#
# 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
BZ2OBJECTS = $(HEAD) bz2misc.o

ZLDFLAGS = -e startup_32

ifeq ($(CONFIG_LSM),y)
# if we have a StackGuard compiler, then we need to turn off the canary death handler stuff
CFLAGS += $(shell if $(CC) -fno-canary-all-functions -S -o /dev/null -xc /dev/null >/dev/null 2>&1; then echo "-fno-canary-all-functions"; fi)
CFLAGS += $(shell if $(CC) -mno-terminator-canary -S -o /dev/null -xc /dev/null >/dev/null 2>&1; then echo "-mno-terminator-canary"; fi)
endif

#
# 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

bz2bvmlinux: bz2piggy.o $(BZ2OBJECTS)
	$(LD) $(BZLINKFLAGS) -o bz2bvmlinux $(BZ2OBJECTS) bz2piggy.o

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

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

comma	:= ,

misc.o: misc.c
	$(CC) $(CFLAGS) -DKBUILD_BASENAME=$(subst $(comma),_,$(subst -,_,$(*F))) -c misc.c

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) -r -o piggy.o -b binary $$tmppiggy.gz -b elf32-i386 -T $$tmppiggy.lnk; \
	rm -f $$tmppiggy $$tmppiggy.gz $$tmppiggy.lnk

bz2piggy.o:	$(SYSTEM)
	tmppiggy=_tmp_$$$$piggy; \
	rm -f $$tmppiggy $$tmppiggy.bz2 $$tmppiggy.lnk; \
	$(OBJCOPY) $(SYSTEM) $$tmppiggy; \
	bzip2 -f -9 < $$tmppiggy > $$tmppiggy.bz2; \
	echo "SECTIONS { .data : { input_len = .; LONG(input_data_end - input_data) input_data = .; *(.data) input_data_end = .; }}" > $$tmppiggy.lnk; \
	$(LD) -m elf_i386 -r -o bz2piggy.o -b binary $$tmppiggy.bz2 -b elf32-i386 -T $$tmppiggy.lnk; \
	rm -f $$tmppiggy $$tmppiggy.bz2 $$tmppiggy.lnk

clean:
	rm -f vmlinux bvmlinux bz2bvmlinux _tmp_*