Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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" $@ 1>&2; \
45 else \
46 LLVM_OBJCOPY="$(OBJCOPY)" $(PAHOLE) -J $(PAHOLE_FLAGS) $(MODULE_PAHOLE_FLAGS) --btf_base $(objtree)/vmlinux $@; \
47 $(RESOLVE_BTFIDS) -b $(objtree)/vmlinux $@; \
48 fi;
49
50# Same as newer-prereqs, but allows to exclude specified extra dependencies
51newer_prereqs_except = $(filter-out $(PHONY) $(1),$?)
52
53# Same as if_changed, but allows to exclude specified extra dependencies
54if_changed_except = $(if $(call newer_prereqs_except,$(2))$(cmd-check), \
55 $(cmd); \
56 printf '%s\n' 'savedcmd_$@ := $(make-cmd)' > $(dot-target).cmd, @:)
57
58# Re-generate module BTFs if either module's .ko or vmlinux changed
59%.ko: %.o %.mod.o .module-common.o $(objtree)/scripts/module.lds $(and $(CONFIG_DEBUG_INFO_BTF_MODULES),$(KBUILD_BUILTIN),$(objtree)/vmlinux) FORCE
60 +$(call if_changed_except,ld_ko_o,$(objtree)/vmlinux)
61ifdef CONFIG_DEBUG_INFO_BTF_MODULES
62 +$(if $(newer-prereqs),$(call cmd,btf_ko))
63endif
64 +$(call cmd,check_tracepoint)
65
66targets += $(modules:%.o=%.ko) $(modules:%.o=%.mod.o) .module-common.o
67
68# Add FORCE to the prerequisites of a target to force it to be always rebuilt.
69# ---------------------------------------------------------------------------
70
71PHONY += FORCE
72FORCE:
73
74# Read all saved command lines and dependencies for the $(targets) we
75# may be building above, using $(if_changed{,_dep}). As an
76# optimization, we don't need to read them if the target does not
77# exist, we will rebuild anyway in that case.
78
79existing-targets := $(wildcard $(sort $(targets)))
80
81-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
82
83.PHONY: $(PHONY)