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# SPDX-License-Identifier: GPL-2.0
# to be include'd by arch/$(ARCH)/boot/Makefile after setting
# EFI_ZBOOT_PAYLOAD, EFI_ZBOOT_BFD_TARGET, EFI_ZBOOT_MACH_TYPE and
# EFI_ZBOOT_FORWARD_CFI
quiet_cmd_copy_and_pad = PAD $@
cmd_copy_and_pad = cp $< $@; \
truncate -s $$(hexdump -s16 -n4 -e '"%u"' $<) $@
# Pad the file to the size of the uncompressed image in memory, including BSS
$(obj)/vmlinux.bin: $(obj)/$(EFI_ZBOOT_PAYLOAD) FORCE
$(call if_changed,copy_and_pad)
comp-type-$(CONFIG_KERNEL_GZIP) := gzip
comp-type-$(CONFIG_KERNEL_LZ4) := lz4
comp-type-$(CONFIG_KERNEL_LZMA) := lzma
comp-type-$(CONFIG_KERNEL_LZO) := lzo
comp-type-$(CONFIG_KERNEL_XZ) := xzkern
comp-type-$(CONFIG_KERNEL_ZSTD) := zstd22
# in GZIP, the appended le32 carrying the uncompressed size is part of the
# format, but in other cases, we just append it at the end for convenience,
# causing the original tools to complain when checking image integrity.
# So disregard it when calculating the payload size in the zimage header.
zboot-method-y := $(comp-type-y)_with_size
zboot-size-len-y := 4
zboot-method-$(CONFIG_KERNEL_GZIP) := gzip
zboot-size-len-$(CONFIG_KERNEL_GZIP) := 0
$(obj)/vmlinuz: $(obj)/vmlinux.bin FORCE
$(call if_changed,$(zboot-method-y))
# avoid eager evaluation to prevent references to non-existent build artifacts
OBJCOPYFLAGS_vmlinuz.o = -I binary -O $(EFI_ZBOOT_BFD_TARGET) $(EFI_ZBOOT_OBJCOPY_FLAGS) \
--rename-section .data=.gzdata,load,alloc,readonly,contents
$(obj)/vmlinuz.o: $(obj)/vmlinuz FORCE
$(call if_changed,objcopy)
aflags-zboot-header-$(EFI_ZBOOT_FORWARD_CFI) := \
-DPE_DLL_CHAR_EX=IMAGE_DLLCHARACTERISTICS_EX_FORWARD_CFI_COMPAT
AFLAGS_zboot-header.o += -DMACHINE_TYPE=IMAGE_FILE_MACHINE_$(EFI_ZBOOT_MACH_TYPE) \
-DZBOOT_EFI_PATH="\"$(realpath $(obj)/vmlinuz.efi.elf)\"" \
-DZBOOT_SIZE_LEN=$(zboot-size-len-y) \
-DCOMP_TYPE="\"$(comp-type-y)\"" \
$(aflags-zboot-header-y)
$(obj)/zboot-header.o: $(srctree)/drivers/firmware/efi/libstub/zboot-header.S FORCE
$(call if_changed_rule,as_o_S)
ZBOOT_DEPS := $(obj)/zboot-header.o $(objtree)/drivers/firmware/efi/libstub/lib.a
LDFLAGS_vmlinuz.efi.elf := -T $(srctree)/drivers/firmware/efi/libstub/zboot.lds
$(obj)/vmlinuz.efi.elf: $(obj)/vmlinuz.o $(ZBOOT_DEPS) FORCE
$(call if_changed,ld)
OBJCOPYFLAGS_vmlinuz.efi := -O binary
$(obj)/vmlinuz.efi: $(obj)/vmlinuz.efi.elf FORCE
$(call if_changed,objcopy)
targets += zboot-header.o vmlinux.bin vmlinuz vmlinuz.o vmlinuz.efi.elf vmlinuz.efi