It sends a signal back to the hardware (often through an Interrupt Controller) saying, "Message received, you can stop signaling now."
This is the generic term for this technology. It works like a Memory Management Unit (MMU) for I/O devices. Just as an MMU translates the virtual addresses used by software into the physical addresses in RAM, the IOMMU translates the addresses that devices try to access, checking permissions at every step.
This comprehensive technical guide breaks down what IvtHandleInterrupt does, why it triggers the DRIVER_VERIFIER_DMA_VIOLATION (0xE6) bug check, and how to diagnose and resolve these system crashes. What is IvtHandleInterrupt ? ivthandleinterrupt
Stack management
If Driver Verifier is active on your machine, it will aggressively cause 0xE6 bug checks. Even if you believe it is off, you must flush its configurations from the Windows Registry. It sends a signal back to the hardware
This identifier is often encountered during a with the error code DRIVER_VERIFIER_DMA_VIOLATION (Stop Code 0xE6 ). It signifies that a driver tried to access memory directly in a way that violates the security policies established by the IOMMU (Input-Output Memory Management Unit).
Windows, Linux, and macOS all have a variation of an IVT handler at their core to manage communication between the OS and your hardware. Even if you believe it is off, you
The RegisterInterruptHandler function takes two arguments:
If you are writing new firmware, consider using the standard weak-linked IRQ_Handler symbols provided by your MCU vendor. But if your project already uses ivthandleinterrupt , respect the pattern—document it well, ensure stack alignment, and always clear the interrupt source before returning.
Here's a step-by-step explanation: