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 and EFI_ZBOOT_MACH_TYPE 5 6quiet_cmd_copy_and_pad = PAD $@ 7 cmd_copy_and_pad = cp $< $@ && \ 8 truncate -s $(shell hexdump -s16 -n4 -e '"%u"' $<) $@ 9 10# Pad the file to the size of the uncompressed image in memory, including BSS 11$(obj)/vmlinux.bin: $(obj)/$(EFI_ZBOOT_PAYLOAD) FORCE 12 $(call if_changed,copy_and_pad) 13 14comp-type-$(CONFIG_KERNEL_GZIP) := gzip 15comp-type-$(CONFIG_KERNEL_LZ4) := lz4 16comp-type-$(CONFIG_KERNEL_LZMA) := lzma 17comp-type-$(CONFIG_KERNEL_LZO) := lzo 18comp-type-$(CONFIG_KERNEL_XZ) := xzkern 19comp-type-$(CONFIG_KERNEL_ZSTD) := zstd22 20 21# in GZIP, the appended le32 carrying the uncompressed size is part of the 22# format, but in other cases, we just append it at the end for convenience, 23# causing the original tools to complain when checking image integrity. 24# So disregard it when calculating the payload size in the zimage header. 25zboot-method-y := $(comp-type-y)_with_size 26zboot-size-len-y := 12 27 28zboot-method-$(CONFIG_KERNEL_GZIP) := gzip 29zboot-size-len-$(CONFIG_KERNEL_GZIP) := 8 30 31# Copy the SizeOfHeaders and SizeOfCode fields from the payload to the end of 32# the compressed image. Note that this presupposes a PE header offset of 64 33# bytes, which is what arm64, RISC-V and LoongArch use. 34quiet_cmd_compwithsize = $(quiet_cmd_$(zboot-method-y)) 35 cmd_compwithsize = $(cmd_$(zboot-method-y)) && ( \ 36 dd status=none if=$< bs=4 count=1 skip=37 ; \ 37 dd status=none if=$< bs=4 count=1 skip=23 ) >> $@ 38 39$(obj)/vmlinuz: $(obj)/vmlinux.bin FORCE 40 $(call if_changed,compwithsize) 41 42OBJCOPYFLAGS_vmlinuz.o := -I binary -O $(EFI_ZBOOT_BFD_TARGET) \ 43 --rename-section .data=.gzdata,load,alloc,readonly,contents 44$(obj)/vmlinuz.o: $(obj)/vmlinuz FORCE 45 $(call if_changed,objcopy) 46 47AFLAGS_zboot-header.o += -DMACHINE_TYPE=IMAGE_FILE_MACHINE_$(EFI_ZBOOT_MACH_TYPE) \ 48 -DZBOOT_EFI_PATH="\"$(realpath $(obj)/vmlinuz.efi.elf)\"" \ 49 -DZBOOT_SIZE_LEN=$(zboot-size-len-y) \ 50 -DCOMP_TYPE="\"$(comp-type-y)\"" 51 52$(obj)/zboot-header.o: $(srctree)/drivers/firmware/efi/libstub/zboot-header.S FORCE 53 $(call if_changed_rule,as_o_S) 54 55ZBOOT_DEPS := $(obj)/zboot-header.o $(objtree)/drivers/firmware/efi/libstub/lib.a 56 57LDFLAGS_vmlinuz.efi.elf := -T $(srctree)/drivers/firmware/efi/libstub/zboot.lds 58$(obj)/vmlinuz.efi.elf: $(obj)/vmlinuz.o $(ZBOOT_DEPS) FORCE 59 $(call if_changed,ld) 60 61OBJCOPYFLAGS_vmlinuz.efi := -O binary 62$(obj)/vmlinuz.efi: $(obj)/vmlinuz.efi.elf FORCE 63 $(call if_changed,objcopy) 64 65targets += zboot-header.o vmlinux.bin vmlinuz vmlinuz.o vmlinuz.efi.elf vmlinuz.efi 66