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Port of Xv6 for 25∞2
653 commits 1 branch 0 tags 18 MiB
C 94.5%
Assembly 3.4%
Makefile 1.9%
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Austin Clements 5c4dc7395b Merge branch 'master' of git+ssh://am.lcs/home/am0/6.828/xv6
2010-09-01 00:31:04 -04:00
web another rev2 -> rev3 2010-02-06 16:08:06 -05:00
.cvsignore update .cvsignore 2008-10-15 04:54:24 +00:00
.gdbinit.tmpl Use the symbol file 2009-09-20 23:08:36 -04:00
.gitignore ignore .gitignore 2009-09-15 17:21:02 -04:00
asm.h add some comments 2010-08-05 21:16:55 -04:00
bio.c a few nits 2010-07-23 12:52:50 -04:00
bootasm.S add some comments 2010-08-05 21:16:55 -04:00
bootmain.c xv6: boot loader adjustments 2009-03-08 21:41:30 +00:00
bootother.S add some comments 2010-08-05 21:16:55 -04:00
buf.h Another attempt at the bio.c comment. 2007-08-27 14:09:30 +00:00
BUGS sh 2007-09-05 15:55:43 +00:00
cat.c more consistent spacing 2007-08-28 18:32:08 +00:00
console.c Handle backspace on serial input and output better. Better solutions are welcome. 2009-09-30 22:32:50 -04:00
cuth delete unnecessary #include lines 2007-08-27 23:26:33 +00:00
defs.h no more pminit, or ELF header at 0x10000 2010-08-31 15:39:25 -04:00
dot-bochsrc make bochsrc work for bochs 2.2.6 2008-09-03 14:10:47 +00:00
echo.c Remove puts in favor of printf. 2007-08-24 20:03:40 +00:00
elf.h shuffle and tweak for formatting. 2009-08-08 01:07:30 -07:00
exec.c fix corner cases in exec of ELF 2010-08-06 11:12:18 -04:00
fcntl.h nit 2007-08-28 04:13:24 +00:00
file.c Initial version of single-cpu xv6 with page tables 2010-07-02 14:51:53 -04:00
file.h shuffle and tweak for formatting. 2009-08-08 01:07:30 -07:00
forktest.c Initial version of single-cpu xv6 with page tables 2010-07-02 14:51:53 -04:00
fs.c Comment typo 2009-10-24 21:31:01 -04:00
fs.h drop NADDRS and INDIRECT; too many names 2009-05-31 00:59:37 +00:00
gdbutil GDB utilities 2009-11-23 17:47:57 -05:00
grep.c add grep; add lost echo 2007-08-28 04:26:34 +00:00
ide.c Initial version of single-cpu xv6 with page tables 2010-07-02 14:51:53 -04:00
init.c group locks into structs they protect. 2009-05-31 05:12:21 +00:00
initcode.S rearrangements and cleanup for text 2009-07-11 19:26:01 -07:00
ioapic.c trap cleanup 2009-07-11 19:24:56 -07:00
kalloc.c Merge branch 'master' of git+ssh://amsterdam.csail.mit.edu/home/am0/6.828/xv6 2010-08-31 19:21:52 -04:00
kbd.c be consistent: no underscores in function names 2009-03-08 22:07:13 +00:00
kbd.h formatting; split kbd constants into kbd.h 2007-08-14 19:31:16 +00:00
kill.c tab police 2009-05-31 00:39:17 +00:00
lapic.c kill TLB shoot down code 2010-07-28 14:38:05 -04:00
LICENSE Add MIT license file; update xv6-rev2.tar.gz with LICENSE. 2009-05-26 16:58:33 +00:00
ln.c add ln 2007-08-22 05:54:55 +00:00
ls.c Remove puts in favor of printf. 2007-08-24 20:03:40 +00:00
LucidaSans-Typewriter83 add nice font 2008-08-20 18:00:24 +00:00
main.c no more pminit, or ELF header at 0x10000 2010-08-31 15:39:25 -04:00
Makefile print depends on runoff.spec 2010-08-31 17:30:31 -04:00
mkdir.c more consistent spacing 2007-08-28 18:32:08 +00:00
mkfs.c Hopefully get the printf size spec right, regardless of compiler. 2010-08-31 16:01:38 -04:00
mmu.h Page breaking of mmu.h 2010-08-31 16:54:50 -04:00
mp.c Initial version of single-cpu xv6 with page tables 2010-07-02 14:51:53 -04:00
mp.h Simplify MP hardware code. 2007-08-27 22:53:31 +00:00
Notes nit in console interrupts 2006-09-07 00:00:33 +00:00
param.h kalloc/kfree now only a page at a time 2010-08-31 12:54:47 -04:00
picirq.c shuffle and tweak for formatting. 2009-08-08 01:07:30 -07:00
pipe.c kalloc/kfree now only a page at a time 2010-08-31 12:54:47 -04:00
pr.pl remove //DOC in the right place 2009-07-12 19:07:30 -07:00
printf.c spaces around else for rtm 2007-08-28 18:37:41 +00:00
proc.c Fix too-long lines 2010-08-31 16:26:08 -04:00
proc.h fix corner cases in exec of ELF 2010-08-06 11:12:18 -04:00
README Cleanup if allocuvm fails to alloc. Add a test. 2010-08-31 21:49:49 -04:00
rm.c more consistent spacing 2007-08-28 18:32:08 +00:00
runoff Make it possible to express half-page preferences 2010-08-31 17:46:30 -04:00
runoff.list Swap bootmain.c and bootother.S. This puts the whole boot process on one spread, though it separates the two asm files. 2010-08-31 17:35:17 -04:00
runoff.spec Our proc.c alignment is perfect. Since ksegment/usegment went away, we get a column back, so we get our two action-packed spreads. 2010-08-31 17:49:47 -04:00
runoff1 remove //DOC in the right place 2009-07-12 19:07:30 -07:00
sh.c move jkstack to main.c 2010-08-05 14:15:03 -04:00
show1 PDF at http://am.lcs.mit.edu/~rsc/xv6.pdf 2007-08-22 06:01:32 +00:00
sign.pl spacing fixes: no tabs, 2-space indents (for rtm) 2006-09-06 17:04:06 +00:00
sleep1.p Model verifying that wakeup really 2007-10-12 04:21:04 +00:00
spinlock.c nits 2010-07-02 17:45:37 -04:00
spinlock.h assorted fixes: 2009-08-30 23:02:08 -07:00
spinp Model verifying that wakeup really 2007-10-12 04:21:04 +00:00
stat.h move T_DIR etc into stat.h; move type up 2009-05-31 00:26:10 +00:00
stressfs.c Add the test we used in lecture to creash the IDE system when the 2009-11-23 17:27:26 -05:00
string.c Remove memcpy prototypes at Russ' request to prevent code from calling 2009-10-07 13:06:55 -04:00
swtch.S move jkstack to main.c 2010-08-05 14:15:03 -04:00
symlink.patch symlink implementation 2007-08-30 18:36:38 +00:00
syscall.c uptime() sys call for benchmarking 2010-08-11 14:34:45 -04:00
syscall.h uptime() sys call for benchmarking 2010-08-11 14:34:45 -04:00
sysfile.c Initial version of single-cpu xv6 with page tables 2010-07-02 14:51:53 -04:00
sysproc.c uptime() sys call for benchmarking 2010-08-11 14:34:45 -04:00
timer.c shuffle and tweak for formatting. 2009-08-08 01:07:30 -07:00
toc.ftr assorted fixes: 2009-08-30 23:02:08 -07:00
toc.hdr nits 2007-08-28 18:23:48 +00:00
trap.c Fix too-long lines 2010-08-31 16:26:08 -04:00
trapasm.S initproc, usegment, swtch tweaks 2009-07-11 19:28:29 -07:00
traps.h kill TLB shoot down code 2010-07-28 14:38:05 -04:00
TRICKS more doc tweaks 2009-07-12 18:33:37 -07:00
types.h some cleanup 2010-07-25 20:30:21 -04:00
uart.c shuffle and tweak for formatting. 2009-08-08 01:07:30 -07:00
ulib.c xv6: use stosb for memset 2009-03-08 21:38:30 +00:00
umalloc.c kalloc/kfree now only a page at a time 2010-08-31 12:54:47 -04:00
user.h set only PG and WP in vminit; the rest don't seem to be needed and are confusing 2010-08-30 06:38:58 -04:00
usertests.c Cleanup if allocuvm fails to alloc. Add a test. 2010-08-31 21:49:49 -04:00
usys.S uptime() sys call for benchmarking 2010-08-11 14:34:45 -04:00
vectors.pl sync with c; .text is implied 2009-05-31 01:00:38 +00:00
vm.c Fix similar leak in copyuvm 2010-09-01 00:27:12 -04:00
wc.c more consistent spacing 2007-08-28 18:32:08 +00:00
x86.h We don't use lesp/lebp and using them at all from C would be fraught with peril. Keep resp/rebp, but fix their code style. 2010-08-31 17:07:54 -04:00
xv6-rev0.tar.gz dist tarball 2006-09-08 15:44:42 +00:00
xv6-rev1.tar.gz DO NOT MAIL: xv6-rev1 2007-08-30 14:11:21 +00:00
xv6-rev2.tar.gz Add MIT license file; update xv6-rev2.tar.gz with LICENSE. 2009-05-26 16:58:33 +00:00
xv6-rev3.tar.gz add .gdbinit.tmpl to dist 2009-09-15 19:15:59 -04:00
zombie.c delete unnecessary #include lines 2007-08-27 23:26:33 +00:00

README 

xv6 is a re-implementation of Dennis Ritchie's and Ken Thompson's Unix
Version 6 (v6).  xv6 loosely follows the structure and style of v6,
but is implemented for a modern x86-based multiprocessor using ANSI C.

ACKNOWLEDGMENTS

xv6 is inspired by John Lions's Commentary on UNIX 6th Edition (Peer
to Peer Communications; ISBN: 1-57398-013-7; 1st edition (June 14,
2000)). See also http://pdos.csail.mit.edu/6.828/2007/v6.html, which
provides pointers to on-line resources for v6.

xv6 borrows code from the following sources:
    JOS (asm.h, elf.h, mmu.h, bootasm.S, ide.c, console.c, and others)
    Plan 9 (bootother.S, mp.h, mp.c, lapic.c)
    FreeBSD (ioapic.c)
    NetBSD (console.c)

The following people made contributions:
    Russ Cox (context switching, locking)
    Cliff Frey (MP)
    Xiao Yu (MP)

In addition, we are grateful for the patches contributed by Greg
Price, Yandong Mao, and Hitoshi Mitake.

The code in the files that constitute xv6 is
Copyright 2006-2007 Frans Kaashoek, Robert Morris, and Russ Cox.

ERROR REPORTS

If you spot errors or have suggestions for improvement, please send
email to Frans Kaashoek and Robert Morris (kaashoek,rtm@csail.mit.edu). 

BUILDING AND RUNNING XV6

To build xv6 on an x86 ELF machine (like Linux or FreeBSD), run "make".
On non-x86 or non-ELF machines (like OS X, even on x86), you will
need to install a cross-compiler gcc suite capable of producing x86 ELF
binaries.  See http://pdos.csail.mit.edu/6.828/2007/tools.html.
Then run "make TOOLPREFIX=i386-jos-elf-".

To run xv6, you can use Bochs or QEMU, both PC simulators.
Bochs makes debugging easier, but QEMU is much faster. 
To run in Bochs, run "make bochs" and then type "c" at the bochs prompt.
To run in QEMU, run "make qemu".  Both log the xv6 screen output to 
standard output.

To create a typeset version of the code, run "make xv6.pdf".
This requires the "mpage" text formatting utility.
See http://www.mesa.nl/pub/mpage/.