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