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| author | Jon Medhurst <tixy@yxit.co.uk> | 2011-04-06 11:17:09 +0100 |
|---|---|---|
| committer | Nicolas Pitre <nicolas.pitre@linaro.org> | 2011-04-28 23:40:54 -0400 |
| commit | 073090cb701148396b1130be81f8ac84a41f196d (patch) | |
| tree | 033428a02241173a7645e8f84f8382d0fb8eaab8 /arch/arm/include | |
| parent | cf3cc1aa9b6d0bf1750143af65829f4368d77492 (diff) | |
| download | linux-stable-073090cb701148396b1130be81f8ac84a41f196d.tar.gz linux-stable-073090cb701148396b1130be81f8ac84a41f196d.tar.bz2 linux-stable-073090cb701148396b1130be81f8ac84a41f196d.zip | |
ARM: kprobes: Fix probing of conditionally executed instructions
When a kprobe is placed onto conditionally executed ARM instructions,
many of the emulation routines used to single step them produce corrupt
register results. Rather than fix all of these cases we modify the
framework which calls them to test the relevant condition flags and, if
the test fails, skip calling the emulation code.
Signed-off-by: Jon Medhurst <tixy@yxit.co.uk>
Signed-off-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Diffstat (limited to 'arch/arm/include')
| -rw-r--r-- | arch/arm/include/asm/kprobes.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm/include/asm/kprobes.h b/arch/arm/include/asm/kprobes.h index bb8a19bd5822..e46bdd0097eb 100644 --- a/arch/arm/include/asm/kprobes.h +++ b/arch/arm/include/asm/kprobes.h @@ -39,10 +39,13 @@ typedef u32 kprobe_opcode_t; struct kprobe; typedef void (kprobe_insn_handler_t)(struct kprobe *, struct pt_regs *); +typedef unsigned long (kprobe_check_cc)(unsigned long); + /* Architecture specific copy of original instruction. */ struct arch_specific_insn { kprobe_opcode_t *insn; kprobe_insn_handler_t *insn_handler; + kprobe_check_cc *insn_check_cc; }; struct prev_kprobe { |