2 * KERNEL32 thunks and other undocumented stuff
4 * Copyright 1996, 1997 Alexandre Julliard
5 * Copyright 1997, 1998 Marcus Meissner
6 * Copyright 1998 Ulrich Weigand
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.
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.
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
26 #include <sys/types.h>
39 #include "wine/winbase16.h"
41 #include "wine/debug.h"
42 #include "wine/library.h"
44 #include "stackframe.h"
45 #include "kernel_private.h"
47 WINE_DEFAULT_DEBUG_CHANNEL(thunk
);
49 struct ThunkDataCommon
51 char magic
[4]; /* 00 */
52 DWORD checksum
; /* 04 */
57 struct ThunkDataCommon common
; /* 00 */
58 SEGPTR targetTable
; /* 08 */
59 DWORD firstTime
; /* 0C */
64 struct ThunkDataCommon common
; /* 00 */
65 DWORD
* targetTable
; /* 08 */
66 char lateBinding
[4]; /* 0C */
68 DWORD reserved1
; /* 14 */
69 DWORD reserved2
; /* 18 */
70 DWORD offsetQTThunk
; /* 1C */
71 DWORD offsetFTProlog
; /* 20 */
76 struct ThunkDataCommon common
; /* 00 */
77 DWORD flags1
; /* 08 */
78 DWORD reserved1
; /* 0C */
79 struct ThunkDataSL
* fpData
; /* 10 */
80 SEGPTR spData
; /* 14 */
81 DWORD reserved2
; /* 18 */
82 char lateBinding
[4]; /* 1C */
83 DWORD flags2
; /* 20 */
84 DWORD reserved3
; /* 20 */
85 SEGPTR apiDatabase
; /* 28 */
90 struct ThunkDataCommon common
; /* 00 */
91 DWORD reserved1
; /* 08 */
92 struct ThunkDataSL
* data
; /* 0C */
93 char lateBinding
[4]; /* 10 */
95 DWORD reserved2
; /* 18 */
96 DWORD reserved3
; /* 1C */
97 DWORD offsetTargetTable
; /* 20 */
103 This structure differs from the Win95 original
,
104 but
this should
not matter since it is strictly internal to
105 the thunk handling routines in KRNL386
/ KERNEL32
.
107 For reference
, here is the Win95 layout
:
109 struct ThunkDataCommon common
; /* 00 */
110 DWORD flags1
; /* 08 */
111 SEGPTR apiDatabase
; /* 0C */
112 WORD exePtr
; /* 10 */
113 WORD segMBA
; /* 12 */
114 DWORD lenMBATotal
; /* 14 */
115 DWORD lenMBAUsed
; /* 18 */
116 DWORD flags2
; /* 1C */
117 char pszDll16
[256]; /* 20 */
118 char pszDll32
[256]; /*120 */
120 We
do it differently since all our thunk handling is done
121 by
32-bit code
. Therefore we
do not need
do provide
122 easy access to
this data
, especially the process target
123 table database
, for 16-bit code
.
126 struct ThunkDataCommon common
;
128 struct SLApiDB
* apiDB
;
129 struct SLTargetDB
* targetDB
;
137 struct SLTargetDB
* next
;
145 DWORD errorReturnValue
;
149 extern void __wine_call_from_16_thunk();
151 static void __wine_call_from_16_thunk() { }
154 /* Push a DWORD on the 32-bit stack */
155 static inline void stack32_push( CONTEXT86
*context
, DWORD val
)
157 context
->Esp
-= sizeof(DWORD
);
158 *(DWORD
*)context
->Esp
= val
;
161 /* Pop a DWORD from the 32-bit stack */
162 static inline DWORD
stack32_pop( CONTEXT86
*context
)
164 DWORD ret
= *(DWORD
*)context
->Esp
;
165 context
->Esp
+= sizeof(DWORD
);
169 /***********************************************************************
171 * Win95 internal thunks *
173 ***********************************************************************/
175 /***********************************************************************
176 * LogApiThk (KERNEL.423)
178 void WINAPI
LogApiThk( LPSTR func
)
180 TRACE( "%s\n", debugstr_a(func
) );
183 /***********************************************************************
184 * LogApiThkLSF (KERNEL32.42)
186 * NOTE: needs to preserve all registers!
188 void WINAPI
LogApiThkLSF( LPSTR func
, CONTEXT86
*context
)
190 TRACE( "%s\n", debugstr_a(func
) );
193 /***********************************************************************
194 * LogApiThkSL (KERNEL32.44)
196 * NOTE: needs to preserve all registers!
198 void WINAPI
LogApiThkSL( LPSTR func
, CONTEXT86
*context
)
200 TRACE( "%s\n", debugstr_a(func
) );
203 /***********************************************************************
204 * LogCBThkSL (KERNEL32.47)
206 * NOTE: needs to preserve all registers!
208 void WINAPI
LogCBThkSL( LPSTR func
, CONTEXT86
*context
)
210 TRACE( "%s\n", debugstr_a(func
) );
213 /***********************************************************************
214 * Generates a FT_Prolog call.
216 * 0FB6D1 movzbl edx,cl
217 * 8B1495xxxxxxxx mov edx,[4*edx + targetTable]
218 * 68xxxxxxxx push FT_Prolog
221 static void _write_ftprolog(LPBYTE relayCode
,DWORD
*targetTable
) {
225 *x
++ = 0x0f;*x
++=0xb6;*x
++=0xd1; /* movzbl edx,cl */
226 *x
++ = 0x8B;*x
++=0x14;*x
++=0x95;*(DWORD
**)x
= targetTable
;
227 x
+=4; /* mov edx, [4*edx + targetTable] */
228 *x
++ = 0x68; *(DWORD
*)x
= (DWORD
)GetProcAddress(kernel32_handle
,"FT_Prolog");
229 x
+=4; /* push FT_Prolog */
230 *x
++ = 0xC3; /* lret */
231 /* fill rest with 0xCC / int 3 */
234 /***********************************************************************
235 * _write_qtthunk (internal)
236 * Generates a QT_Thunk style call.
239 * 8A4DFC mov cl , [ebp-04]
240 * 8B148Dxxxxxxxx mov edx, [4*ecx + targetTable]
241 * B8yyyyyyyy mov eax, QT_Thunk
244 static void _write_qtthunk(
245 LPBYTE relayCode
, /* [in] start of QT_Thunk stub */
246 DWORD
*targetTable
/* [in] start of thunk (for index lookup) */
251 *x
++ = 0x33;*x
++=0xC9; /* xor ecx,ecx */
252 *x
++ = 0x8A;*x
++=0x4D;*x
++=0xFC; /* movb cl,[ebp-04] */
253 *x
++ = 0x8B;*x
++=0x14;*x
++=0x8D;*(DWORD
**)x
= targetTable
;
254 x
+=4; /* mov edx, [4*ecx + targetTable */
255 *x
++ = 0xB8; *(DWORD
*)x
= (DWORD
)GetProcAddress(kernel32_handle
,"QT_Thunk");
256 x
+=4; /* mov eax , QT_Thunk */
257 *x
++ = 0xFF; *x
++ = 0xE0; /* jmp eax */
258 /* should fill the rest of the 32 bytes with 0xCC */
261 /***********************************************************************
264 static LPVOID
_loadthunk(LPCSTR module
, LPCSTR func
, LPCSTR module32
,
265 struct ThunkDataCommon
*TD32
, DWORD checksum
)
267 struct ThunkDataCommon
*TD16
;
271 if ((hmod
= LoadLibrary16(module
)) <= 32)
273 ERR("(%s, %s, %s): Unable to load '%s', error %d\n",
274 module
, func
, module32
, module
, hmod
);
278 if ( !(ordinal
= NE_GetOrdinal(hmod
, func
))
279 || !(TD16
= MapSL((SEGPTR
)NE_GetEntryPointEx(hmod
, ordinal
, FALSE
))))
281 ERR("Unable to find thunk data '%s' in %s, required by %s (conflicting/incorrect DLL versions !?).\n",
282 func
, module
, module32
);
286 if (TD32
&& memcmp(TD16
->magic
, TD32
->magic
, 4))
288 ERR("(%s, %s, %s): Bad magic %c%c%c%c (should be %c%c%c%c)\n",
289 module
, func
, module32
,
290 TD16
->magic
[0], TD16
->magic
[1], TD16
->magic
[2], TD16
->magic
[3],
291 TD32
->magic
[0], TD32
->magic
[1], TD32
->magic
[2], TD32
->magic
[3]);
295 if (TD32
&& TD16
->checksum
!= TD32
->checksum
)
297 ERR("(%s, %s, %s): Wrong checksum %08lx (should be %08lx)\n",
298 module
, func
, module32
, TD16
->checksum
, TD32
->checksum
);
302 if (!TD32
&& checksum
&& checksum
!= *(LPDWORD
)TD16
)
304 ERR("(%s, %s, %s): Wrong checksum %08lx (should be %08lx)\n",
305 module
, func
, module32
, *(LPDWORD
)TD16
, checksum
);
312 /***********************************************************************
313 * GetThunkStuff (KERNEL32.53)
315 LPVOID WINAPI
GetThunkStuff(LPSTR module
, LPSTR func
)
317 return _loadthunk(module
, func
, "<kernel>", NULL
, 0L);
320 /***********************************************************************
321 * GetThunkBuff (KERNEL32.52)
322 * Returns a pointer to ThkBuf in the 16bit library SYSTHUNK.DLL.
324 LPVOID WINAPI
GetThunkBuff(void)
326 return GetThunkStuff("SYSTHUNK.DLL", "ThkBuf");
329 /***********************************************************************
330 * ThunkConnect32 (KERNEL32.@)
331 * Connects a 32bit and a 16bit thunkbuffer.
333 UINT WINAPI
ThunkConnect32(
334 struct ThunkDataCommon
*TD
, /* [in/out] thunkbuffer */
335 LPSTR thunkfun16
, /* [in] win16 thunkfunction */
336 LPSTR module16
, /* [in] name of win16 dll */
337 LPSTR module32
, /* [in] name of win32 dll */
338 HMODULE hmod32
, /* [in] hmodule of win32 dll */
339 DWORD dwReason
/* [in] initialisation argument */
343 if (!strncmp(TD
->magic
, "SL01", 4))
347 TRACE("SL01 thunk %s (%lx) <- %s (%s), Reason: %ld\n",
348 module32
, (DWORD
)TD
, module16
, thunkfun16
, dwReason
);
350 else if (!strncmp(TD
->magic
, "LS01", 4))
354 TRACE("LS01 thunk %s (%lx) -> %s (%s), Reason: %ld\n",
355 module32
, (DWORD
)TD
, module16
, thunkfun16
, dwReason
);
359 ERR("Invalid magic %c%c%c%c\n",
360 TD
->magic
[0], TD
->magic
[1], TD
->magic
[2], TD
->magic
[3]);
366 case DLL_PROCESS_ATTACH
:
368 struct ThunkDataCommon
*TD16
;
369 if (!(TD16
= _loadthunk(module16
, thunkfun16
, module32
, TD
, 0L)))
374 struct ThunkDataSL32
*SL32
= (struct ThunkDataSL32
*)TD
;
375 struct ThunkDataSL16
*SL16
= (struct ThunkDataSL16
*)TD16
;
376 struct SLTargetDB
*tdb
;
378 if (SL16
->fpData
== NULL
)
380 ERR("ThunkConnect16 was not called!\n");
384 SL32
->data
= SL16
->fpData
;
386 tdb
= HeapAlloc(GetProcessHeap(), 0, sizeof(*tdb
));
387 tdb
->process
= GetCurrentProcessId();
388 tdb
->targetTable
= (DWORD
*)(thunkfun16
+ SL32
->offsetTargetTable
);
390 tdb
->next
= SL32
->data
->targetDB
; /* FIXME: not thread-safe! */
391 SL32
->data
->targetDB
= tdb
;
393 TRACE("Process %08lx allocated TargetDB entry for ThunkDataSL %08lx\n",
394 GetCurrentProcessId(), (DWORD
)SL32
->data
);
398 struct ThunkDataLS32
*LS32
= (struct ThunkDataLS32
*)TD
;
399 struct ThunkDataLS16
*LS16
= (struct ThunkDataLS16
*)TD16
;
401 LS32
->targetTable
= MapSL(LS16
->targetTable
);
403 /* write QT_Thunk and FT_Prolog stubs */
404 _write_qtthunk ((LPBYTE
)TD
+ LS32
->offsetQTThunk
, LS32
->targetTable
);
405 _write_ftprolog((LPBYTE
)TD
+ LS32
->offsetFTProlog
, LS32
->targetTable
);
410 case DLL_PROCESS_DETACH
:
418 /**********************************************************************
419 * QT_Thunk (KERNEL32.@)
421 * The target address is in EDX.
422 * The 16bit arguments start at ESP.
423 * The number of 16bit argument bytes is EBP-ESP-0x40 (64 Byte thunksetup).
424 * So the stack layout is 16bit argument bytes and then the 64 byte
426 * The scratch buffer is used as work space by Windows' QT_Thunk
428 * As the programs unfortunately don't always provide a fixed size
429 * scratch buffer (danger, stack corruption ahead !!), we simply resort
430 * to copying over the whole EBP-ESP range to the 16bit stack
431 * (as there's no way to safely figure out the param count
432 * due to this misbehaviour of some programs).
435 * See DDJ article 9614c for a very good description of QT_Thunk (also
436 * available online !).
438 * FIXME: DDJ talks of certain register usage rules; I'm not sure
439 * whether we cover this 100%.
441 void WINAPI
QT_Thunk( CONTEXT86
*context
)
446 memcpy(&context16
,context
,sizeof(context16
));
448 context16
.SegFs
= wine_get_fs();
449 context16
.SegGs
= wine_get_gs();
450 context16
.SegCs
= HIWORD(context
->Edx
);
451 context16
.Eip
= LOWORD(context
->Edx
);
452 /* point EBP to the STACK16FRAME on the stack
453 * for the call_to_16 to set up the register content on calling */
454 context16
.Ebp
= OFFSETOF( NtCurrentTeb()->cur_stack
)
455 + (WORD
)&((STACK16FRAME
*)0)->bp
;
458 * used to be (problematic):
459 * argsize = context->Ebp - context->Esp - 0x40;
460 * due to some programs abusing the API, we better assume the full
461 * EBP - ESP range for copying instead: */
462 argsize
= context
->Ebp
- context
->Esp
;
464 /* ok, too much is insane; let's limit param count a bit again */
466 argsize
= 64; /* 32 WORDs */
468 WOWCallback16Ex( 0, WCB16_REGS
, argsize
, (void *)context
->Esp
, (DWORD
*)&context16
);
469 context
->Eax
= context16
.Eax
;
470 context
->Edx
= context16
.Edx
;
471 context
->Ecx
= context16
.Ecx
;
473 /* make sure to update the Win32 ESP, too, in order to throw away
474 * the number of parameters that the Win16 function
475 * accepted (that it popped from the corresponding Win16 stack) */
476 context
->Esp
+= LOWORD(context16
.Esp
) -
477 ( OFFSETOF( NtCurrentTeb()->cur_stack
) - argsize
);
481 /**********************************************************************
482 * FT_Prolog (KERNEL32.@)
484 * The set of FT_... thunk routines is used instead of QT_Thunk,
485 * if structures have to be converted from 32-bit to 16-bit
486 * (change of member alignment, conversion of members).
488 * The thunk function (as created by the thunk compiler) calls
489 * FT_Prolog at the beginning, to set up a stack frame and
490 * allocate a 64 byte buffer on the stack.
491 * The input parameters (target address and some flags) are
492 * saved for later use by FT_Thunk.
494 * Input: EDX 16-bit target address (SEGPTR)
495 * CX bits 0..7 target number (in target table)
496 * bits 8..9 some flags (unclear???)
497 * bits 10..15 number of DWORD arguments
499 * Output: A new stackframe is created, and a 64 byte buffer
500 * allocated on the stack. The layout of the stack
501 * on return is as follows:
503 * (ebp+4) return address to caller of thunk function
505 * (ebp-4) saved EBX register of caller
506 * (ebp-8) saved ESI register of caller
507 * (ebp-12) saved EDI register of caller
508 * (ebp-16) saved ECX register, containing flags
509 * (ebp-20) bitmap containing parameters that are to be converted
510 * by FT_Thunk; it is initialized to 0 by FT_Prolog and
511 * filled in by the thunk code before calling FT_Thunk
515 * (ebp-48) saved EAX register of caller (unclear, never restored???)
516 * (ebp-52) saved EDX register, containing 16-bit thunk target
521 * ESP is EBP-64 after return.
525 void WINAPI
FT_Prolog( CONTEXT86
*context
)
527 /* Build stack frame */
528 stack32_push(context
, context
->Ebp
);
529 context
->Ebp
= context
->Esp
;
531 /* Allocate 64-byte Thunk Buffer */
533 memset((char *)context
->Esp
, '\0', 64);
535 /* Store Flags (ECX) and Target Address (EDX) */
536 /* Save other registers to be restored later */
537 *(DWORD
*)(context
->Ebp
- 4) = context
->Ebx
;
538 *(DWORD
*)(context
->Ebp
- 8) = context
->Esi
;
539 *(DWORD
*)(context
->Ebp
- 12) = context
->Edi
;
540 *(DWORD
*)(context
->Ebp
- 16) = context
->Ecx
;
542 *(DWORD
*)(context
->Ebp
- 48) = context
->Eax
;
543 *(DWORD
*)(context
->Ebp
- 52) = context
->Edx
;
546 /**********************************************************************
547 * FT_Thunk (KERNEL32.@)
549 * This routine performs the actual call to 16-bit code,
550 * similar to QT_Thunk. The differences are:
551 * - The call target is taken from the buffer created by FT_Prolog
552 * - Those arguments requested by the thunk code (by setting the
553 * corresponding bit in the bitmap at EBP-20) are converted
554 * from 32-bit pointers to segmented pointers (those pointers
555 * are guaranteed to point to structures copied to the stack
556 * by the thunk code, so we always use the 16-bit stack selector
557 * for those addresses).
559 * The bit #i of EBP-20 corresponds here to the DWORD starting at
562 * FIXME: It is unclear what happens if there are more than 32 WORDs
563 * of arguments, so that the single DWORD bitmap is no longer
567 void WINAPI
FT_Thunk( CONTEXT86
*context
)
569 DWORD mapESPrelative
= *(DWORD
*)(context
->Ebp
- 20);
570 DWORD callTarget
= *(DWORD
*)(context
->Ebp
- 52);
577 memcpy(&context16
,context
,sizeof(context16
));
579 context16
.SegFs
= wine_get_fs();
580 context16
.SegGs
= wine_get_gs();
581 context16
.SegCs
= HIWORD(callTarget
);
582 context16
.Eip
= LOWORD(callTarget
);
583 context16
.Ebp
= OFFSETOF( NtCurrentTeb()->cur_stack
)
584 + (WORD
)&((STACK16FRAME
*)0)->bp
;
586 argsize
= context
->Ebp
-context
->Esp
-0x40;
587 if (argsize
> sizeof(newstack
)) argsize
= sizeof(newstack
);
588 oldstack
= (LPBYTE
)context
->Esp
;
590 memcpy( newstack
, oldstack
, argsize
);
592 for (i
= 0; i
< 32; i
++) /* NOTE: What about > 32 arguments? */
593 if (mapESPrelative
& (1 << i
))
595 SEGPTR
*arg
= (SEGPTR
*)newstack
[i
];
596 *arg
= MAKESEGPTR(SELECTOROF(NtCurrentTeb()->cur_stack
),
597 OFFSETOF(NtCurrentTeb()->cur_stack
) - argsize
598 + (*(LPBYTE
*)arg
- oldstack
));
601 WOWCallback16Ex( 0, WCB16_REGS
, argsize
, newstack
, (DWORD
*)&context16
);
602 context
->Eax
= context16
.Eax
;
603 context
->Edx
= context16
.Edx
;
604 context
->Ecx
= context16
.Ecx
;
606 context
->Esp
+= LOWORD(context16
.Esp
) -
607 ( OFFSETOF( NtCurrentTeb()->cur_stack
) - argsize
);
609 /* Copy modified buffers back to 32-bit stack */
610 memcpy( oldstack
, newstack
, argsize
);
613 /**********************************************************************
614 * FT_ExitNN (KERNEL32.218 - 232)
616 * One of the FT_ExitNN functions is called at the end of the thunk code.
617 * It removes the stack frame created by FT_Prolog, moves the function
618 * return from EBX to EAX (yes, FT_Thunk did use EAX for the return
619 * value, but the thunk code has moved it from EAX to EBX in the
620 * meantime ... :-), restores the caller's EBX, ESI, and EDI registers,
621 * and perform a return to the CALLER of the thunk code (while removing
622 * the given number of arguments from the caller's stack).
625 static void FT_Exit(CONTEXT86
*context
, int nPopArgs
)
627 /* Return value is in EBX */
628 context
->Eax
= context
->Ebx
;
630 /* Restore EBX, ESI, and EDI registers */
631 context
->Ebx
= *(DWORD
*)(context
->Ebp
- 4);
632 context
->Esi
= *(DWORD
*)(context
->Ebp
- 8);
633 context
->Edi
= *(DWORD
*)(context
->Ebp
- 12);
635 /* Clean up stack frame */
636 context
->Esp
= context
->Ebp
;
637 context
->Ebp
= stack32_pop(context
);
639 /* Pop return address to CALLER of thunk code */
640 context
->Eip
= stack32_pop(context
);
641 /* Remove arguments */
642 context
->Esp
+= nPopArgs
;
645 /***********************************************************************
646 * FT_Exit0 (KERNEL32.@)
648 void WINAPI
FT_Exit0 (CONTEXT86
*context
) { FT_Exit(context
, 0); }
650 /***********************************************************************
651 * FT_Exit4 (KERNEL32.@)
653 void WINAPI
FT_Exit4 (CONTEXT86
*context
) { FT_Exit(context
, 4); }
655 /***********************************************************************
656 * FT_Exit8 (KERNEL32.@)
658 void WINAPI
FT_Exit8 (CONTEXT86
*context
) { FT_Exit(context
, 8); }
660 /***********************************************************************
661 * FT_Exit12 (KERNEL32.@)
663 void WINAPI
FT_Exit12(CONTEXT86
*context
) { FT_Exit(context
, 12); }
665 /***********************************************************************
666 * FT_Exit16 (KERNEL32.@)
668 void WINAPI
FT_Exit16(CONTEXT86
*context
) { FT_Exit(context
, 16); }
670 /***********************************************************************
671 * FT_Exit20 (KERNEL32.@)
673 void WINAPI
FT_Exit20(CONTEXT86
*context
) { FT_Exit(context
, 20); }
675 /***********************************************************************
676 * FT_Exit24 (KERNEL32.@)
678 void WINAPI
FT_Exit24(CONTEXT86
*context
) { FT_Exit(context
, 24); }
680 /***********************************************************************
681 * FT_Exit28 (KERNEL32.@)
683 void WINAPI
FT_Exit28(CONTEXT86
*context
) { FT_Exit(context
, 28); }
685 /***********************************************************************
686 * FT_Exit32 (KERNEL32.@)
688 void WINAPI
FT_Exit32(CONTEXT86
*context
) { FT_Exit(context
, 32); }
690 /***********************************************************************
691 * FT_Exit36 (KERNEL32.@)
693 void WINAPI
FT_Exit36(CONTEXT86
*context
) { FT_Exit(context
, 36); }
695 /***********************************************************************
696 * FT_Exit40 (KERNEL32.@)
698 void WINAPI
FT_Exit40(CONTEXT86
*context
) { FT_Exit(context
, 40); }
700 /***********************************************************************
701 * FT_Exit44 (KERNEL32.@)
703 void WINAPI
FT_Exit44(CONTEXT86
*context
) { FT_Exit(context
, 44); }
705 /***********************************************************************
706 * FT_Exit48 (KERNEL32.@)
708 void WINAPI
FT_Exit48(CONTEXT86
*context
) { FT_Exit(context
, 48); }
710 /***********************************************************************
711 * FT_Exit52 (KERNEL32.@)
713 void WINAPI
FT_Exit52(CONTEXT86
*context
) { FT_Exit(context
, 52); }
715 /***********************************************************************
716 * FT_Exit56 (KERNEL32.@)
718 void WINAPI
FT_Exit56(CONTEXT86
*context
) { FT_Exit(context
, 56); }
720 /***********************************************************************
721 * ThunkInitLS (KERNEL32.43)
722 * A thunkbuffer link routine
723 * The thunkbuf looks like:
725 * 00: DWORD length ? don't know exactly
726 * 04: SEGPTR ptr ? where does it point to?
727 * The pointer ptr is written into the first DWORD of 'thunk'.
728 * (probably correctly implemented)
731 * segmented pointer to thunk?
733 DWORD WINAPI
ThunkInitLS(
734 LPDWORD thunk
, /* [in] win32 thunk */
735 LPCSTR thkbuf
, /* [in] thkbuffer name in win16 dll */
736 DWORD len
, /* [in] thkbuffer length */
737 LPCSTR dll16
, /* [in] name of win16 dll */
738 LPCSTR dll32
/* [in] name of win32 dll (FIXME: not used?) */
742 if (!(addr
= _loadthunk( dll16
, thkbuf
, dll32
, NULL
, len
)))
747 *(DWORD
*)thunk
= addr
[1];
752 /***********************************************************************
753 * Common32ThkLS (KERNEL32.45)
755 * This is another 32->16 thunk, independent of the QT_Thunk/FT_Thunk
756 * style thunks. The basic difference is that the parameter conversion
757 * is done completely on the *16-bit* side here. Thus we do not call
758 * the 16-bit target directly, but call a common entry point instead.
759 * This entry function then calls the target according to the target
760 * number passed in the DI register.
762 * Input: EAX SEGPTR to the common 16-bit entry point
763 * CX offset in thunk table (target number * 4)
764 * DX error return value if execution fails (unclear???)
765 * EDX.HI number of DWORD parameters
767 * (Note that we need to move the thunk table offset from CX to DI !)
769 * The called 16-bit stub expects its stack to look like this:
771 * (esp+40) 32-bit arguments
773 * (esp+8) 32 byte of stack space available as buffer
774 * (esp) 8 byte return address for use with 0x66 lret
776 * The called 16-bit stub uses a 0x66 lret to return to 32-bit code,
777 * and uses the EAX register to return a DWORD return value.
778 * Thus we need to use a special assembly glue routine
779 * (CallRegisterLongProc instead of CallRegisterShortProc).
781 * Finally, we return to the caller, popping the arguments off
782 * the stack. The number of arguments to be popped is returned
783 * in the BL register by the called 16-bit routine.
786 void WINAPI
Common32ThkLS( CONTEXT86
*context
)
791 memcpy(&context16
,context
,sizeof(context16
));
793 context16
.SegFs
= wine_get_fs();
794 context16
.SegGs
= wine_get_gs();
795 context16
.Edi
= LOWORD(context
->Ecx
);
796 context16
.SegCs
= HIWORD(context
->Eax
);
797 context16
.Eip
= LOWORD(context
->Eax
);
798 context16
.Ebp
= OFFSETOF( NtCurrentTeb()->cur_stack
)
799 + (WORD
)&((STACK16FRAME
*)0)->bp
;
801 argsize
= HIWORD(context
->Edx
) * 4;
803 /* FIXME: hack for stupid USER32 CallbackGlueLS routine */
804 if (context
->Edx
== context
->Eip
)
807 /* Note: the first 32 bytes we copy are just garbage from the 32-bit stack, in order to reserve
808 * the space. It is safe to do that since the register function prefix has reserved
809 * a lot more space than that below context->Esp.
811 WOWCallback16Ex( 0, WCB16_REGS
, argsize
+ 32, (LPBYTE
)context
->Esp
- 32, (DWORD
*)&context16
);
812 context
->Eax
= context16
.Eax
;
814 /* Clean up caller's stack frame */
815 context
->Esp
+= LOBYTE(context16
.Ebx
);
818 /***********************************************************************
819 * OT_32ThkLSF (KERNEL32.40)
821 * YET Another 32->16 thunk. The difference to Common32ThkLS is that
822 * argument processing is done on both the 32-bit and the 16-bit side:
823 * The 32-bit side prepares arguments, copying them onto the stack.
825 * When this routine is called, the first word on the stack is the
826 * number of argument bytes prepared by the 32-bit code, and EDX
827 * contains the 16-bit target address.
829 * The called 16-bit routine is another relaycode, doing further
830 * argument processing and then calling the real 16-bit target
831 * whose address is stored at [bp-04].
833 * The call proceeds using a normal CallRegisterShortProc.
834 * After return from the 16-bit relaycode, the arguments need
835 * to be copied *back* to the 32-bit stack, since the 32-bit
836 * relaycode processes output parameters.
838 * Note that we copy twice the number of arguments, since some of the
839 * 16-bit relaycodes in SYSTHUNK.DLL directly access the original
840 * arguments of the caller!
842 * (Note that this function seems only to be used for
843 * OLECLI32 -> OLECLI and OLESVR32 -> OLESVR thunking.)
845 void WINAPI
OT_32ThkLSF( CONTEXT86
*context
)
850 memcpy(&context16
,context
,sizeof(context16
));
852 context16
.SegFs
= wine_get_fs();
853 context16
.SegGs
= wine_get_gs();
854 context16
.SegCs
= HIWORD(context
->Edx
);
855 context16
.Eip
= LOWORD(context
->Edx
);
856 context16
.Ebp
= OFFSETOF( NtCurrentTeb()->cur_stack
)
857 + (WORD
)&((STACK16FRAME
*)0)->bp
;
859 argsize
= 2 * *(WORD
*)context
->Esp
+ 2;
861 WOWCallback16Ex( 0, WCB16_REGS
, argsize
, (void *)context
->Esp
, (DWORD
*)&context16
);
862 context
->Eax
= context16
.Eax
;
863 context
->Edx
= context16
.Edx
;
865 /* Copy modified buffers back to 32-bit stack */
866 memcpy( (LPBYTE
)context
->Esp
,
867 (LPBYTE
)CURRENT_STACK16
- argsize
, argsize
);
869 context
->Esp
+= LOWORD(context16
.Esp
) -
870 ( OFFSETOF( NtCurrentTeb()->cur_stack
) - argsize
);
873 /***********************************************************************
874 * ThunkInitLSF (KERNEL32.41)
875 * A thunk setup routine.
876 * Expects a pointer to a preinitialized thunkbuffer in the first argument
878 *| 00..03: unknown (pointer, check _41, _43, _46)
879 *| 04: EB1E jmp +0x20
881 *| 06..23: unknown (space for replacement code, check .90)
883 *| 24:>E800000000 call offset 29
884 *| 29:>58 pop eax ( target of call )
885 *| 2A: 2D25000000 sub eax,0x00000025 ( now points to offset 4 )
886 *| 2F: BAxxxxxxxx mov edx,xxxxxxxx
887 *| 34: 68yyyyyyyy push KERNEL32.90
890 *| 3A: EB1E jmp +0x20
891 *| 3E ... 59: unknown (space for replacement code?)
892 *| 5A: E8xxxxxxxx call <32bitoffset xxxxxxxx>
894 *| 60: 81EA25xxxxxx sub edx, 0x25xxxxxx
896 *| 67: 68xxxxxxxx push xxxxxxxx
897 *| 6C: 68yyyyyyyy push KERNEL32.89
900 * This function checks if the code is there, and replaces the yyyyyyyy entries
901 * by the functionpointers.
902 * The thunkbuf looks like:
904 *| 00: DWORD length ? don't know exactly
905 *| 04: SEGPTR ptr ? where does it point to?
906 * The segpointer ptr is written into the first DWORD of 'thunk'.
909 * unclear, pointer to win16 thkbuffer?
911 LPVOID WINAPI
ThunkInitLSF(
912 LPBYTE thunk
, /* [in] win32 thunk */
913 LPCSTR thkbuf
, /* [in] thkbuffer name in win16 dll */
914 DWORD len
, /* [in] length of thkbuffer */
915 LPCSTR dll16
, /* [in] name of win16 dll */
916 LPCSTR dll32
/* [in] name of win32 dll */
920 /* FIXME: add checks for valid code ... */
921 /* write pointers to kernel32.89 and kernel32.90 (+ordinal base of 1) */
922 *(DWORD
*)(thunk
+0x35) = (DWORD
)GetProcAddress(kernel32_handle
,(LPSTR
)90);
923 *(DWORD
*)(thunk
+0x6D) = (DWORD
)GetProcAddress(kernel32_handle
,(LPSTR
)89);
926 if (!(addr
= _loadthunk( dll16
, thkbuf
, dll32
, NULL
, len
)))
929 addr2
= MapSL(addr
[1]);
931 *(DWORD
*)thunk
= (DWORD
)addr2
;
936 /***********************************************************************
937 * FT_PrologPrime (KERNEL32.89)
939 * This function is called from the relay code installed by
940 * ThunkInitLSF. It replaces the location from where it was
941 * called by a standard FT_Prolog call stub (which is 'primed'
942 * by inserting the correct target table pointer).
943 * Finally, it calls that stub.
945 * Input: ECX target number + flags (passed through to FT_Prolog)
946 * (ESP) offset of location where target table pointer
947 * is stored, relative to the start of the relay code
948 * (ESP+4) pointer to start of relay code
949 * (this is where the FT_Prolog call stub gets written to)
951 * Note: The two DWORD arguments get popped off the stack.
954 void WINAPI
FT_PrologPrime( CONTEXT86
*context
)
956 DWORD targetTableOffset
;
959 /* Compensate for the fact that the Wine register relay code thought
960 we were being called, although we were in fact jumped to */
963 /* Write FT_Prolog call stub */
964 targetTableOffset
= stack32_pop(context
);
965 relayCode
= (LPBYTE
)stack32_pop(context
);
966 _write_ftprolog( relayCode
, *(DWORD
**)(relayCode
+targetTableOffset
) );
968 /* Jump to the call stub just created */
969 context
->Eip
= (DWORD
)relayCode
;
972 /***********************************************************************
973 * QT_ThunkPrime (KERNEL32.90)
975 * This function corresponds to FT_PrologPrime, but installs a
976 * call stub for QT_Thunk instead.
978 * Input: (EBP-4) target number (passed through to QT_Thunk)
979 * EDX target table pointer location offset
980 * EAX start of relay code
983 void WINAPI
QT_ThunkPrime( CONTEXT86
*context
)
985 DWORD targetTableOffset
;
988 /* Compensate for the fact that the Wine register relay code thought
989 we were being called, although we were in fact jumped to */
992 /* Write QT_Thunk call stub */
993 targetTableOffset
= context
->Edx
;
994 relayCode
= (LPBYTE
)context
->Eax
;
995 _write_qtthunk( relayCode
, *(DWORD
**)(relayCode
+targetTableOffset
) );
997 /* Jump to the call stub just created */
998 context
->Eip
= (DWORD
)relayCode
;
1001 /***********************************************************************
1002 * ThunkInitSL (KERNEL32.46)
1003 * Another thunkbuf link routine.
1004 * The start of the thunkbuf looks like this:
1006 * 04: SEGPTR address for thunkbuffer pointer
1009 VOID WINAPI
ThunkInitSL(
1010 LPBYTE thunk
, /* [in] start of thunkbuffer */
1011 LPCSTR thkbuf
, /* [in] name/ordinal of thunkbuffer in win16 dll */
1012 DWORD len
, /* [in] length of thunkbuffer */
1013 LPCSTR dll16
, /* [in] name of win16 dll containing the thkbuf */
1014 LPCSTR dll32
/* [in] win32 dll. FIXME: strange, unused */
1018 if (!(addr
= _loadthunk( dll16
, thkbuf
, dll32
, NULL
, len
)))
1021 *(DWORD
*)MapSL(addr
[1]) = (DWORD
)thunk
;
1024 /**********************************************************************
1025 * SSInit (KERNEL.700)
1029 BOOL WINAPI
SSInit16(void)
1034 /**********************************************************************
1035 * SSOnBigStack (KERNEL32.87)
1036 * Check if thunking is initialized (ss selector set up etc.)
1037 * We do that differently, so just return TRUE.
1042 BOOL WINAPI
SSOnBigStack()
1044 TRACE("Yes, thunking is initialized\n");
1048 /**********************************************************************
1049 * SSConfirmSmallStack (KERNEL.704)
1051 * Abort if not on small stack.
1053 * This must be a register routine as it has to preserve *all* registers.
1055 void WINAPI
SSConfirmSmallStack( CONTEXT86
*context
)
1057 /* We are always on the small stack while in 16-bit code ... */
1060 /**********************************************************************
1061 * SSCall (KERNEL32.88)
1062 * One of the real thunking functions. This one seems to be for 32<->32
1063 * thunks. It should probably be capable of crossing processboundaries.
1065 * And YES, I've seen nr=48 (somewhere in the Win95 32<->16 OLE coupling)
1068 DWORD WINAPIV
SSCall(
1069 DWORD nr
, /* [in] number of argument bytes */
1070 DWORD flags
, /* [in] FIXME: flags ? */
1071 FARPROC fun
, /* [in] function to call */
1072 ... /* [in/out] arguments */
1075 DWORD
*args
= ((DWORD
*)&fun
) + 1;
1079 DPRINTF("(%ld,0x%08lx,%p,[",nr
,flags
,fun
);
1080 for (i
=0;i
<nr
/4;i
++)
1081 DPRINTF("0x%08lx,",args
[i
]);
1085 case 0: ret
= fun();
1087 case 4: ret
= fun(args
[0]);
1089 case 8: ret
= fun(args
[0],args
[1]);
1091 case 12: ret
= fun(args
[0],args
[1],args
[2]);
1093 case 16: ret
= fun(args
[0],args
[1],args
[2],args
[3]);
1095 case 20: ret
= fun(args
[0],args
[1],args
[2],args
[3],args
[4]);
1097 case 24: ret
= fun(args
[0],args
[1],args
[2],args
[3],args
[4],args
[5]);
1099 case 28: ret
= fun(args
[0],args
[1],args
[2],args
[3],args
[4],args
[5],args
[6]);
1101 case 32: ret
= fun(args
[0],args
[1],args
[2],args
[3],args
[4],args
[5],args
[6],args
[7]);
1103 case 36: ret
= fun(args
[0],args
[1],args
[2],args
[3],args
[4],args
[5],args
[6],args
[7],args
[8]);
1105 case 40: ret
= fun(args
[0],args
[1],args
[2],args
[3],args
[4],args
[5],args
[6],args
[7],args
[8],args
[9]);
1107 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]);
1109 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]);
1112 WARN("Unsupported nr of arguments, %ld\n",nr
);
1117 TRACE(" returning %ld ...\n",ret
);
1121 /**********************************************************************
1122 * W32S_BackTo32 (KERNEL32.51)
1124 void WINAPI
W32S_BackTo32( CONTEXT86
*context
)
1126 LPDWORD stack
= (LPDWORD
)context
->Esp
;
1127 FARPROC proc
= (FARPROC
)context
->Eip
;
1129 context
->Eax
= proc( stack
[1], stack
[2], stack
[3], stack
[4], stack
[5],
1130 stack
[6], stack
[7], stack
[8], stack
[9], stack
[10] );
1132 context
->Eip
= stack32_pop(context
);
1135 /**********************************************************************
1136 * AllocSLCallback (KERNEL32.@)
1139 * Win95 uses some structchains for callbacks. It allocates them
1140 * in blocks of 100 entries, size 32 bytes each, layout:
1142 *| 0: PTR nextblockstart
1144 *| 8: WORD sel ( start points to blockstart)
1148 *| 18: PDB *owning_process;
1149 *| 1C: PTR blockstart
1151 * We ignore this for now. (Just a note for further developers)
1152 * FIXME: use this method, so we don't waste selectors...
1154 * Following code is then generated by AllocSLCallback. The code is 16 bit, so
1155 * the 0x66 prefix switches from word->long registers.
1158 *| 6668x arg2 x pushl <arg2>
1160 *| EAx arg1 x jmpf <arg1>
1162 * returns the startaddress of this thunk.
1164 * Note, that they look very similar to the ones allocates by THUNK_Alloc.
1166 * A segmented pointer to the start of the thunk
1170 DWORD finalizer
, /* [in] Finalizer function */
1171 DWORD callback
/* [in] Callback function */
1173 LPBYTE x
,thunk
= HeapAlloc( GetProcessHeap(), 0, 32 );
1177 *x
++=0x66;*x
++=0x5a; /* popl edx */
1178 *x
++=0x66;*x
++=0x68;*(DWORD
*)x
=finalizer
;x
+=4; /* pushl finalizer */
1179 *x
++=0x66;*x
++=0x52; /* pushl edx */
1180 *x
++=0xea;*(DWORD
*)x
=callback
;x
+=4; /* jmpf callback */
1182 *(DWORD
*)(thunk
+18) = GetCurrentProcessId();
1184 sel
= SELECTOR_AllocBlock( thunk
, 32, WINE_LDT_FLAGS_CODE
);
1188 /**********************************************************************
1189 * FreeSLCallback (KERNEL32.@)
1190 * Frees the specified 16->32 callback
1194 DWORD x
/* [in] 16 bit callback (segmented pointer?) */
1196 FIXME("(0x%08lx): stub\n",x
);
1200 /**********************************************************************
1201 * GetTEBSelectorFS (KERNEL.475)
1202 * Set the 16-bit %fs to the 32-bit %fs (current TEB selector)
1204 void WINAPI
GetTEBSelectorFS16(void)
1206 CURRENT_STACK16
->fs
= wine_get_fs();
1209 /**********************************************************************
1210 * IsPeFormat (KERNEL.431)
1212 * Determine if a file is a PE format executable.
1216 * FALSE if the file could not be opened or is not a PE file.
1219 * If fn is given as NULL then the function expects hf16 to be valid.
1221 BOOL16 WINAPI
IsPeFormat16(
1222 LPSTR fn
, /* [in] Filename to the executeable */
1223 HFILE16 hf16
) /* [in] An open file handle */
1226 IMAGE_DOS_HEADER mzh
;
1230 if (fn
) hf16
= OpenFile16(fn
,&ofs
,OF_READ
);
1231 if (hf16
== HFILE_ERROR16
) return FALSE
;
1232 _llseek16(hf16
,0,SEEK_SET
);
1233 if (sizeof(mzh
)!=_lread16(hf16
,&mzh
,sizeof(mzh
))) goto done
;
1234 if (mzh
.e_magic
!=IMAGE_DOS_SIGNATURE
) goto done
;
1235 _llseek16(hf16
,mzh
.e_lfanew
,SEEK_SET
);
1236 if (sizeof(DWORD
)!=_lread16(hf16
,&xmagic
,sizeof(DWORD
))) goto done
;
1237 ret
= (xmagic
== IMAGE_NT_SIGNATURE
);
1244 /***********************************************************************
1245 * K32Thk1632Prolog (KERNEL32.@)
1247 void WINAPI
K32Thk1632Prolog( CONTEXT86
*context
)
1249 LPBYTE code
= (LPBYTE
)context
->Eip
- 5;
1251 /* Arrrgh! SYSTHUNK.DLL just has to re-implement another method
1252 of 16->32 thunks instead of using one of the standard methods!
1253 This means that SYSTHUNK.DLL itself switches to a 32-bit stack,
1254 and does a far call to the 32-bit code segment of OLECLI32/OLESVR32.
1255 Unfortunately, our CallTo/CallFrom mechanism is therefore completely
1256 bypassed, which means it will crash the next time the 32-bit OLE
1257 code thunks down again to 16-bit (this *will* happen!).
1259 The following hack tries to recognize this situation.
1260 This is possible since the called stubs in OLECLI32/OLESVR32 all
1261 look exactly the same:
1262 00 E8xxxxxxxx call K32Thk1632Prolog
1263 05 FF55FC call [ebp-04]
1264 08 E8xxxxxxxx call K32Thk1632Epilog
1267 If we recognize this situation, we try to simulate the actions
1268 of our CallTo/CallFrom mechanism by copying the 16-bit stack
1269 to our 32-bit stack, creating a proper STACK16FRAME and
1270 updating cur_stack. */
1272 if ( code
[5] == 0xFF && code
[6] == 0x55 && code
[7] == 0xFC
1273 && code
[13] == 0x66 && code
[14] == 0xCB)
1275 WORD stackSel
= NtCurrentTeb()->stack_sel
;
1276 DWORD stackBase
= GetSelectorBase(stackSel
);
1278 DWORD argSize
= context
->Ebp
- context
->Esp
;
1279 char *stack16
= (char *)context
->Esp
- 4;
1280 char *stack32
= (char *)NtCurrentTeb()->cur_stack
- argSize
;
1281 STACK16FRAME
*frame16
= (STACK16FRAME
*)stack16
- 1;
1283 TRACE("before SYSTHUNK hack: EBP: %08lx ESP: %08lx cur_stack: %08lx\n",
1284 context
->Ebp
, context
->Esp
, NtCurrentTeb()->cur_stack
);
1286 memset(frame16
, '\0', sizeof(STACK16FRAME
));
1287 frame16
->frame32
= (STACK32FRAME
*)NtCurrentTeb()->cur_stack
;
1288 frame16
->ebp
= context
->Ebp
;
1290 memcpy(stack32
, stack16
, argSize
);
1291 NtCurrentTeb()->cur_stack
= MAKESEGPTR(stackSel
, (DWORD
)frame16
- stackBase
);
1293 context
->Esp
= (DWORD
)stack32
+ 4;
1294 context
->Ebp
= context
->Esp
+ argSize
;
1296 TRACE("after SYSTHUNK hack: EBP: %08lx ESP: %08lx cur_stack: %08lx\n",
1297 context
->Ebp
, context
->Esp
, NtCurrentTeb()->cur_stack
);
1300 /* entry_point is never used again once the entry point has
1301 been called. Thus we re-use it to hold the Win16Lock count */
1302 ReleaseThunkLock(&CURRENT_STACK16
->entry_point
);
1305 /***********************************************************************
1306 * K32Thk1632Epilog (KERNEL32.@)
1308 void WINAPI
K32Thk1632Epilog( CONTEXT86
*context
)
1310 LPBYTE code
= (LPBYTE
)context
->Eip
- 13;
1312 RestoreThunkLock(CURRENT_STACK16
->entry_point
);
1314 /* We undo the SYSTHUNK hack if necessary. See K32Thk1632Prolog. */
1316 if ( code
[5] == 0xFF && code
[6] == 0x55 && code
[7] == 0xFC
1317 && code
[13] == 0x66 && code
[14] == 0xCB)
1319 STACK16FRAME
*frame16
= MapSL(NtCurrentTeb()->cur_stack
);
1320 char *stack16
= (char *)(frame16
+ 1);
1321 DWORD argSize
= frame16
->ebp
- (DWORD
)stack16
;
1322 char *stack32
= (char *)frame16
->frame32
- argSize
;
1324 DWORD nArgsPopped
= context
->Esp
- (DWORD
)stack32
;
1326 TRACE("before SYSTHUNK hack: EBP: %08lx ESP: %08lx cur_stack: %08lx\n",
1327 context
->Ebp
, context
->Esp
, NtCurrentTeb()->cur_stack
);
1329 NtCurrentTeb()->cur_stack
= (DWORD
)frame16
->frame32
;
1331 context
->Esp
= (DWORD
)stack16
+ nArgsPopped
;
1332 context
->Ebp
= frame16
->ebp
;
1334 TRACE("after SYSTHUNK hack: EBP: %08lx ESP: %08lx cur_stack: %08lx\n",
1335 context
->Ebp
, context
->Esp
, NtCurrentTeb()->cur_stack
);
1339 /*********************************************************************
1340 * PK16FNF [KERNEL32.91]
1342 * This routine fills in the supplied 13-byte (8.3 plus terminator)
1343 * string buffer with the 8.3 filename of a recently loaded 16-bit
1344 * module. It is unknown exactly what modules trigger this
1345 * mechanism or what purpose this serves. Win98 Explorer (and
1346 * probably also Win95 with IE 4 shell integration) calls this
1347 * several times during initialization.
1349 * FIXME: find out what this really does and make it work.
1351 void WINAPI
PK16FNF(LPSTR strPtr
)
1353 FIXME("(%p): stub\n", strPtr
);
1355 /* fill in a fake filename that'll be easy to recognize */
1356 strcpy(strPtr
, "WINESTUB.FIX");
1359 /***********************************************************************
1360 * 16->32 Flat Thunk routines:
1363 /***********************************************************************
1364 * ThunkConnect16 (KERNEL.651)
1365 * Connects a 32bit and a 16bit thunkbuffer.
1367 UINT WINAPI
ThunkConnect16(
1368 LPSTR module16
, /* [in] name of win16 dll */
1369 LPSTR module32
, /* [in] name of win32 dll */
1370 HINSTANCE16 hInst16
, /* [in] hInst of win16 dll */
1371 DWORD dwReason
, /* [in] initialisation argument */
1372 struct ThunkDataCommon
*TD
, /* [in/out] thunkbuffer */
1373 LPSTR thunkfun32
, /* [in] win32 thunkfunction */
1374 WORD cs
/* [in] CS of win16 dll */
1378 if (!strncmp(TD
->magic
, "SL01", 4))
1382 TRACE("SL01 thunk %s (%lx) -> %s (%s), Reason: %ld\n",
1383 module16
, (DWORD
)TD
, module32
, thunkfun32
, dwReason
);
1385 else if (!strncmp(TD
->magic
, "LS01", 4))
1387 directionSL
= FALSE
;
1389 TRACE("LS01 thunk %s (%lx) <- %s (%s), Reason: %ld\n",
1390 module16
, (DWORD
)TD
, module32
, thunkfun32
, dwReason
);
1394 ERR("Invalid magic %c%c%c%c\n",
1395 TD
->magic
[0], TD
->magic
[1], TD
->magic
[2], TD
->magic
[3]);
1401 case DLL_PROCESS_ATTACH
:
1404 struct ThunkDataSL16
*SL16
= (struct ThunkDataSL16
*)TD
;
1405 struct ThunkDataSL
*SL
= SL16
->fpData
;
1409 SL
= HeapAlloc(GetProcessHeap(), 0, sizeof(*SL
));
1411 SL
->common
= SL16
->common
;
1412 SL
->flags1
= SL16
->flags1
;
1413 SL
->flags2
= SL16
->flags2
;
1415 SL
->apiDB
= MapSL(SL16
->apiDatabase
);
1416 SL
->targetDB
= NULL
;
1418 lstrcpynA(SL
->pszDll16
, module16
, 255);
1419 lstrcpynA(SL
->pszDll32
, module32
, 255);
1421 /* We should create a SEGPTR to the ThunkDataSL,
1422 but since the contents are not in the original format,
1423 any access to this by 16-bit code would crash anyway. */
1429 if (SL
->flags2
& 0x80000000)
1431 TRACE("Preloading 32-bit library\n");
1432 LoadLibraryA(module32
);
1441 case DLL_PROCESS_DETACH
:
1442 /* FIXME: cleanup */
1450 /***********************************************************************
1451 * C16ThkSL (KERNEL.630)
1454 void WINAPI
C16ThkSL(CONTEXT86
*context
)
1456 LPBYTE stub
= MapSL(context
->Eax
), x
= stub
;
1457 WORD cs
= wine_get_cs();
1458 WORD ds
= wine_get_ds();
1460 /* We produce the following code:
1465 * mov edx, es:[ecx + $EDX]
1470 * call __FLATCS:__wine_call_from_16_thunk
1473 *x
++ = 0xB8; *((WORD
*)x
)++ = ds
;
1474 *x
++ = 0x8E; *x
++ = 0xC0;
1475 *x
++ = 0x66; *x
++ = 0x0F; *x
++ = 0xB7; *x
++ = 0xC9;
1476 *x
++ = 0x67; *x
++ = 0x66; *x
++ = 0x26; *x
++ = 0x8B;
1477 *x
++ = 0x91; *((DWORD
*)x
)++ = context
->Edx
;
1480 *x
++ = 0x66; *x
++ = 0x52;
1482 *x
++ = 0x66; *x
++ = 0x52;
1483 *x
++ = 0x66; *x
++ = 0x9A; *((DWORD
*)x
)++ = (DWORD
)__wine_call_from_16_thunk
;
1484 *((WORD
*)x
)++ = cs
;
1486 /* Jump to the stub code just created */
1487 context
->Eip
= LOWORD(context
->Eax
);
1488 context
->SegCs
= HIWORD(context
->Eax
);
1490 /* Since C16ThkSL got called by a jmp, we need to leave the
1491 original return address on the stack */
1495 /***********************************************************************
1496 * C16ThkSL01 (KERNEL.631)
1499 void WINAPI
C16ThkSL01(CONTEXT86
*context
)
1501 LPBYTE stub
= MapSL(context
->Eax
), x
= stub
;
1505 struct ThunkDataSL16
*SL16
= MapSL(context
->Edx
);
1506 struct ThunkDataSL
*td
= SL16
->fpData
;
1508 DWORD procAddress
= (DWORD
)GetProcAddress16(GetModuleHandle16("KERNEL"), (LPCSTR
)631);
1509 WORD cs
= wine_get_cs();
1513 ERR("ThunkConnect16 was not called!\n");
1517 TRACE("Creating stub for ThunkDataSL %08lx\n", (DWORD
)td
);
1520 /* We produce the following code:
1529 * call __FLATCS:__wine_call_from_16_thunk
1532 *x
++ = 0x66; *x
++ = 0x33; *x
++ = 0xC0;
1533 *x
++ = 0x66; *x
++ = 0xBA; *((DWORD
*)x
)++ = (DWORD
)td
;
1534 *x
++ = 0x9A; *((DWORD
*)x
)++ = procAddress
;
1537 *x
++ = 0x66; *x
++ = 0x52;
1539 *x
++ = 0x66; *x
++ = 0x52;
1540 *x
++ = 0x66; *x
++ = 0x9A; *((DWORD
*)x
)++ = (DWORD
)__wine_call_from_16_thunk
;
1541 *((WORD
*)x
)++ = cs
;
1543 /* Jump to the stub code just created */
1544 context
->Eip
= LOWORD(context
->Eax
);
1545 context
->SegCs
= HIWORD(context
->Eax
);
1547 /* Since C16ThkSL01 got called by a jmp, we need to leave the
1548 orginal return address on the stack */
1553 struct ThunkDataSL
*td
= (struct ThunkDataSL
*)context
->Edx
;
1554 DWORD targetNr
= LOWORD(context
->Ecx
) / 4;
1555 struct SLTargetDB
*tdb
;
1557 TRACE("Process %08lx calling target %ld of ThunkDataSL %08lx\n",
1558 GetCurrentProcessId(), targetNr
, (DWORD
)td
);
1560 for (tdb
= td
->targetDB
; tdb
; tdb
= tdb
->next
)
1561 if (tdb
->process
== GetCurrentProcessId())
1566 TRACE("Loading 32-bit library %s\n", td
->pszDll32
);
1567 LoadLibraryA(td
->pszDll32
);
1569 for (tdb
= td
->targetDB
; tdb
; tdb
= tdb
->next
)
1570 if (tdb
->process
== GetCurrentProcessId())
1576 context
->Edx
= tdb
->targetTable
[targetNr
];
1578 TRACE("Call target is %08lx\n", context
->Edx
);
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;
1589 ERR("Process %08lx did not ThunkConnect32 %s to %s\n",
1590 GetCurrentProcessId(), td
->pszDll32
, td
->pszDll16
);
1596 /***********************************************************************
1597 * 16<->32 Thunklet/Callback API:
1600 #include "pshpack1.h"
1601 typedef struct _THUNKLET
1616 struct _THUNKLET
*next
;
1618 #include "poppack.h"
1620 #define THUNKLET_TYPE_LS 1
1621 #define THUNKLET_TYPE_SL 2
1623 static HANDLE ThunkletHeap
= 0;
1624 static WORD ThunkletCodeSel
;
1625 static THUNKLET
*ThunkletAnchor
= NULL
;
1627 static FARPROC ThunkletSysthunkGlueLS
= 0;
1628 static SEGPTR ThunkletSysthunkGlueSL
= 0;
1630 static FARPROC ThunkletCallbackGlueLS
= 0;
1631 static SEGPTR ThunkletCallbackGlueSL
= 0;
1634 /* map a thunk allocated on ThunkletHeap to a 16-bit pointer */
1635 inline static SEGPTR
get_segptr( void *thunk
)
1637 if (!thunk
) return 0;
1638 return MAKESEGPTR( ThunkletCodeSel
, (char *)thunk
- (char *)ThunkletHeap
);
1641 /***********************************************************************
1644 static BOOL
THUNK_Init(void)
1648 ThunkletHeap
= HeapCreate( 0, 0x10000, 0x10000 );
1649 if (!ThunkletHeap
) return FALSE
;
1651 ThunkletCodeSel
= SELECTOR_AllocBlock( (void *)ThunkletHeap
, 0x10000, WINE_LDT_FLAGS_CODE
);
1653 thunk
= HeapAlloc( ThunkletHeap
, 0, 5 );
1654 if (!thunk
) return FALSE
;
1656 ThunkletSysthunkGlueLS
= (FARPROC
)thunk
;
1657 *thunk
++ = 0x58; /* popl eax */
1658 *thunk
++ = 0xC3; /* ret */
1660 ThunkletSysthunkGlueSL
= get_segptr( thunk
);
1661 *thunk
++ = 0x66; *thunk
++ = 0x58; /* popl eax */
1662 *thunk
++ = 0xCB; /* lret */
1667 /***********************************************************************
1668 * SetThunkletCallbackGlue (KERNEL.560)
1670 void WINAPI
SetThunkletCallbackGlue16( FARPROC glueLS
, SEGPTR glueSL
)
1672 ThunkletCallbackGlueLS
= glueLS
;
1673 ThunkletCallbackGlueSL
= glueSL
;
1677 /***********************************************************************
1678 * THUNK_FindThunklet
1680 THUNKLET
*THUNK_FindThunklet( DWORD target
, DWORD relay
,
1681 DWORD glue
, BYTE type
)
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
) ) )
1697 /***********************************************************************
1698 * THUNK_AllocLSThunklet
1700 FARPROC
THUNK_AllocLSThunklet( SEGPTR target
, DWORD relay
,
1701 FARPROC glue
, HTASK16 owner
)
1703 THUNKLET
*thunk
= THUNK_FindThunklet( (DWORD
)target
, relay
, (DWORD
)glue
,
1707 TDB
*pTask
= GlobalLock16( owner
);
1709 if (!ThunkletHeap
) THUNK_Init();
1710 if ( !(thunk
= HeapAlloc( ThunkletHeap
, 0, sizeof(THUNKLET
) )) )
1713 thunk
->prefix_target
= thunk
->prefix_relay
= 0x90;
1714 thunk
->pushl_target
= thunk
->pushl_relay
= 0x68;
1715 thunk
->jmp_glue
= 0xE9;
1717 thunk
->target
= (DWORD
)target
;
1718 thunk
->relay
= (DWORD
)relay
;
1719 thunk
->glue
= (DWORD
)glue
- (DWORD
)&thunk
->type
;
1721 thunk
->type
= THUNKLET_TYPE_LS
;
1722 thunk
->owner
= pTask
? pTask
->hInstance
: 0;
1724 thunk
->next
= ThunkletAnchor
;
1725 ThunkletAnchor
= thunk
;
1728 return (FARPROC
)thunk
;
1731 /***********************************************************************
1732 * THUNK_AllocSLThunklet
1734 SEGPTR
THUNK_AllocSLThunklet( FARPROC target
, DWORD relay
,
1735 SEGPTR glue
, HTASK16 owner
)
1737 THUNKLET
*thunk
= THUNK_FindThunklet( (DWORD
)target
, relay
, (DWORD
)glue
,
1741 TDB
*pTask
= GlobalLock16( owner
);
1743 if (!ThunkletHeap
) THUNK_Init();
1744 if ( !(thunk
= HeapAlloc( ThunkletHeap
, 0, sizeof(THUNKLET
) )) )
1747 thunk
->prefix_target
= thunk
->prefix_relay
= 0x66;
1748 thunk
->pushl_target
= thunk
->pushl_relay
= 0x68;
1749 thunk
->jmp_glue
= 0xEA;
1751 thunk
->target
= (DWORD
)target
;
1752 thunk
->relay
= (DWORD
)relay
;
1753 thunk
->glue
= (DWORD
)glue
;
1755 thunk
->type
= THUNKLET_TYPE_SL
;
1756 thunk
->owner
= pTask
? pTask
->hInstance
: 0;
1758 thunk
->next
= ThunkletAnchor
;
1759 ThunkletAnchor
= thunk
;
1762 return get_segptr( thunk
);
1765 /**********************************************************************
1768 BOOL16 WINAPI
IsLSThunklet( THUNKLET
*thunk
)
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
;
1775 /**********************************************************************
1776 * IsSLThunklet (KERNEL.612)
1778 BOOL16 WINAPI
IsSLThunklet16( THUNKLET
*thunk
)
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
;
1787 /***********************************************************************
1788 * AllocLSThunkletSysthunk (KERNEL.607)
1790 FARPROC WINAPI
AllocLSThunkletSysthunk16( SEGPTR target
,
1791 FARPROC relay
, DWORD dummy
)
1793 if (!ThunkletSysthunkGlueLS
) THUNK_Init();
1794 return THUNK_AllocLSThunklet( (SEGPTR
)relay
, (DWORD
)target
,
1795 ThunkletSysthunkGlueLS
, GetCurrentTask() );
1798 /***********************************************************************
1799 * AllocSLThunkletSysthunk (KERNEL.608)
1801 SEGPTR WINAPI
AllocSLThunkletSysthunk16( FARPROC target
,
1802 SEGPTR relay
, DWORD dummy
)
1804 if (!ThunkletSysthunkGlueSL
) THUNK_Init();
1805 return THUNK_AllocSLThunklet( (FARPROC
)relay
, (DWORD
)target
,
1806 ThunkletSysthunkGlueSL
, GetCurrentTask() );
1810 /***********************************************************************
1811 * AllocLSThunkletCallbackEx (KERNEL.567)
1813 FARPROC WINAPI
AllocLSThunkletCallbackEx16( SEGPTR target
,
1814 DWORD relay
, HTASK16 task
)
1816 THUNKLET
*thunk
= MapSL( target
);
1817 if ( !thunk
) return NULL
;
1819 if ( IsSLThunklet16( thunk
) && thunk
->relay
== relay
1820 && thunk
->glue
== (DWORD
)ThunkletCallbackGlueSL
)
1821 return (FARPROC
)thunk
->target
;
1823 return THUNK_AllocLSThunklet( target
, relay
,
1824 ThunkletCallbackGlueLS
, task
);
1827 /***********************************************************************
1828 * AllocSLThunkletCallbackEx (KERNEL.568)
1830 SEGPTR WINAPI
AllocSLThunkletCallbackEx16( FARPROC target
,
1831 DWORD relay
, HTASK16 task
)
1833 THUNKLET
*thunk
= (THUNKLET
*)target
;
1834 if ( !thunk
) return 0;
1836 if ( IsLSThunklet( thunk
) && thunk
->relay
== relay
1837 && thunk
->glue
== (DWORD
)ThunkletCallbackGlueLS
- (DWORD
)&thunk
->type
)
1838 return (SEGPTR
)thunk
->target
;
1840 return THUNK_AllocSLThunklet( target
, relay
,
1841 ThunkletCallbackGlueSL
, task
);
1844 /***********************************************************************
1845 * AllocLSThunkletCallback (KERNEL.561)
1846 * AllocLSThunkletCallback_dup (KERNEL.606)
1848 FARPROC WINAPI
AllocLSThunkletCallback16( SEGPTR target
, DWORD relay
)
1850 return AllocLSThunkletCallbackEx16( target
, relay
, GetCurrentTask() );
1853 /***********************************************************************
1854 * AllocSLThunkletCallback (KERNEL.562)
1855 * AllocSLThunkletCallback_dup (KERNEL.605)
1857 SEGPTR WINAPI
AllocSLThunkletCallback16( FARPROC target
, DWORD relay
)
1859 return AllocSLThunkletCallbackEx16( target
, relay
, GetCurrentTask() );
1862 /***********************************************************************
1863 * FindLSThunkletCallback (KERNEL.563)
1864 * FindLSThunkletCallback_dup (KERNEL.609)
1866 FARPROC WINAPI
FindLSThunkletCallback( SEGPTR target
, DWORD relay
)
1868 THUNKLET
*thunk
= MapSL( target
);
1869 if ( thunk
&& IsSLThunklet16( thunk
) && thunk
->relay
== relay
1870 && thunk
->glue
== (DWORD
)ThunkletCallbackGlueSL
)
1871 return (FARPROC
)thunk
->target
;
1873 thunk
= THUNK_FindThunklet( (DWORD
)target
, relay
,
1874 (DWORD
)ThunkletCallbackGlueLS
,
1876 return (FARPROC
)thunk
;
1879 /***********************************************************************
1880 * FindSLThunkletCallback (KERNEL.564)
1881 * FindSLThunkletCallback_dup (KERNEL.610)
1883 SEGPTR WINAPI
FindSLThunkletCallback( FARPROC target
, DWORD relay
)
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
;
1890 thunk
= THUNK_FindThunklet( (DWORD
)target
, relay
,
1891 (DWORD
)ThunkletCallbackGlueSL
,
1893 return get_segptr( thunk
);
1897 /***********************************************************************
1898 * FreeThunklet (KERNEL.611)
1900 BOOL16 WINAPI
FreeThunklet16( DWORD unused1
, DWORD unused2
)
1906 /***********************************************************************
1907 * Callback Client API
1910 #define N_CBC_FIXED 20
1911 #define N_CBC_VARIABLE 10
1912 #define N_CBC_TOTAL (N_CBC_FIXED + N_CBC_VARIABLE)
1914 static SEGPTR CBClientRelay16
[ N_CBC_TOTAL
];
1915 static FARPROC
*CBClientRelay32
[ N_CBC_TOTAL
];
1917 /***********************************************************************
1918 * RegisterCBClient (KERNEL.619)
1920 INT16 WINAPI
RegisterCBClient16( INT16 wCBCId
,
1921 SEGPTR relay16
, FARPROC
*relay32
)
1923 /* Search for free Callback ID */
1925 for ( wCBCId
= N_CBC_FIXED
; wCBCId
< N_CBC_TOTAL
; wCBCId
++ )
1926 if ( !CBClientRelay16
[ wCBCId
] )
1929 /* Register Callback ID */
1930 if ( wCBCId
> 0 && wCBCId
< N_CBC_TOTAL
)
1932 CBClientRelay16
[ wCBCId
] = relay16
;
1933 CBClientRelay32
[ wCBCId
] = relay32
;
1941 /***********************************************************************
1942 * UnRegisterCBClient (KERNEL.622)
1944 INT16 WINAPI
UnRegisterCBClient16( INT16 wCBCId
,
1945 SEGPTR relay16
, FARPROC
*relay32
)
1947 if ( wCBCId
>= N_CBC_FIXED
&& wCBCId
< N_CBC_TOTAL
1948 && CBClientRelay16
[ wCBCId
] == relay16
1949 && CBClientRelay32
[ wCBCId
] == relay32
)
1951 CBClientRelay16
[ wCBCId
] = 0;
1952 CBClientRelay32
[ wCBCId
] = 0;
1961 /***********************************************************************
1962 * InitCBClient (KERNEL.623)
1964 void WINAPI
InitCBClient16( FARPROC glueLS
)
1966 HMODULE16 kernel
= GetModuleHandle16( "KERNEL" );
1967 SEGPTR glueSL
= (SEGPTR
)GetProcAddress16( kernel
, (LPCSTR
)604 );
1969 SetThunkletCallbackGlue16( glueLS
, glueSL
);
1972 /***********************************************************************
1973 * CBClientGlueSL (KERNEL.604)
1975 void WINAPI
CBClientGlueSL( CONTEXT86
*context
)
1977 /* Create stack frame */
1978 SEGPTR stackSeg
= stack16_push( 12 );
1979 LPWORD stackLin
= MapSL( stackSeg
);
1980 SEGPTR glue
, *glueTab
;
1982 stackLin
[3] = (WORD
)context
->Ebp
;
1983 stackLin
[2] = (WORD
)context
->Esi
;
1984 stackLin
[1] = (WORD
)context
->Edi
;
1985 stackLin
[0] = (WORD
)context
->SegDs
;
1987 context
->Ebp
= OFFSETOF( stackSeg
) + 6;
1988 context
->Esp
= OFFSETOF( stackSeg
) - 4;
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
);
1998 /***********************************************************************
1999 * CBClientThunkSL (KERNEL.620)
2001 extern DWORD
CALL32_CBClient( FARPROC proc
, LPWORD args
, DWORD
*esi
);
2002 void WINAPI
CBClientThunkSL( CONTEXT86
*context
)
2004 /* Call 32-bit relay code */
2006 LPWORD args
= MapSL( MAKESEGPTR( context
->SegSs
, LOWORD(context
->Ebp
) ) );
2007 FARPROC proc
= CBClientRelay32
[ args
[2] ][ args
[1] ];
2009 context
->Eax
= CALL32_CBClient( proc
, args
, &context
->Esi
);
2012 /***********************************************************************
2013 * CBClientThunkSLEx (KERNEL.621)
2015 extern DWORD
CALL32_CBClientEx( FARPROC proc
, LPWORD args
, DWORD
*esi
, INT
*nArgs
);
2016 void WINAPI
CBClientThunkSLEx( CONTEXT86
*context
)
2018 /* Call 32-bit relay code */
2020 LPWORD args
= MapSL( MAKESEGPTR( context
->SegSs
, LOWORD(context
->Ebp
) ) );
2021 FARPROC proc
= CBClientRelay32
[ args
[2] ][ args
[1] ];
2025 context
->Eax
= CALL32_CBClientEx( proc
, args
, &context
->Esi
, &nArgs
);
2027 /* Restore registers saved by CBClientGlueSL */
2028 stackLin
= (LPWORD
)((LPBYTE
)CURRENT_STACK16
+ sizeof(STACK16FRAME
) - 4);
2029 context
->Ebp
= (context
->Ebp
& ~0xffff) | stackLin
[3];
2030 context
->Esi
= (context
->Esi
& ~0xffff) | stackLin
[2];
2031 context
->Edi
= (context
->Edi
& ~0xffff) | stackLin
[1];
2032 context
->SegDs
= stackLin
[0];
2033 context
->Esp
+= 16+nArgs
;
2035 /* Return to caller of CBClient thunklet */
2036 context
->SegCs
= stackLin
[9];
2037 context
->Eip
= stackLin
[8];
2041 /***********************************************************************
2042 * Get16DLLAddress (KERNEL32.@)
2044 * This function is used by a Win32s DLL if it wants to call a Win16 function.
2045 * A 16:16 segmented pointer to the function is returned.
2046 * Written without any docu.
2048 SEGPTR WINAPI
Get16DLLAddress(HMODULE16 handle
, LPSTR func_name
)
2050 static WORD code_sel32
;
2056 if (!ThunkletHeap
) THUNK_Init();
2057 code_sel32
= SELECTOR_AllocBlock( (void *)ThunkletHeap
, 0x10000,
2058 WINE_LDT_FLAGS_CODE
| WINE_LDT_FLAGS_32BIT
);
2059 if (!code_sel32
) return 0;
2061 if (!(thunk
= HeapAlloc( ThunkletHeap
, 0, 32 ))) return 0;
2063 if (!handle
) handle
= GetModuleHandle16("WIN32S16");
2064 proc_16
= GetProcAddress16(handle
, func_name
);
2066 /* movl proc_16, $edx */
2068 *(FARPROC16
*)thunk
= proc_16
;
2069 thunk
+= sizeof(FARPROC16
);
2073 *(FARPROC
*)thunk
= GetProcAddress(kernel32_handle
,"QT_Thunk");
2074 thunk
+= sizeof(FARPROC16
);
2075 *(WORD
*)thunk
= wine_get_cs();
2077 return MAKESEGPTR( code_sel32
, (char *)thunk
- (char *)ThunkletHeap
);
2081 /***********************************************************************
2082 * GetWin16DOSEnv (KERNEL32.34)
2083 * Returns some internal value.... probably the default environment database?
2085 DWORD WINAPI
GetWin16DOSEnv()
2087 FIXME("stub, returning 0\n");
2091 /**********************************************************************
2092 * GetPK16SysVar (KERNEL32.92)
2094 LPVOID WINAPI
GetPK16SysVar(void)
2096 static BYTE PK16SysVar
[128];
2102 /**********************************************************************
2103 * CommonUnimpStub (KERNEL32.17)
2105 void WINAPI
CommonUnimpStub( CONTEXT86
*context
)
2107 FIXME("generic stub: %s\n", ((LPSTR
)context
->Eax
? (LPSTR
)context
->Eax
: "?"));
2109 switch ((context
->Ecx
>> 4) & 0x0f)
2111 case 15: context
->Eax
= -1; break;
2112 case 14: context
->Eax
= 0x78; break;
2113 case 13: context
->Eax
= 0x32; break;
2114 case 1: context
->Eax
= 1; break;
2115 default: context
->Eax
= 0; break;
2118 context
->Esp
+= (context
->Ecx
& 0x0f) * 4;
2121 /**********************************************************************
2122 * HouseCleanLogicallyDeadHandles (KERNEL32.33)
2124 void WINAPI
HouseCleanLogicallyDeadHandles(void)
2126 /* Whatever this is supposed to do, our handles probably
2127 don't need it :-) */
2130 /**********************************************************************
2133 BOOL WINAPI
_KERNEL32_100(HANDLE threadid
,DWORD exitcode
,DWORD x
)
2135 FIXME("(%p,%ld,0x%08lx): stub\n",threadid
,exitcode
,x
);
2139 /**********************************************************************
2142 * Checks whether the clock has to be switched from daylight
2143 * savings time to standard time or vice versa.
2146 DWORD WINAPI
_KERNEL32_99(DWORD x
)
2148 FIXME("(0x%08lx): stub\n",x
);
2153 /**********************************************************************
2156 * Real prototype is:
2157 * INT16 WINAPI Catch( LPCATCHBUF lpbuf );
2159 void WINAPI
Catch16( LPCATCHBUF lpbuf
, CONTEXT86
*context
)
2161 /* Note: we don't save the current ss, as the catch buffer is */
2162 /* only 9 words long. Hopefully no one will have the silly */
2163 /* idea to change the current stack before calling Throw()... */
2177 lpbuf
[0] = LOWORD(context
->Eip
);
2178 lpbuf
[1] = context
->SegCs
;
2179 /* Windows pushes 4 more words before saving sp */
2180 lpbuf
[2] = LOWORD(context
->Esp
) - 4 * sizeof(WORD
);
2181 lpbuf
[3] = LOWORD(context
->Ebp
);
2182 lpbuf
[4] = LOWORD(context
->Esi
);
2183 lpbuf
[5] = LOWORD(context
->Edi
);
2184 lpbuf
[6] = context
->SegDs
;
2186 lpbuf
[8] = context
->SegSs
;
2187 context
->Eax
&= ~0xffff; /* Return 0 */
2191 /**********************************************************************
2194 * Real prototype is:
2195 * INT16 WINAPI Throw( LPCATCHBUF lpbuf, INT16 retval );
2197 void WINAPI
Throw16( LPCATCHBUF lpbuf
, INT16 retval
, CONTEXT86
*context
)
2199 STACK16FRAME
*pFrame
;
2200 STACK32FRAME
*frame32
;
2202 context
->Eax
= (context
->Eax
& ~0xffff) | (WORD
)retval
;
2204 /* Find the frame32 corresponding to the frame16 we are jumping to */
2205 pFrame
= CURRENT_STACK16
;
2206 frame32
= pFrame
->frame32
;
2207 while (frame32
&& frame32
->frame16
)
2209 if (OFFSETOF(frame32
->frame16
) < OFFSETOF(NtCurrentTeb()->cur_stack
))
2210 break; /* Something strange is going on */
2211 if (OFFSETOF(frame32
->frame16
) > lpbuf
[2])
2213 /* We found the right frame */
2214 pFrame
->frame32
= frame32
;
2217 frame32
= ((STACK16FRAME
*)MapSL(frame32
->frame16
))->frame32
;
2219 RtlUnwind( &pFrame
->frame32
->frame
, NULL
, NULL
, 0 );
2221 context
->Eip
= lpbuf
[0];
2222 context
->SegCs
= lpbuf
[1];
2223 context
->Esp
= lpbuf
[2] + 4 * sizeof(WORD
) - sizeof(WORD
) /*extra arg*/;
2224 context
->Ebp
= lpbuf
[3];
2225 context
->Esi
= lpbuf
[4];
2226 context
->Edi
= lpbuf
[5];
2227 context
->SegDs
= lpbuf
[6];
2229 if (lpbuf
[8] != context
->SegSs
)
2230 ERR("Switching stack segment with Throw() not supported; expect crash now\n" );