Re: [PATCH 7/7] Add support for ARM UEFI ("EFI") platforms

[Leif Lindholm]

On Wed, Apr 03, 2013 at 10:01:59PM +0200, Vladimir '??-coder/phcoder' 
Serbinenko wrote:
> > I don't see grub-mkimage currently being fully cross-platform anyway,
> > so I would (as mentioned in previous email) prefer to postpone any
> > such adjustments until the basic support is in. I have the patches
> > for it, if not entirely up to date.
> 
> grub-mkimage is fully cross-platform and is intended to be usable this
> way. If you see a problem, please tell.

Well, the straightforward relocations for EM_386 and EM_X86_64 look OK,
but much of the fiddly IA64 patching that goes on in grub-mkimagexx.c
(add_value_to_slot_* and make_trampoline) does not appear
endianess-safe to me.

Since I didn't want to have to duplicate my relocation handling
between kernel and grub-mkimage, I use kern/arm/dl.c for both.

In order to do that in an endianess-safe way, I need to be able to
export target platform information over there, as well as the
host_to_target/target_to_host macros. This would involve moving these
macros, as well as the struct image_target_desc definition, out of
grub-mkimage.c.

However, this would also make it possible to do the same for IA64,
and get rid of some code duplication between grub-mkimagexx.c and
kern/ia64/dl.c.

/
    Leif