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#include "libc.h"
9
10static void dummy(void) { }
11weak_alias(dummy, __vm_wait);
12
13void *__mremap(void *old_addr, size_t old_len, size_t new_len, int flags, ...)
14{
15	va_list ap;
16	void *new_addr = 0;
17
18	if (new_len >= PTRDIFF_MAX) {
19		errno = ENOMEM;
20		return MAP_FAILED;
21	}
22
23	if (flags & MREMAP_FIXED) {
24		__vm_wait();
25		va_start(ap, flags);
26		new_addr = va_arg(ap, void *);
27		va_end(ap);
28	}
29
30	return (void *)syscall(SYS_mremap, old_addr, old_len, new_len, flags, new_addr);
31}
32
33weak_alias(__mremap, mremap);
34