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             section = (IMAGE_SECTION_HEADER*)
 228                 ((char*)&nthdr->OptionalHeader + nthdr->FileHeader.SizeOfOptionalHeader);
 229             fmap->u.pe.sect = HeapAlloc(GetProcessHeap(), 0,
 230                                         nthdr->FileHeader.NumberOfSections * sizeof(fmap->u.pe.sect[0]));
 231             if (!fmap->u.pe.sect) goto error;
 232             for (i = 0; i < nthdr->FileHeader.NumberOfSections; i++)
 233             {
 234                 memcpy(&fmap->u.pe.sect[i].shdr, section + i, sizeof(IMAGE_SECTION_HEADER));
 235                 fmap->u.pe.sect[i].mapped = IMAGE_NO_MAP;
 236             }
 237             if (nthdr->FileHeader.PointerToSymbolTable && nthdr->FileHeader.NumberOfSymbols)
 238             {
 239                 LARGE_INTEGER li;
 240
 241                 if (GetFileSizeEx(file, &li) && pe_is_valid_pointer_table(nthdr, mapping, li.QuadPart))
 242                 {
 243                     /* FIXME ugly: should rather map the relevant content instead of copying it */
 244                     const char* src = (const char*)mapping +
 245                         nthdr->FileHeader.PointerToSymbolTable +
 246                         nthdr->FileHeader.NumberOfSymbols * sizeof(IMAGE_SYMBOL);
 247                     char* dst;
 248                     DWORD sz = *(DWORD*)src;
 249
 250                     if ((dst = HeapAlloc(GetProcessHeap(), 0, sz)))
 251                         memcpy(dst, src, sz);
 252                     fmap->u.pe.strtable = dst;
 253                 }
 254                 else
 255                 {
 256                     WARN("Bad coff table... wipping out\n");
 257                     /* we have bad information here, wipe it out */
 258                     fmap->u.pe.ntheader.FileHeader.PointerToSymbolTable = 0;
 259                     fmap->u.pe.ntheader.FileHeader.NumberOfSymbols = 0;
 260                     fmap->u.pe.strtable = NULL;
 261                 }
 262             }
 263             else fmap->u.pe.strtable = NULL;
 264         }
 265         break;
 266     default: assert(0); goto error;
 267     }
 268     pe_unmap_full(fmap);
 269
 270     return TRUE;
 271 error:
 272     pe_unmap_full(fmap);
 273     CloseHandle(fmap->u.pe.hMap);
 274     return FALSE;
 275 }
 276
 277 /******************************************************************
 278  *              pe_unmap_file
 279  *
 280  * Unmaps an PE file from memory (previously mapped with pe_map_file)
 281  */
 282 static void pe_unmap_file(struct image_file_map* fmap)
 283 {
 284     if (fmap->u.pe.hMap != 0)
 285     {
 286         struct image_section_map  ism;
 287         ism.fmap = fmap;
 288         for (ism.sidx = 0; ism.sidx < fmap->u.pe.ntheader.FileHeader.NumberOfSections; ism.sidx++)
 289         {
 290             pe_unmap_section(&ism);
 291         }
 292         while (fmap->u.pe.full_count) pe_unmap_full(fmap);
 293         HeapFree(GetProcessHeap(), 0, fmap->u.pe.sect);
 294         HeapFree(GetProcessHeap(), 0, (void*)fmap->u.pe.strtable); /* FIXME ugly (see pe_map_file) */
 295         CloseHandle(fmap->u.pe.hMap);
 296         fmap->u.pe.hMap = NULL;
 297     }
 298 }
 299
 300 /******************************************************************
 301  *              pe_map_directory
 302  *
 303  * Maps a directory content out of a PE file
 304  */
 305 const char* pe_map_directory(struct module* module, int dirno, DWORD* size)
 306 {
 307     IMAGE_NT_HEADERS*   nth;
 308     void*               mapping;
 309
 310     if (module->type != DMT_PE || !module->format_info[DFI_PE]) return NULL;
 311     if (dirno >= IMAGE_NUMBEROF_DIRECTORY_ENTRIES ||
 312         !(mapping = pe_map_full(&module->format_info[DFI_PE]->u.pe_info->fmap, &nth)))
 313         return NULL;
 314     if (size) *size = nth->OptionalHeader.DataDirectory[dirno].Size;
 315     return RtlImageRvaToVa(nth, mapping,
 316                            nth->OptionalHeader.DataDirectory[dirno].VirtualAddress, NULL);
 317 }
 318
 319 /******************************************************************
 320  *              pe_unmap_directory
 321  *
 322  * Unmaps a directory content
 323  */
 324 void pe_unmap_directory(struct image_file_map* fmap, int dirno)
 325 {
 326     pe_unmap_full(fmap);
 327 }
 328
 329 static void pe_module_remove(struct process* pcs, struct module_format* modfmt)
 330 {
 331     pe_unmap_file(&modfmt->u.pe_info->fmap);
 332     HeapFree(GetProcessHeap(), 0, modfmt);
 333 }
 334
 335 /******************************************************************
 336  *              pe_locate_with_coff_symbol_table
 337  *
 338  * Use the COFF symbol table (if any) from the IMAGE_FILE_HEADER to set the absolute address
 339  * of global symbols.
 340  * Mingw32 requires this for stabs debug information as address for global variables isn't filled in
 341  * (this is similar to what is done in elf_module.c when using the .symtab ELF section)
 342  */
 343 static BOOL pe_locate_with_coff_symbol_table(struct module* module)
 344 {
 345     struct image_file_map* fmap = &module->format_info[DFI_PE]->u.pe_info->fmap;
 346     const IMAGE_SYMBOL* isym;
 347     int                 i, numsym, naux;
 348     char                tmp[9];
 349     const char*         name;
 350     struct hash_table_iter      hti;
 351     void*               ptr;
 352     struct symt_data*   sym;
 353     const char*         mapping;
 354
 355     numsym = fmap->u.pe.ntheader.FileHeader.NumberOfSymbols;
 356     if (!fmap->u.pe.ntheader.FileHeader.PointerToSymbolTable || !numsym)
 357         return TRUE;
 358     if (!(mapping = pe_map_full(fmap, NULL))) return FALSE;
 359     isym = (const IMAGE_SYMBOL*)(mapping + fmap->u.pe.ntheader.FileHeader.PointerToSymbolTable);
 360
 361     for (i = 0; i < numsym; i+= naux, isym += naux)
 362     {
 363         if (isym->StorageClass == IMAGE_SYM_CLASS_EXTERNAL &&
 364             isym->SectionNumber > 0 && isym->SectionNumber <= fmap->u.pe.ntheader.FileHeader.NumberOfSections)
 365         {
 366             if (isym->N.Name.Short)
 367             {
 368                 name = memcpy(tmp, isym->N.ShortName, 8);
 369                 tmp[8] = '\0';
 370             }
 371             else name = fmap->u.pe.strtable + isym->N.Name.Long;
 372             if (name[0] == '_') name++;
 373             hash_table_iter_init(&module->ht_symbols, &hti, name);
 374             while ((ptr = hash_table_iter_up(&hti)))
 375             {
 376                 sym = GET_ENTRY(ptr, struct symt_data, hash_elt);
 377                 if (sym->symt.tag == SymTagData &&
 378                     (sym->kind == DataIsGlobal || sym->kind == DataIsFileStatic) &&
 379                     sym->u.var.kind == loc_absolute &&
 380                     !strcmp(sym->hash_elt.name, name))
 381                 {
 382                     TRACE("Changing absolute address for %d.%s: %lx -> %s\n",
 383                           isym->SectionNumber, name, sym->u.var.offset,
 384                           wine_dbgstr_longlong(module->module.BaseOfImage +
 385                                                fmap->u.pe.sect[isym->SectionNumber - 1].shdr.VirtualAddress +
 386                                                isym->Value));
 387                     sym->u.var.offset = module->module.BaseOfImage +
 388                         fmap->u.pe.sect[isym->SectionNumber - 1].shdr.VirtualAddress + isym->Value;
 389                     break;
 390                 }
 391             }
 392         }
 393         naux = isym->NumberOfAuxSymbols + 1;
 394     }
 395     pe_unmap_full(fmap);
 396     return TRUE;
 397 }
 398
 399 /******************************************************************
 400  *              pe_load_coff_symbol_table
 401  *
 402  * Load public symbols out of the COFF symbol table (if any).
 403  */
 404 static BOOL pe_load_coff_symbol_table(struct module* module)
 405 {
 406     struct image_file_map* fmap = &module->format_info[DFI_PE]->u.pe_info->fmap;
 407     const IMAGE_SYMBOL* isym;
 408     int                 i, numsym, naux;
 409     const char*         strtable;
 410     char                tmp[9];
 411     const char*         name;
 412     const char*         lastfilename = NULL;
 413     struct symt_compiland*   compiland = NULL;
 414     const IMAGE_SECTION_HEADER* sect;
 415     const char*         mapping;
 416
 417     numsym = fmap->u.pe.ntheader.FileHeader.NumberOfSymbols;
 418     if (!fmap->u.pe.ntheader.FileHeader.PointerToSymbolTable || !numsym)
 419         return TRUE;
 420     if (!(mapping = pe_map_full(fmap, NULL))) return FALSE;
 421     isym = (const IMAGE_SYMBOL*)((const char*)mapping + fmap->u.pe.ntheader.FileHeader.PointerToSymbolTable);
 422     /* FIXME: no way to get strtable size */
 423     strtable = (const char*)&isym[numsym];
 424     sect = IMAGE_FIRST_SECTION(RtlImageNtHeader((HMODULE)mapping));
 425
 426     for (i = 0; i < numsym; i+= naux, isym += naux)
 427     {
 428         if (isym->StorageClass == IMAGE_SYM_CLASS_FILE)
 429         {
 430             lastfilename = (const char*)(isym + 1);
 431             compiland = NULL;
 432         }
 433         if (isym->StorageClass == IMAGE_SYM_CLASS_EXTERNAL &&
 434             isym->SectionNumber > 0 && isym->SectionNumber <= fmap->u.pe.ntheader.FileHeader.NumberOfSections)
 435         {
 436             if (isym->N.Name.Short)
 437             {
 438                 name = memcpy(tmp, isym->N.ShortName, 8);
 439                 tmp[8] = '\0';
 440             }
 441             else name = strtable + isym->N.Name.Long;
 442             if (name[0] == '_') name++;
 443
 444             if (!compiland && lastfilename)
 445                 compiland = symt_new_compiland(module, 0,
 446                                                source_new(module, NULL, lastfilename));
 447
 448             if (!(dbghelp_options & SYMOPT_NO_PUBLICS))
 449                 symt_new_public(module, compiland, name,
 450                                 module->module.BaseOfImage + sect[isym->SectionNumber - 1].VirtualAddress +
 451                                      isym->Value,
 452                                 1);
 453         }
 454         naux = isym->NumberOfAuxSymbols + 1;
 455     }
 456     module->module.SymType = SymCoff;
 457     module->module.LineNumbers = FALSE;
 458     module->module.GlobalSymbols = FALSE;
 459     module->module.TypeInfo = FALSE;
 460     module->module.SourceIndexed = FALSE;
 461     module->module.Publics = TRUE;
 462     pe_unmap_full(fmap);
 463
 464     return TRUE;
 465 }
 466
 467 /******************************************************************
 468  *              pe_load_stabs
 469  *
 470  * look for stabs information in PE header (it's how the mingw compiler provides
 471  * its debugging information)
 472  */
 473 static BOOL pe_load_stabs(const struct process* pcs, struct module* module)
 474 {
 475     struct image_file_map*      fmap = &module->format_info[DFI_PE]->u.pe_info->fmap;
 476     struct image_section_map    sect_stabs, sect_stabstr;
 477     BOOL                        ret = FALSE;
 478
 479     if (pe_find_section(fmap, ".stab", &sect_stabs) && pe_find_section(fmap, ".stabstr", &sect_stabstr))
 480     {
 481         const char* stab;
 482         const char* stabstr;
 483
 484         stab = image_map_section(&sect_stabs);
 485         stabstr = image_map_section(&sect_stabstr);
 486         if (stab != IMAGE_NO_MAP && stabstr != IMAGE_NO_MAP)
 487         {
 488             ret = stabs_parse(module,
 489                               module->module.BaseOfImage - fmap->u.pe.ntheader.OptionalHeader.ImageBase,
 490                               stab, image_get_map_size(&sect_stabs),
 491                               stabstr, image_get_map_size(&sect_stabstr),
 492                               NULL, NULL);
 493         }
 494         image_unmap_section(&sect_stabs);
 495         image_unmap_section(&sect_stabstr);
 496         if (ret) pe_locate_with_coff_symbol_table(module);
 497     }
 498     TRACE("%s the STABS debug info\n", ret ? "successfully loaded" : "failed to load");
 499
 500     return ret;
 501 }
 502
 503 /******************************************************************
 504  *              pe_load_dwarf
 505  *
 506  * look for dwarf information in PE header (it's also a way for the mingw compiler
 507  * to provide its debugging information)
 508  */
 509 static BOOL pe_load_dwarf(struct module* module)
 510 {
 511     struct image_file_map*      fmap = &module->format_info[DFI_PE]->u.pe_info->fmap;
 512     BOOL                        ret = FALSE;
 513
 514     ret = dwarf2_parse(module,
 515                        module->module.BaseOfImage - fmap->u.pe.ntheader.OptionalHeader.ImageBase,
 516                        NULL, /* FIXME: some thunks to deal with ? */
 517                        fmap);
 518     TRACE("%s the DWARF debug info\n", ret ? "successfully loaded" : "failed to load");
 519
 520     return ret;
 521 }
 522
 523 /******************************************************************
 524  *              pe_load_dbg_file
 525  *
 526  * loads a .dbg file
 527  */
 528 static BOOL pe_load_dbg_file(const struct process* pcs, struct module* module,
 529                              const char* dbg_name, DWORD timestamp)
 530 {
 531     char                                tmp[MAX_PATH];
 532     HANDLE                              hFile = INVALID_HANDLE_VALUE, hMap = 0;
 533     const BYTE*                         dbg_mapping = NULL;
 534     BOOL                                ret = FALSE;
 535
 536     TRACE("Processing DBG file %s\n", debugstr_a(dbg_name));
 537
 538     if (path_find_symbol_file(pcs, dbg_name, NULL, timestamp, 0, tmp, &module->module.DbgUnmatched) &&
 539         (hFile = CreateFileA(tmp, GENERIC_READ, FILE_SHARE_READ, NULL,
 540                              OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL)) != INVALID_HANDLE_VALUE &&
 541         ((hMap = CreateFileMappingW(hFile, NULL, PAGE_READONLY, 0, 0, NULL)) != 0) &&
 542         ((dbg_mapping = MapViewOfFile(hMap, FILE_MAP_READ, 0, 0, 0)) != NULL))
 543     {
 544         const IMAGE_SEPARATE_DEBUG_HEADER*      hdr;
 545         const IMAGE_SECTION_HEADER*             sectp;
 546         const IMAGE_DEBUG_DIRECTORY*            dbg;
 547
 548         hdr = (const IMAGE_SEPARATE_DEBUG_HEADER*)dbg_mapping;
 549         /* section headers come immediately after debug header */
 550         sectp = (const IMAGE_SECTION_HEADER*)(hdr + 1);
 551         /* and after that and the exported names comes the debug directory */
 552         dbg = (const IMAGE_DEBUG_DIRECTORY*)
 553             (dbg_mapping + sizeof(*hdr) +
 554              hdr->NumberOfSections * sizeof(IMAGE_SECTION_HEADER) +
 555              hdr->ExportedNamesSize);
 556
 557         ret = pe_load_debug_directory(pcs, module, dbg_mapping, sectp,
 558                                       hdr->NumberOfSections, dbg,
 559                                       hdr->DebugDirectorySize / sizeof(*dbg));
 560     }
 561     else
 562         ERR("Couldn't find .DBG file %s (%s)\n", debugstr_a(dbg_name), debugstr_a(tmp));
 563
 564     if (dbg_mapping) UnmapViewOfFile(dbg_mapping);
 565     if (hMap) CloseHandle(hMap);
 566     if (hFile != INVALID_HANDLE_VALUE) CloseHandle(hFile);
 567     return ret;
 568 }
 569
 570 /******************************************************************
 571  *              pe_load_msc_debug_info
 572  *
 573  * Process MSC debug information in PE file.
 574  */
 575 static BOOL pe_load_msc_debug_info(const struct process* pcs, struct module* module)
 576 {
 577     struct image_file_map*      fmap = &module->format_info[DFI_PE]->u.pe_info->fmap;
 578     BOOL                        ret = FALSE;
 579     const IMAGE_DATA_DIRECTORY* dir;
 580     const IMAGE_DEBUG_DIRECTORY*dbg = NULL;
 581     int                         nDbg;
 582     void*                       mapping;
 583     IMAGE_NT_HEADERS*           nth;
 584
 585     if (!(mapping = pe_map_full(fmap, &nth))) return FALSE;
 586     /* Read in debug directory */
 587     dir = nth->OptionalHeader.DataDirectory + IMAGE_DIRECTORY_ENTRY_DEBUG;
 588     nDbg = dir->Size / sizeof(IMAGE_DEBUG_DIRECTORY);
 589     if (!nDbg) goto done;
 590
 591     dbg = RtlImageRvaToVa(nth, mapping, dir->VirtualAddress, NULL);
 592
 593     /* Parse debug directory */
 594     if (nth->FileHeader.Characteristics & IMAGE_FILE_DEBUG_STRIPPED)
 595     {
 596         /* Debug info is stripped to .DBG file */
 597         const IMAGE_DEBUG_MISC* misc = (const IMAGE_DEBUG_MISC*)
 598             ((const char*)mapping + dbg->PointerToRawData);
 599
 600         if (nDbg != 1 || dbg->Type != IMAGE_DEBUG_TYPE_MISC ||
 601             misc->DataType != IMAGE_DEBUG_MISC_EXENAME)
 602         {
 603             ERR("-Debug info stripped, but no .DBG file in module %s\n",
 604                 debugstr_w(module->module.ModuleName));
 605         }
 606         else
 607         {
 608             ret = pe_load_dbg_file(pcs, module, (const char*)misc->Data, nth->FileHeader.TimeDateStamp);
 609         }
 610     }
 611     else
 612     {
 613         const IMAGE_SECTION_HEADER *sectp = (const IMAGE_SECTION_HEADER*)((const char*)&nth->OptionalHeader + nth->FileHeader.SizeOfOptionalHeader);
 614         /* Debug info is embedded into PE module */
 615         ret = pe_load_debug_directory(pcs, module, mapping, sectp,
 616                                       nth->FileHeader.NumberOfSections, dbg, nDbg);
 617     }
 618 done:
 619     pe_unmap_full(fmap);
 620     return ret;
 621 }
 622
 623 /***********************************************************************
 624  *                      pe_load_export_debug_info
 625  */
 626 static BOOL pe_load_export_debug_info(const struct process* pcs, struct module* module)
 627 {
 628     struct image_file_map*              fmap = &module->format_info[DFI_PE]->u.pe_info->fmap;
 629     unsigned int                        i;
 630     const IMAGE_EXPORT_DIRECTORY*       exports;
 631     DWORD                               base = module->module.BaseOfImage;
 632     DWORD                               size;
 633     IMAGE_NT_HEADERS*                   nth;
 634     void*                               mapping;
 635
 636     if (dbghelp_options & SYMOPT_NO_PUBLICS) return TRUE;
 637
 638     if (!(mapping = pe_map_full(fmap, &nth))) return FALSE;
 639 #if 0
 640     /* Add start of DLL (better use the (yet unimplemented) Exe SymTag for this) */
 641     /* FIXME: module.ModuleName isn't correctly set yet if it's passed in SymLoadModule */
 642     symt_new_public(module, NULL, module->module.ModuleName, base, 1);
 643 #endif
 644
 645     /* Add entry point */
 646     symt_new_public(module, NULL, "EntryPoint",
 647                     base + nth->OptionalHeader.AddressOfEntryPoint, 1);
 648 #if 0
 649     /* FIXME: we'd better store addresses linked to sections rather than
 650        absolute values */
 651     IMAGE_SECTION_HEADER*       section;
 652     /* Add start of sections */
 653     section = (IMAGE_SECTION_HEADER*)
 654         ((char*)&nth->OptionalHeader + nth->FileHeader.SizeOfOptionalHeader);
 655     for (i = 0; i < nth->FileHeader.NumberOfSections; i++, section++)
 656     {
 657         symt_new_public(module, NULL, section->Name,
 658                         RtlImageRvaToVa(nth, mapping, section->VirtualAddress, NULL), 1);
 659     }
 660 #endif
 661
 662     /* Add exported functions */
 663     if ((exports = RtlImageDirectoryEntryToData(mapping, FALSE,
 664                                                 IMAGE_DIRECTORY_ENTRY_EXPORT, &size)))
 665     {
 666         const WORD*             ordinals = NULL;
 667         const DWORD_PTR*        functions = NULL;
 668         const DWORD*            names = NULL;
 669         unsigned int            j;
 670         char                    buffer[16];
 671
 672         functions = RtlImageRvaToVa(nth, mapping, exports->AddressOfFunctions, NULL);
 673         ordinals  = RtlImageRvaToVa(nth, mapping, exports->AddressOfNameOrdinals, NULL);
 674         names     = RtlImageRvaToVa(nth, mapping, exports->AddressOfNames, NULL);
 675
 676         if (functions && ordinals && names)
 677         {
 678             for (i = 0; i < exports->NumberOfNames; i++)
 679             {
 680                 if (!names[i]) continue;
 681                 symt_new_public(module, NULL,
 682                                 RtlImageRvaToVa(nth, mapping, names[i], NULL),
 683                                 base + functions[ordinals[i]], 1);
 684             }
 685
 686             for (i = 0; i < exports->NumberOfFunctions; i++)
 687             {
 688                 if (!functions[i]) continue;
 689                 /* Check if we already added it with a name */
 690                 for (j = 0; j < exports->NumberOfNames; j++)
 691                     if ((ordinals[j] == i) && names[j]) break;
 692                 if (j < exports->NumberOfNames) continue;
 693                 snprintf(buffer, sizeof(buffer), "%d", i + exports->Base);
 694                 symt_new_public(module, NULL, buffer, base + (DWORD)functions[i], 1);
 695             }
 696         }
 697     }
 698     /* no real debug info, only entry points */
 699     if (module->module.SymType == SymDeferred)
 700         module->module.SymType = SymExport;
 701     pe_unmap_full(fmap);
 702
 703     return TRUE;
 704 }
 705
 706 /******************************************************************
 707  *              pe_load_debug_info
 708  *
 709  */
 710 BOOL pe_load_debug_info(const struct process* pcs, struct module* module)
 711 {
 712     BOOL                ret = FALSE;
 713
 714     if (!(dbghelp_options & SYMOPT_PUBLICS_ONLY))
 715     {
 716         ret = pe_load_stabs(pcs, module);
 717         ret = pe_load_dwarf(module) || ret;
 718         ret = pe_load_msc_debug_info(pcs, module) || ret;
 719         ret = ret || pe_load_coff_symbol_table(module); /* FIXME */
 720         /* if we still have no debug info (we could only get SymExport at this
 721          * point), then do the SymExport except if we have an ELF container,
 722          * in which case we'll rely on the export's on the ELF side
 723          */
 724     }
 725     /* FIXME shouldn't we check that? if (!module_get_debug(pcs, module)) */
 726     if (pe_load_export_debug_info(pcs, module) && !ret)
 727         ret = TRUE;
 728
 729     return ret;
 730 }
 731
 732 /******************************************************************
 733  *              pe_load_native_module
 734  *
 735  */
 736 struct module* pe_load_native_module(struct process* pcs, const WCHAR* name,
 737                                      HANDLE hFile, DWORD64 base, DWORD size)
 738 {
 739     struct module*              module = NULL;
 740     BOOL                        opened = FALSE;
 741     struct module_format*       modfmt;
 742     WCHAR                       loaded_name[MAX_PATH];
 743
 744     loaded_name[0] = '\0';
 745     if (!hFile)
 746     {
 747         assert(name);
 748
 749         if ((hFile = FindExecutableImageExW(name, pcs->search_path, loaded_name, NULL, NULL)) == NULL)
 750             return NULL;
 751         opened = TRUE;
 752     }
 753     else if (name) strcpyW(loaded_name, name);
 754     else if (dbghelp_options & SYMOPT_DEFERRED_LOADS)
 755         FIXME("Trouble ahead (no module name passed in deferred mode)\n");
 756     if (!(modfmt = HeapAlloc(GetProcessHeap(), 0, sizeof(struct module_format) + sizeof(struct pe_module_info))))
 757         return NULL;
 758     modfmt->u.pe_info = (struct pe_module_info*)(modfmt + 1);
 759     if (pe_map_file(hFile, &modfmt->u.pe_info->fmap, DMT_PE))
 760     {
 761         if (!base) base = modfmt->u.pe_info->fmap.u.pe.ntheader.OptionalHeader.ImageBase;
 762         if (!size) size = modfmt->u.pe_info->fmap.u.pe.ntheader.OptionalHeader.SizeOfImage;
 763
 764         module = module_new(pcs, loaded_name, DMT_PE, FALSE, base, size,
 765                             modfmt->u.pe_info->fmap.u.pe.ntheader.FileHeader.TimeDateStamp,
 766                             modfmt->u.pe_info->fmap.u.pe.ntheader.OptionalHeader.CheckSum);
 767         if (module)
 768         {
 769             modfmt->module = module;
 770             modfmt->remove = pe_module_remove;
 771             modfmt->loc_compute = NULL;
 772
 773             module->format_info[DFI_PE] = modfmt;
 774             if (dbghelp_options & SYMOPT_DEFERRED_LOADS)
 775                 module->module.SymType = SymDeferred;
 776             else
 777                 pe_load_debug_info(pcs, module);
 778             module->reloc_delta = base - modfmt->u.pe_info->fmap.u.pe.ntheader.OptionalHeader.ImageBase;
 779         }
 780         else
 781         {
 782             ERR("could not load the module '%s'\n", debugstr_w(loaded_name));
 783             pe_unmap_file(&modfmt->u.pe_info->fmap);
 784         }
 785     }
 786     if (!module) HeapFree(GetProcessHeap(), 0, modfmt);
 787
 788     if (opened) CloseHandle(hFile);
 789
 790     return module;
 791 }
 792
 793 /******************************************************************
 794  *              pe_load_nt_header
 795  *
 796  */
 797 BOOL pe_load_nt_header(HANDLE hProc, DWORD64 base, IMAGE_NT_HEADERS* nth)
 798 {
 799     IMAGE_DOS_HEADER    dos;
 800
 801     return ReadProcessMemory(hProc, (char*)(DWORD_PTR)base, &dos, sizeof(dos), NULL) &&
 802         dos.e_magic == IMAGE_DOS_SIGNATURE &&
 803         ReadProcessMemory(hProc, (char*)(DWORD_PTR)(base + dos.e_lfanew),
 804                           nth, sizeof(*nth), NULL) &&
 805         nth->Signature == IMAGE_NT_SIGNATURE;
 806 }
 807
 808 /******************************************************************
 809  *              pe_load_builtin_module
 810  *
 811  */
 812 struct module* pe_load_builtin_module(struct process* pcs, const WCHAR* name,
 813                                       DWORD64 base, DWORD64 size)
 814 {
 815     struct module*      module = NULL;
 816
 817     if (base && pcs->dbg_hdr_addr)
 818     {
 819         IMAGE_NT_HEADERS    nth;
 820
 821         if (pe_load_nt_header(pcs->handle, base, &nth))
 822         {
 823             if (!size) size = nth.OptionalHeader.SizeOfImage;
 824             module = module_new(pcs, name, DMT_PE, FALSE, base, size,
 825                                 nth.FileHeader.TimeDateStamp,
 826                                 nth.OptionalHeader.CheckSum);
 827         }
 828     }
 829     return module;
 830 }
 831
 832 /***********************************************************************
 833  *           ImageDirectoryEntryToDataEx (DBGHELP.@)
 834  *
 835  * Search for specified directory in PE image
 836  *
 837  * PARAMS
 838  *
 839  *   base    [in]  Image base address
 840  *   image   [in]  TRUE - image has been loaded by loader, FALSE - raw file image
 841  *   dir     [in]  Target directory index
 842  *   size    [out] Receives directory size
 843  *   section [out] Receives pointer to section header of section containing directory data
 844  *
 845  * RETURNS
 846  *   Success: pointer to directory data
 847  *   Failure: NULL
 848  *
 849  */
 850 PVOID WINAPI ImageDirectoryEntryToDataEx( PVOID base, BOOLEAN image, USHORT dir, PULONG size, PIMAGE_SECTION_HEADER *section )
 851 {
 852     const IMAGE_NT_HEADERS *nt;
 853     DWORD addr;
 854
 855     *size = 0;
 856     if (section) *section = NULL;
 857
 858     if (!(nt = RtlImageNtHeader( base ))) return NULL;
 859     if (dir >= nt->OptionalHeader.NumberOfRvaAndSizes) return NULL;
 860     if (!(addr = nt->OptionalHeader.DataDirectory[dir].VirtualAddress)) return NULL;
 861
 862     *size = nt->OptionalHeader.DataDirectory[dir].Size;
 863     if (image || addr < nt->OptionalHeader.SizeOfHeaders) return (char *)base + addr;
 864
 865     return RtlImageRvaToVa( nt, base, addr, section );
 866 }
 867
 868 /***********************************************************************
 869  *         ImageDirectoryEntryToData   (DBGHELP.@)
 870  *
 871  * NOTES
 872  *   See ImageDirectoryEntryToDataEx
 873  */
 874 PVOID WINAPI ImageDirectoryEntryToData( PVOID base, BOOLEAN image, USHORT dir, PULONG size )
 875 {
 876     return ImageDirectoryEntryToDataEx( base, image, dir, size, NULL );
 877 }