1 /*
2 +----------------------------------------------------------------------+
3 | PHP Version 7 |
4 +----------------------------------------------------------------------+
5 | Copyright (c) The PHP Group |
6 +----------------------------------------------------------------------+
7 | This source file is subject to version 3.01 of the PHP license, |
8 | that is bundled with this package in the file LICENSE, and is |
9 | available through the world-wide-web at the following url: |
10 | http://www.php.net/license/3_01.txt |
11 | If you did not receive a copy of the PHP license and are unable to |
12 | obtain it through the world-wide-web, please send a note to |
13 | license@php.net so we can mail you a copy immediately. |
14 +----------------------------------------------------------------------+
15 | Author: |
16 +----------------------------------------------------------------------+
17 */
18
19 #include "php.h"
20
21 #ifndef HAVE_EXPLICIT_BZERO
22
23 /* $OpenBSD: explicit_bzero.c,v 1.4 2015/08/31 02:53:57 guenther Exp $ */
24 /*
25 * Public domain.
26 * Written by Matthew Dempsky.
27 */
28
29 #include <string.h>
30
php_explicit_bzero(void * dst,size_t siz)31 PHPAPI void php_explicit_bzero(void *dst, size_t siz)
32 {
33 #if HAVE_EXPLICIT_MEMSET
34 explicit_memset(dst, 0, siz);
35 #elif defined(PHP_WIN32)
36 RtlSecureZeroMemory(dst, siz);
37 #elif defined(__GNUC__)
38 memset(dst, 0, siz);
39 asm __volatile__("" :: "r"(dst) : "memory");
40 #else
41 size_t i = 0;
42 volatile unsigned char *buf = (volatile unsigned char *)dst;
43
44 for (; i < siz; i ++)
45 buf[i] = 0;
46 #endif
47 }
48 #endif
49
