From: David Mosberger <davidm@napali.hpl.hp.com>
To: linux-ia64@vger.kernel.org
Subject: Re: Can't unwind through dispatch_illegal_op_fault
Date: Sat, 26 Mar 2005 08:38:46 +0000 [thread overview]
Message-ID: <16965.8086.78634.396687@napali.hpl.hp.com> (raw)
In-Reply-To: <1111801791.498.151.camel@localhost.localdomain>
>>>>> On Fri, 25 Mar 2005 18:49:51 -0700, Bob Montgomery <bob.montgomery@hp.com> said:
Bob> I accidentally discovered that another good way for my buncho
Bob> crash test module to oops the system is to mov from ar.bspstore
Bob> without zeroing the mode bits on ar.rsc. The resulting illegal
Bob> op doesn't unwind past dispatch_illegal_op_fault.
Bob> I'm testing on a 2.6.10 based system (with other patches), and
Bob> get the following oops message, stopping at
Bob> dispatch_illegal_op_fault. Is this a quick question for the
Bob> ivt.S folks, or should I prepare a test module for a stock
Bob> kernel?
Ah, dispatch_illegal_op_fault() is an oddball since after calling
ia64_illegal_op_fault() it does some other work and returns to
ia64_leave_kernel only at that point. Because of that, it
needs to have unwind info. Hopefully all that it needs is
a PT_REGS_UNWIND_INFO(0) after SAVE_REST.
--david
next prev parent reply other threads:[~2005-03-26 8:38 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-26 1:49 Can't unwind through dispatch_illegal_op_fault Bob Montgomery
2005-03-26 8:38 ` David Mosberger [this message]
2005-03-28 18:47 ` Bob Montgomery
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