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 static inline void* rva_to_ptr(UINT rva, ULONG64 base)
 112 {
 113     return rva ? (void*)(base+rva) : NULL;
 114 }
 115
 116 static inline void dump_type(UINT type_rva, ULONG64 base)
 117 {
 118     const cxx_type_info *type = rva_to_ptr(type_rva, base);
 119
 120     TRACE("flags %x type %x %s offsets %d,%d,%d size %d copy ctor %x(%p)\n",
 121             type->flags, type->type_info, dbgstr_type_info(rva_to_ptr(type->type_info, base)),
 122             type->offsets.this_offset, type->offsets.vbase_descr, type->offsets.vbase_offset,
 123             type->size, type->copy_ctor, rva_to_ptr(type->copy_ctor, base));
 124 }
 125
 126 static void dump_exception_type(const cxx_exception_type *type, ULONG64 base)
 127 {
 128     const cxx_type_info_table *type_info_table = rva_to_ptr(type->type_info_table, base);
 129     UINT i;
 130
 131     TRACE("flags %x destr %x(%p) handler %x(%p) type info %x(%p)\n",
 132             type->flags, type->destructor, rva_to_ptr(type->destructor, base),
 133             type->custom_handler, rva_to_ptr(type->custom_handler, base),
 134             type->type_info_table, type_info_table);
 135     for (i = 0; i < type_info_table->count; i++)
 136     {
 137         TRACE("    %d: ", i);
 138         dump_type(type_info_table->info[i], base);
 139     }
 140 }
 141
 142 static void dump_function_descr(const cxx_function_descr *descr, ULONG64 image_base)
 143 {
 144     unwind_info *unwind_table = rva_to_ptr(descr->unwind_table, image_base);
 145     tryblock_info *tryblock = rva_to_ptr(descr->tryblock, image_base);
 146     ipmap_info *ipmap = rva_to_ptr(descr->ipmap, image_base);
 147     UINT i, j;
 148
 149     TRACE("magic %x\n", descr->magic);
 150     TRACE("unwind table: %x(%p) %d\n", descr->unwind_table, unwind_table, descr->unwind_count);
 151     for (i=0; i<descr->unwind_count; i++)
 152     {
 153         TRACE("    %d: prev %d func %x(%p)\n", i, unwind_table[i].prev,
 154                 unwind_table[i].handler, rva_to_ptr(unwind_table[i].handler, image_base));
 155     }
 156     TRACE("try table: %x(%p) %d\n", descr->tryblock, tryblock, descr->tryblock_count);
 157     for (i=0; i<descr->tryblock_count; i++)
 158     {
 159         catchblock_info *catchblock = rva_to_ptr(tryblock[i].catchblock, image_base);
 160
 161         TRACE("    %d: start %d end %d catchlevel %d catch %x(%p) %d\n", i,
 162                 tryblock[i].start_level, tryblock[i].end_level,
 163                 tryblock[i].catch_level, tryblock[i].catchblock,
 164                 catchblock, tryblock[i].catchblock_count);
 165         for (j=0; j<tryblock[i].catchblock_count; j++)
 166         {
 167             TRACE("        %d: flags %x offset %d handler %x(%p) frame %x type %x %s\n",
 168                     j, catchblock[j].flags, catchblock[j].offset, catchblock[j].handler,
 169                     rva_to_ptr(catchblock[j].handler, image_base), catchblock[j].frame,
 170                     catchblock[j].type_info,
 171                     dbgstr_type_info(rva_to_ptr(catchblock[j].type_info, image_base)));
 172         }
 173     }
 174     TRACE("ipmap: %x(%p) %d\n", descr->ipmap, ipmap, descr->ipmap_count);
 175     for (i=0; i<descr->ipmap_count; i++)
 176     {
 177         TRACE("    %d: ip %x state %d\n", i, ipmap[i].ip, ipmap[i].state);
 178     }
 179     TRACE("unwind_help %d\n", descr->unwind_help);
 180     if (descr->magic <= CXX_FRAME_MAGIC_VC6) return;
 181     TRACE("expect list: %x\n", descr->expect_list);
 182     if (descr->magic <= CXX_FRAME_MAGIC_VC7) return;
 183     TRACE("flags: %08x\n", descr->flags);
 184 }
 185
 186 static inline int ip_to_state(ipmap_info *ipmap, UINT count, int ip)
 187 {
 188     UINT low = 0, high = count-1, med;
 189
 190     while (low < high) {
 191         med = low + (high-low)/2;
 192
 193         if (ipmap[med].ip <= ip && ipmap[med+1].ip > ip)
 194         {
 195             low = med;
 196             break;
 197         }
 198         if (ipmap[med].ip < ip) low = med+1;
 199         else high = med-1;
 200     }
 201
 202     TRACE("%x -> %d\n", ip, ipmap[low].state);
 203     return ipmap[low].state;
 204 }
 205
 206 /* check if the exception type is caught by a given catch block, and return the type that matched */
 207 static const cxx_type_info *find_caught_type(cxx_exception_type *exc_type, ULONG64 exc_base,
 208                                              const type_info *catch_ti, UINT catch_flags)
 209 {
 210     const cxx_type_info_table *type_info_table = rva_to_ptr(exc_type->type_info_table, exc_base);
 211     UINT i;
 212
 213     for (i = 0; i < type_info_table->count; i++)
 214     {
 215         const cxx_type_info *type = rva_to_ptr(type_info_table->info[i], exc_base);
 216         const type_info *ti = rva_to_ptr(type->type_info, exc_base);
 217
 218         if (!catch_ti) return type;   /* catch(...) matches any type */
 219         if (catch_ti != ti)
 220         {
 221             if (strcmp( catch_ti->mangled, ti->mangled )) continue;
 222         }
 223         /* type is the same, now check the flags */
 224         if ((exc_type->flags & TYPE_FLAG_CONST) &&
 225                 !(catch_flags & TYPE_FLAG_CONST)) continue;
 226         if ((exc_type->flags & TYPE_FLAG_VOLATILE) &&
 227                 !(catch_flags & TYPE_FLAG_VOLATILE)) continue;
 228         return type;  /* it matched */
 229     }
 230     return NULL;
 231 }
 232
 233 static inline void copy_exception(void *object, ULONG64 frame,
 234                                   DISPATCHER_CONTEXT *dispatch,
 235                                   const catchblock_info *catchblock,
 236                                   const cxx_type_info *type)
 237 {
 238     const type_info *catch_ti = rva_to_ptr(catchblock->type_info, dispatch->ImageBase);
 239     void **dest = rva_to_ptr(catchblock->offset, frame);
 240
 241     if (!catch_ti || !catch_ti->mangled[0]) return;
 242     if (!catchblock->offset) return;
 243
 244     if (catchblock->flags & TYPE_FLAG_REFERENCE)
 245     {
 246         *dest = get_this_pointer(&type->offsets, object);
 247     }
 248     else if (type->flags & CLASS_IS_SIMPLE_TYPE)
 249     {
 250         memmove(dest, object, type->size);
 251         /* if it is a pointer, adjust it */
 252         if (type->size == sizeof(void*)) *dest = get_this_pointer(&type->offsets, *dest);
 253     }
 254     else  /* copy the object */
 255     {
 256         if (type->copy_ctor)
 257         {
 258             if (type->flags & CLASS_HAS_VIRTUAL_BASE_CLASS)
 259             {
 260                 void (__cdecl *copy_ctor)(void*, void*, int) =
 261                     rva_to_ptr(type->copy_ctor, dispatch->ImageBase);
 262                 copy_ctor(dest, get_this_pointer(&type->offsets, object), 1);
 263             }
 264             else
 265             {
 266                 void (__cdecl *copy_ctor)(void*, void*) =
 267                     rva_to_ptr(type->copy_ctor, dispatch->ImageBase);
 268                 copy_ctor(dest, get_this_pointer(&type->offsets, object));
 269             }
 270         }
 271         else
 272             memmove(dest, get_this_pointer(&type->offsets,object), type->size);
 273     }
 274 }
 275
 276 static void cxx_local_unwind(ULONG64 frame, DISPATCHER_CONTEXT *dispatch,
 277                              const cxx_function_descr *descr, int last_level)
 278 {
 279     const unwind_info *unwind_table = rva_to_ptr(descr->unwind_table, dispatch->ImageBase);
 280     void (__cdecl *handler)(ULONG64 unk, ULONG64 rbp);
 281     int *unwind_help = rva_to_ptr(descr->unwind_help, frame);
 282     int trylevel;
 283
 284     if (unwind_help[0] == -2)
 285     {
 286         trylevel = ip_to_state(rva_to_ptr(descr->ipmap, dispatch->ImageBase),
 287                 descr->ipmap_count, dispatch->ControlPc-dispatch->ImageBase);
 288     }
 289     else
 290     {
 291         trylevel = unwind_help[0];
 292     }
 293
 294     TRACE("current level: %d, last level: %d\n", trylevel, last_level);
 295     while (trylevel != last_level)
 296     {
 297         if (trylevel<0 || trylevel>=descr->unwind_count)
 298         {
 299             ERR("invalid trylevel %d\n", trylevel);
 300             MSVCRT_terminate();
 301         }
 302         handler = rva_to_ptr(unwind_table[trylevel].handler, dispatch->ImageBase);
 303         if (handler)
 304         {
 305             TRACE("handler: %p\n", handler);
 306             handler(0, frame);
 307         }
 308         trylevel = unwind_table[trylevel].prev;
 309     }
 310     unwind_help[0] = last_level;
 311 }
 312
 313 static inline void* WINAPI call_catch_block(EXCEPTION_RECORD *rec)
 314 {
 315     ULONG64 frame = rec->ExceptionInformation[1];
 316     const cxx_function_descr *descr = (void*)rec->ExceptionInformation[2];
 317     EXCEPTION_RECORD *prev_rec = (void*)rec->ExceptionInformation[4];
 318     void* (__cdecl *handler)(ULONG64 unk, ULONG64 rbp) = (void*)rec->ExceptionInformation[5];
 319     int *unwind_help = rva_to_ptr(descr->unwind_help, frame);
 320     cxx_frame_info frame_info;
 321     void *ret_addr;
 322
 323     TRACE("calling handler %p\n", handler);
 324
 325     /* FIXME:  native does local_unwind here in case of exception rethrow */
 326     __CxxRegisterExceptionObject(&prev_rec, &frame_info);
 327     ret_addr = handler(0, frame);
 328     __CxxUnregisterExceptionObject(&frame_info, FALSE);
 329     unwind_help[0] = -2;
 330     unwind_help[1] = -1;
 331     return ret_addr;
 332 }
 333
 334 static inline void find_catch_block(EXCEPTION_RECORD *rec, ULONG64 frame,
 335                                     DISPATCHER_CONTEXT *dispatch,
 336                                     const cxx_function_descr *descr,
 337                                     cxx_exception_type *info)
 338 {
 339     ULONG64 exc_base = (rec->NumberParameters == 4 ? rec->ExceptionInformation[3] : 0);
 340     int trylevel = ip_to_state(rva_to_ptr(descr->ipmap, dispatch->ImageBase),
 341             descr->ipmap_count, dispatch->ControlPc-dispatch->ImageBase);
 342     const tryblock_info *in_catch;
 343     EXCEPTION_RECORD catch_record;
 344     CONTEXT context;
 345     UINT i, j;
 346     ULONG64 orig_frame = frame, throw_base;
 347     DWORD throw_func_off;
 348     void *throw_func;
 349     INT *unwind_help;
 350
 351     /* update orig_frame if it's a nested exception */
 352     throw_func_off = RtlLookupFunctionEntry(dispatch->ControlPc, &throw_base, NULL)->BeginAddress;
 353     throw_func = rva_to_ptr(throw_func_off, throw_base);
 354     TRACE("reconstructed handler pointer: %p\n", throw_func);
 355     for (i=descr->tryblock_count; i>0; i--)
 356     {
 357         const tryblock_info *tryblock = rva_to_ptr(descr->tryblock, dispatch->ImageBase);
 358         tryblock = &tryblock[i-1];
 359
 360         if (trylevel>tryblock->end_level && trylevel<=tryblock->catch_level)
 361         {
 362             for (j=0; j<tryblock->catchblock_count; j++)
 363             {
 364                 /* TODO: is it possible to have the same handler for multiple catch blocks? */
 365                 const catchblock_info *catchblock = rva_to_ptr(tryblock->catchblock, dispatch->ImageBase);
 366                 catchblock = &catchblock[j];
 367
 368                 if (rva_to_ptr(catchblock->handler, dispatch->ImageBase) == throw_func)
 369                 {
 370                     TRACE("nested exception detected\n");
 371                     orig_frame = *(ULONG64*)rva_to_ptr(catchblock->frame, frame);
 372                     TRACE("setting orig_frame to %lx\n", orig_frame);
 373                 }
 374             }
 375         }
 376     }
 377
 378     for (i=descr->tryblock_count; i>0; i--)
 379     {
 380         in_catch = rva_to_ptr(descr->tryblock, dispatch->ImageBase);
 381         in_catch = &in_catch[i-1];
 382
 383         if (trylevel>in_catch->end_level && trylevel<=in_catch->catch_level)
 384             break;
 385     }
 386     if (!i)
 387         in_catch = NULL;
 388
 389     unwind_help = rva_to_ptr(descr->unwind_help, orig_frame);
 390     if (trylevel > unwind_help[1])
 391         unwind_help[0] = unwind_help[1] = trylevel;
 392     else
 393         trylevel = unwind_help[1];
 394     TRACE("current trylevel: %d\n", trylevel);
 395
 396     for (i=0; i<descr->tryblock_count; i++)
 397     {
 398         const tryblock_info *tryblock = rva_to_ptr(descr->tryblock, dispatch->ImageBase);
 399         tryblock = &tryblock[i];
 400
 401         if (trylevel < tryblock->start_level) continue;
 402         if (trylevel > tryblock->end_level) continue;
 403
 404         if (in_catch)
 405         {
 406             if(tryblock->start_level <= in_catch->end_level) continue;
 407             if(tryblock->end_level > in_catch->catch_level) continue;
 408         }
 409
 410         /* got a try block */
 411         for (j=0; j<tryblock->catchblock_count; j++)
 412         {
 413             const catchblock_info *catchblock = rva_to_ptr(tryblock->catchblock, dispatch->ImageBase);
 414             catchblock = &catchblock[j];
 415
 416             if (info)
 417             {
 418                 const cxx_type_info *type = find_caught_type(info, exc_base,
 419                         rva_to_ptr(catchblock->type_info, dispatch->ImageBase),
 420                         catchblock->flags);
 421                 if (!type) continue;
 422
 423                 TRACE("matched type %p in tryblock %d catchblock %d\n", type, i, j);
 424
 425                 /* copy the exception to its destination on the stack */
 426                 copy_exception((void*)rec->ExceptionInformation[1],
 427                         orig_frame, dispatch, catchblock, type);
 428             }
 429             else
 430             {
 431                 /* no CXX_EXCEPTION only proceed with a catch(...) block*/
 432                 if (catchblock->type_info)
 433                     continue;
 434                 TRACE("found catch(...) block\n");
 435             }
 436
 437             /* unwind stack and call catch */
 438             memset(&catch_record, 0, sizeof(catch_record));
 439             catch_record.ExceptionCode = STATUS_UNWIND_CONSOLIDATE;
 440             catch_record.ExceptionFlags = EXCEPTION_NONCONTINUABLE;
 441             catch_record.NumberParameters = 6;
 442             catch_record.ExceptionInformation[0] = (ULONG_PTR)call_catch_block;
 443             catch_record.ExceptionInformation[1] = orig_frame;
 444             catch_record.ExceptionInformation[2] = (ULONG_PTR)descr;
 445             catch_record.ExceptionInformation[3] = tryblock->start_level;
 446             catch_record.ExceptionInformation[4] = (ULONG_PTR)rec;
 447             catch_record.ExceptionInformation[5] =
 448                 (ULONG_PTR)rva_to_ptr(catchblock->handler, dispatch->ImageBase);
 449             RtlUnwindEx((void*)frame, (void*)dispatch->ControlPc, &catch_record, NULL, &context, NULL);
 450         }
 451     }
 452
 453     TRACE("no matching catch block found\n");
 454 }
 455
 456 static DWORD cxx_frame_handler(EXCEPTION_RECORD *rec, ULONG64 frame,
 457                                CONTEXT *context, DISPATCHER_CONTEXT *dispatch,
 458                                const cxx_function_descr *descr)
 459 {
 460     cxx_exception_type *exc_type;
 461
 462     if (descr->magic<CXX_FRAME_MAGIC_VC6 || descr->magic>CXX_FRAME_MAGIC_VC8)
 463     {
 464         FIXME("unhandled frame magic %x\n", descr->magic);
 465         return ExceptionContinueSearch;
 466     }
 467
 468     if (rec->ExceptionFlags & (EH_UNWINDING|EH_EXIT_UNWIND))
 469     {
 470         if (rec->ExceptionCode==STATUS_UNWIND_CONSOLIDATE && rec->NumberParameters==6 &&
 471                 rec->ExceptionInformation[0]==(ULONG_PTR)call_catch_block)
 472         {
 473             EXCEPTION_RECORD *new_rec = (void*)rec->ExceptionInformation[4];
 474             thread_data_t *data = msvcrt_get_thread_data();
 475             frame_info *cur;
 476
 477             if (rec->ExceptionFlags & EH_TARGET_UNWIND)
 478             {
 479                 ULONG64 orig_frame = rec->ExceptionInformation[1];
 480                 const cxx_function_descr *orig_descr = (void*)rec->ExceptionInformation[2];
 481                 int end_level = rec->ExceptionInformation[3];
 482
 483                 cxx_local_unwind(orig_frame, dispatch, orig_descr, end_level);
 484             }
 485             else
 486                 cxx_local_unwind(frame, dispatch, descr, -1);
 487
 488             /* FIXME: we should only unregister frames registered by call_catch_block here */
 489             for (cur = data->frame_info_head; cur; cur = cur->next)
 490             {
 491                 if ((ULONG64)cur <= frame)
 492                 {
 493                     __CxxUnregisterExceptionObject((cxx_frame_info*)cur,
 494                             new_rec->ExceptionCode == CXX_EXCEPTION &&
 495                             data->exc_record->ExceptionCode == CXX_EXCEPTION &&
 496                             new_rec->ExceptionInformation[1] == data->exc_record->ExceptionInformation[1]);
 497                 }
 498             }
 499             return ExceptionContinueSearch;
 500         }
 501
 502         cxx_local_unwind(frame, dispatch, descr, -1);
 503         return ExceptionContinueSearch;
 504     }
 505     if (!descr->tryblock_count) return ExceptionContinueSearch;
 506
 507     if (rec->ExceptionCode == CXX_EXCEPTION &&
 508             rec->ExceptionInformation[1] == 0 && rec->ExceptionInformation[2] == 0)
 509     {
 510         *rec = *msvcrt_get_thread_data()->exc_record;
 511         rec->ExceptionFlags &= ~EH_UNWINDING;
 512         if (TRACE_ON(seh)) {
 513             TRACE("detect rethrow: exception code: %x\n", rec->ExceptionCode);
 514             if (rec->ExceptionCode == CXX_EXCEPTION)
 515                 TRACE("re-propage: obj: %lx, type: %lx\n",
 516                         rec->ExceptionInformation[1], rec->ExceptionInformation[2]);
 517         }
 518     }
 519
 520     if (rec->ExceptionCode == CXX_EXCEPTION)
 521     {
 522         exc_type = (cxx_exception_type *)rec->ExceptionInformation[2];
 523
 524         if (TRACE_ON(seh))
 525         {
 526             TRACE("handling C++ exception rec %p frame %lx descr %p\n", rec, frame,  descr);
 527             dump_exception_type(exc_type, rec->ExceptionInformation[3]);
 528             dump_function_descr(descr, dispatch->ImageBase);
 529         }
 530     }
 531     else
 532     {
 533         thread_data_t *data = msvcrt_get_thread_data();
 534
 535         exc_type = NULL;
 536         TRACE("handling C exception code %x rec %p frame %lx descr %p\n",
 537                 rec->ExceptionCode, rec, frame, descr);
 538
 539         if (data->se_translator) {
 540             EXCEPTION_POINTERS except_ptrs;
 541
 542             except_ptrs.ExceptionRecord = rec;
 543             except_ptrs.ContextRecord = context;
 544             data->se_translator(rec->ExceptionCode, &except_ptrs);
 545         }
 546     }
 547
 548     find_catch_block(rec, frame, dispatch, descr, exc_type);
 549     return ExceptionContinueSearch;
 550 }
 551
 552 /*********************************************************************
 553  *              __CxxExceptionFilter (MSVCRT.@)
 554  */
 555 int CDECL __CxxExceptionFilter( PEXCEPTION_POINTERS ptrs,
 556                                 const type_info *ti, int flags, void **copy )
 557 {
 558     FIXME( "%p %p %x %p: not implemented\n", ptrs, ti, flags, copy );
 559     return EXCEPTION_CONTINUE_SEARCH;
 560 }
 561
 562 /*********************************************************************
 563  *              __CxxFrameHandler (MSVCRT.@)
 564  */
 565 EXCEPTION_DISPOSITION CDECL __CxxFrameHandler( EXCEPTION_RECORD *rec, ULONG64 frame,
 566                                                CONTEXT *context, DISPATCHER_CONTEXT *dispatch )
 567 {
 568     TRACE( "%p %lx %p %p\n", rec, frame, context, dispatch );
 569     return cxx_frame_handler( rec, frame, context, dispatch,
 570             rva_to_ptr(*(UINT*)dispatch->HandlerData, dispatch->ImageBase) );
 571 }
 572
 573
 574 /*********************************************************************
 575  *              __CppXcptFilter (MSVCRT.@)
 576  */
 577 int CDECL __CppXcptFilter(NTSTATUS ex, PEXCEPTION_POINTERS ptr)
 578 {
 579     /* only filter c++ exceptions */
 580     if (ex != CXX_EXCEPTION) return EXCEPTION_CONTINUE_SEARCH;
 581     return _XcptFilter( ex, ptr );
 582 }
 583
 584
 585 /*********************************************************************
 586  *              __CxxDetectRethrow (MSVCRT.@)
 587  */
 588 BOOL CDECL __CxxDetectRethrow(PEXCEPTION_POINTERS ptrs)
 589 {
 590     PEXCEPTION_RECORD rec;
 591
 592     if (!ptrs)
 593         return FALSE;
 594
 595     rec = ptrs->ExceptionRecord;
 596
 597     if (rec->ExceptionCode == CXX_EXCEPTION &&
 598         rec->NumberParameters == 4 &&
 599         rec->ExceptionInformation[0] == CXX_FRAME_MAGIC_VC6 &&
 600         rec->ExceptionInformation[2])
 601     {
 602         ptrs->ExceptionRecord = msvcrt_get_thread_data()->exc_record;
 603         return TRUE;
 604     }
 605     return (msvcrt_get_thread_data()->exc_record == rec);
 606 }
 607
 608
 609 /*********************************************************************
 610  *              __CxxQueryExceptionSize (MSVCRT.@)
 611  */
 612 unsigned int CDECL __CxxQueryExceptionSize(void)
 613 {
 614     return sizeof(cxx_exception_type);
 615 }
 616
 617
 618 /*******************************************************************
 619  *              _setjmp (MSVCRT.@)
 620  */
 621 __ASM_GLOBAL_FUNC( MSVCRT__setjmp,
 622                    "jmp " __ASM_NAME("MSVCRT__setjmpex") );
 623
 624 /*******************************************************************
 625  *              _setjmpex (MSVCRT.@)
 626  */
 627 __ASM_GLOBAL_FUNC( MSVCRT__setjmpex,
 628                    "movq %rdx,(%rcx)\n\t"          /* jmp_buf->Frame */
 629                    "movq %rbx,0x8(%rcx)\n\t"       /* jmp_buf->Rbx */
 630                    "leaq 0x8(%rsp),%rax\n\t"
 631                    "movq %rax,0x10(%rcx)\n\t"      /* jmp_buf->Rsp */
 632                    "movq %rbp,0x18(%rcx)\n\t"      /* jmp_buf->Rbp */
 633                    "movq %rsi,0x20(%rcx)\n\t"      /* jmp_buf->Rsi */
 634                    "movq %rdi,0x28(%rcx)\n\t"      /* jmp_buf->Rdi */
 635                    "movq %r12,0x30(%rcx)\n\t"      /* jmp_buf->R12 */
 636                    "movq %r13,0x38(%rcx)\n\t"      /* jmp_buf->R13 */
 637                    "movq %r14,0x40(%rcx)\n\t"      /* jmp_buf->R14 */
 638                    "movq %r15,0x48(%rcx)\n\t"      /* jmp_buf->R15 */
 639                    "movq (%rsp),%rax\n\t"
 640                    "movq %rax,0x50(%rcx)\n\t"      /* jmp_buf->Rip */
 641                    "movdqa %xmm6,0x60(%rcx)\n\t"   /* jmp_buf->Xmm6 */
 642                    "movdqa %xmm7,0x70(%rcx)\n\t"   /* jmp_buf->Xmm7 */
 643                    "movdqa %xmm8,0x80(%rcx)\n\t"   /* jmp_buf->Xmm8 */
 644                    "movdqa %xmm9,0x90(%rcx)\n\t"   /* jmp_buf->Xmm9 */
 645                    "movdqa %xmm10,0xa0(%rcx)\n\t"  /* jmp_buf->Xmm10 */
 646                    "movdqa %xmm11,0xb0(%rcx)\n\t"  /* jmp_buf->Xmm11 */
 647                    "movdqa %xmm12,0xc0(%rcx)\n\t"  /* jmp_buf->Xmm12 */
 648                    "movdqa %xmm13,0xd0(%rcx)\n\t"  /* jmp_buf->Xmm13 */
 649                    "movdqa %xmm14,0xe0(%rcx)\n\t"  /* jmp_buf->Xmm14 */
 650                    "movdqa %xmm15,0xf0(%rcx)\n\t"  /* jmp_buf->Xmm15 */
 651                    "xorq %rax,%rax\n\t"
 652                    "retq" );
 653
 654
 655 extern void DECLSPEC_NORETURN CDECL longjmp_set_regs( struct MSVCRT___JUMP_BUFFER *jmp, int retval );
 656 __ASM_GLOBAL_FUNC( longjmp_set_regs,
 657                    "movq %rdx,%rax\n\t"            /* retval */
 658                    "movq 0x8(%rcx),%rbx\n\t"       /* jmp_buf->Rbx */
 659                    "movq 0x18(%rcx),%rbp\n\t"      /* jmp_buf->Rbp */
 660                    "movq 0x20(%rcx),%rsi\n\t"      /* jmp_buf->Rsi */
 661                    "movq 0x28(%rcx),%rdi\n\t"      /* jmp_buf->Rdi */
 662                    "movq 0x30(%rcx),%r12\n\t"      /* jmp_buf->R12 */
 663                    "movq 0x38(%rcx),%r13\n\t"      /* jmp_buf->R13 */
 664                    "movq 0x40(%rcx),%r14\n\t"      /* jmp_buf->R14 */
 665                    "movq 0x48(%rcx),%r15\n\t"      /* jmp_buf->R15 */
 666                    "movdqa 0x60(%rcx),%xmm6\n\t"   /* jmp_buf->Xmm6 */
 667                    "movdqa 0x70(%rcx),%xmm7\n\t"   /* jmp_buf->Xmm7 */
 668                    "movdqa 0x80(%rcx),%xmm8\n\t"   /* jmp_buf->Xmm8 */
 669                    "movdqa 0x90(%rcx),%xmm9\n\t"   /* jmp_buf->Xmm9 */
 670                    "movdqa 0xa0(%rcx),%xmm10\n\t"  /* jmp_buf->Xmm10 */
 671                    "movdqa 0xb0(%rcx),%xmm11\n\t"  /* jmp_buf->Xmm11 */
 672                    "movdqa 0xc0(%rcx),%xmm12\n\t"  /* jmp_buf->Xmm12 */
 673                    "movdqa 0xd0(%rcx),%xmm13\n\t"  /* jmp_buf->Xmm13 */
 674                    "movdqa 0xe0(%rcx),%xmm14\n\t"  /* jmp_buf->Xmm14 */
 675                    "movdqa 0xf0(%rcx),%xmm15\n\t"  /* jmp_buf->Xmm15 */
 676                    "movq 0x50(%rcx),%rdx\n\t"      /* jmp_buf->Rip */
 677                    "movq 0x10(%rcx),%rsp\n\t"      /* jmp_buf->Rsp */
 678                    "jmp *%rdx" );
 679
 680 /*******************************************************************
 681  *              longjmp (MSVCRT.@)
 682  */
 683 void __cdecl MSVCRT_longjmp( struct MSVCRT___JUMP_BUFFER *jmp, int retval )
 684 {
 685     EXCEPTION_RECORD rec;
 686
 687     if (!retval) retval = 1;
 688     if (jmp->Frame)
 689     {
 690         rec.ExceptionCode = STATUS_LONGJUMP;
 691         rec.ExceptionFlags = 0;
 692         rec.ExceptionRecord = NULL;
 693         rec.ExceptionAddress = NULL;
 694         rec.NumberParameters = 1;
 695         rec.ExceptionInformation[0] = (DWORD_PTR)jmp;
 696         RtlUnwind( (void *)jmp->Frame, (void *)jmp->Rip, &rec, IntToPtr(retval) );
 697     }
 698     longjmp_set_regs( jmp, retval );
 699 }
 700
 701 /*******************************************************************
 702  *              _local_unwind (MSVCRT.@)
 703  */
 704 void __cdecl _local_unwind( void *frame, void *target )
 705 {
 706     RtlUnwind( frame, target, NULL, 0 );
 707 }
 708
 709 /*********************************************************************
 710  *              _fpieee_flt (MSVCRT.@)
 711  */
 712 int __cdecl _fpieee_flt(ULONG exception_code, EXCEPTION_POINTERS *ep,
 713         int (__cdecl *handler)(_FPIEEE_RECORD*))
 714 {
 715     FIXME("(%x %p %p) opcode: %s\n", exception_code, ep, handler,
 716             wine_dbgstr_longlong(*(ULONG64*)ep->ContextRecord->Rip));
 717     return EXCEPTION_CONTINUE_SEARCH;
 718 }
 719
 720 #endif  /* __x86_64__ */