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
24 #include <sys/types.h>
30 #include "wine/winbase16.h"
32 #include "wine/debug.h"
33 #include "wine/library.h"
34 #include "flatthunk.h"
37 #include "selectors.h"
38 #include "stackframe.h"
41 WINE_DEFAULT_DEBUG_CHANNEL(thunk
);
44 extern void __wine_call_from_16_thunk();
46 static void __wine_call_from_16_thunk() { }
49 /***********************************************************************
51 * Win95 internal thunks *
53 ***********************************************************************/
55 /***********************************************************************
56 * LogApiThk (KERNEL.423)
58 void WINAPI
LogApiThk( LPSTR func
)
60 TRACE( "%s\n", debugstr_a(func
) );
63 /***********************************************************************
64 * LogApiThkLSF (KERNEL32.42)
66 * NOTE: needs to preserve all registers!
68 void WINAPI
LogApiThkLSF( LPSTR func
, CONTEXT86
*context
)
70 TRACE( "%s\n", debugstr_a(func
) );
73 /***********************************************************************
74 * LogApiThkSL (KERNEL32.44)
76 * NOTE: needs to preserve all registers!
78 void WINAPI
LogApiThkSL( LPSTR func
, CONTEXT86
*context
)
80 TRACE( "%s\n", debugstr_a(func
) );
83 /***********************************************************************
84 * LogCBThkSL (KERNEL32.47)
86 * NOTE: needs to preserve all registers!
88 void WINAPI
LogCBThkSL( LPSTR func
, CONTEXT86
*context
)
90 TRACE( "%s\n", debugstr_a(func
) );
93 /***********************************************************************
94 * Generates a FT_Prolog call.
96 * 0FB6D1 movzbl edx,cl
97 * 8B1495xxxxxxxx mov edx,[4*edx + targetTable]
98 * 68xxxxxxxx push FT_Prolog
101 static void _write_ftprolog(LPBYTE relayCode
,DWORD
*targetTable
) {
105 *x
++ = 0x0f;*x
++=0xb6;*x
++=0xd1; /* movzbl edx,cl */
106 *x
++ = 0x8B;*x
++=0x14;*x
++=0x95;*(DWORD
**)x
= targetTable
;
107 x
+=4; /* mov edx, [4*edx + targetTable] */
108 *x
++ = 0x68; *(DWORD
*)x
= (DWORD
)GetProcAddress(GetModuleHandleA("KERNEL32"),"FT_Prolog");
109 x
+=4; /* push FT_Prolog */
110 *x
++ = 0xC3; /* lret */
111 /* fill rest with 0xCC / int 3 */
114 /***********************************************************************
115 * _write_qtthunk (internal)
116 * Generates a QT_Thunk style call.
119 * 8A4DFC mov cl , [ebp-04]
120 * 8B148Dxxxxxxxx mov edx, [4*ecx + targetTable]
121 * B8yyyyyyyy mov eax, QT_Thunk
124 static void _write_qtthunk(
125 LPBYTE relayCode
, /* [in] start of QT_Thunk stub */
126 DWORD
*targetTable
/* [in] start of thunk (for index lookup) */
131 *x
++ = 0x33;*x
++=0xC9; /* xor ecx,ecx */
132 *x
++ = 0x8A;*x
++=0x4D;*x
++=0xFC; /* movb cl,[ebp-04] */
133 *x
++ = 0x8B;*x
++=0x14;*x
++=0x8D;*(DWORD
**)x
= targetTable
;
134 x
+=4; /* mov edx, [4*ecx + targetTable */
135 *x
++ = 0xB8; *(DWORD
*)x
= (DWORD
)GetProcAddress(GetModuleHandleA("KERNEL32"),"QT_Thunk");
136 x
+=4; /* mov eax , QT_Thunk */
137 *x
++ = 0xFF; *x
++ = 0xE0; /* jmp eax */
138 /* should fill the rest of the 32 bytes with 0xCC */
141 /***********************************************************************
144 static LPVOID
_loadthunk(LPCSTR module
, LPCSTR func
, LPCSTR module32
,
145 struct ThunkDataCommon
*TD32
, DWORD checksum
)
147 struct ThunkDataCommon
*TD16
;
151 if ((hmod
= LoadLibrary16(module
)) <= 32)
153 ERR("(%s, %s, %s): Unable to load '%s', error %d\n",
154 module
, func
, module32
, module
, hmod
);
158 if ( !(ordinal
= NE_GetOrdinal(hmod
, func
))
159 || !(TD16
= MapSL((SEGPTR
)NE_GetEntryPointEx(hmod
, ordinal
, FALSE
))))
161 ERR("Unable to find thunk data '%s' in %s, required by %s (conflicting/incorrect DLL versions !?).\n",
162 func
, module
, module32
);
166 if (TD32
&& memcmp(TD16
->magic
, TD32
->magic
, 4))
168 ERR("(%s, %s, %s): Bad magic %c%c%c%c (should be %c%c%c%c)\n",
169 module
, func
, module32
,
170 TD16
->magic
[0], TD16
->magic
[1], TD16
->magic
[2], TD16
->magic
[3],
171 TD32
->magic
[0], TD32
->magic
[1], TD32
->magic
[2], TD32
->magic
[3]);
175 if (TD32
&& TD16
->checksum
!= TD32
->checksum
)
177 ERR("(%s, %s, %s): Wrong checksum %08lx (should be %08lx)\n",
178 module
, func
, module32
, TD16
->checksum
, TD32
->checksum
);
182 if (!TD32
&& checksum
&& checksum
!= *(LPDWORD
)TD16
)
184 ERR("(%s, %s, %s): Wrong checksum %08lx (should be %08lx)\n",
185 module
, func
, module32
, *(LPDWORD
)TD16
, checksum
);
192 /***********************************************************************
193 * GetThunkStuff (KERNEL32.53)
195 LPVOID WINAPI
GetThunkStuff(LPSTR module
, LPSTR func
)
197 return _loadthunk(module
, func
, "<kernel>", NULL
, 0L);
200 /***********************************************************************
201 * GetThunkBuff (KERNEL32.52)
202 * Returns a pointer to ThkBuf in the 16bit library SYSTHUNK.DLL.
204 LPVOID WINAPI
GetThunkBuff(void)
206 return GetThunkStuff("SYSTHUNK.DLL", "ThkBuf");
209 /***********************************************************************
210 * ThunkConnect32 (KERNEL32.@)
211 * Connects a 32bit and a 16bit thunkbuffer.
213 UINT WINAPI
ThunkConnect32(
214 struct ThunkDataCommon
*TD
, /* [in/out] thunkbuffer */
215 LPSTR thunkfun16
, /* [in] win16 thunkfunction */
216 LPSTR module16
, /* [in] name of win16 dll */
217 LPSTR module32
, /* [in] name of win32 dll */
218 HMODULE hmod32
, /* [in] hmodule of win32 dll */
219 DWORD dwReason
/* [in] initialisation argument */
223 if (!strncmp(TD
->magic
, "SL01", 4))
227 TRACE("SL01 thunk %s (%lx) <- %s (%s), Reason: %ld\n",
228 module32
, (DWORD
)TD
, module16
, thunkfun16
, dwReason
);
230 else if (!strncmp(TD
->magic
, "LS01", 4))
234 TRACE("LS01 thunk %s (%lx) -> %s (%s), Reason: %ld\n",
235 module32
, (DWORD
)TD
, module16
, thunkfun16
, dwReason
);
239 ERR("Invalid magic %c%c%c%c\n",
240 TD
->magic
[0], TD
->magic
[1], TD
->magic
[2], TD
->magic
[3]);
246 case DLL_PROCESS_ATTACH
:
248 struct ThunkDataCommon
*TD16
;
249 if (!(TD16
= _loadthunk(module16
, thunkfun16
, module32
, TD
, 0L)))
254 struct ThunkDataSL32
*SL32
= (struct ThunkDataSL32
*)TD
;
255 struct ThunkDataSL16
*SL16
= (struct ThunkDataSL16
*)TD16
;
256 struct SLTargetDB
*tdb
;
258 if (SL16
->fpData
== NULL
)
260 ERR("ThunkConnect16 was not called!\n");
264 SL32
->data
= SL16
->fpData
;
266 tdb
= HeapAlloc(GetProcessHeap(), 0, sizeof(*tdb
));
267 tdb
->process
= GetCurrentProcessId();
268 tdb
->targetTable
= (DWORD
*)(thunkfun16
+ SL32
->offsetTargetTable
);
270 tdb
->next
= SL32
->data
->targetDB
; /* FIXME: not thread-safe! */
271 SL32
->data
->targetDB
= tdb
;
273 TRACE("Process %08lx allocated TargetDB entry for ThunkDataSL %08lx\n",
274 GetCurrentProcessId(), (DWORD
)SL32
->data
);
278 struct ThunkDataLS32
*LS32
= (struct ThunkDataLS32
*)TD
;
279 struct ThunkDataLS16
*LS16
= (struct ThunkDataLS16
*)TD16
;
281 LS32
->targetTable
= MapSL(LS16
->targetTable
);
283 /* write QT_Thunk and FT_Prolog stubs */
284 _write_qtthunk ((LPBYTE
)TD
+ LS32
->offsetQTThunk
, LS32
->targetTable
);
285 _write_ftprolog((LPBYTE
)TD
+ LS32
->offsetFTProlog
, LS32
->targetTable
);
290 case DLL_PROCESS_DETACH
:
298 /**********************************************************************
299 * QT_Thunk (KERNEL32.@)
301 * The target address is in EDX.
302 * The 16bit arguments start at ESP.
303 * The number of 16bit argument bytes is EBP-ESP-0x40 (64 Byte thunksetup).
304 * So the stack layout is 16bit argument bytes and then the 64 byte
306 * The scratch buffer is used as work space by Windows' QT_Thunk
308 * As the programs unfortunately don't always provide a fixed size
309 * scratch buffer (danger, stack corruption ahead !!), we simply resort
310 * to copying over the whole EBP-ESP range to the 16bit stack
311 * (as there's no way to safely figure out the param count
312 * due to this misbehaviour of some programs).
315 * See DDJ article 9614c for a very good description of QT_Thunk (also
316 * available online !).
318 * FIXME: DDJ talks of certain register usage rules; I'm not sure
319 * whether we cover this 100%.
321 void WINAPI
QT_Thunk( CONTEXT86
*context
)
326 memcpy(&context16
,context
,sizeof(context16
));
328 context16
.SegCs
= HIWORD(context
->Edx
);
329 context16
.Eip
= LOWORD(context
->Edx
);
330 /* point EBP to the STACK16FRAME on the stack
331 * for the call_to_16 to set up the register content on calling */
332 context16
.Ebp
= OFFSETOF( NtCurrentTeb()->cur_stack
)
333 + (WORD
)&((STACK16FRAME
*)0)->bp
;
336 * used to be (problematic):
337 * argsize = context->Ebp - context->Esp - 0x40;
338 * due to some programs abusing the API, we better assume the full
339 * EBP - ESP range for copying instead: */
340 argsize
= context
->Ebp
- context
->Esp
;
342 /* ok, too much is insane; let's limit param count a bit again */
344 argsize
= 64; /* 32 WORDs */
346 memcpy( (LPBYTE
)CURRENT_STACK16
- argsize
,
347 (LPBYTE
)context
->Esp
, argsize
);
349 /* let's hope call_to_16 won't mind getting called with such a
350 * potentially bogus large number of arguments */
351 wine_call_to_16_regs_short( &context16
, argsize
);
352 context
->Eax
= context16
.Eax
;
353 context
->Edx
= context16
.Edx
;
354 context
->Ecx
= context16
.Ecx
;
356 /* make sure to update the Win32 ESP, too, in order to throw away
357 * the number of parameters that the Win16 function
358 * accepted (that it popped from the corresponding Win16 stack) */
359 context
->Esp
+= LOWORD(context16
.Esp
) -
360 ( OFFSETOF( NtCurrentTeb()->cur_stack
) - argsize
);
364 /**********************************************************************
365 * FT_Prolog (KERNEL32.@)
367 * The set of FT_... thunk routines is used instead of QT_Thunk,
368 * if structures have to be converted from 32-bit to 16-bit
369 * (change of member alignment, conversion of members).
371 * The thunk function (as created by the thunk compiler) calls
372 * FT_Prolog at the beginning, to set up a stack frame and
373 * allocate a 64 byte buffer on the stack.
374 * The input parameters (target address and some flags) are
375 * saved for later use by FT_Thunk.
377 * Input: EDX 16-bit target address (SEGPTR)
378 * CX bits 0..7 target number (in target table)
379 * bits 8..9 some flags (unclear???)
380 * bits 10..15 number of DWORD arguments
382 * Output: A new stackframe is created, and a 64 byte buffer
383 * allocated on the stack. The layout of the stack
384 * on return is as follows:
386 * (ebp+4) return address to caller of thunk function
388 * (ebp-4) saved EBX register of caller
389 * (ebp-8) saved ESI register of caller
390 * (ebp-12) saved EDI register of caller
391 * (ebp-16) saved ECX register, containing flags
392 * (ebp-20) bitmap containing parameters that are to be converted
393 * by FT_Thunk; it is initialized to 0 by FT_Prolog and
394 * filled in by the thunk code before calling FT_Thunk
398 * (ebp-48) saved EAX register of caller (unclear, never restored???)
399 * (ebp-52) saved EDX register, containing 16-bit thunk target
404 * ESP is EBP-64 after return.
408 void WINAPI
FT_Prolog( CONTEXT86
*context
)
410 /* Build stack frame */
411 stack32_push(context
, context
->Ebp
);
412 context
->Ebp
= context
->Esp
;
414 /* Allocate 64-byte Thunk Buffer */
416 memset((char *)context
->Esp
, '\0', 64);
418 /* Store Flags (ECX) and Target Address (EDX) */
419 /* Save other registers to be restored later */
420 *(DWORD
*)(context
->Ebp
- 4) = context
->Ebx
;
421 *(DWORD
*)(context
->Ebp
- 8) = context
->Esi
;
422 *(DWORD
*)(context
->Ebp
- 12) = context
->Edi
;
423 *(DWORD
*)(context
->Ebp
- 16) = context
->Ecx
;
425 *(DWORD
*)(context
->Ebp
- 48) = context
->Eax
;
426 *(DWORD
*)(context
->Ebp
- 52) = context
->Edx
;
429 /**********************************************************************
430 * FT_Thunk (KERNEL32.@)
432 * This routine performs the actual call to 16-bit code,
433 * similar to QT_Thunk. The differences are:
434 * - The call target is taken from the buffer created by FT_Prolog
435 * - Those arguments requested by the thunk code (by setting the
436 * corresponding bit in the bitmap at EBP-20) are converted
437 * from 32-bit pointers to segmented pointers (those pointers
438 * are guaranteed to point to structures copied to the stack
439 * by the thunk code, so we always use the 16-bit stack selector
440 * for those addresses).
442 * The bit #i of EBP-20 corresponds here to the DWORD starting at
445 * FIXME: It is unclear what happens if there are more than 32 WORDs
446 * of arguments, so that the single DWORD bitmap is no longer
450 void WINAPI
FT_Thunk( CONTEXT86
*context
)
452 DWORD mapESPrelative
= *(DWORD
*)(context
->Ebp
- 20);
453 DWORD callTarget
= *(DWORD
*)(context
->Ebp
- 52);
457 LPBYTE newstack
, oldstack
;
459 memcpy(&context16
,context
,sizeof(context16
));
461 context16
.SegCs
= HIWORD(callTarget
);
462 context16
.Eip
= LOWORD(callTarget
);
463 context16
.Ebp
= OFFSETOF( NtCurrentTeb()->cur_stack
)
464 + (WORD
)&((STACK16FRAME
*)0)->bp
;
466 argsize
= context
->Ebp
-context
->Esp
-0x40;
467 newstack
= (LPBYTE
)CURRENT_STACK16
- argsize
;
468 oldstack
= (LPBYTE
)context
->Esp
;
470 memcpy( newstack
, oldstack
, argsize
);
472 for (i
= 0; i
< 32; i
++) /* NOTE: What about > 32 arguments? */
473 if (mapESPrelative
& (1 << i
))
475 SEGPTR
*arg
= (SEGPTR
*)(newstack
+ 2*i
);
476 *arg
= MAKESEGPTR(SELECTOROF(NtCurrentTeb()->cur_stack
),
477 OFFSETOF(NtCurrentTeb()->cur_stack
) - argsize
478 + (*(LPBYTE
*)arg
- oldstack
));
481 wine_call_to_16_regs_short( &context16
, argsize
);
482 context
->Eax
= context16
.Eax
;
483 context
->Edx
= context16
.Edx
;
484 context
->Ecx
= context16
.Ecx
;
486 context
->Esp
+= LOWORD(context16
.Esp
) -
487 ( OFFSETOF( NtCurrentTeb()->cur_stack
) - argsize
);
489 /* Copy modified buffers back to 32-bit stack */
490 memcpy( oldstack
, newstack
, argsize
);
493 /**********************************************************************
494 * FT_ExitNN (KERNEL32.218 - 232)
496 * One of the FT_ExitNN functions is called at the end of the thunk code.
497 * It removes the stack frame created by FT_Prolog, moves the function
498 * return from EBX to EAX (yes, FT_Thunk did use EAX for the return
499 * value, but the thunk code has moved it from EAX to EBX in the
500 * meantime ... :-), restores the caller's EBX, ESI, and EDI registers,
501 * and perform a return to the CALLER of the thunk code (while removing
502 * the given number of arguments from the caller's stack).
505 static void FT_Exit(CONTEXT86
*context
, int nPopArgs
)
507 /* Return value is in EBX */
508 context
->Eax
= context
->Ebx
;
510 /* Restore EBX, ESI, and EDI registers */
511 context
->Ebx
= *(DWORD
*)(context
->Ebp
- 4);
512 context
->Esi
= *(DWORD
*)(context
->Ebp
- 8);
513 context
->Edi
= *(DWORD
*)(context
->Ebp
- 12);
515 /* Clean up stack frame */
516 context
->Esp
= context
->Ebp
;
517 context
->Ebp
= stack32_pop(context
);
519 /* Pop return address to CALLER of thunk code */
520 context
->Eip
= stack32_pop(context
);
521 /* Remove arguments */
522 context
->Esp
+= nPopArgs
;
525 /***********************************************************************
526 * FT_Exit0 (KERNEL32.@)
528 void WINAPI
FT_Exit0 (CONTEXT86
*context
) { FT_Exit(context
, 0); }
530 /***********************************************************************
531 * FT_Exit4 (KERNEL32.@)
533 void WINAPI
FT_Exit4 (CONTEXT86
*context
) { FT_Exit(context
, 4); }
535 /***********************************************************************
536 * FT_Exit8 (KERNEL32.@)
538 void WINAPI
FT_Exit8 (CONTEXT86
*context
) { FT_Exit(context
, 8); }
540 /***********************************************************************
541 * FT_Exit12 (KERNEL32.@)
543 void WINAPI
FT_Exit12(CONTEXT86
*context
) { FT_Exit(context
, 12); }
545 /***********************************************************************
546 * FT_Exit16 (KERNEL32.@)
548 void WINAPI
FT_Exit16(CONTEXT86
*context
) { FT_Exit(context
, 16); }
550 /***********************************************************************
551 * FT_Exit20 (KERNEL32.@)
553 void WINAPI
FT_Exit20(CONTEXT86
*context
) { FT_Exit(context
, 20); }
555 /***********************************************************************
556 * FT_Exit24 (KERNEL32.@)
558 void WINAPI
FT_Exit24(CONTEXT86
*context
) { FT_Exit(context
, 24); }
560 /***********************************************************************
561 * FT_Exit28 (KERNEL32.@)
563 void WINAPI
FT_Exit28(CONTEXT86
*context
) { FT_Exit(context
, 28); }
565 /***********************************************************************
566 * FT_Exit32 (KERNEL32.@)
568 void WINAPI
FT_Exit32(CONTEXT86
*context
) { FT_Exit(context
, 32); }
570 /***********************************************************************
571 * FT_Exit36 (KERNEL32.@)
573 void WINAPI
FT_Exit36(CONTEXT86
*context
) { FT_Exit(context
, 36); }
575 /***********************************************************************
576 * FT_Exit40 (KERNEL32.@)
578 void WINAPI
FT_Exit40(CONTEXT86
*context
) { FT_Exit(context
, 40); }
580 /***********************************************************************
581 * FT_Exit44 (KERNEL32.@)
583 void WINAPI
FT_Exit44(CONTEXT86
*context
) { FT_Exit(context
, 44); }
585 /***********************************************************************
586 * FT_Exit48 (KERNEL32.@)
588 void WINAPI
FT_Exit48(CONTEXT86
*context
) { FT_Exit(context
, 48); }
590 /***********************************************************************
591 * FT_Exit52 (KERNEL32.@)
593 void WINAPI
FT_Exit52(CONTEXT86
*context
) { FT_Exit(context
, 52); }
595 /***********************************************************************
596 * FT_Exit56 (KERNEL32.@)
598 void WINAPI
FT_Exit56(CONTEXT86
*context
) { FT_Exit(context
, 56); }
600 /***********************************************************************
601 * ThunkInitLS (KERNEL32.43)
602 * A thunkbuffer link routine
603 * The thunkbuf looks like:
605 * 00: DWORD length ? don't know exactly
606 * 04: SEGPTR ptr ? where does it point to?
607 * The pointer ptr is written into the first DWORD of 'thunk'.
608 * (probably correctly implemented)
611 * segmented pointer to thunk?
613 DWORD WINAPI
ThunkInitLS(
614 LPDWORD thunk
, /* [in] win32 thunk */
615 LPCSTR thkbuf
, /* [in] thkbuffer name in win16 dll */
616 DWORD len
, /* [in] thkbuffer length */
617 LPCSTR dll16
, /* [in] name of win16 dll */
618 LPCSTR dll32
/* [in] name of win32 dll (FIXME: not used?) */
622 if (!(addr
= _loadthunk( dll16
, thkbuf
, dll32
, NULL
, len
)))
627 *(DWORD
*)thunk
= addr
[1];
632 /***********************************************************************
633 * Common32ThkLS (KERNEL32.45)
635 * This is another 32->16 thunk, independent of the QT_Thunk/FT_Thunk
636 * style thunks. The basic difference is that the parameter conversion
637 * is done completely on the *16-bit* side here. Thus we do not call
638 * the 16-bit target directly, but call a common entry point instead.
639 * This entry function then calls the target according to the target
640 * number passed in the DI register.
642 * Input: EAX SEGPTR to the common 16-bit entry point
643 * CX offset in thunk table (target number * 4)
644 * DX error return value if execution fails (unclear???)
645 * EDX.HI number of DWORD parameters
647 * (Note that we need to move the thunk table offset from CX to DI !)
649 * The called 16-bit stub expects its stack to look like this:
651 * (esp+40) 32-bit arguments
653 * (esp+8) 32 byte of stack space available as buffer
654 * (esp) 8 byte return address for use with 0x66 lret
656 * The called 16-bit stub uses a 0x66 lret to return to 32-bit code,
657 * and uses the EAX register to return a DWORD return value.
658 * Thus we need to use a special assembly glue routine
659 * (CallRegisterLongProc instead of CallRegisterShortProc).
661 * Finally, we return to the caller, popping the arguments off
662 * the stack. The number of arguments to be popped is returned
663 * in the BL register by the called 16-bit routine.
666 void WINAPI
Common32ThkLS( CONTEXT86
*context
)
671 memcpy(&context16
,context
,sizeof(context16
));
673 context16
.Edi
= LOWORD(context
->Ecx
);
674 context16
.SegCs
= HIWORD(context
->Eax
);
675 context16
.Eip
= LOWORD(context
->Eax
);
676 context16
.Ebp
= OFFSETOF( NtCurrentTeb()->cur_stack
)
677 + (WORD
)&((STACK16FRAME
*)0)->bp
;
679 argsize
= HIWORD(context
->Edx
) * 4;
681 /* FIXME: hack for stupid USER32 CallbackGlueLS routine */
682 if (context
->Edx
== context
->Eip
)
685 memcpy( (LPBYTE
)CURRENT_STACK16
- argsize
,
686 (LPBYTE
)context
->Esp
, argsize
);
688 wine_call_to_16_regs_long(&context16
, argsize
+ 32);
689 context
->Eax
= context16
.Eax
;
691 /* Clean up caller's stack frame */
692 context
->Esp
+= BL_reg(&context16
);
695 /***********************************************************************
696 * OT_32ThkLSF (KERNEL32.40)
698 * YET Another 32->16 thunk. The difference to Common32ThkLS is that
699 * argument processing is done on both the 32-bit and the 16-bit side:
700 * The 32-bit side prepares arguments, copying them onto the stack.
702 * When this routine is called, the first word on the stack is the
703 * number of argument bytes prepared by the 32-bit code, and EDX
704 * contains the 16-bit target address.
706 * The called 16-bit routine is another relaycode, doing further
707 * argument processing and then calling the real 16-bit target
708 * whose address is stored at [bp-04].
710 * The call proceeds using a normal CallRegisterShortProc.
711 * After return from the 16-bit relaycode, the arguments need
712 * to be copied *back* to the 32-bit stack, since the 32-bit
713 * relaycode processes output parameters.
715 * Note that we copy twice the number of arguments, since some of the
716 * 16-bit relaycodes in SYSTHUNK.DLL directly access the original
717 * arguments of the caller!
719 * (Note that this function seems only to be used for
720 * OLECLI32 -> OLECLI and OLESVR32 -> OLESVR thunking.)
722 void WINAPI
OT_32ThkLSF( CONTEXT86
*context
)
727 memcpy(&context16
,context
,sizeof(context16
));
729 context16
.SegCs
= HIWORD(context
->Edx
);
730 context16
.Eip
= LOWORD(context
->Edx
);
731 context16
.Ebp
= OFFSETOF( NtCurrentTeb()->cur_stack
)
732 + (WORD
)&((STACK16FRAME
*)0)->bp
;
734 argsize
= 2 * *(WORD
*)context
->Esp
+ 2;
736 memcpy( (LPBYTE
)CURRENT_STACK16
- argsize
,
737 (LPBYTE
)context
->Esp
, argsize
);
739 wine_call_to_16_regs_short(&context16
, argsize
);
740 context
->Eax
= context16
.Eax
;
741 context
->Edx
= context16
.Edx
;
743 /* Copy modified buffers back to 32-bit stack */
744 memcpy( (LPBYTE
)context
->Esp
,
745 (LPBYTE
)CURRENT_STACK16
- argsize
, argsize
);
747 context
->Esp
+= LOWORD(context16
.Esp
) -
748 ( OFFSETOF( NtCurrentTeb()->cur_stack
) - argsize
);
751 /***********************************************************************
752 * ThunkInitLSF (KERNEL32.41)
753 * A thunk setup routine.
754 * Expects a pointer to a preinitialized thunkbuffer in the first argument
756 * 00..03: unknown (pointer, check _41, _43, _46)
759 * 06..23: unknown (space for replacement code, check .90)
761 * 24:>E800000000 call offset 29
762 * 29:>58 pop eax ( target of call )
763 * 2A: 2D25000000 sub eax,0x00000025 ( now points to offset 4 )
764 * 2F: BAxxxxxxxx mov edx,xxxxxxxx
765 * 34: 68yyyyyyyy push KERNEL32.90
769 * 3E ... 59: unknown (space for replacement code?)
770 * 5A: E8xxxxxxxx call <32bitoffset xxxxxxxx>
772 * 60: 81EA25xxxxxx sub edx, 0x25xxxxxx
774 * 67: 68xxxxxxxx push xxxxxxxx
775 * 6C: 68yyyyyyyy push KERNEL32.89
778 * This function checks if the code is there, and replaces the yyyyyyyy entries
779 * by the functionpointers.
780 * The thunkbuf looks like:
782 * 00: DWORD length ? don't know exactly
783 * 04: SEGPTR ptr ? where does it point to?
784 * The segpointer ptr is written into the first DWORD of 'thunk'.
787 * unclear, pointer to win16 thkbuffer?
789 LPVOID WINAPI
ThunkInitLSF(
790 LPBYTE thunk
, /* [in] win32 thunk */
791 LPCSTR thkbuf
, /* [in] thkbuffer name in win16 dll */
792 DWORD len
, /* [in] length of thkbuffer */
793 LPCSTR dll16
, /* [in] name of win16 dll */
794 LPCSTR dll32
/* [in] name of win32 dll */
796 HMODULE hkrnl32
= GetModuleHandleA("KERNEL32");
799 /* FIXME: add checks for valid code ... */
800 /* write pointers to kernel32.89 and kernel32.90 (+ordinal base of 1) */
801 *(DWORD
*)(thunk
+0x35) = (DWORD
)GetProcAddress(hkrnl32
,(LPSTR
)90);
802 *(DWORD
*)(thunk
+0x6D) = (DWORD
)GetProcAddress(hkrnl32
,(LPSTR
)89);
805 if (!(addr
= _loadthunk( dll16
, thkbuf
, dll32
, NULL
, len
)))
808 addr2
= MapSL(addr
[1]);
810 *(DWORD
*)thunk
= (DWORD
)addr2
;
815 /***********************************************************************
816 * FT_PrologPrime (KERNEL32.89)
818 * This function is called from the relay code installed by
819 * ThunkInitLSF. It replaces the location from where it was
820 * called by a standard FT_Prolog call stub (which is 'primed'
821 * by inserting the correct target table pointer).
822 * Finally, it calls that stub.
824 * Input: ECX target number + flags (passed through to FT_Prolog)
825 * (ESP) offset of location where target table pointer
826 * is stored, relative to the start of the relay code
827 * (ESP+4) pointer to start of relay code
828 * (this is where the FT_Prolog call stub gets written to)
830 * Note: The two DWORD arguments get popped off the stack.
833 void WINAPI
FT_PrologPrime( CONTEXT86
*context
)
835 DWORD targetTableOffset
;
838 /* Compensate for the fact that the Wine register relay code thought
839 we were being called, although we were in fact jumped to */
842 /* Write FT_Prolog call stub */
843 targetTableOffset
= stack32_pop(context
);
844 relayCode
= (LPBYTE
)stack32_pop(context
);
845 _write_ftprolog( relayCode
, *(DWORD
**)(relayCode
+targetTableOffset
) );
847 /* Jump to the call stub just created */
848 context
->Eip
= (DWORD
)relayCode
;
851 /***********************************************************************
852 * QT_ThunkPrime (KERNEL32.90)
854 * This function corresponds to FT_PrologPrime, but installs a
855 * call stub for QT_Thunk instead.
857 * Input: (EBP-4) target number (passed through to QT_Thunk)
858 * EDX target table pointer location offset
859 * EAX start of relay code
862 void WINAPI
QT_ThunkPrime( CONTEXT86
*context
)
864 DWORD targetTableOffset
;
867 /* Compensate for the fact that the Wine register relay code thought
868 we were being called, although we were in fact jumped to */
871 /* Write QT_Thunk call stub */
872 targetTableOffset
= context
->Edx
;
873 relayCode
= (LPBYTE
)context
->Eax
;
874 _write_qtthunk( relayCode
, *(DWORD
**)(relayCode
+targetTableOffset
) );
876 /* Jump to the call stub just created */
877 context
->Eip
= (DWORD
)relayCode
;
880 /***********************************************************************
881 * ThunkInitSL (KERNEL32.46)
882 * Another thunkbuf link routine.
883 * The start of the thunkbuf looks like this:
885 * 04: SEGPTR address for thunkbuffer pointer
888 VOID WINAPI
ThunkInitSL(
889 LPBYTE thunk
, /* [in] start of thunkbuffer */
890 LPCSTR thkbuf
, /* [in] name/ordinal of thunkbuffer in win16 dll */
891 DWORD len
, /* [in] length of thunkbuffer */
892 LPCSTR dll16
, /* [in] name of win16 dll containing the thkbuf */
893 LPCSTR dll32
/* [in] win32 dll. FIXME: strange, unused */
897 if (!(addr
= _loadthunk( dll16
, thkbuf
, dll32
, NULL
, len
)))
900 *(DWORD
*)MapSL(addr
[1]) = (DWORD
)thunk
;
903 /**********************************************************************
904 * SSInit (KERNEL.700)
908 BOOL WINAPI
SSInit16()
913 /**********************************************************************
914 * SSOnBigStack (KERNEL32.87)
915 * Check if thunking is initialized (ss selector set up etc.)
916 * We do that differently, so just return TRUE.
921 BOOL WINAPI
SSOnBigStack()
923 TRACE("Yes, thunking is initialized\n");
927 /**********************************************************************
928 * SSConfirmSmallStack (KERNEL.704)
930 * Abort if not on small stack.
932 * This must be a register routine as it has to preserve *all* registers.
934 void WINAPI
SSConfirmSmallStack( CONTEXT86
*context
)
936 /* We are always on the small stack while in 16-bit code ... */
939 /**********************************************************************
940 * SSCall (KERNEL32.88)
941 * One of the real thunking functions. This one seems to be for 32<->32
942 * thunks. It should probably be capable of crossing processboundaries.
944 * And YES, I've seen nr=48 (somewhere in the Win95 32<->16 OLE coupling)
947 DWORD WINAPIV
SSCall(
948 DWORD nr
, /* [in] number of argument bytes */
949 DWORD flags
, /* [in] FIXME: flags ? */
950 FARPROC fun
, /* [in] function to call */
951 ... /* [in/out] arguments */
954 DWORD
*args
= ((DWORD
*)&fun
) + 1;
958 DPRINTF("(%ld,0x%08lx,%p,[",nr
,flags
,fun
);
960 DPRINTF("0x%08lx,",args
[i
]);
966 case 4: ret
= fun(args
[0]);
968 case 8: ret
= fun(args
[0],args
[1]);
970 case 12: ret
= fun(args
[0],args
[1],args
[2]);
972 case 16: ret
= fun(args
[0],args
[1],args
[2],args
[3]);
974 case 20: ret
= fun(args
[0],args
[1],args
[2],args
[3],args
[4]);
976 case 24: ret
= fun(args
[0],args
[1],args
[2],args
[3],args
[4],args
[5]);
978 case 28: ret
= fun(args
[0],args
[1],args
[2],args
[3],args
[4],args
[5],args
[6]);
980 case 32: ret
= fun(args
[0],args
[1],args
[2],args
[3],args
[4],args
[5],args
[6],args
[7]);
982 case 36: ret
= fun(args
[0],args
[1],args
[2],args
[3],args
[4],args
[5],args
[6],args
[7],args
[8]);
984 case 40: ret
= fun(args
[0],args
[1],args
[2],args
[3],args
[4],args
[5],args
[6],args
[7],args
[8],args
[9]);
986 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]);
988 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]);
991 WARN("Unsupported nr of arguments, %ld\n",nr
);
996 TRACE(" returning %ld ...\n",ret
);
1000 /**********************************************************************
1001 * W32S_BackTo32 (KERNEL32.51)
1003 void WINAPI
W32S_BackTo32( CONTEXT86
*context
)
1005 LPDWORD stack
= (LPDWORD
)context
->Esp
;
1006 FARPROC proc
= (FARPROC
)context
->Eip
;
1008 context
->Eax
= proc( stack
[1], stack
[2], stack
[3], stack
[4], stack
[5],
1009 stack
[6], stack
[7], stack
[8], stack
[9], stack
[10] );
1011 context
->Eip
= stack32_pop(context
);
1014 /**********************************************************************
1015 * AllocSLCallback (KERNEL32.@)
1017 * Win95 uses some structchains for callbacks. It allocates them
1018 * in blocks of 100 entries, size 32 bytes each, layout:
1020 * 0: PTR nextblockstart
1022 * 8: WORD sel ( start points to blockstart)
1026 * 18: PDB *owning_process;
1027 * 1C: PTR blockstart
1029 * We ignore this for now. (Just a note for further developers)
1030 * FIXME: use this method, so we don't waste selectors...
1032 * Following code is then generated by AllocSLCallback. The code is 16 bit, so
1033 * the 0x66 prefix switches from word->long registers.
1036 * 6668x arg2 x pushl <arg2>
1038 * EAx arg1 x jmpf <arg1>
1040 * returns the startaddress of this thunk.
1042 * Note, that they look very similair to the ones allocates by THUNK_Alloc.
1044 * segmented pointer to the start of the thunk
1048 DWORD finalizer
, /* [in] finalizer function */
1049 DWORD callback
/* [in] callback function */
1051 LPBYTE x
,thunk
= HeapAlloc( GetProcessHeap(), 0, 32 );
1055 *x
++=0x66;*x
++=0x5a; /* popl edx */
1056 *x
++=0x66;*x
++=0x68;*(DWORD
*)x
=finalizer
;x
+=4; /* pushl finalizer */
1057 *x
++=0x66;*x
++=0x52; /* pushl edx */
1058 *x
++=0xea;*(DWORD
*)x
=callback
;x
+=4; /* jmpf callback */
1060 *(DWORD
*)(thunk
+18) = GetCurrentProcessId();
1062 sel
= SELECTOR_AllocBlock( thunk
, 32, WINE_LDT_FLAGS_CODE
);
1066 /**********************************************************************
1067 * FreeSLCallback (KERNEL32.@)
1068 * Frees the specified 16->32 callback
1072 DWORD x
/* [in] 16 bit callback (segmented pointer?) */
1074 FIXME("(0x%08lx): stub\n",x
);
1078 /**********************************************************************
1079 * GetTEBSelectorFS (KERNEL.475)
1080 * Set the 16-bit %fs to the 32-bit %fs (current TEB selector)
1082 void WINAPI
GetTEBSelectorFS16(void)
1084 CURRENT_STACK16
->fs
= wine_get_fs();
1087 /**********************************************************************
1088 * IsPeFormat (KERNEL.431)
1089 * Checks the passed filename if it is a PE format executeable
1094 BOOL16 WINAPI
IsPeFormat16(
1095 LPSTR fn
, /* [in] filename to executeable */
1096 HFILE16 hf16
/* [in] open file, if filename is NULL */
1099 IMAGE_DOS_HEADER mzh
;
1103 if (fn
) hf16
= OpenFile16(fn
,&ofs
,OF_READ
);
1104 if (hf16
== HFILE_ERROR16
) return FALSE
;
1105 _llseek16(hf16
,0,SEEK_SET
);
1106 if (sizeof(mzh
)!=_lread16(hf16
,&mzh
,sizeof(mzh
))) goto done
;
1107 if (mzh
.e_magic
!=IMAGE_DOS_SIGNATURE
) goto done
;
1108 _llseek16(hf16
,mzh
.e_lfanew
,SEEK_SET
);
1109 if (sizeof(DWORD
)!=_lread16(hf16
,&xmagic
,sizeof(DWORD
))) goto done
;
1110 ret
= (xmagic
== IMAGE_NT_SIGNATURE
);
1117 /***********************************************************************
1118 * K32Thk1632Prolog (KERNEL32.@)
1120 void WINAPI
K32Thk1632Prolog( CONTEXT86
*context
)
1122 LPBYTE code
= (LPBYTE
)context
->Eip
- 5;
1124 /* Arrrgh! SYSTHUNK.DLL just has to re-implement another method
1125 of 16->32 thunks instead of using one of the standard methods!
1126 This means that SYSTHUNK.DLL itself switches to a 32-bit stack,
1127 and does a far call to the 32-bit code segment of OLECLI32/OLESVR32.
1128 Unfortunately, our CallTo/CallFrom mechanism is therefore completely
1129 bypassed, which means it will crash the next time the 32-bit OLE
1130 code thunks down again to 16-bit (this *will* happen!).
1132 The following hack tries to recognize this situation.
1133 This is possible since the called stubs in OLECLI32/OLESVR32 all
1134 look exactly the same:
1135 00 E8xxxxxxxx call K32Thk1632Prolog
1136 05 FF55FC call [ebp-04]
1137 08 E8xxxxxxxx call K32Thk1632Epilog
1140 If we recognize this situation, we try to simulate the actions
1141 of our CallTo/CallFrom mechanism by copying the 16-bit stack
1142 to our 32-bit stack, creating a proper STACK16FRAME and
1143 updating cur_stack. */
1145 if ( code
[5] == 0xFF && code
[6] == 0x55 && code
[7] == 0xFC
1146 && code
[13] == 0x66 && code
[14] == 0xCB)
1148 WORD stackSel
= NtCurrentTeb()->stack_sel
;
1149 DWORD stackBase
= GetSelectorBase(stackSel
);
1151 DWORD argSize
= context
->Ebp
- context
->Esp
;
1152 char *stack16
= (char *)context
->Esp
- 4;
1153 char *stack32
= (char *)NtCurrentTeb()->cur_stack
- argSize
;
1154 STACK16FRAME
*frame16
= (STACK16FRAME
*)stack16
- 1;
1156 TRACE("before SYSTHUNK hack: EBP: %08lx ESP: %08lx cur_stack: %08lx\n",
1157 context
->Ebp
, context
->Esp
, NtCurrentTeb()->cur_stack
);
1159 memset(frame16
, '\0', sizeof(STACK16FRAME
));
1160 frame16
->frame32
= (STACK32FRAME
*)NtCurrentTeb()->cur_stack
;
1161 frame16
->ebp
= context
->Ebp
;
1163 memcpy(stack32
, stack16
, argSize
);
1164 NtCurrentTeb()->cur_stack
= MAKESEGPTR(stackSel
, (DWORD
)frame16
- stackBase
);
1166 context
->Esp
= (DWORD
)stack32
+ 4;
1167 context
->Ebp
= context
->Esp
+ argSize
;
1169 TRACE("after SYSTHUNK hack: EBP: %08lx ESP: %08lx cur_stack: %08lx\n",
1170 context
->Ebp
, context
->Esp
, NtCurrentTeb()->cur_stack
);
1173 /* entry_point is never used again once the entry point has
1174 been called. Thus we re-use it to hold the Win16Lock count */
1175 ReleaseThunkLock(&CURRENT_STACK16
->entry_point
);
1178 /***********************************************************************
1179 * K32Thk1632Epilog (KERNEL32.@)
1181 void WINAPI
K32Thk1632Epilog( CONTEXT86
*context
)
1183 LPBYTE code
= (LPBYTE
)context
->Eip
- 13;
1185 RestoreThunkLock(CURRENT_STACK16
->entry_point
);
1187 /* We undo the SYSTHUNK hack if necessary. See K32Thk1632Prolog. */
1189 if ( code
[5] == 0xFF && code
[6] == 0x55 && code
[7] == 0xFC
1190 && code
[13] == 0x66 && code
[14] == 0xCB)
1192 STACK16FRAME
*frame16
= MapSL(NtCurrentTeb()->cur_stack
);
1193 char *stack16
= (char *)(frame16
+ 1);
1194 DWORD argSize
= frame16
->ebp
- (DWORD
)stack16
;
1195 char *stack32
= (char *)frame16
->frame32
- argSize
;
1197 DWORD nArgsPopped
= context
->Esp
- (DWORD
)stack32
;
1199 TRACE("before SYSTHUNK hack: EBP: %08lx ESP: %08lx cur_stack: %08lx\n",
1200 context
->Ebp
, context
->Esp
, NtCurrentTeb()->cur_stack
);
1202 NtCurrentTeb()->cur_stack
= (DWORD
)frame16
->frame32
;
1204 context
->Esp
= (DWORD
)stack16
+ nArgsPopped
;
1205 context
->Ebp
= frame16
->ebp
;
1207 TRACE("after SYSTHUNK hack: EBP: %08lx ESP: %08lx cur_stack: %08lx\n",
1208 context
->Ebp
, context
->Esp
, NtCurrentTeb()->cur_stack
);
1212 /*********************************************************************
1213 * PK16FNF [KERNEL32.91]
1215 * This routine fills in the supplied 13-byte (8.3 plus terminator)
1216 * string buffer with the 8.3 filename of a recently loaded 16-bit
1217 * module. It is unknown exactly what modules trigger this
1218 * mechanism or what purpose this serves. Win98 Explorer (and
1219 * probably also Win95 with IE 4 shell integration) calls this
1220 * several times during initialization.
1222 * FIXME: find out what this really does and make it work.
1224 void WINAPI
PK16FNF(LPSTR strPtr
)
1226 FIXME("(%p): stub\n", strPtr
);
1228 /* fill in a fake filename that'll be easy to recognize */
1229 strcpy(strPtr
, "WINESTUB.FIX");
1232 /***********************************************************************
1233 * 16->32 Flat Thunk routines:
1236 /***********************************************************************
1237 * ThunkConnect16 (KERNEL.651)
1238 * Connects a 32bit and a 16bit thunkbuffer.
1240 UINT WINAPI
ThunkConnect16(
1241 LPSTR module16
, /* [in] name of win16 dll */
1242 LPSTR module32
, /* [in] name of win32 dll */
1243 HINSTANCE16 hInst16
, /* [in] hInst of win16 dll */
1244 DWORD dwReason
, /* [in] initialisation argument */
1245 struct ThunkDataCommon
*TD
, /* [in/out] thunkbuffer */
1246 LPSTR thunkfun32
, /* [in] win32 thunkfunction */
1247 WORD cs
/* [in] CS of win16 dll */
1251 if (!strncmp(TD
->magic
, "SL01", 4))
1255 TRACE("SL01 thunk %s (%lx) -> %s (%s), Reason: %ld\n",
1256 module16
, (DWORD
)TD
, module32
, thunkfun32
, dwReason
);
1258 else if (!strncmp(TD
->magic
, "LS01", 4))
1260 directionSL
= FALSE
;
1262 TRACE("LS01 thunk %s (%lx) <- %s (%s), Reason: %ld\n",
1263 module16
, (DWORD
)TD
, module32
, thunkfun32
, dwReason
);
1267 ERR("Invalid magic %c%c%c%c\n",
1268 TD
->magic
[0], TD
->magic
[1], TD
->magic
[2], TD
->magic
[3]);
1274 case DLL_PROCESS_ATTACH
:
1277 struct ThunkDataSL16
*SL16
= (struct ThunkDataSL16
*)TD
;
1278 struct ThunkDataSL
*SL
= SL16
->fpData
;
1282 SL
= HeapAlloc(GetProcessHeap(), 0, sizeof(*SL
));
1284 SL
->common
= SL16
->common
;
1285 SL
->flags1
= SL16
->flags1
;
1286 SL
->flags2
= SL16
->flags2
;
1288 SL
->apiDB
= MapSL(SL16
->apiDatabase
);
1289 SL
->targetDB
= NULL
;
1291 lstrcpynA(SL
->pszDll16
, module16
, 255);
1292 lstrcpynA(SL
->pszDll32
, module32
, 255);
1294 /* We should create a SEGPTR to the ThunkDataSL,
1295 but since the contents are not in the original format,
1296 any access to this by 16-bit code would crash anyway. */
1302 if (SL
->flags2
& 0x80000000)
1304 TRACE("Preloading 32-bit library\n");
1305 LoadLibraryA(module32
);
1314 case DLL_PROCESS_DETACH
:
1315 /* FIXME: cleanup */
1323 /***********************************************************************
1324 * C16ThkSL (KERNEL.630)
1327 void WINAPI
C16ThkSL(CONTEXT86
*context
)
1329 LPBYTE stub
= MapSL(context
->Eax
), x
= stub
;
1330 WORD cs
= wine_get_cs();
1331 WORD ds
= wine_get_ds();
1333 /* We produce the following code:
1338 * mov edx, es:[ecx + $EDX]
1343 * call __FLATCS:__wine_call_from_16_thunk
1346 *x
++ = 0xB8; *((WORD
*)x
)++ = ds
;
1347 *x
++ = 0x8E; *x
++ = 0xC0;
1348 *x
++ = 0x66; *x
++ = 0x0F; *x
++ = 0xB7; *x
++ = 0xC9;
1349 *x
++ = 0x67; *x
++ = 0x66; *x
++ = 0x26; *x
++ = 0x8B;
1350 *x
++ = 0x91; *((DWORD
*)x
)++ = context
->Edx
;
1353 *x
++ = 0x66; *x
++ = 0x52;
1355 *x
++ = 0x66; *x
++ = 0x52;
1356 *x
++ = 0x66; *x
++ = 0x9A; *((DWORD
*)x
)++ = (DWORD
)__wine_call_from_16_thunk
;
1357 *((WORD
*)x
)++ = cs
;
1359 /* Jump to the stub code just created */
1360 context
->Eip
= LOWORD(context
->Eax
);
1361 context
->SegCs
= HIWORD(context
->Eax
);
1363 /* Since C16ThkSL got called by a jmp, we need to leave the
1364 original return address on the stack */
1368 /***********************************************************************
1369 * C16ThkSL01 (KERNEL.631)
1372 void WINAPI
C16ThkSL01(CONTEXT86
*context
)
1374 LPBYTE stub
= MapSL(context
->Eax
), x
= stub
;
1378 struct ThunkDataSL16
*SL16
= MapSL(context
->Edx
);
1379 struct ThunkDataSL
*td
= SL16
->fpData
;
1381 DWORD procAddress
= (DWORD
)GetProcAddress16(GetModuleHandle16("KERNEL"), (LPCSTR
)631);
1382 WORD cs
= wine_get_cs();
1386 ERR("ThunkConnect16 was not called!\n");
1390 TRACE("Creating stub for ThunkDataSL %08lx\n", (DWORD
)td
);
1393 /* We produce the following code:
1402 * call __FLATCS:__wine_call_from_16_thunk
1405 *x
++ = 0x66; *x
++ = 0x33; *x
++ = 0xC0;
1406 *x
++ = 0x66; *x
++ = 0xBA; *((DWORD
*)x
)++ = (DWORD
)td
;
1407 *x
++ = 0x9A; *((DWORD
*)x
)++ = procAddress
;
1410 *x
++ = 0x66; *x
++ = 0x52;
1412 *x
++ = 0x66; *x
++ = 0x52;
1413 *x
++ = 0x66; *x
++ = 0x9A; *((DWORD
*)x
)++ = (DWORD
)__wine_call_from_16_thunk
;
1414 *((WORD
*)x
)++ = cs
;
1416 /* Jump to the stub code just created */
1417 context
->Eip
= LOWORD(context
->Eax
);
1418 context
->SegCs
= HIWORD(context
->Eax
);
1420 /* Since C16ThkSL01 got called by a jmp, we need to leave the
1421 orginal return address on the stack */
1426 struct ThunkDataSL
*td
= (struct ThunkDataSL
*)context
->Edx
;
1427 DWORD targetNr
= CX_reg(context
) / 4;
1428 struct SLTargetDB
*tdb
;
1430 TRACE("Process %08lx calling target %ld of ThunkDataSL %08lx\n",
1431 GetCurrentProcessId(), targetNr
, (DWORD
)td
);
1433 for (tdb
= td
->targetDB
; tdb
; tdb
= tdb
->next
)
1434 if (tdb
->process
== GetCurrentProcessId())
1439 TRACE("Loading 32-bit library %s\n", td
->pszDll32
);
1440 LoadLibraryA(td
->pszDll32
);
1442 for (tdb
= td
->targetDB
; tdb
; tdb
= tdb
->next
)
1443 if (tdb
->process
== GetCurrentProcessId())
1449 context
->Edx
= tdb
->targetTable
[targetNr
];
1451 TRACE("Call target is %08lx\n", context
->Edx
);
1455 WORD
*stack
= MapSL( MAKESEGPTR(context
->SegSs
, LOWORD(context
->Esp
)) );
1456 DX_reg(context
) = HIWORD(td
->apiDB
[targetNr
].errorReturnValue
);
1457 AX_reg(context
) = LOWORD(td
->apiDB
[targetNr
].errorReturnValue
);
1458 context
->Eip
= stack
[2];
1459 context
->SegCs
= stack
[3];
1460 context
->Esp
+= td
->apiDB
[targetNr
].nrArgBytes
+ 4;
1462 ERR("Process %08lx did not ThunkConnect32 %s to %s\n",
1463 GetCurrentProcessId(), td
->pszDll32
, td
->pszDll16
);
1469 /***********************************************************************
1470 * 16<->32 Thunklet/Callback API:
1473 #include "pshpack1.h"
1474 typedef struct _THUNKLET
1489 struct _THUNKLET
*next
;
1491 #include "poppack.h"
1493 #define THUNKLET_TYPE_LS 1
1494 #define THUNKLET_TYPE_SL 2
1496 static HANDLE ThunkletHeap
= 0;
1497 static WORD ThunkletCodeSel
;
1498 static THUNKLET
*ThunkletAnchor
= NULL
;
1500 static FARPROC ThunkletSysthunkGlueLS
= 0;
1501 static SEGPTR ThunkletSysthunkGlueSL
= 0;
1503 static FARPROC ThunkletCallbackGlueLS
= 0;
1504 static SEGPTR ThunkletCallbackGlueSL
= 0;
1507 /* map a thunk allocated on ThunkletHeap to a 16-bit pointer */
1508 inline static SEGPTR
get_segptr( void *thunk
)
1510 if (!thunk
) return 0;
1511 return MAKESEGPTR( ThunkletCodeSel
, (char *)thunk
- (char *)ThunkletHeap
);
1514 /***********************************************************************
1517 static BOOL
THUNK_Init(void)
1521 ThunkletHeap
= HeapCreate( 0, 0x10000, 0x10000 );
1522 if (!ThunkletHeap
) return FALSE
;
1524 ThunkletCodeSel
= SELECTOR_AllocBlock( (void *)ThunkletHeap
, 0x10000, WINE_LDT_FLAGS_CODE
);
1526 thunk
= HeapAlloc( ThunkletHeap
, 0, 5 );
1527 if (!thunk
) return FALSE
;
1529 ThunkletSysthunkGlueLS
= (FARPROC
)thunk
;
1530 *thunk
++ = 0x58; /* popl eax */
1531 *thunk
++ = 0xC3; /* ret */
1533 ThunkletSysthunkGlueSL
= get_segptr( thunk
);
1534 *thunk
++ = 0x66; *thunk
++ = 0x58; /* popl eax */
1535 *thunk
++ = 0xCB; /* lret */
1540 /***********************************************************************
1541 * SetThunkletCallbackGlue (KERNEL.560)
1543 void WINAPI
SetThunkletCallbackGlue16( FARPROC glueLS
, SEGPTR glueSL
)
1545 ThunkletCallbackGlueLS
= glueLS
;
1546 ThunkletCallbackGlueSL
= glueSL
;
1550 /***********************************************************************
1551 * THUNK_FindThunklet
1553 THUNKLET
*THUNK_FindThunklet( DWORD target
, DWORD relay
,
1554 DWORD glue
, BYTE type
)
1558 for (thunk
= ThunkletAnchor
; thunk
; thunk
= thunk
->next
)
1559 if ( thunk
->type
== type
1560 && thunk
->target
== target
1561 && thunk
->relay
== relay
1562 && ( type
== THUNKLET_TYPE_LS
?
1563 ( thunk
->glue
== glue
- (DWORD
)&thunk
->type
)
1564 : ( thunk
->glue
== glue
) ) )
1570 /***********************************************************************
1571 * THUNK_AllocLSThunklet
1573 FARPROC
THUNK_AllocLSThunklet( SEGPTR target
, DWORD relay
,
1574 FARPROC glue
, HTASK16 owner
)
1576 THUNKLET
*thunk
= THUNK_FindThunklet( (DWORD
)target
, relay
, (DWORD
)glue
,
1580 TDB
*pTask
= TASK_GetPtr( owner
);
1582 if (!ThunkletHeap
) THUNK_Init();
1583 if ( !(thunk
= HeapAlloc( ThunkletHeap
, 0, sizeof(THUNKLET
) )) )
1586 thunk
->prefix_target
= thunk
->prefix_relay
= 0x90;
1587 thunk
->pushl_target
= thunk
->pushl_relay
= 0x68;
1588 thunk
->jmp_glue
= 0xE9;
1590 thunk
->target
= (DWORD
)target
;
1591 thunk
->relay
= (DWORD
)relay
;
1592 thunk
->glue
= (DWORD
)glue
- (DWORD
)&thunk
->type
;
1594 thunk
->type
= THUNKLET_TYPE_LS
;
1595 thunk
->owner
= pTask
? pTask
->hInstance
: 0;
1597 thunk
->next
= ThunkletAnchor
;
1598 ThunkletAnchor
= thunk
;
1601 return (FARPROC
)thunk
;
1604 /***********************************************************************
1605 * THUNK_AllocSLThunklet
1607 SEGPTR
THUNK_AllocSLThunklet( FARPROC target
, DWORD relay
,
1608 SEGPTR glue
, HTASK16 owner
)
1610 THUNKLET
*thunk
= THUNK_FindThunklet( (DWORD
)target
, relay
, (DWORD
)glue
,
1614 TDB
*pTask
= TASK_GetPtr( owner
);
1616 if (!ThunkletHeap
) THUNK_Init();
1617 if ( !(thunk
= HeapAlloc( ThunkletHeap
, 0, sizeof(THUNKLET
) )) )
1620 thunk
->prefix_target
= thunk
->prefix_relay
= 0x66;
1621 thunk
->pushl_target
= thunk
->pushl_relay
= 0x68;
1622 thunk
->jmp_glue
= 0xEA;
1624 thunk
->target
= (DWORD
)target
;
1625 thunk
->relay
= (DWORD
)relay
;
1626 thunk
->glue
= (DWORD
)glue
;
1628 thunk
->type
= THUNKLET_TYPE_SL
;
1629 thunk
->owner
= pTask
? pTask
->hInstance
: 0;
1631 thunk
->next
= ThunkletAnchor
;
1632 ThunkletAnchor
= thunk
;
1635 return get_segptr( thunk
);
1638 /**********************************************************************
1641 BOOL16 WINAPI
IsLSThunklet( THUNKLET
*thunk
)
1643 return thunk
->prefix_target
== 0x90 && thunk
->pushl_target
== 0x68
1644 && thunk
->prefix_relay
== 0x90 && thunk
->pushl_relay
== 0x68
1645 && thunk
->jmp_glue
== 0xE9 && thunk
->type
== THUNKLET_TYPE_LS
;
1648 /**********************************************************************
1649 * IsSLThunklet (KERNEL.612)
1651 BOOL16 WINAPI
IsSLThunklet16( THUNKLET
*thunk
)
1653 return thunk
->prefix_target
== 0x66 && thunk
->pushl_target
== 0x68
1654 && thunk
->prefix_relay
== 0x66 && thunk
->pushl_relay
== 0x68
1655 && thunk
->jmp_glue
== 0xEA && thunk
->type
== THUNKLET_TYPE_SL
;
1660 /***********************************************************************
1661 * AllocLSThunkletSysthunk (KERNEL.607)
1663 FARPROC WINAPI
AllocLSThunkletSysthunk16( SEGPTR target
,
1664 FARPROC relay
, DWORD dummy
)
1666 if (!ThunkletSysthunkGlueLS
) THUNK_Init();
1667 return THUNK_AllocLSThunklet( (SEGPTR
)relay
, (DWORD
)target
,
1668 ThunkletSysthunkGlueLS
, GetCurrentTask() );
1671 /***********************************************************************
1672 * AllocSLThunkletSysthunk (KERNEL.608)
1674 SEGPTR WINAPI
AllocSLThunkletSysthunk16( FARPROC target
,
1675 SEGPTR relay
, DWORD dummy
)
1677 if (!ThunkletSysthunkGlueSL
) THUNK_Init();
1678 return THUNK_AllocSLThunklet( (FARPROC
)relay
, (DWORD
)target
,
1679 ThunkletSysthunkGlueSL
, GetCurrentTask() );
1683 /***********************************************************************
1684 * AllocLSThunkletCallbackEx (KERNEL.567)
1686 FARPROC WINAPI
AllocLSThunkletCallbackEx16( SEGPTR target
,
1687 DWORD relay
, HTASK16 task
)
1689 THUNKLET
*thunk
= MapSL( target
);
1690 if ( !thunk
) return NULL
;
1692 if ( IsSLThunklet16( thunk
) && thunk
->relay
== relay
1693 && thunk
->glue
== (DWORD
)ThunkletCallbackGlueSL
)
1694 return (FARPROC
)thunk
->target
;
1696 return THUNK_AllocLSThunklet( target
, relay
,
1697 ThunkletCallbackGlueLS
, task
);
1700 /***********************************************************************
1701 * AllocSLThunkletCallbackEx (KERNEL.568)
1703 SEGPTR WINAPI
AllocSLThunkletCallbackEx16( FARPROC target
,
1704 DWORD relay
, HTASK16 task
)
1706 THUNKLET
*thunk
= (THUNKLET
*)target
;
1707 if ( !thunk
) return 0;
1709 if ( IsLSThunklet( thunk
) && thunk
->relay
== relay
1710 && thunk
->glue
== (DWORD
)ThunkletCallbackGlueLS
- (DWORD
)&thunk
->type
)
1711 return (SEGPTR
)thunk
->target
;
1713 return THUNK_AllocSLThunklet( target
, relay
,
1714 ThunkletCallbackGlueSL
, task
);
1717 /***********************************************************************
1718 * AllocLSThunkletCallback (KERNEL.561)
1719 * AllocLSThunkletCallback_dup (KERNEL.606)
1721 FARPROC WINAPI
AllocLSThunkletCallback16( SEGPTR target
, DWORD relay
)
1723 return AllocLSThunkletCallbackEx16( target
, relay
, GetCurrentTask() );
1726 /***********************************************************************
1727 * AllocSLThunkletCallback (KERNEL.562)
1728 * AllocSLThunkletCallback_dup (KERNEL.605)
1730 SEGPTR WINAPI
AllocSLThunkletCallback16( FARPROC target
, DWORD relay
)
1732 return AllocSLThunkletCallbackEx16( target
, relay
, GetCurrentTask() );
1735 /***********************************************************************
1736 * FindLSThunkletCallback (KERNEL.563)
1737 * FindLSThunkletCallback_dup (KERNEL.609)
1739 FARPROC WINAPI
FindLSThunkletCallback( SEGPTR target
, DWORD relay
)
1741 THUNKLET
*thunk
= MapSL( target
);
1742 if ( thunk
&& IsSLThunklet16( thunk
) && thunk
->relay
== relay
1743 && thunk
->glue
== (DWORD
)ThunkletCallbackGlueSL
)
1744 return (FARPROC
)thunk
->target
;
1746 thunk
= THUNK_FindThunklet( (DWORD
)target
, relay
,
1747 (DWORD
)ThunkletCallbackGlueLS
,
1749 return (FARPROC
)thunk
;
1752 /***********************************************************************
1753 * FindSLThunkletCallback (KERNEL.564)
1754 * FindSLThunkletCallback_dup (KERNEL.610)
1756 SEGPTR WINAPI
FindSLThunkletCallback( FARPROC target
, DWORD relay
)
1758 THUNKLET
*thunk
= (THUNKLET
*)target
;
1759 if ( thunk
&& IsLSThunklet( thunk
) && thunk
->relay
== relay
1760 && thunk
->glue
== (DWORD
)ThunkletCallbackGlueLS
- (DWORD
)&thunk
->type
)
1761 return (SEGPTR
)thunk
->target
;
1763 thunk
= THUNK_FindThunklet( (DWORD
)target
, relay
,
1764 (DWORD
)ThunkletCallbackGlueSL
,
1766 return get_segptr( thunk
);
1770 /***********************************************************************
1771 * FreeThunklet (KERNEL.611)
1773 BOOL16 WINAPI
FreeThunklet16( DWORD unused1
, DWORD unused2
)
1779 /***********************************************************************
1780 * Callback Client API
1783 #define N_CBC_FIXED 20
1784 #define N_CBC_VARIABLE 10
1785 #define N_CBC_TOTAL (N_CBC_FIXED + N_CBC_VARIABLE)
1787 static SEGPTR CBClientRelay16
[ N_CBC_TOTAL
];
1788 static FARPROC
*CBClientRelay32
[ N_CBC_TOTAL
];
1790 /***********************************************************************
1791 * RegisterCBClient (KERNEL.619)
1793 INT16 WINAPI
RegisterCBClient16( INT16 wCBCId
,
1794 SEGPTR relay16
, FARPROC
*relay32
)
1796 /* Search for free Callback ID */
1798 for ( wCBCId
= N_CBC_FIXED
; wCBCId
< N_CBC_TOTAL
; wCBCId
++ )
1799 if ( !CBClientRelay16
[ wCBCId
] )
1802 /* Register Callback ID */
1803 if ( wCBCId
> 0 && wCBCId
< N_CBC_TOTAL
)
1805 CBClientRelay16
[ wCBCId
] = relay16
;
1806 CBClientRelay32
[ wCBCId
] = relay32
;
1814 /***********************************************************************
1815 * UnRegisterCBClient (KERNEL.622)
1817 INT16 WINAPI
UnRegisterCBClient16( INT16 wCBCId
,
1818 SEGPTR relay16
, FARPROC
*relay32
)
1820 if ( wCBCId
>= N_CBC_FIXED
&& wCBCId
< N_CBC_TOTAL
1821 && CBClientRelay16
[ wCBCId
] == relay16
1822 && CBClientRelay32
[ wCBCId
] == relay32
)
1824 CBClientRelay16
[ wCBCId
] = 0;
1825 CBClientRelay32
[ wCBCId
] = 0;
1834 /***********************************************************************
1835 * InitCBClient (KERNEL.623)
1837 void WINAPI
InitCBClient16( FARPROC glueLS
)
1839 HMODULE16 kernel
= GetModuleHandle16( "KERNEL" );
1840 SEGPTR glueSL
= (SEGPTR
)GetProcAddress16( kernel
, (LPCSTR
)604 );
1842 SetThunkletCallbackGlue16( glueLS
, glueSL
);
1845 /***********************************************************************
1846 * CBClientGlueSL (KERNEL.604)
1848 void WINAPI
CBClientGlueSL( CONTEXT86
*context
)
1850 /* Create stack frame */
1851 SEGPTR stackSeg
= stack16_push( 12 );
1852 LPWORD stackLin
= MapSL( stackSeg
);
1853 SEGPTR glue
, *glueTab
;
1855 stackLin
[3] = BP_reg( context
);
1856 stackLin
[2] = SI_reg( context
);
1857 stackLin
[1] = DI_reg( context
);
1858 stackLin
[0] = context
->SegDs
;
1860 context
->Ebp
= OFFSETOF( stackSeg
) + 6;
1861 context
->Esp
= OFFSETOF( stackSeg
) - 4;
1864 /* Jump to 16-bit relay code */
1865 glueTab
= MapSL( CBClientRelay16
[ stackLin
[5] ] );
1866 glue
= glueTab
[ stackLin
[4] ];
1867 context
->SegCs
= SELECTOROF( glue
);
1868 context
->Eip
= OFFSETOF ( glue
);
1871 /***********************************************************************
1872 * CBClientThunkSL (KERNEL.620)
1874 extern DWORD
CALL32_CBClient( FARPROC proc
, LPWORD args
, DWORD
*esi
);
1875 void WINAPI
CBClientThunkSL( CONTEXT86
*context
)
1877 /* Call 32-bit relay code */
1879 LPWORD args
= MapSL( MAKESEGPTR( context
->SegSs
, BP_reg( context
) ) );
1880 FARPROC proc
= CBClientRelay32
[ args
[2] ][ args
[1] ];
1882 context
->Eax
= CALL32_CBClient( proc
, args
, &context
->Esi
);
1885 /***********************************************************************
1886 * CBClientThunkSLEx (KERNEL.621)
1888 extern DWORD
CALL32_CBClientEx( FARPROC proc
, LPWORD args
, DWORD
*esi
, INT
*nArgs
);
1889 void WINAPI
CBClientThunkSLEx( CONTEXT86
*context
)
1891 /* Call 32-bit relay code */
1893 LPWORD args
= MapSL( MAKESEGPTR( context
->SegSs
, BP_reg( context
) ) );
1894 FARPROC proc
= CBClientRelay32
[ args
[2] ][ args
[1] ];
1898 context
->Eax
= CALL32_CBClientEx( proc
, args
, &context
->Esi
, &nArgs
);
1900 /* Restore registers saved by CBClientGlueSL */
1901 stackLin
= (LPWORD
)((LPBYTE
)CURRENT_STACK16
+ sizeof(STACK16FRAME
) - 4);
1902 BP_reg( context
) = stackLin
[3];
1903 SI_reg( context
) = stackLin
[2];
1904 DI_reg( context
) = stackLin
[1];
1905 context
->SegDs
= stackLin
[0];
1906 context
->Esp
+= 16+nArgs
;
1908 /* Return to caller of CBClient thunklet */
1909 context
->SegCs
= stackLin
[9];
1910 context
->Eip
= stackLin
[8];
1914 /***********************************************************************
1915 * Get16DLLAddress (KERNEL32.@)
1917 * This function is used by a Win32s DLL if it wants to call a Win16 function.
1918 * A 16:16 segmented pointer to the function is returned.
1919 * Written without any docu.
1921 SEGPTR WINAPI
Get16DLLAddress(HMODULE handle
, LPSTR func_name
)
1923 static WORD code_sel32
;
1929 if (!ThunkletHeap
) THUNK_Init();
1930 code_sel32
= SELECTOR_AllocBlock( (void *)ThunkletHeap
, 0x10000,
1931 WINE_LDT_FLAGS_CODE
| WINE_LDT_FLAGS_32BIT
);
1932 if (!code_sel32
) return 0;
1934 if (!(thunk
= HeapAlloc( ThunkletHeap
, 0, 32 ))) return 0;
1936 if (!handle
) handle
= GetModuleHandle16("WIN32S16");
1937 proc_16
= GetProcAddress16(handle
, func_name
);
1939 /* movl proc_16, $edx */
1941 *(FARPROC16
*)thunk
= proc_16
;
1942 thunk
+= sizeof(FARPROC16
);
1946 *(FARPROC
*)thunk
= GetProcAddress(GetModuleHandleA("KERNEL32"),"QT_Thunk");
1947 thunk
+= sizeof(FARPROC16
);
1948 *(WORD
*)thunk
= wine_get_cs();
1950 return MAKESEGPTR( code_sel32
, (char *)thunk
- (char *)ThunkletHeap
);
1954 /***********************************************************************
1955 * GetWin16DOSEnv (KERNEL32.34)
1956 * Returns some internal value.... probably the default environment database?
1958 DWORD WINAPI
GetWin16DOSEnv()
1960 FIXME("stub, returning 0\n");
1964 /**********************************************************************
1965 * GetPK16SysVar (KERNEL32.92)
1967 LPVOID WINAPI
GetPK16SysVar(void)
1969 static BYTE PK16SysVar
[128];
1975 /**********************************************************************
1976 * CommonUnimpStub (KERNEL32.17)
1978 void WINAPI
CommonUnimpStub( CONTEXT86
*context
)
1981 MESSAGE( "*** Unimplemented Win32 API: %s\n", (LPSTR
)context
->Eax
);
1983 switch ((context
->Ecx
>> 4) & 0x0f)
1985 case 15: context
->Eax
= -1; break;
1986 case 14: context
->Eax
= 0x78; break;
1987 case 13: context
->Eax
= 0x32; break;
1988 case 1: context
->Eax
= 1; break;
1989 default: context
->Eax
= 0; break;
1992 context
->Esp
+= (context
->Ecx
& 0x0f) * 4;
1995 /**********************************************************************
1996 * HouseCleanLogicallyDeadHandles (KERNEL32.33)
1998 void WINAPI
HouseCleanLogicallyDeadHandles(void)
2000 /* Whatever this is supposed to do, our handles probably
2001 don't need it :-) */
2004 /**********************************************************************
2007 BOOL WINAPI
_KERNEL32_100(HANDLE threadid
,DWORD exitcode
,DWORD x
)
2009 FIXME("(%d,%ld,0x%08lx): stub\n",threadid
,exitcode
,x
);
2013 /**********************************************************************
2016 * Checks whether the clock has to be switched from daylight
2017 * savings time to standard time or vice versa.
2020 DWORD WINAPI
_KERNEL32_99(DWORD x
)
2022 FIXME("(0x%08lx): stub\n",x
);
2027 /**********************************************************************
2030 * Real prototype is:
2031 * INT16 WINAPI Catch( LPCATCHBUF lpbuf );
2033 void WINAPI
Catch16( LPCATCHBUF lpbuf
, CONTEXT86
*context
)
2035 /* Note: we don't save the current ss, as the catch buffer is */
2036 /* only 9 words long. Hopefully no one will have the silly */
2037 /* idea to change the current stack before calling Throw()... */
2051 lpbuf
[0] = LOWORD(context
->Eip
);
2052 lpbuf
[1] = context
->SegCs
;
2053 /* Windows pushes 4 more words before saving sp */
2054 lpbuf
[2] = LOWORD(context
->Esp
) - 4 * sizeof(WORD
);
2055 lpbuf
[3] = LOWORD(context
->Ebp
);
2056 lpbuf
[4] = LOWORD(context
->Esi
);
2057 lpbuf
[5] = LOWORD(context
->Edi
);
2058 lpbuf
[6] = context
->SegDs
;
2060 lpbuf
[8] = context
->SegSs
;
2061 AX_reg(context
) = 0; /* Return 0 */
2065 /**********************************************************************
2068 * Real prototype is:
2069 * INT16 WINAPI Throw( LPCATCHBUF lpbuf, INT16 retval );
2071 void WINAPI
Throw16( LPCATCHBUF lpbuf
, INT16 retval
, CONTEXT86
*context
)
2073 STACK16FRAME
*pFrame
;
2074 STACK32FRAME
*frame32
;
2075 TEB
*teb
= NtCurrentTeb();
2077 AX_reg(context
) = retval
;
2079 /* Find the frame32 corresponding to the frame16 we are jumping to */
2080 pFrame
= THREAD_STACK16(teb
);
2081 frame32
= pFrame
->frame32
;
2082 while (frame32
&& frame32
->frame16
)
2084 if (OFFSETOF(frame32
->frame16
) < OFFSETOF(teb
->cur_stack
))
2085 break; /* Something strange is going on */
2086 if (OFFSETOF(frame32
->frame16
) > lpbuf
[2])
2088 /* We found the right frame */
2089 pFrame
->frame32
= frame32
;
2092 frame32
= ((STACK16FRAME
*)MapSL(frame32
->frame16
))->frame32
;
2095 context
->Eip
= lpbuf
[0];
2096 context
->SegCs
= lpbuf
[1];
2097 context
->Esp
= lpbuf
[2] + 4 * sizeof(WORD
) - sizeof(WORD
) /*extra arg*/;
2098 context
->Ebp
= lpbuf
[3];
2099 context
->Esi
= lpbuf
[4];
2100 context
->Edi
= lpbuf
[5];
2101 context
->SegDs
= lpbuf
[6];
2103 if (lpbuf
[8] != context
->SegSs
)
2104 ERR("Switching stack segment with Throw() not supported; expect crash now\n" );