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 <stdlib.h>
  25 #include <stdio.h>
  26 #include <string.h>
  27 #include <assert.h>
  28
  29 #include "dbghelp_private.h"
  30 #include "image_private.h"
  31 #include "winternl.h"
  32 #include "wine/debug.h"
  33 #include "wine/heap.h"
  34
  35 WINE_DEFAULT_DEBUG_CHANNEL(dbghelp);
  36
  37 struct pe_module_info
  38 {
  39     struct image_file_map       fmap;
  40 };
  41
  42 static const char builtin_signature[] = "Wine builtin DLL";
  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 NULL;
  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 static 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 static 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 (!stricmp(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 static 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 static 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 static 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_unmap_file
 184  *
 185  * Unmaps an PE file from memory (previously mapped with pe_map_file)
 186  */
 187 static void pe_unmap_file(struct image_file_map* fmap)
 188 {
 189     if (fmap->u.pe.hMap != 0)
 190     {
 191         struct image_section_map  ism;
 192         ism.fmap = fmap;
 193         for (ism.sidx = 0; ism.sidx < fmap->u.pe.ntheader.FileHeader.NumberOfSections; ism.sidx++)
 194         {
 195             pe_unmap_section(&ism);
 196         }
 197         while (fmap->u.pe.full_count) pe_unmap_full(fmap);
 198         HeapFree(GetProcessHeap(), 0, fmap->u.pe.sect);
 199         HeapFree(GetProcessHeap(), 0, (void*)fmap->u.pe.strtable); /* FIXME ugly (see pe_map_file) */
 200         CloseHandle(fmap->u.pe.hMap);
 201         fmap->u.pe.hMap = NULL;
 202     }
 203 }
 204
 205 static const struct image_file_map_ops pe_file_map_ops =
 206 {
 207     pe_map_section,
 208     pe_unmap_section,
 209     pe_find_section,
 210     pe_get_map_rva,
 211     pe_get_map_size,
 212     pe_unmap_file,
 213 };
 214
 215 /******************************************************************
 216  *              pe_is_valid_pointer_table
 217  *
 218  * Checks whether the PointerToSymbolTable and NumberOfSymbols in file_header contain
 219  * valid information.
 220  */
 221 static BOOL pe_is_valid_pointer_table(const IMAGE_NT_HEADERS* nthdr, const void* mapping, DWORD64 sz)
 222 {
 223     DWORD64     offset;
 224
 225     /* is the iSym table inside file size ? (including first DWORD of string table, which is its size) */
 226     offset = (DWORD64)nthdr->FileHeader.PointerToSymbolTable;
 227     offset += (DWORD64)nthdr->FileHeader.NumberOfSymbols * sizeof(IMAGE_SYMBOL);
 228     if (offset + sizeof(DWORD) > sz) return FALSE;
 229     /* is string table (following iSym table) inside file size ? */
 230     offset += *(DWORD*)((const char*)mapping + offset);
 231     return offset <= sz;
 232 }
 233
 234 /******************************************************************
 235  *              pe_map_file
 236  *
 237  * Maps an PE file into memory (and checks it's a real PE file)
 238  */
 239 BOOL pe_map_file(HANDLE file, struct image_file_map* fmap, enum module_type mt)
 240 {
 241     void*       mapping;
 242
 243     fmap->modtype = mt;
 244     fmap->ops = &pe_file_map_ops;
 245     fmap->alternate = NULL;
 246     fmap->u.pe.hMap = CreateFileMappingW(file, NULL, PAGE_READONLY, 0, 0, NULL);
 247     if (fmap->u.pe.hMap == 0) return FALSE;
 248     fmap->u.pe.full_count = 0;
 249     fmap->u.pe.full_map = NULL;
 250     if (!(mapping = pe_map_full(fmap, NULL))) goto error;
 251
 252     switch (mt)
 253     {
 254     case DMT_PE:
 255         {
 256             IMAGE_NT_HEADERS*       nthdr;
 257             IMAGE_SECTION_HEADER*   section;
 258             unsigned                i;
 259
 260             if (!(nthdr = RtlImageNtHeader(mapping))) goto error;
 261             memcpy(&fmap->u.pe.ntheader, nthdr, sizeof(fmap->u.pe.ntheader));
 262             switch (nthdr->OptionalHeader.Magic)
 263             {
 264             case 0x10b: fmap->addr_size = 32; break;
 265             case 0x20b: fmap->addr_size = 64; break;
 266             default: return FALSE;
 267             }
 268
 269             fmap->u.pe.builtin = !memcmp((const IMAGE_DOS_HEADER*)mapping + 1, builtin_signature, sizeof(builtin_signature));
 270             section = (IMAGE_SECTION_HEADER*)
 271                 ((char*)&nthdr->OptionalHeader + nthdr->FileHeader.SizeOfOptionalHeader);
 272             fmap->u.pe.sect = HeapAlloc(GetProcessHeap(), 0,
 273                                         nthdr->FileHeader.NumberOfSections * sizeof(fmap->u.pe.sect[0]));
 274             if (!fmap->u.pe.sect) goto error;
 275             for (i = 0; i < nthdr->FileHeader.NumberOfSections; i++)
 276             {
 277                 memcpy(&fmap->u.pe.sect[i].shdr, section + i, sizeof(IMAGE_SECTION_HEADER));
 278                 fmap->u.pe.sect[i].mapped = IMAGE_NO_MAP;
 279             }
 280             if (nthdr->FileHeader.PointerToSymbolTable && nthdr->FileHeader.NumberOfSymbols)
 281             {
 282                 LARGE_INTEGER li;
 283
 284                 if (GetFileSizeEx(file, &li) && pe_is_valid_pointer_table(nthdr, mapping, li.QuadPart))
 285                 {
 286                     /* FIXME ugly: should rather map the relevant content instead of copying it */
 287                     const char* src = (const char*)mapping +
 288                         nthdr->FileHeader.PointerToSymbolTable +
 289                         nthdr->FileHeader.NumberOfSymbols * sizeof(IMAGE_SYMBOL);
 290                     char* dst;
 291                     DWORD sz = *(DWORD*)src;
 292
 293                     if ((dst = HeapAlloc(GetProcessHeap(), 0, sz)))
 294                         memcpy(dst, src, sz);
 295                     fmap->u.pe.strtable = dst;
 296                 }
 297                 else
 298                 {
 299                     WARN("Bad coff table... wipping out\n");
 300                     /* we have bad information here, wipe it out */
 301                     fmap->u.pe.ntheader.FileHeader.PointerToSymbolTable = 0;
 302                     fmap->u.pe.ntheader.FileHeader.NumberOfSymbols = 0;
 303                     fmap->u.pe.strtable = NULL;
 304                 }
 305             }
 306             else fmap->u.pe.strtable = NULL;
 307         }
 308         break;
 309     default: assert(0); goto error;
 310     }
 311     pe_unmap_full(fmap);
 312
 313     return TRUE;
 314 error:
 315     pe_unmap_full(fmap);
 316     CloseHandle(fmap->u.pe.hMap);
 317     return FALSE;
 318 }
 319
 320 /******************************************************************
 321  *              pe_map_directory
 322  *
 323  * Maps a directory content out of a PE file
 324  */
 325 const char* pe_map_directory(struct module* module, int dirno, DWORD* size)
 326 {
 327     IMAGE_NT_HEADERS*   nth;
 328     void*               mapping;
 329
 330     if (module->type != DMT_PE || !module->format_info[DFI_PE]) return NULL;
 331     if (dirno >= IMAGE_NUMBEROF_DIRECTORY_ENTRIES ||
 332         !(mapping = pe_map_full(&module->format_info[DFI_PE]->u.pe_info->fmap, &nth)))
 333         return NULL;
 334     if (size) *size = nth->OptionalHeader.DataDirectory[dirno].Size;
 335     return RtlImageRvaToVa(nth, mapping,
 336                            nth->OptionalHeader.DataDirectory[dirno].VirtualAddress, NULL);
 337 }
 338
 339 static void pe_module_remove(struct process* pcs, struct module_format* modfmt)
 340 {
 341     image_unmap_file(&modfmt->u.pe_info->fmap);
 342     HeapFree(GetProcessHeap(), 0, modfmt);
 343 }
 344
 345 /******************************************************************
 346  *              pe_locate_with_coff_symbol_table
 347  *
 348  * Use the COFF symbol table (if any) from the IMAGE_FILE_HEADER to set the absolute address
 349  * of global symbols.
 350  * Mingw32 requires this for stabs debug information as address for global variables isn't filled in
 351  * (this is similar to what is done in elf_module.c when using the .symtab ELF section)
 352  */
 353 static BOOL pe_locate_with_coff_symbol_table(struct module* module)
 354 {
 355     struct image_file_map* fmap = &module->format_info[DFI_PE]->u.pe_info->fmap;
 356     const IMAGE_SYMBOL* isym;
 357     int                 i, numsym, naux;
 358     char                tmp[9];
 359     const char*         name;
 360     struct hash_table_iter      hti;
 361     void*               ptr;
 362     struct symt_data*   sym;
 363     const char*         mapping;
 364
 365     numsym = fmap->u.pe.ntheader.FileHeader.NumberOfSymbols;
 366     if (!fmap->u.pe.ntheader.FileHeader.PointerToSymbolTable || !numsym)
 367         return TRUE;
 368     if (!(mapping = pe_map_full(fmap, NULL))) return FALSE;
 369     isym = (const IMAGE_SYMBOL*)(mapping + fmap->u.pe.ntheader.FileHeader.PointerToSymbolTable);
 370
 371     for (i = 0; i < numsym; i+= naux, isym += naux)
 372     {
 373         if (isym->StorageClass == IMAGE_SYM_CLASS_EXTERNAL &&
 374             isym->SectionNumber > 0 && isym->SectionNumber <= fmap->u.pe.ntheader.FileHeader.NumberOfSections)
 375         {
 376             if (isym->N.Name.Short)
 377             {
 378                 name = memcpy(tmp, isym->N.ShortName, 8);
 379                 tmp[8] = '\0';
 380             }
 381             else name = fmap->u.pe.strtable + isym->N.Name.Long;
 382             if (name[0] == '_') name++;
 383             hash_table_iter_init(&module->ht_symbols, &hti, name);
 384             while ((ptr = hash_table_iter_up(&hti)))
 385             {
 386                 sym = CONTAINING_RECORD(ptr, struct symt_data, hash_elt);
 387                 if (sym->symt.tag == SymTagData &&
 388                     (sym->kind == DataIsGlobal || sym->kind == DataIsFileStatic) &&
 389                     sym->u.var.kind == loc_absolute &&
 390                     !strcmp(sym->hash_elt.name, name))
 391                 {
 392                     TRACE("Changing absolute address for %d.%s: %lx -> %s\n",
 393                           isym->SectionNumber, name, sym->u.var.offset,
 394                           wine_dbgstr_longlong(module->module.BaseOfImage +
 395                                                fmap->u.pe.sect[isym->SectionNumber - 1].shdr.VirtualAddress +
 396                                                isym->Value));
 397                     sym->u.var.offset = module->module.BaseOfImage +
 398                         fmap->u.pe.sect[isym->SectionNumber - 1].shdr.VirtualAddress + isym->Value;
 399                     break;
 400                 }
 401             }
 402         }
 403         naux = isym->NumberOfAuxSymbols + 1;
 404     }
 405     pe_unmap_full(fmap);
 406     return TRUE;
 407 }
 408
 409 /******************************************************************
 410  *              pe_load_coff_symbol_table
 411  *
 412  * Load public symbols out of the COFF symbol table (if any).
 413  */
 414 static BOOL pe_load_coff_symbol_table(struct module* module)
 415 {
 416     struct image_file_map* fmap = &module->format_info[DFI_PE]->u.pe_info->fmap;
 417     const IMAGE_SYMBOL* isym;
 418     int                 i, numsym, naux;
 419     const char*         strtable;
 420     char                tmp[9];
 421     const char*         name;
 422     const char*         lastfilename = NULL;
 423     struct symt_compiland*   compiland = NULL;
 424     const IMAGE_SECTION_HEADER* sect;
 425     const char*         mapping;
 426
 427     numsym = fmap->u.pe.ntheader.FileHeader.NumberOfSymbols;
 428     if (!fmap->u.pe.ntheader.FileHeader.PointerToSymbolTable || !numsym)
 429         return TRUE;
 430     if (!(mapping = pe_map_full(fmap, NULL))) return FALSE;
 431     isym = (const IMAGE_SYMBOL*)((const char*)mapping + fmap->u.pe.ntheader.FileHeader.PointerToSymbolTable);
 432     /* FIXME: no way to get strtable size */
 433     strtable = (const char*)&isym[numsym];
 434     sect = IMAGE_FIRST_SECTION(RtlImageNtHeader((HMODULE)mapping));
 435
 436     for (i = 0; i < numsym; i+= naux, isym += naux)
 437     {
 438         if (isym->StorageClass == IMAGE_SYM_CLASS_FILE)
 439         {
 440             lastfilename = (const char*)(isym + 1);
 441             compiland = NULL;
 442         }
 443         if (isym->StorageClass == IMAGE_SYM_CLASS_EXTERNAL &&
 444             isym->SectionNumber > 0 && isym->SectionNumber <= fmap->u.pe.ntheader.FileHeader.NumberOfSections)
 445         {
 446             if (isym->N.Name.Short)
 447             {
 448                 name = memcpy(tmp, isym->N.ShortName, 8);
 449                 tmp[8] = '\0';
 450             }
 451             else name = strtable + isym->N.Name.Long;
 452             if (name[0] == '_') name++;
 453
 454             if (!compiland && lastfilename)
 455                 compiland = symt_new_compiland(module, 0,
 456                                                source_new(module, NULL, lastfilename));
 457
 458             if (!(dbghelp_options & SYMOPT_NO_PUBLICS))
 459                 symt_new_public(module, compiland, name, FALSE,
 460                                 module->module.BaseOfImage + sect[isym->SectionNumber - 1].VirtualAddress +
 461                                      isym->Value,
 462                                 1);
 463         }
 464         naux = isym->NumberOfAuxSymbols + 1;
 465     }
 466     module->module.SymType = SymCoff;
 467     module->module.LineNumbers = FALSE;
 468     module->module.GlobalSymbols = FALSE;
 469     module->module.TypeInfo = FALSE;
 470     module->module.SourceIndexed = FALSE;
 471     module->module.Publics = TRUE;
 472     pe_unmap_full(fmap);
 473
 474     return TRUE;
 475 }
 476
 477 /******************************************************************
 478  *              pe_load_stabs
 479  *
 480  * look for stabs information in PE header (it's how the mingw compiler provides
 481  * its debugging information)
 482  */
 483 static BOOL pe_load_stabs(const struct process* pcs, struct module* module)
 484 {
 485     struct image_file_map*      fmap = &module->format_info[DFI_PE]->u.pe_info->fmap;
 486     struct image_section_map    sect_stabs, sect_stabstr;
 487     BOOL                        ret = FALSE;
 488
 489     if (pe_find_section(fmap, ".stab", &sect_stabs) && pe_find_section(fmap, ".stabstr", &sect_stabstr))
 490     {
 491         const char* stab;
 492         const char* stabstr;
 493
 494         stab = image_map_section(&sect_stabs);
 495         stabstr = image_map_section(&sect_stabstr);
 496         if (stab != IMAGE_NO_MAP && stabstr != IMAGE_NO_MAP)
 497         {
 498             ret = stabs_parse(module,
 499                               module->module.BaseOfImage - fmap->u.pe.ntheader.OptionalHeader.ImageBase,
 500                               stab, image_get_map_size(&sect_stabs) / sizeof(struct stab_nlist), sizeof(struct stab_nlist),
 501                               stabstr, image_get_map_size(&sect_stabstr),
 502                               NULL, NULL);
 503         }
 504         image_unmap_section(&sect_stabs);
 505         image_unmap_section(&sect_stabstr);
 506         if (ret) pe_locate_with_coff_symbol_table(module);
 507     }
 508     TRACE("%s the STABS debug info\n", ret ? "successfully loaded" : "failed to load");
 509
 510     return ret;
 511 }
 512
 513 /******************************************************************
 514  *              pe_load_dwarf
 515  *
 516  * look for dwarf information in PE header (it's also a way for the mingw compiler
 517  * to provide its debugging information)
 518  */
 519 static BOOL pe_load_dwarf(struct module* module)
 520 {
 521     struct image_file_map*      fmap = &module->format_info[DFI_PE]->u.pe_info->fmap;
 522     BOOL                        ret;
 523
 524     ret = dwarf2_parse(module,
 525                        module->module.BaseOfImage - fmap->u.pe.ntheader.OptionalHeader.ImageBase,
 526                        NULL, /* FIXME: some thunks to deal with ? */
 527                        fmap);
 528     TRACE("%s the DWARF debug info\n", ret ? "successfully loaded" : "failed to load");
 529
 530     return ret;
 531 }
 532
 533 /******************************************************************
 534  *              pe_load_dbg_file
 535  *
 536  * loads a .dbg file
 537  */
 538 static BOOL pe_load_dbg_file(const struct process* pcs, struct module* module,
 539                              const char* dbg_name, DWORD timestamp)
 540 {
 541     WCHAR tmp[MAX_PATH];
 542     HANDLE                              hFile = INVALID_HANDLE_VALUE, hMap = 0;
 543     const BYTE*                         dbg_mapping = NULL;
 544     BOOL                                ret = FALSE;
 545
 546     TRACE("Processing DBG file %s\n", debugstr_a(dbg_name));
 547
 548     if (path_find_symbol_file(pcs, module, dbg_name, DMT_DBG, NULL, timestamp, 0, tmp, &module->module.DbgUnmatched) &&
 549         (hFile = CreateFileW(tmp, GENERIC_READ, FILE_SHARE_READ, NULL,
 550                              OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL)) != INVALID_HANDLE_VALUE &&
 551         ((hMap = CreateFileMappingW(hFile, NULL, PAGE_READONLY, 0, 0, NULL)) != 0) &&
 552         ((dbg_mapping = MapViewOfFile(hMap, FILE_MAP_READ, 0, 0, 0)) != NULL))
 553     {
 554         const IMAGE_SEPARATE_DEBUG_HEADER*      hdr;
 555         const IMAGE_SECTION_HEADER*             sectp;
 556         const IMAGE_DEBUG_DIRECTORY*            dbg;
 557
 558         hdr = (const IMAGE_SEPARATE_DEBUG_HEADER*)dbg_mapping;
 559         /* section headers come immediately after debug header */
 560         sectp = (const IMAGE_SECTION_HEADER*)(hdr + 1);
 561         /* and after that and the exported names comes the debug directory */
 562         dbg = (const IMAGE_DEBUG_DIRECTORY*)
 563             (dbg_mapping + sizeof(*hdr) +
 564              hdr->NumberOfSections * sizeof(IMAGE_SECTION_HEADER) +
 565              hdr->ExportedNamesSize);
 566
 567         ret = pe_load_debug_directory(pcs, module, dbg_mapping, sectp,
 568                                       hdr->NumberOfSections, dbg,
 569                                       hdr->DebugDirectorySize / sizeof(*dbg));
 570     }
 571     else
 572         ERR("Couldn't find .DBG file %s (%s)\n", debugstr_a(dbg_name), debugstr_w(tmp));
 573
 574     if (dbg_mapping) UnmapViewOfFile(dbg_mapping);
 575     if (hMap) CloseHandle(hMap);
 576     if (hFile != INVALID_HANDLE_VALUE) CloseHandle(hFile);
 577     return ret;
 578 }
 579
 580 /******************************************************************
 581  *              pe_load_msc_debug_info
 582  *
 583  * Process MSC debug information in PE file.
 584  */
 585 static BOOL pe_load_msc_debug_info(const struct process* pcs, struct module* module)
 586 {
 587     struct image_file_map*      fmap = &module->format_info[DFI_PE]->u.pe_info->fmap;
 588     BOOL                        ret = FALSE;
 589     const IMAGE_DEBUG_DIRECTORY*dbg;
 590     ULONG                       nDbg;
 591     void*                       mapping;
 592     IMAGE_NT_HEADERS*           nth;
 593
 594     if (!(mapping = pe_map_full(fmap, &nth))) return FALSE;
 595     /* Read in debug directory */
 596     dbg = RtlImageDirectoryEntryToData( mapping, FALSE, IMAGE_DIRECTORY_ENTRY_DEBUG, &nDbg );
 597     if (!dbg || !(nDbg /= sizeof(IMAGE_DEBUG_DIRECTORY))) goto done;
 598
 599     /* Parse debug directory */
 600     if (nth->FileHeader.Characteristics & IMAGE_FILE_DEBUG_STRIPPED)
 601     {
 602         /* Debug info is stripped to .DBG file */
 603         const IMAGE_DEBUG_MISC* misc = (const IMAGE_DEBUG_MISC*)
 604             ((const char*)mapping + dbg->PointerToRawData);
 605
 606         if (nDbg != 1 || dbg->Type != IMAGE_DEBUG_TYPE_MISC ||
 607             misc->DataType != IMAGE_DEBUG_MISC_EXENAME)
 608         {
 609             ERR("-Debug info stripped, but no .DBG file in module %s\n",
 610                 debugstr_w(module->module.ModuleName));
 611         }
 612         else
 613         {
 614             ret = pe_load_dbg_file(pcs, module, (const char*)misc->Data, nth->FileHeader.TimeDateStamp);
 615         }
 616     }
 617     else
 618     {
 619         const IMAGE_SECTION_HEADER *sectp = (const IMAGE_SECTION_HEADER*)((const char*)&nth->OptionalHeader + nth->FileHeader.SizeOfOptionalHeader);
 620         /* Debug info is embedded into PE module */
 621         ret = pe_load_debug_directory(pcs, module, mapping, sectp,
 622                                       nth->FileHeader.NumberOfSections, dbg, nDbg);
 623     }
 624 done:
 625     pe_unmap_full(fmap);
 626     return ret;
 627 }
 628
 629 /***********************************************************************
 630  *                      pe_load_export_debug_info
 631  */
 632 static BOOL pe_load_export_debug_info(const struct process* pcs, struct module* module)
 633 {
 634     struct image_file_map*              fmap = &module->format_info[DFI_PE]->u.pe_info->fmap;
 635     unsigned int                        i;
 636     const IMAGE_EXPORT_DIRECTORY*       exports;
 637     DWORD                               base = module->module.BaseOfImage;
 638     DWORD                               size;
 639     IMAGE_NT_HEADERS*                   nth;
 640     void*                               mapping;
 641
 642     if (dbghelp_options & SYMOPT_NO_PUBLICS) return TRUE;
 643
 644     if (!(mapping = pe_map_full(fmap, &nth))) return FALSE;
 645 #if 0
 646     /* Add start of DLL (better use the (yet unimplemented) Exe SymTag for this) */
 647     /* FIXME: module.ModuleName isn't correctly set yet if it's passed in SymLoadModule */
 648     symt_new_public(module, NULL, module->module.ModuleName, FALSE, base, 1);
 649 #endif
 650
 651     /* Add entry point */
 652     symt_new_public(module, NULL, "EntryPoint", FALSE,
 653                     base + nth->OptionalHeader.AddressOfEntryPoint, 1);
 654 #if 0
 655     /* FIXME: we'd better store addresses linked to sections rather than
 656        absolute values */
 657     IMAGE_SECTION_HEADER*       section;
 658     /* Add start of sections */
 659     section = (IMAGE_SECTION_HEADER*)
 660         ((char*)&nth->OptionalHeader + nth->FileHeader.SizeOfOptionalHeader);
 661     for (i = 0; i < nth->FileHeader.NumberOfSections; i++, section++)
 662     {
 663         symt_new_public(module, NULL, section->Name, FALSE,
 664                         RtlImageRvaToVa(nth, mapping, section->VirtualAddress, NULL), 1);
 665     }
 666 #endif
 667
 668     /* Add exported functions */
 669     if ((exports = RtlImageDirectoryEntryToData(mapping, FALSE,
 670                                                 IMAGE_DIRECTORY_ENTRY_EXPORT, &size)))
 671     {
 672         const WORD*             ordinals = NULL;
 673         const DWORD_PTR*        functions = NULL;
 674         const DWORD*            names = NULL;
 675         unsigned int            j;
 676         char                    buffer[16];
 677
 678         functions = RtlImageRvaToVa(nth, mapping, exports->AddressOfFunctions, NULL);
 679         ordinals  = RtlImageRvaToVa(nth, mapping, exports->AddressOfNameOrdinals, NULL);
 680         names     = RtlImageRvaToVa(nth, mapping, exports->AddressOfNames, NULL);
 681
 682         if (functions && ordinals && names)
 683         {
 684             for (i = 0; i < exports->NumberOfNames; i++)
 685             {
 686                 if (!names[i]) continue;
 687                 symt_new_public(module, NULL,
 688                                 RtlImageRvaToVa(nth, mapping, names[i], NULL),
 689                                 FALSE,
 690                                 base + functions[ordinals[i]], 1);
 691             }
 692
 693             for (i = 0; i < exports->NumberOfFunctions; i++)
 694             {
 695                 if (!functions[i]) continue;
 696                 /* Check if we already added it with a name */
 697                 for (j = 0; j < exports->NumberOfNames; j++)
 698                     if ((ordinals[j] == i) && names[j]) break;
 699                 if (j < exports->NumberOfNames) continue;
 700                 snprintf(buffer, sizeof(buffer), "%d", i + exports->Base);
 701                 symt_new_public(module, NULL, buffer, FALSE, base + (DWORD)functions[i], 1);
 702             }
 703         }
 704     }
 705     /* no real debug info, only entry points */
 706     if (module->module.SymType == SymDeferred)
 707         module->module.SymType = SymExport;
 708     pe_unmap_full(fmap);
 709
 710     return TRUE;
 711 }
 712
 713 /******************************************************************
 714  *              pe_load_debug_info
 715  *
 716  */
 717 BOOL pe_load_debug_info(const struct process* pcs, struct module* module)
 718 {
 719     BOOL                ret = FALSE;
 720
 721     if (!(dbghelp_options & SYMOPT_PUBLICS_ONLY))
 722     {
 723         ret = image_check_alternate(&module->format_info[DFI_PE]->u.pe_info->fmap, module);
 724         ret = pe_load_stabs(pcs, module) || ret;
 725         ret = pe_load_dwarf(module) || ret;
 726         ret = pe_load_msc_debug_info(pcs, module) || ret;
 727         ret = ret || pe_load_coff_symbol_table(module); /* FIXME */
 728         /* if we still have no debug info (we could only get SymExport at this
 729          * point), then do the SymExport except if we have an ELF container,
 730          * in which case we'll rely on the export's on the ELF side
 731          */
 732     }
 733     /* FIXME shouldn't we check that? if (!module_get_debug(pcs, module)) */
 734     if (pe_load_export_debug_info(pcs, module) && !ret)
 735         ret = TRUE;
 736
 737     return ret;
 738 }
 739
 740 struct builtin_search
 741 {
 742     WCHAR *path;
 743     struct image_file_map fmap;
 744 };
 745
 746 static BOOL search_builtin_pe(void *param, HANDLE handle, const WCHAR *path)
 747 {
 748     struct builtin_search *search = param;
 749     size_t size;
 750
 751     if (!pe_map_file(handle, &search->fmap, DMT_PE)) return FALSE;
 752
 753     size = (lstrlenW(path) + 1) * sizeof(WCHAR);
 754     if ((search->path = heap_alloc(size)))
 755         memcpy(search->path, path, size);
 756     return TRUE;
 757 }
 758
 759 /******************************************************************
 760  *              pe_load_native_module
 761  *
 762  */
 763 struct module* pe_load_native_module(struct process* pcs, const WCHAR* name,
 764                                      HANDLE hFile, DWORD64 base, DWORD size)
 765 {
 766     struct module*              module = NULL;
 767     BOOL                        opened = FALSE;
 768     struct module_format*       modfmt;
 769     WCHAR                       loaded_name[MAX_PATH];
 770
 771     loaded_name[0] = '\0';
 772     if (!hFile)
 773     {
 774         assert(name);
 775
 776         if ((hFile = FindExecutableImageExW(name, pcs->search_path, loaded_name, NULL, NULL)) == NULL)
 777             return NULL;
 778         opened = TRUE;
 779     }
 780     else if (name) lstrcpyW(loaded_name, name);
 781     else if (dbghelp_options & SYMOPT_DEFERRED_LOADS)
 782         FIXME("Trouble ahead (no module name passed in deferred mode)\n");
 783     if (!(modfmt = HeapAlloc(GetProcessHeap(), 0, sizeof(struct module_format) + sizeof(struct pe_module_info))))
 784         return NULL;
 785     modfmt->u.pe_info = (struct pe_module_info*)(modfmt + 1);
 786     if (pe_map_file(hFile, &modfmt->u.pe_info->fmap, DMT_PE))
 787     {
 788         struct builtin_search builtin = { NULL };
 789         if (modfmt->u.pe_info->fmap.u.pe.builtin && search_dll_path(pcs, loaded_name, search_builtin_pe, &builtin))
 790         {
 791             TRACE("reloaded %s from %s\n", debugstr_w(loaded_name), debugstr_w(builtin.path));
 792             image_unmap_file(&modfmt->u.pe_info->fmap);
 793             modfmt->u.pe_info->fmap = builtin.fmap;
 794         }
 795         if (!base) base = modfmt->u.pe_info->fmap.u.pe.ntheader.OptionalHeader.ImageBase;
 796         if (!size) size = modfmt->u.pe_info->fmap.u.pe.ntheader.OptionalHeader.SizeOfImage;
 797
 798         module = module_new(pcs, loaded_name, DMT_PE, FALSE, base, size,
 799                             modfmt->u.pe_info->fmap.u.pe.ntheader.FileHeader.TimeDateStamp,
 800                             modfmt->u.pe_info->fmap.u.pe.ntheader.OptionalHeader.CheckSum);
 801         if (module)
 802         {
 803             module->real_path = builtin.path;
 804             modfmt->module = module;
 805             modfmt->remove = pe_module_remove;
 806             modfmt->loc_compute = NULL;
 807
 808             module->format_info[DFI_PE] = modfmt;
 809             if (dbghelp_options & SYMOPT_DEFERRED_LOADS)
 810                 module->module.SymType = SymDeferred;
 811             else
 812                 pe_load_debug_info(pcs, module);
 813             module->reloc_delta = base - modfmt->u.pe_info->fmap.u.pe.ntheader.OptionalHeader.ImageBase;
 814         }
 815         else
 816         {
 817             ERR("could not load the module '%s'\n", debugstr_w(loaded_name));
 818             heap_free(builtin.path);
 819             image_unmap_file(&modfmt->u.pe_info->fmap);
 820         }
 821     }
 822     if (!module) HeapFree(GetProcessHeap(), 0, modfmt);
 823
 824     if (opened) CloseHandle(hFile);
 825
 826     return module;
 827 }
 828
 829 /******************************************************************
 830  *              pe_load_nt_header
 831  *
 832  */
 833 BOOL pe_load_nt_header(HANDLE hProc, DWORD64 base, IMAGE_NT_HEADERS* nth)
 834 {
 835     IMAGE_DOS_HEADER    dos;
 836
 837     return ReadProcessMemory(hProc, (char*)(DWORD_PTR)base, &dos, sizeof(dos), NULL) &&
 838         dos.e_magic == IMAGE_DOS_SIGNATURE &&
 839         ReadProcessMemory(hProc, (char*)(DWORD_PTR)(base + dos.e_lfanew),
 840                           nth, sizeof(*nth), NULL) &&
 841         nth->Signature == IMAGE_NT_SIGNATURE;
 842 }
 843
 844 /******************************************************************
 845  *              pe_load_builtin_module
 846  *
 847  */
 848 struct module* pe_load_builtin_module(struct process* pcs, const WCHAR* name,
 849                                       DWORD64 base, DWORD64 size)
 850 {
 851     struct module*      module = NULL;
 852
 853     if (base && pcs->dbg_hdr_addr)
 854     {
 855         IMAGE_NT_HEADERS    nth;
 856
 857         if (pe_load_nt_header(pcs->handle, base, &nth))
 858         {
 859             if (!size) size = nth.OptionalHeader.SizeOfImage;
 860             module = module_new(pcs, name, DMT_PE, FALSE, base, size,
 861                                 nth.FileHeader.TimeDateStamp,
 862                                 nth.OptionalHeader.CheckSum);
 863         }
 864     }
 865     return module;
 866 }
 867
 868 /***********************************************************************
 869  *           ImageDirectoryEntryToDataEx (DBGHELP.@)
 870  *
 871  * Search for specified directory in PE image
 872  *
 873  * PARAMS
 874  *
 875  *   base    [in]  Image base address
 876  *   image   [in]  TRUE - image has been loaded by loader, FALSE - raw file image
 877  *   dir     [in]  Target directory index
 878  *   size    [out] Receives directory size
 879  *   section [out] Receives pointer to section header of section containing directory data
 880  *
 881  * RETURNS
 882  *   Success: pointer to directory data
 883  *   Failure: NULL
 884  *
 885  */
 886 PVOID WINAPI ImageDirectoryEntryToDataEx( PVOID base, BOOLEAN image, USHORT dir, PULONG size, PIMAGE_SECTION_HEADER *section )
 887 {
 888     const IMAGE_NT_HEADERS *nt;
 889     DWORD addr;
 890
 891     *size = 0;
 892     if (section) *section = NULL;
 893
 894     if (!(nt = RtlImageNtHeader( base ))) return NULL;
 895     if (nt->OptionalHeader.Magic == IMAGE_NT_OPTIONAL_HDR64_MAGIC)
 896     {
 897         const IMAGE_NT_HEADERS64 *nt64 = (const IMAGE_NT_HEADERS64 *)nt;
 898
 899         if (dir >= nt64->OptionalHeader.NumberOfRvaAndSizes) return NULL;
 900         if (!(addr = nt64->OptionalHeader.DataDirectory[dir].VirtualAddress)) return NULL;
 901         *size = nt64->OptionalHeader.DataDirectory[dir].Size;
 902         if (image || addr < nt64->OptionalHeader.SizeOfHeaders) return (char *)base + addr;
 903     }
 904     else if (nt->OptionalHeader.Magic == IMAGE_NT_OPTIONAL_HDR32_MAGIC)
 905     {
 906         const IMAGE_NT_HEADERS32 *nt32 = (const IMAGE_NT_HEADERS32 *)nt;
 907
 908         if (dir >= nt32->OptionalHeader.NumberOfRvaAndSizes) return NULL;
 909         if (!(addr = nt32->OptionalHeader.DataDirectory[dir].VirtualAddress)) return NULL;
 910         *size = nt32->OptionalHeader.DataDirectory[dir].Size;
 911         if (image || addr < nt32->OptionalHeader.SizeOfHeaders) return (char *)base + addr;
 912     }
 913     else return NULL;
 914
 915     return RtlImageRvaToVa( nt, base, addr, section );
 916 }
 917
 918 /***********************************************************************
 919  *         ImageDirectoryEntryToData   (DBGHELP.@)
 920  *
 921  * NOTES
 922  *   See ImageDirectoryEntryToDataEx
 923  */
 924 PVOID WINAPI ImageDirectoryEntryToData( PVOID base, BOOLEAN image, USHORT dir, PULONG size )
 925 {
 926     return ImageDirectoryEntryToDataEx( base, image, dir, size, NULL );
 927 }