[PATCH v4 3/3] arm64/efi: isolate EFI stub from the kernel proper

[Jeremy Linton]

On 10/26/2015 05:26 PM, Jeremy Linton wrote:
> On 10/08/2015 02:02 PM, Ard Biesheuvel wrote:
>> Since arm64 does not use a builtin decompressor, the EFI stub is built
>> into the kernel proper. So far, this has been working fine, but actually,
>> since the stub is in fact a PE/COFF relocatable binary that is executed
>> at an unknown offset in the 1:1 mapping provided by the UEFI firmware, we
>> should not be seamlessly sharing code with the kernel proper, which is a
>> position dependent executable linked at a high virtual offset.
>
> This patch appears to be causing a build break
>
>   STUBCPY drivers/firmware/efi/libstub/lib-sort.stub.o
> 0000000000000000 R_AARCH64_ABS64   __efistub___crc_sort
> drivers/firmware/efi/libstub/lib-sort.stub.o: absolute symbol references
> not allowed in the EFI stub
>
> __kcrctab_sort:
>      .xword    __crc_sort
>      .weak    __crc_sort
>      .text
>
>
> Which is the EXPORT_SYMBOL() in sort.c combined with !CONFIG_MODVERSIONS.

	Sorry, I that should be CONFIG_MODVERSIONS..