tgingold@free.fr writes:

>   During work on EFI, I have written a standalone ELF to PE/COFF converted.  I
>   still have to mark it work within the grub framework.  Not a lot of work but
>   it requires a few hours.

IIRC, we already have a ELF to PE/COFF converter in GRUB.  Look at 
util/i386/efi/grub-mkimage.c .

If not, I have one written for GNUFI that could be used.  

~j