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 #include "config.h"
  22 #include "wine/port.h"
  23
  24 #ifdef __x86_64__
  25
  26 #include <stdarg.h>
  27
  28 #include "ntstatus.h"
  29 #define WIN32_NO_STATUS
  30 #include "windef.h"
  31 #include "winbase.h"
  32 #include "winternl.h"
  33 #include "msvcrt.h"
  34 #include "wine/exception.h"
  35 #include "excpt.h"
  36 #include "wine/debug.h"
  37
  38 #include "cppexcept.h"
  39
  40 WINE_DEFAULT_DEBUG_CHANNEL(seh);
  41
  42 struct _DISPATCHER_CONTEXT;
  43
  44 typedef LONG (WINAPI *PC_LANGUAGE_EXCEPTION_HANDLER)( EXCEPTION_POINTERS *ptrs, ULONG64 frame );
  45 typedef EXCEPTION_DISPOSITION (WINAPI *PEXCEPTION_ROUTINE)( EXCEPTION_RECORD *rec,
  46                                                             ULONG64 frame,
  47                                                             CONTEXT *context,
  48                                                             struct _DISPATCHER_CONTEXT *dispatch );
  49
  50 typedef struct _DISPATCHER_CONTEXT
  51 {
  52     ULONG64               ControlPc;
  53     ULONG64               ImageBase;
  54     PRUNTIME_FUNCTION     FunctionEntry;
  55     ULONG64               EstablisherFrame;
  56     ULONG64               TargetIp;
  57     PCONTEXT              ContextRecord;
  58     PEXCEPTION_ROUTINE    LanguageHandler;
  59     PVOID                 HandlerData;
  60     PUNWIND_HISTORY_TABLE HistoryTable;
  61     ULONG                 ScopeIndex;
  62 } DISPATCHER_CONTEXT;
  63
  64 typedef struct
  65 {
  66     int  prev;
  67     UINT handler;
  68 } unwind_info;
  69
  70 typedef struct
  71 {
  72     UINT flags;
  73     UINT type_info;
  74     int  offset;
  75     UINT handler;
  76     UINT frame;
  77 } catchblock_info;
  78 #define TYPE_FLAG_CONST      1
  79 #define TYPE_FLAG_VOLATILE   2
  80 #define TYPE_FLAG_REFERENCE  8
  81
  82 typedef struct
  83 {
  84     int  start_level;
  85     int  end_level;
  86     int  catch_level;
  87     int  catchblock_count;
  88     UINT catchblock;
  89 } tryblock_info;
  90
  91 typedef struct
  92 {
  93     int ip;
  94     int state;
  95 } ipmap_info;
  96
  97 typedef struct __cxx_function_descr
  98 {
  99     UINT magic;
 100     UINT unwind_count;
 101     UINT unwind_table;
 102     UINT tryblock_count;
 103     UINT tryblock;
 104     UINT ipmap_count;
 105     UINT ipmap;
 106     UINT unwind_help;
 107     UINT expect_list;
 108     UINT flags;
 109 } cxx_function_descr;
 110
 111 typedef struct
 112 {
 113     cxx_frame_info frame_info;
 114     BOOL rethrow;
 115 } cxx_catch_ctx;
 116
 117 typedef struct
 118 {
 119     ULONG64 dest_frame;
 120     ULONG64 orig_frame;
 121     EXCEPTION_RECORD *seh_rec;
 122     DISPATCHER_CONTEXT *dispatch;
 123     const cxx_function_descr *descr;
 124 } se_translator_ctx;
 125
 126 static inline void* rva_to_ptr(UINT rva, ULONG64 base)
 127 {
 128     return rva ? (void*)(base+rva) : NULL;
 129 }
 130
 131 static inline void dump_type(UINT type_rva, ULONG64 base)
 132 {
 133     const cxx_type_info *type = rva_to_ptr(type_rva, base);
 134
 135     TRACE("flags %x type %x %s offsets %d,%d,%d size %d copy ctor %x(%p)\n",
 136             type->flags, type->type_info, dbgstr_type_info(rva_to_ptr(type->type_info, base)),
 137             type->offsets.this_offset, type->offsets.vbase_descr, type->offsets.vbase_offset,
 138             type->size, type->copy_ctor, rva_to_ptr(type->copy_ctor, base));
 139 }
 140
 141 static void dump_exception_type(const cxx_exception_type *type, ULONG64 base)
 142 {
 143     const cxx_type_info_table *type_info_table = rva_to_ptr(type->type_info_table, base);
 144     UINT i;
 145
 146     TRACE("flags %x destr %x(%p) handler %x(%p) type info %x(%p)\n",
 147             type->flags, type->destructor, rva_to_ptr(type->destructor, base),
 148             type->custom_handler, rva_to_ptr(type->custom_handler, base),
 149             type->type_info_table, type_info_table);
 150     for (i = 0; i < type_info_table->count; i++)
 151     {
 152         TRACE("    %d: ", i);
 153         dump_type(type_info_table->info[i], base);
 154     }
 155 }
 156
 157 static void dump_function_descr(const cxx_function_descr *descr, ULONG64 image_base)
 158 {
 159     unwind_info *unwind_table = rva_to_ptr(descr->unwind_table, image_base);
 160     tryblock_info *tryblock = rva_to_ptr(descr->tryblock, image_base);
 161     ipmap_info *ipmap = rva_to_ptr(descr->ipmap, image_base);
 162     UINT i, j;
 163
 164     TRACE("magic %x\n", descr->magic);
 165     TRACE("unwind table: %x(%p) %d\n", descr->unwind_table, unwind_table, descr->unwind_count);
 166     for (i=0; i<descr->unwind_count; i++)
 167     {
 168         TRACE("    %d: prev %d func %x(%p)\n", i, unwind_table[i].prev,
 169                 unwind_table[i].handler, rva_to_ptr(unwind_table[i].handler, image_base));
 170     }
 171     TRACE("try table: %x(%p) %d\n", descr->tryblock, tryblock, descr->tryblock_count);
 172     for (i=0; i<descr->tryblock_count; i++)
 173     {
 174         catchblock_info *catchblock = rva_to_ptr(tryblock[i].catchblock, image_base);
 175
 176         TRACE("    %d: start %d end %d catchlevel %d catch %x(%p) %d\n", i,
 177                 tryblock[i].start_level, tryblock[i].end_level,
 178                 tryblock[i].catch_level, tryblock[i].catchblock,
 179                 catchblock, tryblock[i].catchblock_count);
 180         for (j=0; j<tryblock[i].catchblock_count; j++)
 181         {
 182             TRACE("        %d: flags %x offset %d handler %x(%p) frame %x type %x %s\n",
 183                     j, catchblock[j].flags, catchblock[j].offset, catchblock[j].handler,
 184                     rva_to_ptr(catchblock[j].handler, image_base), catchblock[j].frame,
 185                     catchblock[j].type_info,
 186                     dbgstr_type_info(rva_to_ptr(catchblock[j].type_info, image_base)));
 187         }
 188     }
 189     TRACE("ipmap: %x(%p) %d\n", descr->ipmap, ipmap, descr->ipmap_count);
 190     for (i=0; i<descr->ipmap_count; i++)
 191     {
 192         TRACE("    %d: ip %x state %d\n", i, ipmap[i].ip, ipmap[i].state);
 193     }
 194     TRACE("unwind_help %d\n", descr->unwind_help);
 195     if (descr->magic <= CXX_FRAME_MAGIC_VC6) return;
 196     TRACE("expect list: %x\n", descr->expect_list);
 197     if (descr->magic <= CXX_FRAME_MAGIC_VC7) return;
 198     TRACE("flags: %08x\n", descr->flags);
 199 }
 200
 201 static inline int ip_to_state(ipmap_info *ipmap, UINT count, int ip)
 202 {
 203     UINT low = 0, high = count-1, med;
 204
 205     while (low < high) {
 206         med = low + (high-low)/2;
 207
 208         if (ipmap[med].ip <= ip && ipmap[med+1].ip > ip)
 209         {
 210             low = med;
 211             break;
 212         }
 213         if (ipmap[med].ip < ip) low = med+1;
 214         else high = med-1;
 215     }
 216
 217     TRACE("%x -> %d\n", ip, ipmap[low].state);
 218     return ipmap[low].state;
 219 }
 220
 221 /* check if the exception type is caught by a given catch block, and return the type that matched */
 222 static const cxx_type_info *find_caught_type(cxx_exception_type *exc_type, ULONG64 exc_base,
 223                                              const type_info *catch_ti, UINT catch_flags)
 224 {
 225     const cxx_type_info_table *type_info_table = rva_to_ptr(exc_type->type_info_table, exc_base);
 226     UINT i;
 227
 228     for (i = 0; i < type_info_table->count; i++)
 229     {
 230         const cxx_type_info *type = rva_to_ptr(type_info_table->info[i], exc_base);
 231         const type_info *ti = rva_to_ptr(type->type_info, exc_base);
 232
 233         if (!catch_ti) return type;   /* catch(...) matches any type */
 234         if (catch_ti != ti)
 235         {
 236             if (strcmp( catch_ti->mangled, ti->mangled )) continue;
 237         }
 238         /* type is the same, now check the flags */
 239         if ((exc_type->flags & TYPE_FLAG_CONST) &&
 240                 !(catch_flags & TYPE_FLAG_CONST)) continue;
 241         if ((exc_type->flags & TYPE_FLAG_VOLATILE) &&
 242                 !(catch_flags & TYPE_FLAG_VOLATILE)) continue;
 243         return type;  /* it matched */
 244     }
 245     return NULL;
 246 }
 247
 248 static inline void copy_exception(void *object, ULONG64 frame,
 249                                   DISPATCHER_CONTEXT *dispatch,
 250                                   const catchblock_info *catchblock,
 251                                   const cxx_type_info *type)
 252 {
 253     const type_info *catch_ti = rva_to_ptr(catchblock->type_info, dispatch->ImageBase);
 254     void **dest = rva_to_ptr(catchblock->offset, frame);
 255
 256     if (!catch_ti || !catch_ti->mangled[0]) return;
 257     if (!catchblock->offset) return;
 258
 259     if (catchblock->flags & TYPE_FLAG_REFERENCE)
 260     {
 261         *dest = get_this_pointer(&type->offsets, object);
 262     }
 263     else if (type->flags & CLASS_IS_SIMPLE_TYPE)
 264     {
 265         memmove(dest, object, type->size);
 266         /* if it is a pointer, adjust it */
 267         if (type->size == sizeof(void*)) *dest = get_this_pointer(&type->offsets, *dest);
 268     }
 269     else  /* copy the object */
 270     {
 271         if (type->copy_ctor)
 272         {
 273             if (type->flags & CLASS_HAS_VIRTUAL_BASE_CLASS)
 274             {
 275                 void (__cdecl *copy_ctor)(void*, void*, int) =
 276                     rva_to_ptr(type->copy_ctor, dispatch->ImageBase);
 277                 copy_ctor(dest, get_this_pointer(&type->offsets, object), 1);
 278             }
 279             else
 280             {
 281                 void (__cdecl *copy_ctor)(void*, void*) =
 282                     rva_to_ptr(type->copy_ctor, dispatch->ImageBase);
 283                 copy_ctor(dest, get_this_pointer(&type->offsets, object));
 284             }
 285         }
 286         else
 287             memmove(dest, get_this_pointer(&type->offsets,object), type->size);
 288     }
 289 }
 290
 291 static void cxx_local_unwind(ULONG64 frame, DISPATCHER_CONTEXT *dispatch,
 292                              const cxx_function_descr *descr, int last_level)
 293 {
 294     const unwind_info *unwind_table = rva_to_ptr(descr->unwind_table, dispatch->ImageBase);
 295     void (__cdecl *handler)(ULONG64 unk, ULONG64 rbp);
 296     int *unwind_help = rva_to_ptr(descr->unwind_help, frame);
 297     int trylevel;
 298
 299     if (unwind_help[0] == -2)
 300     {
 301         trylevel = ip_to_state(rva_to_ptr(descr->ipmap, dispatch->ImageBase),
 302                 descr->ipmap_count, dispatch->ControlPc-dispatch->ImageBase);
 303     }
 304     else
 305     {
 306         trylevel = unwind_help[0];
 307     }
 308
 309     TRACE("current level: %d, last level: %d\n", trylevel, last_level);
 310     while (trylevel > last_level)
 311     {
 312         if (trylevel<0 || trylevel>=descr->unwind_count)
 313         {
 314             ERR("invalid trylevel %d\n", trylevel);
 315             MSVCRT_terminate();
 316         }
 317         handler = rva_to_ptr(unwind_table[trylevel].handler, dispatch->ImageBase);
 318         if (handler)
 319         {
 320             TRACE("handler: %p\n", handler);
 321             handler(0, frame);
 322         }
 323         trylevel = unwind_table[trylevel].prev;
 324     }
 325     unwind_help[0] = trylevel;
 326 }
 327
 328 static LONG CALLBACK cxx_rethrow_filter(PEXCEPTION_POINTERS eptrs, void *c)
 329 {
 330     EXCEPTION_RECORD *rec = eptrs->ExceptionRecord;
 331     thread_data_t *data = msvcrt_get_thread_data();
 332     cxx_catch_ctx *ctx = c;
 333
 334     if (rec->ExceptionCode != CXX_EXCEPTION)
 335         return EXCEPTION_CONTINUE_SEARCH;
 336     if (!rec->ExceptionInformation[1] && !rec->ExceptionInformation[2])
 337         return EXCEPTION_EXECUTE_HANDLER;
 338     if (rec->ExceptionInformation[1] == data->exc_record->ExceptionInformation[1])
 339         ctx->rethrow = TRUE;
 340     return EXCEPTION_CONTINUE_SEARCH;
 341 }
 342
 343 static void CALLBACK cxx_catch_cleanup(BOOL normal, void *c)
 344 {
 345     cxx_catch_ctx *ctx = c;
 346     __CxxUnregisterExceptionObject(&ctx->frame_info, ctx->rethrow);
 347 }
 348
 349 static void* WINAPI call_catch_block(EXCEPTION_RECORD *rec)
 350 {
 351     ULONG64 frame = rec->ExceptionInformation[1];
 352     const cxx_function_descr *descr = (void*)rec->ExceptionInformation[2];
 353     EXCEPTION_RECORD *prev_rec = (void*)rec->ExceptionInformation[4];
 354     EXCEPTION_RECORD *untrans_rec = (void*)rec->ExceptionInformation[6];
 355     void* (__cdecl *handler)(ULONG64 unk, ULONG64 rbp) = (void*)rec->ExceptionInformation[5];
 356     int *unwind_help = rva_to_ptr(descr->unwind_help, frame);
 357     cxx_catch_ctx ctx;
 358     void *ret_addr = NULL;
 359
 360     TRACE("calling handler %p\n", handler);
 361
 362     ctx.rethrow = FALSE;
 363     __CxxRegisterExceptionObject(&prev_rec, &ctx.frame_info);
 364     __TRY
 365     {
 366         __TRY
 367         {
 368             ret_addr = handler(0, frame);
 369         }
 370         __EXCEPT_CTX(cxx_rethrow_filter, &ctx)
 371         {
 372             TRACE("detect rethrow: exception code: %x\n", prev_rec->ExceptionCode);
 373             ctx.rethrow = TRUE;
 374
 375             if (untrans_rec)
 376             {
 377                 __DestructExceptionObject(prev_rec);
 378                 RaiseException(untrans_rec->ExceptionCode, untrans_rec->ExceptionFlags,
 379                         untrans_rec->NumberParameters, untrans_rec->ExceptionInformation);
 380             }
 381             else
 382             {
 383                 RaiseException(prev_rec->ExceptionCode, prev_rec->ExceptionFlags,
 384                         prev_rec->NumberParameters, prev_rec->ExceptionInformation);
 385             }
 386         }
 387         __ENDTRY
 388     }
 389     __FINALLY_CTX(cxx_catch_cleanup, &ctx)
 390
 391     unwind_help[0] = -2;
 392     unwind_help[1] = -1;
 393     return ret_addr;
 394 }
 395
 396 static inline BOOL cxx_is_consolidate(const EXCEPTION_RECORD *rec)
 397 {
 398     return rec->ExceptionCode==STATUS_UNWIND_CONSOLIDATE && rec->NumberParameters==7 &&
 399            rec->ExceptionInformation[0]==(ULONG_PTR)call_catch_block;
 400 }
 401
 402 static inline void find_catch_block(EXCEPTION_RECORD *rec, EXCEPTION_RECORD *untrans_rec,
 403                                     ULONG64 frame, DISPATCHER_CONTEXT *dispatch,
 404                                     const cxx_function_descr *descr,
 405                                     cxx_exception_type *info, ULONG64 orig_frame)
 406 {
 407     ULONG64 exc_base = (rec->NumberParameters == 4 ? rec->ExceptionInformation[3] : 0);
 408     int trylevel = ip_to_state(rva_to_ptr(descr->ipmap, dispatch->ImageBase),
 409             descr->ipmap_count, dispatch->ControlPc-dispatch->ImageBase);
 410     const tryblock_info *in_catch;
 411     EXCEPTION_RECORD catch_record;
 412     CONTEXT context;
 413     UINT i, j;
 414     INT *unwind_help;
 415
 416     for (i=descr->tryblock_count; i>0; i--)
 417     {
 418         in_catch = rva_to_ptr(descr->tryblock, dispatch->ImageBase);
 419         in_catch = &in_catch[i-1];
 420
 421         if (trylevel>in_catch->end_level && trylevel<=in_catch->catch_level)
 422             break;
 423     }
 424     if (!i)
 425         in_catch = NULL;
 426
 427     unwind_help = rva_to_ptr(descr->unwind_help, orig_frame);
 428     if (trylevel > unwind_help[1])
 429         unwind_help[0] = unwind_help[1] = trylevel;
 430     else
 431         trylevel = unwind_help[1];
 432     TRACE("current trylevel: %d\n", trylevel);
 433
 434     for (i=0; i<descr->tryblock_count; i++)
 435     {
 436         const tryblock_info *tryblock = rva_to_ptr(descr->tryblock, dispatch->ImageBase);
 437         tryblock = &tryblock[i];
 438
 439         if (trylevel < tryblock->start_level) continue;
 440         if (trylevel > tryblock->end_level) continue;
 441
 442         if (in_catch)
 443         {
 444             if(tryblock->start_level <= in_catch->end_level) continue;
 445             if(tryblock->end_level > in_catch->catch_level) continue;
 446         }
 447
 448         /* got a try block */
 449         for (j=0; j<tryblock->catchblock_count; j++)
 450         {
 451             const catchblock_info *catchblock = rva_to_ptr(tryblock->catchblock, dispatch->ImageBase);
 452             catchblock = &catchblock[j];
 453
 454             if (info)
 455             {
 456                 const cxx_type_info *type = find_caught_type(info, exc_base,
 457                         rva_to_ptr(catchblock->type_info, dispatch->ImageBase),
 458                         catchblock->flags);
 459                 if (!type) continue;
 460
 461                 TRACE("matched type %p in tryblock %d catchblock %d\n", type, i, j);
 462
 463                 /* copy the exception to its destination on the stack */
 464                 copy_exception((void*)rec->ExceptionInformation[1],
 465                         orig_frame, dispatch, catchblock, type);
 466             }
 467             else
 468             {
 469                 /* no CXX_EXCEPTION only proceed with a catch(...) block*/
 470                 if (catchblock->type_info)
 471                     continue;
 472                 TRACE("found catch(...) block\n");
 473             }
 474
 475             /* unwind stack and call catch */
 476             memset(&catch_record, 0, sizeof(catch_record));
 477             catch_record.ExceptionCode = STATUS_UNWIND_CONSOLIDATE;
 478             catch_record.ExceptionFlags = EXCEPTION_NONCONTINUABLE;
 479             catch_record.NumberParameters = 7;
 480             catch_record.ExceptionInformation[0] = (ULONG_PTR)call_catch_block;
 481             catch_record.ExceptionInformation[1] = orig_frame;
 482             catch_record.ExceptionInformation[2] = (ULONG_PTR)descr;
 483             catch_record.ExceptionInformation[3] = tryblock->start_level;
 484             catch_record.ExceptionInformation[4] = (ULONG_PTR)rec;
 485             catch_record.ExceptionInformation[5] =
 486                 (ULONG_PTR)rva_to_ptr(catchblock->handler, dispatch->ImageBase);
 487             catch_record.ExceptionInformation[6] = (ULONG_PTR)untrans_rec;
 488             RtlUnwindEx((void*)frame, (void*)dispatch->ControlPc, &catch_record, NULL, &context, NULL);
 489         }
 490     }
 491
 492     TRACE("no matching catch block found\n");
 493 }
 494
 495 static LONG CALLBACK se_translation_filter(EXCEPTION_POINTERS *ep, void *c)
 496 {
 497     se_translator_ctx *ctx = (se_translator_ctx *)c;
 498     EXCEPTION_RECORD *rec = ep->ExceptionRecord;
 499     cxx_exception_type *exc_type;
 500
 501     if (rec->ExceptionCode != CXX_EXCEPTION)
 502     {
 503         TRACE("non-c++ exception thrown in SEH handler: %x\n", rec->ExceptionCode);
 504         MSVCRT_terminate();
 505     }
 506
 507     exc_type = (cxx_exception_type *)rec->ExceptionInformation[2];
 508     find_catch_block(rec, ctx->seh_rec, ctx->dest_frame, ctx->dispatch,
 509                      ctx->descr, exc_type, ctx->orig_frame);
 510
 511     __DestructExceptionObject(rec);
 512     return ExceptionContinueSearch;
 513 }
 514
 515 static DWORD cxx_frame_handler(EXCEPTION_RECORD *rec, ULONG64 frame,
 516                                CONTEXT *context, DISPATCHER_CONTEXT *dispatch,
 517                                const cxx_function_descr *descr)
 518 {
 519     int trylevel = ip_to_state(rva_to_ptr(descr->ipmap, dispatch->ImageBase),
 520             descr->ipmap_count, dispatch->ControlPc-dispatch->ImageBase);
 521     cxx_exception_type *exc_type;
 522     ULONG64 orig_frame = frame;
 523     ULONG64 throw_base;
 524     DWORD throw_func_off;
 525     void *throw_func;
 526     UINT i, j;
 527     int unwindlevel = -1;
 528
 529     if (descr->magic<CXX_FRAME_MAGIC_VC6 || descr->magic>CXX_FRAME_MAGIC_VC8)
 530     {
 531         FIXME("unhandled frame magic %x\n", descr->magic);
 532         return ExceptionContinueSearch;
 533     }
 534
 535     if (descr->magic >= CXX_FRAME_MAGIC_VC8 &&
 536         (descr->flags & FUNC_DESCR_SYNCHRONOUS) &&
 537         (rec->ExceptionCode != CXX_EXCEPTION &&
 538         !cxx_is_consolidate(rec) &&
 539         rec->ExceptionCode != STATUS_LONGJUMP))
 540         return ExceptionContinueSearch;  /* handle only c++ exceptions */
 541
 542     /* update orig_frame if it's a nested exception */
 543     throw_func_off = RtlLookupFunctionEntry(dispatch->ControlPc, &throw_base, NULL)->BeginAddress;
 544     throw_func = rva_to_ptr(throw_func_off, throw_base);
 545     TRACE("reconstructed handler pointer: %p\n", throw_func);
 546     for (i=descr->tryblock_count; i>0; i--)
 547     {
 548         const tryblock_info *tryblock = rva_to_ptr(descr->tryblock, dispatch->ImageBase);
 549         tryblock = &tryblock[i-1];
 550
 551         if (trylevel>tryblock->end_level && trylevel<=tryblock->catch_level)
 552         {
 553             for (j=0; j<tryblock->catchblock_count; j++)
 554             {
 555                 const catchblock_info *catchblock = rva_to_ptr(tryblock->catchblock, dispatch->ImageBase);
 556                 catchblock = &catchblock[j];
 557
 558                 if (rva_to_ptr(catchblock->handler, dispatch->ImageBase) == throw_func)
 559                 {
 560                     TRACE("nested exception detected\n");
 561                     unwindlevel = tryblock->end_level;
 562                     orig_frame = *(ULONG64*)rva_to_ptr(catchblock->frame, frame);
 563                     TRACE("setting orig_frame to %lx\n", orig_frame);
 564                 }
 565             }
 566         }
 567     }
 568
 569     if (rec->ExceptionFlags & (EH_UNWINDING|EH_EXIT_UNWIND))
 570     {
 571         if (rec->ExceptionFlags & EH_TARGET_UNWIND)
 572             cxx_local_unwind(orig_frame, dispatch, descr,
 573                 cxx_is_consolidate(rec) ? rec->ExceptionInformation[3] : trylevel);
 574         else
 575             cxx_local_unwind(orig_frame, dispatch, descr, unwindlevel);
 576         return ExceptionContinueSearch;
 577     }
 578     if (!descr->tryblock_count) return ExceptionContinueSearch;
 579
 580     if (rec->ExceptionCode == CXX_EXCEPTION)
 581     {
 582         exc_type = (cxx_exception_type *)rec->ExceptionInformation[2];
 583
 584         if (TRACE_ON(seh))
 585         {
 586             TRACE("handling C++ exception rec %p frame %lx descr %p\n", rec, frame,  descr);
 587             dump_exception_type(exc_type, rec->ExceptionInformation[3]);
 588             dump_function_descr(descr, dispatch->ImageBase);
 589         }
 590     }
 591     else
 592     {
 593         thread_data_t *data = msvcrt_get_thread_data();
 594
 595         exc_type = NULL;
 596         TRACE("handling C exception code %x rec %p frame %lx descr %p\n",
 597                 rec->ExceptionCode, rec, frame, descr);
 598
 599         if (data->se_translator) {
 600             EXCEPTION_POINTERS except_ptrs;
 601             se_translator_ctx ctx;
 602
 603             ctx.dest_frame = frame;
 604             ctx.orig_frame = orig_frame;
 605             ctx.seh_rec    = rec;
 606             ctx.dispatch   = dispatch;
 607             ctx.descr      = descr;
 608             __TRY
 609             {
 610                 except_ptrs.ExceptionRecord = rec;
 611                 except_ptrs.ContextRecord = context;
 612                 data->se_translator(rec->ExceptionCode, &except_ptrs);
 613             }
 614             __EXCEPT_CTX(se_translation_filter, &ctx)
 615             {
 616             }
 617             __ENDTRY
 618         }
 619     }
 620
 621     find_catch_block(rec, NULL, frame, dispatch, descr, exc_type, orig_frame);
 622     return ExceptionContinueSearch;
 623 }
 624
 625 /*********************************************************************
 626  *              __CxxExceptionFilter (MSVCRT.@)
 627  */
 628 int CDECL __CxxExceptionFilter( PEXCEPTION_POINTERS ptrs,
 629                                 const type_info *ti, int flags, void **copy )
 630 {
 631     FIXME( "%p %p %x %p: not implemented\n", ptrs, ti, flags, copy );
 632     return EXCEPTION_CONTINUE_SEARCH;
 633 }
 634
 635 /*********************************************************************
 636  *              __CxxFrameHandler (MSVCRT.@)
 637  */
 638 EXCEPTION_DISPOSITION CDECL __CxxFrameHandler( EXCEPTION_RECORD *rec, ULONG64 frame,
 639                                                CONTEXT *context, DISPATCHER_CONTEXT *dispatch )
 640 {
 641     TRACE( "%p %lx %p %p\n", rec, frame, context, dispatch );
 642     return cxx_frame_handler( rec, frame, context, dispatch,
 643             rva_to_ptr(*(UINT*)dispatch->HandlerData, dispatch->ImageBase) );
 644 }
 645
 646
 647 /*********************************************************************
 648  *              __CppXcptFilter (MSVCRT.@)
 649  */
 650 int CDECL __CppXcptFilter(NTSTATUS ex, PEXCEPTION_POINTERS ptr)
 651 {
 652     /* only filter c++ exceptions */
 653     if (ex != CXX_EXCEPTION) return EXCEPTION_CONTINUE_SEARCH;
 654     return _XcptFilter( ex, ptr );
 655 }
 656
 657
 658 /*********************************************************************
 659  *              __CxxDetectRethrow (MSVCRT.@)
 660  */
 661 BOOL CDECL __CxxDetectRethrow(PEXCEPTION_POINTERS ptrs)
 662 {
 663     PEXCEPTION_RECORD rec;
 664
 665     if (!ptrs)
 666         return FALSE;
 667
 668     rec = ptrs->ExceptionRecord;
 669
 670     if (rec->ExceptionCode == CXX_EXCEPTION &&
 671         rec->NumberParameters == 4 &&
 672         rec->ExceptionInformation[0] == CXX_FRAME_MAGIC_VC6 &&
 673         rec->ExceptionInformation[2])
 674     {
 675         ptrs->ExceptionRecord = msvcrt_get_thread_data()->exc_record;
 676         return TRUE;
 677     }
 678     return (msvcrt_get_thread_data()->exc_record == rec);
 679 }
 680
 681
 682 /*********************************************************************
 683  *              __CxxQueryExceptionSize (MSVCRT.@)
 684  */
 685 unsigned int CDECL __CxxQueryExceptionSize(void)
 686 {
 687     return sizeof(cxx_exception_type);
 688 }
 689
 690
 691 /*******************************************************************
 692  *              _setjmp (MSVCRT.@)
 693  */
 694 __ASM_GLOBAL_FUNC( MSVCRT__setjmp,
 695                    "jmp " __ASM_NAME("MSVCRT__setjmpex") );
 696
 697 /*******************************************************************
 698  *              _setjmpex (MSVCRT.@)
 699  */
 700 __ASM_GLOBAL_FUNC( MSVCRT__setjmpex,
 701                    "movq %rdx,(%rcx)\n\t"          /* jmp_buf->Frame */
 702                    "movq %rbx,0x8(%rcx)\n\t"       /* jmp_buf->Rbx */
 703                    "leaq 0x8(%rsp),%rax\n\t"
 704                    "movq %rax,0x10(%rcx)\n\t"      /* jmp_buf->Rsp */
 705                    "movq %rbp,0x18(%rcx)\n\t"      /* jmp_buf->Rbp */
 706                    "movq %rsi,0x20(%rcx)\n\t"      /* jmp_buf->Rsi */
 707                    "movq %rdi,0x28(%rcx)\n\t"      /* jmp_buf->Rdi */
 708                    "movq %r12,0x30(%rcx)\n\t"      /* jmp_buf->R12 */
 709                    "movq %r13,0x38(%rcx)\n\t"      /* jmp_buf->R13 */
 710                    "movq %r14,0x40(%rcx)\n\t"      /* jmp_buf->R14 */
 711                    "movq %r15,0x48(%rcx)\n\t"      /* jmp_buf->R15 */
 712                    "movq (%rsp),%rax\n\t"
 713                    "movq %rax,0x50(%rcx)\n\t"      /* jmp_buf->Rip */
 714                    "movdqa %xmm6,0x60(%rcx)\n\t"   /* jmp_buf->Xmm6 */
 715                    "movdqa %xmm7,0x70(%rcx)\n\t"   /* jmp_buf->Xmm7 */
 716                    "movdqa %xmm8,0x80(%rcx)\n\t"   /* jmp_buf->Xmm8 */
 717                    "movdqa %xmm9,0x90(%rcx)\n\t"   /* jmp_buf->Xmm9 */
 718                    "movdqa %xmm10,0xa0(%rcx)\n\t"  /* jmp_buf->Xmm10 */
 719                    "movdqa %xmm11,0xb0(%rcx)\n\t"  /* jmp_buf->Xmm11 */
 720                    "movdqa %xmm12,0xc0(%rcx)\n\t"  /* jmp_buf->Xmm12 */
 721                    "movdqa %xmm13,0xd0(%rcx)\n\t"  /* jmp_buf->Xmm13 */
 722                    "movdqa %xmm14,0xe0(%rcx)\n\t"  /* jmp_buf->Xmm14 */
 723                    "movdqa %xmm15,0xf0(%rcx)\n\t"  /* jmp_buf->Xmm15 */
 724                    "xorq %rax,%rax\n\t"
 725                    "retq" );
 726
 727
 728 extern void DECLSPEC_NORETURN CDECL longjmp_set_regs( struct MSVCRT___JUMP_BUFFER *jmp, int retval );
 729 __ASM_GLOBAL_FUNC( longjmp_set_regs,
 730                    "movq %rdx,%rax\n\t"            /* retval */
 731                    "movq 0x8(%rcx),%rbx\n\t"       /* jmp_buf->Rbx */
 732                    "movq 0x18(%rcx),%rbp\n\t"      /* jmp_buf->Rbp */
 733                    "movq 0x20(%rcx),%rsi\n\t"      /* jmp_buf->Rsi */
 734                    "movq 0x28(%rcx),%rdi\n\t"      /* jmp_buf->Rdi */
 735                    "movq 0x30(%rcx),%r12\n\t"      /* jmp_buf->R12 */
 736                    "movq 0x38(%rcx),%r13\n\t"      /* jmp_buf->R13 */
 737                    "movq 0x40(%rcx),%r14\n\t"      /* jmp_buf->R14 */
 738                    "movq 0x48(%rcx),%r15\n\t"      /* jmp_buf->R15 */
 739                    "movdqa 0x60(%rcx),%xmm6\n\t"   /* jmp_buf->Xmm6 */
 740                    "movdqa 0x70(%rcx),%xmm7\n\t"   /* jmp_buf->Xmm7 */
 741                    "movdqa 0x80(%rcx),%xmm8\n\t"   /* jmp_buf->Xmm8 */
 742                    "movdqa 0x90(%rcx),%xmm9\n\t"   /* jmp_buf->Xmm9 */
 743                    "movdqa 0xa0(%rcx),%xmm10\n\t"  /* jmp_buf->Xmm10 */
 744                    "movdqa 0xb0(%rcx),%xmm11\n\t"  /* jmp_buf->Xmm11 */
 745                    "movdqa 0xc0(%rcx),%xmm12\n\t"  /* jmp_buf->Xmm12 */
 746                    "movdqa 0xd0(%rcx),%xmm13\n\t"  /* jmp_buf->Xmm13 */
 747                    "movdqa 0xe0(%rcx),%xmm14\n\t"  /* jmp_buf->Xmm14 */
 748                    "movdqa 0xf0(%rcx),%xmm15\n\t"  /* jmp_buf->Xmm15 */
 749                    "movq 0x50(%rcx),%rdx\n\t"      /* jmp_buf->Rip */
 750                    "movq 0x10(%rcx),%rsp\n\t"      /* jmp_buf->Rsp */
 751                    "jmp *%rdx" );
 752
 753 /*******************************************************************
 754  *              longjmp (MSVCRT.@)
 755  */
 756 void __cdecl MSVCRT_longjmp( struct MSVCRT___JUMP_BUFFER *jmp, int retval )
 757 {
 758     EXCEPTION_RECORD rec;
 759
 760     if (!retval) retval = 1;
 761     if (jmp->Frame)
 762     {
 763         rec.ExceptionCode = STATUS_LONGJUMP;
 764         rec.ExceptionFlags = 0;
 765         rec.ExceptionRecord = NULL;
 766         rec.ExceptionAddress = NULL;
 767         rec.NumberParameters = 1;
 768         rec.ExceptionInformation[0] = (DWORD_PTR)jmp;
 769         RtlUnwind( (void *)jmp->Frame, (void *)jmp->Rip, &rec, IntToPtr(retval) );
 770     }
 771     longjmp_set_regs( jmp, retval );
 772 }
 773
 774 /*******************************************************************
 775  *              _local_unwind (MSVCRT.@)
 776  */
 777 void __cdecl _local_unwind( void *frame, void *target )
 778 {
 779     RtlUnwind( frame, target, NULL, 0 );
 780 }
 781
 782 /*********************************************************************
 783  *              _fpieee_flt (MSVCRT.@)
 784  */
 785 int __cdecl _fpieee_flt(ULONG exception_code, EXCEPTION_POINTERS *ep,
 786         int (__cdecl *handler)(_FPIEEE_RECORD*))
 787 {
 788     FIXME("(%x %p %p) opcode: %s\n", exception_code, ep, handler,
 789             wine_dbgstr_longlong(*(ULONG64*)ep->ContextRecord->Rip));
 790     return EXCEPTION_CONTINUE_SEARCH;
 791 }
 792
 793 #endif  /* __x86_64__ */