ARM: kprobes: Decode 16-bit Thumb hint instructions

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For hints which may have observable effects, like SEV (send event), we
use kprobe_emulate_none which emulates the hint by executing the
original instruction.

For NOP we simulate the instruction using kprobe_simulate_nop, which
does nothing. As probes execute with interrupts disabled this is also
used for hints which may block for an indefinite time, like WFE (wait
for event).

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 15:36:32 +01:00 • committed by Tixy

parent 0d1a095aa1

commit 3f92dfed6a

3 changed files with 46 additions and 1 deletions

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9

arch/arm/kernel/kprobes-common.c

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35

arch/arm/kernel/kprobes-thumb.c

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3

arch/arm/kernel/kprobes.h

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