-symbols, *s\)\)) 318.9016 Tj
-0 -389.2278 Td
-(7188       s++;) 65.5277 Tj
-0 -398.7211 Td
-(7189     break;) 65.5277 Tj
-0 -408.2145 Td
-(7190   }) 34.9481 Tj
-0 -417.7079 Td
-(7191   if\(eq\)) 56.7907 Tj
-0 -427.2012 Td
-(7192     *eq = s;) 74.2647 Tj
-0 -436.6946 Td
-(7193 ) 21.8426 Tj
-0 -446.1879 Td
-(7194   while\(s < es && strchr\(whitespace, *s\)\)) 200.9517 Tj
-0 -455.6813 Td
-(7195     s++;) 56.7907 Tj
-0 -465.1747 Td
-(7196   *ps = s;) 65.5277 Tj
-0 -474.668 Td
-(7197   return ret;) 78.6333 Tj
-0 -484.1614 Td
-(7198 }) 26.2111 Tj
-0 -493.6547 Td
-(7199 ) 21.8426 Tj
-0 -522.1348 Td
-(Sheet 71) 34.9481 Tj
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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
-0 0 Td
-/F8_0 8.7022 Tf
-(Sep  3 00:44 2009  xv6/sh.c  Page 8) 152.898 Tj
-0 -28.4801 Td
-(7200 int) 34.9481 Tj
-0 -37.9735 Td
-(7201 peek\(char **ps, char *es, char *toks\)) 183.4776 Tj
-0 -47.4668 Td
-(7202 {) 26.2111 Tj
-0 -56.9602 Td
-(7203   char *s;) 65.5277 Tj
-0 -66.4535 Td
-(7204 ) 21.8426 Tj
-0 -75.9469 Td
-(7205   s = *ps;) 65.5277 Tj
-0 -85.4403 Td
-(7206   while\(s < es && strchr\(whitespace, *s\)\)) 200.9517 Tj
-0 -94.9336 Td
-(7207     s++;) 56.7907 Tj
-0 -104.427 Td
-(7208   *ps = s;) 65.5277 Tj
-0 -113.9203 Td
-(7209   return *s && strchr\(toks, *s\);) 161.635 Tj
-0 -123.4137 Td
-(7210 }) 26.2111 Tj
-0 -132.9071 Td
-(7211 ) 21.8426 Tj
-0 -142.4004 Td
-(7212 struct cmd *parseline\(char**, char*\);) 183.4776 Tj
-0 -151.8938 Td
-(7213 struct cmd *parsepipe\(char**, char*\);) 183.4776 Tj
-0 -161.3871 Td
-(7214 struct cmd *parseexec\(char**, char*\);) 183.4776 Tj
-0 -170.8805 Td
-(7215 struct cmd *nulterminate\(struct cmd*\);) 187.8461 Tj
-0 -180.3739 Td
-(7216 ) 21.8426 Tj
-0 -189.8672 Td
-(7217 struct cmd*) 69.8962 Tj
-0 -199.3606 Td
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-0 -208.8539 Td
-(7219 {) 26.2111 Tj
-0 -218.3473 Td
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-0 -227.8407 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
-(7224   cmd = parseline\(&s, es\);) 135.4239 Tj
-0 -265.8141 Td
-(7225   peek\(&s, es, ""\);) 104.8443 Tj
-0 -275.3075 Td
-(7226   if\(s != es\){) 83.0018 Tj
-0 -284.8008 Td
-(7227     printf\(2, "leftovers: %s\\n", s\);) 179.1091 Tj
-0 -294.2942 Td
-(7228     panic\("syntax"\);) 109.2129 Tj
-0 -303.7875 Td
-(7229   }) 34.9481 Tj
-0 -313.2809 Td
-(7230   nulterminate\(cmd\);) 109.2129 Tj
-0 -322.7743 Td
-(7231   return cmd;) 78.6333 Tj
-0 -332.2676 Td
-(7232 }) 26.2111 Tj
-0 -341.761 Td
-(7233 ) 21.8426 Tj
-0 -351.2543 Td
-(7234 struct cmd*) 69.8962 Tj
-0 -360.7477 Td
-(7235 parseline\(char **ps, char *es\)) 152.898 Tj
-0 -370.2411 Td
-(7236 {) 26.2111 Tj
-0 -379.7344 Td
-(7237   struct cmd *cmd;) 100.4758 Tj
-0 -389.2278 Td
-(7238 ) 21.8426 Tj
-0 -398.7211 Td
-(7239   cmd = parsepipe\(ps, es\);) 135.4239 Tj
-0 -408.2145 Td
-(7240   while\(peek\(ps, es, "&"\)\){) 139.7925 Tj
-0 -417.7079 Td
-(7241     gettoken\(ps, es, 0, 0\);) 139.7925 Tj
-0 -427.2012 Td
-(7242     cmd = backcmd\(cmd\);) 122.3184 Tj
-0 -436.6946 Td
-(7243   }) 34.9481 Tj
-0 -446.1879 Td
-(7244   if\(peek\(ps, es, ";"\)\){) 126.6869 Tj
-0 -455.6813 Td
-(7245     gettoken\(ps, es, 0, 0\);) 139.7925 Tj
-0 -465.1747 Td
-(7246     cmd = listcmd\(cmd, parseline\(ps, es\)\);) 205.3202 Tj
-0 -474.668 Td
-(7247   }) 34.9481 Tj
-0 -484.1614 Td
-(7248   return cmd;) 78.6333 Tj
-0 -493.6547 Td
-(7249 }) 26.2111 Tj
-0 -522.1348 Td
-(Sheet 72) 34.9481 Tj
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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 0 564.72 392.865] Tm
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-(Sep  3 00:44 2009  xv6/sh.c  Page 9) 152.898 Tj
-0 -28.4801 Td
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-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
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-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
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-[10 0 0 10 0 0] cm
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-(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
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