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;
-#ifdef __NR_mmap2
+#ifdef SYS_mmap2
return (void *)syscall(SYS_mmap2, start, len, prot, flags, fd, off>>12);
#else
return (void *)syscall(SYS_mmap, start, len, prot, flags, fd, off);