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81 lines
2.7 KiB
81 lines
2.7 KiB
# SPDX-License-Identifier: GPL-2.0-only |
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# =========================================================================== |
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# Module final link |
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# =========================================================================== |
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PHONY := __modfinal |
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__modfinal: |
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include include/config/auto.conf |
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include $(srctree)/scripts/Kbuild.include |
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# for c_flags and mod-prelink-ext |
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include $(srctree)/scripts/Makefile.lib |
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# find all modules listed in modules.order |
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modules := $(sort $(shell cat $(MODORDER))) |
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__modfinal: $(modules) |
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@: |
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# modname and part-of-module are set to make c_flags define proper module flags |
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modname = $(notdir $(@:.mod.o=)) |
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part-of-module = y |
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quiet_cmd_cc_o_c = CC [M] $@ |
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cmd_cc_o_c = $(CC) $(filter-out $(CC_FLAGS_CFI), $(c_flags)) -c -o $@ $< |
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%.mod.o: %.mod.c FORCE |
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$(call if_changed_dep,cc_o_c) |
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ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) |
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quiet_cmd_ld_ko_o = LD [M] $@ |
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cmd_ld_ko_o += \ |
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$(LD) -r $(KBUILD_LDFLAGS) \ |
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$(KBUILD_LDFLAGS_MODULE) $(LDFLAGS_MODULE) \ |
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-T scripts/module.lds -o $@ $(filter %.o, $^); \ |
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$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) |
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quiet_cmd_btf_ko = BTF [M] $@ |
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cmd_btf_ko = \ |
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if [ -f vmlinux ]; then \ |
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LLVM_OBJCOPY="$(OBJCOPY)" $(PAHOLE) -J --btf_base vmlinux $@; \ |
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else \ |
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printf "Skipping BTF generation for %s due to unavailability of vmlinux\n" $@ 1>&2; \ |
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fi; |
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# Same as newer-prereqs, but allows to exclude specified extra dependencies |
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newer_prereqs_except = $(filter-out $(PHONY) $(1),$?) |
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# Same as if_changed, but allows to exclude specified extra dependencies |
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if_changed_except = $(if $(call newer_prereqs_except,$(2))$(cmd-check), \ |
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$(cmd); \ |
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printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd, @:) |
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# Re-generate module BTFs if either module's .ko or vmlinux changed |
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$(modules): %.ko: %$(mod-prelink-ext).o %.mod.o scripts/module.lds $(if $(KBUILD_BUILTIN),vmlinux) FORCE |
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+$(call if_changed_except,ld_ko_o,vmlinux) |
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ifdef CONFIG_DEBUG_INFO_BTF_MODULES |
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+$(if $(newer-prereqs),$(call cmd,btf_ko)) |
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endif |
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targets += $(modules) $(modules:.ko=.mod.o) |
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# Add FORCE to the prequisites of a target to force it to be always rebuilt. |
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# --------------------------------------------------------------------------- |
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PHONY += FORCE |
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FORCE: |
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# Read all saved command lines and dependencies for the $(targets) we |
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# may be building above, using $(if_changed{,_dep}). As an |
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# optimization, we don't need to read them if the target does not |
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# exist, we will rebuild anyway in that case. |
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existing-targets := $(wildcard $(sort $(targets))) |
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-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) |
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.PHONY: $(PHONY)
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