Messages in this thread Patch in this message | | | Date | Sun, 30 Dec 2012 16:47:19 +0100 | From | Oleg Nesterov <> | Subject | [PATCH 1/2] uprobes/x86: Change __skip_sstep() to actually skip the whole insn |
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__skip_sstep() doesn't update regs->ip. Currently this is correct but only "by accident" and it doesn't skip the whole insn. Change it to advance ->ip by the length of the detected 0x66*0x90 sequence.
Signed-off-by: Oleg Nesterov <oleg@redhat.com> --- arch/x86/kernel/uprobes.c | 5 ++++- 1 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/arch/x86/kernel/uprobes.c b/arch/x86/kernel/uprobes.c index c71025b..4e33a35 100644 --- a/arch/x86/kernel/uprobes.c +++ b/arch/x86/kernel/uprobes.c @@ -680,8 +680,11 @@ static bool __skip_sstep(struct arch_uprobe *auprobe, struct pt_regs *regs) if (auprobe->insn[i] == 0x66) continue; - if (auprobe->insn[i] == 0x90) + if (auprobe->insn[i] == 0x90) { + regs->ip = uprobe_get_swbp_addr(regs); + regs->ip += i + 1; return true; + } break; } -- 1.5.5.1
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