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| author | Masahiro Yamada <masahiroy@kernel.org> | 2024-11-14 02:45:22 +0300 |
|---|---|---|
| committer | Masahiro Yamada <masahiroy@kernel.org> | 2024-11-28 02:11:55 +0300 |
| commit | bede169618c68379e1be7ace14e8ac85b964a9ec (patch) | |
| tree | 3d8177b74f9e9d913996b1c0c5c0d84af82c0585 /scripts/Makefile.lib | |
| parent | 000e22a80de0727839bb753159ac05c8ba20c3e3 (diff) | |
| download | linux-bede169618c68379e1be7ace14e8ac85b964a9ec.tar.xz | |
kbuild: enable objtool for *.mod.o and additional kernel objects
Currently, objtool is disabled in scripts/Makefile.{modfinal,vmlinux}.
This commit moves rule_cc_o_c and rule_as_o_S to scripts/Makefile.lib
and set objtool-enabled to y there.
With this change, *.mod.o, .module-common.o, builtin-dtb.o, and
vmlinux.export.o will now be covered by objtool.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Diffstat (limited to 'scripts/Makefile.lib')
| -rw-r--r-- | scripts/Makefile.lib | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib index c0b485ab029a..01040a767c1d 100644 --- a/scripts/Makefile.lib +++ b/scripts/Makefile.lib @@ -302,14 +302,38 @@ endef # =========================================================================== # These are shared by some Makefile.* files. +objtool-enabled := y + +ifdef CONFIG_LTO_CLANG +# objtool cannot process LLVM IR. Make $(LD) covert LLVM IR to ELF here. +cmd_ld_single = $(if $(objtool-enabled), ; $(LD) $(ld_flags) -r -o $(tmp-target) $@; mv $(tmp-target) $@) +endif + quiet_cmd_cc_o_c = CC $(quiet_modtag) $@ cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< \ - $(cmd_ld_single_m) \ + $(cmd_ld_single) \ $(cmd_objtool) +define rule_cc_o_c + $(call cmd_and_fixdep,cc_o_c) + $(call cmd,checksrc) + $(call cmd,checkdoc) + $(call cmd,gen_objtooldep) + $(call cmd,gen_symversions_c) + $(call cmd,record_mcount) + $(call cmd,warn_shared_object) +endef + quiet_cmd_as_o_S = AS $(quiet_modtag) $@ cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< $(cmd_objtool) +define rule_as_o_S + $(call cmd_and_fixdep,as_o_S) + $(call cmd,gen_objtooldep) + $(call cmd,gen_symversions_S) + $(call cmd,warn_shared_object) +endef + # Copy a file # =========================================================================== # 'cp' preserves permissions. If you use it to copy a file in read-only srctree, |