MIT6.828lab 环境配置 代码框架:git clone https://pdos.csail.mit.edu/6.828/2018/jos.git lab 编译工具:gcc/g++ -m32 -print-libgcc-file-name 下载QEMU模拟器:git clone https://github.com/mit-pdos/6.828-qemu.git qemu