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


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