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