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 11include $(srctree)/scripts/Makefile.lib 12 13# find all modules listed in modules.order 14modules := $(call read-file, modules.order) 15 16__modfinal: $(modules:%.o=%.ko) 17 @: 18 19# modname and part-of-module are set to make c_flags define proper module flags 20modname = $(notdir $(@:.mod.o=)) 21part-of-module = y 22GCOV_PROFILE := n 23ccflags-remove-y := $(CC_FLAGS_CFI) 24 25%.mod.o: %.mod.c FORCE 26 $(call if_changed_rule,cc_o_c) 27 28.module-common.o: $(srctree)/scripts/module-common.c FORCE 29 $(call if_changed_rule,cc_o_c) 30 31ifneq ($(WARN_ON_UNUSED_TRACEPOINTS),) 32cmd_check_tracepoint = $(objtree)/scripts/tracepoint-update --module $<; 33endif 34 35quiet_cmd_ld_ko_o = LD [M] $@ 36 cmd_ld_ko_o = \ 37 $(LD) -r $(KBUILD_LDFLAGS) \ 38 $(KBUILD_LDFLAGS_MODULE) $(LDFLAGS_MODULE) \ 39 -T $(objtree)/scripts/module.lds -o $@ $(filter %.o, $^) 40 41quiet_cmd_btf_ko = BTF [M] $@ 42 cmd_btf_ko = \ 43 if [ ! -f $(objtree)/vmlinux ]; then \ 44 printf "Skipping BTF generation for %s due to unavailability of vmlinux\n" $@ 1>&2; \ 45 else \ 46 $(CONFIG_SHELL) $(srctree)/scripts/gen-btf.sh --btf_base $(objtree)/vmlinux $@; \ 47 fi; 48 49# Re-generate module BTFs if either module's .ko or vmlinux changed 50%.ko: %.o %.mod.o .module-common.o $(objtree)/scripts/module.lds $(and $(CONFIG_DEBUG_INFO_BTF_MODULES),$(KBUILD_BUILTIN),$(objtree)/vmlinux) FORCE 51 +$(call if_changed,ld_ko_o) 52ifdef CONFIG_DEBUG_INFO_BTF_MODULES 53 +$(if $(newer-prereqs),$(call cmd,btf_ko)) 54endif 55 +$(call cmd,check_tracepoint) 56 57targets += $(modules:%.o=%.ko) $(modules:%.o=%.mod.o) .module-common.o 58 59# Add FORCE to the prerequisites of a target to force it to be always rebuilt. 60# --------------------------------------------------------------------------- 61 62PHONY += FORCE 63FORCE: 64 65# Read all saved command lines and dependencies for the $(targets) we 66# may be building above, using $(if_changed{,_dep}). As an 67# optimization, we don't need to read them if the target does not 68# exist, we will rebuild anyway in that case. 69 70existing-targets := $(wildcard $(sort $(targets))) 71 72-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 73 74.PHONY: $(PHONY) 75