1 # SPDX-License-Identifier: GPL-2.0
3 # linux/arch/s390/boot/compressed/Makefile
5 # create a compressed vmlinux image from the original vmlinux
13 obj-y := $(if $(CONFIG_KERNEL_UNCOMPRESSED),,decompressor.o) info.o
14 obj-$(CONFIG_KERNEL_ZSTD) += clz_ctz.o
15 obj-all := $(obj-y) piggy.o syms.o
16 targets := vmlinux.lds vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2
17 targets += vmlinux.bin.xz vmlinux.bin.lzma vmlinux.bin.lzo vmlinux.bin.lz4
18 targets += vmlinux.bin.zst
19 targets += info.bin syms.bin vmlinux.syms $(obj-all)
21 KBUILD_AFLAGS := $(KBUILD_AFLAGS_DECOMPRESSOR)
22 KBUILD_CFLAGS := $(KBUILD_CFLAGS_DECOMPRESSOR)
25 OBJECTS := $(addprefix $(obj)/,$(obj-y))
26 OBJECTS_ALL := $(addprefix $(obj)/,$(obj-all))
28 LDFLAGS_vmlinux := --oformat $(LD_BFD) -e startup --build-id=sha1 -T
29 $(obj)/vmlinux: $(obj)/vmlinux.lds $(objtree)/arch/s390/boot/startup.a $(OBJECTS_ALL) FORCE
32 LDFLAGS_vmlinux.syms := --oformat $(LD_BFD) -e startup -T
33 $(obj)/vmlinux.syms: $(obj)/vmlinux.lds $(objtree)/arch/s390/boot/startup.a $(OBJECTS) FORCE
36 quiet_cmd_dumpsyms = DUMPSYMS $<
38 $(NM) -n -S --format=bsd "$<" | sed -nE 's/^0*([0-9a-fA-F]+) 0*([0-9a-fA-F]+) [tT] ([^ ]*)$$/\1 \2 \3/p' | tr '\n' '\0' > "$@"
41 $(obj)/syms.bin: $(obj)/vmlinux.syms FORCE
42 $(call if_changed,dumpsyms)
44 OBJCOPYFLAGS_syms.o := -I binary -O elf64-s390 -B s390:64-bit --rename-section .data=.decompressor.syms
45 $(obj)/syms.o: $(obj)/syms.bin FORCE
46 $(call if_changed,objcopy)
48 OBJCOPYFLAGS_info.bin := -O binary --only-section=.vmlinux.info --set-section-flags .vmlinux.info=load
49 $(obj)/info.bin: vmlinux FORCE
50 $(call if_changed,objcopy)
52 OBJCOPYFLAGS_info.o := -I binary -O elf64-s390 -B s390:64-bit --rename-section .data=.vmlinux.info
53 $(obj)/info.o: $(obj)/info.bin FORCE
54 $(call if_changed,objcopy)
56 OBJCOPYFLAGS_vmlinux.bin := -O binary --remove-section=.comment --remove-section=.vmlinux.info -S
57 $(obj)/vmlinux.bin: vmlinux FORCE
58 $(call if_changed,objcopy)
60 vmlinux.bin.all-y := $(obj)/vmlinux.bin
62 suffix-$(CONFIG_KERNEL_GZIP) := .gz
63 suffix-$(CONFIG_KERNEL_BZIP2) := .bz2
64 suffix-$(CONFIG_KERNEL_LZ4) := .lz4
65 suffix-$(CONFIG_KERNEL_LZMA) := .lzma
66 suffix-$(CONFIG_KERNEL_LZO) := .lzo
67 suffix-$(CONFIG_KERNEL_XZ) := .xz
68 suffix-$(CONFIG_KERNEL_ZSTD) := .zst
70 $(obj)/vmlinux.bin.gz: $(vmlinux.bin.all-y) FORCE
71 $(call if_changed,gzip)
72 $(obj)/vmlinux.bin.bz2: $(vmlinux.bin.all-y) FORCE
73 $(call if_changed,bzip2)
74 $(obj)/vmlinux.bin.lz4: $(vmlinux.bin.all-y) FORCE
75 $(call if_changed,lz4)
76 $(obj)/vmlinux.bin.lzma: $(vmlinux.bin.all-y) FORCE
77 $(call if_changed,lzma)
78 $(obj)/vmlinux.bin.lzo: $(vmlinux.bin.all-y) FORCE
79 $(call if_changed,lzo)
80 $(obj)/vmlinux.bin.xz: $(vmlinux.bin.all-y) FORCE
81 $(call if_changed,xzkern)
82 $(obj)/vmlinux.bin.zst: $(vmlinux.bin.all-y) FORCE
83 $(call if_changed,zstd22)
85 OBJCOPYFLAGS_piggy.o := -I binary -O elf64-s390 -B s390:64-bit --rename-section .data=.vmlinux.bin.compressed
86 $(obj)/piggy.o: $(obj)/vmlinux.bin$(suffix-y) FORCE
87 $(call if_changed,objcopy)