diff options
| author | Jon Medhurst <tixy@linaro.org> | 2015-01-19 16:15:36 +0100 |
|---|---|---|
| committer | Jon Medhurst <tixy@linaro.org> | 2015-01-20 10:06:04 +0100 |
| commit | fb892bd0fdcb2e5eac9c105cf68def90396ed8cc (patch) | |
| tree | 193a2dd316d64e90705032e9870a7848d1be7b07 /arch/arm/probes | |
| parent | ARM: optprobes: execute instruction during restoring if possible. (diff) | |
| download | linux-fb892bd0fdcb2e5eac9c105cf68def90396ed8cc.tar.xz linux-fb892bd0fdcb2e5eac9c105cf68def90396ed8cc.zip | |
ARM: kprobes: Eliminate test code's use of BX instruction on ARMv4 CPUs
Non-T variants of ARMv4 CPUs don't support the BX instruction so
eliminate its use.
Signed-off-by: Jon Medhurst <tixy@linaro.org>
Diffstat (limited to 'arch/arm/probes')
| -rw-r--r-- | arch/arm/probes/kprobes/test-arm.c | 3 | ||||
| -rw-r--r-- | arch/arm/probes/kprobes/test-core.c | 10 |
2 files changed, 10 insertions, 3 deletions
diff --git a/arch/arm/probes/kprobes/test-arm.c b/arch/arm/probes/kprobes/test-arm.c index e72b07e8cd9a..8866aedfdea2 100644 --- a/arch/arm/probes/kprobes/test-arm.c +++ b/arch/arm/probes/kprobes/test-arm.c @@ -215,9 +215,12 @@ void kprobe_arm_test_cases(void) TEST_UNSUPPORTED("msr cpsr_f, lr") TEST_UNSUPPORTED("msr spsr, r0") +#if __LINUX_ARM_ARCH__ >= 5 || \ + (__LINUX_ARM_ARCH__ == 4 && !defined(CONFIG_CPU_32v4)) TEST_BF_R("bx r",0,2f,"") TEST_BB_R("bx r",7,2f,"") TEST_BF_R("bxeq r",14,2f,"") +#endif #if __LINUX_ARM_ARCH__ >= 5 TEST_R("clz r0, r",0, 0x0,"") diff --git a/arch/arm/probes/kprobes/test-core.c b/arch/arm/probes/kprobes/test-core.c index e495127d7571..9775de22e2ff 100644 --- a/arch/arm/probes/kprobes/test-core.c +++ b/arch/arm/probes/kprobes/test-core.c @@ -236,6 +236,8 @@ static int tests_failed; #ifndef CONFIG_THUMB2_KERNEL +#define RET(reg) "mov pc, "#reg + long arm_func(long r0, long r1); static void __used __naked __arm_kprobes_test_func(void) @@ -245,7 +247,7 @@ static void __used __naked __arm_kprobes_test_func(void) ".type arm_func, %%function \n\t" "arm_func: \n\t" "adds r0, r0, r1 \n\t" - "bx lr \n\t" + "mov pc, lr \n\t" ".code "NORMAL_ISA /* Back to Thumb if necessary */ : : : "r0", "r1", "cc" ); @@ -253,6 +255,8 @@ static void __used __naked __arm_kprobes_test_func(void) #else /* CONFIG_THUMB2_KERNEL */ +#define RET(reg) "bx "#reg + long thumb16_func(long r0, long r1); long thumb32even_func(long r0, long r1); long thumb32odd_func(long r0, long r1); @@ -494,7 +498,7 @@ static void __naked benchmark_nop(void) { __asm__ __volatile__ ( "nop \n\t" - "bx lr" + RET(lr)" \n\t" ); } @@ -977,7 +981,7 @@ void __naked __kprobes_test_case_start(void) "bic r0, lr, #1 @ r0 = inline data \n\t" "mov r1, sp \n\t" "bl kprobes_test_case_start \n\t" - "bx r0 \n\t" + RET(r0)" \n\t" ); } |