dlls/msvcrt/except_x86_64.c

   1 /*
   2  * msvcrt C++ exception handling
   3  *
   4  * Copyright 2011 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #ifdef __x86_64__
  22
  23 #include <setjmp.h>
  24 #include <stdarg.h>
  25 #include <fpieee.h>
  26
  27 #include "ntstatus.h"
  28 #define WIN32_NO_STATUS
  29 #include "windef.h"
  30 #include "winbase.h"
  31 #include "winternl.h"
  32 #include "msvcrt.h"
  33 #include "wine/exception.h"
  34 #include "excpt.h"
  35 #include "wine/debug.h"
  36
  37 #include "cppexcept.h"
  38
  39 WINE_DEFAULT_DEBUG_CHANNEL(seh);
  40
  41 typedef struct
  42 {
  43     int  prev;
  44     UINT handler;
  45 } unwind_info;
  46
  47 typedef struct
  48 {
  49     UINT flags;
  50     UINT type_info;
  51     int  offset;
  52     UINT handler;
  53     UINT frame;
  54 } catchblock_info;
  55 #define TYPE_FLAG_CONST      1
  56 #define TYPE_FLAG_VOLATILE   2
  57 #define TYPE_FLAG_REFERENCE  8
  58
  59 typedef struct
  60 {
  61     int  start_level;
  62     int  end_level;
  63     int  catch_level;
  64     int  catchblock_count;
  65     UINT catchblock;
  66 } tryblock_info;
  67
  68 typedef struct
  69 {
  70     int ip;
  71     int state;
  72 } ipmap_info;
  73
  74 typedef struct __cxx_function_descr
  75 {
  76     UINT magic;
  77     UINT unwind_count;
  78     UINT unwind_table;
  79     UINT tryblock_count;
  80     UINT tryblock;
  81     UINT ipmap_count;
  82     UINT ipmap;
  83     UINT unwind_help;
  84     UINT expect_list;
  85     UINT flags;
  86 } cxx_function_descr;
  87
  88 typedef struct
  89 {
  90     cxx_frame_info frame_info;
  91     BOOL rethrow;
  92     EXCEPTION_RECORD *prev_rec;
  93 } cxx_catch_ctx;
  94
  95 typedef struct
  96 {
  97     ULONG64 dest_frame;
  98     ULONG64 orig_frame;
  99     EXCEPTION_RECORD *seh_rec;
 100     DISPATCHER_CONTEXT *dispatch;
 101     const cxx_function_descr *descr;
 102 } se_translator_ctx;
 103
 104 static inline void* rva_to_ptr(UINT rva, ULONG64 base)
 105 {
 106     return rva ? (void*)(base+rva) : NULL;
 107 }
 108
 109 static inline void dump_type(UINT type_rva, ULONG64 base)
 110 {
 111     const cxx_type_info *type = rva_to_ptr(type_rva, base);
 112
 113     TRACE("flags %x type %x %s offsets %d,%d,%d size %d copy ctor %x(%p)\n",
 114             type->flags, type->type_info, dbgstr_type_info(rva_to_ptr(type->type_info, base)),
 115             type->offsets.this_offset, type->offsets.vbase_descr, type->offsets.vbase_offset,
 116             type->size, type->copy_ctor, rva_to_ptr(type->copy_ctor, base));
 117 }
 118
 119 static void dump_exception_type(const cxx_exception_type *type, ULONG64 base)
 120 {
 121     const cxx_type_info_table *type_info_table = rva_to_ptr(type->type_info_table, base);
 122     UINT i;
 123
 124     TRACE("flags %x destr %x(%p) handler %x(%p) type info %x(%p)\n",
 125             type->flags, type->destructor, rva_to_ptr(type->destructor, base),
 126             type->custom_handler, rva_to_ptr(type->custom_handler, base),
 127             type->type_info_table, type_info_table);
 128     for (i = 0; i < type_info_table->count; i++)
 129     {
 130         TRACE("    %d: ", i);
 131         dump_type(type_info_table->info[i], base);
 132     }
 133 }
 134
 135 static void dump_function_descr(const cxx_function_descr *descr, ULONG64 image_base)
 136 {
 137     unwind_info *unwind_table = rva_to_ptr(descr->unwind_table, image_base);
 138     tryblock_info *tryblock = rva_to_ptr(descr->tryblock, image_base);
 139     ipmap_info *ipmap = rva_to_ptr(descr->ipmap, image_base);
 140     UINT i, j;
 141
 142     TRACE("magic %x\n", descr->magic);
 143     TRACE("unwind table: %x(%p) %d\n", descr->unwind_table, unwind_table, descr->unwind_count);
 144     for (i=0; i<descr->unwind_count; i++)
 145     {
 146         TRACE("    %d: prev %d func %x(%p)\n", i, unwind_table[i].prev,
 147                 unwind_table[i].handler, rva_to_ptr(unwind_table[i].handler, image_base));
 148     }
 149     TRACE("try table: %x(%p) %d\n", descr->tryblock, tryblock, descr->tryblock_count);
 150     for (i=0; i<descr->tryblock_count; i++)
 151     {
 152         catchblock_info *catchblock = rva_to_ptr(tryblock[i].catchblock, image_base);
 153
 154         TRACE("    %d: start %d end %d catchlevel %d catch %x(%p) %d\n", i,
 155                 tryblock[i].start_level, tryblock[i].end_level,
 156                 tryblock[i].catch_level, tryblock[i].catchblock,
 157                 catchblock, tryblock[i].catchblock_count);
 158         for (j=0; j<tryblock[i].catchblock_count; j++)
 159         {
 160             TRACE("        %d: flags %x offset %d handler %x(%p) frame %x type %x %s\n",
 161                     j, catchblock[j].flags, catchblock[j].offset, catchblock[j].handler,
 162                     rva_to_ptr(catchblock[j].handler, image_base), catchblock[j].frame,
 163                     catchblock[j].type_info,
 164                     dbgstr_type_info(rva_to_ptr(catchblock[j].type_info, image_base)));
 165         }
 166     }
 167     TRACE("ipmap: %x(%p) %d\n", descr->ipmap, ipmap, descr->ipmap_count);
 168     for (i=0; i<descr->ipmap_count; i++)
 169     {
 170         TRACE("    %d: ip %x state %d\n", i, ipmap[i].ip, ipmap[i].state);
 171     }
 172     TRACE("unwind_help %d\n", descr->unwind_help);
 173     if (descr->magic <= CXX_FRAME_MAGIC_VC6) return;
 174     TRACE("expect list: %x\n", descr->expect_list);
 175     if (descr->magic <= CXX_FRAME_MAGIC_VC7) return;
 176     TRACE("flags: %08x\n", descr->flags);
 177 }
 178
 179 static inline int ip_to_state(ipmap_info *ipmap, UINT count, int ip)
 180 {
 181     UINT low = 0, high = count-1, med;
 182
 183     while (low < high) {
 184         med = low + (high-low)/2;
 185
 186         if (ipmap[med].ip <= ip && ipmap[med+1].ip > ip)
 187         {
 188             low = med;
 189             break;
 190         }
 191         if (ipmap[med].ip < ip) low = med+1;
 192         else high = med-1;
 193     }
 194
 195     TRACE("%x -> %d\n", ip, ipmap[low].state);
 196     return ipmap[low].state;
 197 }
 198
 199 /* check if the exception type is caught by a given catch block, and return the type that matched */
 200 static const cxx_type_info *find_caught_type(cxx_exception_type *exc_type, ULONG64 exc_base,
 201                                              const type_info *catch_ti, UINT catch_flags)
 202 {
 203     const cxx_type_info_table *type_info_table = rva_to_ptr(exc_type->type_info_table, exc_base);
 204     UINT i;
 205
 206     for (i = 0; i < type_info_table->count; i++)
 207     {
 208         const cxx_type_info *type = rva_to_ptr(type_info_table->info[i], exc_base);
 209         const type_info *ti = rva_to_ptr(type->type_info, exc_base);
 210
 211         if (!catch_ti) return type;   /* catch(...) matches any type */
 212         if (catch_ti != ti)
 213         {
 214             if (strcmp( catch_ti->mangled, ti->mangled )) continue;
 215         }
 216         /* type is the same, now check the flags */
 217         if ((exc_type->flags & TYPE_FLAG_CONST) &&
 218                 !(catch_flags & TYPE_FLAG_CONST)) continue;
 219         if ((exc_type->flags & TYPE_FLAG_VOLATILE) &&
 220                 !(catch_flags & TYPE_FLAG_VOLATILE)) continue;
 221         return type;  /* it matched */
 222     }
 223     return NULL;
 224 }
 225
 226 static inline void copy_exception(void *object, ULONG64 frame,
 227                                   DISPATCHER_CONTEXT *dispatch,
 228                                   const catchblock_info *catchblock,
 229                                   const cxx_type_info *type, ULONG64 exc_base)
 230 {
 231     const type_info *catch_ti = rva_to_ptr(catchblock->type_info, dispatch->ImageBase);
 232     void **dest = rva_to_ptr(catchblock->offset, frame);
 233
 234     if (!catch_ti || !catch_ti->mangled[0]) return;
 235     if (!catchblock->offset) return;
 236
 237     if (catchblock->flags & TYPE_FLAG_REFERENCE)
 238     {
 239         *dest = get_this_pointer(&type->offsets, object);
 240     }
 241     else if (type->flags & CLASS_IS_SIMPLE_TYPE)
 242     {
 243         memmove(dest, object, type->size);
 244         /* if it is a pointer, adjust it */
 245         if (type->size == sizeof(void*)) *dest = get_this_pointer(&type->offsets, *dest);
 246     }
 247     else  /* copy the object */
 248     {
 249         if (type->copy_ctor)
 250         {
 251             if (type->flags & CLASS_HAS_VIRTUAL_BASE_CLASS)
 252             {
 253                 void (__cdecl *copy_ctor)(void*, void*, int) =
 254                     rva_to_ptr(type->copy_ctor, exc_base);
 255                 copy_ctor(dest, get_this_pointer(&type->offsets, object), 1);
 256             }
 257             else
 258             {
 259                 void (__cdecl *copy_ctor)(void*, void*) =
 260                     rva_to_ptr(type->copy_ctor, exc_base);
 261                 copy_ctor(dest, get_this_pointer(&type->offsets, object));
 262             }
 263         }
 264         else
 265             memmove(dest, get_this_pointer(&type->offsets,object), type->size);
 266     }
 267 }
 268
 269 static void cxx_local_unwind(ULONG64 frame, DISPATCHER_CONTEXT *dispatch,
 270                              const cxx_function_descr *descr, int last_level)
 271 {
 272     const unwind_info *unwind_table = rva_to_ptr(descr->unwind_table, dispatch->ImageBase);
 273     void (__cdecl *handler)(ULONG64 unk, ULONG64 rbp);
 274     int *unwind_help = rva_to_ptr(descr->unwind_help, frame);
 275     int trylevel;
 276
 277     if (unwind_help[0] == -2)
 278     {
 279         trylevel = ip_to_state(rva_to_ptr(descr->ipmap, dispatch->ImageBase),
 280                 descr->ipmap_count, dispatch->ControlPc-dispatch->ImageBase);
 281     }
 282     else
 283     {
 284         trylevel = unwind_help[0];
 285     }
 286
 287     TRACE("current level: %d, last level: %d\n", trylevel, last_level);
 288     while (trylevel > last_level)
 289     {
 290         if (trylevel<0 || trylevel>=descr->unwind_count)
 291         {
 292             ERR("invalid trylevel %d\n", trylevel);
 293             terminate();
 294         }
 295         handler = rva_to_ptr(unwind_table[trylevel].handler, dispatch->ImageBase);
 296         if (handler)
 297         {
 298             TRACE("handler: %p\n", handler);
 299             handler(0, frame);
 300         }
 301         trylevel = unwind_table[trylevel].prev;
 302     }
 303     unwind_help[0] = trylevel;
 304 }
 305
 306 static LONG CALLBACK cxx_rethrow_filter(PEXCEPTION_POINTERS eptrs, void *c)
 307 {
 308     EXCEPTION_RECORD *rec = eptrs->ExceptionRecord;
 309     cxx_catch_ctx *ctx = c;
 310
 311     if (rec->ExceptionCode != CXX_EXCEPTION)
 312         return EXCEPTION_CONTINUE_SEARCH;
 313     if (!rec->ExceptionInformation[1] && !rec->ExceptionInformation[2])
 314         return EXCEPTION_EXECUTE_HANDLER;
 315     if (rec->ExceptionInformation[1] == ctx->prev_rec->ExceptionInformation[1])
 316         ctx->rethrow = TRUE;
 317     return EXCEPTION_CONTINUE_SEARCH;
 318 }
 319
 320 static void CALLBACK cxx_catch_cleanup(BOOL normal, void *c)
 321 {
 322     cxx_catch_ctx *ctx = c;
 323     __CxxUnregisterExceptionObject(&ctx->frame_info, ctx->rethrow);
 324 }
 325
 326 static void* WINAPI call_catch_block(EXCEPTION_RECORD *rec)
 327 {
 328     ULONG64 frame = rec->ExceptionInformation[1];
 329     const cxx_function_descr *descr = (void*)rec->ExceptionInformation[2];
 330     EXCEPTION_RECORD *prev_rec = (void*)rec->ExceptionInformation[4];
 331     EXCEPTION_RECORD *untrans_rec = (void*)rec->ExceptionInformation[6];
 332     CONTEXT *context = (void*)rec->ExceptionInformation[7];
 333     void* (__cdecl *handler)(ULONG64 unk, ULONG64 rbp) = (void*)rec->ExceptionInformation[5];
 334     int *unwind_help = rva_to_ptr(descr->unwind_help, frame);
 335     EXCEPTION_POINTERS ep = { prev_rec, context };
 336     cxx_catch_ctx ctx;
 337     void *ret_addr = NULL;
 338
 339     TRACE("calling handler %p\n", handler);
 340
 341     ctx.rethrow = FALSE;
 342     ctx.prev_rec = prev_rec;
 343     __CxxRegisterExceptionObject(&ep, &ctx.frame_info);
 344     msvcrt_get_thread_data()->processing_throw--;
 345     __TRY
 346     {
 347         __TRY
 348         {
 349             ret_addr = handler(0, frame);
 350         }
 351         __EXCEPT_CTX(cxx_rethrow_filter, &ctx)
 352         {
 353             TRACE("detect rethrow: exception code: %lx\n", prev_rec->ExceptionCode);
 354             ctx.rethrow = TRUE;
 355
 356             if (untrans_rec)
 357             {
 358                 __DestructExceptionObject(prev_rec);
 359                 RaiseException(untrans_rec->ExceptionCode, untrans_rec->ExceptionFlags,
 360                         untrans_rec->NumberParameters, untrans_rec->ExceptionInformation);
 361             }
 362             else
 363             {
 364                 RaiseException(prev_rec->ExceptionCode, prev_rec->ExceptionFlags,
 365                         prev_rec->NumberParameters, prev_rec->ExceptionInformation);
 366             }
 367         }
 368         __ENDTRY
 369     }
 370     __FINALLY_CTX(cxx_catch_cleanup, &ctx)
 371
 372     unwind_help[0] = -2;
 373     unwind_help[1] = -1;
 374     return ret_addr;
 375 }
 376
 377 static inline BOOL cxx_is_consolidate(const EXCEPTION_RECORD *rec)
 378 {
 379     return rec->ExceptionCode==STATUS_UNWIND_CONSOLIDATE && rec->NumberParameters==8 &&
 380            rec->ExceptionInformation[0]==(ULONG_PTR)call_catch_block;
 381 }
 382
 383 static inline void find_catch_block(EXCEPTION_RECORD *rec, CONTEXT *context,
 384                                     EXCEPTION_RECORD *untrans_rec,
 385                                     ULONG64 frame, DISPATCHER_CONTEXT *dispatch,
 386                                     const cxx_function_descr *descr,
 387                                     cxx_exception_type *info, ULONG64 orig_frame)
 388 {
 389     ULONG64 exc_base = (rec->NumberParameters == 4 ? rec->ExceptionInformation[3] : 0);
 390     int trylevel = ip_to_state(rva_to_ptr(descr->ipmap, dispatch->ImageBase),
 391             descr->ipmap_count, dispatch->ControlPc-dispatch->ImageBase);
 392     thread_data_t *data = msvcrt_get_thread_data();
 393     const tryblock_info *in_catch;
 394     EXCEPTION_RECORD catch_record;
 395     CONTEXT ctx;
 396     UINT i, j;
 397     INT *unwind_help;
 398
 399     data->processing_throw++;
 400     for (i=descr->tryblock_count; i>0; i--)
 401     {
 402         in_catch = rva_to_ptr(descr->tryblock, dispatch->ImageBase);
 403         in_catch = &in_catch[i-1];
 404
 405         if (trylevel>in_catch->end_level && trylevel<=in_catch->catch_level)
 406             break;
 407     }
 408     if (!i)
 409         in_catch = NULL;
 410
 411     unwind_help = rva_to_ptr(descr->unwind_help, orig_frame);
 412     if (trylevel > unwind_help[1])
 413         unwind_help[0] = unwind_help[1] = trylevel;
 414     else
 415         trylevel = unwind_help[1];
 416     TRACE("current trylevel: %d\n", trylevel);
 417
 418     for (i=0; i<descr->tryblock_count; i++)
 419     {
 420         const tryblock_info *tryblock = rva_to_ptr(descr->tryblock, dispatch->ImageBase);
 421         tryblock = &tryblock[i];
 422
 423         if (trylevel < tryblock->start_level) continue;
 424         if (trylevel > tryblock->end_level) continue;
 425
 426         if (in_catch)
 427         {
 428             if(tryblock->start_level <= in_catch->end_level) continue;
 429             if(tryblock->end_level > in_catch->catch_level) continue;
 430         }
 431
 432         /* got a try block */
 433         for (j=0; j<tryblock->catchblock_count; j++)
 434         {
 435             const catchblock_info *catchblock = rva_to_ptr(tryblock->catchblock, dispatch->ImageBase);
 436             catchblock = &catchblock[j];
 437
 438             if (info)
 439             {
 440                 const cxx_type_info *type = find_caught_type(info, exc_base,
 441                         rva_to_ptr(catchblock->type_info, dispatch->ImageBase),
 442                         catchblock->flags);
 443                 if (!type) continue;
 444
 445                 TRACE("matched type %p in tryblock %d catchblock %d\n", type, i, j);
 446
 447                 /* copy the exception to its destination on the stack */
 448                 copy_exception((void*)rec->ExceptionInformation[1],
 449                         orig_frame, dispatch, catchblock, type, exc_base);
 450             }
 451             else
 452             {
 453                 /* no CXX_EXCEPTION only proceed with a catch(...) block*/
 454                 if (catchblock->type_info)
 455                     continue;
 456                 TRACE("found catch(...) block\n");
 457             }
 458
 459             /* unwind stack and call catch */
 460             memset(&catch_record, 0, sizeof(catch_record));
 461             catch_record.ExceptionCode = STATUS_UNWIND_CONSOLIDATE;
 462             catch_record.ExceptionFlags = EXCEPTION_NONCONTINUABLE;
 463             catch_record.NumberParameters = 8;
 464             catch_record.ExceptionInformation[0] = (ULONG_PTR)call_catch_block;
 465             catch_record.ExceptionInformation[1] = orig_frame;
 466             catch_record.ExceptionInformation[2] = (ULONG_PTR)descr;
 467             catch_record.ExceptionInformation[3] = tryblock->start_level;
 468             catch_record.ExceptionInformation[4] = (ULONG_PTR)rec;
 469             catch_record.ExceptionInformation[5] =
 470                 (ULONG_PTR)rva_to_ptr(catchblock->handler, dispatch->ImageBase);
 471             catch_record.ExceptionInformation[6] = (ULONG_PTR)untrans_rec;
 472             catch_record.ExceptionInformation[7] = (ULONG_PTR)context;
 473             RtlUnwindEx((void*)frame, (void*)dispatch->ControlPc, &catch_record, NULL, &ctx, NULL);
 474         }
 475     }
 476
 477     TRACE("no matching catch block found\n");
 478     data->processing_throw--;
 479 }
 480
 481 static LONG CALLBACK se_translation_filter(EXCEPTION_POINTERS *ep, void *c)
 482 {
 483     se_translator_ctx *ctx = (se_translator_ctx *)c;
 484     EXCEPTION_RECORD *rec = ep->ExceptionRecord;
 485     cxx_exception_type *exc_type;
 486
 487     if (rec->ExceptionCode != CXX_EXCEPTION)
 488     {
 489         TRACE("non-c++ exception thrown in SEH handler: %lx\n", rec->ExceptionCode);
 490         terminate();
 491     }
 492
 493     exc_type = (cxx_exception_type *)rec->ExceptionInformation[2];
 494     find_catch_block(rec, ep->ContextRecord, ctx->seh_rec, ctx->dest_frame, ctx->dispatch,
 495                      ctx->descr, exc_type, ctx->orig_frame);
 496
 497     __DestructExceptionObject(rec);
 498     return ExceptionContinueSearch;
 499 }
 500
 501 static void check_noexcept( PEXCEPTION_RECORD rec,
 502         const cxx_function_descr *descr, BOOL nested )
 503 {
 504     if (!nested && rec->ExceptionCode == CXX_EXCEPTION &&
 505             descr->magic >= CXX_FRAME_MAGIC_VC8 &&
 506             (descr->flags & FUNC_DESCR_NOEXCEPT))
 507     {
 508         ERR("noexcept function propagating exception\n");
 509         terminate();
 510     }
 511 }
 512
 513 static DWORD cxx_frame_handler(EXCEPTION_RECORD *rec, ULONG64 frame,
 514                                CONTEXT *context, DISPATCHER_CONTEXT *dispatch,
 515                                const cxx_function_descr *descr)
 516 {
 517     int trylevel = ip_to_state(rva_to_ptr(descr->ipmap, dispatch->ImageBase),
 518             descr->ipmap_count, dispatch->ControlPc-dispatch->ImageBase);
 519     cxx_exception_type *exc_type;
 520     ULONG64 orig_frame = frame;
 521     ULONG64 throw_base;
 522     DWORD throw_func_off;
 523     void *throw_func;
 524     UINT i, j;
 525     int unwindlevel = -1;
 526
 527     if (descr->magic<CXX_FRAME_MAGIC_VC6 || descr->magic>CXX_FRAME_MAGIC_VC8)
 528     {
 529         FIXME("unhandled frame magic %x\n", descr->magic);
 530         return ExceptionContinueSearch;
 531     }
 532
 533     if (descr->magic >= CXX_FRAME_MAGIC_VC8 &&
 534         (descr->flags & FUNC_DESCR_SYNCHRONOUS) &&
 535         (rec->ExceptionCode != CXX_EXCEPTION &&
 536         !cxx_is_consolidate(rec) &&
 537         rec->ExceptionCode != STATUS_LONGJUMP))
 538         return ExceptionContinueSearch;  /* handle only c++ exceptions */
 539
 540     /* update orig_frame if it's a nested exception */
 541     throw_func_off = RtlLookupFunctionEntry(dispatch->ControlPc, &throw_base, NULL)->BeginAddress;
 542     throw_func = rva_to_ptr(throw_func_off, throw_base);
 543     TRACE("reconstructed handler pointer: %p\n", throw_func);
 544     for (i=descr->tryblock_count; i>0; i--)
 545     {
 546         const tryblock_info *tryblock = rva_to_ptr(descr->tryblock, dispatch->ImageBase);
 547         tryblock = &tryblock[i-1];
 548
 549         if (trylevel>tryblock->end_level && trylevel<=tryblock->catch_level)
 550         {
 551             for (j=0; j<tryblock->catchblock_count; j++)
 552             {
 553                 const catchblock_info *catchblock = rva_to_ptr(tryblock->catchblock, dispatch->ImageBase);
 554                 catchblock = &catchblock[j];
 555
 556                 if (rva_to_ptr(catchblock->handler, dispatch->ImageBase) == throw_func)
 557                 {
 558                     TRACE("nested exception detected\n");
 559                     unwindlevel = tryblock->end_level;
 560                     orig_frame = *(ULONG64*)rva_to_ptr(catchblock->frame, frame);
 561                     TRACE("setting orig_frame to %I64x\n", orig_frame);
 562                 }
 563             }
 564         }
 565     }
 566
 567     if (rec->ExceptionFlags & (EH_UNWINDING|EH_EXIT_UNWIND))
 568     {
 569         if (rec->ExceptionFlags & EH_TARGET_UNWIND)
 570             cxx_local_unwind(orig_frame, dispatch, descr,
 571                 cxx_is_consolidate(rec) ? rec->ExceptionInformation[3] : trylevel);
 572         else
 573             cxx_local_unwind(orig_frame, dispatch, descr, unwindlevel);
 574         return ExceptionContinueSearch;
 575     }
 576     if (!descr->tryblock_count)
 577     {
 578         check_noexcept(rec, descr, orig_frame != frame);
 579         return ExceptionContinueSearch;
 580     }
 581
 582     if (rec->ExceptionCode == CXX_EXCEPTION &&
 583         (!rec->ExceptionInformation[1] && !rec->ExceptionInformation[2]))
 584     {
 585         TRACE("rethrow detected.\n");
 586         *rec = *msvcrt_get_thread_data()->exc_record;
 587     }
 588     if (rec->ExceptionCode == CXX_EXCEPTION)
 589     {
 590         exc_type = (cxx_exception_type *)rec->ExceptionInformation[2];
 591
 592         if (TRACE_ON(seh))
 593         {
 594             TRACE("handling C++ exception rec %p frame %I64x descr %p\n", rec, frame,  descr);
 595             dump_exception_type(exc_type, rec->ExceptionInformation[3]);
 596             dump_function_descr(descr, dispatch->ImageBase);
 597         }
 598     }
 599     else
 600     {
 601         thread_data_t *data = msvcrt_get_thread_data();
 602
 603         exc_type = NULL;
 604         TRACE("handling C exception code %lx rec %p frame %I64x descr %p\n",
 605                 rec->ExceptionCode, rec, frame, descr);
 606
 607         if (data->se_translator) {
 608             EXCEPTION_POINTERS except_ptrs;
 609             se_translator_ctx ctx;
 610
 611             ctx.dest_frame = frame;
 612             ctx.orig_frame = orig_frame;
 613             ctx.seh_rec    = rec;
 614             ctx.dispatch   = dispatch;
 615             ctx.descr      = descr;
 616             __TRY
 617             {
 618                 except_ptrs.ExceptionRecord = rec;
 619                 except_ptrs.ContextRecord = context;
 620                 data->se_translator(rec->ExceptionCode, &except_ptrs);
 621             }
 622             __EXCEPT_CTX(se_translation_filter, &ctx)
 623             {
 624             }
 625             __ENDTRY
 626         }
 627     }
 628
 629     find_catch_block(rec, context, NULL, frame, dispatch, descr, exc_type, orig_frame);
 630     check_noexcept(rec, descr, orig_frame != frame);
 631     return ExceptionContinueSearch;
 632 }
 633
 634 /*********************************************************************
 635  *              __CxxExceptionFilter (MSVCRT.@)
 636  */
 637 int CDECL __CxxExceptionFilter( PEXCEPTION_POINTERS ptrs,
 638                                 const type_info *ti, int flags, void **copy )
 639 {
 640     FIXME( "%p %p %x %p: not implemented\n", ptrs, ti, flags, copy );
 641     return EXCEPTION_CONTINUE_SEARCH;
 642 }
 643
 644 /*********************************************************************
 645  *              __CxxFrameHandler (MSVCRT.@)
 646  */
 647 EXCEPTION_DISPOSITION CDECL __CxxFrameHandler( EXCEPTION_RECORD *rec, ULONG64 frame,
 648                                                CONTEXT *context, DISPATCHER_CONTEXT *dispatch )
 649 {
 650     TRACE( "%p %I64x %p %p\n", rec, frame, context, dispatch );
 651     return cxx_frame_handler( rec, frame, context, dispatch,
 652             rva_to_ptr(*(UINT*)dispatch->HandlerData, dispatch->ImageBase) );
 653 }
 654
 655
 656 /*********************************************************************
 657  *              __CppXcptFilter (MSVCRT.@)
 658  */
 659 int CDECL __CppXcptFilter(NTSTATUS ex, PEXCEPTION_POINTERS ptr)
 660 {
 661     /* only filter c++ exceptions */
 662     if (ex != CXX_EXCEPTION) return EXCEPTION_CONTINUE_SEARCH;
 663     return _XcptFilter( ex, ptr );
 664 }
 665
 666
 667 /*********************************************************************
 668  *              __CxxDetectRethrow (MSVCRT.@)
 669  */
 670 BOOL CDECL __CxxDetectRethrow(PEXCEPTION_POINTERS ptrs)
 671 {
 672     PEXCEPTION_RECORD rec;
 673
 674     if (!ptrs)
 675         return FALSE;
 676
 677     rec = ptrs->ExceptionRecord;
 678
 679     if (rec->ExceptionCode == CXX_EXCEPTION &&
 680         rec->NumberParameters == 4 &&
 681         rec->ExceptionInformation[0] == CXX_FRAME_MAGIC_VC6 &&
 682         rec->ExceptionInformation[2])
 683     {
 684         ptrs->ExceptionRecord = msvcrt_get_thread_data()->exc_record;
 685         return TRUE;
 686     }
 687     return (msvcrt_get_thread_data()->exc_record == rec);
 688 }
 689
 690
 691 /*********************************************************************
 692  *              __CxxQueryExceptionSize (MSVCRT.@)
 693  */
 694 unsigned int CDECL __CxxQueryExceptionSize(void)
 695 {
 696     return sizeof(cxx_exception_type);
 697 }
 698
 699
 700 /*******************************************************************
 701  *              _setjmp (MSVCRT.@)
 702  */
 703 __ASM_GLOBAL_FUNC( MSVCRT__setjmp,
 704                    "jmp " __ASM_NAME("__wine_setjmpex") );
 705
 706 /*******************************************************************
 707  *              longjmp (MSVCRT.@)
 708  */
 709 void __cdecl MSVCRT_longjmp( _JUMP_BUFFER *jmp, int retval )
 710 {
 711     EXCEPTION_RECORD rec;
 712
 713     if (!retval) retval = 1;
 714     if (jmp->Frame)
 715     {
 716         rec.ExceptionCode = STATUS_LONGJUMP;
 717         rec.ExceptionFlags = 0;
 718         rec.ExceptionRecord = NULL;
 719         rec.ExceptionAddress = NULL;
 720         rec.NumberParameters = 1;
 721         rec.ExceptionInformation[0] = (DWORD_PTR)jmp;
 722         RtlUnwind( (void *)jmp->Frame, (void *)jmp->Rip, &rec, IntToPtr(retval) );
 723     }
 724     __wine_longjmp( (__wine_jmp_buf *)jmp, retval );
 725 }
 726
 727 /*******************************************************************
 728  *              _local_unwind (MSVCRT.@)
 729  */
 730 void __cdecl _local_unwind( void *frame, void *target )
 731 {
 732     RtlUnwind( frame, target, NULL, 0 );
 733 }
 734
 735 /*********************************************************************
 736  *              _fpieee_flt (MSVCRT.@)
 737  */
 738 int __cdecl _fpieee_flt(__msvcrt_ulong exception_code, EXCEPTION_POINTERS *ep,
 739         int (__cdecl *handler)(_FPIEEE_RECORD*))
 740 {
 741     FIXME("(%lx %p %p) opcode: %#I64x\n", exception_code, ep, handler,
 742             *(ULONG64*)ep->ContextRecord->Rip);
 743     return EXCEPTION_CONTINUE_SEARCH;
 744 }
 745
 746 #if _MSVCR_VER>=110 && _MSVCR_VER<=120
 747 /*********************************************************************
 748  *  __crtCapturePreviousContext (MSVCR110.@)
 749  */
 750 void __cdecl get_prev_context(CONTEXT *ctx, DWORD64 rip)
 751 {
 752     ULONG64 frame, image_base;
 753     RUNTIME_FUNCTION *rf;
 754     void *data;
 755
 756     TRACE("(%p)\n", ctx);
 757
 758     rf = RtlLookupFunctionEntry(ctx->Rip, &image_base, NULL);
 759     if(!rf) {
 760         FIXME("RtlLookupFunctionEntry failed\n");
 761         return;
 762     }
 763
 764     RtlVirtualUnwind(UNW_FLAG_NHANDLER, image_base, ctx->Rip,
 765             rf, ctx, &data, &frame, NULL);
 766 }
 767
 768 __ASM_GLOBAL_FUNC( __crtCapturePreviousContext,
 769                    "movq %rcx,8(%rsp)\n\t"
 770                    "call " __ASM_NAME("RtlCaptureContext") "\n\t"
 771                    "movq 8(%rsp),%rcx\n\t"     /* context */
 772                    "leaq 8(%rsp),%rax\n\t"
 773                    "movq %rax,0x98(%rcx)\n\t"  /* context->Rsp */
 774                    "movq (%rsp),%rax\n\t"
 775                    "movq %rax,0xf8(%rcx)\n\t"  /* context->Rip */
 776                    "jmp " __ASM_NAME("get_prev_context") )
 777 #endif
 778
 779 #endif  /* __x86_64__ */