brsl代表“branch relative and setlink”，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。
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.
路径是程序从入口到退出的指令顺序。
A path is an instruction sequence that threads through the program from entry to final exit.
这个编译指令抑制入口代码的产生，有益于内嵌汇编函数。
This pragma suppresses the generation of entry code and is useful for inline assembler functions.
这个编译指令抑制入口代码的产生，有益于内嵌汇编函数。
This pragma suppresses the generation of entry code and is useful for inline assembler functions.
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