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author | rtm <rtm> | 2006-07-01 21:26:01 +0000 |
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committer | rtm <rtm> | 2006-07-01 21:26:01 +0000 |
commit | 8b4e2a08febc8b957b44732dbc7da831479a0005 (patch) | |
tree | 46c3b079ec65f0efbd1f3b603f1b11a3ae09e56d /ulib.c | |
parent | f7cea12b38a86e9b37fa5bc635310d3f85e5f8db (diff) | |
download | xv6-labs-8b4e2a08febc8b957b44732dbc7da831479a0005.tar.gz xv6-labs-8b4e2a08febc8b957b44732dbc7da831479a0005.tar.bz2 xv6-labs-8b4e2a08febc8b957b44732dbc7da831479a0005.zip |
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
Diffstat (limited to 'ulib.c')
-rw-r--r-- | ulib.c | 14 |
1 files changed, 14 insertions, 0 deletions
@@ -5,6 +5,13 @@ fork() asm("int $48"); } +int +exit() +{ + asm("mov $2, %eax"); + asm("int $48"); +} + void cons_putc(int c) { @@ -42,3 +49,10 @@ write(int fd, char *buf, int n) asm("mov $6, %eax"); asm("int $48"); } + +int +close(int fd) +{ + asm("mov $8, %eax"); + asm("int $48"); +} |