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 12ifdef CONFIG_ARCH_VMLINUX_NEEDS_RELOCS 13vmlinux-final := vmlinux.unstripped 14 15quiet_cmd_strip_relocs = RSTRIP $@ 16 cmd_strip_relocs = $(OBJCOPY) --remove-section='.rel*' --remove-section=!'.rel*.dyn' $< $@ 17 18vmlinux: $(vmlinux-final) FORCE 19 $(call if_changed,strip_relocs) 20 21targets += vmlinux 22else 23vmlinux-final := vmlinux 24endif 25 26%.o: %.c FORCE 27 $(call if_changed_rule,cc_o_c) 28 29%.o: %.S FORCE 30 $(call if_changed_rule,as_o_S) 31 32# Built-in dtb 33# --------------------------------------------------------------------------- 34 35quiet_cmd_wrap_dtbs = WRAP $@ 36 cmd_wrap_dtbs = { \ 37 echo '\#include <asm-generic/vmlinux.lds.h>'; \ 38 echo '.section .dtb.init.rodata,"a"'; \ 39 while read dtb; do \ 40 symbase=__dtb_$$(basename -s .dtb "$${dtb}" | tr - _); \ 41 echo '.balign STRUCT_ALIGNMENT'; \ 42 echo ".global $${symbase}_begin"; \ 43 echo "$${symbase}_begin:"; \ 44 echo '.incbin "'$$dtb'" '; \ 45 echo ".global $${symbase}_end"; \ 46 echo "$${symbase}_end:"; \ 47 done < $<; \ 48 } > $@ 49 50.builtin-dtbs.S: .builtin-dtbs-list FORCE 51 $(call if_changed,wrap_dtbs) 52 53quiet_cmd_gen_dtbs_list = GEN $@ 54 cmd_gen_dtbs_list = \ 55 $(if $(CONFIG_BUILTIN_DTB_NAME), echo "arch/$(SRCARCH)/boot/dts/$(CONFIG_BUILTIN_DTB_NAME).dtb",:) > $@ 56 57.builtin-dtbs-list: arch/$(SRCARCH)/boot/dts/dtbs-list FORCE 58 $(call if_changed,$(if $(CONFIG_BUILTIN_DTB_ALL),copy,gen_dtbs_list)) 59 60targets += .builtin-dtbs-list 61 62ifdef CONFIG_GENERIC_BUILTIN_DTB 63targets += .builtin-dtbs.S .builtin-dtbs.o 64$(vmlinux-final): .builtin-dtbs.o 65endif 66 67# vmlinux 68# --------------------------------------------------------------------------- 69 70ifdef CONFIG_MODULES 71targets += .vmlinux.export.o 72$(vmlinux-final): .vmlinux.export.o 73endif 74 75ifdef CONFIG_ARCH_WANTS_PRE_LINK_VMLINUX 76$(vmlinux-final): arch/$(SRCARCH)/tools/vmlinux.arch.o 77 78arch/$(SRCARCH)/tools/vmlinux.arch.o: vmlinux.o FORCE 79 $(Q)$(MAKE) $(build)=arch/$(SRCARCH)/tools $@ 80endif 81 82ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) 83 84# Final link of vmlinux with optional arch pass after final link 85cmd_link_vmlinux = \ 86 $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)" "$@"; \ 87 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) 88 89targets += $(vmlinux-final) 90$(vmlinux-final): scripts/link-vmlinux.sh vmlinux.o $(KBUILD_LDS) FORCE 91 +$(call if_changed_dep,link_vmlinux) 92ifdef CONFIG_DEBUG_INFO_BTF 93$(vmlinux-final): $(RESOLVE_BTFIDS) 94endif 95 96ifdef CONFIG_BUILDTIME_TABLE_SORT 97$(vmlinux-final): scripts/sorttable 98endif 99 100# modules.builtin.ranges 101# --------------------------------------------------------------------------- 102ifdef CONFIG_BUILTIN_MODULE_RANGES 103__default: modules.builtin.ranges 104 105quiet_cmd_modules_builtin_ranges = GEN $@ 106 cmd_modules_builtin_ranges = gawk -f $(real-prereqs) > $@ 107 108targets += modules.builtin.ranges 109modules.builtin.ranges: $(srctree)/scripts/generate_builtin_ranges.awk \ 110 modules.builtin vmlinux.map vmlinux.o.map FORCE 111 $(call if_changed,modules_builtin_ranges) 112 113vmlinux.map: $(vmlinux-final) 114 @: 115 116endif 117 118# Add FORCE to the prerequisites of a target to force it to be always rebuilt. 119# --------------------------------------------------------------------------- 120 121PHONY += FORCE 122FORCE: 123 124# Read all saved command lines and dependencies for the $(targets) we 125# may be building above, using $(if_changed{,_dep}). As an 126# optimization, we don't need to read them if the target does not 127# exist, we will rebuild anyway in that case. 128 129existing-targets := $(wildcard $(sort $(targets))) 130 131-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 132 133.PHONY: $(PHONY) 134