compile and run

Makefile

@@ -0,0 +1,22 @@
+export BASE_DIR=$(shell pwd)
+export TARGET_ISO=HelloOS.iso
+export CONFIG_x86_64=y
+export CC=gcc
+export AS=as
+export HIDE=@
+ifneq ($(HIDE),)
+	MAKEFLAGS += --no-print-dirctory
+endif
+
+
+HelloOS:
+	$(HIDE)make -C arch
+
+clean:
+	$(HIDE)make -C arch clean
+
+cleanall:
+	$(HIDE)make -C arch cleanall
+
+run:
+	qemu-system-x86_64 -m 1G -cdrom arch/$(TARGET_ISO) -nographic

arch/Makefile

@@ -0,0 +1,34 @@
+kernel_target=kernel.elf
+SRCS = $(BASE_DIR)/init $(BASE_DIR)/kernel $(BASE_DIR)/mm
+ifeq ($(CONFIG_x86_64), y)
+	SRCS += $(BASE_DIR)/arch/x86
+	lds = $(BASE_DIR)/arch/x86/boot/vmlinux.lds
+else
+	$(HIDE)echo "unkown arch..."
+endif
+
+$(TARGET_ISO): $(kernel_target)
+	$(HIDE)rm -rf build_dir
+	$(HIDE)mkdir -p build_dir/boot/grub
+	$(HIDE)cp $(kernel_target) build_dir/boot
+
+	$(HIDE)echo 'set timeout=0' > build_dir/boot/grub/grub.cfg
+	$(HIDE)echo 'set default=0' >> build_dir/boot/grub/grub.cfg
+	$(HIDE)echo 'menuentry "HelloOS" {' >> build_dir/boot/grub/grub.cfg
+	$(HIDE)echo '	multiboot2 /boot/kernel.elf "HelloOS"' >> build_dir/boot/grub/grub.cfg
+	$(HIDE)echo '}' >> build_dir/boot/grub/grub.cfg
+
+	$(HIDE)grub-mkrescue -o $(TARGET_ISO) build_dir
+	$(HIDE)rm -rf build_dir
+
+$(kernel_target):
+	$(HIDE)for dir in $(SRCS); do \
+		make -C $$dir || exit 1; \
+	done
+	$(HIDE)ld -b elf64-x86-64 -z muldefs -o $(kernel_target) -Map=./kernel.map -T $(lds) $(shell find $(SRCS) -name "*.o") 
+
+clean:
+	$(HIDE)rm -rf $(kernel_target) $(TARGET_ISO) kernel.map
+
+cleanall: clean
+	$(HIDE)rm -rf $(kernel_target) $(TARGET_ISO)

arch/x86/Makefile

@@ -0,0 +1,9 @@
+export ASFLAGS=--64
+export CFLAGS = -I$(BASE_DIR)/include --static -fno-pie -fno-builtin -fno-stack-protector -m64
+
+x86_srcs = boot kernel
+
+build:
+	$(HIDE)for dir in $(x86_srcs); do \
+		make -C $$dir || exit 1; \
+	done

arch/x86/boot/Makefile

@@ -0,0 +1,6 @@
+
+build: header.o
+
+header.o: header.S
+	$(HIDE)$(CC) -E  $(CFLAGS) $< > header.i
+	$(HIDE)$(AS) $(ASFLAGS) -o $@ header.i

arch/x86/kernel/Makefile

@@ -0,0 +1,4 @@
+
+head_64.o: head_64.S
+	$(HIDE)$(CC) -E  $(CFLAGS) $< > head_64.i
+	$(HIDE)$(AS) $(ASFLAGS) -o $@ head_64.i

init/Makefile

@@ -0,0 +1,3 @@
+
+build:
+	echo "init"

kernel/Makefile

@@ -0,0 +1,4 @@
+
+build:
+	echo $(baseDir)
+

mm/Makefile

@@ -0,0 +1,3 @@
+
+build:
+	echo "mm"