ARM: kprobes: Decode 16-bit Thumb PUSH and POP instructions

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These instructions are equivalent to

	stmdb sp!,{r0-r7,lr}
	ldmdb sp!,{r0-r7,pc}

and we emulate them by transforming them into the 32-bit Thumb
instructions

	stmdb r9!,{r0-r7,r8}
	ldmdb r9!,{r0-r7,r8}

This is simpler, and almost certainly executes faster, than writing
simulation functions.

Signed-off-by: Jon Medhurst <tixy@yxit.co.uk>
Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>

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Jon Medhurst 2011-07-02 16:13:29 +01:00 • committed by Tixy

parent 32818f31f8

commit fd0c8d8a48

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arch/arm/kernel/kprobes-thumb.c

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