Re: when interrupt came, the kernel save pt_regs->eip always the same?

["pl ice" <telent997@gmail.com>]

And the prototype about irq_handler changed, the 3th parameter "struct
pt_regs" removed,How do i get the struct pt_regs in my interrupt
handler because kernel doesn't deliver to me?

2008/12/14 Zwane Mwaikambo <zwane@infradead.org>:
> On Sat, 13 Dec 2008, pl ice wrote:
>
>> HI,
>>     These day i wanted get cpu context ,when interrupt came.BUT i
>> found when interrupt came kernel saved cpu context in struct pt_regs
>> and delivered to do_IRQ ,and i print the pt_regs->eip,they alway same
>> on the same interrupt?
>>      The interrupt can come anytime,i think the eip will be very
>> different every time.BUT i debug kernel ,print eip in the function
>> do_IRQ,found it didn't run as i thought.Can anybody tell me why?
>
> If the cpu is idle, you have a higher probability that the idle function
> is in regs->eip
>
>        Zwane
>