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Date: Fri, 30 Nov 2001 13:20:41 -0500
From: Brian Gerst <bgerst@didntduck.org>
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To: Davide Libenzi <davidel@xmailserver.org>
CC: Simon Turvey <turveysp@ntlworld.com>, lkml <linux-kernel@vger.kernel.org>
Subject: Re: Generating a function call trace
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Davide Libenzi wrote:
> 
> On Fri, 30 Nov 2001, Simon Turvey wrote:
> 
> > Is it possible to arbitrarily generate (in a module say) a function call
> > trace?
> 
> gcc has builtin macros to trace back or ( on x86 ) you can simply chain
> through %esp/%ebp

That only works if you compile with frame pointers, which the kernel
turns off for performance reasons (due to register pressure on the x86).

--

				Brian Gerst
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