kgccargs = -Wall -Wsuggest-attribute=pure -Wsuggest-attribute=const -Wsuggest-attribute=malloc -m32 -Og -ffreestanding -fno-asynchronous-unwind-tables
ugccargs = ${kgccargs} -Isrc/user/include
nasmargs = -f elf32
partlink = -r -m elf_i386

out/disk.vdi: out/disk.img
	VBoxManage convertfromraw out/disk.img out/disk.vdi --uuid a61929ed-3bf2-45ff-b98a-44f87c616dba

out/disk.img: out/kernel.bin out/boot.bin out/fs
	mkdir -p obj
	/sbin/mkfs.fat -C -f 1 -F 16 -n "PORTLAND OS" -R 65 -s 1 -S 512 obj/shadow.img 8192
	echo -n -e '\xeb\x3c' > obj/jmp.bin
	dd if=obj/jmp.bin of=obj/shadow.img obs=2 conv=notrunc
	dd if=out/boot.bin of=obj/shadow.img obs=1 seek=62 conv=notrunc
	dd if=out/kernel.bin of=obj/shadow.img seek=1 conv=notrunc
	mv obj/shadow.img out/disk.img
	mcopy -i out/disk.img -s out/fs/* ::/

debug: out/disk.img
	gdb -x qemu-debug.gdb

clean:
	rm -r obj out || true

out/fs: obj/hello.elf obj/init.elf obj/meminfo.elf
	mkdir -p out/fs/bin 
	cp -r fs-skel/* out/fs/
	objcopy -S obj/hello.elf    out/fs/bin/hello.elf
	objcopy -S obj/init.elf     out/fs/bin/init.elf
	objcopy -S obj/meminfo.elf  out/fs/bin/meminfo.elf

obj/kernel/%.ko: src/kernel/%.c
	mkdir -p $(shell dirname $@)
	gcc ${kgccargs} -c $< -o $@

obj/kernel/%.kao: src/kernel/%.asm
	mkdir -p $(shell dirname $@)
	nasm ${nasmargs} $< -o $@

out/kernel.bin: obj/kernel/drive.ko  obj/kernel/fat.ko   obj/kernel/ide.ko    \
                obj/kernel/idt.ko    obj/kernel/log.ko   obj/kernel/main.ko   \
                obj/kernel/main2.ko  obj/kernel/pmap.ko  obj/kernel/paging.ko \
                obj/kernel/panic.ko  obj/kernel/pci.ko   obj/kernel/elf.ko    \
                obj/kernel/serial.ko obj/kernel/task.ko  obj/kernel/util.ko   \
                obj/kernel/vga.ko    obj/kernel/isrs.kao
	mkdir -p out
	ld -T src/kernel/elf-link.ld obj/kernel/* -o obj/kernel.elf
	objcopy -O binary obj/kernel.elf out/kernel.bin

out/boot.bin: src/boot.asm
	mkdir -p out
	nasm src/boot.asm -o out/boot.bin

obj/%.o: src/user/%.c
	mkdir -p $(shell dirname $@)
	gcc ${ugccargs} -c $< -o $@

obj/%.ao: src/user/%.asm
	mkdir -p $(shell dirname $@)
	nasm ${nasmargs} $< -o $@

obj/knob.so: obj/knob/env.o  obj/knob/file.o obj/knob/format.o \
             obj/knob/heap.o obj/knob/quit.o obj/knob/user.o   \
             obj/knob/task.o obj/knob/entry.ao
	ld ${partlink} obj/knob/* -o obj/knob.so

obj/hello.elf: obj/hello/hello.o obj/knob.so
	ld -T src/user/elf.ld obj/hello/* obj/knob.so -o obj/hello.elf

obj/init.elf: obj/init/init.o obj/knob.so
	ld -T src/user/elf.ld obj/init/* obj/knob.so -o obj/init.elf

obj/meminfo.elf: obj/meminfo/meminfo.o obj/knob.so
	ld -T src/user/elf.ld obj/meminfo/* obj/knob.so -o obj/meminfo.elf