-AS = yasm # choose yasm or nasm here
-ASFLAGS = -f bin # compile a raw binary
+AS = yasm
+LD = i686-elf-ld
+CC = i686-elf-gcc
-boot: boot.s print.s
- $(AS) $(ASFLAGS) -o $@ boot.s
+all: boot.img
-clean:
- -rm boot
+boot.img: boot kernel/kernel.bin
+ cat boot kernel/kernel.bin > $@
+ truncate -s1440K $@
+
+boot: boot.s
+ $(AS) -f bin boot.s -o $@
+
+kernel/kernel.bin: kernel/entry.o kernel/kernel.o
+ $(LD) -o $@ -Ttext 0x1000 kernel/entry.o kernel/kernel.o --oformat=binary
-run:
- qemu-system-i386 boot
+kernel/entry.o: kernel/entry.s
+ $(AS) -f elf kernel/entry.s -o $@
-help:
- @echo "Run 'make' to compile."
- @echo "Run 'make clean' to delete compiled objects."
- @echo "Run 'make run' to run the compiled object. Must have qemu-system-i386 (but x86_64 should work too)."
+kernel/kernel.o: kernel/kernel.c
+ $(CC) -o $@ -ffreestanding -c kernel/kernel.c
+
+clean:
+ rm boot kernel/kernel.bin kernel/entry.o kernel/kernel.o boot.img
-.PHONY = clean run help
+.PHONY: all clean