Commit graph

845 commits

Author SHA1 Message Date
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