#####################
    #			#
    # FoolOS Build Sys.	#
    #			#
    #####################


############ phony targets ############

.PHONY: all clean run


############ some constants ############

USB_STICK=/dev/sdg	#take care!

#here our kernel will be loaded by the bootloader.
KERNEL_START=0x10000

############ flags ############

CFLAGS=-ffreestanding -std=gnu99 -m32 -fno-asynchronous-unwind-tables -O0 
CFLAGS+= -I.
#CFLAGS+=-fdata-sections -ffunction-sections
#CFLAGS+= -Werror


############ source and object files ############

#kernel sources (asm and c)

SOURCES=$(wildcard ./kernel/*.c)
SOURCES+=$(wildcard ./lib/*/*.c)
ASMSOURCES=$(wildcard ./asm/*.asm)

#kernel object files

OBJECTS=$(patsubst %.c, %.o, $(SOURCES))
ASMOBJECTS=$(patsubst %.asm, %.o, $(ASMSOURCES))
KERNEL_ENTRY=./boot/kernel_entry.o

#master boot record asm

MBR=./boot/mbr.bin

#multiprocessor binary entry

MP_BIN=./boot/mp.bin


#some fillup data (zeros)

FILLUP=./data/fill.bin


############ final image (default target) ############

all: FoolOS.img FoolData.img

############ nasm assembling rules ############

%.o: %.asm
	nasm -f elf $^ -o $@

%.bin: %.asm
	nasm -f bin $^ -o $@


############ linking kernel binary ############

# the kernel_entry.o needs to be FIRST!!
kernel.bin: $(KERNEL_ENTRY) $(ASMOBJECTS) $(OBJECTS) 
	ld -o $@ -Ttext $(KERNEL_START) --oformat binary -melf_i386 $^ -O0 # --gc-sections --entry=kernel_main -v


############ fool-font ############

binfont.bin: data/binfont.src
	python tools/binarize.py $< $@


############ assembling of final image ############

# master boot record, kernel binary and fool-font 

FoolOS.img: $(MBR) kernel.bin $(FILLUP)
	cp $(FILLUP) $@
	dd if=$(MBR) of=$@ bs=1 seek=0 conv=notrunc
	dd if=kernel.bin of=$@ bs=1 seek=512 conv=notrunc

binfont.img:  binfont.bin
	cat $^ > $@

FoolData.img: binfont.bin
	cp $^ $@

############ vm stuff ############

# run in our local bochs (we need cirrus support for our vesa mode)

run: all
	~/opt/bochs-2.6.6/bochs -q -rc bochsdebug


############ cleanup ############

clean:
	-rm *.bin *.img bochs.log $(KERNEL_ENTRY) $(ASMOBJECTS) $(OBJECTS) $(FILLUP) $(MBR) $(MP_BIN) bochs.out ne2k-tx.log ne2k-txdump.txt

############ test stuff ############
stick:  FoolOS.img
	cat FoolOS.img > $(USB_STICK) && sync
	xxd $(USB_STICK)  | head -n 50