Commit eefb8c12 authored by Dmitry Golovin's avatar Dmitry Golovin Committed by Masahiro Yamada
Browse files

x86/boot: kbuild: allow readelf executable to be specified 

Introduce a new READELF variable to top-level Makefile, so the name of
readelf binary can be specified.

Before this change the name of the binary was hardcoded to
"$(CROSS_COMPILE)readelf" which might not be present for every
toolchain.

This allows to build with LLVM Object Reader by using make parameter
READELF=llvm-readelf.

Link: https://github.com/ClangBuiltLinux/linux/issues/771


Signed-off-by: default avatarDmitry Golovin <dima@golovin.in>
Reviewed-by: default avatarNick Desaulniers <ndesaulniers@google.com>
Signed-off-by: default avatarMasahiro Yamada <masahiroy@kernel.org>
parent cf6b58ab

Makefile

+2 −1
Original line number Diff line number Diff line
@@ -414,6 +414,7 @@ STRIP = $(CROSS_COMPILE)strip 
OBJCOPY		= $(CROSS_COMPILE)objcopy

OBJDUMP		= $(CROSS_COMPILE)objdump

OBJSIZE		= $(CROSS_COMPILE)size

READELF		= $(CROSS_COMPILE)readelf

PAHOLE		= pahole

LEX		= flex

YACC		= bison
@@ -472,7 +473,7 @@ GCC_PLUGINS_CFLAGS := 
CLANG_FLAGS :=



export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC

export CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE PAHOLE LEX YACC AWK INSTALLKERNEL

export CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE READELF PAHOLE LEX YACC AWK INSTALLKERNEL

export PERL PYTHON PYTHON2 PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX

export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE

arch/x86/boot/compressed/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -103,7 +103,7 @@ vmlinux-objs-$(CONFIG_EFI_MIXED) += $(obj)/efi_thunk_$(BITS).o 
quiet_cmd_check_data_rel = DATAREL $@

define cmd_check_data_rel

	for obj in $(filter %.o,$^); do \

		${CROSS_COMPILE}readelf -S $$obj | grep -qF .rel.local && { \

		$(READELF) -S $$obj | grep -qF .rel.local && { \

			echo "error: $$obj has data relocations!" >&2; \

			exit 1; \

		} || true; \

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