# SPDX-License-Identifier: GPL-2.0-only PHONY := __default__default: vmlinux.o 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 delay-objtool (IBT or LTO), objtool doesn't run on individual translation# units.  Instead it runs on vmlinux.o.## For !delay-objtool + CONFIG_NOINSTR_VALIDATION, it runs on both translation# units and vmlinux.o, with the latter only used for noinstr/unret validation. objtool-enabled := $(or $(delay-objtool),$(CONFIG_NOINSTR_VALIDATION)) ifeq ($(delay-objtool),y)vmlinux-objtool-args-y					+= $(objtool-args-y)elsevmlinux-objtool-args-$(CONFIG_OBJTOOL_WERROR)		+= --Werrorendif vmlinux-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 # 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)