Commit graph

16 commits

Author SHA1 Message Date
Robert Morris c4cc10da7e fix corner cases in exec of ELF
put an invalid page below the stack
have fork() handle invalid pages
2010-08-06 11:12:18 -04:00
Frans Kaashoek af03ab142d a few nits
passes all tests on two-processor smp
2010-07-23 12:52:50 -04:00
Frans Kaashoek 4714c20521 Checkpoint page-table version for SMP
Includes code for TLB shootdown (which actually seems unnecessary for xv6)
2010-07-23 07:41:13 -04:00
Frans Kaashoek 40889627ba Initial version of single-cpu xv6 with page tables 2010-07-02 14:51:53 -04:00
Russ Cox 48755214c9 assorted fixes:
* rename c/cp to cpu/proc
 * rename cpu.context to cpu.scheduler
 * fix some comments
 * formatting for printout
2009-08-30 23:02:08 -07:00
Russ Cox 0aef891495 shuffle and tweak for formatting.
pdf has very good page breaks now.
would be a good copy for fall 2009.
2009-08-08 01:07:30 -07:00
Russ Cox b3bebfce8a exec tweaks 2009-07-13 09:34:45 -07:00
rsc 90bab90832 exec sanity check 2009-05-31 02:11:27 +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 71d5bf4d08 oops - broke arg counting 2007-08-30 18:19:52 +00:00
rsc c1bfbfa2f7 oops 2007-08-28 02:39:40 +00:00
rsc 558ab49f13 delete unnecessary #include lines 2007-08-27 23:26:33 +00:00
rsc 629c1fe743 Edit exec.
Do not commit to new memory image until
nothing can go wrong, avoiding bad2 case.

Be sure to allocate enough stack space for argv.

Load executable before initializing stack, to
keep ELF loops together.

Make argv loop clearer.
2007-08-27 15:17:40 +00:00
rsc 07090dd705 Remove struct uinode.
Remove type arg to mknod (assume T_DEV).
2007-08-24 20:54:23 +00:00
rsc eaea18cb9c PDF at http://am.lcs.mit.edu/~rsc/xv6.pdf
Various changes made while offline.

 + bwrite sector argument is redundant; use b->sector.
 + reformatting of files for nicer PDF page breaks
 + distinguish between locked, unlocked inodes in type signatures
 + change FD_FILE to FD_INODE
 + move userinit (nee proc0init) to proc.c
 + move ROOTDEV to param.h
 + always parenthesize sizeof argument
2007-08-22 06:01:32 +00:00
rsc f32f3638f4 Various cleanup:
- Got rid of dummy proc[0].  Now proc[0] is init.
 - Added initcode.S to exec /init, so that /init is
   just a regular binary.
 - Moved exec out of sysfile to exec.c
 - Moved code dealing with fs guts (like struct inode)
   from sysfile.c to fs.c.  Code dealing with system call
   arguments stays in sysfile.c
 - Refactored directory routines in fs.c; should be simpler.
 - Changed iget to return *unlocked* inode structure.
   This solves the lookup-then-use race in namei
   without introducing deadlocks.
   It also enabled getting rid of the dummy proc[0].
2007-08-21 19:22:08 +00:00