diff options
| author | Wang Nan <wangnan0@huawei.com> | 2015-01-05 19:29:21 +0800 |
|---|---|---|
| committer | Jon Medhurst <tixy@linaro.org> | 2015-01-13 16:10:06 +0000 |
| commit | 6624cf651f1a14363d0385f36dc255d304ac7ebb (patch) | |
| tree | 38cb38d33f5faa96e36814caa3fa63bfe322c193 /arch/arm/probes/decode.c | |
| parent | 83803d97dae1eaf6850a45ef8ee179cc66e147dc (diff) | |
| download | linux-6624cf651f1a14363d0385f36dc255d304ac7ebb.tar.bz2 | |
ARM: kprobes: collects stack consumption for store instructions
This patch uses the previously introduced checker functionality on
store instructions to record their stack consumption information to
arch_probes_insn.
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Reviewed-by: Jon Medhurst <tixy@linaro.org>
Signed-off-by: Jon Medhurst <tixy@linaro.org>
Diffstat (limited to 'arch/arm/probes/decode.c')
| -rw-r--r-- | arch/arm/probes/decode.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/arm/probes/decode.c b/arch/arm/probes/decode.c index c7d442018902..f9d7c423f2cc 100644 --- a/arch/arm/probes/decode.c +++ b/arch/arm/probes/decode.c @@ -425,6 +425,16 @@ probes_decode_insn(probes_opcode_t insn, struct arch_probes_insn *asi, */ probes_opcode_t origin_insn = insn; + /* + * stack_space is initialized to 0 here. Checker functions + * should update is value if they find this is a stack store + * instruction: positive value means bytes of stack usage, + * negitive value means unable to determine stack usage + * statically. For instruction doesn't store to stack, checker + * do nothing with it. + */ + asi->stack_space = 0; + if (emulate) insn = prepare_emulated_insn(insn, asi, thumb); |