arch/x86/boot/compressed/Makefile

   1 #
   2 # linux/arch/x86/boot/compressed/Makefile
   3 #
   4 # create a compressed vmlinux image from the original vmlinux
   5 #
   6
   7 targets := vmlinux vmlinux.bin vmlinux.bin.gz head_$(BITS).o misc.o piggy.o
   8
   9 KBUILD_CFLAGS := -m$(BITS) -D__KERNEL__ $(LINUX_INCLUDE) -O2
  10 KBUILD_CFLAGS += -fno-strict-aliasing -fPIC
  11 cflags-$(CONFIG_X86_64) := -mcmodel=small
  12 KBUILD_CFLAGS += $(cflags-y)
  13 KBUILD_CFLAGS += $(call cc-option,-ffreestanding)
  14 KBUILD_CFLAGS += $(call cc-option,-fno-stack-protector)
  15
  16 KBUILD_AFLAGS  := $(KBUILD_CFLAGS) -D__ASSEMBLY__
  17
  18 LDFLAGS := -m elf_$(UTS_MACHINE)
  19 LDFLAGS_vmlinux := -T
  20
  21 $(obj)/vmlinux: $(src)/vmlinux_$(BITS).lds $(obj)/head_$(BITS).o $(obj)/misc.o $(obj)/piggy.o FORCE
  22         $(call if_changed,ld)
  23         @:
  24
  25 OBJCOPYFLAGS_vmlinux.bin :=  -R .comment -S
  26 $(obj)/vmlinux.bin: vmlinux FORCE
  27         $(call if_changed,objcopy)
  28
  29
  30 ifeq ($(CONFIG_X86_32),y)
  31 targets += vmlinux.bin.all vmlinux.relocs
  32 hostprogs-y := relocs
  33
  34 quiet_cmd_relocs = RELOCS  $@
  35       cmd_relocs = $(obj)/relocs $< > $@;$(obj)/relocs --abs-relocs $<
  36 $(obj)/vmlinux.relocs: vmlinux $(obj)/relocs FORCE
  37         $(call if_changed,relocs)
  38
  39 vmlinux.bin.all-y := $(obj)/vmlinux.bin
  40 vmlinux.bin.all-$(CONFIG_RELOCATABLE) += $(obj)/vmlinux.relocs
  41 quiet_cmd_relocbin = BUILD   $@
  42       cmd_relocbin = cat $(filter-out FORCE,$^) > $@
  43 $(obj)/vmlinux.bin.all: $(vmlinux.bin.all-y) FORCE
  44         $(call if_changed,relocbin)
  45
  46 ifdef CONFIG_RELOCATABLE
  47 $(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin.all FORCE
  48         $(call if_changed,gzip)
  49 else
  50 $(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
  51         $(call if_changed,gzip)
  52 endif
  53 LDFLAGS_piggy.o := -r --format binary --oformat elf32-i386 -T
  54
  55 else
  56 $(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
  57         $(call if_changed,gzip)
  58
  59 LDFLAGS_piggy.o := -r --format binary --oformat elf64-x86-64 -T
  60 endif
  61
  62
  63 $(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.gz FORCE
  64         $(call if_changed,ld)