Revision tags: xv6-rev11 |
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308a3b88 |
| 31-Aug-2018 |
Frans Kaashoek <kaashoek@mit.edu> |
thanks tyfkda
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Revision tags: xv6-rev9 |
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7894fcd2 |
| 25-Aug-2016 |
Frans Kaashoek <kaashoek@mit.edu> |
Remove trailing white space with: for f in *.{h,c}; do sed -i .sed 's/[[:blank:]]*$//' $f; done (Thanks to Nicolás Wolovick)
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Revision tags: xv6-rev8, xv6-rev7, osdi12-submit, xv6-rev6, xv6-rev5 |
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1a81e38b |
| 11-Jan-2011 |
Russ Cox <rsc@swtch.com> |
make new code like old code
Variable declarations at top of function, separate from initialization.
Use == 0 instead of ! for checking pointers.
Consistent spacing around {, *, casts.
Declare 0-p
make new code like old code
Variable declarations at top of function, separate from initialization.
Use == 0 instead of ! for checking pointers.
Consistent spacing around {, *, casts.
Declare 0-parameter functions as (void) not ().
Integer valued functions return -1 on failure, 0 on success.
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Revision tags: xv6-2010, xv6-rev4, xv6-rev3 |
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82201353 |
| 08-Mar-2009 |
rsc <rsc> |
xv6: use stosb for memset
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Revision tags: xv6-2008, xv6-2007, xv6-rev1 |
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1b789e1d |
| 24-Aug-2007 |
rsc <rsc> |
Remove puts in favor of printf. Allow multiple arguments to ls.
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eaea18cb |
| 22-Aug-2007 |
rsc <rsc> |
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 + distinguis
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
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dca5b5ca |
| 10-Aug-2007 |
rsc <rsc> |
avoid assignments in declarations
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115e1774 |
| 08-Aug-2007 |
rsc <rsc> |
standardize on not using unsigned keyword
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e204d0a1 |
| 08-Aug-2007 |
rsc <rsc> |
atoi, for kill
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a059f025 |
| 08-Aug-2007 |
rsc <rsc> |
change gets to return \n, to distinguish 0-byte read from empty line
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Revision tags: symlinks, xv6-2006, xv6-rev0 |
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48b82470 |
| 06-Sep-2006 |
rsc <rsc> |
break single-line if statements
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9e9bcaf1 |
| 06-Sep-2006 |
rsc <rsc> |
standardize various * conventions
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a650c606 |
| 06-Sep-2006 |
rsc <rsc> |
spacing fixes: no tabs, 2-space indents (for rtm)
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8b58e810 |
| 23-Aug-2006 |
kaashoek <kaashoek> |
i/o redirection in sh better parsing of sh commands (copied from jos sh) cat: read from 1 if no args sbrk system call, but untested getpid system call moved locks in keyboard intr, but why do we get
i/o redirection in sh better parsing of sh commands (copied from jos sh) cat: read from 1 if no args sbrk system call, but untested getpid system call moved locks in keyboard intr, but why do we get intr w. null characters from keyboard?
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bdb66433 |
| 14-Aug-2006 |
kaashoek <kaashoek> |
set size for directories correctly in wdir and mkfs mkdir ls shows stat info for each dir entry
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d15f0d10 |
| 14-Aug-2006 |
kaashoek <kaashoek> |
start on mkdir stat
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43572072 |
| 12-Aug-2006 |
rtm <rtm> |
fix getblk to actually lock the block no more cons_put system calls usertests tests two processes writing files
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17a85657 |
| 11-Aug-2006 |
rtm <rtm> |
init creates console, opens 0/1/2, runs sh sh accepts 0-argument commands (like userfs) reads from console
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b75c11b2 |
| 16-Jul-2006 |
rsc <rsc> |
add %s to cprintf for cons_puts
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9b37d1bf |
| 16-Jul-2006 |
rsc <rsc> |
Add user.h for prototypes. Add cons_puts for cleaner output.
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5ce9751c |
| 11-Jul-2006 |
rsc <rsc> |
Changes to allow use of native x86 ELF compilers, which on my Linux 2.4 box using gcc 3.4.6 don't seem to follow the same conventions as the i386-jos-elf-gcc compilers. Can run make 'TOOLPREFIX=' or
Changes to allow use of native x86 ELF compilers, which on my Linux 2.4 box using gcc 3.4.6 don't seem to follow the same conventions as the i386-jos-elf-gcc compilers. Can run make 'TOOLPREFIX=' or edit the Makefile.
curproc[cpu()] can now be NULL, indicating that no proc is running. This seemed safer to me than having curproc[0] and curproc[1] both pointing at proc[0] potentially.
The old implementation of swtch depended on the stack frame layout used inside swtch being okay to return from on the other stack (exactly the V6 you are not expected to understand this). It also could be called in two contexts: at boot time, to schedule the very first process, and later, on behalf of a process, to sleep or schedule some other process.
I split this into two functions: scheduler and swtch.
The scheduler is now a separate never-returning function, invoked by each cpu once set up. The scheduler looks like:
scheduler() { setjmp(cpu.context);
pick proc to schedule blah blah blah
longjmp(proc.context) }
The new swtch is intended to be called only when curproc[cpu()] is not NULL, that is, only on behalf of a user proc. It does:
swtch() { if(setjmp(proc.context) == 0) longjmp(cpu.context) }
to save the current proc context and then jump over to the scheduler, running on the cpu stack.
Similarly the system call stubs are now in assembly in usys.S to avoid needing to know the details of stack frame layout used by the compiler.
Also various changes in the debugging prints.
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7837c71b |
| 06-Jul-2006 |
kaashoek <kaashoek> |
disable all interrupts when acquiring lock user program that makes a blocking system call
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8b4e2a08 |
| 01-Jul-2006 |
rtm <rtm> |
swtch saves callee-saved registers swtch idles on per-CPU stack, not on calling process's stack fix pipe bugs usertest.c tests pipes, fork, exit, close
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c41f1de5 |
| 27-Jun-2006 |
rtm <rtm> |
file descriptors pipes
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