linux-kernel - Re: [PATCH v2] doc/oops-tracing: add Code: decode info

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Message-Id: <20070622112503.f1fa10b0.randy.dunlap@oracle.com>
Date:	Fri, 22 Jun 2007 11:25:03 -0700
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	Andi Kleen <ak@...e.de>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	akpm <akpm@...ux-foundation.org>
Subject: Re: [PATCH v2] doc/oops-tracing: add Code: decode info

On Fri, 22 Jun 2007 19:23:02 +0200 Andi Kleen wrote:

> On Friday 22 June 2007 18:44, Randy Dunlap wrote:
> > On Fri, 22 Jun 2007 16:26:39 +0200 Andi Kleen wrote:
> > > On Friday 22 June 2007 07:51:08 Randy Dunlap wrote:
> > > > From: Randy Dunlap <randy.dunlap@...cle.com>
> > > >
> > > > Add info that the Code: bytes line contains <xy> or (wxyz) in some
> > > > architecture oops reports and what that means.
> > > >
> > > > Add URL for a script by Andi Kleen that reads the Code: line from an
> > > > Oops report file and generates assembly code from the hex bytes.
> > > > (This script does not handle Code: lines that contain <xy> or (wxyz)
> > > > markings.)
> > >
> > > Should probably fix that and put it into scripts/ then
> >
> > From: Randy Dunlap <randy.dunlap@...cle.com>
> 
> Thanks.
> 
> >
> > +*Code:*)
> > +	echo $i
> > +	echo -n "	.byte 0x" > $T.s
> > +	echo $i | sed -e 's/.*Code: //;s/ [<(]/ /;s/[>)] / /;s/ /,0x/g' >> $T.s
> > +	as -o $T.o $T.s
> > +	objdump -S $T.o
> 
> This still has a couple of problems:
> 
> - The <> information is lost. It would be better to split and run 
> objdump three times and insert a marker

Why 3 times?  Why not just (1) everything before marker and
(2) everything at and after marker?

> - It won't handle multiline Code:s which i386 likes to generate now I think

I don't see the code in arch/i386/kernel/traps.c generating multiline
Code:s, just very long single lines.

---
~Randy
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