Zephyr uses an assembly wrapper named _isr_wrapper that performs context saving, calls a C function z_irq_spurious , or jumps to the proper ISR via a software-interrupt table. The logic mirrors ivthandleinterrupt exactly.
None will explicitly name IvthandleInterrupt because it’s not a standard API name.
The interrupt handling routine ( ivthandleinterrupt ) typically involves: ivthandleinterrupt
: It executes the necessary logic (e.g., reading a byte from a serial port or incrementing a system clock).
__Vectors: .word __stack_top .word Reset_Handler .word NMI_Handler .word HardFault_Handler .word MemManage_Handler ... .word ivthandleinterrupt ; IRQ0 .word ivthandleinterrupt ; IRQ1 .word ivthandleinterrupt ; IRQ2 Zephyr uses an assembly wrapper named _isr_wrapper that
This prevents the CPU from jumping to a random address due to an uninitialized table entry.
: Special instructions might be needed to signal the end of the interrupt handling. : Special instructions might be needed to signal
: The system determines the type of interrupt that has occurred. This could be from hardware (e.g., keyboard press, network packet arrival) or software (e.g., division by zero).
If you are seeing "DMA Violation" or "Interrupt" related Blue Screens of Death (BSOD), it often indicates a driver is failing to interact with the IVT or memory correctly.