linux-kernel - Re: [patch 16/21] Xen-paravirt: Add code into head.S to handle being booted by Xen

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Message-ID: <45D3A5A4.7080804@goop.org>
Date:	Wed, 14 Feb 2007 16:13:24 -0800
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
CC:	Andi Kleen <ak@....de>, Andrew Morton <akpm@...l.org>,
	linux-kernel@...r.kernel.org, virtualization@...ts.osdl.org,
	xen-devel@...ts.xensource.com, Chris Wright <chrisw@...s-sol.org>,
	Zachary Amsden <zach@...are.com>,
	Ian Campbell <Ian.Campbell@...Source.com>
Subject: Re: [patch 16/21] Xen-paravirt: Add code into head.S to handle being
 booted by Xen

Eric W. Biederman wrote:
> Ok.  If that is all this may be a difference that makes no difference.
> binutils has a bad habit of looking at sections (which are fully
> optional) instead of segments on ET_EXEC and ET_DYN objects.  Only
> ET_REL objects (.o files) are required to have sections.
>   

The Xen domain loader will have to be changed to deal with that, which
isn't too much of a problem.

My main concern is the randomness of it, and whether it will fail in
some more harmful way on other versions of binutils.

> So I recommend for testing write a 100 line program that includes
> elf.h and reads out the note segment.  If all is well we can split
> this code out.
>   

The Xen readnotes utility is essentially that.  I'll hack it.

    J
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