diff options
Diffstat (limited to 'src/mman/mmap.c')
| -rw-r--r-- | src/mman/mmap.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/src/mman/mmap.c b/src/mman/mmap.c index 883acb28..fd2bb07e 100644 --- a/src/mman/mmap.c +++ b/src/mman/mmap.c @@ -5,16 +5,25 @@ #include "syscall.h" #include "libc.h" +static void dummy1(int x) { } +static void dummy0(void) { } +weak_alias(dummy1, __vm_lock); +weak_alias(dummy0, __vm_unlock); + void *__mmap(void *start, size_t len, int prot, int flags, int fd, off_t off) { + void *ret; if (sizeof(off_t) > sizeof(long)) if (((long)off & 0xfff) | ((long)((unsigned long long)off>>(12 + 8*(sizeof(off_t)-sizeof(long)))))) start = (void *)-1; + if (flags & MAP_FIXED) __vm_lock(-1); #ifdef SYS_mmap2 - return (void *)syscall(SYS_mmap2, start, len, prot, flags, fd, off>>12); + ret = (void *)syscall(SYS_mmap2, start, len, prot, flags, fd, off>>12); #else - return (void *)syscall(SYS_mmap, start, len, prot, flags, fd, off); + ret = (void *)syscall(SYS_mmap, start, len, prot, flags, fd, off); #endif + if (flags & MAP_FIXED) __vm_unlock(); + return ret; } weak_alias(__mmap, mmap); |