linux-kernel - Re: [patches] [PATCH] [21/22] x86_64: Extend bzImage protocol for relocatable bzImage

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Message-Id: <1177908078.30071.206.camel@localhost.localdomain>
Date:	Mon, 30 Apr 2007 14:41:18 +1000
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Jeff Garzik <jeff@...zik.org>, Andi Kleen <ak@...e.de>,
	patches@...-64.org, Vivek Goyal <vgoyal@...ibm.com>,
	linux-kernel@...r.kernel.org, "H. Peter Anvin" <hpa@...or.com>
Subject: Re: [patches] [PATCH] [21/22] x86_64: Extend bzImage protocol for
	relocatable bzImage

On Sun, 2007-04-29 at 00:24 -0700, Jeremy Fitzhardinge wrote:
> Is it possible to decompress and extract the kernel image from the
> bzImage without executing it?  Ie, is there enough information to find
> the compressed data part of the bzImage by inspection?
> 
> At some point we'll need to change the Xen domain builder to handle
> bzImage files, and it would be best if we didn't need to run them.

Almost.  See lguest's launcher code: load_bzimage().  You'll hate it 8)

Rusty.


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