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source: trunk/src/kernel32/exceptions.cpp@ 8548

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Last change on this file since 8548 was 8548, checked in by sandervl, 23 years ago
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1	/* $Id: exceptions.cpp,v 1.59 2002-06-02 12:42:09 sandervl Exp $ */
2
3	/*
4	* Win32 Exception functions for OS/2
5	*
6	* Ported Wine exception handling code
7	*
8	* Copyright 1998 Sander van Leeuwen (OS/2 port)
9	*
10	*
11	* Project Odin Software License can be found in LICENSE.TXT
12	*
13	*
14	* (dlls\ntdll\exception.c)
15	*
16	* Copyright 1999 Turchanov Sergey
17	* Copyright 1999 Alexandre Julliard
18	*
19	* (win32\except.c)
20	*
21	* Win32 exception functions
22	*
23	* Copyright (c) 1996 Onno Hovers, (onno@stack.urc.tue.nl)
24	*
25	* Notes:
26	* What really happens behind the scenes of those new
27	* __try{...}__except(..){....} and
28	* __try{...}__finally{...}
29	* statements is simply not documented by Microsoft. There could be different
30	* reasons for this:
31	* One reason could be that they try to hide the fact that exception
32	* handling in Win32 looks almost the same as in OS/2 2.x.
33	* Another reason could be that Microsoft does not want others to write
34	* binary compatible implementations of the Win32 API (like us).
35	*
36	* Whatever the reason, THIS SUCKS!! Ensuring portabilty or future
37	* compatability may be valid reasons to keep some things undocumented.
38	* But exception handling is so basic to Win32 that it should be
39	* documented!
40	*
41	* Fixmes:
42	* -Most functions need better parameter checking.
43	* -I do not know how to handle exceptions within an exception handler.
44	* or what is done when ExceptionNestedException is returned from an
45	* exception handler
46	* -Real exceptions are not yet implemented. only the exception functions
47	* are implemented. A real implementation needs some new code in
48	* loader/signal.c. There would also be a need for showing debugging
49	* information in UnhandledExceptionFilter.
50	*
51	*/
52	#define INCL_MISC
53	#define INCL_BASE
54	#define INCL_WINBUTTONS
55	#include <os2wrap.h> //Odin32 OS/2 api wrappers
56	#include <stdio.h>
57	#include <stdlib.h>
58	#include <assert.h>
59	#include <string.h>
60	#include "exceptions.h"
61	#include "exceptutil.h"
62	#include <misc.h>
63	#include "mmap.h"
64	#include <wprocess.h>
65	#include "oslibexcept.h"
66	#include "exceptstackdump.h"
67
68	#include "WinImageBase.h"
69	#include "WinDllBase.h"
70	#include "WinExeBase.h"
71
72	#define DBG_LOCALLOG DBG_exceptions
73	#include "dbglocal.h"
74
75	#ifdef WITH_KLIB
76	/* quick and dirty - don't wanna mess with includes. */
77	typedef enum { enmRead, enmWrite, enmUnknown } ENMACCESS;
78	BOOL _Optlink kHeapDbgException(void * pvAccess,
79	ENMACCESS enmAccess,
80	void * pvIP,
81	void * pvOS);
82	#endif
83
84	/* Exception record for handling exceptions happening inside exception handlers */
85	typedef struct
86	{
87	WINEXCEPTION_FRAME frame;
88	WINEXCEPTION_FRAME *prevFrame;
89	} EXC_NESTED_FRAME;
90
91	//Global Process Unhandled exception filter
92	static LPTOP_LEVEL_EXCEPTION_FILTER CurrentUnhExceptionFlt = NULL;
93	static UINT CurrentErrorMode = 0;
94	static PEXCEPTION_HANDLER StartupCodeHandler = NULL;
95
96	extern "C" PWINEXCEPTION_FRAME GetExceptionRecord(ULONG offset, ULONG segment);
97
98	LONG WIN32API UnhandledExceptionFilter(PWINEXCEPTION_POINTERS lpexpExceptionInfo);
99	void KillWin32Process(void);
100
101	#ifdef DEBUG
102	void PrintWin32ExceptionChain(PWINEXCEPTION_FRAME pframe);
103	#else
104	#define PrintWin32ExceptionChain(a)
105	#endif
106
107	/*****************************************************************************
108	* Name : UINT SetErrorMode
109	* Purpose :
110	* Parameters: UINT fuErrorMode
111	* Variables :
112	* Result :
113	* Remark :
114	* Status :
115	*
116	* Author : Sander van Leeuwen [Tue, 1999/07/01 09:00]
117	*****************************************************************************/
118
119	UINT WIN32API SetErrorMode(UINT fuErrorMode)
120	{
121	UINT oldmode = CurrentErrorMode;
122
123	dprintf(("KERNEL32: SetErrorMode(%08xh)\n",
124	fuErrorMode));
125	CurrentErrorMode = fuErrorMode;
126
127	if(fuErrorMode & SEM_FAILCRITICALERRORS \|\| fuErrorMode & SEM_NOOPENFILEERRORBOX)
128	DosError(FERR_DISABLEHARDERR);
129	else
130	DosError(FERR_ENABLEHARDERR);
131
132	// SEM_NOGPFAULTERRORBOX and SEM_NOALIGNMENTFAULTEXCEPT --> UnhandledExceptionFilter()
133
134	return(oldmode);
135	}
136
137	#if 0
138	static inline WINEXCEPTION_FRAME * EXC_push_frame( WINEXCEPTION_FRAME *frame )
139	{
140	// TODO: rewrite in assembly
141	TEB *teb = GetThreadTEB();
142	frame->Prev = (PWINEXCEPTION_FRAME)teb->except;
143	teb->except = frame;
144	return frame->Prev;
145	}
146
147	static inline WINEXCEPTION_FRAME * EXC_pop_frame( WINEXCEPTION_FRAME *frame )
148	{
149	// TODO: rewrite in assembly
150	TEB *teb = GetThreadTEB();
151	teb->except = frame->Prev;
152	return frame->Prev;
153	}
154	#endif
155
156	/*****************************************************************************
157	* Name : VOID _Pascal OS2RaiseException
158	* Purpose : Unwinds exception handlers (heavily influenced by Wine)
159	* Parameters: ...
160	* Variables :
161	* Result :
162	* Remark :
163	* Status :
164	*
165	* Author : Sander van Leeuwen [Tue, 1999/07/01 09:00]
166	*****************************************************************************/
167
168	void WIN32API RtlRaiseException(WINEXCEPTION_RECORD rec, WINCONTEXT context);
169
170	VOID _Pascal OS2RaiseException(DWORD dwExceptionCode,
171	DWORD dwExceptionFlags,
172	DWORD cArguments,
173	DWORD *lpArguments,
174	DWORD eip, DWORD esp, DWORD ebp, DWORD flags,
175	DWORD eax, DWORD ebx, DWORD ecx, DWORD edx,
176	DWORD edi, DWORD esi, DWORD cs, DWORD ds,
177	DWORD es, DWORD fs, DWORD gs, DWORD ss)
178	{
179	WINEXCEPTION_RECORD record;
180	WINEXCEPTION_POINTERS ExceptionInfo;
181	WINCONTEXT context;
182	int rc;
183	int i;
184
185	dprintf(("KERNEL32: RaiseException(%08xh)\n",
186	dwExceptionCode));
187
188	memset(&record, 0, sizeof(record));
189
190	/* compose an exception record */
191	record.ExceptionCode = dwExceptionCode;
192	record.ExceptionFlags = dwExceptionFlags;
193	record.ExceptionRecord = NULL;
194	record.NumberParameters = cArguments;
195	record.ExceptionAddress = (LPVOID)eip;
196
197	memset(&context, 0, sizeof(context));
198	context.ContextFlags = WINCONTEXT_FULL; //segments, integer, control
199	context.SegGs = gs;
200	context.SegFs = fs;
201	context.SegEs = es;
202	context.SegDs = ds;
203	context.Edi = edi;
204	context.Esi = esi;
205	context.Ebx = ebx;
206	context.Edx = edx;
207	context.Ecx = ecx;
208	context.Eax = eax;
209	context.Ebp = ebp;
210	context.Eip = eip;
211	context.SegCs = cs;
212	context.EFlags = flags;
213	context.Esp = esp;
214	context.SegSs = ss;
215
216	if(lpArguments)
217	{
218	for(i=0;
219	i<cArguments;
220	i++)
221	record.ExceptionInformation[i] = lpArguments[i];
222	}
223
224	rc = RtlDispatchException(&record, &context);
225
226	// and finally, the unhandled exception filter
227	if(rc == ExceptionContinueSearch && UnhandledExceptionFilter != NULL)
228	{
229	dprintf(("KERNEL32: RaiseException calling UnhandledExceptionFilter.\n"));
230
231	ExceptionInfo.ExceptionRecord = &record;
232	ExceptionInfo.ContextRecord = &context;
233
234	rc = UnhandledExceptionFilter(&ExceptionInfo);
235	//FIXME: UnhandledExceptionFilter does NOT return the same values as
236	// other filters!!
237	}
238
239	// terminate the process
240	if(rc != ExceptionContinueExecution \|\|
241	record.ExceptionFlags & EH_NONCONTINUABLE)
242	{
243	dprintf(("KERNEL32: RaiseException terminating process.\n"));
244	DosExit(EXIT_PROCESS, 0);
245	}
246
247	dprintf(("KERNEL32: RaiseException returns.\n"));
248	return;
249	}
250
251	/*******************************************************************
252	* EXC_RaiseHandler
253	*
254	* Handler for exceptions happening inside a handler.
255	*/
256	static DWORD WIN32API EXC_RaiseHandler( WINEXCEPTION_RECORD rec, WINEXCEPTION_FRAME frame,
257	// WINCONTEXT context, WINEXCEPTION_FRAME *dispatcher )
258	WINCONTEXT *context, LPVOID dispatcher )
259	{
260	if (rec->ExceptionFlags & (EH_UNWINDING \| EH_EXIT_UNWIND))
261	return ExceptionContinueSearch;
262	/* We shouldn't get here so we store faulty frame in dispatcher */
263	(PWINEXCEPTION_FRAME)dispatcher = ((EXC_NESTED_FRAME*)frame)->prevFrame;
264	return ExceptionNestedException;
265	}
266
267	/*******************************************************************
268	* EXC_UnwindHandler
269	*
270	* Handler for exceptions happening inside an unwind handler.
271	*/
272	static DWORD WIN32API EXC_UnwindHandler( WINEXCEPTION_RECORD rec, WINEXCEPTION_FRAME frame,
273	// WINCONTEXT context, WINEXCEPTION_FRAME *dispatcher )
274	WINCONTEXT *context, LPVOID dispatcher )
275	{
276	if (!(rec->ExceptionFlags & (EH_UNWINDING \| EH_EXIT_UNWIND)))
277	return ExceptionContinueSearch;
278	/* We shouldn't get here so we store faulty frame in dispatcher */
279	(PWINEXCEPTION_FRAME)dispatcher = ((EXC_NESTED_FRAME*)frame)->prevFrame;
280	return ExceptionCollidedUnwind;
281	}
282
283	#if 1
284	DWORD EXC_CallHandler( WINEXCEPTION_RECORD record, WINEXCEPTION_FRAME frame,
285	WINCONTEXT context, WINEXCEPTION_FRAME *dispatcher,
286	PEXCEPTION_HANDLER handler, PEXCEPTION_HANDLER nested_handler);
287
288	#else
289	/*******************************************************************
290	* EXC_CallHandler
291	*
292	* Call an exception handler, setting up an exception frame to catch exceptions
293	* happening during the handler execution.
294	* WARNING:
295	* Please do not change the first 4 parameters order in any way - some exceptions handlers
296	* rely on Base Pointer (EBP) to have a fixed position related to the exception frame
297	*/
298	static DWORD EXC_CallHandler( WINEXCEPTION_RECORD record, WINEXCEPTION_FRAME frame,
299	WINCONTEXT context, WINEXCEPTION_FRAME *dispatcher,
300	PEXCEPTION_HANDLER handler, PEXCEPTION_HANDLER nested_handler)
301	{
302	EXC_NESTED_FRAME newframe;
303	DWORD ret;
304
305	newframe.frame.Handler = nested_handler;
306	newframe.prevFrame = frame;
307	EXC_push_frame( &newframe.frame );
308	dprintf(("KERNEL32: Calling handler at %p code=%lx flags=%lx\n",
309	handler, record->ExceptionCode, record->ExceptionFlags));
310	ret = handler( record, frame, context, dispatcher );
311	dprintf(("KERNEL32: Handler returned %lx\n", ret));
312	EXC_pop_frame( &newframe.frame );
313	return ret;
314	}
315	#endif
316	//******************************************************************************
317	//******************************************************************************
318	DWORD RtlDispatchException(WINEXCEPTION_RECORD pRecord, WINCONTEXT pContext)
319	{
320	PWINEXCEPTION_FRAME pFrame, dispatch, nested_frame;
321	int rc;
322
323	// get chain of exception frames
324	rc = ExceptionContinueSearch;
325
326	nested_frame = NULL;
327	TEB *winteb = GetThreadTEB();
328	pFrame = (PWINEXCEPTION_FRAME)winteb->except;
329
330	dprintf(("KERNEL32: RtlDispatchException entered"));
331
332	PrintWin32ExceptionChain(pFrame);
333
334	// walk the exception chain
335	while( (pFrame != NULL) && (pFrame != ((void *)0xFFFFFFFF)) )
336	{
337	dprintf(("KERNEL32: RtlDispatchException - pframe=%08X, pframe->Prev=%08X", pFrame, pFrame->Prev));
338	if (pFrame == pFrame->Prev) {
339	dprintf(("KERNEL32: RtlDispatchException - Invalid exception frame!!"));
340	return 0;
341	}
342
343	dispatch=0;
344
345	/* Check frame address */
346	if (((void*)pFrame < winteb->stack_low) \|\|
347	((void*)(pFrame+1) > winteb->stack_top) \|\|
348	(int)pFrame & 3)
349	{
350	dprintf(("Invalid stack! low=%08X, top=%08X, pframe = %08X",
351	winteb->stack_low, winteb->stack_top, pFrame));
352
353	pRecord->ExceptionFlags \|= EH_STACK_INVALID;
354	break;
355	}
356
357
358	/* call handler */
359	if(pFrame->Handler) {
360	rc = EXC_CallHandler(pRecord, pFrame, pContext, &dispatch, pFrame->Handler, EXC_RaiseHandler );
361	}
362	else {
363	dprintf(("pFrame->Handler is NULL!!!!!"));
364	rc = ExceptionContinueSearch;
365	}
366
367	PrintWin32ExceptionChain(pFrame);
368
369	if (pFrame == nested_frame)
370	{
371	/* no longer nested */
372	nested_frame = NULL;
373	pRecord->ExceptionFlags &= ~EH_NESTED_CALL;
374	}
375
376
377	switch(rc)
378	{
379	case ExceptionContinueExecution:
380	if (!(pRecord->ExceptionFlags & EH_NONCONTINUABLE)) {
381	dprintf(("KERNEL32: RtlDispatchException returns %#x (ContinueExecution)", rc));
382	return rc;
383	}
384	break;
385	case ExceptionContinueSearch:
386	break;
387	case ExceptionNestedException:
388	if (nested_frame < dispatch) nested_frame = dispatch;
389	pRecord->ExceptionFlags \|= EH_NESTED_CALL;
390	break;
391	default:
392	break;
393	}
394
395	dprintf(("KERNEL32: RtlDispatchException - going from frame %08X to previous frame %08X", pFrame, pFrame->Prev));
396	if (pFrame == pFrame->Prev) {
397	dprintf(("KERNEL32: RtlDispatchException - Invalid exception frame!!"));
398	break;
399	}
400	pFrame = pFrame->Prev;
401	}
402	dprintf(("KERNEL32: RtlDispatchException returns %#x", rc));
403	PrintWin32ExceptionChain(pFrame);
404	return rc;
405	}
406	/*****************************************************************************
407	* Name : int _Pascal OS2RtlUnwind
408	* Purpose : Unwinds exception handlers (heavily influenced by Wine)
409	* Parameters: ...
410	* Variables :
411	* Result :
412	* Remark :
413	* Status :
414	*
415	* Author : Sander van Leeuwen [Tue, 1999/07/01 09:00]
416	*****************************************************************************/
417
418	int _Pascal OS2RtlUnwind(PWINEXCEPTION_FRAME pEndFrame,
419	LPVOID unusedEip,
420	PWINEXCEPTION_RECORD pRecord,
421	DWORD returnEax,
422	DWORD eip, DWORD esp, DWORD ebp, DWORD flags,
423	DWORD eax, DWORD ebx, DWORD ecx, DWORD edx,
424	DWORD edi, DWORD esi, DWORD cs, DWORD ds,
425	DWORD es, DWORD fs, DWORD gs, DWORD ss)
426	{
427	PWINEXCEPTION_FRAME frame, dispatch;
428	WINEXCEPTION_RECORD record, newrec;
429	WINCONTEXT context;
430	DWORD rc;
431
432	dprintf(("KERNEL32: RtlUnwind pEndFrame=%08X, unusedEip=%08X, pRecord=%08X, returnEax=%#x\n", pEndFrame, unusedEip, pRecord, returnEax));
433
434
435	memset(&context, 0, sizeof(context));
436	context.ContextFlags = WINCONTEXT_FULL; //segments, integer, control
437	context.SegGs = gs;
438	context.SegFs = fs;
439	context.SegEs = es;
440	context.SegDs = ds;
441	context.Edi = edi;
442	context.Esi = esi;
443	context.Ebx = ebx;
444	context.Edx = edx;
445	context.Ecx = ecx;
446	context.Eax = returnEax;
447	context.Ebp = ebp;
448	context.Eip = eip;
449	context.SegCs = cs;
450	context.EFlags = flags;
451	context.Esp = esp;
452	context.SegSs = ss;
453
454	/* build an exception record, if we do not have one */
455	if(!pRecord)
456	{
457	memset(&record, 0, sizeof(record));
458	record.ExceptionCode = STATUS_UNWIND;
459	record.ExceptionFlags = 0;
460	record.ExceptionRecord = NULL;
461	record.ExceptionAddress = (LPVOID)eip;
462	record.NumberParameters = 0;
463	pRecord = &record;
464	}
465
466	if(pEndFrame) pRecord->ExceptionFlags \|= EH_UNWINDING;
467	else pRecord->ExceptionFlags \|= EH_UNWINDING \| EH_EXIT_UNWIND;
468
469	/* get chain of exception frames */
470	TEB *winteb = GetThreadTEB();
471	frame = (PWINEXCEPTION_FRAME)winteb->except;
472
473	PrintWin32ExceptionChain(frame);
474
475	while ((frame != (PWINEXCEPTION_FRAME)0xffffffff) && (frame != pEndFrame))
476	{
477	/* Check frame address */
478	if (pEndFrame && (frame > pEndFrame))
479	{
480	newrec.ExceptionCode = STATUS_INVALID_UNWIND_TARGET;
481	newrec.ExceptionFlags = EH_NONCONTINUABLE;
482	newrec.ExceptionRecord = pRecord;
483	newrec.NumberParameters = 0;
484	dprintf(("KERNEL32: RtlUnwind terminating thread.\n"));
485	DosExit(EXIT_THREAD, 0);
486	}
487	if (((void*)frame < winteb->stack_low) \|\|
488	((void*)(frame+1) > winteb->stack_top) \|\|
489	(int)frame & 3)
490	{
491	newrec.ExceptionCode = STATUS_BAD_STACK;
492	newrec.ExceptionFlags = EH_NONCONTINUABLE;
493	newrec.ExceptionRecord = pRecord;
494	newrec.NumberParameters = 0;
495	dprintf(("KERNEL32: RtlUnwind terminating thread.\n"));
496	DosExit(EXIT_THREAD, 0);
497	}
498
499	/* Call handler */
500	dprintf(("KERNEL32: RtlUnwind - calling exception handler %08X", frame->Handler));
501	if(frame->Handler) {
502	rc = EXC_CallHandler(pRecord, frame, &context, &dispatch, frame->Handler, EXC_UnwindHandler );
503	}
504	else {
505	dprintf(("pFrame->Handler is NULL!!!!!"));
506	rc = ExceptionContinueSearch;
507	}
508	dprintf(("KERNEL32: RtlUnwind - handler returned %#x", rc));
509	switch (rc)
510	{
511	case ExceptionContinueSearch:
512	break;
513	case ExceptionCollidedUnwind:
514	frame = dispatch;
515	break;
516	default:
517	newrec.ExceptionCode = STATUS_INVALID_DISPOSITION;
518	newrec.ExceptionFlags = EH_NONCONTINUABLE;
519	newrec.ExceptionRecord = pRecord;
520	newrec.NumberParameters = 0;
521	dprintf(("KERNEL32: RtlUnwind terminating thread.\n"));
522	DosExit(EXIT_THREAD, 0);
523	break;
524	}
525	dprintf(("KERNEL32: RtlUnwind (before)- frame=%08X, frame->Prev=%08X", frame, frame->Prev));
526	SetExceptionChain((DWORD)frame->Prev);
527	frame = frame->Prev;
528	dprintf(("KERNEL32: RtlUnwind (after) - frame=%08X, frame->Prev=%08X", frame, frame->Prev));
529	}
530
531	dprintf(("KERNEL32: RtlUnwind returning.\n"));
532	PrintWin32ExceptionChain(frame);
533	return(0);
534	}
535
536
537	/*****************************************************************************
538	* Name : LONG WIN32API UnhandledExceptionFilter
539	* Purpose :
540	* Parameters: ...
541	* Variables :
542	* Result :
543	* Remark :
544	* Status :
545	*
546	* Author : Sander van Leeuwen [Tue, 1999/07/01 09:00]
547	*****************************************************************************/
548
549	LONG WIN32API UnhandledExceptionFilter(PWINEXCEPTION_POINTERS lpexpExceptionInfo)
550	{
551	char szModName[16];
552	char message[128];
553	ULONG iObj;
554	ULONG offObj;
555	HMODULE hmod;
556	DWORD rc;
557
558	#if 0 //not in use...
559	// @@@PH: experimental change to have more control over exception handling
560	#pragma pack(4)
561	typedef struct
562	{
563	ULONG cb; /* Size of fixed part of structure */
564	HPOINTER hIcon; /* Icon handle */
565	ULONG cButtons; /* Number of buttons */
566	ULONG flStyle; /* Icon style flags (MB_ICONQUESTION, etc...)*/
567	HWND hwndNotify; /* Reserved */
568	MB2D mb2d[4]; /* Array of button definitions */
569	} myMB2INFO;
570	#pragma pack()
571
572	myMB2INFO mb2InfoExceptionBox = { 20, // size of structure
573	NULLHANDLE, // icon handle
574	4, // number of buttons
575	MB_ICONHAND, // icon style
576	NULLHANDLE, // reserved
577	{ {"continue ~search", 100, BS_PUSHBUTTON \| BS_TEXT \| BS_AUTOSIZE},
578	{"continue ~execution", 101, BS_PUSHBUTTON \| BS_TEXT \| BS_AUTOSIZE},
579	{"execute ~handler", 102, BS_PUSHBUTTON \| BS_TEXT \| BS_AUTOSIZE \| BS_DEFAULT},
580	{"~terminate process", 103, BS_PUSHBUTTON \| BS_TEXT \| BS_AUTOSIZE} }
581	};
582	#endif
583
584	dprintf(("KERNEL32: Default UnhandledExceptionFilter, CurrentErrorMode=%X", CurrentErrorMode));
585
586	// We must not care about ErrorMode here!! The app expects that its own
587	// UnhandledExceptionFilter will be cared even if it never touched ErrorMode.
588	if(CurrentUnhExceptionFlt) // && !(CurrentErrorMode & (SEM_FAILCRITICALERRORS \| SEM_NOGPFAULTERRORBOX)))
589	{
590	dprintf(("KERNEL32: Calling user UnhandledExceptionFilter"));
591	rc = CurrentUnhExceptionFlt(lpexpExceptionInfo);
592	if(rc != WINEXCEPTION_CONTINUE_SEARCH)
593	return rc;
594	}
595
596
597	if (DosQueryModFromEIP(&hmod, &iObj, sizeof(szModName), szModName, &offObj, (ULONG)lpexpExceptionInfo->ExceptionRecord->ExceptionAddress))
598	sprintf(message,
599	"Unhandled exception 0x%08lx at address 0x%08lx. (DQMFEIP rc=%d)",
600	lpexpExceptionInfo->ExceptionRecord->ExceptionCode,
601	lpexpExceptionInfo->ExceptionRecord->ExceptionAddress);
602	else
603	{
604	if (iObj == -1)
605	{ /* fault in DosAllocMem allocated memory, hence PE loader.. */
606	Win32ImageBase * pMod;
607	if (WinExe && WinExe->insideModule((ULONG)lpexpExceptionInfo->ExceptionRecord->ExceptionAddress))
608	pMod = WinExe;
609	else
610	pMod = Win32DllBase::findModuleByAddr((ULONG)lpexpExceptionInfo->ExceptionRecord->ExceptionAddress);
611	if (pMod != NULL)
612	{
613	szModName[0] = '\0';
614	strncat(szModName, pMod->getModuleName(), sizeof(szModName) - 1);
615	iObj = 0xFF;
616	offObj = (ULONG)lpexpExceptionInfo->ExceptionRecord->ExceptionAddress
617	- (ULONG)pMod->getInstanceHandle();
618	}
619	}
620	sprintf(message,
621	"Unhandled exception 0x%08lx at address 0x%08lx.\r"
622	"Mod: %s obj: 0x%2lx off:0x%08lx",
623	lpexpExceptionInfo->ExceptionRecord->ExceptionCode,
624	lpexpExceptionInfo->ExceptionRecord->ExceptionAddress,
625	szModName, iObj, offObj);
626	}
627
628	/*
629	rc = WinMessageBox2(HWND_DESKTOP,
630	HWND_DESKTOP,
631	message,
632	"Oh, nooo!",
633	0,
634	(PMB2INFO)&mb2InfoExceptionBox);
635	switch (rc)
636	{
637	case 100:
638	return WINEXCEPTION_CONTINUE_SEARCH;
639
640	case 101:
641	return WINEXCEPTION_CONTINUE_EXECUTION;
642
643	case 102:
644	return WINEXCEPTION_EXECUTE_HANDLER;
645
646	case 103:
647	KillWin32Process();
648	// fall-through
649
650	default:
651	return WINEXCEPTION_EXECUTE_HANDLER;
652	}
653	*/
654	rc = WinMessageBox(HWND_DESKTOP,
655	HWND_DESKTOP,
656	message,
657	"Oh, nooo!",
658	0,
659	MB_ABORTRETRYIGNORE \| MB_ERROR);
660	switch (rc)
661	{
662	case MBID_IGNORE:
663	return WINEXCEPTION_CONTINUE_EXECUTION;
664
665	case MBID_ABORT:
666	KillWin32Process();
667	// fall-through
668
669	case MBID_RETRY:
670	default:
671	return WINEXCEPTION_EXECUTE_HANDLER;
672	}
673	}
674
675
676	/*****************************************************************************
677	* Name : LPTOP_LEVEL_EXCEPTION_FILTER WIN32API SetUnhandledExceptionFilter
678	* Purpose :
679	* Parameters: ...
680	* Variables :
681	* Result :
682	* Remark :
683	* Status :
684	*
685	* Author : Sander van Leeuwen [Tue, 1999/07/01 09:00]
686	*****************************************************************************/
687
688	LPTOP_LEVEL_EXCEPTION_FILTER WIN32API SetUnhandledExceptionFilter(LPTOP_LEVEL_EXCEPTION_FILTER lpTopLevelExceptionFilter)
689	{
690	LPTOP_LEVEL_EXCEPTION_FILTER old = CurrentUnhExceptionFlt;
691
692	dprintf(("KERNEL32: SetUnhandledExceptionFilter to %08X\n",
693	lpTopLevelExceptionFilter));
694
695	CurrentUnhExceptionFlt = lpTopLevelExceptionFilter;
696
697	return(old);
698	}
699
700
701	/*****************************************************************************
702	* Name : KillWin32Process
703	* Purpose :
704	* Parameters: ...
705	* Variables :
706	* Result :
707	* Remark :
708	* Status :
709	*
710	* Author : Sander van Leeuwen [Tue, 1999/07/01 09:00]
711	*****************************************************************************/
712
713
714	//******************************************************************************
715	extern "C" ULONG getEAX();
716	extern "C" ULONG getEBX();
717	VOID WIN32API ExitProcess(DWORD exitcode);
718	//******************************************************************************
719	void KillWin32Process(void)
720	{
721	static BOOL fEntry = FALSE;
722
723	if(fEntry == FALSE) {
724	fEntry = TRUE;
725	ExitProcess(666);
726	return;
727	}
728	//Restore original OS/2 TIB selector
729	RestoreOS2FS();
730
731	SetExceptionChain((ULONG)-1);
732	DosExit(EXIT_PROCESS, 666);
733	}
734
735
736	/*****************************************************************************
737	* Name : void static dprintfException
738	* Purpose : log the exception to win32os2.log
739	* Parameters: ...
740	* Variables :
741	* Result :
742	* Remark :
743	* Status :
744	*
745	* Author : Patrick Haller [Tue, 1999/07/01 09:00]
746	*****************************************************************************/
747
748	static void dprintfException(PEXCEPTIONREPORTRECORD pERepRec,
749	PEXCEPTIONREGISTRATIONRECORD pERegRec,
750	PCONTEXTRECORD pCtxRec,
751	PVOID p)
752	{
753	PSZ pszExceptionName = "<unknown>"; /* points to name/type excpt */
754	char szData[128]; /* local storage for excpt dep. information */
755	char szData2[128]; /* local storage for excpt dep. information */
756	APIRET rc = XCPT_CONTINUE_SEARCH; /* excpt-dep. code */
757	BOOL fExcptSoftware = FALSE; /* software/hardware gen. exceptn */
758	BOOL fExcptFatal = TRUE; /* fatal exception ? */
759	BOOL fExcptPortable = TRUE; /* portability of exception */
760	PPIB pPIB; /* process information block */
761	PTIB pTIB; /* thread information block */
762	ULONG ulModule; /* module number */
763	ULONG ulObject; /* object number within the module */
764	CHAR szModule[260]; /* buffer for the module name */
765	ULONG ulOffset; /* offset within the object within the module */
766
767	szData[0] = 0; /* initialize */
768	szData2[0] = 0; /* initialize */
769	switch(pERepRec->ExceptionNum) /* take according action */
770	{
771	/* portable, non-fatal software-generated exceptions */
772	case XCPT_GUARD_PAGE_VIOLATION:
773	pszExceptionName = "Guard Page Violation";
774	sprintf(szData,
775	"R/W %08xh at %08xh.",
776	pERepRec->ExceptionInfo[0],
777	pERepRec->ExceptionInfo[1]);
778	fExcptSoftware = TRUE;
779	fExcptFatal = FALSE;
780	rc = XCPT_CONTINUE_EXECUTION;
781	break;
782
783	case XCPT_UNABLE_TO_GROW_STACK:
784	pszExceptionName = "Unable To Grow Stack";
785	fExcptSoftware = TRUE;
786	fExcptFatal = FALSE;
787	rc = XCPT_CONTINUE_EXECUTION;
788	break;
789
790	/* portable, fatal, hardware-generated exceptions */
791	case XCPT_ACCESS_VIOLATION:
792	pszExceptionName = "Access Violation";
793	/* sprintf (szData, "Access type %08x at %08x.", pERepRec->ExceptionInfo[0],
794	pERepRec->ExceptionInfo[1]); */
795	switch (pERepRec->ExceptionInfo[0])
796	{
797	case XCPT_READ_ACCESS:
798	sprintf (szData,
799	"Read Access at address %08xh",
800	pERepRec->ExceptionInfo[1]);
801	break;
802
803	case XCPT_WRITE_ACCESS:
804	sprintf (szData,
805	"Write Access at address %08x",
806	pERepRec->ExceptionInfo[1]);
807	break;
808
809	case XCPT_SPACE_ACCESS:
810	sprintf (szData,
811	"Space Access at selector %08x",
812	pERepRec->ExceptionInfo[1]);
813	break;
814
815	case XCPT_LIMIT_ACCESS:
816	strcpy (szData,
817	"Limit Access");
818	break;
819
820	case XCPT_UNKNOWN_ACCESS:
821	strcpy (szData,
822	"Unknown Access");
823	break;
824
825	default:
826	strcpy (szData,
827	"(Invalid Access Code)");
828	break;
829	}
830	break;
831
832	case XCPT_INTEGER_DIVIDE_BY_ZERO:
833	pszExceptionName = "Division By Zero (Integer)";
834	break;
835
836	case XCPT_FLOAT_DIVIDE_BY_ZERO:
837	pszExceptionName = "Division By Zero (Float)";
838	break;
839
840	case XCPT_FLOAT_INVALID_OPERATION:
841	pszExceptionName = "Invalid Floating Point Operation";
842	break;
843
844	case XCPT_ILLEGAL_INSTRUCTION:
845	pszExceptionName = "Illegal Instruction";
846	break;
847
848	case XCPT_PRIVILEGED_INSTRUCTION:
849	pszExceptionName = "Privileged Instruction";
850	break;
851
852	case XCPT_INTEGER_OVERFLOW:
853	pszExceptionName = "Integer Overflow";
854	break;
855
856	case XCPT_FLOAT_OVERFLOW:
857	pszExceptionName = "Floating Point Overflow";
858	break;
859
860	case XCPT_FLOAT_UNDERFLOW:
861	pszExceptionName = "Floating Point Underflow";
862	break;
863
864	case XCPT_FLOAT_DENORMAL_OPERAND:
865	pszExceptionName = "Floating Point Denormal Operand";
866	break;
867
868	case XCPT_FLOAT_INEXACT_RESULT:
869	pszExceptionName = "Floating Point Inexact Result";
870	break;
871
872	case XCPT_FLOAT_STACK_CHECK:
873	pszExceptionName = "Floating Point Stack Check";
874	break;
875
876	case XCPT_DATATYPE_MISALIGNMENT:
877	pszExceptionName = "Datatype Misalignment";
878	sprintf(szData,
879	"R/W %08x alignment %08x at %08x.",
880	pERepRec->ExceptionInfo[0],
881	pERepRec->ExceptionInfo[1],
882	pERepRec->ExceptionInfo[2]);
883	break;
884
885	case XCPT_BREAKPOINT:
886	pszExceptionName = "Breakpoint (don't debug me! :)";
887	break;
888
889	case XCPT_SINGLE_STEP:
890	pszExceptionName = "Single Step (don't debug me! :)";
891	break;
892
893	/* portable, fatal, software-generated exceptions */
894	case XCPT_IN_PAGE_ERROR:
895	pszExceptionName = "In Page Error";
896	sprintf(szData,
897	"at %08x.",
898	pERepRec->ExceptionInfo[0]);
899	fExcptSoftware = TRUE;
900	break;
901
902	case XCPT_PROCESS_TERMINATE:
903	pszExceptionName = "Process Termination";
904	fExcptSoftware = TRUE;
905	break;
906
907	case XCPT_ASYNC_PROCESS_TERMINATE:
908	pszExceptionName = "Process Termination (async)";
909	sprintf(szData,
910	"terminating thread TID=%u",
911	pERepRec->ExceptionInfo[0]);
912	fExcptSoftware = TRUE;
913	break;
914
915	case XCPT_NONCONTINUABLE_EXCEPTION:
916	pszExceptionName = "Noncontinuable Exception";
917	fExcptSoftware = TRUE;
918	break;
919
920	case XCPT_INVALID_DISPOSITION:
921	pszExceptionName = "Invalid Disposition";
922	fExcptSoftware = TRUE;
923	break;
924
925	/* non-portable, fatal exceptions */
926	case XCPT_INVALID_LOCK_SEQUENCE:
927	pszExceptionName = "Invalid Lock Sequence";
928	fExcptSoftware = TRUE;
929	fExcptPortable = FALSE;
930	break;
931
932	case XCPT_ARRAY_BOUNDS_EXCEEDED:
933	pszExceptionName = "Array Bounds Exceeded";
934	fExcptSoftware = TRUE;
935	fExcptPortable = FALSE;
936	break;
937
938	/* unwind operation exceptions */
939	case XCPT_UNWIND:
940	pszExceptionName = "Unwind Exception";
941	fExcptSoftware = TRUE;
942	fExcptPortable = FALSE;
943	break;
944
945	case XCPT_BAD_STACK:
946	pszExceptionName = "Unwind Exception, Bad Stack";
947	fExcptSoftware = TRUE;
948	fExcptPortable = FALSE;
949	break;
950
951	case XCPT_INVALID_UNWIND_TARGET:
952	pszExceptionName = "Unwind Exception, Invalid Target";
953	fExcptSoftware = TRUE;
954	fExcptPortable = FALSE;
955	break;
956
957	/* fatal signal exceptions */
958	case XCPT_SIGNAL:
959	pszExceptionName = "Signal";
960	sprintf(szData,
961	"Signal Number = %08x",
962	pERepRec->ExceptionInfo[0]);
963	fExcptSoftware = TRUE;
964	fExcptPortable = FALSE;
965
966	switch (pERepRec->ExceptionInfo[0]) /* resolve signal information */
967	{
968	case XCPT_SIGNAL_INTR:
969	pszExceptionName = "Signal (Interrupt)";
970	break;
971
972	case XCPT_SIGNAL_KILLPROC:
973	pszExceptionName = "Signal (Kill Process)";
974	break;
975
976	case XCPT_SIGNAL_BREAK:
977	pszExceptionName = "Signal (Break)";
978	break;
979	}
980	break;
981
982	default:
983	pszExceptionName = "(unknown exception code)";
984	sprintf(szData,
985	"Exception Code = %08x",
986	pERepRec->ExceptionNum);
987	}
988
989
990	/* now dump the information to the logfile */
991	dprintf(("---[Exception Information]------------\n"));
992	sprintf(szData2,
993	" %s (",
994	pszExceptionName);
995
996	if (fExcptSoftware == TRUE) /* software or hardware generated ? */
997	strcat (szData2, "software generated,");
998	else
999	strcat (szData2, "hardware generated,");
1000
1001	if (fExcptPortable == TRUE) /* portable exception ? */
1002	strcat (szData2, "portable,");
1003	else
1004	strcat (szData2, "non-portable,");
1005
1006	if (fExcptFatal == TRUE) /* fatal exception ? */
1007	strcat (szData2, "fatal");
1008	else
1009	strcat (szData2, "non-fatal");
1010
1011	strcat (szData2, /* add trailing brace */
1012	")\n");
1013
1014
1015	dprintf((szData2));
1016
1017	if (szData[0] != 0) /* see if there is an additional entry */
1018	dprintf((" %s\n",
1019	szData));
1020
1021	rc = DosQueryModFromEIP(&ulModule,
1022	&ulObject,
1023	sizeof(szModule),
1024	szModule,
1025	&ulOffset,
1026	(ULONG)pERepRec->ExceptionAddress);
1027
1028	dprintf((" Exception Address = %08x ",
1029	pERepRec->ExceptionAddress));
1030
1031	if(rc == NO_ERROR && ulObject != -1)
1032	dprintf(("<%s> (#%u), obj #%u:%08x\n",
1033	szModule,
1034	ulModule,
1035	ulObject,
1036	ulOffset));
1037	else
1038	dprintf(("<win32 app>\n"));
1039
1040
1041	rc = DosGetInfoBlocks (&pTIB, /* query kernel information blocks */
1042	&pPIB);
1043	if (rc == NO_ERROR)
1044	{
1045	dprintf((" Thread: Ordinal TID: %u, TID: %u, Priority: %04xh\n",
1046	pTIB->tib_ordinal,
1047	pTIB->tib_ptib2->tib2_ultid,
1048	pTIB->tib_ptib2->tib2_ulpri));
1049
1050	dprintf((" Process: PID: %u, Parent: %u, Status: %u\n",
1051	pPIB->pib_ulpid,
1052	pPIB->pib_ulppid,
1053	pPIB->pib_flstatus));
1054	}
1055
1056	if (pCtxRec->ContextFlags & CONTEXT_CONTROL) /* check flags */
1057	dprintf((" SS:ESP=%04x:%08x EFLAGS=%08x\n",
1058	pCtxRec->ctx_SegSs,
1059	pCtxRec->ctx_RegEsp,
1060	pCtxRec->ctx_EFlags));
1061	dprintf((" CS:EIP=%04x:%08x EBP =%08x\n",
1062	pCtxRec->ctx_SegCs,
1063	pCtxRec->ctx_RegEip,
1064	pCtxRec->ctx_RegEbp));
1065
1066	if (pCtxRec->ContextFlags & CONTEXT_INTEGER) /* check flags */
1067	dprintf((" EAX=%08x EBX=%08x ESI=%08x\n",
1068	pCtxRec->ctx_RegEax,
1069	pCtxRec->ctx_RegEbx,
1070	pCtxRec->ctx_RegEsi));
1071	dprintf((" ECX=%08x EDX=%08x EDI=%08x\n",
1072	pCtxRec->ctx_RegEcx,
1073	pCtxRec->ctx_RegEdx,
1074	pCtxRec->ctx_RegEdi));
1075
1076	if (pCtxRec->ContextFlags & CONTEXT_SEGMENTS) /* check flags */
1077	dprintf((" DS=%04x ES=%08x",
1078	pCtxRec->ctx_SegDs,
1079	pCtxRec->ctx_SegEs));
1080	dprintf((" FS=%04x GS=%04x\n",
1081	pCtxRec->ctx_SegFs,
1082	pCtxRec->ctx_SegGs));
1083
1084	if (pCtxRec->ContextFlags & CONTEXT_FLOATING_POINT) /* check flags */
1085	{
1086	ULONG ulCounter; /* temporary local counter for fp stack */
1087
1088	dprintf((" Env[0]=%08x Env[1]=%08x Env[2]=%08x Env[3]=%08x\n",
1089	pCtxRec->ctx_env[0],
1090	pCtxRec->ctx_env[1],
1091	pCtxRec->ctx_env[2],
1092	pCtxRec->ctx_env[3]));
1093
1094	dprintf((" Env[4]=%08x Env[5]=%08x Env[6]=%08x\n",
1095	pCtxRec->ctx_env[4],
1096	pCtxRec->ctx_env[5],
1097	pCtxRec->ctx_env[6]));
1098
1099	for (ulCounter = 0;
1100	ulCounter < 8; /* see TOOLKIT\INCLUDE\BSEEXPT.H, _CONTEXT structure */
1101	ulCounter ++)
1102	dprintf((" FP-Stack[%u] losig=%08x hisig=%08x signexp=%04x\n",
1103	ulCounter,
1104	pCtxRec->ctx_stack[0].losig,
1105	pCtxRec->ctx_stack[0].hisig,
1106	pCtxRec->ctx_stack[0].signexp));
1107	}
1108
1109	dprintf(("---[End Of Exception Information]-----\n"));
1110	}
1111
1112	/*****************************************************************************
1113	* Name : ERR _System OS2ExceptionHandler
1114	* Purpose :
1115	* Parameters: ...
1116	* Variables :
1117	* Result :
1118	* Remark :
1119	* Status :
1120	*
1121	* Author : Patrick Haller [Tue, 1999/07/01 09:00]
1122	*****************************************************************************/
1123	/* from PPC DDK */
1124	#ifndef XCPT_CONTINUE_STOP
1125	#define XCPT_CONTINUE_STOP 0x00716668
1126	#endif
1127
1128	ULONG APIENTRY OS2ExceptionHandler(PEXCEPTIONREPORTRECORD pERepRec,
1129	PEXCEPTIONREGISTRATIONRECORD pERegRec,
1130	PCONTEXTRECORD pCtxRec,
1131	PVOID p)
1132	{
1133	//SvL: Check if exception inside debug fprintf -> if so, clear lock so
1134	// next dprintf won't wait forever
1135	int prevlock = LogException(ENTER_EXCEPTION);
1136
1137	/* Access violation at a known location */
1138	switch(pERepRec->ExceptionNum)
1139	{
1140	case XCPT_FLOAT_DENORMAL_OPERAND:
1141	case XCPT_FLOAT_DIVIDE_BY_ZERO:
1142	case XCPT_FLOAT_INEXACT_RESULT:
1143	// case XCPT_FLOAT_INVALID_OPERATION:
1144	case XCPT_FLOAT_OVERFLOW:
1145	case XCPT_FLOAT_STACK_CHECK:
1146	case XCPT_FLOAT_UNDERFLOW:
1147	dprintfException(pERepRec, pERegRec, pCtxRec, p);
1148	dprintf(("KERNEL32: OS2ExceptionHandler: FPU exception\n"));
1149	if(!fIsOS2Image && !fExitProcess) //Only for real win32 apps
1150	{
1151	if(OSLibDispatchException(pERepRec, pERegRec, pCtxRec, p) == FALSE)
1152	{
1153	pCtxRec->ctx_env[0] \|= 0x1F;
1154	pCtxRec->ctx_stack[0].losig = 0;
1155	pCtxRec->ctx_stack[0].hisig = 0;
1156	pCtxRec->ctx_stack[0].signexp = 0;
1157	}
1158	dprintf(("KERNEL32: OS2ExceptionHandler: fix and continue\n"));
1159	goto continueexecution;
1160	}
1161	else
1162	{
1163	dprintf(("KERNEL32: OS2ExceptionHandler: continue search\n"));
1164	goto continuesearch;
1165	}
1166
1167	case XCPT_PROCESS_TERMINATE:
1168	case XCPT_ASYNC_PROCESS_TERMINATE:
1169	//// dprintfException(pERepRec, pERegRec, pCtxRec, p);
1170	SetExceptionChain((ULONG)-1);
1171	goto continuesearch;
1172
1173	case XCPT_ACCESS_VIOLATION:
1174	{
1175	Win32MemMap *map;
1176	BOOL fWriteAccess = FALSE;
1177	ULONG offset, accessflag;
1178
1179	#ifdef WITH_KLIB
1180	if ( pERepRec->ExceptionInfo[0] == XCPT_READ_ACCESS
1181	\|\| pERepRec->ExceptionInfo[0] == XCPT_WRITE_ACCESS
1182	\|\| pERepRec->ExceptionInfo[0] == XCPT_EXECUTE_ACCESS
1183	\|\| pERepRec->ExceptionInfo[0] == XCPT_UNKNOWN_ACCESS
1184	)
1185	{
1186	ENMACCESS enmAccess = enmRead;
1187	switch (pERepRec->ExceptionInfo[0])
1188	{
1189	case XCPT_WRITE_ACCESS: enmAccess = enmWrite; break;
1190	case XCPT_UNKNOWN_ACCESS: enmAccess = enmUnknown; break;
1191	}
1192
1193	if (kHeapDbgException((void*)pERepRec->ExceptionInfo[1],
1194	enmAccess,
1195	pERepRec->ExceptionAddress,
1196	pERepRec))
1197	goto continueexecution;
1198	}
1199	#endif
1200
1201	if(pERepRec->ExceptionInfo[1] == 0 && pERepRec->ExceptionInfo[1] == XCPT_DATA_UNKNOWN) {
1202	goto continueFail;
1203	}
1204
1205	//------------->>> WARNING: potentially dangerous workaround!!
1206	/* Some apps set ES = FS and Odin doesn't like that! */
1207	/* Note: maybe we could even check for ES != DS? But maybe */
1208	/* that might cause more harm than good... */
1209	if (pCtxRec->ContextFlags & CONTEXT_SEGMENTS)
1210	if (pCtxRec->ctx_SegEs == pCtxRec->ctx_SegFs) {
1211	/* Let's just reset ES to the DS value and hope it's okay */
1212	pCtxRec->ctx_SegEs = pCtxRec->ctx_SegDs;
1213	goto continueexecution;
1214	}
1215
1216	switch(pERepRec->ExceptionInfo[0]) {
1217	case XCPT_READ_ACCESS:
1218	accessflag = MEMMAP_ACCESS_READ;
1219	break;
1220	case XCPT_WRITE_ACCESS:
1221	accessflag = MEMMAP_ACCESS_WRITE;
1222	fWriteAccess = TRUE;
1223	break;
1224	case XCPT_EXECUTE_ACCESS:
1225	accessflag = MEMMAP_ACCESS_EXECUTE;
1226	break;
1227	default:
1228	goto continueFail;
1229	}
1230
1231	map = Win32MemMapView::findMapByView(pERepRec->ExceptionInfo[1], &offset, accessflag);
1232	if(map == NULL) {
1233	goto continueFail;
1234	}
1235	if(map->commitPage(offset, fWriteAccess) == TRUE)
1236	goto continueexecution;
1237
1238	//no break;
1239	}
1240	continueFail:
1241
1242	////#define DEBUGSTACK
1243	#ifdef DEBUGSTACK
1244	if(pCtxRec->ContextFlags & CONTEXT_CONTROL) {
1245	ULONG *stackptr;
1246	APIRET rc;
1247	int i;
1248	ULONG ulOffset, ulModule, ulObject;
1249	CHAR szModule[CCHMAXPATH];
1250
1251	stackptr = (ULONG *)pCtxRec->ctx_RegEsp;
1252	dprintf(("Stack DUMP:"));
1253	for(i=0;i<16;i++) {
1254	rc = DosQueryModFromEIP(&ulModule,
1255	&ulObject,
1256	sizeof(szModule),
1257	szModule,
1258	&ulOffset,
1259	(ULONG)*stackptr);
1260
1261	if (rc == NO_ERROR)
1262	dprintf(("0x%8x: 0x%8x %s (#%u), obj #%u:%08x", stackptr, *stackptr, szModule, ulModule, ulObject, ulOffset));
1263	else dprintf(("0x%8x: 0x%8x", stackptr, *stackptr));
1264	stackptr++;
1265	}
1266	dprintf(("Stack DUMP END"));
1267	}
1268	#endif
1269
1270	case XCPT_BREAKPOINT:
1271	case XCPT_ARRAY_BOUNDS_EXCEEDED:
1272	case XCPT_DATATYPE_MISALIGNMENT:
1273	case XCPT_ILLEGAL_INSTRUCTION:
1274	case XCPT_PRIVILEGED_INSTRUCTION:
1275	case XCPT_INVALID_LOCK_SEQUENCE:
1276	case XCPT_INTEGER_DIVIDE_BY_ZERO:
1277	case XCPT_INTEGER_OVERFLOW:
1278	case XCPT_SINGLE_STEP:
1279	case XCPT_UNABLE_TO_GROW_STACK:
1280	case XCPT_IN_PAGE_ERROR:
1281	CrashAndBurn:
1282	//SvL: TODO: this may not always be the right thing to do
1283	//MN: If EH_NESTED_CALL is set, an exception occurred during the execution
1284	// of this exception handler. We better bail out ASAP or we'll likely
1285	// recurse infinitely until we run out of stack space!!
1286	if (pERepRec->fHandlerFlags & EH_NESTED_CALL)
1287	goto continuesearch;
1288
1289	#ifdef DEBUG
1290	dprintfException(pERepRec, pERegRec, pCtxRec, p);
1291	if(pCtxRec->ContextFlags & CONTEXT_CONTROL) {
1292	dbgPrintStack(pERepRec, pERegRec, pCtxRec, p);
1293	}
1294	#endif
1295	if(!fIsOS2Image && !fExitProcess) //Only for real win32 apps
1296	{
1297	if(OSLibDispatchException(pERepRec, pERegRec, pCtxRec, p) == TRUE)
1298	{
1299	goto continueexecution;
1300	}
1301	}
1302	else goto continuesearch; //pass on to OS/2 RTL or app exception handler
1303
1304	dprintf(("KERNEL32: OS2ExceptionHandler: Continue and kill\n"));
1305	pCtxRec->ctx_RegEip = (ULONG)KillWin32Process;
1306	pCtxRec->ctx_RegEsp = pCtxRec->ctx_RegEsp + 0x10;
1307	pCtxRec->ctx_RegEax = pERepRec->ExceptionNum;
1308	pCtxRec->ctx_RegEbx = pCtxRec->ctx_RegEip;
1309	goto continueexecution;
1310
1311	//@@@PH: growing thread stacks might need special treatment
1312	case XCPT_GUARD_PAGE_VIOLATION:
1313	//SvL: don't print anything here -> fatal hang if happens inside fprintf
1314	//dprintf(("KERNEL32: OS2ExceptionHandler: trying to grow stack (continue search)"));
1315	goto continuesearch;
1316
1317	case XCPT_SIGNAL:
1318	if(pERepRec->ExceptionInfo[0] == XCPT_SIGNAL_KILLPROC) /* resolve signal information */
1319	{
1320	SetExceptionChain((ULONG)-1);
1321	goto continuesearch;
1322	}
1323	goto CrashAndBurn;
1324
1325	default: //non-continuable exceptions
1326	dprintfException(pERepRec, pERegRec, pCtxRec, p);
1327	goto continuesearch;
1328	}
1329	continuesearch:
1330	LogException(LEAVE_EXCEPTION, prevlock);
1331	return XCPT_CONTINUE_SEARCH;
1332
1333	continueexecution:
1334	LogException(LEAVE_EXCEPTION, prevlock);
1335	return XCPT_CONTINUE_EXECUTION;
1336	}
1337
1338	/*****************************************************************************
1339	* Name : void OS2SetExceptionHandler
1340	* Purpose : Sets the main thread exception handler in FS:[0] (original OS/2 FS selector)
1341	* Parameters: exceptframe: pointer to exception handler frame on stack (2 ULONGs)
1342	* Variables :
1343	* Result :
1344	* Remark :
1345	* Status :
1346	*
1347	* Author : Sander van Leeuwen [Sun, 1999/08/21 12:16]
1348	*****************************************************************************/
1349	void OS2SetExceptionHandler(void *exceptframe)
1350	{
1351	PEXCEPTIONREGISTRATIONRECORD pExceptRec = (PEXCEPTIONREGISTRATIONRECORD)exceptframe;
1352
1353	pExceptRec->prev_structure = (PEXCEPTIONREGISTRATIONRECORD)0;
1354	pExceptRec->ExceptionHandler = OS2ExceptionHandler;
1355
1356	/* disable trap popups */
1357	// DosError(FERR_DISABLEEXCEPTION \| FERR_DISABLEHARDERR);
1358
1359	DosSetExceptionHandler(pExceptRec);
1360	dprintf(("OS2SetExceptionHandler: exception chain %x", pExceptRec));
1361	#ifdef DEBUG_ENABLELOG_LEVEL2
1362	PrintExceptionChain();
1363	#endif
1364	}
1365
1366	#ifdef DEBUG
1367	void PrintExceptionChain()
1368	{
1369	USHORT sel = RestoreOS2FS();
1370	PEXCEPTIONREGISTRATIONRECORD pExceptRec = (PEXCEPTIONREGISTRATIONRECORD)QueryExceptionChain();
1371
1372	dprintf(("Exception chain list:"));
1373	while(pExceptRec != 0 && (ULONG)pExceptRec != -1) {
1374	dprintf(("record %x", pExceptRec));
1375	pExceptRec = pExceptRec->prev_structure;
1376	}
1377	SetFS(sel);
1378	}
1379
1380	void PrintWin32ExceptionChain(PWINEXCEPTION_FRAME pframe)
1381	{
1382	dprintf(("Win32 exception chain:"));
1383	while ((pframe != NULL) && ((ULONG)pframe != 0xFFFFFFFF)) {
1384	dprintf(("Record at %08X, Prev at %08X, handler at %08X", pframe, pframe->Prev, pframe->Handler));
1385	if (pframe == pframe->Prev) {
1386	dprintf(("Chain corrupted! Record at %08X pointing to itself!", pframe));
1387	break;
1388	}
1389	pframe = pframe->Prev;
1390	}
1391	}
1392
1393	#endif
1394
1395
1396	/*****************************************************************************
1397	* Name : void OS2UnsetExceptionHandler
1398	* Purpose : Removes the main thread exception handler in FS:[0] (original OS/2 FS selector)
1399	* Parameters: exceptframe: pointer to exception handler frame on stack (2 ULONGs)
1400	* Variables :
1401	* Result :
1402	* Remark :
1403	* Status :
1404	*
1405	* Author : Sander van Leeuwen [Sun, 1999/08/21 12:16]
1406	*****************************************************************************/
1407	void OS2UnsetExceptionHandler(void *exceptframe)
1408	{
1409	PEXCEPTIONREGISTRATIONRECORD pExceptRec = (PEXCEPTIONREGISTRATIONRECORD)exceptframe;
1410
1411	DosUnsetExceptionHandler(pExceptRec);
1412	dprintf(("OS2UnsetExceptionHandler: exception chain %x", pExceptRec));
1413	#ifdef DEBUG_ENABLELOG_LEVEL2
1414	PrintExceptionChain();
1415	#endif
1416	}
1417
1418	void SetOS2ExceptionChain(ULONG val)
1419	{
1420	USHORT sel = GetFS();
1421
1422	SetExceptionChain(val);
1423	SetFS(sel);
1424	}
1425
1426	int _System CheckCurFS()
1427	{
1428	USHORT sel = RestoreOS2FS();
1429	PEXCEPTIONREGISTRATIONRECORD pExceptRec;
1430
1431	if(sel == 0x150b) {
1432	SetFS(sel);
1433	return FALSE;
1434	}
1435	pExceptRec = (PEXCEPTIONREGISTRATIONRECORD)QueryExceptionChain();
1436	if(pExceptRec->ExceptionHandler != OS2ExceptionHandler) {
1437	SetFS(sel);
1438	return FALSE;
1439	}
1440	SetFS(sel);
1441	return TRUE;
1442	}
1443

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