rsc
f12551b599
inode reuse bug.
...
Suppose an inode has been used and freed.
It is left marked I_VALID (the bug).
Now ialloc comes along and reuses the
inode. It writes the new inode type to disk
and returns iget(dev, inum) to get the
cache entry. Iget sees that the inode is valid
and doesn't bother refreshing from disk.
Now when the caller iupdates, it will write
out a zero type and the file or directory has
disappeared.
2009-05-31 01:34:46 +00:00
rsc
0badeaa29f
bio.c: use struct like icache does
2009-05-31 01:29:17 +00:00
rsc
c47bc4fd54
ide.c: make names more regular
2009-05-31 01:29:01 +00:00
rsc
7b644318dd
clean up %fs %gs use
2009-05-31 01:12:08 +00:00
rsc
e97519a6d2
sync with c; .text is implied
2009-05-31 01:00:38 +00:00
rsc
ba6cd8a685
drop NADDRS and INDIRECT; too many names
2009-05-31 00:59:37 +00:00
rsc
030a47736f
tab police
2009-05-31 00:39:17 +00:00
rsc
215738336a
move fork into proc.c
2009-05-31 00:38:51 +00:00
rsc
dae9b0d48a
missed this file in last checkin
2009-05-31 00:31:20 +00:00
rsc
19333efb9e
Some proc cleanup, moving some of copyproc into allocproc.
...
Also, an experiment: use "thread-local" storage for c and cp
instead of the #define macro for curproc[cpu()].
2009-05-31 00:28:45 +00:00
rsc
0c7f483838
move T_DIR etc into stat.h; move type up
2009-05-31 00:26:10 +00:00
rsc
74afa70d30
Add serial port input/output.
...
Delete parallel port output.
Works well with qemu -nographic mode.
2009-05-31 00:24:11 +00:00
rsc
0ca9ca0c55
slight rearrangement; sleep on b not buf.
2009-05-31 00:23:00 +00:00
rsc
d827c8f3c8
Add MIT license file; update xv6-rev2.tar.gz with LICENSE.
...
Other files unchanged.
2009-05-26 16:58:33 +00:00
rsc
2157576107
be consistent: no underscores in function names
2009-03-08 22:07:13 +00:00
rsc
b7f653dc49
xv6: boot loader adjustments
...
do Bochs breakpoint and spin in bootasm.S.
not needed in bootmain too.
fix readseg bug (rounding of va).
zero segments when memsz > filesz.
no need to clear BSS in kernel main.
make bootother.S like bootasm.S
2009-03-08 21:41:30 +00:00
rsc
8220135362
xv6: use stosb for memset
2009-03-08 21:38:30 +00:00
rsc
c396d065d3
xv6/x86.h: add stosb, fix bugs in insl/outsl (rep not repne)
2009-03-08 21:27:57 +00:00
rsc
4003e9bed8
xv6/x86.h: inline assembly cleanup
2009-03-08 20:56:38 +00:00
rtm
8eb20827c2
Explain why itrunc() is OK w.r.t. crashes.
2008-10-20 18:05:48 +00:00
kolya
15a2693637
try harder to get directory refcounts right
2008-10-17 12:42:13 +00:00
kolya
f3e87bc838
make mkdir crash-safer, as noticed by many students on midterm
2008-10-16 15:18:49 +00:00
kolya
e1626709d6
free the indirect block
2008-10-16 15:00:23 +00:00
kolya
e670a48358
as rtm noticed, avoid doubly-freeing pipe page
2008-10-15 17:42:56 +00:00
kolya
deca9fef83
indent
2008-10-15 05:15:32 +00:00
kolya
c100d9ee2d
cleaner swtch.S
2008-10-15 05:14:10 +00:00
kolya
228e500a0c
save cpus.intena in sched(), so we get the right EFLAGS.IF value once a
...
timer-preempted kernel thread resumes execution in trap() after yield().
otherwise the kernel could get an arbitrary number of nested timer intrs.
2008-10-15 05:01:39 +00:00
kolya
15ce79de14
check cp->killed before returning to user from a timer interrupt
2008-10-15 04:57:02 +00:00
kolya
00ce31c09c
update .cvsignore
2008-10-15 04:54:24 +00:00
kolya
289bbef733
minor cleanup
2008-10-12 20:19:16 +00:00
kolya
f73b81205e
minor cleanup with STUB macro
2008-10-12 19:54:11 +00:00
kolya
c780dbf967
include explicitly initialized globals (int x = 0;) in cross-refs,
...
also thanks to greg price.
2008-10-12 18:45:30 +00:00
kolya
6186836d28
fix: when two names only differed in case, crossrefs only included one of them.
...
thanks to greg price.
2008-10-12 18:33:14 +00:00
rtm
2ce40d7088
be clear what the root i-number is
2008-10-08 18:57:13 +00:00
rtm
be38c8413e
document lock->locked=0 vs xchg(&lock->locked, 0)
2008-09-28 10:53:54 +00:00
kolya
0159c8bb94
trap 9 does not push ec: fix from Greg Price <price@mit.edu>
2008-09-24 18:20:56 +00:00
kolya
c7317d4dc7
always save and restore %fs, %gs to ensure old segment entries are never
...
accessible to user from the hidden CPU segment registers.
2008-09-24 01:48:31 +00:00
rtm
adcd16c3f7
restore std toolprefix
2008-09-11 10:22:01 +00:00
rtm
4651d04ad1
omit *.d from tar file
2008-09-11 10:20:40 +00:00
kaashoek
e9ae6f5cbe
add copyright notice
2008-09-09 11:42:44 +00:00
kolya
f68317533e
make bochsrc work for bochs 2.2.6
2008-09-03 14:10:47 +00:00
kolya
35a6cf84ec
make pdf, ps, tarball
2008-09-03 14:05:52 +00:00
kaashoek
e87dca5cc5
nits in index.txt
...
add slides for shell, x86 intro, x86 virtual memory (deleted JOS from slides)
2008-09-03 12:29:44 +00:00
rsc
f53494c28e
DO NOT MAIL: xv6 web pages
2008-09-03 04:50:04 +00:00
rtm
ee3f75f229
simplify growproc
2008-08-28 17:57:47 +00:00
rtm
98754d687e
avoid a bug w/ exit()
2008-08-28 00:53:24 +00:00
rtm
56082468ea
the old explanation of AP startup might have been correct, but
...
I understand this one.
2008-08-28 00:52:05 +00:00
kolya
02cc595f28
clean up circular buffers, so pipe can queue 512 bytes rather than 511
2008-08-22 00:26:22 +00:00
kolya
5c5470a2fa
fix obvious printf nits after reading through code
2008-08-21 23:24:02 +00:00
rsc
1808b2f1b3
now rev2
2008-08-20 18:00:35 +00:00
