Commit 453dece5 authored by Ihor Solodrai's avatar Ihor Solodrai Committed by Alexei Starovoitov
Browse files

scripts/gen-btf.sh: Reduce log verbosity 

Remove info messages from gen-btf.sh, as they are unnecessarily
detailed and sometimes inaccurate [1].  Verbose log can be produced by
passing V=1 to make, which will set -x for the shell.

[1] https://lore.kernel.org/bpf/CAADnVQ+biTSDaNtoL=ct9XtBJiXYMUqGYLqu604C3D8N+8YH9A@mail.gmail.com/



Suggested-by: default avatarAlexei Starovoitov <ast@kernel.org>
Signed-off-by: default avatarIhor Solodrai <ihor.solodrai@linux.dev>
Link: https://lore.kernel.org/r/20251231183929.65668-1-ihor.solodrai@linux.dev


Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 1a8fa7fa

scripts/gen-btf.sh

+0 −10
Original line number Diff line number Diff line
@@ -60,28 +60,20 @@ is_enabled() { 
	grep -q "^$1=y" ${objtree}/include/config/auto.conf

}



info()

{

	printf "  %-7s %s\n" "${1}" "${2}"

}



case "${KBUILD_VERBOSE}" in

*1*)

	set -x

	;;

esac





gen_btf_data()

{

	info BTF "${ELF_FILE}"

	btf1="${ELF_FILE}.BTF.1"

	${PAHOLE} -J ${PAHOLE_FLAGS}			\

		${BTF_BASE:+--btf_base ${BTF_BASE}}	\

		--btf_encode_detached=${btf1}		\

		"${ELF_FILE}"



	info BTFIDS "${ELF_FILE}"

	${RESOLVE_BTFIDS} ${RESOLVE_BTFIDS_FLAGS}	\

		${BTF_BASE:+--btf_base ${BTF_BASE}}	\

		--btf ${btf1} "${ELF_FILE}"
@@ -95,7 +87,6 @@ gen_btf_o() 
	# SHF_ALLOC because .BTF will be part of the vmlinux image. --strip-all

	# deletes all symbols including __start_BTF and __stop_BTF, which will

	# be redefined in the linker script.

	info OBJCOPY "${btf_data}"

	echo "" | ${CC} ${CLANG_FLAGS} ${KBUILD_CFLAGS} -c -x c -o ${btf_data} -

	${OBJCOPY} --add-section .BTF=${ELF_FILE}.BTF \

		--set-section-flags .BTF=alloc,readonly ${btf_data}
@@ -113,7 +104,6 @@ gen_btf_o() 


embed_btf_data()

{

	info OBJCOPY "${ELF_FILE}.BTF"

	${OBJCOPY} --add-section .BTF=${ELF_FILE}.BTF ${ELF_FILE}



	# a module might not have a .BTF_ids or .BTF.base section

scripts/link-vmlinux.sh

+2 −1
Original line number Diff line number Diff line
@@ -205,6 +205,7 @@ if is_enabled CONFIG_KALLSYMS || is_enabled CONFIG_DEBUG_INFO_BTF; then 
fi



if is_enabled CONFIG_DEBUG_INFO_BTF; then

	info BTF .tmp_vmlinux1

	if ! ${srctree}/scripts/gen-btf.sh .tmp_vmlinux1; then

		echo >&2 "Failed to generate BTF for vmlinux"

		echo >&2 "Try to disable CONFIG_DEBUG_INFO_BTF"
@@ -265,7 +266,7 @@ fi 
vmlinux_link "${VMLINUX}"



if is_enabled CONFIG_DEBUG_INFO_BTF; then

	info OBJCOPY ${btfids_vmlinux}

	info BTFIDS ${VMLINUX}

	${RESOLVE_BTFIDS} --patch_btfids ${btfids_vmlinux} ${VMLINUX}

fi