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 $(CONFIG_BUILTIN_DTB_ALL),copy,gen_dtbs_list)) 45 46targets += .builtin-dtbs-list 47 48ifdef CONFIG_GENERIC_BUILTIN_DTB 49targets += .builtin-dtbs.S .builtin-dtbs.o 50vmlinux: .builtin-dtbs.o 51endif 52 53# vmlinux 54# --------------------------------------------------------------------------- 55 56ifdef CONFIG_MODULES 57targets += .vmlinux.export.o 58vmlinux: .vmlinux.export.o 59endif 60 61ifdef CONFIG_ARCH_WANTS_PRE_LINK_VMLINUX 62vmlinux: arch/$(SRCARCH)/tools/vmlinux.arch.o 63 64arch/$(SRCARCH)/tools/vmlinux.arch.o: vmlinux.o FORCE 65 $(Q)$(MAKE) $(build)=arch/$(SRCARCH)/tools $@ 66endif 67 68ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) 69 70# Final link of vmlinux with optional arch pass after final link 71cmd_link_vmlinux = \ 72 $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)"; \ 73 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) 74 75targets += vmlinux 76vmlinux: scripts/link-vmlinux.sh vmlinux.o $(KBUILD_LDS) FORCE 77 +$(call if_changed_dep,link_vmlinux) 78ifdef CONFIG_DEBUG_INFO_BTF 79vmlinux: $(RESOLVE_BTFIDS) 80endif 81 82ifdef CONFIG_BUILDTIME_TABLE_SORT 83vmlinux: scripts/sorttable 84endif 85 86# module.builtin.ranges 87# --------------------------------------------------------------------------- 88ifdef CONFIG_BUILTIN_MODULE_RANGES 89__default: modules.builtin.ranges 90 91quiet_cmd_modules_builtin_ranges = GEN $@ 92 cmd_modules_builtin_ranges = gawk -f $(real-prereqs) > $@ 93 94targets += modules.builtin.ranges 95modules.builtin.ranges: $(srctree)/scripts/generate_builtin_ranges.awk \ 96 modules.builtin vmlinux.map vmlinux.o.map FORCE 97 $(call if_changed,modules_builtin_ranges) 98 99vmlinux.map: vmlinux 100 @: 101 102endif 103 104# Add FORCE to the prerequisites of a target to force it to be always rebuilt. 105# --------------------------------------------------------------------------- 106 107PHONY += FORCE 108FORCE: 109 110# Read all saved command lines and dependencies for the $(targets) we 111# may be building above, using $(if_changed{,_dep}). As an 112# optimization, we don't need to read them if the target does not 113# exist, we will rebuild anyway in that case. 114 115existing-targets := $(wildcard $(sort $(targets))) 116 117-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 118 119.PHONY: $(PHONY) 120