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#
# linux/arch/i386/boot/compressed/Makefile
#
# create a compressed vmlinux image from the original vmlinux
#
HEAD = head.o
SYSTEM = $(TOPDIR)/vmlinux
OBJECTS = $(HEAD) misc.o
CFLAGS = -O2 -DSTDC_HEADERS
ZLDFLAGS = -e startup_32
#
# ZIMAGE_OFFSET is the load offset of the compression loader
# BZIMAGE_OFFSET is the load offset of the high loaded compression loader
#
ZIMAGE_OFFSET = 0x1000
BZIMAGE_OFFSET = 0x100000
ZLINKFLAGS = -Ttext $(ZIMAGE_OFFSET) $(ZLDFLAGS)
BZLINKFLAGS = -Ttext $(BZIMAGE_OFFSET) $(ZLDFLAGS)
all: vmlinux
vmlinux: piggy.o $(OBJECTS)
$(LD) $(ZLINKFLAGS) -o vmlinux $(OBJECTS) piggy.o
bvmlinux: piggy.o $(OBJECTS)
$(LD) $(BZLINKFLAGS) -o bvmlinux $(OBJECTS) piggy.o
head.o: head.S
$(CC) $(AFLAGS) -traditional -c head.S
piggy.o: $(SYSTEM)
tmppiggy=_tmp_$$$$piggy; \
rm -f $$tmppiggy $$tmppiggy.gz $$tmppiggy.lnk; \
$(OBJCOPY) $(SYSTEM) $$tmppiggy; \
gzip -f -9 < $$tmppiggy > $$tmppiggy.gz; \
echo "SECTIONS { .data : { input_len = .; LONG(input_data_end - input_data) input_data = .; *(.data) input_data_end = .; }}" > $$tmppiggy.lnk; \
$(LD) -m elf_i386 -r -o piggy.o -b binary $$tmppiggy.gz -b elf32-i386 -T $$tmppiggy.lnk; \
rm -f $$tmppiggy $$tmppiggy.gz $$tmppiggy.lnk
clean:
rm -f vmlinux bvmlinux _tmp_*
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