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 # vmlinuz is:
   7 #       decompression code (*.o)
   8 #       asm globals (piggy.S), including:
   9 #               vmlinux.bin.(gz|bz2|lzma|...)
  10 #
  11 # vmlinux.bin is:
  12 #       vmlinux stripped of debugging and comments
  13 # vmlinux.bin.all is:
  14 #       vmlinux.bin + vmlinux.relocs
  15 # vmlinux.bin.(gz|bz2|lzma|...) is:
  16 #       (see scripts/Makefile.lib size_append)
  17 #       compressed vmlinux.bin.all + u32 size of vmlinux.bin.all
  18
  19 KASAN_SANITIZE                  := n
  20 OBJECT_FILES_NON_STANDARD       := y
  21
  22 # Prevents link failures: __sanitizer_cov_trace_pc() is not linked in.
  23 KCOV_INSTRUMENT         := n
  24
  25 targets := vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 vmlinux.bin.lzma \
  26         vmlinux.bin.xz vmlinux.bin.lzo vmlinux.bin.lz4
  27
  28 KBUILD_CFLAGS := -m$(BITS) -D__KERNEL__ $(LINUX_INCLUDE) -O2
  29 KBUILD_CFLAGS += -fno-strict-aliasing -fPIC
  30 KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
  31 cflags-$(CONFIG_X86_32) := -march=i386
  32 cflags-$(CONFIG_X86_64) := -mcmodel=small
  33 KBUILD_CFLAGS += $(cflags-y)
  34 KBUILD_CFLAGS += -mno-mmx -mno-sse
  35 KBUILD_CFLAGS += $(call cc-option,-ffreestanding)
  36 KBUILD_CFLAGS += $(call cc-option,-fno-stack-protector)
  37
  38 KBUILD_AFLAGS  := $(KBUILD_CFLAGS) -D__ASSEMBLY__
  39 GCOV_PROFILE := n
  40 UBSAN_SANITIZE :=n
  41
  42 LDFLAGS := -m elf_$(UTS_MACHINE)
  43 LDFLAGS_vmlinux := -T
  44
  45 hostprogs-y     := mkpiggy
  46 HOST_EXTRACFLAGS += -I$(srctree)/tools/include
  47
  48 vmlinux-objs-y := $(obj)/vmlinux.lds $(obj)/head_$(BITS).o $(obj)/misc.o \
  49         $(obj)/string.o $(obj)/cmdline.o \
  50         $(obj)/piggy.o $(obj)/cpuflags.o
  51
  52 vmlinux-objs-$(CONFIG_EARLY_PRINTK) += $(obj)/early_serial_console.o
  53 vmlinux-objs-$(CONFIG_RANDOMIZE_BASE) += $(obj)/aslr.o
  54
  55 $(obj)/eboot.o: KBUILD_CFLAGS += -fshort-wchar -mno-red-zone
  56
  57 vmlinux-objs-$(CONFIG_EFI_STUB) += $(obj)/eboot.o $(obj)/efi_stub_$(BITS).o \
  58         $(objtree)/drivers/firmware/efi/libstub/lib.a
  59 vmlinux-objs-$(CONFIG_EFI_MIXED) += $(obj)/efi_thunk_$(BITS).o
  60
  61 $(obj)/vmlinux: $(vmlinux-objs-y) FORCE
  62         $(call if_changed,ld)
  63         @:
  64
  65 OBJCOPYFLAGS_vmlinux.bin :=  -R .comment -S
  66 $(obj)/vmlinux.bin: vmlinux FORCE
  67         $(call if_changed,objcopy)
  68
  69 targets += $(patsubst $(obj)/%,%,$(vmlinux-objs-y)) vmlinux.bin.all vmlinux.relocs
  70
  71 CMD_RELOCS = arch/x86/tools/relocs
  72 quiet_cmd_relocs = RELOCS  $@
  73       cmd_relocs = $(CMD_RELOCS) $< > $@;$(CMD_RELOCS) --abs-relocs $<
  74 $(obj)/vmlinux.relocs: vmlinux FORCE
  75         $(call if_changed,relocs)
  76
  77 vmlinux.bin.all-y := $(obj)/vmlinux.bin
  78 vmlinux.bin.all-$(CONFIG_X86_NEED_RELOCS) += $(obj)/vmlinux.relocs
  79
  80 $(obj)/vmlinux.bin.gz: $(vmlinux.bin.all-y) FORCE
  81         $(call if_changed,gzip)
  82 $(obj)/vmlinux.bin.bz2: $(vmlinux.bin.all-y) FORCE
  83         $(call if_changed,bzip2)
  84 $(obj)/vmlinux.bin.lzma: $(vmlinux.bin.all-y) FORCE
  85         $(call if_changed,lzma)
  86 $(obj)/vmlinux.bin.xz: $(vmlinux.bin.all-y) FORCE
  87         $(call if_changed,xzkern)
  88 $(obj)/vmlinux.bin.lzo: $(vmlinux.bin.all-y) FORCE
  89         $(call if_changed,lzo)
  90 $(obj)/vmlinux.bin.lz4: $(vmlinux.bin.all-y) FORCE
  91         $(call if_changed,lz4)
  92
  93 suffix-$(CONFIG_KERNEL_GZIP)    := gz
  94 suffix-$(CONFIG_KERNEL_BZIP2)   := bz2
  95 suffix-$(CONFIG_KERNEL_LZMA)    := lzma
  96 suffix-$(CONFIG_KERNEL_XZ)      := xz
  97 suffix-$(CONFIG_KERNEL_LZO)     := lzo
  98 suffix-$(CONFIG_KERNEL_LZ4)     := lz4
  99
 100 RUN_SIZE = $(shell $(OBJDUMP) -h vmlinux | \
 101              $(CONFIG_SHELL) $(srctree)/arch/x86/tools/calc_run_size.sh)
 102 quiet_cmd_mkpiggy = MKPIGGY $@
 103       cmd_mkpiggy = $(obj)/mkpiggy $< $(RUN_SIZE) > $@ || ( rm -f $@ ; false )
 104
 105 targets += piggy.S
 106 $(obj)/piggy.S: $(obj)/vmlinux.bin.$(suffix-y) $(obj)/mkpiggy FORCE
 107         $(call if_changed,mkpiggy)