Device emulation support within a host data processing apparatus

摘要

A data processing apparatus 12 is provided with a memory management unit 24 which triggers memory aborts. When a memory abort occurs, data characterizing the memory abort is written to a fault status register 28 (memory-abort register). The data characterizing the memory abort includes data identifying a register number associated with the memory access which gave rise to the memory abort. This register identifying data is used to emulate the action of the memory access instruction without having to read the program instruction lead to the memory abort. This is useful in providing virtualization support for a virtual data processing apparatus 2.