/* * Emulator thunks * * Copyright 1996, 1997 Alexandre Julliard * Copyright 1998 Ulrich Weigand */ #include #include "wine/winbase16.h" #include "task.h" #include "hook.h" #include "callback.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 "keyboard.h" #include "debugtools.h" DECLARE_DEBUG_CHANNEL(relay) DECLARE_DEBUG_CHANNEL(system) DECLARE_DEBUG_CHANNEL(thunk) extern LONG CallTo16RegisterShort(const CONTEXT86 *context, INT offset); extern LONG CallTo16RegisterLong(const CONTEXT86 *context, INT offset); /* 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 THUNK_CallTo16_word_ (FARPROC16); extern LONG THUNK_CallTo16_long_ (FARPROC16); extern WORD THUNK_CallTo16_word_w (FARPROC16,WORD); extern WORD THUNK_CallTo16_word_l (FARPROC16,LONG); extern LONG THUNK_CallTo16_long_l (FARPROC16,LONG); extern WORD THUNK_CallTo16_word_ww (FARPROC16,WORD,WORD); extern WORD THUNK_CallTo16_word_wl (FARPROC16,WORD,LONG); extern WORD THUNK_CallTo16_word_ll (FARPROC16,LONG,LONG); extern LONG THUNK_CallTo16_long_ll (FARPROC16,LONG,LONG); extern WORD THUNK_CallTo16_word_www (FARPROC16,WORD,WORD,WORD); extern WORD THUNK_CallTo16_word_wwl (FARPROC16,WORD,WORD,LONG); extern WORD THUNK_CallTo16_word_wlw (FARPROC16,WORD,LONG,WORD); extern LONG THUNK_CallTo16_long_wwl (FARPROC16,WORD,WORD,LONG); extern LONG THUNK_CallTo16_long_lll (FARPROC16,LONG,LONG,LONG); extern WORD THUNK_CallTo16_word_llwl (FARPROC16,LONG,LONG,WORD,LONG); extern WORD THUNK_CallTo16_word_lwll (FARPROC16,LONG,WORD,LONG,LONG); extern WORD THUNK_CallTo16_word_lwww (FARPROC16,LONG,WORD,WORD,WORD); extern WORD THUNK_CallTo16_word_wlww (FARPROC16,WORD,LONG,WORD,WORD); extern WORD THUNK_CallTo16_word_wwll (FARPROC16,WORD,WORD,LONG,LONG); extern WORD THUNK_CallTo16_word_wwwl (FARPROC16,WORD,WORD,WORD,LONG); extern LONG THUNK_CallTo16_long_wwwl (FARPROC16,WORD,WORD,WORD,LONG); extern WORD THUNK_CallTo16_word_llll (FARPROC16,LONG,LONG,LONG,LONG); extern LONG THUNK_CallTo16_long_llll (FARPROC16,LONG,LONG,LONG,LONG); extern WORD THUNK_CallTo16_word_wllwl(FARPROC16,WORD,LONG,LONG,WORD,LONG); extern WORD THUNK_CallTo16_word_lwwww(FARPROC16,LONG,WORD,WORD,WORD,WORD); extern LONG THUNK_CallTo16_long_lwwll(FARPROC16,LONG,WORD,WORD,LONG,LONG); extern WORD THUNK_CallTo16_word_wwlll(FARPROC16,WORD,WORD,LONG,LONG,LONG); extern WORD THUNK_CallTo16_word_wwwww(FARPROC16,WORD,WORD,WORD,WORD,WORD); extern WORD THUNK_CallTo16_word_lwlll(FARPROC16,LONG,WORD,LONG,LONG,LONG); extern LONG THUNK_CallTo16_long_lwlll(FARPROC16,LONG,WORD,LONG,LONG,LONG); extern LONG THUNK_CallTo16_long_lllll(FARPROC16,LONG,LONG,LONG,LONG,LONG); extern LONG THUNK_CallTo16_long_llllll(FARPROC16,LONG,LONG,LONG,LONG,LONG,LONG); extern LONG THUNK_CallTo16_long_lllllll(FARPROC16,LONG,LONG,LONG,LONG,LONG,LONG,LONG); extern WORD THUNK_CallTo16_word_llwwlll(FARPROC16,LONG,LONG,WORD,WORD,LONG,LONG,LONG); extern LONG THUNK_CallTo16_word_lwwlllll(FARPROC16,LONG,WORD,WORD,LONG,LONG, LONG,LONG,LONG); extern LONG THUNK_CallTo16_long_llllllll(FARPROC16,LONG,LONG,LONG,LONG,LONG, LONG,LONG,LONG); extern LONG THUNK_CallTo16_long_lllllllll(FARPROC16,LONG,LONG,LONG,LONG, LONG,LONG,LONG,LONG,LONG); extern LONG THUNK_CallTo16_long_llllllllll(FARPROC16,LONG,LONG,LONG,LONG, LONG,LONG,LONG,LONG,LONG,LONG); extern LONG THUNK_CallTo16_long_lllllllllll(FARPROC16,LONG,LONG,LONG,LONG, LONG,LONG,LONG,LONG,LONG,LONG, LONG); extern LONG THUNK_CallTo16_long_llllllllllll(FARPROC16,LONG,LONG,LONG,LONG, LONG,LONG,LONG,LONG,LONG,LONG, LONG,LONG); extern LONG THUNK_CallTo16_long_lwwllwlllllw(FARPROC16,LONG,WORD,WORD,LONG, LONG,WORD,LONG,LONG,LONG,LONG, LONG,WORD); extern LONG THUNK_CallTo16_long_lllllllllllll(FARPROC16,LONG,LONG,LONG,LONG, LONG,LONG,LONG,LONG,LONG,LONG, LONG,LONG,LONG); extern LONG THUNK_CallTo16_long_llllllllllllll(FARPROC16,LONG,LONG,LONG, LONG,LONG,LONG,LONG,LONG, LONG,LONG,LONG,LONG,LONG, LONG); extern LONG THUNK_CallTo16_word_lwwwwlwwwwllll(FARPROC16,LONG,WORD,WORD, WORD,WORD,LONG,WORD,WORD, WORD,WORD,LONG,LONG,LONG, LONG); extern LONG THUNK_CallTo16_long_lllllllllllllll(FARPROC16,LONG,LONG,LONG, LONG,LONG,LONG,LONG,LONG, LONG,LONG,LONG,LONG,LONG, LONG,LONG); extern LONG THUNK_CallTo16_long_llllllllllllllll(FARPROC16,LONG,LONG,LONG, LONG,LONG,LONG,LONG,LONG, LONG,LONG,LONG,LONG,LONG, LONG,LONG,LONG); extern void THUNK_CallFrom16_p_long_wwwll(); /* ### stop build ### */ typedef void (*RELAY)(); #include "pshpack1.h" typedef struct tagTHUNK { BYTE popl_eax; /* 0x58 popl %eax (return address)*/ BYTE pushl_func; /* 0x68 pushl $proc */ FARPROC proc WINE_PACKED; BYTE pushl_eax; /* 0x50 pushl %eax */ BYTE jmp; /* 0xe9 jmp relay (relative jump)*/ RELAY relay WINE_PACKED; struct tagTHUNK *next WINE_PACKED; } THUNK; #include "poppack.h" #define DECL_THUNK(aname,aproc,arelay) \ THUNK aname; \ aname.popl_eax = 0x58; \ aname.pushl_func = 0x68; \ aname.proc = (FARPROC) (aproc); \ aname.pushl_eax = 0x50; \ aname.jmp = 0xe9; \ aname.relay = (RELAY)((char *)(arelay) - (char *)(&(aname).next)); \ aname.next = NULL; static THUNK *firstThunk = NULL; static LRESULT WINAPI THUNK_CallWndProc16( WNDPROC16 proc, HWND16 hwnd, UINT16 msg, WPARAM16 wParam, LPARAM lParam ); static BOOL WINAPI THUNK_WOWCallback16Ex( FARPROC16,DWORD,DWORD, LPVOID,LPDWORD ); 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_CallFrom16_p_long_wwwll, /* CallFrom16WndProc */ THUNK_CallWndProc16, /* CallWndProc */ (void *)THUNK_CallTo16_long_lwwll, /* CallDriverProc */ (void *)THUNK_CallTo16_word_wwlll, /* CallDriverCallback */ (void *)THUNK_CallTo16_word_wwlll, /* CallTimeFuncProc */ (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_l, /* CallWOWCallbackProc */ THUNK_WOWCallback16Ex, /* CallWOWCallback16Ex */ (void *)THUNK_CallTo16_long_ll, /* CallUTProc */ (void *)THUNK_CallTo16_long_l, /* CallASPIPostProc */ (void *)THUNK_CallTo16_word_lwll, /* CallDrvControlProc */ (void *)THUNK_CallTo16_word_lwlll, /* CallDrvEnableProc */ (void *)THUNK_CallTo16_word_llll, /* CallDrvEnumDFontsProc */ (void *)THUNK_CallTo16_word_lwll, /* CallDrvEnumObjProc */ (void *)THUNK_CallTo16_word_lwwlllll, /* CallDrvOutputProc */ (void *)THUNK_CallTo16_long_lwlll, /* CallDrvRealizeProc */ (void *)THUNK_CallTo16_word_lwwwwlwwwwllll, /* CallDrvStretchBltProc */ (void *)THUNK_CallTo16_long_lwwllwlllllw, /* CallDrvExtTextOutProc */ (void *)THUNK_CallTo16_word_llwwlll, /* CallDrvGetCharWidth */ (void *)THUNK_CallTo16_word_ww /* CallDrvAbortProc */ }; /*********************************************************************** * THUNK_Init */ BOOL THUNK_Init(void) { /* Set the window proc calling functions */ Callbacks = &CALLBACK_EmulatorTable; /* Initialize Thunklets */ return THUNK_ThunkletInit(); } /*********************************************************************** * THUNK_Alloc */ static THUNK *THUNK_Alloc( FARPROC func, RELAY relay ) { 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->next = firstThunk; firstThunk = thunk; } return thunk; } /*********************************************************************** * THUNK_Find */ static THUNK *THUNK_Find( FARPROC func ) { THUNK *thunk = firstThunk; while (thunk && (thunk->proc != func)) thunk = thunk->next; return thunk; } /*********************************************************************** * THUNK_Free */ static void THUNK_Free( THUNK *thunk ) { if (HEAP_IsInsideHeap( GetProcessHeap(), 0, thunk )) { THUNK **prev = &firstThunk; while (*prev && (*prev != thunk)) prev = &(*prev)->next; if (*prev) { *prev = thunk->next; HeapFree( GetProcessHeap(), 0, thunk ); return; } } ERR_(thunk)("invalid thunk addr %p\n", thunk ); } /*********************************************************************** * THUNK_CallWndProc16 * * Call a 16-bit window procedure */ static LRESULT WINAPI THUNK_CallWndProc16( WNDPROC16 proc, HWND16 hwnd, UINT16 msg, WPARAM16 wParam, LPARAM lParam ) { CONTEXT86 context; LRESULT ret; WORD *args; WND *wndPtr = WIN_FindWndPtr( hwnd ); DWORD offset = 0; TEB *teb = NtCurrentTeb(); int iWndsLocks; /* Window procedures want ax = hInstance, ds = es = ss */ memset(&context, '\0', sizeof(context)); DS_reg(&context) = SELECTOROF(teb->cur_stack); ES_reg(&context) = DS_reg(&context); EAX_reg(&context) = wndPtr ? wndPtr->hInstance : DS_reg(&context); CS_reg(&context) = SELECTOROF(proc); EIP_reg(&context) = OFFSETOF(proc); EBP_reg(&context) = OFFSETOF(teb->cur_stack) + (WORD)&((STACK16FRAME*)0)->bp; WIN_ReleaseWndPtr(wndPtr); if (lParam) { /* Some programs (eg. the "Undocumented Windows" examples, JWP) only work if structures passed in lParam are placed in the stack/data segment. Programmers easily make the mistake of converting lParam to a near rather than a far pointer, since Windows apparently allows this. We copy the structures to the 16 bit stack; this is ugly but makes these programs work. */ switch (msg) { case WM_CREATE: case WM_NCCREATE: offset = sizeof(CREATESTRUCT16); break; case WM_DRAWITEM: offset = sizeof(DRAWITEMSTRUCT16); break; case WM_COMPAREITEM: offset = sizeof(COMPAREITEMSTRUCT16); break; } if (offset) { void *s = PTR_SEG_TO_LIN(lParam); lParam = STACK16_PUSH( teb, offset ); memcpy( PTR_SEG_TO_LIN(lParam), s, offset ); } } iWndsLocks = WIN_SuspendWndsLock(); args = (WORD *)THREAD_STACK16(teb) - 5; args[0] = LOWORD(lParam); args[1] = HIWORD(lParam); args[2] = wParam; args[3] = msg; args[4] = hwnd; ret = CallTo16RegisterShort( &context, 5 * sizeof(WORD) ); if (offset) STACK16_POP( teb, offset ); WIN_RestoreWndsLock(iWndsLocks); return ret; } /*********************************************************************** * THUNK_EnumObjects16 (GDI.71) */ INT16 WINAPI THUNK_EnumObjects16( HDC16 hdc, INT16 nObjType, GOBJENUMPROC16 func, LPARAM lParam ) { DECL_THUNK( thunk, func, THUNK_CallTo16_word_ll ); return EnumObjects16( hdc, nObjType, (GOBJENUMPROC16)&thunk, lParam ); } /************************************************************************* * THUNK_EnumFonts16 (GDI.70) */ INT16 WINAPI THUNK_EnumFonts16( HDC16 hdc, LPCSTR lpFaceName, FONTENUMPROC16 func, LPARAM lParam ) { DECL_THUNK( thunk, func, THUNK_CallTo16_word_llwl ); return EnumFonts16( hdc, lpFaceName, (FONTENUMPROC16)&thunk, lParam ); } /****************************************************************** * THUNK_EnumMetaFile16 (GDI.175) */ BOOL16 WINAPI THUNK_EnumMetaFile16( HDC16 hdc, HMETAFILE16 hmf, MFENUMPROC16 func, LPARAM lParam ) { DECL_THUNK( thunk, func, THUNK_CallTo16_word_wllwl ); return EnumMetaFile16( hdc, hmf, (MFENUMPROC16)&thunk, lParam ); } /************************************************************************* * THUNK_EnumFontFamilies16 (GDI.330) */ INT16 WINAPI THUNK_EnumFontFamilies16( HDC16 hdc, LPCSTR lpszFamily, FONTENUMPROC16 func, LPARAM lParam ) { DECL_THUNK( thunk, func, THUNK_CallTo16_word_llwl ); return EnumFontFamilies16(hdc, lpszFamily, (FONTENUMPROC16)&thunk, lParam); } /************************************************************************* * THUNK_EnumFontFamiliesEx16 (GDI.613) */ INT16 WINAPI THUNK_EnumFontFamiliesEx16( HDC16 hdc, LPLOGFONT16 lpLF, FONTENUMPROCEX16 func, LPARAM lParam, DWORD reserved ) { DECL_THUNK( thunk, func, THUNK_CallTo16_word_llwl ); return EnumFontFamiliesEx16( hdc, lpLF, (FONTENUMPROCEX16)&thunk, lParam, reserved ); } /********************************************************************** * THUNK_LineDDA16 (GDI.100) */ void WINAPI THUNK_LineDDA16( INT16 nXStart, INT16 nYStart, INT16 nXEnd, INT16 nYEnd, LINEDDAPROC16 func, LPARAM lParam ) { DECL_THUNK( thunk, func, THUNK_CallTo16_word_wwl ); LineDDA16( nXStart, nYStart, nXEnd, nYEnd, (LINEDDAPROC16)&thunk, lParam ); } /******************************************************************* * THUNK_EnumWindows16 (USER.54) */ BOOL16 WINAPI THUNK_EnumWindows16( WNDENUMPROC16 func, LPARAM lParam ) { DECL_THUNK( thunk, func, THUNK_CallTo16_word_wl ); return EnumWindows16( (WNDENUMPROC16)&thunk, lParam ); } /********************************************************************** * THUNK_EnumChildWindows16 (USER.55) */ BOOL16 WINAPI THUNK_EnumChildWindows16( HWND16 parent, WNDENUMPROC16 func, LPARAM lParam ) { DECL_THUNK( thunk, func, THUNK_CallTo16_word_wl ); return EnumChildWindows16( parent, (WNDENUMPROC16)&thunk, lParam ); } /********************************************************************** * THUNK_EnumTaskWindows16 (USER.225) */ BOOL16 WINAPI THUNK_EnumTaskWindows16( HTASK16 hTask, WNDENUMPROC16 func, LPARAM lParam ) { DECL_THUNK( thunk, func, THUNK_CallTo16_word_wl ); return EnumTaskWindows16( hTask, (WNDENUMPROC16)&thunk, lParam ); } /*********************************************************************** * THUNK_EnumProps16 (USER.27) */ INT16 WINAPI THUNK_EnumProps16( HWND16 hwnd, PROPENUMPROC16 func ) { DECL_THUNK( thunk, func, THUNK_CallTo16_word_wlw ); return EnumProps16( hwnd, (PROPENUMPROC16)&thunk ); } /*********************************************************************** * THUNK_GrayString16 (USER.185) */ BOOL16 WINAPI THUNK_GrayString16( HDC16 hdc, HBRUSH16 hbr, GRAYSTRINGPROC16 func, LPARAM lParam, INT16 cch, INT16 x, INT16 y, INT16 cx, INT16 cy ) { DECL_THUNK( thunk, func, THUNK_CallTo16_word_wlw ); if (!func) return GrayString16( hdc, hbr, NULL, lParam, cch, x, y, cx, cy ); else return GrayString16( hdc, hbr, (GRAYSTRINGPROC16)&thunk, lParam, cch, x, y, cx, cy ); } /*********************************************************************** * THUNK_SetWindowsHook16 (USER.121) */ FARPROC16 WINAPI THUNK_SetWindowsHook16( INT16 id, HOOKPROC16 proc ) { HINSTANCE16 hInst = FarGetOwner16( HIWORD(proc) ); HTASK16 hTask = (id == WH_MSGFILTER) ? GetCurrentTask() : 0; THUNK *thunk = THUNK_Alloc( (FARPROC16)proc, (RELAY)THUNK_CallTo16_long_wwl ); if (!thunk) return 0; return (FARPROC16)SetWindowsHookEx16( id, (HOOKPROC16)thunk, hInst, hTask); } /*********************************************************************** * THUNK_UnhookWindowsHook16 (USER.234) */ BOOL16 WINAPI THUNK_UnhookWindowsHook16( INT16 id, HOOKPROC16 proc ) { BOOL16 ret; THUNK *thunk = THUNK_Find( (FARPROC16)proc ); if (!thunk) return FALSE; ret = UnhookWindowsHook16( id, (HOOKPROC16)thunk ); THUNK_Free( thunk ); return ret; } /*********************************************************************** * THUNK_SetWindowsHookEx16 (USER.291) */ HHOOK WINAPI THUNK_SetWindowsHookEx16( INT16 id, HOOKPROC16 proc, HINSTANCE16 hInst, HTASK16 hTask ) { THUNK *thunk = THUNK_Alloc( (FARPROC16)proc, (RELAY)THUNK_CallTo16_long_wwl ); if (!thunk) return 0; return SetWindowsHookEx16( id, (HOOKPROC16)thunk, hInst, hTask ); } /*********************************************************************** * THUNK_UnhookWindowHookEx16 (USER.292) */ BOOL16 WINAPI THUNK_UnhookWindowsHookEx16( HHOOK hhook ) { THUNK *thunk = (THUNK *)HOOK_GetProc16( hhook ); BOOL16 ret = UnhookWindowsHookEx16( hhook ); if (thunk) THUNK_Free( thunk ); return ret; } static FARPROC16 defDCHookProc = NULL; /*********************************************************************** * THUNK_SetDCHook (GDI.190) */ BOOL16 WINAPI THUNK_SetDCHook( HDC16 hdc, FARPROC16 proc, DWORD dwHookData ) { THUNK *thunk, *oldThunk; if (!defDCHookProc) /* Get DCHook Win16 entry point */ { HMODULE16 hModule = GetModuleHandle16( "USER" ); NE_MODULE *pModule = NE_GetPtr( hModule ); if ( pModule && (pModule->flags & NE_FFLAGS_BUILTIN) ) defDCHookProc = NE_GetEntryPoint( hModule, 362 ); else defDCHookProc = (FARPROC16)-1; } if (!proc) thunk = NULL; else if (proc != defDCHookProc) { thunk = THUNK_Alloc( proc, (RELAY)THUNK_CallTo16_word_wwll ); if (!thunk) return FALSE; } else thunk = (THUNK *)DCHook16; /* Free the previous thunk */ GetDCHook( hdc, (FARPROC16 *)&oldThunk ); if (oldThunk && (oldThunk != (THUNK *)DCHook16)) THUNK_Free( oldThunk ); return SetDCHook( hdc, (FARPROC16)thunk, dwHookData ); } /*********************************************************************** * THUNK_GetDCHook (GDI.191) */ DWORD WINAPI THUNK_GetDCHook( HDC16 hdc, FARPROC16 *phookProc ) { THUNK *thunk = NULL; DWORD ret = GetDCHook( hdc, (FARPROC16 *)&thunk ); if (thunk) { if (thunk == (THUNK *)DCHook16) { /* Note: we can only get here when running built-in USER */ if (!defDCHookProc) /* Get DCHook Win16 entry point */ defDCHookProc = NE_GetEntryPoint(GetModuleHandle16("USER"),362); *phookProc = defDCHookProc; } else *phookProc = thunk->proc; } return ret; } /*********************************************************************** * THUNK_SetTaskSignalProc (KERNEL.38) */ FARPROC16 WINAPI THUNK_SetTaskSignalProc( HTASK16 hTask, FARPROC16 proc ) { THUNK *thunk = THUNK_Alloc( proc, (RELAY)THUNK_CallTo16_word_wwwww ); if ( !thunk ) return NULL; thunk = (THUNK*)SetTaskSignalProc( hTask, (FARPROC16)thunk ); if ( !thunk ) return NULL; proc = thunk->proc; THUNK_Free( thunk ); return proc; } /*********************************************************************** * THUNK_CreateThread16 (KERNEL.441) */ static DWORD CALLBACK THUNK_StartThread16( LPVOID threadArgs ) { FARPROC16 start = ((FARPROC16 *)threadArgs)[0]; DWORD param = ((DWORD *)threadArgs)[1]; HeapFree( GetProcessHeap(), 0, threadArgs ); return THUNK_CallTo16_long_l( start, param ); } HANDLE WINAPI THUNK_CreateThread16( SECURITY_ATTRIBUTES *sa, DWORD stack, FARPROC16 start, SEGPTR param, DWORD flags, LPDWORD id ) { DWORD *threadArgs = HeapAlloc( GetProcessHeap(), 0, 2*sizeof(DWORD) ); if (!threadArgs) return INVALID_HANDLE_VALUE; threadArgs[0] = (DWORD)start; threadArgs[1] = (DWORD)param; return CreateThread( sa, stack, THUNK_StartThread16, threadArgs, flags, id ); } /*********************************************************************** * THUNK_WOWCallback16Ex (WOW32.3)(KERNEL32.55) * Generic thunking routine to call 16 bit functions from 32bit code. * * RETURNS * TRUE if the call was done */ static BOOL WINAPI THUNK_WOWCallback16Ex( FARPROC16 proc, /* [in] 16bit function to call */ DWORD dwFlags, /* [in] flags (WCB_*) */ DWORD cbArgs, /* [in] number of arguments */ LPVOID xargs, /* [in/out] arguments */ LPDWORD pdwret /* [out] return value of the 16bit call */ ) { LPDWORD args = (LPDWORD)xargs; DWORD ret,i; TRACE_(relay)("(%p,0x%08lx,%ld,%p,%p)\n", proc,dwFlags,cbArgs,xargs,pdwret ); if (dwFlags == WCB16_CDECL) { /* swap the arguments */ args = HeapAlloc(GetProcessHeap(),0,cbArgs*sizeof(DWORD)); for (i=0;icur_stack ) + (WORD)&((STACK16FRAME*)0)->bp; AX_reg( &context ) = timer; if ( _ConfirmWin16Lock() ) { FIXME_(system)("Skipping timer %d callback because timer signal " "arrived while we own the Win16Lock!\n", timer ); return; } CallTo16RegisterShort( &context, 0 ); /* FIXME: This does not work if the signal occurs while this thread is currently in 16-bit code. With the current structure of the Wine thunking code, this seems to be hard to fix ... */ } WORD WINAPI WIN16_CreateSystemTimer( WORD rate, FARPROC16 proc ) { THUNK *thunk = THUNK_Alloc( proc, (RELAY)THUNK_CallSystemTimerProc ); WORD timer = CreateSystemTimer( rate, (SYSTEMTIMERPROC)thunk ); if (!timer) THUNK_Free( thunk ); return timer; } /*********************************************************************** * THUNK_InitCallout */ void THUNK_InitCallout(void) { HMODULE hModule; WINE_MODREF *wm; NE_MODULE *pModule; hModule = GetModuleHandleA( "USER32" ); wm = MODULE32_LookupHMODULE( hModule ); if ( wm && !(wm->flags & WINE_MODREF_INTERNAL) ) { #define GETADDR( var, name ) \ *(FARPROC *)&Callout.##var = GetProcAddress( hModule, name ) GETADDR( PeekMessageA, "PeekMessageA" ); GETADDR( PeekMessageW, "PeekMessageW" ); GETADDR( GetMessageA, "GetMessageA" ); GETADDR( GetMessageW, "GetMessageW" ); GETADDR( SendMessageA, "SendMessageA" ); GETADDR( SendMessageW, "SendMessageW" ); GETADDR( PostMessageA, "PostMessageA" ); GETADDR( PostMessageW, "PostMessageW" ); GETADDR( PostThreadMessageA, "PostThreadMessageA" ); GETADDR( PostThreadMessageW, "PostThreadMessageW" ); GETADDR( TranslateMessage, "TranslateMessage" ); GETADDR( DispatchMessageW, "DispatchMessageW" ); GETADDR( DispatchMessageA, "DispatchMessageA" ); GETADDR( RedrawWindow, "RedrawWindow" ); GETADDR( UserSignalProc, "UserSignalProc" ); #undef GETADDR } hModule = GetModuleHandle16( "USER" ); pModule = NE_GetPtr( hModule ); if ( pModule && !(pModule->flags & NE_FFLAGS_BUILTIN) ) { #define GETADDR( var, name, thk ) \ *(FARPROC *)&Callout.##var = (FARPROC) \ THUNK_Alloc( WIN32_GetProcAddress16( hModule, 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( InitApp16, "InitApp", word_w ); GETADDR( InitThreadInput16, "InitThreadInput", word_ww ); GETADDR( UserYield16, "UserYield", word_ ); GETADDR( DestroyIcon32, "DestroyIcon32", word_ww ); #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 (!lstrncmpA(TD->magic, "SL01", 4)) { directionSL = TRUE; TRACE_(thunk)("SL01 thunk %s (%lx) -> %s (%s), Reason: %ld\n", module16, (DWORD)TD, module32, thunkfun32, dwReason); } else if (!lstrncmpA(TD->magic, "LS01", 4)) { directionSL = FALSE; TRACE_(thunk)("LS01 thunk %s (%lx) <- %s (%s), Reason: %ld\n", module16, (DWORD)TD, module32, thunkfun32, dwReason); } else { ERR_(thunk)("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_(thunk)("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) { extern void CallFrom16Thunk(void); LPBYTE stub = PTR_SEG_TO_LIN(EAX_reg(context)), x = stub; WORD cs, ds; GET_CS(cs); GET_DS(ds); /* We produce the following code: * * mov ax, __FLATDS * mov es, ax * movzx ecx, cx * mov edx, es:[ecx + $EDX] * push bp * push edx * call __FLATCS:CallFrom16_t_long_ */ *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++ = 0x66; *x++ = 0x9A; *((DWORD *)x)++ = (DWORD)CallFrom16Thunk; *((WORD *)x)++ = cs; /* Jump to the stub code just created */ IP_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 orginal return address on the stack */ SP_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; extern void CallFrom16Thunk(void); DWORD procAddress = (DWORD)GetProcAddress16(GetModuleHandle16("KERNEL"), 631); WORD cs; GET_CS(cs); if (!td) { ERR_(thunk)("ThunkConnect16 was not called!\n"); return; } TRACE_(thunk)("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 * call __FLATCS:CallFrom16_t_long_ */ *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++ = 0x66; *x++ = 0x9A; *((DWORD *)x)++ = (DWORD)CallFrom16Thunk; *((WORD *)x)++ = cs; /* Jump to the stub code just created */ IP_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 */ SP_reg(context) -= 4; } else { struct ThunkDataSL *td = (struct ThunkDataSL *)EDX_reg(context); DWORD targetNr = CX_reg(context) / 4; struct SLTargetDB *tdb; TRACE_(thunk)("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_(thunk)("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_(thunk)("Call target is %08lx\n", EDX_reg(context)); } else { WORD *stack = PTR_SEG_OFF_TO_LIN(SS_reg(context), SP_reg(context)); DX_reg(context) = HIWORD(td->apiDB[targetNr].errorReturnValue); AX_reg(context) = LOWORD(td->apiDB[targetNr].errorReturnValue); IP_reg(context) = stack[2]; CS_reg(context) = stack[3]; SP_reg(context) += td->apiDB[targetNr].nrArgBytes + 4; ERR_(thunk)("Process %08lx did not ThunkConnect32 %s to %s\n", (DWORD)PROCESS_Current(), td->pszDll32, td->pszDll16); } } } DWORD WINAPI WOW16Call(WORD x,WORD y,WORD z) { int i; DWORD calladdr; FIXME_(thunk)("(0x%04x,0x%04x,%d),calling (",x,y,z); for (i=0;i32 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( NtCurrentTeb(), 12 ); LPWORD stackLin = PTR_SEG_TO_LIN( stackSeg ); SEGPTR glue; stackLin[3] = BP_reg( context ); stackLin[2] = SI_reg( context ); stackLin[1] = DI_reg( context ); stackLin[0] = DS_reg( context ); BP_reg( context ) = OFFSETOF( stackSeg ) + 6; SP_reg( context ) = OFFSETOF( stackSeg ) - 4; GS_reg( context ) = 0; /* Jump to 16-bit relay code */ glue = CBClientRelay16[ stackLin[5] ][ stackLin[4] ]; CS_reg ( context ) = SELECTOROF( glue ); EIP_reg( context ) = OFFSETOF ( glue ); } /*********************************************************************** * CBClientThunkSL (KERNEL.620) */ void WINAPI CBClientThunkSL( CONTEXT86 *context ) { /* Call 32-bit relay code */ extern DWORD WINAPI CALL32_CBClient( FARPROC proc, LPWORD args, DWORD *esi ); 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) */ void WINAPI CBClientThunkSLEx( CONTEXT86 *context ) { /* Call 32-bit relay code */ extern DWORD WINAPI CALL32_CBClientEx( FARPROC proc, LPWORD args, DWORD *esi, INT *nArgs ); 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]; SP_reg( context ) += 16+nArgs; /* Return to caller of CBClient thunklet */ CS_reg ( context ) = stackLin[9]; EIP_reg( context ) = stackLin[8]; }