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shug的笔记集合

配置QEMU开发环境

问题修复

如果已经安装了ncurses库, 还是提示安装ncurses库, 修改类似kconfig/lxdialog/check-lxdialog.c的文件

int main() {}

改为

int main() { return 0; }

编译内核

下载地址

编译x86_64的内核

Terminal window
make x86_64_defconfig
make

编译busybox的文件系统

下载地址

勾选编译成静态文件

Terminal window
make menuconfig
make
make install

如果安装了ncurses库，还是提示错误，修改scripts/kconfig/lxdialog/Makefile注释always := $(hostprogs-y) dochecklxdialog

如果networking/tc.c编译报错，将networking/tc.c移出/networking目录

配置网络

Terminal window
sudo ip link add name br0 type bridge
sudo ip link set dev br0 up
sudo ip addr add 192.168.1.1/24 dev br0

安装nfs

Terminal window
apt install nfs-kernel-server

修改nfs配置文件

/nfsroot *(rw,sync,no_subtree_check,no_root_squash)

重新加载nfs配置

Terminal window
sudo exportfs -a
sudo systemctl restart nfs-kernel-server

修改busybox的配置

创建目录

Terminal window
mkdir etc dev mnt proc tmp sys
mkdir -p etc/init.d/
::sysinit:/etc/init.d/rcS
::respawn:-/bin/sh
::askfirst:-/bin/sh
::shutdown:/bin/umount -a -r
/bin/mount -a
mount -o remount,rw /
mkdir -p /dev/pts
mount -t devpts devpts /dev/pts
echo /sbin/mdev > /proc/sys/kernel/hotplug
mdev -s
proc  /proc proc  defaults 0 0
tmpfs  /tmp  tmpfs  defaults 0 0
none  /tmp  ramfs defaults 0 0
sysfs /sys  sysfs defaults 0 0
mdev  /dev  ramfs defaults 0 0
Terminal window
mknod /nfsroot/dev/console c 5 1
mknod /nfsroot/dev/null c 1 3
mknod /nfsroot/dev/tty1 c 4 1
chmod +x /nfsroot/etc/inittab
chmod +x /nfsroot/etc/init.d/rcS

启动QEMU

允许连接网桥

allow br0
Terminal window
qemu-system-x86_64 \
 -kernel ./arch/x86/boot/bzImage  \
 -append "root=/dev/nfs nfsroot=192.168.1.1:/nfsroot,vers=3,intr,nolock,rsize=1024,wsize=1024,tcp ip=192.168.1.10::192.168.1.1:255.255.255.0:clienthostname:eth0:off rw init=/linuxrc console=tty0 console=ttyS0"  \
 --nographic -netdev bridge,id=net0,br=br0 -device e1000,netdev=net0

创建resolv.conf配置文件

nameserver 1.1.1.1

内核的起始位置

x86_64架构下, 0x100200