Name — To register and control the active state of the user exit.

名称——注册和控制用户出口的活动状态。

youdao

Since you did not call any functions or use any local storage, you did not need a stack frame at all, so you can now just exit through the link register.

由于未调用任何函数，也未使用任何本地存储，所以您根本无需堆栈框架，并可通过链接寄存器退出。

youdao

You can be an entrance elf, a water cooler elf, a bridge elf, train elf, maze elf, island elf, magic window elf, usher elf, cash register elf or exit elf.

NPR: Crumpet the Elf Reads from Santaland Diaries