diff options
Diffstat (limited to 'crypto/openssh/openbsd-compat/explicit_bzero.c')
| -rw-r--r-- | crypto/openssh/openbsd-compat/explicit_bzero.c | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/crypto/openssh/openbsd-compat/explicit_bzero.c b/crypto/openssh/openbsd-compat/explicit_bzero.c index b106741..3c85a48 100644 --- a/crypto/openssh/openbsd-compat/explicit_bzero.c +++ b/crypto/openssh/openbsd-compat/explicit_bzero.c @@ -7,14 +7,34 @@ #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 */ + /* - * explicit_bzero - don't let the compiler optimize away bzero + * 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) { - bzero(p, n); + ssh_bzero(p, n); } -#endif + +#endif /* HAVE_MEMSET_S */ + +#endif /* HAVE_EXPLICIT_BZERO */ |
