ARM: kprobes: introduces checker

This patch introdces 'checker' to decoding phase, and calls checkers
when instruction decoding. This allows further decoding for specific
instructions.  This patch introduces a stub call of checkers in kprobe
arch_prepare_kprobe() as an example and for further expansion.

Signed-off-by: Wang Nan <wangnan0@huawei.com>
Reviewed-by: Jon Medhurst <tixy@linaro.org>
Reviewed-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: Jon Medhurst <tixy@linaro.org>

diff --cc arch/arm/probes/decode-arm.c
Simple merge

diff --cc arch/arm/probes/decode-arm.h
Simple merge

diff --cc arch/arm/probes/decode-thumb.c
Simple merge

diff --cc arch/arm/probes/decode-thumb.h
Simple merge

diff --cc arch/arm/probes/decode.c
Simple merge

diff --cc arch/arm/probes/decode.h
Simple merge

diff --cc arch/arm/probes/kprobes/actions-arm.c
Simple merge

diff --cc arch/arm/probes/kprobes/actions-thumb.c
Simple merge

diff --cc arch/arm/probes/kprobes/core.c
Simple merge

diff --cc arch/arm/probes/kprobes/core.h
Simple merge

diff --cc arch/arm/probes/uprobes/core.c
Simple merge