The "System" branch is used to store miscellaneous, but essential, authentication entry information.
“System”分支用于存储其他(但必需)的身份验证条目信息。
3
BRSL stands for "branch relative and set link." This branches to the function entry point and sets the link register (LR) to the next instruction for the return address.
brsl代表“branch relative and set link”，用来分支到函数的入口点并将链接寄存器(LR)设置为返回地址的下一个指令。