linux-kernel - Re: kgdb in git-x86#mm review

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Message-ID: <20080211161114.GA19537@one.firstfloor.org>
Date:	Mon, 11 Feb 2008 17:11:14 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	"Frank Ch. Eigler" <fche@...hat.com>
Cc:	Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org
Subject: Re: kgdb in git-x86#mm review

On Mon, Feb 11, 2008 at 10:32:46AM -0500, Frank Ch. Eigler wrote:
> Andi Kleen <andi@...stfloor.org> writes:
> 
> > [...]  The kgdb code in git-x86#mm is right now is totally broken of
> > course because the CFI annotations in assembler code are gone now,
> > but they are needed for gdb use.  [...]
> 
> This loss of CFI data is unfortunate for other potential consumers
> too, such as systemtap, which intends to supplement its current stack
> backtracing heuristics with CFI data.

They seem to have reverted these patches now, so that problem 
is gone.

Yes there are a couple of other consumers of CFI too, like crash
or the out of tree (but not dead) in kernel unwinder.

-Andi
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