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Volume 3: General-Purpose and System Instructions - Stanford ...

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24594 Rev. 3.10 February 2005 AMD64 TechnologyExceptionsException<strong>General</strong> protection,#GPRealXVirtual8086 Protected Cause of ExceptionXXA memory address exceeded a data segment limit or was non-canonical.XOne or more I/O permission bits were set in the TSS for the accessedport.XXThe CPL was greater than the IOPL <strong>and</strong> one or more I/O permissionbits were set in the TSS for the accessed port.A null data segment was used to reference memory.X The destination oper<strong>and</strong> was in a non-writable segment.Page fault, #PF X X A page fault resulted from the execution of the instruction.Alignment check, #AC X X An unaligned memory reference was performed while alignmentchecking was enabled.INSx 155

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