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
dummy(void)9 static void dummy(void) { }
10 weak_alias(dummy, __vm_wait);
11
__mremap(void * old_addr,size_t old_len,size_t new_len,int flags,...)12 void *__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
32 weak_alias(__mremap, mremap);
33