Search results
Results from the WOW.Com Content Network
As the address pushed to the stack is that of the aborted instruction rather than the contents of the program counter, executing an RTI (ReTurn from Interrupt) following an ABORT interrupt will cause the processor to return to the aborted instruction, rather than the next instruction, as would be the case with the other interrupts.
With the new PC, the processor jumps to the service routine for the interrupting device. That routine operates the device, at least removing the condition that caused the interrupt. The routine ends with the RTI (ReTurn from Interrupt) instruction, which restores PC and PSW as of just before the processor granted the interrupt.
A hardware interrupt is a condition related to the state of the hardware that may be signaled by an external hardware device, e.g., an interrupt request (IRQ) line on a PC, or detected by devices embedded in processor logic (e.g., the CPU timer in IBM System/370), to communicate that the device needs attention from the operating system (OS) [7] or, if there is no OS, from the bare metal ...
In the C Standard Library, signal processing defines how a program handles various signals while it executes. A signal can report some exceptional behavior within the program (such as division by zero), or a signal can report some asynchronous event outside the program (such as someone striking an interactive attention key on a keyboard).
Interrupt handlers are initiated by hardware interrupts, software interrupt instructions, or software exceptions, and are used for implementing device drivers or transitions between protected modes of operation, such as system calls. The traditional form of interrupt handler is the hardware interrupt handler.
If at that point entry (tail−1) is free (cleared), an interrupt will be generated (level interrupt) and the tail pointer will be incremented. If the hardware requires the interrupt be acknowledged, the CPU (interrupt handler) will do that, handle the valid DMA descriptors at the head, and return from the interrupt.
In a computer, an interrupt request (or IRQ) is a hardware signal sent to the processor that temporarily stops a running program and allows a special program, an interrupt handler, to run instead. Hardware interrupts are used to handle events such as receiving data from a modem or network card , key presses, or mouse movements.
The SIGINT signal is sent to a process by its controlling terminal when a user wishes to interrupt the process. This is typically initiated by pressing Ctrl+C, but on some systems, the "delete" character or "break" key can be used. [13] SIGKILL The SIGKILL signal is sent to a process to cause it to terminate immediately (kill). In contrast to ...