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| author | Masami Hiramatsu <mhiramat@redhat.com> | 2009-08-27 13:23:04 -0400 |
|---|---|---|
| committer | Frederic Weisbecker <fweisbec@gmail.com> | 2009-08-30 03:08:26 +0200 |
| commit | f5ad31158d60946b9fd18c8a79c283a6bc432430 (patch) | |
| tree | 6276ab1eff3f88ec318c5f9346a3e37c5002b2d0 /arch/x86/kernel/kprobes.c | |
| parent | e9afe9e1b3fdbd56cca53959a2519e70db9c8095 (diff) | |
| download | linux-f5ad31158d60946b9fd18c8a79c283a6bc432430.tar.gz | |
kprobes/x86-64: Allow to reenter probe on post_handler
Allow to reenter probe on the post_handler of another probe on x86-64, because x86-64 already allows reentering int3. In that case, reentered probe just increases kp.nmissed and returns. Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Acked-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> LKML-Reference: <20090827172304.8246.4822.stgit@localhost.localdomain> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Diffstat (limited to 'arch/x86/kernel/kprobes.c')
| -rw-r--r-- | arch/x86/kernel/kprobes.c | 11 |
1 files changed, 0 insertions, 11 deletions
diff --git a/arch/x86/kernel/kprobes.c b/arch/x86/kernel/kprobes.c index e0fb615ba1e9..c5f1f117e0c0 100644 --- a/arch/x86/kernel/kprobes.c +++ b/arch/x86/kernel/kprobes.c @@ -463,17 +463,6 @@ static int __kprobes reenter_kprobe(struct kprobe *p, struct pt_regs *regs, { switch (kcb->kprobe_status) { case KPROBE_HIT_SSDONE: -#ifdef CONFIG_X86_64 - /* TODO: Provide re-entrancy from post_kprobes_handler() and - * avoid exception stack corruption while single-stepping on - * the instruction of the new probe. - */ - arch_disarm_kprobe(p); - regs->ip = (unsigned long)p->addr; - reset_current_kprobe(); - preempt_enable_no_resched(); - break; -#endif case KPROBE_HIT_ACTIVE: save_previous_kprobe(kcb); set_current_kprobe(p, regs, kcb); |