linux-kernel - Re: [patch 2/2] kprobes x86

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Message-Id: <1182260670.3014.10.camel@laptopd505.fenrus.org>
Date:	Tue, 19 Jun 2007 06:44:30 -0700
From:	Arjan van de Ven <arjan@...radead.org>
To:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
Cc:	prasanna@...ibm.com, Andi Kleen <ak@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Chuck Ebbert <cebbert@...hat.com>,
	linux-kernel@...r.kernel.org, ananth@...ibm.com
Subject: Re: [patch 2/2] kprobes x86_64 quick fix mark-ro-data

On Tue, 2007-06-19 at 09:30 -0400, Mathieu Desnoyers wrote:
> * Arjan van de Ven (arjan@...radead.org) wrote:
> > On Tue, 2007-06-19 at 15:38 +0530, S. P. Prasanna wrote:
> > > This patch is a quick fix for x86_64 to enable kprobes only if DEBUG_RODATA is
> > > not configured. Since DEBUG_RODATA markes the kernel text pages as read-only.
> > 
> > 
> > it does??
> > 
> > I don't seem to be able to find this in the source code..... 
> > 

> See arch/x86_64/mm/init.c:mark_rodata_ro().

eh woops


PATCH] x86: tighten kernel image page access rights
author
Jan Beulich <jbeulich@...ell.com>

Wed, 2 May 2007 17:27:10 +0000
(19:27 +0200)
committer
Andi Kleen <andi@...il.nowhere.org>

Wed, 2 May 2007 17:27:10 +0000
(19:27 +0200)
commit
6fb14755a676282a4e6caa05a08c92db8e45cfff


changed it to include text (even though Andi vetoed that before when I
asked for it on grounds of breaking kprobes)... sounds this really wants
to be a 2nd config option to seperatedly do code and data.

-- 
if you want to mail me at work (you don't), use arjan (at) linux.intel.com
Test the interaction between Linux and your BIOS via http://www.linuxfirmwarekit.org

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