ASM = $(wildcard *.s)
OBJ = $(ASM:.s=.o)
BIN = $(basename $(ASM))
ATT = $(ASM:.s=.att)

all: $(ATT) qemu

clean: kill
	-rm -rfv $(ATT) $(BIN) $(OBJ) *~

curses: $(BIN) | kill
	PROMPT_COMMAND='echo -en "\e]0;Type Ctrl-A X to exit\a"'
	qemu-system-i386 -display curses -drive file=$<,format=raw -serial mon:stdio

debug: qemu
	gdb -q $(BIN) \
	    -ex 'target remote 127.0.0.1:1234' \
	    -ex 'set architecture i8086' \
	    -ex 'layout asm' \
	    -ex 'layout regs' \
	    -ex 'b *0x7c00' \
	    -ex 'c'

kill:
	-killall -q gdb qemu-system-i386 || true
	
qemu: $(BIN) | kill
	qemu-system-i386 -drive file=$<,format=raw -s &> /dev/null &

$(BIN): $(OBJ)
	ld --oformat binary -Ttext 0x7c00 $< -o $@
	
%.att: %
	objdump -b binary -D -m i8086 $< > $@

%.o: %.s
	as $< -o $@

.PHONY: all clean curses debug kill qemu