//WIN95SYS - Win95 System Structures // //Some powerful Win95 structs that Microsoft dont want us to know about. //These are much like the Win95 implementation of the SFTs found in DOS. //Last minute note (Nov/10/98): Unfortunately some of the fields in these // structures broke on Win98. More especifically I dunno where the Process // database structure lies in memory. However the 'RegisterServiceProcess' // API is still exported from KERNEL32 and so our nasty trick with the // 'Task Bar' still works there. Under NT this story is out of scope. JQ. //Kernel32 objects #define K32OBJ_SEMAPHORE 0x1 #define K32OBJ_EVENT 0x2 #define K32OBJ_MUTEX 0x3 #define K32OBJ_CRITICAL_SECTION 0x4 #define K32OBJ_PROCESS 0x5 #define K32OBJ_THREAD 0x6 #define K32OBJ_FILE 0x7 #define K32OBJ_CHANGE 0x8 #define K32OBJ_CONSOLE 0x9 #define K32OBJ_SCREEN_BUFFER 0xA #define K32OBJ_MEM_MAPPED_FILE 0xB #define K32OBJ_SERIAL 0xC #define K32OBJ_DEVICE_IOCTL 0xD #define K32OBJ_PIPE 0xE #define K32OBJ_MAILSLOT 0xF #define K32OBJ_TOOLHELP_SNAPSHOT 0x10 #define K32OBJ_SOCKET 0x11 //Process Database flags #define fDebugSingle 0x00000001 #define fCreateProcessEvent 0x00000002 #define fExitProcessEvent 0x00000004 #define fWin16Process 0x00000008 #define fDosProcess 0x00000010 #define fConsoleProcess 0x00000020 #define fFileApisAreOem 0x00000040 #define fNukeProcess 0x00000080 #define fServiceProcess 0x00000100 #define fLoginScriptHack 0x00000800 //Thread Database flags #define fCreateThreadEvent 0x00000001 #define fCancelExceptionAbort 0x00000002 #define fOnTempStack 0x00000004 #define fGrowableStack 0x00000008 #define fDelaySingleStep 0x00000010 #define fOpenExeAsImmovableFile 0x00000020 #define fCreateSuspended 0x00000040 #define fStackOverflow 0x00000080 #define fNestedCleanAPCs 0x00000100 #define fWasOemNowAnsi 0x00000200 #define fOKToSetThreadOem 0x00000400 #pragma pack(1) //MODREF and IMTE structures typedef struct _MODREF { struct _MODREF *pNextModRef; // 00h DWORD un1; // 04h DWORD un2; // 08h DWORD un3; // 0Ch WORD mteIndex; // 10h WORD un4; // 12h DWORD un5; // 14h PVOID ppdb; // 18h Pointer to process database DWORD un6; // 1Ch DWORD un7; // 20h DWORD un8; // 24h } MODREF, *PMODREF; typedef struct _IMTE { DWORD un1; // 00h PIMAGE_NT_HEADERS pNTHdr; // 04h DWORD un2; // 08h PSTR pszFileName; // 0Ch PSTR pszModName; // 10h WORD cbFileName; // 14h WORD cbModName; // 16h DWORD un3; // 18h DWORD cSections; // 1Ch DWORD un5; // 20h DWORD baseAddress; // 24h WORD hModule16; // 28h WORD cUsage; // 2Ah DWORD un7; // 2Ch PSTR pszFileName2; // 30h WORD cbFileName2; // 34h DWORD pszModName2; // 36h WORD cbModName2; // 3Ah } IMTE, *PIMTE; //Process Database structure typedef struct _ENVIRONMENT_DATABASE { PSTR pszEnvironment; // 00h Pointer to Environment DWORD un1; // 04h PSTR pszCmdLine; // 08h Pointer to command line PSTR pszCurrDirectory; // 0Ch Pointer to current directory LPSTARTUPINFOA pStartupInfo;// 10h Pointer to STARTUPINFOA struct HANDLE hStdIn; // 14h Standard Input HANDLE hStdOut; // 18h Standard Output HANDLE hStdErr; // 1Ch Standard Error DWORD un2; // 20h DWORD InheritConsole; // 24h DWORD BreakType; // 28h DWORD BreakSem; // 2Ch DWORD BreakEvent; // 30h DWORD BreakThreadID; // 34h DWORD BreakHandlers; // 38h } ENVIRONMENT_DATABASE, *PENVIRONMENT_DATABASE; typedef struct _HANDLE_TABLE_ENTRY { DWORD flags; // Valid flags depend on what type of object this is PVOID pObject; // Pointer to the object that the handle refers to } HANDLE_TABLE_ENTRY, *PHANDLE_TABLE_ENTRY; typedef struct _HANDLE_TABLE { DWORD cEntries; // Max number of handles in table HANDLE_TABLE_ENTRY array[1]; // An array (number is given by cEntries) } HANDLE_TABLE, *PHANDLE_TABLE; typedef struct _PROCESS_DATABASE { DWORD Type; // 00h KERNEL32 object type (5) DWORD cReference; // 04h Number of references to process DWORD un1; // 08h DWORD someEvent; // 0Ch An event object (What's it used for???) DWORD TerminationStatus; // 10h Returned by GetExitCodeProcess DWORD un2; // 14h DWORD DefaultHeap; // 18h Address of the process heap DWORD MemoryContext; // 1Ch pointer to the process's context DWORD flags; // 20h // 0x00000001 - fDebugSingle // 0x00000002 - fCreateProcessEvent // 0x00000004 - fExitProcessEvent // 0x00000008 - fWin16Process // 0x00000010 - fDosProcess // 0x00000020 - fConsoleProcess // 0x00000040 - fFileApisAreOem // 0x00000080 - fNukeProcess // 0x00000100 - fServiceProcess // 0x00000800 - fLoginScriptHack DWORD pPSP; // 24h Linear address of PSP? WORD PSPSelector; // 28h WORD MTEIndex; // 2Ah WORD cThreads; // 2Ch WORD cNotTermThreads; // 2Eh WORD un3; // 30h WORD cRing0Threads; // 32h number of ring 0 threads HANDLE HeapHandle; // 34h Heap to allocate handle tables out of // This seems to always be the KERNEL32 heap HTASK W16TDB; // 38h Win16 Task Database selector DWORD MemMapFiles; // 3Ch memory mapped file list (?) PENVIRONMENT_DATABASE pEDB; // 40h Pointer to Environment Database PHANDLE_TABLE pHandleTable; // 44h Pointer to process handle table struct _PROCESS_DATABASE *ParentPDB; // 48h Parent process database PMODREF MODREFlist; // 4Ch Module reference list DWORD ThreadList; // 50h Threads in this process DWORD DebuggeeCB; // 54h Debuggee Context block? DWORD LocalHeapFreeHead; // 58h Head of free list in process heap DWORD InitialRing0ID; // 5Ch CRITICAL_SECTION crst; // 60h DWORD un4[3]; // 78h DWORD pConsole; // 84h Pointer to console for process DWORD tlsInUseBits1; // 88h // Represents TLS indices 0 - 31 DWORD tlsInUseBits2; // 8Ch // Represents TLS indices 32 - 63 DWORD ProcessDWORD; // 90h struct _PROCESS_DATABASE *ProcessGroup; // 94h DWORD pExeMODREF; // 98h pointer to EXE's MODREF DWORD TopExcFilter; // 9Ch Top Exception Filter? DWORD BasePriority; // A0h Base scheduling priority for process DWORD HeapOwnList; // A4h Head of the list of process heaps DWORD HeapHandleBlockList;// A8h Pointer to head of heap handle block list DWORD pSomeHeapPtr; // ACh normally zero, but can a pointer to a // moveable handle block in the heap DWORD pConsoleProvider; // B0h Process that owns the console we're using? WORD EnvironSelector; // B4h Selector containing process environment WORD ErrorMode; // B6H SetErrorMode value (also thunks to Win16) DWORD pevtLoadFinished; // B8h Pointer to event LoadFinished? WORD UTState; // BCh } PROCESS_DATABASE, *PPROCESS_DATABASE; //TIB (Thread Information Block) structure typedef struct _SEH_record { struct _SEH_record *pNext; FARPROC pfnHandler; } SEH_record, *PSEH_record; // This is semi-documented in the NTDDK.H file from the NT DDK typedef struct _TIB { PSEH_record pvExcept; // 00h Head of exception record list PVOID pvStackUserTop; // 04h Top of user stack PVOID pvStackUserBase; // 08h Base of user stack WORD pvTDB; // 0Ch TDB WORD pvThunksSS; // 0Eh SS selector used for thunking to 16 bits DWORD SelmanList; // 10h PVOID pvArbitrary; // 14h Available for application use struct _tib *ptibSelf; // 18h Linear address of TIB structure WORD TIBFlags; // 1Ch WORD Win16MutexCount; // 1Eh DWORD DebugContext; // 20h DWORD pCurrentPriority; // 24h DWORD pvQueue; // 28h Message Queue selector PVOID *pvTLSArray; // 2Ch Thread Local Storage array } TIB, *PTIB; //TDBX structure typedef struct _TDBX { DWORD ptdb; // 00h // PTHREAD_DATABASE DWORD ppdb; // 04h // PPROCESDS_DATABASE DWORD ContextHandle; // 08h DWORD un1; // 0Ch DWORD TimeOutHandle; // 10h DWORD WakeParam; // 14h DWORD BlockHandle; // 18h DWORD BlockState; // 1Ch DWORD SuspendCount; // 20h DWORD SuspendHandle; // 24h DWORD MustCompleteCount; // 28h DWORD WaitExFlags; // 2Ch // 0x00000001 - WAITEXBIT // 0x00000002 - WAITACKBIT // 0x00000004 - SUSPEND_APC_PENDING // 0x00000008 - SUSPEND_TERMINATED // 0x00000010 - BLOCKED_FOR_TERMINATION // 0x00000020 - EMULATE_NPX // 0x00000040 - WIN32_NPX // 0x00000080 - EXTENDED_HANDLES // 0x00000100 - FROZEN // 0x00000200 - DONT_FREEZE // 0x00000400 - DONT_UNFREEZE // 0x00000800 - DONT_TRACE // 0x00001000 - STOP_TRACING // 0x00002000 - WAITING_FOR_CRST_SAFE // 0x00004000 - CRST_SAFE // 0x00040000 - BLOCK_TERMINATE_APC DWORD SyncWaitCount; // 30h DWORD QueuedSyncFuncs; // 34h DWORD UserAPCList; // 38h DWORD KernAPCList; // 3Ch DWORD pPMPSPSelector; // 40h DWORD BlockedOnID; // 44h DWORD un2[7]; // 48h DWORD TraceRefData; // 64h DWORD TraceCallBack; // 68h DWORD TraceEventHandle; // 6Ch WORD TraceOutLastCS; // 70h WORD K16TDB; // 72h WORD K16PDB; // 74h WORD DosPDBSeg; // 76h WORD ExceptionCount; // 78h } TDBX, *PTDBX; //Thread Database structure typedef struct _THREAD_DATABASE { DWORD Type; // 00h DWORD cReference; // 04h PPROCESS_DATABASE pProcess; // 08h DWORD someEvent; // 0Ch An event object (What's it used for???) DWORD pvExcept; // 10h This field through field 3CH is a TIB // structure (see TIB.H) DWORD TopOfStack; // 14h DWORD StackLow; // 18h WORD W16TDB; // 1Ch WORD StackSelector16; // 1Eh Used when thunking down to 16 bits DWORD SelmanList; // 20h DWORD UserPointer; // 24h PTIB pTIB; // 28h WORD TIBFlags; // 2Ch TIBF_WIN32 = 1, TIBF_TRAP = 2 WORD Win16MutexCount; // 2Eh DWORD DebugContext; // 30h PDWORD pCurrentPriority; // 34h DWORD MessageQueue; // 38h DWORD pTLSArray; // 3Ch PPROCESS_DATABASE pProcess2;// 40h Another copy of the thread's process??? DWORD Flags; // 44h // 0x00000001 - fCreateThreadEvent // 0x00000002 - fCancelExceptionAbort // 0x00000004 - fOnTempStack // 0x00000008 - fGrowableStack // 0x00000010 - fDelaySingleStep // 0x00000020 - fOpenExeAsImmovableFile // 0x00000040 - fCreateSuspended // 0x00000080 - fStackOverflow // 0x00000100 - fNestedCleanAPCs // 0x00000200 - fWasOemNowAnsi // 0x00000400 - fOKToSetThreadOem DWORD TerminationStatus; // 48h Returned by GetExitCodeThread WORD TIBSelector; // 4Ch WORD EmulatorSelector; // 4Eh DWORD cHandles; // 50h DWORD WaitNodeList; // 54h DWORD un4; // 58h DWORD Ring0Thread; // 5Ch PTDBX pTDBX; // 60 DWORD StackBase; // 64h DWORD TerminationStack; // 68h DWORD EmulatorData; // 6Ch DWORD GetLastErrorCode; // 70h DWORD DebuggerCB; // 74h DWORD DebuggerThread; // 78h PCONTEXT ThreadContext; // 7Ch // register context defined in WINNT.H DWORD Except16List; // 80h DWORD ThunkConnect; // 84h DWORD NegStackBase; // 88h DWORD CurrentSS; // 8Ch DWORD SSTable; // 90h DWORD ThunkSS16; // 94h DWORD TLSArray[64]; // 98h DWORD DeltaPriority; // 198h // The retail version breaks off somewhere around here. // All the remaining fields are most likely only in the debug version DWORD un5[7]; // 19Ch DWORD pCreateData16; // 1B8h DWORD APISuspendCount; // 1BCh # of times SuspendThread has been called DWORD un6; // 1C0h DWORD WOWChain; // 1C4h WORD wSSBig; // 1C8h WORD un7; // 1CAh DWORD lp16SwitchRec; // 1CCh DWORD un8[6]; // 1D0h DWORD pSomeCritSect1; // 1E8h DWORD pWin16Mutex; // 1ECh DWORD pWin32Mutex; // 1F0h DWORD pSomeCritSect2; // 1F4h DWORD un9; // 1F8h DWORD ripString; // 1FCh DWORD LastTlsSetValueEIP[64]; // 200h (parallel to TlsArray, contains EIP // where TLS value was last set from) } THREAD_DATABASE, *PTHREAD_DATABASE;