From: Nick Desaulniers Date: Tue, 16 Feb 2021 19:14:46 +0000 (+0100) Subject: ARM: 9061/1: kprobes: fix UNPREDICTABLE warnings X-Git-Tag: v5.15~1177^2~10 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e9d54be9ad5ee2eed3056d8901ac4b3b115d95a5;p=platform%2Fkernel%2Flinux-starfive.git ARM: 9061/1: kprobes: fix UNPREDICTABLE warnings GNU as warns twice for this file: Warning: using r15 results in unpredictable behaviour via the Arm ARM: K1.1.1 Overview of the constraints on Armv7 UNPREDICTABLE behaviors The term UNPREDICTABLE describes a number of cases where the architecture has a feature that software must not use. Ard notes: These are selftests that aim to ensure that kprobe never attempts to replace the opcodes in question with a probe, but they are not actually executed, or expected to occur in real code. Link: https://github.com/ClangBuiltLinux/linux/issues/1271 Link: https://reviews.llvm.org/D95586 Reported-by: kernelci.org bot Suggested-by: Peter Smith Suggested-by: Renato Golin Suggested-by: David Spickett Acked-by: Ard Biesheuvel Signed-off-by: Nick Desaulniers Signed-off-by: Russell King --- diff --git a/arch/arm/probes/kprobes/test-arm.c b/arch/arm/probes/kprobes/test-arm.c index 977369f..2543106 100644 --- a/arch/arm/probes/kprobes/test-arm.c +++ b/arch/arm/probes/kprobes/test-arm.c @@ -166,10 +166,10 @@ void kprobe_arm_test_cases(void) /* Data-processing with PC as a target and status registers updated */ TEST_UNSUPPORTED("movs pc, r1") - TEST_UNSUPPORTED("movs pc, r1, lsl r2") + TEST_UNSUPPORTED(__inst_arm(0xe1b0f211) " @movs pc, r1, lsl r2") TEST_UNSUPPORTED("movs pc, #0x10000") TEST_UNSUPPORTED("adds pc, lr, r1") - TEST_UNSUPPORTED("adds pc, lr, r1, lsl r2") + TEST_UNSUPPORTED(__inst_arm(0xe09ef211) " @adds pc, lr, r1, lsl r2") TEST_UNSUPPORTED("adds pc, lr, #4") /* Data-processing with SP as target */