- 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;
- return (void *)syscall6(__NR_mmap2, (long)start, len, prot, flags, fd, off>>12);
+ void *ret;
+
+ if (off & OFF_MASK) {
+ errno = EINVAL;
+ return MAP_FAILED;
+ }
+ if (flags & MAP_FIXED) __vm_lock(-1);
+#ifdef SYS_mmap2
+ ret = (void *)syscall(SYS_mmap2, start, len, prot, flags, fd, off>>12);
+#else
+ ret = (void *)syscall(SYS_mmap, start, len, prot, flags, fd, off);
+#endif
+ if (flags & MAP_FIXED) __vm_unlock();
+ return ret;