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Improve system call support

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This commit is contained in:
Justine Tunney 2021-08-25 21:35:58 -07:00
parent 63b867bd2f
commit 3085ac7837
65 changed files with 900 additions and 544 deletions
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6
libc/runtime/mmap.c
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@ -20,6 +20,7 @@
#include "libc/bits/weaken.h"
#include "libc/calls/calls.h"
#include "libc/calls/internal.h"
#include "libc/calls/sysdebug.internal.h"
#include "libc/dce.h"
#include "libc/intrin/asan.internal.h"
#include "libc/macros.internal.h"
@ -90,7 +91,10 @@ void *mmap(void *addr, size_t size, int prot, int flags, int fd, int64_t off) {
f = flags | MAP_FIXED;
if (IsOpenbsd() && (f & MAP_GROWSDOWN)) { /* openbsd:dubstack */
dm = sys_mmap(addr, size, prot, f & ~MAP_GROWSDOWN, fd, off);
if (dm.addr == MAP_FAILED) return MAP_FAILED;
if (dm.addr == MAP_FAILED) {
SYSDEBUG("sys_mmap failed");
return MAP_FAILED;
}
}
dm = sys_mmap(addr, size, prot, f, fd, off);
if (dm.addr == MAP_FAILED || dm.addr != addr) {