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| author | Jon Medhurst <tixy@yxit.co.uk> | 2011-07-02 15:36:32 +0100 |
|---|---|---|
| committer | Tixy <tixy@medhuaa1.miniserver.com> | 2011-07-13 17:32:43 +0000 |
| commit | 3f92dfed6a9a5f490128c8e7cc6a64dfe412994f (patch) | |
| tree | 1d503b19d01075dfd1db1023b8d0e787f9d58bb6 /arch/arm/kernel/kprobes.h | |
| parent | 0d1a095aa1e6e2a233bfb1729e15233e77f69d54 (diff) | |
ARM: kprobes: Decode 16-bit Thumb hint instructions
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>
Diffstat (limited to 'arch/arm/kernel/kprobes.h')
| -rw-r--r-- | arch/arm/kernel/kprobes.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm/kernel/kprobes.h b/arch/arm/kernel/kprobes.h index c00681ce5cce..36e07684fe08 100644 --- a/arch/arm/kernel/kprobes.h +++ b/arch/arm/kernel/kprobes.h @@ -95,6 +95,9 @@ static inline unsigned long it_advance(unsigned long cpsr) return cpsr; } +void __kprobes kprobe_simulate_nop(struct kprobe *p, struct pt_regs *regs); +void __kprobes kprobe_emulate_none(struct kprobe *p, struct pt_regs *regs); + /* * Test if load/store instructions writeback the address register. * if P (bit 24) == 0 or W (bit 21) == 1 |