#include <unistd.h>
#include <sys/mman.h>
#include <errno.h>
+#include <stdint.h>
#include <limits.h>
#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);
+static void dummy(void) { }
+weak_alias(dummy, __vm_wait);
-#define OFF_MASK ((-0x2000ULL << (8*sizeof(long)-1)) | 0xfff)
+#define UNIT SYSCALL_MMAP2_UNIT
+#define OFF_MASK ((-0x2000ULL << (8*sizeof(long)-1)) | (UNIT-1))
void *__mmap(void *start, size_t len, int prot, int flags, int fd, off_t off)
{
- void *ret;
-
if (off & OFF_MASK) {
errno = EINVAL;
return MAP_FAILED;
}
- if (flags & MAP_FIXED) __vm_lock(-1);
+ if (len >= PTRDIFF_MAX) {
+ errno = ENOMEM;
+ return MAP_FAILED;
+ }
+ if (flags & MAP_FIXED) {
+ __vm_wait();
+ }
#ifdef SYS_mmap2
- ret = (void *)syscall(SYS_mmap2, start, len, prot, flags, fd, off>>12);
+ return (void *)syscall(SYS_mmap2, start, len, prot, flags, fd, off/UNIT);
#else
- ret = (void *)syscall(SYS_mmap, start, len, prot, flags, fd, off);
+ return (void *)syscall(SYS_mmap, start, len, prot, flags, fd, off);
#endif
- if (flags & MAP_FIXED) __vm_unlock();
- return ret;
}
weak_alias(__mmap, mmap);