Organizing the kernel code.

Makefile

@@ -1,38 +1,33 @@
 ASM=nasm
-AFLAGS=-f bin
 BIN=bin
 CFLAGS=-ffreestanding -fno-pie -m32
 CC=gcc
 LD=ld
 LDFLAGS=-melf_i386 -Ttext 0x1000 --oformat binary
 
+OBJ=kernel/kernel_entry.o kernel/kernel.o
+
 all: os-image
 
-os-image: boot_sect.bin kernel.bin
+os-image: boot/boot_sect.bin kernel.bin
 	mkdir -p $(BIN)
 	cat $^ > $(BIN)/$@
 
 # build kernel binary file
-kernel.bin: kernel_entry.o kernel.o
+kernel.bin: $(OBJ)
 	$(LD) $(LDFLAGS) $^ -o $@
 
-# build kernel object file
-kernel.o: kernel.c
+%.o: %.c ${HEADERS}
 	$(CC) $(CFLAGS) -c $< -o $@
 
-# build kernel entry object file
-kernel_entry.o: kernel_entry.asm
-	$(ASM) -f elf $< -o $@
-
-boot_sect.bin: boot_sect.asm
-	$(ASM) $< $(AFLAGS) -o $@
-
-basicos: boot_sect.bin kernel.bin
-	mkdir -p $(BIN)
-	cat boot_sect.bin kernel.bin > $(BIN)/os-image
+%.o: %.asm
+	$(ASM) $< -f elf -o $@
 
+%.bin: %.asm
+	$(ASM) $< -f bin -I 'boot/' -o $@
 
 .PHONY: clean
 
 clean:
-	rm -f *.bin *.o
+	rm -rf boot/*.bin boot/*.o
+	rm -rf kernel/*.o boot/*.o drivers/*.o