scripts/Makefile.modfinal

# SPDX-License-Identifier: GPL-2.0-only
# ===========================================================================
# Module final link
# ===========================================================================

PHONY := __modfinal
__modfinal:

include scripts/Kbuild.include

# for c_flags
include scripts/Makefile.lib

# find all modules listed in modules.order
modules := $(sort $(shell cat $(MODORDER)))
modules-klp := $(sort $(shell cat $(MODULES_LIVEPATCH)))
modules-no-klp := $(filter-out $(modules-klp), $(modules))

__modfinal: $(modules)
	@:

# modname is set to make c_flags define KBUILD_MODNAME
modname = $(notdir $(@:.mod.o=))

quiet_cmd_cc_o_c = CC [M]  $@
      cmd_cc_o_c = $(CC) $(c_flags) $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE) \
		   -c -o $@ $<

%.mod.o: %.mod.c FORCE
	$(call if_changed_dep,cc_o_c)

ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)

quiet_cmd_ld_ko_o = LD [M]  $@
      cmd_ld_ko_o =                                                     \
	$(LD) -r $(KBUILD_LDFLAGS)					\
		$(KBUILD_LDFLAGS_MODULE) $(LDFLAGS_MODULE)		\
		$(addprefix -T , $(KBUILD_LDS_MODULE))			\
		-o $@ $(filter %.o, $^);				\
	$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)

$(modules-no-klp): %.ko: %.o %.mod.o $(KBUILD_LDS_MODULE) FORCE
	+$(call if_changed,ld_ko_o)

targets += $(modules) $(modules:.ko=.mod.o)

# Live Patch
# ---------------------------------------------------------------------------

$(modules-klp:.ko=.tmp.ko): %.tmp.ko: %.o %.mod.o Symbols.list FORCE
	+$(call if_changed,ld_ko_o)

quiet_cmd_klp_convert = KLP     $@
      cmd_klp_convert = scripts/livepatch/klp-convert Symbols.list $< $@

$(modules-klp): %.ko: %.tmp.ko FORCE
	$(call if_changed,klp_convert)

targets += $(modules-klp:.ko=.tmp.ko)

ifeq ($(KBUILD_EXTMOD),)
# Read out modules.{order,livepatch} instead of expanding $(modules-no-klp).
# Otherwise, allmodconfig would fail with "Argument list too long".
filechk_klp_map = \
	echo "klp-convert-symbol-data.0.1";		\
	echo "*vmlinux";				\
	$(NM) -f posix vmlinux | cut -d\  -f1;		\
	sort $(MODORDER) $(MODULES_LIVEPATCH) |		\
	uniq -u |					\
	sed 's/\.ko$$//' |    			  	\
	while read o;					\
	do						\
		echo "*$$(basename $$o)";		\
		$(NM) -f posix $$o.o | cut -d\  -f1;	\
	done

Symbols.list: FORCE
	$(call filechk,klp_map)
endif

# Add FORCE to the prequisites of a target to force it to be always rebuilt.
# ---------------------------------------------------------------------------

PHONY += FORCE
FORCE:

# Read all saved command lines and dependencies for the $(targets) we
# may be building above, using $(if_changed{,_dep}). As an
# optimization, we don't need to read them if the target does not
# exist, we will rebuild anyway in that case.

existing-targets := $(wildcard $(sort $(targets)))

-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)

.PHONY: $(PHONY)