# SPDX-License-Identifier: GPL-2.0-only PHONY := __default__default: vmlinux.o modules.builtin.modinfo modules.builtin include include/config/auto.confinclude $(srctree)/scripts/Kbuild.include # for objtoolinclude $(srctree)/scripts/Makefile.lib # Generate a linker script to ensure correct ordering of initcalls for Clang LTO# --------------------------------------------------------------------------- quiet_cmd_gen_initcalls_lds = GEN     $@      cmd_gen_initcalls_lds = \	$(PYTHON3) $(srctree)/scripts/jobserver-exec \	$(PERL) $(real-prereqs) > $@ .tmp_initcalls.lds: $(srctree)/scripts/generate_initcall_order.pl \		vmlinux.a $(KBUILD_VMLINUX_LIBS) FORCE	$(call if_changed,gen_initcalls_lds) targets := .tmp_initcalls.lds ifdef CONFIG_LTO_CLANGinitcalls-lds := .tmp_initcalls.ldsendif # objtool for vmlinux.o# ---------------------------------------------------------------------------## For LTO and IBT, objtool doesn't run on individual translation units.# Run everything on vmlinux instead. objtool-enabled := $(or $(delay-objtool),$(CONFIG_NOINSTR_VALIDATION)) vmlinux-objtool-args-$(delay-objtool)			+= $(objtool-args-y)vmlinux-objtool-args-$(CONFIG_GCOV_KERNEL)		+= --no-unreachablevmlinux-objtool-args-$(CONFIG_NOINSTR_VALIDATION)	+= --noinstr \							   $(if $(or $(CONFIG_MITIGATION_UNRET_ENTRY),$(CONFIG_MITIGATION_SRSO)), --unret) objtool-args = $(vmlinux-objtool-args-y) --link # Link of vmlinux.o used for section mismatch analysis# --------------------------------------------------------------------------- vmlinux-o-ld-args-$(CONFIG_BUILTIN_MODULE_RANGES)	+= -Map=$@.map quiet_cmd_ld_vmlinux.o = LD      $@      cmd_ld_vmlinux.o = \	$(LD) ${KBUILD_LDFLAGS} -r -o $@ \	$(vmlinux-o-ld-args-y) \	$(addprefix -T , $(initcalls-lds)) \	--whole-archive vmlinux.a --no-whole-archive \	--start-group $(KBUILD_VMLINUX_LIBS) --end-group \	$(cmd_objtool) define rule_ld_vmlinux.o	$(call cmd_and_savecmd,ld_vmlinux.o)	$(call cmd,gen_objtooldep)endef vmlinux.o: $(initcalls-lds) vmlinux.a $(KBUILD_VMLINUX_LIBS) FORCE	$(call if_changed_rule,ld_vmlinux.o) targets += vmlinux.o # module.builtin.modinfo# --------------------------------------------------------------------------- OBJCOPYFLAGS_modules.builtin.modinfo := -j .modinfo -O binary targets += modules.builtin.modinfomodules.builtin.modinfo: vmlinux.o FORCE	$(call if_changed,objcopy) # module.builtin# --------------------------------------------------------------------------- # The second line aids cases where multiple modules share the same object. quiet_cmd_modules_builtin = GEN     $@      cmd_modules_builtin = \	tr '\0' '\n' < $< | \	sed -n 's/^[[:alnum:]:_]*\.file=//p' | \	tr ' ' '\n' | uniq | sed -e 's:^:kernel/:' -e 's/$$/.ko/' > $@ targets += modules.builtinmodules.builtin: modules.builtin.modinfo FORCE	$(call if_changed,modules_builtin) # Add FORCE to the prerequisites of a target to force it to be always rebuilt.# --------------------------------------------------------------------------- PHONY += FORCEFORCE: # 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)