xref: /linux-6.15/scripts/Makefile.vmlinux (revision 18e9944e) 
1# SPDX-License-Identifier: GPL-2.0-only
2
3PHONY := __default
4__default: vmlinux
5
6include include/config/auto.conf
7include $(srctree)/scripts/Kbuild.include
8include $(srctree)/scripts/Makefile.lib
9
10targets :=
11
12%.o: %.c FORCE
13	$(call if_changed_rule,cc_o_c)
14
15%.o: %.S FORCE
16	$(call if_changed_rule,as_o_S)
17
18# Built-in dtb
19# ---------------------------------------------------------------------------
20
21quiet_cmd_wrap_dtbs = WRAP    $@
22      cmd_wrap_dtbs = {							\
23	echo '\#include <asm-generic/vmlinux.lds.h>';			\
24	echo '.section .dtb.init.rodata,"a"';				\
25	while read dtb; do						\
26		symbase=__dtb_$$(basename -s .dtb "$${dtb}" | tr - _);	\
27		echo '.balign STRUCT_ALIGNMENT';			\
28		echo ".global $${symbase}_begin";			\
29		echo "$${symbase}_begin:";				\
30		echo '.incbin "'$$dtb'" ';				\
31		echo ".global $${symbase}_end";				\
32		echo "$${symbase}_end:";				\
33	done < $<;							\
34	} > $@
35
36.builtin-dtbs.S: .builtin-dtbs-list FORCE
37	$(call if_changed,wrap_dtbs)
38
39quiet_cmd_gen_dtbs_list = GEN     $@
40      cmd_gen_dtbs_list = \
41	$(if $(CONFIG_BUILTIN_DTB_NAME), echo "arch/$(SRCARCH)/boot/dts/$(CONFIG_BUILTIN_DTB_NAME).dtb",:) > $@
42
43.builtin-dtbs-list: arch/$(SRCARCH)/boot/dts/dtbs-list FORCE
44	$(call if_changed,$(if $(CONFIG_BUILTIN_DTB_ALL),copy,gen_dtbs_list))
45
46targets += .builtin-dtbs-list
47
48ifdef CONFIG_GENERIC_BUILTIN_DTB
49targets += .builtin-dtbs.S .builtin-dtbs.o
50vmlinux: .builtin-dtbs.o
51endif
52
53# vmlinux
54# ---------------------------------------------------------------------------
55
56ifdef CONFIG_MODULES
57targets += .vmlinux.export.o
58vmlinux: .vmlinux.export.o
59endif
60
61ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
62
63# Final link of vmlinux with optional arch pass after final link
64cmd_link_vmlinux =							\
65	$< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)";		\
66	$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
67
68targets += vmlinux
69vmlinux: scripts/link-vmlinux.sh vmlinux.o $(KBUILD_LDS) FORCE
70	+$(call if_changed_dep,link_vmlinux)
71ifdef CONFIG_DEBUG_INFO_BTF
72vmlinux: $(RESOLVE_BTFIDS)
73endif
74
75# module.builtin.ranges
76# ---------------------------------------------------------------------------
77ifdef CONFIG_BUILTIN_MODULE_RANGES
78__default: modules.builtin.ranges
79
80quiet_cmd_modules_builtin_ranges = GEN     $@
81      cmd_modules_builtin_ranges = gawk -f $(real-prereqs) > $@
82
83targets += modules.builtin.ranges
84modules.builtin.ranges: $(srctree)/scripts/generate_builtin_ranges.awk \
85			modules.builtin vmlinux.map vmlinux.o.map FORCE
86	$(call if_changed,modules_builtin_ranges)
87
88vmlinux.map: vmlinux
89	@:
90
91endif
92
93# Add FORCE to the prerequisites of a target to force it to be always rebuilt.
94# ---------------------------------------------------------------------------
95
96PHONY += FORCE
97FORCE:
98
99# Read all saved command lines and dependencies for the $(targets) we
100# may be building above, using $(if_changed{,_dep}). As an
101# optimization, we don't need to read them if the target does not
102# exist, we will rebuild anyway in that case.
103
104existing-targets := $(wildcard $(sort $(targets)))
105
106-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
107
108.PHONY: $(PHONY)
109