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krnl386: Add a simple wrapper for CommonUnimpStub instead of saving/restoring all...
[wine.git] / dlls / krnl386.exe16 / thunk.c
blob9126125d06fcc4345112a58ca2784944d1150fc4
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 __ASM_STDCALL_FUNC( LogApiThkLSF, 4, "ret $4" )
191
192 /***********************************************************************
193 * LogApiThkSL (KERNEL32.44)
194 *
195 * NOTE: needs to preserve all registers!
196 */
197 __ASM_STDCALL_FUNC( LogApiThkSL, 4, "ret $4" )
198
199 /***********************************************************************
200 * LogCBThkSL (KERNEL32.47)
201 *
202 * NOTE: needs to preserve all registers!
203 */
204 __ASM_STDCALL_FUNC( LogCBThkSL, 4, "ret $4" )
205
206 /***********************************************************************
207 * Generates a FT_Prolog call.
208 *
209 * 0FB6D1 movzbl edx,cl
210 * 8B1495xxxxxxxx mov edx,[4*edx + targetTable]
211 * 68xxxxxxxx push FT_Prolog
212 * C3 lret
213 */
214 static void _write_ftprolog(LPBYTE relayCode ,DWORD *targetTable) {
215 LPBYTE x;
216
217 x = relayCode;
218 *x++ = 0x0f;*x++=0xb6;*x++=0xd1; /* movzbl edx,cl */
219 *x++ = 0x8B;*x++=0x14;*x++=0x95;*(DWORD**)x= targetTable;
220 x+=4; /* mov edx, [4*edx + targetTable] */
221 *x++ = 0x68; *(void **)x = FT_Prolog;
222 x+=4; /* push FT_Prolog */
223 *x++ = 0xC3; /* lret */
224 /* fill rest with 0xCC / int 3 */
225 }
226
227 /***********************************************************************
228 * _write_qtthunk (internal)
229 * Generates a QT_Thunk style call.
230 *
231 * 33C9 xor ecx, ecx
232 * 8A4DFC mov cl , [ebp-04]
233 * 8B148Dxxxxxxxx mov edx, [4*ecx + targetTable]
234 * B8yyyyyyyy mov eax, QT_Thunk
235 * FFE0 jmp eax
236 */
237 static void _write_qtthunk(
238 LPBYTE relayCode, /* [in] start of QT_Thunk stub */
239 DWORD *targetTable /* [in] start of thunk (for index lookup) */
240 ) {
241 LPBYTE x;
242
243 x = relayCode;
244 *x++ = 0x33;*x++=0xC9; /* xor ecx,ecx */
245 *x++ = 0x8A;*x++=0x4D;*x++=0xFC; /* movb cl,[ebp-04] */
246 *x++ = 0x8B;*x++=0x14;*x++=0x8D;*(DWORD**)x= targetTable;
247 x+=4; /* mov edx, [4*ecx + targetTable */
248 *x++ = 0xB8; *(void **)x = QT_Thunk;
249 x+=4; /* mov eax , QT_Thunk */
250 *x++ = 0xFF; *x++ = 0xE0; /* jmp eax */
251 /* should fill the rest of the 32 bytes with 0xCC */
252 }
253
254 /***********************************************************************
255 * _loadthunk
256 */
257 static LPVOID _loadthunk(LPCSTR module, LPCSTR func, LPCSTR module32,
258 struct ThunkDataCommon *TD32, DWORD checksum)
259 {
260 struct ThunkDataCommon *TD16;
261 HMODULE16 hmod;
262 int ordinal;
263 static BOOL done;
264
265 if (!done)
266 {
267 LoadLibrary16( "gdi.exe" );
268 LoadLibrary16( "user.exe" );
269 done = TRUE;
270 }
271
272 if ((hmod = LoadLibrary16(module)) <= 32)
273 {
274 ERR("(%s, %s, %s): Unable to load '%s', error %d\n",
275 module, func, module32, module, hmod);
276 return 0;
277 }
278
279 if ( !(ordinal = NE_GetOrdinal(hmod, func))
280 || !(TD16 = MapSL((SEGPTR)NE_GetEntryPointEx(hmod, ordinal, FALSE))))
281 {
282 ERR("Unable to find thunk data '%s' in %s, required by %s (conflicting/incorrect DLL versions !?).\n",
283 func, module, module32);
284 return 0;
285 }
286
287 if (TD32 && memcmp(TD16->magic, TD32->magic, 4))
288 {
289 ERR("(%s, %s, %s): Bad magic %c%c%c%c (should be %c%c%c%c)\n",
290 module, func, module32,
291 TD16->magic[0], TD16->magic[1], TD16->magic[2], TD16->magic[3],
292 TD32->magic[0], TD32->magic[1], TD32->magic[2], TD32->magic[3]);
293 return 0;
294 }
295
296 if (TD32 && TD16->checksum != TD32->checksum)
297 {
298 ERR("(%s, %s, %s): Wrong checksum %08x (should be %08x)\n",
299 module, func, module32, TD16->checksum, TD32->checksum);
300 return 0;
301 }
302
303 if (!TD32 && checksum && checksum != *(LPDWORD)TD16)
304 {
305 ERR("(%s, %s, %s): Wrong checksum %08x (should be %08x)\n",
306 module, func, module32, *(LPDWORD)TD16, checksum);
307 return 0;
308 }
309
310 return TD16;
311 }
312
313 /***********************************************************************
314 * GetThunkStuff (KERNEL32.53)
315 */
316 LPVOID WINAPI GetThunkStuff(LPCSTR module, LPCSTR func)
317 {
318 return _loadthunk(module, func, "<kernel>", NULL, 0L);
319 }
320
321 /***********************************************************************
322 * GetThunkBuff (KERNEL32.52)
323 * Returns a pointer to ThkBuf in the 16bit library SYSTHUNK.DLL.
324 */
325 LPVOID WINAPI GetThunkBuff(void)
326 {
327 return GetThunkStuff("SYSTHUNK.DLL", "ThkBuf");
328 }
329
330 /***********************************************************************
331 * ThunkConnect32 (KERNEL32.@)
332 * Connects a 32bit and a 16bit thunkbuffer.
333 */
334 UINT WINAPI ThunkConnect32(
335 struct ThunkDataCommon *TD, /* [in/out] thunkbuffer */
336 LPSTR thunkfun16, /* [in] win16 thunkfunction */
337 LPSTR module16, /* [in] name of win16 dll */
338 LPSTR module32, /* [in] name of win32 dll */
339 HMODULE hmod32, /* [in] hmodule of win32 dll */
340 DWORD dwReason /* [in] initialisation argument */
341 ) {
342 BOOL directionSL;
343
344 if (!strncmp(TD->magic, "SL01", 4))
345 {
346 directionSL = TRUE;
347
348 TRACE("SL01 thunk %s (%p) <- %s (%s), Reason: %d\n",
349 module32, TD, module16, thunkfun16, dwReason);
350 }
351 else if (!strncmp(TD->magic, "LS01", 4))
352 {
353 directionSL = FALSE;
354
355 TRACE("LS01 thunk %s (%p) -> %s (%s), Reason: %d\n",
356 module32, TD, module16, thunkfun16, dwReason);
357 }
358 else
359 {
360 ERR("Invalid magic %c%c%c%c\n",
361 TD->magic[0], TD->magic[1], TD->magic[2], TD->magic[3]);
362 return 0;
363 }
364
365 switch (dwReason)
366 {
367 case DLL_PROCESS_ATTACH:
368 {
369 struct ThunkDataCommon *TD16;
370 if (!(TD16 = _loadthunk(module16, thunkfun16, module32, TD, 0L)))
371 return 0;
372
373 if (directionSL)
374 {
375 struct ThunkDataSL32 *SL32 = (struct ThunkDataSL32 *)TD;
376 struct ThunkDataSL16 *SL16 = (struct ThunkDataSL16 *)TD16;
377 struct SLTargetDB *tdb;
378
379 if (SL16->fpData == NULL)
380 {
381 ERR("ThunkConnect16 was not called!\n");
382 return 0;
383 }
384
385 SL32->data = SL16->fpData;
386
387 tdb = HeapAlloc(GetProcessHeap(), 0, sizeof(*tdb));
388 tdb->process = GetCurrentProcessId();
389 tdb->targetTable = (DWORD *)(thunkfun16 + SL32->offsetTargetTable);
390
391 tdb->next = SL32->data->targetDB; /* FIXME: not thread-safe! */
392 SL32->data->targetDB = tdb;
393
394 TRACE("Process %08x allocated TargetDB entry for ThunkDataSL %p\n",
395 GetCurrentProcessId(), SL32->data);
396 }
397 else
398 {
399 struct ThunkDataLS32 *LS32 = (struct ThunkDataLS32 *)TD;
400 struct ThunkDataLS16 *LS16 = (struct ThunkDataLS16 *)TD16;
401
402 LS32->targetTable = MapSL(LS16->targetTable);
403
404 /* write QT_Thunk and FT_Prolog stubs */
405 _write_qtthunk ((LPBYTE)TD + LS32->offsetQTThunk, LS32->targetTable);
406 _write_ftprolog((LPBYTE)TD + LS32->offsetFTProlog, LS32->targetTable);
407 }
408 break;
409 }
410
411 case DLL_PROCESS_DETACH:
412 /* FIXME: cleanup */
413 break;
414 }
415
416 return 1;
417 }
418
419 /**********************************************************************
420 * QT_Thunk (KERNEL32.@)
421 *
422 * The target address is in EDX.
423 * The 16bit arguments start at ESP.
424 * The number of 16bit argument bytes is EBP-ESP-0x40 (64 Byte thunksetup).
425 * So the stack layout is 16bit argument bytes and then the 64 byte
426 * scratch buffer.
427 * The scratch buffer is used as work space by Windows' QT_Thunk
428 * function.
429 * As the programs unfortunately don't always provide a fixed size
430 * scratch buffer (danger, stack corruption ahead !!), we simply resort
431 * to copying over the whole EBP-ESP range to the 16bit stack
432 * (as there's no way to safely figure out the param count
433 * due to this misbehaviour of some programs).
434 * [ok]
435 *
436 * See DDJ article 9614c for a very good description of QT_Thunk (also
437 * available online !).
438 *
439 * FIXME: DDJ talks of certain register usage rules; I'm not sure
440 * whether we cover this 100%.
441 */
442 void WINAPI __regs_QT_Thunk( CONTEXT *context )
443 {
444 CONTEXT context16;
445 DWORD argsize;
446
447 context16 = *context;
448
449 context16.SegFs = wine_get_fs();
450 context16.SegGs = wine_get_gs();
451 context16.SegCs = HIWORD(context->Edx);
452 context16.Eip = LOWORD(context->Edx);
453 /* point EBP to the STACK16FRAME on the stack
454 * for the call_to_16 to set up the register content on calling */
455 context16.Ebp = OFFSETOF(NtCurrentTeb()->WOW32Reserved) + FIELD_OFFSET(STACK16FRAME,bp);
456
457 /*
458 * used to be (problematic):
459 * argsize = context->Ebp - context->Esp - 0x40;
460 * due to some programs abusing the API, we better assume the full
461 * EBP - ESP range for copying instead: */
462 argsize = context->Ebp - context->Esp;
463
464 /* ok, too much is insane; let's limit param count a bit again */
465 if (argsize > 64)
466 argsize = 64; /* 32 WORDs */
467
468 WOWCallback16Ex( 0, WCB16_REGS, argsize, (void *)context->Esp, (DWORD *)&context16 );
469 context->Eax = context16.Eax;
470 context->Edx = context16.Edx;
471 context->Ecx = context16.Ecx;
472
473 /* make sure to update the Win32 ESP, too, in order to throw away
474 * the number of parameters that the Win16 function
475 * accepted (that it popped from the corresponding Win16 stack) */
476 context->Esp += LOWORD(context16.Esp) -
477 ( OFFSETOF(NtCurrentTeb()->WOW32Reserved) - argsize );
478 }
479 DEFINE_REGS_ENTRYPOINT( QT_Thunk, 0 )
480
481
482 /**********************************************************************
483 * FT_Prolog (KERNEL32.@)
484 *
485 * The set of FT_... thunk routines is used instead of QT_Thunk,
486 * if structures have to be converted from 32-bit to 16-bit
487 * (change of member alignment, conversion of members).
488 *
489 * The thunk function (as created by the thunk compiler) calls
490 * FT_Prolog at the beginning, to set up a stack frame and
491 * allocate a 64 byte buffer on the stack.
492 * The input parameters (target address and some flags) are
493 * saved for later use by FT_Thunk.
494 *
495 * Input: EDX 16-bit target address (SEGPTR)
496 * CX bits 0..7 target number (in target table)
497 * bits 8..9 some flags (unclear???)
498 * bits 10..15 number of DWORD arguments
499 *
500 * Output: A new stackframe is created, and a 64 byte buffer
501 * allocated on the stack. The layout of the stack
502 * on return is as follows:
503 *
504 * (ebp+4) return address to caller of thunk function
505 * (ebp) old EBP
506 * (ebp-4) saved EBX register of caller
507 * (ebp-8) saved ESI register of caller
508 * (ebp-12) saved EDI register of caller
509 * (ebp-16) saved ECX register, containing flags
510 * (ebp-20) bitmap containing parameters that are to be converted
511 * by FT_Thunk; it is initialized to 0 by FT_Prolog and
512 * filled in by the thunk code before calling FT_Thunk
513 * (ebp-24)
514 * ... (unclear)
515 * (ebp-44)
516 * (ebp-48) saved EAX register of caller (unclear, never restored???)
517 * (ebp-52) saved EDX register, containing 16-bit thunk target
518 * (ebp-56)
519 * ... (unclear)
520 * (ebp-64)
521 *
522 * ESP is EBP-64 after return.
523 *
524 */
525 void WINAPI __regs_FT_Prolog( CONTEXT *context )
526 {
527 /* Build stack frame */
528 stack32_push(context, context->Ebp);
529 context->Ebp = context->Esp;
530
531 /* Allocate 64-byte Thunk Buffer */
532 context->Esp -= 64;
533 memset((char *)context->Esp, '\0', 64);
534
535 /* Store Flags (ECX) and Target Address (EDX) */
536 /* Save other registers to be restored later */
537 *(DWORD *)(context->Ebp - 4) = context->Ebx;
538 *(DWORD *)(context->Ebp - 8) = context->Esi;
539 *(DWORD *)(context->Ebp - 12) = context->Edi;
540 *(DWORD *)(context->Ebp - 16) = context->Ecx;
541
542 *(DWORD *)(context->Ebp - 48) = context->Eax;
543 *(DWORD *)(context->Ebp - 52) = context->Edx;
544 }
545 DEFINE_REGS_ENTRYPOINT( FT_Prolog, 0 )
546
547 /**********************************************************************
548 * FT_Thunk (KERNEL32.@)
549 *
550 * This routine performs the actual call to 16-bit code,
551 * similar to QT_Thunk. The differences are:
552 * - The call target is taken from the buffer created by FT_Prolog
553 * - Those arguments requested by the thunk code (by setting the
554 * corresponding bit in the bitmap at EBP-20) are converted
555 * from 32-bit pointers to segmented pointers (those pointers
556 * are guaranteed to point to structures copied to the stack
557 * by the thunk code, so we always use the 16-bit stack selector
558 * for those addresses).
559 *
560 * The bit #i of EBP-20 corresponds here to the DWORD starting at
561 * ESP+4 + 2*i.
562 *
563 * FIXME: It is unclear what happens if there are more than 32 WORDs
564 * of arguments, so that the single DWORD bitmap is no longer
565 * sufficient ...
566 */
567 void WINAPI __regs_FT_Thunk( CONTEXT *context )
568 {
569 DWORD mapESPrelative = *(DWORD *)(context->Ebp - 20);
570 DWORD callTarget = *(DWORD *)(context->Ebp - 52);
571
572 CONTEXT context16;
573 DWORD i, argsize;
574 DWORD newstack[32];
575 LPBYTE oldstack;
576
577 context16 = *context;
578
579 context16.SegFs = wine_get_fs();
580 context16.SegGs = wine_get_gs();
581 context16.SegCs = HIWORD(callTarget);
582 context16.Eip = LOWORD(callTarget);
583 context16.Ebp = OFFSETOF(NtCurrentTeb()->WOW32Reserved) + FIELD_OFFSET(STACK16FRAME,bp);
584
585 argsize = context->Ebp-context->Esp-0x40;
586 if (argsize > sizeof(newstack)) argsize = sizeof(newstack);
587 oldstack = (LPBYTE)context->Esp;
588
589 memcpy( newstack, oldstack, argsize );
590
591 for (i = 0; i < 32; i++) /* NOTE: What about > 32 arguments? */
592 if (mapESPrelative & (1 << i))
593 {
594 SEGPTR *arg = (SEGPTR *)newstack[i];
595 *arg = MAKESEGPTR(SELECTOROF(NtCurrentTeb()->WOW32Reserved),
596 OFFSETOF(NtCurrentTeb()->WOW32Reserved) - argsize
597 + (*(LPBYTE *)arg - oldstack));
598 }
599
600 WOWCallback16Ex( 0, WCB16_REGS, argsize, newstack, (DWORD *)&context16 );
601 context->Eax = context16.Eax;
602 context->Edx = context16.Edx;
603 context->Ecx = context16.Ecx;
604
605 context->Esp += LOWORD(context16.Esp) -
606 ( OFFSETOF(NtCurrentTeb()->WOW32Reserved) - argsize );
607
608 /* Copy modified buffers back to 32-bit stack */
609 memcpy( oldstack, newstack, argsize );
610 }
611 DEFINE_REGS_ENTRYPOINT( FT_Thunk, 0 )
612
613 /***********************************************************************
614 * FT_Exit0 (KERNEL32.@)
615 * FT_Exit4 (KERNEL32.@)
616 * FT_Exit8 (KERNEL32.@)
617 * FT_Exit12 (KERNEL32.@)
618 * FT_Exit16 (KERNEL32.@)
619 * FT_Exit20 (KERNEL32.@)
620 * FT_Exit24 (KERNEL32.@)
621 * FT_Exit28 (KERNEL32.@)
622 * FT_Exit32 (KERNEL32.@)
623 * FT_Exit36 (KERNEL32.@)
624 * FT_Exit40 (KERNEL32.@)
625 * FT_Exit44 (KERNEL32.@)
626 * FT_Exit48 (KERNEL32.@)
627 * FT_Exit52 (KERNEL32.@)
628 * FT_Exit56 (KERNEL32.@)
629 *
630 * One of the FT_ExitNN functions is called at the end of the thunk code.
631 * It removes the stack frame created by FT_Prolog, moves the function
632 * return from EBX to EAX (yes, FT_Thunk did use EAX for the return
633 * value, but the thunk code has moved it from EAX to EBX in the
634 * meantime ... :-), restores the caller's EBX, ESI, and EDI registers,
635 * and perform a return to the CALLER of the thunk code (while removing
636 * the given number of arguments from the caller's stack).
637 */
638 #define FT_EXIT_RESTORE_REGS \
639 "movl %ebx,%eax\n\t" \
640 "movl -4(%ebp),%ebx\n\t" \
641 "movl -8(%ebp),%esi\n\t" \
642 "movl -12(%ebp),%edi\n\t" \
643 "leave\n\t"
644
645 #define DEFINE_FT_Exit(n) \
646 __ASM_STDCALL_FUNC( FT_Exit ## n, 0, FT_EXIT_RESTORE_REGS "ret $" #n )
647
648 DEFINE_FT_Exit(0)
649 DEFINE_FT_Exit(4)
650 DEFINE_FT_Exit(8)
651 DEFINE_FT_Exit(12)
652 DEFINE_FT_Exit(16)
653 DEFINE_FT_Exit(20)
654 DEFINE_FT_Exit(24)
655 DEFINE_FT_Exit(28)
656 DEFINE_FT_Exit(32)
657 DEFINE_FT_Exit(36)
658 DEFINE_FT_Exit(40)
659 DEFINE_FT_Exit(44)
660 DEFINE_FT_Exit(48)
661 DEFINE_FT_Exit(52)
662 DEFINE_FT_Exit(56)
663
664
665 /***********************************************************************
666 * ThunkInitLS (KERNEL32.43)
667 * A thunkbuffer link routine
668 * The thunkbuf looks like:
669 *
670 * 00: DWORD length ? don't know exactly
671 * 04: SEGPTR ptr ? where does it point to?
672 * The pointer ptr is written into the first DWORD of 'thunk'.
673 * (probably correctly implemented)
674 * [ok probably]
675 * RETURNS
676 * segmented pointer to thunk?
677 */
678 DWORD WINAPI ThunkInitLS(
679 LPDWORD thunk, /* [in] win32 thunk */
680 LPCSTR thkbuf, /* [in] thkbuffer name in win16 dll */
681 DWORD len, /* [in] thkbuffer length */
682 LPCSTR dll16, /* [in] name of win16 dll */
683 LPCSTR dll32 /* [in] name of win32 dll (FIXME: not used?) */
684 ) {
685 LPDWORD addr;
686
687 if (!(addr = _loadthunk( dll16, thkbuf, dll32, NULL, len )))
688 return 0;
689
690 if (!addr[1])
691 return 0;
692 *thunk = addr[1];
693
694 return addr[1];
695 }
696
697 /***********************************************************************
698 * Common32ThkLS (KERNEL32.45)
699 *
700 * This is another 32->16 thunk, independent of the QT_Thunk/FT_Thunk
701 * style thunks. The basic difference is that the parameter conversion
702 * is done completely on the *16-bit* side here. Thus we do not call
703 * the 16-bit target directly, but call a common entry point instead.
704 * This entry function then calls the target according to the target
705 * number passed in the DI register.
706 *
707 * Input: EAX SEGPTR to the common 16-bit entry point
708 * CX offset in thunk table (target number * 4)
709 * DX error return value if execution fails (unclear???)
710 * EDX.HI number of DWORD parameters
711 *
712 * (Note that we need to move the thunk table offset from CX to DI !)
713 *
714 * The called 16-bit stub expects its stack to look like this:
715 * ...
716 * (esp+40) 32-bit arguments
717 * ...
718 * (esp+8) 32 byte of stack space available as buffer
719 * (esp) 8 byte return address for use with 0x66 lret
720 *
721 * The called 16-bit stub uses a 0x66 lret to return to 32-bit code,
722 * and uses the EAX register to return a DWORD return value.
723 * Thus we need to use a special assembly glue routine
724 * (CallRegisterLongProc instead of CallRegisterShortProc).
725 *
726 * Finally, we return to the caller, popping the arguments off
727 * the stack. The number of arguments to be popped is returned
728 * in the BL register by the called 16-bit routine.
729 *
730 */
731 void WINAPI __regs_Common32ThkLS( CONTEXT *context )
732 {
733 CONTEXT context16;
734 DWORD argsize;
735
736 context16 = *context;
737
738 context16.SegFs = wine_get_fs();
739 context16.SegGs = wine_get_gs();
740 context16.Edi = LOWORD(context->Ecx);
741 context16.SegCs = HIWORD(context->Eax);
742 context16.Eip = LOWORD(context->Eax);
743 context16.Ebp = OFFSETOF(NtCurrentTeb()->WOW32Reserved) + FIELD_OFFSET(STACK16FRAME,bp);
744
745 argsize = HIWORD(context->Edx) * 4;
746
747 /* FIXME: hack for stupid USER32 CallbackGlueLS routine */
748 if (context->Edx == context->Eip)
749 argsize = 6 * 4;
750
751 /* Note: the first 32 bytes we copy are just garbage from the 32-bit stack, in order to reserve
752 * the space. It is safe to do that since the register function prefix has reserved
753 * a lot more space than that below context->Esp.
754 */
755 WOWCallback16Ex( 0, WCB16_REGS, argsize + 32, (LPBYTE)context->Esp - 32, (DWORD *)&context16 );
756 context->Eax = context16.Eax;
757
758 /* Clean up caller's stack frame */
759 context->Esp += LOBYTE(context16.Ebx);
760 }
761 DEFINE_REGS_ENTRYPOINT( Common32ThkLS, 0 )
762
763 /***********************************************************************
764 * OT_32ThkLSF (KERNEL32.40)
765 *
766 * YET Another 32->16 thunk. The difference to Common32ThkLS is that
767 * argument processing is done on both the 32-bit and the 16-bit side:
768 * The 32-bit side prepares arguments, copying them onto the stack.
769 *
770 * When this routine is called, the first word on the stack is the
771 * number of argument bytes prepared by the 32-bit code, and EDX
772 * contains the 16-bit target address.
773 *
774 * The called 16-bit routine is another relaycode, doing further
775 * argument processing and then calling the real 16-bit target
776 * whose address is stored at [bp-04].
777 *
778 * The call proceeds using a normal CallRegisterShortProc.
779 * After return from the 16-bit relaycode, the arguments need
780 * to be copied *back* to the 32-bit stack, since the 32-bit
781 * relaycode processes output parameters.
782 *
783 * Note that we copy twice the number of arguments, since some of the
784 * 16-bit relaycodes in SYSTHUNK.DLL directly access the original
785 * arguments of the caller!
786 *
787 * (Note that this function seems only to be used for
788 * OLECLI32 -> OLECLI and OLESVR32 -> OLESVR thunking.)
789 */
790 void WINAPI __regs_OT_32ThkLSF( CONTEXT *context )
791 {
792 CONTEXT context16;
793 DWORD argsize;
794
795 context16 = *context;
796
797 context16.SegFs = wine_get_fs();
798 context16.SegGs = wine_get_gs();
799 context16.SegCs = HIWORD(context->Edx);
800 context16.Eip = LOWORD(context->Edx);
801 context16.Ebp = OFFSETOF(NtCurrentTeb()->WOW32Reserved) + FIELD_OFFSET(STACK16FRAME,bp);
802
803 argsize = 2 * *(WORD *)context->Esp + 2;
804
805 WOWCallback16Ex( 0, WCB16_REGS, argsize, (void *)context->Esp, (DWORD *)&context16 );
806 context->Eax = context16.Eax;
807 context->Edx = context16.Edx;
808
809 /* Copy modified buffers back to 32-bit stack */
810 memcpy( (LPBYTE)context->Esp,
811 (LPBYTE)CURRENT_STACK16 - argsize, argsize );
812
813 context->Esp += LOWORD(context16.Esp) -
814 ( OFFSETOF(NtCurrentTeb()->WOW32Reserved) - argsize );
815 }
816 DEFINE_REGS_ENTRYPOINT( OT_32ThkLSF, 0 )
817
818 /***********************************************************************
819 * ThunkInitLSF (KERNEL32.41)
820 * A thunk setup routine.
821 * Expects a pointer to a preinitialized thunkbuffer in the first argument
822 * looking like:
823 *| 00..03: unknown (pointer, check _41, _43, _46)
824 *| 04: EB1E jmp +0x20
825 *|
826 *| 06..23: unknown (space for replacement code, check .90)
827 *|
828 *| 24:>E800000000 call offset 29
829 *| 29:>58 pop eax ( target of call )
830 *| 2A: 2D25000000 sub eax,0x00000025 ( now points to offset 4 )
831 *| 2F: BAxxxxxxxx mov edx,xxxxxxxx
832 *| 34: 68yyyyyyyy push KERNEL32.90
833 *| 39: C3 ret
834 *|
835 *| 3A: EB1E jmp +0x20
836 *| 3E ... 59: unknown (space for replacement code?)
837 *| 5A: E8xxxxxxxx call <32bitoffset xxxxxxxx>
838 *| 5F: 5A pop edx
839 *| 60: 81EA25xxxxxx sub edx, 0x25xxxxxx
840 *| 66: 52 push edx
841 *| 67: 68xxxxxxxx push xxxxxxxx
842 *| 6C: 68yyyyyyyy push KERNEL32.89
843 *| 71: C3 ret
844 *| 72: end?
845 * This function checks if the code is there, and replaces the yyyyyyyy entries
846 * by the functionpointers.
847 * The thunkbuf looks like:
848 *
849 *| 00: DWORD length ? don't know exactly
850 *| 04: SEGPTR ptr ? where does it point to?
851 * The segpointer ptr is written into the first DWORD of 'thunk'.
852 * [ok probably]
853 * RETURNS
854 * unclear, pointer to win16 thkbuffer?
855 */
856 LPVOID WINAPI ThunkInitLSF(
857 LPBYTE thunk, /* [in] win32 thunk */
858 LPCSTR thkbuf, /* [in] thkbuffer name in win16 dll */
859 DWORD len, /* [in] length of thkbuffer */
860 LPCSTR dll16, /* [in] name of win16 dll */
861 LPCSTR dll32 /* [in] name of win32 dll */
862 ) {
863 LPDWORD addr,addr2;
864
865 /* FIXME: add checks for valid code ... */
866 /* write pointers to kernel32.89 and kernel32.90 (+ordinal base of 1) */
867 *(void **)(thunk+0x35) = QT_ThunkPrime;
868 *(void **)(thunk+0x6D) = FT_PrologPrime;
869
870 if (!(addr = _loadthunk( dll16, thkbuf, dll32, NULL, len )))
871 return 0;
872
873 addr2 = MapSL(addr[1]);
874 if (HIWORD(addr2))
875 *(DWORD*)thunk = (DWORD)addr2;
876
877 return addr2;
878 }
879
880 /***********************************************************************
881 * FT_PrologPrime (KERNEL32.89)
882 *
883 * This function is called from the relay code installed by
884 * ThunkInitLSF. It replaces the location from where it was
885 * called by a standard FT_Prolog call stub (which is 'primed'
886 * by inserting the correct target table pointer).
887 * Finally, it calls that stub.
888 *
889 * Input: ECX target number + flags (passed through to FT_Prolog)
890 * (ESP) offset of location where target table pointer
891 * is stored, relative to the start of the relay code
892 * (ESP+4) pointer to start of relay code
893 * (this is where the FT_Prolog call stub gets written to)
894 *
895 * Note: The two DWORD arguments get popped off the stack.
896 *
897 */
898 void WINAPI __regs_FT_PrologPrime( CONTEXT *context )
899 {
900 DWORD targetTableOffset;
901 LPBYTE relayCode;
902
903 /* Compensate for the fact that the Wine register relay code thought
904 we were being called, although we were in fact jumped to */
905 context->Esp -= 4;
906
907 /* Write FT_Prolog call stub */
908 targetTableOffset = stack32_pop(context);
909 relayCode = (LPBYTE)stack32_pop(context);
910 _write_ftprolog( relayCode, *(DWORD **)(relayCode+targetTableOffset) );
911
912 /* Jump to the call stub just created */
913 context->Eip = (DWORD)relayCode;
914 }
915 DEFINE_REGS_ENTRYPOINT( FT_PrologPrime, 0 )
916
917 /***********************************************************************
918 * QT_ThunkPrime (KERNEL32.90)
919 *
920 * This function corresponds to FT_PrologPrime, but installs a
921 * call stub for QT_Thunk instead.
922 *
923 * Input: (EBP-4) target number (passed through to QT_Thunk)
924 * EDX target table pointer location offset
925 * EAX start of relay code
926 *
927 */
928 void WINAPI __regs_QT_ThunkPrime( CONTEXT *context )
929 {
930 DWORD targetTableOffset;
931 LPBYTE relayCode;
932
933 /* Compensate for the fact that the Wine register relay code thought
934 we were being called, although we were in fact jumped to */
935 context->Esp -= 4;
936
937 /* Write QT_Thunk call stub */
938 targetTableOffset = context->Edx;
939 relayCode = (LPBYTE)context->Eax;
940 _write_qtthunk( relayCode, *(DWORD **)(relayCode+targetTableOffset) );
941
942 /* Jump to the call stub just created */
943 context->Eip = (DWORD)relayCode;
944 }
945 DEFINE_REGS_ENTRYPOINT( QT_ThunkPrime, 0 )
946
947 /***********************************************************************
948 * ThunkInitSL (KERNEL32.46)
949 * Another thunkbuf link routine.
950 * The start of the thunkbuf looks like this:
951 * 00: DWORD length
952 * 04: SEGPTR address for thunkbuffer pointer
953 * [ok probably]
954 *
955 * RETURNS
956 * Nothing.
957 */
958 VOID WINAPI ThunkInitSL(
959 LPBYTE thunk, /* [in] start of thunkbuffer */
960 LPCSTR thkbuf, /* [in] name/ordinal of thunkbuffer in win16 dll */
961 DWORD len, /* [in] length of thunkbuffer */
962 LPCSTR dll16, /* [in] name of win16 dll containing the thkbuf */
963 LPCSTR dll32 /* [in] win32 dll. FIXME: strange, unused */
964 ) {
965 LPDWORD addr;
966
967 if (!(addr = _loadthunk( dll16, thkbuf, dll32, NULL, len )))
968 return;
969
970 *(DWORD*)MapSL(addr[1]) = (DWORD)thunk;
971 }
972
973 /**********************************************************************
974 * SSInit (KERNEL.700)
975 * RETURNS
976 * TRUE for success.
977 */
978 BOOL WINAPI SSInit16(void)
979 {
980 return TRUE;
981 }
982
983 /**********************************************************************
984 * SSOnBigStack (KERNEL32.87)
985 * Check if thunking is initialized (ss selector set up etc.)
986 * We do that differently, so just return TRUE.
987 * [ok]
988 * RETURNS
989 * TRUE for success.
990 */
991 BOOL WINAPI SSOnBigStack(void)
992 {
993 TRACE("Yes, thunking is initialized\n");
994 return TRUE;
995 }
996
997 /**********************************************************************
998 * SSConfirmSmallStack (KERNEL.704)
999 *
1000 * Abort if not on small stack.
1001 *
1002 * This must be a register routine as it has to preserve *all* registers.
1003 */
1004 void WINAPI SSConfirmSmallStack( CONTEXT *context )
1005 {
1006 /* We are always on the small stack while in 16-bit code ... */
1007 }
1008
1009 /**********************************************************************
1010 * SSCall (KERNEL32.88)
1011 * One of the real thunking functions. This one seems to be for 32<->32
1012 * thunks. It should probably be capable of crossing processboundaries.
1013 *
1014 * And YES, I've seen nr=48 (somewhere in the Win95 32<->16 OLE coupling)
1015 * [ok]
1016 *
1017 * RETURNS
1018 * Thunked function result.
1019 */
1020 DWORD WINAPIV SSCall(
1021 DWORD nr, /* [in] number of argument bytes */
1022 DWORD flags, /* [in] FIXME: flags ? */
1023 FARPROC fun, /* [in] function to call */
1024 ... /* [in/out] arguments */
1025 ) {
1026 DWORD i,ret;
1027 DWORD *args = ((DWORD *)&fun) + 1;
1028
1029 if(TRACE_ON(thunk))
1030 {
1031 DPRINTF("(%d,0x%08x,%p,[",nr,flags,fun);
1032 for (i=0;i<nr/4;i++)
1033 DPRINTF("0x%08x,",args[i]);
1034 DPRINTF("])\n");
1035 }
1036 ret = call_entry_point( fun, nr / sizeof(DWORD), args );
1037 TRACE(" returning %d ...\n",ret);
1038 return ret;
1039 }
1040
1041 /**********************************************************************
1042 * W32S_BackTo32 (KERNEL32.51)
1043 */
1044 void WINAPI __regs_W32S_BackTo32( CONTEXT *context )
1045 {
1046 LPDWORD stack = (LPDWORD)context->Esp;
1047 FARPROC proc = (FARPROC)context->Eip;
1048
1049 context->Eax = call_entry_point( proc, 10, stack + 1 );
1050 context->Eip = stack32_pop(context);
1051 }
1052 DEFINE_REGS_ENTRYPOINT( W32S_BackTo32, 0 )
1053
1054 /**********************************************************************
1055 * AllocSLCallback (KERNEL32.@)
1056 *
1057 * Allocate a 16->32 callback.
1058 *
1059 * NOTES
1060 * Win95 uses some structchains for callbacks. It allocates them
1061 * in blocks of 100 entries, size 32 bytes each, layout:
1062 * blockstart:
1063 *| 0: PTR nextblockstart
1064 *| 4: entry *first;
1065 *| 8: WORD sel ( start points to blockstart)
1066 *| A: WORD unknown
1067 * 100xentry:
1068 *| 00..17: Code
1069 *| 18: PDB *owning_process;
1070 *| 1C: PTR blockstart
1071 *
1072 * We ignore this for now. (Just a note for further developers)
1073 * FIXME: use this method, so we don't waste selectors...
1074 *
1075 * Following code is then generated by AllocSLCallback. The code is 16 bit, so
1076 * the 0x66 prefix switches from word->long registers.
1077 *
1078 *| 665A pop edx
1079 *| 6668x arg2 x pushl <arg2>
1080 *| 6652 push edx
1081 *| EAx arg1 x jmpf <arg1>
1082 *
1083 * returns the startaddress of this thunk.
1084 *
1085 * Note, that they look very similar to the ones allocates by THUNK_Alloc.
1086 * RETURNS
1087 * A segmented pointer to the start of the thunk
1088 */
1089 DWORD WINAPI
1090 AllocSLCallback(
1091 DWORD finalizer, /* [in] Finalizer function */
1092 DWORD callback /* [in] Callback function */
1093 ) {
1094 LPBYTE x,thunk = HeapAlloc( GetProcessHeap(), 0, 32 );
1095 WORD sel;
1096
1097 x=thunk;
1098 *x++=0x66;*x++=0x5a; /* popl edx */
1099 *x++=0x66;*x++=0x68;*(DWORD*)x=finalizer;x+=4; /* pushl finalizer */
1100 *x++=0x66;*x++=0x52; /* pushl edx */
1101 *x++=0xea;*(DWORD*)x=callback;x+=4; /* jmpf callback */
1102
1103 *(DWORD*)(thunk+18) = GetCurrentProcessId();
1104
1105 sel = SELECTOR_AllocBlock( thunk, 32, WINE_LDT_FLAGS_CODE );
1106 return (sel<<16)|0;
1107 }
1108
1109 /**********************************************************************
1110 * FreeSLCallback (KERNEL32.@)
1111 * Frees the specified 16->32 callback
1112 *
1113 * RETURNS
1114 * Nothing.
1115 */
1116 void WINAPI
1117 FreeSLCallback(
1118 DWORD x /* [in] 16 bit callback (segmented pointer?) */
1119 ) {
1120 FIXME("(0x%08x): stub\n",x);
1121 }
1122
1123 /**********************************************************************
1124 * AllocMappedBuffer (KERNEL32.38)
1125 *
1126 * This is an undocumented KERNEL32 function that
1127 * SMapLS's a GlobalAlloc'ed buffer.
1128 *
1129 * RETURNS
1130 * EDI register: pointer to buffer
1131 *
1132 * NOTES
1133 * The buffer is preceded by 8 bytes:
1134 * ...
1135 * edi+0 buffer
1136 * edi-4 SEGPTR to buffer
1137 * edi-8 some magic Win95 needs for SUnMapLS
1138 * (we use it for the memory handle)
1139 *
1140 * The SEGPTR is used by the caller!
1141 */
1142 void WINAPI __regs_AllocMappedBuffer(
1143 CONTEXT *context /* [in] EDI register: size of buffer to allocate */
1144 ) {
1145 HGLOBAL handle = GlobalAlloc(0, context->Edi + 8);
1146 DWORD *buffer = GlobalLock(handle);
1147 DWORD ptr = 0;
1148
1149 if (buffer)
1150 if (!(ptr = MapLS(buffer + 2)))
1151 {
1152 GlobalUnlock(handle);
1153 GlobalFree(handle);
1154 }
1155
1156 if (!ptr)
1157 context->Eax = context->Edi = 0;
1158 else
1159 {
1160 buffer[0] = (DWORD)handle;
1161 buffer[1] = ptr;
1162
1163 context->Eax = ptr;
1164 context->Edi = (DWORD)(buffer + 2);
1165 }
1166 }
1167 DEFINE_REGS_ENTRYPOINT( AllocMappedBuffer, 0 )
1168
1169 /**********************************************************************
1170 * FreeMappedBuffer (KERNEL32.39)
1171 *
1172 * Free a buffer allocated by AllocMappedBuffer
1173 *
1174 * RETURNS
1175 * Nothing.
1176 */
1177 void WINAPI __regs_FreeMappedBuffer(
1178 CONTEXT *context /* [in] EDI register: pointer to buffer */
1179 ) {
1180 if (context->Edi)
1181 {
1182 DWORD *buffer = (DWORD *)context->Edi - 2;
1183
1184 UnMapLS(buffer[1]);
1185
1186 GlobalUnlock((HGLOBAL)buffer[0]);
1187 GlobalFree((HGLOBAL)buffer[0]);
1188 }
1189 }
1190 DEFINE_REGS_ENTRYPOINT( FreeMappedBuffer, 0 )
1191
1192 /**********************************************************************
1193 * GetTEBSelectorFS (KERNEL.475)
1194 * Set the 16-bit %fs to the 32-bit %fs (current TEB selector)
1195 */
1196 void WINAPI GetTEBSelectorFS16(void)
1197 {
1198 CURRENT_STACK16->fs = wine_get_fs();
1199 }
1200
1201 /**********************************************************************
1202 * IsPeFormat (KERNEL.431)
1203 *
1204 * Determine if a file is a PE format executable.
1205 *
1206 * RETURNS
1207 * TRUE, if it is.
1208 * FALSE if the file could not be opened or is not a PE file.
1209 *
1210 * NOTES
1211 * If fn is given as NULL then the function expects hf16 to be valid.
1212 */
1213 BOOL16 WINAPI IsPeFormat16(
1214 LPSTR fn, /* [in] Filename to the executable */
1215 HFILE16 hf16) /* [in] An open file handle */
1216 {
1217 BOOL ret = FALSE;
1218 IMAGE_DOS_HEADER mzh;
1219 OFSTRUCT ofs;
1220 DWORD xmagic;
1221
1222 if (fn) hf16 = OpenFile16(fn,&ofs,OF_READ);
1223 if (hf16 == HFILE_ERROR16) return FALSE;
1224 _llseek16(hf16,0,SEEK_SET);
1225 if (sizeof(mzh)!=_lread16(hf16,&mzh,sizeof(mzh))) goto done;
1226 if (mzh.e_magic!=IMAGE_DOS_SIGNATURE) goto done;
1227 _llseek16(hf16,mzh.e_lfanew,SEEK_SET);
1228 if (sizeof(DWORD)!=_lread16(hf16,&xmagic,sizeof(DWORD))) goto done;
1229 ret = (xmagic == IMAGE_NT_SIGNATURE);
1230 done:
1231 _lclose16(hf16);
1232 return ret;
1233 }
1234
1235
1236 /***********************************************************************
1237 * K32Thk1632Prolog (KERNEL32.@)
1238 */
1239 void WINAPI __regs_K32Thk1632Prolog( CONTEXT *context )
1240 {
1241 LPBYTE code = (LPBYTE)context->Eip - 5;
1242
1243 /* Arrrgh! SYSTHUNK.DLL just has to re-implement another method
1244 of 16->32 thunks instead of using one of the standard methods!
1245 This means that SYSTHUNK.DLL itself switches to a 32-bit stack,
1246 and does a far call to the 32-bit code segment of OLECLI32/OLESVR32.
1247 Unfortunately, our CallTo/CallFrom mechanism is therefore completely
1248 bypassed, which means it will crash the next time the 32-bit OLE
1249 code thunks down again to 16-bit (this *will* happen!).
1250
1251 The following hack tries to recognize this situation.
1252 This is possible since the called stubs in OLECLI32/OLESVR32 all
1253 look exactly the same:
1254 00 E8xxxxxxxx call K32Thk1632Prolog
1255 05 FF55FC call [ebp-04]
1256 08 E8xxxxxxxx call K32Thk1632Epilog
1257 0D 66CB retf
1258
1259 If we recognize this situation, we try to simulate the actions
1260 of our CallTo/CallFrom mechanism by copying the 16-bit stack
1261 to our 32-bit stack, creating a proper STACK16FRAME and
1262 updating cur_stack. */
1263
1264 if ( code[5] == 0xFF && code[6] == 0x55 && code[7] == 0xFC
1265 && code[13] == 0x66 && code[14] == 0xCB)
1266 {
1267 DWORD argSize = context->Ebp - context->Esp;
1268 char *stack16 = (char *)context->Esp - 4;
1269 STACK16FRAME *frame16 = (STACK16FRAME *)stack16 - 1;
1270 STACK32FRAME *frame32 = NtCurrentTeb()->WOW32Reserved;
1271 char *stack32 = (char *)frame32 - argSize;
1272 WORD stackSel = SELECTOROF(frame32->frame16);
1273 DWORD stackBase = GetSelectorBase(stackSel);
1274
1275 TRACE("before SYSTHUNK hack: EBP: %08x ESP: %08x cur_stack: %p\n",
1276 context->Ebp, context->Esp, NtCurrentTeb()->WOW32Reserved);
1277
1278 memset(frame16, '\0', sizeof(STACK16FRAME));
1279 frame16->frame32 = frame32;
1280 frame16->ebp = context->Ebp;
1281
1282 memcpy(stack32, stack16, argSize);
1283 NtCurrentTeb()->WOW32Reserved = (void *)MAKESEGPTR(stackSel, (DWORD)frame16 - stackBase);
1284
1285 context->Esp = (DWORD)stack32 + 4;
1286 context->Ebp = context->Esp + argSize;
1287
1288 TRACE("after SYSTHUNK hack: EBP: %08x ESP: %08x cur_stack: %p\n",
1289 context->Ebp, context->Esp, NtCurrentTeb()->WOW32Reserved);
1290 }
1291
1292 /* entry_point is never used again once the entry point has
1293 been called. Thus we re-use it to hold the Win16Lock count */
1294 ReleaseThunkLock(&CURRENT_STACK16->entry_point);
1295 }
1296 DEFINE_REGS_ENTRYPOINT( K32Thk1632Prolog, 0 )
1297
1298 /***********************************************************************
1299 * K32Thk1632Epilog (KERNEL32.@)
1300 */
1301 void WINAPI __regs_K32Thk1632Epilog( CONTEXT *context )
1302 {
1303 LPBYTE code = (LPBYTE)context->Eip - 13;
1304
1305 RestoreThunkLock(CURRENT_STACK16->entry_point);
1306
1307 /* We undo the SYSTHUNK hack if necessary. See K32Thk1632Prolog. */
1308
1309 if ( code[5] == 0xFF && code[6] == 0x55 && code[7] == 0xFC
1310 && code[13] == 0x66 && code[14] == 0xCB)
1311 {
1312 STACK16FRAME *frame16 = MapSL((SEGPTR)NtCurrentTeb()->WOW32Reserved);
1313 char *stack16 = (char *)(frame16 + 1);
1314 DWORD argSize = frame16->ebp - (DWORD)stack16;
1315 char *stack32 = (char *)frame16->frame32 - argSize;
1316
1317 DWORD nArgsPopped = context->Esp - (DWORD)stack32;
1318
1319 TRACE("before SYSTHUNK hack: EBP: %08x ESP: %08x cur_stack: %p\n",
1320 context->Ebp, context->Esp, NtCurrentTeb()->WOW32Reserved);
1321
1322 NtCurrentTeb()->WOW32Reserved = frame16->frame32;
1323
1324 context->Esp = (DWORD)stack16 + nArgsPopped;
1325 context->Ebp = frame16->ebp;
1326
1327 TRACE("after SYSTHUNK hack: EBP: %08x ESP: %08x cur_stack: %p\n",
1328 context->Ebp, context->Esp, NtCurrentTeb()->WOW32Reserved);
1329 }
1330 }
1331 DEFINE_REGS_ENTRYPOINT( K32Thk1632Epilog, 0 )
1332
1333 /*********************************************************************
1334 * PK16FNF [KERNEL32.91]
1335 *
1336 * This routine fills in the supplied 13-byte (8.3 plus terminator)
1337 * string buffer with the 8.3 filename of a recently loaded 16-bit
1338 * module. It is unknown exactly what modules trigger this
1339 * mechanism or what purpose this serves. Win98 Explorer (and
1340 * probably also Win95 with IE 4 shell integration) calls this
1341 * several times during initialization.
1342 *
1343 * FIXME: find out what this really does and make it work.
1344 */
1345 void WINAPI PK16FNF(LPSTR strPtr)
1346 {
1347 FIXME("(%p): stub\n", strPtr);
1348
1349 /* fill in a fake filename that'll be easy to recognize */
1350 strcpy(strPtr, "WINESTUB.FIX");
1351 }
1352
1353 /***********************************************************************
1354 * 16->32 Flat Thunk routines:
1355 */
1356
1357 /***********************************************************************
1358 * ThunkConnect16 (KERNEL.651)
1359 * Connects a 32bit and a 16bit thunkbuffer.
1360 */
1361 UINT WINAPI ThunkConnect16(
1362 LPSTR module16, /* [in] name of win16 dll */
1363 LPSTR module32, /* [in] name of win32 dll */
1364 HINSTANCE16 hInst16, /* [in] hInst of win16 dll */
1365 DWORD dwReason, /* [in] initialisation argument */
1366 struct ThunkDataCommon *TD, /* [in/out] thunkbuffer */
1367 LPSTR thunkfun32, /* [in] win32 thunkfunction */
1368 WORD cs /* [in] CS of win16 dll */
1369 ) {
1370 BOOL directionSL;
1371
1372 if (!strncmp(TD->magic, "SL01", 4))
1373 {
1374 directionSL = TRUE;
1375
1376 TRACE("SL01 thunk %s (%p) -> %s (%s), Reason: %d\n",
1377 module16, TD, module32, thunkfun32, dwReason);
1378 }
1379 else if (!strncmp(TD->magic, "LS01", 4))
1380 {
1381 directionSL = FALSE;
1382
1383 TRACE("LS01 thunk %s (%p) <- %s (%s), Reason: %d\n",
1384 module16, TD, module32, thunkfun32, dwReason);
1385 }
1386 else
1387 {
1388 ERR("Invalid magic %c%c%c%c\n",
1389 TD->magic[0], TD->magic[1], TD->magic[2], TD->magic[3]);
1390 return 0;
1391 }
1392
1393 switch (dwReason)
1394 {
1395 case DLL_PROCESS_ATTACH:
1396 if (directionSL)
1397 {
1398 struct ThunkDataSL16 *SL16 = (struct ThunkDataSL16 *)TD;
1399 struct ThunkDataSL *SL = SL16->fpData;
1400
1401 if (SL == NULL)
1402 {
1403 SL = HeapAlloc(GetProcessHeap(), 0, sizeof(*SL));
1404
1405 SL->common = SL16->common;
1406 SL->flags1 = SL16->flags1;
1407 SL->flags2 = SL16->flags2;
1408
1409 SL->apiDB = MapSL(SL16->apiDatabase);
1410 SL->targetDB = NULL;
1411
1412 lstrcpynA(SL->pszDll16, module16, 255);
1413 lstrcpynA(SL->pszDll32, module32, 255);
1414
1415 /* We should create a SEGPTR to the ThunkDataSL,
1416 but since the contents are not in the original format,
1417 any access to this by 16-bit code would crash anyway. */
1418 SL16->spData = 0;
1419 SL16->fpData = SL;
1420 }
1421
1422
1423 if (SL->flags2 & 0x80000000)
1424 {
1425 TRACE("Preloading 32-bit library\n");
1426 LoadLibraryA(module32);
1427 }
1428 }
1429 else
1430 {
1431 /* nothing to do */
1432 }
1433 break;
1434
1435 case DLL_PROCESS_DETACH:
1436 /* FIXME: cleanup */
1437 break;
1438 }
1439
1440 return 1;
1441 }
1442
1443
1444 /***********************************************************************
1445 * C16ThkSL (KERNEL.630)
1446 */
1447
1448 void WINAPI C16ThkSL(CONTEXT *context)
1449 {
1450 LPBYTE stub = MapSL(context->Eax), x = stub;
1451 WORD cs = wine_get_cs();
1452 WORD ds = wine_get_ds();
1453
1454 /* We produce the following code:
1455 *
1456 * mov ax, __FLATDS
1457 * mov es, ax
1458 * movzx ecx, cx
1459 * mov edx, es:[ecx + $EDX]
1460 * push bp
1461 * push edx
1462 * push dx
1463 * push edx
1464 * call __FLATCS:__wine_call_from_16_thunk
1465 */
1466
1467 *x++ = 0xB8; *(WORD *)x = ds; x += sizeof(WORD);
1468 *x++ = 0x8E; *x++ = 0xC0;
1469 *x++ = 0x66; *x++ = 0x0F; *x++ = 0xB7; *x++ = 0xC9;
1470 *x++ = 0x67; *x++ = 0x66; *x++ = 0x26; *x++ = 0x8B;
1471 *x++ = 0x91; *(DWORD *)x = context->Edx; x += sizeof(DWORD);
1472
1473 *x++ = 0x55;
1474 *x++ = 0x66; *x++ = 0x52;
1475 *x++ = 0x52;
1476 *x++ = 0x66; *x++ = 0x52;
1477 *x++ = 0x66; *x++ = 0x9A;
1478 *(void **)x = __wine_call_from_16_thunk; x += sizeof(void *);
1479 *(WORD *)x = cs; x += sizeof(WORD);
1480
1481 /* Jump to the stub code just created */
1482 context->Eip = LOWORD(context->Eax);
1483 context->SegCs = HIWORD(context->Eax);
1484
1485 /* Since C16ThkSL got called by a jmp, we need to leave the
1486 original return address on the stack */
1487 context->Esp -= 4;
1488 }
1489
1490 /***********************************************************************
1491 * C16ThkSL01 (KERNEL.631)
1492 */
1493
1494 void WINAPI C16ThkSL01(CONTEXT *context)
1495 {
1496 LPBYTE stub = MapSL(context->Eax), x = stub;
1497
1498 if (stub)
1499 {
1500 struct ThunkDataSL16 *SL16 = MapSL(context->Edx);
1501 struct ThunkDataSL *td = SL16->fpData;
1502
1503 DWORD procAddress = (DWORD)GetProcAddress16(GetModuleHandle16("KERNEL"), (LPCSTR)631);
1504 WORD cs = wine_get_cs();
1505
1506 if (!td)
1507 {
1508 ERR("ThunkConnect16 was not called!\n");
1509 return;
1510 }
1511
1512 TRACE("Creating stub for ThunkDataSL %p\n", td);
1513
1514
1515 /* We produce the following code:
1516 *
1517 * xor eax, eax
1518 * mov edx, $td
1519 * call C16ThkSL01
1520 * push bp
1521 * push edx
1522 * push dx
1523 * push edx
1524 * call __FLATCS:__wine_call_from_16_thunk
1525 */
1526
1527 *x++ = 0x66; *x++ = 0x33; *x++ = 0xC0;
1528 *x++ = 0x66; *x++ = 0xBA; *(void **)x = td; x += sizeof(void *);
1529 *x++ = 0x9A; *(DWORD *)x = procAddress; x += sizeof(DWORD);
1530
1531 *x++ = 0x55;
1532 *x++ = 0x66; *x++ = 0x52;
1533 *x++ = 0x52;
1534 *x++ = 0x66; *x++ = 0x52;
1535 *x++ = 0x66; *x++ = 0x9A;
1536 *(void **)x = __wine_call_from_16_thunk; x += sizeof(void *);
1537 *(WORD *)x = cs; x += sizeof(WORD);
1538
1539 /* Jump to the stub code just created */
1540 context->Eip = LOWORD(context->Eax);
1541 context->SegCs = HIWORD(context->Eax);
1542
1543 /* Since C16ThkSL01 got called by a jmp, we need to leave the
1544 original return address on the stack */
1545 context->Esp -= 4;
1546 }
1547 else
1548 {
1549 struct ThunkDataSL *td = (struct ThunkDataSL *)context->Edx;
1550 DWORD targetNr = LOWORD(context->Ecx) / 4;
1551 struct SLTargetDB *tdb;
1552
1553 TRACE("Process %08x calling target %d of ThunkDataSL %p\n",
1554 GetCurrentProcessId(), targetNr, td);
1555
1556 for (tdb = td->targetDB; tdb; tdb = tdb->next)
1557 if (tdb->process == GetCurrentProcessId())
1558 break;
1559
1560 if (!tdb)
1561 {
1562 TRACE("Loading 32-bit library %s\n", td->pszDll32);
1563 LoadLibraryA(td->pszDll32);
1564
1565 for (tdb = td->targetDB; tdb; tdb = tdb->next)
1566 if (tdb->process == GetCurrentProcessId())
1567 break;
1568 }
1569
1570 if (tdb)
1571 {
1572 context->Edx = tdb->targetTable[targetNr];
1573
1574 TRACE("Call target is %08x\n", context->Edx);
1575 }
1576 else
1577 {
1578 WORD *stack = MapSL( MAKESEGPTR(context->SegSs, LOWORD(context->Esp)) );
1579 context->Edx = (context->Edx & ~0xffff) | HIWORD(td->apiDB[targetNr].errorReturnValue);
1580 context->Eax = (context->Eax & ~0xffff) | LOWORD(td->apiDB[targetNr].errorReturnValue);
1581 context->Eip = stack[2];
1582 context->SegCs = stack[3];
1583 context->Esp += td->apiDB[targetNr].nrArgBytes + 4;
1584
1585 ERR("Process %08x did not ThunkConnect32 %s to %s\n",
1586 GetCurrentProcessId(), td->pszDll32, td->pszDll16);
1587 }
1588 }
1589 }
1590
1591
1592 /***********************************************************************
1593 * 16<->32 Thunklet/Callback API:
1594 */
1595
1596 #include "pshpack1.h"
1597 typedef struct _THUNKLET
1598 {
1599 BYTE prefix_target;
1600 BYTE pushl_target;
1601 DWORD target;
1602
1603 BYTE prefix_relay;
1604 BYTE pushl_relay;
1605 DWORD relay;
1606
1607 BYTE jmp_glue;
1608 DWORD glue;
1609
1610 BYTE type;
1611 HINSTANCE16 owner;
1612 struct _THUNKLET *next;
1613 } THUNKLET;
1614 #include "poppack.h"
1615
1616 #define THUNKLET_TYPE_LS 1
1617 #define THUNKLET_TYPE_SL 2
1618
1619 static HANDLE ThunkletHeap = 0;
1620 static WORD ThunkletCodeSel;
1621 static THUNKLET *ThunkletAnchor = NULL;
1622
1623 static FARPROC ThunkletSysthunkGlueLS = 0;
1624 static SEGPTR ThunkletSysthunkGlueSL = 0;
1625
1626 static FARPROC ThunkletCallbackGlueLS = 0;
1627 static SEGPTR ThunkletCallbackGlueSL = 0;
1628
1629
1630 /* map a thunk allocated on ThunkletHeap to a 16-bit pointer */
1631 static inline SEGPTR get_segptr( void *thunk )
1632 {
1633 if (!thunk) return 0;
1634 return MAKESEGPTR( ThunkletCodeSel, (char *)thunk - (char *)ThunkletHeap );
1635 }
1636
1637 /***********************************************************************
1638 * THUNK_Init
1639 */
1640 static BOOL THUNK_Init(void)
1641 {
1642 LPBYTE thunk;
1643
1644 ThunkletHeap = HeapCreate( HEAP_CREATE_ENABLE_EXECUTE, 0x10000, 0x10000 );
1645 if (!ThunkletHeap) return FALSE;
1646
1647 ThunkletCodeSel = SELECTOR_AllocBlock( ThunkletHeap, 0x10000, WINE_LDT_FLAGS_CODE );
1648
1649 thunk = HeapAlloc( ThunkletHeap, 0, 5 );
1650 if (!thunk) return FALSE;
1651
1652 ThunkletSysthunkGlueLS = (FARPROC)thunk;
1653 *thunk++ = 0x58; /* popl eax */
1654 *thunk++ = 0xC3; /* ret */
1655
1656 ThunkletSysthunkGlueSL = get_segptr( thunk );
1657 *thunk++ = 0x66; *thunk++ = 0x58; /* popl eax */
1658 *thunk++ = 0xCB; /* lret */
1659
1660 return TRUE;
1661 }
1662
1663 /***********************************************************************
1664 * SetThunkletCallbackGlue (KERNEL.560)
1665 */
1666 void WINAPI SetThunkletCallbackGlue16( FARPROC glueLS, SEGPTR glueSL )
1667 {
1668 ThunkletCallbackGlueLS = glueLS;
1669 ThunkletCallbackGlueSL = glueSL;
1670 }
1671
1672
1673 /***********************************************************************
1674 * THUNK_FindThunklet
1675 */
1676 static THUNKLET *THUNK_FindThunklet( DWORD target, DWORD relay,
1677 DWORD glue, BYTE type )
1678 {
1679 THUNKLET *thunk;
1680
1681 for (thunk = ThunkletAnchor; thunk; thunk = thunk->next)
1682 if ( thunk->type == type
1683 && thunk->target == target
1684 && thunk->relay == relay
1685 && ( type == THUNKLET_TYPE_LS ?
1686 ( thunk->glue == glue - (DWORD)&thunk->type )
1687 : ( thunk->glue == glue ) ) )
1688 return thunk;
1689
1690 return NULL;
1691 }
1692
1693 /***********************************************************************
1694 * THUNK_AllocLSThunklet
1695 */
1696 static FARPROC THUNK_AllocLSThunklet( SEGPTR target, DWORD relay,
1697 FARPROC glue, HTASK16 owner )
1698 {
1699 THUNKLET *thunk = THUNK_FindThunklet( (DWORD)target, relay, (DWORD)glue,
1700 THUNKLET_TYPE_LS );
1701 if (!thunk)
1702 {
1703 TDB *pTask = GlobalLock16( owner );
1704
1705 if (!ThunkletHeap) THUNK_Init();
1706 if ( !(thunk = HeapAlloc( ThunkletHeap, 0, sizeof(THUNKLET) )) )
1707 return 0;
1708
1709 thunk->prefix_target = thunk->prefix_relay = 0x90;
1710 thunk->pushl_target = thunk->pushl_relay = 0x68;
1711 thunk->jmp_glue = 0xE9;
1712
1713 thunk->target = (DWORD)target;
1714 thunk->relay = relay;
1715 thunk->glue = (DWORD)glue - (DWORD)&thunk->type;
1716
1717 thunk->type = THUNKLET_TYPE_LS;
1718 thunk->owner = pTask? pTask->hInstance : 0;
1719
1720 thunk->next = ThunkletAnchor;
1721 ThunkletAnchor = thunk;
1722 }
1723
1724 return (FARPROC)thunk;
1725 }
1726
1727 /***********************************************************************
1728 * THUNK_AllocSLThunklet
1729 */
1730 static SEGPTR THUNK_AllocSLThunklet( FARPROC target, DWORD relay,
1731 SEGPTR glue, HTASK16 owner )
1732 {
1733 THUNKLET *thunk = THUNK_FindThunklet( (DWORD)target, relay, (DWORD)glue,
1734 THUNKLET_TYPE_SL );
1735 if (!thunk)
1736 {
1737 TDB *pTask = GlobalLock16( owner );
1738
1739 if (!ThunkletHeap) THUNK_Init();
1740 if ( !(thunk = HeapAlloc( ThunkletHeap, 0, sizeof(THUNKLET) )) )
1741 return 0;
1742
1743 thunk->prefix_target = thunk->prefix_relay = 0x66;
1744 thunk->pushl_target = thunk->pushl_relay = 0x68;
1745 thunk->jmp_glue = 0xEA;
1746
1747 thunk->target = (DWORD)target;
1748 thunk->relay = relay;
1749 thunk->glue = (DWORD)glue;
1750
1751 thunk->type = THUNKLET_TYPE_SL;
1752 thunk->owner = pTask? pTask->hInstance : 0;
1753
1754 thunk->next = ThunkletAnchor;
1755 ThunkletAnchor = thunk;
1756 }
1757
1758 return get_segptr( thunk );
1759 }
1760
1761 /**********************************************************************
1762 * IsLSThunklet
1763 */
1764 static BOOL16 IsLSThunklet( THUNKLET *thunk )
1765 {
1766 return thunk->prefix_target == 0x90 && thunk->pushl_target == 0x68
1767 && thunk->prefix_relay == 0x90 && thunk->pushl_relay == 0x68
1768 && thunk->jmp_glue == 0xE9 && thunk->type == THUNKLET_TYPE_LS;
1769 }
1770
1771 /**********************************************************************
1772 * IsSLThunklet (KERNEL.612)
1773 */
1774 BOOL16 WINAPI IsSLThunklet16( THUNKLET *thunk )
1775 {
1776 return thunk->prefix_target == 0x66 && thunk->pushl_target == 0x68
1777 && thunk->prefix_relay == 0x66 && thunk->pushl_relay == 0x68
1778 && thunk->jmp_glue == 0xEA && thunk->type == THUNKLET_TYPE_SL;
1779 }
1780
1781
1782
1783 /***********************************************************************
1784 * AllocLSThunkletSysthunk (KERNEL.607)
1785 */
1786 FARPROC WINAPI AllocLSThunkletSysthunk16( SEGPTR target,
1787 FARPROC relay, DWORD dummy )
1788 {
1789 if (!ThunkletSysthunkGlueLS) THUNK_Init();
1790 return THUNK_AllocLSThunklet( (SEGPTR)relay, (DWORD)target,
1791 ThunkletSysthunkGlueLS, GetCurrentTask() );
1792 }
1793
1794 /***********************************************************************
1795 * AllocSLThunkletSysthunk (KERNEL.608)
1796 */
1797 SEGPTR WINAPI AllocSLThunkletSysthunk16( FARPROC target,
1798 SEGPTR relay, DWORD dummy )
1799 {
1800 if (!ThunkletSysthunkGlueSL) THUNK_Init();
1801 return THUNK_AllocSLThunklet( (FARPROC)relay, (DWORD)target,
1802 ThunkletSysthunkGlueSL, GetCurrentTask() );
1803 }
1804
1805
1806 /***********************************************************************
1807 * AllocLSThunkletCallbackEx (KERNEL.567)
1808 */
1809 FARPROC WINAPI AllocLSThunkletCallbackEx16( SEGPTR target,
1810 DWORD relay, HTASK16 task )
1811 {
1812 THUNKLET *thunk = MapSL( target );
1813 if ( !thunk ) return NULL;
1814
1815 if ( IsSLThunklet16( thunk ) && thunk->relay == relay
1816 && thunk->glue == (DWORD)ThunkletCallbackGlueSL )
1817 return (FARPROC)thunk->target;
1818
1819 return THUNK_AllocLSThunklet( target, relay,
1820 ThunkletCallbackGlueLS, task );
1821 }
1822
1823 /***********************************************************************
1824 * AllocSLThunkletCallbackEx (KERNEL.568)
1825 */
1826 SEGPTR WINAPI AllocSLThunkletCallbackEx16( FARPROC target,
1827 DWORD relay, HTASK16 task )
1828 {
1829 THUNKLET *thunk = (THUNKLET *)target;
1830 if ( !thunk ) return 0;
1831
1832 if ( IsLSThunklet( thunk ) && thunk->relay == relay
1833 && thunk->glue == (DWORD)ThunkletCallbackGlueLS - (DWORD)&thunk->type )
1834 return (SEGPTR)thunk->target;
1835
1836 return THUNK_AllocSLThunklet( target, relay,
1837 ThunkletCallbackGlueSL, task );
1838 }
1839
1840 /***********************************************************************
1841 * AllocLSThunkletCallback (KERNEL.561)
1842 * AllocLSThunkletCallback_dup (KERNEL.606)
1843 */
1844 FARPROC WINAPI AllocLSThunkletCallback16( SEGPTR target, DWORD relay )
1845 {
1846 return AllocLSThunkletCallbackEx16( target, relay, GetCurrentTask() );
1847 }
1848
1849 /***********************************************************************
1850 * AllocSLThunkletCallback (KERNEL.562)
1851 * AllocSLThunkletCallback_dup (KERNEL.605)
1852 */
1853 SEGPTR WINAPI AllocSLThunkletCallback16( FARPROC target, DWORD relay )
1854 {
1855 return AllocSLThunkletCallbackEx16( target, relay, GetCurrentTask() );
1856 }
1857
1858 /***********************************************************************
1859 * FindLSThunkletCallback (KERNEL.563)
1860 * FindLSThunkletCallback_dup (KERNEL.609)
1861 */
1862 FARPROC WINAPI FindLSThunkletCallback( SEGPTR target, DWORD relay )
1863 {
1864 THUNKLET *thunk = MapSL( target );
1865 if ( thunk && IsSLThunklet16( thunk ) && thunk->relay == relay
1866 && thunk->glue == (DWORD)ThunkletCallbackGlueSL )
1867 return (FARPROC)thunk->target;
1868
1869 thunk = THUNK_FindThunklet( (DWORD)target, relay,
1870 (DWORD)ThunkletCallbackGlueLS,
1871 THUNKLET_TYPE_LS );
1872 return (FARPROC)thunk;
1873 }
1874
1875 /***********************************************************************
1876 * FindSLThunkletCallback (KERNEL.564)
1877 * FindSLThunkletCallback_dup (KERNEL.610)
1878 */
1879 SEGPTR WINAPI FindSLThunkletCallback( FARPROC target, DWORD relay )
1880 {
1881 THUNKLET *thunk = (THUNKLET *)target;
1882 if ( thunk && IsLSThunklet( thunk ) && thunk->relay == relay
1883 && thunk->glue == (DWORD)ThunkletCallbackGlueLS - (DWORD)&thunk->type )
1884 return (SEGPTR)thunk->target;
1885
1886 thunk = THUNK_FindThunklet( (DWORD)target, relay,
1887 (DWORD)ThunkletCallbackGlueSL,
1888 THUNKLET_TYPE_SL );
1889 return get_segptr( thunk );
1890 }
1891
1892
1893 /***********************************************************************
1894 * FreeThunklet (KERNEL.611)
1895 */
1896 BOOL16 WINAPI FreeThunklet16( DWORD unused1, DWORD unused2 )
1897 {
1898 return FALSE;
1899 }
1900
1901
1902 /***********************************************************************
1903 * Callback Client API
1904 */
1905
1906 #define N_CBC_FIXED 20
1907 #define N_CBC_VARIABLE 10
1908 #define N_CBC_TOTAL (N_CBC_FIXED + N_CBC_VARIABLE)
1909
1910 static SEGPTR CBClientRelay16[ N_CBC_TOTAL ];
1911 static FARPROC *CBClientRelay32[ N_CBC_TOTAL ];
1912
1913 /***********************************************************************
1914 * RegisterCBClient (KERNEL.619)
1915 */
1916 INT16 WINAPI RegisterCBClient16( INT16 wCBCId,
1917 SEGPTR relay16, FARPROC *relay32 )
1918 {
1919 /* Search for free Callback ID */
1920 if ( wCBCId == -1 )
1921 for ( wCBCId = N_CBC_FIXED; wCBCId < N_CBC_TOTAL; wCBCId++ )
1922 if ( !CBClientRelay16[ wCBCId ] )
1923 break;
1924
1925 /* Register Callback ID */
1926 if ( wCBCId > 0 && wCBCId < N_CBC_TOTAL )
1927 {
1928 CBClientRelay16[ wCBCId ] = relay16;
1929 CBClientRelay32[ wCBCId ] = relay32;
1930 }
1931 else
1932 wCBCId = 0;
1933
1934 return wCBCId;
1935 }
1936
1937 /***********************************************************************
1938 * UnRegisterCBClient (KERNEL.622)
1939 */
1940 INT16 WINAPI UnRegisterCBClient16( INT16 wCBCId,
1941 SEGPTR relay16, FARPROC *relay32 )
1942 {
1943 if ( wCBCId >= N_CBC_FIXED && wCBCId < N_CBC_TOTAL
1944 && CBClientRelay16[ wCBCId ] == relay16
1945 && CBClientRelay32[ wCBCId ] == relay32 )
1946 {
1947 CBClientRelay16[ wCBCId ] = 0;
1948 CBClientRelay32[ wCBCId ] = 0;
1949 }
1950 else
1951 wCBCId = 0;
1952
1953 return wCBCId;
1954 }
1955
1956
1957 /***********************************************************************
1958 * InitCBClient (KERNEL.623)
1959 */
1960 void WINAPI InitCBClient16( FARPROC glueLS )
1961 {
1962 HMODULE16 kernel = GetModuleHandle16( "KERNEL" );
1963 SEGPTR glueSL = (SEGPTR)GetProcAddress16( kernel, (LPCSTR)604 );
1964
1965 SetThunkletCallbackGlue16( glueLS, glueSL );
1966 }
1967
1968 /***********************************************************************
1969 * CBClientGlueSL (KERNEL.604)
1970 */
1971 void WINAPI CBClientGlueSL( CONTEXT *context )
1972 {
1973 /* Create stack frame */
1974 SEGPTR stackSeg = stack16_push( 12 );
1975 LPWORD stackLin = MapSL( stackSeg );
1976 SEGPTR glue, *glueTab;
1977
1978 stackLin[3] = (WORD)context->Ebp;
1979 stackLin[2] = (WORD)context->Esi;
1980 stackLin[1] = (WORD)context->Edi;
1981 stackLin[0] = (WORD)context->SegDs;
1982
1983 context->Ebp = OFFSETOF( stackSeg ) + 6;
1984 context->Esp = OFFSETOF( stackSeg ) - 4;
1985 context->SegGs = 0;
1986
1987 /* Jump to 16-bit relay code */
1988 glueTab = MapSL( CBClientRelay16[ stackLin[5] ] );
1989 glue = glueTab[ stackLin[4] ];
1990 context->SegCs = SELECTOROF( glue );
1991 context->Eip = OFFSETOF ( glue );
1992 }
1993
1994 /***********************************************************************
1995 * CBClientThunkSL (KERNEL.620)
1996 */
1997 extern DWORD CALL32_CBClient( FARPROC proc, LPWORD args, WORD *stackLin, DWORD *esi );
1998 void WINAPI CBClientThunkSL( CONTEXT *context )
1999 {
2000 /* Call 32-bit relay code */
2001
2002 LPWORD args = MapSL( MAKESEGPTR( context->SegSs, LOWORD(context->Ebp) ) );
2003 FARPROC proc = CBClientRelay32[ args[2] ][ args[1] ];
2004
2005 /* fill temporary area for the asm code (see comments in winebuild) */
2006 SEGPTR stack = stack16_push( 12 );
2007 LPWORD stackLin = MapSL(stack);
2008 /* stackLin[0] and stackLin[1] reserved for the 32-bit stack ptr */
2009 stackLin[2] = wine_get_ss();
2010 stackLin[3] = 0;
2011 stackLin[4] = OFFSETOF(stack) + 12;
2012 stackLin[5] = SELECTOROF(stack);
2013 stackLin[6] = OFFSETOF(CALL32_CBClientEx_RetAddr); /* overwrite return address */
2014 stackLin[7] = SELECTOROF(CALL32_CBClientEx_RetAddr);
2015 context->Eax = CALL32_CBClient( proc, args, stackLin + 4, &context->Esi );
2016 stack16_pop( 12 );
2017 }
2018
2019 /***********************************************************************
2020 * CBClientThunkSLEx (KERNEL.621)
2021 */
2022 extern DWORD CALL32_CBClientEx( FARPROC proc, LPWORD args, WORD *stackLin, DWORD *esi, INT *nArgs );
2023 void WINAPI CBClientThunkSLEx( CONTEXT *context )
2024 {
2025 /* Call 32-bit relay code */
2026
2027 LPWORD args = MapSL( MAKESEGPTR( context->SegSs, LOWORD(context->Ebp) ) );
2028 FARPROC proc = CBClientRelay32[ args[2] ][ args[1] ];
2029 INT nArgs;
2030 LPWORD stackLin;
2031
2032 /* fill temporary area for the asm code (see comments in winebuild) */
2033 SEGPTR stack = stack16_push( 24 );
2034 stackLin = MapSL(stack);
2035 stackLin[0] = OFFSETOF(stack) + 4;
2036 stackLin[1] = SELECTOROF(stack);
2037 stackLin[2] = wine_get_ds();
2038 stackLin[5] = OFFSETOF(stack) + 24;
2039 /* stackLin[6] and stackLin[7] reserved for the 32-bit stack ptr */
2040 stackLin[8] = wine_get_ss();
2041 stackLin[9] = 0;
2042 stackLin[10] = OFFSETOF(CALL32_CBClientEx_RetAddr);
2043 stackLin[11] = SELECTOROF(CALL32_CBClientEx_RetAddr);
2044
2045 context->Eax = CALL32_CBClientEx( proc, args, stackLin, &context->Esi, &nArgs );
2046 stack16_pop( 24 );
2047
2048 /* Restore registers saved by CBClientGlueSL */
2049 stackLin = (LPWORD)((LPBYTE)CURRENT_STACK16 + sizeof(STACK16FRAME) - 4);
2050 context->Ebp = (context->Ebp & ~0xffff) | stackLin[3];
2051 context->Esi = (context->Esi & ~0xffff) | stackLin[2];
2052 context->Edi = (context->Edi & ~0xffff) | stackLin[1];
2053 context->SegDs = stackLin[0];
2054 context->Esp += 16+nArgs;
2055
2056 /* Return to caller of CBClient thunklet */
2057 context->SegCs = stackLin[9];
2058 context->Eip = stackLin[8];
2059 }
2060
2061
2062 /***********************************************************************
2063 * Get16DLLAddress (KERNEL32.@)
2064 *
2065 * This function is used by a Win32s DLL if it wants to call a Win16 function.
2066 * A 16:16 segmented pointer to the function is returned.
2067 * Written without any docu.
2068 */
2069 SEGPTR WINAPI Get16DLLAddress(HMODULE16 handle, LPSTR func_name)
2070 {
2071 static WORD code_sel32;
2072 FARPROC16 proc_16;
2073 LPBYTE thunk;
2074
2075 if (!code_sel32)
2076 {
2077 if (!ThunkletHeap) THUNK_Init();
2078 code_sel32 = SELECTOR_AllocBlock( ThunkletHeap, 0x10000,
2079 WINE_LDT_FLAGS_CODE | WINE_LDT_FLAGS_32BIT );
2080 if (!code_sel32) return 0;
2081 }
2082 if (!(thunk = HeapAlloc( ThunkletHeap, 0, 32 ))) return 0;
2083
2084 if (!handle) handle = GetModuleHandle16("WIN32S16");
2085 proc_16 = GetProcAddress16(handle, func_name);
2086
2087 /* movl proc_16, $edx */
2088 *thunk++ = 0xba;
2089 *(FARPROC16 *)thunk = proc_16;
2090 thunk += sizeof(FARPROC16);
2091
2092 /* jmpl QT_Thunk */
2093 *thunk++ = 0xea;
2094 *(void **)thunk = QT_Thunk;
2095 thunk += sizeof(FARPROC16);
2096 *(WORD *)thunk = wine_get_cs();
2097
2098 return MAKESEGPTR( code_sel32, (char *)thunk - (char *)ThunkletHeap );
2099 }
2100
2101
2102 /***********************************************************************
2103 * GetWin16DOSEnv (KERNEL32.34)
2104 * Returns some internal value.... probably the default environment database?
2105 */
2106 DWORD WINAPI GetWin16DOSEnv(void)
2107 {
2108 FIXME("stub, returning 0\n");
2109 return 0;
2110 }
2111
2112 /**********************************************************************
2113 * GetPK16SysVar (KERNEL32.92)
2114 */
2115 LPVOID WINAPI GetPK16SysVar(void)
2116 {
2117 static BYTE PK16SysVar[128];
2118
2119 FIXME("()\n");
2120 return PK16SysVar;
2121 }
2122
2123 /**********************************************************************
2124 * CommonUnimpStub (KERNEL32.17)
2125 */
2126 int WINAPI __regs_CommonUnimpStub( const char *name, int type )
2127 {
2128 FIXME("generic stub %s\n", debugstr_a(name));
2129
2130 switch (type)
2131 {
2132 case 15: return -1;
2133 case 14: return ERROR_CALL_NOT_IMPLEMENTED;
2134 case 13: return ERROR_NOT_SUPPORTED;
2135 case 1: return 1;
2136 default: return 0;
2137 }
2138 }
2139 __ASM_STDCALL_FUNC( CommonUnimpStub, 0,
2140 "pushl %ecx\n\t"
2141 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2142 "shrl $4,%ecx\n\t"
2143 "andl $0xf,%ecx\n\t"
2144 "pushl %ecx\n\t"
2145 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2146 "pushl %eax\n\t"
2147 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2148 "call " __ASM_NAME("__regs_CommonUnimpStub") __ASM_STDCALL(8) "\n\t"
2149 __ASM_CFI(".cfi_adjust_cfa_offset -8\n\t")
2150 "popl %ecx\n\t"
2151 __ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
2152 "andl $0xf,%ecx\n\t"
2153 "movl (%esp),%edx\n\t"
2154 "leal (%esp,%ecx,4),%esp\n\t"
2155 "movl %edx,(%esp)\n\t"
2156 "ret" )
2157
2158 /**********************************************************************
2159 * HouseCleanLogicallyDeadHandles (KERNEL32.33)
2160 */
2161 void WINAPI HouseCleanLogicallyDeadHandles(void)
2162 {
2163 /* Whatever this is supposed to do, our handles probably
2164 don't need it :-) */
2165 }
2166
2167 /**********************************************************************
2168 * @ (KERNEL32.100)
2169 */
2170 BOOL WINAPI _KERNEL32_100(HANDLE threadid,DWORD exitcode,DWORD x)
2171 {
2172 FIXME("(%p,%d,0x%08x): stub\n",threadid,exitcode,x);
2173 return TRUE;
2174 }
2175
2176 /**********************************************************************
2177 * @ (KERNEL32.99)
2178 *
2179 * Checks whether the clock has to be switched from daylight
2180 * savings time to standard time or vice versa.
2181 *
2182 */
2183 DWORD WINAPI _KERNEL32_99(DWORD x)
2184 {
2185 FIXME("(0x%08x): stub\n",x);
2186 return 1;
2187 }
2188
2189
2190 /***********************************************************************
2191 * Helper for k32 family functions
2192 */
2193 static void *user32_proc_address(const char *proc_name)
2194 {
2195 static HMODULE hUser32;
2196
2197 if(!hUser32) hUser32 = LoadLibraryA("user32.dll");
2198 return GetProcAddress(hUser32, proc_name);
2199 }
2200
2201 /***********************************************************************
2202 * k32CharToOemBuffA (KERNEL32.11)
2203 */
2204 BOOL WINAPI k32CharToOemBuffA(LPCSTR s, LPSTR d, DWORD len)
2205 {
2206 WCHAR *bufW;
2207
2208 if ((bufW = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) )))
2209 {
2210 MultiByteToWideChar( CP_ACP, 0, s, len, bufW, len );
2211 WideCharToMultiByte( CP_OEMCP, 0, bufW, len, d, len, NULL, NULL );
2212 HeapFree( GetProcessHeap(), 0, bufW );
2213 }
2214 return TRUE;
2215 }
2216
2217 /***********************************************************************
2218 * k32CharToOemA (KERNEL32.10)
2219 */
2220 BOOL WINAPI k32CharToOemA(LPCSTR s, LPSTR d)
2221 {
2222 if (!s || !d) return TRUE;
2223 return k32CharToOemBuffA( s, d, strlen(s) + 1 );
2224 }
2225
2226 /***********************************************************************
2227 * k32OemToCharBuffA (KERNEL32.13)
2228 */
2229 BOOL WINAPI k32OemToCharBuffA(LPCSTR s, LPSTR d, DWORD len)
2230 {
2231 WCHAR *bufW;
2232
2233 if ((bufW = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) )))
2234 {
2235 MultiByteToWideChar( CP_OEMCP, 0, s, len, bufW, len );
2236 WideCharToMultiByte( CP_ACP, 0, bufW, len, d, len, NULL, NULL );
2237 HeapFree( GetProcessHeap(), 0, bufW );
2238 }
2239 return TRUE;
2240 }
2241
2242 /***********************************************************************
2243 * k32OemToCharA (KERNEL32.12)
2244 */
2245 BOOL WINAPI k32OemToCharA(LPCSTR s, LPSTR d)
2246 {
2247 return k32OemToCharBuffA( s, d, strlen(s) + 1 );
2248 }
2249
2250 /**********************************************************************
2251 * k32LoadStringA (KERNEL32.14)
2252 */
2253 INT WINAPI k32LoadStringA(HINSTANCE instance, UINT resource_id,
2254 LPSTR buffer, INT buflen)
2255 {
2256 static INT (WINAPI *pLoadStringA)(HINSTANCE, UINT, LPSTR, INT);
2257
2258 if(!pLoadStringA) pLoadStringA = user32_proc_address("LoadStringA");
2259 return pLoadStringA(instance, resource_id, buffer, buflen);
2260 }
2261
2262 /***********************************************************************
2263 * k32wvsprintfA (KERNEL32.16)
2264 */
2265 INT WINAPI k32wvsprintfA(LPSTR buffer, LPCSTR spec, __ms_va_list args)
2266 {
2267 static INT (WINAPI *pwvsprintfA)(LPSTR, LPCSTR, __ms_va_list);
2268
2269 if(!pwvsprintfA) pwvsprintfA = user32_proc_address("wvsprintfA");
2270 return (*pwvsprintfA)(buffer, spec, args);
2271 }
2272
2273 /***********************************************************************
2274 * k32wsprintfA (KERNEL32.15)
2275 */
2276 INT WINAPIV k32wsprintfA(LPSTR buffer, LPCSTR spec, ...)
2277 {
2278 __ms_va_list args;
2279 INT res;
2280
2281 __ms_va_start(args, spec);
2282 res = k32wvsprintfA(buffer, spec, args);
2283 __ms_va_end(args);
2284 return res;
2285 }
2286
2287 /**********************************************************************
2288 * Catch (KERNEL.55)
2289 *
2290 * Real prototype is:
2291 * INT16 WINAPI Catch( LPCATCHBUF lpbuf );
2292 */
2293 void WINAPI Catch16( LPCATCHBUF lpbuf, CONTEXT *context )
2294 {
2295 /* Note: we don't save the current ss, as the catch buffer is */
2296 /* only 9 words long. Hopefully no one will have the silly */
2297 /* idea to change the current stack before calling Throw()... */
2298
2299 /* Windows uses:
2300 * lpbuf[0] = ip
2301 * lpbuf[1] = cs
2302 * lpbuf[2] = sp
2303 * lpbuf[3] = bp
2304 * lpbuf[4] = si
2305 * lpbuf[5] = di
2306 * lpbuf[6] = ds
2307 * lpbuf[7] = unused
2308 * lpbuf[8] = ss
2309 */
2310
2311 lpbuf[0] = LOWORD(context->Eip);
2312 lpbuf[1] = context->SegCs;
2313 /* Windows pushes 4 more words before saving sp */
2314 lpbuf[2] = LOWORD(context->Esp) - 4 * sizeof(WORD);
2315 lpbuf[3] = LOWORD(context->Ebp);
2316 lpbuf[4] = LOWORD(context->Esi);
2317 lpbuf[5] = LOWORD(context->Edi);
2318 lpbuf[6] = context->SegDs;
2319 lpbuf[7] = 0;
2320 lpbuf[8] = context->SegSs;
2321 context->Eax &= ~0xffff; /* Return 0 */
2322 }
2323
2324
2325 /**********************************************************************
2326 * Throw (KERNEL.56)
2327 *
2328 * Real prototype is:
2329 * INT16 WINAPI Throw( LPCATCHBUF lpbuf, INT16 retval );
2330 */
2331 void WINAPI Throw16( LPCATCHBUF lpbuf, INT16 retval, CONTEXT *context )
2332 {
2333 STACK16FRAME *pFrame;
2334 STACK32FRAME *frame32;
2335
2336 context->Eax = (context->Eax & ~0xffff) | (WORD)retval;
2337
2338 /* Find the frame32 corresponding to the frame16 we are jumping to */
2339 pFrame = CURRENT_STACK16;
2340 frame32 = pFrame->frame32;
2341 while (frame32 && frame32->frame16)
2342 {
2343 if (OFFSETOF(frame32->frame16) < OFFSETOF(NtCurrentTeb()->WOW32Reserved))
2344 break; /* Something strange is going on */
2345 if (OFFSETOF(frame32->frame16) > lpbuf[2])
2346 {
2347 /* We found the right frame */
2348 pFrame->frame32 = frame32;
2349 break;
2350 }
2351 frame32 = ((STACK16FRAME *)MapSL(frame32->frame16))->frame32;
2352 }
2353 RtlUnwind( &pFrame->frame32->frame, NULL, NULL, 0 );
2354
2355 context->Eip = lpbuf[0];
2356 context->SegCs = lpbuf[1];
2357 context->Esp = lpbuf[2] + 4 * sizeof(WORD) - sizeof(WORD) /*extra arg*/;
2358 context->Ebp = lpbuf[3];
2359 context->Esi = lpbuf[4];
2360 context->Edi = lpbuf[5];
2361 context->SegDs = lpbuf[6];
2362
2363 if (lpbuf[8] != context->SegSs)
2364 ERR("Switching stack segment with Throw() not supported; expect crash now\n" );
2365 }
2366
2367
2368 /*
2369 * 16-bit WOW routines (in KERNEL)
2370 */
2371
2372 /**********************************************************************
2373 * GetVDMPointer32W (KERNEL.516)
2374 */
2375 DWORD WINAPI GetVDMPointer32W16( SEGPTR vp, UINT16 fMode )
2376 {
2377 GlobalPageLock16(GlobalHandle16(SELECTOROF(vp)));
2378 return (DWORD)K32WOWGetVDMPointer( vp, 0, (DWORD)fMode );
2379 }
2380
2381 /***********************************************************************
2382 * LoadLibraryEx32W (KERNEL.513)
2383 */
2384 DWORD WINAPI LoadLibraryEx32W16( LPCSTR lpszLibFile, DWORD hFile, DWORD dwFlags )
2385 {
2386 HMODULE hModule;
2387 DWORD mutex_count;
2388 OFSTRUCT ofs;
2389 const char *p;
2390
2391 if (!lpszLibFile)
2392 {
2393 SetLastError(ERROR_INVALID_PARAMETER);
2394 return 0;
2395 }
2396
2397 /* if the file cannot be found, call LoadLibraryExA anyway, since it might be
2398 a builtin module. This case is handled in MODULE_LoadLibraryExA */
2399
2400 if ((p = strrchr( lpszLibFile, '.' )) && !strchr( p, '\\' )) /* got an extension */
2401 {
2402 if (OpenFile16( lpszLibFile, &ofs, OF_EXIST ) != HFILE_ERROR16)
2403 lpszLibFile = ofs.szPathName;
2404 }
2405 else
2406 {
2407 char buffer[MAX_PATH+4];
2408 strcpy( buffer, lpszLibFile );
2409 strcat( buffer, ".dll" );
2410 if (OpenFile16( buffer, &ofs, OF_EXIST ) != HFILE_ERROR16)
2411 lpszLibFile = ofs.szPathName;
2412 }
2413
2414 ReleaseThunkLock( &mutex_count );
2415 hModule = LoadLibraryExA( lpszLibFile, (HANDLE)hFile, dwFlags );
2416 RestoreThunkLock( mutex_count );
2417
2418 return (DWORD)hModule;
2419 }
2420
2421 /***********************************************************************
2422 * GetProcAddress32W (KERNEL.515)
2423 */
2424 DWORD WINAPI GetProcAddress32W16( DWORD hModule, LPCSTR lpszProc )
2425 {
2426 return (DWORD)GetProcAddress( (HMODULE)hModule, lpszProc );
2427 }
2428
2429 /***********************************************************************
2430 * FreeLibrary32W (KERNEL.514)
2431 */
2432 DWORD WINAPI FreeLibrary32W16( DWORD hLibModule )
2433 {
2434 BOOL retv;
2435 DWORD mutex_count;
2436
2437 ReleaseThunkLock( &mutex_count );
2438 retv = FreeLibrary( (HMODULE)hLibModule );
2439 RestoreThunkLock( mutex_count );
2440 return (DWORD)retv;
2441 }
2442
2443
2444 #define CPEX_DEST_STDCALL 0x00000000
2445 #define CPEX_DEST_CDECL 0x80000000
2446
2447 /**********************************************************************
2448 * WOW_CallProc32W
2449 */
2450 static DWORD WOW_CallProc32W16( FARPROC proc32, DWORD nrofargs, DWORD *args )
2451 {
2452 DWORD ret;
2453 DWORD mutex_count;
2454
2455 ReleaseThunkLock( &mutex_count );
2456 if (!proc32) ret = 0;
2457 else ret = call_entry_point( proc32, nrofargs & ~CPEX_DEST_CDECL, args );
2458 RestoreThunkLock( mutex_count );
2459
2460 TRACE("returns %08x\n",ret);
2461 return ret;
2462 }
2463
2464 /**********************************************************************
2465 * CallProc32W (KERNEL.517)
2466 */
2467 DWORD WINAPIV CallProc32W16( DWORD nrofargs, DWORD argconvmask, FARPROC proc32, VA_LIST16 valist )
2468 {
2469 DWORD args[32];
2470 unsigned int i;
2471
2472 TRACE("(%d,%d,%p args[",nrofargs,argconvmask,proc32);
2473
2474 for (i=0;i<nrofargs;i++)
2475 {
2476 if (argconvmask & (1<<i))
2477 {
2478 SEGPTR ptr = VA_ARG16( valist, SEGPTR );
2479 /* pascal convention, have to reverse the arguments order */
2480 args[nrofargs - i - 1] = (DWORD)MapSL(ptr);
2481 TRACE("%08x(%p),",ptr,MapSL(ptr));
2482 }
2483 else
2484 {
2485 DWORD arg = VA_ARG16( valist, DWORD );
2486 /* pascal convention, have to reverse the arguments order */
2487 args[nrofargs - i - 1] = arg;
2488 TRACE("%d,", arg);
2489 }
2490 }
2491 TRACE("])\n");
2492
2493 /* POP nrofargs DWORD arguments and 3 DWORD parameters */
2494 stack16_pop( (3 + nrofargs) * sizeof(DWORD) );
2495
2496 return WOW_CallProc32W16( proc32, nrofargs, args );
2497 }
2498
2499 /**********************************************************************
2500 * _CallProcEx32W (KERNEL.518)
2501 */
2502 DWORD WINAPIV CallProcEx32W16( DWORD nrofargs, DWORD argconvmask, FARPROC proc32, VA_LIST16 valist )
2503 {
2504 DWORD args[32];
2505 unsigned int i;
2506
2507 TRACE("(%d,%d,%p args[",nrofargs,argconvmask,proc32);
2508
2509 for (i=0;i<nrofargs;i++)
2510 {
2511 if (argconvmask & (1<<i))
2512 {
2513 SEGPTR ptr = VA_ARG16( valist, SEGPTR );
2514 args[i] = (DWORD)MapSL(ptr);
2515 TRACE("%08x(%p),",ptr,MapSL(ptr));
2516 }
2517 else
2518 {
2519 DWORD arg = VA_ARG16( valist, DWORD );
2520 args[i] = arg;
2521 TRACE("%d,", arg);
2522 }
2523 }
2524 TRACE("])\n");
2525 return WOW_CallProc32W16( proc32, nrofargs, args );
2526 }
2527
2528
2529 /**********************************************************************
2530 * WOW16Call (KERNEL.500)
2531 *
2532 * FIXME!!!
2533 *
2534 */
2535 DWORD WINAPIV WOW16Call(WORD x, WORD y, WORD z, VA_LIST16 args)
2536 {
2537 int i;
2538 DWORD calladdr;
2539 FIXME("(0x%04x,0x%04x,%d),calling (",x,y,z);
2540
2541 for (i=0;i<x/2;i++) {
2542 WORD a = VA_ARG16(args,WORD);
2543 DPRINTF("%04x ",a);
2544 }
2545 calladdr = VA_ARG16(args,DWORD);
2546 stack16_pop( 3*sizeof(WORD) + x + sizeof(DWORD) );
2547 DPRINTF(") calling address was 0x%08x\n",calladdr);
2548 return 0;
2549 }
Windows API implementation