File: explicit_bzero.c

package info (click to toggle)
libpam-ssh 2.1%2Bds1-2
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 1,296 kB
  • ctags: 1,465
  • sloc: ansic: 16,551; makefile: 95; sh: 38
file content (40 lines) | stat: -rw-r--r-- 728 bytes parent folder | download | duplicates (6)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
/* OPENBSD ORIGINAL: lib/libc/string/explicit_bzero.c */
/*	$OpenBSD: explicit_bzero.c,v 1.1 2014/01/22 21:06:45 tedu Exp $ */
/*
 * Public domain.
 * Written by Ted Unangst
 */

#include "includes.h"

/*
 * explicit_bzero - don't let the compiler optimize away bzero
 */

#ifndef HAVE_EXPLICIT_BZERO

#ifdef HAVE_MEMSET_S

void
explicit_bzero(void *p, size_t n)
{
	(void)memset_s(p, n, 0, n);
}

#else /* HAVE_MEMSET_S */

/*
 * Indirect bzero through a volatile pointer to hopefully avoid
 * dead-store optimisation eliminating the call.
 */
static void (* volatile ssh_bzero)(void *, size_t) = bzero;

void
explicit_bzero(void *p, size_t n)
{
	ssh_bzero(p, n);
}

#endif /* HAVE_MEMSET_S */

#endif /* HAVE_EXPLICIT_BZERO */