#
# linux/arch/i386/boot/compressed/Makefile
#
# create a compressed vmlinux image from the original vmlinux
#

include ../Makefile.inc

HEAD = head.o

OBJECTS = $(HEAD) misc.o 

CFLAGS = -O2 -DSTDC_HEADERS -D__KERNEL__
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: rtems

rtems: piggy.o $(OBJECTS)
	$(LD) $(ZLINKFLAGS) -o rtems $(OBJECTS) piggy.o

brtems: piggy.o $(OBJECTS)
	$(LD) $(BZLINKFLAGS) -o brtems $(OBJECTS) piggy.o

head.o: head.S 
	$(CC) $(AFLAGS) -traditional -c head.S

piggy.o: $(RTEMS_IMAGE)
	tmppiggy=_tmp_$$$$piggy; \
	rm -f $$tmppiggy $$tmppiggy.gz $$tmppiggy.lnk; \
	$(OBJCOPY) $(RTEMS_IMAGE) $$tmppiggy; \
	gzip -f -9 < $$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 rtems brtems _tmp_* *.o
