From: Georg-Johann Lay <avr@gjlay.de>
Date: Thu, 23 Nov 2023 18:02:47 +0000 (+0100)
Subject: AVR: PR target/86776: Implement CVE-2017-5753.
X-Git-Tag: basepoints/gcc-15~4343
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=9a3c40af7f7dd218cc2ebaa3a70f3317f7316ceb;p=thirdparty%2Fgcc.git

AVR: PR target/86776: Implement CVE-2017-5753.

gcc/
	PR target/86776
	* config/avr/avr.cc (TARGET_HAVE_SPECULATION_SAFE_VALUE): Define
	to speculation_safe_value_not_needed.
---

diff --git a/gcc/config/avr/avr.cc b/gcc/config/avr/avr.cc
index c3e0995dfc3b..a297f4e092a8 100644
--- a/gcc/config/avr/avr.cc
+++ b/gcc/config/avr/avr.cc
@@ -15309,6 +15309,12 @@ avr_float_lib_compare_returns_bool (machine_mode mode, enum rtx_code)
 #undef  TARGET_CANONICALIZE_COMPARISON
 #define TARGET_CANONICALIZE_COMPARISON avr_canonicalize_comparison
 
+/* According to the opening comment in PR86772, the following applies:
+  "If the port does not (and never will in the future) need to mitigate
+   against unsafe speculation."  */
+#undef  TARGET_HAVE_SPECULATION_SAFE_VALUE
+#define TARGET_HAVE_SPECULATION_SAFE_VALUE speculation_safe_value_not_needed
+
 struct gcc_target targetm = TARGET_INITIALIZER;