1# SPDX-License-Identifier: GPL-2.0
2#
3# linux/arch/s390/boot/compressed/Makefile
4#
5# create a compressed vmlinux image from the original vmlinux
6#
7
8KCOV_INSTRUMENT := n
9GCOV_PROFILE := n
10UBSAN_SANITIZE := n
11KASAN_SANITIZE := n
12KCSAN_SANITIZE := n
13
14obj-y	:= $(if $(CONFIG_KERNEL_UNCOMPRESSED),,decompressor.o) info.o
15obj-$(CONFIG_KERNEL_ZSTD) += clz_ctz.o
16obj-all := $(obj-y) piggy.o syms.o
17targets	:= vmlinux.lds vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2
18targets += vmlinux.bin.xz vmlinux.bin.lzma vmlinux.bin.lzo vmlinux.bin.lz4
19targets += vmlinux.bin.zst
20targets += info.bin syms.bin vmlinux.syms $(obj-all)
21
22KBUILD_AFLAGS := $(KBUILD_AFLAGS_DECOMPRESSOR)
23KBUILD_CFLAGS := $(KBUILD_CFLAGS_DECOMPRESSOR)
24OBJCOPYFLAGS :=
25
26OBJECTS := $(addprefix $(obj)/,$(obj-y))
27OBJECTS_ALL := $(addprefix $(obj)/,$(obj-all))
28
29LDFLAGS_vmlinux := --oformat $(LD_BFD) -e startup --build-id=sha1 -T
30$(obj)/vmlinux: $(obj)/vmlinux.lds $(objtree)/arch/s390/boot/startup.a $(OBJECTS_ALL) FORCE
31	$(call if_changed,ld)
32
33LDFLAGS_vmlinux.syms := --oformat $(LD_BFD) -e startup -T
34$(obj)/vmlinux.syms: $(obj)/vmlinux.lds $(objtree)/arch/s390/boot/startup.a $(OBJECTS) FORCE
35	$(call if_changed,ld)
36
37quiet_cmd_dumpsyms = DUMPSYMS $<
38define cmd_dumpsyms
39	$(NM) -n -S --format=bsd "$<" | sed -nE 's/^0*([0-9a-fA-F]+) 0*([0-9a-fA-F]+) [tT] ([^ ]*)$$/\1 \2 \3/p' | tr '\n' '\0' > "$@"
40endef
41
42$(obj)/syms.bin: $(obj)/vmlinux.syms FORCE
43	$(call if_changed,dumpsyms)
44
45OBJCOPYFLAGS_syms.o := -I binary -O elf64-s390 -B s390:64-bit --rename-section .data=.decompressor.syms
46$(obj)/syms.o: $(obj)/syms.bin FORCE
47	$(call if_changed,objcopy)
48
49OBJCOPYFLAGS_info.bin := -O binary --only-section=.vmlinux.info --set-section-flags .vmlinux.info=load
50$(obj)/info.bin: vmlinux FORCE
51	$(call if_changed,objcopy)
52
53OBJCOPYFLAGS_info.o := -I binary -O elf64-s390 -B s390:64-bit --rename-section .data=.vmlinux.info
54$(obj)/info.o: $(obj)/info.bin FORCE
55	$(call if_changed,objcopy)
56
57OBJCOPYFLAGS_vmlinux.bin := -O binary --remove-section=.comment --remove-section=.vmlinux.info -S
58$(obj)/vmlinux.bin: vmlinux FORCE
59	$(call if_changed,objcopy)
60
61vmlinux.bin.all-y := $(obj)/vmlinux.bin
62
63suffix-$(CONFIG_KERNEL_GZIP)  := .gz
64suffix-$(CONFIG_KERNEL_BZIP2) := .bz2
65suffix-$(CONFIG_KERNEL_LZ4)  := .lz4
66suffix-$(CONFIG_KERNEL_LZMA)  := .lzma
67suffix-$(CONFIG_KERNEL_LZO)  := .lzo
68suffix-$(CONFIG_KERNEL_XZ)  := .xz
69suffix-$(CONFIG_KERNEL_ZSTD)  := .zst
70
71$(obj)/vmlinux.bin.gz: $(vmlinux.bin.all-y) FORCE
72	$(call if_changed,gzip)
73$(obj)/vmlinux.bin.bz2: $(vmlinux.bin.all-y) FORCE
74	$(call if_changed,bzip2)
75$(obj)/vmlinux.bin.lz4: $(vmlinux.bin.all-y) FORCE
76	$(call if_changed,lz4)
77$(obj)/vmlinux.bin.lzma: $(vmlinux.bin.all-y) FORCE
78	$(call if_changed,lzma)
79$(obj)/vmlinux.bin.lzo: $(vmlinux.bin.all-y) FORCE
80	$(call if_changed,lzo)
81$(obj)/vmlinux.bin.xz: $(vmlinux.bin.all-y) FORCE
82	$(call if_changed,xzkern)
83$(obj)/vmlinux.bin.zst: $(vmlinux.bin.all-y) FORCE
84	$(call if_changed,zstd22)
85
86OBJCOPYFLAGS_piggy.o := -I binary -O elf64-s390 -B s390:64-bit --rename-section .data=.vmlinux.bin.compressed
87$(obj)/piggy.o: $(obj)/vmlinux.bin$(suffix-y) FORCE
88	$(call if_changed,objcopy)
89