if1632/thunk.c

   1 /*
   2  * Emulator thunks
   3  *
   4  * Copyright 1996, 1997 Alexandre Julliard
   5  * Copyright 1998       Ulrich Weigand
   6  */
   7
   8 #include <string.h>
   9 #include "wine/winbase16.h"
  10 #include "wine/winuser16.h"
  11 #include "hook.h"
  12 #include "callback.h"
  13 #include "task.h"
  14 #include "user.h"
  15 #include "heap.h"
  16 #include "module.h"
  17 #include "process.h"
  18 #include "stackframe.h"
  19 #include "selectors.h"
  20 #include "syslevel.h"
  21 #include "task.h"
  22 #include "except.h"
  23 #include "win.h"
  24 #include "flatthunk.h"
  25 #include "mouse.h"
  26 #include "keyboard.h"
  27 #include "debug.h"
  28
  29 DECLARE_DEBUG_CHANNEL(relay)
  30 DECLARE_DEBUG_CHANNEL(system)
  31 DECLARE_DEBUG_CHANNEL(thunk)
  32
  33
  34 /* List of the 16-bit callback functions. This list is used  */
  35 /* by the build program to generate the file if1632/callto16.S */
  36
  37 /* ### start build ### */
  38 extern LONG CALLBACK CallTo16_sreg_(const CONTEXT *context, INT offset);
  39 extern LONG CALLBACK CallTo16_lreg_(const CONTEXT *context, INT offset);
  40 extern WORD CALLBACK CallTo16_word_     (FARPROC16);
  41 extern LONG CALLBACK CallTo16_long_     (FARPROC16);
  42 extern WORD CALLBACK CallTo16_word_w    (FARPROC16,WORD);
  43 extern WORD CALLBACK CallTo16_word_l    (FARPROC16,LONG);
  44 extern LONG CALLBACK CallTo16_long_l    (FARPROC16,LONG);
  45 extern WORD CALLBACK CallTo16_word_ww   (FARPROC16,WORD,WORD);
  46 extern WORD CALLBACK CallTo16_word_wl   (FARPROC16,WORD,LONG);
  47 extern WORD CALLBACK CallTo16_word_ll   (FARPROC16,LONG,LONG);
  48 extern LONG CALLBACK CallTo16_long_ll   (FARPROC16,LONG,LONG);
  49 extern WORD CALLBACK CallTo16_word_www  (FARPROC16,WORD,WORD,WORD);
  50 extern WORD CALLBACK CallTo16_word_wwl  (FARPROC16,WORD,WORD,LONG);
  51 extern WORD CALLBACK CallTo16_word_wlw  (FARPROC16,WORD,LONG,WORD);
  52 extern LONG CALLBACK CallTo16_long_wwl  (FARPROC16,WORD,WORD,LONG);
  53 extern LONG CALLBACK CallTo16_long_lll  (FARPROC16,LONG,LONG,LONG);
  54 extern WORD CALLBACK CallTo16_word_llwl (FARPROC16,LONG,LONG,WORD,LONG);
  55 extern WORD CALLBACK CallTo16_word_lwll (FARPROC16,LONG,WORD,LONG,LONG);
  56 extern WORD CALLBACK CallTo16_word_lwww (FARPROC16,LONG,WORD,WORD,WORD);
  57 extern WORD CALLBACK CallTo16_word_wlww (FARPROC16,WORD,LONG,WORD,WORD);
  58 extern WORD CALLBACK CallTo16_word_wwll (FARPROC16,WORD,WORD,LONG,LONG);
  59 extern WORD CALLBACK CallTo16_word_wwwl (FARPROC16,WORD,WORD,WORD,LONG);
  60 extern LONG CALLBACK CallTo16_long_wwwl (FARPROC16,WORD,WORD,WORD,LONG);
  61 extern WORD CALLBACK CallTo16_word_llll (FARPROC16,LONG,LONG,LONG,LONG);
  62 extern LONG CALLBACK CallTo16_long_llll (FARPROC16,LONG,LONG,LONG,LONG);
  63 extern WORD CALLBACK CallTo16_word_wllwl(FARPROC16,WORD,LONG,LONG,WORD,LONG);
  64 extern WORD CALLBACK CallTo16_word_lwwww(FARPROC16,LONG,WORD,WORD,WORD,WORD);
  65 extern LONG CALLBACK CallTo16_long_lwwll(FARPROC16,LONG,WORD,WORD,LONG,LONG);
  66 extern WORD CALLBACK CallTo16_word_wwlll(FARPROC16,WORD,WORD,LONG,LONG,LONG);
  67 extern WORD CALLBACK CallTo16_word_wwwww(FARPROC16,WORD,WORD,WORD,WORD,WORD);
  68 extern WORD CALLBACK CallTo16_word_lwlll(FARPROC16,LONG,WORD,LONG,LONG,LONG);
  69 extern LONG CALLBACK CallTo16_long_lwlll(FARPROC16,LONG,WORD,LONG,LONG,LONG);
  70 extern LONG CALLBACK CallTo16_long_lllll(FARPROC16,LONG,LONG,LONG,LONG,LONG);
  71 extern LONG CALLBACK CallTo16_long_llllll(FARPROC16,LONG,LONG,LONG,LONG,LONG,
  72                                           LONG);
  73 extern LONG CALLBACK CallTo16_long_lllllll(FARPROC16,LONG,LONG,LONG,LONG,LONG,
  74                                            LONG,LONG);
  75 extern WORD CALLBACK CallTo16_word_llwwlll(FARPROC16,LONG,LONG,WORD,WORD,LONG,
  76                                            LONG,LONG);
  77 extern LONG CALLBACK CallTo16_word_lwwlllll(FARPROC16,LONG,WORD,WORD,LONG,LONG,
  78                                             LONG,LONG,LONG);
  79 extern LONG CALLBACK CallTo16_long_llllllll(FARPROC16,LONG,LONG,LONG,LONG,LONG,
  80                                             LONG,LONG,LONG);
  81 extern LONG CALLBACK CallTo16_long_lllllllll(FARPROC16,LONG,LONG,LONG,LONG,
  82                                              LONG,LONG,LONG,LONG,LONG);
  83 extern LONG CALLBACK CallTo16_long_llllllllll(FARPROC16,LONG,LONG,LONG,LONG,
  84                                               LONG,LONG,LONG,LONG,LONG,LONG);
  85 extern LONG CALLBACK CallTo16_long_lllllllllll(FARPROC16,LONG,LONG,LONG,LONG,
  86                                                LONG,LONG,LONG,LONG,LONG,LONG,
  87                                                LONG);
  88 extern LONG CALLBACK CallTo16_long_llllllllllll(FARPROC16,LONG,LONG,LONG,LONG,
  89                                                 LONG,LONG,LONG,LONG,LONG,LONG,
  90                                                 LONG,LONG);
  91 extern LONG CALLBACK CallTo16_long_lwwllwlllllw(FARPROC16,LONG,WORD,WORD,LONG,
  92                                                 LONG,WORD,LONG,LONG,LONG,LONG,
  93                                                 LONG,WORD);
  94 extern LONG CALLBACK CallTo16_long_lllllllllllll(FARPROC16,LONG,LONG,LONG,LONG,
  95                                                  LONG,LONG,LONG,LONG,LONG,LONG,
  96                                                  LONG,LONG,LONG);
  97 extern LONG CALLBACK CallTo16_long_llllllllllllll(FARPROC16,LONG,LONG,LONG,
  98                                                   LONG,LONG,LONG,LONG,LONG,
  99                                                   LONG,LONG,LONG,LONG,LONG,
 100                                                   LONG);
 101 extern LONG CALLBACK CallTo16_word_lwwwwlwwwwllll(FARPROC16,LONG,WORD,WORD,
 102                                                   WORD,WORD,LONG,WORD,WORD,
 103                                                   WORD,WORD,LONG,LONG,LONG,
 104                                                   LONG);
 105 extern LONG CALLBACK CallTo16_long_lllllllllllllll(FARPROC16,LONG,LONG,LONG,
 106                                                    LONG,LONG,LONG,LONG,LONG,
 107                                                    LONG,LONG,LONG,LONG,LONG,
 108                                                    LONG,LONG);
 109 extern LONG CALLBACK CallTo16_long_llllllllllllllll(FARPROC16,LONG,LONG,LONG,
 110                                                     LONG,LONG,LONG,LONG,LONG,
 111                                                     LONG,LONG,LONG,LONG,LONG,
 112                                                     LONG,LONG,LONG);
 113 /* ### stop build ### */
 114
 115
 116 typedef void (*RELAY)();
 117
 118 #pragma pack(1)
 119
 120 typedef struct tagTHUNK
 121 {
 122     BYTE             popl_eax;           /* 0x58  popl  %eax (return address)*/
 123     BYTE             pushl_func;         /* 0x68  pushl $proc */
 124     FARPROC        proc WINE_PACKED;
 125     BYTE             pushl_eax;          /* 0x50  pushl %eax */
 126     BYTE             jmp;                /* 0xe9  jmp   relay (relative jump)*/
 127     RELAY            relay WINE_PACKED;
 128     struct tagTHUNK *next WINE_PACKED;
 129 } THUNK;
 130
 131 #pragma pack(4)
 132
 133 #define DECL_THUNK(name,proc,relay) \
 134     THUNK name = { 0x58, 0x68, (FARPROC)(proc), 0x50, 0xe9, \
 135                    (RELAY)((char *)(relay) - (char *)(&(name).next)), NULL }
 136
 137
 138 static THUNK *firstThunk = NULL;
 139
 140 static LRESULT WINAPI THUNK_CallWndProc16( WNDPROC16 proc, HWND16 hwnd,
 141                                            UINT16 msg, WPARAM16 wParam,
 142                                            LPARAM lParam );
 143 static BOOL WINAPI THUNK_CallTaskReschedule(void);
 144 static BOOL WINAPI THUNK_WOWCallback16Ex( FARPROC16,DWORD,DWORD,
 145                                             LPVOID,LPDWORD );
 146
 147 /* TASK_Reschedule() 16-bit entry point */
 148 static FARPROC16 TASK_RescheduleProc;
 149
 150 static BOOL THUNK_ThunkletInit( void );
 151
 152 extern void CallFrom16_p_long_wwwll(void);
 153
 154 /* Callbacks function table for the emulator */
 155 static const CALLBACKS_TABLE CALLBACK_EmulatorTable =
 156 {
 157     (void *)CallTo16_sreg_,                /* CallRegisterShortProc */
 158     (void *)CallTo16_lreg_,                /* CallRegisterLongProc */
 159     THUNK_CallTaskReschedule,              /* CallTaskRescheduleProc */
 160     (void*)CallFrom16_p_long_wwwll,        /* CallFrom16WndProc */
 161     THUNK_CallWndProc16,                   /* CallWndProc */
 162     (void *)CallTo16_long_lwwll,           /* CallDriverProc */
 163     (void *)CallTo16_word_wwlll,           /* CallDriverCallback */
 164     (void *)CallTo16_word_wwlll,           /* CallTimeFuncProc */
 165     (void *)CallTo16_word_w,               /* CallWindowsExitProc */
 166     (void *)CallTo16_word_lwww,            /* CallWordBreakProc */
 167     (void *)CallTo16_word_ww,              /* CallBootAppProc */
 168     (void *)CallTo16_word_www,             /* CallLoadAppSegProc */
 169     (void *)CallTo16_word_www,             /* CallLocalNotifyFunc */
 170     (void *)CallTo16_word_www,             /* CallResourceHandlerProc */
 171     (void *)CallTo16_long_l,               /* CallWOWCallbackProc */
 172     THUNK_WOWCallback16Ex,                 /* CallWOWCallback16Ex */
 173     (void *)CallTo16_long_ll,              /* CallUTProc */
 174     (void *)CallTo16_long_l,               /* CallASPIPostProc */
 175     (void *)CallTo16_word_lwll,            /* CallDrvControlProc */
 176     (void *)CallTo16_word_lwlll,           /* CallDrvEnableProc */
 177     (void *)CallTo16_word_llll,            /* CallDrvEnumDFontsProc */
 178     (void *)CallTo16_word_lwll,            /* CallDrvEnumObjProc */
 179     (void *)CallTo16_word_lwwlllll,        /* CallDrvOutputProc */
 180     (void *)CallTo16_long_lwlll,           /* CallDrvRealizeProc */
 181     (void *)CallTo16_word_lwwwwlwwwwllll,  /* CallDrvStretchBltProc */
 182     (void *)CallTo16_long_lwwllwlllllw,    /* CallDrvExtTextOutProc */
 183     (void *)CallTo16_word_llwwlll,         /* CallDrvGetCharWidth */
 184     (void *)CallTo16_word_ww               /* CallDrvAbortProc */
 185 };
 186
 187
 188 /***********************************************************************
 189  *           THUNK_Init
 190  */
 191 BOOL THUNK_Init(void)
 192 {
 193     /* Set the window proc calling functions */
 194     Callbacks = &CALLBACK_EmulatorTable;
 195     /* Get the 16-bit reschedule function pointer */
 196     TASK_RescheduleProc = MODULE_GetWndProcEntry16( "TASK_Reschedule" );
 197     /* Initialize Thunklets */
 198     return THUNK_ThunkletInit();
 199 }
 200
 201 /***********************************************************************
 202  *           THUNK_Alloc
 203  */
 204 static THUNK *THUNK_Alloc( FARPROC func, RELAY relay )
 205 {
 206     THUNK *thunk = HeapAlloc( GetProcessHeap(), 0, sizeof(*thunk) );
 207     if (thunk)
 208     {
 209         thunk->popl_eax   = 0x58;
 210         thunk->pushl_func = 0x68;
 211         thunk->proc       = func;
 212         thunk->pushl_eax  = 0x50;
 213         thunk->jmp        = 0xe9;
 214         thunk->relay      = (RELAY)((char *)relay - (char *)(&thunk->next));
 215         thunk->next       = firstThunk;
 216         firstThunk = thunk;
 217     }
 218     return thunk;
 219 }
 220
 221
 222 /***********************************************************************
 223  *           THUNK_Find
 224  */
 225 static THUNK *THUNK_Find( FARPROC func )
 226 {
 227     THUNK *thunk = firstThunk;
 228     while (thunk && (thunk->proc != func)) thunk = thunk->next;
 229     return thunk;
 230 }
 231
 232
 233 /***********************************************************************
 234  *           THUNK_Free
 235  */
 236 static void THUNK_Free( THUNK *thunk )
 237 {
 238     if (HEAP_IsInsideHeap( GetProcessHeap(), 0, thunk ))
 239     {
 240         THUNK **prev = &firstThunk;
 241         while (*prev && (*prev != thunk)) prev = &(*prev)->next;
 242         if (*prev)
 243         {
 244             *prev = thunk->next;
 245             HeapFree( GetProcessHeap(), 0, thunk );
 246             return;
 247         }
 248     }
 249     ERR(thunk, "invalid thunk addr %p\n", thunk );
 250 }
 251
 252
 253 /***********************************************************************
 254  *           THUNK_CallWndProc16
 255  *
 256  * Call a 16-bit window procedure
 257  */
 258 static LRESULT WINAPI THUNK_CallWndProc16( WNDPROC16 proc, HWND16 hwnd,
 259                                            UINT16 msg, WPARAM16 wParam,
 260                                            LPARAM lParam )
 261 {
 262     CONTEXT context;
 263     LRESULT ret;
 264     WORD *args;
 265     WND *wndPtr = WIN_FindWndPtr( hwnd );
 266     DWORD offset = 0;
 267     THDB *thdb = THREAD_Current();
 268
 269     /* Window procedures want ax = hInstance, ds = es = ss */
 270
 271     memset(&context, '\0', sizeof(context));
 272     DS_reg(&context)  = SELECTOROF(thdb->cur_stack);
 273     ES_reg(&context)  = DS_reg(&context);
 274     EAX_reg(&context) = wndPtr ? wndPtr->hInstance : DS_reg(&context);
 275     CS_reg(&context)  = SELECTOROF(proc);
 276     EIP_reg(&context) = OFFSETOF(proc);
 277     EBP_reg(&context) = OFFSETOF(thdb->cur_stack)
 278                         + (WORD)&((STACK16FRAME*)0)->bp;
 279
 280     WIN_ReleaseWndPtr(wndPtr);
 281
 282     if (lParam)
 283     {
 284         /* Some programs (eg. the "Undocumented Windows" examples, JWP) only
 285            work if structures passed in lParam are placed in the stack/data
 286            segment. Programmers easily make the mistake of converting lParam
 287            to a near rather than a far pointer, since Windows apparently
 288            allows this. We copy the structures to the 16 bit stack; this is
 289            ugly but makes these programs work. */
 290         switch (msg)
 291         {
 292           case WM_CREATE:
 293           case WM_NCCREATE:
 294             offset = sizeof(CREATESTRUCT16); break;
 295           case WM_DRAWITEM:
 296             offset = sizeof(DRAWITEMSTRUCT16); break;
 297           case WM_COMPAREITEM:
 298             offset = sizeof(COMPAREITEMSTRUCT16); break;
 299         }
 300         if (offset)
 301         {
 302             void *s = PTR_SEG_TO_LIN(lParam);
 303             lParam = STACK16_PUSH( thdb, offset );
 304             memcpy( PTR_SEG_TO_LIN(lParam), s, offset );
 305         }
 306     }
 307
 308     args = (WORD *)THREAD_STACK16(thdb) - 5;
 309     args[0] = LOWORD(lParam);
 310     args[1] = HIWORD(lParam);
 311     args[2] = wParam;
 312     args[3] = msg;
 313     args[4] = hwnd;
 314
 315     ret = CallTo16_sreg_( &context, 5 * sizeof(WORD) );
 316     if (offset) STACK16_POP( thdb, offset );
 317     return ret;
 318 }
 319
 320
 321 /***********************************************************************
 322  *           THUNK_CallTaskReschedule
 323  */
 324 static BOOL WINAPI THUNK_CallTaskReschedule(void)
 325 {
 326     return CallTo16_word_(TASK_RescheduleProc);
 327 }
 328
 329
 330 /***********************************************************************
 331  *           THUNK_EnumObjects16   (GDI.71)
 332  */
 333 INT16 WINAPI THUNK_EnumObjects16( HDC16 hdc, INT16 nObjType,
 334                                   GOBJENUMPROC16 func, LPARAM lParam )
 335 {
 336     DECL_THUNK( thunk, func, CallTo16_word_ll );
 337     return EnumObjects16( hdc, nObjType, (GOBJENUMPROC16)&thunk, lParam );
 338 }
 339
 340
 341 /*************************************************************************
 342  *           THUNK_EnumFonts16   (GDI.70)
 343  */
 344 INT16 WINAPI THUNK_EnumFonts16( HDC16 hdc, LPCSTR lpFaceName,
 345                                 FONTENUMPROC16 func, LPARAM lParam )
 346 {
 347     DECL_THUNK( thunk, func, CallTo16_word_llwl );
 348     return EnumFonts16( hdc, lpFaceName, (FONTENUMPROC16)&thunk, lParam );
 349 }
 350
 351 /******************************************************************
 352  *           THUNK_EnumMetaFile16   (GDI.175)
 353  */
 354 BOOL16 WINAPI THUNK_EnumMetaFile16( HDC16 hdc, HMETAFILE16 hmf,
 355                                     MFENUMPROC16 func, LPARAM lParam )
 356 {
 357     DECL_THUNK( thunk, func, CallTo16_word_wllwl );
 358     return EnumMetaFile16( hdc, hmf, (MFENUMPROC16)&thunk, lParam );
 359 }
 360
 361
 362 /*************************************************************************
 363  *           THUNK_EnumFontFamilies16   (GDI.330)
 364  */
 365 INT16 WINAPI THUNK_EnumFontFamilies16( HDC16 hdc, LPCSTR lpszFamily,
 366                                        FONTENUMPROC16 func, LPARAM lParam )
 367 {
 368     DECL_THUNK( thunk, func, CallTo16_word_llwl );
 369     return EnumFontFamilies16(hdc, lpszFamily, (FONTENUMPROC16)&thunk, lParam);
 370 }
 371
 372
 373 /*************************************************************************
 374  *           THUNK_EnumFontFamiliesEx16   (GDI.613)
 375  */
 376 INT16 WINAPI THUNK_EnumFontFamiliesEx16( HDC16 hdc, LPLOGFONT16 lpLF,
 377                                          FONTENUMPROCEX16 func, LPARAM lParam,
 378                                          DWORD reserved )
 379 {
 380     DECL_THUNK( thunk, func, CallTo16_word_llwl );
 381     return EnumFontFamiliesEx16( hdc, lpLF, (FONTENUMPROCEX16)&thunk,
 382                                  lParam, reserved );
 383 }
 384
 385
 386 /**********************************************************************
 387  *           THUNK_LineDDA16   (GDI.100)
 388  */
 389 void WINAPI THUNK_LineDDA16( INT16 nXStart, INT16 nYStart, INT16 nXEnd,
 390                              INT16 nYEnd, LINEDDAPROC16 func, LPARAM lParam )
 391 {
 392     DECL_THUNK( thunk, func, CallTo16_word_wwl );
 393     LineDDA16( nXStart, nYStart, nXEnd, nYEnd, (LINEDDAPROC16)&thunk, lParam );
 394 }
 395
 396
 397 /*******************************************************************
 398  *           THUNK_EnumWindows16   (USER.54)
 399  */
 400 BOOL16 WINAPI THUNK_EnumWindows16( WNDENUMPROC16 func, LPARAM lParam )
 401 {
 402     DECL_THUNK( thunk, func, CallTo16_word_wl );
 403     return EnumWindows16( (WNDENUMPROC16)&thunk, lParam );
 404 }
 405
 406
 407 /**********************************************************************
 408  *           THUNK_EnumChildWindows16   (USER.55)
 409  */
 410 BOOL16 WINAPI THUNK_EnumChildWindows16( HWND16 parent, WNDENUMPROC16 func,
 411                                         LPARAM lParam )
 412 {
 413     DECL_THUNK( thunk, func, CallTo16_word_wl );
 414     return EnumChildWindows16( parent, (WNDENUMPROC16)&thunk, lParam );
 415 }
 416
 417
 418 /**********************************************************************
 419  *           THUNK_EnumTaskWindows16   (USER.225)
 420  */
 421 BOOL16 WINAPI THUNK_EnumTaskWindows16( HTASK16 hTask, WNDENUMPROC16 func,
 422                                        LPARAM lParam )
 423 {
 424     DECL_THUNK( thunk, func, CallTo16_word_wl );
 425     return EnumTaskWindows16( hTask, (WNDENUMPROC16)&thunk, lParam );
 426 }
 427
 428
 429 /***********************************************************************
 430  *           THUNK_EnumProps16   (USER.27)
 431  */
 432 INT16 WINAPI THUNK_EnumProps16( HWND16 hwnd, PROPENUMPROC16 func )
 433 {
 434     DECL_THUNK( thunk, func, CallTo16_word_wlw );
 435     return EnumProps16( hwnd, (PROPENUMPROC16)&thunk );
 436 }
 437
 438
 439 /***********************************************************************
 440  *           THUNK_GrayString16   (USER.185)
 441  */
 442 BOOL16 WINAPI THUNK_GrayString16( HDC16 hdc, HBRUSH16 hbr,
 443                                   GRAYSTRINGPROC16 func, LPARAM lParam,
 444                                   INT16 cch, INT16 x, INT16 y,
 445                                   INT16 cx, INT16 cy )
 446 {
 447     DECL_THUNK( thunk, func, CallTo16_word_wlw );
 448     if (!func)
 449         return GrayString16( hdc, hbr, NULL, lParam, cch, x, y, cx, cy );
 450     else
 451         return GrayString16( hdc, hbr, (GRAYSTRINGPROC16)&thunk, lParam, cch,
 452                              x, y, cx, cy );
 453 }
 454
 455
 456 /***********************************************************************
 457  *           THUNK_SetWindowsHook16   (USER.121)
 458  */
 459 FARPROC16 WINAPI THUNK_SetWindowsHook16( INT16 id, HOOKPROC16 proc )
 460 {
 461     HINSTANCE16 hInst = FarGetOwner16( HIWORD(proc) );
 462     HTASK16 hTask = (id == WH_MSGFILTER) ? GetCurrentTask() : 0;
 463     THUNK *thunk = THUNK_Alloc( (FARPROC16)proc, (RELAY)CallTo16_long_wwl );
 464     if (!thunk) return 0;
 465     return (FARPROC16)SetWindowsHookEx16( id, (HOOKPROC16)thunk, hInst, hTask);
 466 }
 467
 468
 469 /***********************************************************************
 470  *           THUNK_UnhookWindowsHook16   (USER.234)
 471  */
 472 BOOL16 WINAPI THUNK_UnhookWindowsHook16( INT16 id, HOOKPROC16 proc )
 473 {
 474     BOOL16 ret;
 475     THUNK *thunk = THUNK_Find( (FARPROC16)proc );
 476     if (!thunk) return FALSE;
 477     ret = UnhookWindowsHook16( id, (HOOKPROC16)thunk );
 478     THUNK_Free( thunk );
 479     return ret;
 480 }
 481
 482
 483 /***********************************************************************
 484  *           THUNK_SetWindowsHookEx16   (USER.291)
 485  */
 486 HHOOK WINAPI THUNK_SetWindowsHookEx16( INT16 id, HOOKPROC16 proc,
 487                                        HINSTANCE16 hInst, HTASK16 hTask )
 488 {
 489     THUNK *thunk = THUNK_Alloc( (FARPROC16)proc, (RELAY)CallTo16_long_wwl );
 490     if (!thunk) return 0;
 491     return SetWindowsHookEx16( id, (HOOKPROC16)thunk, hInst, hTask );
 492 }
 493
 494
 495 /***********************************************************************
 496  *           THUNK_UnhookWindowHookEx16   (USER.292)
 497  */
 498 BOOL16 WINAPI THUNK_UnhookWindowsHookEx16( HHOOK hhook )
 499 {
 500     THUNK *thunk = (THUNK *)HOOK_GetProc16( hhook );
 501     BOOL16 ret = UnhookWindowsHookEx16( hhook );
 502     if (thunk) THUNK_Free( thunk );
 503     return ret;
 504 }
 505
 506
 507
 508 static FARPROC16 defDCHookProc = NULL;
 509
 510 /***********************************************************************
 511  *           THUNK_SetDCHook   (GDI.190)
 512  */
 513 BOOL16 WINAPI THUNK_SetDCHook( HDC16 hdc, FARPROC16 proc, DWORD dwHookData )
 514 {
 515     THUNK *thunk, *oldThunk;
 516
 517     if (!defDCHookProc)  /* Get DCHook Win16 entry point */
 518         defDCHookProc = NE_GetEntryPoint( GetModuleHandle16("USER"), 362 );
 519
 520     if (proc != defDCHookProc)
 521     {
 522         thunk = THUNK_Alloc( proc, (RELAY)CallTo16_word_wwll );
 523         if (!thunk) return FALSE;
 524     }
 525     else thunk = (THUNK *)DCHook16;
 526
 527     /* Free the previous thunk */
 528     GetDCHook( hdc, (FARPROC16 *)&oldThunk );
 529     if (oldThunk && (oldThunk != (THUNK *)DCHook16)) THUNK_Free( oldThunk );
 530
 531     return SetDCHook( hdc, (FARPROC16)thunk, dwHookData );
 532 }
 533
 534
 535 /***********************************************************************
 536  *           THUNK_GetDCHook   (GDI.191)
 537  */
 538 DWORD WINAPI THUNK_GetDCHook( HDC16 hdc, FARPROC16 *phookProc )
 539 {
 540     THUNK *thunk = NULL;
 541     DWORD ret = GetDCHook( hdc, (FARPROC16 *)&thunk );
 542     if (thunk)
 543     {
 544         if (thunk == (THUNK *)DCHook16)
 545         {
 546             if (!defDCHookProc)  /* Get DCHook Win16 entry point */
 547                 defDCHookProc = NE_GetEntryPoint(GetModuleHandle16("USER"),362);
 548             *phookProc = defDCHookProc;
 549         }
 550         else *phookProc = thunk->proc;
 551     }
 552     return ret;
 553 }
 554
 555
 556 /***********************************************************************
 557  *           THUNK_SetTaskSignalProc (KERNEL.38)
 558  */
 559 FARPROC16 WINAPI THUNK_SetTaskSignalProc( HTASK16 hTask, FARPROC16 proc )
 560 {
 561     THUNK *thunk = THUNK_Alloc( proc, (RELAY)CallTo16_word_wwwww );
 562     if ( !thunk ) return NULL;
 563
 564     thunk = (THUNK*)SetTaskSignalProc( hTask, (FARPROC16)thunk );
 565     if ( !thunk ) return NULL;
 566
 567     proc = thunk->proc;
 568     THUNK_Free( thunk );
 569     return proc;
 570 }
 571
 572 /***********************************************************************
 573  *           THUNK_CreateThread16   (KERNEL.441)
 574  */
 575 static DWORD CALLBACK THUNK_StartThread16( LPVOID threadArgs )
 576 {
 577     FARPROC16 start = ((FARPROC16 *)threadArgs)[0];
 578     DWORD     param = ((DWORD *)threadArgs)[1];
 579     HeapFree( GetProcessHeap(), 0, threadArgs );
 580
 581     return CallTo16_long_l( start, param );
 582 }
 583 HANDLE WINAPI THUNK_CreateThread16( SECURITY_ATTRIBUTES *sa, DWORD stack,
 584                                       FARPROC16 start, SEGPTR param,
 585                                       DWORD flags, LPDWORD id )
 586 {
 587     DWORD *threadArgs = HeapAlloc( GetProcessHeap(), 0, 2*sizeof(DWORD) );
 588     if (!threadArgs) return INVALID_HANDLE_VALUE;
 589     threadArgs[0] = (DWORD)start;
 590     threadArgs[1] = (DWORD)param;
 591
 592     return CreateThread( sa, stack, THUNK_StartThread16, threadArgs, flags, id );
 593 }
 594
 595 /***********************************************************************
 596  *           THUNK_WOWCallback16Ex      (WOW32.3)(KERNEL32.55)
 597  * Generic thunking routine to call 16 bit functions from 32bit code.
 598  *
 599  * RETURNS
 600  *      TRUE if the call was done
 601  */
 602 static BOOL WINAPI THUNK_WOWCallback16Ex(
 603         FARPROC16 proc,         /* [in] 16bit function to call */
 604         DWORD dwFlags,          /* [in] flags (WCB_*) */
 605         DWORD cbArgs,           /* [in] number of arguments */
 606         LPVOID xargs,           /* [in/out] arguments */
 607         LPDWORD pdwret          /* [out] return value of the 16bit call */
 608 ) {
 609     LPDWORD     args = (LPDWORD)xargs;
 610     DWORD       ret,i;
 611
 612     TRACE(relay,"(%p,0x%08lx,%ld,%p,%p)\n",
 613         proc,dwFlags,cbArgs,xargs,pdwret
 614     );
 615     if (dwFlags == WCB16_CDECL) {
 616         /* swap the arguments */
 617         args = HeapAlloc(GetProcessHeap(),0,cbArgs*sizeof(DWORD));
 618         for (i=0;i<cbArgs;i++)
 619             args[i] = ((DWORD*)xargs)[cbArgs-i-1];
 620     }
 621     switch (cbArgs) {
 622     case 0: ret = CallTo16_long_(proc);break;
 623     case 1: ret = CallTo16_long_l(proc,args[0]);break;
 624     case 2: ret = CallTo16_long_ll(proc,args[0],args[1]);break;
 625     case 3: ret = CallTo16_long_lll(proc,args[0],args[1],args[2]);break;
 626     case 4: ret = CallTo16_long_llll(proc,args[0],args[1],args[2],args[3]);
 627             break;
 628     case 5: ret = CallTo16_long_lllll(proc,args[0],args[1],args[2],args[3],
 629                 args[4]
 630             );
 631             break;
 632     case 6: ret = CallTo16_long_llllll(proc,args[0],args[1],args[2],args[3],
 633                 args[4],args[5]
 634             );
 635             break;
 636     case 7: ret = CallTo16_long_lllllll(proc,args[0],args[1],args[2],args[3],
 637                 args[4],args[5],args[6]
 638             );
 639             break;
 640     case 8: ret = CallTo16_long_llllllll(proc,args[0],args[1],args[2],args[3],
 641                 args[4],args[5],args[6],args[7]
 642             );
 643             break;
 644     case 9: ret = CallTo16_long_lllllllll(proc,args[0],args[1],args[2],args[3],
 645                 args[4],args[5],args[6],args[7],args[8]
 646             );
 647             break;
 648     case 10:ret = CallTo16_long_llllllllll(proc,args[0],args[1],args[2],args[3],
 649                 args[4],args[5],args[6],args[7],args[8],args[9]
 650             );
 651             break;
 652     case 11:ret = CallTo16_long_lllllllllll(proc,args[0],args[1],args[2],
 653                 args[3],args[4],args[5],args[6],args[7],args[8],args[9],args[10]
 654             );
 655             break;
 656     case 12:ret = CallTo16_long_llllllllllll(proc,args[0],args[1],args[2],
 657                 args[3],args[4],args[5],args[6],args[7],args[8],args[9],
 658                 args[10],args[11]
 659             );
 660             break;
 661     case 13:ret = CallTo16_long_lllllllllllll(proc,args[0],args[1],args[2],
 662                 args[3],args[4],args[5],args[6],args[7],args[8],args[9],
 663                 args[10],args[11],args[12]
 664             );
 665             break;
 666     case 14:ret = CallTo16_long_llllllllllllll(proc,args[0],args[1],args[2],
 667                 args[3],args[4],args[5],args[6],args[7],args[8],args[9],
 668                 args[10],args[11],args[12],args[13]
 669             );
 670             break;
 671     case 15:ret = CallTo16_long_lllllllllllllll(proc,args[0],args[1],args[2],
 672                 args[3],args[4],args[5],args[6],args[7],args[8],args[9],
 673                 args[10],args[11],args[12],args[13],args[14]
 674             );
 675             break;
 676     case 16:ret = CallTo16_long_llllllllllllllll(proc,args[0],args[1],args[2],
 677                 args[3],args[4],args[5],args[6],args[7],args[8],args[9],
 678                 args[10],args[11],args[12],args[13],args[14],args[15]
 679             );
 680             break;
 681     default:
 682             ERR(thunk,"%ld arguments not supported.\n",cbArgs);
 683             if (dwFlags == WCB16_CDECL)
 684                 HeapFree(GetProcessHeap(),0,args);
 685             return FALSE;
 686     }
 687     if (dwFlags == WCB16_CDECL)
 688         HeapFree(GetProcessHeap(),0,args);
 689     if (pdwret)
 690         *pdwret = ret;
 691     return TRUE;
 692 }
 693
 694 /***********************************************************************
 695  *           THUNK_MOUSE_Enable   (MOUSE.2)
 696  */
 697 static VOID WINAPI THUNK_CallMouseEventProc( FARPROC16 proc,
 698                                              DWORD dwFlags, DWORD dx, DWORD dy,
 699                                              DWORD cButtons, DWORD dwExtraInfo )
 700 {
 701     CONTEXT context;
 702
 703     memset( &context, 0, sizeof(context) );
 704     CS_reg(&context)  = SELECTOROF( proc );
 705     EIP_reg(&context) = OFFSETOF( proc );
 706     AX_reg(&context)  = (WORD)dwFlags;
 707     BX_reg(&context)  = (WORD)dx;
 708     CX_reg(&context)  = (WORD)dy;
 709     DX_reg(&context)  = (WORD)cButtons;
 710     SI_reg(&context)  = LOWORD( dwExtraInfo );
 711     DI_reg(&context)  = HIWORD( dwExtraInfo );
 712
 713     CallTo16_sreg_( &context, 0 );
 714 }
 715 VOID WINAPI THUNK_MOUSE_Enable( FARPROC16 proc )
 716 {
 717     static THUNK *lastThunk = NULL;
 718     static FARPROC16 lastProc = NULL;
 719
 720     if ( lastProc != proc )
 721     {
 722         if ( lastThunk )
 723             THUNK_Free( lastThunk );
 724
 725         if ( !proc )
 726             lastThunk = NULL;
 727         else
 728             lastThunk = THUNK_Alloc( proc, (RELAY)THUNK_CallMouseEventProc );
 729
 730         lastProc = proc;
 731     }
 732
 733     return MOUSE_Enable( (LPMOUSE_EVENT_PROC)lastThunk );
 734 }
 735
 736 /***********************************************************************
 737  *           GetMouseEventProc   (USER.337)
 738  */
 739 FARPROC16 WINAPI GetMouseEventProc16(void)
 740 {
 741     HMODULE16 hmodule = GetModuleHandle16("USER");
 742     return NE_GetEntryPoint( hmodule, NE_GetOrdinal( hmodule, "mouse_event" ));
 743 }
 744
 745
 746 /***********************************************************************
 747  *           WIN16_mouse_event   (USER.299)
 748  */
 749 void WINAPI WIN16_mouse_event( CONTEXT *context )
 750 {
 751     mouse_event( AX_reg(context), BX_reg(context), CX_reg(context),
 752                  DX_reg(context), MAKELONG(SI_reg(context), DI_reg(context)) );
 753 }
 754
 755
 756 /***********************************************************************
 757  *           THUNK_KEYBD_Enable   (KEYBOARD.2)
 758  */
 759 static VOID WINAPI THUNK_CallKeybdEventProc( FARPROC16 proc,
 760                                              BYTE bVk, BYTE bScan,
 761                                              DWORD dwFlags, DWORD dwExtraInfo )
 762 {
 763     CONTEXT context;
 764
 765     memset( &context, 0, sizeof(context) );
 766     CS_reg(&context)  = SELECTOROF( proc );
 767     EIP_reg(&context) = OFFSETOF( proc );
 768     AH_reg(&context)  = (dwFlags & KEYEVENTF_KEYUP)? 0x80 : 0;
 769     AL_reg(&context)  = bVk;
 770     BH_reg(&context)  = (dwFlags & KEYEVENTF_EXTENDEDKEY)? 1 : 0;
 771     BL_reg(&context)  = bScan;
 772     SI_reg(&context)  = LOWORD( dwExtraInfo );
 773     DI_reg(&context)  = HIWORD( dwExtraInfo );
 774
 775     CallTo16_sreg_( &context, 0 );
 776 }
 777 VOID WINAPI THUNK_KEYBOARD_Enable( FARPROC16 proc, LPBYTE lpKeyState )
 778 {
 779     static THUNK *lastThunk = NULL;
 780     static FARPROC16 lastProc = NULL;
 781
 782     if ( lastProc != proc )
 783     {
 784         if ( lastThunk )
 785             THUNK_Free( lastThunk );
 786
 787         if ( !proc )
 788             lastThunk = NULL;
 789         else
 790             lastThunk = THUNK_Alloc( proc, (RELAY)THUNK_CallKeybdEventProc );
 791
 792         lastProc = proc;
 793     }
 794
 795     return KEYBOARD_Enable( (LPKEYBD_EVENT_PROC)lastThunk, lpKeyState );
 796 }
 797
 798 /***********************************************************************
 799  *           WIN16_keybd_event   (USER.289)
 800  */
 801 void WINAPI WIN16_keybd_event( CONTEXT *context )
 802 {
 803     DWORD dwFlags = 0;
 804
 805     if (AH_reg(context) & 0x80) dwFlags |= KEYEVENTF_KEYUP;
 806     if (BH_reg(context) & 1   ) dwFlags |= KEYEVENTF_EXTENDEDKEY;
 807
 808     keybd_event( AL_reg(context), BL_reg(context),
 809                  dwFlags, MAKELONG(SI_reg(context), DI_reg(context)) );
 810 }
 811
 812
 813 /***********************************************************************
 814  *           WIN16_CreateSystemTimer   (SYSTEM.2)
 815  */
 816 static void THUNK_CallSystemTimerProc( FARPROC16 proc, WORD timer )
 817 {
 818     CONTEXT context;
 819     memset( &context, '\0', sizeof(context) );
 820
 821     CS_reg( &context ) = SELECTOROF( proc );
 822     IP_reg( &context ) = OFFSETOF( proc );
 823     BP_reg( &context ) = OFFSETOF( THREAD_Current()->cur_stack )
 824                          + (WORD)&((STACK16FRAME*)0)->bp;
 825
 826     AX_reg( &context ) = timer;
 827
 828     if ( _ConfirmWin16Lock() )
 829     {
 830         FIXME( system, "Skipping timer %d callback because timer signal "
 831                        "arrived while we own the Win16Lock!\n", timer );
 832         return;
 833     }
 834
 835     CallTo16_sreg_( &context, 0 );
 836
 837     /* FIXME: This does not work if the signal occurs while this thread
 838               is currently in 16-bit code. With the current structure
 839               of the Wine thunking code, this seems to be hard to fix ... */
 840 }
 841 WORD WINAPI WIN16_CreateSystemTimer( WORD rate, FARPROC16 proc )
 842 {
 843     THUNK *thunk = THUNK_Alloc( proc, (RELAY)THUNK_CallSystemTimerProc );
 844     WORD timer = CreateSystemTimer( rate, (SYSTEMTIMERPROC)thunk );
 845     if (!timer) THUNK_Free( thunk );
 846     return timer;
 847 }
 848
 849 /***********************************************************************
 850  *           THUNK_InitCallout
 851  */
 852 void THUNK_InitCallout(void)
 853 {
 854     HMODULE hModule = GetModuleHandleA( "USER32" );
 855     if ( hModule )
 856     {
 857 #define GETADDR( var, name )  \
 858         *(FARPROC *)&Callout.##var = GetProcAddress( hModule, name )
 859
 860         GETADDR( PeekMessageA, "PeekMessageA" );
 861         GETADDR( PeekMessageW, "PeekMessageW" );
 862         GETADDR( GetMessageA, "GetMessageA" );
 863         GETADDR( GetMessageW, "GetMessageW" );
 864         GETADDR( SendMessageA, "SendMessageA" );
 865         GETADDR( SendMessageW, "SendMessageW" );
 866         GETADDR( PostMessageA, "PostMessageA" );
 867         GETADDR( PostMessageW, "PostMessageW" );
 868         GETADDR( PostThreadMessageA, "PostThreadMessageA" );
 869         GETADDR( PostThreadMessageW, "PostThreadMessageW" );
 870         GETADDR( TranslateMessage, "TranslateMessage" );
 871         GETADDR( DispatchMessageW, "DispatchMessageW" );
 872         GETADDR( DispatchMessageA, "DispatchMessageA" );
 873         GETADDR( RedrawWindow, "RedrawWindow" );
 874         GETADDR( UserSignalProc, "UserSignalProc" );
 875
 876 #undef GETADDR
 877     }
 878
 879     hModule = GetModuleHandle16( "USER" );
 880     if ( hModule )
 881     {
 882 #define GETADDR( var, name, thk )  \
 883         *(FARPROC *)&Callout.##var = (FARPROC) \
 884               THUNK_Alloc( WIN32_GetProcAddress16( hModule, name ), \
 885                            (RELAY)CallTo16_##thk )
 886
 887         GETADDR( PeekMessage16, "PeekMessage", word_lwwww );
 888         GETADDR( GetMessage16, "GetMessage", word_lwww );
 889         GETADDR( SendMessage16, "SendMessage", long_wwwl );
 890         GETADDR( PostMessage16, "PostMessage", word_wwwl );
 891         GETADDR( PostAppMessage16, "PostAppMessage", word_wwwl );
 892         GETADDR( TranslateMessage16, "TranslateMessage", word_l );
 893         GETADDR( DispatchMessage16, "DispatchMessage", long_l );
 894         GETADDR( RedrawWindow16, "RedrawWindow", word_wlww );
 895         GETADDR( InitApp16, "InitApp", word_w );
 896         GETADDR( InitThreadInput16, "InitThreadInput", word_ww );
 897         GETADDR( UserYield16, "UserYield", word_ );
 898         GETADDR( DestroyIcon32, "DestroyIcon32", word_ww );
 899
 900 #undef GETADDR
 901     }
 902 }
 903
 904 /***********************************************************************
 905  * 16->32 Flat Thunk routines:
 906  */
 907
 908 /***********************************************************************
 909  *              ThunkConnect16          (KERNEL.651)
 910  * Connects a 32bit and a 16bit thunkbuffer.
 911  */
 912 UINT WINAPI ThunkConnect16(
 913         LPSTR module16,              /* [in] name of win16 dll */
 914         LPSTR module32,              /* [in] name of win32 dll */
 915         HINSTANCE16 hInst16,         /* [in] hInst of win16 dll */
 916         DWORD dwReason,              /* [in] initialisation argument */
 917         struct ThunkDataCommon *TD,  /* [in/out] thunkbuffer */
 918         LPSTR thunkfun32,            /* [in] win32 thunkfunction */
 919         WORD cs                      /* [in] CS of win16 dll */
 920 ) {
 921     BOOL directionSL;
 922
 923     if (!lstrncmpA(TD->magic, "SL01", 4))
 924     {
 925         directionSL = TRUE;
 926
 927         TRACE(thunk, "SL01 thunk %s (%lx) -> %s (%s), Reason: %ld\n",
 928                      module16, (DWORD)TD, module32, thunkfun32, dwReason);
 929     }
 930     else if (!lstrncmpA(TD->magic, "LS01", 4))
 931     {
 932         directionSL = FALSE;
 933
 934         TRACE(thunk, "LS01 thunk %s (%lx) <- %s (%s), Reason: %ld\n",
 935                      module16, (DWORD)TD, module32, thunkfun32, dwReason);
 936     }
 937     else
 938     {
 939         ERR(thunk, "Invalid magic %c%c%c%c\n",
 940                    TD->magic[0], TD->magic[1], TD->magic[2], TD->magic[3]);
 941         return 0;
 942     }
 943
 944     switch (dwReason)
 945     {
 946         case DLL_PROCESS_ATTACH:
 947             if (directionSL)
 948             {
 949                 struct ThunkDataSL16 *SL16 = (struct ThunkDataSL16 *)TD;
 950                 struct ThunkDataSL   *SL   = SL16->fpData;
 951
 952                 if (SL == NULL)
 953                 {
 954                     SL = HeapAlloc(GetProcessHeap(), 0, sizeof(*SL));
 955
 956                     SL->common   = SL16->common;
 957                     SL->flags1   = SL16->flags1;
 958                     SL->flags2   = SL16->flags2;
 959
 960                     SL->apiDB    = PTR_SEG_TO_LIN(SL16->apiDatabase);
 961                     SL->targetDB = NULL;
 962
 963                     lstrcpynA(SL->pszDll16, module16, 255);
 964                     lstrcpynA(SL->pszDll32, module32, 255);
 965
 966                     /* We should create a SEGPTR to the ThunkDataSL,
 967                        but since the contents are not in the original format,
 968                        any access to this by 16-bit code would crash anyway. */
 969                     SL16->spData = 0;
 970                     SL16->fpData = SL;
 971                 }
 972
 973
 974                 if (SL->flags2 & 0x80000000)
 975                 {
 976                     TRACE(thunk, "Preloading 32-bit library\n");
 977                     LoadLibraryA(module32);
 978                 }
 979             }
 980             else
 981             {
 982                 /* nothing to do */
 983             }
 984             break;
 985
 986         case DLL_PROCESS_DETACH:
 987             /* FIXME: cleanup */
 988             break;
 989     }
 990
 991     return 1;
 992 }
 993
 994
 995 /***********************************************************************
 996  *           C16ThkSL                           (KERNEL.630)
 997  */
 998
 999 void WINAPI C16ThkSL(CONTEXT *context)
1000 {
1001     extern void CallFrom16_t_long_(void);
1002     LPBYTE stub = PTR_SEG_TO_LIN(EAX_reg(context)), x = stub;
1003     WORD cs, ds;
1004     GET_CS(cs);
1005     GET_DS(ds);
1006
1007     /* We produce the following code:
1008      *
1009      *   mov ax, __FLATDS
1010      *   mov es, ax
1011      *   movzx ecx, cx
1012      *   mov edx, es:[ecx + $EDX]
1013      *   push bp
1014      *   push edx
1015      *   call __FLATCS:CallFrom16_t_long_
1016      */
1017
1018     *x++ = 0xB8; *((WORD *)x)++ = ds;
1019     *x++ = 0x8E; *x++ = 0xC0;
1020     *x++ = 0x66; *x++ = 0x0F; *x++ = 0xB7; *x++ = 0xC9;
1021     *x++ = 0x67; *x++ = 0x66; *x++ = 0x26; *x++ = 0x8B;
1022                  *x++ = 0x91; *((DWORD *)x)++ = EDX_reg(context);
1023
1024     *x++ = 0x55;
1025     *x++ = 0x66; *x++ = 0x52;
1026     *x++ = 0x66; *x++ = 0x9A; *((DWORD *)x)++ = (DWORD)CallFrom16_t_long_;
1027                               *((WORD *)x)++ = cs;
1028
1029     /* Jump to the stub code just created */
1030     IP_reg(context) = LOWORD(EAX_reg(context));
1031     CS_reg(context) = HIWORD(EAX_reg(context));
1032
1033     /* Since C16ThkSL got called by a jmp, we need to leave the
1034        orginal return address on the stack */
1035     SP_reg(context) -= 4;
1036 }
1037
1038 /***********************************************************************
1039  *           C16ThkSL01                         (KERNEL.631)
1040  */
1041
1042 void WINAPI C16ThkSL01(CONTEXT *context)
1043 {
1044     LPBYTE stub = PTR_SEG_TO_LIN(EAX_reg(context)), x = stub;
1045
1046     if (stub)
1047     {
1048         struct ThunkDataSL16 *SL16 = PTR_SEG_TO_LIN(EDX_reg(context));
1049         struct ThunkDataSL *td = SL16->fpData;
1050
1051         extern void CallFrom16_t_long_(void);
1052         DWORD procAddress = (DWORD)GetProcAddress16(GetModuleHandle16("KERNEL"), 631);
1053         WORD cs;
1054         GET_CS(cs);
1055
1056         if (!td)
1057         {
1058             ERR(thunk, "ThunkConnect16 was not called!\n");
1059             return;
1060         }
1061
1062         TRACE(thunk, "Creating stub for ThunkDataSL %08lx\n", (DWORD)td);
1063
1064
1065         /* We produce the following code:
1066          *
1067          *   xor eax, eax
1068          *   mov edx, $td
1069          *   call C16ThkSL01
1070          *   push bp
1071          *   push edx
1072          *   call __FLATCS:CallFrom16_t_long_
1073          */
1074
1075         *x++ = 0x66; *x++ = 0x33; *x++ = 0xC0;
1076         *x++ = 0x66; *x++ = 0xBA; *((DWORD *)x)++ = (DWORD)td;
1077         *x++ = 0x9A; *((DWORD *)x)++ = procAddress;
1078
1079         *x++ = 0x55;
1080         *x++ = 0x66; *x++ = 0x52;
1081         *x++ = 0x66; *x++ = 0x9A; *((DWORD *)x)++ = (DWORD)CallFrom16_t_long_;
1082                                   *((WORD *)x)++ = cs;
1083
1084         /* Jump to the stub code just created */
1085         IP_reg(context) = LOWORD(EAX_reg(context));
1086         CS_reg(context) = HIWORD(EAX_reg(context));
1087
1088         /* Since C16ThkSL01 got called by a jmp, we need to leave the
1089            orginal return address on the stack */
1090         SP_reg(context) -= 4;
1091     }
1092     else
1093     {
1094         struct ThunkDataSL *td = (struct ThunkDataSL *)EDX_reg(context);
1095         DWORD targetNr = CX_reg(context) / 4;
1096         struct SLTargetDB *tdb;
1097
1098         TRACE(thunk, "Process %08lx calling target %ld of ThunkDataSL %08lx\n",
1099                      (DWORD)PROCESS_Current(), targetNr, (DWORD)td);
1100
1101         for (tdb = td->targetDB; tdb; tdb = tdb->next)
1102             if (tdb->process == PROCESS_Current())
1103                 break;
1104
1105         if (!tdb)
1106         {
1107             TRACE(thunk, "Loading 32-bit library %s\n", td->pszDll32);
1108             LoadLibraryA(td->pszDll32);
1109
1110             for (tdb = td->targetDB; tdb; tdb = tdb->next)
1111                 if (tdb->process == PROCESS_Current())
1112                     break;
1113         }
1114
1115         if (tdb)
1116         {
1117             EDX_reg(context) = tdb->targetTable[targetNr];
1118
1119             TRACE(thunk, "Call target is %08lx\n", EDX_reg(context));
1120         }
1121         else
1122         {
1123             WORD *stack = PTR_SEG_OFF_TO_LIN(SS_reg(context), SP_reg(context));
1124             DX_reg(context) = HIWORD(td->apiDB[targetNr].errorReturnValue);
1125             AX_reg(context) = LOWORD(td->apiDB[targetNr].errorReturnValue);
1126             IP_reg(context) = stack[2];
1127             CS_reg(context) = stack[3];
1128             SP_reg(context) += td->apiDB[targetNr].nrArgBytes + 4;
1129
1130             ERR(thunk, "Process %08lx did not ThunkConnect32 %s to %s\n",
1131                        (DWORD)PROCESS_Current(), td->pszDll32, td->pszDll16);
1132         }
1133     }
1134 }
1135
1136 DWORD WINAPI
1137 WOW16Call(WORD x,WORD y,WORD z) {
1138         int     i;
1139         DWORD   calladdr;
1140         FIXME(thunk,"(0x%04x,0x%04x,%d),calling (",x,y,z);
1141
1142         for (i=0;i<x/2;i++) {
1143                 WORD    a = STACK16_POP(THREAD_Current(),2);
1144                 DPRINTF("%04x ",a);
1145         }
1146         calladdr = STACK16_POP(THREAD_Current(),4);
1147         DPRINTF(") calling address was 0x%08lx\n",calladdr);
1148         return 0;
1149 }
1150
1151
1152 /***********************************************************************
1153  * 16<->32 Thunklet/Callback API:
1154  */
1155
1156 #pragma pack(1)
1157 typedef struct _THUNKLET
1158 {
1159     BYTE        prefix_target;
1160     BYTE        pushl_target;
1161     DWORD       target;
1162
1163     BYTE        prefix_relay;
1164     BYTE        pushl_relay;
1165     DWORD       relay;
1166
1167     BYTE        jmp_glue;
1168     DWORD       glue;
1169
1170     BYTE        type;
1171     HINSTANCE16 owner;
1172     struct _THUNKLET *next;
1173 } THUNKLET;
1174 #pragma pack(4)
1175
1176 #define THUNKLET_TYPE_LS  1
1177 #define THUNKLET_TYPE_SL  2
1178
1179 static HANDLE  ThunkletHeap = 0;
1180 static THUNKLET *ThunkletAnchor = NULL;
1181
1182 static FARPROC ThunkletSysthunkGlueLS = 0;
1183 static SEGPTR    ThunkletSysthunkGlueSL = 0;
1184
1185 static FARPROC ThunkletCallbackGlueLS = 0;
1186 static SEGPTR    ThunkletCallbackGlueSL = 0;
1187
1188 /***********************************************************************
1189  *     THUNK_ThunkletInit
1190  */
1191 static BOOL THUNK_ThunkletInit( void )
1192 {
1193     LPBYTE thunk;
1194
1195     ThunkletHeap = HeapCreate(HEAP_WINE_SEGPTR | HEAP_WINE_CODE16SEG, 0, 0);
1196     if (!ThunkletHeap) return FALSE;
1197
1198     thunk = HeapAlloc( ThunkletHeap, 0, 5 );
1199     if (!thunk) return FALSE;
1200
1201     ThunkletSysthunkGlueLS = (FARPROC)thunk;
1202     *thunk++ = 0x58;                             /* popl eax */
1203     *thunk++ = 0xC3;                             /* ret      */
1204
1205     ThunkletSysthunkGlueSL = HEAP_GetSegptr( ThunkletHeap, 0, thunk );
1206     *thunk++ = 0x66; *thunk++ = 0x58;            /* popl eax */
1207     *thunk++ = 0xCB;                             /* lret     */
1208
1209     return TRUE;
1210 }
1211
1212 /***********************************************************************
1213  *     SetThunkletCallbackGlue             (KERNEL.560)
1214  */
1215 void WINAPI SetThunkletCallbackGlue16( FARPROC glueLS, SEGPTR glueSL )
1216 {
1217     ThunkletCallbackGlueLS = glueLS;
1218     ThunkletCallbackGlueSL = glueSL;
1219 }
1220
1221
1222 /***********************************************************************
1223  *     THUNK_FindThunklet
1224  */
1225 THUNKLET *THUNK_FindThunklet( DWORD target, DWORD relay,
1226                               DWORD glue, BYTE type )
1227 {
1228     THUNKLET *thunk;
1229
1230     for (thunk = ThunkletAnchor; thunk; thunk = thunk->next)
1231         if (    thunk->type   == type
1232              && thunk->target == target
1233              && thunk->relay  == relay
1234              && thunk->glue   == glue )
1235             return thunk;
1236
1237      return NULL;
1238 }
1239
1240 /***********************************************************************
1241  *     THUNK_AllocLSThunklet
1242  */
1243 FARPROC THUNK_AllocLSThunklet( SEGPTR target, DWORD relay,
1244                                  FARPROC glue, HTASK16 owner )
1245 {
1246     THUNKLET *thunk = THUNK_FindThunklet( (DWORD)target, relay, (DWORD)glue,
1247                                           THUNKLET_TYPE_LS );
1248     if (!thunk)
1249     {
1250         TDB *pTask = (TDB*)GlobalLock16( owner );
1251
1252         if ( !(thunk = HeapAlloc( ThunkletHeap, 0, sizeof(THUNKLET) )) )
1253             return 0;
1254
1255         thunk->prefix_target = thunk->prefix_relay = 0x90;
1256         thunk->pushl_target  = thunk->pushl_relay  = 0x68;
1257         thunk->jmp_glue = 0xE9;
1258
1259         thunk->target  = (DWORD)target;
1260         thunk->relay   = (DWORD)relay;
1261         thunk->glue    = (DWORD)glue - (DWORD)&thunk->type;
1262
1263         thunk->type    = THUNKLET_TYPE_LS;
1264         thunk->owner   = pTask? pTask->hInstance : 0;
1265
1266         thunk->next    = ThunkletAnchor;
1267         ThunkletAnchor = thunk;
1268     }
1269
1270     return (FARPROC)thunk;
1271 }
1272
1273 /***********************************************************************
1274  *     THUNK_AllocSLThunklet
1275  */
1276 SEGPTR THUNK_AllocSLThunklet( FARPROC target, DWORD relay,
1277                               SEGPTR glue, HTASK16 owner )
1278 {
1279     THUNKLET *thunk = THUNK_FindThunklet( (DWORD)target, relay, (DWORD)glue,
1280                                           THUNKLET_TYPE_SL );
1281     if (!thunk)
1282     {
1283         TDB *pTask = (TDB*)GlobalLock16( owner );
1284
1285         if ( !(thunk = HeapAlloc( ThunkletHeap, 0, sizeof(THUNKLET) )) )
1286             return 0;
1287
1288         thunk->prefix_target = thunk->prefix_relay = 0x66;
1289         thunk->pushl_target  = thunk->pushl_relay  = 0x68;
1290         thunk->jmp_glue = 0xEA;
1291
1292         thunk->target  = (DWORD)target;
1293         thunk->relay   = (DWORD)relay;
1294         thunk->glue    = (DWORD)glue;
1295
1296         thunk->type    = THUNKLET_TYPE_SL;
1297         thunk->owner   = pTask? pTask->hInstance : 0;
1298
1299         thunk->next    = ThunkletAnchor;
1300         ThunkletAnchor = thunk;
1301     }
1302
1303     return HEAP_GetSegptr( ThunkletHeap, 0, thunk );
1304 }
1305
1306 /**********************************************************************
1307  *     IsLSThunklet
1308  */
1309 BOOL16 WINAPI IsLSThunklet( THUNKLET *thunk )
1310 {
1311     return    thunk->prefix_target == 0x90 && thunk->pushl_target == 0x68
1312            && thunk->prefix_relay  == 0x90 && thunk->pushl_relay  == 0x68
1313            && thunk->jmp_glue == 0xE9 && thunk->type == THUNKLET_TYPE_LS;
1314 }
1315
1316 /**********************************************************************
1317  *     IsSLThunklet                        (KERNEL.612)
1318  */
1319 BOOL16 WINAPI IsSLThunklet16( THUNKLET *thunk )
1320 {
1321     return    thunk->prefix_target == 0x66 && thunk->pushl_target == 0x68
1322            && thunk->prefix_relay  == 0x66 && thunk->pushl_relay  == 0x68
1323            && thunk->jmp_glue == 0xEA && thunk->type == THUNKLET_TYPE_SL;
1324 }
1325
1326
1327
1328 /***********************************************************************
1329  *     AllocLSThunkletSysthunk             (KERNEL.607)
1330  */
1331 FARPROC WINAPI AllocLSThunkletSysthunk16( SEGPTR target,
1332                                           FARPROC relay, DWORD dummy )
1333 {
1334     return THUNK_AllocLSThunklet( (SEGPTR)relay, (DWORD)target,
1335                                   ThunkletSysthunkGlueLS, GetCurrentTask() );
1336 }
1337
1338 /***********************************************************************
1339  *     AllocSLThunkletSysthunk             (KERNEL.608)
1340  */
1341 SEGPTR WINAPI AllocSLThunkletSysthunk16( FARPROC target,
1342                                        SEGPTR relay, DWORD dummy )
1343 {
1344     return THUNK_AllocSLThunklet( (FARPROC)relay, (DWORD)target,
1345                                   ThunkletSysthunkGlueSL, GetCurrentTask() );
1346 }
1347
1348
1349 /***********************************************************************
1350  *     AllocLSThunkletCallbackEx           (KERNEL.567)
1351  */
1352 FARPROC WINAPI AllocLSThunkletCallbackEx16( SEGPTR target,
1353                                             DWORD relay, HTASK16 task )
1354 {
1355     THUNKLET *thunk = (THUNKLET *)PTR_SEG_TO_LIN( target );
1356     if (   IsSLThunklet16( thunk ) && thunk->relay == relay
1357         && thunk->glue == (DWORD)ThunkletCallbackGlueSL )
1358         return (FARPROC)thunk->target;
1359
1360     return THUNK_AllocLSThunklet( target, relay,
1361                                   ThunkletCallbackGlueLS, task );
1362 }
1363
1364 /***********************************************************************
1365  *     AllocSLThunkletCallbackEx           (KERNEL.568)
1366  */
1367 SEGPTR WINAPI AllocSLThunkletCallbackEx16( FARPROC target,
1368                                          DWORD relay, HTASK16 task )
1369 {
1370     THUNKLET *thunk = (THUNKLET *)target;
1371     if (   IsLSThunklet( thunk ) && thunk->relay == relay
1372         && thunk->glue == (DWORD)ThunkletCallbackGlueLS )
1373         return (SEGPTR)thunk->target;
1374
1375     return THUNK_AllocSLThunklet( target, relay,
1376                                   ThunkletCallbackGlueSL, task );
1377 }
1378
1379 /***********************************************************************
1380  *     AllocLSThunkletCallback             (KERNEL.561) (KERNEL.606)
1381  */
1382 FARPROC WINAPI AllocLSThunkletCallback16( SEGPTR target, DWORD relay )
1383 {
1384     return AllocLSThunkletCallbackEx16( target, relay, GetCurrentTask() );
1385 }
1386
1387 /***********************************************************************
1388  *     AllocSLThunkletCallback             (KERNEL.562) (KERNEL.605)
1389  */
1390 SEGPTR WINAPI AllocSLThunkletCallback16( FARPROC target, DWORD relay )
1391 {
1392     return AllocSLThunkletCallbackEx16( target, relay, GetCurrentTask() );
1393 }
1394
1395 /***********************************************************************
1396  *     FindLSThunkletCallback              (KERNEL.563) (KERNEL.609)
1397  */
1398 FARPROC WINAPI FindLSThunkletCallback( SEGPTR target, DWORD relay )
1399 {
1400     THUNKLET *thunk = (THUNKLET *)PTR_SEG_TO_LIN( target );
1401     if (   thunk && IsSLThunklet16( thunk ) && thunk->relay == relay
1402         && thunk->glue == (DWORD)ThunkletCallbackGlueSL )
1403         return (FARPROC)thunk->target;
1404
1405     thunk = THUNK_FindThunklet( (DWORD)target, relay,
1406                                 (DWORD)ThunkletCallbackGlueLS,
1407                                 THUNKLET_TYPE_LS );
1408     return (FARPROC)thunk;
1409 }
1410
1411 /***********************************************************************
1412  *     FindSLThunkletCallback              (KERNEL.564) (KERNEL.610)
1413  */
1414 SEGPTR WINAPI FindSLThunkletCallback( FARPROC target, DWORD relay )
1415 {
1416     THUNKLET *thunk = (THUNKLET *)target;
1417     if (   thunk && IsLSThunklet( thunk ) && thunk->relay == relay
1418         && thunk->glue == (DWORD)ThunkletCallbackGlueLS )
1419         return (SEGPTR)thunk->target;
1420
1421     thunk = THUNK_FindThunklet( (DWORD)target, relay,
1422                                 (DWORD)ThunkletCallbackGlueSL,
1423                                 THUNKLET_TYPE_SL );
1424     return HEAP_GetSegptr( ThunkletHeap, 0, thunk );
1425 }
1426
1427
1428 /***********************************************************************
1429  * Callback Client API
1430  */
1431
1432 #define N_CBC_FIXED    20
1433 #define N_CBC_VARIABLE 10
1434 #define N_CBC_TOTAL    (N_CBC_FIXED + N_CBC_VARIABLE)
1435
1436 static SEGPTR    *CBClientRelay16[ N_CBC_TOTAL ];
1437 static FARPROC *CBClientRelay32[ N_CBC_TOTAL ];
1438
1439 /***********************************************************************
1440  *     RegisterCBClient                    (KERNEL.619)
1441  */
1442 INT16 WINAPI RegisterCBClient16( INT16 wCBCId,
1443                                SEGPTR *relay16, FARPROC *relay32 )
1444 {
1445     /* Search for free Callback ID */
1446     if ( wCBCId == -1 )
1447         for ( wCBCId = N_CBC_FIXED; wCBCId < N_CBC_TOTAL; wCBCId++ )
1448             if ( !CBClientRelay16[ wCBCId ] )
1449                 break;
1450
1451     /* Register Callback ID */
1452     if ( wCBCId > 0 && wCBCId < N_CBC_TOTAL )
1453     {
1454         CBClientRelay16[ wCBCId ] = relay16;
1455         CBClientRelay32[ wCBCId ] = relay32;
1456     }
1457     else
1458         wCBCId = 0;
1459
1460     return wCBCId;
1461 }
1462
1463 /***********************************************************************
1464  *     UnRegisterCBClient                  (KERNEL.622)
1465  */
1466 INT16 WINAPI UnRegisterCBClient16( INT16 wCBCId,
1467                                  SEGPTR *relay16, FARPROC *relay32 )
1468 {
1469     if (    wCBCId >= N_CBC_FIXED && wCBCId < N_CBC_TOTAL
1470          && CBClientRelay16[ wCBCId ] == relay16
1471          && CBClientRelay32[ wCBCId ] == relay32 )
1472     {
1473         CBClientRelay16[ wCBCId ] = 0;
1474         CBClientRelay32[ wCBCId ] = 0;
1475     }
1476     else
1477         wCBCId = 0;
1478
1479     return wCBCId;
1480 }
1481
1482
1483 /***********************************************************************
1484  *     InitCBClient                        (KERNEL.623)
1485  */
1486 void WINAPI InitCBClient16( FARPROC glueLS )
1487 {
1488     HMODULE16 kernel = GetModuleHandle16( "KERNEL" );
1489     SEGPTR glueSL = (SEGPTR)WIN32_GetProcAddress16( kernel, (LPCSTR)604 );
1490
1491     SetThunkletCallbackGlue16( glueLS, glueSL );
1492 }
1493
1494 /***********************************************************************
1495  *     CBClientGlueSL                      (KERNEL.604)
1496  */
1497 void WINAPI CBClientGlueSL( CONTEXT *context )
1498 {
1499     /* Create stack frame */
1500     SEGPTR stackSeg = STACK16_PUSH( THREAD_Current(), 12 );
1501     LPWORD stackLin = PTR_SEG_TO_LIN( stackSeg );
1502     SEGPTR glue;
1503
1504     stackLin[3] = BP_reg( context );
1505     stackLin[2] = SI_reg( context );
1506     stackLin[1] = DI_reg( context );
1507     stackLin[0] = DS_reg( context );
1508
1509     BP_reg( context ) = OFFSETOF( stackSeg ) + 6;
1510     SP_reg( context ) = OFFSETOF( stackSeg ) - 4;
1511     GS_reg( context ) = 0;
1512
1513     /* Jump to 16-bit relay code */
1514     glue = CBClientRelay16[ stackLin[5] ][ stackLin[4] ];
1515     CS_reg ( context ) = SELECTOROF( glue );
1516     EIP_reg( context ) = OFFSETOF  ( glue );
1517 }
1518
1519 /***********************************************************************
1520  *     CBClientThunkSL                      (KERNEL.620)
1521  */
1522 void WINAPI CBClientThunkSL( CONTEXT *context )
1523 {
1524     /* Call 32-bit relay code */
1525     extern DWORD WINAPI CALL32_CBClient( FARPROC proc, LPWORD args );
1526
1527     LPWORD args = PTR_SEG_OFF_TO_LIN( SS_reg( context ), BP_reg( context ) );
1528     FARPROC proc = CBClientRelay32[ args[2] ][ args[1] ];
1529
1530     EAX_reg(context) = CALL32_CBClient( proc, args );
1531 }
1532
1533 /***********************************************************************
1534  *     CBClientThunkSLEx                    (KERNEL.621)
1535  */
1536 void WINAPI CBClientThunkSLEx( CONTEXT *context )
1537 {
1538     /* Call 32-bit relay code */
1539     extern DWORD WINAPI CALL32_CBClientEx( FARPROC proc,
1540                                            LPWORD args, INT *nArgs );
1541
1542     LPWORD args = PTR_SEG_OFF_TO_LIN( SS_reg( context ), BP_reg( context ) );
1543     FARPROC proc = CBClientRelay32[ args[2] ][ args[1] ];
1544     INT nArgs;
1545     LPWORD stackLin;
1546
1547     EAX_reg(context) = CALL32_CBClientEx( proc, args, &nArgs );
1548
1549     /* Restore registers saved by CBClientGlueSL */
1550     stackLin = (LPWORD)((LPBYTE)CURRENT_STACK16 + sizeof(STACK16FRAME) - 4);
1551     BP_reg( context ) = stackLin[3];
1552     SI_reg( context ) = stackLin[2];
1553     DI_reg( context ) = stackLin[1];
1554     DS_reg( context ) = stackLin[0];
1555     SP_reg( context ) += 16+nArgs;
1556
1557     /* Return to caller of CBClient thunklet */
1558     CS_reg ( context ) = stackLin[9];
1559     EIP_reg( context ) = stackLin[8];
1560 }
1561