ttyos/Makefile at main · gaidardzhiev/ttyos · GitHub

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CC=gcc
CFLAGS=-Wall -Wextra -ffreestanding -nostdlib -fno-builtin -fno-stack-protector -O2 -Iinclude -Iinclude/asm-x86_64
SYSCALL_CFLAGS=$(CFLAGS) -mgeneral-regs-only
NASM=nasm
NASMFLAGS_BIN=-f bin -w+all
NASMFLAGS_ELF64 = -f elf64 -w+all
LD = ld
LDFLAGS = -T linker.ld -nostdlib
DIRS = arch/x86_64 kernel mm init drivers fs lib
C_SRCS = $(foreach dir,$(DIRS),$(wildcard $(dir)/*.c))
ASM_SRCS_BIN = boot/boot.S
ASM_SRCS_NASM = arch/x86_64/interrupts.S arch/x86_64/startup.S arch/x86_64/isr.S kernel/context_switch.S
C_OBJS = $(C_SRCS:.c=.o)
ASM_OBJS_BIN = $(ASM_SRCS_BIN:.S=.bin)
ASM_OBJS_NASM = $(ASM_SRCS_NASM:.S=.o)

.PHONY: all clean iso run

all: boot.bin kernel.bin

boot.bin: boot/boot.S
	$(NASM) $(NASMFLAGS_BIN) -o $@ $<

%.o: %.S
	@if echo $< | grep -q -E "^(boot/boot.S)"; then \
		$(NASM) $(NASMFLAGS_BIN) -o $@ $<; \
	else \
		$(NASM) $(NASMFLAGS_ELF64) -o $@ $<; \
	fi

kernel/syscall.o: kernel/syscall.c
	$(CC) $(SYSCALL_CFLAGS) -c $< -o $@

%.o: %.c
	$(CC) $(CFLAGS) -c $< -o $@

kernel.bin: $(C_OBJS) $(ASM_OBJS_NASM)
	$(LD) $(LDFLAGS) -o $@ $^

iso: all
	rm -rf iso
	mkdir -p iso/boot/grub
	cp kernel.bin iso/boot/kernel.bin
	cp boot.bin iso/boot/boot.bin
	echo 'set timeout=1' > iso/boot/grub/grub.cfg
	echo 'set default=0' >> iso/boot/grub/grub.cfg
	echo 'menuentry "Simple Kernel" {' >> iso/boot/grub/grub.cfg
	echo '  multiboot2 /boot.bin' >> iso/boot/grub/grub.cfg
	echo '  boot' >> iso/boot/grub/grub.cfg
	echo '}' >> iso/boot/grub/grub.cfg
	grub-mkrescue -o test_os.iso iso

clean:
	rm -f $(C_OBJS) $(ASM_OBJS_NASM) boot.bin kernel.bin
	rm -rf iso test_os.iso

run: iso
	qemu-system-x86_64 -cdrom test_os.iso -m 512M -serial stdio