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kernel32/lcformat: Avoid back jumps on failure.
[wine/multimedia.git] / dlls / kernel32 / thunk.c
blob78ba2f73805450614d05331ed7483bd3fde48db7
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 int call_entry_point( void *func, int nb_args, const DWORD *args );
153 extern void __wine_call_from_16_thunk(void);
154
155 /* Push a DWORD on the 32-bit stack */
156 static inline void stack32_push( CONTEXT86 *context, DWORD val )
157 {
158 context->Esp -= sizeof(DWORD);
159 *(DWORD *)context->Esp = val;
160 }
161
162 /* Pop a DWORD from the 32-bit stack */
163 static inline DWORD stack32_pop( CONTEXT86 *context )
164 {
165 DWORD ret = *(DWORD *)context->Esp;
166 context->Esp += sizeof(DWORD);
167 return ret;
168 }
169
170 /***********************************************************************
171 * *
172 * Win95 internal thunks *
173 * *
174 ***********************************************************************/
175
176 /***********************************************************************
177 * LogApiThk (KERNEL.423)
178 */
179 void WINAPI LogApiThk( LPSTR func )
180 {
181 TRACE( "%s\n", debugstr_a(func) );
182 }
183
184 /***********************************************************************
185 * LogApiThkLSF (KERNEL32.42)
186 *
187 * NOTE: needs to preserve all registers!
188 */
189 void WINAPI __regs_LogApiThkLSF( LPSTR func, CONTEXT86 *context )
190 {
191 TRACE( "%s\n", debugstr_a(func) );
192 }
193 DEFINE_REGS_ENTRYPOINT( LogApiThkLSF, 1 )
194
195 /***********************************************************************
196 * LogApiThkSL (KERNEL32.44)
197 *
198 * NOTE: needs to preserve all registers!
199 */
200 void WINAPI __regs_LogApiThkSL( LPSTR func, CONTEXT86 *context )
201 {
202 TRACE( "%s\n", debugstr_a(func) );
203 }
204 DEFINE_REGS_ENTRYPOINT( LogApiThkSL, 1 )
205
206 /***********************************************************************
207 * LogCBThkSL (KERNEL32.47)
208 *
209 * NOTE: needs to preserve all registers!
210 */
211 void WINAPI __regs_LogCBThkSL( LPSTR func, CONTEXT86 *context )
212 {
213 TRACE( "%s\n", debugstr_a(func) );
214 }
215 DEFINE_REGS_ENTRYPOINT( LogCBThkSL, 1 )
216
217 /***********************************************************************
218 * Generates a FT_Prolog call.
219 *
220 * 0FB6D1 movzbl edx,cl
221 * 8B1495xxxxxxxx mov edx,[4*edx + targetTable]
222 * 68xxxxxxxx push FT_Prolog
223 * C3 lret
224 */
225 static void _write_ftprolog(LPBYTE relayCode ,DWORD *targetTable) {
226 LPBYTE x;
227
228 x = relayCode;
229 *x++ = 0x0f;*x++=0xb6;*x++=0xd1; /* movzbl edx,cl */
230 *x++ = 0x8B;*x++=0x14;*x++=0x95;*(DWORD**)x= targetTable;
231 x+=4; /* mov edx, [4*edx + targetTable] */
232 *x++ = 0x68; *(DWORD*)x = (DWORD)GetProcAddress(kernel32_handle,"FT_Prolog");
233 x+=4; /* push FT_Prolog */
234 *x++ = 0xC3; /* lret */
235 /* fill rest with 0xCC / int 3 */
236 }
237
238 /***********************************************************************
239 * _write_qtthunk (internal)
240 * Generates a QT_Thunk style call.
241 *
242 * 33C9 xor ecx, ecx
243 * 8A4DFC mov cl , [ebp-04]
244 * 8B148Dxxxxxxxx mov edx, [4*ecx + targetTable]
245 * B8yyyyyyyy mov eax, QT_Thunk
246 * FFE0 jmp eax
247 */
248 static void _write_qtthunk(
249 LPBYTE relayCode, /* [in] start of QT_Thunk stub */
250 DWORD *targetTable /* [in] start of thunk (for index lookup) */
251 ) {
252 LPBYTE x;
253
254 x = relayCode;
255 *x++ = 0x33;*x++=0xC9; /* xor ecx,ecx */
256 *x++ = 0x8A;*x++=0x4D;*x++=0xFC; /* movb cl,[ebp-04] */
257 *x++ = 0x8B;*x++=0x14;*x++=0x8D;*(DWORD**)x= targetTable;
258 x+=4; /* mov edx, [4*ecx + targetTable */
259 *x++ = 0xB8; *(DWORD*)x = (DWORD)GetProcAddress(kernel32_handle,"QT_Thunk");
260 x+=4; /* mov eax , QT_Thunk */
261 *x++ = 0xFF; *x++ = 0xE0; /* jmp eax */
262 /* should fill the rest of the 32 bytes with 0xCC */
263 }
264
265 /***********************************************************************
266 * _loadthunk
267 */
268 static LPVOID _loadthunk(LPCSTR module, LPCSTR func, LPCSTR module32,
269 struct ThunkDataCommon *TD32, DWORD checksum)
270 {
271 struct ThunkDataCommon *TD16;
272 HMODULE16 hmod;
273 int ordinal;
274
275 if ((hmod = LoadLibrary16(module)) <= 32)
276 {
277 ERR("(%s, %s, %s): Unable to load '%s', error %d\n",
278 module, func, module32, module, hmod);
279 return 0;
280 }
281
282 if ( !(ordinal = NE_GetOrdinal(hmod, func))
283 || !(TD16 = MapSL((SEGPTR)NE_GetEntryPointEx(hmod, ordinal, FALSE))))
284 {
285 ERR("Unable to find thunk data '%s' in %s, required by %s (conflicting/incorrect DLL versions !?).\n",
286 func, module, module32);
287 return 0;
288 }
289
290 if (TD32 && memcmp(TD16->magic, TD32->magic, 4))
291 {
292 ERR("(%s, %s, %s): Bad magic %c%c%c%c (should be %c%c%c%c)\n",
293 module, func, module32,
294 TD16->magic[0], TD16->magic[1], TD16->magic[2], TD16->magic[3],
295 TD32->magic[0], TD32->magic[1], TD32->magic[2], TD32->magic[3]);
296 return 0;
297 }
298
299 if (TD32 && TD16->checksum != TD32->checksum)
300 {
301 ERR("(%s, %s, %s): Wrong checksum %08x (should be %08x)\n",
302 module, func, module32, TD16->checksum, TD32->checksum);
303 return 0;
304 }
305
306 if (!TD32 && checksum && checksum != *(LPDWORD)TD16)
307 {
308 ERR("(%s, %s, %s): Wrong checksum %08x (should be %08x)\n",
309 module, func, module32, *(LPDWORD)TD16, checksum);
310 return 0;
311 }
312
313 return TD16;
314 }
315
316 /***********************************************************************
317 * GetThunkStuff (KERNEL32.53)
318 */
319 LPVOID WINAPI GetThunkStuff(LPCSTR module, LPCSTR func)
320 {
321 return _loadthunk(module, func, "<kernel>", NULL, 0L);
322 }
323
324 /***********************************************************************
325 * GetThunkBuff (KERNEL32.52)
326 * Returns a pointer to ThkBuf in the 16bit library SYSTHUNK.DLL.
327 */
328 LPVOID WINAPI GetThunkBuff(void)
329 {
330 return GetThunkStuff("SYSTHUNK.DLL", "ThkBuf");
331 }
332
333 /***********************************************************************
334 * ThunkConnect32 (KERNEL32.@)
335 * Connects a 32bit and a 16bit thunkbuffer.
336 */
337 UINT WINAPI ThunkConnect32(
338 struct ThunkDataCommon *TD, /* [in/out] thunkbuffer */
339 LPSTR thunkfun16, /* [in] win16 thunkfunction */
340 LPSTR module16, /* [in] name of win16 dll */
341 LPSTR module32, /* [in] name of win32 dll */
342 HMODULE hmod32, /* [in] hmodule of win32 dll */
343 DWORD dwReason /* [in] initialisation argument */
344 ) {
345 BOOL directionSL;
346
347 if (!strncmp(TD->magic, "SL01", 4))
348 {
349 directionSL = TRUE;
350
351 TRACE("SL01 thunk %s (%p) <- %s (%s), Reason: %d\n",
352 module32, TD, module16, thunkfun16, dwReason);
353 }
354 else if (!strncmp(TD->magic, "LS01", 4))
355 {
356 directionSL = FALSE;
357
358 TRACE("LS01 thunk %s (%p) -> %s (%s), Reason: %d\n",
359 module32, TD, module16, thunkfun16, dwReason);
360 }
361 else
362 {
363 ERR("Invalid magic %c%c%c%c\n",
364 TD->magic[0], TD->magic[1], TD->magic[2], TD->magic[3]);
365 return 0;
366 }
367
368 switch (dwReason)
369 {
370 case DLL_PROCESS_ATTACH:
371 {
372 struct ThunkDataCommon *TD16;
373 if (!(TD16 = _loadthunk(module16, thunkfun16, module32, TD, 0L)))
374 return 0;
375
376 if (directionSL)
377 {
378 struct ThunkDataSL32 *SL32 = (struct ThunkDataSL32 *)TD;
379 struct ThunkDataSL16 *SL16 = (struct ThunkDataSL16 *)TD16;
380 struct SLTargetDB *tdb;
381
382 if (SL16->fpData == NULL)
383 {
384 ERR("ThunkConnect16 was not called!\n");
385 return 0;
386 }
387
388 SL32->data = SL16->fpData;
389
390 tdb = HeapAlloc(GetProcessHeap(), 0, sizeof(*tdb));
391 tdb->process = GetCurrentProcessId();
392 tdb->targetTable = (DWORD *)(thunkfun16 + SL32->offsetTargetTable);
393
394 tdb->next = SL32->data->targetDB; /* FIXME: not thread-safe! */
395 SL32->data->targetDB = tdb;
396
397 TRACE("Process %08x allocated TargetDB entry for ThunkDataSL %p\n",
398 GetCurrentProcessId(), SL32->data);
399 }
400 else
401 {
402 struct ThunkDataLS32 *LS32 = (struct ThunkDataLS32 *)TD;
403 struct ThunkDataLS16 *LS16 = (struct ThunkDataLS16 *)TD16;
404
405 LS32->targetTable = MapSL(LS16->targetTable);
406
407 /* write QT_Thunk and FT_Prolog stubs */
408 _write_qtthunk ((LPBYTE)TD + LS32->offsetQTThunk, LS32->targetTable);
409 _write_ftprolog((LPBYTE)TD + LS32->offsetFTProlog, LS32->targetTable);
410 }
411 break;
412 }
413
414 case DLL_PROCESS_DETACH:
415 /* FIXME: cleanup */
416 break;
417 }
418
419 return 1;
420 }
421
422 /**********************************************************************
423 * QT_Thunk (KERNEL32.@)
424 *
425 * The target address is in EDX.
426 * The 16bit arguments start at ESP.
427 * The number of 16bit argument bytes is EBP-ESP-0x40 (64 Byte thunksetup).
428 * So the stack layout is 16bit argument bytes and then the 64 byte
429 * scratch buffer.
430 * The scratch buffer is used as work space by Windows' QT_Thunk
431 * function.
432 * As the programs unfortunately don't always provide a fixed size
433 * scratch buffer (danger, stack corruption ahead !!), we simply resort
434 * to copying over the whole EBP-ESP range to the 16bit stack
435 * (as there's no way to safely figure out the param count
436 * due to this misbehaviour of some programs).
437 * [ok]
438 *
439 * See DDJ article 9614c for a very good description of QT_Thunk (also
440 * available online !).
441 *
442 * FIXME: DDJ talks of certain register usage rules; I'm not sure
443 * whether we cover this 100%.
444 */
445 void WINAPI __regs_QT_Thunk( CONTEXT86 *context )
446 {
447 CONTEXT86 context16;
448 DWORD argsize;
449
450 context16 = *context;
451
452 context16.SegFs = wine_get_fs();
453 context16.SegGs = wine_get_gs();
454 context16.SegCs = HIWORD(context->Edx);
455 context16.Eip = LOWORD(context->Edx);
456 /* point EBP to the STACK16FRAME on the stack
457 * for the call_to_16 to set up the register content on calling */
458 context16.Ebp = OFFSETOF(NtCurrentTeb()->WOW32Reserved) + FIELD_OFFSET(STACK16FRAME,bp);
459
460 /*
461 * used to be (problematic):
462 * argsize = context->Ebp - context->Esp - 0x40;
463 * due to some programs abusing the API, we better assume the full
464 * EBP - ESP range for copying instead: */
465 argsize = context->Ebp - context->Esp;
466
467 /* ok, too much is insane; let's limit param count a bit again */
468 if (argsize > 64)
469 argsize = 64; /* 32 WORDs */
470
471 WOWCallback16Ex( 0, WCB16_REGS, argsize, (void *)context->Esp, (DWORD *)&context16 );
472 context->Eax = context16.Eax;
473 context->Edx = context16.Edx;
474 context->Ecx = context16.Ecx;
475
476 /* make sure to update the Win32 ESP, too, in order to throw away
477 * the number of parameters that the Win16 function
478 * accepted (that it popped from the corresponding Win16 stack) */
479 context->Esp += LOWORD(context16.Esp) -
480 ( OFFSETOF(NtCurrentTeb()->WOW32Reserved) - argsize );
481 }
482 DEFINE_REGS_ENTRYPOINT( QT_Thunk, 0 )
483
484
485 /**********************************************************************
486 * FT_Prolog (KERNEL32.@)
487 *
488 * The set of FT_... thunk routines is used instead of QT_Thunk,
489 * if structures have to be converted from 32-bit to 16-bit
490 * (change of member alignment, conversion of members).
491 *
492 * The thunk function (as created by the thunk compiler) calls
493 * FT_Prolog at the beginning, to set up a stack frame and
494 * allocate a 64 byte buffer on the stack.
495 * The input parameters (target address and some flags) are
496 * saved for later use by FT_Thunk.
497 *
498 * Input: EDX 16-bit target address (SEGPTR)
499 * CX bits 0..7 target number (in target table)
500 * bits 8..9 some flags (unclear???)
501 * bits 10..15 number of DWORD arguments
502 *
503 * Output: A new stackframe is created, and a 64 byte buffer
504 * allocated on the stack. The layout of the stack
505 * on return is as follows:
506 *
507 * (ebp+4) return address to caller of thunk function
508 * (ebp) old EBP
509 * (ebp-4) saved EBX register of caller
510 * (ebp-8) saved ESI register of caller
511 * (ebp-12) saved EDI register of caller
512 * (ebp-16) saved ECX register, containing flags
513 * (ebp-20) bitmap containing parameters that are to be converted
514 * by FT_Thunk; it is initialized to 0 by FT_Prolog and
515 * filled in by the thunk code before calling FT_Thunk
516 * (ebp-24)
517 * ... (unclear)
518 * (ebp-44)
519 * (ebp-48) saved EAX register of caller (unclear, never restored???)
520 * (ebp-52) saved EDX register, containing 16-bit thunk target
521 * (ebp-56)
522 * ... (unclear)
523 * (ebp-64)
524 *
525 * ESP is EBP-64 after return.
526 *
527 */
528 void WINAPI __regs_FT_Prolog( CONTEXT86 *context )
529 {
530 /* Build stack frame */
531 stack32_push(context, context->Ebp);
532 context->Ebp = context->Esp;
533
534 /* Allocate 64-byte Thunk Buffer */
535 context->Esp -= 64;
536 memset((char *)context->Esp, '\0', 64);
537
538 /* Store Flags (ECX) and Target Address (EDX) */
539 /* Save other registers to be restored later */
540 *(DWORD *)(context->Ebp - 4) = context->Ebx;
541 *(DWORD *)(context->Ebp - 8) = context->Esi;
542 *(DWORD *)(context->Ebp - 12) = context->Edi;
543 *(DWORD *)(context->Ebp - 16) = context->Ecx;
544
545 *(DWORD *)(context->Ebp - 48) = context->Eax;
546 *(DWORD *)(context->Ebp - 52) = context->Edx;
547 }
548 DEFINE_REGS_ENTRYPOINT( FT_Prolog, 0 )
549
550 /**********************************************************************
551 * FT_Thunk (KERNEL32.@)
552 *
553 * This routine performs the actual call to 16-bit code,
554 * similar to QT_Thunk. The differences are:
555 * - The call target is taken from the buffer created by FT_Prolog
556 * - Those arguments requested by the thunk code (by setting the
557 * corresponding bit in the bitmap at EBP-20) are converted
558 * from 32-bit pointers to segmented pointers (those pointers
559 * are guaranteed to point to structures copied to the stack
560 * by the thunk code, so we always use the 16-bit stack selector
561 * for those addresses).
562 *
563 * The bit #i of EBP-20 corresponds here to the DWORD starting at
564 * ESP+4 + 2*i.
565 *
566 * FIXME: It is unclear what happens if there are more than 32 WORDs
567 * of arguments, so that the single DWORD bitmap is no longer
568 * sufficient ...
569 */
570 void WINAPI __regs_FT_Thunk( CONTEXT86 *context )
571 {
572 DWORD mapESPrelative = *(DWORD *)(context->Ebp - 20);
573 DWORD callTarget = *(DWORD *)(context->Ebp - 52);
574
575 CONTEXT86 context16;
576 DWORD i, argsize;
577 DWORD newstack[32];
578 LPBYTE oldstack;
579
580 context16 = *context;
581
582 context16.SegFs = wine_get_fs();
583 context16.SegGs = wine_get_gs();
584 context16.SegCs = HIWORD(callTarget);
585 context16.Eip = LOWORD(callTarget);
586 context16.Ebp = OFFSETOF(NtCurrentTeb()->WOW32Reserved) + FIELD_OFFSET(STACK16FRAME,bp);
587
588 argsize = context->Ebp-context->Esp-0x40;
589 if (argsize > sizeof(newstack)) argsize = sizeof(newstack);
590 oldstack = (LPBYTE)context->Esp;
591
592 memcpy( newstack, oldstack, argsize );
593
594 for (i = 0; i < 32; i++) /* NOTE: What about > 32 arguments? */
595 if (mapESPrelative & (1 << i))
596 {
597 SEGPTR *arg = (SEGPTR *)newstack[i];
598 *arg = MAKESEGPTR(SELECTOROF(NtCurrentTeb()->WOW32Reserved),
599 OFFSETOF(NtCurrentTeb()->WOW32Reserved) - argsize
600 + (*(LPBYTE *)arg - oldstack));
601 }
602
603 WOWCallback16Ex( 0, WCB16_REGS, argsize, newstack, (DWORD *)&context16 );
604 context->Eax = context16.Eax;
605 context->Edx = context16.Edx;
606 context->Ecx = context16.Ecx;
607
608 context->Esp += LOWORD(context16.Esp) -
609 ( OFFSETOF(NtCurrentTeb()->WOW32Reserved) - argsize );
610
611 /* Copy modified buffers back to 32-bit stack */
612 memcpy( oldstack, newstack, argsize );
613 }
614 DEFINE_REGS_ENTRYPOINT( FT_Thunk, 0 )
615
616 /***********************************************************************
617 * FT_Exit0 (KERNEL32.@)
618 * FT_Exit4 (KERNEL32.@)
619 * FT_Exit8 (KERNEL32.@)
620 * FT_Exit12 (KERNEL32.@)
621 * FT_Exit16 (KERNEL32.@)
622 * FT_Exit20 (KERNEL32.@)
623 * FT_Exit24 (KERNEL32.@)
624 * FT_Exit28 (KERNEL32.@)
625 * FT_Exit32 (KERNEL32.@)
626 * FT_Exit36 (KERNEL32.@)
627 * FT_Exit40 (KERNEL32.@)
628 * FT_Exit44 (KERNEL32.@)
629 * FT_Exit48 (KERNEL32.@)
630 * FT_Exit52 (KERNEL32.@)
631 * FT_Exit56 (KERNEL32.@)
632 *
633 * One of the FT_ExitNN functions is called at the end of the thunk code.
634 * It removes the stack frame created by FT_Prolog, moves the function
635 * return from EBX to EAX (yes, FT_Thunk did use EAX for the return
636 * value, but the thunk code has moved it from EAX to EBX in the
637 * meantime ... :-), restores the caller's EBX, ESI, and EDI registers,
638 * and perform a return to the CALLER of the thunk code (while removing
639 * the given number of arguments from the caller's stack).
640 */
641 #define FT_EXIT_RESTORE_REGS \
642 "movl %ebx,%eax\n\t" \
643 "movl -4(%ebp),%ebx\n\t" \
644 "movl -8(%ebp),%esi\n\t" \
645 "movl -12(%ebp),%edi\n\t" \
646 "leave\n\t"
647
648 #define DEFINE_FT_Exit(n) \
649 __ASM_STDCALL_FUNC( FT_Exit ## n, 0, FT_EXIT_RESTORE_REGS "ret $" #n )
650
651 DEFINE_FT_Exit(0)
652 DEFINE_FT_Exit(4)
653 DEFINE_FT_Exit(8)
654 DEFINE_FT_Exit(12)
655 DEFINE_FT_Exit(16)
656 DEFINE_FT_Exit(20)
657 DEFINE_FT_Exit(24)
658 DEFINE_FT_Exit(28)
659 DEFINE_FT_Exit(32)
660 DEFINE_FT_Exit(36)
661 DEFINE_FT_Exit(40)
662 DEFINE_FT_Exit(44)
663 DEFINE_FT_Exit(48)
664 DEFINE_FT_Exit(52)
665 DEFINE_FT_Exit(56)
666
667
668 /***********************************************************************
669 * ThunkInitLS (KERNEL32.43)
670 * A thunkbuffer link routine
671 * The thunkbuf looks like:
672 *
673 * 00: DWORD length ? don't know exactly
674 * 04: SEGPTR ptr ? where does it point to?
675 * The pointer ptr is written into the first DWORD of 'thunk'.
676 * (probably correctly implemented)
677 * [ok probably]
678 * RETURNS
679 * segmented pointer to thunk?
680 */
681 DWORD WINAPI ThunkInitLS(
682 LPDWORD thunk, /* [in] win32 thunk */
683 LPCSTR thkbuf, /* [in] thkbuffer name in win16 dll */
684 DWORD len, /* [in] thkbuffer length */
685 LPCSTR dll16, /* [in] name of win16 dll */
686 LPCSTR dll32 /* [in] name of win32 dll (FIXME: not used?) */
687 ) {
688 LPDWORD addr;
689
690 if (!(addr = _loadthunk( dll16, thkbuf, dll32, NULL, len )))
691 return 0;
692
693 if (!addr[1])
694 return 0;
695 *thunk = addr[1];
696
697 return addr[1];
698 }
699
700 /***********************************************************************
701 * Common32ThkLS (KERNEL32.45)
702 *
703 * This is another 32->16 thunk, independent of the QT_Thunk/FT_Thunk
704 * style thunks. The basic difference is that the parameter conversion
705 * is done completely on the *16-bit* side here. Thus we do not call
706 * the 16-bit target directly, but call a common entry point instead.
707 * This entry function then calls the target according to the target
708 * number passed in the DI register.
709 *
710 * Input: EAX SEGPTR to the common 16-bit entry point
711 * CX offset in thunk table (target number * 4)
712 * DX error return value if execution fails (unclear???)
713 * EDX.HI number of DWORD parameters
714 *
715 * (Note that we need to move the thunk table offset from CX to DI !)
716 *
717 * The called 16-bit stub expects its stack to look like this:
718 * ...
719 * (esp+40) 32-bit arguments
720 * ...
721 * (esp+8) 32 byte of stack space available as buffer
722 * (esp) 8 byte return address for use with 0x66 lret
723 *
724 * The called 16-bit stub uses a 0x66 lret to return to 32-bit code,
725 * and uses the EAX register to return a DWORD return value.
726 * Thus we need to use a special assembly glue routine
727 * (CallRegisterLongProc instead of CallRegisterShortProc).
728 *
729 * Finally, we return to the caller, popping the arguments off
730 * the stack. The number of arguments to be popped is returned
731 * in the BL register by the called 16-bit routine.
732 *
733 */
734 void WINAPI __regs_Common32ThkLS( CONTEXT86 *context )
735 {
736 CONTEXT86 context16;
737 DWORD argsize;
738
739 context16 = *context;
740
741 context16.SegFs = wine_get_fs();
742 context16.SegGs = wine_get_gs();
743 context16.Edi = LOWORD(context->Ecx);
744 context16.SegCs = HIWORD(context->Eax);
745 context16.Eip = LOWORD(context->Eax);
746 context16.Ebp = OFFSETOF(NtCurrentTeb()->WOW32Reserved) + FIELD_OFFSET(STACK16FRAME,bp);
747
748 argsize = HIWORD(context->Edx) * 4;
749
750 /* FIXME: hack for stupid USER32 CallbackGlueLS routine */
751 if (context->Edx == context->Eip)
752 argsize = 6 * 4;
753
754 /* Note: the first 32 bytes we copy are just garbage from the 32-bit stack, in order to reserve
755 * the space. It is safe to do that since the register function prefix has reserved
756 * a lot more space than that below context->Esp.
757 */
758 WOWCallback16Ex( 0, WCB16_REGS, argsize + 32, (LPBYTE)context->Esp - 32, (DWORD *)&context16 );
759 context->Eax = context16.Eax;
760
761 /* Clean up caller's stack frame */
762 context->Esp += LOBYTE(context16.Ebx);
763 }
764 DEFINE_REGS_ENTRYPOINT( Common32ThkLS, 0 )
765
766 /***********************************************************************
767 * OT_32ThkLSF (KERNEL32.40)
768 *
769 * YET Another 32->16 thunk. The difference to Common32ThkLS is that
770 * argument processing is done on both the 32-bit and the 16-bit side:
771 * The 32-bit side prepares arguments, copying them onto the stack.
772 *
773 * When this routine is called, the first word on the stack is the
774 * number of argument bytes prepared by the 32-bit code, and EDX
775 * contains the 16-bit target address.
776 *
777 * The called 16-bit routine is another relaycode, doing further
778 * argument processing and then calling the real 16-bit target
779 * whose address is stored at [bp-04].
780 *
781 * The call proceeds using a normal CallRegisterShortProc.
782 * After return from the 16-bit relaycode, the arguments need
783 * to be copied *back* to the 32-bit stack, since the 32-bit
784 * relaycode processes output parameters.
785 *
786 * Note that we copy twice the number of arguments, since some of the
787 * 16-bit relaycodes in SYSTHUNK.DLL directly access the original
788 * arguments of the caller!
789 *
790 * (Note that this function seems only to be used for
791 * OLECLI32 -> OLECLI and OLESVR32 -> OLESVR thunking.)
792 */
793 void WINAPI __regs_OT_32ThkLSF( CONTEXT86 *context )
794 {
795 CONTEXT86 context16;
796 DWORD argsize;
797
798 context16 = *context;
799
800 context16.SegFs = wine_get_fs();
801 context16.SegGs = wine_get_gs();
802 context16.SegCs = HIWORD(context->Edx);
803 context16.Eip = LOWORD(context->Edx);
804 context16.Ebp = OFFSETOF(NtCurrentTeb()->WOW32Reserved) + FIELD_OFFSET(STACK16FRAME,bp);
805
806 argsize = 2 * *(WORD *)context->Esp + 2;
807
808 WOWCallback16Ex( 0, WCB16_REGS, argsize, (void *)context->Esp, (DWORD *)&context16 );
809 context->Eax = context16.Eax;
810 context->Edx = context16.Edx;
811
812 /* Copy modified buffers back to 32-bit stack */
813 memcpy( (LPBYTE)context->Esp,
814 (LPBYTE)CURRENT_STACK16 - argsize, argsize );
815
816 context->Esp += LOWORD(context16.Esp) -
817 ( OFFSETOF(NtCurrentTeb()->WOW32Reserved) - argsize );
818 }
819 DEFINE_REGS_ENTRYPOINT( OT_32ThkLSF, 0 )
820
821 /***********************************************************************
822 * ThunkInitLSF (KERNEL32.41)
823 * A thunk setup routine.
824 * Expects a pointer to a preinitialized thunkbuffer in the first argument
825 * looking like:
826 *| 00..03: unknown (pointer, check _41, _43, _46)
827 *| 04: EB1E jmp +0x20
828 *|
829 *| 06..23: unknown (space for replacement code, check .90)
830 *|
831 *| 24:>E800000000 call offset 29
832 *| 29:>58 pop eax ( target of call )
833 *| 2A: 2D25000000 sub eax,0x00000025 ( now points to offset 4 )
834 *| 2F: BAxxxxxxxx mov edx,xxxxxxxx
835 *| 34: 68yyyyyyyy push KERNEL32.90
836 *| 39: C3 ret
837 *|
838 *| 3A: EB1E jmp +0x20
839 *| 3E ... 59: unknown (space for replacement code?)
840 *| 5A: E8xxxxxxxx call <32bitoffset xxxxxxxx>
841 *| 5F: 5A pop edx
842 *| 60: 81EA25xxxxxx sub edx, 0x25xxxxxx
843 *| 66: 52 push edx
844 *| 67: 68xxxxxxxx push xxxxxxxx
845 *| 6C: 68yyyyyyyy push KERNEL32.89
846 *| 71: C3 ret
847 *| 72: end?
848 * This function checks if the code is there, and replaces the yyyyyyyy entries
849 * by the functionpointers.
850 * The thunkbuf looks like:
851 *
852 *| 00: DWORD length ? don't know exactly
853 *| 04: SEGPTR ptr ? where does it point to?
854 * The segpointer ptr is written into the first DWORD of 'thunk'.
855 * [ok probably]
856 * RETURNS
857 * unclear, pointer to win16 thkbuffer?
858 */
859 LPVOID WINAPI ThunkInitLSF(
860 LPBYTE thunk, /* [in] win32 thunk */
861 LPCSTR thkbuf, /* [in] thkbuffer name in win16 dll */
862 DWORD len, /* [in] length of thkbuffer */
863 LPCSTR dll16, /* [in] name of win16 dll */
864 LPCSTR dll32 /* [in] name of win32 dll */
865 ) {
866 LPDWORD addr,addr2;
867
868 /* FIXME: add checks for valid code ... */
869 /* write pointers to kernel32.89 and kernel32.90 (+ordinal base of 1) */
870 *(DWORD*)(thunk+0x35) = (DWORD)GetProcAddress(kernel32_handle,(LPSTR)90);
871 *(DWORD*)(thunk+0x6D) = (DWORD)GetProcAddress(kernel32_handle,(LPSTR)89);
872
873
874 if (!(addr = _loadthunk( dll16, thkbuf, dll32, NULL, len )))
875 return 0;
876
877 addr2 = MapSL(addr[1]);
878 if (HIWORD(addr2))
879 *(DWORD*)thunk = (DWORD)addr2;
880
881 return addr2;
882 }
883
884 /***********************************************************************
885 * FT_PrologPrime (KERNEL32.89)
886 *
887 * This function is called from the relay code installed by
888 * ThunkInitLSF. It replaces the location from where it was
889 * called by a standard FT_Prolog call stub (which is 'primed'
890 * by inserting the correct target table pointer).
891 * Finally, it calls that stub.
892 *
893 * Input: ECX target number + flags (passed through to FT_Prolog)
894 * (ESP) offset of location where target table pointer
895 * is stored, relative to the start of the relay code
896 * (ESP+4) pointer to start of relay code
897 * (this is where the FT_Prolog call stub gets written to)
898 *
899 * Note: The two DWORD arguments get popped off the stack.
900 *
901 */
902 void WINAPI __regs_FT_PrologPrime( CONTEXT86 *context )
903 {
904 DWORD targetTableOffset;
905 LPBYTE relayCode;
906
907 /* Compensate for the fact that the Wine register relay code thought
908 we were being called, although we were in fact jumped to */
909 context->Esp -= 4;
910
911 /* Write FT_Prolog call stub */
912 targetTableOffset = stack32_pop(context);
913 relayCode = (LPBYTE)stack32_pop(context);
914 _write_ftprolog( relayCode, *(DWORD **)(relayCode+targetTableOffset) );
915
916 /* Jump to the call stub just created */
917 context->Eip = (DWORD)relayCode;
918 }
919 DEFINE_REGS_ENTRYPOINT( FT_PrologPrime, 0 )
920
921 /***********************************************************************
922 * QT_ThunkPrime (KERNEL32.90)
923 *
924 * This function corresponds to FT_PrologPrime, but installs a
925 * call stub for QT_Thunk instead.
926 *
927 * Input: (EBP-4) target number (passed through to QT_Thunk)
928 * EDX target table pointer location offset
929 * EAX start of relay code
930 *
931 */
932 void WINAPI __regs_QT_ThunkPrime( CONTEXT86 *context )
933 {
934 DWORD targetTableOffset;
935 LPBYTE relayCode;
936
937 /* Compensate for the fact that the Wine register relay code thought
938 we were being called, although we were in fact jumped to */
939 context->Esp -= 4;
940
941 /* Write QT_Thunk call stub */
942 targetTableOffset = context->Edx;
943 relayCode = (LPBYTE)context->Eax;
944 _write_qtthunk( relayCode, *(DWORD **)(relayCode+targetTableOffset) );
945
946 /* Jump to the call stub just created */
947 context->Eip = (DWORD)relayCode;
948 }
949 DEFINE_REGS_ENTRYPOINT( QT_ThunkPrime, 0 )
950
951 /***********************************************************************
952 * ThunkInitSL (KERNEL32.46)
953 * Another thunkbuf link routine.
954 * The start of the thunkbuf looks like this:
955 * 00: DWORD length
956 * 04: SEGPTR address for thunkbuffer pointer
957 * [ok probably]
958 *
959 * RETURNS
960 * Nothing.
961 */
962 VOID WINAPI ThunkInitSL(
963 LPBYTE thunk, /* [in] start of thunkbuffer */
964 LPCSTR thkbuf, /* [in] name/ordinal of thunkbuffer in win16 dll */
965 DWORD len, /* [in] length of thunkbuffer */
966 LPCSTR dll16, /* [in] name of win16 dll containing the thkbuf */
967 LPCSTR dll32 /* [in] win32 dll. FIXME: strange, unused */
968 ) {
969 LPDWORD addr;
970
971 if (!(addr = _loadthunk( dll16, thkbuf, dll32, NULL, len )))
972 return;
973
974 *(DWORD*)MapSL(addr[1]) = (DWORD)thunk;
975 }
976
977 /**********************************************************************
978 * SSInit (KERNEL.700)
979 * RETURNS
980 * TRUE for success.
981 */
982 BOOL WINAPI SSInit16(void)
983 {
984 return TRUE;
985 }
986
987 /**********************************************************************
988 * SSOnBigStack (KERNEL32.87)
989 * Check if thunking is initialized (ss selector set up etc.)
990 * We do that differently, so just return TRUE.
991 * [ok]
992 * RETURNS
993 * TRUE for success.
994 */
995 BOOL WINAPI SSOnBigStack(void)
996 {
997 TRACE("Yes, thunking is initialized\n");
998 return TRUE;
999 }
1000
1001 /**********************************************************************
1002 * SSConfirmSmallStack (KERNEL.704)
1003 *
1004 * Abort if not on small stack.
1005 *
1006 * This must be a register routine as it has to preserve *all* registers.
1007 */
1008 void WINAPI SSConfirmSmallStack( CONTEXT86 *context )
1009 {
1010 /* We are always on the small stack while in 16-bit code ... */
1011 }
1012
1013 /**********************************************************************
1014 * SSCall (KERNEL32.88)
1015 * One of the real thunking functions. This one seems to be for 32<->32
1016 * thunks. It should probably be capable of crossing processboundaries.
1017 *
1018 * And YES, I've seen nr=48 (somewhere in the Win95 32<->16 OLE coupling)
1019 * [ok]
1020 *
1021 * RETURNS
1022 * Thunked function result.
1023 */
1024 DWORD WINAPIV SSCall(
1025 DWORD nr, /* [in] number of argument bytes */
1026 DWORD flags, /* [in] FIXME: flags ? */
1027 FARPROC fun, /* [in] function to call */
1028 ... /* [in/out] arguments */
1029 ) {
1030 DWORD i,ret;
1031 DWORD *args = ((DWORD *)&fun) + 1;
1032
1033 if(TRACE_ON(thunk))
1034 {
1035 DPRINTF("(%d,0x%08x,%p,[",nr,flags,fun);
1036 for (i=0;i<nr/4;i++)
1037 DPRINTF("0x%08x,",args[i]);
1038 DPRINTF("])\n");
1039 }
1040 ret = call_entry_point( fun, nr / sizeof(DWORD), args );
1041 TRACE(" returning %d ...\n",ret);
1042 return ret;
1043 }
1044
1045 /**********************************************************************
1046 * W32S_BackTo32 (KERNEL32.51)
1047 */
1048 void WINAPI __regs_W32S_BackTo32( CONTEXT86 *context )
1049 {
1050 LPDWORD stack = (LPDWORD)context->Esp;
1051 FARPROC proc = (FARPROC)context->Eip;
1052
1053 context->Eax = call_entry_point( proc, 10, stack + 1 );
1054 context->Eip = stack32_pop(context);
1055 }
1056 DEFINE_REGS_ENTRYPOINT( W32S_BackTo32, 0 )
1057
1058 /**********************************************************************
1059 * AllocSLCallback (KERNEL32.@)
1060 *
1061 * Allocate a 16->32 callback.
1062 *
1063 * NOTES
1064 * Win95 uses some structchains for callbacks. It allocates them
1065 * in blocks of 100 entries, size 32 bytes each, layout:
1066 * blockstart:
1067 *| 0: PTR nextblockstart
1068 *| 4: entry *first;
1069 *| 8: WORD sel ( start points to blockstart)
1070 *| A: WORD unknown
1071 * 100xentry:
1072 *| 00..17: Code
1073 *| 18: PDB *owning_process;
1074 *| 1C: PTR blockstart
1075 *
1076 * We ignore this for now. (Just a note for further developers)
1077 * FIXME: use this method, so we don't waste selectors...
1078 *
1079 * Following code is then generated by AllocSLCallback. The code is 16 bit, so
1080 * the 0x66 prefix switches from word->long registers.
1081 *
1082 *| 665A pop edx
1083 *| 6668x arg2 x pushl <arg2>
1084 *| 6652 push edx
1085 *| EAx arg1 x jmpf <arg1>
1086 *
1087 * returns the startaddress of this thunk.
1088 *
1089 * Note, that they look very similar to the ones allocates by THUNK_Alloc.
1090 * RETURNS
1091 * A segmented pointer to the start of the thunk
1092 */
1093 DWORD WINAPI
1094 AllocSLCallback(
1095 DWORD finalizer, /* [in] Finalizer function */
1096 DWORD callback /* [in] Callback function */
1097 ) {
1098 LPBYTE x,thunk = HeapAlloc( GetProcessHeap(), 0, 32 );
1099 WORD sel;
1100
1101 x=thunk;
1102 *x++=0x66;*x++=0x5a; /* popl edx */
1103 *x++=0x66;*x++=0x68;*(DWORD*)x=finalizer;x+=4; /* pushl finalizer */
1104 *x++=0x66;*x++=0x52; /* pushl edx */
1105 *x++=0xea;*(DWORD*)x=callback;x+=4; /* jmpf callback */
1106
1107 *(DWORD*)(thunk+18) = GetCurrentProcessId();
1108
1109 sel = SELECTOR_AllocBlock( thunk, 32, WINE_LDT_FLAGS_CODE );
1110 return (sel<<16)|0;
1111 }
1112
1113 /**********************************************************************
1114 * FreeSLCallback (KERNEL32.@)
1115 * Frees the specified 16->32 callback
1116 *
1117 * RETURNS
1118 * Nothing.
1119 */
1120 void WINAPI
1121 FreeSLCallback(
1122 DWORD x /* [in] 16 bit callback (segmented pointer?) */
1123 ) {
1124 FIXME("(0x%08x): stub\n",x);
1125 }
1126
1127 /**********************************************************************
1128 * AllocMappedBuffer (KERNEL32.38)
1129 *
1130 * This is an undocumented KERNEL32 function that
1131 * SMapLS's a GlobalAlloc'ed buffer.
1132 *
1133 * RETURNS
1134 * EDI register: pointer to buffer
1135 *
1136 * NOTES
1137 * The buffer is preceded by 8 bytes:
1138 * ...
1139 * edi+0 buffer
1140 * edi-4 SEGPTR to buffer
1141 * edi-8 some magic Win95 needs for SUnMapLS
1142 * (we use it for the memory handle)
1143 *
1144 * The SEGPTR is used by the caller!
1145 */
1146 void WINAPI __regs_AllocMappedBuffer(
1147 CONTEXT86 *context /* [in] EDI register: size of buffer to allocate */
1148 ) {
1149 HGLOBAL handle = GlobalAlloc(0, context->Edi + 8);
1150 DWORD *buffer = GlobalLock(handle);
1151 DWORD ptr = 0;
1152
1153 if (buffer)
1154 if (!(ptr = MapLS(buffer + 2)))
1155 {
1156 GlobalUnlock(handle);
1157 GlobalFree(handle);
1158 }
1159
1160 if (!ptr)
1161 context->Eax = context->Edi = 0;
1162 else
1163 {
1164 buffer[0] = (DWORD)handle;
1165 buffer[1] = ptr;
1166
1167 context->Eax = ptr;
1168 context->Edi = (DWORD)(buffer + 2);
1169 }
1170 }
1171 DEFINE_REGS_ENTRYPOINT( AllocMappedBuffer, 0 )
1172
1173 /**********************************************************************
1174 * FreeMappedBuffer (KERNEL32.39)
1175 *
1176 * Free a buffer allocated by AllocMappedBuffer
1177 *
1178 * RETURNS
1179 * Nothing.
1180 */
1181 void WINAPI __regs_FreeMappedBuffer(
1182 CONTEXT86 *context /* [in] EDI register: pointer to buffer */
1183 ) {
1184 if (context->Edi)
1185 {
1186 DWORD *buffer = (DWORD *)context->Edi - 2;
1187
1188 UnMapLS(buffer[1]);
1189
1190 GlobalUnlock((HGLOBAL)buffer[0]);
1191 GlobalFree((HGLOBAL)buffer[0]);
1192 }
1193 }
1194 DEFINE_REGS_ENTRYPOINT( FreeMappedBuffer, 0 )
1195
1196 /**********************************************************************
1197 * GetTEBSelectorFS (KERNEL.475)
1198 * Set the 16-bit %fs to the 32-bit %fs (current TEB selector)
1199 */
1200 void WINAPI GetTEBSelectorFS16(void)
1201 {
1202 CURRENT_STACK16->fs = wine_get_fs();
1203 }
1204
1205 /**********************************************************************
1206 * IsPeFormat (KERNEL.431)
1207 *
1208 * Determine if a file is a PE format executable.
1209 *
1210 * RETURNS
1211 * TRUE, if it is.
1212 * FALSE if the file could not be opened or is not a PE file.
1213 *
1214 * NOTES
1215 * If fn is given as NULL then the function expects hf16 to be valid.
1216 */
1217 BOOL16 WINAPI IsPeFormat16(
1218 LPSTR fn, /* [in] Filename to the executable */
1219 HFILE16 hf16) /* [in] An open file handle */
1220 {
1221 BOOL ret = FALSE;
1222 IMAGE_DOS_HEADER mzh;
1223 OFSTRUCT ofs;
1224 DWORD xmagic;
1225
1226 if (fn) hf16 = OpenFile16(fn,&ofs,OF_READ);
1227 if (hf16 == HFILE_ERROR16) return FALSE;
1228 _llseek16(hf16,0,SEEK_SET);
1229 if (sizeof(mzh)!=_lread16(hf16,&mzh,sizeof(mzh))) goto done;
1230 if (mzh.e_magic!=IMAGE_DOS_SIGNATURE) goto done;
1231 _llseek16(hf16,mzh.e_lfanew,SEEK_SET);
1232 if (sizeof(DWORD)!=_lread16(hf16,&xmagic,sizeof(DWORD))) goto done;
1233 ret = (xmagic == IMAGE_NT_SIGNATURE);
1234 done:
1235 _lclose16(hf16);
1236 return ret;
1237 }
1238
1239
1240 /***********************************************************************
1241 * K32Thk1632Prolog (KERNEL32.@)
1242 */
1243 void WINAPI __regs_K32Thk1632Prolog( CONTEXT86 *context )
1244 {
1245 LPBYTE code = (LPBYTE)context->Eip - 5;
1246
1247 /* Arrrgh! SYSTHUNK.DLL just has to re-implement another method
1248 of 16->32 thunks instead of using one of the standard methods!
1249 This means that SYSTHUNK.DLL itself switches to a 32-bit stack,
1250 and does a far call to the 32-bit code segment of OLECLI32/OLESVR32.
1251 Unfortunately, our CallTo/CallFrom mechanism is therefore completely
1252 bypassed, which means it will crash the next time the 32-bit OLE
1253 code thunks down again to 16-bit (this *will* happen!).
1254
1255 The following hack tries to recognize this situation.
1256 This is possible since the called stubs in OLECLI32/OLESVR32 all
1257 look exactly the same:
1258 00 E8xxxxxxxx call K32Thk1632Prolog
1259 05 FF55FC call [ebp-04]
1260 08 E8xxxxxxxx call K32Thk1632Epilog
1261 0D 66CB retf
1262
1263 If we recognize this situation, we try to simulate the actions
1264 of our CallTo/CallFrom mechanism by copying the 16-bit stack
1265 to our 32-bit stack, creating a proper STACK16FRAME and
1266 updating cur_stack. */
1267
1268 if ( code[5] == 0xFF && code[6] == 0x55 && code[7] == 0xFC
1269 && code[13] == 0x66 && code[14] == 0xCB)
1270 {
1271 DWORD argSize = context->Ebp - context->Esp;
1272 char *stack16 = (char *)context->Esp - 4;
1273 STACK16FRAME *frame16 = (STACK16FRAME *)stack16 - 1;
1274 STACK32FRAME *frame32 = NtCurrentTeb()->WOW32Reserved;
1275 char *stack32 = (char *)frame32 - argSize;
1276 WORD stackSel = SELECTOROF(frame32->frame16);
1277 DWORD stackBase = GetSelectorBase(stackSel);
1278
1279 TRACE("before SYSTHUNK hack: EBP: %08x ESP: %08x cur_stack: %p\n",
1280 context->Ebp, context->Esp, NtCurrentTeb()->WOW32Reserved);
1281
1282 memset(frame16, '\0', sizeof(STACK16FRAME));
1283 frame16->frame32 = frame32;
1284 frame16->ebp = context->Ebp;
1285
1286 memcpy(stack32, stack16, argSize);
1287 NtCurrentTeb()->WOW32Reserved = (void *)MAKESEGPTR(stackSel, (DWORD)frame16 - stackBase);
1288
1289 context->Esp = (DWORD)stack32 + 4;
1290 context->Ebp = context->Esp + argSize;
1291
1292 TRACE("after SYSTHUNK hack: EBP: %08x ESP: %08x cur_stack: %p\n",
1293 context->Ebp, context->Esp, NtCurrentTeb()->WOW32Reserved);
1294 }
1295
1296 /* entry_point is never used again once the entry point has
1297 been called. Thus we re-use it to hold the Win16Lock count */
1298 ReleaseThunkLock(&CURRENT_STACK16->entry_point);
1299 }
1300 DEFINE_REGS_ENTRYPOINT( K32Thk1632Prolog, 0 )
1301
1302 /***********************************************************************
1303 * K32Thk1632Epilog (KERNEL32.@)
1304 */
1305 void WINAPI __regs_K32Thk1632Epilog( CONTEXT86 *context )
1306 {
1307 LPBYTE code = (LPBYTE)context->Eip - 13;
1308
1309 RestoreThunkLock(CURRENT_STACK16->entry_point);
1310
1311 /* We undo the SYSTHUNK hack if necessary. See K32Thk1632Prolog. */
1312
1313 if ( code[5] == 0xFF && code[6] == 0x55 && code[7] == 0xFC
1314 && code[13] == 0x66 && code[14] == 0xCB)
1315 {
1316 STACK16FRAME *frame16 = MapSL((SEGPTR)NtCurrentTeb()->WOW32Reserved);
1317 char *stack16 = (char *)(frame16 + 1);
1318 DWORD argSize = frame16->ebp - (DWORD)stack16;
1319 char *stack32 = (char *)frame16->frame32 - argSize;
1320
1321 DWORD nArgsPopped = context->Esp - (DWORD)stack32;
1322
1323 TRACE("before SYSTHUNK hack: EBP: %08x ESP: %08x cur_stack: %p\n",
1324 context->Ebp, context->Esp, NtCurrentTeb()->WOW32Reserved);
1325
1326 NtCurrentTeb()->WOW32Reserved = frame16->frame32;
1327
1328 context->Esp = (DWORD)stack16 + nArgsPopped;
1329 context->Ebp = frame16->ebp;
1330
1331 TRACE("after SYSTHUNK hack: EBP: %08x ESP: %08x cur_stack: %p\n",
1332 context->Ebp, context->Esp, NtCurrentTeb()->WOW32Reserved);
1333 }
1334 }
1335 DEFINE_REGS_ENTRYPOINT( K32Thk1632Epilog, 0 )
1336
1337 /*********************************************************************
1338 * PK16FNF [KERNEL32.91]
1339 *
1340 * This routine fills in the supplied 13-byte (8.3 plus terminator)
1341 * string buffer with the 8.3 filename of a recently loaded 16-bit
1342 * module. It is unknown exactly what modules trigger this
1343 * mechanism or what purpose this serves. Win98 Explorer (and
1344 * probably also Win95 with IE 4 shell integration) calls this
1345 * several times during initialization.
1346 *
1347 * FIXME: find out what this really does and make it work.
1348 */
1349 void WINAPI PK16FNF(LPSTR strPtr)
1350 {
1351 FIXME("(%p): stub\n", strPtr);
1352
1353 /* fill in a fake filename that'll be easy to recognize */
1354 strcpy(strPtr, "WINESTUB.FIX");
1355 }
1356
1357 /***********************************************************************
1358 * 16->32 Flat Thunk routines:
1359 */
1360
1361 /***********************************************************************
1362 * ThunkConnect16 (KERNEL.651)
1363 * Connects a 32bit and a 16bit thunkbuffer.
1364 */
1365 UINT WINAPI ThunkConnect16(
1366 LPSTR module16, /* [in] name of win16 dll */
1367 LPSTR module32, /* [in] name of win32 dll */
1368 HINSTANCE16 hInst16, /* [in] hInst of win16 dll */
1369 DWORD dwReason, /* [in] initialisation argument */
1370 struct ThunkDataCommon *TD, /* [in/out] thunkbuffer */
1371 LPSTR thunkfun32, /* [in] win32 thunkfunction */
1372 WORD cs /* [in] CS of win16 dll */
1373 ) {
1374 BOOL directionSL;
1375
1376 if (!strncmp(TD->magic, "SL01", 4))
1377 {
1378 directionSL = TRUE;
1379
1380 TRACE("SL01 thunk %s (%p) -> %s (%s), Reason: %d\n",
1381 module16, TD, module32, thunkfun32, dwReason);
1382 }
1383 else if (!strncmp(TD->magic, "LS01", 4))
1384 {
1385 directionSL = FALSE;
1386
1387 TRACE("LS01 thunk %s (%p) <- %s (%s), Reason: %d\n",
1388 module16, TD, module32, thunkfun32, dwReason);
1389 }
1390 else
1391 {
1392 ERR("Invalid magic %c%c%c%c\n",
1393 TD->magic[0], TD->magic[1], TD->magic[2], TD->magic[3]);
1394 return 0;
1395 }
1396
1397 switch (dwReason)
1398 {
1399 case DLL_PROCESS_ATTACH:
1400 if (directionSL)
1401 {
1402 struct ThunkDataSL16 *SL16 = (struct ThunkDataSL16 *)TD;
1403 struct ThunkDataSL *SL = SL16->fpData;
1404
1405 if (SL == NULL)
1406 {
1407 SL = HeapAlloc(GetProcessHeap(), 0, sizeof(*SL));
1408
1409 SL->common = SL16->common;
1410 SL->flags1 = SL16->flags1;
1411 SL->flags2 = SL16->flags2;
1412
1413 SL->apiDB = MapSL(SL16->apiDatabase);
1414 SL->targetDB = NULL;
1415
1416 lstrcpynA(SL->pszDll16, module16, 255);
1417 lstrcpynA(SL->pszDll32, module32, 255);
1418
1419 /* We should create a SEGPTR to the ThunkDataSL,
1420 but since the contents are not in the original format,
1421 any access to this by 16-bit code would crash anyway. */
1422 SL16->spData = 0;
1423 SL16->fpData = SL;
1424 }
1425
1426
1427 if (SL->flags2 & 0x80000000)
1428 {
1429 TRACE("Preloading 32-bit library\n");
1430 LoadLibraryA(module32);
1431 }
1432 }
1433 else
1434 {
1435 /* nothing to do */
1436 }
1437 break;
1438
1439 case DLL_PROCESS_DETACH:
1440 /* FIXME: cleanup */
1441 break;
1442 }
1443
1444 return 1;
1445 }
1446
1447
1448 /***********************************************************************
1449 * C16ThkSL (KERNEL.630)
1450 */
1451
1452 void WINAPI C16ThkSL(CONTEXT86 *context)
1453 {
1454 LPBYTE stub = MapSL(context->Eax), x = stub;
1455 WORD cs = wine_get_cs();
1456 WORD ds = wine_get_ds();
1457
1458 /* We produce the following code:
1459 *
1460 * mov ax, __FLATDS
1461 * mov es, ax
1462 * movzx ecx, cx
1463 * mov edx, es:[ecx + $EDX]
1464 * push bp
1465 * push edx
1466 * push dx
1467 * push edx
1468 * call __FLATCS:__wine_call_from_16_thunk
1469 */
1470
1471 *x++ = 0xB8; *(WORD *)x = ds; x += sizeof(WORD);
1472 *x++ = 0x8E; *x++ = 0xC0;
1473 *x++ = 0x66; *x++ = 0x0F; *x++ = 0xB7; *x++ = 0xC9;
1474 *x++ = 0x67; *x++ = 0x66; *x++ = 0x26; *x++ = 0x8B;
1475 *x++ = 0x91; *(DWORD *)x = context->Edx; x += sizeof(DWORD);
1476
1477 *x++ = 0x55;
1478 *x++ = 0x66; *x++ = 0x52;
1479 *x++ = 0x52;
1480 *x++ = 0x66; *x++ = 0x52;
1481 *x++ = 0x66; *x++ = 0x9A;
1482 *(void **)x = __wine_call_from_16_thunk; x += sizeof(void *);
1483 *(WORD *)x = cs; x += sizeof(WORD);
1484
1485 /* Jump to the stub code just created */
1486 context->Eip = LOWORD(context->Eax);
1487 context->SegCs = HIWORD(context->Eax);
1488
1489 /* Since C16ThkSL got called by a jmp, we need to leave the
1490 original return address on the stack */
1491 context->Esp -= 4;
1492 }
1493
1494 /***********************************************************************
1495 * C16ThkSL01 (KERNEL.631)
1496 */
1497
1498 void WINAPI C16ThkSL01(CONTEXT86 *context)
1499 {
1500 LPBYTE stub = MapSL(context->Eax), x = stub;
1501
1502 if (stub)
1503 {
1504 struct ThunkDataSL16 *SL16 = MapSL(context->Edx);
1505 struct ThunkDataSL *td = SL16->fpData;
1506
1507 DWORD procAddress = (DWORD)GetProcAddress16(GetModuleHandle16("KERNEL"), (LPCSTR)631);
1508 WORD cs = wine_get_cs();
1509
1510 if (!td)
1511 {
1512 ERR("ThunkConnect16 was not called!\n");
1513 return;
1514 }
1515
1516 TRACE("Creating stub for ThunkDataSL %p\n", td);
1517
1518
1519 /* We produce the following code:
1520 *
1521 * xor eax, eax
1522 * mov edx, $td
1523 * call C16ThkSL01
1524 * push bp
1525 * push edx
1526 * push dx
1527 * push edx
1528 * call __FLATCS:__wine_call_from_16_thunk
1529 */
1530
1531 *x++ = 0x66; *x++ = 0x33; *x++ = 0xC0;
1532 *x++ = 0x66; *x++ = 0xBA; *(void **)x = td; x += sizeof(void *);
1533 *x++ = 0x9A; *(DWORD *)x = procAddress; x += sizeof(DWORD);
1534
1535 *x++ = 0x55;
1536 *x++ = 0x66; *x++ = 0x52;
1537 *x++ = 0x52;
1538 *x++ = 0x66; *x++ = 0x52;
1539 *x++ = 0x66; *x++ = 0x9A;
1540 *(void **)x = __wine_call_from_16_thunk; x += sizeof(void *);
1541 *(WORD *)x = cs; x += sizeof(WORD);
1542
1543 /* Jump to the stub code just created */
1544 context->Eip = LOWORD(context->Eax);
1545 context->SegCs = HIWORD(context->Eax);
1546
1547 /* Since C16ThkSL01 got called by a jmp, we need to leave the
1548 original return address on the stack */
1549 context->Esp -= 4;
1550 }
1551 else
1552 {
1553 struct ThunkDataSL *td = (struct ThunkDataSL *)context->Edx;
1554 DWORD targetNr = LOWORD(context->Ecx) / 4;
1555 struct SLTargetDB *tdb;
1556
1557 TRACE("Process %08x calling target %d of ThunkDataSL %p\n",
1558 GetCurrentProcessId(), targetNr, td);
1559
1560 for (tdb = td->targetDB; tdb; tdb = tdb->next)
1561 if (tdb->process == GetCurrentProcessId())
1562 break;
1563
1564 if (!tdb)
1565 {
1566 TRACE("Loading 32-bit library %s\n", td->pszDll32);
1567 LoadLibraryA(td->pszDll32);
1568
1569 for (tdb = td->targetDB; tdb; tdb = tdb->next)
1570 if (tdb->process == GetCurrentProcessId())
1571 break;
1572 }
1573
1574 if (tdb)
1575 {
1576 context->Edx = tdb->targetTable[targetNr];
1577
1578 TRACE("Call target is %08x\n", context->Edx);
1579 }
1580 else
1581 {
1582 WORD *stack = MapSL( MAKESEGPTR(context->SegSs, LOWORD(context->Esp)) );
1583 context->Edx = (context->Edx & ~0xffff) | HIWORD(td->apiDB[targetNr].errorReturnValue);
1584 context->Eax = (context->Eax & ~0xffff) | LOWORD(td->apiDB[targetNr].errorReturnValue);
1585 context->Eip = stack[2];
1586 context->SegCs = stack[3];
1587 context->Esp += td->apiDB[targetNr].nrArgBytes + 4;
1588
1589 ERR("Process %08x did not ThunkConnect32 %s to %s\n",
1590 GetCurrentProcessId(), td->pszDll32, td->pszDll16);
1591 }
1592 }
1593 }
1594
1595
1596 /***********************************************************************
1597 * 16<->32 Thunklet/Callback API:
1598 */
1599
1600 #include "pshpack1.h"
1601 typedef struct _THUNKLET
1602 {
1603 BYTE prefix_target;
1604 BYTE pushl_target;
1605 DWORD target;
1606
1607 BYTE prefix_relay;
1608 BYTE pushl_relay;
1609 DWORD relay;
1610
1611 BYTE jmp_glue;
1612 DWORD glue;
1613
1614 BYTE type;
1615 HINSTANCE16 owner;
1616 struct _THUNKLET *next;
1617 } THUNKLET;
1618 #include "poppack.h"
1619
1620 #define THUNKLET_TYPE_LS 1
1621 #define THUNKLET_TYPE_SL 2
1622
1623 static HANDLE ThunkletHeap = 0;
1624 static WORD ThunkletCodeSel;
1625 static THUNKLET *ThunkletAnchor = NULL;
1626
1627 static FARPROC ThunkletSysthunkGlueLS = 0;
1628 static SEGPTR ThunkletSysthunkGlueSL = 0;
1629
1630 static FARPROC ThunkletCallbackGlueLS = 0;
1631 static SEGPTR ThunkletCallbackGlueSL = 0;
1632
1633
1634 /* map a thunk allocated on ThunkletHeap to a 16-bit pointer */
1635 static inline SEGPTR get_segptr( void *thunk )
1636 {
1637 if (!thunk) return 0;
1638 return MAKESEGPTR( ThunkletCodeSel, (char *)thunk - (char *)ThunkletHeap );
1639 }
1640
1641 /***********************************************************************
1642 * THUNK_Init
1643 */
1644 static BOOL THUNK_Init(void)
1645 {
1646 LPBYTE thunk;
1647
1648 ThunkletHeap = HeapCreate( 0, 0x10000, 0x10000 );
1649 if (!ThunkletHeap) return FALSE;
1650
1651 ThunkletCodeSel = SELECTOR_AllocBlock( ThunkletHeap, 0x10000, WINE_LDT_FLAGS_CODE );
1652
1653 thunk = HeapAlloc( ThunkletHeap, 0, 5 );
1654 if (!thunk) return FALSE;
1655
1656 ThunkletSysthunkGlueLS = (FARPROC)thunk;
1657 *thunk++ = 0x58; /* popl eax */
1658 *thunk++ = 0xC3; /* ret */
1659
1660 ThunkletSysthunkGlueSL = get_segptr( thunk );
1661 *thunk++ = 0x66; *thunk++ = 0x58; /* popl eax */
1662 *thunk++ = 0xCB; /* lret */
1663
1664 return TRUE;
1665 }
1666
1667 /***********************************************************************
1668 * SetThunkletCallbackGlue (KERNEL.560)
1669 */
1670 void WINAPI SetThunkletCallbackGlue16( FARPROC glueLS, SEGPTR glueSL )
1671 {
1672 ThunkletCallbackGlueLS = glueLS;
1673 ThunkletCallbackGlueSL = glueSL;
1674 }
1675
1676
1677 /***********************************************************************
1678 * THUNK_FindThunklet
1679 */
1680 static THUNKLET *THUNK_FindThunklet( DWORD target, DWORD relay,
1681 DWORD glue, BYTE type )
1682 {
1683 THUNKLET *thunk;
1684
1685 for (thunk = ThunkletAnchor; thunk; thunk = thunk->next)
1686 if ( thunk->type == type
1687 && thunk->target == target
1688 && thunk->relay == relay
1689 && ( type == THUNKLET_TYPE_LS ?
1690 ( thunk->glue == glue - (DWORD)&thunk->type )
1691 : ( thunk->glue == glue ) ) )
1692 return thunk;
1693
1694 return NULL;
1695 }
1696
1697 /***********************************************************************
1698 * THUNK_AllocLSThunklet
1699 */
1700 static FARPROC THUNK_AllocLSThunklet( SEGPTR target, DWORD relay,
1701 FARPROC glue, HTASK16 owner )
1702 {
1703 THUNKLET *thunk = THUNK_FindThunklet( (DWORD)target, relay, (DWORD)glue,
1704 THUNKLET_TYPE_LS );
1705 if (!thunk)
1706 {
1707 TDB *pTask = GlobalLock16( owner );
1708
1709 if (!ThunkletHeap) THUNK_Init();
1710 if ( !(thunk = HeapAlloc( ThunkletHeap, 0, sizeof(THUNKLET) )) )
1711 return 0;
1712
1713 thunk->prefix_target = thunk->prefix_relay = 0x90;
1714 thunk->pushl_target = thunk->pushl_relay = 0x68;
1715 thunk->jmp_glue = 0xE9;
1716
1717 thunk->target = (DWORD)target;
1718 thunk->relay = relay;
1719 thunk->glue = (DWORD)glue - (DWORD)&thunk->type;
1720
1721 thunk->type = THUNKLET_TYPE_LS;
1722 thunk->owner = pTask? pTask->hInstance : 0;
1723
1724 thunk->next = ThunkletAnchor;
1725 ThunkletAnchor = thunk;
1726 }
1727
1728 return (FARPROC)thunk;
1729 }
1730
1731 /***********************************************************************
1732 * THUNK_AllocSLThunklet
1733 */
1734 static SEGPTR THUNK_AllocSLThunklet( FARPROC target, DWORD relay,
1735 SEGPTR glue, HTASK16 owner )
1736 {
1737 THUNKLET *thunk = THUNK_FindThunklet( (DWORD)target, relay, (DWORD)glue,
1738 THUNKLET_TYPE_SL );
1739 if (!thunk)
1740 {
1741 TDB *pTask = GlobalLock16( owner );
1742
1743 if (!ThunkletHeap) THUNK_Init();
1744 if ( !(thunk = HeapAlloc( ThunkletHeap, 0, sizeof(THUNKLET) )) )
1745 return 0;
1746
1747 thunk->prefix_target = thunk->prefix_relay = 0x66;
1748 thunk->pushl_target = thunk->pushl_relay = 0x68;
1749 thunk->jmp_glue = 0xEA;
1750
1751 thunk->target = (DWORD)target;
1752 thunk->relay = relay;
1753 thunk->glue = (DWORD)glue;
1754
1755 thunk->type = THUNKLET_TYPE_SL;
1756 thunk->owner = pTask? pTask->hInstance : 0;
1757
1758 thunk->next = ThunkletAnchor;
1759 ThunkletAnchor = thunk;
1760 }
1761
1762 return get_segptr( thunk );
1763 }
1764
1765 /**********************************************************************
1766 * IsLSThunklet
1767 */
1768 static BOOL16 IsLSThunklet( THUNKLET *thunk )
1769 {
1770 return thunk->prefix_target == 0x90 && thunk->pushl_target == 0x68
1771 && thunk->prefix_relay == 0x90 && thunk->pushl_relay == 0x68
1772 && thunk->jmp_glue == 0xE9 && thunk->type == THUNKLET_TYPE_LS;
1773 }
1774
1775 /**********************************************************************
1776 * IsSLThunklet (KERNEL.612)
1777 */
1778 BOOL16 WINAPI IsSLThunklet16( THUNKLET *thunk )
1779 {
1780 return thunk->prefix_target == 0x66 && thunk->pushl_target == 0x68
1781 && thunk->prefix_relay == 0x66 && thunk->pushl_relay == 0x68
1782 && thunk->jmp_glue == 0xEA && thunk->type == THUNKLET_TYPE_SL;
1783 }
1784
1785
1786
1787 /***********************************************************************
1788 * AllocLSThunkletSysthunk (KERNEL.607)
1789 */
1790 FARPROC WINAPI AllocLSThunkletSysthunk16( SEGPTR target,
1791 FARPROC relay, DWORD dummy )
1792 {
1793 if (!ThunkletSysthunkGlueLS) THUNK_Init();
1794 return THUNK_AllocLSThunklet( (SEGPTR)relay, (DWORD)target,
1795 ThunkletSysthunkGlueLS, GetCurrentTask() );
1796 }
1797
1798 /***********************************************************************
1799 * AllocSLThunkletSysthunk (KERNEL.608)
1800 */
1801 SEGPTR WINAPI AllocSLThunkletSysthunk16( FARPROC target,
1802 SEGPTR relay, DWORD dummy )
1803 {
1804 if (!ThunkletSysthunkGlueSL) THUNK_Init();
1805 return THUNK_AllocSLThunklet( (FARPROC)relay, (DWORD)target,
1806 ThunkletSysthunkGlueSL, GetCurrentTask() );
1807 }
1808
1809
1810 /***********************************************************************
1811 * AllocLSThunkletCallbackEx (KERNEL.567)
1812 */
1813 FARPROC WINAPI AllocLSThunkletCallbackEx16( SEGPTR target,
1814 DWORD relay, HTASK16 task )
1815 {
1816 THUNKLET *thunk = MapSL( target );
1817 if ( !thunk ) return NULL;
1818
1819 if ( IsSLThunklet16( thunk ) && thunk->relay == relay
1820 && thunk->glue == (DWORD)ThunkletCallbackGlueSL )
1821 return (FARPROC)thunk->target;
1822
1823 return THUNK_AllocLSThunklet( target, relay,
1824 ThunkletCallbackGlueLS, task );
1825 }
1826
1827 /***********************************************************************
1828 * AllocSLThunkletCallbackEx (KERNEL.568)
1829 */
1830 SEGPTR WINAPI AllocSLThunkletCallbackEx16( FARPROC target,
1831 DWORD relay, HTASK16 task )
1832 {
1833 THUNKLET *thunk = (THUNKLET *)target;
1834 if ( !thunk ) return 0;
1835
1836 if ( IsLSThunklet( thunk ) && thunk->relay == relay
1837 && thunk->glue == (DWORD)ThunkletCallbackGlueLS - (DWORD)&thunk->type )
1838 return (SEGPTR)thunk->target;
1839
1840 return THUNK_AllocSLThunklet( target, relay,
1841 ThunkletCallbackGlueSL, task );
1842 }
1843
1844 /***********************************************************************
1845 * AllocLSThunkletCallback (KERNEL.561)
1846 * AllocLSThunkletCallback_dup (KERNEL.606)
1847 */
1848 FARPROC WINAPI AllocLSThunkletCallback16( SEGPTR target, DWORD relay )
1849 {
1850 return AllocLSThunkletCallbackEx16( target, relay, GetCurrentTask() );
1851 }
1852
1853 /***********************************************************************
1854 * AllocSLThunkletCallback (KERNEL.562)
1855 * AllocSLThunkletCallback_dup (KERNEL.605)
1856 */
1857 SEGPTR WINAPI AllocSLThunkletCallback16( FARPROC target, DWORD relay )
1858 {
1859 return AllocSLThunkletCallbackEx16( target, relay, GetCurrentTask() );
1860 }
1861
1862 /***********************************************************************
1863 * FindLSThunkletCallback (KERNEL.563)
1864 * FindLSThunkletCallback_dup (KERNEL.609)
1865 */
1866 FARPROC WINAPI FindLSThunkletCallback( SEGPTR target, DWORD relay )
1867 {
1868 THUNKLET *thunk = MapSL( target );
1869 if ( thunk && IsSLThunklet16( thunk ) && thunk->relay == relay
1870 && thunk->glue == (DWORD)ThunkletCallbackGlueSL )
1871 return (FARPROC)thunk->target;
1872
1873 thunk = THUNK_FindThunklet( (DWORD)target, relay,
1874 (DWORD)ThunkletCallbackGlueLS,
1875 THUNKLET_TYPE_LS );
1876 return (FARPROC)thunk;
1877 }
1878
1879 /***********************************************************************
1880 * FindSLThunkletCallback (KERNEL.564)
1881 * FindSLThunkletCallback_dup (KERNEL.610)
1882 */
1883 SEGPTR WINAPI FindSLThunkletCallback( FARPROC target, DWORD relay )
1884 {
1885 THUNKLET *thunk = (THUNKLET *)target;
1886 if ( thunk && IsLSThunklet( thunk ) && thunk->relay == relay
1887 && thunk->glue == (DWORD)ThunkletCallbackGlueLS - (DWORD)&thunk->type )
1888 return (SEGPTR)thunk->target;
1889
1890 thunk = THUNK_FindThunklet( (DWORD)target, relay,
1891 (DWORD)ThunkletCallbackGlueSL,
1892 THUNKLET_TYPE_SL );
1893 return get_segptr( thunk );
1894 }
1895
1896
1897 /***********************************************************************
1898 * FreeThunklet (KERNEL.611)
1899 */
1900 BOOL16 WINAPI FreeThunklet16( DWORD unused1, DWORD unused2 )
1901 {
1902 return FALSE;
1903 }
1904
1905
1906 /***********************************************************************
1907 * Callback Client API
1908 */
1909
1910 #define N_CBC_FIXED 20
1911 #define N_CBC_VARIABLE 10
1912 #define N_CBC_TOTAL (N_CBC_FIXED + N_CBC_VARIABLE)
1913
1914 static SEGPTR CBClientRelay16[ N_CBC_TOTAL ];
1915 static FARPROC *CBClientRelay32[ N_CBC_TOTAL ];
1916
1917 /***********************************************************************
1918 * RegisterCBClient (KERNEL.619)
1919 */
1920 INT16 WINAPI RegisterCBClient16( INT16 wCBCId,
1921 SEGPTR relay16, FARPROC *relay32 )
1922 {
1923 /* Search for free Callback ID */
1924 if ( wCBCId == -1 )
1925 for ( wCBCId = N_CBC_FIXED; wCBCId < N_CBC_TOTAL; wCBCId++ )
1926 if ( !CBClientRelay16[ wCBCId ] )
1927 break;
1928
1929 /* Register Callback ID */
1930 if ( wCBCId > 0 && wCBCId < N_CBC_TOTAL )
1931 {
1932 CBClientRelay16[ wCBCId ] = relay16;
1933 CBClientRelay32[ wCBCId ] = relay32;
1934 }
1935 else
1936 wCBCId = 0;
1937
1938 return wCBCId;
1939 }
1940
1941 /***********************************************************************
1942 * UnRegisterCBClient (KERNEL.622)
1943 */
1944 INT16 WINAPI UnRegisterCBClient16( INT16 wCBCId,
1945 SEGPTR relay16, FARPROC *relay32 )
1946 {
1947 if ( wCBCId >= N_CBC_FIXED && wCBCId < N_CBC_TOTAL
1948 && CBClientRelay16[ wCBCId ] == relay16
1949 && CBClientRelay32[ wCBCId ] == relay32 )
1950 {
1951 CBClientRelay16[ wCBCId ] = 0;
1952 CBClientRelay32[ wCBCId ] = 0;
1953 }
1954 else
1955 wCBCId = 0;
1956
1957 return wCBCId;
1958 }
1959
1960
1961 /***********************************************************************
1962 * InitCBClient (KERNEL.623)
1963 */
1964 void WINAPI InitCBClient16( FARPROC glueLS )
1965 {
1966 HMODULE16 kernel = GetModuleHandle16( "KERNEL" );
1967 SEGPTR glueSL = (SEGPTR)GetProcAddress16( kernel, (LPCSTR)604 );
1968
1969 SetThunkletCallbackGlue16( glueLS, glueSL );
1970 }
1971
1972 /***********************************************************************
1973 * CBClientGlueSL (KERNEL.604)
1974 */
1975 void WINAPI CBClientGlueSL( CONTEXT86 *context )
1976 {
1977 /* Create stack frame */
1978 SEGPTR stackSeg = stack16_push( 12 );
1979 LPWORD stackLin = MapSL( stackSeg );
1980 SEGPTR glue, *glueTab;
1981
1982 stackLin[3] = (WORD)context->Ebp;
1983 stackLin[2] = (WORD)context->Esi;
1984 stackLin[1] = (WORD)context->Edi;
1985 stackLin[0] = (WORD)context->SegDs;
1986
1987 context->Ebp = OFFSETOF( stackSeg ) + 6;
1988 context->Esp = OFFSETOF( stackSeg ) - 4;
1989 context->SegGs = 0;
1990
1991 /* Jump to 16-bit relay code */
1992 glueTab = MapSL( CBClientRelay16[ stackLin[5] ] );
1993 glue = glueTab[ stackLin[4] ];
1994 context->SegCs = SELECTOROF( glue );
1995 context->Eip = OFFSETOF ( glue );
1996 }
1997
1998 /***********************************************************************
1999 * CBClientThunkSL (KERNEL.620)
2000 */
2001 extern DWORD CALL32_CBClient( FARPROC proc, LPWORD args, WORD *stackLin, DWORD *esi );
2002 void WINAPI CBClientThunkSL( CONTEXT86 *context )
2003 {
2004 /* Call 32-bit relay code */
2005
2006 LPWORD args = MapSL( MAKESEGPTR( context->SegSs, LOWORD(context->Ebp) ) );
2007 FARPROC proc = CBClientRelay32[ args[2] ][ args[1] ];
2008
2009 /* fill temporary area for the asm code (see comments in winebuild) */
2010 SEGPTR stack = stack16_push( 12 );
2011 LPWORD stackLin = MapSL(stack);
2012 /* stackLin[0] and stackLin[1] reserved for the 32-bit stack ptr */
2013 stackLin[2] = wine_get_ss();
2014 stackLin[3] = 0;
2015 stackLin[4] = OFFSETOF(stack) + 12;
2016 stackLin[5] = SELECTOROF(stack);
2017 stackLin[6] = OFFSETOF(CALL32_CBClientEx_RetAddr); /* overwrite return address */
2018 stackLin[7] = SELECTOROF(CALL32_CBClientEx_RetAddr);
2019 context->Eax = CALL32_CBClient( proc, args, stackLin + 4, &context->Esi );
2020 stack16_pop( 12 );
2021 }
2022
2023 /***********************************************************************
2024 * CBClientThunkSLEx (KERNEL.621)
2025 */
2026 extern DWORD CALL32_CBClientEx( FARPROC proc, LPWORD args, WORD *stackLin, DWORD *esi, INT *nArgs );
2027 void WINAPI CBClientThunkSLEx( CONTEXT86 *context )
2028 {
2029 /* Call 32-bit relay code */
2030
2031 LPWORD args = MapSL( MAKESEGPTR( context->SegSs, LOWORD(context->Ebp) ) );
2032 FARPROC proc = CBClientRelay32[ args[2] ][ args[1] ];
2033 INT nArgs;
2034 LPWORD stackLin;
2035
2036 /* fill temporary area for the asm code (see comments in winebuild) */
2037 SEGPTR stack = stack16_push( 24 );
2038 stackLin = MapSL(stack);
2039 stackLin[0] = OFFSETOF(stack) + 4;
2040 stackLin[1] = SELECTOROF(stack);
2041 stackLin[2] = wine_get_ds();
2042 stackLin[5] = OFFSETOF(stack) + 24;
2043 /* stackLin[6] and stackLin[7] reserved for the 32-bit stack ptr */
2044 stackLin[8] = wine_get_ss();
2045 stackLin[9] = 0;
2046 stackLin[10] = OFFSETOF(CALL32_CBClientEx_RetAddr);
2047 stackLin[11] = SELECTOROF(CALL32_CBClientEx_RetAddr);
2048
2049 context->Eax = CALL32_CBClientEx( proc, args, stackLin, &context->Esi, &nArgs );
2050 stack16_pop( 24 );
2051
2052 /* Restore registers saved by CBClientGlueSL */
2053 stackLin = (LPWORD)((LPBYTE)CURRENT_STACK16 + sizeof(STACK16FRAME) - 4);
2054 context->Ebp = (context->Ebp & ~0xffff) | stackLin[3];
2055 context->Esi = (context->Esi & ~0xffff) | stackLin[2];
2056 context->Edi = (context->Edi & ~0xffff) | stackLin[1];
2057 context->SegDs = stackLin[0];
2058 context->Esp += 16+nArgs;
2059
2060 /* Return to caller of CBClient thunklet */
2061 context->SegCs = stackLin[9];
2062 context->Eip = stackLin[8];
2063 }
2064
2065
2066 /***********************************************************************
2067 * Get16DLLAddress (KERNEL32.@)
2068 *
2069 * This function is used by a Win32s DLL if it wants to call a Win16 function.
2070 * A 16:16 segmented pointer to the function is returned.
2071 * Written without any docu.
2072 */
2073 SEGPTR WINAPI Get16DLLAddress(HMODULE16 handle, LPSTR func_name)
2074 {
2075 static WORD code_sel32;
2076 FARPROC16 proc_16;
2077 LPBYTE thunk;
2078
2079 if (!code_sel32)
2080 {
2081 if (!ThunkletHeap) THUNK_Init();
2082 code_sel32 = SELECTOR_AllocBlock( ThunkletHeap, 0x10000,
2083 WINE_LDT_FLAGS_CODE | WINE_LDT_FLAGS_32BIT );
2084 if (!code_sel32) return 0;
2085 }
2086 if (!(thunk = HeapAlloc( ThunkletHeap, 0, 32 ))) return 0;
2087
2088 if (!handle) handle = GetModuleHandle16("WIN32S16");
2089 proc_16 = GetProcAddress16(handle, func_name);
2090
2091 /* movl proc_16, $edx */
2092 *thunk++ = 0xba;
2093 *(FARPROC16 *)thunk = proc_16;
2094 thunk += sizeof(FARPROC16);
2095
2096 /* jmpl QT_Thunk */
2097 *thunk++ = 0xea;
2098 *(FARPROC *)thunk = GetProcAddress(kernel32_handle,"QT_Thunk");
2099 thunk += sizeof(FARPROC16);
2100 *(WORD *)thunk = wine_get_cs();
2101
2102 return MAKESEGPTR( code_sel32, (char *)thunk - (char *)ThunkletHeap );
2103 }
2104
2105
2106 /***********************************************************************
2107 * GetWin16DOSEnv (KERNEL32.34)
2108 * Returns some internal value.... probably the default environment database?
2109 */
2110 DWORD WINAPI GetWin16DOSEnv(void)
2111 {
2112 FIXME("stub, returning 0\n");
2113 return 0;
2114 }
2115
2116 /**********************************************************************
2117 * GetPK16SysVar (KERNEL32.92)
2118 */
2119 LPVOID WINAPI GetPK16SysVar(void)
2120 {
2121 static BYTE PK16SysVar[128];
2122
2123 FIXME("()\n");
2124 return PK16SysVar;
2125 }
2126
2127 /**********************************************************************
2128 * CommonUnimpStub (KERNEL32.17)
2129 */
2130 void WINAPI __regs_CommonUnimpStub( CONTEXT86 *context )
2131 {
2132 FIXME("generic stub: %s\n", ((LPSTR)context->Eax ? (LPSTR)context->Eax : "?"));
2133
2134 switch ((context->Ecx >> 4) & 0x0f)
2135 {
2136 case 15: context->Eax = -1; break;
2137 case 14: context->Eax = 0x78; break;
2138 case 13: context->Eax = 0x32; break;
2139 case 1: context->Eax = 1; break;
2140 default: context->Eax = 0; break;
2141 }
2142
2143 context->Esp += (context->Ecx & 0x0f) * 4;
2144 }
2145 DEFINE_REGS_ENTRYPOINT( CommonUnimpStub, 0 )
2146
2147 /**********************************************************************
2148 * HouseCleanLogicallyDeadHandles (KERNEL32.33)
2149 */
2150 void WINAPI HouseCleanLogicallyDeadHandles(void)
2151 {
2152 /* Whatever this is supposed to do, our handles probably
2153 don't need it :-) */
2154 }
2155
2156 /**********************************************************************
2157 * @ (KERNEL32.100)
2158 */
2159 BOOL WINAPI _KERNEL32_100(HANDLE threadid,DWORD exitcode,DWORD x)
2160 {
2161 FIXME("(%p,%d,0x%08x): stub\n",threadid,exitcode,x);
2162 return TRUE;
2163 }
2164
2165 /**********************************************************************
2166 * @ (KERNEL32.99)
2167 *
2168 * Checks whether the clock has to be switched from daylight
2169 * savings time to standard time or vice versa.
2170 *
2171 */
2172 DWORD WINAPI _KERNEL32_99(DWORD x)
2173 {
2174 FIXME("(0x%08x): stub\n",x);
2175 return 1;
2176 }
2177
2178
2179 /***********************************************************************
2180 * Helper for k32 family functions
2181 */
2182 static void *user32_proc_address(const char *proc_name)
2183 {
2184 static HMODULE hUser32;
2185
2186 if(!hUser32) hUser32 = LoadLibraryA("user32.dll");
2187 return GetProcAddress(hUser32, proc_name);
2188 }
2189
2190 /***********************************************************************
2191 * k32CharToOemBuffA (KERNEL32.11)
2192 */
2193 BOOL WINAPI k32CharToOemBuffA(LPCSTR s, LPSTR d, DWORD len)
2194 {
2195 WCHAR *bufW;
2196
2197 if ((bufW = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) )))
2198 {
2199 MultiByteToWideChar( CP_ACP, 0, s, len, bufW, len );
2200 WideCharToMultiByte( CP_OEMCP, 0, bufW, len, d, len, NULL, NULL );
2201 HeapFree( GetProcessHeap(), 0, bufW );
2202 }
2203 return TRUE;
2204 }
2205
2206 /***********************************************************************
2207 * k32CharToOemA (KERNEL32.10)
2208 */
2209 BOOL WINAPI k32CharToOemA(LPCSTR s, LPSTR d)
2210 {
2211 if (!s || !d) return TRUE;
2212 return k32CharToOemBuffA( s, d, strlen(s) + 1 );
2213 }
2214
2215 /***********************************************************************
2216 * k32OemToCharBuffA (KERNEL32.13)
2217 */
2218 BOOL WINAPI k32OemToCharBuffA(LPCSTR s, LPSTR d, DWORD len)
2219 {
2220 WCHAR *bufW;
2221
2222 if ((bufW = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) )))
2223 {
2224 MultiByteToWideChar( CP_OEMCP, 0, s, len, bufW, len );
2225 WideCharToMultiByte( CP_ACP, 0, bufW, len, d, len, NULL, NULL );
2226 HeapFree( GetProcessHeap(), 0, bufW );
2227 }
2228 return TRUE;
2229 }
2230
2231 /***********************************************************************
2232 * k32OemToCharA (KERNEL32.12)
2233 */
2234 BOOL WINAPI k32OemToCharA(LPCSTR s, LPSTR d)
2235 {
2236 return k32OemToCharBuffA( s, d, strlen(s) + 1 );
2237 }
2238
2239 /**********************************************************************
2240 * k32LoadStringA (KERNEL32.14)
2241 */
2242 INT WINAPI k32LoadStringA(HINSTANCE instance, UINT resource_id,
2243 LPSTR buffer, INT buflen)
2244 {
2245 static INT (WINAPI *pLoadStringA)(HINSTANCE, UINT, LPSTR, INT);
2246
2247 if(!pLoadStringA) pLoadStringA = user32_proc_address("LoadStringA");
2248 return pLoadStringA(instance, resource_id, buffer, buflen);
2249 }
2250
2251 /***********************************************************************
2252 * k32wvsprintfA (KERNEL32.16)
2253 */
2254 INT WINAPI k32wvsprintfA(LPSTR buffer, LPCSTR spec, __ms_va_list args)
2255 {
2256 static INT (WINAPI *pwvsprintfA)(LPSTR, LPCSTR, __ms_va_list);
2257
2258 if(!pwvsprintfA) pwvsprintfA = user32_proc_address("wvsprintfA");
2259 return (*pwvsprintfA)(buffer, spec, args);
2260 }
2261
2262 /***********************************************************************
2263 * k32wsprintfA (KERNEL32.15)
2264 */
2265 INT WINAPIV k32wsprintfA(LPSTR buffer, LPCSTR spec, ...)
2266 {
2267 __ms_va_list args;
2268 INT res;
2269
2270 __ms_va_start(args, spec);
2271 res = k32wvsprintfA(buffer, spec, args);
2272 __ms_va_end(args);
2273 return res;
2274 }
2275
2276 /**********************************************************************
2277 * Catch (KERNEL.55)
2278 *
2279 * Real prototype is:
2280 * INT16 WINAPI Catch( LPCATCHBUF lpbuf );
2281 */
2282 void WINAPI Catch16( LPCATCHBUF lpbuf, CONTEXT86 *context )
2283 {
2284 /* Note: we don't save the current ss, as the catch buffer is */
2285 /* only 9 words long. Hopefully no one will have the silly */
2286 /* idea to change the current stack before calling Throw()... */
2287
2288 /* Windows uses:
2289 * lpbuf[0] = ip
2290 * lpbuf[1] = cs
2291 * lpbuf[2] = sp
2292 * lpbuf[3] = bp
2293 * lpbuf[4] = si
2294 * lpbuf[5] = di
2295 * lpbuf[6] = ds
2296 * lpbuf[7] = unused
2297 * lpbuf[8] = ss
2298 */
2299
2300 lpbuf[0] = LOWORD(context->Eip);
2301 lpbuf[1] = context->SegCs;
2302 /* Windows pushes 4 more words before saving sp */
2303 lpbuf[2] = LOWORD(context->Esp) - 4 * sizeof(WORD);
2304 lpbuf[3] = LOWORD(context->Ebp);
2305 lpbuf[4] = LOWORD(context->Esi);
2306 lpbuf[5] = LOWORD(context->Edi);
2307 lpbuf[6] = context->SegDs;
2308 lpbuf[7] = 0;
2309 lpbuf[8] = context->SegSs;
2310 context->Eax &= ~0xffff; /* Return 0 */
2311 }
2312
2313
2314 /**********************************************************************
2315 * Throw (KERNEL.56)
2316 *
2317 * Real prototype is:
2318 * INT16 WINAPI Throw( LPCATCHBUF lpbuf, INT16 retval );
2319 */
2320 void WINAPI Throw16( LPCATCHBUF lpbuf, INT16 retval, CONTEXT86 *context )
2321 {
2322 STACK16FRAME *pFrame;
2323 STACK32FRAME *frame32;
2324
2325 context->Eax = (context->Eax & ~0xffff) | (WORD)retval;
2326
2327 /* Find the frame32 corresponding to the frame16 we are jumping to */
2328 pFrame = CURRENT_STACK16;
2329 frame32 = pFrame->frame32;
2330 while (frame32 && frame32->frame16)
2331 {
2332 if (OFFSETOF(frame32->frame16) < OFFSETOF(NtCurrentTeb()->WOW32Reserved))
2333 break; /* Something strange is going on */
2334 if (OFFSETOF(frame32->frame16) > lpbuf[2])
2335 {
2336 /* We found the right frame */
2337 pFrame->frame32 = frame32;
2338 break;
2339 }
2340 frame32 = ((STACK16FRAME *)MapSL(frame32->frame16))->frame32;
2341 }
2342 RtlUnwind( &pFrame->frame32->frame, NULL, NULL, 0 );
2343
2344 context->Eip = lpbuf[0];
2345 context->SegCs = lpbuf[1];
2346 context->Esp = lpbuf[2] + 4 * sizeof(WORD) - sizeof(WORD) /*extra arg*/;
2347 context->Ebp = lpbuf[3];
2348 context->Esi = lpbuf[4];
2349 context->Edi = lpbuf[5];
2350 context->SegDs = lpbuf[6];
2351
2352 if (lpbuf[8] != context->SegSs)
2353 ERR("Switching stack segment with Throw() not supported; expect crash now\n" );
2354 }
2355
2356
2357 /*
2358 * 16-bit WOW routines (in KERNEL)
2359 */
2360
2361 /**********************************************************************
2362 * GetVDMPointer32W (KERNEL.516)
2363 */
2364 DWORD WINAPI GetVDMPointer32W16( SEGPTR vp, UINT16 fMode )
2365 {
2366 GlobalPageLock16(GlobalHandle16(SELECTOROF(vp)));
2367 return (DWORD)K32WOWGetVDMPointer( vp, 0, (DWORD)fMode );
2368 }
2369
2370 /***********************************************************************
2371 * LoadLibraryEx32W (KERNEL.513)
2372 */
2373 DWORD WINAPI LoadLibraryEx32W16( LPCSTR lpszLibFile, DWORD hFile, DWORD dwFlags )
2374 {
2375 HMODULE hModule;
2376 DWORD mutex_count;
2377 OFSTRUCT ofs;
2378 const char *p;
2379
2380 if (!lpszLibFile)
2381 {
2382 SetLastError(ERROR_INVALID_PARAMETER);
2383 return 0;
2384 }
2385
2386 /* if the file cannot be found, call LoadLibraryExA anyway, since it might be
2387 a builtin module. This case is handled in MODULE_LoadLibraryExA */
2388
2389 if ((p = strrchr( lpszLibFile, '.' )) && !strchr( p, '\\' )) /* got an extension */
2390 {
2391 if (OpenFile16( lpszLibFile, &ofs, OF_EXIST ) != HFILE_ERROR16)
2392 lpszLibFile = ofs.szPathName;
2393 }
2394 else
2395 {
2396 char buffer[MAX_PATH+4];
2397 strcpy( buffer, lpszLibFile );
2398 strcat( buffer, ".dll" );
2399 if (OpenFile16( buffer, &ofs, OF_EXIST ) != HFILE_ERROR16)
2400 lpszLibFile = ofs.szPathName;
2401 }
2402
2403 ReleaseThunkLock( &mutex_count );
2404 hModule = LoadLibraryExA( lpszLibFile, (HANDLE)hFile, dwFlags );
2405 RestoreThunkLock( mutex_count );
2406
2407 return (DWORD)hModule;
2408 }
2409
2410 /***********************************************************************
2411 * GetProcAddress32W (KERNEL.515)
2412 */
2413 DWORD WINAPI GetProcAddress32W16( DWORD hModule, LPCSTR lpszProc )
2414 {
2415 return (DWORD)GetProcAddress( (HMODULE)hModule, lpszProc );
2416 }
2417
2418 /***********************************************************************
2419 * FreeLibrary32W (KERNEL.514)
2420 */
2421 DWORD WINAPI FreeLibrary32W16( DWORD hLibModule )
2422 {
2423 BOOL retv;
2424 DWORD mutex_count;
2425
2426 ReleaseThunkLock( &mutex_count );
2427 retv = FreeLibrary( (HMODULE)hLibModule );
2428 RestoreThunkLock( mutex_count );
2429 return (DWORD)retv;
2430 }
2431
2432
2433 #define CPEX_DEST_STDCALL 0x00000000
2434 #define CPEX_DEST_CDECL 0x80000000
2435
2436 /**********************************************************************
2437 * WOW_CallProc32W
2438 */
2439 static DWORD WOW_CallProc32W16( FARPROC proc32, DWORD nrofargs, DWORD *args )
2440 {
2441 DWORD ret;
2442 DWORD mutex_count;
2443
2444 ReleaseThunkLock( &mutex_count );
2445 if (!proc32) ret = 0;
2446 else ret = call_entry_point( proc32, nrofargs & ~CPEX_DEST_CDECL, args );
2447 RestoreThunkLock( mutex_count );
2448
2449 TRACE("returns %08x\n",ret);
2450 return ret;
2451 }
2452
2453 /**********************************************************************
2454 * CallProc32W (KERNEL.517)
2455 */
2456 DWORD WINAPIV CallProc32W16( DWORD nrofargs, DWORD argconvmask, FARPROC proc32, VA_LIST16 valist )
2457 {
2458 DWORD args[32];
2459 unsigned int i;
2460
2461 TRACE("(%d,%d,%p args[",nrofargs,argconvmask,proc32);
2462
2463 for (i=0;i<nrofargs;i++)
2464 {
2465 if (argconvmask & (1<<i))
2466 {
2467 SEGPTR ptr = VA_ARG16( valist, SEGPTR );
2468 /* pascal convention, have to reverse the arguments order */
2469 args[nrofargs - i - 1] = (DWORD)MapSL(ptr);
2470 TRACE("%08x(%p),",ptr,MapSL(ptr));
2471 }
2472 else
2473 {
2474 DWORD arg = VA_ARG16( valist, DWORD );
2475 /* pascal convention, have to reverse the arguments order */
2476 args[nrofargs - i - 1] = arg;
2477 TRACE("%d,", arg);
2478 }
2479 }
2480 TRACE("])\n");
2481
2482 /* POP nrofargs DWORD arguments and 3 DWORD parameters */
2483 stack16_pop( (3 + nrofargs) * sizeof(DWORD) );
2484
2485 return WOW_CallProc32W16( proc32, nrofargs, args );
2486 }
2487
2488 /**********************************************************************
2489 * _CallProcEx32W (KERNEL.518)
2490 */
2491 DWORD WINAPIV CallProcEx32W16( DWORD nrofargs, DWORD argconvmask, FARPROC proc32, VA_LIST16 valist )
2492 {
2493 DWORD args[32];
2494 unsigned int i;
2495
2496 TRACE("(%d,%d,%p args[",nrofargs,argconvmask,proc32);
2497
2498 for (i=0;i<nrofargs;i++)
2499 {
2500 if (argconvmask & (1<<i))
2501 {
2502 SEGPTR ptr = VA_ARG16( valist, SEGPTR );
2503 args[i] = (DWORD)MapSL(ptr);
2504 TRACE("%08x(%p),",ptr,MapSL(ptr));
2505 }
2506 else
2507 {
2508 DWORD arg = VA_ARG16( valist, DWORD );
2509 args[i] = arg;
2510 TRACE("%d,", arg);
2511 }
2512 }
2513 TRACE("])\n");
2514 return WOW_CallProc32W16( proc32, nrofargs, args );
2515 }
2516
2517
2518 /**********************************************************************
2519 * WOW16Call (KERNEL.500)
2520 *
2521 * FIXME!!!
2522 *
2523 */
2524 DWORD WINAPIV WOW16Call(WORD x, WORD y, WORD z, VA_LIST16 args)
2525 {
2526 int i;
2527 DWORD calladdr;
2528 FIXME("(0x%04x,0x%04x,%d),calling (",x,y,z);
2529
2530 for (i=0;i<x/2;i++) {
2531 WORD a = VA_ARG16(args,WORD);
2532 DPRINTF("%04x ",a);
2533 }
2534 calladdr = VA_ARG16(args,DWORD);
2535 stack16_pop( 3*sizeof(WORD) + x + sizeof(DWORD) );
2536 DPRINTF(") calling address was 0x%08x\n",calladdr);
2537 return 0;
2538 }
2539
2540 #endif /* __i386__ */
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