>>>>> On Fri, 25 Mar 2005 18:49:51 -0700, Bob Montgomery <[EMAIL PROTECTED]>
>>>>> 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
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