From 7a52baf2805fbb954a8db98921253a1c288efeb2 Mon Sep 17 00:00:00 2001 From: "Bjoern A. Zeeb" Date: Tue, 2 Apr 2024 09:30:49 +0000 Subject: [PATCH] LinuxKPI: implement memzero_explicit() Sponsored by: The FreeBSD Foundation Reviewed by: emaste Differential Revision: https://reviews.freebsd.org/D44586 (cherry picked from commit 218b2ccf8cc90698487515c681f3e3453b0dcead) --- sys/compat/linuxkpi/common/include/linux/string.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/sys/compat/linuxkpi/common/include/linux/string.h b/sys/compat/linuxkpi/common/include/linux/string.h index f745c2f6d34..06dcdbd9766 100644 --- a/sys/compat/linuxkpi/common/include/linux/string.h +++ b/sys/compat/linuxkpi/common/include/linux/string.h @@ -273,4 +273,11 @@ memcpy_and_pad(void *dst, size_t dstlen, const void *src, size_t len, int ch) memset(_ptr + _o, _c, sizeof(*(ptr)) - _o); \ }) +static inline void +memzero_explicit(void *p, size_t s) +{ + memset(p, 0, s); + __asm__ __volatile__("": :"r"(p) :"memory"); +} + #endif /* _LINUXKPI_LINUX_STRING_H_ */