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
11
12obj-y	:= $(if $(CONFIG_KERNEL_UNCOMPRESSED),,head.o misc.o) piggy.o
13targets	:= vmlinux.lds vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2
14targets += vmlinux.bin.xz vmlinux.bin.lzma vmlinux.bin.lzo vmlinux.bin.lz4
15targets += vmlinux.scr.lds $(obj-y) $(if $(CONFIG_KERNEL_UNCOMPRESSED),,sizes.h)
16
17KBUILD_AFLAGS := $(KBUILD_AFLAGS_DECOMPRESSOR)
18KBUILD_CFLAGS := $(KBUILD_CFLAGS_DECOMPRESSOR)
19
20OBJECTS := $(addprefix $(obj)/,$(obj-y))
21
22LDFLAGS_vmlinux := --oformat $(LD_BFD) -e startup -T
23$(obj)/vmlinux: $(obj)/vmlinux.lds $(objtree)/arch/s390/boot/startup.a $(OBJECTS)
24	$(call if_changed,ld)
25
26# extract required uncompressed vmlinux symbols and adjust them to reflect offsets inside vmlinux.bin
27sed-sizes := -e 's/^\([0-9a-fA-F]*\) . \(__bss_start\|_end\)$$/\#define SZ\2 (0x\1 - 0x100000)/p'
28
29quiet_cmd_sizes = GEN     $@
30      cmd_sizes = $(NM) $< | sed -n $(sed-sizes) > $@
31
32$(obj)/sizes.h: vmlinux
33	$(call if_changed,sizes)
34
35AFLAGS_head.o += -I$(objtree)/$(obj)
36$(obj)/head.o: $(obj)/sizes.h
37
38CFLAGS_misc.o += -I$(objtree)/$(obj)
39$(obj)/misc.o: $(obj)/sizes.h
40
41OBJCOPYFLAGS_vmlinux.bin :=  -R .comment -S
42$(obj)/vmlinux.bin: vmlinux
43	$(call if_changed,objcopy)
44
45vmlinux.bin.all-y := $(obj)/vmlinux.bin
46
47suffix-$(CONFIG_KERNEL_GZIP)  := .gz
48suffix-$(CONFIG_KERNEL_BZIP2) := .bz2
49suffix-$(CONFIG_KERNEL_LZ4)  := .lz4
50suffix-$(CONFIG_KERNEL_LZMA)  := .lzma
51suffix-$(CONFIG_KERNEL_LZO)  := .lzo
52suffix-$(CONFIG_KERNEL_XZ)  := .xz
53
54$(obj)/vmlinux.bin.gz: $(vmlinux.bin.all-y)
55	$(call if_changed,gzip)
56$(obj)/vmlinux.bin.bz2: $(vmlinux.bin.all-y)
57	$(call if_changed,bzip2)
58$(obj)/vmlinux.bin.lz4: $(vmlinux.bin.all-y)
59	$(call if_changed,lz4)
60$(obj)/vmlinux.bin.lzma: $(vmlinux.bin.all-y)
61	$(call if_changed,lzma)
62$(obj)/vmlinux.bin.lzo: $(vmlinux.bin.all-y)
63	$(call if_changed,lzo)
64$(obj)/vmlinux.bin.xz: $(vmlinux.bin.all-y)
65	$(call if_changed,xzkern)
66
67LDFLAGS_piggy.o := -r --format binary --oformat $(LD_BFD) -T
68$(obj)/piggy.o: $(obj)/vmlinux.scr.lds $(obj)/vmlinux.bin$(suffix-y)
69	$(call if_changed,ld)
70
71chkbss := $(filter-out $(obj)/misc.o $(obj)/piggy.o,$(OBJECTS))
72chkbss-target := $(obj)/vmlinux.bin
73include $(srctree)/arch/s390/scripts/Makefile.chkbss
74