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Fixed a couple of races with exiting threads in suspend_for_ptrace().
[wine/gsoc_dplay.git] / dlls / kernel / thunk.c
blob7dcb8f8187124c9d8664784f9ede92ef718bf121
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 */
22
23 #include "config.h"
24
25 #include <string.h>
26 #include <sys/types.h>
27 #include <stdio.h>
28 #ifdef HAVE_UNISTD_H
29 # include <unistd.h>
30 #endif
31
32 #include "windef.h"
33 #include "winbase.h"
34 #include "winerror.h"
35 #include "winternl.h"
36 #include "wine/winbase16.h"
37
38 #include "wine/debug.h"
39 #include "wine/library.h"
40 #include "flatthunk.h"
41 #include "module.h"
42 #include "miscemu.h"
43 #include "selectors.h"
44 #include "stackframe.h"
45 #include "task.h"
46
47 WINE_DEFAULT_DEBUG_CHANNEL(thunk);
48
49 #ifdef __i386__
50 extern void __wine_call_from_16_thunk();
51 #else
52 static void __wine_call_from_16_thunk() { }
53 #endif
54
55 /***********************************************************************
56 * *
57 * Win95 internal thunks *
58 * *
59 ***********************************************************************/
60
61 /***********************************************************************
62 * LogApiThk (KERNEL.423)
63 */
64 void WINAPI LogApiThk( LPSTR func )
65 {
66 TRACE( "%s\n", debugstr_a(func) );
67 }
68
69 /***********************************************************************
70 * LogApiThkLSF (KERNEL32.42)
71 *
72 * NOTE: needs to preserve all registers!
73 */
74 void WINAPI LogApiThkLSF( LPSTR func, CONTEXT86 *context )
75 {
76 TRACE( "%s\n", debugstr_a(func) );
77 }
78
79 /***********************************************************************
80 * LogApiThkSL (KERNEL32.44)
81 *
82 * NOTE: needs to preserve all registers!
83 */
84 void WINAPI LogApiThkSL( LPSTR func, CONTEXT86 *context )
85 {
86 TRACE( "%s\n", debugstr_a(func) );
87 }
88
89 /***********************************************************************
90 * LogCBThkSL (KERNEL32.47)
91 *
92 * NOTE: needs to preserve all registers!
93 */
94 void WINAPI LogCBThkSL( LPSTR func, CONTEXT86 *context )
95 {
96 TRACE( "%s\n", debugstr_a(func) );
97 }
98
99 /***********************************************************************
100 * Generates a FT_Prolog call.
101 *
102 * 0FB6D1 movzbl edx,cl
103 * 8B1495xxxxxxxx mov edx,[4*edx + targetTable]
104 * 68xxxxxxxx push FT_Prolog
105 * C3 lret
106 */
107 static void _write_ftprolog(LPBYTE relayCode ,DWORD *targetTable) {
108 LPBYTE x;
109
110 x = relayCode;
111 *x++ = 0x0f;*x++=0xb6;*x++=0xd1; /* movzbl edx,cl */
112 *x++ = 0x8B;*x++=0x14;*x++=0x95;*(DWORD**)x= targetTable;
113 x+=4; /* mov edx, [4*edx + targetTable] */
114 *x++ = 0x68; *(DWORD*)x = (DWORD)GetProcAddress(GetModuleHandleA("KERNEL32"),"FT_Prolog");
115 x+=4; /* push FT_Prolog */
116 *x++ = 0xC3; /* lret */
117 /* fill rest with 0xCC / int 3 */
118 }
119
120 /***********************************************************************
121 * _write_qtthunk (internal)
122 * Generates a QT_Thunk style call.
123 *
124 * 33C9 xor ecx, ecx
125 * 8A4DFC mov cl , [ebp-04]
126 * 8B148Dxxxxxxxx mov edx, [4*ecx + targetTable]
127 * B8yyyyyyyy mov eax, QT_Thunk
128 * FFE0 jmp eax
129 */
130 static void _write_qtthunk(
131 LPBYTE relayCode, /* [in] start of QT_Thunk stub */
132 DWORD *targetTable /* [in] start of thunk (for index lookup) */
133 ) {
134 LPBYTE x;
135
136 x = relayCode;
137 *x++ = 0x33;*x++=0xC9; /* xor ecx,ecx */
138 *x++ = 0x8A;*x++=0x4D;*x++=0xFC; /* movb cl,[ebp-04] */
139 *x++ = 0x8B;*x++=0x14;*x++=0x8D;*(DWORD**)x= targetTable;
140 x+=4; /* mov edx, [4*ecx + targetTable */
141 *x++ = 0xB8; *(DWORD*)x = (DWORD)GetProcAddress(GetModuleHandleA("KERNEL32"),"QT_Thunk");
142 x+=4; /* mov eax , QT_Thunk */
143 *x++ = 0xFF; *x++ = 0xE0; /* jmp eax */
144 /* should fill the rest of the 32 bytes with 0xCC */
145 }
146
147 /***********************************************************************
148 * _loadthunk
149 */
150 static LPVOID _loadthunk(LPCSTR module, LPCSTR func, LPCSTR module32,
151 struct ThunkDataCommon *TD32, DWORD checksum)
152 {
153 struct ThunkDataCommon *TD16;
154 HMODULE16 hmod;
155 int ordinal;
156
157 if ((hmod = LoadLibrary16(module)) <= 32)
158 {
159 ERR("(%s, %s, %s): Unable to load '%s', error %d\n",
160 module, func, module32, module, hmod);
161 return 0;
162 }
163
164 if ( !(ordinal = NE_GetOrdinal(hmod, func))
165 || !(TD16 = MapSL((SEGPTR)NE_GetEntryPointEx(hmod, ordinal, FALSE))))
166 {
167 ERR("Unable to find thunk data '%s' in %s, required by %s (conflicting/incorrect DLL versions !?).\n",
168 func, module, module32);
169 return 0;
170 }
171
172 if (TD32 && memcmp(TD16->magic, TD32->magic, 4))
173 {
174 ERR("(%s, %s, %s): Bad magic %c%c%c%c (should be %c%c%c%c)\n",
175 module, func, module32,
176 TD16->magic[0], TD16->magic[1], TD16->magic[2], TD16->magic[3],
177 TD32->magic[0], TD32->magic[1], TD32->magic[2], TD32->magic[3]);
178 return 0;
179 }
180
181 if (TD32 && TD16->checksum != TD32->checksum)
182 {
183 ERR("(%s, %s, %s): Wrong checksum %08lx (should be %08lx)\n",
184 module, func, module32, TD16->checksum, TD32->checksum);
185 return 0;
186 }
187
188 if (!TD32 && checksum && checksum != *(LPDWORD)TD16)
189 {
190 ERR("(%s, %s, %s): Wrong checksum %08lx (should be %08lx)\n",
191 module, func, module32, *(LPDWORD)TD16, checksum);
192 return 0;
193 }
194
195 return TD16;
196 }
197
198 /***********************************************************************
199 * GetThunkStuff (KERNEL32.53)
200 */
201 LPVOID WINAPI GetThunkStuff(LPSTR module, LPSTR func)
202 {
203 return _loadthunk(module, func, "<kernel>", NULL, 0L);
204 }
205
206 /***********************************************************************
207 * GetThunkBuff (KERNEL32.52)
208 * Returns a pointer to ThkBuf in the 16bit library SYSTHUNK.DLL.
209 */
210 LPVOID WINAPI GetThunkBuff(void)
211 {
212 return GetThunkStuff("SYSTHUNK.DLL", "ThkBuf");
213 }
214
215 /***********************************************************************
216 * ThunkConnect32 (KERNEL32.@)
217 * Connects a 32bit and a 16bit thunkbuffer.
218 */
219 UINT WINAPI ThunkConnect32(
220 struct ThunkDataCommon *TD, /* [in/out] thunkbuffer */
221 LPSTR thunkfun16, /* [in] win16 thunkfunction */
222 LPSTR module16, /* [in] name of win16 dll */
223 LPSTR module32, /* [in] name of win32 dll */
224 HMODULE hmod32, /* [in] hmodule of win32 dll */
225 DWORD dwReason /* [in] initialisation argument */
226 ) {
227 BOOL directionSL;
228
229 if (!strncmp(TD->magic, "SL01", 4))
230 {
231 directionSL = TRUE;
232
233 TRACE("SL01 thunk %s (%lx) <- %s (%s), Reason: %ld\n",
234 module32, (DWORD)TD, module16, thunkfun16, dwReason);
235 }
236 else if (!strncmp(TD->magic, "LS01", 4))
237 {
238 directionSL = FALSE;
239
240 TRACE("LS01 thunk %s (%lx) -> %s (%s), Reason: %ld\n",
241 module32, (DWORD)TD, module16, thunkfun16, dwReason);
242 }
243 else
244 {
245 ERR("Invalid magic %c%c%c%c\n",
246 TD->magic[0], TD->magic[1], TD->magic[2], TD->magic[3]);
247 return 0;
248 }
249
250 switch (dwReason)
251 {
252 case DLL_PROCESS_ATTACH:
253 {
254 struct ThunkDataCommon *TD16;
255 if (!(TD16 = _loadthunk(module16, thunkfun16, module32, TD, 0L)))
256 return 0;
257
258 if (directionSL)
259 {
260 struct ThunkDataSL32 *SL32 = (struct ThunkDataSL32 *)TD;
261 struct ThunkDataSL16 *SL16 = (struct ThunkDataSL16 *)TD16;
262 struct SLTargetDB *tdb;
263
264 if (SL16->fpData == NULL)
265 {
266 ERR("ThunkConnect16 was not called!\n");
267 return 0;
268 }
269
270 SL32->data = SL16->fpData;
271
272 tdb = HeapAlloc(GetProcessHeap(), 0, sizeof(*tdb));
273 tdb->process = GetCurrentProcessId();
274 tdb->targetTable = (DWORD *)(thunkfun16 + SL32->offsetTargetTable);
275
276 tdb->next = SL32->data->targetDB; /* FIXME: not thread-safe! */
277 SL32->data->targetDB = tdb;
278
279 TRACE("Process %08lx allocated TargetDB entry for ThunkDataSL %08lx\n",
280 GetCurrentProcessId(), (DWORD)SL32->data);
281 }
282 else
283 {
284 struct ThunkDataLS32 *LS32 = (struct ThunkDataLS32 *)TD;
285 struct ThunkDataLS16 *LS16 = (struct ThunkDataLS16 *)TD16;
286
287 LS32->targetTable = MapSL(LS16->targetTable);
288
289 /* write QT_Thunk and FT_Prolog stubs */
290 _write_qtthunk ((LPBYTE)TD + LS32->offsetQTThunk, LS32->targetTable);
291 _write_ftprolog((LPBYTE)TD + LS32->offsetFTProlog, LS32->targetTable);
292 }
293 break;
294 }
295
296 case DLL_PROCESS_DETACH:
297 /* FIXME: cleanup */
298 break;
299 }
300
301 return 1;
302 }
303
304 /**********************************************************************
305 * QT_Thunk (KERNEL32.@)
306 *
307 * The target address is in EDX.
308 * The 16bit arguments start at ESP.
309 * The number of 16bit argument bytes is EBP-ESP-0x40 (64 Byte thunksetup).
310 * So the stack layout is 16bit argument bytes and then the 64 byte
311 * scratch buffer.
312 * The scratch buffer is used as work space by Windows' QT_Thunk
313 * function.
314 * As the programs unfortunately don't always provide a fixed size
315 * scratch buffer (danger, stack corruption ahead !!), we simply resort
316 * to copying over the whole EBP-ESP range to the 16bit stack
317 * (as there's no way to safely figure out the param count
318 * due to this misbehaviour of some programs).
319 * [ok]
320 *
321 * See DDJ article 9614c for a very good description of QT_Thunk (also
322 * available online !).
323 *
324 * FIXME: DDJ talks of certain register usage rules; I'm not sure
325 * whether we cover this 100%.
326 */
327 void WINAPI QT_Thunk( CONTEXT86 *context )
328 {
329 CONTEXT86 context16;
330 DWORD argsize;
331
332 memcpy(&context16,context,sizeof(context16));
333
334 context16.SegCs = HIWORD(context->Edx);
335 context16.Eip = LOWORD(context->Edx);
336 /* point EBP to the STACK16FRAME on the stack
337 * for the call_to_16 to set up the register content on calling */
338 context16.Ebp = OFFSETOF( NtCurrentTeb()->cur_stack )
339 + (WORD)&((STACK16FRAME*)0)->bp;
340
341 /*
342 * used to be (problematic):
343 * argsize = context->Ebp - context->Esp - 0x40;
344 * due to some programs abusing the API, we better assume the full
345 * EBP - ESP range for copying instead: */
346 argsize = context->Ebp - context->Esp;
347
348 /* ok, too much is insane; let's limit param count a bit again */
349 if (argsize > 64)
350 argsize = 64; /* 32 WORDs */
351
352 memcpy( (LPBYTE)CURRENT_STACK16 - argsize,
353 (LPBYTE)context->Esp, argsize );
354
355 /* let's hope call_to_16 won't mind getting called with such a
356 * potentially bogus large number of arguments */
357 wine_call_to_16_regs_short( &context16, argsize );
358 context->Eax = context16.Eax;
359 context->Edx = context16.Edx;
360 context->Ecx = context16.Ecx;
361
362 /* make sure to update the Win32 ESP, too, in order to throw away
363 * the number of parameters that the Win16 function
364 * accepted (that it popped from the corresponding Win16 stack) */
365 context->Esp += LOWORD(context16.Esp) -
366 ( OFFSETOF( NtCurrentTeb()->cur_stack ) - argsize );
367 }
368
369
370 /**********************************************************************
371 * FT_Prolog (KERNEL32.@)
372 *
373 * The set of FT_... thunk routines is used instead of QT_Thunk,
374 * if structures have to be converted from 32-bit to 16-bit
375 * (change of member alignment, conversion of members).
376 *
377 * The thunk function (as created by the thunk compiler) calls
378 * FT_Prolog at the beginning, to set up a stack frame and
379 * allocate a 64 byte buffer on the stack.
380 * The input parameters (target address and some flags) are
381 * saved for later use by FT_Thunk.
382 *
383 * Input: EDX 16-bit target address (SEGPTR)
384 * CX bits 0..7 target number (in target table)
385 * bits 8..9 some flags (unclear???)
386 * bits 10..15 number of DWORD arguments
387 *
388 * Output: A new stackframe is created, and a 64 byte buffer
389 * allocated on the stack. The layout of the stack
390 * on return is as follows:
391 *
392 * (ebp+4) return address to caller of thunk function
393 * (ebp) old EBP
394 * (ebp-4) saved EBX register of caller
395 * (ebp-8) saved ESI register of caller
396 * (ebp-12) saved EDI register of caller
397 * (ebp-16) saved ECX register, containing flags
398 * (ebp-20) bitmap containing parameters that are to be converted
399 * by FT_Thunk; it is initialized to 0 by FT_Prolog and
400 * filled in by the thunk code before calling FT_Thunk
401 * (ebp-24)
402 * ... (unclear)
403 * (ebp-44)
404 * (ebp-48) saved EAX register of caller (unclear, never restored???)
405 * (ebp-52) saved EDX register, containing 16-bit thunk target
406 * (ebp-56)
407 * ... (unclear)
408 * (ebp-64)
409 *
410 * ESP is EBP-64 after return.
411 *
412 */
413
414 void WINAPI FT_Prolog( CONTEXT86 *context )
415 {
416 /* Build stack frame */
417 stack32_push(context, context->Ebp);
418 context->Ebp = context->Esp;
419
420 /* Allocate 64-byte Thunk Buffer */
421 context->Esp -= 64;
422 memset((char *)context->Esp, '\0', 64);
423
424 /* Store Flags (ECX) and Target Address (EDX) */
425 /* Save other registers to be restored later */
426 *(DWORD *)(context->Ebp - 4) = context->Ebx;
427 *(DWORD *)(context->Ebp - 8) = context->Esi;
428 *(DWORD *)(context->Ebp - 12) = context->Edi;
429 *(DWORD *)(context->Ebp - 16) = context->Ecx;
430
431 *(DWORD *)(context->Ebp - 48) = context->Eax;
432 *(DWORD *)(context->Ebp - 52) = context->Edx;
433 }
434
435 /**********************************************************************
436 * FT_Thunk (KERNEL32.@)
437 *
438 * This routine performs the actual call to 16-bit code,
439 * similar to QT_Thunk. The differences are:
440 * - The call target is taken from the buffer created by FT_Prolog
441 * - Those arguments requested by the thunk code (by setting the
442 * corresponding bit in the bitmap at EBP-20) are converted
443 * from 32-bit pointers to segmented pointers (those pointers
444 * are guaranteed to point to structures copied to the stack
445 * by the thunk code, so we always use the 16-bit stack selector
446 * for those addresses).
447 *
448 * The bit #i of EBP-20 corresponds here to the DWORD starting at
449 * ESP+4 + 2*i.
450 *
451 * FIXME: It is unclear what happens if there are more than 32 WORDs
452 * of arguments, so that the single DWORD bitmap is no longer
453 * sufficient ...
454 */
455
456 void WINAPI FT_Thunk( CONTEXT86 *context )
457 {
458 DWORD mapESPrelative = *(DWORD *)(context->Ebp - 20);
459 DWORD callTarget = *(DWORD *)(context->Ebp - 52);
460
461 CONTEXT86 context16;
462 DWORD i, argsize;
463 LPBYTE newstack, oldstack;
464
465 memcpy(&context16,context,sizeof(context16));
466
467 context16.SegCs = HIWORD(callTarget);
468 context16.Eip = LOWORD(callTarget);
469 context16.Ebp = OFFSETOF( NtCurrentTeb()->cur_stack )
470 + (WORD)&((STACK16FRAME*)0)->bp;
471
472 argsize = context->Ebp-context->Esp-0x40;
473 newstack = (LPBYTE)CURRENT_STACK16 - argsize;
474 oldstack = (LPBYTE)context->Esp;
475
476 memcpy( newstack, oldstack, argsize );
477
478 for (i = 0; i < 32; i++) /* NOTE: What about > 32 arguments? */
479 if (mapESPrelative & (1 << i))
480 {
481 SEGPTR *arg = (SEGPTR *)(newstack + 2*i);
482 *arg = MAKESEGPTR(SELECTOROF(NtCurrentTeb()->cur_stack),
483 OFFSETOF(NtCurrentTeb()->cur_stack) - argsize
484 + (*(LPBYTE *)arg - oldstack));
485 }
486
487 wine_call_to_16_regs_short( &context16, argsize );
488 context->Eax = context16.Eax;
489 context->Edx = context16.Edx;
490 context->Ecx = context16.Ecx;
491
492 context->Esp += LOWORD(context16.Esp) -
493 ( OFFSETOF( NtCurrentTeb()->cur_stack ) - argsize );
494
495 /* Copy modified buffers back to 32-bit stack */
496 memcpy( oldstack, newstack, argsize );
497 }
498
499 /**********************************************************************
500 * FT_ExitNN (KERNEL32.218 - 232)
501 *
502 * One of the FT_ExitNN functions is called at the end of the thunk code.
503 * It removes the stack frame created by FT_Prolog, moves the function
504 * return from EBX to EAX (yes, FT_Thunk did use EAX for the return
505 * value, but the thunk code has moved it from EAX to EBX in the
506 * meantime ... :-), restores the caller's EBX, ESI, and EDI registers,
507 * and perform a return to the CALLER of the thunk code (while removing
508 * the given number of arguments from the caller's stack).
509 */
510
511 static void FT_Exit(CONTEXT86 *context, int nPopArgs)
512 {
513 /* Return value is in EBX */
514 context->Eax = context->Ebx;
515
516 /* Restore EBX, ESI, and EDI registers */
517 context->Ebx = *(DWORD *)(context->Ebp - 4);
518 context->Esi = *(DWORD *)(context->Ebp - 8);
519 context->Edi = *(DWORD *)(context->Ebp - 12);
520
521 /* Clean up stack frame */
522 context->Esp = context->Ebp;
523 context->Ebp = stack32_pop(context);
524
525 /* Pop return address to CALLER of thunk code */
526 context->Eip = stack32_pop(context);
527 /* Remove arguments */
528 context->Esp += nPopArgs;
529 }
530
531 /***********************************************************************
532 * FT_Exit0 (KERNEL32.@)
533 */
534 void WINAPI FT_Exit0 (CONTEXT86 *context) { FT_Exit(context, 0); }
535
536 /***********************************************************************
537 * FT_Exit4 (KERNEL32.@)
538 */
539 void WINAPI FT_Exit4 (CONTEXT86 *context) { FT_Exit(context, 4); }
540
541 /***********************************************************************
542 * FT_Exit8 (KERNEL32.@)
543 */
544 void WINAPI FT_Exit8 (CONTEXT86 *context) { FT_Exit(context, 8); }
545
546 /***********************************************************************
547 * FT_Exit12 (KERNEL32.@)
548 */
549 void WINAPI FT_Exit12(CONTEXT86 *context) { FT_Exit(context, 12); }
550
551 /***********************************************************************
552 * FT_Exit16 (KERNEL32.@)
553 */
554 void WINAPI FT_Exit16(CONTEXT86 *context) { FT_Exit(context, 16); }
555
556 /***********************************************************************
557 * FT_Exit20 (KERNEL32.@)
558 */
559 void WINAPI FT_Exit20(CONTEXT86 *context) { FT_Exit(context, 20); }
560
561 /***********************************************************************
562 * FT_Exit24 (KERNEL32.@)
563 */
564 void WINAPI FT_Exit24(CONTEXT86 *context) { FT_Exit(context, 24); }
565
566 /***********************************************************************
567 * FT_Exit28 (KERNEL32.@)
568 */
569 void WINAPI FT_Exit28(CONTEXT86 *context) { FT_Exit(context, 28); }
570
571 /***********************************************************************
572 * FT_Exit32 (KERNEL32.@)
573 */
574 void WINAPI FT_Exit32(CONTEXT86 *context) { FT_Exit(context, 32); }
575
576 /***********************************************************************
577 * FT_Exit36 (KERNEL32.@)
578 */
579 void WINAPI FT_Exit36(CONTEXT86 *context) { FT_Exit(context, 36); }
580
581 /***********************************************************************
582 * FT_Exit40 (KERNEL32.@)
583 */
584 void WINAPI FT_Exit40(CONTEXT86 *context) { FT_Exit(context, 40); }
585
586 /***********************************************************************
587 * FT_Exit44 (KERNEL32.@)
588 */
589 void WINAPI FT_Exit44(CONTEXT86 *context) { FT_Exit(context, 44); }
590
591 /***********************************************************************
592 * FT_Exit48 (KERNEL32.@)
593 */
594 void WINAPI FT_Exit48(CONTEXT86 *context) { FT_Exit(context, 48); }
595
596 /***********************************************************************
597 * FT_Exit52 (KERNEL32.@)
598 */
599 void WINAPI FT_Exit52(CONTEXT86 *context) { FT_Exit(context, 52); }
600
601 /***********************************************************************
602 * FT_Exit56 (KERNEL32.@)
603 */
604 void WINAPI FT_Exit56(CONTEXT86 *context) { FT_Exit(context, 56); }
605
606 /***********************************************************************
607 * ThunkInitLS (KERNEL32.43)
608 * A thunkbuffer link routine
609 * The thunkbuf looks like:
610 *
611 * 00: DWORD length ? don't know exactly
612 * 04: SEGPTR ptr ? where does it point to?
613 * The pointer ptr is written into the first DWORD of 'thunk'.
614 * (probably correctly implemented)
615 * [ok probably]
616 * RETURNS
617 * segmented pointer to thunk?
618 */
619 DWORD WINAPI ThunkInitLS(
620 LPDWORD thunk, /* [in] win32 thunk */
621 LPCSTR thkbuf, /* [in] thkbuffer name in win16 dll */
622 DWORD len, /* [in] thkbuffer length */
623 LPCSTR dll16, /* [in] name of win16 dll */
624 LPCSTR dll32 /* [in] name of win32 dll (FIXME: not used?) */
625 ) {
626 LPDWORD addr;
627
628 if (!(addr = _loadthunk( dll16, thkbuf, dll32, NULL, len )))
629 return 0;
630
631 if (!addr[1])
632 return 0;
633 *(DWORD*)thunk = addr[1];
634
635 return addr[1];
636 }
637
638 /***********************************************************************
639 * Common32ThkLS (KERNEL32.45)
640 *
641 * This is another 32->16 thunk, independent of the QT_Thunk/FT_Thunk
642 * style thunks. The basic difference is that the parameter conversion
643 * is done completely on the *16-bit* side here. Thus we do not call
644 * the 16-bit target directly, but call a common entry point instead.
645 * This entry function then calls the target according to the target
646 * number passed in the DI register.
647 *
648 * Input: EAX SEGPTR to the common 16-bit entry point
649 * CX offset in thunk table (target number * 4)
650 * DX error return value if execution fails (unclear???)
651 * EDX.HI number of DWORD parameters
652 *
653 * (Note that we need to move the thunk table offset from CX to DI !)
654 *
655 * The called 16-bit stub expects its stack to look like this:
656 * ...
657 * (esp+40) 32-bit arguments
658 * ...
659 * (esp+8) 32 byte of stack space available as buffer
660 * (esp) 8 byte return address for use with 0x66 lret
661 *
662 * The called 16-bit stub uses a 0x66 lret to return to 32-bit code,
663 * and uses the EAX register to return a DWORD return value.
664 * Thus we need to use a special assembly glue routine
665 * (CallRegisterLongProc instead of CallRegisterShortProc).
666 *
667 * Finally, we return to the caller, popping the arguments off
668 * the stack. The number of arguments to be popped is returned
669 * in the BL register by the called 16-bit routine.
670 *
671 */
672 void WINAPI Common32ThkLS( CONTEXT86 *context )
673 {
674 CONTEXT86 context16;
675 DWORD argsize;
676
677 memcpy(&context16,context,sizeof(context16));
678
679 context16.Edi = LOWORD(context->Ecx);
680 context16.SegCs = HIWORD(context->Eax);
681 context16.Eip = LOWORD(context->Eax);
682 context16.Ebp = OFFSETOF( NtCurrentTeb()->cur_stack )
683 + (WORD)&((STACK16FRAME*)0)->bp;
684
685 argsize = HIWORD(context->Edx) * 4;
686
687 /* FIXME: hack for stupid USER32 CallbackGlueLS routine */
688 if (context->Edx == context->Eip)
689 argsize = 6 * 4;
690
691 memcpy( (LPBYTE)CURRENT_STACK16 - argsize,
692 (LPBYTE)context->Esp, argsize );
693
694 wine_call_to_16_regs_long(&context16, argsize + 32);
695 context->Eax = context16.Eax;
696
697 /* Clean up caller's stack frame */
698 context->Esp += BL_reg(&context16);
699 }
700
701 /***********************************************************************
702 * OT_32ThkLSF (KERNEL32.40)
703 *
704 * YET Another 32->16 thunk. The difference to Common32ThkLS is that
705 * argument processing is done on both the 32-bit and the 16-bit side:
706 * The 32-bit side prepares arguments, copying them onto the stack.
707 *
708 * When this routine is called, the first word on the stack is the
709 * number of argument bytes prepared by the 32-bit code, and EDX
710 * contains the 16-bit target address.
711 *
712 * The called 16-bit routine is another relaycode, doing further
713 * argument processing and then calling the real 16-bit target
714 * whose address is stored at [bp-04].
715 *
716 * The call proceeds using a normal CallRegisterShortProc.
717 * After return from the 16-bit relaycode, the arguments need
718 * to be copied *back* to the 32-bit stack, since the 32-bit
719 * relaycode processes output parameters.
720 *
721 * Note that we copy twice the number of arguments, since some of the
722 * 16-bit relaycodes in SYSTHUNK.DLL directly access the original
723 * arguments of the caller!
724 *
725 * (Note that this function seems only to be used for
726 * OLECLI32 -> OLECLI and OLESVR32 -> OLESVR thunking.)
727 */
728 void WINAPI OT_32ThkLSF( CONTEXT86 *context )
729 {
730 CONTEXT86 context16;
731 DWORD argsize;
732
733 memcpy(&context16,context,sizeof(context16));
734
735 context16.SegCs = HIWORD(context->Edx);
736 context16.Eip = LOWORD(context->Edx);
737 context16.Ebp = OFFSETOF( NtCurrentTeb()->cur_stack )
738 + (WORD)&((STACK16FRAME*)0)->bp;
739
740 argsize = 2 * *(WORD *)context->Esp + 2;
741
742 memcpy( (LPBYTE)CURRENT_STACK16 - argsize,
743 (LPBYTE)context->Esp, argsize );
744
745 wine_call_to_16_regs_short(&context16, argsize);
746 context->Eax = context16.Eax;
747 context->Edx = context16.Edx;
748
749 /* Copy modified buffers back to 32-bit stack */
750 memcpy( (LPBYTE)context->Esp,
751 (LPBYTE)CURRENT_STACK16 - argsize, argsize );
752
753 context->Esp += LOWORD(context16.Esp) -
754 ( OFFSETOF( NtCurrentTeb()->cur_stack ) - argsize );
755 }
756
757 /***********************************************************************
758 * ThunkInitLSF (KERNEL32.41)
759 * A thunk setup routine.
760 * Expects a pointer to a preinitialized thunkbuffer in the first argument
761 * looking like:
762 *| 00..03: unknown (pointer, check _41, _43, _46)
763 *| 04: EB1E jmp +0x20
764 *|
765 *| 06..23: unknown (space for replacement code, check .90)
766 *|
767 *| 24:>E800000000 call offset 29
768 *| 29:>58 pop eax ( target of call )
769 *| 2A: 2D25000000 sub eax,0x00000025 ( now points to offset 4 )
770 *| 2F: BAxxxxxxxx mov edx,xxxxxxxx
771 *| 34: 68yyyyyyyy push KERNEL32.90
772 *| 39: C3 ret
773 *|
774 *| 3A: EB1E jmp +0x20
775 *| 3E ... 59: unknown (space for replacement code?)
776 *| 5A: E8xxxxxxxx call <32bitoffset xxxxxxxx>
777 *| 5F: 5A pop edx
778 *| 60: 81EA25xxxxxx sub edx, 0x25xxxxxx
779 *| 66: 52 push edx
780 *| 67: 68xxxxxxxx push xxxxxxxx
781 *| 6C: 68yyyyyyyy push KERNEL32.89
782 *| 71: C3 ret
783 *| 72: end?
784 * This function checks if the code is there, and replaces the yyyyyyyy entries
785 * by the functionpointers.
786 * The thunkbuf looks like:
787 *
788 *| 00: DWORD length ? don't know exactly
789 *| 04: SEGPTR ptr ? where does it point to?
790 * The segpointer ptr is written into the first DWORD of 'thunk'.
791 * [ok probably]
792 * RETURNS
793 * unclear, pointer to win16 thkbuffer?
794 */
795 LPVOID WINAPI ThunkInitLSF(
796 LPBYTE thunk, /* [in] win32 thunk */
797 LPCSTR thkbuf, /* [in] thkbuffer name in win16 dll */
798 DWORD len, /* [in] length of thkbuffer */
799 LPCSTR dll16, /* [in] name of win16 dll */
800 LPCSTR dll32 /* [in] name of win32 dll */
801 ) {
802 HMODULE hkrnl32 = GetModuleHandleA("KERNEL32");
803 LPDWORD addr,addr2;
804
805 /* FIXME: add checks for valid code ... */
806 /* write pointers to kernel32.89 and kernel32.90 (+ordinal base of 1) */
807 *(DWORD*)(thunk+0x35) = (DWORD)GetProcAddress(hkrnl32,(LPSTR)90);
808 *(DWORD*)(thunk+0x6D) = (DWORD)GetProcAddress(hkrnl32,(LPSTR)89);
809
810
811 if (!(addr = _loadthunk( dll16, thkbuf, dll32, NULL, len )))
812 return 0;
813
814 addr2 = MapSL(addr[1]);
815 if (HIWORD(addr2))
816 *(DWORD*)thunk = (DWORD)addr2;
817
818 return addr2;
819 }
820
821 /***********************************************************************
822 * FT_PrologPrime (KERNEL32.89)
823 *
824 * This function is called from the relay code installed by
825 * ThunkInitLSF. It replaces the location from where it was
826 * called by a standard FT_Prolog call stub (which is 'primed'
827 * by inserting the correct target table pointer).
828 * Finally, it calls that stub.
829 *
830 * Input: ECX target number + flags (passed through to FT_Prolog)
831 * (ESP) offset of location where target table pointer
832 * is stored, relative to the start of the relay code
833 * (ESP+4) pointer to start of relay code
834 * (this is where the FT_Prolog call stub gets written to)
835 *
836 * Note: The two DWORD arguments get popped off the stack.
837 *
838 */
839 void WINAPI FT_PrologPrime( CONTEXT86 *context )
840 {
841 DWORD targetTableOffset;
842 LPBYTE relayCode;
843
844 /* Compensate for the fact that the Wine register relay code thought
845 we were being called, although we were in fact jumped to */
846 context->Esp -= 4;
847
848 /* Write FT_Prolog call stub */
849 targetTableOffset = stack32_pop(context);
850 relayCode = (LPBYTE)stack32_pop(context);
851 _write_ftprolog( relayCode, *(DWORD **)(relayCode+targetTableOffset) );
852
853 /* Jump to the call stub just created */
854 context->Eip = (DWORD)relayCode;
855 }
856
857 /***********************************************************************
858 * QT_ThunkPrime (KERNEL32.90)
859 *
860 * This function corresponds to FT_PrologPrime, but installs a
861 * call stub for QT_Thunk instead.
862 *
863 * Input: (EBP-4) target number (passed through to QT_Thunk)
864 * EDX target table pointer location offset
865 * EAX start of relay code
866 *
867 */
868 void WINAPI QT_ThunkPrime( CONTEXT86 *context )
869 {
870 DWORD targetTableOffset;
871 LPBYTE relayCode;
872
873 /* Compensate for the fact that the Wine register relay code thought
874 we were being called, although we were in fact jumped to */
875 context->Esp -= 4;
876
877 /* Write QT_Thunk call stub */
878 targetTableOffset = context->Edx;
879 relayCode = (LPBYTE)context->Eax;
880 _write_qtthunk( relayCode, *(DWORD **)(relayCode+targetTableOffset) );
881
882 /* Jump to the call stub just created */
883 context->Eip = (DWORD)relayCode;
884 }
885
886 /***********************************************************************
887 * ThunkInitSL (KERNEL32.46)
888 * Another thunkbuf link routine.
889 * The start of the thunkbuf looks like this:
890 * 00: DWORD length
891 * 04: SEGPTR address for thunkbuffer pointer
892 * [ok probably]
893 */
894 VOID WINAPI ThunkInitSL(
895 LPBYTE thunk, /* [in] start of thunkbuffer */
896 LPCSTR thkbuf, /* [in] name/ordinal of thunkbuffer in win16 dll */
897 DWORD len, /* [in] length of thunkbuffer */
898 LPCSTR dll16, /* [in] name of win16 dll containing the thkbuf */
899 LPCSTR dll32 /* [in] win32 dll. FIXME: strange, unused */
900 ) {
901 LPDWORD addr;
902
903 if (!(addr = _loadthunk( dll16, thkbuf, dll32, NULL, len )))
904 return;
905
906 *(DWORD*)MapSL(addr[1]) = (DWORD)thunk;
907 }
908
909 /**********************************************************************
910 * SSInit (KERNEL.700)
911 * RETURNS
912 * TRUE for success.
913 */
914 BOOL WINAPI SSInit16()
915 {
916 return TRUE;
917 }
918
919 /**********************************************************************
920 * SSOnBigStack (KERNEL32.87)
921 * Check if thunking is initialized (ss selector set up etc.)
922 * We do that differently, so just return TRUE.
923 * [ok]
924 * RETURNS
925 * TRUE for success.
926 */
927 BOOL WINAPI SSOnBigStack()
928 {
929 TRACE("Yes, thunking is initialized\n");
930 return TRUE;
931 }
932
933 /**********************************************************************
934 * SSConfirmSmallStack (KERNEL.704)
935 *
936 * Abort if not on small stack.
937 *
938 * This must be a register routine as it has to preserve *all* registers.
939 */
940 void WINAPI SSConfirmSmallStack( CONTEXT86 *context )
941 {
942 /* We are always on the small stack while in 16-bit code ... */
943 }
944
945 /**********************************************************************
946 * SSCall (KERNEL32.88)
947 * One of the real thunking functions. This one seems to be for 32<->32
948 * thunks. It should probably be capable of crossing processboundaries.
949 *
950 * And YES, I've seen nr=48 (somewhere in the Win95 32<->16 OLE coupling)
951 * [ok]
952 */
953 DWORD WINAPIV SSCall(
954 DWORD nr, /* [in] number of argument bytes */
955 DWORD flags, /* [in] FIXME: flags ? */
956 FARPROC fun, /* [in] function to call */
957 ... /* [in/out] arguments */
958 ) {
959 DWORD i,ret;
960 DWORD *args = ((DWORD *)&fun) + 1;
961
962 if(TRACE_ON(thunk))
963 {
964 DPRINTF("(%ld,0x%08lx,%p,[",nr,flags,fun);
965 for (i=0;i<nr/4;i++)
966 DPRINTF("0x%08lx,",args[i]);
967 DPRINTF("])\n");
968 }
969 switch (nr) {
970 case 0: ret = fun();
971 break;
972 case 4: ret = fun(args[0]);
973 break;
974 case 8: ret = fun(args[0],args[1]);
975 break;
976 case 12: ret = fun(args[0],args[1],args[2]);
977 break;
978 case 16: ret = fun(args[0],args[1],args[2],args[3]);
979 break;
980 case 20: ret = fun(args[0],args[1],args[2],args[3],args[4]);
981 break;
982 case 24: ret = fun(args[0],args[1],args[2],args[3],args[4],args[5]);
983 break;
984 case 28: ret = fun(args[0],args[1],args[2],args[3],args[4],args[5],args[6]);
985 break;
986 case 32: ret = fun(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7]);
987 break;
988 case 36: ret = fun(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8]);
989 break;
990 case 40: ret = fun(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8],args[9]);
991 break;
992 case 44: ret = fun(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8],args[9],args[10]);
993 break;
994 case 48: ret = fun(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8],args[9],args[10],args[11]);
995 break;
996 default:
997 WARN("Unsupported nr of arguments, %ld\n",nr);
998 ret = 0;
999 break;
1000
1001 }
1002 TRACE(" returning %ld ...\n",ret);
1003 return ret;
1004 }
1005
1006 /**********************************************************************
1007 * W32S_BackTo32 (KERNEL32.51)
1008 */
1009 void WINAPI W32S_BackTo32( CONTEXT86 *context )
1010 {
1011 LPDWORD stack = (LPDWORD)context->Esp;
1012 FARPROC proc = (FARPROC)context->Eip;
1013
1014 context->Eax = proc( stack[1], stack[2], stack[3], stack[4], stack[5],
1015 stack[6], stack[7], stack[8], stack[9], stack[10] );
1016
1017 context->Eip = stack32_pop(context);
1018 }
1019
1020 /**********************************************************************
1021 * AllocSLCallback (KERNEL32.@)
1022 *
1023 * NOTES
1024 * Win95 uses some structchains for callbacks. It allocates them
1025 * in blocks of 100 entries, size 32 bytes each, layout:
1026 * blockstart:
1027 *| 0: PTR nextblockstart
1028 *| 4: entry *first;
1029 *| 8: WORD sel ( start points to blockstart)
1030 *| A: WORD unknown
1031 * 100xentry:
1032 *| 00..17: Code
1033 *| 18: PDB *owning_process;
1034 *| 1C: PTR blockstart
1035 *
1036 * We ignore this for now. (Just a note for further developers)
1037 * FIXME: use this method, so we don't waste selectors...
1038 *
1039 * Following code is then generated by AllocSLCallback. The code is 16 bit, so
1040 * the 0x66 prefix switches from word->long registers.
1041 *
1042 *| 665A pop edx
1043 *| 6668x arg2 x pushl <arg2>
1044 *| 6652 push edx
1045 *| EAx arg1 x jmpf <arg1>
1046 *
1047 * returns the startaddress of this thunk.
1048 *
1049 * Note, that they look very similar to the ones allocates by THUNK_Alloc.
1050 * RETURNS
1051 * A segmented pointer to the start of the thunk
1052 */
1053 DWORD WINAPI
1054 AllocSLCallback(
1055 DWORD finalizer, /* [in] Finalizer function */
1056 DWORD callback /* [in] Callback function */
1057 ) {
1058 LPBYTE x,thunk = HeapAlloc( GetProcessHeap(), 0, 32 );
1059 WORD sel;
1060
1061 x=thunk;
1062 *x++=0x66;*x++=0x5a; /* popl edx */
1063 *x++=0x66;*x++=0x68;*(DWORD*)x=finalizer;x+=4; /* pushl finalizer */
1064 *x++=0x66;*x++=0x52; /* pushl edx */
1065 *x++=0xea;*(DWORD*)x=callback;x+=4; /* jmpf callback */
1066
1067 *(DWORD*)(thunk+18) = GetCurrentProcessId();
1068
1069 sel = SELECTOR_AllocBlock( thunk, 32, WINE_LDT_FLAGS_CODE );
1070 return (sel<<16)|0;
1071 }
1072
1073 /**********************************************************************
1074 * FreeSLCallback (KERNEL32.@)
1075 * Frees the specified 16->32 callback
1076 */
1077 void WINAPI
1078 FreeSLCallback(
1079 DWORD x /* [in] 16 bit callback (segmented pointer?) */
1080 ) {
1081 FIXME("(0x%08lx): stub\n",x);
1082 }
1083
1084
1085 /**********************************************************************
1086 * GetTEBSelectorFS (KERNEL.475)
1087 * Set the 16-bit %fs to the 32-bit %fs (current TEB selector)
1088 */
1089 void WINAPI GetTEBSelectorFS16(void)
1090 {
1091 CURRENT_STACK16->fs = wine_get_fs();
1092 }
1093
1094 /**********************************************************************
1095 * IsPeFormat (KERNEL.431)
1096 *
1097 * Determine if a file is a PE format executable.
1098 *
1099 * RETURNS
1100 * TRUE, if it is.
1101 * FALSE if the file could not be opened or is not a PE file.
1102 *
1103 * NOTES
1104 * If fn is given as NULL then the function expects hf16 to be valid.
1105 */
1106 BOOL16 WINAPI IsPeFormat16(
1107 LPSTR fn, /* [in] Filename to the executeable */
1108 HFILE16 hf16) /* [in] An open file handle */
1109 {
1110 BOOL ret = FALSE;
1111 IMAGE_DOS_HEADER mzh;
1112 OFSTRUCT ofs;
1113 DWORD xmagic;
1114
1115 if (fn) hf16 = OpenFile16(fn,&ofs,OF_READ);
1116 if (hf16 == HFILE_ERROR16) return FALSE;
1117 _llseek16(hf16,0,SEEK_SET);
1118 if (sizeof(mzh)!=_lread16(hf16,&mzh,sizeof(mzh))) goto done;
1119 if (mzh.e_magic!=IMAGE_DOS_SIGNATURE) goto done;
1120 _llseek16(hf16,mzh.e_lfanew,SEEK_SET);
1121 if (sizeof(DWORD)!=_lread16(hf16,&xmagic,sizeof(DWORD))) goto done;
1122 ret = (xmagic == IMAGE_NT_SIGNATURE);
1123 done:
1124 _lclose16(hf16);
1125 return ret;
1126 }
1127
1128
1129 /***********************************************************************
1130 * K32Thk1632Prolog (KERNEL32.@)
1131 */
1132 void WINAPI K32Thk1632Prolog( CONTEXT86 *context )
1133 {
1134 LPBYTE code = (LPBYTE)context->Eip - 5;
1135
1136 /* Arrrgh! SYSTHUNK.DLL just has to re-implement another method
1137 of 16->32 thunks instead of using one of the standard methods!
1138 This means that SYSTHUNK.DLL itself switches to a 32-bit stack,
1139 and does a far call to the 32-bit code segment of OLECLI32/OLESVR32.
1140 Unfortunately, our CallTo/CallFrom mechanism is therefore completely
1141 bypassed, which means it will crash the next time the 32-bit OLE
1142 code thunks down again to 16-bit (this *will* happen!).
1143
1144 The following hack tries to recognize this situation.
1145 This is possible since the called stubs in OLECLI32/OLESVR32 all
1146 look exactly the same:
1147 00 E8xxxxxxxx call K32Thk1632Prolog
1148 05 FF55FC call [ebp-04]
1149 08 E8xxxxxxxx call K32Thk1632Epilog
1150 0D 66CB retf
1151
1152 If we recognize this situation, we try to simulate the actions
1153 of our CallTo/CallFrom mechanism by copying the 16-bit stack
1154 to our 32-bit stack, creating a proper STACK16FRAME and
1155 updating cur_stack. */
1156
1157 if ( code[5] == 0xFF && code[6] == 0x55 && code[7] == 0xFC
1158 && code[13] == 0x66 && code[14] == 0xCB)
1159 {
1160 WORD stackSel = NtCurrentTeb()->stack_sel;
1161 DWORD stackBase = GetSelectorBase(stackSel);
1162
1163 DWORD argSize = context->Ebp - context->Esp;
1164 char *stack16 = (char *)context->Esp - 4;
1165 char *stack32 = (char *)NtCurrentTeb()->cur_stack - argSize;
1166 STACK16FRAME *frame16 = (STACK16FRAME *)stack16 - 1;
1167
1168 TRACE("before SYSTHUNK hack: EBP: %08lx ESP: %08lx cur_stack: %08lx\n",
1169 context->Ebp, context->Esp, NtCurrentTeb()->cur_stack);
1170
1171 memset(frame16, '\0', sizeof(STACK16FRAME));
1172 frame16->frame32 = (STACK32FRAME *)NtCurrentTeb()->cur_stack;
1173 frame16->ebp = context->Ebp;
1174
1175 memcpy(stack32, stack16, argSize);
1176 NtCurrentTeb()->cur_stack = MAKESEGPTR(stackSel, (DWORD)frame16 - stackBase);
1177
1178 context->Esp = (DWORD)stack32 + 4;
1179 context->Ebp = context->Esp + argSize;
1180
1181 TRACE("after SYSTHUNK hack: EBP: %08lx ESP: %08lx cur_stack: %08lx\n",
1182 context->Ebp, context->Esp, NtCurrentTeb()->cur_stack);
1183 }
1184
1185 /* entry_point is never used again once the entry point has
1186 been called. Thus we re-use it to hold the Win16Lock count */
1187 ReleaseThunkLock(&CURRENT_STACK16->entry_point);
1188 }
1189
1190 /***********************************************************************
1191 * K32Thk1632Epilog (KERNEL32.@)
1192 */
1193 void WINAPI K32Thk1632Epilog( CONTEXT86 *context )
1194 {
1195 LPBYTE code = (LPBYTE)context->Eip - 13;
1196
1197 RestoreThunkLock(CURRENT_STACK16->entry_point);
1198
1199 /* We undo the SYSTHUNK hack if necessary. See K32Thk1632Prolog. */
1200
1201 if ( code[5] == 0xFF && code[6] == 0x55 && code[7] == 0xFC
1202 && code[13] == 0x66 && code[14] == 0xCB)
1203 {
1204 STACK16FRAME *frame16 = MapSL(NtCurrentTeb()->cur_stack);
1205 char *stack16 = (char *)(frame16 + 1);
1206 DWORD argSize = frame16->ebp - (DWORD)stack16;
1207 char *stack32 = (char *)frame16->frame32 - argSize;
1208
1209 DWORD nArgsPopped = context->Esp - (DWORD)stack32;
1210
1211 TRACE("before SYSTHUNK hack: EBP: %08lx ESP: %08lx cur_stack: %08lx\n",
1212 context->Ebp, context->Esp, NtCurrentTeb()->cur_stack);
1213
1214 NtCurrentTeb()->cur_stack = (DWORD)frame16->frame32;
1215
1216 context->Esp = (DWORD)stack16 + nArgsPopped;
1217 context->Ebp = frame16->ebp;
1218
1219 TRACE("after SYSTHUNK hack: EBP: %08lx ESP: %08lx cur_stack: %08lx\n",
1220 context->Ebp, context->Esp, NtCurrentTeb()->cur_stack);
1221 }
1222 }
1223
1224 /*********************************************************************
1225 * PK16FNF [KERNEL32.91]
1226 *
1227 * This routine fills in the supplied 13-byte (8.3 plus terminator)
1228 * string buffer with the 8.3 filename of a recently loaded 16-bit
1229 * module. It is unknown exactly what modules trigger this
1230 * mechanism or what purpose this serves. Win98 Explorer (and
1231 * probably also Win95 with IE 4 shell integration) calls this
1232 * several times during initialization.
1233 *
1234 * FIXME: find out what this really does and make it work.
1235 */
1236 void WINAPI PK16FNF(LPSTR strPtr)
1237 {
1238 FIXME("(%p): stub\n", strPtr);
1239
1240 /* fill in a fake filename that'll be easy to recognize */
1241 strcpy(strPtr, "WINESTUB.FIX");
1242 }
1243
1244 /***********************************************************************
1245 * 16->32 Flat Thunk routines:
1246 */
1247
1248 /***********************************************************************
1249 * ThunkConnect16 (KERNEL.651)
1250 * Connects a 32bit and a 16bit thunkbuffer.
1251 */
1252 UINT WINAPI ThunkConnect16(
1253 LPSTR module16, /* [in] name of win16 dll */
1254 LPSTR module32, /* [in] name of win32 dll */
1255 HINSTANCE16 hInst16, /* [in] hInst of win16 dll */
1256 DWORD dwReason, /* [in] initialisation argument */
1257 struct ThunkDataCommon *TD, /* [in/out] thunkbuffer */
1258 LPSTR thunkfun32, /* [in] win32 thunkfunction */
1259 WORD cs /* [in] CS of win16 dll */
1260 ) {
1261 BOOL directionSL;
1262
1263 if (!strncmp(TD->magic, "SL01", 4))
1264 {
1265 directionSL = TRUE;
1266
1267 TRACE("SL01 thunk %s (%lx) -> %s (%s), Reason: %ld\n",
1268 module16, (DWORD)TD, module32, thunkfun32, dwReason);
1269 }
1270 else if (!strncmp(TD->magic, "LS01", 4))
1271 {
1272 directionSL = FALSE;
1273
1274 TRACE("LS01 thunk %s (%lx) <- %s (%s), Reason: %ld\n",
1275 module16, (DWORD)TD, module32, thunkfun32, dwReason);
1276 }
1277 else
1278 {
1279 ERR("Invalid magic %c%c%c%c\n",
1280 TD->magic[0], TD->magic[1], TD->magic[2], TD->magic[3]);
1281 return 0;
1282 }
1283
1284 switch (dwReason)
1285 {
1286 case DLL_PROCESS_ATTACH:
1287 if (directionSL)
1288 {
1289 struct ThunkDataSL16 *SL16 = (struct ThunkDataSL16 *)TD;
1290 struct ThunkDataSL *SL = SL16->fpData;
1291
1292 if (SL == NULL)
1293 {
1294 SL = HeapAlloc(GetProcessHeap(), 0, sizeof(*SL));
1295
1296 SL->common = SL16->common;
1297 SL->flags1 = SL16->flags1;
1298 SL->flags2 = SL16->flags2;
1299
1300 SL->apiDB = MapSL(SL16->apiDatabase);
1301 SL->targetDB = NULL;
1302
1303 lstrcpynA(SL->pszDll16, module16, 255);
1304 lstrcpynA(SL->pszDll32, module32, 255);
1305
1306 /* We should create a SEGPTR to the ThunkDataSL,
1307 but since the contents are not in the original format,
1308 any access to this by 16-bit code would crash anyway. */
1309 SL16->spData = 0;
1310 SL16->fpData = SL;
1311 }
1312
1313
1314 if (SL->flags2 & 0x80000000)
1315 {
1316 TRACE("Preloading 32-bit library\n");
1317 LoadLibraryA(module32);
1318 }
1319 }
1320 else
1321 {
1322 /* nothing to do */
1323 }
1324 break;
1325
1326 case DLL_PROCESS_DETACH:
1327 /* FIXME: cleanup */
1328 break;
1329 }
1330
1331 return 1;
1332 }
1333
1334
1335 /***********************************************************************
1336 * C16ThkSL (KERNEL.630)
1337 */
1338
1339 void WINAPI C16ThkSL(CONTEXT86 *context)
1340 {
1341 LPBYTE stub = MapSL(context->Eax), x = stub;
1342 WORD cs = wine_get_cs();
1343 WORD ds = wine_get_ds();
1344
1345 /* We produce the following code:
1346 *
1347 * mov ax, __FLATDS
1348 * mov es, ax
1349 * movzx ecx, cx
1350 * mov edx, es:[ecx + $EDX]
1351 * push bp
1352 * push edx
1353 * push dx
1354 * push edx
1355 * call __FLATCS:__wine_call_from_16_thunk
1356 */
1357
1358 *x++ = 0xB8; *((WORD *)x)++ = ds;
1359 *x++ = 0x8E; *x++ = 0xC0;
1360 *x++ = 0x66; *x++ = 0x0F; *x++ = 0xB7; *x++ = 0xC9;
1361 *x++ = 0x67; *x++ = 0x66; *x++ = 0x26; *x++ = 0x8B;
1362 *x++ = 0x91; *((DWORD *)x)++ = context->Edx;
1363
1364 *x++ = 0x55;
1365 *x++ = 0x66; *x++ = 0x52;
1366 *x++ = 0x52;
1367 *x++ = 0x66; *x++ = 0x52;
1368 *x++ = 0x66; *x++ = 0x9A; *((DWORD *)x)++ = (DWORD)__wine_call_from_16_thunk;
1369 *((WORD *)x)++ = cs;
1370
1371 /* Jump to the stub code just created */
1372 context->Eip = LOWORD(context->Eax);
1373 context->SegCs = HIWORD(context->Eax);
1374
1375 /* Since C16ThkSL got called by a jmp, we need to leave the
1376 original return address on the stack */
1377 context->Esp -= 4;
1378 }
1379
1380 /***********************************************************************
1381 * C16ThkSL01 (KERNEL.631)
1382 */
1383
1384 void WINAPI C16ThkSL01(CONTEXT86 *context)
1385 {
1386 LPBYTE stub = MapSL(context->Eax), x = stub;
1387
1388 if (stub)
1389 {
1390 struct ThunkDataSL16 *SL16 = MapSL(context->Edx);
1391 struct ThunkDataSL *td = SL16->fpData;
1392
1393 DWORD procAddress = (DWORD)GetProcAddress16(GetModuleHandle16("KERNEL"), (LPCSTR)631);
1394 WORD cs = wine_get_cs();
1395
1396 if (!td)
1397 {
1398 ERR("ThunkConnect16 was not called!\n");
1399 return;
1400 }
1401
1402 TRACE("Creating stub for ThunkDataSL %08lx\n", (DWORD)td);
1403
1404
1405 /* We produce the following code:
1406 *
1407 * xor eax, eax
1408 * mov edx, $td
1409 * call C16ThkSL01
1410 * push bp
1411 * push edx
1412 * push dx
1413 * push edx
1414 * call __FLATCS:__wine_call_from_16_thunk
1415 */
1416
1417 *x++ = 0x66; *x++ = 0x33; *x++ = 0xC0;
1418 *x++ = 0x66; *x++ = 0xBA; *((DWORD *)x)++ = (DWORD)td;
1419 *x++ = 0x9A; *((DWORD *)x)++ = procAddress;
1420
1421 *x++ = 0x55;
1422 *x++ = 0x66; *x++ = 0x52;
1423 *x++ = 0x52;
1424 *x++ = 0x66; *x++ = 0x52;
1425 *x++ = 0x66; *x++ = 0x9A; *((DWORD *)x)++ = (DWORD)__wine_call_from_16_thunk;
1426 *((WORD *)x)++ = cs;
1427
1428 /* Jump to the stub code just created */
1429 context->Eip = LOWORD(context->Eax);
1430 context->SegCs = HIWORD(context->Eax);
1431
1432 /* Since C16ThkSL01 got called by a jmp, we need to leave the
1433 orginal return address on the stack */
1434 context->Esp -= 4;
1435 }
1436 else
1437 {
1438 struct ThunkDataSL *td = (struct ThunkDataSL *)context->Edx;
1439 DWORD targetNr = CX_reg(context) / 4;
1440 struct SLTargetDB *tdb;
1441
1442 TRACE("Process %08lx calling target %ld of ThunkDataSL %08lx\n",
1443 GetCurrentProcessId(), targetNr, (DWORD)td);
1444
1445 for (tdb = td->targetDB; tdb; tdb = tdb->next)
1446 if (tdb->process == GetCurrentProcessId())
1447 break;
1448
1449 if (!tdb)
1450 {
1451 TRACE("Loading 32-bit library %s\n", td->pszDll32);
1452 LoadLibraryA(td->pszDll32);
1453
1454 for (tdb = td->targetDB; tdb; tdb = tdb->next)
1455 if (tdb->process == GetCurrentProcessId())
1456 break;
1457 }
1458
1459 if (tdb)
1460 {
1461 context->Edx = tdb->targetTable[targetNr];
1462
1463 TRACE("Call target is %08lx\n", context->Edx);
1464 }
1465 else
1466 {
1467 WORD *stack = MapSL( MAKESEGPTR(context->SegSs, LOWORD(context->Esp)) );
1468 SET_DX( context, HIWORD(td->apiDB[targetNr].errorReturnValue) );
1469 SET_AX( context, LOWORD(td->apiDB[targetNr].errorReturnValue) );
1470 context->Eip = stack[2];
1471 context->SegCs = stack[3];
1472 context->Esp += td->apiDB[targetNr].nrArgBytes + 4;
1473
1474 ERR("Process %08lx did not ThunkConnect32 %s to %s\n",
1475 GetCurrentProcessId(), td->pszDll32, td->pszDll16);
1476 }
1477 }
1478 }
1479
1480
1481 /***********************************************************************
1482 * 16<->32 Thunklet/Callback API:
1483 */
1484
1485 #include "pshpack1.h"
1486 typedef struct _THUNKLET
1487 {
1488 BYTE prefix_target;
1489 BYTE pushl_target;
1490 DWORD target;
1491
1492 BYTE prefix_relay;
1493 BYTE pushl_relay;
1494 DWORD relay;
1495
1496 BYTE jmp_glue;
1497 DWORD glue;
1498
1499 BYTE type;
1500 HINSTANCE16 owner;
1501 struct _THUNKLET *next;
1502 } THUNKLET;
1503 #include "poppack.h"
1504
1505 #define THUNKLET_TYPE_LS 1
1506 #define THUNKLET_TYPE_SL 2
1507
1508 static HANDLE ThunkletHeap = 0;
1509 static WORD ThunkletCodeSel;
1510 static THUNKLET *ThunkletAnchor = NULL;
1511
1512 static FARPROC ThunkletSysthunkGlueLS = 0;
1513 static SEGPTR ThunkletSysthunkGlueSL = 0;
1514
1515 static FARPROC ThunkletCallbackGlueLS = 0;
1516 static SEGPTR ThunkletCallbackGlueSL = 0;
1517
1518
1519 /* map a thunk allocated on ThunkletHeap to a 16-bit pointer */
1520 inline static SEGPTR get_segptr( void *thunk )
1521 {
1522 if (!thunk) return 0;
1523 return MAKESEGPTR( ThunkletCodeSel, (char *)thunk - (char *)ThunkletHeap );
1524 }
1525
1526 /***********************************************************************
1527 * THUNK_Init
1528 */
1529 static BOOL THUNK_Init(void)
1530 {
1531 LPBYTE thunk;
1532
1533 ThunkletHeap = HeapCreate( 0, 0x10000, 0x10000 );
1534 if (!ThunkletHeap) return FALSE;
1535
1536 ThunkletCodeSel = SELECTOR_AllocBlock( (void *)ThunkletHeap, 0x10000, WINE_LDT_FLAGS_CODE );
1537
1538 thunk = HeapAlloc( ThunkletHeap, 0, 5 );
1539 if (!thunk) return FALSE;
1540
1541 ThunkletSysthunkGlueLS = (FARPROC)thunk;
1542 *thunk++ = 0x58; /* popl eax */
1543 *thunk++ = 0xC3; /* ret */
1544
1545 ThunkletSysthunkGlueSL = get_segptr( thunk );
1546 *thunk++ = 0x66; *thunk++ = 0x58; /* popl eax */
1547 *thunk++ = 0xCB; /* lret */
1548
1549 return TRUE;
1550 }
1551
1552 /***********************************************************************
1553 * SetThunkletCallbackGlue (KERNEL.560)
1554 */
1555 void WINAPI SetThunkletCallbackGlue16( FARPROC glueLS, SEGPTR glueSL )
1556 {
1557 ThunkletCallbackGlueLS = glueLS;
1558 ThunkletCallbackGlueSL = glueSL;
1559 }
1560
1561
1562 /***********************************************************************
1563 * THUNK_FindThunklet
1564 */
1565 THUNKLET *THUNK_FindThunklet( DWORD target, DWORD relay,
1566 DWORD glue, BYTE type )
1567 {
1568 THUNKLET *thunk;
1569
1570 for (thunk = ThunkletAnchor; thunk; thunk = thunk->next)
1571 if ( thunk->type == type
1572 && thunk->target == target
1573 && thunk->relay == relay
1574 && ( type == THUNKLET_TYPE_LS ?
1575 ( thunk->glue == glue - (DWORD)&thunk->type )
1576 : ( thunk->glue == glue ) ) )
1577 return thunk;
1578
1579 return NULL;
1580 }
1581
1582 /***********************************************************************
1583 * THUNK_AllocLSThunklet
1584 */
1585 FARPROC THUNK_AllocLSThunklet( SEGPTR target, DWORD relay,
1586 FARPROC glue, HTASK16 owner )
1587 {
1588 THUNKLET *thunk = THUNK_FindThunklet( (DWORD)target, relay, (DWORD)glue,
1589 THUNKLET_TYPE_LS );
1590 if (!thunk)
1591 {
1592 TDB *pTask = TASK_GetPtr( owner );
1593
1594 if (!ThunkletHeap) THUNK_Init();
1595 if ( !(thunk = HeapAlloc( ThunkletHeap, 0, sizeof(THUNKLET) )) )
1596 return 0;
1597
1598 thunk->prefix_target = thunk->prefix_relay = 0x90;
1599 thunk->pushl_target = thunk->pushl_relay = 0x68;
1600 thunk->jmp_glue = 0xE9;
1601
1602 thunk->target = (DWORD)target;
1603 thunk->relay = (DWORD)relay;
1604 thunk->glue = (DWORD)glue - (DWORD)&thunk->type;
1605
1606 thunk->type = THUNKLET_TYPE_LS;
1607 thunk->owner = pTask? pTask->hInstance : 0;
1608
1609 thunk->next = ThunkletAnchor;
1610 ThunkletAnchor = thunk;
1611 }
1612
1613 return (FARPROC)thunk;
1614 }
1615
1616 /***********************************************************************
1617 * THUNK_AllocSLThunklet
1618 */
1619 SEGPTR THUNK_AllocSLThunklet( FARPROC target, DWORD relay,
1620 SEGPTR glue, HTASK16 owner )
1621 {
1622 THUNKLET *thunk = THUNK_FindThunklet( (DWORD)target, relay, (DWORD)glue,
1623 THUNKLET_TYPE_SL );
1624 if (!thunk)
1625 {
1626 TDB *pTask = TASK_GetPtr( owner );
1627
1628 if (!ThunkletHeap) THUNK_Init();
1629 if ( !(thunk = HeapAlloc( ThunkletHeap, 0, sizeof(THUNKLET) )) )
1630 return 0;
1631
1632 thunk->prefix_target = thunk->prefix_relay = 0x66;
1633 thunk->pushl_target = thunk->pushl_relay = 0x68;
1634 thunk->jmp_glue = 0xEA;
1635
1636 thunk->target = (DWORD)target;
1637 thunk->relay = (DWORD)relay;
1638 thunk->glue = (DWORD)glue;
1639
1640 thunk->type = THUNKLET_TYPE_SL;
1641 thunk->owner = pTask? pTask->hInstance : 0;
1642
1643 thunk->next = ThunkletAnchor;
1644 ThunkletAnchor = thunk;
1645 }
1646
1647 return get_segptr( thunk );
1648 }
1649
1650 /**********************************************************************
1651 * IsLSThunklet
1652 */
1653 BOOL16 WINAPI IsLSThunklet( THUNKLET *thunk )
1654 {
1655 return thunk->prefix_target == 0x90 && thunk->pushl_target == 0x68
1656 && thunk->prefix_relay == 0x90 && thunk->pushl_relay == 0x68
1657 && thunk->jmp_glue == 0xE9 && thunk->type == THUNKLET_TYPE_LS;
1658 }
1659
1660 /**********************************************************************
1661 * IsSLThunklet (KERNEL.612)
1662 */
1663 BOOL16 WINAPI IsSLThunklet16( THUNKLET *thunk )
1664 {
1665 return thunk->prefix_target == 0x66 && thunk->pushl_target == 0x68
1666 && thunk->prefix_relay == 0x66 && thunk->pushl_relay == 0x68
1667 && thunk->jmp_glue == 0xEA && thunk->type == THUNKLET_TYPE_SL;
1668 }
1669
1670
1671
1672 /***********************************************************************
1673 * AllocLSThunkletSysthunk (KERNEL.607)
1674 */
1675 FARPROC WINAPI AllocLSThunkletSysthunk16( SEGPTR target,
1676 FARPROC relay, DWORD dummy )
1677 {
1678 if (!ThunkletSysthunkGlueLS) THUNK_Init();
1679 return THUNK_AllocLSThunklet( (SEGPTR)relay, (DWORD)target,
1680 ThunkletSysthunkGlueLS, GetCurrentTask() );
1681 }
1682
1683 /***********************************************************************
1684 * AllocSLThunkletSysthunk (KERNEL.608)
1685 */
1686 SEGPTR WINAPI AllocSLThunkletSysthunk16( FARPROC target,
1687 SEGPTR relay, DWORD dummy )
1688 {
1689 if (!ThunkletSysthunkGlueSL) THUNK_Init();
1690 return THUNK_AllocSLThunklet( (FARPROC)relay, (DWORD)target,
1691 ThunkletSysthunkGlueSL, GetCurrentTask() );
1692 }
1693
1694
1695 /***********************************************************************
1696 * AllocLSThunkletCallbackEx (KERNEL.567)
1697 */
1698 FARPROC WINAPI AllocLSThunkletCallbackEx16( SEGPTR target,
1699 DWORD relay, HTASK16 task )
1700 {
1701 THUNKLET *thunk = MapSL( target );
1702 if ( !thunk ) return NULL;
1703
1704 if ( IsSLThunklet16( thunk ) && thunk->relay == relay
1705 && thunk->glue == (DWORD)ThunkletCallbackGlueSL )
1706 return (FARPROC)thunk->target;
1707
1708 return THUNK_AllocLSThunklet( target, relay,
1709 ThunkletCallbackGlueLS, task );
1710 }
1711
1712 /***********************************************************************
1713 * AllocSLThunkletCallbackEx (KERNEL.568)
1714 */
1715 SEGPTR WINAPI AllocSLThunkletCallbackEx16( FARPROC target,
1716 DWORD relay, HTASK16 task )
1717 {
1718 THUNKLET *thunk = (THUNKLET *)target;
1719 if ( !thunk ) return 0;
1720
1721 if ( IsLSThunklet( thunk ) && thunk->relay == relay
1722 && thunk->glue == (DWORD)ThunkletCallbackGlueLS - (DWORD)&thunk->type )
1723 return (SEGPTR)thunk->target;
1724
1725 return THUNK_AllocSLThunklet( target, relay,
1726 ThunkletCallbackGlueSL, task );
1727 }
1728
1729 /***********************************************************************
1730 * AllocLSThunkletCallback (KERNEL.561)
1731 * AllocLSThunkletCallback_dup (KERNEL.606)
1732 */
1733 FARPROC WINAPI AllocLSThunkletCallback16( SEGPTR target, DWORD relay )
1734 {
1735 return AllocLSThunkletCallbackEx16( target, relay, GetCurrentTask() );
1736 }
1737
1738 /***********************************************************************
1739 * AllocSLThunkletCallback (KERNEL.562)
1740 * AllocSLThunkletCallback_dup (KERNEL.605)
1741 */
1742 SEGPTR WINAPI AllocSLThunkletCallback16( FARPROC target, DWORD relay )
1743 {
1744 return AllocSLThunkletCallbackEx16( target, relay, GetCurrentTask() );
1745 }
1746
1747 /***********************************************************************
1748 * FindLSThunkletCallback (KERNEL.563)
1749 * FindLSThunkletCallback_dup (KERNEL.609)
1750 */
1751 FARPROC WINAPI FindLSThunkletCallback( SEGPTR target, DWORD relay )
1752 {
1753 THUNKLET *thunk = MapSL( target );
1754 if ( thunk && IsSLThunklet16( thunk ) && thunk->relay == relay
1755 && thunk->glue == (DWORD)ThunkletCallbackGlueSL )
1756 return (FARPROC)thunk->target;
1757
1758 thunk = THUNK_FindThunklet( (DWORD)target, relay,
1759 (DWORD)ThunkletCallbackGlueLS,
1760 THUNKLET_TYPE_LS );
1761 return (FARPROC)thunk;
1762 }
1763
1764 /***********************************************************************
1765 * FindSLThunkletCallback (KERNEL.564)
1766 * FindSLThunkletCallback_dup (KERNEL.610)
1767 */
1768 SEGPTR WINAPI FindSLThunkletCallback( FARPROC target, DWORD relay )
1769 {
1770 THUNKLET *thunk = (THUNKLET *)target;
1771 if ( thunk && IsLSThunklet( thunk ) && thunk->relay == relay
1772 && thunk->glue == (DWORD)ThunkletCallbackGlueLS - (DWORD)&thunk->type )
1773 return (SEGPTR)thunk->target;
1774
1775 thunk = THUNK_FindThunklet( (DWORD)target, relay,
1776 (DWORD)ThunkletCallbackGlueSL,
1777 THUNKLET_TYPE_SL );
1778 return get_segptr( thunk );
1779 }
1780
1781
1782 /***********************************************************************
1783 * FreeThunklet (KERNEL.611)
1784 */
1785 BOOL16 WINAPI FreeThunklet16( DWORD unused1, DWORD unused2 )
1786 {
1787 return FALSE;
1788 }
1789
1790
1791 /***********************************************************************
1792 * Callback Client API
1793 */
1794
1795 #define N_CBC_FIXED 20
1796 #define N_CBC_VARIABLE 10
1797 #define N_CBC_TOTAL (N_CBC_FIXED + N_CBC_VARIABLE)
1798
1799 static SEGPTR CBClientRelay16[ N_CBC_TOTAL ];
1800 static FARPROC *CBClientRelay32[ N_CBC_TOTAL ];
1801
1802 /***********************************************************************
1803 * RegisterCBClient (KERNEL.619)
1804 */
1805 INT16 WINAPI RegisterCBClient16( INT16 wCBCId,
1806 SEGPTR relay16, FARPROC *relay32 )
1807 {
1808 /* Search for free Callback ID */
1809 if ( wCBCId == -1 )
1810 for ( wCBCId = N_CBC_FIXED; wCBCId < N_CBC_TOTAL; wCBCId++ )
1811 if ( !CBClientRelay16[ wCBCId ] )
1812 break;
1813
1814 /* Register Callback ID */
1815 if ( wCBCId > 0 && wCBCId < N_CBC_TOTAL )
1816 {
1817 CBClientRelay16[ wCBCId ] = relay16;
1818 CBClientRelay32[ wCBCId ] = relay32;
1819 }
1820 else
1821 wCBCId = 0;
1822
1823 return wCBCId;
1824 }
1825
1826 /***********************************************************************
1827 * UnRegisterCBClient (KERNEL.622)
1828 */
1829 INT16 WINAPI UnRegisterCBClient16( INT16 wCBCId,
1830 SEGPTR relay16, FARPROC *relay32 )
1831 {
1832 if ( wCBCId >= N_CBC_FIXED && wCBCId < N_CBC_TOTAL
1833 && CBClientRelay16[ wCBCId ] == relay16
1834 && CBClientRelay32[ wCBCId ] == relay32 )
1835 {
1836 CBClientRelay16[ wCBCId ] = 0;
1837 CBClientRelay32[ wCBCId ] = 0;
1838 }
1839 else
1840 wCBCId = 0;
1841
1842 return wCBCId;
1843 }
1844
1845
1846 /***********************************************************************
1847 * InitCBClient (KERNEL.623)
1848 */
1849 void WINAPI InitCBClient16( FARPROC glueLS )
1850 {
1851 HMODULE16 kernel = GetModuleHandle16( "KERNEL" );
1852 SEGPTR glueSL = (SEGPTR)GetProcAddress16( kernel, (LPCSTR)604 );
1853
1854 SetThunkletCallbackGlue16( glueLS, glueSL );
1855 }
1856
1857 /***********************************************************************
1858 * CBClientGlueSL (KERNEL.604)
1859 */
1860 void WINAPI CBClientGlueSL( CONTEXT86 *context )
1861 {
1862 /* Create stack frame */
1863 SEGPTR stackSeg = stack16_push( 12 );
1864 LPWORD stackLin = MapSL( stackSeg );
1865 SEGPTR glue, *glueTab;
1866
1867 stackLin[3] = (WORD)context->Ebp;
1868 stackLin[2] = (WORD)context->Esi;
1869 stackLin[1] = (WORD)context->Edi;
1870 stackLin[0] = (WORD)context->SegDs;
1871
1872 context->Ebp = OFFSETOF( stackSeg ) + 6;
1873 context->Esp = OFFSETOF( stackSeg ) - 4;
1874 context->SegGs = 0;
1875
1876 /* Jump to 16-bit relay code */
1877 glueTab = MapSL( CBClientRelay16[ stackLin[5] ] );
1878 glue = glueTab[ stackLin[4] ];
1879 context->SegCs = SELECTOROF( glue );
1880 context->Eip = OFFSETOF ( glue );
1881 }
1882
1883 /***********************************************************************
1884 * CBClientThunkSL (KERNEL.620)
1885 */
1886 extern DWORD CALL32_CBClient( FARPROC proc, LPWORD args, DWORD *esi );
1887 void WINAPI CBClientThunkSL( CONTEXT86 *context )
1888 {
1889 /* Call 32-bit relay code */
1890
1891 LPWORD args = MapSL( MAKESEGPTR( context->SegSs, LOWORD(context->Ebp) ) );
1892 FARPROC proc = CBClientRelay32[ args[2] ][ args[1] ];
1893
1894 context->Eax = CALL32_CBClient( proc, args, &context->Esi );
1895 }
1896
1897 /***********************************************************************
1898 * CBClientThunkSLEx (KERNEL.621)
1899 */
1900 extern DWORD CALL32_CBClientEx( FARPROC proc, LPWORD args, DWORD *esi, INT *nArgs );
1901 void WINAPI CBClientThunkSLEx( CONTEXT86 *context )
1902 {
1903 /* Call 32-bit relay code */
1904
1905 LPWORD args = MapSL( MAKESEGPTR( context->SegSs, LOWORD(context->Ebp) ) );
1906 FARPROC proc = CBClientRelay32[ args[2] ][ args[1] ];
1907 INT nArgs;
1908 LPWORD stackLin;
1909
1910 context->Eax = CALL32_CBClientEx( proc, args, &context->Esi, &nArgs );
1911
1912 /* Restore registers saved by CBClientGlueSL */
1913 stackLin = (LPWORD)((LPBYTE)CURRENT_STACK16 + sizeof(STACK16FRAME) - 4);
1914 context->Ebp = (context->Ebp & ~0xffff) | stackLin[3];
1915 SET_SI( context, stackLin[2] );
1916 SET_DI( context, stackLin[1] );
1917 context->SegDs = stackLin[0];
1918 context->Esp += 16+nArgs;
1919
1920 /* Return to caller of CBClient thunklet */
1921 context->SegCs = stackLin[9];
1922 context->Eip = stackLin[8];
1923 }
1924
1925
1926 /***********************************************************************
1927 * Get16DLLAddress (KERNEL32.@)
1928 *
1929 * This function is used by a Win32s DLL if it wants to call a Win16 function.
1930 * A 16:16 segmented pointer to the function is returned.
1931 * Written without any docu.
1932 */
1933 SEGPTR WINAPI Get16DLLAddress(HMODULE16 handle, LPSTR func_name)
1934 {
1935 static WORD code_sel32;
1936 FARPROC16 proc_16;
1937 LPBYTE thunk;
1938
1939 if (!code_sel32)
1940 {
1941 if (!ThunkletHeap) THUNK_Init();
1942 code_sel32 = SELECTOR_AllocBlock( (void *)ThunkletHeap, 0x10000,
1943 WINE_LDT_FLAGS_CODE | WINE_LDT_FLAGS_32BIT );
1944 if (!code_sel32) return 0;
1945 }
1946 if (!(thunk = HeapAlloc( ThunkletHeap, 0, 32 ))) return 0;
1947
1948 if (!handle) handle = GetModuleHandle16("WIN32S16");
1949 proc_16 = GetProcAddress16(handle, func_name);
1950
1951 /* movl proc_16, $edx */
1952 *thunk++ = 0xba;
1953 *(FARPROC16 *)thunk = proc_16;
1954 thunk += sizeof(FARPROC16);
1955
1956 /* jmpl QT_Thunk */
1957 *thunk++ = 0xea;
1958 *(FARPROC *)thunk = GetProcAddress(GetModuleHandleA("KERNEL32"),"QT_Thunk");
1959 thunk += sizeof(FARPROC16);
1960 *(WORD *)thunk = wine_get_cs();
1961
1962 return MAKESEGPTR( code_sel32, (char *)thunk - (char *)ThunkletHeap );
1963 }
1964
1965
1966 /***********************************************************************
1967 * GetWin16DOSEnv (KERNEL32.34)
1968 * Returns some internal value.... probably the default environment database?
1969 */
1970 DWORD WINAPI GetWin16DOSEnv()
1971 {
1972 FIXME("stub, returning 0\n");
1973 return 0;
1974 }
1975
1976 /**********************************************************************
1977 * GetPK16SysVar (KERNEL32.92)
1978 */
1979 LPVOID WINAPI GetPK16SysVar(void)
1980 {
1981 static BYTE PK16SysVar[128];
1982
1983 FIXME("()\n");
1984 return PK16SysVar;
1985 }
1986
1987 /**********************************************************************
1988 * CommonUnimpStub (KERNEL32.17)
1989 */
1990 void WINAPI CommonUnimpStub( CONTEXT86 *context )
1991 {
1992 if (context->Eax)
1993 MESSAGE( "*** Unimplemented Win32 API: %s\n", (LPSTR)context->Eax );
1994
1995 switch ((context->Ecx >> 4) & 0x0f)
1996 {
1997 case 15: context->Eax = -1; break;
1998 case 14: context->Eax = 0x78; break;
1999 case 13: context->Eax = 0x32; break;
2000 case 1: context->Eax = 1; break;
2001 default: context->Eax = 0; break;
2002 }
2003
2004 context->Esp += (context->Ecx & 0x0f) * 4;
2005 }
2006
2007 /**********************************************************************
2008 * HouseCleanLogicallyDeadHandles (KERNEL32.33)
2009 */
2010 void WINAPI HouseCleanLogicallyDeadHandles(void)
2011 {
2012 /* Whatever this is supposed to do, our handles probably
2013 don't need it :-) */
2014 }
2015
2016 /**********************************************************************
2017 * @ (KERNEL32.100)
2018 */
2019 BOOL WINAPI _KERNEL32_100(HANDLE threadid,DWORD exitcode,DWORD x)
2020 {
2021 FIXME("(%p,%ld,0x%08lx): stub\n",threadid,exitcode,x);
2022 return TRUE;
2023 }
2024
2025 /**********************************************************************
2026 * @ (KERNEL32.99)
2027 *
2028 * Checks whether the clock has to be switched from daylight
2029 * savings time to standard time or vice versa.
2030 *
2031 */
2032 DWORD WINAPI _KERNEL32_99(DWORD x)
2033 {
2034 FIXME("(0x%08lx): stub\n",x);
2035 return 1;
2036 }
2037
2038
2039 /**********************************************************************
2040 * Catch (KERNEL.55)
2041 *
2042 * Real prototype is:
2043 * INT16 WINAPI Catch( LPCATCHBUF lpbuf );
2044 */
2045 void WINAPI Catch16( LPCATCHBUF lpbuf, CONTEXT86 *context )
2046 {
2047 /* Note: we don't save the current ss, as the catch buffer is */
2048 /* only 9 words long. Hopefully no one will have the silly */
2049 /* idea to change the current stack before calling Throw()... */
2050
2051 /* Windows uses:
2052 * lpbuf[0] = ip
2053 * lpbuf[1] = cs
2054 * lpbuf[2] = sp
2055 * lpbuf[3] = bp
2056 * lpbuf[4] = si
2057 * lpbuf[5] = di
2058 * lpbuf[6] = ds
2059 * lpbuf[7] = unused
2060 * lpbuf[8] = ss
2061 */
2062
2063 lpbuf[0] = LOWORD(context->Eip);
2064 lpbuf[1] = context->SegCs;
2065 /* Windows pushes 4 more words before saving sp */
2066 lpbuf[2] = LOWORD(context->Esp) - 4 * sizeof(WORD);
2067 lpbuf[3] = LOWORD(context->Ebp);
2068 lpbuf[4] = LOWORD(context->Esi);
2069 lpbuf[5] = LOWORD(context->Edi);
2070 lpbuf[6] = context->SegDs;
2071 lpbuf[7] = 0;
2072 lpbuf[8] = context->SegSs;
2073 SET_AX( context, 0 ); /* Return 0 */
2074 }
2075
2076
2077 /**********************************************************************
2078 * Throw (KERNEL.56)
2079 *
2080 * Real prototype is:
2081 * INT16 WINAPI Throw( LPCATCHBUF lpbuf, INT16 retval );
2082 */
2083 void WINAPI Throw16( LPCATCHBUF lpbuf, INT16 retval, CONTEXT86 *context )
2084 {
2085 STACK16FRAME *pFrame;
2086 STACK32FRAME *frame32;
2087 TEB *teb = NtCurrentTeb();
2088
2089 SET_AX( context, retval );
2090
2091 /* Find the frame32 corresponding to the frame16 we are jumping to */
2092 pFrame = THREAD_STACK16(teb);
2093 frame32 = pFrame->frame32;
2094 while (frame32 && frame32->frame16)
2095 {
2096 if (OFFSETOF(frame32->frame16) < OFFSETOF(teb->cur_stack))
2097 break; /* Something strange is going on */
2098 if (OFFSETOF(frame32->frame16) > lpbuf[2])
2099 {
2100 /* We found the right frame */
2101 pFrame->frame32 = frame32;
2102 break;
2103 }
2104 frame32 = ((STACK16FRAME *)MapSL(frame32->frame16))->frame32;
2105 }
2106 RtlUnwind( &pFrame->frame32->frame, NULL, NULL, 0 );
2107
2108 context->Eip = lpbuf[0];
2109 context->SegCs = lpbuf[1];
2110 context->Esp = lpbuf[2] + 4 * sizeof(WORD) - sizeof(WORD) /*extra arg*/;
2111 context->Ebp = lpbuf[3];
2112 context->Esi = lpbuf[4];
2113 context->Edi = lpbuf[5];
2114 context->SegDs = lpbuf[6];
2115
2116 if (lpbuf[8] != context->SegSs)
2117 ERR("Switching stack segment with Throw() not supported; expect crash now\n" );
2118 }
DirectPlay implementation for GSoC