drivers/firmware/efi/libstub/Makefile.zboot

   1 # SPDX-License-Identifier: GPL-2.0
   2
   3 # to be include'd by arch/$(ARCH)/boot/Makefile after setting
   4 # EFI_ZBOOT_PAYLOAD, EFI_ZBOOT_BFD_TARGET, EFI_ZBOOT_MACH_TYPE and
   5 # EFI_ZBOOT_FORWARD_CFI
   6
   7 quiet_cmd_copy_and_pad = PAD     $@
   8       cmd_copy_and_pad = cp $< $@ && \
   9                          truncate -s $(shell hexdump -s16 -n4 -e '"%u"' $<) $@
  10
  11 # Pad the file to the size of the uncompressed image in memory, including BSS
  12 $(obj)/vmlinux.bin: $(obj)/$(EFI_ZBOOT_PAYLOAD) FORCE
  13         $(call if_changed,copy_and_pad)
  14
  15 comp-type-$(CONFIG_KERNEL_GZIP)         := gzip
  16 comp-type-$(CONFIG_KERNEL_LZ4)          := lz4
  17 comp-type-$(CONFIG_KERNEL_LZMA)         := lzma
  18 comp-type-$(CONFIG_KERNEL_LZO)          := lzo
  19 comp-type-$(CONFIG_KERNEL_XZ)           := xzkern
  20 comp-type-$(CONFIG_KERNEL_ZSTD)         := zstd22
  21
  22 # in GZIP, the appended le32 carrying the uncompressed size is part of the
  23 # format, but in other cases, we just append it at the end for convenience,
  24 # causing the original tools to complain when checking image integrity.
  25 # So disregard it when calculating the payload size in the zimage header.
  26 zboot-method-y                         := $(comp-type-y)_with_size
  27 zboot-size-len-y                       := 4
  28
  29 zboot-method-$(CONFIG_KERNEL_GZIP)     := gzip
  30 zboot-size-len-$(CONFIG_KERNEL_GZIP)   := 0
  31
  32 $(obj)/vmlinuz: $(obj)/vmlinux.bin FORCE
  33         $(call if_changed,$(zboot-method-y))
  34
  35 # avoid eager evaluation to prevent references to non-existent build artifacts
  36 OBJCOPYFLAGS_vmlinuz.o = -I binary -O $(EFI_ZBOOT_BFD_TARGET) $(EFI_ZBOOT_OBJCOPY_FLAGS) \
  37                           --rename-section .data=.gzdata,load,alloc,readonly,contents
  38 $(obj)/vmlinuz.o: $(obj)/vmlinuz FORCE
  39         $(call if_changed,objcopy)
  40
  41 aflags-zboot-header-$(EFI_ZBOOT_FORWARD_CFI) := \
  42                 -DPE_DLL_CHAR_EX=IMAGE_DLLCHARACTERISTICS_EX_FORWARD_CFI_COMPAT
  43
  44 AFLAGS_zboot-header.o += -DMACHINE_TYPE=IMAGE_FILE_MACHINE_$(EFI_ZBOOT_MACH_TYPE) \
  45                          -DZBOOT_EFI_PATH="\"$(realpath $(obj)/vmlinuz.efi.elf)\"" \
  46                          -DZBOOT_SIZE_LEN=$(zboot-size-len-y) \
  47                          -DCOMP_TYPE="\"$(comp-type-y)\"" \
  48                          $(aflags-zboot-header-y)
  49
  50 $(obj)/zboot-header.o: $(srctree)/drivers/firmware/efi/libstub/zboot-header.S FORCE
  51         $(call if_changed_rule,as_o_S)
  52
  53 ZBOOT_DEPS := $(obj)/zboot-header.o $(objtree)/drivers/firmware/efi/libstub/lib.a
  54
  55 LDFLAGS_vmlinuz.efi.elf := -T $(srctree)/drivers/firmware/efi/libstub/zboot.lds
  56 $(obj)/vmlinuz.efi.elf: $(obj)/vmlinuz.o $(ZBOOT_DEPS) FORCE
  57         $(call if_changed,ld)
  58
  59 OBJCOPYFLAGS_vmlinuz.efi := -O binary
  60 $(obj)/vmlinuz.efi: $(obj)/vmlinuz.efi.elf FORCE
  61         $(call if_changed,objcopy)
  62
  63 targets += zboot-header.o vmlinux.bin vmlinuz vmlinuz.o vmlinuz.efi.elf vmlinuz.efi