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| author | Ben Dooks <ben.dooks@codethink.co.uk> | 2013-11-08 19:29:26 +0100 |
|---|---|---|
| committer | Taras Kondratiuk <taras@ti.com> | 2014-04-01 15:48:23 +0200 |
| commit | 4712e17aa4b3c348cd0c7afc6370551a9193b65f (patch) | |
| tree | 9d294369d05ab751445766d2cc693102cd3bb2cb /arch | |
| parent | ARM: probes: fix instruction fetch order with <asm/opcodes.h> (diff) | |
| download | linux-4712e17aa4b3c348cd0c7afc6370551a9193b65f.tar.xz linux-4712e17aa4b3c348cd0c7afc6370551a9193b65f.zip | |
ARM: kprobes-test: use <asm/opcodes.h> for instruction accesses
Ensure we read instructions in the correct endian-ness by using
the <asm/opcodes.h> helper to transform them as necessary.
Acked-by: Jon Medhurst <tixy@linaro.org>
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
[taras.kondratiuk@linaro.org: fix next_instruction() function]
Signed-off-by: Taras Kondratiuk <taras.kondratiuk@linaro.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/kernel/kprobes-test.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/arch/arm/kernel/kprobes-test.c b/arch/arm/kernel/kprobes-test.c index c2fd06b4c389..6e60a349aed9 100644 --- a/arch/arm/kernel/kprobes-test.c +++ b/arch/arm/kernel/kprobes-test.c @@ -1333,7 +1333,8 @@ static void test_case_failed(const char *message) static unsigned long next_instruction(unsigned long pc) { #ifdef CONFIG_THUMB2_KERNEL - if ((pc & 1) && !is_wide_instruction(*(u16 *)(pc - 1))) + if ((pc & 1) && + !is_wide_instruction(__mem_to_opcode_thumb16(*(u16 *)(pc - 1)))) return pc + 2; else #endif @@ -1378,13 +1379,13 @@ static uintptr_t __used kprobes_test_case_start(const char *title, void *stack) if (test_case_is_thumb) { u16 *p = (u16 *)(test_code & ~1); - current_instruction = p[0]; + current_instruction = __mem_to_opcode_thumb16(p[0]); if (is_wide_instruction(current_instruction)) { - current_instruction <<= 16; - current_instruction |= p[1]; + u16 instr2 = __mem_to_opcode_thumb16(p[1]); + current_instruction = __opcode_thumb32_compose(current_instruction, instr2); } } else { - current_instruction = *(u32 *)test_code; + current_instruction = __mem_to_opcode_arm(*(u32 *)test_code); } if (current_title[0] == '.') |