Indirect branch tracking is a hardware security feature that verifies near
indirect call/jump instructions arrive at intended targets, which are
labeled by the compiler with ENDBR opcodes. If such instructions reach
unlabeled locations, the processor raises control-protection faults.
Check the compiler is up-to-date at config time.
Signed-off-by: Yu-cheng Yu <redacted>
---
arch/x86/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 4628d4dadd34..63b878c4e4c6 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1962,6 +1962,7 @@ config X86_CET
def_bool n
depends on X86_64
depends on AS_WRUSS
+ depends on $(cc-option,-fcf-protection)
select ARCH_USES_HIGH_VMA_FLAGS
select ARCH_HAS_SHADOW_STACK
select ARCH_MAYBE_MKWRITE
--
2.21.0