1 /*
2 * Support file for nvptx in newlib.
3 * Copyright (c) 2016-2018 Mentor Graphics.
4 *
5 * The authors hereby grant permission to use, copy, modify, distribute,
6 * and license this software and its documentation for any purpose, provided
7 * that existing copyright notices are retained in all copies and that this
8 * notice is included verbatim in any distributions. No written agreement,
9 * license, or royalty fee is required for any of the authorized uses.
10 * Modifications to this software may be copyrighted by their authors
11 * and need not follow the licensing terms described here, provided that
12 * the new terms are clearly indicated on the first page of each file where
13 * they apply.
14 */
15
16 #include <stdlib.h>
17
18 void *
realloc(void * old_ptr,size_t new_size)19 realloc (void *old_ptr, size_t new_size)
20 {
21 void *new_ptr = malloc (new_size);
22
23 if (old_ptr && new_ptr)
24 {
25 size_t old_size = *(size_t *)((long long *)old_ptr - 1);
26 size_t copy_size = old_size > new_size ? new_size : old_size;
27 __builtin_memcpy (new_ptr, old_ptr, copy_size);
28 free (old_ptr);
29 }
30
31 return new_ptr;
32 }
33
