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user32: Make GetRegisteredRawInputDevices hotpatchable.
[wine/multimedia.git] / dlls / krnl386.exe16 / thunk.c
blob9e12d2732410a7bd500d667ba88d7fbdd8bc84e7
1 /*
2 * KERNEL32 thunks and other undocumented stuff
3 *
4 * Copyright 1996, 1997 Alexandre Julliard
5 * Copyright 1997, 1998 Marcus Meissner
6 * Copyright 1998 Ulrich Weigand
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
21 */
22
23 #include "config.h"
24 #include "wine/port.h"
25
26 #include <string.h>
27 #include <sys/types.h>
28 #include <stdarg.h>
29 #include <stdio.h>
30 #ifdef HAVE_UNISTD_H
31 # include <unistd.h>
32 #endif
33
34 #include "windef.h"
35 #include "winbase.h"
36 #include "winerror.h"
37 #include "winternl.h"
38 #include "wownt32.h"
39 #include "wine/winbase16.h"
40
41 #include "wine/debug.h"
42 #include "wine/library.h"
43 #include "kernel16_private.h"
44
45 WINE_DEFAULT_DEBUG_CHANNEL(thunk);
46
47 struct ThunkDataCommon
48 {
49 char magic[4]; /* 00 */
50 DWORD checksum; /* 04 */
51 };
52
53 struct ThunkDataLS16
54 {
55 struct ThunkDataCommon common; /* 00 */
56 SEGPTR targetTable; /* 08 */
57 DWORD firstTime; /* 0C */
58 };
59
60 struct ThunkDataLS32
61 {
62 struct ThunkDataCommon common; /* 00 */
63 DWORD * targetTable; /* 08 */
64 char lateBinding[4]; /* 0C */
65 DWORD flags; /* 10 */
66 DWORD reserved1; /* 14 */
67 DWORD reserved2; /* 18 */
68 DWORD offsetQTThunk; /* 1C */
69 DWORD offsetFTProlog; /* 20 */
70 };
71
72 struct ThunkDataSL16
73 {
74 struct ThunkDataCommon common; /* 00 */
75 DWORD flags1; /* 08 */
76 DWORD reserved1; /* 0C */
77 struct ThunkDataSL * fpData; /* 10 */
78 SEGPTR spData; /* 14 */
79 DWORD reserved2; /* 18 */
80 char lateBinding[4]; /* 1C */
81 DWORD flags2; /* 20 */
82 DWORD reserved3; /* 20 */
83 SEGPTR apiDatabase; /* 28 */
84 };
85
86 struct ThunkDataSL32
87 {
88 struct ThunkDataCommon common; /* 00 */
89 DWORD reserved1; /* 08 */
90 struct ThunkDataSL * data; /* 0C */
91 char lateBinding[4]; /* 10 */
92 DWORD flags; /* 14 */
93 DWORD reserved2; /* 18 */
94 DWORD reserved3; /* 1C */
95 DWORD offsetTargetTable; /* 20 */
96 };
97
98 struct ThunkDataSL
99 {
100 #if 0
101 This structure differs from the Win95 original,
102 but this should not matter since it is strictly internal to
103 the thunk handling routines in KRNL386 / KERNEL32.
104
105 For reference, here is the Win95 layout:
106
107 struct ThunkDataCommon common; /* 00 */
108 DWORD flags1; /* 08 */
109 SEGPTR apiDatabase; /* 0C */
110 WORD exePtr; /* 10 */
111 WORD segMBA; /* 12 */
112 DWORD lenMBATotal; /* 14 */
113 DWORD lenMBAUsed; /* 18 */
114 DWORD flags2; /* 1C */
115 char pszDll16[256]; /* 20 */
116 char pszDll32[256]; /*120 */
117
118 We do it differently since all our thunk handling is done
119 by 32-bit code. Therefore we do not need to provide
120 easy access to this data, especially the process target
121 table database, for 16-bit code.
122 #endif
123
124 struct ThunkDataCommon common;
125 DWORD flags1;
126 struct SLApiDB * apiDB;
127 struct SLTargetDB * targetDB;
128 DWORD flags2;
129 char pszDll16[256];
130 char pszDll32[256];
131 };
132
133 struct SLTargetDB
134 {
135 struct SLTargetDB * next;
136 DWORD process;
137 DWORD * targetTable;
138 };
139
140 struct SLApiDB
141 {
142 DWORD nrArgBytes;
143 DWORD errorReturnValue;
144 };
145
146 SEGPTR CALL32_CBClient_RetAddr = 0;
147 SEGPTR CALL32_CBClientEx_RetAddr = 0;
148
149 extern int call_entry_point( void *func, int nb_args, const DWORD *args );
150 extern void __wine_call_from_16_thunk(void);
151 extern void FT_Prolog(void);
152 extern void FT_PrologPrime(void);
153 extern void QT_Thunk(void);
154 extern void QT_ThunkPrime(void);
155
156 /* Push a DWORD on the 32-bit stack */
157 static inline void stack32_push( CONTEXT *context, DWORD val )
158 {
159 context->Esp -= sizeof(DWORD);
160 *(DWORD *)context->Esp = val;
161 }
162
163 /* Pop a DWORD from the 32-bit stack */
164 static inline DWORD stack32_pop( CONTEXT *context )
165 {
166 DWORD ret = *(DWORD *)context->Esp;
167 context->Esp += sizeof(DWORD);
168 return ret;
169 }
170
171 /***********************************************************************
172 * *
173 * Win95 internal thunks *
174 * *
175 ***********************************************************************/
176
177 /***********************************************************************
178 * LogApiThk (KERNEL.423)
179 */
180 void WINAPI LogApiThk( LPSTR func )
181 {
182 TRACE( "%s\n", debugstr_a(func) );
183 }
184
185 /***********************************************************************
186 * LogApiThkLSF (KERNEL32.42)
187 *
188 * NOTE: needs to preserve all registers!
189 */
190 void WINAPI __regs_LogApiThkLSF( LPSTR func, CONTEXT *context )
191 {
192 TRACE( "%s\n", debugstr_a(func) );
193 }
194 DEFINE_REGS_ENTRYPOINT( LogApiThkLSF, 1 )
195
196 /***********************************************************************
197 * LogApiThkSL (KERNEL32.44)
198 *
199 * NOTE: needs to preserve all registers!
200 */
201 void WINAPI __regs_LogApiThkSL( LPSTR func, CONTEXT *context )
202 {
203 TRACE( "%s\n", debugstr_a(func) );
204 }
205 DEFINE_REGS_ENTRYPOINT( LogApiThkSL, 1 )
206
207 /***********************************************************************
208 * LogCBThkSL (KERNEL32.47)
209 *
210 * NOTE: needs to preserve all registers!
211 */
212 void WINAPI __regs_LogCBThkSL( LPSTR func, CONTEXT *context )
213 {
214 TRACE( "%s\n", debugstr_a(func) );
215 }
216 DEFINE_REGS_ENTRYPOINT( LogCBThkSL, 1 )
217
218 /***********************************************************************
219 * Generates a FT_Prolog call.
220 *
221 * 0FB6D1 movzbl edx,cl
222 * 8B1495xxxxxxxx mov edx,[4*edx + targetTable]
223 * 68xxxxxxxx push FT_Prolog
224 * C3 lret
225 */
226 static void _write_ftprolog(LPBYTE relayCode ,DWORD *targetTable) {
227 LPBYTE x;
228
229 x = relayCode;
230 *x++ = 0x0f;*x++=0xb6;*x++=0xd1; /* movzbl edx,cl */
231 *x++ = 0x8B;*x++=0x14;*x++=0x95;*(DWORD**)x= targetTable;
232 x+=4; /* mov edx, [4*edx + targetTable] */
233 *x++ = 0x68; *(void **)x = FT_Prolog;
234 x+=4; /* push FT_Prolog */
235 *x++ = 0xC3; /* lret */
236 /* fill rest with 0xCC / int 3 */
237 }
238
239 /***********************************************************************
240 * _write_qtthunk (internal)
241 * Generates a QT_Thunk style call.
242 *
243 * 33C9 xor ecx, ecx
244 * 8A4DFC mov cl , [ebp-04]
245 * 8B148Dxxxxxxxx mov edx, [4*ecx + targetTable]
246 * B8yyyyyyyy mov eax, QT_Thunk
247 * FFE0 jmp eax
248 */
249 static void _write_qtthunk(
250 LPBYTE relayCode, /* [in] start of QT_Thunk stub */
251 DWORD *targetTable /* [in] start of thunk (for index lookup) */
252 ) {
253 LPBYTE x;
254
255 x = relayCode;
256 *x++ = 0x33;*x++=0xC9; /* xor ecx,ecx */
257 *x++ = 0x8A;*x++=0x4D;*x++=0xFC; /* movb cl,[ebp-04] */
258 *x++ = 0x8B;*x++=0x14;*x++=0x8D;*(DWORD**)x= targetTable;
259 x+=4; /* mov edx, [4*ecx + targetTable */
260 *x++ = 0xB8; *(void **)x = QT_Thunk;
261 x+=4; /* mov eax , QT_Thunk */
262 *x++ = 0xFF; *x++ = 0xE0; /* jmp eax */
263 /* should fill the rest of the 32 bytes with 0xCC */
264 }
265
266 /***********************************************************************
267 * _loadthunk
268 */
269 static LPVOID _loadthunk(LPCSTR module, LPCSTR func, LPCSTR module32,
270 struct ThunkDataCommon *TD32, DWORD checksum)
271 {
272 struct ThunkDataCommon *TD16;
273 HMODULE16 hmod;
274 int ordinal;
275 static BOOL done;
276
277 if (!done)
278 {
279 LoadLibrary16( "gdi.exe" );
280 LoadLibrary16( "user.exe" );
281 done = TRUE;
282 }
283
284 if ((hmod = LoadLibrary16(module)) <= 32)
285 {
286 ERR("(%s, %s, %s): Unable to load '%s', error %d\n",
287 module, func, module32, module, hmod);
288 return 0;
289 }
290
291 if ( !(ordinal = NE_GetOrdinal(hmod, func))
292 || !(TD16 = MapSL((SEGPTR)NE_GetEntryPointEx(hmod, ordinal, FALSE))))
293 {
294 ERR("Unable to find thunk data '%s' in %s, required by %s (conflicting/incorrect DLL versions !?).\n",
295 func, module, module32);
296 return 0;
297 }
298
299 if (TD32 && memcmp(TD16->magic, TD32->magic, 4))
300 {
301 ERR("(%s, %s, %s): Bad magic %c%c%c%c (should be %c%c%c%c)\n",
302 module, func, module32,
303 TD16->magic[0], TD16->magic[1], TD16->magic[2], TD16->magic[3],
304 TD32->magic[0], TD32->magic[1], TD32->magic[2], TD32->magic[3]);
305 return 0;
306 }
307
308 if (TD32 && TD16->checksum != TD32->checksum)
309 {
310 ERR("(%s, %s, %s): Wrong checksum %08x (should be %08x)\n",
311 module, func, module32, TD16->checksum, TD32->checksum);
312 return 0;
313 }
314
315 if (!TD32 && checksum && checksum != *(LPDWORD)TD16)
316 {
317 ERR("(%s, %s, %s): Wrong checksum %08x (should be %08x)\n",
318 module, func, module32, *(LPDWORD)TD16, checksum);
319 return 0;
320 }
321
322 return TD16;
323 }
324
325 /***********************************************************************
326 * GetThunkStuff (KERNEL32.53)
327 */
328 LPVOID WINAPI GetThunkStuff(LPCSTR module, LPCSTR func)
329 {
330 return _loadthunk(module, func, "<kernel>", NULL, 0L);
331 }
332
333 /***********************************************************************
334 * GetThunkBuff (KERNEL32.52)
335 * Returns a pointer to ThkBuf in the 16bit library SYSTHUNK.DLL.
336 */
337 LPVOID WINAPI GetThunkBuff(void)
338 {
339 return GetThunkStuff("SYSTHUNK.DLL", "ThkBuf");
340 }
341
342 /***********************************************************************
343 * ThunkConnect32 (KERNEL32.@)
344 * Connects a 32bit and a 16bit thunkbuffer.
345 */
346 UINT WINAPI ThunkConnect32(
347 struct ThunkDataCommon *TD, /* [in/out] thunkbuffer */
348 LPSTR thunkfun16, /* [in] win16 thunkfunction */
349 LPSTR module16, /* [in] name of win16 dll */
350 LPSTR module32, /* [in] name of win32 dll */
351 HMODULE hmod32, /* [in] hmodule of win32 dll */
352 DWORD dwReason /* [in] initialisation argument */
353 ) {
354 BOOL directionSL;
355
356 if (!strncmp(TD->magic, "SL01", 4))
357 {
358 directionSL = TRUE;
359
360 TRACE("SL01 thunk %s (%p) <- %s (%s), Reason: %d\n",
361 module32, TD, module16, thunkfun16, dwReason);
362 }
363 else if (!strncmp(TD->magic, "LS01", 4))
364 {
365 directionSL = FALSE;
366
367 TRACE("LS01 thunk %s (%p) -> %s (%s), Reason: %d\n",
368 module32, TD, module16, thunkfun16, dwReason);
369 }
370 else
371 {
372 ERR("Invalid magic %c%c%c%c\n",
373 TD->magic[0], TD->magic[1], TD->magic[2], TD->magic[3]);
374 return 0;
375 }
376
377 switch (dwReason)
378 {
379 case DLL_PROCESS_ATTACH:
380 {
381 struct ThunkDataCommon *TD16;
382 if (!(TD16 = _loadthunk(module16, thunkfun16, module32, TD, 0L)))
383 return 0;
384
385 if (directionSL)
386 {
387 struct ThunkDataSL32 *SL32 = (struct ThunkDataSL32 *)TD;
388 struct ThunkDataSL16 *SL16 = (struct ThunkDataSL16 *)TD16;
389 struct SLTargetDB *tdb;
390
391 if (SL16->fpData == NULL)
392 {
393 ERR("ThunkConnect16 was not called!\n");
394 return 0;
395 }
396
397 SL32->data = SL16->fpData;
398
399 tdb = HeapAlloc(GetProcessHeap(), 0, sizeof(*tdb));
400 tdb->process = GetCurrentProcessId();
401 tdb->targetTable = (DWORD *)(thunkfun16 + SL32->offsetTargetTable);
402
403 tdb->next = SL32->data->targetDB; /* FIXME: not thread-safe! */
404 SL32->data->targetDB = tdb;
405
406 TRACE("Process %08x allocated TargetDB entry for ThunkDataSL %p\n",
407 GetCurrentProcessId(), SL32->data);
408 }
409 else
410 {
411 struct ThunkDataLS32 *LS32 = (struct ThunkDataLS32 *)TD;
412 struct ThunkDataLS16 *LS16 = (struct ThunkDataLS16 *)TD16;
413
414 LS32->targetTable = MapSL(LS16->targetTable);
415
416 /* write QT_Thunk and FT_Prolog stubs */
417 _write_qtthunk ((LPBYTE)TD + LS32->offsetQTThunk, LS32->targetTable);
418 _write_ftprolog((LPBYTE)TD + LS32->offsetFTProlog, LS32->targetTable);
419 }
420 break;
421 }
422
423 case DLL_PROCESS_DETACH:
424 /* FIXME: cleanup */
425 break;
426 }
427
428 return 1;
429 }
430
431 /**********************************************************************
432 * QT_Thunk (KERNEL32.@)
433 *
434 * The target address is in EDX.
435 * The 16bit arguments start at ESP.
436 * The number of 16bit argument bytes is EBP-ESP-0x40 (64 Byte thunksetup).
437 * So the stack layout is 16bit argument bytes and then the 64 byte
438 * scratch buffer.
439 * The scratch buffer is used as work space by Windows' QT_Thunk
440 * function.
441 * As the programs unfortunately don't always provide a fixed size
442 * scratch buffer (danger, stack corruption ahead !!), we simply resort
443 * to copying over the whole EBP-ESP range to the 16bit stack
444 * (as there's no way to safely figure out the param count
445 * due to this misbehaviour of some programs).
446 * [ok]
447 *
448 * See DDJ article 9614c for a very good description of QT_Thunk (also
449 * available online !).
450 *
451 * FIXME: DDJ talks of certain register usage rules; I'm not sure
452 * whether we cover this 100%.
453 */
454 void WINAPI __regs_QT_Thunk( CONTEXT *context )
455 {
456 CONTEXT context16;
457 DWORD argsize;
458
459 context16 = *context;
460
461 context16.SegFs = wine_get_fs();
462 context16.SegGs = wine_get_gs();
463 context16.SegCs = HIWORD(context->Edx);
464 context16.Eip = LOWORD(context->Edx);
465 /* point EBP to the STACK16FRAME on the stack
466 * for the call_to_16 to set up the register content on calling */
467 context16.Ebp = OFFSETOF(NtCurrentTeb()->WOW32Reserved) + FIELD_OFFSET(STACK16FRAME,bp);
468
469 /*
470 * used to be (problematic):
471 * argsize = context->Ebp - context->Esp - 0x40;
472 * due to some programs abusing the API, we better assume the full
473 * EBP - ESP range for copying instead: */
474 argsize = context->Ebp - context->Esp;
475
476 /* ok, too much is insane; let's limit param count a bit again */
477 if (argsize > 64)
478 argsize = 64; /* 32 WORDs */
479
480 WOWCallback16Ex( 0, WCB16_REGS, argsize, (void *)context->Esp, (DWORD *)&context16 );
481 context->Eax = context16.Eax;
482 context->Edx = context16.Edx;
483 context->Ecx = context16.Ecx;
484
485 /* make sure to update the Win32 ESP, too, in order to throw away
486 * the number of parameters that the Win16 function
487 * accepted (that it popped from the corresponding Win16 stack) */
488 context->Esp += LOWORD(context16.Esp) -
489 ( OFFSETOF(NtCurrentTeb()->WOW32Reserved) - argsize );
490 }
491 DEFINE_REGS_ENTRYPOINT( QT_Thunk, 0 )
492
493
494 /**********************************************************************
495 * FT_Prolog (KERNEL32.@)
496 *
497 * The set of FT_... thunk routines is used instead of QT_Thunk,
498 * if structures have to be converted from 32-bit to 16-bit
499 * (change of member alignment, conversion of members).
500 *
501 * The thunk function (as created by the thunk compiler) calls
502 * FT_Prolog at the beginning, to set up a stack frame and
503 * allocate a 64 byte buffer on the stack.
504 * The input parameters (target address and some flags) are
505 * saved for later use by FT_Thunk.
506 *
507 * Input: EDX 16-bit target address (SEGPTR)
508 * CX bits 0..7 target number (in target table)
509 * bits 8..9 some flags (unclear???)
510 * bits 10..15 number of DWORD arguments
511 *
512 * Output: A new stackframe is created, and a 64 byte buffer
513 * allocated on the stack. The layout of the stack
514 * on return is as follows:
515 *
516 * (ebp+4) return address to caller of thunk function
517 * (ebp) old EBP
518 * (ebp-4) saved EBX register of caller
519 * (ebp-8) saved ESI register of caller
520 * (ebp-12) saved EDI register of caller
521 * (ebp-16) saved ECX register, containing flags
522 * (ebp-20) bitmap containing parameters that are to be converted
523 * by FT_Thunk; it is initialized to 0 by FT_Prolog and
524 * filled in by the thunk code before calling FT_Thunk
525 * (ebp-24)
526 * ... (unclear)
527 * (ebp-44)
528 * (ebp-48) saved EAX register of caller (unclear, never restored???)
529 * (ebp-52) saved EDX register, containing 16-bit thunk target
530 * (ebp-56)
531 * ... (unclear)
532 * (ebp-64)
533 *
534 * ESP is EBP-64 after return.
535 *
536 */
537 void WINAPI __regs_FT_Prolog( CONTEXT *context )
538 {
539 /* Build stack frame */
540 stack32_push(context, context->Ebp);
541 context->Ebp = context->Esp;
542
543 /* Allocate 64-byte Thunk Buffer */
544 context->Esp -= 64;
545 memset((char *)context->Esp, '\0', 64);
546
547 /* Store Flags (ECX) and Target Address (EDX) */
548 /* Save other registers to be restored later */
549 *(DWORD *)(context->Ebp - 4) = context->Ebx;
550 *(DWORD *)(context->Ebp - 8) = context->Esi;
551 *(DWORD *)(context->Ebp - 12) = context->Edi;
552 *(DWORD *)(context->Ebp - 16) = context->Ecx;
553
554 *(DWORD *)(context->Ebp - 48) = context->Eax;
555 *(DWORD *)(context->Ebp - 52) = context->Edx;
556 }
557 DEFINE_REGS_ENTRYPOINT( FT_Prolog, 0 )
558
559 /**********************************************************************
560 * FT_Thunk (KERNEL32.@)
561 *
562 * This routine performs the actual call to 16-bit code,
563 * similar to QT_Thunk. The differences are:
564 * - The call target is taken from the buffer created by FT_Prolog
565 * - Those arguments requested by the thunk code (by setting the
566 * corresponding bit in the bitmap at EBP-20) are converted
567 * from 32-bit pointers to segmented pointers (those pointers
568 * are guaranteed to point to structures copied to the stack
569 * by the thunk code, so we always use the 16-bit stack selector
570 * for those addresses).
571 *
572 * The bit #i of EBP-20 corresponds here to the DWORD starting at
573 * ESP+4 + 2*i.
574 *
575 * FIXME: It is unclear what happens if there are more than 32 WORDs
576 * of arguments, so that the single DWORD bitmap is no longer
577 * sufficient ...
578 */
579 void WINAPI __regs_FT_Thunk( CONTEXT *context )
580 {
581 DWORD mapESPrelative = *(DWORD *)(context->Ebp - 20);
582 DWORD callTarget = *(DWORD *)(context->Ebp - 52);
583
584 CONTEXT context16;
585 DWORD i, argsize;
586 DWORD newstack[32];
587 LPBYTE oldstack;
588
589 context16 = *context;
590
591 context16.SegFs = wine_get_fs();
592 context16.SegGs = wine_get_gs();
593 context16.SegCs = HIWORD(callTarget);
594 context16.Eip = LOWORD(callTarget);
595 context16.Ebp = OFFSETOF(NtCurrentTeb()->WOW32Reserved) + FIELD_OFFSET(STACK16FRAME,bp);
596
597 argsize = context->Ebp-context->Esp-0x40;
598 if (argsize > sizeof(newstack)) argsize = sizeof(newstack);
599 oldstack = (LPBYTE)context->Esp;
600
601 memcpy( newstack, oldstack, argsize );
602
603 for (i = 0; i < 32; i++) /* NOTE: What about > 32 arguments? */
604 if (mapESPrelative & (1 << i))
605 {
606 SEGPTR *arg = (SEGPTR *)newstack[i];
607 *arg = MAKESEGPTR(SELECTOROF(NtCurrentTeb()->WOW32Reserved),
608 OFFSETOF(NtCurrentTeb()->WOW32Reserved) - argsize
609 + (*(LPBYTE *)arg - oldstack));
610 }
611
612 WOWCallback16Ex( 0, WCB16_REGS, argsize, newstack, (DWORD *)&context16 );
613 context->Eax = context16.Eax;
614 context->Edx = context16.Edx;
615 context->Ecx = context16.Ecx;
616
617 context->Esp += LOWORD(context16.Esp) -
618 ( OFFSETOF(NtCurrentTeb()->WOW32Reserved) - argsize );
619
620 /* Copy modified buffers back to 32-bit stack */
621 memcpy( oldstack, newstack, argsize );
622 }
623 DEFINE_REGS_ENTRYPOINT( FT_Thunk, 0 )
624
625 /***********************************************************************
626 * FT_Exit0 (KERNEL32.@)
627 * FT_Exit4 (KERNEL32.@)
628 * FT_Exit8 (KERNEL32.@)
629 * FT_Exit12 (KERNEL32.@)
630 * FT_Exit16 (KERNEL32.@)
631 * FT_Exit20 (KERNEL32.@)
632 * FT_Exit24 (KERNEL32.@)
633 * FT_Exit28 (KERNEL32.@)
634 * FT_Exit32 (KERNEL32.@)
635 * FT_Exit36 (KERNEL32.@)
636 * FT_Exit40 (KERNEL32.@)
637 * FT_Exit44 (KERNEL32.@)
638 * FT_Exit48 (KERNEL32.@)
639 * FT_Exit52 (KERNEL32.@)
640 * FT_Exit56 (KERNEL32.@)
641 *
642 * One of the FT_ExitNN functions is called at the end of the thunk code.
643 * It removes the stack frame created by FT_Prolog, moves the function
644 * return from EBX to EAX (yes, FT_Thunk did use EAX for the return
645 * value, but the thunk code has moved it from EAX to EBX in the
646 * meantime ... :-), restores the caller's EBX, ESI, and EDI registers,
647 * and perform a return to the CALLER of the thunk code (while removing
648 * the given number of arguments from the caller's stack).
649 */
650 #define FT_EXIT_RESTORE_REGS \
651 "movl %ebx,%eax\n\t" \
652 "movl -4(%ebp),%ebx\n\t" \
653 "movl -8(%ebp),%esi\n\t" \
654 "movl -12(%ebp),%edi\n\t" \
655 "leave\n\t"
656
657 #define DEFINE_FT_Exit(n) \
658 __ASM_STDCALL_FUNC( FT_Exit ## n, 0, FT_EXIT_RESTORE_REGS "ret $" #n )
659
660 DEFINE_FT_Exit(0)
661 DEFINE_FT_Exit(4)
662 DEFINE_FT_Exit(8)
663 DEFINE_FT_Exit(12)
664 DEFINE_FT_Exit(16)
665 DEFINE_FT_Exit(20)
666 DEFINE_FT_Exit(24)
667 DEFINE_FT_Exit(28)
668 DEFINE_FT_Exit(32)
669 DEFINE_FT_Exit(36)
670 DEFINE_FT_Exit(40)
671 DEFINE_FT_Exit(44)
672 DEFINE_FT_Exit(48)
673 DEFINE_FT_Exit(52)
674 DEFINE_FT_Exit(56)
675
676
677 /***********************************************************************
678 * ThunkInitLS (KERNEL32.43)
679 * A thunkbuffer link routine
680 * The thunkbuf looks like:
681 *
682 * 00: DWORD length ? don't know exactly
683 * 04: SEGPTR ptr ? where does it point to?
684 * The pointer ptr is written into the first DWORD of 'thunk'.
685 * (probably correctly implemented)
686 * [ok probably]
687 * RETURNS
688 * segmented pointer to thunk?
689 */
690 DWORD WINAPI ThunkInitLS(
691 LPDWORD thunk, /* [in] win32 thunk */
692 LPCSTR thkbuf, /* [in] thkbuffer name in win16 dll */
693 DWORD len, /* [in] thkbuffer length */
694 LPCSTR dll16, /* [in] name of win16 dll */
695 LPCSTR dll32 /* [in] name of win32 dll (FIXME: not used?) */
696 ) {
697 LPDWORD addr;
698
699 if (!(addr = _loadthunk( dll16, thkbuf, dll32, NULL, len )))
700 return 0;
701
702 if (!addr[1])
703 return 0;
704 *thunk = addr[1];
705
706 return addr[1];
707 }
708
709 /***********************************************************************
710 * Common32ThkLS (KERNEL32.45)
711 *
712 * This is another 32->16 thunk, independent of the QT_Thunk/FT_Thunk
713 * style thunks. The basic difference is that the parameter conversion
714 * is done completely on the *16-bit* side here. Thus we do not call
715 * the 16-bit target directly, but call a common entry point instead.
716 * This entry function then calls the target according to the target
717 * number passed in the DI register.
718 *
719 * Input: EAX SEGPTR to the common 16-bit entry point
720 * CX offset in thunk table (target number * 4)
721 * DX error return value if execution fails (unclear???)
722 * EDX.HI number of DWORD parameters
723 *
724 * (Note that we need to move the thunk table offset from CX to DI !)
725 *
726 * The called 16-bit stub expects its stack to look like this:
727 * ...
728 * (esp+40) 32-bit arguments
729 * ...
730 * (esp+8) 32 byte of stack space available as buffer
731 * (esp) 8 byte return address for use with 0x66 lret
732 *
733 * The called 16-bit stub uses a 0x66 lret to return to 32-bit code,
734 * and uses the EAX register to return a DWORD return value.
735 * Thus we need to use a special assembly glue routine
736 * (CallRegisterLongProc instead of CallRegisterShortProc).
737 *
738 * Finally, we return to the caller, popping the arguments off
739 * the stack. The number of arguments to be popped is returned
740 * in the BL register by the called 16-bit routine.
741 *
742 */
743 void WINAPI __regs_Common32ThkLS( CONTEXT *context )
744 {
745 CONTEXT context16;
746 DWORD argsize;
747
748 context16 = *context;
749
750 context16.SegFs = wine_get_fs();
751 context16.SegGs = wine_get_gs();
752 context16.Edi = LOWORD(context->Ecx);
753 context16.SegCs = HIWORD(context->Eax);
754 context16.Eip = LOWORD(context->Eax);
755 context16.Ebp = OFFSETOF(NtCurrentTeb()->WOW32Reserved) + FIELD_OFFSET(STACK16FRAME,bp);
756
757 argsize = HIWORD(context->Edx) * 4;
758
759 /* FIXME: hack for stupid USER32 CallbackGlueLS routine */
760 if (context->Edx == context->Eip)
761 argsize = 6 * 4;
762
763 /* Note: the first 32 bytes we copy are just garbage from the 32-bit stack, in order to reserve
764 * the space. It is safe to do that since the register function prefix has reserved
765 * a lot more space than that below context->Esp.
766 */
767 WOWCallback16Ex( 0, WCB16_REGS, argsize + 32, (LPBYTE)context->Esp - 32, (DWORD *)&context16 );
768 context->Eax = context16.Eax;
769
770 /* Clean up caller's stack frame */
771 context->Esp += LOBYTE(context16.Ebx);
772 }
773 DEFINE_REGS_ENTRYPOINT( Common32ThkLS, 0 )
774
775 /***********************************************************************
776 * OT_32ThkLSF (KERNEL32.40)
777 *
778 * YET Another 32->16 thunk. The difference to Common32ThkLS is that
779 * argument processing is done on both the 32-bit and the 16-bit side:
780 * The 32-bit side prepares arguments, copying them onto the stack.
781 *
782 * When this routine is called, the first word on the stack is the
783 * number of argument bytes prepared by the 32-bit code, and EDX
784 * contains the 16-bit target address.
785 *
786 * The called 16-bit routine is another relaycode, doing further
787 * argument processing and then calling the real 16-bit target
788 * whose address is stored at [bp-04].
789 *
790 * The call proceeds using a normal CallRegisterShortProc.
791 * After return from the 16-bit relaycode, the arguments need
792 * to be copied *back* to the 32-bit stack, since the 32-bit
793 * relaycode processes output parameters.
794 *
795 * Note that we copy twice the number of arguments, since some of the
796 * 16-bit relaycodes in SYSTHUNK.DLL directly access the original
797 * arguments of the caller!
798 *
799 * (Note that this function seems only to be used for
800 * OLECLI32 -> OLECLI and OLESVR32 -> OLESVR thunking.)
801 */
802 void WINAPI __regs_OT_32ThkLSF( CONTEXT *context )
803 {
804 CONTEXT context16;
805 DWORD argsize;
806
807 context16 = *context;
808
809 context16.SegFs = wine_get_fs();
810 context16.SegGs = wine_get_gs();
811 context16.SegCs = HIWORD(context->Edx);
812 context16.Eip = LOWORD(context->Edx);
813 context16.Ebp = OFFSETOF(NtCurrentTeb()->WOW32Reserved) + FIELD_OFFSET(STACK16FRAME,bp);
814
815 argsize = 2 * *(WORD *)context->Esp + 2;
816
817 WOWCallback16Ex( 0, WCB16_REGS, argsize, (void *)context->Esp, (DWORD *)&context16 );
818 context->Eax = context16.Eax;
819 context->Edx = context16.Edx;
820
821 /* Copy modified buffers back to 32-bit stack */
822 memcpy( (LPBYTE)context->Esp,
823 (LPBYTE)CURRENT_STACK16 - argsize, argsize );
824
825 context->Esp += LOWORD(context16.Esp) -
826 ( OFFSETOF(NtCurrentTeb()->WOW32Reserved) - argsize );
827 }
828 DEFINE_REGS_ENTRYPOINT( OT_32ThkLSF, 0 )
829
830 /***********************************************************************
831 * ThunkInitLSF (KERNEL32.41)
832 * A thunk setup routine.
833 * Expects a pointer to a preinitialized thunkbuffer in the first argument
834 * looking like:
835 *| 00..03: unknown (pointer, check _41, _43, _46)
836 *| 04: EB1E jmp +0x20
837 *|
838 *| 06..23: unknown (space for replacement code, check .90)
839 *|
840 *| 24:>E800000000 call offset 29
841 *| 29:>58 pop eax ( target of call )
842 *| 2A: 2D25000000 sub eax,0x00000025 ( now points to offset 4 )
843 *| 2F: BAxxxxxxxx mov edx,xxxxxxxx
844 *| 34: 68yyyyyyyy push KERNEL32.90
845 *| 39: C3 ret
846 *|
847 *| 3A: EB1E jmp +0x20
848 *| 3E ... 59: unknown (space for replacement code?)
849 *| 5A: E8xxxxxxxx call <32bitoffset xxxxxxxx>
850 *| 5F: 5A pop edx
851 *| 60: 81EA25xxxxxx sub edx, 0x25xxxxxx
852 *| 66: 52 push edx
853 *| 67: 68xxxxxxxx push xxxxxxxx
854 *| 6C: 68yyyyyyyy push KERNEL32.89
855 *| 71: C3 ret
856 *| 72: end?
857 * This function checks if the code is there, and replaces the yyyyyyyy entries
858 * by the functionpointers.
859 * The thunkbuf looks like:
860 *
861 *| 00: DWORD length ? don't know exactly
862 *| 04: SEGPTR ptr ? where does it point to?
863 * The segpointer ptr is written into the first DWORD of 'thunk'.
864 * [ok probably]
865 * RETURNS
866 * unclear, pointer to win16 thkbuffer?
867 */
868 LPVOID WINAPI ThunkInitLSF(
869 LPBYTE thunk, /* [in] win32 thunk */
870 LPCSTR thkbuf, /* [in] thkbuffer name in win16 dll */
871 DWORD len, /* [in] length of thkbuffer */
872 LPCSTR dll16, /* [in] name of win16 dll */
873 LPCSTR dll32 /* [in] name of win32 dll */
874 ) {
875 LPDWORD addr,addr2;
876
877 /* FIXME: add checks for valid code ... */
878 /* write pointers to kernel32.89 and kernel32.90 (+ordinal base of 1) */
879 *(void **)(thunk+0x35) = QT_ThunkPrime;
880 *(void **)(thunk+0x6D) = FT_PrologPrime;
881
882 if (!(addr = _loadthunk( dll16, thkbuf, dll32, NULL, len )))
883 return 0;
884
885 addr2 = MapSL(addr[1]);
886 if (HIWORD(addr2))
887 *(DWORD*)thunk = (DWORD)addr2;
888
889 return addr2;
890 }
891
892 /***********************************************************************
893 * FT_PrologPrime (KERNEL32.89)
894 *
895 * This function is called from the relay code installed by
896 * ThunkInitLSF. It replaces the location from where it was
897 * called by a standard FT_Prolog call stub (which is 'primed'
898 * by inserting the correct target table pointer).
899 * Finally, it calls that stub.
900 *
901 * Input: ECX target number + flags (passed through to FT_Prolog)
902 * (ESP) offset of location where target table pointer
903 * is stored, relative to the start of the relay code
904 * (ESP+4) pointer to start of relay code
905 * (this is where the FT_Prolog call stub gets written to)
906 *
907 * Note: The two DWORD arguments get popped off the stack.
908 *
909 */
910 void WINAPI __regs_FT_PrologPrime( CONTEXT *context )
911 {
912 DWORD targetTableOffset;
913 LPBYTE relayCode;
914
915 /* Compensate for the fact that the Wine register relay code thought
916 we were being called, although we were in fact jumped to */
917 context->Esp -= 4;
918
919 /* Write FT_Prolog call stub */
920 targetTableOffset = stack32_pop(context);
921 relayCode = (LPBYTE)stack32_pop(context);
922 _write_ftprolog( relayCode, *(DWORD **)(relayCode+targetTableOffset) );
923
924 /* Jump to the call stub just created */
925 context->Eip = (DWORD)relayCode;
926 }
927 DEFINE_REGS_ENTRYPOINT( FT_PrologPrime, 0 )
928
929 /***********************************************************************
930 * QT_ThunkPrime (KERNEL32.90)
931 *
932 * This function corresponds to FT_PrologPrime, but installs a
933 * call stub for QT_Thunk instead.
934 *
935 * Input: (EBP-4) target number (passed through to QT_Thunk)
936 * EDX target table pointer location offset
937 * EAX start of relay code
938 *
939 */
940 void WINAPI __regs_QT_ThunkPrime( CONTEXT *context )
941 {
942 DWORD targetTableOffset;
943 LPBYTE relayCode;
944
945 /* Compensate for the fact that the Wine register relay code thought
946 we were being called, although we were in fact jumped to */
947 context->Esp -= 4;
948
949 /* Write QT_Thunk call stub */
950 targetTableOffset = context->Edx;
951 relayCode = (LPBYTE)context->Eax;
952 _write_qtthunk( relayCode, *(DWORD **)(relayCode+targetTableOffset) );
953
954 /* Jump to the call stub just created */
955 context->Eip = (DWORD)relayCode;
956 }
957 DEFINE_REGS_ENTRYPOINT( QT_ThunkPrime, 0 )
958
959 /***********************************************************************
960 * ThunkInitSL (KERNEL32.46)
961 * Another thunkbuf link routine.
962 * The start of the thunkbuf looks like this:
963 * 00: DWORD length
964 * 04: SEGPTR address for thunkbuffer pointer
965 * [ok probably]
966 *
967 * RETURNS
968 * Nothing.
969 */
970 VOID WINAPI ThunkInitSL(
971 LPBYTE thunk, /* [in] start of thunkbuffer */
972 LPCSTR thkbuf, /* [in] name/ordinal of thunkbuffer in win16 dll */
973 DWORD len, /* [in] length of thunkbuffer */
974 LPCSTR dll16, /* [in] name of win16 dll containing the thkbuf */
975 LPCSTR dll32 /* [in] win32 dll. FIXME: strange, unused */
976 ) {
977 LPDWORD addr;
978
979 if (!(addr = _loadthunk( dll16, thkbuf, dll32, NULL, len )))
980 return;
981
982 *(DWORD*)MapSL(addr[1]) = (DWORD)thunk;
983 }
984
985 /**********************************************************************
986 * SSInit (KERNEL.700)
987 * RETURNS
988 * TRUE for success.
989 */
990 BOOL WINAPI SSInit16(void)
991 {
992 return TRUE;
993 }
994
995 /**********************************************************************
996 * SSOnBigStack (KERNEL32.87)
997 * Check if thunking is initialized (ss selector set up etc.)
998 * We do that differently, so just return TRUE.
999 * [ok]
1000 * RETURNS
1001 * TRUE for success.
1002 */
1003 BOOL WINAPI SSOnBigStack(void)
1004 {
1005 TRACE("Yes, thunking is initialized\n");
1006 return TRUE;
1007 }
1008
1009 /**********************************************************************
1010 * SSConfirmSmallStack (KERNEL.704)
1011 *
1012 * Abort if not on small stack.
1013 *
1014 * This must be a register routine as it has to preserve *all* registers.
1015 */
1016 void WINAPI SSConfirmSmallStack( CONTEXT *context )
1017 {
1018 /* We are always on the small stack while in 16-bit code ... */
1019 }
1020
1021 /**********************************************************************
1022 * SSCall (KERNEL32.88)
1023 * One of the real thunking functions. This one seems to be for 32<->32
1024 * thunks. It should probably be capable of crossing processboundaries.
1025 *
1026 * And YES, I've seen nr=48 (somewhere in the Win95 32<->16 OLE coupling)
1027 * [ok]
1028 *
1029 * RETURNS
1030 * Thunked function result.
1031 */
1032 DWORD WINAPIV SSCall(
1033 DWORD nr, /* [in] number of argument bytes */
1034 DWORD flags, /* [in] FIXME: flags ? */
1035 FARPROC fun, /* [in] function to call */
1036 ... /* [in/out] arguments */
1037 ) {
1038 DWORD i,ret;
1039 DWORD *args = ((DWORD *)&fun) + 1;
1040
1041 if(TRACE_ON(thunk))
1042 {
1043 DPRINTF("(%d,0x%08x,%p,[",nr,flags,fun);
1044 for (i=0;i<nr/4;i++)
1045 DPRINTF("0x%08x,",args[i]);
1046 DPRINTF("])\n");
1047 }
1048 ret = call_entry_point( fun, nr / sizeof(DWORD), args );
1049 TRACE(" returning %d ...\n",ret);
1050 return ret;
1051 }
1052
1053 /**********************************************************************
1054 * W32S_BackTo32 (KERNEL32.51)
1055 */
1056 void WINAPI __regs_W32S_BackTo32( CONTEXT *context )
1057 {
1058 LPDWORD stack = (LPDWORD)context->Esp;
1059 FARPROC proc = (FARPROC)context->Eip;
1060
1061 context->Eax = call_entry_point( proc, 10, stack + 1 );
1062 context->Eip = stack32_pop(context);
1063 }
1064 DEFINE_REGS_ENTRYPOINT( W32S_BackTo32, 0 )
1065
1066 /**********************************************************************
1067 * AllocSLCallback (KERNEL32.@)
1068 *
1069 * Allocate a 16->32 callback.
1070 *
1071 * NOTES
1072 * Win95 uses some structchains for callbacks. It allocates them
1073 * in blocks of 100 entries, size 32 bytes each, layout:
1074 * blockstart:
1075 *| 0: PTR nextblockstart
1076 *| 4: entry *first;
1077 *| 8: WORD sel ( start points to blockstart)
1078 *| A: WORD unknown
1079 * 100xentry:
1080 *| 00..17: Code
1081 *| 18: PDB *owning_process;
1082 *| 1C: PTR blockstart
1083 *
1084 * We ignore this for now. (Just a note for further developers)
1085 * FIXME: use this method, so we don't waste selectors...
1086 *
1087 * Following code is then generated by AllocSLCallback. The code is 16 bit, so
1088 * the 0x66 prefix switches from word->long registers.
1089 *
1090 *| 665A pop edx
1091 *| 6668x arg2 x pushl <arg2>
1092 *| 6652 push edx
1093 *| EAx arg1 x jmpf <arg1>
1094 *
1095 * returns the startaddress of this thunk.
1096 *
1097 * Note, that they look very similar to the ones allocates by THUNK_Alloc.
1098 * RETURNS
1099 * A segmented pointer to the start of the thunk
1100 */
1101 DWORD WINAPI
1102 AllocSLCallback(
1103 DWORD finalizer, /* [in] Finalizer function */
1104 DWORD callback /* [in] Callback function */
1105 ) {
1106 LPBYTE x,thunk = HeapAlloc( GetProcessHeap(), 0, 32 );
1107 WORD sel;
1108
1109 x=thunk;
1110 *x++=0x66;*x++=0x5a; /* popl edx */
1111 *x++=0x66;*x++=0x68;*(DWORD*)x=finalizer;x+=4; /* pushl finalizer */
1112 *x++=0x66;*x++=0x52; /* pushl edx */
1113 *x++=0xea;*(DWORD*)x=callback;x+=4; /* jmpf callback */
1114
1115 *(DWORD*)(thunk+18) = GetCurrentProcessId();
1116
1117 sel = SELECTOR_AllocBlock( thunk, 32, WINE_LDT_FLAGS_CODE );
1118 return (sel<<16)|0;
1119 }
1120
1121 /**********************************************************************
1122 * FreeSLCallback (KERNEL32.@)
1123 * Frees the specified 16->32 callback
1124 *
1125 * RETURNS
1126 * Nothing.
1127 */
1128 void WINAPI
1129 FreeSLCallback(
1130 DWORD x /* [in] 16 bit callback (segmented pointer?) */
1131 ) {
1132 FIXME("(0x%08x): stub\n",x);
1133 }
1134
1135 /**********************************************************************
1136 * AllocMappedBuffer (KERNEL32.38)
1137 *
1138 * This is an undocumented KERNEL32 function that
1139 * SMapLS's a GlobalAlloc'ed buffer.
1140 *
1141 * RETURNS
1142 * EDI register: pointer to buffer
1143 *
1144 * NOTES
1145 * The buffer is preceded by 8 bytes:
1146 * ...
1147 * edi+0 buffer
1148 * edi-4 SEGPTR to buffer
1149 * edi-8 some magic Win95 needs for SUnMapLS
1150 * (we use it for the memory handle)
1151 *
1152 * The SEGPTR is used by the caller!
1153 */
1154 void WINAPI __regs_AllocMappedBuffer(
1155 CONTEXT *context /* [in] EDI register: size of buffer to allocate */
1156 ) {
1157 HGLOBAL handle = GlobalAlloc(0, context->Edi + 8);
1158 DWORD *buffer = GlobalLock(handle);
1159 DWORD ptr = 0;
1160
1161 if (buffer)
1162 if (!(ptr = MapLS(buffer + 2)))
1163 {
1164 GlobalUnlock(handle);
1165 GlobalFree(handle);
1166 }
1167
1168 if (!ptr)
1169 context->Eax = context->Edi = 0;
1170 else
1171 {
1172 buffer[0] = (DWORD)handle;
1173 buffer[1] = ptr;
1174
1175 context->Eax = ptr;
1176 context->Edi = (DWORD)(buffer + 2);
1177 }
1178 }
1179 DEFINE_REGS_ENTRYPOINT( AllocMappedBuffer, 0 )
1180
1181 /**********************************************************************
1182 * FreeMappedBuffer (KERNEL32.39)
1183 *
1184 * Free a buffer allocated by AllocMappedBuffer
1185 *
1186 * RETURNS
1187 * Nothing.
1188 */
1189 void WINAPI __regs_FreeMappedBuffer(
1190 CONTEXT *context /* [in] EDI register: pointer to buffer */
1191 ) {
1192 if (context->Edi)
1193 {
1194 DWORD *buffer = (DWORD *)context->Edi - 2;
1195
1196 UnMapLS(buffer[1]);
1197
1198 GlobalUnlock((HGLOBAL)buffer[0]);
1199 GlobalFree((HGLOBAL)buffer[0]);
1200 }
1201 }
1202 DEFINE_REGS_ENTRYPOINT( FreeMappedBuffer, 0 )
1203
1204 /**********************************************************************
1205 * GetTEBSelectorFS (KERNEL.475)
1206 * Set the 16-bit %fs to the 32-bit %fs (current TEB selector)
1207 */
1208 void WINAPI GetTEBSelectorFS16(void)
1209 {
1210 CURRENT_STACK16->fs = wine_get_fs();
1211 }
1212
1213 /**********************************************************************
1214 * IsPeFormat (KERNEL.431)
1215 *
1216 * Determine if a file is a PE format executable.
1217 *
1218 * RETURNS
1219 * TRUE, if it is.
1220 * FALSE if the file could not be opened or is not a PE file.
1221 *
1222 * NOTES
1223 * If fn is given as NULL then the function expects hf16 to be valid.
1224 */
1225 BOOL16 WINAPI IsPeFormat16(
1226 LPSTR fn, /* [in] Filename to the executable */
1227 HFILE16 hf16) /* [in] An open file handle */
1228 {
1229 BOOL ret = FALSE;
1230 IMAGE_DOS_HEADER mzh;
1231 OFSTRUCT ofs;
1232 DWORD xmagic;
1233
1234 if (fn) hf16 = OpenFile16(fn,&ofs,OF_READ);
1235 if (hf16 == HFILE_ERROR16) return FALSE;
1236 _llseek16(hf16,0,SEEK_SET);
1237 if (sizeof(mzh)!=_lread16(hf16,&mzh,sizeof(mzh))) goto done;
1238 if (mzh.e_magic!=IMAGE_DOS_SIGNATURE) goto done;
1239 _llseek16(hf16,mzh.e_lfanew,SEEK_SET);
1240 if (sizeof(DWORD)!=_lread16(hf16,&xmagic,sizeof(DWORD))) goto done;
1241 ret = (xmagic == IMAGE_NT_SIGNATURE);
1242 done:
1243 _lclose16(hf16);
1244 return ret;
1245 }
1246
1247
1248 /***********************************************************************
1249 * K32Thk1632Prolog (KERNEL32.@)
1250 */
1251 void WINAPI __regs_K32Thk1632Prolog( CONTEXT *context )
1252 {
1253 LPBYTE code = (LPBYTE)context->Eip - 5;
1254
1255 /* Arrrgh! SYSTHUNK.DLL just has to re-implement another method
1256 of 16->32 thunks instead of using one of the standard methods!
1257 This means that SYSTHUNK.DLL itself switches to a 32-bit stack,
1258 and does a far call to the 32-bit code segment of OLECLI32/OLESVR32.
1259 Unfortunately, our CallTo/CallFrom mechanism is therefore completely
1260 bypassed, which means it will crash the next time the 32-bit OLE
1261 code thunks down again to 16-bit (this *will* happen!).
1262
1263 The following hack tries to recognize this situation.
1264 This is possible since the called stubs in OLECLI32/OLESVR32 all
1265 look exactly the same:
1266 00 E8xxxxxxxx call K32Thk1632Prolog
1267 05 FF55FC call [ebp-04]
1268 08 E8xxxxxxxx call K32Thk1632Epilog
1269 0D 66CB retf
1270
1271 If we recognize this situation, we try to simulate the actions
1272 of our CallTo/CallFrom mechanism by copying the 16-bit stack
1273 to our 32-bit stack, creating a proper STACK16FRAME and
1274 updating cur_stack. */
1275
1276 if ( code[5] == 0xFF && code[6] == 0x55 && code[7] == 0xFC
1277 && code[13] == 0x66 && code[14] == 0xCB)
1278 {
1279 DWORD argSize = context->Ebp - context->Esp;
1280 char *stack16 = (char *)context->Esp - 4;
1281 STACK16FRAME *frame16 = (STACK16FRAME *)stack16 - 1;
1282 STACK32FRAME *frame32 = NtCurrentTeb()->WOW32Reserved;
1283 char *stack32 = (char *)frame32 - argSize;
1284 WORD stackSel = SELECTOROF(frame32->frame16);
1285 DWORD stackBase = GetSelectorBase(stackSel);
1286
1287 TRACE("before SYSTHUNK hack: EBP: %08x ESP: %08x cur_stack: %p\n",
1288 context->Ebp, context->Esp, NtCurrentTeb()->WOW32Reserved);
1289
1290 memset(frame16, '\0', sizeof(STACK16FRAME));
1291 frame16->frame32 = frame32;
1292 frame16->ebp = context->Ebp;
1293
1294 memcpy(stack32, stack16, argSize);
1295 NtCurrentTeb()->WOW32Reserved = (void *)MAKESEGPTR(stackSel, (DWORD)frame16 - stackBase);
1296
1297 context->Esp = (DWORD)stack32 + 4;
1298 context->Ebp = context->Esp + argSize;
1299
1300 TRACE("after SYSTHUNK hack: EBP: %08x ESP: %08x cur_stack: %p\n",
1301 context->Ebp, context->Esp, NtCurrentTeb()->WOW32Reserved);
1302 }
1303
1304 /* entry_point is never used again once the entry point has
1305 been called. Thus we re-use it to hold the Win16Lock count */
1306 ReleaseThunkLock(&CURRENT_STACK16->entry_point);
1307 }
1308 DEFINE_REGS_ENTRYPOINT( K32Thk1632Prolog, 0 )
1309
1310 /***********************************************************************
1311 * K32Thk1632Epilog (KERNEL32.@)
1312 */
1313 void WINAPI __regs_K32Thk1632Epilog( CONTEXT *context )
1314 {
1315 LPBYTE code = (LPBYTE)context->Eip - 13;
1316
1317 RestoreThunkLock(CURRENT_STACK16->entry_point);
1318
1319 /* We undo the SYSTHUNK hack if necessary. See K32Thk1632Prolog. */
1320
1321 if ( code[5] == 0xFF && code[6] == 0x55 && code[7] == 0xFC
1322 && code[13] == 0x66 && code[14] == 0xCB)
1323 {
1324 STACK16FRAME *frame16 = MapSL((SEGPTR)NtCurrentTeb()->WOW32Reserved);
1325 char *stack16 = (char *)(frame16 + 1);
1326 DWORD argSize = frame16->ebp - (DWORD)stack16;
1327 char *stack32 = (char *)frame16->frame32 - argSize;
1328
1329 DWORD nArgsPopped = context->Esp - (DWORD)stack32;
1330
1331 TRACE("before SYSTHUNK hack: EBP: %08x ESP: %08x cur_stack: %p\n",
1332 context->Ebp, context->Esp, NtCurrentTeb()->WOW32Reserved);
1333
1334 NtCurrentTeb()->WOW32Reserved = frame16->frame32;
1335
1336 context->Esp = (DWORD)stack16 + nArgsPopped;
1337 context->Ebp = frame16->ebp;
1338
1339 TRACE("after SYSTHUNK hack: EBP: %08x ESP: %08x cur_stack: %p\n",
1340 context->Ebp, context->Esp, NtCurrentTeb()->WOW32Reserved);
1341 }
1342 }
1343 DEFINE_REGS_ENTRYPOINT( K32Thk1632Epilog, 0 )
1344
1345 /*********************************************************************
1346 * PK16FNF [KERNEL32.91]
1347 *
1348 * This routine fills in the supplied 13-byte (8.3 plus terminator)
1349 * string buffer with the 8.3 filename of a recently loaded 16-bit
1350 * module. It is unknown exactly what modules trigger this
1351 * mechanism or what purpose this serves. Win98 Explorer (and
1352 * probably also Win95 with IE 4 shell integration) calls this
1353 * several times during initialization.
1354 *
1355 * FIXME: find out what this really does and make it work.
1356 */
1357 void WINAPI PK16FNF(LPSTR strPtr)
1358 {
1359 FIXME("(%p): stub\n", strPtr);
1360
1361 /* fill in a fake filename that'll be easy to recognize */
1362 strcpy(strPtr, "WINESTUB.FIX");
1363 }
1364
1365 /***********************************************************************
1366 * 16->32 Flat Thunk routines:
1367 */
1368
1369 /***********************************************************************
1370 * ThunkConnect16 (KERNEL.651)
1371 * Connects a 32bit and a 16bit thunkbuffer.
1372 */
1373 UINT WINAPI ThunkConnect16(
1374 LPSTR module16, /* [in] name of win16 dll */
1375 LPSTR module32, /* [in] name of win32 dll */
1376 HINSTANCE16 hInst16, /* [in] hInst of win16 dll */
1377 DWORD dwReason, /* [in] initialisation argument */
1378 struct ThunkDataCommon *TD, /* [in/out] thunkbuffer */
1379 LPSTR thunkfun32, /* [in] win32 thunkfunction */
1380 WORD cs /* [in] CS of win16 dll */
1381 ) {
1382 BOOL directionSL;
1383
1384 if (!strncmp(TD->magic, "SL01", 4))
1385 {
1386 directionSL = TRUE;
1387
1388 TRACE("SL01 thunk %s (%p) -> %s (%s), Reason: %d\n",
1389 module16, TD, module32, thunkfun32, dwReason);
1390 }
1391 else if (!strncmp(TD->magic, "LS01", 4))
1392 {
1393 directionSL = FALSE;
1394
1395 TRACE("LS01 thunk %s (%p) <- %s (%s), Reason: %d\n",
1396 module16, TD, module32, thunkfun32, dwReason);
1397 }
1398 else
1399 {
1400 ERR("Invalid magic %c%c%c%c\n",
1401 TD->magic[0], TD->magic[1], TD->magic[2], TD->magic[3]);
1402 return 0;
1403 }
1404
1405 switch (dwReason)
1406 {
1407 case DLL_PROCESS_ATTACH:
1408 if (directionSL)
1409 {
1410 struct ThunkDataSL16 *SL16 = (struct ThunkDataSL16 *)TD;
1411 struct ThunkDataSL *SL = SL16->fpData;
1412
1413 if (SL == NULL)
1414 {
1415 SL = HeapAlloc(GetProcessHeap(), 0, sizeof(*SL));
1416
1417 SL->common = SL16->common;
1418 SL->flags1 = SL16->flags1;
1419 SL->flags2 = SL16->flags2;
1420
1421 SL->apiDB = MapSL(SL16->apiDatabase);
1422 SL->targetDB = NULL;
1423
1424 lstrcpynA(SL->pszDll16, module16, 255);
1425 lstrcpynA(SL->pszDll32, module32, 255);
1426
1427 /* We should create a SEGPTR to the ThunkDataSL,
1428 but since the contents are not in the original format,
1429 any access to this by 16-bit code would crash anyway. */
1430 SL16->spData = 0;
1431 SL16->fpData = SL;
1432 }
1433
1434
1435 if (SL->flags2 & 0x80000000)
1436 {
1437 TRACE("Preloading 32-bit library\n");
1438 LoadLibraryA(module32);
1439 }
1440 }
1441 else
1442 {
1443 /* nothing to do */
1444 }
1445 break;
1446
1447 case DLL_PROCESS_DETACH:
1448 /* FIXME: cleanup */
1449 break;
1450 }
1451
1452 return 1;
1453 }
1454
1455
1456 /***********************************************************************
1457 * C16ThkSL (KERNEL.630)
1458 */
1459
1460 void WINAPI C16ThkSL(CONTEXT *context)
1461 {
1462 LPBYTE stub = MapSL(context->Eax), x = stub;
1463 WORD cs = wine_get_cs();
1464 WORD ds = wine_get_ds();
1465
1466 /* We produce the following code:
1467 *
1468 * mov ax, __FLATDS
1469 * mov es, ax
1470 * movzx ecx, cx
1471 * mov edx, es:[ecx + $EDX]
1472 * push bp
1473 * push edx
1474 * push dx
1475 * push edx
1476 * call __FLATCS:__wine_call_from_16_thunk
1477 */
1478
1479 *x++ = 0xB8; *(WORD *)x = ds; x += sizeof(WORD);
1480 *x++ = 0x8E; *x++ = 0xC0;
1481 *x++ = 0x66; *x++ = 0x0F; *x++ = 0xB7; *x++ = 0xC9;
1482 *x++ = 0x67; *x++ = 0x66; *x++ = 0x26; *x++ = 0x8B;
1483 *x++ = 0x91; *(DWORD *)x = context->Edx; x += sizeof(DWORD);
1484
1485 *x++ = 0x55;
1486 *x++ = 0x66; *x++ = 0x52;
1487 *x++ = 0x52;
1488 *x++ = 0x66; *x++ = 0x52;
1489 *x++ = 0x66; *x++ = 0x9A;
1490 *(void **)x = __wine_call_from_16_thunk; x += sizeof(void *);
1491 *(WORD *)x = cs; x += sizeof(WORD);
1492
1493 /* Jump to the stub code just created */
1494 context->Eip = LOWORD(context->Eax);
1495 context->SegCs = HIWORD(context->Eax);
1496
1497 /* Since C16ThkSL got called by a jmp, we need to leave the
1498 original return address on the stack */
1499 context->Esp -= 4;
1500 }
1501
1502 /***********************************************************************
1503 * C16ThkSL01 (KERNEL.631)
1504 */
1505
1506 void WINAPI C16ThkSL01(CONTEXT *context)
1507 {
1508 LPBYTE stub = MapSL(context->Eax), x = stub;
1509
1510 if (stub)
1511 {
1512 struct ThunkDataSL16 *SL16 = MapSL(context->Edx);
1513 struct ThunkDataSL *td = SL16->fpData;
1514
1515 DWORD procAddress = (DWORD)GetProcAddress16(GetModuleHandle16("KERNEL"), (LPCSTR)631);
1516 WORD cs = wine_get_cs();
1517
1518 if (!td)
1519 {
1520 ERR("ThunkConnect16 was not called!\n");
1521 return;
1522 }
1523
1524 TRACE("Creating stub for ThunkDataSL %p\n", td);
1525
1526
1527 /* We produce the following code:
1528 *
1529 * xor eax, eax
1530 * mov edx, $td
1531 * call C16ThkSL01
1532 * push bp
1533 * push edx
1534 * push dx
1535 * push edx
1536 * call __FLATCS:__wine_call_from_16_thunk
1537 */
1538
1539 *x++ = 0x66; *x++ = 0x33; *x++ = 0xC0;
1540 *x++ = 0x66; *x++ = 0xBA; *(void **)x = td; x += sizeof(void *);
1541 *x++ = 0x9A; *(DWORD *)x = procAddress; x += sizeof(DWORD);
1542
1543 *x++ = 0x55;
1544 *x++ = 0x66; *x++ = 0x52;
1545 *x++ = 0x52;
1546 *x++ = 0x66; *x++ = 0x52;
1547 *x++ = 0x66; *x++ = 0x9A;
1548 *(void **)x = __wine_call_from_16_thunk; x += sizeof(void *);
1549 *(WORD *)x = cs; x += sizeof(WORD);
1550
1551 /* Jump to the stub code just created */
1552 context->Eip = LOWORD(context->Eax);
1553 context->SegCs = HIWORD(context->Eax);
1554
1555 /* Since C16ThkSL01 got called by a jmp, we need to leave the
1556 original return address on the stack */
1557 context->Esp -= 4;
1558 }
1559 else
1560 {
1561 struct ThunkDataSL *td = (struct ThunkDataSL *)context->Edx;
1562 DWORD targetNr = LOWORD(context->Ecx) / 4;
1563 struct SLTargetDB *tdb;
1564
1565 TRACE("Process %08x calling target %d of ThunkDataSL %p\n",
1566 GetCurrentProcessId(), targetNr, td);
1567
1568 for (tdb = td->targetDB; tdb; tdb = tdb->next)
1569 if (tdb->process == GetCurrentProcessId())
1570 break;
1571
1572 if (!tdb)
1573 {
1574 TRACE("Loading 32-bit library %s\n", td->pszDll32);
1575 LoadLibraryA(td->pszDll32);
1576
1577 for (tdb = td->targetDB; tdb; tdb = tdb->next)
1578 if (tdb->process == GetCurrentProcessId())
1579 break;
1580 }
1581
1582 if (tdb)
1583 {
1584 context->Edx = tdb->targetTable[targetNr];
1585
1586 TRACE("Call target is %08x\n", context->Edx);
1587 }
1588 else
1589 {
1590 WORD *stack = MapSL( MAKESEGPTR(context->SegSs, LOWORD(context->Esp)) );
1591 context->Edx = (context->Edx & ~0xffff) | HIWORD(td->apiDB[targetNr].errorReturnValue);
1592 context->Eax = (context->Eax & ~0xffff) | LOWORD(td->apiDB[targetNr].errorReturnValue);
1593 context->Eip = stack[2];
1594 context->SegCs = stack[3];
1595 context->Esp += td->apiDB[targetNr].nrArgBytes + 4;
1596
1597 ERR("Process %08x did not ThunkConnect32 %s to %s\n",
1598 GetCurrentProcessId(), td->pszDll32, td->pszDll16);
1599 }
1600 }
1601 }
1602
1603
1604 /***********************************************************************
1605 * 16<->32 Thunklet/Callback API:
1606 */
1607
1608 #include "pshpack1.h"
1609 typedef struct _THUNKLET
1610 {
1611 BYTE prefix_target;
1612 BYTE pushl_target;
1613 DWORD target;
1614
1615 BYTE prefix_relay;
1616 BYTE pushl_relay;
1617 DWORD relay;
1618
1619 BYTE jmp_glue;
1620 DWORD glue;
1621
1622 BYTE type;
1623 HINSTANCE16 owner;
1624 struct _THUNKLET *next;
1625 } THUNKLET;
1626 #include "poppack.h"
1627
1628 #define THUNKLET_TYPE_LS 1
1629 #define THUNKLET_TYPE_SL 2
1630
1631 static HANDLE ThunkletHeap = 0;
1632 static WORD ThunkletCodeSel;
1633 static THUNKLET *ThunkletAnchor = NULL;
1634
1635 static FARPROC ThunkletSysthunkGlueLS = 0;
1636 static SEGPTR ThunkletSysthunkGlueSL = 0;
1637
1638 static FARPROC ThunkletCallbackGlueLS = 0;
1639 static SEGPTR ThunkletCallbackGlueSL = 0;
1640
1641
1642 /* map a thunk allocated on ThunkletHeap to a 16-bit pointer */
1643 static inline SEGPTR get_segptr( void *thunk )
1644 {
1645 if (!thunk) return 0;
1646 return MAKESEGPTR( ThunkletCodeSel, (char *)thunk - (char *)ThunkletHeap );
1647 }
1648
1649 /***********************************************************************
1650 * THUNK_Init
1651 */
1652 static BOOL THUNK_Init(void)
1653 {
1654 LPBYTE thunk;
1655
1656 ThunkletHeap = HeapCreate( HEAP_CREATE_ENABLE_EXECUTE, 0x10000, 0x10000 );
1657 if (!ThunkletHeap) return FALSE;
1658
1659 ThunkletCodeSel = SELECTOR_AllocBlock( ThunkletHeap, 0x10000, WINE_LDT_FLAGS_CODE );
1660
1661 thunk = HeapAlloc( ThunkletHeap, 0, 5 );
1662 if (!thunk) return FALSE;
1663
1664 ThunkletSysthunkGlueLS = (FARPROC)thunk;
1665 *thunk++ = 0x58; /* popl eax */
1666 *thunk++ = 0xC3; /* ret */
1667
1668 ThunkletSysthunkGlueSL = get_segptr( thunk );
1669 *thunk++ = 0x66; *thunk++ = 0x58; /* popl eax */
1670 *thunk++ = 0xCB; /* lret */
1671
1672 return TRUE;
1673 }
1674
1675 /***********************************************************************
1676 * SetThunkletCallbackGlue (KERNEL.560)
1677 */
1678 void WINAPI SetThunkletCallbackGlue16( FARPROC glueLS, SEGPTR glueSL )
1679 {
1680 ThunkletCallbackGlueLS = glueLS;
1681 ThunkletCallbackGlueSL = glueSL;
1682 }
1683
1684
1685 /***********************************************************************
1686 * THUNK_FindThunklet
1687 */
1688 static THUNKLET *THUNK_FindThunklet( DWORD target, DWORD relay,
1689 DWORD glue, BYTE type )
1690 {
1691 THUNKLET *thunk;
1692
1693 for (thunk = ThunkletAnchor; thunk; thunk = thunk->next)
1694 if ( thunk->type == type
1695 && thunk->target == target
1696 && thunk->relay == relay
1697 && ( type == THUNKLET_TYPE_LS ?
1698 ( thunk->glue == glue - (DWORD)&thunk->type )
1699 : ( thunk->glue == glue ) ) )
1700 return thunk;
1701
1702 return NULL;
1703 }
1704
1705 /***********************************************************************
1706 * THUNK_AllocLSThunklet
1707 */
1708 static FARPROC THUNK_AllocLSThunklet( SEGPTR target, DWORD relay,
1709 FARPROC glue, HTASK16 owner )
1710 {
1711 THUNKLET *thunk = THUNK_FindThunklet( (DWORD)target, relay, (DWORD)glue,
1712 THUNKLET_TYPE_LS );
1713 if (!thunk)
1714 {
1715 TDB *pTask = GlobalLock16( owner );
1716
1717 if (!ThunkletHeap) THUNK_Init();
1718 if ( !(thunk = HeapAlloc( ThunkletHeap, 0, sizeof(THUNKLET) )) )
1719 return 0;
1720
1721 thunk->prefix_target = thunk->prefix_relay = 0x90;
1722 thunk->pushl_target = thunk->pushl_relay = 0x68;
1723 thunk->jmp_glue = 0xE9;
1724
1725 thunk->target = (DWORD)target;
1726 thunk->relay = relay;
1727 thunk->glue = (DWORD)glue - (DWORD)&thunk->type;
1728
1729 thunk->type = THUNKLET_TYPE_LS;
1730 thunk->owner = pTask? pTask->hInstance : 0;
1731
1732 thunk->next = ThunkletAnchor;
1733 ThunkletAnchor = thunk;
1734 }
1735
1736 return (FARPROC)thunk;
1737 }
1738
1739 /***********************************************************************
1740 * THUNK_AllocSLThunklet
1741 */
1742 static SEGPTR THUNK_AllocSLThunklet( FARPROC target, DWORD relay,
1743 SEGPTR glue, HTASK16 owner )
1744 {
1745 THUNKLET *thunk = THUNK_FindThunklet( (DWORD)target, relay, (DWORD)glue,
1746 THUNKLET_TYPE_SL );
1747 if (!thunk)
1748 {
1749 TDB *pTask = GlobalLock16( owner );
1750
1751 if (!ThunkletHeap) THUNK_Init();
1752 if ( !(thunk = HeapAlloc( ThunkletHeap, 0, sizeof(THUNKLET) )) )
1753 return 0;
1754
1755 thunk->prefix_target = thunk->prefix_relay = 0x66;
1756 thunk->pushl_target = thunk->pushl_relay = 0x68;
1757 thunk->jmp_glue = 0xEA;
1758
1759 thunk->target = (DWORD)target;
1760 thunk->relay = relay;
1761 thunk->glue = (DWORD)glue;
1762
1763 thunk->type = THUNKLET_TYPE_SL;
1764 thunk->owner = pTask? pTask->hInstance : 0;
1765
1766 thunk->next = ThunkletAnchor;
1767 ThunkletAnchor = thunk;
1768 }
1769
1770 return get_segptr( thunk );
1771 }
1772
1773 /**********************************************************************
1774 * IsLSThunklet
1775 */
1776 static BOOL16 IsLSThunklet( THUNKLET *thunk )
1777 {
1778 return thunk->prefix_target == 0x90 && thunk->pushl_target == 0x68
1779 && thunk->prefix_relay == 0x90 && thunk->pushl_relay == 0x68
1780 && thunk->jmp_glue == 0xE9 && thunk->type == THUNKLET_TYPE_LS;
1781 }
1782
1783 /**********************************************************************
1784 * IsSLThunklet (KERNEL.612)
1785 */
1786 BOOL16 WINAPI IsSLThunklet16( THUNKLET *thunk )
1787 {
1788 return thunk->prefix_target == 0x66 && thunk->pushl_target == 0x68
1789 && thunk->prefix_relay == 0x66 && thunk->pushl_relay == 0x68
1790 && thunk->jmp_glue == 0xEA && thunk->type == THUNKLET_TYPE_SL;
1791 }
1792
1793
1794
1795 /***********************************************************************
1796 * AllocLSThunkletSysthunk (KERNEL.607)
1797 */
1798 FARPROC WINAPI AllocLSThunkletSysthunk16( SEGPTR target,
1799 FARPROC relay, DWORD dummy )
1800 {
1801 if (!ThunkletSysthunkGlueLS) THUNK_Init();
1802 return THUNK_AllocLSThunklet( (SEGPTR)relay, (DWORD)target,
1803 ThunkletSysthunkGlueLS, GetCurrentTask() );
1804 }
1805
1806 /***********************************************************************
1807 * AllocSLThunkletSysthunk (KERNEL.608)
1808 */
1809 SEGPTR WINAPI AllocSLThunkletSysthunk16( FARPROC target,
1810 SEGPTR relay, DWORD dummy )
1811 {
1812 if (!ThunkletSysthunkGlueSL) THUNK_Init();
1813 return THUNK_AllocSLThunklet( (FARPROC)relay, (DWORD)target,
1814 ThunkletSysthunkGlueSL, GetCurrentTask() );
1815 }
1816
1817
1818 /***********************************************************************
1819 * AllocLSThunkletCallbackEx (KERNEL.567)
1820 */
1821 FARPROC WINAPI AllocLSThunkletCallbackEx16( SEGPTR target,
1822 DWORD relay, HTASK16 task )
1823 {
1824 THUNKLET *thunk = MapSL( target );
1825 if ( !thunk ) return NULL;
1826
1827 if ( IsSLThunklet16( thunk ) && thunk->relay == relay
1828 && thunk->glue == (DWORD)ThunkletCallbackGlueSL )
1829 return (FARPROC)thunk->target;
1830
1831 return THUNK_AllocLSThunklet( target, relay,
1832 ThunkletCallbackGlueLS, task );
1833 }
1834
1835 /***********************************************************************
1836 * AllocSLThunkletCallbackEx (KERNEL.568)
1837 */
1838 SEGPTR WINAPI AllocSLThunkletCallbackEx16( FARPROC target,
1839 DWORD relay, HTASK16 task )
1840 {
1841 THUNKLET *thunk = (THUNKLET *)target;
1842 if ( !thunk ) return 0;
1843
1844 if ( IsLSThunklet( thunk ) && thunk->relay == relay
1845 && thunk->glue == (DWORD)ThunkletCallbackGlueLS - (DWORD)&thunk->type )
1846 return (SEGPTR)thunk->target;
1847
1848 return THUNK_AllocSLThunklet( target, relay,
1849 ThunkletCallbackGlueSL, task );
1850 }
1851
1852 /***********************************************************************
1853 * AllocLSThunkletCallback (KERNEL.561)
1854 * AllocLSThunkletCallback_dup (KERNEL.606)
1855 */
1856 FARPROC WINAPI AllocLSThunkletCallback16( SEGPTR target, DWORD relay )
1857 {
1858 return AllocLSThunkletCallbackEx16( target, relay, GetCurrentTask() );
1859 }
1860
1861 /***********************************************************************
1862 * AllocSLThunkletCallback (KERNEL.562)
1863 * AllocSLThunkletCallback_dup (KERNEL.605)
1864 */
1865 SEGPTR WINAPI AllocSLThunkletCallback16( FARPROC target, DWORD relay )
1866 {
1867 return AllocSLThunkletCallbackEx16( target, relay, GetCurrentTask() );
1868 }
1869
1870 /***********************************************************************
1871 * FindLSThunkletCallback (KERNEL.563)
1872 * FindLSThunkletCallback_dup (KERNEL.609)
1873 */
1874 FARPROC WINAPI FindLSThunkletCallback( SEGPTR target, DWORD relay )
1875 {
1876 THUNKLET *thunk = MapSL( target );
1877 if ( thunk && IsSLThunklet16( thunk ) && thunk->relay == relay
1878 && thunk->glue == (DWORD)ThunkletCallbackGlueSL )
1879 return (FARPROC)thunk->target;
1880
1881 thunk = THUNK_FindThunklet( (DWORD)target, relay,
1882 (DWORD)ThunkletCallbackGlueLS,
1883 THUNKLET_TYPE_LS );
1884 return (FARPROC)thunk;
1885 }
1886
1887 /***********************************************************************
1888 * FindSLThunkletCallback (KERNEL.564)
1889 * FindSLThunkletCallback_dup (KERNEL.610)
1890 */
1891 SEGPTR WINAPI FindSLThunkletCallback( FARPROC target, DWORD relay )
1892 {
1893 THUNKLET *thunk = (THUNKLET *)target;
1894 if ( thunk && IsLSThunklet( thunk ) && thunk->relay == relay
1895 && thunk->glue == (DWORD)ThunkletCallbackGlueLS - (DWORD)&thunk->type )
1896 return (SEGPTR)thunk->target;
1897
1898 thunk = THUNK_FindThunklet( (DWORD)target, relay,
1899 (DWORD)ThunkletCallbackGlueSL,
1900 THUNKLET_TYPE_SL );
1901 return get_segptr( thunk );
1902 }
1903
1904
1905 /***********************************************************************
1906 * FreeThunklet (KERNEL.611)
1907 */
1908 BOOL16 WINAPI FreeThunklet16( DWORD unused1, DWORD unused2 )
1909 {
1910 return FALSE;
1911 }
1912
1913
1914 /***********************************************************************
1915 * Callback Client API
1916 */
1917
1918 #define N_CBC_FIXED 20
1919 #define N_CBC_VARIABLE 10
1920 #define N_CBC_TOTAL (N_CBC_FIXED + N_CBC_VARIABLE)
1921
1922 static SEGPTR CBClientRelay16[ N_CBC_TOTAL ];
1923 static FARPROC *CBClientRelay32[ N_CBC_TOTAL ];
1924
1925 /***********************************************************************
1926 * RegisterCBClient (KERNEL.619)
1927 */
1928 INT16 WINAPI RegisterCBClient16( INT16 wCBCId,
1929 SEGPTR relay16, FARPROC *relay32 )
1930 {
1931 /* Search for free Callback ID */
1932 if ( wCBCId == -1 )
1933 for ( wCBCId = N_CBC_FIXED; wCBCId < N_CBC_TOTAL; wCBCId++ )
1934 if ( !CBClientRelay16[ wCBCId ] )
1935 break;
1936
1937 /* Register Callback ID */
1938 if ( wCBCId > 0 && wCBCId < N_CBC_TOTAL )
1939 {
1940 CBClientRelay16[ wCBCId ] = relay16;
1941 CBClientRelay32[ wCBCId ] = relay32;
1942 }
1943 else
1944 wCBCId = 0;
1945
1946 return wCBCId;
1947 }
1948
1949 /***********************************************************************
1950 * UnRegisterCBClient (KERNEL.622)
1951 */
1952 INT16 WINAPI UnRegisterCBClient16( INT16 wCBCId,
1953 SEGPTR relay16, FARPROC *relay32 )
1954 {
1955 if ( wCBCId >= N_CBC_FIXED && wCBCId < N_CBC_TOTAL
1956 && CBClientRelay16[ wCBCId ] == relay16
1957 && CBClientRelay32[ wCBCId ] == relay32 )
1958 {
1959 CBClientRelay16[ wCBCId ] = 0;
1960 CBClientRelay32[ wCBCId ] = 0;
1961 }
1962 else
1963 wCBCId = 0;
1964
1965 return wCBCId;
1966 }
1967
1968
1969 /***********************************************************************
1970 * InitCBClient (KERNEL.623)
1971 */
1972 void WINAPI InitCBClient16( FARPROC glueLS )
1973 {
1974 HMODULE16 kernel = GetModuleHandle16( "KERNEL" );
1975 SEGPTR glueSL = (SEGPTR)GetProcAddress16( kernel, (LPCSTR)604 );
1976
1977 SetThunkletCallbackGlue16( glueLS, glueSL );
1978 }
1979
1980 /***********************************************************************
1981 * CBClientGlueSL (KERNEL.604)
1982 */
1983 void WINAPI CBClientGlueSL( CONTEXT *context )
1984 {
1985 /* Create stack frame */
1986 SEGPTR stackSeg = stack16_push( 12 );
1987 LPWORD stackLin = MapSL( stackSeg );
1988 SEGPTR glue, *glueTab;
1989
1990 stackLin[3] = (WORD)context->Ebp;
1991 stackLin[2] = (WORD)context->Esi;
1992 stackLin[1] = (WORD)context->Edi;
1993 stackLin[0] = (WORD)context->SegDs;
1994
1995 context->Ebp = OFFSETOF( stackSeg ) + 6;
1996 context->Esp = OFFSETOF( stackSeg ) - 4;
1997 context->SegGs = 0;
1998
1999 /* Jump to 16-bit relay code */
2000 glueTab = MapSL( CBClientRelay16[ stackLin[5] ] );
2001 glue = glueTab[ stackLin[4] ];
2002 context->SegCs = SELECTOROF( glue );
2003 context->Eip = OFFSETOF ( glue );
2004 }
2005
2006 /***********************************************************************
2007 * CBClientThunkSL (KERNEL.620)
2008 */
2009 extern DWORD CALL32_CBClient( FARPROC proc, LPWORD args, WORD *stackLin, DWORD *esi );
2010 void WINAPI CBClientThunkSL( CONTEXT *context )
2011 {
2012 /* Call 32-bit relay code */
2013
2014 LPWORD args = MapSL( MAKESEGPTR( context->SegSs, LOWORD(context->Ebp) ) );
2015 FARPROC proc = CBClientRelay32[ args[2] ][ args[1] ];
2016
2017 /* fill temporary area for the asm code (see comments in winebuild) */
2018 SEGPTR stack = stack16_push( 12 );
2019 LPWORD stackLin = MapSL(stack);
2020 /* stackLin[0] and stackLin[1] reserved for the 32-bit stack ptr */
2021 stackLin[2] = wine_get_ss();
2022 stackLin[3] = 0;
2023 stackLin[4] = OFFSETOF(stack) + 12;
2024 stackLin[5] = SELECTOROF(stack);
2025 stackLin[6] = OFFSETOF(CALL32_CBClientEx_RetAddr); /* overwrite return address */
2026 stackLin[7] = SELECTOROF(CALL32_CBClientEx_RetAddr);
2027 context->Eax = CALL32_CBClient( proc, args, stackLin + 4, &context->Esi );
2028 stack16_pop( 12 );
2029 }
2030
2031 /***********************************************************************
2032 * CBClientThunkSLEx (KERNEL.621)
2033 */
2034 extern DWORD CALL32_CBClientEx( FARPROC proc, LPWORD args, WORD *stackLin, DWORD *esi, INT *nArgs );
2035 void WINAPI CBClientThunkSLEx( CONTEXT *context )
2036 {
2037 /* Call 32-bit relay code */
2038
2039 LPWORD args = MapSL( MAKESEGPTR( context->SegSs, LOWORD(context->Ebp) ) );
2040 FARPROC proc = CBClientRelay32[ args[2] ][ args[1] ];
2041 INT nArgs;
2042 LPWORD stackLin;
2043
2044 /* fill temporary area for the asm code (see comments in winebuild) */
2045 SEGPTR stack = stack16_push( 24 );
2046 stackLin = MapSL(stack);
2047 stackLin[0] = OFFSETOF(stack) + 4;
2048 stackLin[1] = SELECTOROF(stack);
2049 stackLin[2] = wine_get_ds();
2050 stackLin[5] = OFFSETOF(stack) + 24;
2051 /* stackLin[6] and stackLin[7] reserved for the 32-bit stack ptr */
2052 stackLin[8] = wine_get_ss();
2053 stackLin[9] = 0;
2054 stackLin[10] = OFFSETOF(CALL32_CBClientEx_RetAddr);
2055 stackLin[11] = SELECTOROF(CALL32_CBClientEx_RetAddr);
2056
2057 context->Eax = CALL32_CBClientEx( proc, args, stackLin, &context->Esi, &nArgs );
2058 stack16_pop( 24 );
2059
2060 /* Restore registers saved by CBClientGlueSL */
2061 stackLin = (LPWORD)((LPBYTE)CURRENT_STACK16 + sizeof(STACK16FRAME) - 4);
2062 context->Ebp = (context->Ebp & ~0xffff) | stackLin[3];
2063 context->Esi = (context->Esi & ~0xffff) | stackLin[2];
2064 context->Edi = (context->Edi & ~0xffff) | stackLin[1];
2065 context->SegDs = stackLin[0];
2066 context->Esp += 16+nArgs;
2067
2068 /* Return to caller of CBClient thunklet */
2069 context->SegCs = stackLin[9];
2070 context->Eip = stackLin[8];
2071 }
2072
2073
2074 /***********************************************************************
2075 * Get16DLLAddress (KERNEL32.@)
2076 *
2077 * This function is used by a Win32s DLL if it wants to call a Win16 function.
2078 * A 16:16 segmented pointer to the function is returned.
2079 * Written without any docu.
2080 */
2081 SEGPTR WINAPI Get16DLLAddress(HMODULE16 handle, LPSTR func_name)
2082 {
2083 static WORD code_sel32;
2084 FARPROC16 proc_16;
2085 LPBYTE thunk;
2086
2087 if (!code_sel32)
2088 {
2089 if (!ThunkletHeap) THUNK_Init();
2090 code_sel32 = SELECTOR_AllocBlock( ThunkletHeap, 0x10000,
2091 WINE_LDT_FLAGS_CODE | WINE_LDT_FLAGS_32BIT );
2092 if (!code_sel32) return 0;
2093 }
2094 if (!(thunk = HeapAlloc( ThunkletHeap, 0, 32 ))) return 0;
2095
2096 if (!handle) handle = GetModuleHandle16("WIN32S16");
2097 proc_16 = GetProcAddress16(handle, func_name);
2098
2099 /* movl proc_16, $edx */
2100 *thunk++ = 0xba;
2101 *(FARPROC16 *)thunk = proc_16;
2102 thunk += sizeof(FARPROC16);
2103
2104 /* jmpl QT_Thunk */
2105 *thunk++ = 0xea;
2106 *(void **)thunk = QT_Thunk;
2107 thunk += sizeof(FARPROC16);
2108 *(WORD *)thunk = wine_get_cs();
2109
2110 return MAKESEGPTR( code_sel32, (char *)thunk - (char *)ThunkletHeap );
2111 }
2112
2113
2114 /***********************************************************************
2115 * GetWin16DOSEnv (KERNEL32.34)
2116 * Returns some internal value.... probably the default environment database?
2117 */
2118 DWORD WINAPI GetWin16DOSEnv(void)
2119 {
2120 FIXME("stub, returning 0\n");
2121 return 0;
2122 }
2123
2124 /**********************************************************************
2125 * GetPK16SysVar (KERNEL32.92)
2126 */
2127 LPVOID WINAPI GetPK16SysVar(void)
2128 {
2129 static BYTE PK16SysVar[128];
2130
2131 FIXME("()\n");
2132 return PK16SysVar;
2133 }
2134
2135 /**********************************************************************
2136 * CommonUnimpStub (KERNEL32.17)
2137 */
2138 void WINAPI __regs_CommonUnimpStub( CONTEXT *context )
2139 {
2140 FIXME("generic stub: %s\n", ((LPSTR)context->Eax ? (LPSTR)context->Eax : "?"));
2141
2142 switch ((context->Ecx >> 4) & 0x0f)
2143 {
2144 case 15: context->Eax = -1; break;
2145 case 14: context->Eax = 0x78; break;
2146 case 13: context->Eax = 0x32; break;
2147 case 1: context->Eax = 1; break;
2148 default: context->Eax = 0; break;
2149 }
2150
2151 context->Esp += (context->Ecx & 0x0f) * 4;
2152 }
2153 DEFINE_REGS_ENTRYPOINT( CommonUnimpStub, 0 )
2154
2155 /**********************************************************************
2156 * HouseCleanLogicallyDeadHandles (KERNEL32.33)
2157 */
2158 void WINAPI HouseCleanLogicallyDeadHandles(void)
2159 {
2160 /* Whatever this is supposed to do, our handles probably
2161 don't need it :-) */
2162 }
2163
2164 /**********************************************************************
2165 * @ (KERNEL32.100)
2166 */
2167 BOOL WINAPI _KERNEL32_100(HANDLE threadid,DWORD exitcode,DWORD x)
2168 {
2169 FIXME("(%p,%d,0x%08x): stub\n",threadid,exitcode,x);
2170 return TRUE;
2171 }
2172
2173 /**********************************************************************
2174 * @ (KERNEL32.99)
2175 *
2176 * Checks whether the clock has to be switched from daylight
2177 * savings time to standard time or vice versa.
2178 *
2179 */
2180 DWORD WINAPI _KERNEL32_99(DWORD x)
2181 {
2182 FIXME("(0x%08x): stub\n",x);
2183 return 1;
2184 }
2185
2186
2187 /***********************************************************************
2188 * Helper for k32 family functions
2189 */
2190 static void *user32_proc_address(const char *proc_name)
2191 {
2192 static HMODULE hUser32;
2193
2194 if(!hUser32) hUser32 = LoadLibraryA("user32.dll");
2195 return GetProcAddress(hUser32, proc_name);
2196 }
2197
2198 /***********************************************************************
2199 * k32CharToOemBuffA (KERNEL32.11)
2200 */
2201 BOOL WINAPI k32CharToOemBuffA(LPCSTR s, LPSTR d, DWORD len)
2202 {
2203 WCHAR *bufW;
2204
2205 if ((bufW = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) )))
2206 {
2207 MultiByteToWideChar( CP_ACP, 0, s, len, bufW, len );
2208 WideCharToMultiByte( CP_OEMCP, 0, bufW, len, d, len, NULL, NULL );
2209 HeapFree( GetProcessHeap(), 0, bufW );
2210 }
2211 return TRUE;
2212 }
2213
2214 /***********************************************************************
2215 * k32CharToOemA (KERNEL32.10)
2216 */
2217 BOOL WINAPI k32CharToOemA(LPCSTR s, LPSTR d)
2218 {
2219 if (!s || !d) return TRUE;
2220 return k32CharToOemBuffA( s, d, strlen(s) + 1 );
2221 }
2222
2223 /***********************************************************************
2224 * k32OemToCharBuffA (KERNEL32.13)
2225 */
2226 BOOL WINAPI k32OemToCharBuffA(LPCSTR s, LPSTR d, DWORD len)
2227 {
2228 WCHAR *bufW;
2229
2230 if ((bufW = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) )))
2231 {
2232 MultiByteToWideChar( CP_OEMCP, 0, s, len, bufW, len );
2233 WideCharToMultiByte( CP_ACP, 0, bufW, len, d, len, NULL, NULL );
2234 HeapFree( GetProcessHeap(), 0, bufW );
2235 }
2236 return TRUE;
2237 }
2238
2239 /***********************************************************************
2240 * k32OemToCharA (KERNEL32.12)
2241 */
2242 BOOL WINAPI k32OemToCharA(LPCSTR s, LPSTR d)
2243 {
2244 return k32OemToCharBuffA( s, d, strlen(s) + 1 );
2245 }
2246
2247 /**********************************************************************
2248 * k32LoadStringA (KERNEL32.14)
2249 */
2250 INT WINAPI k32LoadStringA(HINSTANCE instance, UINT resource_id,
2251 LPSTR buffer, INT buflen)
2252 {
2253 static INT (WINAPI *pLoadStringA)(HINSTANCE, UINT, LPSTR, INT);
2254
2255 if(!pLoadStringA) pLoadStringA = user32_proc_address("LoadStringA");
2256 return pLoadStringA(instance, resource_id, buffer, buflen);
2257 }
2258
2259 /***********************************************************************
2260 * k32wvsprintfA (KERNEL32.16)
2261 */
2262 INT WINAPI k32wvsprintfA(LPSTR buffer, LPCSTR spec, __ms_va_list args)
2263 {
2264 static INT (WINAPI *pwvsprintfA)(LPSTR, LPCSTR, __ms_va_list);
2265
2266 if(!pwvsprintfA) pwvsprintfA = user32_proc_address("wvsprintfA");
2267 return (*pwvsprintfA)(buffer, spec, args);
2268 }
2269
2270 /***********************************************************************
2271 * k32wsprintfA (KERNEL32.15)
2272 */
2273 INT WINAPIV k32wsprintfA(LPSTR buffer, LPCSTR spec, ...)
2274 {
2275 __ms_va_list args;
2276 INT res;
2277
2278 __ms_va_start(args, spec);
2279 res = k32wvsprintfA(buffer, spec, args);
2280 __ms_va_end(args);
2281 return res;
2282 }
2283
2284 /**********************************************************************
2285 * Catch (KERNEL.55)
2286 *
2287 * Real prototype is:
2288 * INT16 WINAPI Catch( LPCATCHBUF lpbuf );
2289 */
2290 void WINAPI Catch16( LPCATCHBUF lpbuf, CONTEXT *context )
2291 {
2292 /* Note: we don't save the current ss, as the catch buffer is */
2293 /* only 9 words long. Hopefully no one will have the silly */
2294 /* idea to change the current stack before calling Throw()... */
2295
2296 /* Windows uses:
2297 * lpbuf[0] = ip
2298 * lpbuf[1] = cs
2299 * lpbuf[2] = sp
2300 * lpbuf[3] = bp
2301 * lpbuf[4] = si
2302 * lpbuf[5] = di
2303 * lpbuf[6] = ds
2304 * lpbuf[7] = unused
2305 * lpbuf[8] = ss
2306 */
2307
2308 lpbuf[0] = LOWORD(context->Eip);
2309 lpbuf[1] = context->SegCs;
2310 /* Windows pushes 4 more words before saving sp */
2311 lpbuf[2] = LOWORD(context->Esp) - 4 * sizeof(WORD);
2312 lpbuf[3] = LOWORD(context->Ebp);
2313 lpbuf[4] = LOWORD(context->Esi);
2314 lpbuf[5] = LOWORD(context->Edi);
2315 lpbuf[6] = context->SegDs;
2316 lpbuf[7] = 0;
2317 lpbuf[8] = context->SegSs;
2318 context->Eax &= ~0xffff; /* Return 0 */
2319 }
2320
2321
2322 /**********************************************************************
2323 * Throw (KERNEL.56)
2324 *
2325 * Real prototype is:
2326 * INT16 WINAPI Throw( LPCATCHBUF lpbuf, INT16 retval );
2327 */
2328 void WINAPI Throw16( LPCATCHBUF lpbuf, INT16 retval, CONTEXT *context )
2329 {
2330 STACK16FRAME *pFrame;
2331 STACK32FRAME *frame32;
2332
2333 context->Eax = (context->Eax & ~0xffff) | (WORD)retval;
2334
2335 /* Find the frame32 corresponding to the frame16 we are jumping to */
2336 pFrame = CURRENT_STACK16;
2337 frame32 = pFrame->frame32;
2338 while (frame32 && frame32->frame16)
2339 {
2340 if (OFFSETOF(frame32->frame16) < OFFSETOF(NtCurrentTeb()->WOW32Reserved))
2341 break; /* Something strange is going on */
2342 if (OFFSETOF(frame32->frame16) > lpbuf[2])
2343 {
2344 /* We found the right frame */
2345 pFrame->frame32 = frame32;
2346 break;
2347 }
2348 frame32 = ((STACK16FRAME *)MapSL(frame32->frame16))->frame32;
2349 }
2350 RtlUnwind( &pFrame->frame32->frame, NULL, NULL, 0 );
2351
2352 context->Eip = lpbuf[0];
2353 context->SegCs = lpbuf[1];
2354 context->Esp = lpbuf[2] + 4 * sizeof(WORD) - sizeof(WORD) /*extra arg*/;
2355 context->Ebp = lpbuf[3];
2356 context->Esi = lpbuf[4];
2357 context->Edi = lpbuf[5];
2358 context->SegDs = lpbuf[6];
2359
2360 if (lpbuf[8] != context->SegSs)
2361 ERR("Switching stack segment with Throw() not supported; expect crash now\n" );
2362 }
2363
2364
2365 /*
2366 * 16-bit WOW routines (in KERNEL)
2367 */
2368
2369 /**********************************************************************
2370 * GetVDMPointer32W (KERNEL.516)
2371 */
2372 DWORD WINAPI GetVDMPointer32W16( SEGPTR vp, UINT16 fMode )
2373 {
2374 GlobalPageLock16(GlobalHandle16(SELECTOROF(vp)));
2375 return (DWORD)K32WOWGetVDMPointer( vp, 0, (DWORD)fMode );
2376 }
2377
2378 /***********************************************************************
2379 * LoadLibraryEx32W (KERNEL.513)
2380 */
2381 DWORD WINAPI LoadLibraryEx32W16( LPCSTR lpszLibFile, DWORD hFile, DWORD dwFlags )
2382 {
2383 HMODULE hModule;
2384 DWORD mutex_count;
2385 OFSTRUCT ofs;
2386 const char *p;
2387
2388 if (!lpszLibFile)
2389 {
2390 SetLastError(ERROR_INVALID_PARAMETER);
2391 return 0;
2392 }
2393
2394 /* if the file cannot be found, call LoadLibraryExA anyway, since it might be
2395 a builtin module. This case is handled in MODULE_LoadLibraryExA */
2396
2397 if ((p = strrchr( lpszLibFile, '.' )) && !strchr( p, '\\' )) /* got an extension */
2398 {
2399 if (OpenFile16( lpszLibFile, &ofs, OF_EXIST ) != HFILE_ERROR16)
2400 lpszLibFile = ofs.szPathName;
2401 }
2402 else
2403 {
2404 char buffer[MAX_PATH+4];
2405 strcpy( buffer, lpszLibFile );
2406 strcat( buffer, ".dll" );
2407 if (OpenFile16( buffer, &ofs, OF_EXIST ) != HFILE_ERROR16)
2408 lpszLibFile = ofs.szPathName;
2409 }
2410
2411 ReleaseThunkLock( &mutex_count );
2412 hModule = LoadLibraryExA( lpszLibFile, (HANDLE)hFile, dwFlags );
2413 RestoreThunkLock( mutex_count );
2414
2415 return (DWORD)hModule;
2416 }
2417
2418 /***********************************************************************
2419 * GetProcAddress32W (KERNEL.515)
2420 */
2421 DWORD WINAPI GetProcAddress32W16( DWORD hModule, LPCSTR lpszProc )
2422 {
2423 return (DWORD)GetProcAddress( (HMODULE)hModule, lpszProc );
2424 }
2425
2426 /***********************************************************************
2427 * FreeLibrary32W (KERNEL.514)
2428 */
2429 DWORD WINAPI FreeLibrary32W16( DWORD hLibModule )
2430 {
2431 BOOL retv;
2432 DWORD mutex_count;
2433
2434 ReleaseThunkLock( &mutex_count );
2435 retv = FreeLibrary( (HMODULE)hLibModule );
2436 RestoreThunkLock( mutex_count );
2437 return (DWORD)retv;
2438 }
2439
2440
2441 #define CPEX_DEST_STDCALL 0x00000000
2442 #define CPEX_DEST_CDECL 0x80000000
2443
2444 /**********************************************************************
2445 * WOW_CallProc32W
2446 */
2447 static DWORD WOW_CallProc32W16( FARPROC proc32, DWORD nrofargs, DWORD *args )
2448 {
2449 DWORD ret;
2450 DWORD mutex_count;
2451
2452 ReleaseThunkLock( &mutex_count );
2453 if (!proc32) ret = 0;
2454 else ret = call_entry_point( proc32, nrofargs & ~CPEX_DEST_CDECL, args );
2455 RestoreThunkLock( mutex_count );
2456
2457 TRACE("returns %08x\n",ret);
2458 return ret;
2459 }
2460
2461 /**********************************************************************
2462 * CallProc32W (KERNEL.517)
2463 */
2464 DWORD WINAPIV CallProc32W16( DWORD nrofargs, DWORD argconvmask, FARPROC proc32, VA_LIST16 valist )
2465 {
2466 DWORD args[32];
2467 unsigned int i;
2468
2469 TRACE("(%d,%d,%p args[",nrofargs,argconvmask,proc32);
2470
2471 for (i=0;i<nrofargs;i++)
2472 {
2473 if (argconvmask & (1<<i))
2474 {
2475 SEGPTR ptr = VA_ARG16( valist, SEGPTR );
2476 /* pascal convention, have to reverse the arguments order */
2477 args[nrofargs - i - 1] = (DWORD)MapSL(ptr);
2478 TRACE("%08x(%p),",ptr,MapSL(ptr));
2479 }
2480 else
2481 {
2482 DWORD arg = VA_ARG16( valist, DWORD );
2483 /* pascal convention, have to reverse the arguments order */
2484 args[nrofargs - i - 1] = arg;
2485 TRACE("%d,", arg);
2486 }
2487 }
2488 TRACE("])\n");
2489
2490 /* POP nrofargs DWORD arguments and 3 DWORD parameters */
2491 stack16_pop( (3 + nrofargs) * sizeof(DWORD) );
2492
2493 return WOW_CallProc32W16( proc32, nrofargs, args );
2494 }
2495
2496 /**********************************************************************
2497 * _CallProcEx32W (KERNEL.518)
2498 */
2499 DWORD WINAPIV CallProcEx32W16( DWORD nrofargs, DWORD argconvmask, FARPROC proc32, VA_LIST16 valist )
2500 {
2501 DWORD args[32];
2502 unsigned int i;
2503
2504 TRACE("(%d,%d,%p args[",nrofargs,argconvmask,proc32);
2505
2506 for (i=0;i<nrofargs;i++)
2507 {
2508 if (argconvmask & (1<<i))
2509 {
2510 SEGPTR ptr = VA_ARG16( valist, SEGPTR );
2511 args[i] = (DWORD)MapSL(ptr);
2512 TRACE("%08x(%p),",ptr,MapSL(ptr));
2513 }
2514 else
2515 {
2516 DWORD arg = VA_ARG16( valist, DWORD );
2517 args[i] = arg;
2518 TRACE("%d,", arg);
2519 }
2520 }
2521 TRACE("])\n");
2522 return WOW_CallProc32W16( proc32, nrofargs, args );
2523 }
2524
2525
2526 /**********************************************************************
2527 * WOW16Call (KERNEL.500)
2528 *
2529 * FIXME!!!
2530 *
2531 */
2532 DWORD WINAPIV WOW16Call(WORD x, WORD y, WORD z, VA_LIST16 args)
2533 {
2534 int i;
2535 DWORD calladdr;
2536 FIXME("(0x%04x,0x%04x,%d),calling (",x,y,z);
2537
2538 for (i=0;i<x/2;i++) {
2539 WORD a = VA_ARG16(args,WORD);
2540 DPRINTF("%04x ",a);
2541 }
2542 calladdr = VA_ARG16(args,DWORD);
2543 stack16_pop( 3*sizeof(WORD) + x + sizeof(DWORD) );
2544 DPRINTF(") calling address was 0x%08x\n",calladdr);
2545 return 0;
2546 }
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