text: /*
   * File module.c - module handling for the wine debugger
   *
   * Copyright (C) 1993,      Eric Youngdale.
   * 		 2000-2007, Eric Pouech
   *
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
   */
  
  #include <stdlib.h>
  #include <stdio.h>
  #include <string.h>
  #include <assert.h>
  
  #include "dbghelp_private.h"
  #include "image_private.h"
  #include "psapi.h"
  #include "winternl.h"
  #include "wine/debug.h"
  #include "wine/heap.h"
  
  WINE_DEFAULT_DEBUG_CHANNEL(dbghelp);
  
  #define NOTE_GNU_BUILD_ID  3
  
  const WCHAR        S_ElfW[]         = {'<','e','l','f','>','\0'};
  const WCHAR        S_WineLoaderW[]  = {'<','w','i','n','e','-','l','o','a','d','e','r','>','\0'};
  static const WCHAR S_DotSoW[]       = {'.','s','o','\0'};
  const WCHAR        S_SlashW[]       = {'/','\0'};
  
  static const WCHAR S_AcmW[] = {'.','a','c','m','\0'};
  static const WCHAR S_DllW[] = {'.','d','l','l','\0'};
  static const WCHAR S_DrvW[] = {'.','d','r','v','\0'};
  static const WCHAR S_ExeW[] = {'.','e','x','e','\0'};
  static const WCHAR S_OcxW[] = {'.','o','c','x','\0'};
  static const WCHAR S_VxdW[] = {'.','v','x','d','\0'};
  static const WCHAR * const ext[] = {S_AcmW, S_DllW, S_DrvW, S_ExeW, S_OcxW, S_VxdW, NULL};
  
  static int match_ext(const WCHAR* ptr, size_t len)
  {
      const WCHAR* const *e;
      size_t      l;
  
      for (e = ext; *e; e++)
      {
          l = lstrlenW(*e);
          if (l >= len) return 0;
          if (wcsnicmp(&ptr[len - l], *e, l)) continue;
          return l;
      }
      return 0;
  }
  
  static const WCHAR* get_filename(const WCHAR* name, const WCHAR* endptr)
  {
      const WCHAR*        ptr;
  
      if (!endptr) endptr = name + lstrlenW(name);
      for (ptr = endptr - 1; ptr >= name; ptr--)
      {
          if (*ptr == '/' || *ptr == '\\') break;
      }
      return ++ptr;
  }
  
  static BOOL is_wine_loader(const WCHAR *module)
  {
      static const WCHAR wineW[] = {'w','i','n','e',0};
      static const WCHAR suffixW[] = {'6','4',0};
      const WCHAR *filename = get_filename(module, NULL);
      const char *ptr;
      BOOL ret = FALSE;
      WCHAR *buffer;
      DWORD len;
  
      if ((ptr = getenv("WINELOADER")))
      {
          ptr = file_nameA(ptr);
          len = 2 + MultiByteToWideChar( CP_UNIXCP, 0, ptr, -1, NULL, 0 );
          buffer = heap_alloc( len * sizeof(WCHAR) );
          MultiByteToWideChar( CP_UNIXCP, 0, ptr, -1, buffer, len );
      }
      else
      {
          buffer = heap_alloc( sizeof(wineW) + 2 * sizeof(WCHAR) );
          lstrcpyW( buffer, wineW );
      }
  
      if (!wcscmp( filename, buffer ))
          ret = TRUE;
  
      lstrcatW( buffer, suffixW );
      if (!wcscmp( filename, buffer ))
          ret = TRUE;
  
      heap_free( buffer );
      return ret;
  }
  
  static void module_fill_module(const WCHAR* in, WCHAR* out, size_t size)
  {
      const WCHAR *ptr, *endptr;
      size_t      len, l;
  
      ptr = get_filename(in, endptr = in + lstrlenW(in));
      len = min(endptr - ptr, size - 1);
      memcpy(out, ptr, len * sizeof(WCHAR));
      out[len] = '\0';
      if (len > 4 && (l = match_ext(out, len)))
          out[len - l] = '\0';
      else if (is_wine_loader(out))
          lstrcpynW(out, S_WineLoaderW, size);
      else
      {
          if (len > 3 && !wcsicmp(&out[len - 3], S_DotSoW) &&
              (l = match_ext(out, len - 3)))
              lstrcpyW(&out[len - l - 3], S_ElfW);
      }
      while ((*out = towlower(*out))) out++;
  }
  
  void module_set_module(struct module* module, const WCHAR* name)
  {
      module_fill_module(name, module->module.ModuleName, ARRAY_SIZE(module->module.ModuleName));
      module_fill_module(name, module->modulename, ARRAY_SIZE(module->modulename));
  }
  
  /* Returned string must be freed by caller */
  WCHAR *get_wine_loader_name(struct process *pcs)
  {
      const WCHAR *name;
      WCHAR* altname;
      unsigned len;
  
      name = process_getenv(pcs, L"WINELOADER");
      if (!name) name = pcs->is_64bit ? L"wine64" : L"wine";
      len = lstrlenW(name);
  
      /* WINELOADER isn't properly updated in Wow64 process calling inside Windows env block
       * (it's updated in ELF env block though)
       * So do the adaptation ourselves.
       */
      altname = HeapAlloc(GetProcessHeap(), 0, (len + 2 + 1) * sizeof(WCHAR));
      if (altname)
      {
          memcpy(altname, name, len * sizeof(WCHAR));
          if (pcs->is_64bit && len >= 2 && memcmp(name + len - 2, L"64", 2 * sizeof(WCHAR)) != 0)
              lstrcpyW(altname + len, L"64");
          else if (!pcs->is_64bit && len >= 2 && !memcmp(name + len - 2, L"64", 2 * sizeof(WCHAR)))
              altname[len - 2] = '\0';
          else
              altname[len] = '\0';
      }
  
      TRACE("returning %s\n", debugstr_w(altname));
      return altname;
  }
  
  static const char*      get_module_type(enum module_type type, BOOL virtual)
  {
      switch (type)
      {
      case DMT_ELF: return virtual ? "Virtual ELF" : "ELF";
      case DMT_PE: return virtual ? "Virtual PE" : "PE";
      case DMT_MACHO: return virtual ? "Virtual Mach-O" : "Mach-O";
      default: return "---";
      }
  }
  
  /***********************************************************************
   * Creates and links a new module to a process
   */
  struct module* module_new(struct process* pcs, const WCHAR* name,
                            enum module_type type, BOOL virtual,
                            DWORD64 mod_addr, DWORD64 size,
                            ULONG_PTR stamp, ULONG_PTR checksum, WORD machine)
  {
      struct module*      module;
      unsigned            i;
  
      assert(type == DMT_ELF || type == DMT_PE || type == DMT_MACHO);
      if (!(module = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*module))))
  	return NULL;
  
      module->next = pcs->lmodules;
      pcs->lmodules = module;
  
      TRACE("=> %s %s-%s %s\n",
            get_module_type(type, virtual),
  	  wine_dbgstr_longlong(mod_addr), wine_dbgstr_longlong(mod_addr + size),
            debugstr_w(name));
  
      pool_init(&module->pool, 65536);
  
      module->process = pcs;
      module->module.SizeOfStruct = sizeof(module->module);
      module->module.BaseOfImage = mod_addr;
      module->module.ImageSize = size;
      module_set_module(module, name);
      module->module.ImageName[0] = '\0';
      lstrcpynW(module->module.LoadedImageName, name, ARRAY_SIZE(module->module.LoadedImageName));
      module->module.SymType = SymNone;
      module->module.NumSyms = 0;
      module->module.TimeDateStamp = stamp;
      module->module.CheckSum = checksum;
  
      memset(module->module.LoadedPdbName, 0, sizeof(module->module.LoadedPdbName));
      module->module.CVSig = 0;
      memset(module->module.CVData, 0, sizeof(module->module.CVData));
      module->module.PdbSig = 0;
      memset(&module->module.PdbSig70, 0, sizeof(module->module.PdbSig70));
      module->module.PdbAge = 0;
      module->module.PdbUnmatched = FALSE;
      module->module.DbgUnmatched = FALSE;
      module->module.LineNumbers = FALSE;
      module->module.GlobalSymbols = FALSE;
      module->module.TypeInfo = FALSE;
      module->module.SourceIndexed = FALSE;
      module->module.Publics = FALSE;
      module->module.MachineType = machine;
      module->module.Reserved = 0;
  
      module->reloc_delta       = 0;
      module->type              = type;
      module->is_virtual        = virtual;
      for (i = 0; i < DFI_LAST; i++) module->format_info[i] = NULL;
      module->sortlist_valid    = FALSE;
      module->sorttab_size      = 0;
      module->addr_sorttab      = NULL;
      module->num_sorttab       = 0;
      module->num_symbols       = 0;
  
      vector_init(&module->vsymt, sizeof(struct symt*), 128);
      /* FIXME: this seems a bit too high (on a per module basis)
       * need some statistics about this
       */
      hash_table_init(&module->pool, &module->ht_symbols, 4096);
      hash_table_init(&module->pool, &module->ht_types,   4096);
      vector_init(&module->vtypes, sizeof(struct symt*),  32);
  
      module->sources_used      = 0;
      module->sources_alloc     = 0;
      module->sources           = 0;
      wine_rb_init(&module->sources_offsets_tree, source_rb_compare);
  
      /* add top level symbol */
      module->top = symt_new_module(module);
  
      return module;
  }
  
  /***********************************************************************
   *	module_find_by_nameW
   *
   */
  struct module* module_find_by_nameW(const struct process* pcs, const WCHAR* name)
  {
      struct module*      module;
  
      for (module = pcs->lmodules; module; module = module->next)
      {
          if (!wcsicmp(name, module->modulename)) return module;
      }
      SetLastError(ERROR_INVALID_NAME);
      return NULL;
  }
  
  struct module* module_find_by_nameA(const struct process* pcs, const char* name)
  {
      WCHAR wname[MAX_PATH];
  
      MultiByteToWideChar(CP_ACP, 0, name, -1, wname, ARRAY_SIZE(wname));
      return module_find_by_nameW(pcs, wname);
  }
  
  /***********************************************************************
   *	module_is_already_loaded
   *
   */
  struct module* module_is_already_loaded(const struct process* pcs, const WCHAR* name)
  {
      struct module*      module;
      const WCHAR*        filename;
  
      /* first compare the loaded image name... */
      for (module = pcs->lmodules; module; module = module->next)
      {
          if (!wcsicmp(name, module->module.LoadedImageName))
              return module;
      }
      /* then compare the standard filenames (without the path) ... */
      filename = get_filename(name, NULL);
      for (module = pcs->lmodules; module; module = module->next)
      {
          if (!wcsicmp(filename, get_filename(module->module.LoadedImageName, NULL)))
              return module;
      }
      SetLastError(ERROR_INVALID_NAME);
      return NULL;
  }
  
  /***********************************************************************
   *           module_get_container
   *
   */
  static struct module* module_get_container(const struct process* pcs,
                                      const struct module* inner)
  {
      struct module*      module;
       
      for (module = pcs->lmodules; module; module = module->next)
      {
          if (module != inner &&
              module->module.BaseOfImage <= inner->module.BaseOfImage &&
              module->module.BaseOfImage + module->module.ImageSize >=
              inner->module.BaseOfImage + inner->module.ImageSize)
              return module;
      }
      return NULL;
  }
  
  /***********************************************************************
   *           module_get_containee
   *
   */
  struct module* module_get_containee(const struct process* pcs, const struct module* outer)
  {
      struct module*      module;
  
      for (module = pcs->lmodules; module; module = module->next)
      {
          if (module != outer &&
              outer->module.BaseOfImage <= module->module.BaseOfImage &&
              outer->module.BaseOfImage + outer->module.ImageSize >=
              module->module.BaseOfImage + module->module.ImageSize)
              return module;
      }
      return NULL;
  }
  
  /******************************************************************
   *		module_get_debug
   *
   * get the debug information from a module:
   * - if the module's type is deferred, then force loading of debug info (and return
   *   the module itself)
   * - if the module has no debug info and has an ELF container, then return the ELF
   *   container (and also force the ELF container's debug info loading if deferred)
   * - otherwise return the module itself if it has some debug info
   */
  BOOL module_get_debug(struct module_pair* pair)
  {
      IMAGEHLP_DEFERRED_SYMBOL_LOADW64    idslW64;
  
      if (!pair->requested) return FALSE;
      /* for a PE builtin, always get info from container */
      if (!(pair->effective = module_get_container(pair->pcs, pair->requested)))
          pair->effective = pair->requested;
      /* if deferred, force loading */
      if (pair->effective->module.SymType == SymDeferred)
      {
          BOOL ret;
          
          if (pair->effective->is_virtual) ret = FALSE;
          else if (pair->effective->type == DMT_PE)
          {
              idslW64.SizeOfStruct = sizeof(idslW64);
              idslW64.BaseOfImage = pair->effective->module.BaseOfImage;
              idslW64.CheckSum = pair->effective->module.CheckSum;
              idslW64.TimeDateStamp = pair->effective->module.TimeDateStamp;
              memcpy(idslW64.FileName, pair->effective->module.ImageName,
                     sizeof(pair->effective->module.ImageName));
              idslW64.Reparse = FALSE;
              idslW64.hFile = INVALID_HANDLE_VALUE;
  
              pcs_callback(pair->pcs, CBA_DEFERRED_SYMBOL_LOAD_START, &idslW64);
              ret = pe_load_debug_info(pair->pcs, pair->effective);
              pcs_callback(pair->pcs,
                           ret ? CBA_DEFERRED_SYMBOL_LOAD_COMPLETE : CBA_DEFERRED_SYMBOL_LOAD_FAILURE,
                           &idslW64);
          }
          else ret = pair->pcs->loader->load_debug_info(pair->pcs, pair->effective);
  
          if (!ret) pair->effective->module.SymType = SymNone;
          assert(pair->effective->module.SymType != SymDeferred);
          pair->effective->module.NumSyms = pair->effective->ht_symbols.num_elts;
      }
      return pair->effective->module.SymType != SymNone;
  }
  
  /***********************************************************************
   *	module_find_by_addr
   *
   * either the addr where module is loaded, or any address inside the 
   * module
   */
  struct module* module_find_by_addr(const struct process* pcs, DWORD64 addr,
                                     enum module_type type)
  {
      struct module*      module;
      
      if (type == DMT_UNKNOWN)
      {
          if ((module = module_find_by_addr(pcs, addr, DMT_PE)) ||
              (module = module_find_by_addr(pcs, addr, DMT_ELF)) ||
              (module = module_find_by_addr(pcs, addr, DMT_MACHO)))
              return module;
      }
      else
      {
          for (module = pcs->lmodules; module; module = module->next)
          {
              if (type == module->type && addr >= module->module.BaseOfImage &&
                  addr < module->module.BaseOfImage + module->module.ImageSize) 
                  return module;
          }
      }
      SetLastError(ERROR_MOD_NOT_FOUND);
      return module;
  }
  
  /******************************************************************
   *		module_is_container_loaded
   *
   * checks whether the native container, for a (supposed) PE builtin is
   * already loaded
   */
  static BOOL module_is_container_loaded(const struct process* pcs,
                                         const WCHAR* ImageName, DWORD64 base)
  {
      size_t              len;
      struct module*      module;
      PCWSTR              filename, modname;
  
      if (!base) return FALSE;
      filename = get_filename(ImageName, NULL);
      len = lstrlenW(filename);
  
      for (module = pcs->lmodules; module; module = module->next)
      {
          if ((module->type == DMT_ELF || module->type == DMT_MACHO) &&
              base >= module->module.BaseOfImage &&
              base < module->module.BaseOfImage + module->module.ImageSize)
          {
              modname = get_filename(module->module.LoadedImageName, NULL);
              if (!wcsnicmp(modname, filename, len) &&
                  !memcmp(modname + len, S_DotSoW, 3 * sizeof(WCHAR)))
              {
                  return TRUE;
              }
          }
      }
      /* likely a native PE module */
      WARN("Couldn't find container for %s\n", debugstr_w(ImageName));
      return FALSE;
  }
  
  static BOOL image_check_debug_link(const WCHAR* file, struct image_file_map* fmap, DWORD link_crc)
  {
      DWORD read_bytes;
      HANDLE handle;
      WCHAR *path;
      WORD magic;
      BOOL ret;
  
      path = get_dos_file_name(file);
      handle = CreateFileW(path, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL);
      heap_free(path);
      if (handle == INVALID_HANDLE_VALUE) return FALSE;
  
      if (link_crc)
      {
          DWORD crc = calc_crc32(handle);
          if (crc != link_crc)
          {
              WARN("Bad CRC for file %s (got %08x while expecting %08x)\n",  debugstr_w(file), crc, link_crc);
              CloseHandle(handle);
              return FALSE;
          }
      }
  
      SetFilePointer(handle, 0, 0, FILE_BEGIN);
      if (ReadFile(handle, &magic, sizeof(magic), &read_bytes, NULL) && magic == IMAGE_DOS_SIGNATURE)
          ret = pe_map_file(handle, fmap, DMT_PE);
      else
          ret = elf_map_handle(handle, fmap);
      CloseHandle(handle);
      return ret;
  }
  
  /******************************************************************
   *		image_locate_debug_link
   *
   * Locate a filename from a .gnu_debuglink section, using the same
   * strategy as gdb:
   * "If the full name of the directory containing the executable is
   * execdir, and the executable has a debug link that specifies the
   * name debugfile, then GDB will automatically search for the
   * debugging information file in three places:
   *  - the directory containing the executable file (that is, it
   *    will look for a file named `execdir/debugfile',
   *  - a subdirectory of that directory named `.debug' (that is, the
   *    file `execdir/.debug/debugfile', and
   *  - a subdirectory of the global debug file directory that includes
   *    the executable's full path, and the name from the link (that is,
   *    the file `globaldebugdir/execdir/debugfile', where globaldebugdir
   *    is the global debug file directory, and execdir has been turned
   *    into a relative path)." (from GDB manual)
   */
  static BOOL image_locate_debug_link(const struct module* module, struct image_file_map* fmap, const char* filename, DWORD crc)
  {
      static const WCHAR globalDebugDirW[] = {'/','u','s','r','/','l','i','b','/','d','e','b','u','g','/'};
      static const WCHAR dotDebugW[] = {'.','d','e','b','u','g','/'};
      const size_t globalDebugDirLen = ARRAY_SIZE(globalDebugDirW);
      size_t filename_len, path_len;
      WCHAR* p = NULL;
      WCHAR* slash;
      WCHAR* slash2;
      struct image_file_map* fmap_link = NULL;
  
      fmap_link = HeapAlloc(GetProcessHeap(), 0, sizeof(*fmap_link));
      if (!fmap_link) return FALSE;
  
      filename_len = MultiByteToWideChar(CP_UNIXCP, 0, filename, -1, NULL, 0);
      path_len = lstrlenW(module->module.LoadedImageName);
      if (module->real_path) path_len = max(path_len, lstrlenW(module->real_path));
      p = HeapAlloc(GetProcessHeap(), 0,
                    (globalDebugDirLen + path_len + 6 + 1 + filename_len + 1) * sizeof(WCHAR));
      if (!p) goto found;
  
      /* we prebuild the string with "execdir" */
      lstrcpyW(p, module->module.LoadedImageName);
      slash = p;
      if ((slash2 = wcsrchr(slash, '/'))) slash = slash2 + 1;
      if ((slash2 = wcsrchr(slash, '\\'))) slash = slash2 + 1;
  
      /* testing execdir/filename */
      MultiByteToWideChar(CP_UNIXCP, 0, filename, -1, slash, filename_len);
      if (image_check_debug_link(p, fmap_link, crc)) goto found;
  
      /* testing execdir/.debug/filename */
      memcpy(slash, dotDebugW, sizeof(dotDebugW));
      MultiByteToWideChar(CP_UNIXCP, 0, filename, -1, slash + ARRAY_SIZE(dotDebugW), filename_len);
      if (image_check_debug_link(p, fmap_link, crc)) goto found;
  
      if (module->real_path)
      {
          lstrcpyW(p, module->real_path);
          slash = p;
          if ((slash2 = wcsrchr(slash, '/'))) slash = slash2 + 1;
          if ((slash2 = wcsrchr(slash, '\\'))) slash = slash2 + 1;
          MultiByteToWideChar(CP_UNIXCP, 0, filename, -1, slash, filename_len);
          if (image_check_debug_link(p, fmap_link, crc)) goto found;
      }
  
      /* testing globaldebugdir/execdir/filename */
      memmove(p + globalDebugDirLen, p, (slash - p) * sizeof(WCHAR));
      memcpy(p, globalDebugDirW, globalDebugDirLen * sizeof(WCHAR));
      slash += globalDebugDirLen;
      MultiByteToWideChar(CP_UNIXCP, 0, filename, -1, slash, filename_len);
      if (image_check_debug_link(p, fmap_link, crc)) goto found;
  
      /* finally testing filename */
      if (image_check_debug_link(slash, fmap_link, crc)) goto found;
  
  
      WARN("Couldn't locate or map %s\n", filename);
      HeapFree(GetProcessHeap(), 0, p);
      HeapFree(GetProcessHeap(), 0, fmap_link);
      return FALSE;
  
  found:
      TRACE("Located debug information file %s at %s\n", filename, debugstr_w(p));
      HeapFree(GetProcessHeap(), 0, p);
      fmap->alternate = fmap_link;
      return TRUE;
  }
  
  /******************************************************************
   *		image_locate_build_id_target
   *
   * Try to find the .so file containing the debug info out of the build-id note information
   */
  static BOOL image_locate_build_id_target(struct image_file_map* fmap, const BYTE* id, unsigned idlen)
  {
      static const WCHAR globalDebugDirW[] = {'/','u','s','r','/','l','i','b','/','d','e','b','u','g','/'};
      static const WCHAR buildidW[] = {'.','b','u','i','l','d','-','i','d','/'};
      static const WCHAR dotDebug0W[] = {'.','d','e','b','u','g',0};
      struct image_file_map* fmap_link = NULL;
      WCHAR* p;
      WCHAR* z;
      const BYTE* idend = id + idlen;
  
      fmap_link = HeapAlloc(GetProcessHeap(), 0, sizeof(*fmap_link));
      if (!fmap_link) return FALSE;
  
      p = HeapAlloc(GetProcessHeap(), 0,
                    sizeof(globalDebugDirW) + sizeof(buildidW) +
                    (idlen * 2 + 1) * sizeof(WCHAR) + sizeof(dotDebug0W));
      z = p;
      memcpy(z, globalDebugDirW, sizeof(globalDebugDirW));
      z += ARRAY_SIZE(globalDebugDirW);
      memcpy(z, buildidW, sizeof(buildidW));
      z += ARRAY_SIZE(buildidW);
  
      if (id < idend)
      {
          *z++ = "0123456789abcdef"[*id >> 4  ];
          *z++ = "0123456789abcdef"[*id & 0x0F];
          id++;
      }
      if (id < idend)
          *z++ = '/';
      while (id < idend)
      {
          *z++ = "0123456789abcdef"[*id >> 4  ];
          *z++ = "0123456789abcdef"[*id & 0x0F];
          id++;
      }
      memcpy(z, dotDebug0W, sizeof(dotDebug0W));
      TRACE("checking %s\n", wine_dbgstr_w(p));
  
      if (image_check_debug_link(p, fmap_link, 0))
      {
          struct image_section_map buildid_sect;
          if (image_find_section(fmap_link, ".note.gnu.build-id", &buildid_sect))
          {
              const UINT32* note;
  
              note = (const UINT32*)image_map_section(&buildid_sect);
              if (note != IMAGE_NO_MAP)
              {
                  /* the usual ELF note structure: name-size desc-size type <name> <desc> */
                  if (note[2] == NOTE_GNU_BUILD_ID)
                  {
                      if (note[1] == idlen &&
                          !memcmp(note + 3 + ((note[0] + 3) >> 2), idend - idlen, idlen))
                      {
                          TRACE("Located debug information file at %s\n", debugstr_w(p));
                          HeapFree(GetProcessHeap(), 0, p);
                          fmap->alternate = fmap_link;
                          return TRUE;
                      }
                      WARN("mismatch in buildid information for %s\n", wine_dbgstr_w(p));
                  }
              }
              image_unmap_section(&buildid_sect);
          }
          image_unmap_file(fmap_link);
      }
  
      TRACE("not found\n");
      HeapFree(GetProcessHeap(), 0, p);
      HeapFree(GetProcessHeap(), 0, fmap_link);
      return FALSE;
  }
  
  /******************************************************************
   *		image_check_alternate
   *
   * Load alternate files for a given image file, looking at either .note.gnu_build-id
   * or .gnu_debuglink sections.
   */
  BOOL image_check_alternate(struct image_file_map* fmap, const struct module* module)
  {
      BOOL ret = FALSE;
      BOOL found = FALSE;
      struct image_section_map buildid_sect, debuglink_sect;
  
      /* if present, add the .gnu_debuglink file as an alternate to current one */
      if (image_find_section(fmap, ".note.gnu.build-id", &buildid_sect))
      {
          const UINT32* note;
  
          found = TRUE;
          note = (const UINT32*)image_map_section(&buildid_sect);
          if (note != IMAGE_NO_MAP)
          {
              /* the usual ELF note structure: name-size desc-size type <name> <desc> */
              if (note[2] == NOTE_GNU_BUILD_ID)
              {
                  ret = image_locate_build_id_target(fmap, (const BYTE*)(note + 3 + ((note[0] + 3) >> 2)), note[1]);
              }
          }
          image_unmap_section(&buildid_sect);
      }
      /* if present, add the .gnu_debuglink file as an alternate to current one */
      if (!ret && image_find_section(fmap, ".gnu_debuglink", &debuglink_sect))
      {
          const char* dbg_link;
  
          found = TRUE;
          dbg_link = image_map_section(&debuglink_sect);
          if (dbg_link != IMAGE_NO_MAP)
          {
              /* The content of a debug link section is:
               * 1/ a NULL terminated string, containing the file name for the
               *    debug info
               * 2/ padding on 4 byte boundary
               * 3/ CRC of the linked file
               */
              DWORD crc = *(const DWORD*)(dbg_link + ((DWORD_PTR)(strlen(dbg_link) + 4) & ~3));
              ret = image_locate_debug_link(module, fmap, dbg_link, crc);
              if (!ret)
                  WARN("Couldn't load linked debug file for %s\n",
                       debugstr_w(module->modulename));
          }
          image_unmap_section(&debuglink_sect);
      }
      return found ? ret : TRUE;
  }
  
  /***********************************************************************
   *			SymLoadModule (DBGHELP.@)
   */
  DWORD WINAPI SymLoadModule(HANDLE hProcess, HANDLE hFile, PCSTR ImageName,
                             PCSTR ModuleName, DWORD BaseOfDll, DWORD SizeOfDll)
  {
      return SymLoadModuleEx(hProcess, hFile, ImageName, ModuleName, BaseOfDll,
                             SizeOfDll, NULL, 0);
  }
  
  /***********************************************************************
   *			SymLoadModuleEx (DBGHELP.@)
   */
  DWORD64 WINAPI  SymLoadModuleEx(HANDLE hProcess, HANDLE hFile, PCSTR ImageName,
                                  PCSTR ModuleName, DWORD64 BaseOfDll, DWORD DllSize,
                                  PMODLOAD_DATA Data, DWORD Flags)
  {
      PWSTR       wImageName, wModuleName;
      unsigned    len;
      DWORD64     ret;
  
      TRACE("(%p %p %s %s %s %08x %p %08x)\n",
            hProcess, hFile, debugstr_a(ImageName), debugstr_a(ModuleName),
            wine_dbgstr_longlong(BaseOfDll), DllSize, Data, Flags);
  
      if (ImageName)
      {
          len = MultiByteToWideChar(CP_ACP, 0, ImageName, -1, NULL, 0);
          wImageName = HeapAlloc(GetProcessHeap(), 0, len * sizeof(WCHAR));
          MultiByteToWideChar(CP_ACP, 0, ImageName, -1, wImageName, len);
      }
      else wImageName = NULL;
      if (ModuleName)
      {
          len = MultiByteToWideChar(CP_ACP, 0, ModuleName, -1, NULL, 0);
          wModuleName = HeapAlloc(GetProcessHeap(), 0, len * sizeof(WCHAR));
          MultiByteToWideChar(CP_ACP, 0, ModuleName, -1, wModuleName, len);
      }
      else wModuleName = NULL;
  
      ret = SymLoadModuleExW(hProcess, hFile, wImageName, wModuleName,
                            BaseOfDll, DllSize, Data, Flags);
      HeapFree(GetProcessHeap(), 0, wImageName);
      HeapFree(GetProcessHeap(), 0, wModuleName);
      return ret;
  }
  
  /***********************************************************************
   *			SymLoadModuleExW (DBGHELP.@)
   */
  DWORD64 WINAPI  SymLoadModuleExW(HANDLE hProcess, HANDLE hFile, PCWSTR wImageName,
                                   PCWSTR wModuleName, DWORD64 BaseOfDll, DWORD SizeOfDll,
                                   PMODLOAD_DATA Data, DWORD Flags)
  {
      struct process*     pcs;
      struct module*	module = NULL;
  
      TRACE("(%p %p %s %s %s %08x %p %08x)\n",
            hProcess, hFile, debugstr_w(wImageName), debugstr_w(wModuleName),
            wine_dbgstr_longlong(BaseOfDll), SizeOfDll, Data, Flags);
  
      if (Data)
          FIXME("Unsupported load data parameter %p for %s\n",
                Data, debugstr_w(wImageName));
  
      if (!(pcs = process_find_by_handle(hProcess))) return 0;
  
      if (Flags & SLMFLAG_VIRTUAL)
      {
          if (!wImageName) return 0;
          module = module_new(pcs, wImageName, DMT_PE, TRUE, BaseOfDll, SizeOfDll, 0, 0, IMAGE_FILE_MACHINE_UNKNOWN);
          if (!module) return 0;
          if (wModuleName) module_set_module(module, wModuleName);
          module->module.SymType = SymVirtual;
  
          return module->module.BaseOfImage;
      }
      if (Flags & ~(SLMFLAG_VIRTUAL))
          FIXME("Unsupported Flags %08x for %s\n", Flags, debugstr_w(wImageName));
  
      if (!validate_addr64(BaseOfDll)) return 0;
  
      pcs->loader->synchronize_module_list(pcs);
  
      /* this is a Wine extension to the API just to redo the synchronisation */
      if (!wImageName && !hFile) return 0;
  
      /* check if the module is already loaded, or if it's a builtin PE module with
       * an containing ELF module
       */
      if (wImageName)
      {
          module = module_is_already_loaded(pcs, wImageName);
          if (module)
          {
              if (module->module.BaseOfImage == BaseOfDll)
                  SetLastError(ERROR_SUCCESS);
              else
              {
                  /* native allows to load the same module at different addresses
                   * we don't support this for now
                   */
                  SetLastError(ERROR_INVALID_PARAMETER);
                  FIXME("Reloading %s at different base address isn't supported\n", debugstr_w(module->modulename));
              }
              return 0;
          }
          if (!module && module_is_container_loaded(pcs, wImageName, BaseOfDll))
          {
              /* force the loading of DLL as builtin */
              module = pe_load_builtin_module(pcs, wImageName, BaseOfDll, SizeOfDll);
          }
      }
      if (!module)
      {
          /* otherwise, try a regular PE module */
          if (!(module = pe_load_native_module(pcs, wImageName, hFile, BaseOfDll, SizeOfDll)) &&
              wImageName)
          {
              /* and finally an ELF or Mach-O module */
              module = pcs->loader->load_module(pcs, wImageName, BaseOfDll);
          }
      }
      if (!module)
      {
          WARN("Couldn't locate %s\n", debugstr_w(wImageName));
          return 0;
      }
      module->module.NumSyms = module->ht_symbols.num_elts;
      /* by default module_new fills module.ModuleName from a derivation
       * of LoadedImageName. Overwrite it, if we have better information
       */
      if (wModuleName)
          module_set_module(module, wModuleName);
      if (wImageName)
          lstrcpynW(module->module.ImageName, wImageName, ARRAY_SIZE(module->module.ImageName));
  
      return module->module.BaseOfImage;
  }
  
  /***********************************************************************
   *                     SymLoadModule64 (DBGHELP.@)
   */
  DWORD64 WINAPI SymLoadModule64(HANDLE hProcess, HANDLE hFile, PCSTR ImageName,
                                 PCSTR ModuleName, DWORD64 BaseOfDll, DWORD SizeOfDll)
  {
      return SymLoadModuleEx(hProcess, hFile, ImageName, ModuleName, BaseOfDll, SizeOfDll,
                             NULL, 0);
  }
  
  /******************************************************************
   *		module_remove
   *
   */
  BOOL module_remove(struct process* pcs, struct module* module)
  {
      struct module_format*modfmt;
      struct module**     p;
      unsigned            i;
  
      TRACE("%s (%p)\n", debugstr_w(module->modulename), module);
  
      for (i = 0; i < DFI_LAST; i++)
      {
          if ((modfmt = module->format_info[i]) && modfmt->remove)
              modfmt->remove(pcs, module->format_info[i]);
      }
      hash_table_destroy(&module->ht_symbols);
      hash_table_destroy(&module->ht_types);
      HeapFree(GetProcessHeap(), 0, module->sources);
      HeapFree(GetProcessHeap(), 0, module->addr_sorttab);
      HeapFree(GetProcessHeap(), 0, module->real_path);
      pool_destroy(&module->pool);
      /* native dbghelp doesn't invoke registered callback(,CBA_SYMBOLS_UNLOADED,) here
       * so do we
       */
      for (p = &pcs->lmodules; *p; p = &(*p)->next)
      {
          if (*p == module)
          {
              *p = module->next;
              HeapFree(GetProcessHeap(), 0, module);
              return TRUE;
          }
      }
      FIXME("This shouldn't happen\n");
      return FALSE;
  }
  
  /******************************************************************
   *		SymUnloadModule (DBGHELP.@)
   *
   */
  BOOL WINAPI SymUnloadModule(HANDLE hProcess, DWORD BaseOfDll)
  {
      struct process*     pcs;
      struct module*      module;
  
      pcs = process_find_by_handle(hProcess);
      if (!pcs) return FALSE;
      module = module_find_by_addr(pcs, BaseOfDll, DMT_UNKNOWN);
      if (!module) return FALSE;
      return module_remove(pcs, module);
  }
  
  /******************************************************************
   *		SymUnloadModule64 (DBGHELP.@)
   *
   */
  BOOL WINAPI SymUnloadModule64(HANDLE hProcess, DWORD64 BaseOfDll)
  {
      struct process*     pcs;
      struct module*      module;
  
      pcs = process_find_by_handle(hProcess);
      if (!pcs) return FALSE;
      module = module_find_by_addr(pcs, BaseOfDll, DMT_UNKNOWN);
      if (!module) return FALSE;
      return module_remove(pcs, module);
  }
  
  /******************************************************************
   *		SymEnumerateModules (DBGHELP.@)
   *
   */
  struct enum_modW64_32
  {
      PSYM_ENUMMODULES_CALLBACK   cb;
      PVOID                       user;
      char                        module[MAX_PATH];
  };
  
  static BOOL CALLBACK enum_modW64_32(PCWSTR name, DWORD64 base, PVOID user)
  {
      struct enum_modW64_32*      x = user;
  
      WideCharToMultiByte(CP_ACP, 0, name, -1, x->module, sizeof(x->module), NULL, NULL);
      return x->cb(x->module, (DWORD)base, x->user);
  }
  
  BOOL  WINAPI SymEnumerateModules(HANDLE hProcess,
                                   PSYM_ENUMMODULES_CALLBACK EnumModulesCallback,  
                                   PVOID UserContext)
  {
      struct enum_modW64_32       x;
  
      x.cb = EnumModulesCallback;
      x.user = UserContext;
  
      return SymEnumerateModulesW64(hProcess, enum_modW64_32, &x);
  }
  
  /******************************************************************
   *		SymEnumerateModules64 (DBGHELP.@)
   *
   */
  struct enum_modW64_64
  {
      PSYM_ENUMMODULES_CALLBACK64 cb;
      PVOID                       user;
      char                        module[MAX_PATH];
  };
  
  static BOOL CALLBACK enum_modW64_64(PCWSTR name, DWORD64 base, PVOID user)
  {
      struct enum_modW64_64*      x = user;
  
      WideCharToMultiByte(CP_ACP, 0, name, -1, x->module, sizeof(x->module), NULL, NULL);
      return x->cb(x->module, base, x->user);
  }
  
  BOOL  WINAPI SymEnumerateModules64(HANDLE hProcess,
                                     PSYM_ENUMMODULES_CALLBACK64 EnumModulesCallback,  
                                     PVOID UserContext)
  {
      struct enum_modW64_64       x;
  
      x.cb = EnumModulesCallback;
      x.user = UserContext;
  
      return SymEnumerateModulesW64(hProcess, enum_modW64_64, &x);
  }
  
  /******************************************************************
   *		SymEnumerateModulesW64 (DBGHELP.@)
   *
   */
  BOOL  WINAPI SymEnumerateModulesW64(HANDLE hProcess,
                                      PSYM_ENUMMODULES_CALLBACKW64 EnumModulesCallback,
                                      PVOID UserContext)
  {
      struct process*     pcs = process_find_by_handle(hProcess);
      struct module*      module;
  
      if (!pcs) return FALSE;
      
      for (module = pcs->lmodules; module; module = module->next)
      {
          if (!dbghelp_opt_native &&
              (module->type == DMT_ELF || module->type == DMT_MACHO))
              continue;
          if (!EnumModulesCallback(module->modulename,
                                   module->module.BaseOfImage, UserContext))
              break;
      }
      return TRUE;
  }
  
  /******************************************************************
   *		EnumerateLoadedModules64 (DBGHELP.@)
   *
   */
  struct enum_load_modW64_64
  {
      PENUMLOADED_MODULES_CALLBACK64      cb;
      PVOID                               user;
      char                                module[MAX_PATH];
  };
  
  static BOOL CALLBACK enum_load_modW64_64(PCWSTR name, DWORD64 base, ULONG size,
                                           PVOID user)
  {
      struct enum_load_modW64_64* x = user;
  
      WideCharToMultiByte(CP_ACP, 0, name, -1, x->module, sizeof(x->module), NULL, NULL);
      return x->cb(x->module, base, size, x->user);
  }
  
  BOOL  WINAPI EnumerateLoadedModules64(HANDLE hProcess,
                                        PENUMLOADED_MODULES_CALLBACK64 EnumLoadedModulesCallback,
                                        PVOID UserContext)
  {
      struct enum_load_modW64_64  x;
  
      x.cb = EnumLoadedModulesCallback;
      x.user = UserContext;
  
      return EnumerateLoadedModulesW64(hProcess, enum_load_modW64_64, &x);
  }
  
  /******************************************************************
   *		EnumerateLoadedModules (DBGHELP.@)
   *
   */
  struct enum_load_modW64_32
  {
      PENUMLOADED_MODULES_CALLBACK        cb;
      PVOID                               user;
      char                                module[MAX_PATH];
  };
  
  static BOOL CALLBACK enum_load_modW64_32(PCWSTR name, DWORD64 base, ULONG size,
                                           PVOID user)
  {
      struct enum_load_modW64_32* x = user;
      WideCharToMultiByte(CP_ACP, 0, name, -1, x->module, sizeof(x->module), NULL, NULL);
      return x->cb(x->module, (DWORD)base, size, x->user);
  }
  
  BOOL  WINAPI EnumerateLoadedModules(HANDLE hProcess,
                                      PENUMLOADED_MODULES_CALLBACK EnumLoadedModulesCallback,
                                      PVOID UserContext)
  {
      struct enum_load_modW64_32  x;
  
      x.cb = EnumLoadedModulesCallback;
      x.user = UserContext;
  
      return EnumerateLoadedModulesW64(hProcess, enum_load_modW64_32, &x);
  }
  
  /******************************************************************
   *		EnumerateLoadedModulesW64 (DBGHELP.@)
   *
   */
  BOOL  WINAPI EnumerateLoadedModulesW64(HANDLE hProcess,
                                         PENUMLOADED_MODULES_CALLBACKW64 EnumLoadedModulesCallback,
                                         PVOID UserContext)
  {
      HMODULE*    hMods;
      WCHAR       baseW[256], modW[256];
      DWORD       i, sz;
      MODULEINFO  mi;
  
      hMods = HeapAlloc(GetProcessHeap(), 0, 256 * sizeof(hMods[0]));
      if (!hMods) return FALSE;
  
      if (!EnumProcessModules(hProcess, hMods, 256 * sizeof(hMods[0]), &sz))
      {
          /* hProcess should also be a valid process handle !! */
          FIXME("If this happens, bump the number in mod\n");
          HeapFree(GetProcessHeap(), 0, hMods);
          return FALSE;
      }
      sz /= sizeof(HMODULE);
      for (i = 0; i < sz; i++)
      {
          if (!GetModuleInformation(hProcess, hMods[i], &mi, sizeof(mi)) ||
              !GetModuleBaseNameW(hProcess, hMods[i], baseW, ARRAY_SIZE(baseW)))
              continue;
          module_fill_module(baseW, modW, ARRAY_SIZE(modW));
          EnumLoadedModulesCallback(modW, (DWORD_PTR)mi.lpBaseOfDll, mi.SizeOfImage,
                                    UserContext);
      }
      HeapFree(GetProcessHeap(), 0, hMods);
  
      return sz != 0 && i == sz;
  }
  
  static void dbghelp_str_WtoA(const WCHAR *src, char *dst, int dst_len)
  {
      WideCharToMultiByte(CP_ACP, 0, src, -1, dst, dst_len - 1, NULL, NULL);
      dst[dst_len - 1] = 0;
  }
  
  /******************************************************************
   *		SymGetModuleInfo (DBGHELP.@)
   *
   */
  BOOL  WINAPI SymGetModuleInfo(HANDLE hProcess, DWORD dwAddr,
                                PIMAGEHLP_MODULE ModuleInfo)
  {
      IMAGEHLP_MODULE     mi;
      IMAGEHLP_MODULEW64  miw64;
  
      if (sizeof(mi) < ModuleInfo->SizeOfStruct) FIXME("Wrong size\n");
  
      miw64.SizeOfStruct = sizeof(miw64);
      if (!SymGetModuleInfoW64(hProcess, dwAddr, &miw64)) return FALSE;
  
      mi.SizeOfStruct  = ModuleInfo->SizeOfStruct;
      mi.BaseOfImage   = miw64.BaseOfImage;
      mi.ImageSize     = miw64.ImageSize;
      mi.TimeDateStamp = miw64.TimeDateStamp;
      mi.CheckSum      = miw64.CheckSum;
      mi.NumSyms       = miw64.NumSyms;
      mi.SymType       = miw64.SymType;
      dbghelp_str_WtoA(miw64.ModuleName, mi.ModuleName, sizeof(mi.ModuleName));
      dbghelp_str_WtoA(miw64.ImageName, mi.ImageName, sizeof(mi.ImageName));
      dbghelp_str_WtoA(miw64.LoadedImageName, mi.LoadedImageName, sizeof(mi.LoadedImageName));
  
      memcpy(ModuleInfo, &mi, ModuleInfo->SizeOfStruct);
  
      return TRUE;
  }
  
  /******************************************************************
   *		SymGetModuleInfoW (DBGHELP.@)
   *
   */
  BOOL  WINAPI SymGetModuleInfoW(HANDLE hProcess, DWORD dwAddr,
                                 PIMAGEHLP_MODULEW ModuleInfo)
  {
      IMAGEHLP_MODULEW64  miw64;
      IMAGEHLP_MODULEW    miw;
  
      if (sizeof(miw) < ModuleInfo->SizeOfStruct) FIXME("Wrong size\n");
  
      miw64.SizeOfStruct = sizeof(miw64);
      if (!SymGetModuleInfoW64(hProcess, dwAddr, &miw64)) return FALSE;
  
      miw.SizeOfStruct  = ModuleInfo->SizeOfStruct;
      miw.BaseOfImage   = miw64.BaseOfImage;
      miw.ImageSize     = miw64.ImageSize;
      miw.TimeDateStamp = miw64.TimeDateStamp;
      miw.CheckSum      = miw64.CheckSum;
      miw.NumSyms       = miw64.NumSyms;
      miw.SymType       = miw64.SymType;
      lstrcpyW(miw.ModuleName, miw64.ModuleName);
      lstrcpyW(miw.ImageName, miw64.ImageName);
      lstrcpyW(miw.LoadedImageName, miw64.LoadedImageName);
      memcpy(ModuleInfo, &miw, ModuleInfo->SizeOfStruct);
  
      return TRUE;
  }
  
  /******************************************************************
   *		SymGetModuleInfo64 (DBGHELP.@)
   *
   */
  BOOL  WINAPI SymGetModuleInfo64(HANDLE hProcess, DWORD64 dwAddr,
                                  PIMAGEHLP_MODULE64 ModuleInfo)
  {
      IMAGEHLP_MODULE64   mi64;
      IMAGEHLP_MODULEW64  miw64;
  
      if (sizeof(mi64) < ModuleInfo->SizeOfStruct)
      {
          SetLastError(ERROR_MOD_NOT_FOUND); /* NOTE: native returns this error */
          WARN("Wrong size %u\n", ModuleInfo->SizeOfStruct);
          return FALSE;
      }
  
      miw64.SizeOfStruct = sizeof(miw64);
      if (!SymGetModuleInfoW64(hProcess, dwAddr, &miw64)) return FALSE;
  
      mi64.SizeOfStruct  = ModuleInfo->SizeOfStruct;
      mi64.BaseOfImage   = miw64.BaseOfImage;
      mi64.ImageSize     = miw64.ImageSize;
      mi64.TimeDateStamp = miw64.TimeDateStamp;
      mi64.CheckSum      = miw64.CheckSum;
      mi64.NumSyms       = miw64.NumSyms;
      mi64.SymType       = miw64.SymType;
      dbghelp_str_WtoA(miw64.ModuleName, mi64.ModuleName, sizeof(mi64.ModuleName));
      dbghelp_str_WtoA(miw64.ImageName, mi64.ImageName, sizeof(mi64.ImageName));
      dbghelp_str_WtoA(miw64.LoadedImageName, mi64.LoadedImageName, sizeof(mi64.LoadedImageName));
      dbghelp_str_WtoA(miw64.LoadedPdbName, mi64.LoadedPdbName, sizeof(mi64.LoadedPdbName));
  
      mi64.CVSig         = miw64.CVSig;
      dbghelp_str_WtoA(miw64.CVData, mi64.CVData, sizeof(mi64.CVData));
      mi64.PdbSig        = miw64.PdbSig;
      mi64.PdbSig70      = miw64.PdbSig70;
      mi64.PdbAge        = miw64.PdbAge;
      mi64.PdbUnmatched  = miw64.PdbUnmatched;
      mi64.DbgUnmatched  = miw64.DbgUnmatched;
      mi64.LineNumbers   = miw64.LineNumbers;
      mi64.GlobalSymbols = miw64.GlobalSymbols;
      mi64.TypeInfo      = miw64.TypeInfo;
      mi64.SourceIndexed = miw64.SourceIndexed;
      mi64.Publics       = miw64.Publics;
      mi64.MachineType   = miw64.MachineType;
      mi64.Reserved      = miw64.Reserved;
  
      memcpy(ModuleInfo, &mi64, ModuleInfo->SizeOfStruct);
  
      return TRUE;
  }
  
  /******************************************************************
   *		SymGetModuleInfoW64 (DBGHELP.@)
   *
   */
  BOOL  WINAPI SymGetModuleInfoW64(HANDLE hProcess, DWORD64 dwAddr,
                                   PIMAGEHLP_MODULEW64 ModuleInfo)
  {
      struct process*     pcs = process_find_by_handle(hProcess);
      struct module*      module;
      IMAGEHLP_MODULEW64  miw64;
  
      TRACE("%p %s %p\n", hProcess, wine_dbgstr_longlong(dwAddr), ModuleInfo);
  
      if (!pcs) return FALSE;
      if (ModuleInfo->SizeOfStruct > sizeof(*ModuleInfo)) return FALSE;
      module = module_find_by_addr(pcs, dwAddr, DMT_UNKNOWN);
      if (!module) return FALSE;
  
      miw64 = module->module;
  
      /* update debug information from container if any */
      if (module->module.SymType == SymNone)
      {
          module = module_get_container(pcs, module);
          if (module && module->module.SymType != SymNone)
          {
              miw64.SymType = module->module.SymType;
              miw64.NumSyms = module->module.NumSyms;
          }
      }
      memcpy(ModuleInfo, &miw64, ModuleInfo->SizeOfStruct);
      return TRUE;
  }
  
  /***********************************************************************
   *		SymGetModuleBase (DBGHELP.@)
   */
  DWORD WINAPI SymGetModuleBase(HANDLE hProcess, DWORD dwAddr)
  {
      DWORD64     ret;
  
      ret = SymGetModuleBase64(hProcess, dwAddr);
      return validate_addr64(ret) ? ret : 0;
  }
  
  /***********************************************************************
   *		SymGetModuleBase64 (DBGHELP.@)
   */
  DWORD64 WINAPI SymGetModuleBase64(HANDLE hProcess, DWORD64 dwAddr)
  {
      struct process*     pcs = process_find_by_handle(hProcess);
      struct module*      module;
  
      if (!pcs) return 0;
      module = module_find_by_addr(pcs, dwAddr, DMT_UNKNOWN);
      if (!module) return 0;
      return module->module.BaseOfImage;
  }
  
  /******************************************************************
   *		module_reset_debug_info
   * Removes any debug information linked to a given module.
   */
  void module_reset_debug_info(struct module* module)
  {
      module->sortlist_valid = TRUE;
      module->sorttab_size = 0;
      module->addr_sorttab = NULL;
      module->num_sorttab = module->num_symbols = 0;
      hash_table_destroy(&module->ht_symbols);
      module->ht_symbols.num_buckets = 0;
      module->ht_symbols.buckets = NULL;
      hash_table_destroy(&module->ht_types);
      module->ht_types.num_buckets = 0;
      module->ht_types.buckets = NULL;
      module->vtypes.num_elts = 0;
      hash_table_destroy(&module->ht_symbols);
      module->sources_used = module->sources_alloc = 0;
      module->sources = NULL;
  }
  
  /******************************************************************
   *              SymRefreshModuleList (DBGHELP.@)
   */
  BOOL WINAPI SymRefreshModuleList(HANDLE hProcess)
  {
      struct process*     pcs;
  
      TRACE("(%p)\n", hProcess);
  
      if (!(pcs = process_find_by_handle(hProcess))) return FALSE;
  
      return pcs->loader->synchronize_module_list(pcs);
  }
  
  /***********************************************************************
   *		SymFunctionTableAccess (DBGHELP.@)
   */
  PVOID WINAPI SymFunctionTableAccess(HANDLE hProcess, DWORD AddrBase)
  {
      return SymFunctionTableAccess64(hProcess, AddrBase);
  }
  
  /***********************************************************************
   *		SymFunctionTableAccess64 (DBGHELP.@)
   */
  PVOID WINAPI SymFunctionTableAccess64(HANDLE hProcess, DWORD64 AddrBase)
  {
      struct process*     pcs = process_find_by_handle(hProcess);
      struct module*      module;
  
      if (!pcs || !dbghelp_current_cpu->find_runtime_function) return NULL;
      module = module_find_by_addr(pcs, AddrBase, DMT_UNKNOWN);
      if (!module) return NULL;
  
      return dbghelp_current_cpu->find_runtime_function(module, AddrBase);
  }
  
  static BOOL native_synchronize_module_list(struct process* pcs)
  {
      return FALSE;
  }
  
  static struct module* native_load_module(struct process* pcs, const WCHAR* name, ULONG_PTR addr)
  {
      return NULL;
  }
  
  static BOOL native_load_debug_info(struct process* process, struct module* module)
  {
      return FALSE;
  }
  
  static BOOL native_enum_modules(struct process *process, enum_modules_cb cb, void* user)
  {
      return FALSE;
  }
  
  static BOOL native_fetch_file_info(struct process* process, const WCHAR* name, ULONG_PTR load_addr, DWORD_PTR* base,
                                     DWORD* size, DWORD* checksum)
  {
      return FALSE;
  }
  
  const struct loader_ops no_loader_ops =
  {
      native_synchronize_module_list,
      native_load_module,
      native_load_debug_info,
      native_enum_modules,
      native_fetch_file_info,
  };
  