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riscv/efistub: Tighten ELF relocation check

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The EFI stub makefile contains logic to ensure that the objects that
make up the stub do not contain relocations that require runtime fixups
(typically to account for the runtime load address of the executable)

On RISC-V, we also avoid GP based relocations, as they require that GP
is assigned the correct base in the startup code, which is not
implemented in the EFI stub.

So add these relocation types to the grep expression that is used to
carry out this check.

Link: https://lkml.kernel.org/r/42c63cb9-87d0-49db-9af8-95771b186684%40siemens.com
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
This commit is contained in:
Ard Biesheuvel 2024-01-16 14:52:27 +01:00
parent afb2a4fb84
commit d2baf8cc82
1 changed files with 1 additions and 1 deletions
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2
drivers/firmware/efi/libstub/Makefile
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@ -143,7 +143,7 @@ STUBCOPY_RELOC-$(CONFIG_ARM64) := R_AARCH64_ABS
# exist.
STUBCOPY_FLAGS-$(CONFIG_RISCV) += --prefix-alloc-sections=.init \
--prefix-symbols=__efistub_
STUBCOPY_RELOC-$(CONFIG_RISCV) := R_RISCV_HI20
STUBCOPY_RELOC-$(CONFIG_RISCV) := -E R_RISCV_HI20\|R_RISCV_$(BITS)\|R_RISCV_RELAX
# For LoongArch, keep all the symbols in .init section and make sure that no
# absolute symbols references exist.