根据各种参考文献，我对signals in Linux is "The triggers that are used to notify the processes about an occurrence of a specific event.Event here may refer to a software exception.Additionally signals may also be used for IPC mechanisms."个问题的主观定义如下:
- 我认为只有例外情况(软件中断)通过信号通知.那么硬件中断的情况呢.
- 信号的各种来源是什么？在我看来，内核总是信号的来源.(用于IPC时除外)
- 信号处理器和ISR之间的区别？.
- 信号屏蔽和中断屏蔽之间的区别？