linux-kernel - Re: Re : [PATCH] Compressed ia32 ELF file generation for loading by Gujin 1/3

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Message-ID: <m1odo4aob9.fsf@ebiederm.dsl.xmission.com>
Date:	Thu, 08 Feb 2007 04:20:10 -0700
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Etienne Lorrain <etienne_lorrain@...oo.fr>
Cc:	vgoyal@...ibm.com, "H. Peter Anvin" <hpa@...or.com>,
	linux-kernel@...r.kernel.org
Subject: Re: Re : [PATCH] Compressed ia32 ELF file generation for loading by Gujin 1/3

Etienne Lorrain <etienne_lorrain@...oo.fr> writes:

>> Currently relocation information is extracted from vmlinux and packed in
>> final bzImage after some processing. After execution of real mode code
>> and once the image is decompressed, all the relocations are performed and
>> then control is transferred to kernel.
>
>   So here you are not really using the initial ELF program header of vmlinux,
> but more the section header and my PT_LOAD section bother you, I better
> understand. You cannot really claim you are only doing standard/usual
> ELF treatment.

The difference is that a boot loader is not doing the work.  The format is.
Compiling -fPIC almost gets us there except ld has bugs processing absolute
symbols.

Anything we expect a bootloader to do need to be as close as possible to
the usual ELF treatment.

Eric
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