git.oblomov.eu Git - wine/blob - dlls/msvcrt/except_i386.c

   1 /*
   2  * msvcrt C++ exception handling
   3  *
   4  * Copyright 2000 Jon Griffiths
   5  * Copyright 2002 Alexandre Julliard
   6  * Copyright 2005 Juan Lang
   7  *
   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.
  12  *
  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.
  17  *
  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
  21  *
  22  * NOTES
  23  * A good reference is the article "How a C++ compiler implements
  24  * exception handling" by Vishal Kochhar, available on
  25  * www.thecodeproject.com.
  26  */
  27
  28 #include "config.h"
  29 #include "wine/port.h"
  30
  31 #ifdef __i386__
  32
  33 #include <stdarg.h>
  34
  35 #include "windef.h"
  36 #include "winbase.h"
  37 #include "winternl.h"
  38 #include "msvcrt.h"
  39 #include "wine/exception.h"
  40 #include "excpt.h"
  41 #include "wine/debug.h"
  42
  43 #include "cppexcept.h"
  44
  45 WINE_DEFAULT_DEBUG_CHANNEL(seh);
  46
  47
  48 /* the exception frame used by CxxFrameHandler */
  49 typedef struct __cxx_exception_frame
  50 {
  51     EXCEPTION_REGISTRATION_RECORD  frame;    /* the standard exception frame */
  52     int                            trylevel;
  53     DWORD                          ebp;
  54 } cxx_exception_frame;
  55
  56 /* info about a single catch {} block */
  57 typedef struct __catchblock_info
  58 {
  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 */
  63 } catchblock_info;
  64 #define TYPE_FLAG_CONST      1
  65 #define TYPE_FLAG_VOLATILE   2
  66 #define TYPE_FLAG_REFERENCE  8
  67
  68 /* info about a single try {} block */
  69 typedef struct __tryblock_info
  70 {
  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 */
  76 } tryblock_info;
  77
  78 /* info about the unwind handler for a given trylevel */
  79 typedef struct __unwind_info
  80 {
  81     int    prev;          /* prev trylevel unwind handler, to run after this one */
  82     void (*handler)(void);/* unwind handler */
  83 } unwind_info;
  84
  85 /* descriptor of all try blocks of a given function */
  86 typedef struct __cxx_function_descr
  87 {
  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 */
  93     UINT                 ipmap_count;
  94     const void          *ipmap;
  95     const void          *expect_list;    /* expected exceptions list when magic >= VC7 */
  96     UINT                 flags;          /* flags when magic >= VC8 */
  97 } cxx_function_descr;
  98
  99 #define FUNC_DESCR_SYNCHRONOUS  1        /* synchronous exceptions only (built with /EHs) */
 100
 101 typedef struct _SCOPETABLE
 102 {
 103   int previousTryLevel;
 104   int (*lpfnFilter)(PEXCEPTION_POINTERS);
 105   int (*lpfnHandler)(void);
 106 } SCOPETABLE, *PSCOPETABLE;
 107
 108 typedef struct _MSVCRT_EXCEPTION_FRAME
 109 {
 110   EXCEPTION_REGISTRATION_RECORD *prev;
 111   void (*handler)(PEXCEPTION_RECORD, EXCEPTION_REGISTRATION_RECORD*,
 112                   PCONTEXT, PEXCEPTION_RECORD);
 113   PSCOPETABLE scopetable;
 114   int trylevel;
 115   int _ebp;
 116   PEXCEPTION_POINTERS xpointers;
 117 } MSVCRT_EXCEPTION_FRAME;
 118
 119 typedef struct
 120 {
 121   int   gs_cookie_offset;
 122   ULONG gs_cookie_xor;
 123   int   eh_cookie_offset;
 124   ULONG eh_cookie_xor;
 125   SCOPETABLE entries[1];
 126 } SCOPETABLE_V4;
 127
 128 #define TRYLEVEL_END (-1) /* End of trylevel list */
 129
 130 DWORD CDECL cxx_frame_handler( PEXCEPTION_RECORD rec, cxx_exception_frame* frame,
 131                                PCONTEXT context, EXCEPTION_REGISTRATION_RECORD** dispatch,
 132                                const cxx_function_descr *descr,
 133                                EXCEPTION_REGISTRATION_RECORD* nested_frame, int nested_trylevel );
 134
 135 /* call a function with a given ebp */
 136 static inline void *call_ebp_func( void *func, void *ebp )
 137 {
 138     void *ret;
 139     int dummy;
 140     __asm__ __volatile__ ("pushl %%ebx\n\t"
 141                           "pushl %%ebp\n\t"
 142                           "movl %4,%%ebp\n\t"
 143                           "call *%%eax\n\t"
 144                           "popl %%ebp\n\t"
 145                           "popl %%ebx"
 146                           : "=a" (ret), "=S" (dummy), "=D" (dummy)
 147                           : "0" (func), "1" (ebp) : "ecx", "edx", "memory" );
 148     return ret;
 149 }
 150
 151 /* call a copy constructor */
 152 static inline void call_copy_ctor( void *func, void *this, void *src, int has_vbase )
 153 {
 154     TRACE( "calling copy ctor %p object %p src %p\n", func, this, src );
 155     if (has_vbase)
 156         /* in that case copy ctor takes an extra bool indicating whether to copy the base class */
 157         __asm__ __volatile__("pushl $1; pushl %2; call *%0"
 158                              : : "r" (func), "c" (this), "r" (src) : "eax", "edx", "memory" );
 159     else
 160         __asm__ __volatile__("pushl %2; call *%0"
 161                              : : "r" (func), "c" (this), "r" (src) : "eax", "edx", "memory" );
 162 }
 163
 164 /* call the destructor of the exception object */
 165 static inline void call_dtor( void *func, void *object )
 166 {
 167     __asm__ __volatile__("call *%0" : : "r" (func), "c" (object) : "eax", "edx", "memory" );
 168 }
 169
 170 /* continue execution to the specified address after exception is caught */
 171 static inline void DECLSPEC_NORETURN continue_after_catch( cxx_exception_frame* frame, void *addr )
 172 {
 173     __asm__ __volatile__("movl -4(%0),%%esp; leal 12(%0),%%ebp; jmp *%1"
 174                          : : "r" (frame), "a" (addr) );
 175     for (;;) ; /* unreached */
 176 }
 177
 178 static inline void call_finally_block( void *code_block, void *base_ptr )
 179 {
 180     __asm__ __volatile__ ("movl %1,%%ebp; call *%%eax"
 181                           : : "a" (code_block), "g" (base_ptr));
 182 }
 183
 184 static inline int call_filter( int (*func)(PEXCEPTION_POINTERS), void *arg, void *ebp )
 185 {
 186     int ret;
 187     __asm__ __volatile__ ("pushl %%ebp; pushl %3; movl %2,%%ebp; call *%%eax; popl %%ebp; popl %%ebp"
 188                           : "=a" (ret)
 189                           : "0" (func), "r" (ebp), "r" (arg)
 190                           : "ecx", "edx", "memory" );
 191     return ret;
 192 }
 193
 194 static inline int call_unwind_func( int (*func)(void), void *ebp )
 195 {
 196     int ret;
 197     __asm__ __volatile__ ("pushl %%ebp\n\t"
 198                           "pushl %%ebx\n\t"
 199                           "pushl %%esi\n\t"
 200                           "pushl %%edi\n\t"
 201                           "movl %2,%%ebp\n\t"
 202                           "call *%0\n\t"
 203                           "popl %%edi\n\t"
 204                           "popl %%esi\n\t"
 205                           "popl %%ebx\n\t"
 206                           "popl %%ebp"
 207                           : "=a" (ret)
 208                           : "0" (func), "r" (ebp)
 209                           : "ecx", "edx", "memory" );
 210     return ret;
 211 }
 212
 213 static inline void dump_type( const cxx_type_info *type )
 214 {
 215     TRACE( "flags %x type %p %s offsets %d,%d,%d size %d copy ctor %p\n",
 216              type->flags, type->type_info, dbgstr_type_info(type->type_info),
 217              type->offsets.this_offset, type->offsets.vbase_descr, type->offsets.vbase_offset,
 218              type->size, type->copy_ctor );
 219 }
 220
 221 static void dump_exception_type( const cxx_exception_type *type )
 222 {
 223     UINT i;
 224
 225     TRACE( "flags %x destr %p handler %p type info %p\n",
 226              type->flags, type->destructor, type->custom_handler, type->type_info_table );
 227     for (i = 0; i < type->type_info_table->count; i++)
 228     {
 229         TRACE( "    %d: ", i );
 230         dump_type( type->type_info_table->info[i] );
 231     }
 232 }
 233
 234 static void dump_function_descr( const cxx_function_descr *descr )
 235 {
 236     UINT i;
 237     int j;
 238
 239     TRACE( "magic %x\n", descr->magic );
 240     TRACE( "unwind table: %p %d\n", descr->unwind_table, descr->unwind_count );
 241     for (i = 0; i < descr->unwind_count; i++)
 242     {
 243         TRACE( "    %d: prev %d func %p\n", i,
 244                  descr->unwind_table[i].prev, descr->unwind_table[i].handler );
 245     }
 246     TRACE( "try table: %p %d\n", descr->tryblock, descr->tryblock_count );
 247     for (i = 0; i < descr->tryblock_count; i++)
 248     {
 249         TRACE( "    %d: start %d end %d catchlevel %d catch %p %d\n", i,
 250                  descr->tryblock[i].start_level, descr->tryblock[i].end_level,
 251                  descr->tryblock[i].catch_level, descr->tryblock[i].catchblock,
 252                  descr->tryblock[i].catchblock_count );
 253         for (j = 0; j < descr->tryblock[i].catchblock_count; j++)
 254         {
 255             const catchblock_info *ptr = &descr->tryblock[i].catchblock[j];
 256             TRACE( "        %d: flags %x offset %d handler %p type %p %s\n",
 257                      j, ptr->flags, ptr->offset, ptr->handler,
 258                      ptr->type_info, dbgstr_type_info( ptr->type_info ) );
 259         }
 260     }
 261     if (descr->magic <= CXX_FRAME_MAGIC_VC6) return;
 262     TRACE( "expect list: %p\n", descr->expect_list );
 263     if (descr->magic <= CXX_FRAME_MAGIC_VC7) return;
 264     TRACE( "flags: %08x\n", descr->flags );
 265 }
 266
 267 /* check if the exception type is caught by a given catch block, and return the type that matched */
 268 static const cxx_type_info *find_caught_type( cxx_exception_type *exc_type,
 269                                               const catchblock_info *catchblock )
 270 {
 271     UINT i;
 272
 273     for (i = 0; i < exc_type->type_info_table->count; i++)
 274     {
 275         const cxx_type_info *type = exc_type->type_info_table->info[i];
 276
 277         if (!catchblock->type_info) return type;   /* catch(...) matches any type */
 278         if (catchblock->type_info != type->type_info)
 279         {
 280             if (strcmp( catchblock->type_info->mangled, type->type_info->mangled )) continue;
 281         }
 282         /* type is the same, now check the flags */
 283         if ((exc_type->flags & TYPE_FLAG_CONST) &&
 284             !(catchblock->flags & TYPE_FLAG_CONST)) continue;
 285         if ((exc_type->flags & TYPE_FLAG_VOLATILE) &&
 286             !(catchblock->flags & TYPE_FLAG_VOLATILE)) continue;
 287         return type;  /* it matched */
 288     }
 289     return NULL;
 290 }
 291
 292
 293 /* copy the exception object where the catch block wants it */
 294 static void copy_exception( void *object, cxx_exception_frame *frame,
 295                             const catchblock_info *catchblock, const cxx_type_info *type )
 296 {
 297     void **dest_ptr;
 298
 299     if (!catchblock->type_info || !catchblock->type_info->mangled[0]) return;
 300     if (!catchblock->offset) return;
 301     dest_ptr = (void **)((char *)&frame->ebp + catchblock->offset);
 302
 303     if (catchblock->flags & TYPE_FLAG_REFERENCE)
 304     {
 305         *dest_ptr = get_this_pointer( &type->offsets, object );
 306     }
 307     else if (type->flags & CLASS_IS_SIMPLE_TYPE)
 308     {
 309         memmove( dest_ptr, object, type->size );
 310         /* if it is a pointer, adjust it */
 311         if (type->size == sizeof(void *)) *dest_ptr = get_this_pointer( &type->offsets, *dest_ptr );
 312     }
 313     else  /* copy the object */
 314     {
 315         if (type->copy_ctor)
 316             call_copy_ctor( type->copy_ctor, dest_ptr, get_this_pointer(&type->offsets,object),
 317                             (type->flags & CLASS_HAS_VIRTUAL_BASE_CLASS) );
 318         else
 319             memmove( dest_ptr, get_this_pointer(&type->offsets,object), type->size );
 320     }
 321 }
 322
 323 /* unwind the local function up to a given trylevel */
 324 static void cxx_local_unwind( cxx_exception_frame* frame, const cxx_function_descr *descr, int last_level)
 325 {
 326     void (*handler)(void);
 327     int trylevel = frame->trylevel;
 328
 329     while (trylevel != last_level)
 330     {
 331         if (trylevel < 0 || trylevel >= descr->unwind_count)
 332         {
 333             ERR( "invalid trylevel %d\n", trylevel );
 334             MSVCRT_terminate();
 335         }
 336         handler = descr->unwind_table[trylevel].handler;
 337         if (handler)
 338         {
 339             TRACE( "calling unwind handler %p trylevel %d last %d ebp %p\n",
 340                    handler, trylevel, last_level, &frame->ebp );
 341             call_ebp_func( handler, &frame->ebp );
 342         }
 343         trylevel = descr->unwind_table[trylevel].prev;
 344     }
 345     frame->trylevel = last_level;
 346 }
 347
 348 /* exception frame for nested exceptions in catch block */
 349 struct catch_func_nested_frame
 350 {
 351     EXCEPTION_REGISTRATION_RECORD frame;     /* standard exception frame */
 352     EXCEPTION_RECORD             *prev_rec;  /* previous record to restore in thread data */
 353     cxx_exception_frame          *cxx_frame; /* frame of parent exception */
 354     const cxx_function_descr     *descr;     /* descriptor of parent exception */
 355     int                           trylevel;  /* current try level */
 356     EXCEPTION_RECORD             *rec;       /* rec associated with frame */
 357 };
 358
 359 /* handler for exceptions happening while calling a catch function */
 360 static DWORD catch_function_nested_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
 361                                             CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
 362 {
 363     struct catch_func_nested_frame *nested_frame = (struct catch_func_nested_frame *)frame;
 364
 365     if (rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND))
 366     {
 367         msvcrt_get_thread_data()->exc_record = nested_frame->prev_rec;
 368         return ExceptionContinueSearch;
 369     }
 370
 371     TRACE( "got nested exception in catch function\n" );
 372
 373     if(rec->ExceptionCode == CXX_EXCEPTION)
 374     {
 375         PEXCEPTION_RECORD prev_rec = nested_frame->rec;
 376         if((rec->ExceptionInformation[1] == 0 && rec->ExceptionInformation[2] == 0) ||
 377                 (rec->ExceptionInformation[1] == prev_rec->ExceptionInformation[1] &&
 378                  rec->ExceptionInformation[2] == prev_rec->ExceptionInformation[2]))
 379         {
 380             /* exception was rethrown */
 381             rec->ExceptionInformation[1] = prev_rec->ExceptionInformation[1];
 382             rec->ExceptionInformation[2] = prev_rec->ExceptionInformation[2];
 383             TRACE("detect rethrow: re-propagate: obj: %lx, type: %lx\n",
 384                     rec->ExceptionInformation[1], rec->ExceptionInformation[2]);
 385         }
 386         else if (nested_frame->prev_rec &&
 387                 nested_frame->prev_rec->ExceptionInformation[1] == prev_rec->ExceptionInformation[1] &&
 388                 nested_frame->prev_rec->ExceptionInformation[2] == prev_rec->ExceptionInformation[2])
 389         {
 390             TRACE("detect threw new exception in catch block - not owning old(obj: %lx type: %lx)\n",
 391                     prev_rec->ExceptionInformation[1], prev_rec->ExceptionInformation[2]);
 392         }
 393         else {
 394             /* new exception in exception handler, destroy old */
 395             void *object = (void*)prev_rec->ExceptionInformation[1];
 396             cxx_exception_type *info = (cxx_exception_type*) prev_rec->ExceptionInformation[2];
 397             TRACE("detect threw new exception in catch block - destroy old(obj: %p type: %p)\n",
 398                     object, info);
 399             if(info && info->destructor)
 400                 call_dtor( info->destructor, object );
 401         }
 402     }
 403
 404     return cxx_frame_handler( rec, nested_frame->cxx_frame, context,
 405                               NULL, nested_frame->descr, &nested_frame->frame,
 406                               nested_frame->trylevel );
 407 }
 408
 409 /* find and call the appropriate catch block for an exception */
 410 /* returns the address to continue execution to after the catch block was called */
 411 static inline void call_catch_block( PEXCEPTION_RECORD rec, cxx_exception_frame *frame,
 412                                      const cxx_function_descr *descr, int nested_trylevel,
 413                                      cxx_exception_type *info )
 414 {
 415     UINT i;
 416     int j;
 417     void *addr, *object = (void *)rec->ExceptionInformation[1];
 418     struct catch_func_nested_frame nested_frame;
 419     int trylevel = frame->trylevel;
 420     thread_data_t *thread_data = msvcrt_get_thread_data();
 421     DWORD save_esp = ((DWORD*)frame)[-1];
 422
 423     for (i = 0; i < descr->tryblock_count; i++)
 424     {
 425         const tryblock_info *tryblock = &descr->tryblock[i];
 426
 427         if (trylevel < tryblock->start_level) continue;
 428         if (trylevel > tryblock->end_level) continue;
 429
 430         /* got a try block */
 431         for (j = 0; j < tryblock->catchblock_count; j++)
 432         {
 433             const catchblock_info *catchblock = &tryblock->catchblock[j];
 434             if(info)
 435             {
 436                 const cxx_type_info *type = find_caught_type( info, catchblock );
 437                 if (!type) continue;
 438
 439                 TRACE( "matched type %p in tryblock %d catchblock %d\n", type, i, j );
 440
 441                 /* copy the exception to its destination on the stack */
 442                 copy_exception( object, frame, catchblock, type );
 443             }
 444             else
 445             {
 446                 /* no CXX_EXCEPTION only proceed with a catch(...) block*/
 447                 if(catchblock->type_info)
 448                     continue;
 449                 TRACE("found catch(...) block\n");
 450             }
 451
 452             /* unwind the stack */
 453             RtlUnwind( frame, 0, rec, 0 );
 454             cxx_local_unwind( frame, descr, tryblock->start_level );
 455             frame->trylevel = tryblock->end_level + 1;
 456
 457             /* call the catch block */
 458             TRACE( "calling catch block %p addr %p ebp %p\n",
 459                    catchblock, catchblock->handler, &frame->ebp );
 460
 461             /* setup an exception block for nested exceptions */
 462
 463             nested_frame.frame.Handler = catch_function_nested_handler;
 464             nested_frame.prev_rec  = thread_data->exc_record;
 465             nested_frame.cxx_frame = frame;
 466             nested_frame.descr     = descr;
 467             nested_frame.trylevel  = nested_trylevel + 1;
 468             nested_frame.rec = rec;
 469
 470             __wine_push_frame( &nested_frame.frame );
 471             thread_data->exc_record = rec;
 472             addr = call_ebp_func( catchblock->handler, &frame->ebp );
 473             thread_data->exc_record = nested_frame.prev_rec;
 474             __wine_pop_frame( &nested_frame.frame );
 475
 476             ((DWORD*)frame)[-1] = save_esp;
 477             if (info && info->destructor) call_dtor( info->destructor, object );
 478             TRACE( "done, continuing at %p\n", addr );
 479
 480             continue_after_catch( frame, addr );
 481         }
 482     }
 483 }
 484
 485
 486 /*********************************************************************
 487  *              cxx_frame_handler
 488  *
 489  * Implementation of __CxxFrameHandler.
 490  */
 491 DWORD CDECL cxx_frame_handler( PEXCEPTION_RECORD rec, cxx_exception_frame* frame,
 492                                PCONTEXT context, EXCEPTION_REGISTRATION_RECORD** dispatch,
 493                                const cxx_function_descr *descr,
 494                                EXCEPTION_REGISTRATION_RECORD* nested_frame,
 495                                int nested_trylevel )
 496 {
 497     cxx_exception_type *exc_type;
 498
 499     if (descr->magic < CXX_FRAME_MAGIC_VC6 || descr->magic > CXX_FRAME_MAGIC_VC8)
 500     {
 501         ERR( "invalid frame magic %x\n", descr->magic );
 502         return ExceptionContinueSearch;
 503     }
 504     if (descr->magic >= CXX_FRAME_MAGIC_VC8 &&
 505         (descr->flags & FUNC_DESCR_SYNCHRONOUS) &&
 506         (rec->ExceptionCode != CXX_EXCEPTION))
 507         return ExceptionContinueSearch;  /* handle only c++ exceptions */
 508
 509     if (rec->ExceptionFlags & (EH_UNWINDING|EH_EXIT_UNWIND))
 510     {
 511         if (descr->unwind_count && !nested_trylevel) cxx_local_unwind( frame, descr, -1 );
 512         return ExceptionContinueSearch;
 513     }
 514     if (!descr->tryblock_count) return ExceptionContinueSearch;
 515
 516     if(rec->ExceptionCode == CXX_EXCEPTION)
 517     {
 518         if (rec->ExceptionInformation[1] == 0 && rec->ExceptionInformation[2] == 0)
 519         {
 520             EXCEPTION_RECORD *exc_record = msvcrt_get_thread_data()->exc_record;
 521             rec->ExceptionInformation[1] = exc_record->ExceptionInformation[1];
 522             rec->ExceptionInformation[2] = exc_record->ExceptionInformation[2];
 523             TRACE("detect rethrow: obj: %lx, type: %lx\n",
 524                     rec->ExceptionInformation[1], rec->ExceptionInformation[2]);
 525         }
 526
 527         exc_type = (cxx_exception_type *)rec->ExceptionInformation[2];
 528
 529         if (rec->ExceptionInformation[0] > CXX_FRAME_MAGIC_VC8 &&
 530                 exc_type->custom_handler)
 531         {
 532             return exc_type->custom_handler( rec, frame, context, dispatch,
 533                                          descr, nested_trylevel, nested_frame, 0 );
 534         }
 535
 536         if (TRACE_ON(seh))
 537         {
 538             TRACE("handling C++ exception rec %p frame %p trylevel %d descr %p nested_frame %p\n",
 539                   rec, frame, frame->trylevel, descr, nested_frame );
 540             dump_exception_type( exc_type );
 541             dump_function_descr( descr );
 542         }
 543     }
 544     else
 545     {
 546         exc_type = NULL;
 547         TRACE("handling C exception code %x  rec %p frame %p trylevel %d descr %p nested_frame %p\n",
 548               rec->ExceptionCode,  rec, frame, frame->trylevel, descr, nested_frame );
 549     }
 550
 551     call_catch_block( rec, frame, descr, frame->trylevel, exc_type );
 552     return ExceptionContinueSearch;
 553 }
 554
 555
 556 /*********************************************************************
 557  *              __CxxFrameHandler (MSVCRT.@)
 558  */
 559 extern DWORD CDECL __CxxFrameHandler( PEXCEPTION_RECORD rec, EXCEPTION_REGISTRATION_RECORD* frame,
 560                                       PCONTEXT context, EXCEPTION_REGISTRATION_RECORD** dispatch );
 561 __ASM_GLOBAL_FUNC( __CxxFrameHandler,
 562                    "pushl $0\n\t"        /* nested_trylevel */
 563                    __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
 564                    "pushl $0\n\t"        /* nested_frame */
 565                    __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
 566                    "pushl %eax\n\t"      /* descr */
 567                    __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
 568                    "pushl 28(%esp)\n\t"  /* dispatch */
 569                    __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
 570                    "pushl 28(%esp)\n\t"  /* context */
 571                    __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
 572                    "pushl 28(%esp)\n\t"  /* frame */
 573                    __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
 574                    "pushl 28(%esp)\n\t"  /* rec */
 575                    __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
 576                    "call " __ASM_NAME("cxx_frame_handler") "\n\t"
 577                    "add $28,%esp\n\t"
 578                    __ASM_CFI(".cfi_adjust_cfa_offset -28\n\t")
 579                    "ret" )
 580
 581
 582 /*********************************************************************
 583  *              __CxxLongjmpUnwind (MSVCRT.@)
 584  *
 585  * Callback meant to be used as UnwindFunc for setjmp/longjmp.
 586  */
 587 void __stdcall __CxxLongjmpUnwind( const struct MSVCRT___JUMP_BUFFER *buf )
 588 {
 589     cxx_exception_frame *frame = (cxx_exception_frame *)buf->Registration;
 590     const cxx_function_descr *descr = (const cxx_function_descr *)buf->UnwindData[0];
 591
 592     TRACE( "unwinding frame %p descr %p trylevel %ld\n", frame, descr, buf->TryLevel );
 593     cxx_local_unwind( frame, descr, buf->TryLevel );
 594 }
 595
 596 /*********************************************************************
 597  *              __CppXcptFilter (MSVCRT.@)
 598  */
 599 int CDECL __CppXcptFilter(NTSTATUS ex, PEXCEPTION_POINTERS ptr)
 600 {
 601     /* only filter c++ exceptions */
 602     if (ex != CXX_EXCEPTION) return EXCEPTION_CONTINUE_SEARCH;
 603     return _XcptFilter( ex, ptr );
 604 }
 605
 606 /*********************************************************************
 607  *              __CxxDetectRethrow (MSVCRT.@)
 608  */
 609 BOOL CDECL __CxxDetectRethrow(PEXCEPTION_POINTERS ptrs)
 610 {
 611   PEXCEPTION_RECORD rec;
 612
 613   if (!ptrs)
 614     return FALSE;
 615
 616   rec = ptrs->ExceptionRecord;
 617
 618   if (rec->ExceptionCode == CXX_EXCEPTION &&
 619       rec->NumberParameters == 3 &&
 620       rec->ExceptionInformation[0] == CXX_FRAME_MAGIC_VC6 &&
 621       rec->ExceptionInformation[2])
 622   {
 623     ptrs->ExceptionRecord = msvcrt_get_thread_data()->exc_record;
 624     return TRUE;
 625   }
 626   return (msvcrt_get_thread_data()->exc_record == rec);
 627 }
 628
 629 /*********************************************************************
 630  *              __CxxQueryExceptionSize (MSVCRT.@)
 631  */
 632 unsigned int CDECL __CxxQueryExceptionSize(void)
 633 {
 634   return sizeof(cxx_exception_type);
 635 }
 636
 637
 638 /*********************************************************************
 639  *              _EH_prolog (MSVCRT.@)
 640  */
 641
 642 /* Provided for VC++ binary compatibility only */
 643 __ASM_GLOBAL_FUNC(_EH_prolog,
 644                   __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")  /* skip ret addr */
 645                   "pushl $-1\n\t"
 646                   __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
 647                   "pushl %eax\n\t"
 648                   __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
 649                   "pushl %fs:0\n\t"
 650                   __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
 651                   "movl  %esp, %fs:0\n\t"
 652                   "movl  12(%esp), %eax\n\t"
 653                   "movl  %ebp, 12(%esp)\n\t"
 654                   "leal  12(%esp), %ebp\n\t"
 655                   "pushl %eax\n\t"
 656                   __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
 657                   "ret")
 658
 659 static const SCOPETABLE_V4 *get_scopetable_v4( MSVCRT_EXCEPTION_FRAME *frame, ULONG_PTR cookie )
 660 {
 661     return (const SCOPETABLE_V4 *)((ULONG_PTR)frame->scopetable ^ cookie);
 662 }
 663
 664 static DWORD MSVCRT_nested_handler(PEXCEPTION_RECORD rec,
 665                                    EXCEPTION_REGISTRATION_RECORD* frame,
 666                                    PCONTEXT context,
 667                                    EXCEPTION_REGISTRATION_RECORD** dispatch)
 668 {
 669   if (!(rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND)))
 670     return ExceptionContinueSearch;
 671   *dispatch = frame;
 672   return ExceptionCollidedUnwind;
 673 }
 674
 675 static void msvcrt_local_unwind2(MSVCRT_EXCEPTION_FRAME* frame, int trylevel, void *ebp)
 676 {
 677   EXCEPTION_REGISTRATION_RECORD reg;
 678
 679   TRACE("(%p,%d,%d)\n",frame, frame->trylevel, trylevel);
 680
 681   /* Register a handler in case of a nested exception */
 682   reg.Handler = MSVCRT_nested_handler;
 683   reg.Prev = NtCurrentTeb()->Tib.ExceptionList;
 684   __wine_push_frame(&reg);
 685
 686   while (frame->trylevel != TRYLEVEL_END && frame->trylevel != trylevel)
 687   {
 688       int level = frame->trylevel;
 689       frame->trylevel = frame->scopetable[level].previousTryLevel;
 690       if (!frame->scopetable[level].lpfnFilter)
 691       {
 692           TRACE( "__try block cleanup level %d handler %p ebp %p\n",
 693                  level, frame->scopetable[level].lpfnHandler, ebp );
 694           call_unwind_func( frame->scopetable[level].lpfnHandler, ebp );
 695       }
 696   }
 697   __wine_pop_frame(&reg);
 698   TRACE("unwound OK\n");
 699 }
 700
 701 static void msvcrt_local_unwind4( ULONG *cookie, MSVCRT_EXCEPTION_FRAME* frame, int trylevel, void *ebp )
 702 {
 703     EXCEPTION_REGISTRATION_RECORD reg;
 704     const SCOPETABLE_V4 *scopetable = get_scopetable_v4( frame, *cookie );
 705
 706     TRACE("(%p,%d,%d)\n",frame, frame->trylevel, trylevel);
 707
 708     /* Register a handler in case of a nested exception */
 709     reg.Handler = MSVCRT_nested_handler;
 710     reg.Prev = NtCurrentTeb()->Tib.ExceptionList;
 711     __wine_push_frame(&reg);
 712
 713     while (frame->trylevel != -2 && frame->trylevel != trylevel)
 714     {
 715         int level = frame->trylevel;
 716         frame->trylevel = scopetable->entries[level].previousTryLevel;
 717         if (!scopetable->entries[level].lpfnFilter)
 718         {
 719             TRACE( "__try block cleanup level %d handler %p ebp %p\n",
 720                    level, scopetable->entries[level].lpfnHandler, ebp );
 721             call_unwind_func( scopetable->entries[level].lpfnHandler, ebp );
 722         }
 723     }
 724     __wine_pop_frame(&reg);
 725     TRACE("unwound OK\n");
 726 }
 727
 728 /*******************************************************************
 729  *              _local_unwind2 (MSVCRT.@)
 730  */
 731 void CDECL _local_unwind2(MSVCRT_EXCEPTION_FRAME* frame, int trylevel)
 732 {
 733     msvcrt_local_unwind2( frame, trylevel, &frame->_ebp );
 734 }
 735
 736 /*******************************************************************
 737  *              _local_unwind4 (MSVCRT.@)
 738  */
 739 void CDECL _local_unwind4( ULONG *cookie, MSVCRT_EXCEPTION_FRAME* frame, int trylevel )
 740 {
 741     msvcrt_local_unwind4( cookie, frame, trylevel, &frame->_ebp );
 742 }
 743
 744 /*******************************************************************
 745  *              _global_unwind2 (MSVCRT.@)
 746  */
 747 void CDECL _global_unwind2(EXCEPTION_REGISTRATION_RECORD* frame)
 748 {
 749     TRACE("(%p)\n",frame);
 750     RtlUnwind( frame, 0, 0, 0 );
 751 }
 752
 753 /*********************************************************************
 754  *              _except_handler2 (MSVCRT.@)
 755  */
 756 int CDECL _except_handler2(PEXCEPTION_RECORD rec,
 757                            EXCEPTION_REGISTRATION_RECORD* frame,
 758                            PCONTEXT context,
 759                            EXCEPTION_REGISTRATION_RECORD** dispatcher)
 760 {
 761   FIXME("exception %x flags=%x at %p handler=%p %p %p stub\n",
 762         rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress,
 763         frame->Handler, context, dispatcher);
 764   return ExceptionContinueSearch;
 765 }
 766
 767 /*********************************************************************
 768  *              _except_handler3 (MSVCRT.@)
 769  */
 770 int CDECL _except_handler3(PEXCEPTION_RECORD rec,
 771                            MSVCRT_EXCEPTION_FRAME* frame,
 772                            PCONTEXT context, void* dispatcher)
 773 {
 774   int retval, trylevel;
 775   EXCEPTION_POINTERS exceptPtrs;
 776   PSCOPETABLE pScopeTable;
 777
 778   TRACE("exception %x flags=%x at %p handler=%p %p %p semi-stub\n",
 779         rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress,
 780         frame->handler, context, dispatcher);
 781
 782   __asm__ __volatile__ ("cld");
 783
 784   if (rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND))
 785   {
 786     /* Unwinding the current frame */
 787     msvcrt_local_unwind2(frame, TRYLEVEL_END, &frame->_ebp);
 788     TRACE("unwound current frame, returning ExceptionContinueSearch\n");
 789     return ExceptionContinueSearch;
 790   }
 791   else
 792   {
 793     /* Hunting for handler */
 794     exceptPtrs.ExceptionRecord = rec;
 795     exceptPtrs.ContextRecord = context;
 796     *((DWORD *)frame-1) = (DWORD)&exceptPtrs;
 797     trylevel = frame->trylevel;
 798     pScopeTable = frame->scopetable;
 799
 800     while (trylevel != TRYLEVEL_END)
 801     {
 802       TRACE( "level %d prev %d filter %p\n", trylevel, pScopeTable[trylevel].previousTryLevel,
 803              pScopeTable[trylevel].lpfnFilter );
 804       if (pScopeTable[trylevel].lpfnFilter)
 805       {
 806         retval = call_filter( pScopeTable[trylevel].lpfnFilter, &exceptPtrs, &frame->_ebp );
 807
 808         TRACE("filter returned %s\n", retval == EXCEPTION_CONTINUE_EXECUTION ?
 809               "CONTINUE_EXECUTION" : retval == EXCEPTION_EXECUTE_HANDLER ?
 810               "EXECUTE_HANDLER" : "CONTINUE_SEARCH");
 811
 812         if (retval == EXCEPTION_CONTINUE_EXECUTION)
 813           return ExceptionContinueExecution;
 814
 815         if (retval == EXCEPTION_EXECUTE_HANDLER)
 816         {
 817           /* Unwind all higher frames, this one will handle the exception */
 818           _global_unwind2((EXCEPTION_REGISTRATION_RECORD*)frame);
 819           msvcrt_local_unwind2(frame, trylevel, &frame->_ebp);
 820
 821           /* Set our trylevel to the enclosing block, and call the __finally
 822            * code, which won't return
 823            */
 824           frame->trylevel = pScopeTable[trylevel].previousTryLevel;
 825           TRACE("__finally block %p\n",pScopeTable[trylevel].lpfnHandler);
 826           call_finally_block(pScopeTable[trylevel].lpfnHandler, &frame->_ebp);
 827           ERR("Returned from __finally block - expect crash!\n");
 828        }
 829       }
 830       trylevel = pScopeTable[trylevel].previousTryLevel;
 831     }
 832   }
 833   TRACE("reached TRYLEVEL_END, returning ExceptionContinueSearch\n");
 834   return ExceptionContinueSearch;
 835 }
 836
 837 /*********************************************************************
 838  *              _except_handler4_common (MSVCRT.@)
 839  */
 840 int CDECL _except_handler4_common( ULONG *cookie, void (*check_cookie)(void),
 841                                    EXCEPTION_RECORD *rec, MSVCRT_EXCEPTION_FRAME *frame,
 842                                    CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
 843 {
 844     int retval, trylevel;
 845     EXCEPTION_POINTERS exceptPtrs;
 846     const SCOPETABLE_V4 *scope_table = get_scopetable_v4( frame, *cookie );
 847
 848     TRACE( "exception %x flags=%x at %p handler=%p %p %p cookie=%x scope table=%p cookies=%d/%x,%d/%x\n",
 849            rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress,
 850            frame->handler, context, dispatcher, *cookie, scope_table,
 851            scope_table->gs_cookie_offset, scope_table->gs_cookie_xor,
 852            scope_table->eh_cookie_offset, scope_table->eh_cookie_xor );
 853
 854     /* FIXME: no cookie validation yet */
 855
 856     if (rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND))
 857     {
 858         /* Unwinding the current frame */
 859         msvcrt_local_unwind4( cookie, frame, -2, &frame->_ebp );
 860         TRACE("unwound current frame, returning ExceptionContinueSearch\n");
 861         return ExceptionContinueSearch;
 862     }
 863     else
 864     {
 865         /* Hunting for handler */
 866         exceptPtrs.ExceptionRecord = rec;
 867         exceptPtrs.ContextRecord = context;
 868         *((DWORD *)frame-1) = (DWORD)&exceptPtrs;
 869         trylevel = frame->trylevel;
 870
 871         while (trylevel != -2)
 872         {
 873             TRACE( "level %d prev %d filter %p\n", trylevel,
 874                    scope_table->entries[trylevel].previousTryLevel,
 875                    scope_table->entries[trylevel].lpfnFilter );
 876             if (scope_table->entries[trylevel].lpfnFilter)
 877             {
 878                 retval = call_filter( scope_table->entries[trylevel].lpfnFilter, &exceptPtrs, &frame->_ebp );
 879
 880                 TRACE("filter returned %s\n", retval == EXCEPTION_CONTINUE_EXECUTION ?
 881                       "CONTINUE_EXECUTION" : retval == EXCEPTION_EXECUTE_HANDLER ?
 882                       "EXECUTE_HANDLER" : "CONTINUE_SEARCH");
 883
 884                 if (retval == EXCEPTION_CONTINUE_EXECUTION)
 885                     return ExceptionContinueExecution;
 886
 887                 if (retval == EXCEPTION_EXECUTE_HANDLER)
 888                 {
 889                     /* Unwind all higher frames, this one will handle the exception */
 890                     _global_unwind2((EXCEPTION_REGISTRATION_RECORD*)frame);
 891                     msvcrt_local_unwind4( cookie, frame, trylevel, &frame->_ebp );
 892
 893                     /* Set our trylevel to the enclosing block, and call the __finally
 894                      * code, which won't return
 895                      */
 896                     frame->trylevel = scope_table->entries[trylevel].previousTryLevel;
 897                     TRACE("__finally block %p\n",scope_table->entries[trylevel].lpfnHandler);
 898                     call_finally_block(scope_table->entries[trylevel].lpfnHandler, &frame->_ebp);
 899                     ERR("Returned from __finally block - expect crash!\n");
 900                 }
 901             }
 902             trylevel = scope_table->entries[trylevel].previousTryLevel;
 903         }
 904     }
 905     TRACE("reached -2, returning ExceptionContinueSearch\n");
 906     return ExceptionContinueSearch;
 907 }
 908
 909
 910 /*
 911  * setjmp/longjmp implementation
 912  */
 913
 914 #define MSVCRT_JMP_MAGIC 0x56433230 /* ID value for new jump structure */
 915 typedef void (__stdcall *MSVCRT_unwind_function)(const struct MSVCRT___JUMP_BUFFER *);
 916
 917 /* define an entrypoint for setjmp/setjmp3 that stores the registers in the jmp buf */
 918 /* and then jumps to the C backend function */
 919 #define DEFINE_SETJMP_ENTRYPOINT(name) \
 920     __ASM_GLOBAL_FUNC( name, \
 921                        "movl 4(%esp),%ecx\n\t"   /* jmp_buf */      \
 922                        "movl %ebp,0(%ecx)\n\t"   /* jmp_buf.Ebp */  \
 923                        "movl %ebx,4(%ecx)\n\t"   /* jmp_buf.Ebx */  \
 924                        "movl %edi,8(%ecx)\n\t"   /* jmp_buf.Edi */  \
 925                        "movl %esi,12(%ecx)\n\t"  /* jmp_buf.Esi */  \
 926                        "movl %esp,16(%ecx)\n\t"  /* jmp_buf.Esp */  \
 927                        "movl 0(%esp),%eax\n\t"                      \
 928                        "movl %eax,20(%ecx)\n\t"  /* jmp_buf.Eip */  \
 929                        "jmp " __ASM_NAME("__regs_") # name )
 930
 931 /* restore the registers from the jmp buf upon longjmp */
 932 extern void DECLSPEC_NORETURN longjmp_set_regs( struct MSVCRT___JUMP_BUFFER *jmp, int retval );
 933 __ASM_GLOBAL_FUNC( longjmp_set_regs,
 934                    "movl 4(%esp),%ecx\n\t"   /* jmp_buf */
 935                    "movl 8(%esp),%eax\n\t"   /* retval */
 936                    "movl 0(%ecx),%ebp\n\t"   /* jmp_buf.Ebp */
 937                    "movl 4(%ecx),%ebx\n\t"   /* jmp_buf.Ebx */
 938                    "movl 8(%ecx),%edi\n\t"   /* jmp_buf.Edi */
 939                    "movl 12(%ecx),%esi\n\t"  /* jmp_buf.Esi */
 940                    "movl 16(%ecx),%esp\n\t"  /* jmp_buf.Esp */
 941                    "addl $4,%esp\n\t"        /* get rid of return address */
 942                    "jmp *20(%ecx)\n\t"       /* jmp_buf.Eip */ )
 943
 944 /*
 945  * The signatures of the setjmp/longjmp functions do not match that
 946  * declared in the setjmp header so they don't follow the regular naming
 947  * convention to avoid conflicts.
 948  */
 949
 950 /*******************************************************************
 951  *              _setjmp (MSVCRT.@)
 952  */
 953 DEFINE_SETJMP_ENTRYPOINT(MSVCRT__setjmp)
 954 int CDECL __regs_MSVCRT__setjmp(struct MSVCRT___JUMP_BUFFER *jmp)
 955 {
 956     jmp->Registration = (unsigned long)NtCurrentTeb()->Tib.ExceptionList;
 957     if (jmp->Registration == ~0UL)
 958         jmp->TryLevel = TRYLEVEL_END;
 959     else
 960         jmp->TryLevel = ((MSVCRT_EXCEPTION_FRAME*)jmp->Registration)->trylevel;
 961
 962     TRACE("buf=%p ebx=%08lx esi=%08lx edi=%08lx ebp=%08lx esp=%08lx eip=%08lx frame=%08lx\n",
 963           jmp, jmp->Ebx, jmp->Esi, jmp->Edi, jmp->Ebp, jmp->Esp, jmp->Eip, jmp->Registration );
 964     return 0;
 965 }
 966
 967 /*******************************************************************
 968  *              _setjmp3 (MSVCRT.@)
 969  */
 970 DEFINE_SETJMP_ENTRYPOINT( MSVCRT__setjmp3 )
 971 int CDECL __regs_MSVCRT__setjmp3(struct MSVCRT___JUMP_BUFFER *jmp, int nb_args, ...)
 972 {
 973     jmp->Cookie = MSVCRT_JMP_MAGIC;
 974     jmp->UnwindFunc = 0;
 975     jmp->Registration = (unsigned long)NtCurrentTeb()->Tib.ExceptionList;
 976     if (jmp->Registration == ~0UL)
 977     {
 978         jmp->TryLevel = TRYLEVEL_END;
 979     }
 980     else
 981     {
 982         int i;
 983         va_list args;
 984
 985         va_start( args, nb_args );
 986         if (nb_args > 0) jmp->UnwindFunc = va_arg( args, unsigned long );
 987         if (nb_args > 1) jmp->TryLevel = va_arg( args, unsigned long );
 988         else jmp->TryLevel = ((MSVCRT_EXCEPTION_FRAME*)jmp->Registration)->trylevel;
 989         for (i = 0; i < 6 && i < nb_args - 2; i++)
 990             jmp->UnwindData[i] = va_arg( args, unsigned long );
 991         va_end( args );
 992     }
 993
 994     TRACE("buf=%p ebx=%08lx esi=%08lx edi=%08lx ebp=%08lx esp=%08lx eip=%08lx frame=%08lx\n",
 995           jmp, jmp->Ebx, jmp->Esi, jmp->Edi, jmp->Ebp, jmp->Esp, jmp->Eip, jmp->Registration );
 996     return 0;
 997 }
 998
 999 /*********************************************************************
1000  *              longjmp (MSVCRT.@)
1001  */
1002 void CDECL MSVCRT_longjmp(struct MSVCRT___JUMP_BUFFER *jmp, int retval)
1003 {
1004     unsigned long cur_frame = 0;
1005
1006     TRACE("buf=%p ebx=%08lx esi=%08lx edi=%08lx ebp=%08lx esp=%08lx eip=%08lx frame=%08lx retval=%08x\n",
1007           jmp, jmp->Ebx, jmp->Esi, jmp->Edi, jmp->Ebp, jmp->Esp, jmp->Eip, jmp->Registration, retval );
1008
1009     cur_frame=(unsigned long)NtCurrentTeb()->Tib.ExceptionList;
1010     TRACE("cur_frame=%lx\n",cur_frame);
1011
1012     if (cur_frame != jmp->Registration)
1013         _global_unwind2((EXCEPTION_REGISTRATION_RECORD*)jmp->Registration);
1014
1015     if (jmp->Registration)
1016     {
1017         if (!IsBadReadPtr(&jmp->Cookie, sizeof(long)) &&
1018             jmp->Cookie == MSVCRT_JMP_MAGIC && jmp->UnwindFunc)
1019         {
1020             MSVCRT_unwind_function unwind_func;
1021
1022             unwind_func=(MSVCRT_unwind_function)jmp->UnwindFunc;
1023             unwind_func(jmp);
1024         }
1025         else
1026             msvcrt_local_unwind2((MSVCRT_EXCEPTION_FRAME*)jmp->Registration,
1027                                  jmp->TryLevel, (void *)jmp->Ebp);
1028     }
1029
1030     if (!retval)
1031         retval = 1;
1032
1033     longjmp_set_regs( jmp, retval );
1034 }
1035
1036 /*********************************************************************
1037  *              _seh_longjmp_unwind (MSVCRT.@)
1038  */
1039 void __stdcall _seh_longjmp_unwind(struct MSVCRT___JUMP_BUFFER *jmp)
1040 {
1041     msvcrt_local_unwind2( (MSVCRT_EXCEPTION_FRAME *)jmp->Registration, jmp->TryLevel, (void *)jmp->Ebp );
1042 }
1043
1044 /*********************************************************************
1045  *              _seh_longjmp_unwind4 (MSVCRT.@)
1046  */
1047 void __stdcall _seh_longjmp_unwind4(struct MSVCRT___JUMP_BUFFER *jmp)
1048 {
1049     msvcrt_local_unwind4( (void *)jmp->Cookie, (MSVCRT_EXCEPTION_FRAME *)jmp->Registration,
1050                           jmp->TryLevel, (void *)jmp->Ebp );
1051 }
1052
1053 #endif  /* __i386__ */