Re: how to continue from a breakpoint in GNU/Hurd

[Luis Machado]

Hi,

On 07/16/2013 02:04 PM, Yue Lu wrote:
> Hi,
>
> thanks for you reply.
>
> On Wed, Jul 17, 2013 at 12:44 AM, Luis Machado
> > Some general thoughts...
> >
> > Can you make sure the breakpoint has been lifted from the instruction it
> > replaced? If the breakpoint has been lifted and it is still being hit, then
> > it sounds like there is some kind of instruction cache problem going on,
> > where we first need to flush the icache before resuming execution.
> >
> > If the icache is the problem, then it sounds like something the kernel
> > itself needs to address.
> >
> > Luis
>
> I don't know how to flush the icache off-hand, so I used anther way to
> bypass this issue. I set the eip to the next instruction's address to
> bypass the breakpoint ins. But problem seems doesn't go away.

I don't think the cache invalidation is something the debugger should 
do. Sounds like something the kernel would do.

When you set the EIP to some other instruction (not the breakpoint one), 
what do you see when you instruction-step? What does the EIP show after 
that?

Luis