linux-kernel - Re: RELEASE BLOCKER: Linux doesn't follow x86/x86-64 ABI wrt direction flag

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Message-ID: <Pine.LNX.4.64.0803052258530.20583@wotan.suse.de>
Date:	Wed, 5 Mar 2008 22:59:21 +0100 (CET)
From:	Michael Matz <matz@...e.de>
To:	Chris Lattner <clattner@...le.com>
Cc:	"H.Peter Anvin" <hpa@...or.com>,
	Richard Guenther <richard.guenther@...il.com>,
	Joe Buck <Joe.Buck@...opsys.com>, Jan Hubicka <hubicka@....cz>,
	Aurelien Jarno <aurelien@...el32.net>,
	linux-kernel@...r.kernel.org, gcc@....gnu.org
Subject: Re: RELEASE BLOCKER: Linux doesn't follow x86/x86-64 ABI wrt direction
 flag

Hi,

On Wed, 5 Mar 2008, Chris Lattner wrote:

> 
> On Mar 5, 2008, at 1:34 PM, H. Peter Anvin wrote:
> 
> >Richard Guenther wrote:
> > >We didn't yet run into this issue and build openSUSE with 4.3 since more
> > >than
> > >three month.
> >
> >Well, how often do you take a trap inside an overlapping memmove()?
> 
> How hard is it to change the kernel signal entry path from "pushf" to
> "pushf;cld"?  Problem solved, no?

The problem is with old kernels, which by definition stay unfixed.


Ciao,
Michael.
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