程序中的信号处理程序捕获到函数的执行被某个信号中断,信号处理程序然后按正常方式返回。
EINTR — the function was interrupted by a signal, which was caught by a signal handler in the program, and the signal handler returned normally.
内核从中断返回,并且应用程序的上面的浮点寄存器之一被破坏。
Kernel returns from interrupt, and one of the application's upper floating-point registers is destroyed.
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