1/* OPENBSD ORIGINAL: lib/libc/string/explicit_bzero.c */
2/* $OpenBSD: explicit_bzero.c,v 1.1 2014/01/22 21:06:45 tedu Exp $ */
3/*
4 * Public domain.
5 * Written by Ted Unangst
6 */
7
8#include "includes.h"
9
| 1/* OPENBSD ORIGINAL: lib/libc/string/explicit_bzero.c */
2/* $OpenBSD: explicit_bzero.c,v 1.1 2014/01/22 21:06:45 tedu Exp $ */
3/*
4 * Public domain.
5 * Written by Ted Unangst
6 */
7
8#include "includes.h"
9
|
| 10/*
11 * explicit_bzero - don't let the compiler optimize away bzero
12 */
13
|
10#ifndef HAVE_EXPLICIT_BZERO
11
| 14#ifndef HAVE_EXPLICIT_BZERO
15
|
| 16#ifdef HAVE_MEMSET_S
17
18void
19explicit_bzero(void *p, size_t n)
20{
21 (void)memset_s(p, n, 0, n);
22}
23
24#else /* HAVE_MEMSET_S */
25
|
12/*
| 26/*
|
13 * explicit_bzero - don't let the compiler optimize away bzero
| 27 * Indirect bzero through a volatile pointer to hopefully avoid
28 * dead-store optimisation eliminating the call.
|
14 */
| 29 */
|
| 30static void (* volatile ssh_bzero)(void *, size_t) = bzero;
31
|
15void
16explicit_bzero(void *p, size_t n)
17{
| 32void
33explicit_bzero(void *p, size_t n)
34{
|
18 bzero(p, n);
| 35 ssh_bzero(p, n);
|
19}
| 36}
|
20#endif
| 37
38#endif /* HAVE_MEMSET_S */
39
40#endif /* HAVE_EXPLICIT_BZERO */
|
| |