linux-kernel - Re: [PATCH -tip tracing/kprobes 3/6] kprobes/x86: Fix to add __kprobes to in-kernel fault handing functions

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Date:	Fri, 4 Sep 2009 21:06:55 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Masami Hiramatsu <mhiramat@...hat.com>
Cc:	Ingo Molnar <mingo@...e.hu>, lkml <linux-kernel@...r.kernel.org>,
	systemtap <systemtap@...rces.redhat.com>,
	DLE <dle-develop@...ts.sourceforge.net>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>
Subject: Re: [PATCH -tip tracing/kprobes 3/6] kprobes/x86: Fix to add
	__kprobes to in-kernel fault handing functions

On Wed, Sep 02, 2009 at 08:58:05AM -0400, Masami Hiramatsu wrote:
> Frederic Weisbecker wrote:
> > BTW, after your patchset:
> > 
> > TEST    posttest
> >   Building modules, stage 2.
> > Error: c0101038:	2e a1 f8 b0 9e c0    	mov    %cs:0xc09eb0f8,%eax
> > Error: objdump says 6 bytes, but insn_get_length() says 10 (attr:40000)
> > make[1]: *** [posttest] Erreur 2
> > make: *** [bzImage] Erreur 2
> > make: *** Attente des tâches non terminées....
> >   MODPOST 4 modules
> > 
> > 
> > I'm cross compiling from 64 to 32 using:
> > 
> > make ARCH=x86
> > 
> > I've attached my config.
> 
> Aah, you might miss an important patch :D
> http://lkml.org/lkml/2009/8/28/367
> 
> Thank you,
> 


Well, even with this patch I have this problem occuring with
make ARCH=x86

Error: c125d65d:	0f 6f 02             	movq   (%edx),%mm0
Error: objdump says 3 bytes, but insn_get_length() says 2 (attr:0)
make[1]: *** [posttest] Erreur 2
make: *** [bzImage] Erreur 2

Hmm, may be that's because it doesn't support mmx instructions.
The whole patchset is on

git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing.git
	tracing/kprobes

Config and make V=1 log attached.

View attachment ".config" of type "text/plain" (53483 bytes)

View attachment "insn.log" of type "text/plain" (45217 bytes)