This indicates that the function's address will be the address of the nextinstruction.
这表明函数地址将是下一个指令的地址。
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A program references storage using the effective address computed by the processor when it executes a storage Access or Branch instruction or when it fetches the next sequential instruction.
BRSL stands for "branch relative and set link." This branches to the function entry point and sets the link register (LR) to the nextinstruction 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。