1 # SPDX-License-Identifier: GPL-2.0-only 1 # SPDX-License-Identifier: GPL-2.0-only 2 2 3 PHONY := __default 3 PHONY := __default 4 __default: vmlinux.o modules.builtin.modinfo m 4 __default: vmlinux.o modules.builtin.modinfo modules.builtin 5 5 6 include include/config/auto.conf 6 include include/config/auto.conf 7 include $(srctree)/scripts/Kbuild.include 7 include $(srctree)/scripts/Kbuild.include 8 8 9 # for objtool 9 # for objtool 10 include $(srctree)/scripts/Makefile.lib 10 include $(srctree)/scripts/Makefile.lib 11 11 12 # Generate a linker script to ensure correct o 12 # Generate a linker script to ensure correct ordering of initcalls for Clang LTO 13 # -------------------------------------------- 13 # --------------------------------------------------------------------------- 14 14 15 quiet_cmd_gen_initcalls_lds = GEN $@ 15 quiet_cmd_gen_initcalls_lds = GEN $@ 16 cmd_gen_initcalls_lds = \ 16 cmd_gen_initcalls_lds = \ 17 $(PYTHON3) $(srctree)/scripts/jobserve 17 $(PYTHON3) $(srctree)/scripts/jobserver-exec \ 18 $(PERL) $(real-prereqs) > $@ 18 $(PERL) $(real-prereqs) > $@ 19 19 20 .tmp_initcalls.lds: $(srctree)/scripts/generat 20 .tmp_initcalls.lds: $(srctree)/scripts/generate_initcall_order.pl \ 21 vmlinux.a $(KBUILD_VMLINUX_LIB 21 vmlinux.a $(KBUILD_VMLINUX_LIBS) FORCE 22 $(call if_changed,gen_initcalls_lds) 22 $(call if_changed,gen_initcalls_lds) 23 23 24 targets := .tmp_initcalls.lds 24 targets := .tmp_initcalls.lds 25 25 26 ifdef CONFIG_LTO_CLANG 26 ifdef CONFIG_LTO_CLANG 27 initcalls-lds := .tmp_initcalls.lds 27 initcalls-lds := .tmp_initcalls.lds 28 endif 28 endif 29 29 30 # objtool for vmlinux.o 30 # objtool for vmlinux.o 31 # -------------------------------------------- 31 # --------------------------------------------------------------------------- 32 # 32 # 33 # For LTO and IBT, objtool doesn't run on indi 33 # For LTO and IBT, objtool doesn't run on individual translation units. 34 # Run everything on vmlinux instead. 34 # Run everything on vmlinux instead. 35 35 36 objtool-enabled := $(or $(delay-objtool),$(CON 36 objtool-enabled := $(or $(delay-objtool),$(CONFIG_NOINSTR_VALIDATION)) 37 37 38 vmlinux-objtool-args-$(delay-objtool) 38 vmlinux-objtool-args-$(delay-objtool) += $(objtool-args-y) 39 vmlinux-objtool-args-$(CONFIG_GCOV_KERNEL) 39 vmlinux-objtool-args-$(CONFIG_GCOV_KERNEL) += --no-unreachable 40 vmlinux-objtool-args-$(CONFIG_NOINSTR_VALIDATI 40 vmlinux-objtool-args-$(CONFIG_NOINSTR_VALIDATION) += --noinstr \ 41 41 $(if $(or $(CONFIG_MITIGATION_UNRET_ENTRY),$(CONFIG_MITIGATION_SRSO)), --unret) 42 42 43 objtool-args = $(vmlinux-objtool-args-y) --lin 43 objtool-args = $(vmlinux-objtool-args-y) --link 44 44 45 # Link of vmlinux.o used for section mismatch 45 # Link of vmlinux.o used for section mismatch analysis 46 # -------------------------------------------- 46 # --------------------------------------------------------------------------- 47 47 48 vmlinux-o-ld-args-$(CONFIG_BUILTIN_MODULE_RANG 48 vmlinux-o-ld-args-$(CONFIG_BUILTIN_MODULE_RANGES) += -Map=$@.map 49 49 50 quiet_cmd_ld_vmlinux.o = LD $@ 50 quiet_cmd_ld_vmlinux.o = LD $@ 51 cmd_ld_vmlinux.o = \ 51 cmd_ld_vmlinux.o = \ 52 $(LD) ${KBUILD_LDFLAGS} -r -o $@ \ 52 $(LD) ${KBUILD_LDFLAGS} -r -o $@ \ 53 $(vmlinux-o-ld-args-y) \ 53 $(vmlinux-o-ld-args-y) \ 54 $(addprefix -T , $(initcalls-lds)) \ 54 $(addprefix -T , $(initcalls-lds)) \ 55 --whole-archive vmlinux.a --no-whole-a 55 --whole-archive vmlinux.a --no-whole-archive \ 56 --start-group $(KBUILD_VMLINUX_LIBS) - 56 --start-group $(KBUILD_VMLINUX_LIBS) --end-group \ 57 $(cmd_objtool) 57 $(cmd_objtool) 58 58 59 define rule_ld_vmlinux.o 59 define rule_ld_vmlinux.o 60 $(call cmd_and_savecmd,ld_vmlinux.o) 60 $(call cmd_and_savecmd,ld_vmlinux.o) 61 $(call cmd,gen_objtooldep) 61 $(call cmd,gen_objtooldep) 62 endef 62 endef 63 63 64 vmlinux.o: $(initcalls-lds) vmlinux.a $(KBUILD 64 vmlinux.o: $(initcalls-lds) vmlinux.a $(KBUILD_VMLINUX_LIBS) FORCE 65 $(call if_changed_rule,ld_vmlinux.o) 65 $(call if_changed_rule,ld_vmlinux.o) 66 66 67 targets += vmlinux.o 67 targets += vmlinux.o 68 68 69 # module.builtin.modinfo 69 # module.builtin.modinfo 70 # -------------------------------------------- 70 # --------------------------------------------------------------------------- 71 71 72 OBJCOPYFLAGS_modules.builtin.modinfo := -j .mo 72 OBJCOPYFLAGS_modules.builtin.modinfo := -j .modinfo -O binary 73 73 74 targets += modules.builtin.modinfo 74 targets += modules.builtin.modinfo 75 modules.builtin.modinfo: vmlinux.o FORCE 75 modules.builtin.modinfo: vmlinux.o FORCE 76 $(call if_changed,objcopy) 76 $(call if_changed,objcopy) 77 77 78 # module.builtin 78 # module.builtin 79 # -------------------------------------------- 79 # --------------------------------------------------------------------------- 80 80 81 # The second line aids cases where multiple mo 81 # The second line aids cases where multiple modules share the same object. 82 82 83 quiet_cmd_modules_builtin = GEN $@ 83 quiet_cmd_modules_builtin = GEN $@ 84 cmd_modules_builtin = \ 84 cmd_modules_builtin = \ 85 tr '\0' '\n' < $< | \ 85 tr '\0' '\n' < $< | \ 86 sed -n 's/^[[:alnum:]:_]*\.file=//p' | 86 sed -n 's/^[[:alnum:]:_]*\.file=//p' | \ 87 tr ' ' '\n' | uniq | sed -e 's:^:kerne 87 tr ' ' '\n' | uniq | sed -e 's:^:kernel/:' -e 's/$$/.ko/' > $@ 88 88 89 targets += modules.builtin 89 targets += modules.builtin 90 modules.builtin: modules.builtin.modinfo FORCE 90 modules.builtin: modules.builtin.modinfo FORCE 91 $(call if_changed,modules_builtin) 91 $(call if_changed,modules_builtin) 92 92 93 # Add FORCE to the prerequisites of a target t 93 # Add FORCE to the prerequisites of a target to force it to be always rebuilt. 94 # -------------------------------------------- 94 # --------------------------------------------------------------------------- 95 95 96 PHONY += FORCE 96 PHONY += FORCE 97 FORCE: 97 FORCE: 98 98 99 # Read all saved command lines and dependencie 99 # Read all saved command lines and dependencies for the $(targets) we 100 # may be building above, using $(if_changed{,_ 100 # may be building above, using $(if_changed{,_dep}). As an 101 # optimization, we don't need to read them if 101 # optimization, we don't need to read them if the target does not 102 # exist, we will rebuild anyway in that case. 102 # exist, we will rebuild anyway in that case. 103 103 104 existing-targets := $(wildcard $(sort $(target 104 existing-targets := $(wildcard $(sort $(targets))) 105 105 106 -include $(foreach f,$(existing-targets),$(dir 106 -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 107 107 108 .PHONY: $(PHONY) 108 .PHONY: $(PHONY)
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