Important registers to look for when debugging through signals are the GPRs, instruction pointer (NIP), machine state register (MSR), trap, data address register (DAR), and so on.
在调试信号时，需要查看的一些重要寄存器包括GPR、指令指针(NIP)、机器状态寄存器(MSR)、Trap、数据地址寄存器(DAR)等等。
Upon returning from the called function, execution will resume at the saved return-instruction pointer as specified.
从调用函数处返回指针后，将在指定的返回指令指针处恢复执行。
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