1 # SPDX-License-Identifier: GPL-2.0-only 1 # SPDX-License-Identifier: GPL-2.0-only
2 # ============================================ 2 # ===========================================================================
3 # Module final link 3 # Module final link
4 # ============================================ 4 # ===========================================================================
5 5
6 PHONY := __modfinal 6 PHONY := __modfinal
7 __modfinal: 7 __modfinal:
8 8
9 include include/config/auto.conf 9 include include/config/auto.conf
10 include $(srctree)/scripts/Kbuild.include 10 include $(srctree)/scripts/Kbuild.include
11 11
12 # for c_flags !! 12 # for c_flags and objtool_args
13 include $(srctree)/scripts/Makefile.lib 13 include $(srctree)/scripts/Makefile.lib
14 14
15 # find all modules listed in modules.order 15 # find all modules listed in modules.order
16 modules := $(call read-file, $(MODORDER)) !! 16 modules := $(sort $(shell cat $(MODORDER)))
17 17
18 __modfinal: $(modules:%.o=%.ko) !! 18 __modfinal: $(modules)
19 @: 19 @:
20 20
21 # modname and part-of-module are set to make c 21 # modname and part-of-module are set to make c_flags define proper module flags
22 modname = $(notdir $(@:.mod.o=)) 22 modname = $(notdir $(@:.mod.o=))
23 part-of-module = y 23 part-of-module = y
24 GCOV_PROFILE := n <<
25 KCSAN_SANITIZE := n <<
26 24
27 quiet_cmd_cc_o_c = CC [M] $@ 25 quiet_cmd_cc_o_c = CC [M] $@
28 cmd_cc_o_c = $(CC) $(filter-out $(CC_FLA !! 26 cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
29 27
30 %.mod.o: %.mod.c FORCE 28 %.mod.o: %.mod.c FORCE
31 $(call if_changed_dep,cc_o_c) 29 $(call if_changed_dep,cc_o_c)
32 30
>> 31 ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
>> 32
>> 33 ifdef CONFIG_LTO_CLANG
>> 34 # With CONFIG_LTO_CLANG, reuse the object file we compiled for modpost to
>> 35 # avoid a second slow LTO link
>> 36 prelink-ext := .lto
>> 37
>> 38 # ELF processing was skipped earlier because we didn't have native code,
>> 39 # so let's now process the prelinked binary before we link the module.
>> 40
>> 41 ifdef CONFIG_STACK_VALIDATION
>> 42 ifneq ($(SKIP_STACK_VALIDATION),1)
>> 43 cmd_ld_ko_o += \
>> 44 $(objtree)/tools/objtool/objtool $(objtool_args) \
>> 45 $(@:.ko=$(prelink-ext).o);
>> 46
>> 47 endif # SKIP_STACK_VALIDATION
>> 48 endif # CONFIG_STACK_VALIDATION
>> 49
>> 50 endif # CONFIG_LTO_CLANG
>> 51
33 quiet_cmd_ld_ko_o = LD [M] $@ 52 quiet_cmd_ld_ko_o = LD [M] $@
34 cmd_ld_ko_o += 53 cmd_ld_ko_o += \
35 $(LD) -r $(KBUILD_LDFLAGS) 54 $(LD) -r $(KBUILD_LDFLAGS) \
36 $(KBUILD_LDFLAGS_MODULE) $(LDF 55 $(KBUILD_LDFLAGS_MODULE) $(LDFLAGS_MODULE) \
37 -T scripts/module.lds -o $@ $( !! 56 -T scripts/module.lds -o $@ $(filter %.o, $^); \
>> 57 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
38 58
39 quiet_cmd_btf_ko = BTF [M] $@ 59 quiet_cmd_btf_ko = BTF [M] $@
40 cmd_btf_ko = 60 cmd_btf_ko = \
41 if [ ! -f vmlinux ]; then !! 61 if [ -f vmlinux ]; then \
42 printf "Skipping BTF generatio !! 62 LLVM_OBJCOPY="$(OBJCOPY)" $(PAHOLE) -J --btf_base vmlinux $@; \
43 else 63 else \
44 LLVM_OBJCOPY="$(OBJCOPY)" $(PA !! 64 printf "Skipping BTF generation for %s due to unavailability of vmlinux\n" $@ 1>&2; \
45 $(RESOLVE_BTFIDS) -b vmlinux $ <<
46 fi; 65 fi;
47 66
48 # Same as newer-prereqs, but allows to exclude 67 # Same as newer-prereqs, but allows to exclude specified extra dependencies
49 newer_prereqs_except = $(filter-out $(PHONY) $ 68 newer_prereqs_except = $(filter-out $(PHONY) $(1),$?)
50 69
51 # Same as if_changed, but allows to exclude sp 70 # Same as if_changed, but allows to exclude specified extra dependencies
52 if_changed_except = $(if $(call newer_prereqs_ 71 if_changed_except = $(if $(call newer_prereqs_except,$(2))$(cmd-check), \
53 $(cmd); 72 $(cmd); \
54 printf '%s\n' 'savedcmd_$@ := $(make-c !! 73 printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd, @:)
>> 74
55 75
56 # Re-generate module BTFs if either module's . 76 # Re-generate module BTFs if either module's .ko or vmlinux changed
57 %.ko: %.o %.mod.o scripts/module.lds $(and $(C !! 77 $(modules): %.ko: %$(prelink-ext).o %.mod.o scripts/module.lds $(if $(KBUILD_BUILTIN),vmlinux) FORCE
58 +$(call if_changed_except,ld_ko_o,vmli 78 +$(call if_changed_except,ld_ko_o,vmlinux)
59 ifdef CONFIG_DEBUG_INFO_BTF_MODULES 79 ifdef CONFIG_DEBUG_INFO_BTF_MODULES
60 +$(if $(newer-prereqs),$(call cmd,btf_ 80 +$(if $(newer-prereqs),$(call cmd,btf_ko))
61 endif 81 endif
62 82
63 targets += $(modules:%.o=%.ko) $(modules:%.o=% !! 83 targets += $(modules) $(modules:.ko=.mod.o)
64 84
65 # Add FORCE to the prerequisites of a target t !! 85 # Add FORCE to the prequisites of a target to force it to be always rebuilt.
66 # -------------------------------------------- 86 # ---------------------------------------------------------------------------
67 87
68 PHONY += FORCE 88 PHONY += FORCE
69 FORCE: 89 FORCE:
70 90
71 # Read all saved command lines and dependencie 91 # Read all saved command lines and dependencies for the $(targets) we
72 # may be building above, using $(if_changed{,_ 92 # may be building above, using $(if_changed{,_dep}). As an
73 # optimization, we don't need to read them if 93 # optimization, we don't need to read them if the target does not
74 # exist, we will rebuild anyway in that case. 94 # exist, we will rebuild anyway in that case.
75 95
76 existing-targets := $(wildcard $(sort $(target 96 existing-targets := $(wildcard $(sort $(targets)))
77 97
78 -include $(foreach f,$(existing-targets),$(dir 98 -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
79 99
80 .PHONY: $(PHONY) 100 .PHONY: $(PHONY)
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