19b9a3f20SMasahiro Yamada# SPDX-License-Identifier: GPL-2.0-only 29b9a3f20SMasahiro Yamada# =========================================================================== 39b9a3f20SMasahiro Yamada# Module final link 49b9a3f20SMasahiro Yamada# =========================================================================== 59b9a3f20SMasahiro Yamada 69b9a3f20SMasahiro YamadaPHONY := __modfinal 79b9a3f20SMasahiro Yamada__modfinal: 89b9a3f20SMasahiro Yamada 95f9ae91fSAndrii Nakryikoinclude include/config/auto.conf 109b9a3f20SMasahiro Yamadainclude $(srctree)/scripts/Kbuild.include 119b9a3f20SMasahiro Yamada 129b9a3f20SMasahiro Yamada# for c_flags 139b9a3f20SMasahiro Yamadainclude $(srctree)/scripts/Makefile.lib 149b9a3f20SMasahiro Yamada 159b9a3f20SMasahiro Yamada# find all modules listed in modules.order 169b9a3f20SMasahiro Yamadamodules := $(sort $(shell cat $(MODORDER))) 179b9a3f20SMasahiro Yamada 189b9a3f20SMasahiro Yamada__modfinal: $(modules) 199b9a3f20SMasahiro Yamada @: 209b9a3f20SMasahiro Yamada 21eb27ea5cSMasahiro Yamada# modname and part-of-module are set to make c_flags define proper module flags 229b9a3f20SMasahiro Yamadamodname = $(notdir $(@:.mod.o=)) 23eb27ea5cSMasahiro Yamadapart-of-module = y 249b9a3f20SMasahiro Yamada 259b9a3f20SMasahiro Yamadaquiet_cmd_cc_o_c = CC [M] $@ 26eb27ea5cSMasahiro Yamada cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 279b9a3f20SMasahiro Yamada 289b9a3f20SMasahiro Yamada%.mod.o: %.mod.c FORCE 299b9a3f20SMasahiro Yamada $(call if_changed_dep,cc_o_c) 309b9a3f20SMasahiro Yamada 319b9a3f20SMasahiro YamadaARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) 329b9a3f20SMasahiro Yamada 33*dc5723b0SSami Tolvanenifdef CONFIG_LTO_CLANG 34*dc5723b0SSami Tolvanen# With CONFIG_LTO_CLANG, reuse the object file we compiled for modpost to 35*dc5723b0SSami Tolvanen# avoid a second slow LTO link 36*dc5723b0SSami Tolvanenprelink-ext := .lto 37*dc5723b0SSami Tolvanenendif 38*dc5723b0SSami Tolvanen 399b9a3f20SMasahiro Yamadaquiet_cmd_ld_ko_o = LD [M] $@ 409b9a3f20SMasahiro Yamada cmd_ld_ko_o = \ 419b9a3f20SMasahiro Yamada $(LD) -r $(KBUILD_LDFLAGS) \ 429b9a3f20SMasahiro Yamada $(KBUILD_LDFLAGS_MODULE) $(LDFLAGS_MODULE) \ 43596b0474SMasahiro Yamada -T scripts/module.lds -o $@ $(filter %.o, $^); \ 449b9a3f20SMasahiro Yamada $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) 459b9a3f20SMasahiro Yamada 465f9ae91fSAndrii Nakryikoquiet_cmd_btf_ko = BTF [M] $@ 47e732b538SAndrii Nakryiko cmd_btf_ko = \ 48e732b538SAndrii Nakryiko if [ -f vmlinux ]; then \ 49e732b538SAndrii Nakryiko LLVM_OBJCOPY=$(OBJCOPY) $(PAHOLE) -J --btf_base vmlinux $@; \ 50e732b538SAndrii Nakryiko else \ 51e732b538SAndrii Nakryiko printf "Skipping BTF generation for %s due to unavailability of vmlinux\n" $@ 1>&2; \ 52e732b538SAndrii Nakryiko fi; 535f9ae91fSAndrii Nakryiko 545f9ae91fSAndrii Nakryiko# Same as newer-prereqs, but allows to exclude specified extra dependencies 555f9ae91fSAndrii Nakryikonewer_prereqs_except = $(filter-out $(PHONY) $(1),$?) 565f9ae91fSAndrii Nakryiko 575f9ae91fSAndrii Nakryiko# Same as if_changed, but allows to exclude specified extra dependencies 585f9ae91fSAndrii Nakryikoif_changed_except = $(if $(call newer_prereqs_except,$(2))$(cmd-check), \ 595f9ae91fSAndrii Nakryiko $(cmd); \ 605f9ae91fSAndrii Nakryiko printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd, @:) 615f9ae91fSAndrii Nakryiko 62*dc5723b0SSami Tolvanen 635f9ae91fSAndrii Nakryiko# Re-generate module BTFs if either module's .ko or vmlinux changed 64*dc5723b0SSami Tolvanen$(modules): %.ko: %$(prelink-ext).o %.mod.o scripts/module.lds $(if $(KBUILD_BUILTIN),vmlinux) FORCE 655f9ae91fSAndrii Nakryiko +$(call if_changed_except,ld_ko_o,vmlinux) 665f9ae91fSAndrii Nakryikoifdef CONFIG_DEBUG_INFO_BTF_MODULES 675f9ae91fSAndrii Nakryiko +$(if $(newer-prereqs),$(call cmd,btf_ko)) 685f9ae91fSAndrii Nakryikoendif 699b9a3f20SMasahiro Yamada 709b9a3f20SMasahiro Yamadatargets += $(modules) $(modules:.ko=.mod.o) 719b9a3f20SMasahiro Yamada 729b9a3f20SMasahiro Yamada# Add FORCE to the prequisites of a target to force it to be always rebuilt. 739b9a3f20SMasahiro Yamada# --------------------------------------------------------------------------- 749b9a3f20SMasahiro Yamada 759b9a3f20SMasahiro YamadaPHONY += FORCE 769b9a3f20SMasahiro YamadaFORCE: 779b9a3f20SMasahiro Yamada 789b9a3f20SMasahiro Yamada# Read all saved command lines and dependencies for the $(targets) we 799b9a3f20SMasahiro Yamada# may be building above, using $(if_changed{,_dep}). As an 809b9a3f20SMasahiro Yamada# optimization, we don't need to read them if the target does not 819b9a3f20SMasahiro Yamada# exist, we will rebuild anyway in that case. 829b9a3f20SMasahiro Yamada 839b9a3f20SMasahiro Yamadaexisting-targets := $(wildcard $(sort $(targets))) 849b9a3f20SMasahiro Yamada 859b9a3f20SMasahiro Yamada-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 869b9a3f20SMasahiro Yamada 879b9a3f20SMasahiro Yamada.PHONY: $(PHONY) 88