# \[PATCH v2 08/27\] efi/libstub: Drop .discard.addressable from the stub objects - From: Josh Poimboeuf \ - Date: 2026-09-08 20:34:32 - List: rust-for-linux - Page: https://ratatoskr.run/rust-for-linux/2026/09/17533664 - Thread: https://ratatoskr.run/rust-for-linux/2026/09/17533657/t.md ```text On arm64, riscv and loongarch, the EFI stub objects are objcopy'd with --prefix-alloc-sections=.init, which renames every allocatable section. The .discard.addressable section is allocatable, so if STACK_FRAME_NON_STANDARD() and __ADDRESSABLE() are used, the section gets renamed and never discarded: ld: warning: orphan section `.init.discard.addressable' from `vmlinux.o' being placed in section `.init.discard.addressable' In preparation for using STACK_FRAME_NON_STANDARD() in libstub code, remove the section during objcopy. Signed-off-by: Josh Poimboeuf --- drivers/firmware/efi/libstub/Makefile | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/firmware/efi/libstub/Makefile b/drivers/firmware/efi/libstub/Makefile index 77a2b2d74f3f6..1344d08b420a2 100644 --- a/drivers/firmware/efi/libstub/Makefile +++ b/drivers/firmware/efi/libstub/Makefile @@ -155,6 +155,10 @@ STUBCOPY_FLAGS-$(CONFIG_LOONGARCH) += --prefix-alloc-sections=.init \ --prefix-symbols=__efistub_ STUBCOPY_RELOC-$(CONFIG_LOONGARCH) := R_LARCH_MARK_LA +# Drop the section created by __ADDRESSABLE() so it doesn't get prefixed. +# Its job is already done. +STUBCOPY_FLAGS-y += --remove-section=.discard.addressable + $(obj)/%.stub.o: $(obj)/%.o FORCE $(call if_changed,stubcopy) -- 2.55.0 ```