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21 May, 03:28

When an IRET instruction is executed, what actiontakes place?

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  1. 21 May, 04:14
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    IRET is used for return from interrupt handler

    Explanation:

    During interrupt processing (e. g., mouse-click or keyboard key press), the control transfers to interrupt service routine. Once the interrupt processing is over, control needs to be transferred back to the interrupted user code. IRET is the instruction used in x86 instruction set architecture to accomplish this functionality. Upon IRET instruction processing, the execution stack is also restored to the position prior to the invocation of the interrupt service routine.
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