| Debugging Tools for Windows |
The KMODE_EXCEPTION_NOT_HANDLED bug check has a value of 0x0000001E. This indicates that a kernel-mode program generated an exception which the error handler did not catch.
The following parameters are displayed on the blue screen.
| Parameter | Description |
|---|---|
| 1 | The exception code that was not handled |
| 2 | The address at which the exception occurred |
| 3 | Parameter 0 of the exception |
| 4 | Parameter 1 of the exception |
This is a very common bug check. To interpret it, you must identify which exception was generated.
Common exception codes include:
An unaligned data reference was encountered.
A breakpoint or ASSERT was encountered when no kernel debugger was attached to the system.
A memory access violation occurred. (Parameter 4 of the bug check is the address that the driver attempted to access.)
For a complete list of exception codes, see the ntstatus.h file located in the inc directory of the Windows Driver Kit.
If you are not equipped to debug this problem, you should use some basic troubleshooting techniques. If a driver is identified in the bug check message, disable the driver or check with the manufacturer for driver updates. Try changing video adapters. Check with your hardware vendor for any BIOS updates. Disable BIOS memory options such as caching or shadowing.
If you plan to debug this problem, you may find it difficult to obtain a stack trace. Parameter 2 (the exception address) should pinpoint the driver or function that caused this problem.
If exception code 0x80000003 occurs, this indicates that a hard-coded breakpoint or assertion was hit, but the system was started with the /NODEBUG switch. This problem should rarely occur. If it occurs repeatedly, make sure a kernel debugger is connected and the system is started with the /DEBUG switch.
If exception code 0x80000002 occurs, the trap frame will supply additional information.
If the specific cause of the exception is unknown, the following should be considered:
Hardware incompatibility. First, make sure that any new hardware installed is listed in the Microsoft Windows Marketplace Tested Products List.
Faulty device driver or system service. In addition, a faulty device driver or system service might be responsible for this error. Hardware issues, such as BIOS incompatibilities, memory conflicts, and IRQ conflicts can also generate this error.
If a driver is listed by name within the bug check message, disable or remove that driver. Disable or remove any drivers or services that were recently added. If the error occurs during the startup sequence and the system partition is formatted with NTFS file system, you might be able to use Safe Mode to rename or delete the faulty driver. If the driver is used as part of the system startup process in Safe Mode, you need to start the computer by using the Recovery Console to access the file.
If the problem is associated with Win32k.sys, the source of the error might be a third-party remote control program. If such software is installed, the service can be removed by starting the system using the Recovery Console and deleting the offending system service file.
Check the System Log in Event Viewer for additional error messages that might help pinpoint the device or driver that is causing bug check 0x1E. Disabling memory caching of the BIOS might also resolve the error. You should also run hardware diagnostics, especially the memory scanner, supplied by the system manufacturer. For details on these procedures, see the owner's manual for your computer.
The error that generates this message can occur after the first restart during Windows Setup, or after Setup is finished. A possible cause of the error is a system BIOS incompatibility. BIOS problems can be resolved by upgrading the system BIOS version.
To get a stack trace if the normal stack tracing procedures fail
PEXCEPTION_RECORD ExceptionRecord;
PCONTEXT ContextRecord;
} EXCEPTION_POINTERS, *PEXCEPTION_POINTERS;
ULONG PspUnhandledExceptionInSystemThread(
IN PEXCEPTION_POINTERS ExceptionPointers
)
Use the dd (Display Memory) command on that address to display the necessary data.
Note This procedure assumes that you can locate NT!PspUnhandledExceptionInSystemThread. However, in some cases (such as an access violation crash) you will not be able to do this. In that case, look for ntoskrnl!KiDispatchException. The third parameter passed to this function is a trap frame address. Use the .trap (Display Trap Frame) command with this address to set the Register Context to the proper value. You can then perform stack traces and issue other commands.
Here is an example of bug check 0x1E on an x86 processor:
Bugcheck code 0000001e
Arguments c0000005 8013cd0a 00000000 0362cffff
kd> kb start with a stack trace
FramePtr RetAddr Param1 Param2 Param3 Function Name
8013ed5c 801263ba 00000000 00000000 fe40cb00 NT!_DbgBreakPoint
8013eecc 8013313c 0000001e c0000005 8013cd0a NT!_KeBugCheckEx+0x194
fe40cad0 8013318e fe40caf8 801359ff fe40cb00 NT!PspUnhandledExceptionInSystemThread+0x18
fe40cad8 801359ff fe40cb00 00000000 fe40cb00 NT!PspSystemThreadStartup+0x4a
fe40cf7c 8013cb8e fe43a44c ff6ce388 00000000 NT!_except_handler3+0x47
00000000 00000000 00000000 00000000 00000000 NT!KiThreadStartup+0xe
kd> dd fe40caf8 L2 dump EXCEPTION_POINTERS structure
0xFE40CAF8 fe40cd88 fe40cbc4 ..@...@.
kd> .exr fe40cd88 first DWORD is the exception record
Exception Record @ FE40CD88:
ExceptionCode: c0000005
ExceptionFlags: 00000000
Chained Record: 00000000
ExceptionAddress: 8013cd0a
NumberParameters: 00000002
Parameter[0]: 00000000
Parameter[1]: 0362cfff
kd> .cxr fe40cbc4 second DWORD is the context record
CtxFlags: 00010017
eax=00087000 ebx=00000000 ecx=03ff0000 edx=ff63d000 esi=0362cfff edi=036b3fff
eip=8013cd0a esp=fe40ce50 ebp=fe40cef8 iopl=0 nv dn ei pl nz ac po cy
vip=0 vif=0
cs=0008 ss=0010 ds=0023 es=0023 fs=0030 gs=0000 efl=00010617
0x8013cd0a f3a4 rep movsb
kd> kb kb gives stack for context record
ChildEBP RetAddr Args to Child
fe40ce54 80402e09 ff6c4000 ff63d000 03ff0000 NT!_RtlMoveMemory@12+0x3e
fe40ce68 80403c18 ffbc0c28 ff6ce008 ff6c4000 HAL!_HalpCopyBufferMap@20+0x49
fe40ce9c fe43b1e4 ff6cef90 ffbc0c28 ff6ce009 HAL!_IoFlushAdapterBuffers@24+0x148
fe40ceb8 fe4385b4 ff6ce388 6cd00800 ffbc0c28 QIC117!_kdi_FlushDMABuffers@20+0x28
fe40cef8 fe439894 ff6cd008 ffb6c820 fe40cf4c QIC117!_cqd_CmdReadWrite@8+0x26e
fe40cf18 fe437d92 ff6cd008 ffb6c820 ff6e4e50 QIC117!_cqd_DispatchFRB@8+0x210
fe40cf30 fe43a4f5 ff6cd008 ffb6c820 00000000 QIC117!_cqd_ProcessFRB@8+0x134
fe40cf4c 80133184 ff6ce388 00000000 00000000 QIC117!_kdi_ThreadRun@4+0xa9
fe40cf7c 8013cb8e fe43a44c ff6ce388 00000000 NT!_PspSystemThreadStartup@8+0x40