On Thu, Oct 13, 2011 at 03:11:37PM +0530, Ananth N Mavinakayanahalli wrote:
> On Thu, Oct 13, 2011 at 02:37:49PM +0530, Maneesh Soni wrote:
>
> ...
>
> I know nothing of MIPS internals, but...
>
> > static int __kprobes kprobe_handler(struct pt_regs *regs)
> > @@ -239,8 +531,13 @@ static int __kprobes kprobe_handler(struct pt_regs *regs)
> > save_previous_kprobe(kcb);
> > set_current_kprobe(p, regs, kcb);
> > kprobes_inc_nmissed_count(p);
> > - prepare_singlestep(p, regs);
> > + prepare_singlestep(p, regs, kcb);
> > kcb->kprobe_status = KPROBE_REENTER;
> > + if (kcb->flags & SKIP_DELAYSLOT) {
> > + resume_execution(p, regs, kcb);
> > + restore_previous_kprobe(kcb);
> > + preempt_enable_no_resched();
> > + }
> > return 1;
> > } else {
> > if (addr->word != breakpoint_insn.word) {
> > @@ -284,8 +581,15 @@ static int __kprobes kprobe_handler(struct pt_regs *regs)
> > }
> >
> > ss_probe:
> > - prepare_singlestep(p, regs);
> > - kcb->kprobe_status = KPROBE_HIT_SS;
> > + prepare_singlestep(p, regs, kcb);
> > + if (kcb->flags & SKIP_DELAYSLOT) {
> > + kcb->kprobe_status = KPROBE_HIT_SSDONE;
> > + if (p->post_handler)
> > + p->post_handler(p, regs, 0);
> > + resume_execution(p, regs, kcb);
>
> You are missing a preempt_disable_no_resched() here.
Oops! I meant preempt_enable_no_resched().
Ananth
