new OS

Makefile

@@ -0,0 +1,35 @@
+AS = nasm
+CC = gcc
+LD = ld
+QEMU = qemu-system-i386
+IMG_SIZE = 1440k
+
+BOOT_SRC = bootloader/boot.asm
+BOOT_BIN = build/boot.bin
+BOOT_IMG = build/boot.img
+KERNEL_SRC = kernel/kmain.c
+KERNEL_BIN = build/kernel.bin
+DISK_IMG = build/disk.img
+
+all: $(BOOT_IMG) $(KERNEL_BIN) $(DISK_IMG)
+
+$(BOOT_BIN): $(BOOT_SRC)
+	$(AS) -f bin -o $@ $<
+
+$(BOOT_IMG): $(BOOT_BIN)
+	cp $(BOOT_BIN) $@
+	truncate -s $(IMG_SIZE) $@
+
+$(KERNEL_BIN): $(KERNEL_SRC)
+	$(CC) -ffreestanding -c $< -o build/kernel.o
+	$(LD) -T bootloader/linker.ld -o $@ build/kernel.o
+
+$(DISK_IMG): $(BOOT_IMG) $(KERNEL_BIN)
+	dd if=$(BOOT_IMG) of=$@ bs=512 seek=4
+	dd if=$(KERNEL_BIN) of=$@ bs=512 seek=200
+
+run: $(DISK_IMG)
+	$(QEMU) -drive file=$<,format=raw,if=floppy
+
+clean:
+	rm -rf build