busybox安装

mount -o remount,rw -t yaffs2 /dev/block/mtdblock3 /system

报错:mount: '/system' not in /proc/mounts

adb push busybox /data/local/tmp
adb shell
su root
cd /data/local/tmp
mount -o rw,remount -t auto /system
cp /data/local/tmp/busybox /system/xbin
cd  /system/xbin
chmod 777 busybox
busybox --install ./

busybox下载链接
https://busybox.net/downloads/binaries/1.31.0-defconfig-multiarch-musl/