| /* |
| * Emulator thunks |
| * |
| * Copyright 1996, 1997 Alexandre Julliard |
| * Copyright 1998 Ulrich Weigand |
| */ |
| |
| #include <string.h> |
| #include "wine/winbase16.h" |
| #include "task.h" |
| #include "hook.h" |
| #include "callback.h" |
| #include "builtin16.h" |
| #include "user.h" |
| #include "heap.h" |
| #include "neexe.h" |
| #include "process.h" |
| #include "stackframe.h" |
| #include "win.h" |
| #include "flatthunk.h" |
| #include "mouse.h" |
| #include "selectors.h" |
| #include "keyboard.h" |
| #include "debugtools.h" |
| |
| DEFAULT_DEBUG_CHANNEL(thunk) |
| |
| |
| /* List of the 16-bit callback functions. This list is used */ |
| /* by the build program to generate the file if1632/callto16.S */ |
| |
| /* ### start build ### */ |
| extern WORD CALLBACK THUNK_CallTo16_word_ (FARPROC16); |
| extern WORD CALLBACK THUNK_CallTo16_word_w (FARPROC16,WORD); |
| extern WORD CALLBACK THUNK_CallTo16_word_l (FARPROC16,LONG); |
| extern LONG CALLBACK THUNK_CallTo16_long_l (FARPROC16,LONG); |
| extern WORD CALLBACK THUNK_CallTo16_word_ww (FARPROC16,WORD,WORD); |
| extern LONG CALLBACK THUNK_CallTo16_long_ll (FARPROC16,LONG,LONG); |
| extern WORD CALLBACK THUNK_CallTo16_word_www (FARPROC16,WORD,WORD,WORD); |
| extern WORD CALLBACK THUNK_CallTo16_word_lllw (FARPROC16,LONG,LONG,LONG,WORD); |
| extern WORD CALLBACK THUNK_CallTo16_word_lwww (FARPROC16,LONG,WORD,WORD,WORD); |
| extern WORD CALLBACK THUNK_CallTo16_word_wlww (FARPROC16,WORD,LONG,WORD,WORD); |
| extern WORD CALLBACK THUNK_CallTo16_word_wwwl (FARPROC16,WORD,WORD,WORD,LONG); |
| extern LONG CALLBACK THUNK_CallTo16_long_wwwl (FARPROC16,WORD,WORD,WORD,LONG); |
| extern WORD CALLBACK THUNK_CallTo16_word_lwwww(FARPROC16,LONG,WORD,WORD,WORD,WORD); |
| /* ### stop build ### */ |
| |
| static THUNK *firstThunk = NULL; |
| |
| static BOOL THUNK_ThunkletInit( void ); |
| |
| /* Callbacks function table for the emulator */ |
| static const CALLBACKS_TABLE CALLBACK_EmulatorTable = |
| { |
| (void *)CallTo16RegisterShort, /* CallRegisterShortProc */ |
| (void *)CallTo16RegisterLong, /* CallRegisterLongProc */ |
| (void *)THUNK_CallTo16_word_w, /* CallWindowsExitProc */ |
| (void *)THUNK_CallTo16_word_lwww, /* CallWordBreakProc */ |
| (void *)THUNK_CallTo16_word_ww, /* CallBootAppProc */ |
| (void *)THUNK_CallTo16_word_www, /* CallLoadAppSegProc */ |
| (void *)THUNK_CallTo16_word_www, /* CallLocalNotifyFunc */ |
| (void *)THUNK_CallTo16_word_www, /* CallResourceHandlerProc */ |
| (void *)THUNK_CallTo16_long_ll, /* CallUTProc */ |
| (void *)THUNK_CallTo16_long_l /* CallASPIPostProc */ |
| }; |
| |
| const CALLBACKS_TABLE *Callbacks = &CALLBACK_EmulatorTable; |
| |
| CALLOUT_TABLE Callout = { 0 }; |
| |
| |
| /*********************************************************************** |
| * THUNK_Init |
| */ |
| BOOL THUNK_Init(void) |
| { |
| /* Initialize Thunklets */ |
| return THUNK_ThunkletInit(); |
| } |
| |
| /*********************************************************************** |
| * THUNK_Alloc |
| */ |
| FARPROC THUNK_Alloc( FARPROC16 func, RELAY relay ) |
| { |
| HANDLE16 hSeg; |
| NE_MODULE *pModule; |
| THUNK *thunk; |
| |
| /* NULL maps to NULL */ |
| if ( !func ) return NULL; |
| |
| /* |
| * If we got an 16-bit built-in API entry point, retrieve the Wine |
| * 32-bit handler for that API routine. |
| * |
| * NOTE: For efficiency reasons, we only check whether the selector |
| * of 'func' points to the code segment of a built-in module. |
| * It might be theoretically possible that the offset is such |
| * that 'func' does not point, in fact, to an API entry point. |
| * In this case, however, the pointer is corrupt anyway. |
| */ |
| hSeg = GlobalHandle16( SELECTOROF( func ) ); |
| pModule = NE_GetPtr( FarGetOwner16( hSeg ) ); |
| |
| if ( pModule && (pModule->flags & NE_FFLAGS_BUILTIN) |
| && NE_SEG_TABLE(pModule)[0].hSeg == hSeg ) |
| { |
| FARPROC proc = (FARPROC)((ENTRYPOINT16 *)PTR_SEG_TO_LIN( func ))->target; |
| |
| TRACE( "(%04x:%04x, %p) -> built-in API %p\n", |
| SELECTOROF( func ), OFFSETOF( func ), relay, proc ); |
| return proc; |
| } |
| |
| /* Otherwise, we need to alloc a thunk */ |
| thunk = HeapAlloc( GetProcessHeap(), 0, sizeof(*thunk) ); |
| if (thunk) |
| { |
| thunk->popl_eax = 0x58; |
| thunk->pushl_func = 0x68; |
| thunk->proc = func; |
| thunk->pushl_eax = 0x50; |
| thunk->jmp = 0xe9; |
| thunk->relay = (RELAY)((char *)relay - (char *)(&thunk->next)); |
| thunk->magic = CALLTO16_THUNK_MAGIC; |
| thunk->next = firstThunk; |
| firstThunk = thunk; |
| } |
| |
| TRACE( "(%04x:%04x, %p) -> allocated thunk %p\n", |
| SELECTOROF( func ), OFFSETOF( func ), relay, thunk ); |
| return (FARPROC)thunk; |
| } |
| |
| /*********************************************************************** |
| * THUNK_Free |
| */ |
| void THUNK_Free( FARPROC thunk ) |
| { |
| THUNK *t = (THUNK*)thunk; |
| if ( !t || IsBadReadPtr( t, sizeof(*t) ) |
| || t->magic != CALLTO16_THUNK_MAGIC ) |
| return; |
| |
| if (HEAP_IsInsideHeap( GetProcessHeap(), 0, t )) |
| { |
| THUNK **prev = &firstThunk; |
| while (*prev && (*prev != t)) prev = &(*prev)->next; |
| if (*prev) |
| { |
| *prev = t->next; |
| HeapFree( GetProcessHeap(), 0, t ); |
| return; |
| } |
| } |
| ERR("invalid thunk addr %p\n", thunk ); |
| return; |
| } |
| |
| |
| /*********************************************************************** |
| * THUNK_GetCalloutThunk |
| * |
| * Retrieve API entry point with given name from given module. |
| * If module is builtin, return the 32-bit entry point, otherwise |
| * create a 32->16 thunk to the 16-bit entry point, using the |
| * given relay code. |
| * |
| */ |
| static FARPROC THUNK_GetCalloutThunk( NE_MODULE *pModule, LPSTR name, RELAY relay ) |
| { |
| FARPROC16 proc = WIN32_GetProcAddress16( pModule->self, name ); |
| if ( !proc ) return 0; |
| |
| if ( pModule->flags & NE_FFLAGS_BUILTIN ) |
| return (FARPROC)((ENTRYPOINT16 *)PTR_SEG_TO_LIN( proc ))->target; |
| else |
| return (FARPROC)THUNK_Alloc( proc, relay ); |
| } |
| |
| /*********************************************************************** |
| * THUNK_InitCallout |
| */ |
| void THUNK_InitCallout(void) |
| { |
| HMODULE hModule; |
| NE_MODULE *pModule; |
| |
| hModule = GetModuleHandleA( "USER32" ); |
| if ( hModule ) |
| { |
| #define GETADDR( name ) \ |
| *(FARPROC *)&Callout.##name = GetProcAddress( hModule, #name ) |
| |
| GETADDR( PeekMessageA ); |
| GETADDR( PeekMessageW ); |
| GETADDR( GetMessageA ); |
| GETADDR( GetMessageW ); |
| GETADDR( SendMessageA ); |
| GETADDR( SendMessageW ); |
| GETADDR( PostMessageA ); |
| GETADDR( PostMessageW ); |
| GETADDR( PostThreadMessageA ); |
| GETADDR( PostThreadMessageW ); |
| GETADDR( TranslateMessage ); |
| GETADDR( DispatchMessageW ); |
| GETADDR( DispatchMessageA ); |
| GETADDR( RedrawWindow ); |
| GETADDR( WaitForInputIdle ); |
| GETADDR( MessageBoxA ); |
| GETADDR( MessageBoxW ); |
| #undef GETADDR |
| } |
| |
| pModule = NE_GetPtr( GetModuleHandle16( "USER" ) ); |
| if ( pModule ) |
| { |
| #define GETADDR( var, name, thk ) \ |
| *(FARPROC *)&Callout.##var = THUNK_GetCalloutThunk( pModule, name, \ |
| (RELAY)THUNK_CallTo16_##thk ) |
| |
| GETADDR( PeekMessage16, "PeekMessage", word_lwwww ); |
| GETADDR( GetMessage16, "GetMessage", word_lwww ); |
| GETADDR( SendMessage16, "SendMessage", long_wwwl ); |
| GETADDR( PostMessage16, "PostMessage", word_wwwl ); |
| GETADDR( PostAppMessage16, "PostAppMessage", word_wwwl ); |
| GETADDR( TranslateMessage16, "TranslateMessage", word_l ); |
| GETADDR( DispatchMessage16, "DispatchMessage", long_l ); |
| GETADDR( RedrawWindow16, "RedrawWindow", word_wlww ); |
| GETADDR( FinalUserInit16, "FinalUserInit", word_ ); |
| GETADDR( InitApp16, "InitApp", word_w ); |
| GETADDR( InitThreadInput16, "InitThreadInput", word_ww ); |
| GETADDR( UserYield16, "UserYield", word_ ); |
| GETADDR( DestroyIcon32, "DestroyIcon32", word_ww ); |
| GETADDR( UserSignalProc, "SignalProc32", word_lllw ); |
| |
| #undef GETADDR |
| } |
| } |
| |
| /*********************************************************************** |
| * 16->32 Flat Thunk routines: |
| */ |
| |
| /*********************************************************************** |
| * ThunkConnect16 (KERNEL.651) |
| * Connects a 32bit and a 16bit thunkbuffer. |
| */ |
| UINT WINAPI ThunkConnect16( |
| LPSTR module16, /* [in] name of win16 dll */ |
| LPSTR module32, /* [in] name of win32 dll */ |
| HINSTANCE16 hInst16, /* [in] hInst of win16 dll */ |
| DWORD dwReason, /* [in] initialisation argument */ |
| struct ThunkDataCommon *TD, /* [in/out] thunkbuffer */ |
| LPSTR thunkfun32, /* [in] win32 thunkfunction */ |
| WORD cs /* [in] CS of win16 dll */ |
| ) { |
| BOOL directionSL; |
| |
| if (!strncmp(TD->magic, "SL01", 4)) |
| { |
| directionSL = TRUE; |
| |
| TRACE("SL01 thunk %s (%lx) -> %s (%s), Reason: %ld\n", |
| module16, (DWORD)TD, module32, thunkfun32, dwReason); |
| } |
| else if (!strncmp(TD->magic, "LS01", 4)) |
| { |
| directionSL = FALSE; |
| |
| TRACE("LS01 thunk %s (%lx) <- %s (%s), Reason: %ld\n", |
| module16, (DWORD)TD, module32, thunkfun32, dwReason); |
| } |
| else |
| { |
| ERR("Invalid magic %c%c%c%c\n", |
| TD->magic[0], TD->magic[1], TD->magic[2], TD->magic[3]); |
| return 0; |
| } |
| |
| switch (dwReason) |
| { |
| case DLL_PROCESS_ATTACH: |
| if (directionSL) |
| { |
| struct ThunkDataSL16 *SL16 = (struct ThunkDataSL16 *)TD; |
| struct ThunkDataSL *SL = SL16->fpData; |
| |
| if (SL == NULL) |
| { |
| SL = HeapAlloc(GetProcessHeap(), 0, sizeof(*SL)); |
| |
| SL->common = SL16->common; |
| SL->flags1 = SL16->flags1; |
| SL->flags2 = SL16->flags2; |
| |
| SL->apiDB = PTR_SEG_TO_LIN(SL16->apiDatabase); |
| SL->targetDB = NULL; |
| |
| lstrcpynA(SL->pszDll16, module16, 255); |
| lstrcpynA(SL->pszDll32, module32, 255); |
| |
| /* We should create a SEGPTR to the ThunkDataSL, |
| but since the contents are not in the original format, |
| any access to this by 16-bit code would crash anyway. */ |
| SL16->spData = 0; |
| SL16->fpData = SL; |
| } |
| |
| |
| if (SL->flags2 & 0x80000000) |
| { |
| TRACE("Preloading 32-bit library\n"); |
| LoadLibraryA(module32); |
| } |
| } |
| else |
| { |
| /* nothing to do */ |
| } |
| break; |
| |
| case DLL_PROCESS_DETACH: |
| /* FIXME: cleanup */ |
| break; |
| } |
| |
| return 1; |
| } |
| |
| |
| /*********************************************************************** |
| * C16ThkSL (KERNEL.630) |
| */ |
| |
| void WINAPI C16ThkSL(CONTEXT86 *context) |
| { |
| LPBYTE stub = PTR_SEG_TO_LIN(EAX_reg(context)), x = stub; |
| WORD cs = __get_cs(); |
| WORD ds = __get_ds(); |
| |
| /* We produce the following code: |
| * |
| * mov ax, __FLATDS |
| * mov es, ax |
| * movzx ecx, cx |
| * mov edx, es:[ecx + $EDX] |
| * push bp |
| * push edx |
| * push dx |
| * push edx |
| * call __FLATCS:CallFrom16Thunk |
| */ |
| |
| *x++ = 0xB8; *((WORD *)x)++ = ds; |
| *x++ = 0x8E; *x++ = 0xC0; |
| *x++ = 0x66; *x++ = 0x0F; *x++ = 0xB7; *x++ = 0xC9; |
| *x++ = 0x67; *x++ = 0x66; *x++ = 0x26; *x++ = 0x8B; |
| *x++ = 0x91; *((DWORD *)x)++ = EDX_reg(context); |
| |
| *x++ = 0x55; |
| *x++ = 0x66; *x++ = 0x52; |
| *x++ = 0x52; |
| *x++ = 0x66; *x++ = 0x52; |
| *x++ = 0x66; *x++ = 0x9A; *((DWORD *)x)++ = (DWORD)CallFrom16Thunk; |
| *((WORD *)x)++ = cs; |
| |
| /* Jump to the stub code just created */ |
| EIP_reg(context) = LOWORD(EAX_reg(context)); |
| CS_reg(context) = HIWORD(EAX_reg(context)); |
| |
| /* Since C16ThkSL got called by a jmp, we need to leave the |
| original return address on the stack */ |
| ESP_reg(context) -= 4; |
| } |
| |
| /*********************************************************************** |
| * C16ThkSL01 (KERNEL.631) |
| */ |
| |
| void WINAPI C16ThkSL01(CONTEXT86 *context) |
| { |
| LPBYTE stub = PTR_SEG_TO_LIN(EAX_reg(context)), x = stub; |
| |
| if (stub) |
| { |
| struct ThunkDataSL16 *SL16 = PTR_SEG_TO_LIN(EDX_reg(context)); |
| struct ThunkDataSL *td = SL16->fpData; |
| |
| DWORD procAddress = (DWORD)GetProcAddress16(GetModuleHandle16("KERNEL"), 631); |
| WORD cs = __get_cs(); |
| |
| if (!td) |
| { |
| ERR("ThunkConnect16 was not called!\n"); |
| return; |
| } |
| |
| TRACE("Creating stub for ThunkDataSL %08lx\n", (DWORD)td); |
| |
| |
| /* We produce the following code: |
| * |
| * xor eax, eax |
| * mov edx, $td |
| * call C16ThkSL01 |
| * push bp |
| * push edx |
| * push dx |
| * push edx |
| * call __FLATCS:CallFrom16Thunk |
| */ |
| |
| *x++ = 0x66; *x++ = 0x33; *x++ = 0xC0; |
| *x++ = 0x66; *x++ = 0xBA; *((DWORD *)x)++ = (DWORD)td; |
| *x++ = 0x9A; *((DWORD *)x)++ = procAddress; |
| |
| *x++ = 0x55; |
| *x++ = 0x66; *x++ = 0x52; |
| *x++ = 0x52; |
| *x++ = 0x66; *x++ = 0x52; |
| *x++ = 0x66; *x++ = 0x9A; *((DWORD *)x)++ = (DWORD)CallFrom16Thunk; |
| *((WORD *)x)++ = cs; |
| |
| /* Jump to the stub code just created */ |
| EIP_reg(context) = LOWORD(EAX_reg(context)); |
| CS_reg(context) = HIWORD(EAX_reg(context)); |
| |
| /* Since C16ThkSL01 got called by a jmp, we need to leave the |
| orginal return address on the stack */ |
| ESP_reg(context) -= 4; |
| } |
| else |
| { |
| struct ThunkDataSL *td = (struct ThunkDataSL *)EDX_reg(context); |
| DWORD targetNr = CX_reg(context) / 4; |
| struct SLTargetDB *tdb; |
| |
| TRACE("Process %08lx calling target %ld of ThunkDataSL %08lx\n", |
| (DWORD)PROCESS_Current(), targetNr, (DWORD)td); |
| |
| for (tdb = td->targetDB; tdb; tdb = tdb->next) |
| if (tdb->process == PROCESS_Current()) |
| break; |
| |
| if (!tdb) |
| { |
| TRACE("Loading 32-bit library %s\n", td->pszDll32); |
| LoadLibraryA(td->pszDll32); |
| |
| for (tdb = td->targetDB; tdb; tdb = tdb->next) |
| if (tdb->process == PROCESS_Current()) |
| break; |
| } |
| |
| if (tdb) |
| { |
| EDX_reg(context) = tdb->targetTable[targetNr]; |
| |
| TRACE("Call target is %08lx\n", EDX_reg(context)); |
| } |
| else |
| { |
| WORD *stack = PTR_SEG_OFF_TO_LIN(SS_reg(context), LOWORD(ESP_reg(context))); |
| DX_reg(context) = HIWORD(td->apiDB[targetNr].errorReturnValue); |
| AX_reg(context) = LOWORD(td->apiDB[targetNr].errorReturnValue); |
| EIP_reg(context) = stack[2]; |
| CS_reg(context) = stack[3]; |
| ESP_reg(context) += td->apiDB[targetNr].nrArgBytes + 4; |
| |
| ERR("Process %08lx did not ThunkConnect32 %s to %s\n", |
| (DWORD)PROCESS_Current(), td->pszDll32, td->pszDll16); |
| } |
| } |
| } |
| |
| |
| |
| /*********************************************************************** |
| * 16<->32 Thunklet/Callback API: |
| */ |
| |
| #include "pshpack1.h" |
| typedef struct _THUNKLET |
| { |
| BYTE prefix_target; |
| BYTE pushl_target; |
| DWORD target; |
| |
| BYTE prefix_relay; |
| BYTE pushl_relay; |
| DWORD relay; |
| |
| BYTE jmp_glue; |
| DWORD glue; |
| |
| BYTE type; |
| HINSTANCE16 owner; |
| struct _THUNKLET *next; |
| } THUNKLET; |
| #include "poppack.h" |
| |
| #define THUNKLET_TYPE_LS 1 |
| #define THUNKLET_TYPE_SL 2 |
| |
| static HANDLE ThunkletHeap = 0; |
| static THUNKLET *ThunkletAnchor = NULL; |
| |
| static FARPROC ThunkletSysthunkGlueLS = 0; |
| static SEGPTR ThunkletSysthunkGlueSL = 0; |
| |
| static FARPROC ThunkletCallbackGlueLS = 0; |
| static SEGPTR ThunkletCallbackGlueSL = 0; |
| |
| /*********************************************************************** |
| * THUNK_ThunkletInit |
| */ |
| static BOOL THUNK_ThunkletInit( void ) |
| { |
| LPBYTE thunk; |
| |
| ThunkletHeap = HeapCreate(HEAP_WINE_SEGPTR | HEAP_WINE_CODE16SEG, 0, 0); |
| if (!ThunkletHeap) return FALSE; |
| |
| thunk = HeapAlloc( ThunkletHeap, 0, 5 ); |
| if (!thunk) return FALSE; |
| |
| ThunkletSysthunkGlueLS = (FARPROC)thunk; |
| *thunk++ = 0x58; /* popl eax */ |
| *thunk++ = 0xC3; /* ret */ |
| |
| ThunkletSysthunkGlueSL = HEAP_GetSegptr( ThunkletHeap, 0, thunk ); |
| *thunk++ = 0x66; *thunk++ = 0x58; /* popl eax */ |
| *thunk++ = 0xCB; /* lret */ |
| |
| return TRUE; |
| } |
| |
| /*********************************************************************** |
| * SetThunkletCallbackGlue (KERNEL.560) |
| */ |
| void WINAPI SetThunkletCallbackGlue16( FARPROC glueLS, SEGPTR glueSL ) |
| { |
| ThunkletCallbackGlueLS = glueLS; |
| ThunkletCallbackGlueSL = glueSL; |
| } |
| |
| |
| /*********************************************************************** |
| * THUNK_FindThunklet |
| */ |
| THUNKLET *THUNK_FindThunklet( DWORD target, DWORD relay, |
| DWORD glue, BYTE type ) |
| { |
| THUNKLET *thunk; |
| |
| for (thunk = ThunkletAnchor; thunk; thunk = thunk->next) |
| if ( thunk->type == type |
| && thunk->target == target |
| && thunk->relay == relay |
| && ( type == THUNKLET_TYPE_LS ? |
| ( thunk->glue == glue - (DWORD)&thunk->type ) |
| : ( thunk->glue == glue ) ) ) |
| return thunk; |
| |
| return NULL; |
| } |
| |
| /*********************************************************************** |
| * THUNK_AllocLSThunklet |
| */ |
| FARPROC THUNK_AllocLSThunklet( SEGPTR target, DWORD relay, |
| FARPROC glue, HTASK16 owner ) |
| { |
| THUNKLET *thunk = THUNK_FindThunklet( (DWORD)target, relay, (DWORD)glue, |
| THUNKLET_TYPE_LS ); |
| if (!thunk) |
| { |
| TDB *pTask = (TDB*)GlobalLock16( owner ); |
| |
| if ( !(thunk = HeapAlloc( ThunkletHeap, 0, sizeof(THUNKLET) )) ) |
| return 0; |
| |
| thunk->prefix_target = thunk->prefix_relay = 0x90; |
| thunk->pushl_target = thunk->pushl_relay = 0x68; |
| thunk->jmp_glue = 0xE9; |
| |
| thunk->target = (DWORD)target; |
| thunk->relay = (DWORD)relay; |
| thunk->glue = (DWORD)glue - (DWORD)&thunk->type; |
| |
| thunk->type = THUNKLET_TYPE_LS; |
| thunk->owner = pTask? pTask->hInstance : 0; |
| |
| thunk->next = ThunkletAnchor; |
| ThunkletAnchor = thunk; |
| } |
| |
| return (FARPROC)thunk; |
| } |
| |
| /*********************************************************************** |
| * THUNK_AllocSLThunklet |
| */ |
| SEGPTR THUNK_AllocSLThunklet( FARPROC target, DWORD relay, |
| SEGPTR glue, HTASK16 owner ) |
| { |
| THUNKLET *thunk = THUNK_FindThunklet( (DWORD)target, relay, (DWORD)glue, |
| THUNKLET_TYPE_SL ); |
| if (!thunk) |
| { |
| TDB *pTask = (TDB*)GlobalLock16( owner ); |
| |
| if ( !(thunk = HeapAlloc( ThunkletHeap, 0, sizeof(THUNKLET) )) ) |
| return 0; |
| |
| thunk->prefix_target = thunk->prefix_relay = 0x66; |
| thunk->pushl_target = thunk->pushl_relay = 0x68; |
| thunk->jmp_glue = 0xEA; |
| |
| thunk->target = (DWORD)target; |
| thunk->relay = (DWORD)relay; |
| thunk->glue = (DWORD)glue; |
| |
| thunk->type = THUNKLET_TYPE_SL; |
| thunk->owner = pTask? pTask->hInstance : 0; |
| |
| thunk->next = ThunkletAnchor; |
| ThunkletAnchor = thunk; |
| } |
| |
| return HEAP_GetSegptr( ThunkletHeap, 0, thunk ); |
| } |
| |
| /********************************************************************** |
| * IsLSThunklet |
| */ |
| BOOL16 WINAPI IsLSThunklet( THUNKLET *thunk ) |
| { |
| return thunk->prefix_target == 0x90 && thunk->pushl_target == 0x68 |
| && thunk->prefix_relay == 0x90 && thunk->pushl_relay == 0x68 |
| && thunk->jmp_glue == 0xE9 && thunk->type == THUNKLET_TYPE_LS; |
| } |
| |
| /********************************************************************** |
| * IsSLThunklet (KERNEL.612) |
| */ |
| BOOL16 WINAPI IsSLThunklet16( THUNKLET *thunk ) |
| { |
| return thunk->prefix_target == 0x66 && thunk->pushl_target == 0x68 |
| && thunk->prefix_relay == 0x66 && thunk->pushl_relay == 0x68 |
| && thunk->jmp_glue == 0xEA && thunk->type == THUNKLET_TYPE_SL; |
| } |
| |
| |
| |
| /*********************************************************************** |
| * AllocLSThunkletSysthunk (KERNEL.607) |
| */ |
| FARPROC WINAPI AllocLSThunkletSysthunk16( SEGPTR target, |
| FARPROC relay, DWORD dummy ) |
| { |
| return THUNK_AllocLSThunklet( (SEGPTR)relay, (DWORD)target, |
| ThunkletSysthunkGlueLS, GetCurrentTask() ); |
| } |
| |
| /*********************************************************************** |
| * AllocSLThunkletSysthunk (KERNEL.608) |
| */ |
| SEGPTR WINAPI AllocSLThunkletSysthunk16( FARPROC target, |
| SEGPTR relay, DWORD dummy ) |
| { |
| return THUNK_AllocSLThunklet( (FARPROC)relay, (DWORD)target, |
| ThunkletSysthunkGlueSL, GetCurrentTask() ); |
| } |
| |
| |
| /*********************************************************************** |
| * AllocLSThunkletCallbackEx (KERNEL.567) |
| */ |
| FARPROC WINAPI AllocLSThunkletCallbackEx16( SEGPTR target, |
| DWORD relay, HTASK16 task ) |
| { |
| THUNKLET *thunk = (THUNKLET *)PTR_SEG_TO_LIN( target ); |
| if ( !thunk ) return NULL; |
| |
| if ( IsSLThunklet16( thunk ) && thunk->relay == relay |
| && thunk->glue == (DWORD)ThunkletCallbackGlueSL ) |
| return (FARPROC)thunk->target; |
| |
| return THUNK_AllocLSThunklet( target, relay, |
| ThunkletCallbackGlueLS, task ); |
| } |
| |
| /*********************************************************************** |
| * AllocSLThunkletCallbackEx (KERNEL.568) |
| */ |
| SEGPTR WINAPI AllocSLThunkletCallbackEx16( FARPROC target, |
| DWORD relay, HTASK16 task ) |
| { |
| THUNKLET *thunk = (THUNKLET *)target; |
| if ( !thunk ) return 0; |
| |
| if ( IsLSThunklet( thunk ) && thunk->relay == relay |
| && thunk->glue == (DWORD)ThunkletCallbackGlueLS - (DWORD)&thunk->type ) |
| return (SEGPTR)thunk->target; |
| |
| return THUNK_AllocSLThunklet( target, relay, |
| ThunkletCallbackGlueSL, task ); |
| } |
| |
| /*********************************************************************** |
| * AllocLSThunkletCallback (KERNEL.561) (KERNEL.606) |
| */ |
| FARPROC WINAPI AllocLSThunkletCallback16( SEGPTR target, DWORD relay ) |
| { |
| return AllocLSThunkletCallbackEx16( target, relay, GetCurrentTask() ); |
| } |
| |
| /*********************************************************************** |
| * AllocSLThunkletCallback (KERNEL.562) (KERNEL.605) |
| */ |
| SEGPTR WINAPI AllocSLThunkletCallback16( FARPROC target, DWORD relay ) |
| { |
| return AllocSLThunkletCallbackEx16( target, relay, GetCurrentTask() ); |
| } |
| |
| /*********************************************************************** |
| * FindLSThunkletCallback (KERNEL.563) (KERNEL.609) |
| */ |
| FARPROC WINAPI FindLSThunkletCallback( SEGPTR target, DWORD relay ) |
| { |
| THUNKLET *thunk = (THUNKLET *)PTR_SEG_TO_LIN( target ); |
| if ( thunk && IsSLThunklet16( thunk ) && thunk->relay == relay |
| && thunk->glue == (DWORD)ThunkletCallbackGlueSL ) |
| return (FARPROC)thunk->target; |
| |
| thunk = THUNK_FindThunklet( (DWORD)target, relay, |
| (DWORD)ThunkletCallbackGlueLS, |
| THUNKLET_TYPE_LS ); |
| return (FARPROC)thunk; |
| } |
| |
| /*********************************************************************** |
| * FindSLThunkletCallback (KERNEL.564) (KERNEL.610) |
| */ |
| SEGPTR WINAPI FindSLThunkletCallback( FARPROC target, DWORD relay ) |
| { |
| THUNKLET *thunk = (THUNKLET *)target; |
| if ( thunk && IsLSThunklet( thunk ) && thunk->relay == relay |
| && thunk->glue == (DWORD)ThunkletCallbackGlueLS - (DWORD)&thunk->type ) |
| return (SEGPTR)thunk->target; |
| |
| thunk = THUNK_FindThunklet( (DWORD)target, relay, |
| (DWORD)ThunkletCallbackGlueSL, |
| THUNKLET_TYPE_SL ); |
| return HEAP_GetSegptr( ThunkletHeap, 0, thunk ); |
| } |
| |
| |
| /*********************************************************************** |
| * FreeThunklet16 (KERNEL.611) |
| */ |
| BOOL16 WINAPI FreeThunklet16( DWORD unused1, DWORD unused2 ) |
| { |
| return FALSE; |
| } |
| |
| /*********************************************************************** |
| * Callback Client API |
| */ |
| |
| #define N_CBC_FIXED 20 |
| #define N_CBC_VARIABLE 10 |
| #define N_CBC_TOTAL (N_CBC_FIXED + N_CBC_VARIABLE) |
| |
| static SEGPTR CBClientRelay16[ N_CBC_TOTAL ]; |
| static FARPROC *CBClientRelay32[ N_CBC_TOTAL ]; |
| |
| /*********************************************************************** |
| * RegisterCBClient (KERNEL.619) |
| */ |
| INT16 WINAPI RegisterCBClient16( INT16 wCBCId, |
| SEGPTR relay16, FARPROC *relay32 ) |
| { |
| /* Search for free Callback ID */ |
| if ( wCBCId == -1 ) |
| for ( wCBCId = N_CBC_FIXED; wCBCId < N_CBC_TOTAL; wCBCId++ ) |
| if ( !CBClientRelay16[ wCBCId ] ) |
| break; |
| |
| /* Register Callback ID */ |
| if ( wCBCId > 0 && wCBCId < N_CBC_TOTAL ) |
| { |
| CBClientRelay16[ wCBCId ] = relay16; |
| CBClientRelay32[ wCBCId ] = relay32; |
| } |
| else |
| wCBCId = 0; |
| |
| return wCBCId; |
| } |
| |
| /*********************************************************************** |
| * UnRegisterCBClient (KERNEL.622) |
| */ |
| INT16 WINAPI UnRegisterCBClient16( INT16 wCBCId, |
| SEGPTR relay16, FARPROC *relay32 ) |
| { |
| if ( wCBCId >= N_CBC_FIXED && wCBCId < N_CBC_TOTAL |
| && CBClientRelay16[ wCBCId ] == relay16 |
| && CBClientRelay32[ wCBCId ] == relay32 ) |
| { |
| CBClientRelay16[ wCBCId ] = 0; |
| CBClientRelay32[ wCBCId ] = 0; |
| } |
| else |
| wCBCId = 0; |
| |
| return wCBCId; |
| } |
| |
| |
| /*********************************************************************** |
| * InitCBClient (KERNEL.623) |
| */ |
| void WINAPI InitCBClient16( FARPROC glueLS ) |
| { |
| HMODULE16 kernel = GetModuleHandle16( "KERNEL" ); |
| SEGPTR glueSL = (SEGPTR)WIN32_GetProcAddress16( kernel, (LPCSTR)604 ); |
| |
| SetThunkletCallbackGlue16( glueLS, glueSL ); |
| } |
| |
| /*********************************************************************** |
| * CBClientGlueSL (KERNEL.604) |
| */ |
| void WINAPI CBClientGlueSL( CONTEXT86 *context ) |
| { |
| /* Create stack frame */ |
| SEGPTR stackSeg = stack16_push( 12 ); |
| LPWORD stackLin = PTR_SEG_TO_LIN( stackSeg ); |
| SEGPTR glue, *glueTab; |
| |
| stackLin[3] = BP_reg( context ); |
| stackLin[2] = SI_reg( context ); |
| stackLin[1] = DI_reg( context ); |
| stackLin[0] = DS_reg( context ); |
| |
| EBP_reg( context ) = OFFSETOF( stackSeg ) + 6; |
| ESP_reg( context ) = OFFSETOF( stackSeg ) - 4; |
| GS_reg( context ) = 0; |
| |
| /* Jump to 16-bit relay code */ |
| glueTab = PTR_SEG_TO_LIN( CBClientRelay16[ stackLin[5] ] ); |
| glue = glueTab[ stackLin[4] ]; |
| CS_reg ( context ) = SELECTOROF( glue ); |
| EIP_reg( context ) = OFFSETOF ( glue ); |
| } |
| |
| /*********************************************************************** |
| * CBClientThunkSL (KERNEL.620) |
| */ |
| extern DWORD CALL32_CBClient( FARPROC proc, LPWORD args, DWORD *esi ); |
| void WINAPI CBClientThunkSL( CONTEXT86 *context ) |
| { |
| /* Call 32-bit relay code */ |
| |
| LPWORD args = PTR_SEG_OFF_TO_LIN( SS_reg( context ), BP_reg( context ) ); |
| FARPROC proc = CBClientRelay32[ args[2] ][ args[1] ]; |
| |
| EAX_reg(context) = CALL32_CBClient( proc, args, &ESI_reg( context ) ); |
| } |
| |
| /*********************************************************************** |
| * CBClientThunkSLEx (KERNEL.621) |
| */ |
| extern DWORD CALL32_CBClientEx( FARPROC proc, LPWORD args, DWORD *esi, INT *nArgs ); |
| void WINAPI CBClientThunkSLEx( CONTEXT86 *context ) |
| { |
| /* Call 32-bit relay code */ |
| |
| LPWORD args = PTR_SEG_OFF_TO_LIN( SS_reg( context ), BP_reg( context ) ); |
| FARPROC proc = CBClientRelay32[ args[2] ][ args[1] ]; |
| INT nArgs; |
| LPWORD stackLin; |
| |
| EAX_reg(context) = CALL32_CBClientEx( proc, args, &ESI_reg( context ), &nArgs ); |
| |
| /* Restore registers saved by CBClientGlueSL */ |
| stackLin = (LPWORD)((LPBYTE)CURRENT_STACK16 + sizeof(STACK16FRAME) - 4); |
| BP_reg( context ) = stackLin[3]; |
| SI_reg( context ) = stackLin[2]; |
| DI_reg( context ) = stackLin[1]; |
| DS_reg( context ) = stackLin[0]; |
| ESP_reg( context ) += 16+nArgs; |
| |
| /* Return to caller of CBClient thunklet */ |
| CS_reg ( context ) = stackLin[9]; |
| EIP_reg( context ) = stackLin[8]; |
| } |
| |
