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triple fault
A triple fault is a special kind of exception generated by the CPU when an exception occurs while the CPU is trying to invoke the double fault exception handler, which itself handles exceptions occurring while trying to invoke a regular exception handler.
x86 processors beginning with the 80286 will cause a shutdown cycle to occur when a triple fault is encountered. This typically causes the motherboard hardware to initiate a CPU reset which in turn causes the whole computer to reboot.〔(【引用サイトリンク】title=Triple Faulting the CPU )〕
==Possible causes of triple faults==
Triple faults indicate a problem with the operating system kernel or device drivers. In modern operating systems, a triple fault is typically caused by a buffer overflow or underflow in a device driver which writes over the interrupt descriptor table (IDT). When the next interrupt happens, the processor cannot call either the needed interrupt handler or the double fault handler because the descriptors in the IDT are corrupted.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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