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Port of Xv6 for 25∞2
547 commits 1 branch 0 tags 18 MiB
C 94.5%
Assembly 3.4%
Makefile 1.9%
Perl 0.2%
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rsc ce72cadbe0 fix bug fix
2009-05-31 01:53:08 +00:00
web Add MIT license file; update xv6-rev2.tar.gz with LICENSE. 2009-05-26 16:58:33 +00:00
.cvsignore update .cvsignore 2008-10-15 04:54:24 +00:00
asm.h continuous quality management 2007-08-31 19:55:27 +00:00
bio.c bio.c: use struct like icache does 2009-05-31 01:29:17 +00:00
bootasm.S clean up %fs %gs use 2009-05-31 01:12:08 +00:00
bootmain.c xv6: boot loader adjustments 2009-03-08 21:41:30 +00:00
bootother.S xv6: boot loader adjustments 2009-03-08 21:41:30 +00:00
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 Add serial port input/output. 2009-05-31 00:24:11 +00:00
cuth delete unnecessary #include lines 2007-08-27 23:26:33 +00:00
defs.h move fork into proc.c 2009-05-31 00:38:51 +00:00
dev.h Change dev read/write functions 2007-08-28 17:49:49 +00:00
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 clumsy blank pages to make some files align better 2007-08-28 05:00:39 +00:00
exec.c Some proc cleanup, moving some of copyproc into allocproc. 2009-05-31 00:28:45 +00:00
fcntl.h nit 2007-08-28 04:13:24 +00:00
file.c remove _ from pipe; be like file 2007-08-28 04:22:35 +00:00
file.h Remove struct uinode. 2007-08-24 20:54:23 +00:00
forktest.c test that fork fails gracefully 2007-08-24 20:20:23 +00:00
fs.c fix bug fix 2009-05-31 01:53:08 +00:00
fs.h drop NADDRS and INDIRECT; too many names 2009-05-31 00:59:37 +00:00
fsvar.h drop NADDRS and INDIRECT; too many names 2009-05-31 00:59:37 +00:00
grep.c add grep; add lost echo 2007-08-28 04:26:34 +00:00
ide.c ide.c: make names more regular 2009-05-31 01:29:01 +00:00
init.c comments; rename irq_ to pic_ 2007-08-28 19:04:36 +00:00
initcode.S Rename main0 to main. 2007-08-27 23:32:16 +00:00
ioapic.c be consistent: no underscores in function names 2009-03-08 22:07:13 +00:00
kalloc.c delete unnecessary #include lines 2007-08-27 23:26:33 +00:00
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 tab police 2009-05-31 00:39:17 +00:00
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 Some proc cleanup, moving some of copyproc into allocproc. 2009-05-31 00:28:45 +00:00
Makefile Some proc cleanup, moving some of copyproc into allocproc. 2009-05-31 00:28:45 +00:00
mkdir.c more consistent spacing 2007-08-28 18:32:08 +00:00
mkfs.c drop NADDRS and INDIRECT; too many names 2009-05-31 00:59:37 +00:00
mmu.h don't call it ss - that's the stack segment 2007-09-27 16:47:50 +00:00
mp.c be consistent: no underscores in function names 2009-03-08 22:07:13 +00:00
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 simplify ide queuing 2007-08-24 19:32:36 +00:00
picirq.c be consistent: no underscores in function names 2009-03-08 22:07:13 +00:00
pipe.c as rtm noticed, avoid doubly-freeing pipe page 2008-10-15 17:42:56 +00:00
pr.pl runoff changes 2006-09-08 13:53:18 +00:00
printf.c spaces around else for rtm 2007-08-28 18:37:41 +00:00
proc.c clean up %fs %gs use 2009-05-31 01:12:08 +00:00
proc.h tab police 2009-05-31 00:39:17 +00:00
README spelling 2007-08-29 18:18:57 +00:00
rm.c more consistent spacing 2007-08-28 18:32:08 +00:00
runoff minor cleanup with STUB macro 2008-10-12 19:54:11 +00:00
runoff.list final nits 2007-08-28 19:39:49 +00:00
runoff.spec nits 2007-08-28 05:01:04 +00:00
runoff1 PDF at http://am.lcs.mit.edu/~rsc/xv6.pdf 2007-08-22 06:01:32 +00:00
sh.c clumsy cd 2007-08-30 18:30:26 +00:00
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 Some proc cleanup, moving some of copyproc into allocproc. 2009-05-31 00:28:45 +00:00
spinlock.h formatting updates 2008-08-20 18:00:13 +00:00
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
string.c xv6: use stosb for memset 2009-03-08 21:38:30 +00:00
swtch.S cleaner swtch.S 2008-10-15 05:14:10 +00:00
symlink.patch symlink implementation 2007-08-30 18:36:38 +00:00
syscall.c spaces around else for rtm 2007-08-28 18:37:41 +00:00
syscall.h Replace yield system call with sleep. 2007-08-27 13:34:35 +00:00
sysfile.c try harder to get directory refcounts right 2008-10-17 12:42:13 +00:00
sysproc.c move fork into proc.c 2009-05-31 00:38:51 +00:00
timer.c be consistent: no underscores in function names 2009-03-08 22:07:13 +00:00
toc.ftr nits 2007-08-28 19:25:04 +00:00
toc.hdr nits 2007-08-28 18:23:48 +00:00
trap.c Add serial port input/output. 2009-05-31 00:24:11 +00:00
trapasm.S clean up %fs %gs use 2009-05-31 01:12:08 +00:00
traps.h Add serial port input/output. 2009-05-31 00:24:11 +00:00
TRICKS fork minibug 2007-11-28 20:47:22 +00:00
types.h align 2007-08-24 20:27:47 +00:00
uart.c tab police 2009-05-31 00:39:17 +00:00
ulib.c xv6: use stosb for memset 2009-03-08 21:38:30 +00:00
umalloc.c spaces around else for rtm 2007-08-28 18:37:41 +00:00
user.h add struct stat decl 2007-08-28 04:20:25 +00:00
usertests.c make slow bigdir last test 2007-09-27 12:29:06 +00:00
usys.S Replace yield system call with sleep. 2007-08-27 13:34:35 +00:00
vectors.pl sync with c; .text is implied 2009-05-31 01:00:38 +00:00
wc.c more consistent spacing 2007-08-28 18:32:08 +00:00
x86.h clean up %fs %gs use 2009-05-31 01:12:08 +00:00
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.pdf make pdf, ps, tarball 2008-09-03 14:05:52 +00:00
xv6.ps make pdf, ps, tarball 2008-09-03 14:05:52 +00:00
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)

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/.