15d45950dSMasahiro Yamada# SPDX-License-Identifier: GPL-2.0-only 25d45950dSMasahiro Yamada 35d45950dSMasahiro YamadaPHONY := __default 45d45950dSMasahiro Yamada__default: vmlinux.o 55d45950dSMasahiro Yamada 65d45950dSMasahiro Yamadainclude include/config/auto.conf 75d45950dSMasahiro Yamadainclude $(srctree)/scripts/Kbuild.include 85d45950dSMasahiro Yamada 9b42d2306SMasahiro Yamada# for objtool 10b42d2306SMasahiro Yamadainclude $(srctree)/scripts/Makefile.lib 11b42d2306SMasahiro Yamada 125d45950dSMasahiro Yamada# Generate a linker script to ensure correct ordering of initcalls for Clang LTO 135d45950dSMasahiro Yamada# --------------------------------------------------------------------------- 145d45950dSMasahiro Yamada 155d45950dSMasahiro Yamadaquiet_cmd_gen_initcalls_lds = GEN $@ 165d45950dSMasahiro Yamada cmd_gen_initcalls_lds = \ 175d45950dSMasahiro Yamada $(PYTHON3) $(srctree)/scripts/jobserver-exec \ 185d45950dSMasahiro Yamada $(PERL) $(real-prereqs) > $@ 195d45950dSMasahiro Yamada 205d45950dSMasahiro Yamada.tmp_initcalls.lds: $(srctree)/scripts/generate_initcall_order.pl \ 215d45950dSMasahiro Yamada $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) FORCE 225d45950dSMasahiro Yamada $(call if_changed,gen_initcalls_lds) 235d45950dSMasahiro Yamada 245d45950dSMasahiro Yamadatargets := .tmp_initcalls.lds 255d45950dSMasahiro Yamada 265d45950dSMasahiro Yamadaifdef CONFIG_LTO_CLANG 275d45950dSMasahiro Yamadainitcalls-lds := .tmp_initcalls.lds 285d45950dSMasahiro Yamadaendif 295d45950dSMasahiro Yamada 30b42d2306SMasahiro Yamada# objtool for vmlinux.o 31b42d2306SMasahiro Yamada# --------------------------------------------------------------------------- 32b42d2306SMasahiro Yamada# 33b42d2306SMasahiro Yamada# For LTO and IBT, objtool doesn't run on individual translation units. 34b42d2306SMasahiro Yamada# Run everything on vmlinux instead. 35b42d2306SMasahiro Yamada 36b42d2306SMasahiro Yamadaobjtool-enabled := $(or $(delay-objtool),$(CONFIG_NOINSTR_VALIDATION)) 37b42d2306SMasahiro Yamada 38*9ec6ab6eSMasahiro Yamadavmlinux-objtool-args-$(delay-objtool) += $(objtool-args-y) 39*9ec6ab6eSMasahiro Yamadavmlinux-objtool-args-$(CONFIG_GCOV_KERNEL) += --no-unreachable 40*9ec6ab6eSMasahiro Yamadavmlinux-objtool-args-$(CONFIG_NOINSTR_VALIDATION) += --noinstr $(if $(CONFIG_CPU_UNRET_ENTRY), --unret) 41b42d2306SMasahiro Yamada 42*9ec6ab6eSMasahiro Yamadaobjtool-args = $(vmlinux-objtool-args-y) --link 43b42d2306SMasahiro Yamada 445d45950dSMasahiro Yamada# Link of vmlinux.o used for section mismatch analysis 455d45950dSMasahiro Yamada# --------------------------------------------------------------------------- 465d45950dSMasahiro Yamada 475d45950dSMasahiro Yamadaquiet_cmd_ld_vmlinux.o = LD $@ 485d45950dSMasahiro Yamada cmd_ld_vmlinux.o = \ 495d45950dSMasahiro Yamada $(LD) ${KBUILD_LDFLAGS} -r -o $@ \ 505d45950dSMasahiro Yamada $(addprefix -T , $(initcalls-lds)) \ 515d45950dSMasahiro Yamada --whole-archive $(KBUILD_VMLINUX_OBJS) --no-whole-archive \ 525d45950dSMasahiro Yamada --start-group $(KBUILD_VMLINUX_LIBS) --end-group \ 53b42d2306SMasahiro Yamada $(cmd_objtool) 545d45950dSMasahiro Yamada 555d45950dSMasahiro Yamadadefine rule_ld_vmlinux.o 565d45950dSMasahiro Yamada $(call cmd_and_savecmd,ld_vmlinux.o) 57b42d2306SMasahiro Yamada $(call cmd,gen_objtooldep) 585d45950dSMasahiro Yamadaendef 595d45950dSMasahiro Yamada 605d45950dSMasahiro Yamadavmlinux.o: $(initcalls-lds) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) FORCE 615d45950dSMasahiro Yamada $(call if_changed_rule,ld_vmlinux.o) 625d45950dSMasahiro Yamada 635d45950dSMasahiro Yamadatargets += vmlinux.o 645d45950dSMasahiro Yamada 655d45950dSMasahiro Yamada# Add FORCE to the prequisites of a target to force it to be always rebuilt. 665d45950dSMasahiro Yamada# --------------------------------------------------------------------------- 675d45950dSMasahiro Yamada 685d45950dSMasahiro YamadaPHONY += FORCE 695d45950dSMasahiro YamadaFORCE: 705d45950dSMasahiro Yamada 715d45950dSMasahiro Yamada# Read all saved command lines and dependencies for the $(targets) we 725d45950dSMasahiro Yamada# may be building above, using $(if_changed{,_dep}). As an 735d45950dSMasahiro Yamada# optimization, we don't need to read them if the target does not 745d45950dSMasahiro Yamada# exist, we will rebuild anyway in that case. 755d45950dSMasahiro Yamada 765d45950dSMasahiro Yamadaexisting-targets := $(wildcard $(sort $(targets))) 775d45950dSMasahiro Yamada 785d45950dSMasahiro Yamada-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 795d45950dSMasahiro Yamada 805d45950dSMasahiro Yamada.PHONY: $(PHONY) 81