通过上面的分析，发现设置一个中断处理是非常复杂的，下面就来通过图来分析一个中断发生时，中断处理的过程如下图：@H_404_5@

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其实所有上面代码，就是设置这些流程里工作的函数关键代码，以便整个中断连接起来。其中一些函数是在汇编代码里面，这些都需要仔细分析才能理解。@H_404_5@

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主要调用下面这两个汇编代码，如下：@H_404_5@

#001 .func KiInterruptTemplate@H_404_5@

#002 _KiInterruptTemplate:@H_404_5@

#003 @H_404_5@

#004 /* Enter interrupt trap */@H_404_5@

#005 INT_PROLOG kit_a,kit_t,DoPushFakeErrorCode@H_404_5@

#006 @H_404_5@

#007 _KiInterruptTemplate2ndDispatch:@H_404_5@

#008 /* Dummy code,will be replaced by the address of the KINTERRUPT */@H_404_5@

#009 mov edi,0@H_404_5@

#010 @H_404_5@

#011 _KiInterruptTemplateObject:@H_404_5@

#012 /* Dummy jump,will be replaced by the actual jump */@H_404_5@

#013 jmp _KeSynchronizeExecution@12@H_404_5@

#014 @H_404_5@

#015 _KiInterruptTemplateDispatch:@H_404_5@

#016 /* Marks the end of the template so that the jump above can be edited */@H_404_5@

#017 @H_404_5@

#018 TRAP_FIXUPS kit_a,DoFixupV86,DoFixupAbios@H_404_5@

#019 .endfunc@H_404_5@

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和@H_404_5@

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#001 .func KiInterruptDispatch@0@H_404_5@

#002 _KiInterruptDispatch@0:@H_404_5@

#003 @H_404_5@

#004 /* Increase interrupt count */@H_404_5@

#005 inc dword ptr PCR[KPCR_PRCB_INTERRUPT_COUNT]@H_404_5@

#006 @H_404_5@

#007 /* Save trap frame */@H_404_5@

#008 mov ebp,esp@H_404_5@

#009 @H_404_5@

#010 /* Save vector and IRQL */@H_404_5@

#011 mov eax,[edi+KINTERRUPT_VECTOR]@H_404_5@

#012 mov ecx,[edi+KINTERRUPT_SYNCHRONIZE_IRQL]@H_404_5@

#013 @H_404_5@

#014 /* Save old irql */@H_404_5@

#015 push eax@H_404_5@

#016 sub esp,4@H_404_5@

#017 @H_404_5@

#018 /* Begin interrupt */@H_404_5@

#019 push esp@H_404_5@

#020 push eax@H_404_5@

#021 push ecx@H_404_5@

#022 call _HalBeginSystemInterrupt@12@H_404_5@

#023 @H_404_5@

#024 /* Check if it was handled */@H_404_5@

#025 or al,al@H_404_5@

#026 jz SpurIoUsInt@H_404_5@

#027 @H_404_5@

#028 /* Acquire the lock */@H_404_5@

#029 GetIntLock:@H_404_5@

#030 mov esi,[edi+KINTERRUPT_ACTUAL_LOCK]@H_404_5@

#031 ACQUIRE_SPINLOCK(esi,IntSpin)@H_404_5@

#032 @H_404_5@

#033 /* Make sure that this interrupt isn't storming */@H_404_5@

#034 VERIFY_INT kid@H_404_5@

#035 @H_404_5@

#036 /* Save the tick count */@H_404_5@

#037 mov ebx,_KeTickCount@H_404_5@

#038 @H_404_5@

#039 /* Call the ISR */@H_404_5@

#040 mov eax,[edi+KINTERRUPT_SERVICE_CONTEXT]@H_404_5@

#041 push eax@H_404_5@

#042 push edi@H_404_5@

#043 call [edi+KINTERRUPT_SERVICE_ROUTINE]@H_404_5@

#044 @H_404_5@

#045 /* Check if the ISR timed out */@H_404_5@

#046 add ebx,_KiISRTimeout@H_404_5@

#047 cmp _KeTickCount,ebx@H_404_5@

#048 jnc IsrTimeout@H_404_5@

#049 @H_404_5@

#050 ReleaseLock:@H_404_5@

#051 /* Release the lock */@H_404_5@

#052 RELEASE_SPINLOCK(esi)@H_404_5@

#053 @H_404_5@

#054 /* Exit the interrupt */@H_404_5@

#055 INT_EPILOG 0@H_404_5@

#056 @H_404_5@

#057 SpurIoUsInt:@H_404_5@

#058 /* Exit the interrupt */@H_404_5@

#059 add esp,8@H_404_5@

#060 INT_EPILOG 1@H_404_5@

#061 @H_404_5@

#062 #ifdef CONFIG_SMP@H_404_5@

#063 IntSpin:@H_404_5@

#064 SPIN_ON_LOCK(esi,GetIntLock)@H_404_5@

#065 #endif@H_404_5@

#066 @H_404_5@

#067 IsrTimeout:@H_404_5@

#068 /* Print warning message */@H_404_5@

#069 push [edi+KINTERRUPT_SERVICE_ROUTINE]@H_404_5@

#070 push offset _IsrTimeoutMsg@H_404_5@

#071 call _DbgPrint@H_404_5@

#072 add esp,8@H_404_5@

#073 @H_404_5@

#074 /* Break into debugger,then continue */@H_404_5@

#075 int 3@H_404_5@

#076 jmp ReleaseLock@H_404_5@

#077 @H_404_5@

#078 /* Cleanup verification */@H_404_5@

#079 VERIFY_INT_END kid,0@H_404_5@

#080.endfunc@H_404_5@