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 12c25e1c55SMasahiro Yamada# for c_flags 139b9a3f20SMasahiro Yamadainclude $(srctree)/scripts/Makefile.lib 149b9a3f20SMasahiro Yamada 159b9a3f20SMasahiro Yamada# find all modules listed in modules.order 166768fa4bSMasahiro Yamadamodules := $(call read-file, $(MODORDER)) 179b9a3f20SMasahiro Yamada 18f65a4868SMasahiro Yamada__modfinal: $(modules:%.o=%.ko) 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] $@ 2625a21fbbSSami Tolvanen cmd_cc_o_c = $(CC) $(filter-out $(CC_FLAGS_CFI) $(CFLAGS_GCOV), $(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 Yamadaquiet_cmd_ld_ko_o = LD [M] $@ 32b1a1a1a0SSami Tolvanen cmd_ld_ko_o += \ 339b9a3f20SMasahiro Yamada $(LD) -r $(KBUILD_LDFLAGS) \ 349b9a3f20SMasahiro Yamada $(KBUILD_LDFLAGS_MODULE) $(LDFLAGS_MODULE) \ 35*7f6d8f7eSMasahiro Yamada -T scripts/module.lds -o $@ $(filter %.o, $^) 369b9a3f20SMasahiro Yamada 375f9ae91fSAndrii Nakryikoquiet_cmd_btf_ko = BTF [M] $@ 38e732b538SAndrii Nakryiko cmd_btf_ko = \ 392f7ab126SMiguel Ojeda if [ ! -f vmlinux ]; then \ 402f7ab126SMiguel Ojeda printf "Skipping BTF generation for %s due to unavailability of vmlinux\n" $@ 1>&2; \ 412f7ab126SMiguel Ojeda else \ 429741e07eSJiri Olsa LLVM_OBJCOPY="$(OBJCOPY)" $(PAHOLE) -J $(PAHOLE_FLAGS) --btf_base vmlinux $@; \ 430e32dfc8SKumar Kartikeya Dwivedi $(RESOLVE_BTFIDS) -b vmlinux $@; \ 44e732b538SAndrii Nakryiko fi; 455f9ae91fSAndrii Nakryiko 465f9ae91fSAndrii Nakryiko# Same as newer-prereqs, but allows to exclude specified extra dependencies 475f9ae91fSAndrii Nakryikonewer_prereqs_except = $(filter-out $(PHONY) $(1),$?) 485f9ae91fSAndrii Nakryiko 495f9ae91fSAndrii Nakryiko# Same as if_changed, but allows to exclude specified extra dependencies 505f9ae91fSAndrii Nakryikoif_changed_except = $(if $(call newer_prereqs_except,$(2))$(cmd-check), \ 515f9ae91fSAndrii Nakryiko $(cmd); \ 5292215e7aSMasahiro Yamada printf '%s\n' 'savedcmd_$@ := $(make-cmd)' > $(dot-target).cmd, @:) 535f9ae91fSAndrii Nakryiko 545f9ae91fSAndrii Nakryiko# Re-generate module BTFs if either module's .ko or vmlinux changed 55f65a4868SMasahiro Yamada%.ko: %.o %.mod.o scripts/module.lds $(and $(CONFIG_DEBUG_INFO_BTF_MODULES),$(KBUILD_BUILTIN),vmlinux) FORCE 565f9ae91fSAndrii Nakryiko +$(call if_changed_except,ld_ko_o,vmlinux) 575f9ae91fSAndrii Nakryikoifdef CONFIG_DEBUG_INFO_BTF_MODULES 585f9ae91fSAndrii Nakryiko +$(if $(newer-prereqs),$(call cmd,btf_ko)) 595f9ae91fSAndrii Nakryikoendif 609b9a3f20SMasahiro Yamada 61f65a4868SMasahiro Yamadatargets += $(modules:%.o=%.ko) $(modules:%.o=%.mod.o) 629b9a3f20SMasahiro Yamada 639b9a3f20SMasahiro Yamada# Add FORCE to the prequisites of a target to force it to be always rebuilt. 649b9a3f20SMasahiro Yamada# --------------------------------------------------------------------------- 659b9a3f20SMasahiro Yamada 669b9a3f20SMasahiro YamadaPHONY += FORCE 679b9a3f20SMasahiro YamadaFORCE: 689b9a3f20SMasahiro Yamada 699b9a3f20SMasahiro Yamada# Read all saved command lines and dependencies for the $(targets) we 709b9a3f20SMasahiro Yamada# may be building above, using $(if_changed{,_dep}). As an 719b9a3f20SMasahiro Yamada# optimization, we don't need to read them if the target does not 729b9a3f20SMasahiro Yamada# exist, we will rebuild anyway in that case. 739b9a3f20SMasahiro Yamada 749b9a3f20SMasahiro Yamadaexisting-targets := $(wildcard $(sort $(targets))) 759b9a3f20SMasahiro Yamada 769b9a3f20SMasahiro Yamada-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 779b9a3f20SMasahiro Yamada 789b9a3f20SMasahiro Yamada.PHONY: $(PHONY) 79