2 * msvcrt C++ exception handling
4 * Copyright 2000 Jon Griffiths
5 * Copyright 2002 Alexandre Julliard
6 * Copyright 2005 Juan Lang
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
23 * A good reference is the article "How a C++ compiler implements
24 * exception handling" by Vishal Kochhar, available on
25 * www.thecodeproject.com.
29 #include "wine/port.h"
39 #include "wine/exception.h"
41 #include "wine/debug.h"
43 #include "cppexcept.h"
45 WINE_DEFAULT_DEBUG_CHANNEL(seh
);
48 /* the exception frame used by CxxFrameHandler */
49 typedef struct __cxx_exception_frame
51 EXCEPTION_REGISTRATION_RECORD frame
; /* the standard exception frame */
54 } cxx_exception_frame
;
56 /* info about a single catch {} block */
57 typedef struct __catchblock_info
59 UINT flags
; /* flags (see below) */
60 const type_info
*type_info
; /* C++ type caught by this block */
61 int offset
; /* stack offset to copy exception object to */
62 void (*handler
)(void);/* catch block handler code */
64 #define TYPE_FLAG_CONST 1
65 #define TYPE_FLAG_VOLATILE 2
66 #define TYPE_FLAG_REFERENCE 8
68 /* info about a single try {} block */
69 typedef struct __tryblock_info
71 int start_level
; /* start trylevel of that block */
72 int end_level
; /* end trylevel of that block */
73 int catch_level
; /* initial trylevel of the catch block */
74 int catchblock_count
; /* count of catch blocks in array */
75 const catchblock_info
*catchblock
; /* array of catch blocks */
78 /* info about the unwind handler for a given trylevel */
79 typedef struct __unwind_info
81 int prev
; /* prev trylevel unwind handler, to run after this one */
82 void (*handler
)(void);/* unwind handler */
85 /* descriptor of all try blocks of a given function */
86 typedef struct __cxx_function_descr
88 UINT magic
; /* must be CXX_FRAME_MAGIC */
89 UINT unwind_count
; /* number of unwind handlers */
90 const unwind_info
*unwind_table
; /* array of unwind handlers */
91 UINT tryblock_count
; /* number of try blocks */
92 const tryblock_info
*tryblock
; /* array of try blocks */
95 const void *expect_list
; /* expected exceptions list when magic >= VC7 */
96 UINT flags
; /* flags when magic >= VC8 */
101 cxx_exception_frame
*frame
;
102 const cxx_function_descr
*descr
;
103 EXCEPTION_REGISTRATION_RECORD
*nested_frame
;
106 typedef struct _SCOPETABLE
108 int previousTryLevel
;
109 int (*lpfnFilter
)(PEXCEPTION_POINTERS
);
110 int (*lpfnHandler
)(void);
111 } SCOPETABLE
, *PSCOPETABLE
;
113 typedef struct _MSVCRT_EXCEPTION_FRAME
115 EXCEPTION_REGISTRATION_RECORD
*prev
;
116 void (*handler
)(PEXCEPTION_RECORD
, EXCEPTION_REGISTRATION_RECORD
*,
117 PCONTEXT
, PEXCEPTION_RECORD
);
118 PSCOPETABLE scopetable
;
121 PEXCEPTION_POINTERS xpointers
;
122 } MSVCRT_EXCEPTION_FRAME
;
126 int gs_cookie_offset
;
128 int eh_cookie_offset
;
130 SCOPETABLE entries
[1];
133 #define TRYLEVEL_END (-1) /* End of trylevel list */
135 DWORD CDECL
cxx_frame_handler( PEXCEPTION_RECORD rec
, cxx_exception_frame
* frame
,
136 PCONTEXT context
, EXCEPTION_REGISTRATION_RECORD
** dispatch
,
137 const cxx_function_descr
*descr
,
138 EXCEPTION_REGISTRATION_RECORD
* nested_frame
, int nested_trylevel
) DECLSPEC_HIDDEN
;
140 /* call a function with a given ebp */
141 static inline void *call_ebp_func( void *func
, void *ebp
)
145 __asm__
__volatile__ ("pushl %%ebx\n\t"
151 : "=a" (ret
), "=S" (dummy
), "=D" (dummy
)
152 : "0" (func
), "1" (ebp
) : "ecx", "edx", "memory" );
156 /* call a copy constructor */
157 static inline void call_copy_ctor( void *func
, void *this, void *src
, int has_vbase
)
159 TRACE( "calling copy ctor %p object %p src %p\n", func
, this, src
);
161 /* in that case copy ctor takes an extra bool indicating whether to copy the base class */
162 __asm__
__volatile__("pushl $1; pushl %2; call *%0"
163 : : "r" (func
), "c" (this), "r" (src
) : "eax", "edx", "memory" );
165 __asm__
__volatile__("pushl %2; call *%0"
166 : : "r" (func
), "c" (this), "r" (src
) : "eax", "edx", "memory" );
169 /* continue execution to the specified address after exception is caught */
170 static inline void DECLSPEC_NORETURN
continue_after_catch( cxx_exception_frame
* frame
, void *addr
)
172 __asm__
__volatile__("movl -4(%0),%%esp; leal 12(%0),%%ebp; jmp *%1"
173 : : "r" (frame
), "a" (addr
) );
174 for (;;) ; /* unreached */
177 static inline void call_finally_block( void *code_block
, void *base_ptr
)
179 __asm__
__volatile__ ("movl %1,%%ebp; call *%%eax"
180 : : "a" (code_block
), "g" (base_ptr
));
183 static inline int call_filter( int (*func
)(PEXCEPTION_POINTERS
), void *arg
, void *ebp
)
186 __asm__
__volatile__ ("pushl %%ebp; pushl %3; movl %2,%%ebp; call *%%eax; popl %%ebp; popl %%ebp"
188 : "0" (func
), "r" (ebp
), "r" (arg
)
189 : "ecx", "edx", "memory" );
193 static inline int call_unwind_func( int (*func
)(void), void *ebp
)
196 __asm__
__volatile__ ("pushl %%ebp\n\t"
207 : "0" (func
), "r" (ebp
)
208 : "ecx", "edx", "memory" );
212 static inline void dump_type( const cxx_type_info
*type
)
214 TRACE( "flags %x type %p %s offsets %d,%d,%d size %d copy ctor %p\n",
215 type
->flags
, type
->type_info
, dbgstr_type_info(type
->type_info
),
216 type
->offsets
.this_offset
, type
->offsets
.vbase_descr
, type
->offsets
.vbase_offset
,
217 type
->size
, type
->copy_ctor
);
220 static void dump_exception_type( const cxx_exception_type
*type
)
224 TRACE( "flags %x destr %p handler %p type info %p\n",
225 type
->flags
, type
->destructor
, type
->custom_handler
, type
->type_info_table
);
226 for (i
= 0; i
< type
->type_info_table
->count
; i
++)
229 dump_type( type
->type_info_table
->info
[i
] );
233 static void dump_function_descr( const cxx_function_descr
*descr
)
238 TRACE( "magic %x\n", descr
->magic
);
239 TRACE( "unwind table: %p %d\n", descr
->unwind_table
, descr
->unwind_count
);
240 for (i
= 0; i
< descr
->unwind_count
; i
++)
242 TRACE( " %d: prev %d func %p\n", i
,
243 descr
->unwind_table
[i
].prev
, descr
->unwind_table
[i
].handler
);
245 TRACE( "try table: %p %d\n", descr
->tryblock
, descr
->tryblock_count
);
246 for (i
= 0; i
< descr
->tryblock_count
; i
++)
248 TRACE( " %d: start %d end %d catchlevel %d catch %p %d\n", i
,
249 descr
->tryblock
[i
].start_level
, descr
->tryblock
[i
].end_level
,
250 descr
->tryblock
[i
].catch_level
, descr
->tryblock
[i
].catchblock
,
251 descr
->tryblock
[i
].catchblock_count
);
252 for (j
= 0; j
< descr
->tryblock
[i
].catchblock_count
; j
++)
254 const catchblock_info
*ptr
= &descr
->tryblock
[i
].catchblock
[j
];
255 TRACE( " %d: flags %x offset %d handler %p type %p %s\n",
256 j
, ptr
->flags
, ptr
->offset
, ptr
->handler
,
257 ptr
->type_info
, dbgstr_type_info( ptr
->type_info
) );
260 if (descr
->magic
<= CXX_FRAME_MAGIC_VC6
) return;
261 TRACE( "expect list: %p\n", descr
->expect_list
);
262 if (descr
->magic
<= CXX_FRAME_MAGIC_VC7
) return;
263 TRACE( "flags: %08x\n", descr
->flags
);
266 /* check if the exception type is caught by a given catch block, and return the type that matched */
267 static const cxx_type_info
*find_caught_type( cxx_exception_type
*exc_type
,
268 const type_info
*catch_ti
, UINT catch_flags
)
272 for (i
= 0; i
< exc_type
->type_info_table
->count
; i
++)
274 const cxx_type_info
*type
= exc_type
->type_info_table
->info
[i
];
276 if (!catch_ti
) return type
; /* catch(...) matches any type */
277 if (catch_ti
!= type
->type_info
)
279 if (strcmp( catch_ti
->mangled
, type
->type_info
->mangled
)) continue;
281 /* type is the same, now check the flags */
282 if ((exc_type
->flags
& TYPE_FLAG_CONST
) &&
283 !(catch_flags
& TYPE_FLAG_CONST
)) continue;
284 if ((exc_type
->flags
& TYPE_FLAG_VOLATILE
) &&
285 !(catch_flags
& TYPE_FLAG_VOLATILE
)) continue;
286 return type
; /* it matched */
292 /* copy the exception object where the catch block wants it */
293 static void copy_exception( void *object
, cxx_exception_frame
*frame
,
294 const catchblock_info
*catchblock
, const cxx_type_info
*type
)
298 if (!catchblock
->type_info
|| !catchblock
->type_info
->mangled
[0]) return;
299 if (!catchblock
->offset
) return;
300 dest_ptr
= (void **)((char *)&frame
->ebp
+ catchblock
->offset
);
302 if (catchblock
->flags
& TYPE_FLAG_REFERENCE
)
304 *dest_ptr
= get_this_pointer( &type
->offsets
, object
);
306 else if (type
->flags
& CLASS_IS_SIMPLE_TYPE
)
308 memmove( dest_ptr
, object
, type
->size
);
309 /* if it is a pointer, adjust it */
310 if (type
->size
== sizeof(void *)) *dest_ptr
= get_this_pointer( &type
->offsets
, *dest_ptr
);
312 else /* copy the object */
315 call_copy_ctor( type
->copy_ctor
, dest_ptr
, get_this_pointer(&type
->offsets
,object
),
316 (type
->flags
& CLASS_HAS_VIRTUAL_BASE_CLASS
) );
318 memmove( dest_ptr
, get_this_pointer(&type
->offsets
,object
), type
->size
);
322 /* unwind the local function up to a given trylevel */
323 static void cxx_local_unwind( cxx_exception_frame
* frame
, const cxx_function_descr
*descr
, int last_level
)
325 void (*handler
)(void);
326 int trylevel
= frame
->trylevel
;
328 while (trylevel
!= last_level
)
330 if (trylevel
< 0 || trylevel
>= descr
->unwind_count
)
332 ERR( "invalid trylevel %d\n", trylevel
);
335 handler
= descr
->unwind_table
[trylevel
].handler
;
338 TRACE( "calling unwind handler %p trylevel %d last %d ebp %p\n",
339 handler
, trylevel
, last_level
, &frame
->ebp
);
340 call_ebp_func( handler
, &frame
->ebp
);
342 trylevel
= descr
->unwind_table
[trylevel
].prev
;
344 frame
->trylevel
= last_level
;
347 /* exception frame for nested exceptions in catch block */
348 struct catch_func_nested_frame
350 EXCEPTION_REGISTRATION_RECORD frame
; /* standard exception frame */
351 cxx_exception_frame
*cxx_frame
; /* frame of parent exception */
352 const cxx_function_descr
*descr
; /* descriptor of parent exception */
353 int trylevel
; /* current try level */
354 cxx_frame_info frame_info
;
357 /* handler for exceptions happening while calling a catch function */
358 static DWORD
catch_function_nested_handler( EXCEPTION_RECORD
*rec
, EXCEPTION_REGISTRATION_RECORD
*frame
,
359 CONTEXT
*context
, EXCEPTION_REGISTRATION_RECORD
**dispatcher
)
361 struct catch_func_nested_frame
*nested_frame
= (struct catch_func_nested_frame
*)frame
;
363 if (rec
->ExceptionFlags
& (EH_UNWINDING
| EH_EXIT_UNWIND
))
365 __CxxUnregisterExceptionObject(&nested_frame
->frame_info
, FALSE
);
366 return ExceptionContinueSearch
;
369 TRACE( "got nested exception in catch function\n" );
371 if(rec
->ExceptionCode
== CXX_EXCEPTION
)
373 PEXCEPTION_RECORD prev_rec
= msvcrt_get_thread_data()->exc_record
;
375 if((rec
->ExceptionInformation
[1] == 0 && rec
->ExceptionInformation
[2] == 0) ||
376 (prev_rec
->ExceptionCode
== CXX_EXCEPTION
&&
377 rec
->ExceptionInformation
[1] == prev_rec
->ExceptionInformation
[1] &&
378 rec
->ExceptionInformation
[2] == prev_rec
->ExceptionInformation
[2]))
380 /* exception was rethrown */
382 rec
->ExceptionFlags
&= ~EH_UNWINDING
;
384 TRACE("detect rethrow: exception code: %x\n", rec
->ExceptionCode
);
385 if(rec
->ExceptionCode
== CXX_EXCEPTION
)
386 TRACE("re-propage: obj: %lx, type: %lx\n",
387 rec
->ExceptionInformation
[1], rec
->ExceptionInformation
[2]);
392 TRACE("detect threw new exception in catch block\n");
396 return cxx_frame_handler( rec
, nested_frame
->cxx_frame
, context
,
397 NULL
, nested_frame
->descr
, &nested_frame
->frame
,
398 nested_frame
->trylevel
);
401 /* find and call the appropriate catch block for an exception */
402 /* returns the address to continue execution to after the catch block was called */
403 static inline void call_catch_block( PEXCEPTION_RECORD rec
, CONTEXT
*context
,
404 cxx_exception_frame
*frame
,
405 const cxx_function_descr
*descr
, int nested_trylevel
,
406 EXCEPTION_REGISTRATION_RECORD
*catch_frame
,
407 cxx_exception_type
*info
)
411 void *addr
, *object
= (void *)rec
->ExceptionInformation
[1];
412 struct catch_func_nested_frame nested_frame
;
413 int trylevel
= frame
->trylevel
;
414 DWORD save_esp
= ((DWORD
*)frame
)[-1];
415 thread_data_t
*data
= msvcrt_get_thread_data();
417 data
->processing_throw
++;
418 for (i
= 0; i
< descr
->tryblock_count
; i
++)
420 const tryblock_info
*tryblock
= &descr
->tryblock
[i
];
422 /* only handle try blocks inside current catch block */
423 if (catch_frame
&& nested_trylevel
> tryblock
->start_level
) continue;
425 if (trylevel
< tryblock
->start_level
) continue;
426 if (trylevel
> tryblock
->end_level
) continue;
428 /* got a try block */
429 for (j
= 0; j
< tryblock
->catchblock_count
; j
++)
431 const catchblock_info
*catchblock
= &tryblock
->catchblock
[j
];
434 const cxx_type_info
*type
= find_caught_type( info
,
435 catchblock
->type_info
, catchblock
->flags
);
438 TRACE( "matched type %p in tryblock %d catchblock %d\n", type
, i
, j
);
440 /* copy the exception to its destination on the stack */
441 copy_exception( object
, frame
, catchblock
, type
);
445 /* no CXX_EXCEPTION only proceed with a catch(...) block*/
446 if(catchblock
->type_info
)
448 TRACE("found catch(...) block\n");
451 /* Add frame info here so exception is not freed inside RtlUnwind call */
452 _CreateFrameInfo(&nested_frame
.frame_info
.frame_info
,
453 (void*)rec
->ExceptionInformation
[1]);
455 /* unwind the stack */
456 RtlUnwind( catch_frame
? catch_frame
: &frame
->frame
, 0, rec
, 0 );
457 cxx_local_unwind( frame
, descr
, tryblock
->start_level
);
458 frame
->trylevel
= tryblock
->end_level
+ 1;
460 nested_frame
.frame_info
.rec
= data
->exc_record
;
461 nested_frame
.frame_info
.context
= data
->ctx_record
;
462 data
->exc_record
= rec
;
463 data
->ctx_record
= context
;
464 data
->processing_throw
--;
466 /* call the catch block */
467 TRACE( "calling catch block %p addr %p ebp %p\n",
468 catchblock
, catchblock
->handler
, &frame
->ebp
);
470 /* setup an exception block for nested exceptions */
471 nested_frame
.frame
.Handler
= catch_function_nested_handler
;
472 nested_frame
.cxx_frame
= frame
;
473 nested_frame
.descr
= descr
;
474 nested_frame
.trylevel
= nested_trylevel
+ 1;
476 __wine_push_frame( &nested_frame
.frame
);
477 addr
= call_ebp_func( catchblock
->handler
, &frame
->ebp
);
478 __wine_pop_frame( &nested_frame
.frame
);
480 ((DWORD
*)frame
)[-1] = save_esp
;
481 __CxxUnregisterExceptionObject(&nested_frame
.frame_info
, FALSE
);
482 TRACE( "done, continuing at %p\n", addr
);
484 continue_after_catch( frame
, addr
);
487 data
->processing_throw
--;
490 /*********************************************************************
491 * __CxxExceptionFilter (MSVCRT.@)
493 int CDECL
__CxxExceptionFilter( PEXCEPTION_POINTERS ptrs
,
494 const type_info
*ti
, int flags
, void **copy
)
496 const cxx_type_info
*type
;
497 PEXCEPTION_RECORD rec
;
499 TRACE( "%p %p %x %p\n", ptrs
, ti
, flags
, copy
);
501 if (!ptrs
) return EXCEPTION_CONTINUE_SEARCH
;
503 /* handle catch(...) */
504 if (!ti
) return EXCEPTION_EXECUTE_HANDLER
;
506 rec
= ptrs
->ExceptionRecord
;
507 if (rec
->ExceptionCode
!= CXX_EXCEPTION
|| rec
->NumberParameters
!= 3 ||
508 rec
->ExceptionInformation
[0] < CXX_FRAME_MAGIC_VC6
||
509 rec
->ExceptionInformation
[0] > CXX_FRAME_MAGIC_VC8
)
510 return EXCEPTION_CONTINUE_SEARCH
;
512 if (rec
->ExceptionInformation
[1] == 0 && rec
->ExceptionInformation
[2] == 0)
514 rec
= msvcrt_get_thread_data()->exc_record
;
515 if (!rec
) return EXCEPTION_CONTINUE_SEARCH
;
518 type
= find_caught_type( (cxx_exception_type
*)rec
->ExceptionInformation
[2], ti
, flags
);
519 if (!type
) return EXCEPTION_CONTINUE_SEARCH
;
523 void *object
= (void *)rec
->ExceptionInformation
[1];
525 if (flags
& TYPE_FLAG_REFERENCE
)
527 *copy
= get_this_pointer( &type
->offsets
, object
);
529 else if (type
->flags
& CLASS_IS_SIMPLE_TYPE
)
531 memmove( copy
, object
, type
->size
);
532 /* if it is a pointer, adjust it */
533 if (type
->size
== sizeof(void*)) *copy
= get_this_pointer( &type
->offsets
, *copy
);
535 else /* copy the object */
538 call_copy_ctor( type
->copy_ctor
, copy
, get_this_pointer(&type
->offsets
,object
),
539 (type
->flags
& CLASS_HAS_VIRTUAL_BASE_CLASS
) );
541 memmove( copy
, get_this_pointer(&type
->offsets
,object
), type
->size
);
544 return EXCEPTION_EXECUTE_HANDLER
;
547 static LONG CALLBACK
se_translation_filter( EXCEPTION_POINTERS
*ep
, void *c
)
549 se_translator_ctx
*ctx
= (se_translator_ctx
*)c
;
550 EXCEPTION_RECORD
*rec
= ep
->ExceptionRecord
;
551 cxx_exception_type
*exc_type
;
553 if (rec
->ExceptionCode
!= CXX_EXCEPTION
)
555 TRACE( "non-c++ exception thrown in SEH handler: %x\n", rec
->ExceptionCode
);
559 exc_type
= (cxx_exception_type
*)rec
->ExceptionInformation
[2];
560 call_catch_block( rec
, ep
->ContextRecord
, ctx
->frame
, ctx
->descr
,
561 ctx
->frame
->trylevel
, ctx
->nested_frame
, exc_type
);
563 __DestructExceptionObject( rec
);
564 return ExceptionContinueSearch
;
567 /*********************************************************************
570 * Implementation of __CxxFrameHandler.
572 DWORD CDECL
cxx_frame_handler( PEXCEPTION_RECORD rec
, cxx_exception_frame
* frame
,
573 PCONTEXT context
, EXCEPTION_REGISTRATION_RECORD
** dispatch
,
574 const cxx_function_descr
*descr
,
575 EXCEPTION_REGISTRATION_RECORD
* nested_frame
,
576 int nested_trylevel
)
578 cxx_exception_type
*exc_type
;
580 if (descr
->magic
< CXX_FRAME_MAGIC_VC6
|| descr
->magic
> CXX_FRAME_MAGIC_VC8
)
582 ERR( "invalid frame magic %x\n", descr
->magic
);
583 return ExceptionContinueSearch
;
585 if (descr
->magic
>= CXX_FRAME_MAGIC_VC8
&&
586 (descr
->flags
& FUNC_DESCR_SYNCHRONOUS
) &&
587 (rec
->ExceptionCode
!= CXX_EXCEPTION
))
588 return ExceptionContinueSearch
; /* handle only c++ exceptions */
590 if (rec
->ExceptionFlags
& (EH_UNWINDING
|EH_EXIT_UNWIND
))
592 if (descr
->unwind_count
&& !nested_trylevel
) cxx_local_unwind( frame
, descr
, -1 );
593 return ExceptionContinueSearch
;
595 if (!descr
->tryblock_count
) return ExceptionContinueSearch
;
597 if(rec
->ExceptionCode
== CXX_EXCEPTION
&&
598 rec
->ExceptionInformation
[1] == 0 && rec
->ExceptionInformation
[2] == 0)
600 *rec
= *msvcrt_get_thread_data()->exc_record
;
601 rec
->ExceptionFlags
&= ~EH_UNWINDING
;
603 TRACE("detect rethrow: exception code: %x\n", rec
->ExceptionCode
);
604 if(rec
->ExceptionCode
== CXX_EXCEPTION
)
605 TRACE("re-propage: obj: %lx, type: %lx\n",
606 rec
->ExceptionInformation
[1], rec
->ExceptionInformation
[2]);
610 if(rec
->ExceptionCode
== CXX_EXCEPTION
)
612 exc_type
= (cxx_exception_type
*)rec
->ExceptionInformation
[2];
614 if (rec
->ExceptionInformation
[0] > CXX_FRAME_MAGIC_VC8
&&
615 exc_type
->custom_handler
)
617 return exc_type
->custom_handler( rec
, frame
, context
, dispatch
,
618 descr
, nested_trylevel
, nested_frame
, 0 );
623 TRACE("handling C++ exception rec %p frame %p trylevel %d descr %p nested_frame %p\n",
624 rec
, frame
, frame
->trylevel
, descr
, nested_frame
);
625 dump_exception_type( exc_type
);
626 dump_function_descr( descr
);
631 thread_data_t
*data
= msvcrt_get_thread_data();
634 TRACE("handling C exception code %x rec %p frame %p trylevel %d descr %p nested_frame %p\n",
635 rec
->ExceptionCode
, rec
, frame
, frame
->trylevel
, descr
, nested_frame
);
637 if (data
->se_translator
) {
638 EXCEPTION_POINTERS except_ptrs
;
639 se_translator_ctx ctx
;
643 ctx
.nested_frame
= nested_frame
;
646 except_ptrs
.ExceptionRecord
= rec
;
647 except_ptrs
.ContextRecord
= context
;
648 data
->se_translator( rec
->ExceptionCode
, &except_ptrs
);
650 __EXCEPT_CTX(se_translation_filter
, &ctx
)
657 call_catch_block( rec
, context
, frame
, descr
,
658 frame
->trylevel
, nested_frame
, exc_type
);
659 return ExceptionContinueSearch
;
663 /*********************************************************************
664 * __CxxFrameHandler (MSVCRT.@)
666 extern DWORD CDECL
__CxxFrameHandler( PEXCEPTION_RECORD rec
, EXCEPTION_REGISTRATION_RECORD
* frame
,
667 PCONTEXT context
, EXCEPTION_REGISTRATION_RECORD
** dispatch
);
668 __ASM_GLOBAL_FUNC( __CxxFrameHandler
,
669 "pushl $0\n\t" /* nested_trylevel */
670 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
671 "pushl $0\n\t" /* nested_frame */
672 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
673 "pushl %eax\n\t" /* descr */
674 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
675 "pushl 28(%esp)\n\t" /* dispatch */
676 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
677 "pushl 28(%esp)\n\t" /* context */
678 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
679 "pushl 28(%esp)\n\t" /* frame */
680 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
681 "pushl 28(%esp)\n\t" /* rec */
682 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
683 "call " __ASM_NAME("cxx_frame_handler") "\n\t"
685 __ASM_CFI(".cfi_adjust_cfa_offset -28\n\t")
689 /*********************************************************************
690 * __CxxLongjmpUnwind (MSVCRT.@)
692 * Callback meant to be used as UnwindFunc for setjmp/longjmp.
694 void __stdcall
__CxxLongjmpUnwind( const struct MSVCRT___JUMP_BUFFER
*buf
)
696 cxx_exception_frame
*frame
= (cxx_exception_frame
*)buf
->Registration
;
697 const cxx_function_descr
*descr
= (const cxx_function_descr
*)buf
->UnwindData
[0];
699 TRACE( "unwinding frame %p descr %p trylevel %ld\n", frame
, descr
, buf
->TryLevel
);
700 cxx_local_unwind( frame
, descr
, buf
->TryLevel
);
703 /*********************************************************************
704 * __CppXcptFilter (MSVCRT.@)
706 int CDECL
__CppXcptFilter(NTSTATUS ex
, PEXCEPTION_POINTERS ptr
)
708 /* only filter c++ exceptions */
709 if (ex
!= CXX_EXCEPTION
) return EXCEPTION_CONTINUE_SEARCH
;
710 return _XcptFilter( ex
, ptr
);
713 /*********************************************************************
714 * __CxxDetectRethrow (MSVCRT.@)
716 BOOL CDECL
__CxxDetectRethrow(PEXCEPTION_POINTERS ptrs
)
718 PEXCEPTION_RECORD rec
;
723 rec
= ptrs
->ExceptionRecord
;
725 if (rec
->ExceptionCode
== CXX_EXCEPTION
&&
726 rec
->NumberParameters
== 3 &&
727 rec
->ExceptionInformation
[0] == CXX_FRAME_MAGIC_VC6
&&
728 rec
->ExceptionInformation
[2])
730 ptrs
->ExceptionRecord
= msvcrt_get_thread_data()->exc_record
;
733 return (msvcrt_get_thread_data()->exc_record
== rec
);
736 /*********************************************************************
737 * __CxxQueryExceptionSize (MSVCRT.@)
739 unsigned int CDECL
__CxxQueryExceptionSize(void)
741 return sizeof(cxx_exception_type
);
745 /*********************************************************************
746 * _EH_prolog (MSVCRT.@)
749 /* Provided for VC++ binary compatibility only */
750 __ASM_GLOBAL_FUNC(_EH_prolog
,
751 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t") /* skip ret addr */
753 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
755 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
757 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
758 "movl %esp, %fs:0\n\t"
759 "movl 12(%esp), %eax\n\t"
760 "movl %ebp, 12(%esp)\n\t"
761 "leal 12(%esp), %ebp\n\t"
763 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
766 static const SCOPETABLE_V4
*get_scopetable_v4( MSVCRT_EXCEPTION_FRAME
*frame
, ULONG_PTR cookie
)
768 return (const SCOPETABLE_V4
*)((ULONG_PTR
)frame
->scopetable
^ cookie
);
771 static DWORD
MSVCRT_nested_handler(PEXCEPTION_RECORD rec
,
772 EXCEPTION_REGISTRATION_RECORD
* frame
,
774 EXCEPTION_REGISTRATION_RECORD
** dispatch
)
776 if (!(rec
->ExceptionFlags
& (EH_UNWINDING
| EH_EXIT_UNWIND
)))
777 return ExceptionContinueSearch
;
779 return ExceptionCollidedUnwind
;
782 static void msvcrt_local_unwind2(MSVCRT_EXCEPTION_FRAME
* frame
, int trylevel
, void *ebp
)
784 EXCEPTION_REGISTRATION_RECORD reg
;
786 TRACE("(%p,%d,%d)\n",frame
, frame
->trylevel
, trylevel
);
788 /* Register a handler in case of a nested exception */
789 reg
.Handler
= MSVCRT_nested_handler
;
790 reg
.Prev
= NtCurrentTeb()->Tib
.ExceptionList
;
791 __wine_push_frame(®
);
793 while (frame
->trylevel
!= TRYLEVEL_END
&& frame
->trylevel
!= trylevel
)
795 int level
= frame
->trylevel
;
796 frame
->trylevel
= frame
->scopetable
[level
].previousTryLevel
;
797 if (!frame
->scopetable
[level
].lpfnFilter
)
799 TRACE( "__try block cleanup level %d handler %p ebp %p\n",
800 level
, frame
->scopetable
[level
].lpfnHandler
, ebp
);
801 call_unwind_func( frame
->scopetable
[level
].lpfnHandler
, ebp
);
804 __wine_pop_frame(®
);
805 TRACE("unwound OK\n");
808 static void msvcrt_local_unwind4( ULONG
*cookie
, MSVCRT_EXCEPTION_FRAME
* frame
, int trylevel
, void *ebp
)
810 EXCEPTION_REGISTRATION_RECORD reg
;
811 const SCOPETABLE_V4
*scopetable
= get_scopetable_v4( frame
, *cookie
);
813 TRACE("(%p,%d,%d)\n",frame
, frame
->trylevel
, trylevel
);
815 /* Register a handler in case of a nested exception */
816 reg
.Handler
= MSVCRT_nested_handler
;
817 reg
.Prev
= NtCurrentTeb()->Tib
.ExceptionList
;
818 __wine_push_frame(®
);
820 while (frame
->trylevel
!= -2 && frame
->trylevel
!= trylevel
)
822 int level
= frame
->trylevel
;
823 frame
->trylevel
= scopetable
->entries
[level
].previousTryLevel
;
824 if (!scopetable
->entries
[level
].lpfnFilter
)
826 TRACE( "__try block cleanup level %d handler %p ebp %p\n",
827 level
, scopetable
->entries
[level
].lpfnHandler
, ebp
);
828 call_unwind_func( scopetable
->entries
[level
].lpfnHandler
, ebp
);
831 __wine_pop_frame(®
);
832 TRACE("unwound OK\n");
835 /*******************************************************************
836 * _local_unwind2 (MSVCRT.@)
838 void CDECL
_local_unwind2(MSVCRT_EXCEPTION_FRAME
* frame
, int trylevel
)
840 msvcrt_local_unwind2( frame
, trylevel
, &frame
->_ebp
);
843 /*******************************************************************
844 * _local_unwind4 (MSVCRT.@)
846 void CDECL
_local_unwind4( ULONG
*cookie
, MSVCRT_EXCEPTION_FRAME
* frame
, int trylevel
)
848 msvcrt_local_unwind4( cookie
, frame
, trylevel
, &frame
->_ebp
);
851 /*******************************************************************
852 * _global_unwind2 (MSVCRT.@)
854 void CDECL
_global_unwind2(EXCEPTION_REGISTRATION_RECORD
* frame
)
856 TRACE("(%p)\n",frame
);
857 RtlUnwind( frame
, 0, 0, 0 );
860 /*********************************************************************
861 * _except_handler2 (MSVCRT.@)
863 int CDECL
_except_handler2(PEXCEPTION_RECORD rec
,
864 EXCEPTION_REGISTRATION_RECORD
* frame
,
866 EXCEPTION_REGISTRATION_RECORD
** dispatcher
)
868 FIXME("exception %x flags=%x at %p handler=%p %p %p stub\n",
869 rec
->ExceptionCode
, rec
->ExceptionFlags
, rec
->ExceptionAddress
,
870 frame
->Handler
, context
, dispatcher
);
871 return ExceptionContinueSearch
;
874 /*********************************************************************
875 * _except_handler3 (MSVCRT.@)
877 int CDECL
_except_handler3(PEXCEPTION_RECORD rec
,
878 MSVCRT_EXCEPTION_FRAME
* frame
,
879 PCONTEXT context
, void* dispatcher
)
881 int retval
, trylevel
;
882 EXCEPTION_POINTERS exceptPtrs
;
883 PSCOPETABLE pScopeTable
;
885 TRACE("exception %x flags=%x at %p handler=%p %p %p semi-stub\n",
886 rec
->ExceptionCode
, rec
->ExceptionFlags
, rec
->ExceptionAddress
,
887 frame
->handler
, context
, dispatcher
);
889 __asm__
__volatile__ ("cld");
891 if (rec
->ExceptionFlags
& (EH_UNWINDING
| EH_EXIT_UNWIND
))
893 /* Unwinding the current frame */
894 msvcrt_local_unwind2(frame
, TRYLEVEL_END
, &frame
->_ebp
);
895 TRACE("unwound current frame, returning ExceptionContinueSearch\n");
896 return ExceptionContinueSearch
;
900 /* Hunting for handler */
901 exceptPtrs
.ExceptionRecord
= rec
;
902 exceptPtrs
.ContextRecord
= context
;
903 *((DWORD
*)frame
-1) = (DWORD
)&exceptPtrs
;
904 trylevel
= frame
->trylevel
;
905 pScopeTable
= frame
->scopetable
;
907 while (trylevel
!= TRYLEVEL_END
)
909 TRACE( "level %d prev %d filter %p\n", trylevel
, pScopeTable
[trylevel
].previousTryLevel
,
910 pScopeTable
[trylevel
].lpfnFilter
);
911 if (pScopeTable
[trylevel
].lpfnFilter
)
913 retval
= call_filter( pScopeTable
[trylevel
].lpfnFilter
, &exceptPtrs
, &frame
->_ebp
);
915 TRACE("filter returned %s\n", retval
== EXCEPTION_CONTINUE_EXECUTION
?
916 "CONTINUE_EXECUTION" : retval
== EXCEPTION_EXECUTE_HANDLER
?
917 "EXECUTE_HANDLER" : "CONTINUE_SEARCH");
919 if (retval
== EXCEPTION_CONTINUE_EXECUTION
)
920 return ExceptionContinueExecution
;
922 if (retval
== EXCEPTION_EXECUTE_HANDLER
)
924 /* Unwind all higher frames, this one will handle the exception */
925 _global_unwind2((EXCEPTION_REGISTRATION_RECORD
*)frame
);
926 msvcrt_local_unwind2(frame
, trylevel
, &frame
->_ebp
);
928 /* Set our trylevel to the enclosing block, and call the __finally
929 * code, which won't return
931 frame
->trylevel
= pScopeTable
[trylevel
].previousTryLevel
;
932 TRACE("__finally block %p\n",pScopeTable
[trylevel
].lpfnHandler
);
933 call_finally_block(pScopeTable
[trylevel
].lpfnHandler
, &frame
->_ebp
);
934 ERR("Returned from __finally block - expect crash!\n");
937 trylevel
= pScopeTable
[trylevel
].previousTryLevel
;
940 TRACE("reached TRYLEVEL_END, returning ExceptionContinueSearch\n");
941 return ExceptionContinueSearch
;
944 /*********************************************************************
945 * _except_handler4_common (MSVCRT.@)
947 int CDECL
_except_handler4_common( ULONG
*cookie
, void (*check_cookie
)(void),
948 EXCEPTION_RECORD
*rec
, MSVCRT_EXCEPTION_FRAME
*frame
,
949 CONTEXT
*context
, EXCEPTION_REGISTRATION_RECORD
**dispatcher
)
951 int retval
, trylevel
;
952 EXCEPTION_POINTERS exceptPtrs
;
953 const SCOPETABLE_V4
*scope_table
= get_scopetable_v4( frame
, *cookie
);
955 TRACE( "exception %x flags=%x at %p handler=%p %p %p cookie=%x scope table=%p cookies=%d/%x,%d/%x\n",
956 rec
->ExceptionCode
, rec
->ExceptionFlags
, rec
->ExceptionAddress
,
957 frame
->handler
, context
, dispatcher
, *cookie
, scope_table
,
958 scope_table
->gs_cookie_offset
, scope_table
->gs_cookie_xor
,
959 scope_table
->eh_cookie_offset
, scope_table
->eh_cookie_xor
);
961 /* FIXME: no cookie validation yet */
963 if (rec
->ExceptionFlags
& (EH_UNWINDING
| EH_EXIT_UNWIND
))
965 /* Unwinding the current frame */
966 msvcrt_local_unwind4( cookie
, frame
, -2, &frame
->_ebp
);
967 TRACE("unwound current frame, returning ExceptionContinueSearch\n");
968 return ExceptionContinueSearch
;
972 /* Hunting for handler */
973 exceptPtrs
.ExceptionRecord
= rec
;
974 exceptPtrs
.ContextRecord
= context
;
975 *((DWORD
*)frame
-1) = (DWORD
)&exceptPtrs
;
976 trylevel
= frame
->trylevel
;
978 while (trylevel
!= -2)
980 TRACE( "level %d prev %d filter %p\n", trylevel
,
981 scope_table
->entries
[trylevel
].previousTryLevel
,
982 scope_table
->entries
[trylevel
].lpfnFilter
);
983 if (scope_table
->entries
[trylevel
].lpfnFilter
)
985 retval
= call_filter( scope_table
->entries
[trylevel
].lpfnFilter
, &exceptPtrs
, &frame
->_ebp
);
987 TRACE("filter returned %s\n", retval
== EXCEPTION_CONTINUE_EXECUTION
?
988 "CONTINUE_EXECUTION" : retval
== EXCEPTION_EXECUTE_HANDLER
?
989 "EXECUTE_HANDLER" : "CONTINUE_SEARCH");
991 if (retval
== EXCEPTION_CONTINUE_EXECUTION
)
992 return ExceptionContinueExecution
;
994 if (retval
== EXCEPTION_EXECUTE_HANDLER
)
996 __DestructExceptionObject(rec
);
998 /* Unwind all higher frames, this one will handle the exception */
999 _global_unwind2((EXCEPTION_REGISTRATION_RECORD
*)frame
);
1000 msvcrt_local_unwind4( cookie
, frame
, trylevel
, &frame
->_ebp
);
1002 /* Set our trylevel to the enclosing block, and call the __finally
1003 * code, which won't return
1005 frame
->trylevel
= scope_table
->entries
[trylevel
].previousTryLevel
;
1006 TRACE("__finally block %p\n",scope_table
->entries
[trylevel
].lpfnHandler
);
1007 call_finally_block(scope_table
->entries
[trylevel
].lpfnHandler
, &frame
->_ebp
);
1008 ERR("Returned from __finally block - expect crash!\n");
1011 trylevel
= scope_table
->entries
[trylevel
].previousTryLevel
;
1014 TRACE("reached -2, returning ExceptionContinueSearch\n");
1015 return ExceptionContinueSearch
;
1020 * setjmp/longjmp implementation
1023 #define MSVCRT_JMP_MAGIC 0x56433230 /* ID value for new jump structure */
1024 typedef void (__stdcall
*MSVCRT_unwind_function
)(const struct MSVCRT___JUMP_BUFFER
*);
1026 /* define an entrypoint for setjmp/setjmp3 that stores the registers in the jmp buf */
1027 /* and then jumps to the C backend function */
1028 #define DEFINE_SETJMP_ENTRYPOINT(name) \
1029 __ASM_GLOBAL_FUNC( name, \
1030 "movl 4(%esp),%ecx\n\t" /* jmp_buf */ \
1031 "movl %ebp,0(%ecx)\n\t" /* jmp_buf.Ebp */ \
1032 "movl %ebx,4(%ecx)\n\t" /* jmp_buf.Ebx */ \
1033 "movl %edi,8(%ecx)\n\t" /* jmp_buf.Edi */ \
1034 "movl %esi,12(%ecx)\n\t" /* jmp_buf.Esi */ \
1035 "movl %esp,16(%ecx)\n\t" /* jmp_buf.Esp */ \
1036 "movl 0(%esp),%eax\n\t" \
1037 "movl %eax,20(%ecx)\n\t" /* jmp_buf.Eip */ \
1038 "jmp " __ASM_NAME("__regs_") # name )
1040 /* restore the registers from the jmp buf upon longjmp */
1041 extern void DECLSPEC_NORETURN
longjmp_set_regs( struct MSVCRT___JUMP_BUFFER
*jmp
, int retval
);
1042 __ASM_GLOBAL_FUNC( longjmp_set_regs
,
1043 "movl 4(%esp),%ecx\n\t" /* jmp_buf */
1044 "movl 8(%esp),%eax\n\t" /* retval */
1045 "movl 0(%ecx),%ebp\n\t" /* jmp_buf.Ebp */
1046 "movl 4(%ecx),%ebx\n\t" /* jmp_buf.Ebx */
1047 "movl 8(%ecx),%edi\n\t" /* jmp_buf.Edi */
1048 "movl 12(%ecx),%esi\n\t" /* jmp_buf.Esi */
1049 "movl 16(%ecx),%esp\n\t" /* jmp_buf.Esp */
1050 "addl $4,%esp\n\t" /* get rid of return address */
1051 "jmp *20(%ecx)\n\t" /* jmp_buf.Eip */ )
1054 * The signatures of the setjmp/longjmp functions do not match that
1055 * declared in the setjmp header so they don't follow the regular naming
1056 * convention to avoid conflicts.
1059 /*******************************************************************
1060 * _setjmp (MSVCRT.@)
1062 DEFINE_SETJMP_ENTRYPOINT(MSVCRT__setjmp
)
1063 int CDECL DECLSPEC_HIDDEN
__regs_MSVCRT__setjmp(struct MSVCRT___JUMP_BUFFER
*jmp
)
1065 jmp
->Registration
= (unsigned long)NtCurrentTeb()->Tib
.ExceptionList
;
1066 if (jmp
->Registration
== ~0UL)
1067 jmp
->TryLevel
= TRYLEVEL_END
;
1069 jmp
->TryLevel
= ((MSVCRT_EXCEPTION_FRAME
*)jmp
->Registration
)->trylevel
;
1071 TRACE("buf=%p ebx=%08lx esi=%08lx edi=%08lx ebp=%08lx esp=%08lx eip=%08lx frame=%08lx\n",
1072 jmp
, jmp
->Ebx
, jmp
->Esi
, jmp
->Edi
, jmp
->Ebp
, jmp
->Esp
, jmp
->Eip
, jmp
->Registration
);
1076 /*******************************************************************
1077 * _setjmp3 (MSVCRT.@)
1079 DEFINE_SETJMP_ENTRYPOINT( MSVCRT__setjmp3
)
1080 int WINAPIV DECLSPEC_HIDDEN
__regs_MSVCRT__setjmp3(struct MSVCRT___JUMP_BUFFER
*jmp
, int nb_args
, ...)
1082 jmp
->Cookie
= MSVCRT_JMP_MAGIC
;
1083 jmp
->UnwindFunc
= 0;
1084 jmp
->Registration
= (unsigned long)NtCurrentTeb()->Tib
.ExceptionList
;
1085 if (jmp
->Registration
== ~0UL)
1087 jmp
->TryLevel
= TRYLEVEL_END
;
1094 va_start( args
, nb_args
);
1095 if (nb_args
> 0) jmp
->UnwindFunc
= va_arg( args
, unsigned long );
1096 if (nb_args
> 1) jmp
->TryLevel
= va_arg( args
, unsigned long );
1097 else jmp
->TryLevel
= ((MSVCRT_EXCEPTION_FRAME
*)jmp
->Registration
)->trylevel
;
1098 for (i
= 0; i
< 6 && i
< nb_args
- 2; i
++)
1099 jmp
->UnwindData
[i
] = va_arg( args
, unsigned long );
1103 TRACE("buf=%p ebx=%08lx esi=%08lx edi=%08lx ebp=%08lx esp=%08lx eip=%08lx frame=%08lx\n",
1104 jmp
, jmp
->Ebx
, jmp
->Esi
, jmp
->Edi
, jmp
->Ebp
, jmp
->Esp
, jmp
->Eip
, jmp
->Registration
);
1108 /*********************************************************************
1109 * longjmp (MSVCRT.@)
1111 void CDECL
MSVCRT_longjmp(struct MSVCRT___JUMP_BUFFER
*jmp
, int retval
)
1113 unsigned long cur_frame
= 0;
1115 TRACE("buf=%p ebx=%08lx esi=%08lx edi=%08lx ebp=%08lx esp=%08lx eip=%08lx frame=%08lx retval=%08x\n",
1116 jmp
, jmp
->Ebx
, jmp
->Esi
, jmp
->Edi
, jmp
->Ebp
, jmp
->Esp
, jmp
->Eip
, jmp
->Registration
, retval
);
1118 cur_frame
=(unsigned long)NtCurrentTeb()->Tib
.ExceptionList
;
1119 TRACE("cur_frame=%lx\n",cur_frame
);
1121 if (cur_frame
!= jmp
->Registration
)
1122 _global_unwind2((EXCEPTION_REGISTRATION_RECORD
*)jmp
->Registration
);
1124 if (jmp
->Registration
)
1126 if (IsBadReadPtr(&jmp
->Cookie
, sizeof(long)) || jmp
->Cookie
!= MSVCRT_JMP_MAGIC
)
1128 msvcrt_local_unwind2((MSVCRT_EXCEPTION_FRAME
*)jmp
->Registration
,
1129 jmp
->TryLevel
, (void *)jmp
->Ebp
);
1131 else if(jmp
->UnwindFunc
)
1133 MSVCRT_unwind_function unwind_func
;
1135 unwind_func
=(MSVCRT_unwind_function
)jmp
->UnwindFunc
;
1143 longjmp_set_regs( jmp
, retval
);
1146 /*********************************************************************
1147 * _seh_longjmp_unwind (MSVCRT.@)
1149 void __stdcall
_seh_longjmp_unwind(struct MSVCRT___JUMP_BUFFER
*jmp
)
1151 msvcrt_local_unwind2( (MSVCRT_EXCEPTION_FRAME
*)jmp
->Registration
, jmp
->TryLevel
, (void *)jmp
->Ebp
);
1154 /*********************************************************************
1155 * _seh_longjmp_unwind4 (MSVCRT.@)
1157 void __stdcall
_seh_longjmp_unwind4(struct MSVCRT___JUMP_BUFFER
*jmp
)
1159 msvcrt_local_unwind4( (ULONG
*)&jmp
->Cookie
, (MSVCRT_EXCEPTION_FRAME
*)jmp
->Registration
,
1160 jmp
->TryLevel
, (void *)jmp
->Ebp
);
1163 /*********************************************************************
1164 * _fpieee_flt (MSVCRT.@)
1166 int __cdecl
_fpieee_flt(ULONG exception_code
, EXCEPTION_POINTERS
*ep
,
1167 int (__cdecl
*handler
)(_FPIEEE_RECORD
*))
1169 FLOATING_SAVE_AREA
*ctx
= &ep
->ContextRecord
->FloatSave
;
1173 TRACE("(%x %p %p)\n", exception_code
, ep
, handler
);
1175 switch(exception_code
) {
1176 case STATUS_FLOAT_DIVIDE_BY_ZERO
:
1177 case STATUS_FLOAT_INEXACT_RESULT
:
1178 case STATUS_FLOAT_INVALID_OPERATION
:
1179 case STATUS_FLOAT_OVERFLOW
:
1180 case STATUS_FLOAT_UNDERFLOW
:
1183 return EXCEPTION_CONTINUE_SEARCH
;
1186 memset(&rec
, 0, sizeof(rec
));
1187 rec
.RoundingMode
= ctx
->ControlWord
>> 10;
1188 switch((ctx
->ControlWord
>> 8) & 0x3) {
1189 case 0: rec
.Precision
= 2; break;
1190 case 1: rec
.Precision
= 3; break;
1191 case 2: rec
.Precision
= 1; break;
1192 case 3: rec
.Precision
= 0; break;
1194 rec
.Status
.InvalidOperation
= ctx
->StatusWord
& 0x1;
1195 rec
.Status
.ZeroDivide
= ((ctx
->StatusWord
& 0x4) != 0);
1196 rec
.Status
.Overflow
= ((ctx
->StatusWord
& 0x8) != 0);
1197 rec
.Status
.Underflow
= ((ctx
->StatusWord
& 0x10) != 0);
1198 rec
.Status
.Inexact
= ((ctx
->StatusWord
& 0x20) != 0);
1199 rec
.Enable
.InvalidOperation
= ((ctx
->ControlWord
& 0x1) == 0);
1200 rec
.Enable
.ZeroDivide
= ((ctx
->ControlWord
& 0x4) == 0);
1201 rec
.Enable
.Overflow
= ((ctx
->ControlWord
& 0x8) == 0);
1202 rec
.Enable
.Underflow
= ((ctx
->ControlWord
& 0x10) == 0);
1203 rec
.Enable
.Inexact
= ((ctx
->ControlWord
& 0x20) == 0);
1204 rec
.Cause
.InvalidOperation
= rec
.Enable
.InvalidOperation
& rec
.Status
.InvalidOperation
;
1205 rec
.Cause
.ZeroDivide
= rec
.Enable
.ZeroDivide
& rec
.Status
.ZeroDivide
;
1206 rec
.Cause
.Overflow
= rec
.Enable
.Overflow
& rec
.Status
.Overflow
;
1207 rec
.Cause
.Underflow
= rec
.Enable
.Underflow
& rec
.Status
.Underflow
;
1208 rec
.Cause
.Inexact
= rec
.Enable
.Inexact
& rec
.Status
.Inexact
;
1210 TRACE("opcode: %x\n", *(ULONG
*)ep
->ContextRecord
->FloatSave
.ErrorOffset
);
1212 if(*(WORD
*)ctx
->ErrorOffset
== 0x35dc) { /* fdiv m64fp */
1213 if(exception_code
==STATUS_FLOAT_DIVIDE_BY_ZERO
|| exception_code
==STATUS_FLOAT_INVALID_OPERATION
) {
1214 rec
.Operand1
.OperandValid
= 1;
1215 rec
.Result
.OperandValid
= 0;
1217 rec
.Operand1
.OperandValid
= 0;
1218 rec
.Result
.OperandValid
= 1;
1220 rec
.Operand2
.OperandValid
= 1;
1221 rec
.Operation
= _FpCodeDivide
;
1222 rec
.Operand1
.Format
= _FpFormatFp80
;
1223 memcpy(&rec
.Operand1
.Value
.Fp80Value
, ctx
->RegisterArea
, sizeof(rec
.Operand1
.Value
.Fp80Value
));
1224 rec
.Operand2
.Format
= _FpFormatFp64
;
1225 rec
.Operand2
.Value
.Fp64Value
= *(double*)ctx
->DataOffset
;
1226 rec
.Result
.Format
= _FpFormatFp80
;
1227 memcpy(&rec
.Result
.Value
.Fp80Value
, ctx
->RegisterArea
, sizeof(rec
.Operand1
.Value
.Fp80Value
));
1229 ret
= handler(&rec
);
1231 if(ret
== EXCEPTION_CONTINUE_EXECUTION
)
1232 memcpy(ctx
->RegisterArea
, &rec
.Result
.Value
.Fp80Value
, sizeof(rec
.Operand1
.Value
.Fp80Value
));
1236 FIXME("unsupported opcode: %x\n", *(ULONG
*)ep
->ContextRecord
->FloatSave
.ErrorOffset
);
1237 return EXCEPTION_CONTINUE_SEARCH
;
1240 #endif /* __i386__ */