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Date: Sun, 19 Nov 2006 17:55:07 +0100
To: The development of GRUB 2 <grub-devel@gnu.org>
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From: Tristan Gingold <tgingold@free.fr>
Subject: Re: multiboot2: remove "a.out kludge" requirement
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On Sun, Nov 19, 2006 at 10:26:54AM +0000, Brano Zarnovican wrote:
> On 11/17/06, Andrei E. Warkentin <andrey.warkentin@gmail.com> wrote:
> >
> >How about having a custom e_type for ELF images booted by GRUB? Something 
> >in
> 
> Guys at Xen solved it nicely with custom ELF section. Somewhere in
> your OS code you create a section with specific name, bootloader will
> be looking for. For multiboot it might look like:
> 
> .section __multiboot_v2
>        .long MAGIC_THIS
>        .long FLAGS_THAT
> 
> Header position is exactly defined in ELF which Grub already speaks.
> It does not need to be in first 8kB. The downside is that it will make
> multiboot ELF-only.
> 
> Oh. Did I mention that you can have more than one header in a single image ?
> (for non-compatible multiboot versions ;)
But using notes make it almost impossible to use a compressed image.
(This is almost a requirement for ia64, but I also think ia64 does not
require these flags).

Tristan.