First commit1.0

Signed-off-by: Mattias Andrée <maandree@kth.se>

1 files changed, 38 insertions, 0 deletions

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
+}