interrupt-handling

问题 I am trying to configure a GPIO interrupt in the uboot, This it to test the Interrupt response time without any OS intervention (Bare-metal). I was able to configure the pin-muxing and also successful in setting up the interrupt with the GPIO pin. My question is regarding the registering of the interrupt service routine. I see that the Interrupt vector table for my platform is at address 0xFFFF0000 ( I read the System Control Register to find out this). The interrupt Id for the GPIO was 56

问题 Curious what the processor/CPU does in general or let say, on intel cpu & Linux, when it executes a division by zero instruction. Also how the error is relayed to the application, so that it can log the error or notify the developer? Thank you! 回答1: To answer in general terms, rather than going into gory details for Linux on x86_64, which are likely to obscure the concepts. CPUs tend to throw an exception interrupt, on things like division by zero, or dereferencing a NULL pointer. These

问题 I can detect that the iPhone went to sleep and came back from sleep, by using the applicationWillResignActive and applicationDidBecomeActive. But how do I find out what kind of interrupt it was. I am making an audio player application, and need to keep the audio playing when the iPhone goes to sleep (which I know how to do). But I need to interrupt the audio when a message, alarm or low battery interrupt occurs. Also I need to resume the audio when the event is over. So how do I differentiate

问题 Is there any way to make a program that cannot be interrupted (an uninterrupted program)? By that, I mean a process that can't be terminated by any signal, kill command, or any other key combinations in any System: Linux, windows etc. First, I am interested to know whether it's possible or not. And if yes, upto what extend it is possible? I mostly write code in C, C++, and python; but I don't know any of such command(s) available in these programming languages. Is it possible with assembly