diff options
Diffstat (limited to 'scripts/Makefile.build')
| -rw-r--r-- | scripts/Makefile.build | 63 |
1 files changed, 36 insertions, 27 deletions
diff --git a/scripts/Makefile.build b/scripts/Makefile.build index 3efc984d4c69..78656b527fe5 100644 --- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -155,7 +155,7 @@ $(obj)/%.ll: $(src)/%.c FORCE # (See cmd_cc_o_c + relevant part of rule_cc_o_c) quiet_cmd_cc_o_c = CC $(quiet_modtag) $@ - cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< + cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< $(cmd_objtool) ifdef CONFIG_MODVERSIONS # When module versioning is enabled the following steps are executed: @@ -224,27 +224,38 @@ cmd_record_mcount = $(if $(findstring $(strip $(CC_FLAGS_FTRACE)),$(_c_flags)), endif # CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT ifdef CONFIG_STACK_VALIDATION -ifndef CONFIG_LTO_CLANG -__objtool_obj := $(objtree)/tools/objtool/objtool +objtool := $(objtree)/tools/objtool/objtool + +objtool_args = \ + $(if $(CONFIG_UNWINDER_ORC),orc generate,check) \ + $(if $(part-of-module), --module) \ + $(if $(CONFIG_FRAME_POINTER),, --no-fp) \ + $(if $(CONFIG_GCOV_KERNEL)$(CONFIG_LTO_CLANG), --no-unreachable)\ + $(if $(CONFIG_RETPOLINE), --retpoline) \ + $(if $(CONFIG_X86_SMAP), --uaccess) \ + $(if $(CONFIG_FTRACE_MCOUNT_USE_OBJTOOL), --mcount) + +cmd_objtool = $(if $(objtool-enabled), ; $(objtool) $(objtool_args) $@) +cmd_gen_objtooldep = $(if $(objtool-enabled), { echo ; echo '$@: $$(wildcard $(objtool))' ; } >> $(dot-target).cmd) + +endif # CONFIG_STACK_VALIDATION + +ifdef CONFIG_LTO_CLANG + +# Skip objtool for LLVM bitcode +$(obj)/%.o: objtool-enabled := + +else # 'OBJECT_FILES_NON_STANDARD := y': skip objtool checking for a directory # 'OBJECT_FILES_NON_STANDARD_foo.o := 'y': skip objtool checking for a file # 'OBJECT_FILES_NON_STANDARD_foo.o := 'n': override directory skip for a file -cmd_objtool = $(if $(patsubst y%,, \ - $(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n), \ - $(__objtool_obj) $(objtool_args) $@) -objtool_obj = $(if $(patsubst y%,, \ - $(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n), \ - $(__objtool_obj)) - -endif # CONFIG_LTO_CLANG -endif # CONFIG_STACK_VALIDATION -# Rebuild all objects when objtool changes, or is enabled/disabled. -objtool_dep = $(objtool_obj) \ - $(wildcard include/config/ORC_UNWINDER \ - include/config/STACK_VALIDATION) +$(obj)/%.o: objtool-enabled = $(if $(filter-out y%, \ + $(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n),y) + +endif ifdef CONFIG_TRIM_UNUSED_KSYMS cmd_gen_ksymdeps = \ @@ -259,7 +270,7 @@ define rule_cc_o_c $(call cmd,gen_ksymdeps) $(call cmd,checksrc) $(call cmd,checkdoc) - $(call cmd,objtool) + $(call cmd,gen_objtooldep) $(call cmd,modversions_c) $(call cmd,record_mcount) endef @@ -267,13 +278,12 @@ endef define rule_as_o_S $(call cmd_and_fixdep,as_o_S) $(call cmd,gen_ksymdeps) - $(call cmd,objtool) + $(call cmd,gen_objtooldep) $(call cmd,modversions_S) endef # Built-in and composite module parts -.SECONDEXPANSION: -$(obj)/%.o: $(src)/%.c $(recordmcount_source) $$(objtool_dep) FORCE +$(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE $(call if_changed_rule,cc_o_c) $(call cmd,force_checksrc) @@ -285,14 +295,13 @@ cmd_cc_lto_link_modules = \ $(LD) $(ld_flags) -r -o $@ \ $(shell [ -s $(@:.lto.o=.o.symversions) ] && \ echo -T $(@:.lto.o=.o.symversions)) \ - --whole-archive $(filter-out FORCE,$^) + --whole-archive $(filter-out FORCE,$^) \ + $(cmd_objtool) -ifdef CONFIG_STACK_VALIDATION # objtool was skipped for LLVM bitcode, run it now that we have compiled # modules into native code -cmd_cc_lto_link_modules += ; \ - $(objtree)/tools/objtool/objtool $(objtool_args) --module $@ -endif +$(obj)/%.lto.o: objtool-enabled = y +$(obj)/%.lto.o: part-of-module := y $(obj)/%.lto.o: $(obj)/%.o FORCE $(call if_changed,cc_lto_link_modules) @@ -356,7 +365,7 @@ $(obj)/%.s: $(src)/%.S FORCE $(call if_changed_dep,cpp_s_S) quiet_cmd_as_o_S = AS $(quiet_modtag) $@ - cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< + cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< $(cmd_objtool) ifdef CONFIG_ASM_MODVERSIONS @@ -375,7 +384,7 @@ cmd_modversions_S = \ fi endif -$(obj)/%.o: $(src)/%.S $$(objtool_dep) FORCE +$(obj)/%.o: $(src)/%.S FORCE $(call if_changed_rule,as_o_S) targets += $(filter-out $(subdir-builtin), $(real-obj-y)) |