export LD?=ld
export OBJCOPY?=objcopy
export PARTED?=parted
export QEMU?=qemu-system-x86_64

all: $(BUILD)/bootloader.bin

$(BUILD)/libbootloader.a: $(SOURCE)/Cargo.toml $(SOURCE)/Cargo.lock $(shell find $(SOURCE)/src -type f)
	mkdir -p "$(BUILD)"
	env RUSTFLAGS="--cfg aes_force_soft -Zunstable-options" \
	cargo rustc \
		--manifest-path="$<" \
		$(CARGO_ARGS) \
		--lib \
		-- \
		--emit link="$@"

$(BUILD)/libbootloader-live.a: $(SOURCE)/Cargo.toml $(SOURCE)/Cargo.lock $(shell find $(SOURCE)/src -type f)
	mkdir -p "$(BUILD)"
	env RUSTFLAGS="--cfg aes_force_soft -Zunstable-options" \
	cargo rustc \
		--manifest-path="$<" \
		$(CARGO_ARGS) \
		--lib \
		--features live \
		-- \
		--emit link="$@"

$(BUILD)/%.elf: $(BUILD)/lib%.a $(SOURCE)/linkers/$(TARGET).ld
	$(LD) -m elf_i386 --gc-sections -z max-page-size=0x1000 -T "$(SOURCE)/linkers/$(TARGET).ld" -o "$@" "$<"
	$(OBJCOPY) --only-keep-debug "$@" "$@.sym"
	$(OBJCOPY) --strip-debug "$@"

$(BUILD)/%.bin: $(BUILD)/%.elf $(shell find $(SOURCE)/asm/$(TARGET) -type f)
	nasm -f bin -o "$@" -l "$@.lst" -D STAGE3="$<" -i"$(SOURCE)/asm/$(TARGET)/" "$(SOURCE)/asm/$(TARGET)/bootloader.asm"

$(BUILD)/harddrive.bin: $(BUILD)/bootloader.bin $(BUILD)/filesystem.bin
	rm -f "$@.partial"
	fallocate -l 256MiB "$@.partial"
	$(PARTED) -s -a minimal "$@.partial" mklabel msdos
	$(PARTED) -s -a minimal "$@.partial" mkpart primary 2MiB 100%
	dd if="$<" of="$@.partial" bs=1 count=446 conv=notrunc
	dd if="$<" of="$@.partial" bs=512 skip=1 seek=1 conv=notrunc
	dd if="$(BUILD)/filesystem.bin" of="$@.partial" bs=1MiB seek=2 conv=notrunc
	mv "$@.partial" "$@"

qemu: $(BUILD)/harddrive.bin
	$(QEMU) \
		-d cpu_reset \
		-no-reboot \
		-smp 4 -m 2048 \
		-chardev stdio,id=debug,signal=off,mux=on \
		-serial chardev:debug \
		-mon chardev=debug \
		-machine q35 \
		-net none \
		-enable-kvm \
		-cpu host \
		-drive file="$<",format=raw