Unverified Commit e18048da authored by Palmer Dabbelt's avatar Palmer Dabbelt
Browse files

RISC-V: Stop emitting attributes 



The RISC-V ELF attributes don't contain any useful information.  New
toolchains ignore them, but they frequently trip up various older/mixed
toolchains.  So just turn them off.

Tested-by: default avatarConor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20230223224605.6995-1-palmer@rivosinc.com


Cc: stable@vger.kernel.org
Signed-off-by: default avatarPalmer Dabbelt <palmer@rivosinc.com>
parent fe15c26e

arch/riscv/Makefile

+7 −0
Original line number Diff line number Diff line
@@ -84,6 +84,13 @@ endif 
# Avoid generating .eh_frame sections.

KBUILD_CFLAGS += -fno-asynchronous-unwind-tables -fno-unwind-tables



# The RISC-V attributes frequently cause compatibility issues and provide no

# information, so just turn them off.

KBUILD_CFLAGS += $(call cc-option,-mno-riscv-attribute)

KBUILD_AFLAGS += $(call cc-option,-mno-riscv-attribute)

KBUILD_CFLAGS += $(call as-option,-Wa$(comma)-mno-arch-attr)

KBUILD_AFLAGS += $(call as-option,-Wa$(comma)-mno-arch-attr)



KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax)

KBUILD_AFLAGS_MODULE += $(call as-option,-Wa$(comma)-mno-relax)

arch/riscv/kernel/compat_vdso/Makefile

+4 −0
Original line number Diff line number Diff line
@@ -14,6 +14,10 @@ COMPAT_LD := $(LD) 
COMPAT_CC_FLAGS := -march=rv32g -mabi=ilp32

COMPAT_LD_FLAGS := -melf32lriscv



# Disable attributes, as they're useless and break the build.

COMPAT_CC_FLAGS += $(call cc-option,-mno-riscv-attribute)

COMPAT_CC_FLAGS += $(call as-option,-Wa$(comma)-mno-arch-attr)



# Files to link into the compat_vdso

obj-compat_vdso = $(patsubst %, %.o, $(compat_vdso-syms)) note.o