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 <[email protected]> Reviewed-by: Kees Cook <[email protected]> --- arch/x86/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index cafa4a2c1d2d..5e157031bf82 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -1963,6 +1963,7 @@ config X86_CET def_bool n depends on AS_WRUSS depends on ARCH_HAS_SHADOW_STACK + depends on $(cc-option,-fcf-protection) select ARCH_USES_HIGH_VMA_FLAGS select ARCH_MAYBE_MKWRITE select ARCH_USE_GNU_PROPERTY -- 2.21.0
