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
   9 #include <string.h>
  10
  11 #include "windef.h"
  12 #include "winbase.h"
  13 #include "wine/winbase16.h"
  14 #include "callback.h"
  15 #include "task.h"
  16 #include "user.h"
  17 #include "heap.h"
  18 #include "module.h"
  19 #include "neexe.h"
  20 #include "process.h"
  21 #include "stackframe.h"
  22 #include "heap.h"
  23 #include "selectors.h"
  24 #include "task.h"
  25 #include "file.h"
  26 #include "debugtools.h"
  27 #include "flatthunk.h"
  28 #include "syslevel.h"
  29 #include "winerror.h"
  30
  31 DECLARE_DEBUG_CHANNEL(dosmem)
  32 DECLARE_DEBUG_CHANNEL(thunk)
  33 DECLARE_DEBUG_CHANNEL(win32)
  34
  35
  36 /***********************************************************************
  37  *                                                                     *
  38  *                 Win95 internal thunks                               *
  39  *                                                                     *
  40  ***********************************************************************/
  41
  42 /***********************************************************************
  43  *           LogApiThk    (KERNEL.423)
  44  */
  45 void WINAPI LogApiThk( LPSTR func )
  46 {
  47     TRACE_(thunk)( "%s\n", debugstr_a(func) );
  48 }
  49
  50 /***********************************************************************
  51  *           LogApiThkLSF    (KERNEL32.42)
  52  *
  53  * NOTE: needs to preserve all registers!
  54  */
  55 void WINAPI LogApiThkLSF( LPSTR func, CONTEXT86 *context )
  56 {
  57     TRACE_(thunk)( "%s\n", debugstr_a(func) );
  58 }
  59
  60 /***********************************************************************
  61  *           LogApiThkSL    (KERNEL32.44)
  62  *
  63  * NOTE: needs to preserve all registers!
  64  */
  65 void WINAPI LogApiThkSL( LPSTR func, CONTEXT86 *context )
  66 {
  67     TRACE_(thunk)( "%s\n", debugstr_a(func) );
  68 }
  69
  70 /***********************************************************************
  71  *           LogCBThkSL    (KERNEL32.47)
  72  *
  73  * NOTE: needs to preserve all registers!
  74  */
  75 void WINAPI LogCBThkSL( LPSTR func, CONTEXT86 *context )
  76 {
  77     TRACE_(thunk)( "%s\n", debugstr_a(func) );
  78 }
  79
  80 /***********************************************************************
  81  * Generates a FT_Prolog call.
  82  *
  83  *  0FB6D1                  movzbl edx,cl
  84  *  8B1495xxxxxxxx          mov edx,[4*edx + targetTable]
  85  *  68xxxxxxxx              push FT_Prolog
  86  *  C3                      lret
  87  */
  88 static void _write_ftprolog(LPBYTE relayCode ,DWORD *targetTable) {
  89         LPBYTE  x;
  90
  91         x       = relayCode;
  92         *x++    = 0x0f;*x++=0xb6;*x++=0xd1; /* movzbl edx,cl */
  93         *x++    = 0x8B;*x++=0x14;*x++=0x95;*(DWORD**)x= targetTable;
  94         x+=4;   /* mov edx, [4*edx + targetTable] */
  95         *x++    = 0x68; *(DWORD*)x = (DWORD)GetProcAddress(GetModuleHandleA("KERNEL32"),"FT_Prolog");
  96         x+=4;   /* push FT_Prolog */
  97         *x++    = 0xC3;         /* lret */
  98         /* fill rest with 0xCC / int 3 */
  99 }
 100
 101 /***********************************************************************
 102  *      _write_qtthunk                                  (internal)
 103  * Generates a QT_Thunk style call.
 104  *
 105  *  33C9                    xor ecx, ecx
 106  *  8A4DFC                  mov cl , [ebp-04]
 107  *  8B148Dxxxxxxxx          mov edx, [4*ecx + targetTable]
 108  *  B8yyyyyyyy              mov eax, QT_Thunk
 109  *  FFE0                    jmp eax
 110  */
 111 static void _write_qtthunk(
 112         LPBYTE relayCode,       /* [in] start of QT_Thunk stub */
 113         DWORD *targetTable      /* [in] start of thunk (for index lookup) */
 114 ) {
 115         LPBYTE  x;
 116
 117         x       = relayCode;
 118         *x++    = 0x33;*x++=0xC9; /* xor ecx,ecx */
 119         *x++    = 0x8A;*x++=0x4D;*x++=0xFC; /* movb cl,[ebp-04] */
 120         *x++    = 0x8B;*x++=0x14;*x++=0x8D;*(DWORD**)x= targetTable;
 121         x+=4;   /* mov edx, [4*ecx + targetTable */
 122         *x++    = 0xB8; *(DWORD*)x = (DWORD)GetProcAddress(GetModuleHandleA("KERNEL32"),"QT_Thunk");
 123         x+=4;   /* mov eax , QT_Thunk */
 124         *x++    = 0xFF; *x++ = 0xE0;    /* jmp eax */
 125         /* should fill the rest of the 32 bytes with 0xCC */
 126 }
 127
 128 /***********************************************************************
 129  *           _loadthunk
 130  */
 131 static LPVOID _loadthunk(LPCSTR module, LPCSTR func, LPCSTR module32,
 132                          struct ThunkDataCommon *TD32, DWORD checksum)
 133 {
 134     struct ThunkDataCommon *TD16;
 135     HMODULE hmod;
 136     int ordinal;
 137
 138     if ((hmod = LoadLibrary16(module)) <= 32)
 139     {
 140         ERR_(thunk)("(%s, %s, %s): Unable to load '%s', error %d\n",
 141                    module, func, module32, module, hmod);
 142         return 0;
 143     }
 144
 145     if (   !(ordinal = NE_GetOrdinal(hmod, func))
 146         || !(TD16 = PTR_SEG_TO_LIN(NE_GetEntryPointEx(hmod, ordinal, FALSE))))
 147     {
 148         ERR_(thunk)("(%s, %s, %s): Unable to find '%s'\n",
 149                    module, func, module32, func);
 150         return 0;
 151     }
 152
 153     if (TD32 && memcmp(TD16->magic, TD32->magic, 4))
 154     {
 155         ERR_(thunk)("(%s, %s, %s): Bad magic %c%c%c%c (should be %c%c%c%c)\n",
 156                    module, func, module32,
 157                    TD16->magic[0], TD16->magic[1], TD16->magic[2], TD16->magic[3],
 158                    TD32->magic[0], TD32->magic[1], TD32->magic[2], TD32->magic[3]);
 159         return 0;
 160     }
 161
 162     if (TD32 && TD16->checksum != TD32->checksum)
 163     {
 164         ERR_(thunk)("(%s, %s, %s): Wrong checksum %08lx (should be %08lx)\n",
 165                    module, func, module32, TD16->checksum, TD32->checksum);
 166         return 0;
 167     }
 168
 169     if (!TD32 && checksum && checksum != *(LPDWORD)TD16)
 170     {
 171         ERR_(thunk)("(%s, %s, %s): Wrong checksum %08lx (should be %08lx)\n",
 172                    module, func, module32, *(LPDWORD)TD16, checksum);
 173         return 0;
 174     }
 175
 176     return TD16;
 177 }
 178
 179 /***********************************************************************
 180  *           GetThunkStuff    (KERNEL32.53)
 181  */
 182 LPVOID WINAPI GetThunkStuff(LPSTR module, LPSTR func)
 183 {
 184     return _loadthunk(module, func, "<kernel>", NULL, 0L);
 185 }
 186
 187 /***********************************************************************
 188  *           GetThunkBuff    (KERNEL32.52)
 189  * Returns a pointer to ThkBuf in the 16bit library SYSTHUNK.DLL.
 190  */
 191 LPVOID WINAPI GetThunkBuff(void)
 192 {
 193     return GetThunkStuff("SYSTHUNK.DLL", "ThkBuf");
 194 }
 195
 196 /***********************************************************************
 197  *              ThunkConnect32          (KERNEL32)
 198  * Connects a 32bit and a 16bit thunkbuffer.
 199  */
 200 UINT WINAPI ThunkConnect32(
 201         struct ThunkDataCommon *TD,  /* [in/out] thunkbuffer */
 202         LPSTR thunkfun16,            /* [in] win16 thunkfunction */
 203         LPSTR module16,              /* [in] name of win16 dll */
 204         LPSTR module32,              /* [in] name of win32 dll */
 205         HMODULE hmod32,            /* [in] hmodule of win32 dll */
 206         DWORD dwReason               /* [in] initialisation argument */
 207 ) {
 208     BOOL directionSL;
 209
 210     if (!strncmp(TD->magic, "SL01", 4))
 211     {
 212         directionSL = TRUE;
 213
 214         TRACE_(thunk)("SL01 thunk %s (%lx) <- %s (%s), Reason: %ld\n",
 215                      module32, (DWORD)TD, module16, thunkfun16, dwReason);
 216     }
 217     else if (!strncmp(TD->magic, "LS01", 4))
 218     {
 219         directionSL = FALSE;
 220
 221         TRACE_(thunk)("LS01 thunk %s (%lx) -> %s (%s), Reason: %ld\n",
 222                      module32, (DWORD)TD, module16, thunkfun16, dwReason);
 223     }
 224     else
 225     {
 226         ERR_(thunk)("Invalid magic %c%c%c%c\n",
 227                    TD->magic[0], TD->magic[1], TD->magic[2], TD->magic[3]);
 228         return 0;
 229     }
 230
 231     switch (dwReason)
 232     {
 233         case DLL_PROCESS_ATTACH:
 234         {
 235             struct ThunkDataCommon *TD16;
 236             if (!(TD16 = _loadthunk(module16, thunkfun16, module32, TD, 0L)))
 237                 return 0;
 238
 239             if (directionSL)
 240             {
 241                 struct ThunkDataSL32 *SL32 = (struct ThunkDataSL32 *)TD;
 242                 struct ThunkDataSL16 *SL16 = (struct ThunkDataSL16 *)TD16;
 243                 struct SLTargetDB *tdb;
 244
 245                 if (SL16->fpData == NULL)
 246                 {
 247                     ERR_(thunk)("ThunkConnect16 was not called!\n");
 248                     return 0;
 249                 }
 250
 251                 SL32->data = SL16->fpData;
 252
 253                 tdb = HeapAlloc(GetProcessHeap(), 0, sizeof(*tdb));
 254                 tdb->process = PROCESS_Current();
 255                 tdb->targetTable = (DWORD *)(thunkfun16 + SL32->offsetTargetTable);
 256
 257                 tdb->next = SL32->data->targetDB;   /* FIXME: not thread-safe! */
 258                 SL32->data->targetDB = tdb;
 259
 260                 TRACE_(thunk)("Process %08lx allocated TargetDB entry for ThunkDataSL %08lx\n",
 261                              (DWORD)PROCESS_Current(), (DWORD)SL32->data);
 262             }
 263             else
 264             {
 265                 struct ThunkDataLS32 *LS32 = (struct ThunkDataLS32 *)TD;
 266                 struct ThunkDataLS16 *LS16 = (struct ThunkDataLS16 *)TD16;
 267
 268                 LS32->targetTable = PTR_SEG_TO_LIN(LS16->targetTable);
 269
 270                 /* write QT_Thunk and FT_Prolog stubs */
 271                 _write_qtthunk ((LPBYTE)TD + LS32->offsetQTThunk,  LS32->targetTable);
 272                 _write_ftprolog((LPBYTE)TD + LS32->offsetFTProlog, LS32->targetTable);
 273             }
 274             break;
 275         }
 276
 277         case DLL_PROCESS_DETACH:
 278             /* FIXME: cleanup */
 279             break;
 280     }
 281
 282     return 1;
 283 }
 284
 285 /**********************************************************************
 286  *              QT_Thunk                        (KERNEL32)
 287  *
 288  * The target address is in EDX.
 289  * The 16 bit arguments start at ESP.
 290  * The number of 16bit argument bytes is EBP-ESP-0x40 (64 Byte thunksetup).
 291  * [ok]
 292  */
 293 void WINAPI QT_Thunk( CONTEXT86 *context )
 294 {
 295     CONTEXT86 context16;
 296     DWORD argsize;
 297
 298     memcpy(&context16,context,sizeof(context16));
 299
 300     CS_reg(&context16)  = HIWORD(EDX_reg(context));
 301     EIP_reg(&context16) = LOWORD(EDX_reg(context));
 302     EBP_reg(&context16) = OFFSETOF( NtCurrentTeb()->cur_stack )
 303                            + (WORD)&((STACK16FRAME*)0)->bp;
 304
 305     argsize = EBP_reg(context)-ESP_reg(context)-0x40;
 306
 307     memcpy( (LPBYTE)CURRENT_STACK16 - argsize,
 308             (LPBYTE)ESP_reg(context), argsize );
 309
 310     EAX_reg(context) = Callbacks->CallRegisterShortProc( &context16, argsize );
 311     EDX_reg(context) = HIWORD(EAX_reg(context));
 312     EAX_reg(context) = LOWORD(EAX_reg(context));
 313 }
 314
 315
 316 /**********************************************************************
 317  *              FT_Prolog                       (KERNEL32.233)
 318  *
 319  * The set of FT_... thunk routines is used instead of QT_Thunk,
 320  * if structures have to be converted from 32-bit to 16-bit
 321  * (change of member alignment, conversion of members).
 322  *
 323  * The thunk function (as created by the thunk compiler) calls
 324  * FT_Prolog at the beginning, to set up a stack frame and
 325  * allocate a 64 byte buffer on the stack.
 326  * The input parameters (target address and some flags) are
 327  * saved for later use by FT_Thunk.
 328  *
 329  * Input:  EDX  16-bit target address (SEGPTR)
 330  *         CX   bits  0..7   target number (in target table)
 331  *              bits  8..9   some flags (unclear???)
 332  *              bits 10..15  number of DWORD arguments
 333  *
 334  * Output: A new stackframe is created, and a 64 byte buffer
 335  *         allocated on the stack. The layout of the stack
 336  *         on return is as follows:
 337  *
 338  *  (ebp+4)  return address to caller of thunk function
 339  *  (ebp)    old EBP
 340  *  (ebp-4)  saved EBX register of caller
 341  *  (ebp-8)  saved ESI register of caller
 342  *  (ebp-12) saved EDI register of caller
 343  *  (ebp-16) saved ECX register, containing flags
 344  *  (ebp-20) bitmap containing parameters that are to be converted
 345  *           by FT_Thunk; it is initialized to 0 by FT_Prolog and
 346  *           filled in by the thunk code before calling FT_Thunk
 347  *  (ebp-24)
 348  *    ...    (unclear)
 349  *  (ebp-44)
 350  *  (ebp-48) saved EAX register of caller (unclear, never restored???)
 351  *  (ebp-52) saved EDX register, containing 16-bit thunk target
 352  *  (ebp-56)
 353  *    ...    (unclear)
 354  *  (ebp-64)
 355  *
 356  *  ESP is EBP-64 after return.
 357  *
 358  */
 359
 360 void WINAPI FT_Prolog( CONTEXT86 *context )
 361 {
 362     /* Build stack frame */
 363     stack32_push(context, EBP_reg(context));
 364     EBP_reg(context) = ESP_reg(context);
 365
 366     /* Allocate 64-byte Thunk Buffer */
 367     ESP_reg(context) -= 64;
 368     memset((char *)ESP_reg(context), '\0', 64);
 369
 370     /* Store Flags (ECX) and Target Address (EDX) */
 371     /* Save other registers to be restored later */
 372     *(DWORD *)(EBP_reg(context) -  4) = EBX_reg(context);
 373     *(DWORD *)(EBP_reg(context) -  8) = ESI_reg(context);
 374     *(DWORD *)(EBP_reg(context) - 12) = EDI_reg(context);
 375     *(DWORD *)(EBP_reg(context) - 16) = ECX_reg(context);
 376
 377     *(DWORD *)(EBP_reg(context) - 48) = EAX_reg(context);
 378     *(DWORD *)(EBP_reg(context) - 52) = EDX_reg(context);
 379 }
 380
 381 /**********************************************************************
 382  *              FT_Thunk                        (KERNEL32.234)
 383  *
 384  * This routine performs the actual call to 16-bit code,
 385  * similar to QT_Thunk. The differences are:
 386  *  - The call target is taken from the buffer created by FT_Prolog
 387  *  - Those arguments requested by the thunk code (by setting the
 388  *    corresponding bit in the bitmap at EBP-20) are converted
 389  *    from 32-bit pointers to segmented pointers (those pointers
 390  *    are guaranteed to point to structures copied to the stack
 391  *    by the thunk code, so we always use the 16-bit stack selector
 392  *    for those addresses).
 393  *
 394  *    The bit #i of EBP-20 corresponds here to the DWORD starting at
 395  *    ESP+4 + 2*i.
 396  *
 397  * FIXME: It is unclear what happens if there are more than 32 WORDs
 398  *        of arguments, so that the single DWORD bitmap is no longer
 399  *        sufficient ...
 400  */
 401
 402 void WINAPI FT_Thunk( CONTEXT86 *context )
 403 {
 404     DWORD mapESPrelative = *(DWORD *)(EBP_reg(context) - 20);
 405     DWORD callTarget     = *(DWORD *)(EBP_reg(context) - 52);
 406
 407     CONTEXT86 context16;
 408     DWORD i, argsize;
 409     LPBYTE newstack, oldstack;
 410
 411     memcpy(&context16,context,sizeof(context16));
 412
 413     CS_reg(&context16)  = HIWORD(callTarget);
 414     EIP_reg(&context16) = LOWORD(callTarget);
 415     EBP_reg(&context16) = OFFSETOF( NtCurrentTeb()->cur_stack )
 416                            + (WORD)&((STACK16FRAME*)0)->bp;
 417
 418     argsize  = EBP_reg(context)-ESP_reg(context)-0x40;
 419     newstack = (LPBYTE)CURRENT_STACK16 - argsize;
 420     oldstack = (LPBYTE)ESP_reg(context);
 421
 422     memcpy( newstack, oldstack, argsize );
 423
 424     for (i = 0; i < 32; i++)    /* NOTE: What about > 32 arguments? */
 425         if (mapESPrelative & (1 << i))
 426         {
 427             SEGPTR *arg = (SEGPTR *)(newstack + 2*i);
 428             *arg = PTR_SEG_OFF_TO_SEGPTR(SELECTOROF(NtCurrentTeb()->cur_stack),
 429                                          OFFSETOF(NtCurrentTeb()->cur_stack) - argsize
 430                                          + (*(LPBYTE *)arg - oldstack));
 431         }
 432
 433     EAX_reg(context) = Callbacks->CallRegisterShortProc( &context16, argsize );
 434     EDX_reg(context) = HIWORD(EAX_reg(context));
 435     EAX_reg(context) = LOWORD(EAX_reg(context));
 436
 437     /* Copy modified buffers back to 32-bit stack */
 438     memcpy( oldstack, newstack, argsize );
 439 }
 440
 441 /**********************************************************************
 442  *              FT_ExitNN               (KERNEL32.218 - 232)
 443  *
 444  * One of the FT_ExitNN functions is called at the end of the thunk code.
 445  * It removes the stack frame created by FT_Prolog, moves the function
 446  * return from EBX to EAX (yes, FT_Thunk did use EAX for the return
 447  * value, but the thunk code has moved it from EAX to EBX in the
 448  * meantime ... :-), restores the caller's EBX, ESI, and EDI registers,
 449  * and perform a return to the CALLER of the thunk code (while removing
 450  * the given number of arguments from the caller's stack).
 451  */
 452
 453 static void FT_Exit(CONTEXT86 *context, int nPopArgs)
 454 {
 455     /* Return value is in EBX */
 456     EAX_reg(context) = EBX_reg(context);
 457
 458     /* Restore EBX, ESI, and EDI registers */
 459     EBX_reg(context) = *(DWORD *)(EBP_reg(context) -  4);
 460     ESI_reg(context) = *(DWORD *)(EBP_reg(context) -  8);
 461     EDI_reg(context) = *(DWORD *)(EBP_reg(context) - 12);
 462
 463     /* Clean up stack frame */
 464     ESP_reg(context) = EBP_reg(context);
 465     EBP_reg(context) = stack32_pop(context);
 466
 467     /* Pop return address to CALLER of thunk code */
 468     EIP_reg(context) = stack32_pop(context);
 469     /* Remove arguments */
 470     ESP_reg(context) += nPopArgs;
 471 }
 472
 473 void WINAPI FT_Exit0 (CONTEXT86 *context) { FT_Exit(context,  0); }
 474 void WINAPI FT_Exit4 (CONTEXT86 *context) { FT_Exit(context,  4); }
 475 void WINAPI FT_Exit8 (CONTEXT86 *context) { FT_Exit(context,  8); }
 476 void WINAPI FT_Exit12(CONTEXT86 *context) { FT_Exit(context, 12); }
 477 void WINAPI FT_Exit16(CONTEXT86 *context) { FT_Exit(context, 16); }
 478 void WINAPI FT_Exit20(CONTEXT86 *context) { FT_Exit(context, 20); }
 479 void WINAPI FT_Exit24(CONTEXT86 *context) { FT_Exit(context, 24); }
 480 void WINAPI FT_Exit28(CONTEXT86 *context) { FT_Exit(context, 28); }
 481 void WINAPI FT_Exit32(CONTEXT86 *context) { FT_Exit(context, 32); }
 482 void WINAPI FT_Exit36(CONTEXT86 *context) { FT_Exit(context, 36); }
 483 void WINAPI FT_Exit40(CONTEXT86 *context) { FT_Exit(context, 40); }
 484 void WINAPI FT_Exit44(CONTEXT86 *context) { FT_Exit(context, 44); }
 485 void WINAPI FT_Exit48(CONTEXT86 *context) { FT_Exit(context, 48); }
 486 void WINAPI FT_Exit52(CONTEXT86 *context) { FT_Exit(context, 52); }
 487 void WINAPI FT_Exit56(CONTEXT86 *context) { FT_Exit(context, 56); }
 488
 489
 490 /***********************************************************************
 491  *              ThunkInitLS     (KERNEL32.43)
 492  * A thunkbuffer link routine
 493  * The thunkbuf looks like:
 494  *
 495  *      00: DWORD       length          ? don't know exactly
 496  *      04: SEGPTR      ptr             ? where does it point to?
 497  * The pointer ptr is written into the first DWORD of 'thunk'.
 498  * (probably correct implemented)
 499  * [ok probably]
 500  * RETURNS
 501  *      segmented pointer to thunk?
 502  */
 503 DWORD WINAPI ThunkInitLS(
 504         LPDWORD thunk,  /* [in] win32 thunk */
 505         LPCSTR thkbuf,  /* [in] thkbuffer name in win16 dll */
 506         DWORD len,      /* [in] thkbuffer length */
 507         LPCSTR dll16,   /* [in] name of win16 dll */
 508         LPCSTR dll32    /* [in] name of win32 dll (FIXME: not used?) */
 509 ) {
 510         LPDWORD         addr;
 511
 512         if (!(addr = _loadthunk( dll16, thkbuf, dll32, NULL, len )))
 513                 return 0;
 514
 515         if (!addr[1])
 516                 return 0;
 517         *(DWORD*)thunk = addr[1];
 518
 519         return addr[1];
 520 }
 521
 522 /***********************************************************************
 523  *              Common32ThkLS   (KERNEL32.45)
 524  *
 525  * This is another 32->16 thunk, independent of the QT_Thunk/FT_Thunk
 526  * style thunks. The basic difference is that the parameter conversion
 527  * is done completely on the *16-bit* side here. Thus we do not call
 528  * the 16-bit target directly, but call a common entry point instead.
 529  * This entry function then calls the target according to the target
 530  * number passed in the DI register.
 531  *
 532  * Input:  EAX    SEGPTR to the common 16-bit entry point
 533  *         CX     offset in thunk table (target number * 4)
 534  *         DX     error return value if execution fails (unclear???)
 535  *         EDX.HI number of DWORD parameters
 536  *
 537  * (Note that we need to move the thunk table offset from CX to DI !)
 538  *
 539  * The called 16-bit stub expects its stack to look like this:
 540  *     ...
 541  *   (esp+40)  32-bit arguments
 542  *     ...
 543  *   (esp+8)   32 byte of stack space available as buffer
 544  *   (esp)     8 byte return address for use with 0x66 lret
 545  *
 546  * The called 16-bit stub uses a 0x66 lret to return to 32-bit code,
 547  * and uses the EAX register to return a DWORD return value.
 548  * Thus we need to use a special assembly glue routine
 549  * (CallRegisterLongProc instead of CallRegisterShortProc).
 550  *
 551  * Finally, we return to the caller, popping the arguments off
 552  * the stack.
 553  *
 554  * FIXME: The called function uses EBX to return the number of
 555  *        arguments that are to be popped off the caller's stack.
 556  *        This is clobbered by the assembly glue, so we simply use
 557  *        the original EDX.HI to get the number of arguments.
 558  *        (Those two values should be equal anyway ...?)
 559  *
 560  */
 561 void WINAPI Common32ThkLS( CONTEXT86 *context )
 562 {
 563     CONTEXT86 context16;
 564     DWORD argsize;
 565
 566     memcpy(&context16,context,sizeof(context16));
 567
 568     DI_reg(&context16)  = CX_reg(context);
 569     CS_reg(&context16)  = HIWORD(EAX_reg(context));
 570     EIP_reg(&context16) = LOWORD(EAX_reg(context));
 571     EBP_reg(&context16) = OFFSETOF( NtCurrentTeb()->cur_stack )
 572                            + (WORD)&((STACK16FRAME*)0)->bp;
 573
 574     argsize = HIWORD(EDX_reg(context)) * 4;
 575
 576     /* FIXME: hack for stupid USER32 CallbackGlueLS routine */
 577     if (EDX_reg(context) == EIP_reg(context))
 578         argsize = 6 * 4;
 579
 580     memcpy( (LPBYTE)CURRENT_STACK16 - argsize,
 581             (LPBYTE)ESP_reg(context), argsize );
 582
 583     EAX_reg(context) = Callbacks->CallRegisterLongProc(&context16, argsize + 32);
 584
 585     /* Clean up caller's stack frame */
 586     ESP_reg(context) += argsize;
 587 }
 588
 589 /***********************************************************************
 590  *              OT_32ThkLSF     (KERNEL32.40)
 591  *
 592  * YET Another 32->16 thunk. The difference to Common32ThkLS is that
 593  * argument processing is done on both the 32-bit and the 16-bit side:
 594  * The 32-bit side prepares arguments, copying them onto the stack.
 595  *
 596  * When this routine is called, the first word on the stack is the
 597  * number of argument bytes prepared by the 32-bit code, and EDX
 598  * contains the 16-bit target address.
 599  *
 600  * The called 16-bit routine is another relaycode, doing further
 601  * argument processing and then calling the real 16-bit target
 602  * whose address is stored at [bp-04].
 603  *
 604  * The call proceeds using a normal CallRegisterShortProc.
 605  * After return from the 16-bit relaycode, the arguments need
 606  * to be copied *back* to the 32-bit stack, since the 32-bit
 607  * relaycode processes output parameters.
 608  *
 609  * Note that we copy twice the number of arguments, since some of the
 610  * 16-bit relaycodes in SYSTHUNK.DLL directly access the original
 611  * arguments of the caller!
 612  *
 613  * (Note that this function seems only to be used for
 614  *  OLECLI32 -> OLECLI and OLESVR32 -> OLESVR thunking.)
 615  */
 616 void WINAPI OT_32ThkLSF( CONTEXT86 *context )
 617 {
 618     CONTEXT86 context16;
 619     DWORD argsize;
 620
 621     memcpy(&context16,context,sizeof(context16));
 622
 623     CS_reg(&context16)  = HIWORD(EDX_reg(context));
 624     EIP_reg(&context16) = LOWORD(EDX_reg(context));
 625     EBP_reg(&context16) = OFFSETOF( NtCurrentTeb()->cur_stack )
 626                            + (WORD)&((STACK16FRAME*)0)->bp;
 627
 628     argsize = 2 * *(WORD *)ESP_reg(context) + 2;
 629
 630     memcpy( (LPBYTE)CURRENT_STACK16 - argsize,
 631             (LPBYTE)ESP_reg(context), argsize );
 632
 633     EAX_reg(context) = Callbacks->CallRegisterShortProc(&context16, argsize);
 634
 635     memcpy( (LPBYTE)ESP_reg(context),
 636             (LPBYTE)CURRENT_STACK16 - argsize, argsize );
 637 }
 638
 639 /***********************************************************************
 640  *              ThunkInitLSF            (KERNEL32.41)
 641  * A thunk setup routine.
 642  * Expects a pointer to a preinitialized thunkbuffer in the first argument
 643  * looking like:
 644  *      00..03:         unknown (pointer, check _41, _43, _46)
 645  *      04: EB1E                jmp +0x20
 646  *
 647  *      06..23:         unknown (space for replacement code, check .90)
 648  *
 649  *      24:>E800000000          call offset 29
 650  *      29:>58                  pop eax            ( target of call )
 651  *      2A: 2D25000000          sub eax,0x00000025 ( now points to offset 4 )
 652  *      2F: BAxxxxxxxx          mov edx,xxxxxxxx
 653  *      34: 68yyyyyyyy          push KERNEL32.90
 654  *      39: C3                  ret
 655  *
 656  *      3A: EB1E                jmp +0x20
 657  *      3E ... 59:      unknown (space for replacement code?)
 658  *      5A: E8xxxxxxxx          call <32bitoffset xxxxxxxx>
 659  *      5F: 5A                  pop edx
 660  *      60: 81EA25xxxxxx        sub edx, 0x25xxxxxx
 661  *      66: 52                  push edx
 662  *      67: 68xxxxxxxx          push xxxxxxxx
 663  *      6C: 68yyyyyyyy          push KERNEL32.89
 664  *      71: C3                  ret
 665  *      72: end?
 666  * This function checks if the code is there, and replaces the yyyyyyyy entries
 667  * by the functionpointers.
 668  * The thunkbuf looks like:
 669  *
 670  *      00: DWORD       length          ? don't know exactly
 671  *      04: SEGPTR      ptr             ? where does it point to?
 672  * The segpointer ptr is written into the first DWORD of 'thunk'.
 673  * [ok probably]
 674  * RETURNS
 675  *      unclear, pointer to win16 thkbuffer?
 676  */
 677 LPVOID WINAPI ThunkInitLSF(
 678         LPBYTE thunk,   /* [in] win32 thunk */
 679         LPCSTR thkbuf,  /* [in] thkbuffer name in win16 dll */
 680         DWORD len,      /* [in] length of thkbuffer */
 681         LPCSTR dll16,   /* [in] name of win16 dll */
 682         LPCSTR dll32    /* [in] name of win32 dll */
 683 ) {
 684         HMODULE hkrnl32 = GetModuleHandleA("KERNEL32");
 685         LPDWORD         addr,addr2;
 686
 687         /* FIXME: add checks for valid code ... */
 688         /* write pointers to kernel32.89 and kernel32.90 (+ordinal base of 1) */
 689         *(DWORD*)(thunk+0x35) = (DWORD)GetProcAddress(hkrnl32,(LPSTR)90);
 690         *(DWORD*)(thunk+0x6D) = (DWORD)GetProcAddress(hkrnl32,(LPSTR)89);
 691
 692
 693         if (!(addr = _loadthunk( dll16, thkbuf, dll32, NULL, len )))
 694                 return 0;
 695
 696         addr2 = PTR_SEG_TO_LIN(addr[1]);
 697         if (HIWORD(addr2))
 698                 *(DWORD*)thunk = (DWORD)addr2;
 699
 700         return addr2;
 701 }
 702
 703 /***********************************************************************
 704  *              FT_PrologPrime                  (KERNEL32.89)
 705  *
 706  * This function is called from the relay code installed by
 707  * ThunkInitLSF. It replaces the location from where it was
 708  * called by a standard FT_Prolog call stub (which is 'primed'
 709  * by inserting the correct target table pointer).
 710  * Finally, it calls that stub.
 711  *
 712  * Input:  ECX    target number + flags (passed through to FT_Prolog)
 713  *        (ESP)   offset of location where target table pointer
 714  *                is stored, relative to the start of the relay code
 715  *        (ESP+4) pointer to start of relay code
 716  *                (this is where the FT_Prolog call stub gets written to)
 717  *
 718  * Note: The two DWORD arguments get popped off the stack.
 719  *
 720  */
 721 void WINAPI FT_PrologPrime( CONTEXT86 *context )
 722 {
 723     DWORD  targetTableOffset;
 724     LPBYTE relayCode;
 725
 726     /* Compensate for the fact that the Wine register relay code thought
 727        we were being called, although we were in fact jumped to */
 728     ESP_reg(context) -= 4;
 729
 730     /* Write FT_Prolog call stub */
 731     targetTableOffset = stack32_pop(context);
 732     relayCode = (LPBYTE)stack32_pop(context);
 733     _write_ftprolog( relayCode, *(DWORD **)(relayCode+targetTableOffset) );
 734
 735     /* Jump to the call stub just created */
 736     EIP_reg(context) = (DWORD)relayCode;
 737 }
 738
 739 /***********************************************************************
 740  *              QT_ThunkPrime                   (KERNEL32.90)
 741  *
 742  * This function corresponds to FT_PrologPrime, but installs a
 743  * call stub for QT_Thunk instead.
 744  *
 745  * Input: (EBP-4) target number (passed through to QT_Thunk)
 746  *         EDX    target table pointer location offset
 747  *         EAX    start of relay code
 748  *
 749  */
 750 void WINAPI QT_ThunkPrime( CONTEXT86 *context )
 751 {
 752     DWORD  targetTableOffset;
 753     LPBYTE relayCode;
 754
 755     /* Compensate for the fact that the Wine register relay code thought
 756        we were being called, although we were in fact jumped to */
 757     ESP_reg(context) -= 4;
 758
 759     /* Write QT_Thunk call stub */
 760     targetTableOffset = EDX_reg(context);
 761     relayCode = (LPBYTE)EAX_reg(context);
 762     _write_qtthunk( relayCode, *(DWORD **)(relayCode+targetTableOffset) );
 763
 764     /* Jump to the call stub just created */
 765     EIP_reg(context) = (DWORD)relayCode;
 766 }
 767
 768 /***********************************************************************
 769  *                                                      (KERNEL32.46)
 770  * Another thunkbuf link routine.
 771  * The start of the thunkbuf looks like this:
 772  *      00: DWORD       length
 773  *      04: SEGPTR      address for thunkbuffer pointer
 774  * [ok probably]
 775  */
 776 VOID WINAPI ThunkInitSL(
 777         LPBYTE thunk,           /* [in] start of thunkbuffer */
 778         LPCSTR thkbuf,          /* [in] name/ordinal of thunkbuffer in win16 dll */
 779         DWORD len,              /* [in] length of thunkbuffer */
 780         LPCSTR dll16,           /* [in] name of win16 dll containing the thkbuf */
 781         LPCSTR dll32            /* [in] win32 dll. FIXME: strange, unused */
 782 ) {
 783         LPDWORD         addr;
 784
 785         if (!(addr = _loadthunk( dll16, thkbuf, dll32, NULL, len )))
 786                 return;
 787
 788         *(DWORD*)PTR_SEG_TO_LIN(addr[1]) = (DWORD)thunk;
 789 }
 790
 791 /**********************************************************************
 792  *           SSInit             KERNEL.700
 793  * RETURNS
 794  *      TRUE for success.
 795  */
 796 BOOL WINAPI SSInit16()
 797 {
 798     return TRUE;
 799 }
 800
 801 /**********************************************************************
 802  *           SSOnBigStack       KERNEL32.87
 803  * Check if thunking is initialized (ss selector set up etc.)
 804  * We do that differently, so just return TRUE.
 805  * [ok]
 806  * RETURNS
 807  *      TRUE for success.
 808  */
 809 BOOL WINAPI SSOnBigStack()
 810 {
 811     TRACE_(thunk)("Yes, thunking is initialized\n");
 812     return TRUE;
 813 }
 814
 815 /**********************************************************************
 816  *           SSConfirmSmallStack     KERNEL.704
 817  *
 818  * Abort if not on small stack.
 819  *
 820  * This must be a register routine as it has to preserve *all* registers.
 821  */
 822 void WINAPI SSConfirmSmallStack( CONTEXT86 *context )
 823 {
 824     /* We are always on the small stack while in 16-bit code ... */
 825 }
 826
 827 /**********************************************************************
 828  *           SSCall
 829  * One of the real thunking functions. This one seems to be for 32<->32
 830  * thunks. It should probably be capable of crossing processboundaries.
 831  *
 832  * And YES, I've seen nr=48 (somewhere in the Win95 32<->16 OLE coupling)
 833  * [ok]
 834  */
 835 DWORD WINAPIV SSCall(
 836         DWORD nr,       /* [in] number of argument bytes */
 837         DWORD flags,    /* [in] FIXME: flags ? */
 838         FARPROC fun,    /* [in] function to call */
 839         ...             /* [in/out] arguments */
 840 ) {
 841     DWORD i,ret;
 842     DWORD *args = ((DWORD *)&fun) + 1;
 843
 844     if(TRACE_ON(thunk))
 845     {
 846       DPRINTF("(%ld,0x%08lx,%p,[",nr,flags,fun);
 847       for (i=0;i<nr/4;i++)
 848           DPRINTF("0x%08lx,",args[i]);
 849       DPRINTF("])\n");
 850     }
 851     switch (nr) {
 852     case 0:     ret = fun();
 853                 break;
 854     case 4:     ret = fun(args[0]);
 855                 break;
 856     case 8:     ret = fun(args[0],args[1]);
 857                 break;
 858     case 12:    ret = fun(args[0],args[1],args[2]);
 859                 break;
 860     case 16:    ret = fun(args[0],args[1],args[2],args[3]);
 861                 break;
 862     case 20:    ret = fun(args[0],args[1],args[2],args[3],args[4]);
 863                 break;
 864     case 24:    ret = fun(args[0],args[1],args[2],args[3],args[4],args[5]);
 865                 break;
 866     case 28:    ret = fun(args[0],args[1],args[2],args[3],args[4],args[5],args[6]);
 867                 break;
 868     case 32:    ret = fun(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7]);
 869                 break;
 870     case 36:    ret = fun(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8]);
 871                 break;
 872     case 40:    ret = fun(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8],args[9]);
 873                 break;
 874     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]);
 875                 break;
 876     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]);
 877                 break;
 878     default:
 879         WARN_(thunk)("Unsupported nr of arguments, %ld\n",nr);
 880         ret = 0;
 881         break;
 882
 883     }
 884     TRACE_(thunk)(" returning %ld ...\n",ret);
 885     return ret;
 886 }
 887
 888 /**********************************************************************
 889  *           W32S_BackTo32                      (KERNEL32.51)
 890  */
 891 void WINAPI W32S_BackTo32( CONTEXT86 *context )
 892 {
 893     LPDWORD stack = (LPDWORD)ESP_reg( context );
 894     FARPROC proc = (FARPROC)EIP_reg(context);
 895
 896     EAX_reg( context ) = proc( stack[1], stack[2], stack[3], stack[4], stack[5],
 897                                stack[6], stack[7], stack[8], stack[9], stack[10] );
 898
 899     EIP_reg( context ) = stack32_pop(context);
 900 }
 901
 902 /**********************************************************************
 903  *                      AllocSLCallback         (KERNEL32)
 904  *
 905  * Win95 uses some structchains for callbacks. It allocates them
 906  * in blocks of 100 entries, size 32 bytes each, layout:
 907  * blockstart:
 908  *      0:      PTR     nextblockstart
 909  *      4:      entry   *first;
 910  *      8:      WORD    sel ( start points to blockstart)
 911  *      A:      WORD    unknown
 912  * 100xentry:
 913  *      00..17:         Code
 914  *      18:     PDB     *owning_process;
 915  *      1C:     PTR     blockstart
 916  *
 917  * We ignore this for now. (Just a note for further developers)
 918  * FIXME: use this method, so we don't waste selectors...
 919  *
 920  * Following code is then generated by AllocSLCallback. The code is 16 bit, so
 921  * the 0x66 prefix switches from word->long registers.
 922  *
 923  *      665A            pop     edx
 924  *      6668x arg2 x    pushl   <arg2>
 925  *      6652            push    edx
 926  *      EAx arg1 x      jmpf    <arg1>
 927  *
 928  * returns the startaddress of this thunk.
 929  *
 930  * Note, that they look very similair to the ones allocates by THUNK_Alloc.
 931  * RETURNS
 932  *      segmented pointer to the start of the thunk
 933  */
 934 DWORD WINAPI
 935 AllocSLCallback(
 936         DWORD finalizer,        /* [in] finalizer function */
 937         DWORD callback          /* [in] callback function */
 938 ) {
 939         LPBYTE  x,thunk = HeapAlloc( GetProcessHeap(), 0, 32 );
 940         WORD    sel;
 941
 942         x=thunk;
 943         *x++=0x66;*x++=0x5a;                            /* popl edx */
 944         *x++=0x66;*x++=0x68;*(DWORD*)x=finalizer;x+=4;  /* pushl finalizer */
 945         *x++=0x66;*x++=0x52;                            /* pushl edx */
 946         *x++=0xea;*(DWORD*)x=callback;x+=4;             /* jmpf callback */
 947
 948         *(PDB**)(thunk+18) = PROCESS_Current();
 949
 950         sel = SELECTOR_AllocBlock( thunk , 32, SEGMENT_CODE, FALSE, FALSE );
 951         return (sel<<16)|0;
 952 }
 953
 954 /**********************************************************************
 955  *              FreeSLCallback          (KERNEL32.274)
 956  * Frees the specified 16->32 callback
 957  */
 958 void WINAPI
 959 FreeSLCallback(
 960         DWORD x /* [in] 16 bit callback (segmented pointer?) */
 961 ) {
 962         FIXME_(win32)("(0x%08lx): stub\n",x);
 963 }
 964
 965
 966 /**********************************************************************
 967  *              GetTEBSelectorFS        (KERNEL.475)
 968  *      Set the 16-bit %fs to the 32-bit %fs (current TEB selector)
 969  */
 970 void WINAPI GetTEBSelectorFS16(void)
 971 {
 972     GET_FS( CURRENT_STACK16->fs );
 973 }
 974
 975 /**********************************************************************
 976  *              KERNEL_431              (KERNEL.431)
 977  *              IsPeFormat              (W32SYS.2)
 978  * Checks the passed filename if it is a PE format executeable
 979  * RETURNS
 980  *  TRUE, if it is.
 981  *  FALSE if not.
 982  */
 983 BOOL16 WINAPI IsPeFormat16(
 984         LPSTR   fn,     /* [in] filename to executeable */
 985         HFILE16 hf16    /* [in] open file, if filename is NULL */
 986 ) {
 987         IMAGE_DOS_HEADER        mzh;
 988         HFILE                 hf=FILE_GetHandle(hf16);
 989         OFSTRUCT                ofs;
 990         DWORD                   xmagic;
 991
 992         if (fn) {
 993                 hf = OpenFile(fn,&ofs,OF_READ);
 994                 if (hf==HFILE_ERROR)
 995                         return FALSE;
 996         }
 997         _llseek(hf,0,SEEK_SET);
 998         if (sizeof(mzh)!=_lread(hf,&mzh,sizeof(mzh))) {
 999                 _lclose(hf);
1000                 return FALSE;
1001         }
1002         if (mzh.e_magic!=IMAGE_DOS_SIGNATURE) {
1003                 WARN_(dosmem)("File has not got dos signature!\n");
1004                 _lclose(hf);
1005                 return FALSE;
1006         }
1007         _llseek(hf,mzh.e_lfanew,SEEK_SET);
1008         if (sizeof(DWORD)!=_lread(hf,&xmagic,sizeof(DWORD))) {
1009                 _lclose(hf);
1010                 return FALSE;
1011         }
1012         _lclose(hf);
1013         return (xmagic == IMAGE_NT_SIGNATURE);
1014 }
1015
1016
1017 /***********************************************************************
1018  *           K32Thk1632Prolog                   (KERNEL32.492)
1019  */
1020 void WINAPI K32Thk1632Prolog( CONTEXT86 *context )
1021 {
1022    LPBYTE code = (LPBYTE)EIP_reg(context) - 5;
1023
1024    /* Arrrgh! SYSTHUNK.DLL just has to re-implement another method
1025       of 16->32 thunks instead of using one of the standard methods!
1026       This means that SYSTHUNK.DLL itself switches to a 32-bit stack,
1027       and does a far call to the 32-bit code segment of OLECLI32/OLESVR32.
1028       Unfortunately, our CallTo/CallFrom mechanism is therefore completely
1029       bypassed, which means it will crash the next time the 32-bit OLE
1030       code thunks down again to 16-bit (this *will* happen!).
1031
1032       The following hack tries to recognize this situation.
1033       This is possible since the called stubs in OLECLI32/OLESVR32 all
1034       look exactly the same:
1035         00   E8xxxxxxxx    call K32Thk1632Prolog
1036         05   FF55FC        call [ebp-04]
1037         08   E8xxxxxxxx    call K32Thk1632Epilog
1038         0D   66CB          retf
1039
1040       If we recognize this situation, we try to simulate the actions
1041       of our CallTo/CallFrom mechanism by copying the 16-bit stack
1042       to our 32-bit stack, creating a proper STACK16FRAME and
1043       updating cur_stack. */
1044
1045    if (   code[5] == 0xFF && code[6] == 0x55 && code[7] == 0xFC
1046        && code[13] == 0x66 && code[14] == 0xCB)
1047    {
1048       WORD  stackSel  = NtCurrentTeb()->stack_sel;
1049       DWORD stackBase = GetSelectorBase(stackSel);
1050
1051       DWORD argSize = EBP_reg(context) - ESP_reg(context);
1052       char *stack16 = (char *)ESP_reg(context) - 4;
1053       char *stack32 = (char *)NtCurrentTeb()->cur_stack - argSize;
1054       STACK16FRAME *frame16 = (STACK16FRAME *)stack16 - 1;
1055
1056       TRACE_(thunk)("before SYSTHUNK hack: EBP: %08lx ESP: %08lx cur_stack: %08lx\n",
1057                    EBP_reg(context), ESP_reg(context), NtCurrentTeb()->cur_stack);
1058
1059       memset(frame16, '\0', sizeof(STACK16FRAME));
1060       frame16->frame32 = (STACK32FRAME *)NtCurrentTeb()->cur_stack;
1061       frame16->ebp = EBP_reg(context);
1062
1063       memcpy(stack32, stack16, argSize);
1064       NtCurrentTeb()->cur_stack = PTR_SEG_OFF_TO_SEGPTR(stackSel, (DWORD)frame16 - stackBase);
1065
1066       ESP_reg(context) = (DWORD)stack32 + 4;
1067       EBP_reg(context) = ESP_reg(context) + argSize;
1068
1069       TRACE_(thunk)("after  SYSTHUNK hack: EBP: %08lx ESP: %08lx cur_stack: %08lx\n",
1070                    EBP_reg(context), ESP_reg(context), NtCurrentTeb()->cur_stack);
1071    }
1072
1073    SYSLEVEL_ReleaseWin16Lock();
1074 }
1075
1076 /***********************************************************************
1077  *           K32Thk1632Epilog                   (KERNEL32.491)
1078  */
1079 void WINAPI K32Thk1632Epilog( CONTEXT86 *context )
1080 {
1081    LPBYTE code = (LPBYTE)EIP_reg(context) - 13;
1082
1083    SYSLEVEL_RestoreWin16Lock();
1084
1085    /* We undo the SYSTHUNK hack if necessary. See K32Thk1632Prolog. */
1086
1087    if (   code[5] == 0xFF && code[6] == 0x55 && code[7] == 0xFC
1088        && code[13] == 0x66 && code[14] == 0xCB)
1089    {
1090       STACK16FRAME *frame16 = (STACK16FRAME *)PTR_SEG_TO_LIN(NtCurrentTeb()->cur_stack);
1091       char *stack16 = (char *)(frame16 + 1);
1092       DWORD argSize = frame16->ebp - (DWORD)stack16;
1093       char *stack32 = (char *)frame16->frame32 - argSize;
1094
1095       DWORD nArgsPopped = ESP_reg(context) - (DWORD)stack32;
1096
1097       TRACE_(thunk)("before SYSTHUNK hack: EBP: %08lx ESP: %08lx cur_stack: %08lx\n",
1098                    EBP_reg(context), ESP_reg(context), NtCurrentTeb()->cur_stack);
1099
1100       NtCurrentTeb()->cur_stack = (DWORD)frame16->frame32;
1101
1102       ESP_reg(context) = (DWORD)stack16 + nArgsPopped;
1103       EBP_reg(context) = frame16->ebp;
1104
1105       TRACE_(thunk)("after  SYSTHUNK hack: EBP: %08lx ESP: %08lx cur_stack: %08lx\n",
1106                    EBP_reg(context), ESP_reg(context), NtCurrentTeb()->cur_stack);
1107    }
1108 }
1109
1110 /***********************************************************************
1111  *           UpdateResource32A                 (KERNEL32.707)
1112  */
1113 BOOL WINAPI UpdateResourceA(
1114   HANDLE  hUpdate,
1115   LPCSTR  lpType,
1116   LPCSTR  lpName,
1117   WORD    wLanguage,
1118   LPVOID  lpData,
1119   DWORD   cbData) {
1120
1121   FIXME_(win32)(": stub\n");
1122   SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
1123   return FALSE;
1124 }
1125
1126 /***********************************************************************
1127  *           UpdateResource32W                 (KERNEL32.708)
1128  */
1129 BOOL WINAPI UpdateResourceW(
1130   HANDLE  hUpdate,
1131   LPCWSTR lpType,
1132   LPCWSTR lpName,
1133   WORD    wLanguage,
1134   LPVOID  lpData,
1135   DWORD   cbData) {
1136
1137   FIXME_(win32)(": stub\n");
1138   SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
1139   return FALSE;
1140 }
1141
1142
1143 /***********************************************************************
1144  *           WaitNamedPipe32A                 [KERNEL32.725]
1145  */
1146 BOOL WINAPI WaitNamedPipeA (LPCSTR lpNamedPipeName, DWORD nTimeOut)
1147 {       FIXME_(win32)("%s 0x%08lx\n",lpNamedPipeName,nTimeOut);
1148         SetLastError(ERROR_PIPE_NOT_CONNECTED);
1149         return FALSE;
1150 }
1151 /***********************************************************************
1152  *           WaitNamedPipe32W                 [KERNEL32.726]
1153  */
1154 BOOL WINAPI WaitNamedPipeW (LPCWSTR lpNamedPipeName, DWORD nTimeOut)
1155 {       FIXME_(win32)("%s 0x%08lx\n",debugstr_w(lpNamedPipeName),nTimeOut);
1156         SetLastError(ERROR_PIPE_NOT_CONNECTED);
1157         return FALSE;
1158 }
1159
1160 /*********************************************************************
1161  *                   PK16FNF [KERNEL32.91]
1162  *
1163  *  This routine fills in the supplied 13-byte (8.3 plus terminator)
1164  *  string buffer with the 8.3 filename of a recently loaded 16-bit
1165  *  module.  It is unknown exactly what modules trigger this
1166  *  mechanism or what purpose this serves.  Win98 Explorer (and
1167  *  probably also Win95 with IE 4 shell integration) calls this
1168  *  several times during initialization.
1169  *
1170  *  FIXME: find out what this really does and make it work.
1171  */
1172 void WINAPI PK16FNF(LPSTR strPtr)
1173 {
1174        FIXME_(win32)("(%p): stub\n", strPtr);
1175
1176        /* fill in a fake filename that'll be easy to recognize */
1177        lstrcpyA(strPtr, "WINESTUB.FIX");
1178 }