提交 e9d54be9 编写于 作者: N Nick Desaulniers 提交者: Russell King

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/D95586Reported-by: Nkernelci.org bot <bot@kernelci.org>
Suggested-by: NPeter Smith <peter.smith@arm.com>
Suggested-by: NRenato Golin <rengolin@systemcall.eu>
Suggested-by: NDavid Spickett <david.spickett@linaro.org>
Acked-by: NArd Biesheuvel <ardb@kernel.org>
Signed-off-by: NNick Desaulniers <ndesaulniers@google.com>
Signed-off-by: NRussell King <rmk+kernel@armlinux.org.uk>
上级 08cbcb97
...@@ -166,10 +166,10 @@ void kprobe_arm_test_cases(void) ...@@ -166,10 +166,10 @@ void kprobe_arm_test_cases(void)
/* Data-processing with PC as a target and status registers updated */ /* Data-processing with PC as a target and status registers updated */
TEST_UNSUPPORTED("movs pc, r1") 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("movs pc, #0x10000")
TEST_UNSUPPORTED("adds pc, lr, r1") 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") TEST_UNSUPPORTED("adds pc, lr, #4")
/* Data-processing with SP as target */ /* Data-processing with SP as target */
......
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