scripts/Makefile.vmlinux

   1 # SPDX-License-Identifier: GPL-2.0-only
   2
   3 PHONY := __default
   4 __default: vmlinux
   5
   6 include include/config/auto.conf
   7 include $(srctree)/scripts/Kbuild.include
   8 include $(srctree)/scripts/Makefile.lib
   9
  10 targets :=
  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
  21 quiet_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
  39 quiet_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 $(CONFIG_BUILTIN_DTB_ALL),copy,gen_dtbs_list))
  45
  46 targets += .builtin-dtbs-list
  47
  48 ifdef CONFIG_GENERIC_BUILTIN_DTB
  49 targets += .builtin-dtbs.S .builtin-dtbs.o
  50 vmlinux: .builtin-dtbs.o
  51 endif
  52
  53 # vmlinux
  54 # ---------------------------------------------------------------------------
  55
  56 ifdef CONFIG_MODULES
  57 targets += .vmlinux.export.o
  58 vmlinux: .vmlinux.export.o
  59 endif
  60
  61 ifdef CONFIG_ARCH_WANTS_PRE_LINK_VMLINUX
  62 vmlinux: arch/$(SRCARCH)/tools/vmlinux.arch.o
  63
  64 arch/$(SRCARCH)/tools/vmlinux.arch.o: vmlinux.o FORCE
  65         $(Q)$(MAKE) $(build)=arch/$(SRCARCH)/tools $@
  66 endif
  67
  68 ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
  69
  70 # Final link of vmlinux with optional arch pass after final link
  71 cmd_link_vmlinux =                                                      \
  72         $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)";            \
  73         $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
  74
  75 targets += vmlinux
  76 vmlinux: scripts/link-vmlinux.sh vmlinux.o $(KBUILD_LDS) FORCE
  77         +$(call if_changed_dep,link_vmlinux)
  78 ifdef CONFIG_DEBUG_INFO_BTF
  79 vmlinux: $(RESOLVE_BTFIDS)
  80 endif
  81
  82 # module.builtin.ranges
  83 # ---------------------------------------------------------------------------
  84 ifdef CONFIG_BUILTIN_MODULE_RANGES
  85 __default: modules.builtin.ranges
  86
  87 quiet_cmd_modules_builtin_ranges = GEN     $@
  88       cmd_modules_builtin_ranges = gawk -f $(real-prereqs) > $@
  89
  90 targets += modules.builtin.ranges
  91 modules.builtin.ranges: $(srctree)/scripts/generate_builtin_ranges.awk \
  92                         modules.builtin vmlinux.map vmlinux.o.map FORCE
  93         $(call if_changed,modules_builtin_ranges)
  94
  95 vmlinux.map: vmlinux
  96         @:
  97
  98 endif
  99
 100 # Add FORCE to the prerequisites of a target to force it to be always rebuilt.
 101 # ---------------------------------------------------------------------------
 102
 103 PHONY += FORCE
 104 FORCE:
 105
 106 # Read all saved command lines and dependencies for the $(targets) we
 107 # may be building above, using $(if_changed{,_dep}). As an
 108 # optimization, we don't need to read them if the target does not
 109 # exist, we will rebuild anyway in that case.
 110
 111 existing-targets := $(wildcard $(sort $(targets)))
 112
 113 -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
 114
 115 .PHONY: $(PHONY)