Re: Problems using psr.dd

From: David Mosberger <davidm_at_napali.hpl.hp.com>
Date: 2003-11-20 13:39:40
>>>>> On Fri, 14 Nov 2003 17:09:15 +1100, Keith Owens <kaos@sgi.com> said:

  Keith> I am unable to successfully use psr.dd on 2.4 and 2.6
  Keith> kernels.  The patches below plus the debug.c module
  Keith> demonstrate the problem.  do_trap29() sets regs->cr_ipsr.dd
  Keith> and returns.  The kernel drops through ia64_leave_kernel,
  Keith> loads the modified ipsr and does rfi.  However the same debug
  Keith> fault occurs again, as if psr.dd were being ignored.

  Keith> What am I missing?

Did you find the answer already?

I'm wondering if the problem would still occurr if the
debug-fault-triggering memory access was in a function with an empty
register frame.

	--david
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Received on Wed Nov 19 21:41:05 2003

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