From 8bdc2e4929068210d523c34c0b171b51ce96057f Mon Sep 17 00:00:00 2001 From: Mattias Andrée Date: Sun, 16 Jan 2022 19:58:57 +0100 Subject: First commit MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Mattias Andrée --- libar2_earse.c | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 libar2_earse.c (limited to 'libar2_earse.c') diff --git a/libar2_earse.c b/libar2_earse.c new file mode 100644 index 0000000..905695a --- /dev/null +++ b/libar2_earse.c @@ -0,0 +1,38 @@ +/* See LICENSE file for copyright and license details. */ +#include "common.h" + + +#if defined(memset_s) +#elif defined(explicit_bzero) || defined(__OpenBSD__) +#elif defined(explicit_memset) +#else +# if defined(__GNUC__) +__attribute__((visibility("hidden"))) +# endif +void *(*const volatile libar2_internal_explicit_memset__)(void *, int, size_t) = &memset; +#endif + + +#if defined(__clang__) /* before __GNUC__ because that is also set in clang */ +# if __has_attribute(optnone) +__attribute__((optnone)) +# endif +#elif defined(__GNUC__) +# if __GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__ >= 40400 +__attribute__((optimize("O0"))) +# endif +#endif +void +libar2_earse(volatile void *mem_, size_t size) +{ + void *mem = *(void **)(void *)&mem_; +#if defined(memset_s) + memset_s(mem, size); +#elif defined(explicit_bzero) || defined(__OpenBSD__) + explicit_bzero(mem, size); +#elif defined(explicit_memset) + explicit_memset(mem, 0, size); +#else + libar2_internal_explicit_memset__(mem, 0, size); +#endif +} -- cgit v1.2.3-70-g09d2