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dplayx: Code to forward player creation
[wine/gsoc_dplay.git] / dlls / kernel32 / thunk.c
blobbe098b571fdee457d3585e035cba9607a3fc30de
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 #ifdef __i386__
35
36 #include "windef.h"
37 #include "winbase.h"
38 #include "winerror.h"
39 #include "winternl.h"
40 #include "wownt32.h"
41 #include "wine/winbase16.h"
42
43 #include "wine/debug.h"
44 #include "wine/library.h"
45 #include "kernel_private.h"
46 #include "kernel16_private.h"
47
48 WINE_DEFAULT_DEBUG_CHANNEL(thunk);
49
50 struct ThunkDataCommon
51 {
52 char magic[4]; /* 00 */
53 DWORD checksum; /* 04 */
54 };
55
56 struct ThunkDataLS16
57 {
58 struct ThunkDataCommon common; /* 00 */
59 SEGPTR targetTable; /* 08 */
60 DWORD firstTime; /* 0C */
61 };
62
63 struct ThunkDataLS32
64 {
65 struct ThunkDataCommon common; /* 00 */
66 DWORD * targetTable; /* 08 */
67 char lateBinding[4]; /* 0C */
68 DWORD flags; /* 10 */
69 DWORD reserved1; /* 14 */
70 DWORD reserved2; /* 18 */
71 DWORD offsetQTThunk; /* 1C */
72 DWORD offsetFTProlog; /* 20 */
73 };
74
75 struct ThunkDataSL16
76 {
77 struct ThunkDataCommon common; /* 00 */
78 DWORD flags1; /* 08 */
79 DWORD reserved1; /* 0C */
80 struct ThunkDataSL * fpData; /* 10 */
81 SEGPTR spData; /* 14 */
82 DWORD reserved2; /* 18 */
83 char lateBinding[4]; /* 1C */
84 DWORD flags2; /* 20 */
85 DWORD reserved3; /* 20 */
86 SEGPTR apiDatabase; /* 28 */
87 };
88
89 struct ThunkDataSL32
90 {
91 struct ThunkDataCommon common; /* 00 */
92 DWORD reserved1; /* 08 */
93 struct ThunkDataSL * data; /* 0C */
94 char lateBinding[4]; /* 10 */
95 DWORD flags; /* 14 */
96 DWORD reserved2; /* 18 */
97 DWORD reserved3; /* 1C */
98 DWORD offsetTargetTable; /* 20 */
99 };
100
101 struct ThunkDataSL
102 {
103 #if 0
104 This structure differs from the Win95 original,
105 but this should not matter since it is strictly internal to
106 the thunk handling routines in KRNL386 / KERNEL32.
107
108 For reference, here is the Win95 layout:
109
110 struct ThunkDataCommon common; /* 00 */
111 DWORD flags1; /* 08 */
112 SEGPTR apiDatabase; /* 0C */
113 WORD exePtr; /* 10 */
114 WORD segMBA; /* 12 */
115 DWORD lenMBATotal; /* 14 */
116 DWORD lenMBAUsed; /* 18 */
117 DWORD flags2; /* 1C */
118 char pszDll16[256]; /* 20 */
119 char pszDll32[256]; /*120 */
120
121 We do it differently since all our thunk handling is done
122 by 32-bit code. Therefore we do not need to provide
123 easy access to this data, especially the process target
124 table database, for 16-bit code.
125 #endif
126
127 struct ThunkDataCommon common;
128 DWORD flags1;
129 struct SLApiDB * apiDB;
130 struct SLTargetDB * targetDB;
131 DWORD flags2;
132 char pszDll16[256];
133 char pszDll32[256];
134 };
135
136 struct SLTargetDB
137 {
138 struct SLTargetDB * next;
139 DWORD process;
140 DWORD * targetTable;
141 };
142
143 struct SLApiDB
144 {
145 DWORD nrArgBytes;
146 DWORD errorReturnValue;
147 };
148
149 SEGPTR CALL32_CBClient_RetAddr = 0;
150 SEGPTR CALL32_CBClientEx_RetAddr = 0;
151
152 extern void __wine_call_from_16_thunk();
153
154 /* Push a DWORD on the 32-bit stack */
155 static inline void stack32_push( CONTEXT86 *context, DWORD val )
156 {
157 context->Esp -= sizeof(DWORD);
158 *(DWORD *)context->Esp = val;
159 }
160
161 /* Pop a DWORD from the 32-bit stack */
162 static inline DWORD stack32_pop( CONTEXT86 *context )
163 {
164 DWORD ret = *(DWORD *)context->Esp;
165 context->Esp += sizeof(DWORD);
166 return ret;
167 }
168
169 /***********************************************************************
170 * *
171 * Win95 internal thunks *
172 * *
173 ***********************************************************************/
174
175 /***********************************************************************
176 * LogApiThk (KERNEL.423)
177 */
178 void WINAPI LogApiThk( LPSTR func )
179 {
180 TRACE( "%s\n", debugstr_a(func) );
181 }
182
183 /***********************************************************************
184 * LogApiThkLSF (KERNEL32.42)
185 *
186 * NOTE: needs to preserve all registers!
187 */
188 void WINAPI __regs_LogApiThkLSF( LPSTR func, CONTEXT86 *context )
189 {
190 TRACE( "%s\n", debugstr_a(func) );
191 }
192 DEFINE_REGS_ENTRYPOINT( LogApiThkLSF, 1 )
193
194 /***********************************************************************
195 * LogApiThkSL (KERNEL32.44)
196 *
197 * NOTE: needs to preserve all registers!
198 */
199 void WINAPI __regs_LogApiThkSL( LPSTR func, CONTEXT86 *context )
200 {
201 TRACE( "%s\n", debugstr_a(func) );
202 }
203 DEFINE_REGS_ENTRYPOINT( LogApiThkSL, 1 )
204
205 /***********************************************************************
206 * LogCBThkSL (KERNEL32.47)
207 *
208 * NOTE: needs to preserve all registers!
209 */
210 void WINAPI __regs_LogCBThkSL( LPSTR func, CONTEXT86 *context )
211 {
212 TRACE( "%s\n", debugstr_a(func) );
213 }
214 DEFINE_REGS_ENTRYPOINT( LogCBThkSL, 1 )
215
216 /***********************************************************************
217 * Generates a FT_Prolog call.
218 *
219 * 0FB6D1 movzbl edx,cl
220 * 8B1495xxxxxxxx mov edx,[4*edx + targetTable]
221 * 68xxxxxxxx push FT_Prolog
222 * C3 lret
223 */
224 static void _write_ftprolog(LPBYTE relayCode ,DWORD *targetTable) {
225 LPBYTE x;
226
227 x = relayCode;
228 *x++ = 0x0f;*x++=0xb6;*x++=0xd1; /* movzbl edx,cl */
229 *x++ = 0x8B;*x++=0x14;*x++=0x95;*(DWORD**)x= targetTable;
230 x+=4; /* mov edx, [4*edx + targetTable] */
231 *x++ = 0x68; *(DWORD*)x = (DWORD)GetProcAddress(kernel32_handle,"FT_Prolog");
232 x+=4; /* push FT_Prolog */
233 *x++ = 0xC3; /* lret */
234 /* fill rest with 0xCC / int 3 */
235 }
236
237 /***********************************************************************
238 * _write_qtthunk (internal)
239 * Generates a QT_Thunk style call.
240 *
241 * 33C9 xor ecx, ecx
242 * 8A4DFC mov cl , [ebp-04]
243 * 8B148Dxxxxxxxx mov edx, [4*ecx + targetTable]
244 * B8yyyyyyyy mov eax, QT_Thunk
245 * FFE0 jmp eax
246 */
247 static void _write_qtthunk(
248 LPBYTE relayCode, /* [in] start of QT_Thunk stub */
249 DWORD *targetTable /* [in] start of thunk (for index lookup) */
250 ) {
251 LPBYTE x;
252
253 x = relayCode;
254 *x++ = 0x33;*x++=0xC9; /* xor ecx,ecx */
255 *x++ = 0x8A;*x++=0x4D;*x++=0xFC; /* movb cl,[ebp-04] */
256 *x++ = 0x8B;*x++=0x14;*x++=0x8D;*(DWORD**)x= targetTable;
257 x+=4; /* mov edx, [4*ecx + targetTable */
258 *x++ = 0xB8; *(DWORD*)x = (DWORD)GetProcAddress(kernel32_handle,"QT_Thunk");
259 x+=4; /* mov eax , QT_Thunk */
260 *x++ = 0xFF; *x++ = 0xE0; /* jmp eax */
261 /* should fill the rest of the 32 bytes with 0xCC */
262 }
263
264 /***********************************************************************
265 * _loadthunk
266 */
267 static LPVOID _loadthunk(LPCSTR module, LPCSTR func, LPCSTR module32,
268 struct ThunkDataCommon *TD32, DWORD checksum)
269 {
270 struct ThunkDataCommon *TD16;
271 HMODULE16 hmod;
272 int ordinal;
273
274 if ((hmod = LoadLibrary16(module)) <= 32)
275 {
276 ERR("(%s, %s, %s): Unable to load '%s', error %d\n",
277 module, func, module32, module, hmod);
278 return 0;
279 }
280
281 if ( !(ordinal = NE_GetOrdinal(hmod, func))
282 || !(TD16 = MapSL((SEGPTR)NE_GetEntryPointEx(hmod, ordinal, FALSE))))
283 {
284 ERR("Unable to find thunk data '%s' in %s, required by %s (conflicting/incorrect DLL versions !?).\n",
285 func, module, module32);
286 return 0;
287 }
288
289 if (TD32 && memcmp(TD16->magic, TD32->magic, 4))
290 {
291 ERR("(%s, %s, %s): Bad magic %c%c%c%c (should be %c%c%c%c)\n",
292 module, func, module32,
293 TD16->magic[0], TD16->magic[1], TD16->magic[2], TD16->magic[3],
294 TD32->magic[0], TD32->magic[1], TD32->magic[2], TD32->magic[3]);
295 return 0;
296 }
297
298 if (TD32 && TD16->checksum != TD32->checksum)
299 {
300 ERR("(%s, %s, %s): Wrong checksum %08x (should be %08x)\n",
301 module, func, module32, TD16->checksum, TD32->checksum);
302 return 0;
303 }
304
305 if (!TD32 && checksum && checksum != *(LPDWORD)TD16)
306 {
307 ERR("(%s, %s, %s): Wrong checksum %08x (should be %08x)\n",
308 module, func, module32, *(LPDWORD)TD16, checksum);
309 return 0;
310 }
311
312 return TD16;
313 }
314
315 /***********************************************************************
316 * GetThunkStuff (KERNEL32.53)
317 */
318 LPVOID WINAPI GetThunkStuff(LPCSTR module, LPCSTR func)
319 {
320 return _loadthunk(module, func, "<kernel>", NULL, 0L);
321 }
322
323 /***********************************************************************
324 * GetThunkBuff (KERNEL32.52)
325 * Returns a pointer to ThkBuf in the 16bit library SYSTHUNK.DLL.
326 */
327 LPVOID WINAPI GetThunkBuff(void)
328 {
329 return GetThunkStuff("SYSTHUNK.DLL", "ThkBuf");
330 }
331
332 /***********************************************************************
333 * ThunkConnect32 (KERNEL32.@)
334 * Connects a 32bit and a 16bit thunkbuffer.
335 */
336 UINT WINAPI ThunkConnect32(
337 struct ThunkDataCommon *TD, /* [in/out] thunkbuffer */
338 LPSTR thunkfun16, /* [in] win16 thunkfunction */
339 LPSTR module16, /* [in] name of win16 dll */
340 LPSTR module32, /* [in] name of win32 dll */
341 HMODULE hmod32, /* [in] hmodule of win32 dll */
342 DWORD dwReason /* [in] initialisation argument */
343 ) {
344 BOOL directionSL;
345
346 if (!strncmp(TD->magic, "SL01", 4))
347 {
348 directionSL = TRUE;
349
350 TRACE("SL01 thunk %s (%p) <- %s (%s), Reason: %d\n",
351 module32, TD, module16, thunkfun16, dwReason);
352 }
353 else if (!strncmp(TD->magic, "LS01", 4))
354 {
355 directionSL = FALSE;
356
357 TRACE("LS01 thunk %s (%p) -> %s (%s), Reason: %d\n",
358 module32, TD, module16, thunkfun16, dwReason);
359 }
360 else
361 {
362 ERR("Invalid magic %c%c%c%c\n",
363 TD->magic[0], TD->magic[1], TD->magic[2], TD->magic[3]);
364 return 0;
365 }
366
367 switch (dwReason)
368 {
369 case DLL_PROCESS_ATTACH:
370 {
371 struct ThunkDataCommon *TD16;
372 if (!(TD16 = _loadthunk(module16, thunkfun16, module32, TD, 0L)))
373 return 0;
374
375 if (directionSL)
376 {
377 struct ThunkDataSL32 *SL32 = (struct ThunkDataSL32 *)TD;
378 struct ThunkDataSL16 *SL16 = (struct ThunkDataSL16 *)TD16;
379 struct SLTargetDB *tdb;
380
381 if (SL16->fpData == NULL)
382 {
383 ERR("ThunkConnect16 was not called!\n");
384 return 0;
385 }
386
387 SL32->data = SL16->fpData;
388
389 tdb = HeapAlloc(GetProcessHeap(), 0, sizeof(*tdb));
390 tdb->process = GetCurrentProcessId();
391 tdb->targetTable = (DWORD *)(thunkfun16 + SL32->offsetTargetTable);
392
393 tdb->next = SL32->data->targetDB; /* FIXME: not thread-safe! */
394 SL32->data->targetDB = tdb;
395
396 TRACE("Process %08x allocated TargetDB entry for ThunkDataSL %p\n",
397 GetCurrentProcessId(), SL32->data);
398 }
399 else
400 {
401 struct ThunkDataLS32 *LS32 = (struct ThunkDataLS32 *)TD;
402 struct ThunkDataLS16 *LS16 = (struct ThunkDataLS16 *)TD16;
403
404 LS32->targetTable = MapSL(LS16->targetTable);
405
406 /* write QT_Thunk and FT_Prolog stubs */
407 _write_qtthunk ((LPBYTE)TD + LS32->offsetQTThunk, LS32->targetTable);
408 _write_ftprolog((LPBYTE)TD + LS32->offsetFTProlog, LS32->targetTable);
409 }
410 break;
411 }
412
413 case DLL_PROCESS_DETACH:
414 /* FIXME: cleanup */
415 break;
416 }
417
418 return 1;
419 }
420
421 /**********************************************************************
422 * QT_Thunk (KERNEL32.@)
423 *
424 * The target address is in EDX.
425 * The 16bit arguments start at ESP.
426 * The number of 16bit argument bytes is EBP-ESP-0x40 (64 Byte thunksetup).
427 * So the stack layout is 16bit argument bytes and then the 64 byte
428 * scratch buffer.
429 * The scratch buffer is used as work space by Windows' QT_Thunk
430 * function.
431 * As the programs unfortunately don't always provide a fixed size
432 * scratch buffer (danger, stack corruption ahead !!), we simply resort
433 * to copying over the whole EBP-ESP range to the 16bit stack
434 * (as there's no way to safely figure out the param count
435 * due to this misbehaviour of some programs).
436 * [ok]
437 *
438 * See DDJ article 9614c for a very good description of QT_Thunk (also
439 * available online !).
440 *
441 * FIXME: DDJ talks of certain register usage rules; I'm not sure
442 * whether we cover this 100%.
443 */
444 void WINAPI __regs_QT_Thunk( CONTEXT86 *context )
445 {
446 CONTEXT86 context16;
447 DWORD argsize;
448
449 context16 = *context;
450
451 context16.SegFs = wine_get_fs();
452 context16.SegGs = wine_get_gs();
453 context16.SegCs = HIWORD(context->Edx);
454 context16.Eip = LOWORD(context->Edx);
455 /* point EBP to the STACK16FRAME on the stack
456 * for the call_to_16 to set up the register content on calling */
457 context16.Ebp = OFFSETOF(NtCurrentTeb()->WOW32Reserved) + FIELD_OFFSET(STACK16FRAME,bp);
458
459 /*
460 * used to be (problematic):
461 * argsize = context->Ebp - context->Esp - 0x40;
462 * due to some programs abusing the API, we better assume the full
463 * EBP - ESP range for copying instead: */
464 argsize = context->Ebp - context->Esp;
465
466 /* ok, too much is insane; let's limit param count a bit again */
467 if (argsize > 64)
468 argsize = 64; /* 32 WORDs */
469
470 WOWCallback16Ex( 0, WCB16_REGS, argsize, (void *)context->Esp, (DWORD *)&context16 );
471 context->Eax = context16.Eax;
472 context->Edx = context16.Edx;
473 context->Ecx = context16.Ecx;
474
475 /* make sure to update the Win32 ESP, too, in order to throw away
476 * the number of parameters that the Win16 function
477 * accepted (that it popped from the corresponding Win16 stack) */
478 context->Esp += LOWORD(context16.Esp) -
479 ( OFFSETOF(NtCurrentTeb()->WOW32Reserved) - argsize );
480 }
481 DEFINE_REGS_ENTRYPOINT( QT_Thunk, 0 )
482
483
484 /**********************************************************************
485 * FT_Prolog (KERNEL32.@)
486 *
487 * The set of FT_... thunk routines is used instead of QT_Thunk,
488 * if structures have to be converted from 32-bit to 16-bit
489 * (change of member alignment, conversion of members).
490 *
491 * The thunk function (as created by the thunk compiler) calls
492 * FT_Prolog at the beginning, to set up a stack frame and
493 * allocate a 64 byte buffer on the stack.
494 * The input parameters (target address and some flags) are
495 * saved for later use by FT_Thunk.
496 *
497 * Input: EDX 16-bit target address (SEGPTR)
498 * CX bits 0..7 target number (in target table)
499 * bits 8..9 some flags (unclear???)
500 * bits 10..15 number of DWORD arguments
501 *
502 * Output: A new stackframe is created, and a 64 byte buffer
503 * allocated on the stack. The layout of the stack
504 * on return is as follows:
505 *
506 * (ebp+4) return address to caller of thunk function
507 * (ebp) old EBP
508 * (ebp-4) saved EBX register of caller
509 * (ebp-8) saved ESI register of caller
510 * (ebp-12) saved EDI register of caller
511 * (ebp-16) saved ECX register, containing flags
512 * (ebp-20) bitmap containing parameters that are to be converted
513 * by FT_Thunk; it is initialized to 0 by FT_Prolog and
514 * filled in by the thunk code before calling FT_Thunk
515 * (ebp-24)
516 * ... (unclear)
517 * (ebp-44)
518 * (ebp-48) saved EAX register of caller (unclear, never restored???)
519 * (ebp-52) saved EDX register, containing 16-bit thunk target
520 * (ebp-56)
521 * ... (unclear)
522 * (ebp-64)
523 *
524 * ESP is EBP-64 after return.
525 *
526 */
527 void WINAPI __regs_FT_Prolog( CONTEXT86 *context )
528 {
529 /* Build stack frame */
530 stack32_push(context, context->Ebp);
531 context->Ebp = context->Esp;
532
533 /* Allocate 64-byte Thunk Buffer */
534 context->Esp -= 64;
535 memset((char *)context->Esp, '\0', 64);
536
537 /* Store Flags (ECX) and Target Address (EDX) */
538 /* Save other registers to be restored later */
539 *(DWORD *)(context->Ebp - 4) = context->Ebx;
540 *(DWORD *)(context->Ebp - 8) = context->Esi;
541 *(DWORD *)(context->Ebp - 12) = context->Edi;
542 *(DWORD *)(context->Ebp - 16) = context->Ecx;
543
544 *(DWORD *)(context->Ebp - 48) = context->Eax;
545 *(DWORD *)(context->Ebp - 52) = context->Edx;
546 }
547 DEFINE_REGS_ENTRYPOINT( FT_Prolog, 0 )
548
549 /**********************************************************************
550 * FT_Thunk (KERNEL32.@)
551 *
552 * This routine performs the actual call to 16-bit code,
553 * similar to QT_Thunk. The differences are:
554 * - The call target is taken from the buffer created by FT_Prolog
555 * - Those arguments requested by the thunk code (by setting the
556 * corresponding bit in the bitmap at EBP-20) are converted
557 * from 32-bit pointers to segmented pointers (those pointers
558 * are guaranteed to point to structures copied to the stack
559 * by the thunk code, so we always use the 16-bit stack selector
560 * for those addresses).
561 *
562 * The bit #i of EBP-20 corresponds here to the DWORD starting at
563 * ESP+4 + 2*i.
564 *
565 * FIXME: It is unclear what happens if there are more than 32 WORDs
566 * of arguments, so that the single DWORD bitmap is no longer
567 * sufficient ...
568 */
569 void WINAPI __regs_FT_Thunk( CONTEXT86 *context )
570 {
571 DWORD mapESPrelative = *(DWORD *)(context->Ebp - 20);
572 DWORD callTarget = *(DWORD *)(context->Ebp - 52);
573
574 CONTEXT86 context16;
575 DWORD i, argsize;
576 DWORD newstack[32];
577 LPBYTE oldstack;
578
579 context16 = *context;
580
581 context16.SegFs = wine_get_fs();
582 context16.SegGs = wine_get_gs();
583 context16.SegCs = HIWORD(callTarget);
584 context16.Eip = LOWORD(callTarget);
585 context16.Ebp = OFFSETOF(NtCurrentTeb()->WOW32Reserved) + FIELD_OFFSET(STACK16FRAME,bp);
586
587 argsize = context->Ebp-context->Esp-0x40;
588 if (argsize > sizeof(newstack)) argsize = sizeof(newstack);
589 oldstack = (LPBYTE)context->Esp;
590
591 memcpy( newstack, oldstack, argsize );
592
593 for (i = 0; i < 32; i++) /* NOTE: What about > 32 arguments? */
594 if (mapESPrelative & (1 << i))
595 {
596 SEGPTR *arg = (SEGPTR *)newstack[i];
597 *arg = MAKESEGPTR(SELECTOROF(NtCurrentTeb()->WOW32Reserved),
598 OFFSETOF(NtCurrentTeb()->WOW32Reserved) - argsize
599 + (*(LPBYTE *)arg - oldstack));
600 }
601
602 WOWCallback16Ex( 0, WCB16_REGS, argsize, newstack, (DWORD *)&context16 );
603 context->Eax = context16.Eax;
604 context->Edx = context16.Edx;
605 context->Ecx = context16.Ecx;
606
607 context->Esp += LOWORD(context16.Esp) -
608 ( OFFSETOF(NtCurrentTeb()->WOW32Reserved) - argsize );
609
610 /* Copy modified buffers back to 32-bit stack */
611 memcpy( oldstack, newstack, argsize );
612 }
613 DEFINE_REGS_ENTRYPOINT( FT_Thunk, 0 )
614
615 /***********************************************************************
616 * FT_Exit0 (KERNEL32.@)
617 * FT_Exit4 (KERNEL32.@)
618 * FT_Exit8 (KERNEL32.@)
619 * FT_Exit12 (KERNEL32.@)
620 * FT_Exit16 (KERNEL32.@)
621 * FT_Exit20 (KERNEL32.@)
622 * FT_Exit24 (KERNEL32.@)
623 * FT_Exit28 (KERNEL32.@)
624 * FT_Exit32 (KERNEL32.@)
625 * FT_Exit36 (KERNEL32.@)
626 * FT_Exit40 (KERNEL32.@)
627 * FT_Exit44 (KERNEL32.@)
628 * FT_Exit48 (KERNEL32.@)
629 * FT_Exit52 (KERNEL32.@)
630 * FT_Exit56 (KERNEL32.@)
631 *
632 * One of the FT_ExitNN functions is called at the end of the thunk code.
633 * It removes the stack frame created by FT_Prolog, moves the function
634 * return from EBX to EAX (yes, FT_Thunk did use EAX for the return
635 * value, but the thunk code has moved it from EAX to EBX in the
636 * meantime ... :-), restores the caller's EBX, ESI, and EDI registers,
637 * and perform a return to the CALLER of the thunk code (while removing
638 * the given number of arguments from the caller's stack).
639 */
640 #define FT_EXIT_RESTORE_REGS \
641 "movl %ebx,%eax\n\t" \
642 "movl -4(%ebp),%ebx\n\t" \
643 "movl -8(%ebp),%esi\n\t" \
644 "movl -12(%ebp),%edi\n\t" \
645 "leave\n\t"
646
647 #define DEFINE_FT_Exit(n) \
648 __ASM_STDCALL_FUNC( FT_Exit ## n, 0, FT_EXIT_RESTORE_REGS "ret $" #n )
649
650 DEFINE_FT_Exit(0)
651 DEFINE_FT_Exit(4)
652 DEFINE_FT_Exit(8)
653 DEFINE_FT_Exit(12)
654 DEFINE_FT_Exit(16)
655 DEFINE_FT_Exit(20)
656 DEFINE_FT_Exit(24)
657 DEFINE_FT_Exit(28)
658 DEFINE_FT_Exit(32)
659 DEFINE_FT_Exit(36)
660 DEFINE_FT_Exit(40)
661 DEFINE_FT_Exit(44)
662 DEFINE_FT_Exit(48)
663 DEFINE_FT_Exit(52)
664 DEFINE_FT_Exit(56)
665
666
667 /***********************************************************************
668 * ThunkInitLS (KERNEL32.43)
669 * A thunkbuffer link routine
670 * The thunkbuf looks like:
671 *
672 * 00: DWORD length ? don't know exactly
673 * 04: SEGPTR ptr ? where does it point to?
674 * The pointer ptr is written into the first DWORD of 'thunk'.
675 * (probably correctly implemented)
676 * [ok probably]
677 * RETURNS
678 * segmented pointer to thunk?
679 */
680 DWORD WINAPI ThunkInitLS(
681 LPDWORD thunk, /* [in] win32 thunk */
682 LPCSTR thkbuf, /* [in] thkbuffer name in win16 dll */
683 DWORD len, /* [in] thkbuffer length */
684 LPCSTR dll16, /* [in] name of win16 dll */
685 LPCSTR dll32 /* [in] name of win32 dll (FIXME: not used?) */
686 ) {
687 LPDWORD addr;
688
689 if (!(addr = _loadthunk( dll16, thkbuf, dll32, NULL, len )))
690 return 0;
691
692 if (!addr[1])
693 return 0;
694 *thunk = addr[1];
695
696 return addr[1];
697 }
698
699 /***********************************************************************
700 * Common32ThkLS (KERNEL32.45)
701 *
702 * This is another 32->16 thunk, independent of the QT_Thunk/FT_Thunk
703 * style thunks. The basic difference is that the parameter conversion
704 * is done completely on the *16-bit* side here. Thus we do not call
705 * the 16-bit target directly, but call a common entry point instead.
706 * This entry function then calls the target according to the target
707 * number passed in the DI register.
708 *
709 * Input: EAX SEGPTR to the common 16-bit entry point
710 * CX offset in thunk table (target number * 4)
711 * DX error return value if execution fails (unclear???)
712 * EDX.HI number of DWORD parameters
713 *
714 * (Note that we need to move the thunk table offset from CX to DI !)
715 *
716 * The called 16-bit stub expects its stack to look like this:
717 * ...
718 * (esp+40) 32-bit arguments
719 * ...
720 * (esp+8) 32 byte of stack space available as buffer
721 * (esp) 8 byte return address for use with 0x66 lret
722 *
723 * The called 16-bit stub uses a 0x66 lret to return to 32-bit code,
724 * and uses the EAX register to return a DWORD return value.
725 * Thus we need to use a special assembly glue routine
726 * (CallRegisterLongProc instead of CallRegisterShortProc).
727 *
728 * Finally, we return to the caller, popping the arguments off
729 * the stack. The number of arguments to be popped is returned
730 * in the BL register by the called 16-bit routine.
731 *
732 */
733 void WINAPI __regs_Common32ThkLS( CONTEXT86 *context )
734 {
735 CONTEXT86 context16;
736 DWORD argsize;
737
738 context16 = *context;
739
740 context16.SegFs = wine_get_fs();
741 context16.SegGs = wine_get_gs();
742 context16.Edi = LOWORD(context->Ecx);
743 context16.SegCs = HIWORD(context->Eax);
744 context16.Eip = LOWORD(context->Eax);
745 context16.Ebp = OFFSETOF(NtCurrentTeb()->WOW32Reserved) + FIELD_OFFSET(STACK16FRAME,bp);
746
747 argsize = HIWORD(context->Edx) * 4;
748
749 /* FIXME: hack for stupid USER32 CallbackGlueLS routine */
750 if (context->Edx == context->Eip)
751 argsize = 6 * 4;
752
753 /* Note: the first 32 bytes we copy are just garbage from the 32-bit stack, in order to reserve
754 * the space. It is safe to do that since the register function prefix has reserved
755 * a lot more space than that below context->Esp.
756 */
757 WOWCallback16Ex( 0, WCB16_REGS, argsize + 32, (LPBYTE)context->Esp - 32, (DWORD *)&context16 );
758 context->Eax = context16.Eax;
759
760 /* Clean up caller's stack frame */
761 context->Esp += LOBYTE(context16.Ebx);
762 }
763 DEFINE_REGS_ENTRYPOINT( Common32ThkLS, 0 )
764
765 /***********************************************************************
766 * OT_32ThkLSF (KERNEL32.40)
767 *
768 * YET Another 32->16 thunk. The difference to Common32ThkLS is that
769 * argument processing is done on both the 32-bit and the 16-bit side:
770 * The 32-bit side prepares arguments, copying them onto the stack.
771 *
772 * When this routine is called, the first word on the stack is the
773 * number of argument bytes prepared by the 32-bit code, and EDX
774 * contains the 16-bit target address.
775 *
776 * The called 16-bit routine is another relaycode, doing further
777 * argument processing and then calling the real 16-bit target
778 * whose address is stored at [bp-04].
779 *
780 * The call proceeds using a normal CallRegisterShortProc.
781 * After return from the 16-bit relaycode, the arguments need
782 * to be copied *back* to the 32-bit stack, since the 32-bit
783 * relaycode processes output parameters.
784 *
785 * Note that we copy twice the number of arguments, since some of the
786 * 16-bit relaycodes in SYSTHUNK.DLL directly access the original
787 * arguments of the caller!
788 *
789 * (Note that this function seems only to be used for
790 * OLECLI32 -> OLECLI and OLESVR32 -> OLESVR thunking.)
791 */
792 void WINAPI __regs_OT_32ThkLSF( CONTEXT86 *context )
793 {
794 CONTEXT86 context16;
795 DWORD argsize;
796
797 context16 = *context;
798
799 context16.SegFs = wine_get_fs();
800 context16.SegGs = wine_get_gs();
801 context16.SegCs = HIWORD(context->Edx);
802 context16.Eip = LOWORD(context->Edx);
803 context16.Ebp = OFFSETOF(NtCurrentTeb()->WOW32Reserved) + FIELD_OFFSET(STACK16FRAME,bp);
804
805 argsize = 2 * *(WORD *)context->Esp + 2;
806
807 WOWCallback16Ex( 0, WCB16_REGS, argsize, (void *)context->Esp, (DWORD *)&context16 );
808 context->Eax = context16.Eax;
809 context->Edx = context16.Edx;
810
811 /* Copy modified buffers back to 32-bit stack */
812 memcpy( (LPBYTE)context->Esp,
813 (LPBYTE)CURRENT_STACK16 - argsize, argsize );
814
815 context->Esp += LOWORD(context16.Esp) -
816 ( OFFSETOF(NtCurrentTeb()->WOW32Reserved) - argsize );
817 }
818 DEFINE_REGS_ENTRYPOINT( OT_32ThkLSF, 0 )
819
820 /***********************************************************************
821 * ThunkInitLSF (KERNEL32.41)
822 * A thunk setup routine.
823 * Expects a pointer to a preinitialized thunkbuffer in the first argument
824 * looking like:
825 *| 00..03: unknown (pointer, check _41, _43, _46)
826 *| 04: EB1E jmp +0x20
827 *|
828 *| 06..23: unknown (space for replacement code, check .90)
829 *|
830 *| 24:>E800000000 call offset 29
831 *| 29:>58 pop eax ( target of call )
832 *| 2A: 2D25000000 sub eax,0x00000025 ( now points to offset 4 )
833 *| 2F: BAxxxxxxxx mov edx,xxxxxxxx
834 *| 34: 68yyyyyyyy push KERNEL32.90
835 *| 39: C3 ret
836 *|
837 *| 3A: EB1E jmp +0x20
838 *| 3E ... 59: unknown (space for replacement code?)
839 *| 5A: E8xxxxxxxx call <32bitoffset xxxxxxxx>
840 *| 5F: 5A pop edx
841 *| 60: 81EA25xxxxxx sub edx, 0x25xxxxxx
842 *| 66: 52 push edx
843 *| 67: 68xxxxxxxx push xxxxxxxx
844 *| 6C: 68yyyyyyyy push KERNEL32.89
845 *| 71: C3 ret
846 *| 72: end?
847 * This function checks if the code is there, and replaces the yyyyyyyy entries
848 * by the functionpointers.
849 * The thunkbuf looks like:
850 *
851 *| 00: DWORD length ? don't know exactly
852 *| 04: SEGPTR ptr ? where does it point to?
853 * The segpointer ptr is written into the first DWORD of 'thunk'.
854 * [ok probably]
855 * RETURNS
856 * unclear, pointer to win16 thkbuffer?
857 */
858 LPVOID WINAPI ThunkInitLSF(
859 LPBYTE thunk, /* [in] win32 thunk */
860 LPCSTR thkbuf, /* [in] thkbuffer name in win16 dll */
861 DWORD len, /* [in] length of thkbuffer */
862 LPCSTR dll16, /* [in] name of win16 dll */
863 LPCSTR dll32 /* [in] name of win32 dll */
864 ) {
865 LPDWORD addr,addr2;
866
867 /* FIXME: add checks for valid code ... */
868 /* write pointers to kernel32.89 and kernel32.90 (+ordinal base of 1) */
869 *(DWORD*)(thunk+0x35) = (DWORD)GetProcAddress(kernel32_handle,(LPSTR)90);
870 *(DWORD*)(thunk+0x6D) = (DWORD)GetProcAddress(kernel32_handle,(LPSTR)89);
871
872
873 if (!(addr = _loadthunk( dll16, thkbuf, dll32, NULL, len )))
874 return 0;
875
876 addr2 = MapSL(addr[1]);
877 if (HIWORD(addr2))
878 *(DWORD*)thunk = (DWORD)addr2;
879
880 return addr2;
881 }
882
883 /***********************************************************************
884 * FT_PrologPrime (KERNEL32.89)
885 *
886 * This function is called from the relay code installed by
887 * ThunkInitLSF. It replaces the location from where it was
888 * called by a standard FT_Prolog call stub (which is 'primed'
889 * by inserting the correct target table pointer).
890 * Finally, it calls that stub.
891 *
892 * Input: ECX target number + flags (passed through to FT_Prolog)
893 * (ESP) offset of location where target table pointer
894 * is stored, relative to the start of the relay code
895 * (ESP+4) pointer to start of relay code
896 * (this is where the FT_Prolog call stub gets written to)
897 *
898 * Note: The two DWORD arguments get popped off the stack.
899 *
900 */
901 void WINAPI __regs_FT_PrologPrime( CONTEXT86 *context )
902 {
903 DWORD targetTableOffset;
904 LPBYTE relayCode;
905
906 /* Compensate for the fact that the Wine register relay code thought
907 we were being called, although we were in fact jumped to */
908 context->Esp -= 4;
909
910 /* Write FT_Prolog call stub */
911 targetTableOffset = stack32_pop(context);
912 relayCode = (LPBYTE)stack32_pop(context);
913 _write_ftprolog( relayCode, *(DWORD **)(relayCode+targetTableOffset) );
914
915 /* Jump to the call stub just created */
916 context->Eip = (DWORD)relayCode;
917 }
918 DEFINE_REGS_ENTRYPOINT( FT_PrologPrime, 0 )
919
920 /***********************************************************************
921 * QT_ThunkPrime (KERNEL32.90)
922 *
923 * This function corresponds to FT_PrologPrime, but installs a
924 * call stub for QT_Thunk instead.
925 *
926 * Input: (EBP-4) target number (passed through to QT_Thunk)
927 * EDX target table pointer location offset
928 * EAX start of relay code
929 *
930 */
931 void WINAPI __regs_QT_ThunkPrime( CONTEXT86 *context )
932 {
933 DWORD targetTableOffset;
934 LPBYTE relayCode;
935
936 /* Compensate for the fact that the Wine register relay code thought
937 we were being called, although we were in fact jumped to */
938 context->Esp -= 4;
939
940 /* Write QT_Thunk call stub */
941 targetTableOffset = context->Edx;
942 relayCode = (LPBYTE)context->Eax;
943 _write_qtthunk( relayCode, *(DWORD **)(relayCode+targetTableOffset) );
944
945 /* Jump to the call stub just created */
946 context->Eip = (DWORD)relayCode;
947 }
948 DEFINE_REGS_ENTRYPOINT( QT_ThunkPrime, 0 )
949
950 /***********************************************************************
951 * ThunkInitSL (KERNEL32.46)
952 * Another thunkbuf link routine.
953 * The start of the thunkbuf looks like this:
954 * 00: DWORD length
955 * 04: SEGPTR address for thunkbuffer pointer
956 * [ok probably]
957 *
958 * RETURNS
959 * Nothing.
960 */
961 VOID WINAPI ThunkInitSL(
962 LPBYTE thunk, /* [in] start of thunkbuffer */
963 LPCSTR thkbuf, /* [in] name/ordinal of thunkbuffer in win16 dll */
964 DWORD len, /* [in] length of thunkbuffer */
965 LPCSTR dll16, /* [in] name of win16 dll containing the thkbuf */
966 LPCSTR dll32 /* [in] win32 dll. FIXME: strange, unused */
967 ) {
968 LPDWORD addr;
969
970 if (!(addr = _loadthunk( dll16, thkbuf, dll32, NULL, len )))
971 return;
972
973 *(DWORD*)MapSL(addr[1]) = (DWORD)thunk;
974 }
975
976 /**********************************************************************
977 * SSInit (KERNEL.700)
978 * RETURNS
979 * TRUE for success.
980 */
981 BOOL WINAPI SSInit16(void)
982 {
983 return TRUE;
984 }
985
986 /**********************************************************************
987 * SSOnBigStack (KERNEL32.87)
988 * Check if thunking is initialized (ss selector set up etc.)
989 * We do that differently, so just return TRUE.
990 * [ok]
991 * RETURNS
992 * TRUE for success.
993 */
994 BOOL WINAPI SSOnBigStack(void)
995 {
996 TRACE("Yes, thunking is initialized\n");
997 return TRUE;
998 }
999
1000 /**********************************************************************
1001 * SSConfirmSmallStack (KERNEL.704)
1002 *
1003 * Abort if not on small stack.
1004 *
1005 * This must be a register routine as it has to preserve *all* registers.
1006 */
1007 void WINAPI SSConfirmSmallStack( CONTEXT86 *context )
1008 {
1009 /* We are always on the small stack while in 16-bit code ... */
1010 }
1011
1012 /**********************************************************************
1013 * SSCall (KERNEL32.88)
1014 * One of the real thunking functions. This one seems to be for 32<->32
1015 * thunks. It should probably be capable of crossing processboundaries.
1016 *
1017 * And YES, I've seen nr=48 (somewhere in the Win95 32<->16 OLE coupling)
1018 * [ok]
1019 *
1020 * RETURNS
1021 * Thunked function result.
1022 */
1023 DWORD WINAPIV SSCall(
1024 DWORD nr, /* [in] number of argument bytes */
1025 DWORD flags, /* [in] FIXME: flags ? */
1026 FARPROC fun, /* [in] function to call */
1027 ... /* [in/out] arguments */
1028 ) {
1029 DWORD i,ret;
1030 DWORD *args = ((DWORD *)&fun) + 1;
1031
1032 if(TRACE_ON(thunk))
1033 {
1034 DPRINTF("(%d,0x%08x,%p,[",nr,flags,fun);
1035 for (i=0;i<nr/4;i++)
1036 DPRINTF("0x%08x,",args[i]);
1037 DPRINTF("])\n");
1038 }
1039 switch (nr) {
1040 case 0: ret = fun();
1041 break;
1042 case 4: ret = fun(args[0]);
1043 break;
1044 case 8: ret = fun(args[0],args[1]);
1045 break;
1046 case 12: ret = fun(args[0],args[1],args[2]);
1047 break;
1048 case 16: ret = fun(args[0],args[1],args[2],args[3]);
1049 break;
1050 case 20: ret = fun(args[0],args[1],args[2],args[3],args[4]);
1051 break;
1052 case 24: ret = fun(args[0],args[1],args[2],args[3],args[4],args[5]);
1053 break;
1054 case 28: ret = fun(args[0],args[1],args[2],args[3],args[4],args[5],args[6]);
1055 break;
1056 case 32: ret = fun(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7]);
1057 break;
1058 case 36: ret = fun(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8]);
1059 break;
1060 case 40: ret = fun(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8],args[9]);
1061 break;
1062 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]);
1063 break;
1064 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]);
1065 break;
1066 default:
1067 WARN("Unsupported nr of arguments, %d\n",nr);
1068 ret = 0;
1069 break;
1070
1071 }
1072 TRACE(" returning %d ...\n",ret);
1073 return ret;
1074 }
1075
1076 /**********************************************************************
1077 * W32S_BackTo32 (KERNEL32.51)
1078 */
1079 void WINAPI __regs_W32S_BackTo32( CONTEXT86 *context )
1080 {
1081 LPDWORD stack = (LPDWORD)context->Esp;
1082 FARPROC proc = (FARPROC)context->Eip;
1083
1084 context->Eax = proc( stack[1], stack[2], stack[3], stack[4], stack[5],
1085 stack[6], stack[7], stack[8], stack[9], stack[10] );
1086
1087 context->Eip = stack32_pop(context);
1088 }
1089 DEFINE_REGS_ENTRYPOINT( W32S_BackTo32, 0 )
1090
1091 /**********************************************************************
1092 * AllocSLCallback (KERNEL32.@)
1093 *
1094 * Allocate a 16->32 callback.
1095 *
1096 * NOTES
1097 * Win95 uses some structchains for callbacks. It allocates them
1098 * in blocks of 100 entries, size 32 bytes each, layout:
1099 * blockstart:
1100 *| 0: PTR nextblockstart
1101 *| 4: entry *first;
1102 *| 8: WORD sel ( start points to blockstart)
1103 *| A: WORD unknown
1104 * 100xentry:
1105 *| 00..17: Code
1106 *| 18: PDB *owning_process;
1107 *| 1C: PTR blockstart
1108 *
1109 * We ignore this for now. (Just a note for further developers)
1110 * FIXME: use this method, so we don't waste selectors...
1111 *
1112 * Following code is then generated by AllocSLCallback. The code is 16 bit, so
1113 * the 0x66 prefix switches from word->long registers.
1114 *
1115 *| 665A pop edx
1116 *| 6668x arg2 x pushl <arg2>
1117 *| 6652 push edx
1118 *| EAx arg1 x jmpf <arg1>
1119 *
1120 * returns the startaddress of this thunk.
1121 *
1122 * Note, that they look very similar to the ones allocates by THUNK_Alloc.
1123 * RETURNS
1124 * A segmented pointer to the start of the thunk
1125 */
1126 DWORD WINAPI
1127 AllocSLCallback(
1128 DWORD finalizer, /* [in] Finalizer function */
1129 DWORD callback /* [in] Callback function */
1130 ) {
1131 LPBYTE x,thunk = HeapAlloc( GetProcessHeap(), 0, 32 );
1132 WORD sel;
1133
1134 x=thunk;
1135 *x++=0x66;*x++=0x5a; /* popl edx */
1136 *x++=0x66;*x++=0x68;*(DWORD*)x=finalizer;x+=4; /* pushl finalizer */
1137 *x++=0x66;*x++=0x52; /* pushl edx */
1138 *x++=0xea;*(DWORD*)x=callback;x+=4; /* jmpf callback */
1139
1140 *(DWORD*)(thunk+18) = GetCurrentProcessId();
1141
1142 sel = SELECTOR_AllocBlock( thunk, 32, WINE_LDT_FLAGS_CODE );
1143 return (sel<<16)|0;
1144 }
1145
1146 /**********************************************************************
1147 * FreeSLCallback (KERNEL32.@)
1148 * Frees the specified 16->32 callback
1149 *
1150 * RETURNS
1151 * Nothing.
1152 */
1153 void WINAPI
1154 FreeSLCallback(
1155 DWORD x /* [in] 16 bit callback (segmented pointer?) */
1156 ) {
1157 FIXME("(0x%08x): stub\n",x);
1158 }
1159
1160 /**********************************************************************
1161 * AllocMappedBuffer (KERNEL32.38)
1162 *
1163 * This is an undocumented KERNEL32 function that
1164 * SMapLS's a GlobalAlloc'ed buffer.
1165 *
1166 * RETURNS
1167 * EDI register: pointer to buffer
1168 *
1169 * NOTES
1170 * The buffer is preceded by 8 bytes:
1171 * ...
1172 * edi+0 buffer
1173 * edi-4 SEGPTR to buffer
1174 * edi-8 some magic Win95 needs for SUnMapLS
1175 * (we use it for the memory handle)
1176 *
1177 * The SEGPTR is used by the caller!
1178 */
1179 void WINAPI __regs_AllocMappedBuffer(
1180 CONTEXT86 *context /* [in] EDI register: size of buffer to allocate */
1181 ) {
1182 HGLOBAL handle = GlobalAlloc(0, context->Edi + 8);
1183 DWORD *buffer = GlobalLock(handle);
1184 DWORD ptr = 0;
1185
1186 if (buffer)
1187 if (!(ptr = MapLS(buffer + 2)))
1188 {
1189 GlobalUnlock(handle);
1190 GlobalFree(handle);
1191 }
1192
1193 if (!ptr)
1194 context->Eax = context->Edi = 0;
1195 else
1196 {
1197 buffer[0] = (DWORD)handle;
1198 buffer[1] = ptr;
1199
1200 context->Eax = ptr;
1201 context->Edi = (DWORD)(buffer + 2);
1202 }
1203 }
1204 DEFINE_REGS_ENTRYPOINT( AllocMappedBuffer, 0 )
1205
1206 /**********************************************************************
1207 * FreeMappedBuffer (KERNEL32.39)
1208 *
1209 * Free a buffer allocated by AllocMappedBuffer
1210 *
1211 * RETURNS
1212 * Nothing.
1213 */
1214 void WINAPI __regs_FreeMappedBuffer(
1215 CONTEXT86 *context /* [in] EDI register: pointer to buffer */
1216 ) {
1217 if (context->Edi)
1218 {
1219 DWORD *buffer = (DWORD *)context->Edi - 2;
1220
1221 UnMapLS(buffer[1]);
1222
1223 GlobalUnlock((HGLOBAL)buffer[0]);
1224 GlobalFree((HGLOBAL)buffer[0]);
1225 }
1226 }
1227 DEFINE_REGS_ENTRYPOINT( FreeMappedBuffer, 0 )
1228
1229 /**********************************************************************
1230 * GetTEBSelectorFS (KERNEL.475)
1231 * Set the 16-bit %fs to the 32-bit %fs (current TEB selector)
1232 */
1233 void WINAPI GetTEBSelectorFS16(void)
1234 {
1235 CURRENT_STACK16->fs = wine_get_fs();
1236 }
1237
1238 /**********************************************************************
1239 * IsPeFormat (KERNEL.431)
1240 *
1241 * Determine if a file is a PE format executable.
1242 *
1243 * RETURNS
1244 * TRUE, if it is.
1245 * FALSE if the file could not be opened or is not a PE file.
1246 *
1247 * NOTES
1248 * If fn is given as NULL then the function expects hf16 to be valid.
1249 */
1250 BOOL16 WINAPI IsPeFormat16(
1251 LPSTR fn, /* [in] Filename to the executable */
1252 HFILE16 hf16) /* [in] An open file handle */
1253 {
1254 BOOL ret = FALSE;
1255 IMAGE_DOS_HEADER mzh;
1256 OFSTRUCT ofs;
1257 DWORD xmagic;
1258
1259 if (fn) hf16 = OpenFile16(fn,&ofs,OF_READ);
1260 if (hf16 == HFILE_ERROR16) return FALSE;
1261 _llseek16(hf16,0,SEEK_SET);
1262 if (sizeof(mzh)!=_lread16(hf16,&mzh,sizeof(mzh))) goto done;
1263 if (mzh.e_magic!=IMAGE_DOS_SIGNATURE) goto done;
1264 _llseek16(hf16,mzh.e_lfanew,SEEK_SET);
1265 if (sizeof(DWORD)!=_lread16(hf16,&xmagic,sizeof(DWORD))) goto done;
1266 ret = (xmagic == IMAGE_NT_SIGNATURE);
1267 done:
1268 _lclose16(hf16);
1269 return ret;
1270 }
1271
1272
1273 /***********************************************************************
1274 * K32Thk1632Prolog (KERNEL32.@)
1275 */
1276 void WINAPI __regs_K32Thk1632Prolog( CONTEXT86 *context )
1277 {
1278 LPBYTE code = (LPBYTE)context->Eip - 5;
1279
1280 /* Arrrgh! SYSTHUNK.DLL just has to re-implement another method
1281 of 16->32 thunks instead of using one of the standard methods!
1282 This means that SYSTHUNK.DLL itself switches to a 32-bit stack,
1283 and does a far call to the 32-bit code segment of OLECLI32/OLESVR32.
1284 Unfortunately, our CallTo/CallFrom mechanism is therefore completely
1285 bypassed, which means it will crash the next time the 32-bit OLE
1286 code thunks down again to 16-bit (this *will* happen!).
1287
1288 The following hack tries to recognize this situation.
1289 This is possible since the called stubs in OLECLI32/OLESVR32 all
1290 look exactly the same:
1291 00 E8xxxxxxxx call K32Thk1632Prolog
1292 05 FF55FC call [ebp-04]
1293 08 E8xxxxxxxx call K32Thk1632Epilog
1294 0D 66CB retf
1295
1296 If we recognize this situation, we try to simulate the actions
1297 of our CallTo/CallFrom mechanism by copying the 16-bit stack
1298 to our 32-bit stack, creating a proper STACK16FRAME and
1299 updating cur_stack. */
1300
1301 if ( code[5] == 0xFF && code[6] == 0x55 && code[7] == 0xFC
1302 && code[13] == 0x66 && code[14] == 0xCB)
1303 {
1304 DWORD argSize = context->Ebp - context->Esp;
1305 char *stack16 = (char *)context->Esp - 4;
1306 STACK16FRAME *frame16 = (STACK16FRAME *)stack16 - 1;
1307 STACK32FRAME *frame32 = NtCurrentTeb()->WOW32Reserved;
1308 char *stack32 = (char *)frame32 - argSize;
1309 WORD stackSel = SELECTOROF(frame32->frame16);
1310 DWORD stackBase = GetSelectorBase(stackSel);
1311
1312 TRACE("before SYSTHUNK hack: EBP: %08x ESP: %08x cur_stack: %p\n",
1313 context->Ebp, context->Esp, NtCurrentTeb()->WOW32Reserved);
1314
1315 memset(frame16, '\0', sizeof(STACK16FRAME));
1316 frame16->frame32 = frame32;
1317 frame16->ebp = context->Ebp;
1318
1319 memcpy(stack32, stack16, argSize);
1320 NtCurrentTeb()->WOW32Reserved = (void *)MAKESEGPTR(stackSel, (DWORD)frame16 - stackBase);
1321
1322 context->Esp = (DWORD)stack32 + 4;
1323 context->Ebp = context->Esp + argSize;
1324
1325 TRACE("after SYSTHUNK hack: EBP: %08x ESP: %08x cur_stack: %p\n",
1326 context->Ebp, context->Esp, NtCurrentTeb()->WOW32Reserved);
1327 }
1328
1329 /* entry_point is never used again once the entry point has
1330 been called. Thus we re-use it to hold the Win16Lock count */
1331 ReleaseThunkLock(&CURRENT_STACK16->entry_point);
1332 }
1333 DEFINE_REGS_ENTRYPOINT( K32Thk1632Prolog, 0 )
1334
1335 /***********************************************************************
1336 * K32Thk1632Epilog (KERNEL32.@)
1337 */
1338 void WINAPI __regs_K32Thk1632Epilog( CONTEXT86 *context )
1339 {
1340 LPBYTE code = (LPBYTE)context->Eip - 13;
1341
1342 RestoreThunkLock(CURRENT_STACK16->entry_point);
1343
1344 /* We undo the SYSTHUNK hack if necessary. See K32Thk1632Prolog. */
1345
1346 if ( code[5] == 0xFF && code[6] == 0x55 && code[7] == 0xFC
1347 && code[13] == 0x66 && code[14] == 0xCB)
1348 {
1349 STACK16FRAME *frame16 = MapSL((SEGPTR)NtCurrentTeb()->WOW32Reserved);
1350 char *stack16 = (char *)(frame16 + 1);
1351 DWORD argSize = frame16->ebp - (DWORD)stack16;
1352 char *stack32 = (char *)frame16->frame32 - argSize;
1353
1354 DWORD nArgsPopped = context->Esp - (DWORD)stack32;
1355
1356 TRACE("before SYSTHUNK hack: EBP: %08x ESP: %08x cur_stack: %p\n",
1357 context->Ebp, context->Esp, NtCurrentTeb()->WOW32Reserved);
1358
1359 NtCurrentTeb()->WOW32Reserved = frame16->frame32;
1360
1361 context->Esp = (DWORD)stack16 + nArgsPopped;
1362 context->Ebp = frame16->ebp;
1363
1364 TRACE("after SYSTHUNK hack: EBP: %08x ESP: %08x cur_stack: %p\n",
1365 context->Ebp, context->Esp, NtCurrentTeb()->WOW32Reserved);
1366 }
1367 }
1368 DEFINE_REGS_ENTRYPOINT( K32Thk1632Epilog, 0 )
1369
1370 /*********************************************************************
1371 * PK16FNF [KERNEL32.91]
1372 *
1373 * This routine fills in the supplied 13-byte (8.3 plus terminator)
1374 * string buffer with the 8.3 filename of a recently loaded 16-bit
1375 * module. It is unknown exactly what modules trigger this
1376 * mechanism or what purpose this serves. Win98 Explorer (and
1377 * probably also Win95 with IE 4 shell integration) calls this
1378 * several times during initialization.
1379 *
1380 * FIXME: find out what this really does and make it work.
1381 */
1382 void WINAPI PK16FNF(LPSTR strPtr)
1383 {
1384 FIXME("(%p): stub\n", strPtr);
1385
1386 /* fill in a fake filename that'll be easy to recognize */
1387 strcpy(strPtr, "WINESTUB.FIX");
1388 }
1389
1390 /***********************************************************************
1391 * 16->32 Flat Thunk routines:
1392 */
1393
1394 /***********************************************************************
1395 * ThunkConnect16 (KERNEL.651)
1396 * Connects a 32bit and a 16bit thunkbuffer.
1397 */
1398 UINT WINAPI ThunkConnect16(
1399 LPSTR module16, /* [in] name of win16 dll */
1400 LPSTR module32, /* [in] name of win32 dll */
1401 HINSTANCE16 hInst16, /* [in] hInst of win16 dll */
1402 DWORD dwReason, /* [in] initialisation argument */
1403 struct ThunkDataCommon *TD, /* [in/out] thunkbuffer */
1404 LPSTR thunkfun32, /* [in] win32 thunkfunction */
1405 WORD cs /* [in] CS of win16 dll */
1406 ) {
1407 BOOL directionSL;
1408
1409 if (!strncmp(TD->magic, "SL01", 4))
1410 {
1411 directionSL = TRUE;
1412
1413 TRACE("SL01 thunk %s (%p) -> %s (%s), Reason: %d\n",
1414 module16, TD, module32, thunkfun32, dwReason);
1415 }
1416 else if (!strncmp(TD->magic, "LS01", 4))
1417 {
1418 directionSL = FALSE;
1419
1420 TRACE("LS01 thunk %s (%p) <- %s (%s), Reason: %d\n",
1421 module16, TD, module32, thunkfun32, dwReason);
1422 }
1423 else
1424 {
1425 ERR("Invalid magic %c%c%c%c\n",
1426 TD->magic[0], TD->magic[1], TD->magic[2], TD->magic[3]);
1427 return 0;
1428 }
1429
1430 switch (dwReason)
1431 {
1432 case DLL_PROCESS_ATTACH:
1433 if (directionSL)
1434 {
1435 struct ThunkDataSL16 *SL16 = (struct ThunkDataSL16 *)TD;
1436 struct ThunkDataSL *SL = SL16->fpData;
1437
1438 if (SL == NULL)
1439 {
1440 SL = HeapAlloc(GetProcessHeap(), 0, sizeof(*SL));
1441
1442 SL->common = SL16->common;
1443 SL->flags1 = SL16->flags1;
1444 SL->flags2 = SL16->flags2;
1445
1446 SL->apiDB = MapSL(SL16->apiDatabase);
1447 SL->targetDB = NULL;
1448
1449 lstrcpynA(SL->pszDll16, module16, 255);
1450 lstrcpynA(SL->pszDll32, module32, 255);
1451
1452 /* We should create a SEGPTR to the ThunkDataSL,
1453 but since the contents are not in the original format,
1454 any access to this by 16-bit code would crash anyway. */
1455 SL16->spData = 0;
1456 SL16->fpData = SL;
1457 }
1458
1459
1460 if (SL->flags2 & 0x80000000)
1461 {
1462 TRACE("Preloading 32-bit library\n");
1463 LoadLibraryA(module32);
1464 }
1465 }
1466 else
1467 {
1468 /* nothing to do */
1469 }
1470 break;
1471
1472 case DLL_PROCESS_DETACH:
1473 /* FIXME: cleanup */
1474 break;
1475 }
1476
1477 return 1;
1478 }
1479
1480
1481 /***********************************************************************
1482 * C16ThkSL (KERNEL.630)
1483 */
1484
1485 void WINAPI C16ThkSL(CONTEXT86 *context)
1486 {
1487 LPBYTE stub = MapSL(context->Eax), x = stub;
1488 WORD cs = wine_get_cs();
1489 WORD ds = wine_get_ds();
1490
1491 /* We produce the following code:
1492 *
1493 * mov ax, __FLATDS
1494 * mov es, ax
1495 * movzx ecx, cx
1496 * mov edx, es:[ecx + $EDX]
1497 * push bp
1498 * push edx
1499 * push dx
1500 * push edx
1501 * call __FLATCS:__wine_call_from_16_thunk
1502 */
1503
1504 *x++ = 0xB8; *(WORD *)x = ds; x += sizeof(WORD);
1505 *x++ = 0x8E; *x++ = 0xC0;
1506 *x++ = 0x66; *x++ = 0x0F; *x++ = 0xB7; *x++ = 0xC9;
1507 *x++ = 0x67; *x++ = 0x66; *x++ = 0x26; *x++ = 0x8B;
1508 *x++ = 0x91; *(DWORD *)x = context->Edx; x += sizeof(DWORD);
1509
1510 *x++ = 0x55;
1511 *x++ = 0x66; *x++ = 0x52;
1512 *x++ = 0x52;
1513 *x++ = 0x66; *x++ = 0x52;
1514 *x++ = 0x66; *x++ = 0x9A;
1515 *(void **)x = __wine_call_from_16_thunk; x += sizeof(void *);
1516 *(WORD *)x = cs; x += sizeof(WORD);
1517
1518 /* Jump to the stub code just created */
1519 context->Eip = LOWORD(context->Eax);
1520 context->SegCs = HIWORD(context->Eax);
1521
1522 /* Since C16ThkSL got called by a jmp, we need to leave the
1523 original return address on the stack */
1524 context->Esp -= 4;
1525 }
1526
1527 /***********************************************************************
1528 * C16ThkSL01 (KERNEL.631)
1529 */
1530
1531 void WINAPI C16ThkSL01(CONTEXT86 *context)
1532 {
1533 LPBYTE stub = MapSL(context->Eax), x = stub;
1534
1535 if (stub)
1536 {
1537 struct ThunkDataSL16 *SL16 = MapSL(context->Edx);
1538 struct ThunkDataSL *td = SL16->fpData;
1539
1540 DWORD procAddress = (DWORD)GetProcAddress16(GetModuleHandle16("KERNEL"), (LPCSTR)631);
1541 WORD cs = wine_get_cs();
1542
1543 if (!td)
1544 {
1545 ERR("ThunkConnect16 was not called!\n");
1546 return;
1547 }
1548
1549 TRACE("Creating stub for ThunkDataSL %p\n", td);
1550
1551
1552 /* We produce the following code:
1553 *
1554 * xor eax, eax
1555 * mov edx, $td
1556 * call C16ThkSL01
1557 * push bp
1558 * push edx
1559 * push dx
1560 * push edx
1561 * call __FLATCS:__wine_call_from_16_thunk
1562 */
1563
1564 *x++ = 0x66; *x++ = 0x33; *x++ = 0xC0;
1565 *x++ = 0x66; *x++ = 0xBA; *(void **)x = td; x += sizeof(void *);
1566 *x++ = 0x9A; *(DWORD *)x = procAddress; x += sizeof(DWORD);
1567
1568 *x++ = 0x55;
1569 *x++ = 0x66; *x++ = 0x52;
1570 *x++ = 0x52;
1571 *x++ = 0x66; *x++ = 0x52;
1572 *x++ = 0x66; *x++ = 0x9A;
1573 *(void **)x = __wine_call_from_16_thunk; x += sizeof(void *);
1574 *(WORD *)x = cs; x += sizeof(WORD);
1575
1576 /* Jump to the stub code just created */
1577 context->Eip = LOWORD(context->Eax);
1578 context->SegCs = HIWORD(context->Eax);
1579
1580 /* Since C16ThkSL01 got called by a jmp, we need to leave the
1581 original return address on the stack */
1582 context->Esp -= 4;
1583 }
1584 else
1585 {
1586 struct ThunkDataSL *td = (struct ThunkDataSL *)context->Edx;
1587 DWORD targetNr = LOWORD(context->Ecx) / 4;
1588 struct SLTargetDB *tdb;
1589
1590 TRACE("Process %08x calling target %d of ThunkDataSL %p\n",
1591 GetCurrentProcessId(), targetNr, td);
1592
1593 for (tdb = td->targetDB; tdb; tdb = tdb->next)
1594 if (tdb->process == GetCurrentProcessId())
1595 break;
1596
1597 if (!tdb)
1598 {
1599 TRACE("Loading 32-bit library %s\n", td->pszDll32);
1600 LoadLibraryA(td->pszDll32);
1601
1602 for (tdb = td->targetDB; tdb; tdb = tdb->next)
1603 if (tdb->process == GetCurrentProcessId())
1604 break;
1605 }
1606
1607 if (tdb)
1608 {
1609 context->Edx = tdb->targetTable[targetNr];
1610
1611 TRACE("Call target is %08x\n", context->Edx);
1612 }
1613 else
1614 {
1615 WORD *stack = MapSL( MAKESEGPTR(context->SegSs, LOWORD(context->Esp)) );
1616 context->Edx = (context->Edx & ~0xffff) | HIWORD(td->apiDB[targetNr].errorReturnValue);
1617 context->Eax = (context->Eax & ~0xffff) | LOWORD(td->apiDB[targetNr].errorReturnValue);
1618 context->Eip = stack[2];
1619 context->SegCs = stack[3];
1620 context->Esp += td->apiDB[targetNr].nrArgBytes + 4;
1621
1622 ERR("Process %08x did not ThunkConnect32 %s to %s\n",
1623 GetCurrentProcessId(), td->pszDll32, td->pszDll16);
1624 }
1625 }
1626 }
1627
1628
1629 /***********************************************************************
1630 * 16<->32 Thunklet/Callback API:
1631 */
1632
1633 #include "pshpack1.h"
1634 typedef struct _THUNKLET
1635 {
1636 BYTE prefix_target;
1637 BYTE pushl_target;
1638 DWORD target;
1639
1640 BYTE prefix_relay;
1641 BYTE pushl_relay;
1642 DWORD relay;
1643
1644 BYTE jmp_glue;
1645 DWORD glue;
1646
1647 BYTE type;
1648 HINSTANCE16 owner;
1649 struct _THUNKLET *next;
1650 } THUNKLET;
1651 #include "poppack.h"
1652
1653 #define THUNKLET_TYPE_LS 1
1654 #define THUNKLET_TYPE_SL 2
1655
1656 static HANDLE ThunkletHeap = 0;
1657 static WORD ThunkletCodeSel;
1658 static THUNKLET *ThunkletAnchor = NULL;
1659
1660 static FARPROC ThunkletSysthunkGlueLS = 0;
1661 static SEGPTR ThunkletSysthunkGlueSL = 0;
1662
1663 static FARPROC ThunkletCallbackGlueLS = 0;
1664 static SEGPTR ThunkletCallbackGlueSL = 0;
1665
1666
1667 /* map a thunk allocated on ThunkletHeap to a 16-bit pointer */
1668 static inline SEGPTR get_segptr( void *thunk )
1669 {
1670 if (!thunk) return 0;
1671 return MAKESEGPTR( ThunkletCodeSel, (char *)thunk - (char *)ThunkletHeap );
1672 }
1673
1674 /***********************************************************************
1675 * THUNK_Init
1676 */
1677 static BOOL THUNK_Init(void)
1678 {
1679 LPBYTE thunk;
1680
1681 ThunkletHeap = HeapCreate( 0, 0x10000, 0x10000 );
1682 if (!ThunkletHeap) return FALSE;
1683
1684 ThunkletCodeSel = SELECTOR_AllocBlock( ThunkletHeap, 0x10000, WINE_LDT_FLAGS_CODE );
1685
1686 thunk = HeapAlloc( ThunkletHeap, 0, 5 );
1687 if (!thunk) return FALSE;
1688
1689 ThunkletSysthunkGlueLS = (FARPROC)thunk;
1690 *thunk++ = 0x58; /* popl eax */
1691 *thunk++ = 0xC3; /* ret */
1692
1693 ThunkletSysthunkGlueSL = get_segptr( thunk );
1694 *thunk++ = 0x66; *thunk++ = 0x58; /* popl eax */
1695 *thunk++ = 0xCB; /* lret */
1696
1697 return TRUE;
1698 }
1699
1700 /***********************************************************************
1701 * SetThunkletCallbackGlue (KERNEL.560)
1702 */
1703 void WINAPI SetThunkletCallbackGlue16( FARPROC glueLS, SEGPTR glueSL )
1704 {
1705 ThunkletCallbackGlueLS = glueLS;
1706 ThunkletCallbackGlueSL = glueSL;
1707 }
1708
1709
1710 /***********************************************************************
1711 * THUNK_FindThunklet
1712 */
1713 static THUNKLET *THUNK_FindThunklet( DWORD target, DWORD relay,
1714 DWORD glue, BYTE type )
1715 {
1716 THUNKLET *thunk;
1717
1718 for (thunk = ThunkletAnchor; thunk; thunk = thunk->next)
1719 if ( thunk->type == type
1720 && thunk->target == target
1721 && thunk->relay == relay
1722 && ( type == THUNKLET_TYPE_LS ?
1723 ( thunk->glue == glue - (DWORD)&thunk->type )
1724 : ( thunk->glue == glue ) ) )
1725 return thunk;
1726
1727 return NULL;
1728 }
1729
1730 /***********************************************************************
1731 * THUNK_AllocLSThunklet
1732 */
1733 static FARPROC THUNK_AllocLSThunklet( SEGPTR target, DWORD relay,
1734 FARPROC glue, HTASK16 owner )
1735 {
1736 THUNKLET *thunk = THUNK_FindThunklet( (DWORD)target, relay, (DWORD)glue,
1737 THUNKLET_TYPE_LS );
1738 if (!thunk)
1739 {
1740 TDB *pTask = GlobalLock16( owner );
1741
1742 if (!ThunkletHeap) THUNK_Init();
1743 if ( !(thunk = HeapAlloc( ThunkletHeap, 0, sizeof(THUNKLET) )) )
1744 return 0;
1745
1746 thunk->prefix_target = thunk->prefix_relay = 0x90;
1747 thunk->pushl_target = thunk->pushl_relay = 0x68;
1748 thunk->jmp_glue = 0xE9;
1749
1750 thunk->target = (DWORD)target;
1751 thunk->relay = relay;
1752 thunk->glue = (DWORD)glue - (DWORD)&thunk->type;
1753
1754 thunk->type = THUNKLET_TYPE_LS;
1755 thunk->owner = pTask? pTask->hInstance : 0;
1756
1757 thunk->next = ThunkletAnchor;
1758 ThunkletAnchor = thunk;
1759 }
1760
1761 return (FARPROC)thunk;
1762 }
1763
1764 /***********************************************************************
1765 * THUNK_AllocSLThunklet
1766 */
1767 static SEGPTR THUNK_AllocSLThunklet( FARPROC target, DWORD relay,
1768 SEGPTR glue, HTASK16 owner )
1769 {
1770 THUNKLET *thunk = THUNK_FindThunklet( (DWORD)target, relay, (DWORD)glue,
1771 THUNKLET_TYPE_SL );
1772 if (!thunk)
1773 {
1774 TDB *pTask = GlobalLock16( owner );
1775
1776 if (!ThunkletHeap) THUNK_Init();
1777 if ( !(thunk = HeapAlloc( ThunkletHeap, 0, sizeof(THUNKLET) )) )
1778 return 0;
1779
1780 thunk->prefix_target = thunk->prefix_relay = 0x66;
1781 thunk->pushl_target = thunk->pushl_relay = 0x68;
1782 thunk->jmp_glue = 0xEA;
1783
1784 thunk->target = (DWORD)target;
1785 thunk->relay = relay;
1786 thunk->glue = (DWORD)glue;
1787
1788 thunk->type = THUNKLET_TYPE_SL;
1789 thunk->owner = pTask? pTask->hInstance : 0;
1790
1791 thunk->next = ThunkletAnchor;
1792 ThunkletAnchor = thunk;
1793 }
1794
1795 return get_segptr( thunk );
1796 }
1797
1798 /**********************************************************************
1799 * IsLSThunklet
1800 */
1801 static BOOL16 IsLSThunklet( THUNKLET *thunk )
1802 {
1803 return thunk->prefix_target == 0x90 && thunk->pushl_target == 0x68
1804 && thunk->prefix_relay == 0x90 && thunk->pushl_relay == 0x68
1805 && thunk->jmp_glue == 0xE9 && thunk->type == THUNKLET_TYPE_LS;
1806 }
1807
1808 /**********************************************************************
1809 * IsSLThunklet (KERNEL.612)
1810 */
1811 BOOL16 WINAPI IsSLThunklet16( THUNKLET *thunk )
1812 {
1813 return thunk->prefix_target == 0x66 && thunk->pushl_target == 0x68
1814 && thunk->prefix_relay == 0x66 && thunk->pushl_relay == 0x68
1815 && thunk->jmp_glue == 0xEA && thunk->type == THUNKLET_TYPE_SL;
1816 }
1817
1818
1819
1820 /***********************************************************************
1821 * AllocLSThunkletSysthunk (KERNEL.607)
1822 */
1823 FARPROC WINAPI AllocLSThunkletSysthunk16( SEGPTR target,
1824 FARPROC relay, DWORD dummy )
1825 {
1826 if (!ThunkletSysthunkGlueLS) THUNK_Init();
1827 return THUNK_AllocLSThunklet( (SEGPTR)relay, (DWORD)target,
1828 ThunkletSysthunkGlueLS, GetCurrentTask() );
1829 }
1830
1831 /***********************************************************************
1832 * AllocSLThunkletSysthunk (KERNEL.608)
1833 */
1834 SEGPTR WINAPI AllocSLThunkletSysthunk16( FARPROC target,
1835 SEGPTR relay, DWORD dummy )
1836 {
1837 if (!ThunkletSysthunkGlueSL) THUNK_Init();
1838 return THUNK_AllocSLThunklet( (FARPROC)relay, (DWORD)target,
1839 ThunkletSysthunkGlueSL, GetCurrentTask() );
1840 }
1841
1842
1843 /***********************************************************************
1844 * AllocLSThunkletCallbackEx (KERNEL.567)
1845 */
1846 FARPROC WINAPI AllocLSThunkletCallbackEx16( SEGPTR target,
1847 DWORD relay, HTASK16 task )
1848 {
1849 THUNKLET *thunk = MapSL( target );
1850 if ( !thunk ) return NULL;
1851
1852 if ( IsSLThunklet16( thunk ) && thunk->relay == relay
1853 && thunk->glue == (DWORD)ThunkletCallbackGlueSL )
1854 return (FARPROC)thunk->target;
1855
1856 return THUNK_AllocLSThunklet( target, relay,
1857 ThunkletCallbackGlueLS, task );
1858 }
1859
1860 /***********************************************************************
1861 * AllocSLThunkletCallbackEx (KERNEL.568)
1862 */
1863 SEGPTR WINAPI AllocSLThunkletCallbackEx16( FARPROC target,
1864 DWORD relay, HTASK16 task )
1865 {
1866 THUNKLET *thunk = (THUNKLET *)target;
1867 if ( !thunk ) return 0;
1868
1869 if ( IsLSThunklet( thunk ) && thunk->relay == relay
1870 && thunk->glue == (DWORD)ThunkletCallbackGlueLS - (DWORD)&thunk->type )
1871 return (SEGPTR)thunk->target;
1872
1873 return THUNK_AllocSLThunklet( target, relay,
1874 ThunkletCallbackGlueSL, task );
1875 }
1876
1877 /***********************************************************************
1878 * AllocLSThunkletCallback (KERNEL.561)
1879 * AllocLSThunkletCallback_dup (KERNEL.606)
1880 */
1881 FARPROC WINAPI AllocLSThunkletCallback16( SEGPTR target, DWORD relay )
1882 {
1883 return AllocLSThunkletCallbackEx16( target, relay, GetCurrentTask() );
1884 }
1885
1886 /***********************************************************************
1887 * AllocSLThunkletCallback (KERNEL.562)
1888 * AllocSLThunkletCallback_dup (KERNEL.605)
1889 */
1890 SEGPTR WINAPI AllocSLThunkletCallback16( FARPROC target, DWORD relay )
1891 {
1892 return AllocSLThunkletCallbackEx16( target, relay, GetCurrentTask() );
1893 }
1894
1895 /***********************************************************************
1896 * FindLSThunkletCallback (KERNEL.563)
1897 * FindLSThunkletCallback_dup (KERNEL.609)
1898 */
1899 FARPROC WINAPI FindLSThunkletCallback( SEGPTR target, DWORD relay )
1900 {
1901 THUNKLET *thunk = MapSL( target );
1902 if ( thunk && IsSLThunklet16( thunk ) && thunk->relay == relay
1903 && thunk->glue == (DWORD)ThunkletCallbackGlueSL )
1904 return (FARPROC)thunk->target;
1905
1906 thunk = THUNK_FindThunklet( (DWORD)target, relay,
1907 (DWORD)ThunkletCallbackGlueLS,
1908 THUNKLET_TYPE_LS );
1909 return (FARPROC)thunk;
1910 }
1911
1912 /***********************************************************************
1913 * FindSLThunkletCallback (KERNEL.564)
1914 * FindSLThunkletCallback_dup (KERNEL.610)
1915 */
1916 SEGPTR WINAPI FindSLThunkletCallback( FARPROC target, DWORD relay )
1917 {
1918 THUNKLET *thunk = (THUNKLET *)target;
1919 if ( thunk && IsLSThunklet( thunk ) && thunk->relay == relay
1920 && thunk->glue == (DWORD)ThunkletCallbackGlueLS - (DWORD)&thunk->type )
1921 return (SEGPTR)thunk->target;
1922
1923 thunk = THUNK_FindThunklet( (DWORD)target, relay,
1924 (DWORD)ThunkletCallbackGlueSL,
1925 THUNKLET_TYPE_SL );
1926 return get_segptr( thunk );
1927 }
1928
1929
1930 /***********************************************************************
1931 * FreeThunklet (KERNEL.611)
1932 */
1933 BOOL16 WINAPI FreeThunklet16( DWORD unused1, DWORD unused2 )
1934 {
1935 return FALSE;
1936 }
1937
1938
1939 /***********************************************************************
1940 * Callback Client API
1941 */
1942
1943 #define N_CBC_FIXED 20
1944 #define N_CBC_VARIABLE 10
1945 #define N_CBC_TOTAL (N_CBC_FIXED + N_CBC_VARIABLE)
1946
1947 static SEGPTR CBClientRelay16[ N_CBC_TOTAL ];
1948 static FARPROC *CBClientRelay32[ N_CBC_TOTAL ];
1949
1950 /***********************************************************************
1951 * RegisterCBClient (KERNEL.619)
1952 */
1953 INT16 WINAPI RegisterCBClient16( INT16 wCBCId,
1954 SEGPTR relay16, FARPROC *relay32 )
1955 {
1956 /* Search for free Callback ID */
1957 if ( wCBCId == -1 )
1958 for ( wCBCId = N_CBC_FIXED; wCBCId < N_CBC_TOTAL; wCBCId++ )
1959 if ( !CBClientRelay16[ wCBCId ] )
1960 break;
1961
1962 /* Register Callback ID */
1963 if ( wCBCId > 0 && wCBCId < N_CBC_TOTAL )
1964 {
1965 CBClientRelay16[ wCBCId ] = relay16;
1966 CBClientRelay32[ wCBCId ] = relay32;
1967 }
1968 else
1969 wCBCId = 0;
1970
1971 return wCBCId;
1972 }
1973
1974 /***********************************************************************
1975 * UnRegisterCBClient (KERNEL.622)
1976 */
1977 INT16 WINAPI UnRegisterCBClient16( INT16 wCBCId,
1978 SEGPTR relay16, FARPROC *relay32 )
1979 {
1980 if ( wCBCId >= N_CBC_FIXED && wCBCId < N_CBC_TOTAL
1981 && CBClientRelay16[ wCBCId ] == relay16
1982 && CBClientRelay32[ wCBCId ] == relay32 )
1983 {
1984 CBClientRelay16[ wCBCId ] = 0;
1985 CBClientRelay32[ wCBCId ] = 0;
1986 }
1987 else
1988 wCBCId = 0;
1989
1990 return wCBCId;
1991 }
1992
1993
1994 /***********************************************************************
1995 * InitCBClient (KERNEL.623)
1996 */
1997 void WINAPI InitCBClient16( FARPROC glueLS )
1998 {
1999 HMODULE16 kernel = GetModuleHandle16( "KERNEL" );
2000 SEGPTR glueSL = (SEGPTR)GetProcAddress16( kernel, (LPCSTR)604 );
2001
2002 SetThunkletCallbackGlue16( glueLS, glueSL );
2003 }
2004
2005 /***********************************************************************
2006 * CBClientGlueSL (KERNEL.604)
2007 */
2008 void WINAPI CBClientGlueSL( CONTEXT86 *context )
2009 {
2010 /* Create stack frame */
2011 SEGPTR stackSeg = stack16_push( 12 );
2012 LPWORD stackLin = MapSL( stackSeg );
2013 SEGPTR glue, *glueTab;
2014
2015 stackLin[3] = (WORD)context->Ebp;
2016 stackLin[2] = (WORD)context->Esi;
2017 stackLin[1] = (WORD)context->Edi;
2018 stackLin[0] = (WORD)context->SegDs;
2019
2020 context->Ebp = OFFSETOF( stackSeg ) + 6;
2021 context->Esp = OFFSETOF( stackSeg ) - 4;
2022 context->SegGs = 0;
2023
2024 /* Jump to 16-bit relay code */
2025 glueTab = MapSL( CBClientRelay16[ stackLin[5] ] );
2026 glue = glueTab[ stackLin[4] ];
2027 context->SegCs = SELECTOROF( glue );
2028 context->Eip = OFFSETOF ( glue );
2029 }
2030
2031 /***********************************************************************
2032 * CBClientThunkSL (KERNEL.620)
2033 */
2034 extern DWORD CALL32_CBClient( FARPROC proc, LPWORD args, WORD *stackLin, DWORD *esi );
2035 void WINAPI CBClientThunkSL( CONTEXT86 *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
2042 /* fill temporary area for the asm code (see comments in winebuild) */
2043 SEGPTR stack = stack16_push( 12 );
2044 LPWORD stackLin = MapSL(stack);
2045 /* stackLin[0] and stackLin[1] reserved for the 32-bit stack ptr */
2046 stackLin[2] = wine_get_ss();
2047 stackLin[3] = 0;
2048 stackLin[4] = OFFSETOF(stack) + 12;
2049 stackLin[5] = SELECTOROF(stack);
2050 stackLin[6] = OFFSETOF(CALL32_CBClientEx_RetAddr); /* overwrite return address */
2051 stackLin[7] = SELECTOROF(CALL32_CBClientEx_RetAddr);
2052 context->Eax = CALL32_CBClient( proc, args, stackLin + 4, &context->Esi );
2053 stack16_pop( 12 );
2054 }
2055
2056 /***********************************************************************
2057 * CBClientThunkSLEx (KERNEL.621)
2058 */
2059 extern DWORD CALL32_CBClientEx( FARPROC proc, LPWORD args, WORD *stackLin, DWORD *esi, INT *nArgs );
2060 void WINAPI CBClientThunkSLEx( CONTEXT86 *context )
2061 {
2062 /* Call 32-bit relay code */
2063
2064 LPWORD args = MapSL( MAKESEGPTR( context->SegSs, LOWORD(context->Ebp) ) );
2065 FARPROC proc = CBClientRelay32[ args[2] ][ args[1] ];
2066 INT nArgs;
2067 LPWORD stackLin;
2068
2069 /* fill temporary area for the asm code (see comments in winebuild) */
2070 SEGPTR stack = stack16_push( 24 );
2071 stackLin = MapSL(stack);
2072 stackLin[0] = OFFSETOF(stack) + 4;
2073 stackLin[1] = SELECTOROF(stack);
2074 stackLin[2] = wine_get_ds();
2075 stackLin[5] = OFFSETOF(stack) + 24;
2076 /* stackLin[6] and stackLin[7] reserved for the 32-bit stack ptr */
2077 stackLin[8] = wine_get_ss();
2078 stackLin[9] = 0;
2079 stackLin[10] = OFFSETOF(CALL32_CBClientEx_RetAddr);
2080 stackLin[11] = SELECTOROF(CALL32_CBClientEx_RetAddr);
2081
2082 context->Eax = CALL32_CBClientEx( proc, args, stackLin, &context->Esi, &nArgs );
2083 stack16_pop( 24 );
2084
2085 /* Restore registers saved by CBClientGlueSL */
2086 stackLin = (LPWORD)((LPBYTE)CURRENT_STACK16 + sizeof(STACK16FRAME) - 4);
2087 context->Ebp = (context->Ebp & ~0xffff) | stackLin[3];
2088 context->Esi = (context->Esi & ~0xffff) | stackLin[2];
2089 context->Edi = (context->Edi & ~0xffff) | stackLin[1];
2090 context->SegDs = stackLin[0];
2091 context->Esp += 16+nArgs;
2092
2093 /* Return to caller of CBClient thunklet */
2094 context->SegCs = stackLin[9];
2095 context->Eip = stackLin[8];
2096 }
2097
2098
2099 /***********************************************************************
2100 * Get16DLLAddress (KERNEL32.@)
2101 *
2102 * This function is used by a Win32s DLL if it wants to call a Win16 function.
2103 * A 16:16 segmented pointer to the function is returned.
2104 * Written without any docu.
2105 */
2106 SEGPTR WINAPI Get16DLLAddress(HMODULE16 handle, LPSTR func_name)
2107 {
2108 static WORD code_sel32;
2109 FARPROC16 proc_16;
2110 LPBYTE thunk;
2111
2112 if (!code_sel32)
2113 {
2114 if (!ThunkletHeap) THUNK_Init();
2115 code_sel32 = SELECTOR_AllocBlock( ThunkletHeap, 0x10000,
2116 WINE_LDT_FLAGS_CODE | WINE_LDT_FLAGS_32BIT );
2117 if (!code_sel32) return 0;
2118 }
2119 if (!(thunk = HeapAlloc( ThunkletHeap, 0, 32 ))) return 0;
2120
2121 if (!handle) handle = GetModuleHandle16("WIN32S16");
2122 proc_16 = GetProcAddress16(handle, func_name);
2123
2124 /* movl proc_16, $edx */
2125 *thunk++ = 0xba;
2126 *(FARPROC16 *)thunk = proc_16;
2127 thunk += sizeof(FARPROC16);
2128
2129 /* jmpl QT_Thunk */
2130 *thunk++ = 0xea;
2131 *(FARPROC *)thunk = GetProcAddress(kernel32_handle,"QT_Thunk");
2132 thunk += sizeof(FARPROC16);
2133 *(WORD *)thunk = wine_get_cs();
2134
2135 return MAKESEGPTR( code_sel32, (char *)thunk - (char *)ThunkletHeap );
2136 }
2137
2138
2139 /***********************************************************************
2140 * GetWin16DOSEnv (KERNEL32.34)
2141 * Returns some internal value.... probably the default environment database?
2142 */
2143 DWORD WINAPI GetWin16DOSEnv(void)
2144 {
2145 FIXME("stub, returning 0\n");
2146 return 0;
2147 }
2148
2149 /**********************************************************************
2150 * GetPK16SysVar (KERNEL32.92)
2151 */
2152 LPVOID WINAPI GetPK16SysVar(void)
2153 {
2154 static BYTE PK16SysVar[128];
2155
2156 FIXME("()\n");
2157 return PK16SysVar;
2158 }
2159
2160 /**********************************************************************
2161 * CommonUnimpStub (KERNEL32.17)
2162 */
2163 void WINAPI __regs_CommonUnimpStub( CONTEXT86 *context )
2164 {
2165 FIXME("generic stub: %s\n", ((LPSTR)context->Eax ? (LPSTR)context->Eax : "?"));
2166
2167 switch ((context->Ecx >> 4) & 0x0f)
2168 {
2169 case 15: context->Eax = -1; break;
2170 case 14: context->Eax = 0x78; break;
2171 case 13: context->Eax = 0x32; break;
2172 case 1: context->Eax = 1; break;
2173 default: context->Eax = 0; break;
2174 }
2175
2176 context->Esp += (context->Ecx & 0x0f) * 4;
2177 }
2178 DEFINE_REGS_ENTRYPOINT( CommonUnimpStub, 0 )
2179
2180 /**********************************************************************
2181 * HouseCleanLogicallyDeadHandles (KERNEL32.33)
2182 */
2183 void WINAPI HouseCleanLogicallyDeadHandles(void)
2184 {
2185 /* Whatever this is supposed to do, our handles probably
2186 don't need it :-) */
2187 }
2188
2189 /**********************************************************************
2190 * @ (KERNEL32.100)
2191 */
2192 BOOL WINAPI _KERNEL32_100(HANDLE threadid,DWORD exitcode,DWORD x)
2193 {
2194 FIXME("(%p,%d,0x%08x): stub\n",threadid,exitcode,x);
2195 return TRUE;
2196 }
2197
2198 /**********************************************************************
2199 * @ (KERNEL32.99)
2200 *
2201 * Checks whether the clock has to be switched from daylight
2202 * savings time to standard time or vice versa.
2203 *
2204 */
2205 DWORD WINAPI _KERNEL32_99(DWORD x)
2206 {
2207 FIXME("(0x%08x): stub\n",x);
2208 return 1;
2209 }
2210
2211
2212 /**********************************************************************
2213 * Catch (KERNEL.55)
2214 *
2215 * Real prototype is:
2216 * INT16 WINAPI Catch( LPCATCHBUF lpbuf );
2217 */
2218 void WINAPI Catch16( LPCATCHBUF lpbuf, CONTEXT86 *context )
2219 {
2220 /* Note: we don't save the current ss, as the catch buffer is */
2221 /* only 9 words long. Hopefully no one will have the silly */
2222 /* idea to change the current stack before calling Throw()... */
2223
2224 /* Windows uses:
2225 * lpbuf[0] = ip
2226 * lpbuf[1] = cs
2227 * lpbuf[2] = sp
2228 * lpbuf[3] = bp
2229 * lpbuf[4] = si
2230 * lpbuf[5] = di
2231 * lpbuf[6] = ds
2232 * lpbuf[7] = unused
2233 * lpbuf[8] = ss
2234 */
2235
2236 lpbuf[0] = LOWORD(context->Eip);
2237 lpbuf[1] = context->SegCs;
2238 /* Windows pushes 4 more words before saving sp */
2239 lpbuf[2] = LOWORD(context->Esp) - 4 * sizeof(WORD);
2240 lpbuf[3] = LOWORD(context->Ebp);
2241 lpbuf[4] = LOWORD(context->Esi);
2242 lpbuf[5] = LOWORD(context->Edi);
2243 lpbuf[6] = context->SegDs;
2244 lpbuf[7] = 0;
2245 lpbuf[8] = context->SegSs;
2246 context->Eax &= ~0xffff; /* Return 0 */
2247 }
2248
2249
2250 /**********************************************************************
2251 * Throw (KERNEL.56)
2252 *
2253 * Real prototype is:
2254 * INT16 WINAPI Throw( LPCATCHBUF lpbuf, INT16 retval );
2255 */
2256 void WINAPI Throw16( LPCATCHBUF lpbuf, INT16 retval, CONTEXT86 *context )
2257 {
2258 STACK16FRAME *pFrame;
2259 STACK32FRAME *frame32;
2260
2261 context->Eax = (context->Eax & ~0xffff) | (WORD)retval;
2262
2263 /* Find the frame32 corresponding to the frame16 we are jumping to */
2264 pFrame = CURRENT_STACK16;
2265 frame32 = pFrame->frame32;
2266 while (frame32 && frame32->frame16)
2267 {
2268 if (OFFSETOF(frame32->frame16) < OFFSETOF(NtCurrentTeb()->WOW32Reserved))
2269 break; /* Something strange is going on */
2270 if (OFFSETOF(frame32->frame16) > lpbuf[2])
2271 {
2272 /* We found the right frame */
2273 pFrame->frame32 = frame32;
2274 break;
2275 }
2276 frame32 = ((STACK16FRAME *)MapSL(frame32->frame16))->frame32;
2277 }
2278 RtlUnwind( &pFrame->frame32->frame, NULL, NULL, 0 );
2279
2280 context->Eip = lpbuf[0];
2281 context->SegCs = lpbuf[1];
2282 context->Esp = lpbuf[2] + 4 * sizeof(WORD) - sizeof(WORD) /*extra arg*/;
2283 context->Ebp = lpbuf[3];
2284 context->Esi = lpbuf[4];
2285 context->Edi = lpbuf[5];
2286 context->SegDs = lpbuf[6];
2287
2288 if (lpbuf[8] != context->SegSs)
2289 ERR("Switching stack segment with Throw() not supported; expect crash now\n" );
2290 }
2291
2292
2293 /*
2294 * 16-bit WOW routines (in KERNEL)
2295 */
2296
2297 /**********************************************************************
2298 * GetVDMPointer32W (KERNEL.516)
2299 */
2300 DWORD WINAPI GetVDMPointer32W16( SEGPTR vp, UINT16 fMode )
2301 {
2302 GlobalPageLock16(GlobalHandle16(SELECTOROF(vp)));
2303 return (DWORD)K32WOWGetVDMPointer( vp, 0, (DWORD)fMode );
2304 }
2305
2306 /***********************************************************************
2307 * LoadLibraryEx32W (KERNEL.513)
2308 */
2309 DWORD WINAPI LoadLibraryEx32W16( LPCSTR lpszLibFile, DWORD hFile, DWORD dwFlags )
2310 {
2311 HMODULE hModule;
2312 DWORD mutex_count;
2313 OFSTRUCT ofs;
2314 const char *p;
2315
2316 if (!lpszLibFile)
2317 {
2318 SetLastError(ERROR_INVALID_PARAMETER);
2319 return 0;
2320 }
2321
2322 /* if the file cannot be found, call LoadLibraryExA anyway, since it might be
2323 a builtin module. This case is handled in MODULE_LoadLibraryExA */
2324
2325 if ((p = strrchr( lpszLibFile, '.' )) && !strchr( p, '\\' )) /* got an extension */
2326 {
2327 if (OpenFile16( lpszLibFile, &ofs, OF_EXIST ) != HFILE_ERROR16)
2328 lpszLibFile = ofs.szPathName;
2329 }
2330 else
2331 {
2332 char buffer[MAX_PATH+4];
2333 strcpy( buffer, lpszLibFile );
2334 strcat( buffer, ".dll" );
2335 if (OpenFile16( buffer, &ofs, OF_EXIST ) != HFILE_ERROR16)
2336 lpszLibFile = ofs.szPathName;
2337 }
2338
2339 ReleaseThunkLock( &mutex_count );
2340 hModule = LoadLibraryExA( lpszLibFile, (HANDLE)hFile, dwFlags );
2341 RestoreThunkLock( mutex_count );
2342
2343 return (DWORD)hModule;
2344 }
2345
2346 /***********************************************************************
2347 * GetProcAddress32W (KERNEL.515)
2348 */
2349 DWORD WINAPI GetProcAddress32W16( DWORD hModule, LPCSTR lpszProc )
2350 {
2351 return (DWORD)GetProcAddress( (HMODULE)hModule, lpszProc );
2352 }
2353
2354 /***********************************************************************
2355 * FreeLibrary32W (KERNEL.514)
2356 */
2357 DWORD WINAPI FreeLibrary32W16( DWORD hLibModule )
2358 {
2359 BOOL retv;
2360 DWORD mutex_count;
2361
2362 ReleaseThunkLock( &mutex_count );
2363 retv = FreeLibrary( (HMODULE)hLibModule );
2364 RestoreThunkLock( mutex_count );
2365 return (DWORD)retv;
2366 }
2367
2368
2369 #define CPEX_DEST_STDCALL 0x00000000
2370 #define CPEX_DEST_CDECL 0x80000000
2371
2372 /**********************************************************************
2373 * WOW_CallProc32W
2374 */
2375 static DWORD WOW_CallProc32W16( FARPROC proc32, DWORD nrofargs, DWORD *args )
2376 {
2377 DWORD ret;
2378 DWORD mutex_count;
2379
2380 ReleaseThunkLock( &mutex_count );
2381
2382 /*
2383 * FIXME: If ( nrofargs & CPEX_DEST_CDECL ) != 0, we should call a
2384 * 32-bit CDECL routine ...
2385 */
2386
2387 if (!proc32) ret = 0;
2388 else switch (nrofargs)
2389 {
2390 case 0: ret = proc32();
2391 break;
2392 case 1: ret = proc32(args[0]);
2393 break;
2394 case 2: ret = proc32(args[0],args[1]);
2395 break;
2396 case 3: ret = proc32(args[0],args[1],args[2]);
2397 break;
2398 case 4: ret = proc32(args[0],args[1],args[2],args[3]);
2399 break;
2400 case 5: ret = proc32(args[0],args[1],args[2],args[3],args[4]);
2401 break;
2402 case 6: ret = proc32(args[0],args[1],args[2],args[3],args[4],args[5]);
2403 break;
2404 case 7: ret = proc32(args[0],args[1],args[2],args[3],args[4],args[5],args[6]);
2405 break;
2406 case 8: ret = proc32(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7]);
2407 break;
2408 case 9: ret = proc32(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8]);
2409 break;
2410 case 10:ret = proc32(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8],args[9]);
2411 break;
2412 case 11:ret = proc32(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8],args[9],args[10]);
2413 break;
2414 case 12:ret = proc32(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8],args[9],args[10],args[11]);
2415 break;
2416 case 13:ret = proc32(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8],args[9],args[10],args[11],args[12]);
2417 break;
2418 case 14:ret = proc32(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8],args[9],args[10],args[11],args[12],args[13]);
2419 break;
2420 case 15:ret = proc32(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8],args[9],args[10],args[11],args[12],args[13],args[14]);
2421 break;
2422 default:
2423 /* FIXME: should go up to 32 arguments */
2424 ERR("Unsupported number of arguments %d, please report.\n",nrofargs);
2425 ret = 0;
2426 break;
2427 }
2428
2429 RestoreThunkLock( mutex_count );
2430
2431 TRACE("returns %08x\n",ret);
2432 return ret;
2433 }
2434
2435 /**********************************************************************
2436 * CallProc32W (KERNEL.517)
2437 */
2438 DWORD WINAPIV CallProc32W16( DWORD nrofargs, DWORD argconvmask, FARPROC proc32, VA_LIST16 valist )
2439 {
2440 DWORD args[32];
2441 unsigned int i;
2442
2443 TRACE("(%d,%d,%p args[",nrofargs,argconvmask,proc32);
2444
2445 for (i=0;i<nrofargs;i++)
2446 {
2447 if (argconvmask & (1<<i))
2448 {
2449 SEGPTR ptr = VA_ARG16( valist, SEGPTR );
2450 /* pascal convention, have to reverse the arguments order */
2451 args[nrofargs - i - 1] = (DWORD)MapSL(ptr);
2452 TRACE("%08x(%p),",ptr,MapSL(ptr));
2453 }
2454 else
2455 {
2456 DWORD arg = VA_ARG16( valist, DWORD );
2457 /* pascal convention, have to reverse the arguments order */
2458 args[nrofargs - i - 1] = arg;
2459 TRACE("%d,", arg);
2460 }
2461 }
2462 TRACE("])\n");
2463
2464 /* POP nrofargs DWORD arguments and 3 DWORD parameters */
2465 stack16_pop( (3 + nrofargs) * sizeof(DWORD) );
2466
2467 return WOW_CallProc32W16( proc32, nrofargs, args );
2468 }
2469
2470 /**********************************************************************
2471 * _CallProcEx32W (KERNEL.518)
2472 */
2473 DWORD WINAPIV CallProcEx32W16( DWORD nrofargs, DWORD argconvmask, FARPROC proc32, VA_LIST16 valist )
2474 {
2475 DWORD args[32];
2476 unsigned int i;
2477
2478 TRACE("(%d,%d,%p args[",nrofargs,argconvmask,proc32);
2479
2480 for (i=0;i<nrofargs;i++)
2481 {
2482 if (argconvmask & (1<<i))
2483 {
2484 SEGPTR ptr = VA_ARG16( valist, SEGPTR );
2485 args[i] = (DWORD)MapSL(ptr);
2486 TRACE("%08x(%p),",ptr,MapSL(ptr));
2487 }
2488 else
2489 {
2490 DWORD arg = VA_ARG16( valist, DWORD );
2491 args[i] = arg;
2492 TRACE("%d,", arg);
2493 }
2494 }
2495 TRACE("])\n");
2496 return WOW_CallProc32W16( proc32, nrofargs, args );
2497 }
2498
2499
2500 /**********************************************************************
2501 * WOW16Call (KERNEL.500)
2502 *
2503 * FIXME!!!
2504 *
2505 */
2506 DWORD WINAPIV WOW16Call(WORD x, WORD y, WORD z, VA_LIST16 args)
2507 {
2508 int i;
2509 DWORD calladdr;
2510 FIXME("(0x%04x,0x%04x,%d),calling (",x,y,z);
2511
2512 for (i=0;i<x/2;i++) {
2513 WORD a = VA_ARG16(args,WORD);
2514 DPRINTF("%04x ",a);
2515 }
2516 calladdr = VA_ARG16(args,DWORD);
2517 stack16_pop( 3*sizeof(WORD) + x + sizeof(DWORD) );
2518 DPRINTF(") calling address was 0x%08x\n",calladdr);
2519 return 0;
2520 }
2521
2522 #endif /* __i386__ */
DirectPlay implementation for GSoC