linux-kernel - Re: [PATCH 4/6] kexec: A new system call, kexec_file

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Message-ID: <52B50BBB.9070806@zytor.com>
Date:	Fri, 20 Dec 2013 19:32:11 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
CC:	Vivek Goyal <vgoyal@...hat.com>, Torsten Duwe <duwe@....de>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	Greg KH <greg@...ah.com>, linux-kernel@...r.kernel.org,
	kexec@...ts.infradead.org, Peter Jones <pjones@...hat.com>,
	Kees Cook <keescook@...omium.org>
Subject: Re: [PATCH 4/6] kexec: A new system call, kexec_file_load, for in
 kernel kexec

On 12/20/2013 05:32 PM, Eric W. Biederman wrote:
> 
> Stuff and nonsense.  bzImage is just an ugly wrapper around an ELF
> image.
> 

Not really.  We put the ELF image in there to help Xen and presumably
kexec, but there are actually quite a few issues with it... for one
thing, as currently built there are megabytes of zeroes in it for no
good reason.

Even if you don't need the entry code, the additional metadata is
meaningful.

	-hpa


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