linux-kernel - Re: arm checkstack

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Date:	Wed, 5 Nov 2008 17:13:14 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	Jörn Engel <joern@...fs.org>
Cc:	Matthieu CASTET <matthieu.castet@...rot.com>,
	Linux Arm Mailing List 
	<linux-arm-kernel@...ts.arm.linux.org.uk>,
	linux-kernel@...r.kernel.org
Subject: Re: arm checkstack

On Tuesday 04 November 2008, Jörn Engel wrote:
> On Tue, 4 November 2008 17:06:28 +0100, Matthieu CASTET wrote:
> > 
> > I wonder why the arm version of checkstack only catch stack size >= 300
> > and < 10000 [1].
> > Why doesn't it use ".*sub.*sp, sp, #([0-9]{1,8})" to catch all stack usage ?
> 
> Looks like a bug.  And it further looks like Holger just copied what
> everyone else did at the time.  And the one who started this strange
> pattern was: Arnd.
> 
> Arnd, did you have a good reason for choosing the pattern?
> 

don't really remember what I thought back then. Probably I tried to filter
out any function lower than 300 bytes as early as possible and did not think
of the >= 10000 case.

	Arnd <><
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