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) $(filter-out $(CC_FLAGS_CFI), $(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
33 $(extmod_prefix).module-common.o: $(srctree)/s !! 31 ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
34 $(call if_changed_dep,cc_o_c) !! 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 cmd_ld_ko_o += \
>> 43 $(objtree)/tools/objtool/objtool $(objtool_args) \
>> 44 $(@:.ko=$(prelink-ext).o);
>> 45
>> 46 endif # CONFIG_STACK_VALIDATION
>> 47
>> 48 endif # CONFIG_LTO_CLANG
35 49
36 quiet_cmd_ld_ko_o = LD [M] $@ 50 quiet_cmd_ld_ko_o = LD [M] $@
37 cmd_ld_ko_o = !! 51 cmd_ld_ko_o += \
38 $(LD) -r $(KBUILD_LDFLAGS) 52 $(LD) -r $(KBUILD_LDFLAGS) \
39 $(KBUILD_LDFLAGS_MODULE) $(LDF 53 $(KBUILD_LDFLAGS_MODULE) $(LDFLAGS_MODULE) \
40 -T scripts/module.lds -o $@ $( !! 54 -T scripts/module.lds -o $@ $(filter %.o, $^); \
>> 55 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
41 56
42 quiet_cmd_btf_ko = BTF [M] $@ 57 quiet_cmd_btf_ko = BTF [M] $@
43 cmd_btf_ko = 58 cmd_btf_ko = \
44 if [ ! -f vmlinux ]; then !! 59 if [ -f vmlinux ]; then \
45 printf "Skipping BTF generatio !! 60 LLVM_OBJCOPY="$(OBJCOPY)" $(PAHOLE) -J --btf_base vmlinux $@; \
46 else 61 else \
47 LLVM_OBJCOPY="$(OBJCOPY)" $(PA !! 62 printf "Skipping BTF generation for %s due to unavailability of vmlinux\n" $@ 1>&2; \
48 $(RESOLVE_BTFIDS) -b vmlinux $ <<
49 fi; 63 fi;
50 64
51 # Same as newer-prereqs, but allows to exclude 65 # Same as newer-prereqs, but allows to exclude specified extra dependencies
52 newer_prereqs_except = $(filter-out $(PHONY) $ 66 newer_prereqs_except = $(filter-out $(PHONY) $(1),$?)
53 67
54 # Same as if_changed, but allows to exclude sp 68 # Same as if_changed, but allows to exclude specified extra dependencies
55 if_changed_except = $(if $(call newer_prereqs_ 69 if_changed_except = $(if $(call newer_prereqs_except,$(2))$(cmd-check), \
56 $(cmd); 70 $(cmd); \
57 printf '%s\n' 'savedcmd_$@ := $(make-c !! 71 printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd, @:)
>> 72
58 73
59 # Re-generate module BTFs if either module's . 74 # Re-generate module BTFs if either module's .ko or vmlinux changed
60 %.ko: %.o %.mod.o $(extmod_prefix).module-comm !! 75 $(modules): %.ko: %$(prelink-ext).o %.mod.o scripts/module.lds $(if $(KBUILD_BUILTIN),vmlinux) FORCE
61 +$(call if_changed_except,ld_ko_o,vmli 76 +$(call if_changed_except,ld_ko_o,vmlinux)
62 ifdef CONFIG_DEBUG_INFO_BTF_MODULES 77 ifdef CONFIG_DEBUG_INFO_BTF_MODULES
63 +$(if $(newer-prereqs),$(call cmd,btf_ 78 +$(if $(newer-prereqs),$(call cmd,btf_ko))
64 endif 79 endif
65 80
66 targets += $(modules:%.o=%.ko) $(modules:%.o=% !! 81 targets += $(modules) $(modules:.ko=.mod.o)
67 82
68 # Add FORCE to the prerequisites of a target t !! 83 # Add FORCE to the prequisites of a target to force it to be always rebuilt.
69 # -------------------------------------------- 84 # ---------------------------------------------------------------------------
70 85
71 PHONY += FORCE 86 PHONY += FORCE
72 FORCE: 87 FORCE:
73 88
74 # Read all saved command lines and dependencie 89 # Read all saved command lines and dependencies for the $(targets) we
75 # may be building above, using $(if_changed{,_ 90 # may be building above, using $(if_changed{,_dep}). As an
76 # optimization, we don't need to read them if 91 # optimization, we don't need to read them if the target does not
77 # exist, we will rebuild anyway in that case. 92 # exist, we will rebuild anyway in that case.
78 93
79 existing-targets := $(wildcard $(sort $(target 94 existing-targets := $(wildcard $(sort $(targets)))
80 95
81 -include $(foreach f,$(existing-targets),$(dir 96 -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
82 97
83 .PHONY: $(PHONY) 98 .PHONY: $(PHONY)
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