linux-kernel - Re: [PATCH] x86 - 32-bit ptrace emulation mishandles 6th arg

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Date:	Sat, 10 Nov 2007 08:13:47 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Roland McGrath <roland@...hat.com>
Cc:	Jeff Dike <jdike@...toit.com>, Andrew Morton <akpm@...l.org>,
	tglx@...utronix.de, hpa@...or.com,
	Chuck Ebbert <76306.1226@...puserve.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86 - 32-bit ptrace emulation mishandles 6th arg

Roland McGrath <roland@...hat.com> writes:

> Sure has my ACK.  
> I never really understood why my old patch was not taken 2.5 years ago.

If I remember correctly the old patch back then broke some programs,
so it was reverted.

It's certainly ugly that it leaks r9 internals to ptrace.
Also it generates redundant code with CLEAR_RREGS.

-Andi
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