linux-kernel - Re: How to generate a Kerntypes file?

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Message-ID: <20090122133107.GA27592@sgi.com>
Date:	Thu, 22 Jan 2009 07:31:07 -0600
From:	Cliff Wickman <cpw@....com>
To:	jidong xiao <jidong.xiao@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: How to generate a Kerntypes file?

Hi Jason,

On Thu, Jan 22, 2009 at 06:59:34PM +0800, jidong xiao wrote:
> Hi,All,
> 
> Sometimes when I install a kernel I saw there is a Kerntypes file
> installed under /boot directory, but sometimes no, I remember when I
> install a sles9 kernel, there must be a Kerntypes file installed, but
> most of other kernels doesn't include such a Kerntypes file. This file
> is very useful for me to do some analysis, so I hope I can generate it
> every time I build a kernel. Do I need a patch for this or there are
> already some patches I can take use of?Thanks.

You had a init/kerntypes.c in sles9 and sles10. It included a lot
of basic kernel types.  It was compiled with -g to make the kerntypes.
I presume that you used the LKCD project's lcrash with the kerntypes.

If you download lkcd (lkcd.svn.sourceforge.net) you also build a
tool called dwarfextract.  It is able to pull all the structure
definitions out of a -g (CONFIG_DEBUG_INFO) kernel and any selected
modules.  That is useful with the lcrash command.

If you want to analyze your live system or a dump with the crash command
(people.redhat.com/~anderson/) you don't need the kerntypes, as you use
the -g kernel itself.  Although you may make kerntypes with dwarfextract
and use them with crash also.

-Cliff

> Regards
> Jason
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-- 
Cliff Wickman
Silicon Graphics, Inc.
cpw@....com
(651) 683-3824
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