1#define _GNU_SOURCE
 2#include <unistd.h>
 3#include <sys/mman.h>
 4#include <errno.h>
 5#include <stdint.h>
 6#include <stdarg.h>
 7#include "syscall.h"
 8
 9static void dummy(void) { }
10weak_alias(dummy, __vm_wait);
11
12void *__mremap(void *old_addr, size_t old_len, size_t new_len, int flags, ...)
13{
14	va_list ap;
15	void *new_addr = 0;
16
17	if (new_len >= PTRDIFF_MAX) {
18		errno = ENOMEM;
19		return MAP_FAILED;
20	}
21
22	if (flags & MREMAP_FIXED) {
23		__vm_wait();
24		va_start(ap, flags);
25		new_addr = va_arg(ap, void *);
26		va_end(ap);
27	}
28
29	return (void *)syscall(SYS_mremap, old_addr, old_len, new_len, flags, new_addr);
30}
31
32weak_alias(__mremap, mremap);