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- sudo apt install build-essential
- sudo apt install qemu
- sudo apt install libncurses5-dev bison flex libssl-dev libelf-dev
2.下载内核源码
- sudo apt install axel
- axel -n 20 https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/linux-5.4.34.tar.xz
- xz -d linux-5.4.34.tar.xz
- tar -xvf linux-5.4.34.tar
- cd linux-5.4.34
3.配置内核选项
- Kernel hacking --->
- Compile-time checks and compiler options --->
- [*] Compile the kernel with debug info
- [*] Provide GDB scripts for kernel debugging
- [*] Kernel debugging
- Processor type and features ---->
- [] Randomize the address of the kernel image (KASLR)
4.制作根文件系统
首先从https://www.busybox.net下载 busybox源代码解压,解压完成后,跟内核一样先配置编译,并安装。
- axel -n 20 https://busybox.net/downloads/busybox-1.31.1.tar.bz2
- tar -jxvf busybox-1.31.1.tar.bz2
- cd busybox-1.31.1
- make menuconfig
- #记得要编译成静态链接,不用动态链接库。
- Settings --->
- [*] Build static binary (no shared libs)
- #然后编译安装,默认会安装到源码目录下的 _install 目录中。
- make -j$(nproc) && make install
- mkdir rootfs
- cd rootfs
- cp ../busybox-1.31.1/_install/* ./ -rf
- mkdir dev proc sys home
- sudo cp -a /dev/{null,console,tty,tty1,tty2,tty3,tty4} dev/
-
- find . -print0 | cpio --null -ov --format=newc | gzip -9 > ../rootfs.cpio.gz
- qemu-system-x86_64 -kernel linux-5.4.34/arch/x86/boot/bzImage -initrd rootfs.cpio.gz
5、在.vscode中添加配置文件
6、跟踪Linux内核的启动过程
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