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 "task.h"
  11 #include "hook.h"
  12 #include "callback.h"
  13 #include "user.h"
  14 #include "heap.h"
  15 #include "neexe.h"
  16 #include "process.h"
  17 #include "stackframe.h"
  18 #include "win.h"
  19 #include "flatthunk.h"
  20 #include "mouse.h"
  21 #include "keyboard.h"
  22 #include "debugtools.h"
  23
  24 DECLARE_DEBUG_CHANNEL(relay)
  25 DECLARE_DEBUG_CHANNEL(system)
  26 DECLARE_DEBUG_CHANNEL(thunk)
  27
  28
  29 /* List of the 16-bit callback functions. This list is used  */
  30 /* by the build program to generate the file if1632/callto16.S */
  31
  32 /* ### start build ### */
  33 extern LONG CALLBACK CallTo16_sreg_(const CONTEXT *context, INT offset);
  34 extern LONG CALLBACK CallTo16_lreg_(const CONTEXT *context, INT offset);
  35 extern WORD CALLBACK CallTo16_word_     (FARPROC16);
  36 extern LONG CALLBACK CallTo16_long_     (FARPROC16);
  37 extern WORD CALLBACK CallTo16_word_w    (FARPROC16,WORD);
  38 extern WORD CALLBACK CallTo16_word_l    (FARPROC16,LONG);
  39 extern LONG CALLBACK CallTo16_long_l    (FARPROC16,LONG);
  40 extern WORD CALLBACK CallTo16_word_ww   (FARPROC16,WORD,WORD);
  41 extern WORD CALLBACK CallTo16_word_wl   (FARPROC16,WORD,LONG);
  42 extern WORD CALLBACK CallTo16_word_ll   (FARPROC16,LONG,LONG);
  43 extern LONG CALLBACK CallTo16_long_ll   (FARPROC16,LONG,LONG);
  44 extern WORD CALLBACK CallTo16_word_www  (FARPROC16,WORD,WORD,WORD);
  45 extern WORD CALLBACK CallTo16_word_wwl  (FARPROC16,WORD,WORD,LONG);
  46 extern WORD CALLBACK CallTo16_word_wlw  (FARPROC16,WORD,LONG,WORD);
  47 extern LONG CALLBACK CallTo16_long_wwl  (FARPROC16,WORD,WORD,LONG);
  48 extern LONG CALLBACK CallTo16_long_lll  (FARPROC16,LONG,LONG,LONG);
  49 extern WORD CALLBACK CallTo16_word_llwl (FARPROC16,LONG,LONG,WORD,LONG);
  50 extern WORD CALLBACK CallTo16_word_lwll (FARPROC16,LONG,WORD,LONG,LONG);
  51 extern WORD CALLBACK CallTo16_word_lwww (FARPROC16,LONG,WORD,WORD,WORD);
  52 extern WORD CALLBACK CallTo16_word_wlww (FARPROC16,WORD,LONG,WORD,WORD);
  53 extern WORD CALLBACK CallTo16_word_wwll (FARPROC16,WORD,WORD,LONG,LONG);
  54 extern WORD CALLBACK CallTo16_word_wwwl (FARPROC16,WORD,WORD,WORD,LONG);
  55 extern LONG CALLBACK CallTo16_long_wwwl (FARPROC16,WORD,WORD,WORD,LONG);
  56 extern WORD CALLBACK CallTo16_word_llll (FARPROC16,LONG,LONG,LONG,LONG);
  57 extern LONG CALLBACK CallTo16_long_llll (FARPROC16,LONG,LONG,LONG,LONG);
  58 extern WORD CALLBACK CallTo16_word_wllwl(FARPROC16,WORD,LONG,LONG,WORD,LONG);
  59 extern WORD CALLBACK CallTo16_word_lwwww(FARPROC16,LONG,WORD,WORD,WORD,WORD);
  60 extern LONG CALLBACK CallTo16_long_lwwll(FARPROC16,LONG,WORD,WORD,LONG,LONG);
  61 extern WORD CALLBACK CallTo16_word_wwlll(FARPROC16,WORD,WORD,LONG,LONG,LONG);
  62 extern WORD CALLBACK CallTo16_word_wwwww(FARPROC16,WORD,WORD,WORD,WORD,WORD);
  63 extern WORD CALLBACK CallTo16_word_lwlll(FARPROC16,LONG,WORD,LONG,LONG,LONG);
  64 extern LONG CALLBACK CallTo16_long_lwlll(FARPROC16,LONG,WORD,LONG,LONG,LONG);
  65 extern LONG CALLBACK CallTo16_long_lllll(FARPROC16,LONG,LONG,LONG,LONG,LONG);
  66 extern LONG CALLBACK CallTo16_long_llllll(FARPROC16,LONG,LONG,LONG,LONG,LONG,
  67                                           LONG);
  68 extern LONG CALLBACK CallTo16_long_lllllll(FARPROC16,LONG,LONG,LONG,LONG,LONG,
  69                                            LONG,LONG);
  70 extern WORD CALLBACK CallTo16_word_llwwlll(FARPROC16,LONG,LONG,WORD,WORD,LONG,
  71                                            LONG,LONG);
  72 extern LONG CALLBACK CallTo16_word_lwwlllll(FARPROC16,LONG,WORD,WORD,LONG,LONG,
  73                                             LONG,LONG,LONG);
  74 extern LONG CALLBACK CallTo16_long_llllllll(FARPROC16,LONG,LONG,LONG,LONG,LONG,
  75                                             LONG,LONG,LONG);
  76 extern LONG CALLBACK CallTo16_long_lllllllll(FARPROC16,LONG,LONG,LONG,LONG,
  77                                              LONG,LONG,LONG,LONG,LONG);
  78 extern LONG CALLBACK CallTo16_long_llllllllll(FARPROC16,LONG,LONG,LONG,LONG,
  79                                               LONG,LONG,LONG,LONG,LONG,LONG);
  80 extern LONG CALLBACK CallTo16_long_lllllllllll(FARPROC16,LONG,LONG,LONG,LONG,
  81                                                LONG,LONG,LONG,LONG,LONG,LONG,
  82                                                LONG);
  83 extern LONG CALLBACK CallTo16_long_llllllllllll(FARPROC16,LONG,LONG,LONG,LONG,
  84                                                 LONG,LONG,LONG,LONG,LONG,LONG,
  85                                                 LONG,LONG);
  86 extern LONG CALLBACK CallTo16_long_lwwllwlllllw(FARPROC16,LONG,WORD,WORD,LONG,
  87                                                 LONG,WORD,LONG,LONG,LONG,LONG,
  88                                                 LONG,WORD);
  89 extern LONG CALLBACK CallTo16_long_lllllllllllll(FARPROC16,LONG,LONG,LONG,LONG,
  90                                                  LONG,LONG,LONG,LONG,LONG,LONG,
  91                                                  LONG,LONG,LONG);
  92 extern LONG CALLBACK CallTo16_long_llllllllllllll(FARPROC16,LONG,LONG,LONG,
  93                                                   LONG,LONG,LONG,LONG,LONG,
  94                                                   LONG,LONG,LONG,LONG,LONG,
  95                                                   LONG);
  96 extern LONG CALLBACK CallTo16_word_lwwwwlwwwwllll(FARPROC16,LONG,WORD,WORD,
  97                                                   WORD,WORD,LONG,WORD,WORD,
  98                                                   WORD,WORD,LONG,LONG,LONG,
  99                                                   LONG);
 100 extern LONG CALLBACK CallTo16_long_lllllllllllllll(FARPROC16,LONG,LONG,LONG,
 101                                                    LONG,LONG,LONG,LONG,LONG,
 102                                                    LONG,LONG,LONG,LONG,LONG,
 103                                                    LONG,LONG);
 104 extern LONG CALLBACK CallTo16_long_llllllllllllllll(FARPROC16,LONG,LONG,LONG,
 105                                                     LONG,LONG,LONG,LONG,LONG,
 106                                                     LONG,LONG,LONG,LONG,LONG,
 107                                                     LONG,LONG,LONG);
 108 /* ### stop build ### */
 109
 110
 111 typedef void (*RELAY)();
 112
 113 #include "pshpack1.h"
 114
 115 typedef struct tagTHUNK
 116 {
 117     BYTE             popl_eax;           /* 0x58  popl  %eax (return address)*/
 118     BYTE             pushl_func;         /* 0x68  pushl $proc */
 119     FARPROC        proc WINE_PACKED;
 120     BYTE             pushl_eax;          /* 0x50  pushl %eax */
 121     BYTE             jmp;                /* 0xe9  jmp   relay (relative jump)*/
 122     RELAY            relay WINE_PACKED;
 123     struct tagTHUNK *next WINE_PACKED;
 124 } THUNK;
 125
 126 #include "poppack.h"
 127
 128 #define DECL_THUNK(aname,aproc,arelay) \
 129     THUNK aname; \
 130     aname.popl_eax = 0x58; \
 131     aname.pushl_func = 0x68; \
 132     aname.proc = (FARPROC) (aproc); \
 133     aname.pushl_eax = 0x50; \
 134     aname.jmp = 0xe9; \
 135     aname.relay = (RELAY)((char *)(arelay) - (char *)(&(aname).next)); \
 136     aname.next = NULL;
 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_WOWCallback16Ex( FARPROC16,DWORD,DWORD,
 144                                             LPVOID,LPDWORD );
 145 static BOOL THUNK_ThunkletInit( void );
 146
 147 extern void CallFrom16_p_long_wwwll(void);
 148
 149 /* Callbacks function table for the emulator */
 150 static const CALLBACKS_TABLE CALLBACK_EmulatorTable =
 151 {
 152     (void *)CallTo16_sreg_,                /* CallRegisterShortProc */
 153     (void *)CallTo16_lreg_,                /* CallRegisterLongProc */
 154     (void*)CallFrom16_p_long_wwwll,        /* CallFrom16WndProc */
 155     THUNK_CallWndProc16,                   /* CallWndProc */
 156     (void *)CallTo16_long_lwwll,           /* CallDriverProc */
 157     (void *)CallTo16_word_wwlll,           /* CallDriverCallback */
 158     (void *)CallTo16_word_wwlll,           /* CallTimeFuncProc */
 159     (void *)CallTo16_word_w,               /* CallWindowsExitProc */
 160     (void *)CallTo16_word_lwww,            /* CallWordBreakProc */
 161     (void *)CallTo16_word_ww,              /* CallBootAppProc */
 162     (void *)CallTo16_word_www,             /* CallLoadAppSegProc */
 163     (void *)CallTo16_word_www,             /* CallLocalNotifyFunc */
 164     (void *)CallTo16_word_www,             /* CallResourceHandlerProc */
 165     (void *)CallTo16_long_l,               /* CallWOWCallbackProc */
 166     THUNK_WOWCallback16Ex,                 /* CallWOWCallback16Ex */
 167     (void *)CallTo16_long_ll,              /* CallUTProc */
 168     (void *)CallTo16_long_l,               /* CallASPIPostProc */
 169     (void *)CallTo16_word_lwll,            /* CallDrvControlProc */
 170     (void *)CallTo16_word_lwlll,           /* CallDrvEnableProc */
 171     (void *)CallTo16_word_llll,            /* CallDrvEnumDFontsProc */
 172     (void *)CallTo16_word_lwll,            /* CallDrvEnumObjProc */
 173     (void *)CallTo16_word_lwwlllll,        /* CallDrvOutputProc */
 174     (void *)CallTo16_long_lwlll,           /* CallDrvRealizeProc */
 175     (void *)CallTo16_word_lwwwwlwwwwllll,  /* CallDrvStretchBltProc */
 176     (void *)CallTo16_long_lwwllwlllllw,    /* CallDrvExtTextOutProc */
 177     (void *)CallTo16_word_llwwlll,         /* CallDrvGetCharWidth */
 178     (void *)CallTo16_word_ww               /* CallDrvAbortProc */
 179 };
 180
 181
 182 /***********************************************************************
 183  *           THUNK_Init
 184  */
 185 BOOL THUNK_Init(void)
 186 {
 187     /* Set the window proc calling functions */
 188     Callbacks = &CALLBACK_EmulatorTable;
 189     /* Initialize Thunklets */
 190     return THUNK_ThunkletInit();
 191 }
 192
 193 /***********************************************************************
 194  *           THUNK_Alloc
 195  */
 196 static THUNK *THUNK_Alloc( FARPROC func, RELAY relay )
 197 {
 198     THUNK *thunk = HeapAlloc( GetProcessHeap(), 0, sizeof(*thunk) );
 199     if (thunk)
 200     {
 201         thunk->popl_eax   = 0x58;
 202         thunk->pushl_func = 0x68;
 203         thunk->proc       = func;
 204         thunk->pushl_eax  = 0x50;
 205         thunk->jmp        = 0xe9;
 206         thunk->relay      = (RELAY)((char *)relay - (char *)(&thunk->next));
 207         thunk->next       = firstThunk;
 208         firstThunk = thunk;
 209     }
 210     return thunk;
 211 }
 212
 213
 214 /***********************************************************************
 215  *           THUNK_Find
 216  */
 217 static THUNK *THUNK_Find( FARPROC func )
 218 {
 219     THUNK *thunk = firstThunk;
 220     while (thunk && (thunk->proc != func)) thunk = thunk->next;
 221     return thunk;
 222 }
 223
 224
 225 /***********************************************************************
 226  *           THUNK_Free
 227  */
 228 static void THUNK_Free( THUNK *thunk )
 229 {
 230     if (HEAP_IsInsideHeap( GetProcessHeap(), 0, thunk ))
 231     {
 232         THUNK **prev = &firstThunk;
 233         while (*prev && (*prev != thunk)) prev = &(*prev)->next;
 234         if (*prev)
 235         {
 236             *prev = thunk->next;
 237             HeapFree( GetProcessHeap(), 0, thunk );
 238             return;
 239         }
 240     }
 241     ERR_(thunk)("invalid thunk addr %p\n", thunk );
 242 }
 243
 244
 245 /***********************************************************************
 246  *           THUNK_CallWndProc16
 247  *
 248  * Call a 16-bit window procedure
 249  */
 250 static LRESULT WINAPI THUNK_CallWndProc16( WNDPROC16 proc, HWND16 hwnd,
 251                                            UINT16 msg, WPARAM16 wParam,
 252                                            LPARAM lParam )
 253 {
 254     CONTEXT context;
 255     LRESULT ret;
 256     WORD *args;
 257     WND *wndPtr = WIN_FindWndPtr( hwnd );
 258     DWORD offset = 0;
 259     THDB *thdb = THREAD_Current();
 260     int iWndsLocks;
 261
 262     /* Window procedures want ax = hInstance, ds = es = ss */
 263
 264     memset(&context, '\0', sizeof(context));
 265     DS_reg(&context)  = SELECTOROF(thdb->cur_stack);
 266     ES_reg(&context)  = DS_reg(&context);
 267     EAX_reg(&context) = wndPtr ? wndPtr->hInstance : DS_reg(&context);
 268     CS_reg(&context)  = SELECTOROF(proc);
 269     EIP_reg(&context) = OFFSETOF(proc);
 270     EBP_reg(&context) = OFFSETOF(thdb->cur_stack)
 271                         + (WORD)&((STACK16FRAME*)0)->bp;
 272
 273     WIN_ReleaseWndPtr(wndPtr);
 274
 275     if (lParam)
 276     {
 277         /* Some programs (eg. the "Undocumented Windows" examples, JWP) only
 278            work if structures passed in lParam are placed in the stack/data
 279            segment. Programmers easily make the mistake of converting lParam
 280            to a near rather than a far pointer, since Windows apparently
 281            allows this. We copy the structures to the 16 bit stack; this is
 282            ugly but makes these programs work. */
 283         switch (msg)
 284         {
 285           case WM_CREATE:
 286           case WM_NCCREATE:
 287             offset = sizeof(CREATESTRUCT16); break;
 288           case WM_DRAWITEM:
 289             offset = sizeof(DRAWITEMSTRUCT16); break;
 290           case WM_COMPAREITEM:
 291             offset = sizeof(COMPAREITEMSTRUCT16); break;
 292         }
 293         if (offset)
 294         {
 295             void *s = PTR_SEG_TO_LIN(lParam);
 296             lParam = STACK16_PUSH( thdb, offset );
 297             memcpy( PTR_SEG_TO_LIN(lParam), s, offset );
 298         }
 299     }
 300
 301     iWndsLocks = WIN_SuspendWndsLock();
 302
 303     args = (WORD *)THREAD_STACK16(thdb) - 5;
 304     args[0] = LOWORD(lParam);
 305     args[1] = HIWORD(lParam);
 306     args[2] = wParam;
 307     args[3] = msg;
 308     args[4] = hwnd;
 309
 310     ret = CallTo16_sreg_( &context, 5 * sizeof(WORD) );
 311     if (offset) STACK16_POP( thdb, offset );
 312
 313     WIN_RestoreWndsLock(iWndsLocks);
 314
 315     return ret;
 316 }
 317
 318
 319 /***********************************************************************
 320  *           THUNK_EnumObjects16   (GDI.71)
 321  */
 322 INT16 WINAPI THUNK_EnumObjects16( HDC16 hdc, INT16 nObjType,
 323                                   GOBJENUMPROC16 func, LPARAM lParam )
 324 {
 325     DECL_THUNK( thunk, func, CallTo16_word_ll );
 326     return EnumObjects16( hdc, nObjType, (GOBJENUMPROC16)&thunk, lParam );
 327 }
 328
 329
 330 /*************************************************************************
 331  *           THUNK_EnumFonts16   (GDI.70)
 332  */
 333 INT16 WINAPI THUNK_EnumFonts16( HDC16 hdc, LPCSTR lpFaceName,
 334                                 FONTENUMPROC16 func, LPARAM lParam )
 335 {
 336     DECL_THUNK( thunk, func, CallTo16_word_llwl );
 337     return EnumFonts16( hdc, lpFaceName, (FONTENUMPROC16)&thunk, lParam );
 338 }
 339
 340 /******************************************************************
 341  *           THUNK_EnumMetaFile16   (GDI.175)
 342  */
 343 BOOL16 WINAPI THUNK_EnumMetaFile16( HDC16 hdc, HMETAFILE16 hmf,
 344                                     MFENUMPROC16 func, LPARAM lParam )
 345 {
 346     DECL_THUNK( thunk, func, CallTo16_word_wllwl );
 347     return EnumMetaFile16( hdc, hmf, (MFENUMPROC16)&thunk, lParam );
 348 }
 349
 350
 351 /*************************************************************************
 352  *           THUNK_EnumFontFamilies16   (GDI.330)
 353  */
 354 INT16 WINAPI THUNK_EnumFontFamilies16( HDC16 hdc, LPCSTR lpszFamily,
 355                                        FONTENUMPROC16 func, LPARAM lParam )
 356 {
 357     DECL_THUNK( thunk, func, CallTo16_word_llwl );
 358     return EnumFontFamilies16(hdc, lpszFamily, (FONTENUMPROC16)&thunk, lParam);
 359 }
 360
 361
 362 /*************************************************************************
 363  *           THUNK_EnumFontFamiliesEx16   (GDI.613)
 364  */
 365 INT16 WINAPI THUNK_EnumFontFamiliesEx16( HDC16 hdc, LPLOGFONT16 lpLF,
 366                                          FONTENUMPROCEX16 func, LPARAM lParam,
 367                                          DWORD reserved )
 368 {
 369     DECL_THUNK( thunk, func, CallTo16_word_llwl );
 370     return EnumFontFamiliesEx16( hdc, lpLF, (FONTENUMPROCEX16)&thunk,
 371                                  lParam, reserved );
 372 }
 373
 374
 375 /**********************************************************************
 376  *           THUNK_LineDDA16   (GDI.100)
 377  */
 378 void WINAPI THUNK_LineDDA16( INT16 nXStart, INT16 nYStart, INT16 nXEnd,
 379                              INT16 nYEnd, LINEDDAPROC16 func, LPARAM lParam )
 380 {
 381     DECL_THUNK( thunk, func, CallTo16_word_wwl );
 382     LineDDA16( nXStart, nYStart, nXEnd, nYEnd, (LINEDDAPROC16)&thunk, lParam );
 383 }
 384
 385
 386 /*******************************************************************
 387  *           THUNK_EnumWindows16   (USER.54)
 388  */
 389 BOOL16 WINAPI THUNK_EnumWindows16( WNDENUMPROC16 func, LPARAM lParam )
 390 {
 391     DECL_THUNK( thunk, func, CallTo16_word_wl );
 392     return EnumWindows16( (WNDENUMPROC16)&thunk, lParam );
 393 }
 394
 395
 396 /**********************************************************************
 397  *           THUNK_EnumChildWindows16   (USER.55)
 398  */
 399 BOOL16 WINAPI THUNK_EnumChildWindows16( HWND16 parent, WNDENUMPROC16 func,
 400                                         LPARAM lParam )
 401 {
 402     DECL_THUNK( thunk, func, CallTo16_word_wl );
 403     return EnumChildWindows16( parent, (WNDENUMPROC16)&thunk, lParam );
 404 }
 405
 406
 407 /**********************************************************************
 408  *           THUNK_EnumTaskWindows16   (USER.225)
 409  */
 410 BOOL16 WINAPI THUNK_EnumTaskWindows16( HTASK16 hTask, WNDENUMPROC16 func,
 411                                        LPARAM lParam )
 412 {
 413     DECL_THUNK( thunk, func, CallTo16_word_wl );
 414     return EnumTaskWindows16( hTask, (WNDENUMPROC16)&thunk, lParam );
 415 }
 416
 417
 418 /***********************************************************************
 419  *           THUNK_EnumProps16   (USER.27)
 420  */
 421 INT16 WINAPI THUNK_EnumProps16( HWND16 hwnd, PROPENUMPROC16 func )
 422 {
 423     DECL_THUNK( thunk, func, CallTo16_word_wlw );
 424     return EnumProps16( hwnd, (PROPENUMPROC16)&thunk );
 425 }
 426
 427
 428 /***********************************************************************
 429  *           THUNK_GrayString16   (USER.185)
 430  */
 431 BOOL16 WINAPI THUNK_GrayString16( HDC16 hdc, HBRUSH16 hbr,
 432                                   GRAYSTRINGPROC16 func, LPARAM lParam,
 433                                   INT16 cch, INT16 x, INT16 y,
 434                                   INT16 cx, INT16 cy )
 435 {
 436     DECL_THUNK( thunk, func, CallTo16_word_wlw );
 437     if (!func)
 438         return GrayString16( hdc, hbr, NULL, lParam, cch, x, y, cx, cy );
 439     else
 440         return GrayString16( hdc, hbr, (GRAYSTRINGPROC16)&thunk, lParam, cch,
 441                              x, y, cx, cy );
 442 }
 443
 444
 445 /***********************************************************************
 446  *           THUNK_SetWindowsHook16   (USER.121)
 447  */
 448 FARPROC16 WINAPI THUNK_SetWindowsHook16( INT16 id, HOOKPROC16 proc )
 449 {
 450     HINSTANCE16 hInst = FarGetOwner16( HIWORD(proc) );
 451     HTASK16 hTask = (id == WH_MSGFILTER) ? GetCurrentTask() : 0;
 452     THUNK *thunk = THUNK_Alloc( (FARPROC16)proc, (RELAY)CallTo16_long_wwl );
 453     if (!thunk) return 0;
 454     return (FARPROC16)SetWindowsHookEx16( id, (HOOKPROC16)thunk, hInst, hTask);
 455 }
 456
 457
 458 /***********************************************************************
 459  *           THUNK_UnhookWindowsHook16   (USER.234)
 460  */
 461 BOOL16 WINAPI THUNK_UnhookWindowsHook16( INT16 id, HOOKPROC16 proc )
 462 {
 463     BOOL16 ret;
 464     THUNK *thunk = THUNK_Find( (FARPROC16)proc );
 465     if (!thunk) return FALSE;
 466     ret = UnhookWindowsHook16( id, (HOOKPROC16)thunk );
 467     THUNK_Free( thunk );
 468     return ret;
 469 }
 470
 471
 472 /***********************************************************************
 473  *           THUNK_SetWindowsHookEx16   (USER.291)
 474  */
 475 HHOOK WINAPI THUNK_SetWindowsHookEx16( INT16 id, HOOKPROC16 proc,
 476                                        HINSTANCE16 hInst, HTASK16 hTask )
 477 {
 478     THUNK *thunk = THUNK_Alloc( (FARPROC16)proc, (RELAY)CallTo16_long_wwl );
 479     if (!thunk) return 0;
 480     return SetWindowsHookEx16( id, (HOOKPROC16)thunk, hInst, hTask );
 481 }
 482
 483
 484 /***********************************************************************
 485  *           THUNK_UnhookWindowHookEx16   (USER.292)
 486  */
 487 BOOL16 WINAPI THUNK_UnhookWindowsHookEx16( HHOOK hhook )
 488 {
 489     THUNK *thunk = (THUNK *)HOOK_GetProc16( hhook );
 490     BOOL16 ret = UnhookWindowsHookEx16( hhook );
 491     if (thunk) THUNK_Free( thunk );
 492     return ret;
 493 }
 494
 495
 496
 497 static FARPROC16 defDCHookProc = NULL;
 498
 499 /***********************************************************************
 500  *           THUNK_SetDCHook   (GDI.190)
 501  */
 502 BOOL16 WINAPI THUNK_SetDCHook( HDC16 hdc, FARPROC16 proc, DWORD dwHookData )
 503 {
 504     THUNK *thunk, *oldThunk;
 505
 506     if (!defDCHookProc)  /* Get DCHook Win16 entry point */
 507     {
 508         HMODULE16 hModule = GetModuleHandle16( "USER" );
 509         NE_MODULE *pModule = NE_GetPtr( hModule );
 510
 511         if ( pModule && (pModule->flags & NE_FFLAGS_BUILTIN) )
 512             defDCHookProc = NE_GetEntryPoint( hModule, 362 );
 513         else
 514             defDCHookProc = (FARPROC16)-1;
 515     }
 516
 517     if (!proc)
 518         thunk = NULL;
 519     else if (proc != defDCHookProc)
 520     {
 521         thunk = THUNK_Alloc( proc, (RELAY)CallTo16_word_wwll );
 522         if (!thunk) return FALSE;
 523     }
 524     else thunk = (THUNK *)DCHook16;
 525
 526     /* Free the previous thunk */
 527     GetDCHook( hdc, (FARPROC16 *)&oldThunk );
 528     if (oldThunk && (oldThunk != (THUNK *)DCHook16)) THUNK_Free( oldThunk );
 529
 530     return SetDCHook( hdc, (FARPROC16)thunk, dwHookData );
 531 }
 532
 533
 534 /***********************************************************************
 535  *           THUNK_GetDCHook   (GDI.191)
 536  */
 537 DWORD WINAPI THUNK_GetDCHook( HDC16 hdc, FARPROC16 *phookProc )
 538 {
 539     THUNK *thunk = NULL;
 540     DWORD ret = GetDCHook( hdc, (FARPROC16 *)&thunk );
 541     if (thunk)
 542     {
 543         if (thunk == (THUNK *)DCHook16)
 544         {
 545             /* Note: we can only get here when running built-in USER */
 546
 547             if (!defDCHookProc)  /* Get DCHook Win16 entry point */
 548                 defDCHookProc = NE_GetEntryPoint(GetModuleHandle16("USER"),362);
 549
 550             *phookProc = defDCHookProc;
 551         }
 552         else *phookProc = thunk->proc;
 553     }
 554     return ret;
 555 }
 556
 557
 558 /***********************************************************************
 559  *           THUNK_SetTaskSignalProc (KERNEL.38)
 560  */
 561 FARPROC16 WINAPI THUNK_SetTaskSignalProc( HTASK16 hTask, FARPROC16 proc )
 562 {
 563     THUNK *thunk = THUNK_Alloc( proc, (RELAY)CallTo16_word_wwwww );
 564     if ( !thunk ) return NULL;
 565
 566     thunk = (THUNK*)SetTaskSignalProc( hTask, (FARPROC16)thunk );
 567     if ( !thunk ) return NULL;
 568
 569     proc = thunk->proc;
 570     THUNK_Free( thunk );
 571     return proc;
 572 }
 573
 574 /***********************************************************************
 575  *           THUNK_CreateThread16   (KERNEL.441)
 576  */
 577 static DWORD CALLBACK THUNK_StartThread16( LPVOID threadArgs )
 578 {
 579     FARPROC16 start = ((FARPROC16 *)threadArgs)[0];
 580     DWORD     param = ((DWORD *)threadArgs)[1];
 581     HeapFree( GetProcessHeap(), 0, threadArgs );
 582
 583     return CallTo16_long_l( start, param );
 584 }
 585 HANDLE WINAPI THUNK_CreateThread16( SECURITY_ATTRIBUTES *sa, DWORD stack,
 586                                       FARPROC16 start, SEGPTR param,
 587                                       DWORD flags, LPDWORD id )
 588 {
 589     DWORD *threadArgs = HeapAlloc( GetProcessHeap(), 0, 2*sizeof(DWORD) );
 590     if (!threadArgs) return INVALID_HANDLE_VALUE;
 591     threadArgs[0] = (DWORD)start;
 592     threadArgs[1] = (DWORD)param;
 593
 594     return CreateThread( sa, stack, THUNK_StartThread16, threadArgs, flags, id );
 595 }
 596
 597 /***********************************************************************
 598  *           THUNK_WOWCallback16Ex      (WOW32.3)(KERNEL32.55)
 599  * Generic thunking routine to call 16 bit functions from 32bit code.
 600  *
 601  * RETURNS
 602  *      TRUE if the call was done
 603  */
 604 static BOOL WINAPI THUNK_WOWCallback16Ex(
 605         FARPROC16 proc,         /* [in] 16bit function to call */
 606         DWORD dwFlags,          /* [in] flags (WCB_*) */
 607         DWORD cbArgs,           /* [in] number of arguments */
 608         LPVOID xargs,           /* [in/out] arguments */
 609         LPDWORD pdwret          /* [out] return value of the 16bit call */
 610 ) {
 611     LPDWORD     args = (LPDWORD)xargs;
 612     DWORD       ret,i;
 613
 614     TRACE_(relay)("(%p,0x%08lx,%ld,%p,%p)\n",
 615         proc,dwFlags,cbArgs,xargs,pdwret
 616     );
 617     if (dwFlags == WCB16_CDECL) {
 618         /* swap the arguments */
 619         args = HeapAlloc(GetProcessHeap(),0,cbArgs*sizeof(DWORD));
 620         for (i=0;i<cbArgs;i++)
 621             args[i] = ((DWORD*)xargs)[cbArgs-i-1];
 622     }
 623     switch (cbArgs) {
 624     case 0: ret = CallTo16_long_(proc);break;
 625     case 1: ret = CallTo16_long_l(proc,args[0]);break;
 626     case 2: ret = CallTo16_long_ll(proc,args[0],args[1]);break;
 627     case 3: ret = CallTo16_long_lll(proc,args[0],args[1],args[2]);break;
 628     case 4: ret = CallTo16_long_llll(proc,args[0],args[1],args[2],args[3]);
 629             break;
 630     case 5: ret = CallTo16_long_lllll(proc,args[0],args[1],args[2],args[3],
 631                 args[4]
 632             );
 633             break;
 634     case 6: ret = CallTo16_long_llllll(proc,args[0],args[1],args[2],args[3],
 635                 args[4],args[5]
 636             );
 637             break;
 638     case 7: ret = CallTo16_long_lllllll(proc,args[0],args[1],args[2],args[3],
 639                 args[4],args[5],args[6]
 640             );
 641             break;
 642     case 8: ret = CallTo16_long_llllllll(proc,args[0],args[1],args[2],args[3],
 643                 args[4],args[5],args[6],args[7]
 644             );
 645             break;
 646     case 9: ret = CallTo16_long_lllllllll(proc,args[0],args[1],args[2],args[3],
 647                 args[4],args[5],args[6],args[7],args[8]
 648             );
 649             break;
 650     case 10:ret = CallTo16_long_llllllllll(proc,args[0],args[1],args[2],args[3],
 651                 args[4],args[5],args[6],args[7],args[8],args[9]
 652             );
 653             break;
 654     case 11:ret = CallTo16_long_lllllllllll(proc,args[0],args[1],args[2],
 655                 args[3],args[4],args[5],args[6],args[7],args[8],args[9],args[10]
 656             );
 657             break;
 658     case 12:ret = CallTo16_long_llllllllllll(proc,args[0],args[1],args[2],
 659                 args[3],args[4],args[5],args[6],args[7],args[8],args[9],
 660                 args[10],args[11]
 661             );
 662             break;
 663     case 13:ret = CallTo16_long_lllllllllllll(proc,args[0],args[1],args[2],
 664                 args[3],args[4],args[5],args[6],args[7],args[8],args[9],
 665                 args[10],args[11],args[12]
 666             );
 667             break;
 668     case 14:ret = CallTo16_long_llllllllllllll(proc,args[0],args[1],args[2],
 669                 args[3],args[4],args[5],args[6],args[7],args[8],args[9],
 670                 args[10],args[11],args[12],args[13]
 671             );
 672             break;
 673     case 15:ret = CallTo16_long_lllllllllllllll(proc,args[0],args[1],args[2],
 674                 args[3],args[4],args[5],args[6],args[7],args[8],args[9],
 675                 args[10],args[11],args[12],args[13],args[14]
 676             );
 677             break;
 678     case 16:ret = CallTo16_long_llllllllllllllll(proc,args[0],args[1],args[2],
 679                 args[3],args[4],args[5],args[6],args[7],args[8],args[9],
 680                 args[10],args[11],args[12],args[13],args[14],args[15]
 681             );
 682             break;
 683     default:
 684             ERR_(thunk)("%ld arguments not supported.\n",cbArgs);
 685             if (dwFlags == WCB16_CDECL)
 686                 HeapFree(GetProcessHeap(),0,args);
 687             return FALSE;
 688     }
 689     if (dwFlags == WCB16_CDECL)
 690         HeapFree(GetProcessHeap(),0,args);
 691     if (pdwret)
 692         *pdwret = ret;
 693     return TRUE;
 694 }
 695
 696 /***********************************************************************
 697  *           THUNK_MOUSE_Enable   (MOUSE.2)
 698  */
 699 static VOID WINAPI THUNK_CallMouseEventProc( FARPROC16 proc,
 700                                              DWORD dwFlags, DWORD dx, DWORD dy,
 701                                              DWORD cButtons, DWORD dwExtraInfo )
 702 {
 703     CONTEXT context;
 704
 705     memset( &context, 0, sizeof(context) );
 706     CS_reg(&context)  = SELECTOROF( proc );
 707     EIP_reg(&context) = OFFSETOF( proc );
 708     AX_reg(&context)  = (WORD)dwFlags;
 709     BX_reg(&context)  = (WORD)dx;
 710     CX_reg(&context)  = (WORD)dy;
 711     DX_reg(&context)  = (WORD)cButtons;
 712     SI_reg(&context)  = LOWORD( dwExtraInfo );
 713     DI_reg(&context)  = HIWORD( dwExtraInfo );
 714
 715     CallTo16_sreg_( &context, 0 );
 716 }
 717 VOID WINAPI THUNK_MOUSE_Enable( FARPROC16 proc )
 718 {
 719     static THUNK *lastThunk = NULL;
 720     static FARPROC16 lastProc = NULL;
 721
 722     if ( lastProc != proc )
 723     {
 724         if ( lastThunk )
 725             THUNK_Free( lastThunk );
 726
 727         if ( !proc )
 728             lastThunk = NULL;
 729         else
 730             lastThunk = THUNK_Alloc( proc, (RELAY)THUNK_CallMouseEventProc );
 731
 732         lastProc = proc;
 733     }
 734
 735     MOUSE_Enable( (LPMOUSE_EVENT_PROC)lastThunk );
 736 }
 737
 738 /***********************************************************************
 739  *           GetMouseEventProc   (USER.337)
 740  */
 741 FARPROC16 WINAPI GetMouseEventProc16(void)
 742 {
 743     HMODULE16 hmodule = GetModuleHandle16("USER");
 744     return NE_GetEntryPoint( hmodule, NE_GetOrdinal( hmodule, "mouse_event" ));
 745 }
 746
 747
 748 /***********************************************************************
 749  *           WIN16_mouse_event   (USER.299)
 750  */
 751 void WINAPI WIN16_mouse_event( CONTEXT *context )
 752 {
 753     mouse_event( AX_reg(context), BX_reg(context), CX_reg(context),
 754                  DX_reg(context), MAKELONG(SI_reg(context), DI_reg(context)) );
 755 }
 756
 757
 758 /***********************************************************************
 759  *           THUNK_KEYBD_Enable   (KEYBOARD.2)
 760  */
 761 static VOID WINAPI THUNK_CallKeybdEventProc( FARPROC16 proc,
 762                                              BYTE bVk, BYTE bScan,
 763                                              DWORD dwFlags, DWORD dwExtraInfo )
 764 {
 765     CONTEXT context;
 766
 767     memset( &context, 0, sizeof(context) );
 768     CS_reg(&context)  = SELECTOROF( proc );
 769     EIP_reg(&context) = OFFSETOF( proc );
 770     AH_reg(&context)  = (dwFlags & KEYEVENTF_KEYUP)? 0x80 : 0;
 771     AL_reg(&context)  = bVk;
 772     BH_reg(&context)  = (dwFlags & KEYEVENTF_EXTENDEDKEY)? 1 : 0;
 773     BL_reg(&context)  = bScan;
 774     SI_reg(&context)  = LOWORD( dwExtraInfo );
 775     DI_reg(&context)  = HIWORD( dwExtraInfo );
 776
 777     CallTo16_sreg_( &context, 0 );
 778 }
 779 VOID WINAPI THUNK_KEYBOARD_Enable( FARPROC16 proc, LPBYTE lpKeyState )
 780 {
 781     static THUNK *lastThunk = NULL;
 782     static FARPROC16 lastProc = NULL;
 783
 784     if ( lastProc != proc )
 785     {
 786         if ( lastThunk )
 787             THUNK_Free( lastThunk );
 788
 789         if ( !proc )
 790             lastThunk = NULL;
 791         else
 792             lastThunk = THUNK_Alloc( proc, (RELAY)THUNK_CallKeybdEventProc );
 793
 794         lastProc = proc;
 795     }
 796
 797     KEYBOARD_Enable( (LPKEYBD_EVENT_PROC)lastThunk, lpKeyState );
 798 }
 799
 800 /***********************************************************************
 801  *           WIN16_keybd_event   (USER.289)
 802  */
 803 void WINAPI WIN16_keybd_event( CONTEXT *context )
 804 {
 805     DWORD dwFlags = 0;
 806
 807     if (AH_reg(context) & 0x80) dwFlags |= KEYEVENTF_KEYUP;
 808     if (BH_reg(context) & 1   ) dwFlags |= KEYEVENTF_EXTENDEDKEY;
 809
 810     keybd_event( AL_reg(context), BL_reg(context),
 811                  dwFlags, MAKELONG(SI_reg(context), DI_reg(context)) );
 812 }
 813
 814
 815 /***********************************************************************
 816  *           WIN16_CreateSystemTimer   (SYSTEM.2)
 817  */
 818 static void THUNK_CallSystemTimerProc( FARPROC16 proc, WORD timer )
 819 {
 820     CONTEXT context;
 821     memset( &context, '\0', sizeof(context) );
 822
 823     CS_reg( &context ) = SELECTOROF( proc );
 824     IP_reg( &context ) = OFFSETOF( proc );
 825     BP_reg( &context ) = OFFSETOF( THREAD_Current()->cur_stack )
 826                          + (WORD)&((STACK16FRAME*)0)->bp;
 827
 828     AX_reg( &context ) = timer;
 829
 830     if ( _ConfirmWin16Lock() )
 831     {
 832         FIXME_(system)("Skipping timer %d callback because timer signal "
 833                        "arrived while we own the Win16Lock!\n", timer );
 834         return;
 835     }
 836
 837     CallTo16_sreg_( &context, 0 );
 838
 839     /* FIXME: This does not work if the signal occurs while this thread
 840               is currently in 16-bit code. With the current structure
 841               of the Wine thunking code, this seems to be hard to fix ... */
 842 }
 843 WORD WINAPI WIN16_CreateSystemTimer( WORD rate, FARPROC16 proc )
 844 {
 845     THUNK *thunk = THUNK_Alloc( proc, (RELAY)THUNK_CallSystemTimerProc );
 846     WORD timer = CreateSystemTimer( rate, (SYSTEMTIMERPROC)thunk );
 847     if (!timer) THUNK_Free( thunk );
 848     return timer;
 849 }
 850
 851 /***********************************************************************
 852  *           THUNK_InitCallout
 853  */
 854 void THUNK_InitCallout(void)
 855 {
 856     HMODULE hModule;
 857     WINE_MODREF *wm;
 858     NE_MODULE *pModule;
 859
 860     hModule = GetModuleHandleA( "USER32" );
 861     wm = MODULE32_LookupHMODULE( hModule );
 862     if ( wm && !(wm->flags & WINE_MODREF_INTERNAL) )
 863     {
 864 #define GETADDR( var, name )  \
 865         *(FARPROC *)&Callout.##var = GetProcAddress( hModule, name )
 866
 867         GETADDR( PeekMessageA, "PeekMessageA" );
 868         GETADDR( PeekMessageW, "PeekMessageW" );
 869         GETADDR( GetMessageA, "GetMessageA" );
 870         GETADDR( GetMessageW, "GetMessageW" );
 871         GETADDR( SendMessageA, "SendMessageA" );
 872         GETADDR( SendMessageW, "SendMessageW" );
 873         GETADDR( PostMessageA, "PostMessageA" );
 874         GETADDR( PostMessageW, "PostMessageW" );
 875         GETADDR( PostThreadMessageA, "PostThreadMessageA" );
 876         GETADDR( PostThreadMessageW, "PostThreadMessageW" );
 877         GETADDR( TranslateMessage, "TranslateMessage" );
 878         GETADDR( DispatchMessageW, "DispatchMessageW" );
 879         GETADDR( DispatchMessageA, "DispatchMessageA" );
 880         GETADDR( RedrawWindow, "RedrawWindow" );
 881         GETADDR( UserSignalProc, "UserSignalProc" );
 882
 883 #undef GETADDR
 884     }
 885
 886     hModule = GetModuleHandle16( "USER" );
 887     pModule = NE_GetPtr( hModule );
 888     if ( pModule && !(pModule->flags & NE_FFLAGS_BUILTIN) )
 889     {
 890 #define GETADDR( var, name, thk )  \
 891         *(FARPROC *)&Callout.##var = (FARPROC) \
 892               THUNK_Alloc( WIN32_GetProcAddress16( hModule, name ), \
 893                            (RELAY)CallTo16_##thk )
 894
 895         GETADDR( PeekMessage16, "PeekMessage", word_lwwww );
 896         GETADDR( GetMessage16, "GetMessage", word_lwww );
 897         GETADDR( SendMessage16, "SendMessage", long_wwwl );
 898         GETADDR( PostMessage16, "PostMessage", word_wwwl );
 899         GETADDR( PostAppMessage16, "PostAppMessage", word_wwwl );
 900         GETADDR( TranslateMessage16, "TranslateMessage", word_l );
 901         GETADDR( DispatchMessage16, "DispatchMessage", long_l );
 902         GETADDR( RedrawWindow16, "RedrawWindow", word_wlww );
 903         GETADDR( InitApp16, "InitApp", word_w );
 904         GETADDR( InitThreadInput16, "InitThreadInput", word_ww );
 905         GETADDR( UserYield16, "UserYield", word_ );
 906         GETADDR( DestroyIcon32, "DestroyIcon32", word_ww );
 907
 908 #undef GETADDR
 909     }
 910 }
 911
 912 /***********************************************************************
 913  * 16->32 Flat Thunk routines:
 914  */
 915
 916 /***********************************************************************
 917  *              ThunkConnect16          (KERNEL.651)
 918  * Connects a 32bit and a 16bit thunkbuffer.
 919  */
 920 UINT WINAPI ThunkConnect16(
 921         LPSTR module16,              /* [in] name of win16 dll */
 922         LPSTR module32,              /* [in] name of win32 dll */
 923         HINSTANCE16 hInst16,         /* [in] hInst of win16 dll */
 924         DWORD dwReason,              /* [in] initialisation argument */
 925         struct ThunkDataCommon *TD,  /* [in/out] thunkbuffer */
 926         LPSTR thunkfun32,            /* [in] win32 thunkfunction */
 927         WORD cs                      /* [in] CS of win16 dll */
 928 ) {
 929     BOOL directionSL;
 930
 931     if (!lstrncmpA(TD->magic, "SL01", 4))
 932     {
 933         directionSL = TRUE;
 934
 935         TRACE_(thunk)("SL01 thunk %s (%lx) -> %s (%s), Reason: %ld\n",
 936                      module16, (DWORD)TD, module32, thunkfun32, dwReason);
 937     }
 938     else if (!lstrncmpA(TD->magic, "LS01", 4))
 939     {
 940         directionSL = FALSE;
 941
 942         TRACE_(thunk)("LS01 thunk %s (%lx) <- %s (%s), Reason: %ld\n",
 943                      module16, (DWORD)TD, module32, thunkfun32, dwReason);
 944     }
 945     else
 946     {
 947         ERR_(thunk)("Invalid magic %c%c%c%c\n",
 948                    TD->magic[0], TD->magic[1], TD->magic[2], TD->magic[3]);
 949         return 0;
 950     }
 951
 952     switch (dwReason)
 953     {
 954         case DLL_PROCESS_ATTACH:
 955             if (directionSL)
 956             {
 957                 struct ThunkDataSL16 *SL16 = (struct ThunkDataSL16 *)TD;
 958                 struct ThunkDataSL   *SL   = SL16->fpData;
 959
 960                 if (SL == NULL)
 961                 {
 962                     SL = HeapAlloc(GetProcessHeap(), 0, sizeof(*SL));
 963
 964                     SL->common   = SL16->common;
 965                     SL->flags1   = SL16->flags1;
 966                     SL->flags2   = SL16->flags2;
 967
 968                     SL->apiDB    = PTR_SEG_TO_LIN(SL16->apiDatabase);
 969                     SL->targetDB = NULL;
 970
 971                     lstrcpynA(SL->pszDll16, module16, 255);
 972                     lstrcpynA(SL->pszDll32, module32, 255);
 973
 974                     /* We should create a SEGPTR to the ThunkDataSL,
 975                        but since the contents are not in the original format,
 976                        any access to this by 16-bit code would crash anyway. */
 977                     SL16->spData = 0;
 978                     SL16->fpData = SL;
 979                 }
 980
 981
 982                 if (SL->flags2 & 0x80000000)
 983                 {
 984                     TRACE_(thunk)("Preloading 32-bit library\n");
 985                     LoadLibraryA(module32);
 986                 }
 987             }
 988             else
 989             {
 990                 /* nothing to do */
 991             }
 992             break;
 993
 994         case DLL_PROCESS_DETACH:
 995             /* FIXME: cleanup */
 996             break;
 997     }
 998
 999     return 1;
1000 }
1001
1002
1003 /***********************************************************************
1004  *           C16ThkSL                           (KERNEL.630)
1005  */
1006
1007 void WINAPI C16ThkSL(CONTEXT *context)
1008 {
1009     extern void CallFrom16_t_long_(void);
1010     LPBYTE stub = PTR_SEG_TO_LIN(EAX_reg(context)), x = stub;
1011     WORD cs, ds;
1012     GET_CS(cs);
1013     GET_DS(ds);
1014
1015     /* We produce the following code:
1016      *
1017      *   mov ax, __FLATDS
1018      *   mov es, ax
1019      *   movzx ecx, cx
1020      *   mov edx, es:[ecx + $EDX]
1021      *   push bp
1022      *   push edx
1023      *   call __FLATCS:CallFrom16_t_long_
1024      */
1025
1026     *x++ = 0xB8; *((WORD *)x)++ = ds;
1027     *x++ = 0x8E; *x++ = 0xC0;
1028     *x++ = 0x66; *x++ = 0x0F; *x++ = 0xB7; *x++ = 0xC9;
1029     *x++ = 0x67; *x++ = 0x66; *x++ = 0x26; *x++ = 0x8B;
1030                  *x++ = 0x91; *((DWORD *)x)++ = EDX_reg(context);
1031
1032     *x++ = 0x55;
1033     *x++ = 0x66; *x++ = 0x52;
1034     *x++ = 0x66; *x++ = 0x9A; *((DWORD *)x)++ = (DWORD)CallFrom16_t_long_;
1035                               *((WORD *)x)++ = cs;
1036
1037     /* Jump to the stub code just created */
1038     IP_reg(context) = LOWORD(EAX_reg(context));
1039     CS_reg(context) = HIWORD(EAX_reg(context));
1040
1041     /* Since C16ThkSL got called by a jmp, we need to leave the
1042        orginal return address on the stack */
1043     SP_reg(context) -= 4;
1044 }
1045
1046 /***********************************************************************
1047  *           C16ThkSL01                         (KERNEL.631)
1048  */
1049
1050 void WINAPI C16ThkSL01(CONTEXT *context)
1051 {
1052     LPBYTE stub = PTR_SEG_TO_LIN(EAX_reg(context)), x = stub;
1053
1054     if (stub)
1055     {
1056         struct ThunkDataSL16 *SL16 = PTR_SEG_TO_LIN(EDX_reg(context));
1057         struct ThunkDataSL *td = SL16->fpData;
1058
1059         extern void CallFrom16_t_long_(void);
1060         DWORD procAddress = (DWORD)GetProcAddress16(GetModuleHandle16("KERNEL"), 631);
1061         WORD cs;
1062         GET_CS(cs);
1063
1064         if (!td)
1065         {
1066             ERR_(thunk)("ThunkConnect16 was not called!\n");
1067             return;
1068         }
1069
1070         TRACE_(thunk)("Creating stub for ThunkDataSL %08lx\n", (DWORD)td);
1071
1072
1073         /* We produce the following code:
1074          *
1075          *   xor eax, eax
1076          *   mov edx, $td
1077          *   call C16ThkSL01
1078          *   push bp
1079          *   push edx
1080          *   call __FLATCS:CallFrom16_t_long_
1081          */
1082
1083         *x++ = 0x66; *x++ = 0x33; *x++ = 0xC0;
1084         *x++ = 0x66; *x++ = 0xBA; *((DWORD *)x)++ = (DWORD)td;
1085         *x++ = 0x9A; *((DWORD *)x)++ = procAddress;
1086
1087         *x++ = 0x55;
1088         *x++ = 0x66; *x++ = 0x52;
1089         *x++ = 0x66; *x++ = 0x9A; *((DWORD *)x)++ = (DWORD)CallFrom16_t_long_;
1090                                   *((WORD *)x)++ = cs;
1091
1092         /* Jump to the stub code just created */
1093         IP_reg(context) = LOWORD(EAX_reg(context));
1094         CS_reg(context) = HIWORD(EAX_reg(context));
1095
1096         /* Since C16ThkSL01 got called by a jmp, we need to leave the
1097            orginal return address on the stack */
1098         SP_reg(context) -= 4;
1099     }
1100     else
1101     {
1102         struct ThunkDataSL *td = (struct ThunkDataSL *)EDX_reg(context);
1103         DWORD targetNr = CX_reg(context) / 4;
1104         struct SLTargetDB *tdb;
1105
1106         TRACE_(thunk)("Process %08lx calling target %ld of ThunkDataSL %08lx\n",
1107                      (DWORD)PROCESS_Current(), targetNr, (DWORD)td);
1108
1109         for (tdb = td->targetDB; tdb; tdb = tdb->next)
1110             if (tdb->process == PROCESS_Current())
1111                 break;
1112
1113         if (!tdb)
1114         {
1115             TRACE_(thunk)("Loading 32-bit library %s\n", td->pszDll32);
1116             LoadLibraryA(td->pszDll32);
1117
1118             for (tdb = td->targetDB; tdb; tdb = tdb->next)
1119                 if (tdb->process == PROCESS_Current())
1120                     break;
1121         }
1122
1123         if (tdb)
1124         {
1125             EDX_reg(context) = tdb->targetTable[targetNr];
1126
1127             TRACE_(thunk)("Call target is %08lx\n", EDX_reg(context));
1128         }
1129         else
1130         {
1131             WORD *stack = PTR_SEG_OFF_TO_LIN(SS_reg(context), SP_reg(context));
1132             DX_reg(context) = HIWORD(td->apiDB[targetNr].errorReturnValue);
1133             AX_reg(context) = LOWORD(td->apiDB[targetNr].errorReturnValue);
1134             IP_reg(context) = stack[2];
1135             CS_reg(context) = stack[3];
1136             SP_reg(context) += td->apiDB[targetNr].nrArgBytes + 4;
1137
1138             ERR_(thunk)("Process %08lx did not ThunkConnect32 %s to %s\n",
1139                        (DWORD)PROCESS_Current(), td->pszDll32, td->pszDll16);
1140         }
1141     }
1142 }
1143
1144 DWORD WINAPI
1145 WOW16Call(WORD x,WORD y,WORD z) {
1146         int     i;
1147         DWORD   calladdr;
1148         FIXME_(thunk)("(0x%04x,0x%04x,%d),calling (",x,y,z);
1149
1150         for (i=0;i<x/2;i++) {
1151                 WORD    a = STACK16_POP(THREAD_Current(),2);
1152                 DPRINTF("%04x ",a);
1153         }
1154         calladdr = STACK16_POP(THREAD_Current(),4);
1155         DPRINTF(") calling address was 0x%08lx\n",calladdr);
1156         return 0;
1157 }
1158
1159
1160 /***********************************************************************
1161  * 16<->32 Thunklet/Callback API:
1162  */
1163
1164 #include "pshpack1.h"
1165 typedef struct _THUNKLET
1166 {
1167     BYTE        prefix_target;
1168     BYTE        pushl_target;
1169     DWORD       target;
1170
1171     BYTE        prefix_relay;
1172     BYTE        pushl_relay;
1173     DWORD       relay;
1174
1175     BYTE        jmp_glue;
1176     DWORD       glue;
1177
1178     BYTE        type;
1179     HINSTANCE16 owner;
1180     struct _THUNKLET *next;
1181 } THUNKLET;
1182 #include "poppack.h"
1183
1184 #define THUNKLET_TYPE_LS  1
1185 #define THUNKLET_TYPE_SL  2
1186
1187 static HANDLE  ThunkletHeap = 0;
1188 static THUNKLET *ThunkletAnchor = NULL;
1189
1190 static FARPROC ThunkletSysthunkGlueLS = 0;
1191 static SEGPTR    ThunkletSysthunkGlueSL = 0;
1192
1193 static FARPROC ThunkletCallbackGlueLS = 0;
1194 static SEGPTR    ThunkletCallbackGlueSL = 0;
1195
1196 /***********************************************************************
1197  *     THUNK_ThunkletInit
1198  */
1199 static BOOL THUNK_ThunkletInit( void )
1200 {
1201     LPBYTE thunk;
1202
1203     ThunkletHeap = HeapCreate(HEAP_WINE_SEGPTR | HEAP_WINE_CODE16SEG, 0, 0);
1204     if (!ThunkletHeap) return FALSE;
1205
1206     thunk = HeapAlloc( ThunkletHeap, 0, 5 );
1207     if (!thunk) return FALSE;
1208
1209     ThunkletSysthunkGlueLS = (FARPROC)thunk;
1210     *thunk++ = 0x58;                             /* popl eax */
1211     *thunk++ = 0xC3;                             /* ret      */
1212
1213     ThunkletSysthunkGlueSL = HEAP_GetSegptr( ThunkletHeap, 0, thunk );
1214     *thunk++ = 0x66; *thunk++ = 0x58;            /* popl eax */
1215     *thunk++ = 0xCB;                             /* lret     */
1216
1217     return TRUE;
1218 }
1219
1220 /***********************************************************************
1221  *     SetThunkletCallbackGlue             (KERNEL.560)
1222  */
1223 void WINAPI SetThunkletCallbackGlue16( FARPROC glueLS, SEGPTR glueSL )
1224 {
1225     ThunkletCallbackGlueLS = glueLS;
1226     ThunkletCallbackGlueSL = glueSL;
1227 }
1228
1229
1230 /***********************************************************************
1231  *     THUNK_FindThunklet
1232  */
1233 THUNKLET *THUNK_FindThunklet( DWORD target, DWORD relay,
1234                               DWORD glue, BYTE type )
1235 {
1236     THUNKLET *thunk;
1237
1238     for (thunk = ThunkletAnchor; thunk; thunk = thunk->next)
1239         if (    thunk->type   == type
1240              && thunk->target == target
1241              && thunk->relay  == relay
1242              && ( type == THUNKLET_TYPE_LS ?
1243                     ( thunk->glue == glue - (DWORD)&thunk->type )
1244                   : ( thunk->glue == glue ) ) )
1245             return thunk;
1246
1247      return NULL;
1248 }
1249
1250 /***********************************************************************
1251  *     THUNK_AllocLSThunklet
1252  */
1253 FARPROC THUNK_AllocLSThunklet( SEGPTR target, DWORD relay,
1254                                  FARPROC glue, HTASK16 owner )
1255 {
1256     THUNKLET *thunk = THUNK_FindThunklet( (DWORD)target, relay, (DWORD)glue,
1257                                           THUNKLET_TYPE_LS );
1258     if (!thunk)
1259     {
1260         TDB *pTask = (TDB*)GlobalLock16( owner );
1261
1262         if ( !(thunk = HeapAlloc( ThunkletHeap, 0, sizeof(THUNKLET) )) )
1263             return 0;
1264
1265         thunk->prefix_target = thunk->prefix_relay = 0x90;
1266         thunk->pushl_target  = thunk->pushl_relay  = 0x68;
1267         thunk->jmp_glue = 0xE9;
1268
1269         thunk->target  = (DWORD)target;
1270         thunk->relay   = (DWORD)relay;
1271         thunk->glue    = (DWORD)glue - (DWORD)&thunk->type;
1272
1273         thunk->type    = THUNKLET_TYPE_LS;
1274         thunk->owner   = pTask? pTask->hInstance : 0;
1275
1276         thunk->next    = ThunkletAnchor;
1277         ThunkletAnchor = thunk;
1278     }
1279
1280     return (FARPROC)thunk;
1281 }
1282
1283 /***********************************************************************
1284  *     THUNK_AllocSLThunklet
1285  */
1286 SEGPTR THUNK_AllocSLThunklet( FARPROC target, DWORD relay,
1287                               SEGPTR glue, HTASK16 owner )
1288 {
1289     THUNKLET *thunk = THUNK_FindThunklet( (DWORD)target, relay, (DWORD)glue,
1290                                           THUNKLET_TYPE_SL );
1291     if (!thunk)
1292     {
1293         TDB *pTask = (TDB*)GlobalLock16( owner );
1294
1295         if ( !(thunk = HeapAlloc( ThunkletHeap, 0, sizeof(THUNKLET) )) )
1296             return 0;
1297
1298         thunk->prefix_target = thunk->prefix_relay = 0x66;
1299         thunk->pushl_target  = thunk->pushl_relay  = 0x68;
1300         thunk->jmp_glue = 0xEA;
1301
1302         thunk->target  = (DWORD)target;
1303         thunk->relay   = (DWORD)relay;
1304         thunk->glue    = (DWORD)glue;
1305
1306         thunk->type    = THUNKLET_TYPE_SL;
1307         thunk->owner   = pTask? pTask->hInstance : 0;
1308
1309         thunk->next    = ThunkletAnchor;
1310         ThunkletAnchor = thunk;
1311     }
1312
1313     return HEAP_GetSegptr( ThunkletHeap, 0, thunk );
1314 }
1315
1316 /**********************************************************************
1317  *     IsLSThunklet
1318  */
1319 BOOL16 WINAPI IsLSThunklet( THUNKLET *thunk )
1320 {
1321     return    thunk->prefix_target == 0x90 && thunk->pushl_target == 0x68
1322            && thunk->prefix_relay  == 0x90 && thunk->pushl_relay  == 0x68
1323            && thunk->jmp_glue == 0xE9 && thunk->type == THUNKLET_TYPE_LS;
1324 }
1325
1326 /**********************************************************************
1327  *     IsSLThunklet                        (KERNEL.612)
1328  */
1329 BOOL16 WINAPI IsSLThunklet16( THUNKLET *thunk )
1330 {
1331     return    thunk->prefix_target == 0x66 && thunk->pushl_target == 0x68
1332            && thunk->prefix_relay  == 0x66 && thunk->pushl_relay  == 0x68
1333            && thunk->jmp_glue == 0xEA && thunk->type == THUNKLET_TYPE_SL;
1334 }
1335
1336
1337
1338 /***********************************************************************
1339  *     AllocLSThunkletSysthunk             (KERNEL.607)
1340  */
1341 FARPROC WINAPI AllocLSThunkletSysthunk16( SEGPTR target,
1342                                           FARPROC relay, DWORD dummy )
1343 {
1344     return THUNK_AllocLSThunklet( (SEGPTR)relay, (DWORD)target,
1345                                   ThunkletSysthunkGlueLS, GetCurrentTask() );
1346 }
1347
1348 /***********************************************************************
1349  *     AllocSLThunkletSysthunk             (KERNEL.608)
1350  */
1351 SEGPTR WINAPI AllocSLThunkletSysthunk16( FARPROC target,
1352                                        SEGPTR relay, DWORD dummy )
1353 {
1354     return THUNK_AllocSLThunklet( (FARPROC)relay, (DWORD)target,
1355                                   ThunkletSysthunkGlueSL, GetCurrentTask() );
1356 }
1357
1358
1359 /***********************************************************************
1360  *     AllocLSThunkletCallbackEx           (KERNEL.567)
1361  */
1362 FARPROC WINAPI AllocLSThunkletCallbackEx16( SEGPTR target,
1363                                             DWORD relay, HTASK16 task )
1364 {
1365     THUNKLET *thunk = (THUNKLET *)PTR_SEG_TO_LIN( target );
1366     if ( !thunk ) return NULL;
1367
1368     if (   IsSLThunklet16( thunk ) && thunk->relay == relay
1369         && thunk->glue == (DWORD)ThunkletCallbackGlueSL )
1370         return (FARPROC)thunk->target;
1371
1372     return THUNK_AllocLSThunklet( target, relay,
1373                                   ThunkletCallbackGlueLS, task );
1374 }
1375
1376 /***********************************************************************
1377  *     AllocSLThunkletCallbackEx           (KERNEL.568)
1378  */
1379 SEGPTR WINAPI AllocSLThunkletCallbackEx16( FARPROC target,
1380                                          DWORD relay, HTASK16 task )
1381 {
1382     THUNKLET *thunk = (THUNKLET *)target;
1383     if ( !thunk ) return 0;
1384
1385     if (   IsLSThunklet( thunk ) && thunk->relay == relay
1386         && thunk->glue == (DWORD)ThunkletCallbackGlueLS - (DWORD)&thunk->type )
1387         return (SEGPTR)thunk->target;
1388
1389     return THUNK_AllocSLThunklet( target, relay,
1390                                   ThunkletCallbackGlueSL, task );
1391 }
1392
1393 /***********************************************************************
1394  *     AllocLSThunkletCallback             (KERNEL.561) (KERNEL.606)
1395  */
1396 FARPROC WINAPI AllocLSThunkletCallback16( SEGPTR target, DWORD relay )
1397 {
1398     return AllocLSThunkletCallbackEx16( target, relay, GetCurrentTask() );
1399 }
1400
1401 /***********************************************************************
1402  *     AllocSLThunkletCallback             (KERNEL.562) (KERNEL.605)
1403  */
1404 SEGPTR WINAPI AllocSLThunkletCallback16( FARPROC target, DWORD relay )
1405 {
1406     return AllocSLThunkletCallbackEx16( target, relay, GetCurrentTask() );
1407 }
1408
1409 /***********************************************************************
1410  *     FindLSThunkletCallback              (KERNEL.563) (KERNEL.609)
1411  */
1412 FARPROC WINAPI FindLSThunkletCallback( SEGPTR target, DWORD relay )
1413 {
1414     THUNKLET *thunk = (THUNKLET *)PTR_SEG_TO_LIN( target );
1415     if (   thunk && IsSLThunklet16( thunk ) && thunk->relay == relay
1416         && thunk->glue == (DWORD)ThunkletCallbackGlueSL )
1417         return (FARPROC)thunk->target;
1418
1419     thunk = THUNK_FindThunklet( (DWORD)target, relay,
1420                                 (DWORD)ThunkletCallbackGlueLS,
1421                                 THUNKLET_TYPE_LS );
1422     return (FARPROC)thunk;
1423 }
1424
1425 /***********************************************************************
1426  *     FindSLThunkletCallback              (KERNEL.564) (KERNEL.610)
1427  */
1428 SEGPTR WINAPI FindSLThunkletCallback( FARPROC target, DWORD relay )
1429 {
1430     THUNKLET *thunk = (THUNKLET *)target;
1431     if (   thunk && IsLSThunklet( thunk ) && thunk->relay == relay
1432         && thunk->glue == (DWORD)ThunkletCallbackGlueLS - (DWORD)&thunk->type )
1433         return (SEGPTR)thunk->target;
1434
1435     thunk = THUNK_FindThunklet( (DWORD)target, relay,
1436                                 (DWORD)ThunkletCallbackGlueSL,
1437                                 THUNKLET_TYPE_SL );
1438     return HEAP_GetSegptr( ThunkletHeap, 0, thunk );
1439 }
1440
1441
1442 /***********************************************************************
1443  * Callback Client API
1444  */
1445
1446 #define N_CBC_FIXED    20
1447 #define N_CBC_VARIABLE 10
1448 #define N_CBC_TOTAL    (N_CBC_FIXED + N_CBC_VARIABLE)
1449
1450 static SEGPTR    *CBClientRelay16[ N_CBC_TOTAL ];
1451 static FARPROC *CBClientRelay32[ N_CBC_TOTAL ];
1452
1453 /***********************************************************************
1454  *     RegisterCBClient                    (KERNEL.619)
1455  */
1456 INT16 WINAPI RegisterCBClient16( INT16 wCBCId,
1457                                SEGPTR *relay16, FARPROC *relay32 )
1458 {
1459     /* Search for free Callback ID */
1460     if ( wCBCId == -1 )
1461         for ( wCBCId = N_CBC_FIXED; wCBCId < N_CBC_TOTAL; wCBCId++ )
1462             if ( !CBClientRelay16[ wCBCId ] )
1463                 break;
1464
1465     /* Register Callback ID */
1466     if ( wCBCId > 0 && wCBCId < N_CBC_TOTAL )
1467     {
1468         CBClientRelay16[ wCBCId ] = relay16;
1469         CBClientRelay32[ wCBCId ] = relay32;
1470     }
1471     else
1472         wCBCId = 0;
1473
1474     return wCBCId;
1475 }
1476
1477 /***********************************************************************
1478  *     UnRegisterCBClient                  (KERNEL.622)
1479  */
1480 INT16 WINAPI UnRegisterCBClient16( INT16 wCBCId,
1481                                  SEGPTR *relay16, FARPROC *relay32 )
1482 {
1483     if (    wCBCId >= N_CBC_FIXED && wCBCId < N_CBC_TOTAL
1484          && CBClientRelay16[ wCBCId ] == relay16
1485          && CBClientRelay32[ wCBCId ] == relay32 )
1486     {
1487         CBClientRelay16[ wCBCId ] = 0;
1488         CBClientRelay32[ wCBCId ] = 0;
1489     }
1490     else
1491         wCBCId = 0;
1492
1493     return wCBCId;
1494 }
1495
1496
1497 /***********************************************************************
1498  *     InitCBClient                        (KERNEL.623)
1499  */
1500 void WINAPI InitCBClient16( FARPROC glueLS )
1501 {
1502     HMODULE16 kernel = GetModuleHandle16( "KERNEL" );
1503     SEGPTR glueSL = (SEGPTR)WIN32_GetProcAddress16( kernel, (LPCSTR)604 );
1504
1505     SetThunkletCallbackGlue16( glueLS, glueSL );
1506 }
1507
1508 /***********************************************************************
1509  *     CBClientGlueSL                      (KERNEL.604)
1510  */
1511 void WINAPI CBClientGlueSL( CONTEXT *context )
1512 {
1513     /* Create stack frame */
1514     SEGPTR stackSeg = STACK16_PUSH( THREAD_Current(), 12 );
1515     LPWORD stackLin = PTR_SEG_TO_LIN( stackSeg );
1516     SEGPTR glue;
1517
1518     stackLin[3] = BP_reg( context );
1519     stackLin[2] = SI_reg( context );
1520     stackLin[1] = DI_reg( context );
1521     stackLin[0] = DS_reg( context );
1522
1523     BP_reg( context ) = OFFSETOF( stackSeg ) + 6;
1524     SP_reg( context ) = OFFSETOF( stackSeg ) - 4;
1525     GS_reg( context ) = 0;
1526
1527     /* Jump to 16-bit relay code */
1528     glue = CBClientRelay16[ stackLin[5] ][ stackLin[4] ];
1529     CS_reg ( context ) = SELECTOROF( glue );
1530     EIP_reg( context ) = OFFSETOF  ( glue );
1531 }
1532
1533 /***********************************************************************
1534  *     CBClientThunkSL                      (KERNEL.620)
1535  */
1536 void WINAPI CBClientThunkSL( CONTEXT *context )
1537 {
1538     /* Call 32-bit relay code */
1539     extern DWORD WINAPI CALL32_CBClient( FARPROC proc, LPWORD args, DWORD *esi );
1540
1541     LPWORD args = PTR_SEG_OFF_TO_LIN( SS_reg( context ), BP_reg( context ) );
1542     FARPROC proc = CBClientRelay32[ args[2] ][ args[1] ];
1543
1544     EAX_reg(context) = CALL32_CBClient( proc, args, &ESI_reg( context ) );
1545 }
1546
1547 /***********************************************************************
1548  *     CBClientThunkSLEx                    (KERNEL.621)
1549  */
1550 void WINAPI CBClientThunkSLEx( CONTEXT *context )
1551 {
1552     /* Call 32-bit relay code */
1553     extern DWORD WINAPI CALL32_CBClientEx( FARPROC proc, LPWORD args,
1554                                            DWORD *esi, INT *nArgs );
1555
1556     LPWORD args = PTR_SEG_OFF_TO_LIN( SS_reg( context ), BP_reg( context ) );
1557     FARPROC proc = CBClientRelay32[ args[2] ][ args[1] ];
1558     INT nArgs;
1559     LPWORD stackLin;
1560
1561     EAX_reg(context) = CALL32_CBClientEx( proc, args, &ESI_reg( context ), &nArgs );
1562
1563     /* Restore registers saved by CBClientGlueSL */
1564     stackLin = (LPWORD)((LPBYTE)CURRENT_STACK16 + sizeof(STACK16FRAME) - 4);
1565     BP_reg( context ) = stackLin[3];
1566     SI_reg( context ) = stackLin[2];
1567     DI_reg( context ) = stackLin[1];
1568     DS_reg( context ) = stackLin[0];
1569     SP_reg( context ) += 16+nArgs;
1570
1571     /* Return to caller of CBClient thunklet */
1572     CS_reg ( context ) = stackLin[9];
1573     EIP_reg( context ) = stackLin[8];
1574 }
1575