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.unstripped: .builtin-dtbs.o 51endif 52 53# vmlinux.unstripped 54# --------------------------------------------------------------------------- 55 56ifdef CONFIG_ARCH_WANTS_PRE_LINK_VMLINUX 57vmlinux.unstripped: arch/$(SRCARCH)/tools/vmlinux.arch.o 58 59arch/$(SRCARCH)/tools/vmlinux.arch.o: vmlinux.o FORCE 60 $(Q)$(MAKE) $(build)=arch/$(SRCARCH)/tools $@ 61endif 62 63ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) 64 65# Final link of vmlinux with optional arch pass after final link 66cmd_link_vmlinux = \ 67 $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)" "$@"; \ 68 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) 69 70targets += vmlinux.unstripped .vmlinux.export.o 71vmlinux.unstripped: scripts/link-vmlinux.sh vmlinux.o .vmlinux.export.o $(KBUILD_LDS) FORCE 72 +$(call if_changed_dep,link_vmlinux) 73ifdef CONFIG_DEBUG_INFO_BTF 74vmlinux.unstripped: $(RESOLVE_BTFIDS) $(srctree)/scripts/gen-btf.sh 75endif 76 77ifdef CONFIG_BUILDTIME_TABLE_SORT 78vmlinux.unstripped: scripts/sorttable 79endif 80 81# vmlinux 82# --------------------------------------------------------------------------- 83 84remove-section-y := .modinfo 85remove-section-$(CONFIG_ARCH_VMLINUX_NEEDS_RELOCS) += '.rel*' '!.rel*.dyn' 86# for compatibility with binutils < 2.32 87# https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=c12d9fa2afe7abcbe407a00e15719e1a1350c2a7 88remove-section-$(CONFIG_ARCH_VMLINUX_NEEDS_RELOCS) += '.rel.*' 89 90remove-symbols := -w --strip-unneeded-symbol='__mod_device_table__*' 91 92quiet_cmd_strip_relocs = OBJCOPY $@ 93 cmd_strip_relocs = $(OBJCOPY) $(addprefix --remove-section=,$(remove-section-y)) $(remove-symbols) $< $@ 94 95targets += vmlinux 96vmlinux: vmlinux.unstripped FORCE 97 $(call if_changed,strip_relocs) 98 99# modules.builtin.modinfo 100# --------------------------------------------------------------------------- 101 102quiet_cmd_modules_builtin_modinfo = GEN $@ 103 cmd_modules_builtin_modinfo = $(OBJCOPY) -O binary -j .modinfo --dump-section .modinfo=$@ $< /dev/null 104 105targets += modules.builtin.modinfo 106modules.builtin.modinfo: vmlinux.unstripped FORCE 107 $(call if_changed,modules_builtin_modinfo) 108 109# modules.builtin 110# --------------------------------------------------------------------------- 111 112__default: modules.builtin 113 114# The second line aids cases where multiple modules share the same object. 115 116quiet_cmd_modules_builtin = GEN $@ 117 cmd_modules_builtin = \ 118 tr '\0' '\n' < $< | \ 119 sed -n 's/^[[:alnum:]:_]*\.file=//p' | \ 120 tr ' ' '\n' | uniq | sed -e 's:^:kernel/:' -e 's/$$/.ko/' > $@ 121 122targets += modules.builtin 123modules.builtin: modules.builtin.modinfo FORCE 124 $(call if_changed,modules_builtin) 125 126# modules.builtin.ranges 127# --------------------------------------------------------------------------- 128ifdef CONFIG_BUILTIN_MODULE_RANGES 129__default: modules.builtin.ranges 130 131quiet_cmd_modules_builtin_ranges = GEN $@ 132 cmd_modules_builtin_ranges = gawk -f $(real-prereqs) > $@ 133 134targets += modules.builtin.ranges 135modules.builtin.ranges: $(srctree)/scripts/generate_builtin_ranges.awk \ 136 modules.builtin vmlinux.map vmlinux.o.map FORCE 137 $(call if_changed,modules_builtin_ranges) 138 139vmlinux.map: vmlinux.unstripped 140 @: 141 142endif 143 144# Add FORCE to the prerequisites of a target to force it to be always rebuilt. 145# --------------------------------------------------------------------------- 146 147PHONY += FORCE 148FORCE: 149 150# Read all saved command lines and dependencies for the $(targets) we 151# may be building above, using $(if_changed{,_dep}). As an 152# optimization, we don't need to read them if the target does not 153# exist, we will rebuild anyway in that case. 154 155existing-targets := $(wildcard $(sort $(targets))) 156 157-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 158 159.PHONY: $(PHONY) 160