Intel 253668-032US User Manual

Vol. 3   6-27

INTERRUPT AND EXCEPTION HANDLING

6.15 

EXCEPTION AND INTERRUPT REFERENCE

The following sections describe conditions which generate exceptions and interrupts. 
They are arranged in the order of vector numbers. The information contained in 
these sections are as follows:

•

Exception Class — Indicates whether the exception class is a fault, trap, or 
abort type. Some exceptions can be either a fault or trap type, depending on 
when the error condition is detected. (This section is not applicable to interrupts.)

•

Description — Gives a general description of the purpose of the exception or 
interrupt type. It also describes how the processor handles the exception or 
interrupt.

•

Exception Error Code — Indicates whether an error code is saved for the 
exception. If one is saved, the contents of the error code are described. (This 
section is not applicable to interrupts.)

•

Saved Instruction Pointer — Describes which instruction the saved (or return) 
instruction pointer points to. It also indicates whether the pointer can be used to 
restart a faulting instruction.

•

Program State Change — Describes the effects of the exception or interrupt on 
the state of the currently running program or task and the possibilities of 
restarting the program or task without loss of continuity.