Re: Panic on dom0 shutdown

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Wed, Jan 09, 2013 at 01:50:18PM +0100, Johan Ihrén wrote:
> [...]
> > What does johani_dummy() do ? If it's just an empty function, I don't
> > understand how we can have such a call trace.
> 
> It isn't empty, I just added the dummy to the call path to see where things 
> get printed by the trace function in ddb:
> 
> int
> johani_dummy(void *arg)
> {
>       struct pintrhand *ih = arg;
>       int ret;
> 
>       ret = ih->func(ih->arg);
> #ifdef IRQ_DEBUG
>       if (ih->evtch == IRQ_DEBUG)
>           printf("pirq_interrupt irq %d ret %d\n", ih->pirq, ret);
> #endif
>       __asm volatile("nop");
>       return ret;
> }
> 
> int
> pirq_interrupt(void *arg)
> {
>       struct pintrhand *ih = arg;
>       int ret;
> 
>       ret = johani_dummy(ih)
>       return ret;
> }

It just says that a regular function call shows up in the stack
trace. it doesn't say more about an indirection through a pointer call.

it could also be that the function pointer is corrupted, and
points to bus_space_read_4()

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--