Re: Unwind bug on out of line code called from leaf functions

From: David Mosberger <davidm_at_napali.hpl.hp.com>
Date: 2003-12-11 12:21:48
>>>>> On 26 Nov 2003 22:52:50 -0800, Jim Wilson <wilson@specifixinc.com> said:

  Jim> On Wed, 2003-11-26 at 20:28, David Mosberger wrote:

  >> gcc-3.3.2 also can handle ar.pfs clobbers, so we may just want to
  >> update the kernel code to be a bit more premissive and not insist
  >> on >= gcc-3.4.  I'm not exactly sure though when this got fixed,
  >> so somebody would have to look into that first.

  Jim> The patch is in gcc-3.3.0.  See Richard Henderson's 2003-04-26
  Jim> ia64 change in gcc.  However, that patch resulted in an ICE in
  Jim> some other cases, and unnecessary saves/restores of ar.pfs, see
  Jim> gcc PR 10681.  The patch for that is in gcc-3.3.1.  See Richard
  Jim> Henderson's 2003-06-26 change in gcc.

  Jim> It would be reasonable to just check for >= gcc-3.3 for use of
  Jim> this feature.  I wouldn't recommend using gcc-3.3.0 though.

OK, I'm changing the kernel now to check for >= gcc-3.3.

Thanks!

	--david
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Received on Wed Dec 10 20:22:45 2003

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