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- # SPDX-License-Identifier: GPL-2.0-only
- # ===========================================================================
- # Module final link
- # ===========================================================================
- PHONY := __modfinal
- __modfinal:
- include $(objtree)/include/config/auto.conf
- include $(srctree)/scripts/Kbuild.include
- # for c_flags and objtool_args
- include $(srctree)/scripts/Makefile.lib
- # find all modules listed in modules.order
- modules := $(sort $(shell cat $(MODORDER)))
- __modfinal: $(modules)
- @:
- # modname and part-of-module are set to make c_flags define proper module flags
- modname = $(notdir $(@:.mod.o=))
- part-of-module = y
- quiet_cmd_cc_o_c = CC [M] $@
- cmd_cc_o_c = \
- $(CC) $(filter-out $(CC_FLAGS_CFI) $(CC_FLAGS_FTRACE), \
- $(c_flags)) -c -o $@ $<
- %.mod.o: %.mod.c FORCE
- $(call if_changed_dep,cc_o_c)
- ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
- ifdef CONFIG_LTO_CLANG
- # With CONFIG_LTO_CLANG, reuse the object file we compiled for modpost to
- # avoid a second slow LTO link
- prelink-ext := .lto
- # ELF processing was skipped earlier because we didn't have native code,
- # so let's now process the prelinked binary before we link the module.
- ifdef CONFIG_STACK_VALIDATION
- ifneq ($(SKIP_STACK_VALIDATION),1)
- cmd_ld_ko_o += \
- $(objtree)/tools/objtool/objtool $(objtool_args) \
- $(@:.ko=$(prelink-ext).o);
- endif # SKIP_STACK_VALIDATION
- endif # CONFIG_STACK_VALIDATION
- endif # CONFIG_LTO_CLANG
- quiet_cmd_ld_ko_o = LD [M] $@
- cmd_ld_ko_o += \
- $(LD) -r $(KBUILD_LDFLAGS) \
- $(KBUILD_LDFLAGS_MODULE) $(LDFLAGS_MODULE) \
- -T scripts/module.lds -o $@ $(filter %.o, $^); \
- $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
- ifdef CONFIG_CFI_CLANG
- # LLVM can drops jump table symbols from the final binary. Add them
- # back to make stack traces and other symbol output readable.
- cmd_ld_ko_o += ; \
- $(srctree)/scripts/generate_cfi_kallsyms.pl --module \
- $@ > $(@:.ko=.lds); \
- if [ -s $(@:.ko=.lds) ]; then \
- $(LD) -r $(KBUILD_LDFLAGS) \
- $(KBUILD_LDFLAGS_MODULE) $(LDFLAGS_MODULE) \
- -T $(@:.ko=.lds) \
- -o $(@:.ko=.tmp.ko) $@; \
- mv -f $(@:.ko=.tmp.ko) $@; \
- else \
- rm -f $(@:.ko=.lds); \
- fi
- endif
- $(modules): %.ko: %$(prelink-ext).o %.mod.o scripts/module.lds FORCE
- +$(call if_changed,ld_ko_o)
- targets += $(modules) $(modules:.ko=.mod.o)
- # Add FORCE to the prequisites of a target to force it to be always rebuilt.
- # ---------------------------------------------------------------------------
- PHONY += FORCE
- FORCE:
- # Read all saved command lines and dependencies for the $(targets) we
- # may be building above, using $(if_changed{,_dep}). As an
- # optimization, we don't need to read them if the target does not
- # exist, we will rebuild anyway in that case.
- existing-targets := $(wildcard $(sort $(targets)))
- -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
- .PHONY: $(PHONY)
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