1 # SPDX-License-Identifier: GPL-2.0 !! 1 #
>> 2 # linux/arch/i386/boot/compressed/Makefile
2 # 3 #
3 # create a compressed vmlinux image from the o 4 # create a compressed vmlinux image from the original vmlinux
4 # 5 #
5 6
6 targets := vmlinux head.o misc.o piggy !! 7 HEAD = head.o
7 asflags-y := !! 8 SYSTEM = $(TOPDIR)/vmlinux
>> 9
>> 10 OBJECTS = $(HEAD) misc.o
>> 11
>> 12 ZLDFLAGS = -e startup_32
>> 13
>> 14 #
>> 15 # ZIMAGE_OFFSET is the load offset of the compression loader
>> 16 # BZIMAGE_OFFSET is the load offset of the high loaded compression loader
>> 17 #
>> 18 ZIMAGE_OFFSET = 0x1000
>> 19 BZIMAGE_OFFSET = 0x100000
>> 20
>> 21 ZLINKFLAGS = -Ttext $(ZIMAGE_OFFSET) $(ZLDFLAGS)
>> 22 BZLINKFLAGS = -Ttext $(BZIMAGE_OFFSET) $(ZLDFLAGS)
>> 23
>> 24 all: vmlinux
>> 25
>> 26 vmlinux: piggy.o $(OBJECTS)
>> 27 $(LD) $(ZLINKFLAGS) -o vmlinux $(OBJECTS) piggy.o
>> 28
>> 29 bvmlinux: piggy.o $(OBJECTS)
>> 30 $(LD) $(BZLINKFLAGS) -o bvmlinux $(OBJECTS) piggy.o
8 31
9 OBJECTS = $(obj)/head.o $(obj)/misc.o !! 32 head.o: head.S
>> 33 $(CC) $(AFLAGS) -traditional -c head.S
10 34
11 LDFLAGS_vmlinux := -T !! 35 comma := ,
12 36
13 $(obj)/vmlinux: $(obj)/vmlinux.lds $(OBJECTS) !! 37 misc.o: misc.c
14 $(call if_changed,ld) !! 38 $(CC) $(CFLAGS) -DKBUILD_BASENAME=$(subst $(comma),_,$(subst -,_,$(*F))) -c misc.c
15 39
16 LDFLAGS_piggy.o := -r --format binary --oforma !! 40 piggy.o: $(SYSTEM)
>> 41 tmppiggy=_tmp_$$$$piggy; \
>> 42 rm -f $$tmppiggy $$tmppiggy.gz $$tmppiggy.lnk; \
>> 43 $(OBJCOPY) $(SYSTEM) $$tmppiggy; \
>> 44 gzip -f -9 < $$tmppiggy > $$tmppiggy.gz; \
>> 45 echo "SECTIONS { .data : { input_len = .; LONG(input_data_end - input_data) input_data = .; *(.data) input_data_end = .; }}" > $$tmppiggy.lnk; \
>> 46 $(LD) -r -o piggy.o -b binary $$tmppiggy.gz -b elf32-i386 -T $$tmppiggy.lnk; \
>> 47 rm -f $$tmppiggy $$tmppiggy.gz $$tmppiggy.lnk
17 48
18 $(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/../v !! 49 clean:
19 $(call if_changed,ld) !! 50 rm -f vmlinux bvmlinux _tmp_*
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