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- # Compiler settings
- CC = x86_64-elf-gcc
- CFLAGS = -m32 -nostdlib -nostdinc -fno-builtin -fno-stack-protector -nostartfiles -nodefaultlibs -Wall -Wextra -c
- ASM = nasm
- ASMFLAGS = -f elf32
- LD = x86_64-elf-ld
- LDFLAGS = -T src/kernel/linker.ld -m elf_i386
- OBJCOPY = x86_64-elf-objcopy
- # Directories
- SRC_DIR = src
- BUILD_DIR = build
- # Files
- BOOT_SRC = $(SRC_DIR)/boot/boot.asm
- KERNEL_ENTRY = $(SRC_DIR)/kernel/entry.asm
- KERNEL_SRC = $(SRC_DIR)/kernel/kernel.c
- BOOT_BIN = $(BUILD_DIR)/boot.bin
- KERNEL_OBJ = $(BUILD_DIR)/kernel.o
- ENTRY_OBJ = $(BUILD_DIR)/entry.o
- KERNEL_BIN = $(BUILD_DIR)/kernel.bin
- KERNEL_ELF = $(BUILD_DIR)/kernel.elf
- OS_IMAGE = $(BUILD_DIR)/nox-os.img
- # Build rules
- all: $(OS_IMAGE)
- $(BOOT_BIN): $(BOOT_SRC)
- $(ASM) -f bin $< -o $@
- $(ENTRY_OBJ): $(KERNEL_ENTRY)
- $(ASM) $(ASMFLAGS) $< -o $@
- $(KERNEL_OBJ): $(KERNEL_SRC)
- $(CC) $(CFLAGS) $< -o $@
- $(KERNEL_ELF): $(ENTRY_OBJ) $(KERNEL_OBJ)
- $(LD) $(LDFLAGS) -o $@ $^
- $(KERNEL_BIN): $(KERNEL_ELF)
- $(OBJCOPY) -O binary $^ $@
- $(OS_IMAGE): $(BOOT_BIN) $(KERNEL_BIN)
- dd if=/dev/zero of=$@ bs=512 count=2880
- dd if=$(BOOT_BIN) of=$@ conv=notrunc
- # Ensure the kernel is properly aligned at sector 2
- dd if=$(KERNEL_BIN) of=$(OS_IMAGE) seek=1 conv=notrunc bs=512
- run: $(OS_IMAGE)
- qemu-system-i386 -fda $(OS_IMAGE) -boot a -monitor stdio -d int -no-reboot
- clean:
- rm -rf $(BUILD_DIR)/*
- mkdir -p $(BUILD_DIR)
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