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