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| author | Masahiro Yamada <masahiroy@kernel.org> | 2022-05-27 19:01:55 +0900 |
|---|---|---|
| committer | Masahiro Yamada <masahiroy@kernel.org> | 2022-06-01 23:07:29 +0900 |
| commit | f6b66ca4f38b1169313383aec7fa0a8446205ebb (patch) | |
| tree | d2fd6a7785d73c7e4a7f0e4b4e9c58a387facdf7 /scripts/Makefile.build | |
| parent | ebd191b38c5ea177318543a08e544cf2f7df944d (diff) | |
| download | lwn-f6b66ca4f38b1169313383aec7fa0a8446205ebb.tar.gz lwn-f6b66ca4f38b1169313383aec7fa0a8446205ebb.zip | |
kbuild: rebuild multi-object modules when objtool is updated
When CONFIG_LTO_CLANG or CONFIG_X86_KERNEL_IBT is enabled, objtool for
multi-object modules is postponed until the objects are linked together.
Make sure to re-run objtool and re-link multi-object modules when
objtool is updated.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Nicolas Schier <n.schier@avm.de>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com> # LLVM-14 (x86-64)
Diffstat (limited to 'scripts/Makefile.build')
| -rw-r--r-- | scripts/Makefile.build | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/scripts/Makefile.build b/scripts/Makefile.build index a1edbfe4310b..4cb7145071b9 100644 --- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -413,13 +413,18 @@ $(obj)/modules.order: $(obj-m) FORCE $(obj)/lib.a: $(lib-y) FORCE $(call if_changed,ar) -quiet_cmd_link_multi-m = LD [M] $@ - cmd_link_multi-m = $(LD) $(ld_flags) -r -o $@ @$(patsubst %.o,%.mod,$@) $(cmd_objtool) +quiet_cmd_ld_multi_m = LD [M] $@ + cmd_ld_multi_m = $(LD) $(ld_flags) -r -o $@ @$(patsubst %.o,%.mod,$@) $(cmd_objtool) + +define rule_ld_multi_m + $(call cmd_and_savecmd,ld_multi_m) + $(call cmd,gen_objtooldep) +endef $(multi-obj-m): objtool-enabled := $(delay-objtool) $(multi-obj-m): part-of-module := y $(multi-obj-m): %.o: %.mod FORCE - $(call if_changed,link_multi-m) + $(call if_changed_rule,ld_multi_m) $(call multi_depend, $(multi-obj-m), .o, -objs -y -m) targets := $(filter-out $(PHONY), $(targets)) |