OBJS = \
	8253pit.o\
	bio.o\
	console.o\
	exec.o\
	file.o\
	fs.o\
	ide.o\
	ioapic.o\
	kalloc.o\
	kbd.o\
	lapic.o\
	main.o\
	mp.o\
	picirq.o\
	pipe.o\
	proc.o\
	setjmp.o\
	spinlock.o\
	string.o\
	syscall.o\
	sysfile.o\
	sysproc.o\
	trapasm.o\
	trap.o\
	vectors.o\

# Cross-compiling (e.g., on Mac OS X)
TOOLPREFIX = i386-jos-elf-

# Using native tools (e.g., on X86 Linux)
#TOOLPREFIX = 

CC = $(TOOLPREFIX)gcc
AS = $(TOOLPREFIX)gas
LD = $(TOOLPREFIX)ld
OBJCOPY = $(TOOLPREFIX)objcopy
OBJDUMP = $(TOOLPREFIX)objdump
CFLAGS = -fno-builtin -O2 -Wall -MD -ggdb
CFLAGS += $(shell $(CC) -fno-stack-protector -E -x c /dev/null >/dev/null 2>&1 && echo -fno-stack-protector)

xv6.img: bootblock kernel fs.img
	dd if=/dev/zero of=xv6.img count=10000
	dd if=bootblock of=xv6.img conv=notrunc
	dd if=kernel of=xv6.img seek=1 conv=notrunc

bootblock: bootasm.S bootmain.c
	$(CC) -O -nostdinc -I. -c bootmain.c
	$(CC) -nostdinc -I. -c bootasm.S
	$(LD) -N -e start -Ttext 0x7C00 -o bootblock.o bootasm.o bootmain.o
	$(OBJDUMP) -S bootblock.o > bootblock.asm
	$(OBJCOPY) -S -O binary bootblock.o bootblock
	./sign.pl bootblock

bootother: bootother.S
	$(CC) -nostdinc -I. -c $*.S
	$(LD) -N -e start -Ttext 0x7000 -o bootother.out bootother.o
	$(OBJCOPY) -S -O binary bootother.out bootother
	$(OBJDUMP) -S bootother.o > bootother.asm

initcode: initcode.S
	$(CC) -nostdinc -I. -c $*.S
	$(LD) -N -e start -Ttext 0 -o initcode.out initcode.o
	$(OBJCOPY) -S -O binary initcode.out initcode
	$(OBJDUMP) -S initcode.o > initcode.asm

kernel: $(OBJS) bootother initcode
	$(LD) -Ttext 0x100000 -e main -o kernel $(OBJS) -b binary initcode bootother
	$(OBJDUMP) -S kernel > kernel.asm
	$(OBJDUMP) -t kernel | sed '1,/SYMBOL TABLE/d; s/ .* //' > kernel.sym

tags: $(OBJS) bootother.S _init
	etags *.S *.c

vectors.S: vectors.pl
	perl vectors.pl > vectors.S

ULIB = ulib.o usys.o printf.o umalloc.o

_%: %.o $(ULIB)
	$(LD) -N -e main -Ttext 0 -o $@ $^
	$(OBJDUMP) -S $@ > $*.asm
	$(OBJDUMP) -t $@ | sed '1,/SYMBOL TABLE/d; s/ .* //' > $*.sym

_forktest: forktest.o $(ULIB)
	# forktest has less library code linked in - needs to be small
	# in order to be able to max out the proc table.
	$(LD) -N -e main -Ttext 0 -o _forktest forktest.o ulib.o usys.o
	$(OBJDUMP) -S _forktest > forktest.asm

mkfs: mkfs.c fs.h
	gcc -Wall -o mkfs mkfs.c

UPROGS=\
	_cat\
	_echo\
	_forktest\
	_grep\
	_init\
	_kill\
	_ln\
	_ls\
	_mkdir\
	_rm\
	_sh\
	_usertests\
	_wc\
	_zombie\

fs.img: mkfs README $(UPROGS)
	./mkfs fs.img README $(UPROGS)

-include *.d

clean: 
	rm -f *.ps *.tex *.dvi *.idx *.aux *.log *.ind *.ilg \
	*.o *.d *.asm *.sym vectors.S parport.out \
	bootblock kernel xv6.img fs.img mkfs \
	$(UPROGS)

# make a printout
PRINT =	\
	runoff.list \
	README\
	types.h param.h defs.h x86.h asm.h elf.h mmu.h spinlock.h\
	bootasm.S bootother.S main.c init.c spinlock.c\
	proc.h proc.c setjmp.S kalloc.c\
	syscall.h trapasm.S traps.h trap.c vectors.pl syscall.c sysproc.c\
	buf.h dev.h fcntl.h stat.h file.h fs.h fsvar.h file.c fs.c bio.c ide.c sysfile.c\
	pipe.c exec.c\
	mp.h ioapic.h mp.c lapic.c ioapic.c picirq.c\
	console.c\
	string.c\

xv6.pdf: $(PRINT)
	./runoff

print: xv6.pdf

# run in emulators

bochs : fs.img xv6.img
	if [ ! -e .bochsrc ]; then ln -s dot-bochsrc .bochsrc; fi
	bochs -q

qemu: fs.img xv6.img
	qemu -parallel stdio -hdb fs.img xv6.img

# CUT HERE
# prepare dist for students
# after running make dist, probably want to
# rename it to rev0 or rev1 or so on and then
# check in that version.
dist:
	rm -rf dist
	mkdir dist
	for i in *.c *.h *.S; \
	do \
		grep -v PAGEBREAK $$i >dist/$$i; \
	done
	sed '/CUT HERE/,$$d' Makefile >dist/Makefile
	cp README dot-bochsrc *.pl toc.* runoff runoff1 runoff.list dist

dist-test:
	rm -rf dist-test
	mkdir dist-test
	cp dist/* dist-test
	cd dist-test; ../m print
	cd dist-test; ../m bochs || true
	cd dist-test; ../m qemu

# update this rule (change rev1) when it is time to
# make a new revision.
tar:
	rm -rf /tmp/xv6
	mkdir -p /tmp/xv6
	cp dist/* /tmp/xv6
	(cd /tmp; tar cf - xv6) | gzip >xv6-rev1.tar.gz