🔧 修改为makefile的构建方式，程序能正常运行

kernel/Makefile

@@ -0,0 +1,19 @@
+
+all: kernel
+	objcopy -I elf64-x86-64 -S -R  ".eh_frame" -R ".comment" -O binary kernel ../bin/kernel/kernel.bin
+
+
+kernel: head.o main.o
+	ld -b elf64-x86-64 -o kernel head.o main.o -T link.lds
+
+main.o: main.c
+# -fno-builtin: 不使用C语言内建函数
+# The -m64 option sets int to 32bits and long and pointer to 64 bits and generates code for AMD’s x86-64 architecture.
+	gcc -mcmodel=large -fno-builtin -m64 -c main.c
+
+head.o: head.S
+	gcc -E head.S > head.s # 预处理
+	as --64 -o head.o head.s
+
+clean:
+	rm -rf *.o *.s~ *.s *.S~ *.c~ *.h~ kernel