[Crash-utility] [PATCH v4 1/3] arm64: more improvement of bt -f

[Dave Anderson]

----- Original Message -----
> On Wed, Jun 22, 2016 at 01:35:02PM +0900, AKASHI Takahiro wrote:
... [ cut ] ...
> > +			if (!arm64_on_irq_stack(bt->tc->processor, fp))
> 
> Obviously I meant "if (arm64_on_irq_stack(bt->tc->processor,fp))"
> 
> > +				/*
> > +				 * Very rare corner case:
> > +				 * We have already exited an irq handler,
> > +				 * and switched from IRQ stack to process
> > +				 * stack but fp is not yet restored.
> > +				 * Fp still points to IRQ stack, sigh.
> > +				 * For example,
> > +				 *   ret_to_user() after irq_handler in el0_irq
> > +				 */
> > +				frame->sp = bt->stacktop
> > +					    - sizeof(struct arm64_pt_regs)
> > +					    - 0x10;
> 
> Anyhow, this logic seems to still have some bug.
> I will try to fix it.
> 
> Sorry for any confusion.
> -Takahiro AKASHI

No problem -- I'll await v5.

Thanks,
  Dave