Re: [patch] Kprobes ia64 qp fix

From: David Mosberger <davidm_at_napali.hpl.hp.com>
Date: 2005-05-27 04:18:09
>>>>> On Thu, 26 May 2005 10:51:45 -0700, Rusty Lynch <rusty.lynch@intel.com> said:

  Rusty> The following patch is for the 2.6.12-rc5-mm1 + my previous
  Rusty> "Kprobes ia64 cleanup" patch that fixes a bug where a kprobe still 
  Rusty> fires when the instruction is predicated off.  So given the p6=0, 
  Rusty> and we have an instruction like:

  Rusty> (p6) move loc1=0

  Rusty> we should not be triggering the kprobe.  This is handled by
  Rusty> carrying over the qp section of the original instruction into
  Rusty> the break instruction.

What about:

	(p6) cmp.eq.unc p9,p10=rX,rY

would the code handle that right?  Similary, you may want to check for
the correct handling of instructions that cannot be predicated (such
as "cover").

	--david
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Received on Thu May 26 14:19:52 2005

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