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