linux-kernel - when interrupt came, the kernel save pt

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Message-ID: <41d311580812130748o262fdb31se647e840977d90a9@mail.gmail.com>
Date:	Sat, 13 Dec 2008 23:48:07 +0800
From:	"pl ice" <telent997@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: when interrupt came, the kernel save pt_regs->eip always the same?

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?


sincerely yours
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