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source: trunk/src/kernel32/exceptions.cpp@ 3160

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Last change on this file since 3160 was 3160, checked in by sandervl, 25 years ago
added extra check for fs corruption during dll attach
File size: 36.7 KB

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1	/* $Id: exceptions.cpp,v 1.37 2000-03-18 19:49:43 sandervl Exp $ */
2
3	/*
4	* Win32 Device IOCTL API 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 <builtin.h>
61	#include "exceptions.h"
62	#include "exceptutil.h"
63	#include <misc.h>
64	#include "mmap.h"
65	#include <wprocess.h>
66	#include "oslibexcept.h"
67
68	#define DBG_LOCALLOG DBG_exceptions
69	#include "dbglocal.h"
70
71	//Global Process Unhandled exception filter
72	static LPTOP_LEVEL_EXCEPTION_FILTER CurrentUnhExceptionFlt = NULL;
73	static UINT CurrentErrorMode = SEM_FAILCRITICALERRORS;
74	static PEXCEPTION_HANDLER StartupCodeHandler = NULL;
75
76	extern "C" PWINEXCEPTION_FRAME GetExceptionRecord(ULONG offset, ULONG segment);
77
78	LONG WIN32API UnhandledExceptionFilter(PWINEXCEPTION_POINTERS lpexpExceptionInfo);
79	void KillWin32Process(void);
80
81
82	/*****************************************************************************
83	* Name : UINT SetErrorMode
84	* Purpose :
85	* Parameters: UINT fuErrorMode
86	* Variables :
87	* Result :
88	* Remark :
89	* Status :
90	*
91	* Author : Sander van Leeuwen [Tue, 1999/07/01 09:00]
92	*****************************************************************************/
93
94	UINT WIN32API SetErrorMode(UINT fuErrorMode)
95	{
96	UINT oldmode = CurrentErrorMode;
97
98	dprintf(("KERNEL32: SetErrorMode(%08xh)\n",
99	fuErrorMode));
100	CurrentErrorMode = fuErrorMode;
101
102	if(fuErrorMode & SEM_FAILCRITICALERRORS \|\| fuErrorMode & SEM_NOOPENFILEERRORBOX)
103	DosError(FERR_DISABLEHARDERR);
104	else
105	DosError(FERR_ENABLEHARDERR);
106
107	// SEM_NOGPFAULTERRORBOX and SEM_NOALIGNMENTFAULTEXCEPT --> UnhandledExceptionFilter()
108
109	return(oldmode);
110	}
111
112	/*****************************************************************************
113	* Name : VOID _Pascal OS2RaiseException
114	* Purpose : Unwinds exception handlers (heavily influenced by Wine)
115	* Parameters: ...
116	* Variables :
117	* Result :
118	* Remark :
119	* Status :
120	*
121	* Author : Sander van Leeuwen [Tue, 1999/07/01 09:00]
122	*****************************************************************************/
123
124	void WIN32API RtlRaiseException(WINEXCEPTION_RECORD rec, WINCONTEXT context);
125
126	VOID _Pascal OS2RaiseException(DWORD dwExceptionCode,
127	DWORD dwExceptionFlags,
128	DWORD cArguments,
129	DWORD *lpArguments,
130	DWORD eip, DWORD esp, DWORD ebp, DWORD flags,
131	DWORD eax, DWORD ebx, DWORD ecx, DWORD edx,
132	DWORD edi, DWORD esi, DWORD cs, DWORD ds,
133	DWORD es, DWORD fs, DWORD gs, DWORD ss)
134	{
135	WINEXCEPTION_RECORD record;
136	WINEXCEPTION_POINTERS ExceptionInfo;
137	WINCONTEXT context;
138	int rc;
139	int i;
140
141	dprintf(("KERNEL32: RaiseException(%08xh)\n",
142	dwExceptionCode));
143
144	/* compose an exception record */
145	record.ExceptionCode = dwExceptionCode;
146	record.ExceptionFlags = dwExceptionFlags;
147	record.ExceptionRecord = NULL;
148	record.NumberParameters = cArguments;
149	record.ExceptionAddress = (LPVOID)eip;
150
151	memset(&context, 0, sizeof(context));
152	context.ContextFlags = WINCONTEXT_FULL; //segments, integer, control
153	context.SegGs = gs;
154	context.SegFs = fs;
155	context.SegEs = es;
156	context.SegDs = ds;
157	context.Edi = edi;
158	context.Esi = esi;
159	context.Ebx = ebx;
160	context.Edx = edx;
161	context.Ecx = ecx;
162	context.Eax = eax;
163	context.Ebp = ebp;
164	context.Eip = eip;
165	context.SegCs = cs;
166	context.EFlags = flags;
167	context.Esp = esp;
168	context.SegSs = ss;
169
170	if(lpArguments)
171	{
172	for(i=0;
173	i<cArguments;
174	i++)
175	record.ExceptionInformation[i] = lpArguments[i];
176	}
177
178	rc = RtlDispatchException(&record, &context);
179
180	// and finally, the unhandled exception filter
181	if(rc == ExceptionContinueSearch && UnhandledExceptionFilter != NULL)
182	{
183	ExceptionInfo.ExceptionRecord = &record;
184	ExceptionInfo.ContextRecord = &context;
185
186	rc = UnhandledExceptionFilter(&ExceptionInfo);
187	}
188
189	// terminate the process
190	if(rc != ExceptionContinueExecution \|\|
191	record.ExceptionFlags & EH_NONCONTINUABLE)
192	{
193	dprintf(("KERNEL32: RaiseException terminating process.\n"));
194	DosExit(EXIT_PROCESS, 0);
195	}
196
197	return;
198	}
199	//******************************************************************************
200	//******************************************************************************
201	DWORD RtlDispatchException(WINEXCEPTION_RECORD pRecord, WINCONTEXT pContext)
202	{
203	PWINEXCEPTION_FRAME pframe, dispatch, nested_frame;
204	int rc;
205
206	// get chain of exception frames
207	rc = ExceptionContinueSearch;
208
209	nested_frame = NULL;
210	TEB *winteb = GetThreadTEB();
211	pframe = (PWINEXCEPTION_FRAME)winteb->except;
212
213	// walk the exception chain
214	while( (pframe != NULL) && (pframe != ((void *)0xFFFFFFFF)) )
215	{
216	dispatch=0;
217
218	dprintf(("Calling exception handler %x", pframe->Handler));
219	/* Check frame address */
220	if (((void*)pframe < winteb->stack_low) \|\|
221	((void*)(pframe+1) > winteb->stack_top) \|\|
222	(int)pframe & 3)
223	{
224	pRecord->ExceptionFlags \|= EH_STACK_INVALID;
225	break;
226	}
227
228	rc = pframe->Handler(pRecord,
229	pframe,
230	pContext,
231	dispatch);
232
233	if (pframe == nested_frame)
234	{
235	/* no longer nested */
236	nested_frame = NULL;
237	pRecord->ExceptionFlags &= ~EH_NESTED_CALL;
238	}
239
240	dprintf(("exception handler returned %x", rc));
241
242	switch(rc)
243	{
244	case ExceptionContinueExecution:
245	if (!(pRecord->ExceptionFlags & EH_NONCONTINUABLE)) return rc;
246	break;
247	case ExceptionContinueSearch:
248	break;
249	case ExceptionNestedException:
250	if (nested_frame < dispatch) nested_frame = dispatch;
251	pRecord->ExceptionFlags \|= EH_NESTED_CALL;
252	break;
253	default:
254	break;
255	}
256
257	pframe = pframe->Prev;
258	}
259	return rc;
260	}
261	/*****************************************************************************
262	* Name : int _Pascal OS2RtlUnwind
263	* Purpose : Unwinds exception handlers (heavily influenced by Wine)
264	* Parameters: ...
265	* Variables :
266	* Result :
267	* Remark :
268	* Status :
269	*
270	* Author : Sander van Leeuwen [Tue, 1999/07/01 09:00]
271	*****************************************************************************/
272
273	int _Pascal OS2RtlUnwind(PWINEXCEPTION_FRAME pEndFrame,
274	LPVOID unusedEip,
275	PWINEXCEPTION_RECORD pRecord,
276	DWORD returnEax,
277	DWORD eip, DWORD esp, DWORD ebp, DWORD flags,
278	DWORD eax, DWORD ebx, DWORD ecx, DWORD edx,
279	DWORD edi, DWORD esi, DWORD cs, DWORD ds,
280	DWORD es, DWORD fs, DWORD gs, DWORD ss)
281	{
282	PWINEXCEPTION_FRAME frame, dispatch;
283	WINEXCEPTION_RECORD record, newrec;
284	WINCONTEXT context;
285	int rc;
286
287	dprintf(("KERNEL32: RtlUnwind %x %x\n", pEndFrame, pRecord));
288
289	memset(&context, 0, sizeof(context));
290	context.ContextFlags = WINCONTEXT_FULL; //segments, integer, control
291	context.SegGs = gs;
292	context.SegFs = fs;
293	context.SegEs = es;
294	context.SegDs = ds;
295	context.Edi = edi;
296	context.Esi = esi;
297	context.Ebx = ebx;
298	context.Edx = edx;
299	context.Ecx = ecx;
300	context.Eax = returnEax;
301	context.Ebp = ebp;
302	context.Eip = eip;
303	context.SegCs = cs;
304	context.EFlags = flags;
305	context.Esp = esp;
306	context.SegSs = ss;
307
308	/* build an exception record, if we do not have one */
309	if(!pRecord)
310	{
311	record.ExceptionCode = STATUS_INVALID_DISPOSITION;
312	record.ExceptionFlags = 0;
313	record.ExceptionRecord = NULL;
314	record.ExceptionAddress = (LPVOID)eip;
315	record.NumberParameters = 0;
316	pRecord = &record;
317	}
318
319	if(pEndFrame) pRecord->ExceptionFlags \|= EH_UNWINDING;
320	else pRecord->ExceptionFlags \|= EH_UNWINDING \| EH_EXIT_UNWIND;
321
322	/* get chain of exception frames */
323	TEB *winteb = GetThreadTEB();
324	frame = (PWINEXCEPTION_FRAME)winteb->except;
325
326	while ((frame != (PWINEXCEPTION_FRAME)0xffffffff) && (frame != pEndFrame))
327	{
328	/* Check frame address */
329	if (pEndFrame && (frame > pEndFrame))
330	{
331	newrec.ExceptionCode = STATUS_INVALID_UNWIND_TARGET;
332	newrec.ExceptionFlags = EH_NONCONTINUABLE;
333	newrec.ExceptionRecord = pRecord;
334	newrec.NumberParameters = 0;
335	dprintf(("KERNEL32: RtlUnwind terminating thread.\n"));
336	DosExit(EXIT_THREAD, 0);
337	}
338	if (((void*)frame < winteb->stack_low) \|\|
339	((void*)(frame+1) > winteb->stack_top) \|\|
340	(int)frame & 3)
341	{
342	newrec.ExceptionCode = STATUS_BAD_STACK;
343	newrec.ExceptionFlags = EH_NONCONTINUABLE;
344	newrec.ExceptionRecord = pRecord;
345	newrec.NumberParameters = 0;
346	dprintf(("KERNEL32: RtlUnwind terminating thread.\n"));
347	DosExit(EXIT_THREAD, 0);
348	}
349
350	/* Call handler */
351	dprintf(("Calling exception handler %x", frame->Handler));
352	switch(frame->Handler(pRecord, frame, &context, &dispatch ))
353	{
354	case ExceptionContinueSearch:
355	break;
356	case ExceptionCollidedUnwind:
357	frame = dispatch;
358	break;
359	default:
360	newrec.ExceptionCode = STATUS_INVALID_DISPOSITION;
361	newrec.ExceptionFlags = EH_NONCONTINUABLE;
362	newrec.ExceptionRecord = pRecord;
363	newrec.NumberParameters = 0;
364	dprintf(("KERNEL32: RtlUnwind terminating thread.\n"));
365	DosExit(EXIT_THREAD, 0);
366	break;
367	}
368	SetExceptionChain((DWORD)frame->Prev);
369	frame = frame->Prev;
370	}
371	return(0);
372	}
373
374
375	/*****************************************************************************
376	* Name : LONG WIN32API UnhandledExceptionFilter
377	* Purpose :
378	* Parameters: ...
379	* Variables :
380	* Result :
381	* Remark :
382	* Status :
383	*
384	* Author : Sander van Leeuwen [Tue, 1999/07/01 09:00]
385	*****************************************************************************/
386
387	LONG WIN32API UnhandledExceptionFilter(PWINEXCEPTION_POINTERS lpexpExceptionInfo)
388	{
389	char message[72];
390	DWORD rc;
391
392	// @@@PH: experimental change to have more control over exception handling
393	#pragma pack(4)
394	typedef struct
395	{
396	ULONG cb; /* Size of fixed part of structure */
397	HPOINTER hIcon; /* Icon handle */
398	ULONG cButtons; /* Number of buttons */
399	ULONG flStyle; /* Icon style flags (MB_ICONQUESTION, etc...)*/
400	HWND hwndNotify; /* Reserved */
401	MB2D mb2d[4]; /* Array of button definitions */
402	} myMB2INFO;
403	#pragma pack()
404
405	myMB2INFO mb2InfoExceptionBox = { 20, // size of structure
406	NULLHANDLE, // icon handle
407	4, // number of buttons
408	MB_ICONHAND, // icon style
409	NULLHANDLE, // reserved
410	{ {"continue ~search", 100, BS_PUSHBUTTON \| BS_TEXT \| BS_AUTOSIZE},
411	{"continue ~execution", 101, BS_PUSHBUTTON \| BS_TEXT \| BS_AUTOSIZE},
412	{"execute ~handler", 102, BS_PUSHBUTTON \| BS_TEXT \| BS_AUTOSIZE \| BS_DEFAULT},
413	{"~terminate process", 103, BS_PUSHBUTTON \| BS_TEXT \| BS_AUTOSIZE} }
414	};
415
416	dprintf(("KERNEL32: UnhandledExceptionFilter\n"));
417
418	if(CurrentUnhExceptionFlt && !(CurrentErrorMode & (SEM_FAILCRITICALERRORS \| SEM_NOGPFAULTERRORBOX)))
419	{
420	rc = CurrentUnhExceptionFlt(lpexpExceptionInfo);
421	if(rc != WINEXCEPTION_CONTINUE_SEARCH)
422	return rc;
423	}
424
425	sprintf(message,
426	"Unhandled exception 0x%08lx at address 0x%08lx.",
427	lpexpExceptionInfo->ExceptionRecord->ExceptionCode,
428	lpexpExceptionInfo->ExceptionRecord->ExceptionAddress);
429	/*
430	rc = WinMessageBox2(HWND_DESKTOP,
431	HWND_DESKTOP,
432	message,
433	"Oh, nooo!",
434	0,
435	(PMB2INFO)&mb2InfoExceptionBox);
436	switch (rc)
437	{
438	case 100:
439	return WINEXCEPTION_CONTINUE_SEARCH;
440
441	case 101:
442	return WINEXCEPTION_CONTINUE_EXECUTION;
443
444	case 102:
445	return WINEXCEPTION_EXECUTE_HANDLER;
446
447	case 103:
448	KillWin32Process();
449	// fall-through
450
451	default:
452	return WINEXCEPTION_EXECUTE_HANDLER;
453	}
454	*/
455	rc = WinMessageBox(HWND_DESKTOP,
456	HWND_DESKTOP,
457	message,
458	"Oh, nooo!",
459	0,
460	MB_ABORTRETRYIGNORE \| MB_ERROR);
461	switch (rc)
462	{
463	case MBID_IGNORE:
464	return WINEXCEPTION_CONTINUE_EXECUTION;
465
466	case MBID_ABORT:
467	KillWin32Process();
468	// fall-through
469
470	case MBID_RETRY:
471	default:
472	return WINEXCEPTION_EXECUTE_HANDLER;
473	}
474	}
475
476
477	/*****************************************************************************
478	* Name : LPTOP_LEVEL_EXCEPTION_FILTER WIN32API SetUnhandledExceptionFilter
479	* Purpose :
480	* Parameters: ...
481	* Variables :
482	* Result :
483	* Remark :
484	* Status :
485	*
486	* Author : Sander van Leeuwen [Tue, 1999/07/01 09:00]
487	*****************************************************************************/
488
489	LPTOP_LEVEL_EXCEPTION_FILTER WIN32API SetUnhandledExceptionFilter(LPTOP_LEVEL_EXCEPTION_FILTER lpTopLevelExceptionFilter)
490	{
491	LPTOP_LEVEL_EXCEPTION_FILTER old = CurrentUnhExceptionFlt;
492
493	dprintf(("KERNEL32: SetUnhandledExceptionFilter to %X\n",
494	lpTopLevelExceptionFilter));
495
496	CurrentUnhExceptionFlt = lpTopLevelExceptionFilter;
497
498	return(old);
499	}
500
501
502	/*****************************************************************************
503	* Name : KillWin32Process
504	* Purpose :
505	* Parameters: ...
506	* Variables :
507	* Result :
508	* Remark :
509	* Status :
510	*
511	* Author : Sander van Leeuwen [Tue, 1999/07/01 09:00]
512	*****************************************************************************/
513
514
515	//******************************************************************************
516	extern "C" ULONG getEAX();
517	extern "C" ULONG getEBX();
518	VOID WIN32API ExitProcess(DWORD exitcode);
519	//******************************************************************************
520	void KillWin32Process(void)
521	{
522	static BOOL fEntry = FALSE;
523
524	if(fEntry == FALSE) {
525	fEntry = TRUE;
526	ExitProcess(666);
527	return;
528	}
529	//Restore original OS/2 TIB selector
530	RestoreOS2FS();
531
532	SetExceptionChain((ULONG)-1);
533	DosExit(EXIT_PROCESS, 666);
534	}
535
536
537	//******************************************************************************
538	APIRET APIENTRY DosQueryModFromEIP (PULONG pulModule,
539	PULONG pulObject,
540	ULONG ulBufferLength,
541	PSZ pszBuffer,
542	PULONG pulOffset,
543	ULONG ulEIP);
544	//******************************************************************************
545
546
547	/*****************************************************************************
548	* Name : void static dprintfException
549	* Purpose : log the exception to win32os2.log
550	* Parameters: ...
551	* Variables :
552	* Result :
553	* Remark :
554	* Status :
555	*
556	* Author : Patrick Haller [Tue, 1999/07/01 09:00]
557	*****************************************************************************/
558
559	void static dprintfException(PEXCEPTIONREPORTRECORD pERepRec,
560	PEXCEPTIONREGISTRATIONRECORD pERegRec,
561	PCONTEXTRECORD pCtxRec,
562	PVOID p)
563	{
564	PSZ pszExceptionName = "<unknown>"; /* points to name/type excpt */
565	char szData[128]; /* local storage for excpt dep. information */
566	char szData2[128]; /* local storage for excpt dep. information */
567	APIRET rc = XCPT_CONTINUE_SEARCH; /* excpt-dep. code */
568	BOOL fExcptSoftware = FALSE; /* software/hardware gen. exceptn */
569	BOOL fExcptFatal = TRUE; /* fatal exception ? */
570	BOOL fExcptPortable = TRUE; /* portability of exception */
571	PPIB pPIB; /* process information block */
572	PTIB pTIB; /* thread information block */
573	ULONG ulModule; /* module number */
574	ULONG ulObject; /* object number within the module */
575	CHAR szModule[260]; /* buffer for the module name */
576	ULONG ulOffset; /* offset within the object within the module */
577
578	szData[0] = 0; /* initialize */
579	szData2[0] = 0; /* initialize */
580	switch(pERepRec->ExceptionNum) /* take according action */
581	{
582	/* portable, non-fatal software-generated exceptions */
583	case XCPT_GUARD_PAGE_VIOLATION:
584	pszExceptionName = "Guard Page Violation";
585	sprintf(szData,
586	"R/W %08xh at %08xh.",
587	pERepRec->ExceptionInfo[0],
588	pERepRec->ExceptionInfo[1]);
589	fExcptSoftware = TRUE;
590	fExcptFatal = FALSE;
591	rc = XCPT_CONTINUE_EXECUTION;
592	break;
593
594	case XCPT_UNABLE_TO_GROW_STACK:
595	pszExceptionName = "Unable To Grow Stack";
596	fExcptSoftware = TRUE;
597	fExcptFatal = FALSE;
598	rc = XCPT_CONTINUE_EXECUTION;
599	break;
600
601	/* portable, fatal, hardware-generated exceptions */
602	case XCPT_ACCESS_VIOLATION:
603	pszExceptionName = "Access Violation";
604	/* sprintf (szData, "Access type %08x at %08x.", pERepRec->ExceptionInfo[0],
605	pERepRec->ExceptionInfo[1]); */
606	switch (pERepRec->ExceptionInfo[0])
607	{
608	case XCPT_READ_ACCESS:
609	sprintf (szData,
610	"Read Access at address %08xh",
611	pERepRec->ExceptionInfo[1]);
612	break;
613
614	case XCPT_WRITE_ACCESS:
615	sprintf (szData,
616	"Write Access at address %08x",
617	pERepRec->ExceptionInfo[1]);
618	break;
619
620	case XCPT_SPACE_ACCESS:
621	sprintf (szData,
622	"Space Access at selector %08x",
623	pERepRec->ExceptionInfo[1]);
624	break;
625
626	case XCPT_LIMIT_ACCESS:
627	strcpy (szData,
628	"Limit Access");
629	break;
630
631	case XCPT_UNKNOWN_ACCESS:
632	strcpy (szData,
633	"Unknown Access");
634	break;
635
636	default:
637	strcpy (szData,
638	"(Invalid Access Code)");
639	break;
640	}
641	break;
642
643	case XCPT_INTEGER_DIVIDE_BY_ZERO:
644	pszExceptionName = "Division By Zero (Integer)";
645	break;
646
647	case XCPT_FLOAT_DIVIDE_BY_ZERO:
648	pszExceptionName = "Division By Zero (Float)";
649	break;
650
651	case XCPT_FLOAT_INVALID_OPERATION:
652	pszExceptionName = "Invalid Floating Point Operation";
653	break;
654
655	case XCPT_ILLEGAL_INSTRUCTION:
656	pszExceptionName = "Illegal Instruction";
657	break;
658
659	case XCPT_PRIVILEGED_INSTRUCTION:
660	pszExceptionName = "Privileged Instruction";
661	break;
662
663	case XCPT_INTEGER_OVERFLOW:
664	pszExceptionName = "Integer Overflow";
665	break;
666
667	case XCPT_FLOAT_OVERFLOW:
668	pszExceptionName = "Floating Point Overflow";
669	break;
670
671	case XCPT_FLOAT_UNDERFLOW:
672	pszExceptionName = "Floating Point Underflow";
673	break;
674
675	case XCPT_FLOAT_DENORMAL_OPERAND:
676	pszExceptionName = "Floating Point Denormal Operand";
677	break;
678
679	case XCPT_FLOAT_INEXACT_RESULT:
680	pszExceptionName = "Floating Point Inexact Result";
681	break;
682
683	case XCPT_FLOAT_STACK_CHECK:
684	pszExceptionName = "Floating Point Stack Check";
685	break;
686
687	case XCPT_DATATYPE_MISALIGNMENT:
688	pszExceptionName = "Datatype Misalignment";
689	sprintf(szData,
690	"R/W %08x alignment %08x at %08x.",
691	pERepRec->ExceptionInfo[0],
692	pERepRec->ExceptionInfo[1],
693	pERepRec->ExceptionInfo[2]);
694	break;
695
696	case XCPT_BREAKPOINT:
697	pszExceptionName = "Breakpoint (don't debug me! :)";
698	break;
699
700	case XCPT_SINGLE_STEP:
701	pszExceptionName = "Single Step (don't debug me! :)";
702	break;
703
704	/* portable, fatal, software-generated exceptions */
705	case XCPT_IN_PAGE_ERROR:
706	pszExceptionName = "In Page Error";
707	sprintf(szData,
708	"at %08x.",
709	pERepRec->ExceptionInfo[0]);
710	fExcptSoftware = TRUE;
711	break;
712
713	case XCPT_PROCESS_TERMINATE:
714	pszExceptionName = "Process Termination";
715	fExcptSoftware = TRUE;
716	break;
717
718	case XCPT_ASYNC_PROCESS_TERMINATE:
719	pszExceptionName = "Process Termination (async)";
720	sprintf(szData,
721	"terminating thread TID=%u",
722	pERepRec->ExceptionInfo[0]);
723	fExcptSoftware = TRUE;
724	break;
725
726	case XCPT_NONCONTINUABLE_EXCEPTION:
727	pszExceptionName = "Noncontinuable Exception";
728	fExcptSoftware = TRUE;
729	break;
730
731	case XCPT_INVALID_DISPOSITION:
732	pszExceptionName = "Invalid Disposition";
733	fExcptSoftware = TRUE;
734	break;
735
736	/* non-portable, fatal exceptions */
737	case XCPT_INVALID_LOCK_SEQUENCE:
738	pszExceptionName = "Invalid Lock Sequence";
739	fExcptSoftware = TRUE;
740	fExcptPortable = FALSE;
741	break;
742
743	case XCPT_ARRAY_BOUNDS_EXCEEDED:
744	pszExceptionName = "Array Bounds Exceeded";
745	fExcptSoftware = TRUE;
746	fExcptPortable = FALSE;
747	break;
748
749	/* unwind operation exceptions */
750	case XCPT_UNWIND:
751	pszExceptionName = "Unwind Exception";
752	fExcptSoftware = TRUE;
753	fExcptPortable = FALSE;
754	break;
755
756	case XCPT_BAD_STACK:
757	pszExceptionName = "Unwind Exception, Bad Stack";
758	fExcptSoftware = TRUE;
759	fExcptPortable = FALSE;
760	break;
761
762	case XCPT_INVALID_UNWIND_TARGET:
763	pszExceptionName = "Unwind Exception, Invalid Target";
764	fExcptSoftware = TRUE;
765	fExcptPortable = FALSE;
766	break;
767
768	/* fatal signal exceptions */
769	case XCPT_SIGNAL:
770	pszExceptionName = "Signal";
771	sprintf(szData,
772	"Signal Number = %08x",
773	pERepRec->ExceptionInfo[0]);
774	fExcptSoftware = TRUE;
775	fExcptPortable = FALSE;
776
777	switch (pERepRec->ExceptionInfo[0]) /* resolve signal information */
778	{
779	case XCPT_SIGNAL_INTR:
780	pszExceptionName = "Signal (Interrupt)";
781	break;
782
783	case XCPT_SIGNAL_KILLPROC:
784	pszExceptionName = "Signal (Kill Process)";
785	break;
786
787	case XCPT_SIGNAL_BREAK:
788	pszExceptionName = "Signal (Break)";
789	break;
790	}
791	break;
792
793	default:
794	pszExceptionName = "(unknown exception code)";
795	sprintf(szData,
796	"Exception Code = %08x",
797	pERepRec->ExceptionNum);
798	}
799
800
801	/* now dump the information to the logfile */
802	dprintf(("---[Exception Information]------------\n"));
803	sprintf(szData2,
804	" %s (",
805	pszExceptionName);
806
807	if (fExcptSoftware == TRUE) /* software or hardware generated ? */
808	strcat (szData2, "software generated,");
809	else
810	strcat (szData2, "hardware generated,");
811
812	if (fExcptPortable == TRUE) /* portable exception ? */
813	strcat (szData2, "portable,");
814	else
815	strcat (szData2, "non-portable,");
816
817	if (fExcptFatal == TRUE) /* fatal exception ? */
818	strcat (szData2, "fatal");
819	else
820	strcat (szData2, "non-fatal");
821
822	strcat (szData2, /* add trailing brace */
823	")\n");
824
825
826	dprintf((szData2));
827
828	if (szData[0] != 0) /* see if there is an additional entry */
829	dprintf((" %s\n",
830	szData));
831
832	rc = DosQueryModFromEIP(&ulModule,
833	&ulObject,
834	sizeof(szModule),
835	szModule,
836	&ulOffset,
837	(ULONG)pERepRec->ExceptionAddress);
838
839	dprintf((" Exception Address = %08x ",
840	pERepRec->ExceptionAddress));
841
842	if (rc == NO_ERROR)
843	dprintf(("%s (#%u), obj #%u:%08x\n",
844	szModule,
845	ulModule,
846	ulObject,
847	ulOffset));
848	else
849	dprintf(("\n"));
850
851
852	rc = DosGetInfoBlocks (&pTIB, /* query kernel information blocks */
853	&pPIB);
854	if (rc == NO_ERROR)
855	{
856	dprintf((" Thread: Ordinal TID: %u, TID: %u, Priority: %04xh\n",
857	pTIB->tib_ordinal,
858	pTIB->tib_ptib2->tib2_ultid,
859	pTIB->tib_ptib2->tib2_ulpri));
860
861	dprintf((" Process: PID: %u, Parent: %u, Status: %u\n",
862	pPIB->pib_ulpid,
863	pPIB->pib_ulppid,
864	pPIB->pib_flstatus));
865	}
866
867	if (pCtxRec->ContextFlags & CONTEXT_CONTROL) /* check flags */
868	dprintf((" SS:ESP=%04x:%08x EFLAGS=%08x\n"
869	" CS:EIP=%04x:%08x EBP =%08x\n",
870	pCtxRec->ctx_SegSs,
871	pCtxRec->ctx_RegEsp,
872	pCtxRec->ctx_EFlags,
873	pCtxRec->ctx_SegCs,
874	pCtxRec->ctx_RegEip,
875	pCtxRec->ctx_RegEbp));
876
877	if (pCtxRec->ContextFlags & CONTEXT_INTEGER) /* check flags */
878	dprintf((" EAX=%08x EBX=%08x ESI=%08x\n"
879	" ECX=%08x EDX=%08x EDI=%08x\n",
880	pCtxRec->ctx_RegEax,
881	pCtxRec->ctx_RegEbx,
882	pCtxRec->ctx_RegEsi,
883	pCtxRec->ctx_RegEcx,
884	pCtxRec->ctx_RegEdx,
885	pCtxRec->ctx_RegEdi));
886
887	if (pCtxRec->ContextFlags & CONTEXT_SEGMENTS) /* check flags */
888	dprintf((" DS=%04x ES=%08x"
889	" FS=%04x GS=%04x\n",
890	pCtxRec->ctx_SegDs,
891	pCtxRec->ctx_SegEs,
892	pCtxRec->ctx_SegFs,
893	pCtxRec->ctx_SegGs));
894
895	if (pCtxRec->ContextFlags & CONTEXT_FLOATING_POINT) /* check flags */
896	{
897	ULONG ulCounter; /* temporary local counter for fp stack */
898
899	dprintf((" Env[0]=%08x Env[1]=%08x Env[2]=%08x Env[3]=%08x\n",
900	pCtxRec->ctx_env[0],
901	pCtxRec->ctx_env[1],
902	pCtxRec->ctx_env[2],
903	pCtxRec->ctx_env[3]));
904
905	dprintf((" Env[4]=%08x Env[5]=%08x Env[6]=%08x\n",
906	pCtxRec->ctx_env[4],
907	pCtxRec->ctx_env[5],
908	pCtxRec->ctx_env[6]));
909
910	for (ulCounter = 0;
911	ulCounter < 8; /* see TOOLKIT\INCLUDE\BSEEXPT.H, _CONTEXT structure */
912	ulCounter ++)
913	dprintf((" FP-Stack[%u] losig=%08x hisig=%08x signexp=%04x\n",
914	ulCounter,
915	pCtxRec->ctx_stack[0].losig,
916	pCtxRec->ctx_stack[0].hisig,
917	pCtxRec->ctx_stack[0].signexp));
918	}
919
920	dprintf(("---[End Of Exception Information]-----\n"));
921	}
922
923
924	/*****************************************************************************
925	* Name : ERR _System OS2ExceptionHandler
926	* Purpose :
927	* Parameters: ...
928	* Variables :
929	* Result :
930	* Remark :
931	* Status :
932	*
933	* Author : Patrick Haller [Tue, 1999/07/01 09:00]
934	*****************************************************************************/
935	/* from PPC DDK */
936	#ifndef XCPT_CONTINUE_STOP
937	#define XCPT_CONTINUE_STOP 0x00716668
938	#endif
939
940	//in misc.cpp
941	void CheckLogException();
942
943	ULONG APIENTRY OS2ExceptionHandler(PEXCEPTIONREPORTRECORD pERepRec,
944	PEXCEPTIONREGISTRATIONRECORD pERegRec,
945	PCONTEXTRECORD pCtxRec,
946	PVOID p)
947	{
948	/* Access violation at a known location */
949	switch(pERepRec->ExceptionNum)
950	{
951	case XCPT_FLOAT_DENORMAL_OPERAND:
952	case XCPT_FLOAT_DIVIDE_BY_ZERO:
953	case XCPT_FLOAT_INEXACT_RESULT:
954	// case XCPT_FLOAT_INVALID_OPERATION:
955	case XCPT_FLOAT_OVERFLOW:
956	case XCPT_FLOAT_STACK_CHECK:
957	case XCPT_FLOAT_UNDERFLOW:
958	dprintfException(pERepRec, pERegRec, pCtxRec, p);
959	dprintf(("KERNEL32: OS2ExceptionHandler: FPU exception\n"));
960	if(fIsOS2Image == FALSE) //Only for real win32 apps
961	{
962	if(OSLibDispatchException(pERepRec, pERegRec, pCtxRec, p) == FALSE)
963	{
964	pCtxRec->ctx_env[0] \|= 0x1F;
965	pCtxRec->ctx_stack[0].losig = 0;
966	pCtxRec->ctx_stack[0].hisig = 0;
967	pCtxRec->ctx_stack[0].signexp = 0;
968	}
969	dprintf(("KERNEL32: OS2ExceptionHandler: fix and continue\n"));
970	return (XCPT_CONTINUE_EXECUTION);
971	}
972	else
973	{
974	dprintf(("KERNEL32: OS2ExceptionHandler: continue search\n"));
975	return (XCPT_CONTINUE_SEARCH);
976	}
977
978	case XCPT_PROCESS_TERMINATE:
979	case XCPT_ASYNC_PROCESS_TERMINATE:
980	dprintfException(pERepRec, pERegRec, pCtxRec, p);
981	SetExceptionChain((ULONG)-1);
982	return (XCPT_CONTINUE_SEARCH);
983
984	case XCPT_ACCESS_VIOLATION:
985	{
986	Win32MemMap *map;
987	BOOL fWriteAccess = FALSE;
988	ULONG offset, accessflag;
989
990	if(pERepRec->ExceptionInfo[1] == 0 && pERepRec->ExceptionInfo[1] == XCPT_DATA_UNKNOWN) {
991	goto continueFail;
992	}
993	switch(pERepRec->ExceptionInfo[0]) {
994	case XCPT_READ_ACCESS:
995	accessflag = MEMMAP_ACCESS_READ;
996	break;
997	case XCPT_WRITE_ACCESS:
998	accessflag = MEMMAP_ACCESS_WRITE;
999	fWriteAccess = TRUE;
1000	break;
1001	case XCPT_EXECUTE_ACCESS:
1002	accessflag = MEMMAP_ACCESS_EXECUTE;
1003	break;
1004	default:
1005	goto continueFail;
1006	}
1007
1008	map = Win32MemMapView::findMapByView(pERepRec->ExceptionInfo[1], &offset, accessflag);
1009	if(map == NULL) {
1010	goto continueFail;
1011	}
1012	if(map->commitPage(offset, fWriteAccess) == TRUE)
1013	return (XCPT_CONTINUE_EXECUTION);
1014
1015	//no break;
1016	}
1017	continueFail:
1018
1019	////#define DEBUGSTACK
1020	#ifdef DEBUGSTACK
1021	if(pCtxRec->ContextFlags & CONTEXT_CONTROL) {
1022	ULONG *stackptr;
1023	APIRET rc;
1024	int i;
1025	ULONG ulOffset, ulModule, ulObject;
1026	CHAR szModule[CCHMAXPATH];
1027
1028	stackptr = (ULONG *)pCtxRec->ctx_RegEsp;
1029	dprintf(("Stack DUMP:"));
1030	for(i=0;i<16;i++) {
1031	rc = DosQueryModFromEIP(&ulModule,
1032	&ulObject,
1033	sizeof(szModule),
1034	szModule,
1035	&ulOffset,
1036	(ULONG)*stackptr);
1037
1038	if (rc == NO_ERROR)
1039	dprintf(("0x%8x: 0x%8x %s (#%u), obj #%u:%08x", stackptr, *stackptr, szModule, ulModule, ulObject, ulOffset));
1040	else dprintf(("0x%8x: 0x%8x", stackptr, *stackptr));
1041	stackptr++;
1042	}
1043	dprintf(("Stack DUMP END"));
1044	}
1045	#endif
1046
1047	case XCPT_BREAKPOINT:
1048	case XCPT_ARRAY_BOUNDS_EXCEEDED:
1049	case XCPT_DATATYPE_MISALIGNMENT:
1050	case XCPT_ILLEGAL_INSTRUCTION:
1051	case XCPT_PRIVILEGED_INSTRUCTION:
1052	case XCPT_INVALID_LOCK_SEQUENCE:
1053	case XCPT_INTEGER_DIVIDE_BY_ZERO:
1054	case XCPT_INTEGER_OVERFLOW:
1055	case XCPT_SINGLE_STEP:
1056	case XCPT_UNABLE_TO_GROW_STACK:
1057	case XCPT_IN_PAGE_ERROR:
1058	CrashAndBurn:
1059	CheckLogException();
1060	dprintfException(pERepRec, pERegRec, pCtxRec, p);
1061	if(fIsOS2Image == FALSE) //Only for real win32 apps
1062	{
1063	if(OSLibDispatchException(pERepRec, pERegRec, pCtxRec, p) == TRUE)
1064	{
1065	return (XCPT_CONTINUE_EXECUTION);
1066	}
1067	}
1068	else return XCPT_CONTINUE_SEARCH; //pass on to OS/2 RTL or app exception handler
1069
1070	dprintf(("KERNEL32: OS2ExceptionHandler: Continue and kill\n"));
1071	pCtxRec->ctx_RegEip = (ULONG)KillWin32Process;
1072	pCtxRec->ctx_RegEsp = pCtxRec->ctx_RegEsp + 0x10;
1073	pCtxRec->ctx_RegEax = pERepRec->ExceptionNum;
1074	pCtxRec->ctx_RegEbx = pCtxRec->ctx_RegEip;
1075	return (XCPT_CONTINUE_EXECUTION);
1076
1077	//@@@PH: growing thread stacks might need special treatment
1078	case XCPT_GUARD_PAGE_VIOLATION:
1079	dprintf(("KERNEL32: OS2ExceptionHandler: trying to grow stack (continue)\n"));
1080	return (XCPT_CONTINUE_SEARCH);
1081
1082	case XCPT_SIGNAL:
1083	if(pERepRec->ExceptionInfo[0] == XCPT_SIGNAL_KILLPROC) /* resolve signal information */
1084	{
1085	SetExceptionChain((ULONG)-1);
1086	return (XCPT_CONTINUE_SEARCH);
1087	}
1088	goto CrashAndBurn;
1089
1090	default: //non-continuable exceptions
1091	dprintfException(pERepRec, pERegRec, pCtxRec, p);
1092	return (XCPT_CONTINUE_SEARCH);
1093	}
1094	return (XCPT_CONTINUE_SEARCH);
1095	}
1096
1097	/*****************************************************************************
1098	* Name : void OS2SetExceptionHandler
1099	* Purpose : Sets the main thread exception handler in FS:[0] (original OS/2 FS selector)
1100	* Parameters: exceptframe: pointer to exception handler frame on stack (2 ULONGs)
1101	* Variables :
1102	* Result :
1103	* Remark :
1104	* Status :
1105	*
1106	* Author : Sander van Leeuwen [Sun, 1999/08/21 12:16]
1107	*****************************************************************************/
1108	void OS2SetExceptionHandler(void *exceptframe)
1109	{
1110	PEXCEPTIONREGISTRATIONRECORD pExceptRec = (PEXCEPTIONREGISTRATIONRECORD)exceptframe;
1111
1112	pExceptRec->prev_structure = (PEXCEPTIONREGISTRATIONRECORD)0;
1113	pExceptRec->ExceptionHandler = OS2ExceptionHandler;
1114
1115	/* disable trap popups */
1116	// DosError(FERR_DISABLEEXCEPTION \| FERR_DISABLEHARDERR);
1117
1118	DosSetExceptionHandler(pExceptRec);
1119	dprintf(("OS2SetExceptionHandler: exception chain %x", pExceptRec));
1120	PrintExceptionChain();
1121	}
1122
1123	#ifdef DEBUG
1124	void PrintExceptionChain()
1125	{
1126	USHORT sel = RestoreOS2FS();
1127	PEXCEPTIONREGISTRATIONRECORD pExceptRec = (PEXCEPTIONREGISTRATIONRECORD)QueryExceptionChain();
1128
1129	dprintf(("Exception chain list:"));
1130	while(pExceptRec != 0 && (ULONG)pExceptRec != -1) {
1131	dprintf(("record %x", pExceptRec));
1132	pExceptRec = pExceptRec->prev_structure;
1133	}
1134	SetFS(sel);
1135	}
1136	#endif
1137
1138
1139	/*****************************************************************************
1140	* Name : void OS2UnsetExceptionHandler
1141	* Purpose : Removes the main thread exception handler in FS:[0] (original OS/2 FS selector)
1142	* Parameters: exceptframe: pointer to exception handler frame on stack (2 ULONGs)
1143	* Variables :
1144	* Result :
1145	* Remark :
1146	* Status :
1147	*
1148	* Author : Sander van Leeuwen [Sun, 1999/08/21 12:16]
1149	*****************************************************************************/
1150	void OS2UnsetExceptionHandler(void *exceptframe)
1151	{
1152	PEXCEPTIONREGISTRATIONRECORD pExceptRec = (PEXCEPTIONREGISTRATIONRECORD)exceptframe;
1153
1154	DosUnsetExceptionHandler(pExceptRec);
1155	dprintf(("OS2UnsetExceptionHandler: exception chain %x", pExceptRec));
1156	PrintExceptionChain();
1157	}
1158
1159	void SetOS2ExceptionChain(ULONG val)
1160	{
1161	USHORT sel = GetFS();
1162
1163	SetExceptionChain(val);
1164	SetFS(sel);
1165	}
1166
1167	int _System CheckCurFS()
1168	{
1169	USHORT sel = RestoreOS2FS();
1170	PEXCEPTIONREGISTRATIONRECORD pExceptRec;
1171
1172	if(sel == 0x150b) {
1173	SetFS(sel);
1174	return FALSE;
1175	}
1176	pExceptRec = (PEXCEPTIONREGISTRATIONRECORD)QueryExceptionChain();
1177	if(pExceptRec->ExceptionHandler != OS2ExceptionHandler) {
1178	SetFS(sel);
1179	return FALSE;
1180	}
1181	SetFS(sel);
1182	return TRUE;
1183	}
1184

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