win32/kernel32.c

   1 /*
   2  * KERNEL32 thunks and other undocumented stuff
   3  *
   4  * Copyright 1997-1998 Marcus Meissner
   5  * Copyright 1998      Ulrich Weigand
   6  */
   7
   8 #include "windows.h"
   9 #include "callback.h"
  10 #include "resource.h"
  11 #include "task.h"
  12 #include "user.h"
  13 #include "heap.h"
  14 #include "module.h"
  15 #include "process.h"
  16 #include "stackframe.h"
  17 #include "heap.h"
  18 #include "selectors.h"
  19 #include "task.h"
  20 #include "win.h"
  21 #include "file.h"
  22 #include "debug.h"
  23 #include "flatthunk.h"
  24 #include "syslevel.h"
  25 #include "winerror.h"
  26
  27
  28 /***********************************************************************
  29  *                                                                     *
  30  *                 Win95 internal thunks                               *
  31  *                                                                     *
  32  ***********************************************************************/
  33
  34 /***********************************************************************
  35  * Generates a FT_Prolog call.
  36  *
  37  *  0FB6D1                  movzbl edx,cl
  38  *  8B1495xxxxxxxx          mov edx,[4*edx + targetTable]
  39  *  68xxxxxxxx              push FT_Prolog
  40  *  C3                      lret
  41  */
  42 static void _write_ftprolog(LPBYTE relayCode ,DWORD *targetTable) {
  43         LPBYTE  x;
  44
  45         x       = relayCode;
  46         *x++    = 0x0f;*x++=0xb6;*x++=0xd1; /* movzbl edx,cl */
  47         *x++    = 0x8B;*x++=0x14;*x++=0x95;*(DWORD**)x= targetTable;
  48         x+=4;   /* mov edx, [4*edx + targetTable] */
  49         *x++    = 0x68; *(DWORD*)x = (DWORD)GetProcAddress32(GetModuleHandle32A("KERNEL32"),"FT_Prolog");
  50         x+=4;   /* push FT_Prolog */
  51         *x++    = 0xC3;         /* lret */
  52         /* fill rest with 0xCC / int 3 */
  53 }
  54
  55 /***********************************************************************
  56  *      _write_qtthunk                                  (internal)
  57  * Generates a QT_Thunk style call.
  58  *
  59  *  33C9                    xor ecx, ecx
  60  *  8A4DFC                  mov cl , [ebp-04]
  61  *  8B148Dxxxxxxxx          mov edx, [4*ecx + targetTable]
  62  *  B8yyyyyyyy              mov eax, QT_Thunk
  63  *  FFE0                    jmp eax
  64  */
  65 static void _write_qtthunk(
  66         LPBYTE relayCode,       /* [in] start of QT_Thunk stub */
  67         DWORD *targetTable      /* [in] start of thunk (for index lookup) */
  68 ) {
  69         LPBYTE  x;
  70
  71         x       = relayCode;
  72         *x++    = 0x33;*x++=0xC9; /* xor ecx,ecx */
  73         *x++    = 0x8A;*x++=0x4D;*x++=0xFC; /* movb cl,[ebp-04] */
  74         *x++    = 0x8B;*x++=0x14;*x++=0x8D;*(DWORD**)x= targetTable;
  75         x+=4;   /* mov edx, [4*ecx + targetTable */
  76         *x++    = 0xB8; *(DWORD*)x = (DWORD)GetProcAddress32(GetModuleHandle32A("KERNEL32"),"QT_Thunk");
  77         x+=4;   /* mov eax , QT_Thunk */
  78         *x++    = 0xFF; *x++ = 0xE0;    /* jmp eax */
  79         /* should fill the rest of the 32 bytes with 0xCC */
  80 }
  81
  82 /***********************************************************************
  83  *           _loadthunk
  84  */
  85 static LPVOID _loadthunk(LPCSTR module, LPCSTR func, LPCSTR module32,
  86                          struct ThunkDataCommon *TD32, DWORD checksum)
  87 {
  88     struct ThunkDataCommon *TD16;
  89     HMODULE32 hmod;
  90     int ordinal;
  91
  92     if ((hmod = LoadLibrary16(module)) <= 32)
  93     {
  94         ERR(thunk, "(%s, %s, %s): Unable to load '%s', error %d\n",
  95                    module, func, module32, module, hmod);
  96         return 0;
  97     }
  98
  99     if (   !(ordinal = NE_GetOrdinal(hmod, func))
 100         || !(TD16 = PTR_SEG_TO_LIN(NE_GetEntryPointEx(hmod, ordinal, FALSE))))
 101     {
 102         ERR(thunk, "(%s, %s, %s): Unable to find '%s'\n",
 103                    module, func, module32, func);
 104         return 0;
 105     }
 106
 107     if (TD32 && memcmp(TD16->magic, TD32->magic, 4))
 108     {
 109         ERR(thunk, "(%s, %s, %s): Bad magic %c%c%c%c (should be %c%c%c%c)\n",
 110                    module, func, module32,
 111                    TD16->magic[0], TD16->magic[1], TD16->magic[2], TD16->magic[3],
 112                    TD32->magic[0], TD32->magic[1], TD32->magic[2], TD32->magic[3]);
 113         return 0;
 114     }
 115
 116     if (TD32 && TD16->checksum != TD32->checksum)
 117     {
 118         ERR(thunk, "(%s, %s, %s): Wrong checksum %08lx (should be %08lx)\n",
 119                    module, func, module32, TD16->checksum, TD32->checksum);
 120         return 0;
 121     }
 122
 123     if (!TD32 && checksum && checksum != *(LPDWORD)TD16)
 124     {
 125         ERR(thunk, "(%s, %s, %s): Wrong checksum %08lx (should be %08lx)\n",
 126                    module, func, module32, *(LPDWORD)TD16, checksum);
 127         return 0;
 128     }
 129
 130     return TD16;
 131 }
 132
 133 /***********************************************************************
 134  *           GetThunkStuff    (KERNEL32.53)
 135  */
 136 LPVOID WINAPI GetThunkStuff(LPSTR module, LPSTR func)
 137 {
 138     return _loadthunk(module, func, "<kernel>", NULL, 0L);
 139 }
 140
 141 /***********************************************************************
 142  *           GetThunkBuff    (KERNEL32.52)
 143  * Returns a pointer to ThkBuf in the 16bit library SYSTHUNK.DLL.
 144  */
 145 LPVOID WINAPI GetThunkBuff(void)
 146 {
 147     return GetThunkStuff("SYSTHUNK.DLL", "ThkBuf");
 148 }
 149
 150 /***********************************************************************
 151  *              ThunkConnect32          (KERNEL32)
 152  * Connects a 32bit and a 16bit thunkbuffer.
 153  */
 154 UINT32 WINAPI ThunkConnect32(
 155         struct ThunkDataCommon *TD,  /* [in/out] thunkbuffer */
 156         LPSTR thunkfun16,            /* [in] win16 thunkfunction */
 157         LPSTR module16,              /* [in] name of win16 dll */
 158         LPSTR module32,              /* [in] name of win32 dll */
 159         HMODULE32 hmod32,            /* [in] hmodule of win32 dll */
 160         DWORD dwReason               /* [in] initialisation argument */
 161 ) {
 162     BOOL32 directionSL;
 163
 164     if (!lstrncmp32A(TD->magic, "SL01", 4))
 165     {
 166         directionSL = TRUE;
 167
 168         TRACE(thunk, "SL01 thunk %s (%lx) <- %s (%s), Reason: %ld\n",
 169                      module32, (DWORD)TD, module16, thunkfun16, dwReason);
 170     }
 171     else if (!lstrncmp32A(TD->magic, "LS01", 4))
 172     {
 173         directionSL = FALSE;
 174
 175         TRACE(thunk, "LS01 thunk %s (%lx) -> %s (%s), Reason: %ld\n",
 176                      module32, (DWORD)TD, module16, thunkfun16, dwReason);
 177     }
 178     else
 179     {
 180         ERR(thunk, "Invalid magic %c%c%c%c\n",
 181                    TD->magic[0], TD->magic[1], TD->magic[2], TD->magic[3]);
 182         return 0;
 183     }
 184
 185     switch (dwReason)
 186     {
 187         case DLL_PROCESS_ATTACH:
 188         {
 189             struct ThunkDataCommon *TD16;
 190             if (!(TD16 = _loadthunk(module16, thunkfun16, module32, TD, 0L)))
 191                 return 0;
 192
 193             if (directionSL)
 194             {
 195                 struct ThunkDataSL32 *SL32 = (struct ThunkDataSL32 *)TD;
 196                 struct ThunkDataSL16 *SL16 = (struct ThunkDataSL16 *)TD16;
 197                 struct SLTargetDB *tdb;
 198
 199                 if (SL16->fpData == NULL)
 200                 {
 201                     ERR(thunk, "ThunkConnect16 was not called!\n");
 202                     return 0;
 203                 }
 204
 205                 SL32->data = SL16->fpData;
 206
 207                 tdb = HeapAlloc(GetProcessHeap(), 0, sizeof(*tdb));
 208                 tdb->process = PROCESS_Current();
 209                 tdb->targetTable = (DWORD *)(thunkfun16 + SL32->offsetTargetTable);
 210
 211                 tdb->next = SL32->data->targetDB;   /* FIXME: not thread-safe! */
 212                 SL32->data->targetDB = tdb;
 213
 214                 TRACE(thunk, "Process %08lx allocated TargetDB entry for ThunkDataSL %08lx\n",
 215                              (DWORD)PROCESS_Current(), (DWORD)SL32->data);
 216             }
 217             else
 218             {
 219                 struct ThunkDataLS32 *LS32 = (struct ThunkDataLS32 *)TD;
 220                 struct ThunkDataLS16 *LS16 = (struct ThunkDataLS16 *)TD16;
 221
 222                 LS32->targetTable = PTR_SEG_TO_LIN(LS16->targetTable);
 223
 224                 /* write QT_Thunk and FT_Prolog stubs */
 225                 _write_qtthunk ((LPBYTE)TD + LS32->offsetQTThunk,  LS32->targetTable);
 226                 _write_ftprolog((LPBYTE)TD + LS32->offsetFTProlog, LS32->targetTable);
 227             }
 228             break;
 229         }
 230
 231         case DLL_PROCESS_DETACH:
 232             /* FIXME: cleanup */
 233             break;
 234     }
 235
 236     return 1;
 237 }
 238
 239 /**********************************************************************
 240  *              QT_Thunk                        (KERNEL32)
 241  *
 242  * The target address is in EDX.
 243  * The 16 bit arguments start at ESP+4.
 244  * The number of 16bit argumentbytes is EBP-ESP-0x44 (68 Byte thunksetup).
 245  * [ok]
 246  */
 247 REGS_ENTRYPOINT(QT_Thunk)
 248 {
 249     CONTEXT context16;
 250     DWORD argsize;
 251     THDB *thdb = THREAD_Current();
 252
 253     memcpy(&context16,context,sizeof(context16));
 254
 255     CS_reg(&context16)  = HIWORD(EDX_reg(context));
 256     IP_reg(&context16)  = LOWORD(EDX_reg(context));
 257     EBP_reg(&context16) = OFFSETOF( thdb->cur_stack )
 258                            + (WORD)&((STACK16FRAME*)0)->bp;
 259
 260     argsize = EBP_reg(context)-ESP_reg(context)-0x44;
 261
 262     memcpy( ((LPBYTE)THREAD_STACK16(thdb))-argsize,
 263             (LPBYTE)ESP_reg(context)+4, argsize );
 264
 265     EAX_reg(context) = Callbacks->CallRegisterShortProc( &context16, argsize );
 266     EDX_reg(context) = HIWORD(EAX_reg(context));
 267     EAX_reg(context) = LOWORD(EAX_reg(context));
 268 }
 269
 270
 271 /**********************************************************************
 272  *              FT_Prolog                       (KERNEL32.233)
 273  *
 274  * The set of FT_... thunk routines is used instead of QT_Thunk,
 275  * if structures have to be converted from 32-bit to 16-bit
 276  * (change of member alignment, conversion of members).
 277  *
 278  * The thunk function (as created by the thunk compiler) calls
 279  * FT_Prolog at the beginning, to set up a stack frame and
 280  * allocate a 64 byte buffer on the stack.
 281  * The input parameters (target address and some flags) are
 282  * saved for later use by FT_Thunk.
 283  *
 284  * Input:  EDX  16-bit target address (SEGPTR)
 285  *         CX   bits  0..7   target number (in target table)
 286  *              bits  8..9   some flags (unclear???)
 287  *              bits 10..15  number of DWORD arguments
 288  *
 289  * Output: A new stackframe is created, and a 64 byte buffer
 290  *         allocated on the stack. The layout of the stack
 291  *         on return is as follows:
 292  *
 293  *  (ebp+4)  return address to caller of thunk function
 294  *  (ebp)    old EBP
 295  *  (ebp-4)  saved EBX register of caller
 296  *  (ebp-8)  saved ESI register of caller
 297  *  (ebp-12) saved EDI register of caller
 298  *  (ebp-16) saved ECX register, containing flags
 299  *  (ebp-20) bitmap containing parameters that are to be converted
 300  *           by FT_Thunk; it is initialized to 0 by FT_Prolog and
 301  *           filled in by the thunk code before calling FT_Thunk
 302  *  (ebp-24)
 303  *    ...    (unclear)
 304  *  (ebp-44)
 305  *  (ebp-48) saved EAX register of caller (unclear, never restored???)
 306  *  (ebp-52) saved EDX register, containing 16-bit thunk target
 307  *  (ebp-56)
 308  *    ...    (unclear)
 309  *  (ebp-64)
 310  *
 311  *  ESP is EBP-68 on return.
 312  *
 313  */
 314
 315 REGS_ENTRYPOINT(FT_Prolog)
 316 {
 317     /* Pop return address to thunk code */
 318     EIP_reg(context) = STACK32_POP(context);
 319
 320     /* Build stack frame */
 321     STACK32_PUSH(context, EBP_reg(context));
 322     EBP_reg(context) = ESP_reg(context);
 323
 324     /* Allocate 64-byte Thunk Buffer */
 325     ESP_reg(context) -= 64;
 326     memset((char *)ESP_reg(context), '\0', 64);
 327
 328     /* Store Flags (ECX) and Target Address (EDX) */
 329     /* Save other registers to be restored later */
 330     *(DWORD *)(EBP_reg(context) -  4) = EBX_reg(context);
 331     *(DWORD *)(EBP_reg(context) -  8) = ESI_reg(context);
 332     *(DWORD *)(EBP_reg(context) - 12) = EDI_reg(context);
 333     *(DWORD *)(EBP_reg(context) - 16) = ECX_reg(context);
 334
 335     *(DWORD *)(EBP_reg(context) - 48) = EAX_reg(context);
 336     *(DWORD *)(EBP_reg(context) - 52) = EDX_reg(context);
 337
 338     /* Push return address back onto stack */
 339     STACK32_PUSH(context, EIP_reg(context));
 340 }
 341
 342 /**********************************************************************
 343  *              FT_Thunk                        (KERNEL32.234)
 344  *
 345  * This routine performs the actual call to 16-bit code,
 346  * similar to QT_Thunk. The differences are:
 347  *  - The call target is taken from the buffer created by FT_Prolog
 348  *  - Those arguments requested by the thunk code (by setting the
 349  *    corresponding bit in the bitmap at EBP-20) are converted
 350  *    from 32-bit pointers to segmented pointers (those pointers
 351  *    are guaranteed to point to structures copied to the stack
 352  *    by the thunk code, so we always use the 16-bit stack selector
 353  *    for those addresses).
 354  *
 355  *    The bit #i of EBP-20 corresponds here to the DWORD starting at
 356  *    ESP+4 + 2*i.
 357  *
 358  * FIXME: It is unclear what happens if there are more than 32 WORDs
 359  *        of arguments, so that the single DWORD bitmap is no longer
 360  *        sufficient ...
 361  */
 362
 363 REGS_ENTRYPOINT(FT_Thunk)
 364 {
 365     DWORD mapESPrelative = *(DWORD *)(EBP_reg(context) - 20);
 366     DWORD callTarget     = *(DWORD *)(EBP_reg(context) - 52);
 367
 368     CONTEXT context16;
 369     DWORD i, argsize;
 370     LPBYTE newstack, oldstack;
 371     THDB *thdb = THREAD_Current();
 372
 373     memcpy(&context16,context,sizeof(context16));
 374
 375     CS_reg(&context16)  = HIWORD(callTarget);
 376     IP_reg(&context16)  = LOWORD(callTarget);
 377     EBP_reg(&context16) = OFFSETOF( thdb->cur_stack )
 378                            + (WORD)&((STACK16FRAME*)0)->bp;
 379
 380     argsize  = EBP_reg(context)-ESP_reg(context)-0x44;
 381     newstack = ((LPBYTE)THREAD_STACK16(thdb))-argsize;
 382     oldstack = (LPBYTE)ESP_reg(context)+4;
 383
 384     memcpy( newstack, oldstack, argsize );
 385
 386     for (i = 0; i < 32; i++)    /* NOTE: What about > 32 arguments? */
 387         if (mapESPrelative & (1 << i))
 388         {
 389             SEGPTR *arg = (SEGPTR *)(newstack + 2*i);
 390             *arg = PTR_SEG_OFF_TO_SEGPTR(SELECTOROF(thdb->cur_stack),
 391                                          OFFSETOF(thdb->cur_stack) - argsize
 392                                          + (*(LPBYTE *)arg - oldstack));
 393         }
 394
 395     EAX_reg(context) = Callbacks->CallRegisterShortProc( &context16, argsize );
 396     EDX_reg(context) = HIWORD(EAX_reg(context));
 397     EAX_reg(context) = LOWORD(EAX_reg(context));
 398 }
 399
 400 /**********************************************************************
 401  *              FT_ExitNN               (KERNEL32.218 - 232)
 402  *
 403  * One of the FT_ExitNN functions is called at the end of the thunk code.
 404  * It removes the stack frame created by FT_Prolog, moves the function
 405  * return from EBX to EAX (yes, FT_Thunk did use EAX for the return
 406  * value, but the thunk code has moved it from EAX to EBX in the
 407  * meantime ... :-), restores the caller's EBX, ESI, and EDI registers,
 408  * and perform a return to the CALLER of the thunk code (while removing
 409  * the given number of arguments from the caller's stack).
 410  */
 411
 412 static void FT_Exit(CONTEXT *context, int nPopArgs)
 413 {
 414     /* Return value is in EBX */
 415     EAX_reg(context) = EBX_reg(context);
 416
 417     /* Restore EBX, ESI, and EDI registers */
 418     EBX_reg(context) = *(DWORD *)(EBP_reg(context) -  4);
 419     ESI_reg(context) = *(DWORD *)(EBP_reg(context) -  8);
 420     EDI_reg(context) = *(DWORD *)(EBP_reg(context) - 12);
 421
 422     /* Clean up stack frame */
 423     ESP_reg(context) = EBP_reg(context);
 424     EBP_reg(context) = STACK32_POP(context);
 425
 426     /* Pop return address to CALLER of thunk code */
 427     EIP_reg(context) = STACK32_POP(context);
 428     /* Remove arguments */
 429     ESP_reg(context) += nPopArgs;
 430     /* Push return address back onto stack */
 431     STACK32_PUSH(context, EIP_reg(context));
 432 }
 433
 434 REGS_ENTRYPOINT(FT_Exit0)  { FT_Exit(context,  0); }
 435 REGS_ENTRYPOINT(FT_Exit4)  { FT_Exit(context,  4); }
 436 REGS_ENTRYPOINT(FT_Exit8)  { FT_Exit(context,  8); }
 437 REGS_ENTRYPOINT(FT_Exit12) { FT_Exit(context, 12); }
 438 REGS_ENTRYPOINT(FT_Exit16) { FT_Exit(context, 16); }
 439 REGS_ENTRYPOINT(FT_Exit20) { FT_Exit(context, 20); }
 440 REGS_ENTRYPOINT(FT_Exit24) { FT_Exit(context, 24); }
 441 REGS_ENTRYPOINT(FT_Exit28) { FT_Exit(context, 28); }
 442 REGS_ENTRYPOINT(FT_Exit32) { FT_Exit(context, 32); }
 443 REGS_ENTRYPOINT(FT_Exit36) { FT_Exit(context, 36); }
 444 REGS_ENTRYPOINT(FT_Exit40) { FT_Exit(context, 40); }
 445 REGS_ENTRYPOINT(FT_Exit44) { FT_Exit(context, 44); }
 446 REGS_ENTRYPOINT(FT_Exit48) { FT_Exit(context, 48); }
 447 REGS_ENTRYPOINT(FT_Exit52) { FT_Exit(context, 52); }
 448 REGS_ENTRYPOINT(FT_Exit56) { FT_Exit(context, 56); }
 449
 450
 451 /**********************************************************************
 452  *           WOWCallback16 (KERNEL32.62)(WOW32.2)
 453  * Calls a win16 function with a single DWORD argument.
 454  * RETURNS
 455  *      the return value
 456  */
 457 DWORD WINAPI WOWCallback16(
 458         FARPROC16 fproc,        /* [in] win16 function to call */
 459         DWORD arg               /* [in] single DWORD argument to function */
 460 ) {
 461         DWORD   ret;
 462         TRACE(thunk,"(%p,0x%08lx)...\n",fproc,arg);
 463         ret =  Callbacks->CallWOWCallbackProc(fproc,arg);
 464         TRACE(thunk,"... returns %ld\n",ret);
 465         return ret;
 466 }
 467
 468 /**********************************************************************
 469  *           WOWCallback16Ex (KERNEL32.55)(WOW32.3)
 470  * Calls a function in 16bit code.
 471  * RETURNS
 472  *      TRUE for success
 473  */
 474 BOOL32 WINAPI WOWCallback16Ex(
 475         FARPROC16 vpfn16,       /* [in] win16 function to call */
 476         DWORD dwFlags,          /* [in] flags */
 477         DWORD cbArgs,           /* [in] nr of arguments */
 478         LPVOID pArgs,           /* [in] pointer to arguments (LPDWORD) */
 479         LPDWORD pdwRetCode      /* [out] return value of win16 function */
 480 ) {
 481         return Callbacks->CallWOWCallback16Ex(vpfn16,dwFlags,cbArgs,pArgs,pdwRetCode);
 482 }
 483
 484 /***********************************************************************
 485  *              ThunkInitLS     (KERNEL32.43)
 486  * A thunkbuffer link routine
 487  * The thunkbuf looks like:
 488  *
 489  *      00: DWORD       length          ? don't know exactly
 490  *      04: SEGPTR      ptr             ? where does it point to?
 491  * The pointer ptr is written into the first DWORD of 'thunk'.
 492  * (probably correct implemented)
 493  * [ok probably]
 494  * RETURNS
 495  *      segmented pointer to thunk?
 496  */
 497 DWORD WINAPI ThunkInitLS(
 498         LPDWORD thunk,  /* [in] win32 thunk */
 499         LPCSTR thkbuf,  /* [in] thkbuffer name in win16 dll */
 500         DWORD len,      /* [in] thkbuffer length */
 501         LPCSTR dll16,   /* [in] name of win16 dll */
 502         LPCSTR dll32    /* [in] name of win32 dll (FIXME: not used?) */
 503 ) {
 504         LPDWORD         addr;
 505
 506         if (!(addr = _loadthunk( dll16, thkbuf, dll32, NULL, len )))
 507                 return 0;
 508
 509         if (!addr[1])
 510                 return 0;
 511         *(DWORD*)thunk = addr[1];
 512
 513         return addr[1];
 514 }
 515
 516 /***********************************************************************
 517  *              Common32ThkLS   (KERNEL32.45)
 518  *
 519  * This is another 32->16 thunk, independent of the QT_Thunk/FT_Thunk
 520  * style thunks. The basic difference is that the parameter conversion
 521  * is done completely on the *16-bit* side here. Thus we do not call
 522  * the 16-bit target directly, but call a common entry point instead.
 523  * This entry function then calls the target according to the target
 524  * number passed in the DI register.
 525  *
 526  * Input:  EAX    SEGPTR to the common 16-bit entry point
 527  *         CX     offset in thunk table (target number * 4)
 528  *         DX     error return value if execution fails (unclear???)
 529  *         EDX.HI number of DWORD parameters
 530  *
 531  * (Note that we need to move the thunk table offset from CX to DI !)
 532  *
 533  * The called 16-bit stub expects its stack to look like this:
 534  *     ...
 535  *   (esp+40)  32-bit arguments
 536  *     ...
 537  *   (esp+8)   32 byte of stack space available as buffer
 538  *   (esp)     8 byte return address for use with 0x66 lret
 539  *
 540  * The called 16-bit stub uses a 0x66 lret to return to 32-bit code,
 541  * and uses the EAX register to return a DWORD return value.
 542  * Thus we need to use a special assembly glue routine
 543  * (CallRegisterLongProc instead of CallRegisterShortProc).
 544  *
 545  * Finally, we return to the caller, popping the arguments off
 546  * the stack.
 547  *
 548  * FIXME: The called function uses EBX to return the number of
 549  *        arguments that are to be popped off the caller's stack.
 550  *        This is clobbered by the assembly glue, so we simply use
 551  *        the original EDX.HI to get the number of arguments.
 552  *        (Those two values should be equal anyway ...?)
 553  *
 554  */
 555 REGS_ENTRYPOINT(Common32ThkLS)
 556 {
 557     CONTEXT context16;
 558     DWORD argsize;
 559     THDB *thdb = THREAD_Current();
 560
 561     memcpy(&context16,context,sizeof(context16));
 562
 563     DI_reg(&context16)  = CX_reg(context);
 564     CS_reg(&context16)  = HIWORD(EAX_reg(context));
 565     IP_reg(&context16)  = LOWORD(EAX_reg(context));
 566     EBP_reg(&context16) = OFFSETOF( thdb->cur_stack )
 567                            + (WORD)&((STACK16FRAME*)0)->bp;
 568
 569     argsize = HIWORD(EDX_reg(context)) * 4;
 570
 571     /* FIXME: hack for stupid USER32 CallbackGlueLS routine */
 572     if (EDX_reg(context) == EIP_reg(context))
 573         argsize = 6 * 4;
 574
 575     memcpy( ((LPBYTE)THREAD_STACK16(thdb))-argsize,
 576             (LPBYTE)ESP_reg(context)+4, argsize );
 577
 578     EAX_reg(context) = Callbacks->CallRegisterLongProc(&context16, argsize + 32);
 579
 580     /* Clean up caller's stack frame */
 581
 582     EIP_reg(context) = STACK32_POP(context);
 583     ESP_reg(context) += argsize;
 584     STACK32_PUSH(context, EIP_reg(context));
 585 }
 586
 587 /***********************************************************************
 588  *              OT_32ThkLSF     (KERNEL32.40)
 589  *
 590  * YET Another 32->16 thunk. The difference to Common32ThkLS is that
 591  * argument processing is done on both the 32-bit and the 16-bit side:
 592  * The 32-bit side prepares arguments, copying them onto the stack.
 593  *
 594  * When this routine is called, the first word on the stack is the
 595  * number of argument bytes prepared by the 32-bit code, and EDX
 596  * contains the 16-bit target address.
 597  *
 598  * The called 16-bit routine is another relaycode, doing further
 599  * argument processing and then calling the real 16-bit target
 600  * whose address is stored at [bp-04].
 601  *
 602  * The call proceeds using a normal CallRegisterShortProc.
 603  * After return from the 16-bit relaycode, the arguments need
 604  * to be copied *back* to the 32-bit stack, since the 32-bit
 605  * relaycode processes output parameters.
 606  *
 607  * Note that we copy twice the number of arguments, since some of the
 608  * 16-bit relaycodes in SYSTHUNK.DLL directly access the original
 609  * arguments of the caller!
 610  *
 611  * (Note that this function seems only to be used for
 612  *  OLECLI32 -> OLECLI and OLESVR32 -> OLESVR thunking.)
 613  */
 614 REGS_ENTRYPOINT(OT_32ThkLSF)
 615 {
 616     CONTEXT context16;
 617     DWORD argsize;
 618     THDB *thdb = THREAD_Current();
 619
 620     memcpy(&context16,context,sizeof(context16));
 621
 622     CS_reg(&context16)  = HIWORD(EDX_reg(context));
 623     IP_reg(&context16)  = LOWORD(EDX_reg(context));
 624     EBP_reg(&context16) = OFFSETOF( thdb->cur_stack )
 625                            + (WORD)&((STACK16FRAME*)0)->bp;
 626
 627     argsize = 2 * *(WORD *)(ESP_reg(context) + 4) + 2;
 628
 629     memcpy( ((LPBYTE)THREAD_STACK16(thdb))-argsize,
 630             (LPBYTE)ESP_reg(context)+4, argsize );
 631
 632     EAX_reg(context) = Callbacks->CallRegisterShortProc(&context16, argsize);
 633
 634     memcpy( (LPBYTE)ESP_reg(context)+4,
 635             ((LPBYTE)THREAD_STACK16(thdb))-argsize, argsize );
 636 }
 637
 638 /***********************************************************************
 639  *              ThunkInitLSF            (KERNEL32.41)
 640  * A thunk setup routine.
 641  * Expects a pointer to a preinitialized thunkbuffer in the first argument
 642  * looking like:
 643  *      00..03:         unknown (pointer, check _41, _43, _46)
 644  *      04: EB1E                jmp +0x20
 645  *
 646  *      06..23:         unknown (space for replacement code, check .90)
 647  *
 648  *      24:>E800000000          call offset 29
 649  *      29:>58                  pop eax            ( target of call )
 650  *      2A: 2D25000000          sub eax,0x00000025 ( now points to offset 4 )
 651  *      2F: BAxxxxxxxx          mov edx,xxxxxxxx
 652  *      34: 68yyyyyyyy          push KERNEL32.90
 653  *      39: C3                  ret
 654  *
 655  *      3A: EB1E                jmp +0x20
 656  *      3E ... 59:      unknown (space for replacement code?)
 657  *      5A: E8xxxxxxxx          call <32bitoffset xxxxxxxx>
 658  *      5F: 5A                  pop edx
 659  *      60: 81EA25xxxxxx        sub edx, 0x25xxxxxx
 660  *      66: 52                  push edx
 661  *      67: 68xxxxxxxx          push xxxxxxxx
 662  *      6C: 68yyyyyyyy          push KERNEL32.89
 663  *      71: C3                  ret
 664  *      72: end?
 665  * This function checks if the code is there, and replaces the yyyyyyyy entries
 666  * by the functionpointers.
 667  * The thunkbuf looks like:
 668  *
 669  *      00: DWORD       length          ? don't know exactly
 670  *      04: SEGPTR      ptr             ? where does it point to?
 671  * The segpointer ptr is written into the first DWORD of 'thunk'.
 672  * [ok probably]
 673  * RETURNS
 674  *      unclear, pointer to win16 thkbuffer?
 675  */
 676 LPVOID WINAPI ThunkInitLSF(
 677         LPBYTE thunk,   /* [in] win32 thunk */
 678         LPCSTR thkbuf,  /* [in] thkbuffer name in win16 dll */
 679         DWORD len,      /* [in] length of thkbuffer */
 680         LPCSTR dll16,   /* [in] name of win16 dll */
 681         LPCSTR dll32    /* [in] name of win32 dll */
 682 ) {
 683         HMODULE32       hkrnl32 = GetModuleHandle32A("KERNEL32");
 684         LPDWORD         addr,addr2;
 685
 686         /* FIXME: add checks for valid code ... */
 687         /* write pointers to kernel32.89 and kernel32.90 (+ordinal base of 1) */
 688         *(DWORD*)(thunk+0x35) = (DWORD)GetProcAddress32(hkrnl32,(LPSTR)90);
 689         *(DWORD*)(thunk+0x6D) = (DWORD)GetProcAddress32(hkrnl32,(LPSTR)89);
 690
 691
 692         if (!(addr = _loadthunk( dll16, thkbuf, dll32, NULL, len )))
 693                 return 0;
 694
 695         addr2 = PTR_SEG_TO_LIN(addr[1]);
 696         if (HIWORD(addr2))
 697                 *(DWORD*)thunk = (DWORD)addr2;
 698
 699         return addr2;
 700 }
 701
 702 /***********************************************************************
 703  *              FT_PrologPrime                  (KERNEL32.89)
 704  *
 705  * This function is called from the relay code installed by
 706  * ThunkInitLSF. It replaces the location from where it was
 707  * called by a standard FT_Prolog call stub (which is 'primed'
 708  * by inserting the correct target table pointer).
 709  * Finally, it calls that stub.
 710  *
 711  * Input:  ECX    target number + flags (passed through to FT_Prolog)
 712  *        (ESP)   offset of location where target table pointer
 713  *                is stored, relative to the start of the relay code
 714  *        (ESP+4) pointer to start of relay code
 715  *                (this is where the FT_Prolog call stub gets written to)
 716  *
 717  * Note: The two DWORD arguments get popped from the stack.
 718  *
 719  */
 720 REGS_ENTRYPOINT(FT_PrologPrime)
 721 {
 722     DWORD  targetTableOffset = STACK32_POP(context);
 723     LPBYTE relayCode = (LPBYTE)STACK32_POP(context);
 724     DWORD *targetTable = *(DWORD **)(relayCode+targetTableOffset);
 725     DWORD  targetNr = LOBYTE(ECX_reg(context));
 726
 727     _write_ftprolog(relayCode, targetTable);
 728
 729     /* We should actually call the relay code now, */
 730     /* but we skip it and go directly to FT_Prolog */
 731     EDX_reg(context) = targetTable[targetNr];
 732     __regs_FT_Prolog(context);
 733 }
 734
 735 /***********************************************************************
 736  *              QT_ThunkPrime                   (KERNEL32.90)
 737  *
 738  * This function corresponds to FT_PrologPrime, but installs a
 739  * call stub for QT_Thunk instead.
 740  *
 741  * Input: (EBP-4) target number (passed through to QT_Thunk)
 742  *         EDX    target table pointer location offset
 743  *         EAX    start of relay code
 744  *
 745  */
 746 REGS_ENTRYPOINT(QT_ThunkPrime)
 747 {
 748     DWORD  targetTableOffset = EDX_reg(context);
 749     LPBYTE relayCode = (LPBYTE)EAX_reg(context);
 750     DWORD *targetTable = *(DWORD **)(relayCode+targetTableOffset);
 751     DWORD  targetNr = LOBYTE(*(DWORD *)(EBP_reg(context) - 4));
 752
 753     _write_qtthunk(relayCode, targetTable);
 754
 755     /* We should actually call the relay code now, */
 756     /* but we skip it and go directly to QT_Thunk */
 757     EDX_reg(context) = targetTable[targetNr];
 758     __regs_QT_Thunk(context);
 759 }
 760
 761 /***********************************************************************
 762  *                                                      (KERNEL32.46)
 763  * Another thunkbuf link routine.
 764  * The start of the thunkbuf looks like this:
 765  *      00: DWORD       length
 766  *      04: SEGPTR      address for thunkbuffer pointer
 767  * [ok probably]
 768  */
 769 VOID WINAPI ThunkInitSL(
 770         LPBYTE thunk,           /* [in] start of thunkbuffer */
 771         LPCSTR thkbuf,          /* [in] name/ordinal of thunkbuffer in win16 dll */
 772         DWORD len,              /* [in] length of thunkbuffer */
 773         LPCSTR dll16,           /* [in] name of win16 dll containing the thkbuf */
 774         LPCSTR dll32            /* [in] win32 dll. FIXME: strange, unused */
 775 ) {
 776         LPDWORD         addr;
 777
 778         if (!(addr = _loadthunk( dll16, thkbuf, dll32, NULL, len )))
 779                 return;
 780
 781         *(DWORD*)PTR_SEG_TO_LIN(addr[1]) = (DWORD)thunk;
 782 }
 783
 784 /**********************************************************************
 785  *           SSInit             KERNEL.700
 786  * RETURNS
 787  *      TRUE for success.
 788  */
 789 BOOL32 WINAPI SSInit()
 790 {
 791     return TRUE;
 792 }
 793
 794 /**********************************************************************
 795  *           SSOnBigStack       KERNEL32.87
 796  * Check if thunking is initialized (ss selector set up etc.)
 797  * We do that differently, so just return TRUE.
 798  * [ok]
 799  * RETURNS
 800  *      TRUE for success.
 801  */
 802 BOOL32 WINAPI SSOnBigStack()
 803 {
 804     TRACE(thunk, "Yes, thunking is initialized\n");
 805     return TRUE;
 806 }
 807
 808 /**********************************************************************
 809  *           SSCall
 810  * One of the real thunking functions. This one seems to be for 32<->32
 811  * thunks. It should probably be capable of crossing processboundaries.
 812  *
 813  * And YES, I've seen nr=48 (somewhere in the Win95 32<->16 OLE coupling)
 814  * [ok]
 815  */
 816 DWORD WINAPIV SSCall(
 817         DWORD nr,       /* [in] number of argument bytes */
 818         DWORD flags,    /* [in] FIXME: flags ? */
 819         FARPROC32 fun,  /* [in] function to call */
 820         ...             /* [in/out] arguments */
 821 ) {
 822     DWORD i,ret;
 823     DWORD *args = ((DWORD *)&fun) + 1;
 824
 825     if(TRACE_ON(thunk)){
 826       dbg_decl_str(thunk, 256);
 827       for (i=0;i<nr/4;i++)
 828         dsprintf(thunk,"0x%08lx,",args[i]);
 829       TRACE(thunk,"(%ld,0x%08lx,%p,[%s])\n",
 830                     nr,flags,fun,dbg_str(thunk));
 831     }
 832     switch (nr) {
 833     case 0:     ret = fun();
 834                 break;
 835     case 4:     ret = fun(args[0]);
 836                 break;
 837     case 8:     ret = fun(args[0],args[1]);
 838                 break;
 839     case 12:    ret = fun(args[0],args[1],args[2]);
 840                 break;
 841     case 16:    ret = fun(args[0],args[1],args[2],args[3]);
 842                 break;
 843     case 20:    ret = fun(args[0],args[1],args[2],args[3],args[4]);
 844                 break;
 845     case 24:    ret = fun(args[0],args[1],args[2],args[3],args[4],args[5]);
 846                 break;
 847     case 28:    ret = fun(args[0],args[1],args[2],args[3],args[4],args[5],args[6]);
 848                 break;
 849     case 32:    ret = fun(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7]);
 850                 break;
 851     case 36:    ret = fun(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8]);
 852                 break;
 853     case 40:    ret = fun(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8],args[9]);
 854                 break;
 855     case 44:    ret = fun(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8],args[9],args[10]);
 856                 break;
 857     case 48:    ret = fun(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8],args[9],args[10],args[11]);
 858                 break;
 859     default:
 860         WARN(thunk,"Unsupported nr of arguments, %ld\n",nr);
 861         ret = 0;
 862         break;
 863
 864     }
 865     TRACE(thunk," returning %ld ...\n",ret);
 866     return ret;
 867 }
 868
 869 /**********************************************************************
 870  *           W32S_BackTo32                      (KERNEL32.51)
 871  */
 872 REGS_ENTRYPOINT(W32S_BackTo32)
 873 {
 874     LPDWORD stack = (LPDWORD)ESP_reg( context );
 875     FARPROC32 proc = (FARPROC32) stack[0];
 876
 877     EAX_reg( context ) = proc( stack[2], stack[3], stack[4], stack[5], stack[6],
 878                                stack[7], stack[8], stack[9], stack[10], stack[11] );
 879
 880     EIP_reg( context ) = stack[1];
 881 }
 882
 883 /**********************************************************************
 884  *                      AllocSLCallback         (KERNEL32)
 885  *
 886  * Win95 uses some structchains for callbacks. It allocates them
 887  * in blocks of 100 entries, size 32 bytes each, layout:
 888  * blockstart:
 889  *      0:      PTR     nextblockstart
 890  *      4:      entry   *first;
 891  *      8:      WORD    sel ( start points to blockstart)
 892  *      A:      WORD    unknown
 893  * 100xentry:
 894  *      00..17:         Code
 895  *      18:     PDB     *owning_process;
 896  *      1C:     PTR     blockstart
 897  *
 898  * We ignore this for now. (Just a note for further developers)
 899  * FIXME: use this method, so we don't waste selectors...
 900  *
 901  * Following code is then generated by AllocSLCallback. The code is 16 bit, so
 902  * the 0x66 prefix switches from word->long registers.
 903  *
 904  *      665A            pop     edx
 905  *      6668x arg2 x    pushl   <arg2>
 906  *      6652            push    edx
 907  *      EAx arg1 x      jmpf    <arg1>
 908  *
 909  * returns the startaddress of this thunk.
 910  *
 911  * Note, that they look very similair to the ones allocates by THUNK_Alloc.
 912  * RETURNS
 913  *      segmented pointer to the start of the thunk
 914  */
 915 DWORD WINAPI
 916 AllocSLCallback(
 917         DWORD finalizer,        /* [in] finalizer function */
 918         DWORD callback          /* [in] callback function */
 919 ) {
 920         LPBYTE  x,thunk = HeapAlloc( GetProcessHeap(), 0, 32 );
 921         WORD    sel;
 922
 923         x=thunk;
 924         *x++=0x66;*x++=0x5a;                            /* popl edx */
 925         *x++=0x66;*x++=0x68;*(DWORD*)x=finalizer;x+=4;  /* pushl finalizer */
 926         *x++=0x66;*x++=0x52;                            /* pushl edx */
 927         *x++=0xea;*(DWORD*)x=callback;x+=4;             /* jmpf callback */
 928
 929         *(PDB32**)(thunk+18) = PROCESS_Current();
 930
 931         sel = SELECTOR_AllocBlock( thunk , 32, SEGMENT_CODE, FALSE, FALSE );
 932         return (sel<<16)|0;
 933 }
 934
 935 /**********************************************************************
 936  *              FreeSLCallback          (KERNEL32.274)
 937  * Frees the specified 16->32 callback
 938  */
 939 void WINAPI
 940 FreeSLCallback(
 941         DWORD x /* [in] 16 bit callback (segmented pointer?) */
 942 ) {
 943         FIXME(win32,"(0x%08lx): stub\n",x);
 944 }
 945
 946
 947 /**********************************************************************
 948  *              GetTEBSelectorFS        (KERNEL.475)
 949  *      Set the 16-bit %fs to the 32-bit %fs (current TEB selector)
 950  */
 951 VOID WINAPI GetTEBSelectorFS( CONTEXT *context )
 952 {
 953     GET_FS( FS_reg(context) );
 954 }
 955
 956 /**********************************************************************
 957  *              KERNEL_431              (KERNEL.431)
 958  *              IsPeFormat              (W32SYS.2)
 959  * Checks the passed filename if it is a PE format executeable
 960  * RETURNS
 961  *  TRUE, if it is.
 962  *  FALSE if not.
 963  */
 964 BOOL16 WINAPI IsPeFormat(
 965         LPSTR   fn,     /* [in] filename to executeable */
 966         HFILE16 hf16    /* [in] open file, if filename is NULL */
 967 ) {
 968         IMAGE_DOS_HEADER        mzh;
 969         HFILE32                 hf=HFILE16_TO_HFILE32(hf16);
 970         OFSTRUCT                ofs;
 971         DWORD                   xmagic;
 972
 973         if (fn) {
 974                 hf = OpenFile32(fn,&ofs,OF_READ);
 975                 if (hf==HFILE_ERROR32)
 976                         return FALSE;
 977         }
 978         _llseek32(hf,0,SEEK_SET);
 979         if (sizeof(mzh)!=_lread32(hf,&mzh,sizeof(mzh))) {
 980                 _lclose32(hf);
 981                 return FALSE;
 982         }
 983         if (mzh.e_magic!=IMAGE_DOS_SIGNATURE) {
 984                 WARN(dosmem,"File has not got dos signature!\n");
 985                 _lclose32(hf);
 986                 return FALSE;
 987         }
 988         _llseek32(hf,mzh.e_lfanew,SEEK_SET);
 989         if (sizeof(DWORD)!=_lread32(hf,&xmagic,sizeof(DWORD))) {
 990                 _lclose32(hf);
 991                 return FALSE;
 992         }
 993         _lclose32(hf);
 994         return (xmagic == IMAGE_NT_SIGNATURE);
 995 }
 996
 997 /***********************************************************************
 998  *           WOWHandle32                        (KERNEL32.57)(WOW32.16)
 999  * Converts a win16 handle of type into the respective win32 handle.
1000  * We currently just return this handle, since most handles are the same
1001  * for win16 and win32.
1002  * RETURNS
1003  *      The new handle
1004  */
1005 HANDLE32 WINAPI WOWHandle32(
1006         WORD handle,            /* [in] win16 handle */
1007         WOW_HANDLE_TYPE type    /* [in] handle type */
1008 ) {
1009         TRACE(win32,"(0x%04x,%d)\n",handle,type);
1010         return (HANDLE32)handle;
1011 }
1012
1013 /***********************************************************************
1014  *           K32Thk1632Prolog                   (KERNEL32.492)
1015  */
1016 REGS_ENTRYPOINT(K32Thk1632Prolog)
1017 {
1018    LPBYTE code = (LPBYTE)EIP_reg(context) - 5;
1019
1020    /* Arrrgh! SYSTHUNK.DLL just has to re-implement another method
1021       of 16->32 thunks instead of using one of the standard methods!
1022       This means that SYSTHUNK.DLL itself switches to a 32-bit stack,
1023       and does a far call to the 32-bit code segment of OLECLI32/OLESVR32.
1024       Unfortunately, our CallTo/CallFrom mechanism is therefore completely
1025       bypassed, which means it will crash the next time the 32-bit OLE
1026       code thunks down again to 16-bit (this *will* happen!).
1027
1028       The following hack tries to recognize this situation.
1029       This is possible since the called stubs in OLECLI32/OLESVR32 all
1030       look exactly the same:
1031         00   E8xxxxxxxx    call K32Thk1632Prolog
1032         05   FF55FC        call [ebp-04]
1033         08   E8xxxxxxxx    call K32Thk1632Epilog
1034         0D   66CB          retf
1035
1036       If we recognize this situation, we try to simulate the actions
1037       of our CallTo/CallFrom mechanism by copying the 16-bit stack
1038       to our 32-bit stack, creating a proper STACK16FRAME and
1039       updating thdb->cur_stack. */
1040
1041    if (   code[5] == 0xFF && code[6] == 0x55 && code[7] == 0xFC
1042        && code[13] == 0x66 && code[14] == 0xCB)
1043    {
1044       WORD  stackSel  = NtCurrentTeb()->stack_sel;
1045       DWORD stackBase = GetSelectorBase(stackSel);
1046
1047       THDB *thdb = THREAD_Current();
1048       DWORD argSize = EBP_reg(context) - ESP_reg(context);
1049       char *stack16 = (char *)ESP_reg(context);
1050       char *stack32 = (char *)thdb->cur_stack - argSize;
1051       STACK16FRAME *frame16 = (STACK16FRAME *)stack16 - 1;
1052
1053       TRACE(thunk, "before SYSTHUNK hack: EBP: %08lx ESP: %08lx cur_stack: %08lx\n",
1054                    EBP_reg(context), ESP_reg(context), thdb->cur_stack);
1055
1056       memset(frame16, '\0', sizeof(STACK16FRAME));
1057       frame16->frame32 = (STACK32FRAME *)thdb->cur_stack;
1058       frame16->ebp = EBP_reg(context);
1059
1060       memcpy(stack32, stack16, argSize);
1061       thdb->cur_stack = PTR_SEG_OFF_TO_SEGPTR(stackSel, (DWORD)frame16 - stackBase);
1062
1063       ESP_reg(context) = (DWORD)stack32;
1064       EBP_reg(context) = ESP_reg(context) + argSize;
1065
1066       TRACE(thunk, "after  SYSTHUNK hack: EBP: %08lx ESP: %08lx cur_stack: %08lx\n",
1067                    EBP_reg(context), ESP_reg(context), thdb->cur_stack);
1068    }
1069
1070    SYSLEVEL_ReleaseWin16Lock();
1071 }
1072
1073 /***********************************************************************
1074  *           K32Thk1632Epilog                   (KERNEL32.491)
1075  */
1076 REGS_ENTRYPOINT(K32Thk1632Epilog)
1077 {
1078    LPBYTE code = (LPBYTE)EIP_reg(context) - 13;
1079
1080    SYSLEVEL_RestoreWin16Lock();
1081
1082    /* We undo the SYSTHUNK hack if necessary. See K32Thk1632Prolog. */
1083
1084    if (   code[5] == 0xFF && code[6] == 0x55 && code[7] == 0xFC
1085        && code[13] == 0x66 && code[14] == 0xCB)
1086    {
1087       THDB *thdb = THREAD_Current();
1088       STACK16FRAME *frame16 = (STACK16FRAME *)PTR_SEG_TO_LIN(thdb->cur_stack);
1089       char *stack16 = (char *)(frame16 + 1);
1090       DWORD argSize = frame16->ebp - (DWORD)stack16;
1091       char *stack32 = (char *)frame16->frame32 - argSize;
1092
1093       DWORD nArgsPopped = ESP_reg(context) - (DWORD)stack32;
1094
1095       TRACE(thunk, "before SYSTHUNK hack: EBP: %08lx ESP: %08lx cur_stack: %08lx\n",
1096                    EBP_reg(context), ESP_reg(context), thdb->cur_stack);
1097
1098       thdb->cur_stack = (DWORD)frame16->frame32;
1099
1100       ESP_reg(context) = (DWORD)stack16 + nArgsPopped;
1101       EBP_reg(context) = frame16->ebp;
1102
1103       TRACE(thunk, "after  SYSTHUNK hack: EBP: %08lx ESP: %08lx cur_stack: %08lx\n",
1104                    EBP_reg(context), ESP_reg(context), thdb->cur_stack);
1105    }
1106 }
1107
1108 /***********************************************************************
1109  *           UpdateResource32A                 (KERNEL32.707)
1110  */
1111 BOOL32 WINAPI UpdateResource32A(
1112   HANDLE32  hUpdate,
1113   LPCSTR  lpType,
1114   LPCSTR  lpName,
1115   WORD    wLanguage,
1116   LPVOID  lpData,
1117   DWORD   cbData) {
1118
1119   FIXME(win32, ": stub\n");
1120   SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
1121   return FALSE;
1122 }
1123
1124 /***********************************************************************
1125  *           UpdateResource32W                 (KERNEL32.708)
1126  */
1127 BOOL32 WINAPI UpdateResource32W(
1128   HANDLE32  hUpdate,
1129   LPCWSTR lpType,
1130   LPCWSTR lpName,
1131   WORD    wLanguage,
1132   LPVOID  lpData,
1133   DWORD   cbData) {
1134
1135   FIXME(win32, ": stub\n");
1136   SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
1137   return FALSE;
1138 }
1139
1140
1141 /***********************************************************************
1142  *           WaitNamedPipe32A                 [KERNEL32.725]
1143  */
1144 BOOL32 WINAPI WaitNamedPipe32A (LPCSTR lpNamedPipeName, DWORD nTimeOut)
1145 {       FIXME (win32,"%s 0x%08lx\n",lpNamedPipeName,nTimeOut);
1146         SetLastError(ERROR_PIPE_NOT_CONNECTED);
1147         return FALSE;
1148 }
1149 /***********************************************************************
1150  *           WaitNamedPipe32W                 [KERNEL32.726]
1151  */
1152 BOOL32 WINAPI WaitNamedPipe32W (LPCWSTR lpNamedPipeName, DWORD nTimeOut)
1153 {       FIXME (win32,"%s 0x%08lx\n",debugstr_w(lpNamedPipeName),nTimeOut);
1154         SetLastError(ERROR_PIPE_NOT_CONNECTED);
1155         return FALSE;
1156 }