1 # SPDX-License-Identifier: GPL-2.0
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
7 quiet_cmd_copy_and_pad = PAD $@
8 cmd_copy_and_pad = cp $< $@; \
9 truncate -s $$(hexdump -s16 -n4 -e '"%u"' $<) $@
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 $(call if_changed,copy_and_pad)
15 comp-type-$(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
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 := $(comp-type-y)_with_size
29 zboot-method-$(CONFIG_KERNEL_GZIP) := gzip
30 zboot-size-len-$(CONFIG_KERNEL_GZIP) := 0
32 $(obj)/vmlinuz: $(obj)/vmlinux.bin FORCE
33 $(call if_changed,$(zboot-method-y))
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 $(call if_changed,objcopy)
41 aflags-zboot-header-$(EFI_ZBOOT_FORWARD_CFI) := \
42 -DPE_DLL_CHAR_EX=IMAGE_DLLCHARACTERISTICS_EX_FORWARD_CFI_COMPAT
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)
50 $(obj)/zboot-header.o: $(srctree)/drivers/firmware/efi/libstub/zboot-header.S FORCE
51 $(call if_changed_rule,as_o_S)
53 ZBOOT_DEPS := $(obj)/zboot-header.o $(objtree)/drivers/firmware/efi/libstub/lib.a
55 LDFLAGS_vmlinuz.efi.elf := -T $(srctree)/drivers/firmware/efi/libstub/zboot.lds
56 $(obj)/vmlinuz.efi.elf: $(obj)/vmlinuz.o $(ZBOOT_DEPS) FORCE
59 OBJCOPYFLAGS_vmlinuz.efi := -O binary
60 $(obj)/vmlinuz.efi: $(obj)/vmlinuz.efi.elf FORCE
61 $(call if_changed,objcopy)
63 targets += zboot-header.o vmlinux.bin vmlinuz vmlinuz.o vmlinuz.efi.elf vmlinuz.efi