[PATCH 0/3] efi: arm64: use -fpie for building the stub

[Ard Biesheuvel]

On 18 May 2017 at 10:09, Ard Biesheuvel <ard.biesheuvel at linaro.org> wrote:
> Clang requires the stub to be built with -fpie, or it may emit absolute
> symbol references that trigger the absolute relocation detection code and
> cause the build to fail.
>
> The remedy is to set -fpie (#3), but due to stupid ELF symbol preemption
> rules that only apply to shared libraries, this will result in more rather
> than fewer absolute references (i.e., GOT entries), which we have to massage
> away using visibility overrides first. (#1, #2)
>
> Ard Biesheuvel (3):
>   efi/libstub: arm64: use hidden attribute for struct screen_info
>     reference
>   efi/libstub: arm64: force 'hidden' visibility for section markers
>   efi/libstub: arm64: set -fpie when building the EFI stub
>
>  arch/arm64/include/asm/efi.h              |  3 +++
>  drivers/firmware/efi/libstub/Makefile     |  2 +-
>  drivers/firmware/efi/libstub/arm64-stub.c | 10 +++++++++-
>  3 files changed, 13 insertions(+), 2 deletions(-)
>

I have queued these in efi/next, with Matthias's Tested-by