1# SPDX-License-Identifier: GPL-2.0-only 2# =========================================================================== 3# Module final link 4# =========================================================================== 5 6PHONY := __modfinal 7__modfinal: 8 9include $(objtree)/include/config/auto.conf 10include $(srctree)/scripts/Kbuild.include 11 12# for c_flags 13include $(srctree)/scripts/Makefile.lib 14 15mixed-build-prefix = $(if $(KBUILD_MIXED_TREE),$(KBUILD_MIXED_TREE)/) 16 17# find all modules listed in modules.order 18modules := $(call read-file, $(MODORDER)) 19 20__modfinal: $(modules:%.o=%.ko) 21 @: 22 23# modname and part-of-module are set to make c_flags define proper module flags 24modname = $(notdir $(@:.mod.o=)) 25part-of-module = y 26GCOV_PROFILE := n 27KCSAN_SANITIZE := n 28 29quiet_cmd_cc_o_c = CC [M] $@ 30 cmd_cc_o_c = $(CC) $(filter-out $(CC_FLAGS_CFI), $(c_flags)) -c -o $@ $< 31 32%.mod.o: %.mod.c FORCE 33 $(call if_changed_dep,cc_o_c) 34 35$(extmod_prefix).module-common.o: $(srctree)/scripts/module-common.c FORCE 36 $(call if_changed_dep,cc_o_c) 37 38ifdef CONFIG_CRYPTO_FIPS140_MOD 39ARCH_POSTLINK := $(srctree)/arch/$(SRCARCH)/Makefile.postlink 40endif 41 42quiet_cmd_ld_ko_o = LD [M] $@ 43 cmd_ld_ko_o = \ 44 $(LD) -r $(KBUILD_LDFLAGS) \ 45 $(KBUILD_LDFLAGS_MODULE) $(LDFLAGS_MODULE) \ 46 -T $(objtree)/scripts/module.lds -o $@ $(filter %.o, $^); \ 47 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) 48 49quiet_cmd_btf_ko = BTF [M] $@ 50 cmd_btf_ko = \ 51 if [ ! -f $(mixed-build-prefix)vmlinux ]; then \ 52 printf "Skipping BTF generation for %s due to unavailability of $(mixed-build-prefix)vmlinux\n" $@ 1>&2; \ 53 else \ 54 LLVM_OBJCOPY="$(OBJCOPY)" $(PAHOLE) -J $(PAHOLE_FLAGS) $(MODULE_PAHOLE_FLAGS) --btf_base $(mixed-build-prefix)vmlinux $@; \ 55 $(RESOLVE_BTFIDS) -b $(mixed-build-prefix)vmlinux $@; \ 56 fi; 57 58# Same as newer-prereqs, but allows to exclude specified extra dependencies 59newer_prereqs_except = $(filter-out $(PHONY) $(1),$?) 60 61# Same as if_changed, but allows to exclude specified extra dependencies 62if_changed_except = $(if $(call newer_prereqs_except,$(2))$(cmd-check), \ 63 $(cmd); \ 64 printf '%s\n' 'savedcmd_$@ := $(make-cmd)' > $(dot-target).cmd, @:) 65 66# Re-generate module BTFs if either module's .ko or vmlinux changed 67%.ko: %.o %.mod.o $(extmod_prefix).module-common.o $(objtree)/scripts/module.lds $(and $(CONFIG_DEBUG_INFO_BTF_MODULES),$(KBUILD_BUILTIN),$(mixed-build-prefix)vmlinux) FORCE 68 +$(call if_changed_except,ld_ko_o,$(mixed-build-prefix)vmlinux) 69ifdef CONFIG_DEBUG_INFO_BTF_MODULES 70 +$(if $(newer-prereqs),$(call cmd,btf_ko)) 71endif 72 73targets += $(modules:%.o=%.ko) $(modules:%.o=%.mod.o) $(extmod_prefix).module-common.o 74 75# Add FORCE to the prerequisites of a target to force it to be always rebuilt. 76# --------------------------------------------------------------------------- 77 78PHONY += FORCE 79FORCE: 80 81# Read all saved command lines and dependencies for the $(targets) we 82# may be building above, using $(if_changed{,_dep}). As an 83# optimization, we don't need to read them if the target does not 84# exist, we will rebuild anyway in that case. 85 86existing-targets := $(wildcard $(sort $(targets))) 87 88-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 89 90.PHONY: $(PHONY) 91