On Thu, Aug 11, 2022 at 04:51:57PM +0200, Ard Biesheuvel wrote: > The 'ARM\x64' magic number in the file header identifies an image as one > that implements the bare metal boot protocol, allowing the loader to > simply move the file to a suitably aligned address in memory, with > sufficient headroom for the trailing .bss segment (the required memory > size is described in the header as well). > > Note of this matters for GRUB, as it only supports EFI boot. EFI does > not care about this magic number, and nor should GRUB: this prevents us > from booting other PE linux images, such as the generic EFI zboot > decompressor, which is a pure PE/COFF image, and does not implement the > bare metal boot protocol. > > So drop the magic number check. > > Signed-off-by: Ard Biesheuvel <ardb@xxxxxxxxxx> Reviewed-by: Daniel Kiper <daniel.kiper@xxxxxxxxxx> Daniel
