linux-kernel - Re: [tip:x86/asm] x86-64: Use normal ptregs stub for execve

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Message-ID: <20100127130716.GA26908@elte.hu>
Date:	Wed, 27 Jan 2010 14:07:16 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	mingo@...hat.com, hpa@...or.com, linux-kernel@...r.kernel.org,
	brgerst@...il.com, tglx@...utronix.de
Cc:	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:x86/asm] x86-64: Use normal ptregs stub for execve


* tip-bot for Brian Gerst <brgerst@...il.com> wrote:

> Commit-ID:  f19a25c872b20ae4357f72687cf3e7b0da220ee2
> Gitweb:     http://git.kernel.org/tip/f19a25c872b20ae4357f72687cf3e7b0da220ee2
> Author:     Brian Gerst <brgerst@...il.com>
> AuthorDate: Mon, 25 Jan 2010 10:47:33 -0500
> Committer:  H. Peter Anvin <hpa@...or.com>
> CommitDate: Tue, 26 Jan 2010 23:38:14 -0800
> 
> x86-64: Use normal ptregs stub for execve
> 
> Execve historically passed regs by value, so it had a seperate stub.
> This is no longer true, so change it to use a normal PTREGSCALL stub.
> 
> Signed-off-by: Brian Gerst <brgerst@...il.com>
> LKML-Reference: <1264434453-2204-1-git-send-email-brgerst@...il.com>
> Signed-off-by: H. Peter Anvin <hpa@...or.com>
> ---
>  arch/x86/kernel/entry_64.S |   17 +----------------
>  1 files changed, 1 insertions(+), 16 deletions(-)

FYI, -tip testing found that this commit breaks the grub binary on 64-bit, 
simply running /sbin/grub causes it to segfault:

[ 3145.999766] grub[6706] general protection ip:805c481 sp:ff95629c error:0 in 
grub[8048000+8c000]

i've excluded this commit for now.

	Ingo

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