MicroBlaze does not support speculative execution (CVE-2017-5753)

gcc/
	PR target/86772
	Tracking CVE-2017-5753
	* config/microblaze/microblaze.cc (TARGET_HAVE_SPECULATION_SAFE_VALUE):
	Define to speculation_save_value_not_needed

diff --git a/gcc/config/microblaze/microblaze.cc b/gcc/config/microblaze/microblaze.cc
index db8e33465a83e23ddc927ad0bc5945d34ce435a2..2ab5ada4ec9e42131656ea68bdba24a2b77c0127 100644 (file)
--- a/gcc/config/microblaze/microblaze.cc
+++ b/gcc/config/microblaze/microblaze.cc
@@ -239,6 +239,10 @@ section *sdata2_section;
 #define TARGET_HAVE_TLS true
 #endif
 
+/* MicroBlaze does not do speculative execution.  */
+#undef  TARGET_HAVE_SPECULATION_SAFE_VALUE
+#define TARGET_HAVE_SPECULATION_SAFE_VALUE speculation_safe_value_not_needed
+
 /* Return truth value if a CONST_DOUBLE is ok to be a legitimate constant.  */
 static bool
 microblaze_const_double_ok (rtx op, machine_mode mode)