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

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Message-ID: <47D0091E.304@adacore.com>
Date:	Thu, 06 Mar 2008 10:09:18 -0500
From:	Robert Dewar <dewar@...core.com>
To:	Olivier Galibert <galibert@...ox.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Chris Lattner <clattner@...le.com>,
	Michael Matz <matz@...e.de>,
	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

Olivier Galibert wrote:
> On Wed, Mar 05, 2008 at 05:12:07PM -0800, H. Peter Anvin wrote:
>> It's a kernel bug, and it needs to be fixed.
> 
> I'm not convinced.  It's been that way for 15 years, it's that way in
> the BSD kernels, at that point it's a feature.  The bug is in the
> documentation, nowhere else.  And in gcc for blindly trusting the
> documentation.

I agree, it reminds me of Burroughs on the 5500 believing the
Fortran standard which carefully allowed for a stack based
implementation of Fortran, Algol-style, unfortunately no real
Fortran programs worked with this semantics, and it was one of
the factors contributing the demise of the 5500.
> 
>   OG.
> 

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