From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Mosberger <davidm@napali.hpl.hp.com>
Date: Wed, 05 May 2004 23:38:25 +0000
Subject: Re: 2.6.5 unwind problem with rp <- r0
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List-Id: <linux-ia64.vger.kernel.org>
References: <4885.1083211711@kao2.melbourne.sgi.com>
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To: linux-ia64@vger.kernel.org

>>>>> On Wed, 05 May 2004 10:04:58 +1000, Keith Owens <kaos@sgi.com> said:

  Keith> This ugly kludge handles unwinding from a value in r0.  It
  Keith> gets the kernel unwinder working again, until it can be
  Keith> replaced by libunwind.

I hate kludges.

An alternative that might make you happy: in kernel_thread(),
initialize regs.sw.r4 to 0, then change start_kernel_thread's
prologue to:

	.prologue
	.save rp, r4
	.body

Want to try this?

	--david