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5d45950d MY |
1 | # SPDX-License-Identifier: GPL-2.0-only |
2 | ||
3 | PHONY := __default | |
7a342e6c | 4 | __default: vmlinux.o modules.builtin.modinfo modules.builtin |
5d45950d MY |
5 | |
6 | include include/config/auto.conf | |
7 | include $(srctree)/scripts/Kbuild.include | |
8 | ||
b42d2306 MY |
9 | # for objtool |
10 | include $(srctree)/scripts/Makefile.lib | |
11 | ||
5d45950d MY |
12 | # Generate a linker script to ensure correct ordering of initcalls for Clang LTO |
13 | # --------------------------------------------------------------------------- | |
14 | ||
15 | quiet_cmd_gen_initcalls_lds = GEN $@ | |
16 | cmd_gen_initcalls_lds = \ | |
17 | $(PYTHON3) $(srctree)/scripts/jobserver-exec \ | |
18 | $(PERL) $(real-prereqs) > $@ | |
19 | ||
20 | .tmp_initcalls.lds: $(srctree)/scripts/generate_initcall_order.pl \ | |
32164845 | 21 | vmlinux.a $(KBUILD_VMLINUX_LIBS) FORCE |
5d45950d MY |
22 | $(call if_changed,gen_initcalls_lds) |
23 | ||
24 | targets := .tmp_initcalls.lds | |
25 | ||
26 | ifdef CONFIG_LTO_CLANG | |
27 | initcalls-lds := .tmp_initcalls.lds | |
28 | endif | |
29 | ||
b42d2306 MY |
30 | # objtool for vmlinux.o |
31 | # --------------------------------------------------------------------------- | |
32 | # | |
33 | # For LTO and IBT, objtool doesn't run on individual translation units. | |
34 | # Run everything on vmlinux instead. | |
35 | ||
36 | objtool-enabled := $(or $(delay-objtool),$(CONFIG_NOINSTR_VALIDATION)) | |
37 | ||
9ec6ab6e MY |
38 | vmlinux-objtool-args-$(delay-objtool) += $(objtool-args-y) |
39 | vmlinux-objtool-args-$(CONFIG_GCOV_KERNEL) += --no-unreachable | |
40 | vmlinux-objtool-args-$(CONFIG_NOINSTR_VALIDATION) += --noinstr $(if $(CONFIG_CPU_UNRET_ENTRY), --unret) | |
b42d2306 | 41 | |
9ec6ab6e | 42 | objtool-args = $(vmlinux-objtool-args-y) --link |
b42d2306 | 43 | |
5d45950d MY |
44 | # Link of vmlinux.o used for section mismatch analysis |
45 | # --------------------------------------------------------------------------- | |
46 | ||
47 | quiet_cmd_ld_vmlinux.o = LD $@ | |
48 | cmd_ld_vmlinux.o = \ | |
49 | $(LD) ${KBUILD_LDFLAGS} -r -o $@ \ | |
50 | $(addprefix -T , $(initcalls-lds)) \ | |
32164845 | 51 | --whole-archive vmlinux.a --no-whole-archive \ |
5d45950d | 52 | --start-group $(KBUILD_VMLINUX_LIBS) --end-group \ |
b42d2306 | 53 | $(cmd_objtool) |
5d45950d MY |
54 | |
55 | define rule_ld_vmlinux.o | |
56 | $(call cmd_and_savecmd,ld_vmlinux.o) | |
b42d2306 | 57 | $(call cmd,gen_objtooldep) |
5d45950d MY |
58 | endef |
59 | ||
32164845 | 60 | vmlinux.o: $(initcalls-lds) vmlinux.a $(KBUILD_VMLINUX_LIBS) FORCE |
5d45950d MY |
61 | $(call if_changed_rule,ld_vmlinux.o) |
62 | ||
63 | targets += vmlinux.o | |
64 | ||
7a342e6c MY |
65 | # module.builtin.modinfo |
66 | # --------------------------------------------------------------------------- | |
67 | ||
68 | OBJCOPYFLAGS_modules.builtin.modinfo := -j .modinfo -O binary | |
69 | ||
70 | targets += modules.builtin.modinfo | |
71 | modules.builtin.modinfo: vmlinux.o FORCE | |
72 | $(call if_changed,objcopy) | |
73 | ||
74 | # module.builtin | |
75 | # --------------------------------------------------------------------------- | |
76 | ||
77 | # The second line aids cases where multiple modules share the same object. | |
78 | ||
79 | quiet_cmd_modules_builtin = GEN $@ | |
80 | cmd_modules_builtin = \ | |
81 | tr '\0' '\n' < $< | \ | |
82 | sed -n 's/^[[:alnum:]:_]*\.file=//p' | \ | |
83 | tr ' ' '\n' | uniq | sed -e 's:^:kernel/:' -e 's/$$/.ko/' > $@ | |
84 | ||
85 | targets += modules.builtin | |
86 | modules.builtin: modules.builtin.modinfo FORCE | |
87 | $(call if_changed,modules_builtin) | |
88 | ||
5d45950d MY |
89 | # Add FORCE to the prequisites of a target to force it to be always rebuilt. |
90 | # --------------------------------------------------------------------------- | |
91 | ||
92 | PHONY += FORCE | |
93 | FORCE: | |
94 | ||
95 | # Read all saved command lines and dependencies for the $(targets) we | |
96 | # may be building above, using $(if_changed{,_dep}). As an | |
97 | # optimization, we don't need to read them if the target does not | |
98 | # exist, we will rebuild anyway in that case. | |
99 | ||
100 | existing-targets := $(wildcard $(sort $(targets))) | |
101 | ||
102 | -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) | |
103 | ||
104 | .PHONY: $(PHONY) |