From b044e687af03eb87d614d511e43d3a2951c29597 Mon Sep 17 00:00:00 2001
From: carpet-crawler <carpet_crawler@rowdydow.com>
Date: Fri, 16 Aug 2024 19:36:34 -0300
Subject: [PATCH] Add zero_call_used_regs to sodium_memzero

---
 src/libsodium/sodium/utils.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/libsodium/sodium/utils.c b/src/libsodium/sodium/utils.c
index 055c1a5f..47f2ab8e 100644
--- a/src/libsodium/sodium/utils.c
+++ b/src/libsodium/sodium/utils.c
@@ -96,6 +96,10 @@ void *alloca (size_t);
 # define MADV_DONTDUMP MADV_NOCORE
 #endif
 
+#if defined(__GNUC__) && __GNUC__ >= 11
+#  define HAVE_ZERO_CALL_USED_REGS
+#endif
+
 #ifndef DEFAULT_PAGE_SIZE
 # ifdef PAGE_SIZE
 #  define DEFAULT_PAGE_SIZE PAGE_SIZE
@@ -122,6 +126,9 @@ _sodium_dummy_symbol_to_prevent_memzero_lto(void *const  pnt,
 #endif
 /* LCOV_EXCL_STOP */
 
+#ifdef HAVE_ZERO_CALL_USED_REGS
+__attribute__((zero_call_used_regs("all")))
+#endif
 void
 sodium_memzero(void * const pnt, const size_t len)
 {