dll/win32/dbghelp/pe_module.c

   1 /*
   2  * File pe_module.c - handle PE module information
   3  *
   4  * Copyright (C) 1996,      Eric Youngdale.
   5  * Copyright (C) 1999-2000, Ulrich Weigand.
   6  * Copyright (C) 2004-2007, Eric Pouech.
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  21  *
  22  */
  23
  24 #include "dbghelp_private.h"
  25
  26 WINE_DEFAULT_DEBUG_CHANNEL(dbghelp);
  27
  28 struct pe_module_info
  29 {
  30     struct image_file_map       fmap;
  31 };
  32
  33 static void* pe_map_full(struct image_file_map* fmap, IMAGE_NT_HEADERS** nth)
  34 {
  35     if (!fmap->u.pe.full_map)
  36     {
  37         fmap->u.pe.full_map = MapViewOfFile(fmap->u.pe.hMap, FILE_MAP_READ, 0, 0, 0);
  38     }
  39     if (fmap->u.pe.full_map)
  40     {
  41         if (nth) *nth = RtlImageNtHeader(fmap->u.pe.full_map);
  42         fmap->u.pe.full_count++;
  43         return fmap->u.pe.full_map;
  44     }
  45     return IMAGE_NO_MAP;
  46 }
  47
  48 static void pe_unmap_full(struct image_file_map* fmap)
  49 {
  50     if (fmap->u.pe.full_count && !--fmap->u.pe.full_count)
  51     {
  52         UnmapViewOfFile(fmap->u.pe.full_map);
  53         fmap->u.pe.full_map = NULL;
  54     }
  55 }
  56
  57 /******************************************************************
  58  *              pe_map_section
  59  *
  60  * Maps a single section into memory from an PE file
  61  */
  62 const char* pe_map_section(struct image_section_map* ism)
  63 {
  64     void*       mapping;
  65     struct pe_file_map* fmap = &ism->fmap->u.pe;
  66
  67     if (ism->sidx >= 0 && ism->sidx < fmap->ntheader.FileHeader.NumberOfSections &&
  68         fmap->sect[ism->sidx].mapped == IMAGE_NO_MAP)
  69     {
  70         IMAGE_NT_HEADERS*       nth;
  71
  72         if (fmap->sect[ism->sidx].shdr.Misc.VirtualSize > fmap->sect[ism->sidx].shdr.SizeOfRawData)
  73         {
  74             FIXME("Section %ld: virtual (0x%x) > raw (0x%x) size - not supported\n",
  75                   ism->sidx, fmap->sect[ism->sidx].shdr.Misc.VirtualSize,
  76                   fmap->sect[ism->sidx].shdr.SizeOfRawData);
  77             return IMAGE_NO_MAP;
  78         }
  79         /* FIXME: that's rather drastic, but that will do for now
  80          * that's ok if the full file map exists, but we could be less aggressive otherwise and
  81          * only map the relevant section
  82          */
  83         if ((mapping = pe_map_full(ism->fmap, &nth)))
  84         {
  85             fmap->sect[ism->sidx].mapped = RtlImageRvaToVa(nth, mapping,
  86                                                            fmap->sect[ism->sidx].shdr.VirtualAddress,
  87                                                            NULL);
  88             return fmap->sect[ism->sidx].mapped;
  89         }
  90     }
  91     return IMAGE_NO_MAP;
  92 }
  93
  94 /******************************************************************
  95  *              pe_find_section
  96  *
  97  * Finds a section by name (and type) into memory from an PE file
  98  * or its alternate if any
  99  */
 100 BOOL pe_find_section(struct image_file_map* fmap, const char* name,
 101                      struct image_section_map* ism)
 102 {
 103     const char*                 sectname;
 104     unsigned                    i;
 105     char                        tmp[IMAGE_SIZEOF_SHORT_NAME + 1];
 106
 107     for (i = 0; i < fmap->u.pe.ntheader.FileHeader.NumberOfSections; i++)
 108     {
 109         sectname = (const char*)fmap->u.pe.sect[i].shdr.Name;
 110         /* long section names start with a '/' (at least on MinGW32) */
 111         if (sectname[0] == '/' && fmap->u.pe.strtable)
 112             sectname = fmap->u.pe.strtable + atoi(sectname + 1);
 113         else
 114         {
 115             /* the section name may not be null terminated */
 116             sectname = memcpy(tmp, sectname, IMAGE_SIZEOF_SHORT_NAME);
 117             tmp[IMAGE_SIZEOF_SHORT_NAME] = '\0';
 118         }
 119         if (!strcasecmp(sectname, name))
 120         {
 121             ism->fmap = fmap;
 122             ism->sidx = i;
 123             return TRUE;
 124         }
 125     }
 126     ism->fmap = NULL;
 127     ism->sidx = -1;
 128
 129     return FALSE;
 130 }
 131
 132 /******************************************************************
 133  *              pe_unmap_section
 134  *
 135  * Unmaps a single section from memory
 136  */
 137 void pe_unmap_section(struct image_section_map* ism)
 138 {
 139     if (ism->sidx >= 0 && ism->sidx < ism->fmap->u.pe.ntheader.FileHeader.NumberOfSections &&
 140         ism->fmap->u.pe.sect[ism->sidx].mapped != IMAGE_NO_MAP)
 141     {
 142         pe_unmap_full(ism->fmap);
 143         ism->fmap->u.pe.sect[ism->sidx].mapped = IMAGE_NO_MAP;
 144     }
 145 }
 146
 147 /******************************************************************
 148  *              pe_get_map_rva
 149  *
 150  * Get the RVA of an PE section
 151  */
 152 DWORD_PTR pe_get_map_rva(const struct image_section_map* ism)
 153 {
 154     if (ism->sidx < 0 || ism->sidx >= ism->fmap->u.pe.ntheader.FileHeader.NumberOfSections)
 155         return 0;
 156     return ism->fmap->u.pe.sect[ism->sidx].shdr.VirtualAddress;
 157 }
 158
 159 /******************************************************************
 160  *              pe_get_map_size
 161  *
 162  * Get the size of a PE section
 163  */
 164 unsigned pe_get_map_size(const struct image_section_map* ism)
 165 {
 166     if (ism->sidx < 0 || ism->sidx >= ism->fmap->u.pe.ntheader.FileHeader.NumberOfSections)
 167         return 0;
 168     return ism->fmap->u.pe.sect[ism->sidx].shdr.Misc.VirtualSize;
 169 }
 170
 171 /******************************************************************
 172  *              pe_is_valid_pointer_table
 173  *
 174  * Checks whether the PointerToSymbolTable and NumberOfSymbols in file_header contain
 175  * valid information.
 176  */
 177 static BOOL pe_is_valid_pointer_table(const IMAGE_NT_HEADERS* nthdr, const void* mapping, DWORD64 sz)
 178 {
 179     DWORD64     offset;
 180
 181     /* is the iSym table inside file size ? (including first DWORD of string table, which is its size) */
 182     offset = (DWORD64)nthdr->FileHeader.PointerToSymbolTable;
 183     offset += (DWORD64)nthdr->FileHeader.NumberOfSymbols * sizeof(IMAGE_SYMBOL);
 184     if (offset + sizeof(DWORD) > sz) return FALSE;
 185     /* is string table (following iSym table) inside file size ? */
 186     offset += *(DWORD*)((const char*)mapping + offset);
 187     return offset <= sz;
 188 }
 189
 190 /******************************************************************
 191  *              pe_map_file
 192  *
 193  * Maps an PE file into memory (and checks it's a real PE file)
 194  */
 195 static BOOL pe_map_file(HANDLE file, struct image_file_map* fmap, enum module_type mt)
 196 {
 197     void*       mapping;
 198
 199     fmap->modtype = mt;
 200     fmap->u.pe.hMap = CreateFileMappingW(file, NULL, PAGE_READONLY, 0, 0, NULL);
 201     if (fmap->u.pe.hMap == 0) return FALSE;
 202     fmap->u.pe.full_count = 0;
 203     fmap->u.pe.full_map = NULL;
 204     if (!(mapping = pe_map_full(fmap, NULL))) goto error;
 205
 206     switch (mt)
 207     {
 208     case DMT_PE:
 209         {
 210             IMAGE_NT_HEADERS*       nthdr;
 211             IMAGE_SECTION_HEADER*   section;
 212             unsigned                i;
 213
 214             if (!(nthdr = RtlImageNtHeader(mapping))) goto error;
 215             memcpy(&fmap->u.pe.ntheader, nthdr, sizeof(fmap->u.pe.ntheader));
 216             switch (nthdr->OptionalHeader.Magic)
 217             {
 218             case 0x10b: fmap->addr_size = 32; break;
 219             case 0x20b: fmap->addr_size = 64; break;
 220             default: return FALSE;
 221             }
 222             section = (IMAGE_SECTION_HEADER*)
 223                 ((char*)&nthdr->OptionalHeader + nthdr->FileHeader.SizeOfOptionalHeader);
 224             fmap->u.pe.sect = HeapAlloc(GetProcessHeap(), 0,
 225                                         nthdr->FileHeader.NumberOfSections * sizeof(fmap->u.pe.sect[0]));
 226             if (!fmap->u.pe.sect) goto error;
 227             for (i = 0; i < nthdr->FileHeader.NumberOfSections; i++)
 228             {
 229                 memcpy(&fmap->u.pe.sect[i].shdr, section + i, sizeof(IMAGE_SECTION_HEADER));
 230                 fmap->u.pe.sect[i].mapped = IMAGE_NO_MAP;
 231             }
 232             if (nthdr->FileHeader.PointerToSymbolTable && nthdr->FileHeader.NumberOfSymbols)
 233             {
 234                 LARGE_INTEGER li;
 235
 236                 if (GetFileSizeEx(file, &li) && pe_is_valid_pointer_table(nthdr, mapping, li.QuadPart))
 237                 {
 238                     /* FIXME ugly: should rather map the relevant content instead of copying it */
 239                     const char* src = (const char*)mapping +
 240                         nthdr->FileHeader.PointerToSymbolTable +
 241                         nthdr->FileHeader.NumberOfSymbols * sizeof(IMAGE_SYMBOL);
 242                     char* dst;
 243                     DWORD sz = *(DWORD*)src;
 244
 245                     if ((dst = HeapAlloc(GetProcessHeap(), 0, sz)))
 246                         memcpy(dst, src, sz);
 247                     fmap->u.pe.strtable = dst;
 248                 }
 249                 else
 250                 {
 251                     WARN("Bad coff table... wipping out\n");
 252                     /* we have bad information here, wipe it out */
 253                     fmap->u.pe.ntheader.FileHeader.PointerToSymbolTable = 0;
 254                     fmap->u.pe.ntheader.FileHeader.NumberOfSymbols = 0;
 255                     fmap->u.pe.strtable = NULL;
 256                 }
 257             }
 258             else fmap->u.pe.strtable = NULL;
 259         }
 260         break;
 261     default: assert(0); goto error;
 262     }
 263     pe_unmap_full(fmap);
 264
 265     return TRUE;
 266 error:
 267     pe_unmap_full(fmap);
 268     CloseHandle(fmap->u.pe.hMap);
 269     return FALSE;
 270 }
 271
 272 /******************************************************************
 273  *              pe_unmap_file
 274  *
 275  * Unmaps an PE file from memory (previously mapped with pe_map_file)
 276  */
 277 static void pe_unmap_file(struct image_file_map* fmap)
 278 {
 279     if (fmap->u.pe.hMap != 0)
 280     {
 281         struct image_section_map  ism;
 282         ism.fmap = fmap;
 283         for (ism.sidx = 0; ism.sidx < fmap->u.pe.ntheader.FileHeader.NumberOfSections; ism.sidx++)
 284         {
 285             pe_unmap_section(&ism);
 286         }
 287         while (fmap->u.pe.full_count) pe_unmap_full(fmap);
 288         HeapFree(GetProcessHeap(), 0, fmap->u.pe.sect);
 289         HeapFree(GetProcessHeap(), 0, (void*)fmap->u.pe.strtable); /* FIXME ugly (see pe_map_file) */
 290         CloseHandle(fmap->u.pe.hMap);
 291         fmap->u.pe.hMap = NULL;
 292     }
 293 }
 294
 295 /******************************************************************
 296  *              pe_map_directory
 297  *
 298  * Maps a directory content out of a PE file
 299  */
 300 const char* pe_map_directory(struct module* module, int dirno, DWORD* size)
 301 {
 302     IMAGE_NT_HEADERS*   nth;
 303     void*               mapping;
 304
 305     if (module->type != DMT_PE || !module->format_info[DFI_PE]) return NULL;
 306     if (dirno >= IMAGE_NUMBEROF_DIRECTORY_ENTRIES ||
 307         !(mapping = pe_map_full(&module->format_info[DFI_PE]->u.pe_info->fmap, &nth)))
 308         return NULL;
 309     if (size) *size = nth->OptionalHeader.DataDirectory[dirno].Size;
 310     return RtlImageRvaToVa(nth, mapping,
 311                            nth->OptionalHeader.DataDirectory[dirno].VirtualAddress, NULL);
 312 }
 313
 314 /******************************************************************
 315  *              pe_unmap_directory
 316  *
 317  * Unmaps a directory content
 318  */
 319 void pe_unmap_directory(struct image_file_map* fmap, int dirno)
 320 {
 321     pe_unmap_full(fmap);
 322 }
 323
 324 static void pe_module_remove(struct process* pcs, struct module_format* modfmt)
 325 {
 326     pe_unmap_file(&modfmt->u.pe_info->fmap);
 327     HeapFree(GetProcessHeap(), 0, modfmt);
 328 }
 329
 330 /******************************************************************
 331  *              pe_locate_with_coff_symbol_table
 332  *
 333  * Use the COFF symbol table (if any) from the IMAGE_FILE_HEADER to set the absolute address
 334  * of global symbols.
 335  * Mingw32 requires this for stabs debug information as address for global variables isn't filled in
 336  * (this is similar to what is done in elf_module.c when using the .symtab ELF section)
 337  */
 338 static BOOL pe_locate_with_coff_symbol_table(struct module* module)
 339 {
 340     struct image_file_map* fmap = &module->format_info[DFI_PE]->u.pe_info->fmap;
 341     const IMAGE_SYMBOL* isym;
 342     int                 i, numsym, naux;
 343     char                tmp[9];
 344     const char*         name;
 345     struct hash_table_iter      hti;
 346     void*               ptr;
 347     struct symt_data*   sym;
 348     const char*         mapping;
 349
 350     numsym = fmap->u.pe.ntheader.FileHeader.NumberOfSymbols;
 351     if (!fmap->u.pe.ntheader.FileHeader.PointerToSymbolTable || !numsym)
 352         return TRUE;
 353     if (!(mapping = pe_map_full(fmap, NULL))) return FALSE;
 354     isym = (const IMAGE_SYMBOL*)(mapping + fmap->u.pe.ntheader.FileHeader.PointerToSymbolTable);
 355
 356     for (i = 0; i < numsym; i+= naux, isym += naux)
 357     {
 358         if (isym->StorageClass == IMAGE_SYM_CLASS_EXTERNAL &&
 359             isym->SectionNumber > 0 && isym->SectionNumber <= fmap->u.pe.ntheader.FileHeader.NumberOfSections)
 360         {
 361             if (isym->N.Name.Short)
 362             {
 363                 name = memcpy(tmp, isym->N.ShortName, 8);
 364                 tmp[8] = '\0';
 365             }
 366             else name = fmap->u.pe.strtable + isym->N.Name.Long;
 367             if (name[0] == '_') name++;
 368             hash_table_iter_init(&module->ht_symbols, &hti, name);
 369             while ((ptr = hash_table_iter_up(&hti)))
 370             {
 371                 sym = GET_ENTRY(ptr, struct symt_data, hash_elt);
 372                 if (sym->symt.tag == SymTagData &&
 373                     (sym->kind == DataIsGlobal || sym->kind == DataIsFileStatic) &&
 374                     sym->u.var.kind == loc_absolute &&
 375                     !strcmp(sym->hash_elt.name, name))
 376                 {
 377                     TRACE("Changing absolute address for %d.%s: %lx -> %s\n",
 378                           isym->SectionNumber, name, sym->u.var.offset,
 379                           wine_dbgstr_longlong(module->module.BaseOfImage +
 380                                                fmap->u.pe.sect[isym->SectionNumber - 1].shdr.VirtualAddress +
 381                                                isym->Value));
 382                     sym->u.var.offset = module->module.BaseOfImage +
 383                         fmap->u.pe.sect[isym->SectionNumber - 1].shdr.VirtualAddress + isym->Value;
 384                     break;
 385                 }
 386             }
 387         }
 388         naux = isym->NumberOfAuxSymbols + 1;
 389     }
 390     pe_unmap_full(fmap);
 391     return TRUE;
 392 }
 393
 394 /******************************************************************
 395  *              pe_load_coff_symbol_table
 396  *
 397  * Load public symbols out of the COFF symbol table (if any).
 398  */
 399 static BOOL pe_load_coff_symbol_table(struct module* module)
 400 {
 401     struct image_file_map* fmap = &module->format_info[DFI_PE]->u.pe_info->fmap;
 402     const IMAGE_SYMBOL* isym;
 403     int                 i, numsym, naux;
 404     const char*         strtable;
 405     char                tmp[9];
 406     const char*         name;
 407     const char*         lastfilename = NULL;
 408     struct symt_compiland*   compiland = NULL;
 409     const IMAGE_SECTION_HEADER* sect;
 410     const char*         mapping;
 411
 412     numsym = fmap->u.pe.ntheader.FileHeader.NumberOfSymbols;
 413     if (!fmap->u.pe.ntheader.FileHeader.PointerToSymbolTable || !numsym)
 414         return TRUE;
 415     if (!(mapping = pe_map_full(fmap, NULL))) return FALSE;
 416     isym = (const IMAGE_SYMBOL*)((const char*)mapping + fmap->u.pe.ntheader.FileHeader.PointerToSymbolTable);
 417     /* FIXME: no way to get strtable size */
 418     strtable = (const char*)&isym[numsym];
 419     sect = IMAGE_FIRST_SECTION(RtlImageNtHeader((HMODULE)mapping));
 420
 421     for (i = 0; i < numsym; i+= naux, isym += naux)
 422     {
 423         if (isym->StorageClass == IMAGE_SYM_CLASS_FILE)
 424         {
 425             lastfilename = (const char*)(isym + 1);
 426             compiland = NULL;
 427         }
 428         if (isym->StorageClass == IMAGE_SYM_CLASS_EXTERNAL &&
 429             isym->SectionNumber > 0 && isym->SectionNumber <= fmap->u.pe.ntheader.FileHeader.NumberOfSections)
 430         {
 431             if (isym->N.Name.Short)
 432             {
 433                 name = memcpy(tmp, isym->N.ShortName, 8);
 434                 tmp[8] = '\0';
 435             }
 436             else name = strtable + isym->N.Name.Long;
 437             if (name[0] == '_') name++;
 438
 439             if (!compiland && lastfilename)
 440                 compiland = symt_new_compiland(module, 0,
 441                                                source_new(module, NULL, lastfilename));
 442
 443             if (!(dbghelp_options & SYMOPT_NO_PUBLICS))
 444                 symt_new_public(module, compiland, name,
 445                                 module->module.BaseOfImage + sect[isym->SectionNumber - 1].VirtualAddress +
 446                                      isym->Value,
 447                                 1);
 448         }
 449         naux = isym->NumberOfAuxSymbols + 1;
 450     }
 451     module->module.SymType = SymCoff;
 452     module->module.LineNumbers = FALSE;
 453     module->module.GlobalSymbols = FALSE;
 454     module->module.TypeInfo = FALSE;
 455     module->module.SourceIndexed = FALSE;
 456     module->module.Publics = TRUE;
 457     pe_unmap_full(fmap);
 458
 459     return TRUE;
 460 }
 461
 462 /******************************************************************
 463  *              pe_load_stabs
 464  *
 465  * look for stabs information in PE header (it's how the mingw compiler provides
 466  * its debugging information)
 467  */
 468 static BOOL pe_load_stabs(const struct process* pcs, struct module* module)
 469 {
 470     struct image_file_map*      fmap = &module->format_info[DFI_PE]->u.pe_info->fmap;
 471     struct image_section_map    sect_stabs, sect_stabstr;
 472     BOOL                        ret = FALSE;
 473
 474     if (pe_find_section(fmap, ".stab", &sect_stabs) && pe_find_section(fmap, ".stabstr", &sect_stabstr))
 475     {
 476         const char* stab;
 477         const char* stabstr;
 478
 479         stab = image_map_section(&sect_stabs);
 480         stabstr = image_map_section(&sect_stabstr);
 481         if (stab != IMAGE_NO_MAP && stabstr != IMAGE_NO_MAP)
 482         {
 483             ret = stabs_parse(module,
 484                               module->module.BaseOfImage - fmap->u.pe.ntheader.OptionalHeader.ImageBase,
 485                               stab, image_get_map_size(&sect_stabs),
 486                               stabstr, image_get_map_size(&sect_stabstr),
 487                               NULL, NULL);
 488         }
 489         image_unmap_section(&sect_stabs);
 490         image_unmap_section(&sect_stabstr);
 491         if (ret) pe_locate_with_coff_symbol_table(module);
 492     }
 493     TRACE("%s the STABS debug info\n", ret ? "successfully loaded" : "failed to load");
 494
 495     return ret;
 496 }
 497
 498 /******************************************************************
 499  *              pe_load_dwarf
 500  *
 501  * look for dwarf information in PE header (it's also a way for the mingw compiler
 502  * to provide its debugging information)
 503  */
 504 static BOOL pe_load_dwarf(struct module* module)
 505 {
 506     struct image_file_map*      fmap = &module->format_info[DFI_PE]->u.pe_info->fmap;
 507     BOOL                        ret = FALSE;
 508
 509     ret = dwarf2_parse(module,
 510                        module->module.BaseOfImage - fmap->u.pe.ntheader.OptionalHeader.ImageBase,
 511                        NULL, /* FIXME: some thunks to deal with ? */
 512                        fmap);
 513     TRACE("%s the DWARF debug info\n", ret ? "successfully loaded" : "failed to load");
 514
 515     return ret;
 516 }
 517
 518 #ifndef DBGHELP_STATIC_LIB
 519 /******************************************************************
 520  *              pe_load_dbg_file
 521  *
 522  * loads a .dbg file
 523  */
 524 static BOOL pe_load_dbg_file(const struct process* pcs, struct module* module,
 525                              const char* dbg_name, DWORD timestamp)
 526 {
 527     char                                tmp[MAX_PATH];
 528     HANDLE                              hFile = INVALID_HANDLE_VALUE, hMap = 0;
 529     const BYTE*                         dbg_mapping = NULL;
 530     BOOL                                ret = FALSE;
 531
 532     TRACE("Processing DBG file %s\n", debugstr_a(dbg_name));
 533
 534     if (path_find_symbol_file(pcs, dbg_name, NULL, timestamp, 0, tmp, &module->module.DbgUnmatched) &&
 535         (hFile = CreateFileA(tmp, GENERIC_READ, FILE_SHARE_READ, NULL,
 536                              OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL)) != INVALID_HANDLE_VALUE &&
 537         ((hMap = CreateFileMappingW(hFile, NULL, PAGE_READONLY, 0, 0, NULL)) != 0) &&
 538         ((dbg_mapping = MapViewOfFile(hMap, FILE_MAP_READ, 0, 0, 0)) != NULL))
 539     {
 540         const IMAGE_SEPARATE_DEBUG_HEADER*      hdr;
 541         const IMAGE_SECTION_HEADER*             sectp;
 542         const IMAGE_DEBUG_DIRECTORY*            dbg;
 543
 544         hdr = (const IMAGE_SEPARATE_DEBUG_HEADER*)dbg_mapping;
 545         /* section headers come immediately after debug header */
 546         sectp = (const IMAGE_SECTION_HEADER*)(hdr + 1);
 547         /* and after that and the exported names comes the debug directory */
 548         dbg = (const IMAGE_DEBUG_DIRECTORY*)
 549             (dbg_mapping + sizeof(*hdr) +
 550              hdr->NumberOfSections * sizeof(IMAGE_SECTION_HEADER) +
 551              hdr->ExportedNamesSize);
 552
 553         ret = pe_load_debug_directory(pcs, module, dbg_mapping, sectp,
 554                                       hdr->NumberOfSections, dbg,
 555                                       hdr->DebugDirectorySize / sizeof(*dbg));
 556     }
 557     else
 558         ERR("Couldn't find .DBG file %s (%s)\n", debugstr_a(dbg_name), debugstr_a(tmp));
 559
 560     if (dbg_mapping) UnmapViewOfFile(dbg_mapping);
 561     if (hMap) CloseHandle(hMap);
 562     if (hFile != INVALID_HANDLE_VALUE) CloseHandle(hFile);
 563     return ret;
 564 }
 565
 566 /******************************************************************
 567  *              pe_load_msc_debug_info
 568  *
 569  * Process MSC debug information in PE file.
 570  */
 571 static BOOL pe_load_msc_debug_info(const struct process* pcs, struct module* module)
 572 {
 573     struct image_file_map*      fmap = &module->format_info[DFI_PE]->u.pe_info->fmap;
 574     BOOL                        ret = FALSE;
 575     const IMAGE_DATA_DIRECTORY* dir;
 576     const IMAGE_DEBUG_DIRECTORY*dbg = NULL;
 577     int                         nDbg;
 578     void*                       mapping;
 579     IMAGE_NT_HEADERS*           nth;
 580
 581     if (!(mapping = pe_map_full(fmap, &nth))) return FALSE;
 582     /* Read in debug directory */
 583     dir = nth->OptionalHeader.DataDirectory + IMAGE_DIRECTORY_ENTRY_DEBUG;
 584     nDbg = dir->Size / sizeof(IMAGE_DEBUG_DIRECTORY);
 585     if (!nDbg) goto done;
 586
 587     dbg = RtlImageRvaToVa(nth, mapping, dir->VirtualAddress, NULL);
 588
 589     /* Parse debug directory */
 590     if (nth->FileHeader.Characteristics & IMAGE_FILE_DEBUG_STRIPPED)
 591     {
 592         /* Debug info is stripped to .DBG file */
 593         const IMAGE_DEBUG_MISC* misc = (const IMAGE_DEBUG_MISC*)
 594             ((const char*)mapping + dbg->PointerToRawData);
 595
 596         if (nDbg != 1 || dbg->Type != IMAGE_DEBUG_TYPE_MISC ||
 597             misc->DataType != IMAGE_DEBUG_MISC_EXENAME)
 598         {
 599             ERR("-Debug info stripped, but no .DBG file in module %s\n",
 600                 debugstr_w(module->module.ModuleName));
 601         }
 602         else
 603         {
 604             ret = pe_load_dbg_file(pcs, module, (const char*)misc->Data, nth->FileHeader.TimeDateStamp);
 605         }
 606     }
 607     else
 608     {
 609         const IMAGE_SECTION_HEADER *sectp = (const IMAGE_SECTION_HEADER*)((const char*)&nth->OptionalHeader + nth->FileHeader.SizeOfOptionalHeader);
 610         /* Debug info is embedded into PE module */
 611         ret = pe_load_debug_directory(pcs, module, mapping, sectp,
 612                                       nth->FileHeader.NumberOfSections, dbg, nDbg);
 613     }
 614 done:
 615     pe_unmap_full(fmap);
 616     return ret;
 617 }
 618 #endif /* DBGHELP_STATIC_LIB */
 619
 620 /***********************************************************************
 621  *                      pe_load_export_debug_info
 622  */
 623 static BOOL pe_load_export_debug_info(const struct process* pcs, struct module* module)
 624 {
 625     struct image_file_map*              fmap = &module->format_info[DFI_PE]->u.pe_info->fmap;
 626     unsigned int                        i;
 627     const IMAGE_EXPORT_DIRECTORY*       exports;
 628     DWORD                               base = module->module.BaseOfImage;
 629     DWORD                               size;
 630     IMAGE_NT_HEADERS*                   nth;
 631     void*                               mapping;
 632
 633     if (dbghelp_options & SYMOPT_NO_PUBLICS) return TRUE;
 634
 635     if (!(mapping = pe_map_full(fmap, &nth))) return FALSE;
 636 #if 0
 637     /* Add start of DLL (better use the (yet unimplemented) Exe SymTag for this) */
 638     /* FIXME: module.ModuleName isn't correctly set yet if it's passed in SymLoadModule */
 639     symt_new_public(module, NULL, module->module.ModuleName, base, 1);
 640 #endif
 641
 642     /* Add entry point */
 643     symt_new_public(module, NULL, "EntryPoint",
 644                     base + nth->OptionalHeader.AddressOfEntryPoint, 1);
 645 #if 0
 646     /* FIXME: we'd better store addresses linked to sections rather than
 647        absolute values */
 648     IMAGE_SECTION_HEADER*       section;
 649     /* Add start of sections */
 650     section = (IMAGE_SECTION_HEADER*)
 651         ((char*)&nth->OptionalHeader + nth->FileHeader.SizeOfOptionalHeader);
 652     for (i = 0; i < nth->FileHeader.NumberOfSections; i++, section++)
 653     {
 654         symt_new_public(module, NULL, section->Name,
 655                         RtlImageRvaToVa(nth, mapping, section->VirtualAddress, NULL), 1);
 656     }
 657 #endif
 658
 659     /* Add exported functions */
 660     if ((exports = RtlImageDirectoryEntryToData(mapping, FALSE,
 661                                                 IMAGE_DIRECTORY_ENTRY_EXPORT, &size)))
 662     {
 663         const WORD*             ordinals = NULL;
 664         const DWORD_PTR*        functions = NULL;
 665         const DWORD*            names = NULL;
 666         unsigned int            j;
 667         char                    buffer[16];
 668
 669         functions = RtlImageRvaToVa(nth, mapping, exports->AddressOfFunctions, NULL);
 670         ordinals  = RtlImageRvaToVa(nth, mapping, exports->AddressOfNameOrdinals, NULL);
 671         names     = RtlImageRvaToVa(nth, mapping, exports->AddressOfNames, NULL);
 672
 673         if (functions && ordinals && names)
 674         {
 675             for (i = 0; i < exports->NumberOfNames; i++)
 676             {
 677                 if (!names[i]) continue;
 678                 symt_new_public(module, NULL,
 679                                 RtlImageRvaToVa(nth, mapping, names[i], NULL),
 680                                 base + functions[ordinals[i]], 1);
 681             }
 682
 683             for (i = 0; i < exports->NumberOfFunctions; i++)
 684             {
 685                 if (!functions[i]) continue;
 686                 /* Check if we already added it with a name */
 687                 for (j = 0; j < exports->NumberOfNames; j++)
 688                     if ((ordinals[j] == i) && names[j]) break;
 689                 if (j < exports->NumberOfNames) continue;
 690                 snprintf(buffer, sizeof(buffer), "%d", i + exports->Base);
 691                 symt_new_public(module, NULL, buffer, base + (DWORD)functions[i], 1);
 692             }
 693         }
 694     }
 695     /* no real debug info, only entry points */
 696     if (module->module.SymType == SymDeferred)
 697         module->module.SymType = SymExport;
 698     pe_unmap_full(fmap);
 699
 700     return TRUE;
 701 }
 702
 703 /******************************************************************
 704  *              pe_load_debug_info
 705  *
 706  */
 707 BOOL pe_load_debug_info(const struct process* pcs, struct module* module)
 708 {
 709     BOOL                ret = FALSE;
 710
 711     if (!(dbghelp_options & SYMOPT_PUBLICS_ONLY))
 712     {
 713         ret = pe_load_stabs(pcs, module);
 714         ret = pe_load_dwarf(module) || ret;
 715         #ifndef DBGHELP_STATIC_LIB
 716         ret = pe_load_msc_debug_info(pcs, module) || ret;
 717         #endif
 718         ret = ret || pe_load_coff_symbol_table(module); /* FIXME */
 719         /* if we still have no debug info (we could only get SymExport at this
 720          * point), then do the SymExport except if we have an ELF container,
 721          * in which case we'll rely on the export's on the ELF side
 722          */
 723     }
 724     /* FIXME shouldn't we check that? if (!module_get_debug(pcs, module)) */
 725     if (pe_load_export_debug_info(pcs, module) && !ret)
 726         ret = TRUE;
 727
 728     return ret;
 729 }
 730
 731 /******************************************************************
 732  *              pe_load_native_module
 733  *
 734  */
 735 struct module* pe_load_native_module(struct process* pcs, const WCHAR* name,
 736                                      HANDLE hFile, DWORD64 base, DWORD size)
 737 {
 738     struct module*              module = NULL;
 739     BOOL                        opened = FALSE;
 740     struct module_format*       modfmt;
 741     WCHAR                       loaded_name[MAX_PATH];
 742
 743     loaded_name[0] = '\0';
 744     if (!hFile)
 745     {
 746         assert(name);
 747
 748         if ((hFile = FindExecutableImageExW(name, pcs->search_path, loaded_name, NULL, NULL)) == NULL)
 749             return NULL;
 750         opened = TRUE;
 751     }
 752     else if (name) strcpyW(loaded_name, name);
 753     else if (dbghelp_options & SYMOPT_DEFERRED_LOADS)
 754         FIXME("Trouble ahead (no module name passed in deferred mode)\n");
 755     if (!(modfmt = HeapAlloc(GetProcessHeap(), 0, sizeof(struct module_format) + sizeof(struct pe_module_info))))
 756         return NULL;
 757     modfmt->u.pe_info = (struct pe_module_info*)(modfmt + 1);
 758     if (pe_map_file(hFile, &modfmt->u.pe_info->fmap, DMT_PE))
 759     {
 760         if (!base) base = modfmt->u.pe_info->fmap.u.pe.ntheader.OptionalHeader.ImageBase;
 761         if (!size) size = modfmt->u.pe_info->fmap.u.pe.ntheader.OptionalHeader.SizeOfImage;
 762
 763         module = module_new(pcs, loaded_name, DMT_PE, FALSE, base, size,
 764                             modfmt->u.pe_info->fmap.u.pe.ntheader.FileHeader.TimeDateStamp,
 765                             modfmt->u.pe_info->fmap.u.pe.ntheader.OptionalHeader.CheckSum);
 766         if (module)
 767         {
 768             modfmt->module = module;
 769             modfmt->remove = pe_module_remove;
 770             modfmt->loc_compute = NULL;
 771
 772             module->format_info[DFI_PE] = modfmt;
 773             if (dbghelp_options & SYMOPT_DEFERRED_LOADS)
 774                 module->module.SymType = SymDeferred;
 775             else
 776                 pe_load_debug_info(pcs, module);
 777             module->reloc_delta = base - modfmt->u.pe_info->fmap.u.pe.ntheader.OptionalHeader.ImageBase;
 778         }
 779         else
 780         {
 781             ERR("could not load the module '%s'\n", debugstr_w(loaded_name));
 782             pe_unmap_file(&modfmt->u.pe_info->fmap);
 783         }
 784     }
 785     if (!module) HeapFree(GetProcessHeap(), 0, modfmt);
 786
 787     if (opened) CloseHandle(hFile);
 788
 789     return module;
 790 }
 791
 792 /******************************************************************
 793  *              pe_load_nt_header
 794  *
 795  */
 796 BOOL pe_load_nt_header(HANDLE hProc, DWORD64 base, IMAGE_NT_HEADERS* nth)
 797 {
 798     IMAGE_DOS_HEADER    dos;
 799
 800     return ReadProcessMemory(hProc, (char*)(DWORD_PTR)base, &dos, sizeof(dos), NULL) &&
 801         dos.e_magic == IMAGE_DOS_SIGNATURE &&
 802         ReadProcessMemory(hProc, (char*)(DWORD_PTR)(base + dos.e_lfanew),
 803                           nth, sizeof(*nth), NULL) &&
 804         nth->Signature == IMAGE_NT_SIGNATURE;
 805 }
 806
 807 /******************************************************************
 808  *              pe_load_builtin_module
 809  *
 810  */
 811 struct module* pe_load_builtin_module(struct process* pcs, const WCHAR* name,
 812                                       DWORD64 base, DWORD64 size)
 813 {
 814     struct module*      module = NULL;
 815
 816     if (base && pcs->dbg_hdr_addr)
 817     {
 818         IMAGE_NT_HEADERS    nth;
 819
 820         if (pe_load_nt_header(pcs->handle, base, &nth))
 821         {
 822             if (!size) size = nth.OptionalHeader.SizeOfImage;
 823             module = module_new(pcs, name, DMT_PE, FALSE, base, size,
 824                                 nth.FileHeader.TimeDateStamp,
 825                                 nth.OptionalHeader.CheckSum);
 826         }
 827     }
 828     return module;
 829 }
 830
 831 /***********************************************************************
 832  *           ImageDirectoryEntryToDataEx (DBGHELP.@)
 833  *
 834  * Search for specified directory in PE image
 835  *
 836  * PARAMS
 837  *
 838  *   base    [in]  Image base address
 839  *   image   [in]  TRUE - image has been loaded by loader, FALSE - raw file image
 840  *   dir     [in]  Target directory index
 841  *   size    [out] Receives directory size
 842  *   section [out] Receives pointer to section header of section containing directory data
 843  *
 844  * RETURNS
 845  *   Success: pointer to directory data
 846  *   Failure: NULL
 847  *
 848  */
 849 PVOID WINAPI ImageDirectoryEntryToDataEx( PVOID base, BOOLEAN image, USHORT dir, PULONG size, PIMAGE_SECTION_HEADER *section )
 850 {
 851     const IMAGE_NT_HEADERS *nt;
 852     DWORD addr;
 853
 854     *size = 0;
 855     if (section) *section = NULL;
 856
 857     if (!(nt = RtlImageNtHeader( base ))) return NULL;
 858     if (dir >= nt->OptionalHeader.NumberOfRvaAndSizes) return NULL;
 859     if (!(addr = nt->OptionalHeader.DataDirectory[dir].VirtualAddress)) return NULL;
 860
 861     *size = nt->OptionalHeader.DataDirectory[dir].Size;
 862     if (image || addr < nt->OptionalHeader.SizeOfHeaders) return (char *)base + addr;
 863
 864     return RtlImageRvaToVa( nt, base, addr, section );
 865 }
 866
 867 /***********************************************************************
 868  *         ImageDirectoryEntryToData   (DBGHELP.@)
 869  *
 870  * NOTES
 871  *   See ImageDirectoryEntryToDataEx
 872  */
 873 PVOID WINAPI ImageDirectoryEntryToData( PVOID base, BOOLEAN image, USHORT dir, PULONG size )
 874 {
 875     return ImageDirectoryEntryToDataEx( base, image, dir, size, NULL );
 876 }