Techwiki:Win32k/desktops
This is WIP!
Contents
Desktop creation
xxxCreateDesktop2: f6ef7a30 bf89c2a4 win32k!CreateDesktopHeap+0x73 f6ef7a80 bf879e12 win32k!xxxCreateDesktop2+0x195 f6ef7ab0 bf879dc0 win32k!ParseDesktop+0x93 f6ef7ae8 806024b0 win32k!ParseWindowStation+0xab f6ef7b14 8060270c nt!ExpWin32SessionCallout+0x3c f6ef7b58 805b37d9 nt!ExpWin32ParseProcedure+0x60 f6ef7be0 805b010b nt!ObpLookupObjectName+0x119 f6ef7c34 bf87aa19 nt!ObOpenObjectByName+0xeb f6ef7cfc bf89d235 win32k!xxxCreateDesktop+0x6d f6ef7d48 8053cbc8 win32k!NtUserCreateDesktop+0x95
Unmapping the startup desktop
kd> k ChildEBP RetAddr f6f87aec 806024b0 win32k!UnmapDesktop f6f87b18 80602572 nt!ExpWin32SessionCallout+0x3c f6f87b44 805b11d3 nt!ExpWin32CloseProcedure+0x5c f6f87b74 805b0b27 nt!ObpDecrementHandleCount+0x119 f6f87b9c 805b0bc5 nt!ObpCloseHandleTableEntry+0x14d f6f87be4 805b0cd6 nt!ObpCloseHandle+0x87 f6f87bf8 bf87b773 nt!ObCloseHandle+0x12 f6f87c18 bf877114 win32k!DestroyProcessInfo+0x1f2 f6f87c40 bf8771bc win32k!xxxUserProcessCallout+0xb7 f6f87c5c 805c761b win32k!W32pProcessCallout+0x42 f6f87d08 805c7a3a nt!PspExitThread+0x423 f6f87d28 805c7c15 nt!PspTerminateThreadByPointer+0x52 f6f87d54 8053cbc8 nt!NtTerminateProcess+0x105 f6f87d54 7c91eb94 nt!KiFastCallEntry+0xf8 0022fdc4 7c91e89a ntdll!KiFastSystemCallRet 0022fe84 7c91f0aa ntdll!NtTerminateProcess+0xc
kd> k ChildEBP RetAddr f9aad9d0 806024b0 win32k!FreeDesktop f9aad9fc 8060262f nt!ExpWin32SessionCallout+0x3c f9aada14 805afb2f nt!ExpWin32DeleteProcedure+0x41 f9aada30 80522181 nt!ObpRemoveObjectRoutine+0xdf f9aada54 bf8038ee nt!ObfDereferenceObject+0x5f f9aada5c bf8029d3 win32k!UserDereferenceObject+0xe f9aada68 bf8a58ba win32k!PopAndFreeW32ThreadLock+0x25 f9aadd30 bf88dc63 win32k!xxxDesktopThread+0x864 f9aadd40 bf8010ba win32k!xxxCreateSystemThreads+0x6a f9aadd54 8053cbc8 win32k!NtUserCallOneParam+0x23 f9aadd54 7c91eb94 nt!KiFastCallEntry+0xf8 012dffe0 75b0ba1a ntdll!KiFastSystemCallRet
kd> k ChildEBP RetAddr f9aad9d0 806024b0 win32k!FreeDesktop f9aad9fc 8060262f nt!ExpWin32SessionCallout+0x3c f9aada14 805afb2f nt!ExpWin32DeleteProcedure+0x41 f9aada30 80522181 nt!ObpRemoveObjectRoutine+0xdf f9aada54 bf8038ee nt!ObfDereferenceObject+0x5f f9aada5c bf8029d3 win32k!UserDereferenceObject+0xe f9aada68 bf8a58ba win32k!PopAndFreeW32ThreadLock+0x25 f9aadd30 bf88dc63 win32k!xxxDesktopThread+0x864 f9aadd40 bf8010ba win32k!xxxCreateSystemThreads+0x6a f9aadd54 8053cbc8 win32k!NtUserCallOneParam+0x23 f9aadd54 7c91eb94 nt!KiFastCallEntry+0xf8 012dffe0 75b0ba1a ntdll!KiFastSystemCallRet
kd> k ChildEBP RetAddr f6845b34 806024b0 win32k!UnmapDesktop f6845b60 80602572 nt!ExpWin32SessionCallout+0x3c f6845b8c 805b11d3 nt!ExpWin32CloseProcedure+0x5c f6845bbc 805b0b27 nt!ObpDecrementHandleCount+0x119 f6845be4 805b72e3 nt!ObpCloseHandleTableEntry+0x14d f6845c04 8060329f nt!ObpCloseHandleProcedure+0x1f f6845c34 805b73dc nt!ExSweepHandleTable+0x4f f6845c60 805c77e1 nt!ObKillProcess+0x5c f6845d08 805c7a3a nt!PspExitThread+0x5e9 f6845d28 805c7c15 nt!PspTerminateThreadByPointer+0x52 f6845d54 8053cbc8 nt!NtTerminateProcess+0x105 f6845d54 7c91eb94 nt!KiFastCallEntry+0xf8 0022fdc4 7c91e89a ntdll!KiFastSystemCallRet 0022fe84 7c91f0aa ntdll!NtTerminateProcess+0xc 0022fec4 7c81ca96 ntdll!RtlAnsiStringToUnicodeString+0x7d
Desktop heap mapping
f6ef77b0 bf879ccd nt!MmMapViewOfSection f6ef7828 806024b0 win32k!MapDesktop+0xe5 f6ef7854 8060269f nt!ExpWin32SessionCallout+0x3c f6ef7880 805b1807 nt!ExpWin32OpenProcedure+0x67 f6ef7930 805b1ded nt!ObpIncrementHandleCount+0x2cf f6ef7998 805b02ac nt!ObpCreateHandle+0x17d f6ef79e8 bf87aa19 nt!ObOpenObjectByName+0x28c f6ef7ab0 bf87833a win32k!xxxCreateDesktop+0x6d f6ef7bc0 bf878d9c win32k!xxxResolveDesktop+0x815 f6ef7cc0 bf819e16 win32k!xxxCreateThreadInfo+0x4d5 f6ef7cd4 bf819f1c win32k!UserThreadCallout+0x72 f6ef7cf0 805c1785 win32k!W32pThreadCallout+0x3d f6ef7d54 8053c8ce nt!PsConvertToGuiThread+0x139 f6ef7980 bf89bf8e nt!MmMapViewOfSection f6ef79fc bf89c3f0 win32k!UserCreateHeap+0x4a f6ef7a30 bf89c2a4 win32k!CreateDesktopHeap+0x73 f6ef7a80 bf879e12 win32k!xxxCreateDesktop2+0x195 f6ef7ab0 bf879dc0 win32k!ParseDesktop+0x93 f6ef7ae8 806024b0 win32k!ParseWindowStation+0xab f6ef7b14 8060270c nt!ExpWin32SessionCallout+0x3c f6ef7b58 805b37d9 nt!ExpWin32ParseProcedure+0x60 f6ef7be0 805b010b nt!ObpLookupObjectName+0x119 f6ef7c34 bf87aa19 nt!ObOpenObjectByName+0xeb f6ef7cfc bf89d235 win32k!xxxCreateDesktop+0x6d f6ef7d48 8053cbc8 win32k!NtUserCreateDesktop+0x95 f6ef79fc bf879ccd nt!MmMapViewOfSection f6ef7a74 806024b0 win32k!MapDesktop+0xe5 f6ef7aa0 8060269f nt!ExpWin32SessionCallout+0x3c f6ef7acc 805b1807 nt!ExpWin32OpenProcedure+0x67 f6ef7b7c 805b1ded nt!ObpIncrementHandleCount+0x2cf f6ef7be4 805b02ac nt!ObpCreateHandle+0x17d f6ef7c34 bf87aa19 nt!ObOpenObjectByName+0x28c f6ef7cfc bf89d235 win32k!xxxCreateDesktop+0x6d f6ef7d48 8053cbc8 win32k!NtUserCreateDesktop+0x95 f6ef7bd4 bf879ccd nt!MmMapViewOfSection f6ef7c4c bf87ab0e win32k!MapDesktop+0xe5 f6ef7cfc bf89d235 win32k!xxxCreateDesktop+0x1bc f6ef7d48 8053cbc8 win32k!NtUserCreateDesktop+0x95 f6f177b0 bf879ccd nt!MmMapViewOfSection f6f17828 806024b0 win32k!MapDesktop+0xe5 f6f17854 8060269f nt!ExpWin32SessionCallout+0x3c f6f17880 805b1807 nt!ExpWin32OpenProcedure+0x67 f6f17930 805b1ded nt!ObpIncrementHandleCount+0x2cf f6f17998 805b02ac nt!ObpCreateHandle+0x17d f6f179e8 bf87aa19 nt!ObOpenObjectByName+0x28c f6f17ab0 bf87833a win32k!xxxCreateDesktop+0x6d f6f17bc0 bf878d9c win32k!xxxResolveDesktop+0x815 f6f17cc0 bf819e16 win32k!xxxCreateThreadInfo+0x4d5 f6f17cd4 bf819f1c win32k!UserThreadCallout+0x72 f6f17cf0 805c1785 win32k!W32pThreadCallout+0x3d f6f17d54 8053c8ce nt!PsConvertToGuiThread+0x139
win32k!MapDesktop
f9a1d944 806024b0 win32k!MapDesktop f9a1d970 8060269f nt!ExpWin32SessionCallout+0x3c f9a1d99c 805b1807 nt!ExpWin32OpenProcedure+0x67 f9a1da4c 805b1ded nt!ObpIncrementHandleCount+0x2cf f9a1dab4 805b02ac nt!ObpCreateHandle+0x17d f9a1db04 bf87aa19 nt!ObOpenObjectByName+0x28c f9a1dbcc bf87833a win32k!xxxCreateDesktop+0x6d f9a1dcdc bf89225a win32k!xxxResolveDesktop+0x815 f9a1dd4c 8053cbc8 win32k!NtUserResolveDesktop+0xdb
f701f828 806024b0 win32k!MapDesktop f701f854 8060269f nt!ExpWin32SessionCallout+0x3c f701f880 805b1807 nt!ExpWin32OpenProcedure+0x67 f701f930 805b1ded nt!ObpIncrementHandleCount+0x2cf f701f998 805b02ac nt!ObpCreateHandle+0x17d f701f9e8 bf87aa19 nt!ObOpenObjectByName+0x28c f701fab0 bf87833a win32k!xxxCreateDesktop+0x6d f701fbc0 bf878d9c win32k!xxxResolveDesktop+0x815 f701fcc0 bf819e16 win32k!xxxCreateThreadInfo+0x4d5 f701fcd4 bf819f1c win32k!UserThreadCallout+0x72 f701fcf0 805c1785 win32k!W32pThreadCallout+0x3d f701fd54 8053c8ce nt!PsConvertToGuiThread+0x139
f701fa74 806024b0 win32k!MapDesktop f701faa0 8060269f nt!ExpWin32SessionCallout+0x3c f701facc 805b1807 nt!ExpWin32OpenProcedure+0x67 f701fb7c 805b1ded nt!ObpIncrementHandleCount+0x2cf f701fbe4 805b02ac nt!ObpCreateHandle+0x17d f701fc34 bf87aa19 nt!ObOpenObjectByName+0x28c f701fcfc bf89d235 win32k!xxxCreateDesktop+0x6d f701fd48 8053cbc8 win32k!NtUserCreateDesktop+0x95
f701fc4c bf87ab0e win32k!MapDesktop f701fcfc bf89d235 win32k!xxxCreateDesktop+0x1bc f701fd48 8053cbc8 win32k!NtUserCreateDesktop+0x95
f701f98c 806024b0 win32k!MapDesktop f701f9b8 8060269f nt!ExpWin32SessionCallout+0x3c f701f9e4 805b1807 nt!ExpWin32OpenProcedure+0x67 f701fa94 805b7932 nt!ObpIncrementHandleCount+0x2cf f701fb38 80603c7c nt!ObDupHandleProcedure+0x9a f701fb74 805b7982 nt!ExDupHandleTable+0x11a f701fb9c 805c5ca6 nt!ObInitProcess+0x34 f701fce4 805c62f3 nt!PspCreateProcess+0x308 f701fd38 8053cbc8 nt!NtCreateProcessEx+0x77
f6fcf828 806024b0 win32k!MapDesktop f6fcf854 8060269f nt!ExpWin32SessionCallout+0x3c f6fcf880 805b1807 nt!ExpWin32OpenProcedure+0x67 f6fcf930 805b1ded nt!ObpIncrementHandleCount+0x2cf f6fcf998 805b02ac nt!ObpCreateHandle+0x17d f6fcf9e8 bf87aa19 nt!ObOpenObjectByName+0x28c f6fcfab0 bf87833a win32k!xxxCreateDesktop+0x6d f6fcfbc0 bf878d9c win32k!xxxResolveDesktop+0x815 f6fcfcc0 bf819e16 win32k!xxxCreateThreadInfo+0x4d5 f6fcfcd4 bf819f1c win32k!UserThreadCallout+0x72 f6fcfcf0 805c1785 win32k!W32pThreadCallout+0x3d f6fcfd54 8053c8ce nt!PsConvertToGuiThread+0x139
f9a1da80 806024b0 win32k!MapDesktop f9a1daac 8060269f nt!ExpWin32SessionCallout+0x3c f9a1dad8 805b1807 nt!ExpWin32OpenProcedure+0x67 f9a1db88 805b1ded nt!ObpIncrementHandleCount+0x2cf f9a1dbf0 805b0494 nt!ObpCreateHandle+0x17d f9a1dcc0 bf89235f nt!ObOpenObjectByPointer+0xa4 f9a1dd10 bf8862a5 win32k!xxxSetCsrssThreadDesktop+0x6e f9a1dd30 bf88615f win32k!xxxSetInformationThread+0x9a f9a1dd4c 8053cbc8 win32k!NtUserSetInformationThread+0x31
f9a1dca8 bf86bc92 win32k!MapDesktop f9a1dcd4 bf892383 win32k!xxxSetThreadDesktop+0x3a f9a1dd10 bf8862a5 win32k!xxxSetCsrssThreadDesktop+0xc3 f9a1dd30 bf88615f win32k!xxxSetInformationThread+0x9a f9a1dd4c 8053cbc8 win32k!NtUserSetInformationThread+0x31
f99fda38 bf86bc92 win32k!MapDesktop f99fda64 bf8a5608 win32k!xxxSetThreadDesktop+0x3a f99fdd30 bf88dc63 win32k!xxxDesktopThread+0x576 f99fdd40 bf8010ba win32k!xxxCreateSystemThreads+0x6a f99fdd54 8053cbc8 win32k!NtUserCallOneParam+0x23
f99fda38 bf86bc92 win32k!MapDesktop f99fda64 bf8a5896 win32k!xxxSetThreadDesktop+0x3a f99fdd30 bf88dc63 win32k!xxxDesktopThread+0x840 f99fdd40 bf8010ba win32k!xxxCreateSystemThreads+0x6a f99fdd54 8053cbc8 win32k!NtUserCallOneParam+0x23
f6d41d14 bf86bc92 win32k!MapDesktop f6d41d40 bf86bde2 win32k!xxxSetThreadDesktop+0x3a f6d41d58 8053cbc8 win32k!NtUserSetThreadDesktop+0x2f f6d41d58 7c91eb94 nt!KiFastCallEntry+0xf8 00efff70 7e37f0ac ntdll!KiFastSystemCallRet 00efffb4 7c80b6a3 USER32!NtUserSetThreadDesktop+0xc 00efffec 00000000 KERNEL32!BaseThreadStart+0x37
SwitchDesktop
Desktop thread: ChildEBP RetAddr Args to Child f87a0b78 bf81d7d7 00000000 81df6038 e1443310 win32k!xxxSetThreadDesktop f87a0be0 bf85e762 bc6306e8 00000046 00000000 win32k!xxxDesktopWndProc+0xdb WM_WINDOWPOSCHANGING f87a0c44 bf846a6b e1484560 bf994180 e1484560 win32k!xxxReceiveMessage+0x293 f87a0c80 bf879dea f87a0cdc 000025ff 00000000 win32k!xxxRealInternalGetMessage+0x1ce f87a0d34 bf80b656 e1484560 00000001 f87a0d64 win32k!xxxDesktopThread+0x297 f87a0d44 bf874990 bf994180 f87a0d64 0071fff4 win32k!xxxCreateSystemThreads+0x68 f87a0d54 805303c4 00000000 00000022 00000000 win32k!NtUserCallOneParam+0x20 winlogon threaad: ChildEBP RetAddr Args to Child f8760a0c 804fd59e 81e05618 81e055a8 81db2ad0 nt!KiSwapContext+0x2f (FPO: [Uses EBP] [0,0,4]) f8760a1c 804f631c 00000240 e138aca8 00000000 nt!KiSwapThread+0x6a (FPO: [Uses EBP] [0,0,4]) f8760a44 bf87a528 00000000 0000000d 00000001 nt!KeWaitForSingleObject+0x1c0 (FPO: [Non-Fpo]) f8760a80 bf846a3b 00000200 00000000 00000000 win32k!xxxSleepThread+0x189 (FPO: [Non-Fpo]) f8760b1c bf859111 bc6306e8 00000046 00000000 win32k!xxxInterSendMsgEx+0x6f9 (FPO: [Non-Fpo]) f8760b68 bf8714d3 bc6306e8 00000046 00000000 win32k!xxxSendMessageTimeout+0x11c (FPO: [Non-Fpo]) f8760b88 bf8457d8 bc6306e8 00000046 00000000 win32k!xxxSendMessage+0x1a (FPO: [4,0,0]) f8760c4c bf84563b bc6306e8 f8760cb0 00000000 win32k!xxxCalcValidRects+0xe4 (FPO: [2,40,3]) f8760ca8 bf845bb9 bf997c80 00000000 bf994180 win32k!xxxEndDeferWindowPosEx+0xb9 (FPO: [Non-Fpo]) f8760cc4 bf812274 bc6306e8 00000000 00000000 win32k!xxxSetWindowPos+0xbe (FPO: [Non-Fpo]) f8760d30 bf812637 00000794 81e055a8 81e95d5c win32k!xxxSwitchDesktop+0x274 (FPO: [Non-Fpo]) f8760d58 805303c4 00000558 806bcba9 00235000 win32k!NtUserSwitchDesktop+0x91 (FPO: [Non-Fpo])
win32k!ProcessMouseInput
kd> !thread 0x81d97888 THREAD 81d97888 Cid 0234.0264 Teb: 7ffd8000 Win32Thread: e1484560 RUNNING on processor 1 IRP List: 81df0980: (0006,0190) Flags: 00000970 Mdl: 00000000 81df3e70: (0006,0190) Flags: 00000970 Mdl: 00000000 Not impersonating DeviceMap e10092b8 Owning Process 0 Image: <Unknown> Attached Process 81e04020 Image: csrss.exe Wait Start TickCount 13229 Ticks: 3 (0:00:00:00.046) Context Switch Count 2405 LargeStack UserTime 00:00:00.000 KernelTime 00:00:02.234 Start Address 0x75aec252 Stack Init f87a1000 Current f87a0730 Base f87a1000 Limit f879e000 Call 0 Priority 13 BasePriority 13 PriorityDecrement 0 DecrementCount 16 ChildEBP RetAddr Args to Child f87a0614 bf8600d3 f7fec0e0 bd05362c 0000005c nt!memmove+0x33 f87a0638 bf87c8f3 0000000e 00000000 00000000 win32k!vSrcCopyS32D32Identity+0x59 (FPO: [Non-Fpo]) f87a084c bf87829e e13026f0 00000000 00000000 win32k!EngCopyBits+0x4e1 (FPO: [6,127,3]) f87a0894 bf83dd10 bf87c6e0 bf999bbc e13026f0 win32k!OffCopyBits+0x7b (FPO: [Non-Fpo]) f87a094c bf837112 e141f048 f87a09c0 e1114018 win32k!vSpWriteToScreen+0x97 (FPO: [Non-Fpo]) f87a09dc bf83d7e1 e1114018 00000002 00000216 win32k!vSpRedrawUncoveredArea+0x186 (FPO: [Non-Fpo]) f87a0aa8 bf83e68d e141f048 f87a0acc 00000000 win32k!bSpUpdatePosition+0x171 (FPO: [3,44,3]) f87a0ad8 bf82da04 e13026f0 000001a0 00000216 win32k!EngMovePointer+0x13e (FPO: [Non-Fpo]) f87a0afc bf82d980 e141f008 000001a0 00000216 win32k!vMovePointer+0x70 (FPO: [Non-Fpo]) f87a0b20 bf821a3a e141f008 000001a0 00000216 win32k!GreMovePointer+0xd7 (FPO: [Non-Fpo]) f87a0b5c bf821d98 000001a0 00000216 00000000 win32k!xxxMoveEventAbsolute+0x136 (FPO: [Non-Fpo]) f87a0b94 bf821e1b 0003276f 81d97888 804f9a9a win32k!ProcessMouseInput+0x16f (FPO: [Non-Fpo]) f87a0ba0 804f9a9a e1483eb8 e1483ee0 00000000 win32k!InputApc+0x4b (FPO: [3,0,1]) f87a0be8 806bcd40 00000000 00000000 f87a0c00 nt!KiDeliverApc+0x122 (FPO: [Non-Fpo]) f87a0be8 806bca20 00000000 00000000 f87a0c00 hal!HalpApcInterrupt+0xb0 (FPO: [0,2] TrapFrame @ f87a0c00) f87a0c70 bf879e6e bf994180 e1484560 00000000 hal!HalRequestSoftwareInterrupt+0x3c (FPO: [0,0,0]) f87a0c88 bf879dd2 00000002 81df1568 bf80c937 win32k!xxxMsgWaitForMultipleObjects+0x77 (FPO: [Non-Fpo]) f87a0d34 bf80b656 e1484560 00000001 f87a0d64 win32k!xxxDesktopThread+0x182 (FPO: [1,34,3]) f87a0d44 bf874990 bf994180 f87a0d64 0071fff4 win32k!xxxCreateSystemThreads+0x68 (FPO: [Non-Fpo]) f87a0d54 805303c4 00000000 00000022 00000000 win32k!NtUserCallOneParam+0x20 (FPO: [2,0,2]) f87a0d54 7ffe0304 00000000 00000022 00000000 nt!KiSystemService+0xc9 (FPO: [0,0] TrapFrame @ f87a0d64) 00000000 00000000 00000000 00000000 00000000 SharedUserData!SystemCallStub+0x4 (FPO: [0,0,0]) Another interesting trace from here: http://www.pcreview.co.uk/forums/need-help-windbg-log-t3767870.html f6da7a8c bf885998 804e37aa 00000001 00000000 win32k!zzzSetFMouseMoved+0x42 f6da7ad4 bf89fc64 00000022 006efff4 bf801087 win32k!ProcessQueuedMouseEvents+0x1c8 f6da7d30 bf884635 f6db7490 00000002 f6da7d54 win32k!RawInputThread+0x5b9 f6da7d40 bf8010aa f6db7490 f6da7d64 006efff4 win32k!xxxCreateSystemThreads+0x60 f6da7d54 804dd99f 00000000 00000022 00000000 win32k!NtUserCallOneParam+0x23
Desktop thread creation
NtUserCreateWindowStation does an lpc call to csrss to create the system threads
3: kd> !thread 0x81e6eb30 THREAD 81e6eb30 Cid 024c.0250 Teb: 7ffde000 Win32Thread: e1502638 RUNNING on processor 3 IRP List: 81ed4220: (0006,0094) Flags: 00000800 Mdl: 00000000 Not impersonating DeviceMap e10092b8 Owning Process 0 Image: <Unknown> Attached Process 81e6eda8 Image: winlogon.exe Wait Start TickCount 1705 Ticks: 30 (0:00:00:00.468) Context Switch Count 12 LargeStack UserTime 00:00:00.156 KernelTime 00:00:04.359 Start Address winlogon!__delayLoadHelper2 (0x0103c559) Stack Init f87b1000 Current f87b0c48 Base f87b1000 Limit f87ac000 Call 0 Priority 15 BasePriority 15 PriorityDecrement 0 DecrementCount 0 ChildEBP RetAddr Args to Child f87b048c bf80b4c1 e145bde0 f87b04a4 f87b04a4 nt!LpcRequestWaitReplyPort (FPO: [3,0,0]) f87b04ec bf80a89a bf994180 bf80a92a bf994180 win32k!xxxInitInput+0x57 (FPO: [Non-Fpo]) f87b04f4 bf80a92a bf994180 00000000 bf994180 win32k!CreateTerminalInput+0x15 (FPO: [1,0,0]) f87b0558 bf80a8a9 000000a8 7ffdec0e 01015182 win32k!xxxInitTerminal+0xae (FPO: [Non-Fpo]) f87b07ac bf811324 81f57850 81f57850 02000000 win32k!xxxCreateWindowStation+0xce (FPO: [Non-Fpo]) f87b0d40 805303c4 0006fb54 02000000 000000a4 win32k!NtUserCreateWindowStation+0x2d3 (FPO: [Non-Fpo]) f87b0d40 7ffe0304 0006fb54 02000000 000000a4 nt!KiSystemService+0xc9 (FPO: [0,0] TrapFrame @ f87b0d64) 0006f840 77d21e04 77d21dbc 0006fb54 02000000 SharedUserData!SystemCallStub+0x4 (FPO: [0,0,0]) WARNING: Stack unwind information not available. Following frames may be wrong. 0006fb8c 77d21c87 0006fba0 02000000 00000000 USER32!CreateWindowStationW+0x19e 0006fba8 01030e65 01015174 00000000 02000000 USER32!CreateWindowStationW+0x21 0006ff14 01031309 77e5ad86 0006fff4 00072364 winlogon!CreatePrimaryTerminal+0x120 (FPO: [Non-Fpo]) 0006ff50 0103c6d6 01000000 00000000 00072364 winlogon!MiscInitialization+0x1ca (FPO: [Uses EBP] [4,10,4]) 0006fff4 00000000 7ffdf000 000000c8 00000100 winlogon!__delayLoadHelper2+0x23f (FPO: [Non-Fpo]) 3: kd> dp f87b04a4 f87b04a4 00400028 00000000 bf813ca0 bf813b94 f87b04b4 f87b04c0 00000000 00000000 0003040a f87b04c4 0000068c 00000001 00000000 f87b04ec f87b04d4 bf813cfc 00000001 001f0003 bf994180 f87b04e4 bf994180 81f8d3a8 f87b0558 bf80a89a f87b04f4 bf994180 bf80a92a bf994180 00000000 f87b0504 bf994180 00000000 00000054 81f57890 f87b0514 00000000 00000000 e1014118 00000000
The system threads are created
2: kd> kb ChildEBP RetAddr Args to Child f87c0d44 bf874990 00000000 f87c0d64 006dfff4 win32k!xxxCreateSystemThreads f87c0d54 805303c4 00000000 00000022 00000000 win32k!NtUserCallOneParam+0x20 f87c0d54 7ffe0304 00000000 00000022 00000000 nt!KiSystemService+0xc9 006dffe0 75ae4f9e 75aec264 00000000 00000022 SharedUserData!SystemCallStub+0x4 WARNING: Frame IP not in any known module. Following frames may be wrong. 00000000 f000ff53 f000ff53 f000ff53 f000ff53 0x75ae4f9e 00000000 00000000 f000ff53 f000ff53 f000ff53 0xf000ff53
And NtUserCreateWindowStation waits until the system threads are initialized
2: kd> !thread 0x81e6eb30 THREAD 81e6eb30 Cid 024c.0250 Teb: 7ffde000 Win32Thread: e1502638 WAIT: (WrUserRequest) KernelMode Non-Alertable 81f8d3a8 SynchronizationEvent IRP List: 81ed4220: (0006,0094) Flags: 00000800 Mdl: 00000000 Not impersonating DeviceMap e10092b8 Owning Process 0 Image: <Unknown> Attached Process 81e6eda8 Image: winlogon.exe Wait Start TickCount 1736 Ticks: 0 Context Switch Count 13 LargeStack UserTime 00:00:00.156 KernelTime 00:00:04.375 Start Address winlogon!__delayLoadHelper2 (0x0103c559) Stack Init f87b1000 Current f87b0434 Base f87b1000 Limit f87ac000 Call 0 Priority 15 BasePriority 15 PriorityDecrement 0 DecrementCount 0 *** ERROR: Symbol file could not be found. Defaulted to export symbols for USER32.dll - ChildEBP RetAddr Args to Child f87b044c 804fd59e 81e6eba0 81e6eb30 81f8d3a8 nt!KiSwapContext+0x2f (FPO: [Uses EBP] [0,0,4]) f87b045c 804f631c 001f0003 00000000 00000000 nt!KiSwapThread+0x6a (FPO: [Uses EBP] [0,0,4]) f87b0484 bf80b4d3 00000000 0000000d 00000000 nt!KeWaitForSingleObject+0x1c0 (FPO: [Non-Fpo]) f87b04ec bf80a89a bf994180 bf80a92a bf994180 win32k!xxxInitInput+0x69 (FPO: [Non-Fpo]) f87b04f4 bf80a92a bf994180 00000000 bf994180 win32k!CreateTerminalInput+0x15 (FPO: [1,0,0]) f87b0558 bf80a8a9 000000a8 7ffdec0e 01015182 win32k!xxxInitTerminal+0xae (FPO: [Non-Fpo]) f87b07ac bf811324 81f57850 81f57850 02000000 win32k!xxxCreateWindowStation+0xce (FPO: [Non-Fpo]) f87b0d40 805303c4 0006fb54 02000000 000000a4 win32k!NtUserCreateWindowStation+0x2d3 (FPO: [Non-Fpo]) f87b0d40 7ffe0304 0006fb54 02000000 000000a4 nt!KiSystemService+0xc9 (FPO: [0,0] TrapFrame @ f87b0d64) 0006f840 77d21e04 77d21dbc 0006fb54 02000000 SharedUserData!SystemCallStub+0x4 (FPO: [0,0,0]) WARNING: Stack unwind information not available. Following frames may be wrong. 0006fb8c 77d21c87 0006fba0 02000000 00000000 USER32!CreateWindowStationW+0x19e 0006fba8 01030e65 01015174 00000000 02000000 USER32!CreateWindowStationW+0x21 0006ff14 01031309 77e5ad86 0006fff4 00072364 winlogon!CreatePrimaryTerminal+0x120 (FPO: [Non-Fpo]) 0006ff50 0103c6d6 01000000 00000000 00072364 winlogon!MiscInitialization+0x1ca (FPO: [Uses EBP] [4,10,4]) 0006fff4 00000000 7ffdf000 000000c8 00000100 winlogon!__delayLoadHelper2+0x23f (FPO: [Non-Fpo])