+#define _GNU_SOURCE
#include <unistd.h>
#include <sys/mman.h>
#include <errno.h>
#include <stdint.h>
#include <stdarg.h>
#include "syscall.h"
-#include "libc.h"
+
+static void dummy(void) { }
+weak_alias(dummy, __vm_wait);
void *__mremap(void *old_addr, size_t old_len, size_t new_len, int flags, ...)
{
va_list ap;
- void *new_addr;
+ void *new_addr = 0;
if (new_len >= PTRDIFF_MAX) {
errno = ENOMEM;
return MAP_FAILED;
}
- va_start(ap, flags);
- new_addr = va_arg(ap, void *);
- va_end(ap);
+ if (flags & MREMAP_FIXED) {
+ __vm_wait();
+ va_start(ap, flags);
+ new_addr = va_arg(ap, void *);
+ va_end(ap);
+ }
return (void *)syscall(SYS_mremap, old_addr, old_len, new_len, flags, new_addr);
}