dlls/ntdll/loader.c

   1 /*
   2  * Loader functions
   3  *
   4  * Copyright 1995, 2003 Alexandre Julliard
   5  * Copyright 2002 Dmitry Timoshkov for Codeweavers
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 #include <assert.h>
  23
  24 #include "winbase.h"
  25 #include "winnt.h"
  26 #include "winternl.h"
  27
  28 #include "module.h"
  29 #include "file.h"
  30 #include "wine/exception.h"
  31 #include "excpt.h"
  32 #include "snoop.h"
  33 #include "wine/debug.h"
  34 #include "wine/server.h"
  35 #include "ntdll_misc.h"
  36
  37 WINE_DEFAULT_DEBUG_CHANNEL(module);
  38 WINE_DECLARE_DEBUG_CHANNEL(relay);
  39 WINE_DECLARE_DEBUG_CHANNEL(snoop);
  40 WINE_DECLARE_DEBUG_CHANNEL(loaddll);
  41
  42 typedef DWORD (CALLBACK *DLLENTRYPROC)(HMODULE,DWORD,LPVOID);
  43
  44 WINE_MODREF *MODULE_modref_list = NULL;
  45
  46 static WINE_MODREF *exe_modref;
  47 static int process_detaching = 0;  /* set on process detach to avoid deadlocks with thread detach */
  48 static int free_lib_count;   /* recursion depth of LdrUnloadDll calls */
  49
  50 /* filter for page-fault exceptions */
  51 static WINE_EXCEPTION_FILTER(page_fault)
  52 {
  53     if (GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION)
  54         return EXCEPTION_EXECUTE_HANDLER;
  55     return EXCEPTION_CONTINUE_SEARCH;
  56 }
  57
  58 static CRITICAL_SECTION loader_section = CRITICAL_SECTION_INIT( "loader_section" );
  59 static WINE_MODREF *cached_modref;
  60
  61 static NTSTATUS load_dll( LPCSTR libname, DWORD flags, WINE_MODREF** pwm );
  62 static FARPROC find_named_export( HMODULE module, IMAGE_EXPORT_DIRECTORY *exports,
  63                                   DWORD exp_size, const char *name, int hint );
  64
  65 /* convert PE image VirtualAddress to Real Address */
  66 inline static void *get_rva( HMODULE module, DWORD va )
  67 {
  68     return (void *)((char *)module + va);
  69 }
  70
  71 /*************************************************************************
  72  *              get_modref
  73  *
  74  * Looks for the referenced HMODULE in the current process
  75  * The loader_section must be locked while calling this function.
  76  */
  77 static WINE_MODREF *get_modref( HMODULE hmod )
  78 {
  79     WINE_MODREF *wm;
  80
  81     if (cached_modref && cached_modref->ldr.BaseAddress == hmod) return cached_modref;
  82
  83     for ( wm = MODULE_modref_list; wm; wm=wm->next )
  84     {
  85         if (wm->ldr.BaseAddress == hmod)
  86         {
  87             cached_modref = wm;
  88             break;
  89         }
  90     }
  91     return wm;
  92 }
  93
  94
  95 /*************************************************************************
  96  *              find_forwarded_export
  97  *
  98  * Find the final function pointer for a forwarded function.
  99  * The loader_section must be locked while calling this function.
 100  */
 101 static FARPROC find_forwarded_export( HMODULE module, const char *forward )
 102 {
 103     IMAGE_EXPORT_DIRECTORY *exports;
 104     DWORD exp_size;
 105     WINE_MODREF *wm;
 106     char mod_name[256];
 107     char *end = strchr(forward, '.');
 108     FARPROC proc = NULL;
 109
 110     if (!end) return NULL;
 111     if (end - forward >= sizeof(mod_name)) return NULL;
 112     memcpy( mod_name, forward, end - forward );
 113     mod_name[end-forward] = 0;
 114
 115     if (!(wm = MODULE_FindModule( mod_name )))
 116     {
 117         WINE_MODREF *user = get_modref( module );
 118         ERR("module not found for forward '%s' used by '%s'\n", forward, user->filename );
 119         return NULL;
 120     }
 121     if ((exports = RtlImageDirectoryEntryToData( wm->ldr.BaseAddress, TRUE,
 122                                                  IMAGE_DIRECTORY_ENTRY_EXPORT, &exp_size )))
 123         proc = find_named_export( wm->ldr.BaseAddress, exports, exp_size, end + 1, -1 );
 124
 125     if (!proc)
 126     {
 127         WINE_MODREF *user = get_modref( module );
 128         ERR("function not found for forward '%s' used by '%s'."
 129             " If you are using builtin '%s', try using the native one instead.\n",
 130             forward, user->filename, user->modname );
 131     }
 132     return proc;
 133 }
 134
 135
 136 /*************************************************************************
 137  *              find_ordinal_export
 138  *
 139  * Find an exported function by ordinal.
 140  * The exports base must have been subtracted from the ordinal already.
 141  * The loader_section must be locked while calling this function.
 142  */
 143 static FARPROC find_ordinal_export( HMODULE module, IMAGE_EXPORT_DIRECTORY *exports,
 144                                     DWORD exp_size, int ordinal )
 145 {
 146     FARPROC proc;
 147     WORD *ordinals = get_rva( module, exports->AddressOfNameOrdinals );
 148     DWORD *functions = get_rva( module, exports->AddressOfFunctions );
 149
 150     if (ordinal >= exports->NumberOfFunctions)
 151     {
 152         TRACE(" ordinal %ld out of range!\n", ordinal + exports->Base );
 153         return NULL;
 154     }
 155     if (!functions[ordinal]) return NULL;
 156
 157     proc = get_rva( module, functions[ordinal] );
 158
 159     /* if the address falls into the export dir, it's a forward */
 160     if (((char *)proc >= (char *)exports) && ((char *)proc < (char *)exports + exp_size))
 161         return find_forwarded_export( module, (char *)proc );
 162
 163     if (TRACE_ON(snoop))
 164     {
 165         /* try to find a name for it */
 166         int i;
 167         char *ename = "@";
 168         DWORD *name = get_rva( module, exports->AddressOfNames );
 169         if (name) for (i = 0; i < exports->NumberOfNames; i++)
 170         {
 171             if (ordinals[i] == ordinal)
 172             {
 173                 ename = get_rva( module, name[i] );
 174                 break;
 175             }
 176         }
 177         proc = SNOOP_GetProcAddress( module, ename, ordinal, proc );
 178     }
 179     return proc;
 180 }
 181
 182
 183 /*************************************************************************
 184  *              find_named_export
 185  *
 186  * Find an exported function by name.
 187  * The loader_section must be locked while calling this function.
 188  */
 189 static FARPROC find_named_export( HMODULE module, IMAGE_EXPORT_DIRECTORY *exports,
 190                                   DWORD exp_size, const char *name, int hint )
 191 {
 192     WORD *ordinals = get_rva( module, exports->AddressOfNameOrdinals );
 193     DWORD *names = get_rva( module, exports->AddressOfNames );
 194     int min = 0, max = exports->NumberOfNames - 1;
 195
 196     /* first check the hint */
 197     if (hint >= 0 && hint <= max)
 198     {
 199         char *ename = get_rva( module, names[hint] );
 200         if (!strcmp( ename, name ))
 201             return find_ordinal_export( module, exports, exp_size, ordinals[hint] );
 202     }
 203
 204     /* then do a binary search */
 205     while (min <= max)
 206     {
 207         int res, pos = (min + max) / 2;
 208         char *ename = get_rva( module, names[pos] );
 209         if (!(res = strcmp( ename, name )))
 210             return find_ordinal_export( module, exports, exp_size, ordinals[pos] );
 211         if (res > 0) max = pos - 1;
 212         else min = pos + 1;
 213     }
 214     return NULL;
 215
 216 }
 217
 218
 219 /*************************************************************************
 220  *              import_dll
 221  *
 222  * Import the dll specified by the given import descriptor.
 223  * The loader_section must be locked while calling this function.
 224  */
 225 static WINE_MODREF *import_dll( HMODULE module, IMAGE_IMPORT_DESCRIPTOR *descr )
 226 {
 227     NTSTATUS status;
 228     WINE_MODREF *wmImp;
 229     HMODULE imp_mod;
 230     IMAGE_EXPORT_DIRECTORY *exports;
 231     DWORD exp_size;
 232     IMAGE_THUNK_DATA *import_list, *thunk_list;
 233     char *name = get_rva( module, descr->Name );
 234
 235     status = load_dll( name, 0, &wmImp );
 236     if (status)
 237     {
 238         WINE_MODREF *user = get_modref( module );
 239         if (status == STATUS_NO_SUCH_FILE)
 240             ERR("Module (file) %s (which is needed by %s) not found\n", name, user->filename);
 241         else
 242             ERR("Loading module (file) %s (which is needed by %s) failed (error %ld).\n",
 243                 name, user->filename, status);
 244         return NULL;
 245     }
 246
 247     imp_mod = wmImp->ldr.BaseAddress;
 248     if (!(exports = RtlImageDirectoryEntryToData( imp_mod, TRUE,
 249                                                   IMAGE_DIRECTORY_ENTRY_EXPORT, &exp_size )))
 250         return NULL;
 251
 252     thunk_list = get_rva( module, (DWORD)descr->FirstThunk );
 253     if (descr->u.OriginalFirstThunk)
 254         import_list = get_rva( module, (DWORD)descr->u.OriginalFirstThunk );
 255     else
 256         import_list = thunk_list;
 257
 258     while (import_list->u1.Ordinal)
 259     {
 260         if (IMAGE_SNAP_BY_ORDINAL(import_list->u1.Ordinal))
 261         {
 262             int ordinal = IMAGE_ORDINAL(import_list->u1.Ordinal);
 263
 264             TRACE("--- Ordinal %s,%d\n", name, ordinal);
 265             thunk_list->u1.Function = (PDWORD)find_ordinal_export( imp_mod, exports, exp_size,
 266                                                                    ordinal - exports->Base );
 267             if (!thunk_list->u1.Function)
 268             {
 269                 WINE_MODREF *user = get_modref( module );
 270                 ERR("No implementation for %s.%d imported from %s, setting to 0xdeadbeef\n",
 271                     name, ordinal, user->filename );
 272                 thunk_list->u1.Function = (PDWORD)0xdeadbeef;
 273             }
 274         }
 275         else  /* import by name */
 276         {
 277             IMAGE_IMPORT_BY_NAME *pe_name;
 278             pe_name = get_rva( module, (DWORD)import_list->u1.AddressOfData );
 279             TRACE("--- %s %s.%d\n", pe_name->Name, name, pe_name->Hint);
 280             thunk_list->u1.Function = (PDWORD)find_named_export( imp_mod, exports, exp_size,
 281                                                                  pe_name->Name, pe_name->Hint );
 282             if (!thunk_list->u1.Function)
 283             {
 284                 WINE_MODREF *user = get_modref( module );
 285                 ERR("No implementation for %s.%s imported from %s, setting to 0xdeadbeef\n",
 286                     name, pe_name->Name, user->filename );
 287                 thunk_list->u1.Function = (PDWORD)0xdeadbeef;
 288             }
 289         }
 290         import_list++;
 291         thunk_list++;
 292     }
 293     return wmImp;
 294 }
 295
 296
 297 /****************************************************************
 298  *      PE_fixup_imports
 299  *
 300  * Fixup all imports of a given module.
 301  * The loader_section must be locked while calling this function.
 302  */
 303 DWORD PE_fixup_imports( WINE_MODREF *wm )
 304 {
 305     int i, nb_imports;
 306     IMAGE_IMPORT_DESCRIPTOR *imports;
 307     DWORD size;
 308
 309     if (!(imports = RtlImageDirectoryEntryToData( wm->ldr.BaseAddress, TRUE,
 310                                                   IMAGE_DIRECTORY_ENTRY_IMPORT, &size )))
 311         return 0;
 312
 313     nb_imports = size / sizeof(*imports);
 314     for (i = 0; i < nb_imports; i++)
 315     {
 316         if (!imports[i].Name)
 317         {
 318             nb_imports = i;
 319             break;
 320         }
 321     }
 322     if (!nb_imports) return 0;  /* no imports */
 323
 324     /* Allocate module dependency list */
 325     wm->nDeps = nb_imports;
 326     wm->deps  = RtlAllocateHeap( ntdll_get_process_heap(), 0, nb_imports*sizeof(WINE_MODREF *) );
 327
 328     /* load the imported modules. They are automatically
 329      * added to the modref list of the process.
 330      */
 331     for (i = 0; i < nb_imports; i++)
 332     {
 333         if (!(wm->deps[i] = import_dll( wm->ldr.BaseAddress, &imports[i] ))) return 1;
 334     }
 335     return 0;
 336 }
 337
 338
 339 /*************************************************************************
 340  *              MODULE_AllocModRef
 341  *
 342  * Allocate a WINE_MODREF structure and add it to the process list
 343  * The loader_section must be locked while calling this function.
 344  */
 345 WINE_MODREF *MODULE_AllocModRef( HMODULE hModule, LPCSTR filename )
 346 {
 347     WINE_MODREF *wm;
 348     IMAGE_NT_HEADERS *nt = RtlImageNtHeader(hModule);
 349
 350     DWORD long_len = strlen( filename );
 351     DWORD short_len = GetShortPathNameA( filename, NULL, 0 );
 352
 353     if ((wm = RtlAllocateHeap( ntdll_get_process_heap(), HEAP_ZERO_MEMORY,
 354                                sizeof(*wm) + long_len + short_len + 1 )))
 355     {
 356         wm->filename = wm->data;
 357         memcpy( wm->filename, filename, long_len + 1 );
 358         if ((wm->modname = strrchr( wm->filename, '\\' ))) wm->modname++;
 359         else wm->modname = wm->filename;
 360
 361         wm->short_filename = wm->filename + long_len + 1;
 362         GetShortPathNameA( wm->filename, wm->short_filename, short_len + 1 );
 363         if ((wm->short_modname = strrchr( wm->short_filename, '\\' ))) wm->short_modname++;
 364         else wm->short_modname = wm->short_filename;
 365
 366         wm->next = MODULE_modref_list;
 367         if (wm->next) wm->next->prev = wm;
 368         MODULE_modref_list = wm;
 369
 370         wm->ldr.InLoadOrderModuleList.Flink = NULL;
 371         wm->ldr.InLoadOrderModuleList.Blink = NULL;
 372         wm->ldr.InMemoryOrderModuleList.Flink = NULL;
 373         wm->ldr.InMemoryOrderModuleList.Blink = NULL;
 374         wm->ldr.InInitializationOrderModuleList.Flink = NULL;
 375         wm->ldr.InInitializationOrderModuleList.Blink = NULL;
 376         wm->ldr.BaseAddress = hModule;
 377         wm->ldr.EntryPoint = (nt->OptionalHeader.AddressOfEntryPoint) ?
 378                              ((char *)hModule + nt->OptionalHeader.AddressOfEntryPoint) : 0;
 379         wm->ldr.SizeOfImage = nt->OptionalHeader.SizeOfImage;
 380         RtlCreateUnicodeStringFromAsciiz( &wm->ldr.FullDllName, wm->filename);
 381         RtlCreateUnicodeStringFromAsciiz( &wm->ldr.BaseDllName, wm->modname);
 382         wm->ldr.Flags = 0;
 383         wm->ldr.LoadCount = 0;
 384         wm->ldr.TlsIndex = -1;
 385         wm->ldr.SectionHandle = NULL;
 386         wm->ldr.CheckSum = 0;
 387         wm->ldr.TimeDateStamp = 0;
 388
 389         if (!(nt->FileHeader.Characteristics & IMAGE_FILE_DLL))
 390         {
 391             if (!exe_modref) exe_modref = wm;
 392             else FIXME( "Trying to load second .EXE file: %s\n", filename );
 393         }
 394         else wm->ldr.Flags |= LDR_IMAGE_IS_DLL;
 395     }
 396     return wm;
 397 }
 398
 399 /*************************************************************************
 400  *              MODULE_InitDLL
 401  */
 402 static BOOL MODULE_InitDLL( WINE_MODREF *wm, DWORD type, LPVOID lpReserved )
 403 {
 404     static const char * const typeName[] = { "PROCESS_DETACH", "PROCESS_ATTACH",
 405                                              "THREAD_ATTACH", "THREAD_DETACH" };
 406     BOOL retv = TRUE;
 407     DLLENTRYPROC entry = wm->ldr.EntryPoint;
 408     void *module = wm->ldr.BaseAddress;
 409
 410     /* Skip calls for modules loaded with special load flags */
 411
 412     if (wm->ldr.Flags & LDR_DONT_RESOLVE_REFS) return TRUE;
 413     if (!entry || !(wm->ldr.Flags & LDR_IMAGE_IS_DLL)) return TRUE;
 414
 415     TRACE("(%p (%s),%s,%p) - CALL\n", module, wm->modname, typeName[type], lpReserved );
 416
 417     if (TRACE_ON(relay))
 418         DPRINTF("%04lx:Call PE DLL (proc=%p,module=%p,type=%ld,res=%p)\n",
 419                 GetCurrentThreadId(), entry, module, type, lpReserved );
 420
 421     retv = entry( module, type, lpReserved );
 422
 423     if (TRACE_ON(relay))
 424         DPRINTF("%04lx:Ret  PE DLL (proc=%p,module=%p,type=%ld,res=%p) retval=%x\n",
 425                 GetCurrentThreadId(), entry, module, type, lpReserved, retv );
 426
 427     /* The state of the module list may have changed due to the call
 428        to the dll. We cannot assume that this module has not been
 429        deleted.  */
 430     TRACE("(%p,%s,%p) - RETURN %d\n", module, typeName[type], lpReserved, retv );
 431
 432     return retv;
 433 }
 434
 435
 436 /*************************************************************************
 437  *              MODULE_DllProcessAttach
 438  *
 439  * Send the process attach notification to all DLLs the given module
 440  * depends on (recursively). This is somewhat complicated due to the fact that
 441  *
 442  * - we have to respect the module dependencies, i.e. modules implicitly
 443  *   referenced by another module have to be initialized before the module
 444  *   itself can be initialized
 445  *
 446  * - the initialization routine of a DLL can itself call LoadLibrary,
 447  *   thereby introducing a whole new set of dependencies (even involving
 448  *   the 'old' modules) at any time during the whole process
 449  *
 450  * (Note that this routine can be recursively entered not only directly
 451  *  from itself, but also via LoadLibrary from one of the called initialization
 452  *  routines.)
 453  *
 454  * Furthermore, we need to rearrange the main WINE_MODREF list to allow
 455  * the process *detach* notifications to be sent in the correct order.
 456  * This must not only take into account module dependencies, but also
 457  * 'hidden' dependencies created by modules calling LoadLibrary in their
 458  * attach notification routine.
 459  *
 460  * The strategy is rather simple: we move a WINE_MODREF to the head of the
 461  * list after the attach notification has returned.  This implies that the
 462  * detach notifications are called in the reverse of the sequence the attach
 463  * notifications *returned*.
 464  */
 465 BOOL MODULE_DllProcessAttach( WINE_MODREF *wm, LPVOID lpReserved )
 466 {
 467     BOOL retv = TRUE;
 468     int i;
 469
 470     RtlEnterCriticalSection( &loader_section );
 471
 472     if (!wm)
 473     {
 474         wm = exe_modref;
 475         PE_InitTls();
 476     }
 477     assert( wm );
 478
 479     /* prevent infinite recursion in case of cyclical dependencies */
 480     if (    ( wm->ldr.Flags & LDR_LOAD_IN_PROGRESS )
 481          || ( wm->ldr.Flags & LDR_PROCESS_ATTACHED ) )
 482         goto done;
 483
 484     TRACE("(%s,%p) - START\n", wm->modname, lpReserved );
 485
 486     /* Tag current MODREF to prevent recursive loop */
 487     wm->ldr.Flags |= LDR_LOAD_IN_PROGRESS;
 488
 489     /* Recursively attach all DLLs this one depends on */
 490     for ( i = 0; retv && i < wm->nDeps; i++ )
 491         if ( wm->deps[i] )
 492             retv = MODULE_DllProcessAttach( wm->deps[i], lpReserved );
 493
 494     /* Call DLL entry point */
 495     if ( retv )
 496     {
 497         retv = MODULE_InitDLL( wm, DLL_PROCESS_ATTACH, lpReserved );
 498         if ( retv )
 499             wm->ldr.Flags |= LDR_PROCESS_ATTACHED;
 500     }
 501
 502     /* Re-insert MODREF at head of list */
 503     if ( retv && wm->prev )
 504     {
 505         wm->prev->next = wm->next;
 506         if ( wm->next ) wm->next->prev = wm->prev;
 507
 508         wm->prev = NULL;
 509         wm->next = MODULE_modref_list;
 510         MODULE_modref_list = wm->next->prev = wm;
 511     }
 512
 513     /* Remove recursion flag */
 514     wm->ldr.Flags &= ~LDR_LOAD_IN_PROGRESS;
 515
 516     TRACE("(%s,%p) - END\n", wm->modname, lpReserved );
 517
 518
 519  done:
 520     RtlLeaveCriticalSection( &loader_section );
 521     return retv;
 522 }
 523
 524 /*************************************************************************
 525  *              MODULE_DllProcessDetach
 526  *
 527  * Send DLL process detach notifications.  See the comment about calling
 528  * sequence at MODULE_DllProcessAttach.  Unless the bForceDetach flag
 529  * is set, only DLLs with zero refcount are notified.
 530  */
 531 void MODULE_DllProcessDetach( BOOL bForceDetach, LPVOID lpReserved )
 532 {
 533     WINE_MODREF *wm;
 534
 535     RtlEnterCriticalSection( &loader_section );
 536     if (bForceDetach) process_detaching = 1;
 537     do
 538     {
 539         for ( wm = MODULE_modref_list; wm; wm = wm->next )
 540         {
 541             /* Check whether to detach this DLL */
 542             if ( !(wm->ldr.Flags & LDR_PROCESS_ATTACHED) )
 543                 continue;
 544             if ( wm->ldr.LoadCount > 0 && !bForceDetach )
 545                 continue;
 546
 547             /* Call detach notification */
 548             wm->ldr.Flags &= ~LDR_PROCESS_ATTACHED;
 549             MODULE_InitDLL( wm, DLL_PROCESS_DETACH, lpReserved );
 550
 551             /* Restart at head of WINE_MODREF list, as entries might have
 552                been added and/or removed while performing the call ... */
 553             break;
 554         }
 555     } while ( wm );
 556
 557     RtlLeaveCriticalSection( &loader_section );
 558 }
 559
 560 /*************************************************************************
 561  *              MODULE_DllThreadAttach
 562  *
 563  * Send DLL thread attach notifications. These are sent in the
 564  * reverse sequence of process detach notification.
 565  *
 566  */
 567 void MODULE_DllThreadAttach( LPVOID lpReserved )
 568 {
 569     WINE_MODREF *wm;
 570
 571     /* don't do any attach calls if process is exiting */
 572     if (process_detaching) return;
 573     /* FIXME: there is still a race here */
 574
 575     RtlEnterCriticalSection( &loader_section );
 576
 577     PE_InitTls();
 578
 579     for ( wm = MODULE_modref_list; wm; wm = wm->next )
 580         if ( !wm->next )
 581             break;
 582
 583     for ( ; wm; wm = wm->prev )
 584     {
 585         if ( !(wm->ldr.Flags & LDR_PROCESS_ATTACHED) )
 586             continue;
 587         if ( wm->ldr.Flags & LDR_NO_DLL_CALLS )
 588             continue;
 589
 590         MODULE_InitDLL( wm, DLL_THREAD_ATTACH, lpReserved );
 591     }
 592
 593     RtlLeaveCriticalSection( &loader_section );
 594 }
 595
 596 /******************************************************************
 597  *              LdrDisableThreadCalloutsForDll (NTDLL.@)
 598  *
 599  */
 600 NTSTATUS WINAPI LdrDisableThreadCalloutsForDll(HMODULE hModule)
 601 {
 602     WINE_MODREF *wm;
 603     NTSTATUS    ret = STATUS_SUCCESS;
 604
 605     RtlEnterCriticalSection( &loader_section );
 606
 607     wm = get_modref( hModule );
 608     if ( !wm )
 609         ret = STATUS_DLL_NOT_FOUND;
 610     else
 611         wm->ldr.Flags |= LDR_NO_DLL_CALLS;
 612
 613     RtlLeaveCriticalSection( &loader_section );
 614
 615     return ret;
 616 }
 617
 618 /******************************************************************
 619  *              LdrFindEntryForAddress (NTDLL.@)
 620  *
 621  * The loader_section must be locked while calling this function
 622  */
 623 NTSTATUS WINAPI LdrFindEntryForAddress(const void* addr, PLDR_MODULE* mod)
 624 {
 625     WINE_MODREF*        wm;
 626
 627     for ( wm = MODULE_modref_list; wm; wm = wm->next )
 628     {
 629         if ((const void *)wm->ldr.BaseAddress <= addr &&
 630             (char *)addr < (char*)wm->ldr.BaseAddress + wm->ldr.SizeOfImage)
 631         {
 632             *mod = &wm->ldr;
 633             return STATUS_SUCCESS;
 634         }
 635     }
 636     return STATUS_NO_MORE_ENTRIES;
 637 }
 638
 639 /**********************************************************************
 640  *          MODULE_FindModule
 641  *
 642  * Find a (loaded) win32 module depending on path
 643  *      LPCSTR path: [in] pathname of module/library to be found
 644  *
 645  * The loader_section must be locked while calling this function
 646  * RETURNS
 647  *      the module handle if found
 648  *      0 if not
 649  */
 650 WINE_MODREF *MODULE_FindModule(LPCSTR path)
 651 {
 652     WINE_MODREF *wm;
 653     char dllname[260], *p;
 654
 655     /* Append .DLL to name if no extension present */
 656     strcpy( dllname, path );
 657     if (!(p = strrchr( dllname, '.')) || strchr( p, '/' ) || strchr( p, '\\'))
 658             strcat( dllname, ".DLL" );
 659
 660     if ((wm = cached_modref) != NULL)
 661     {
 662         if ( !FILE_strcasecmp( dllname, wm->modname ) ) return wm;
 663         if ( !FILE_strcasecmp( dllname, wm->filename ) ) return wm;
 664         if ( !FILE_strcasecmp( dllname, wm->short_modname ) ) return wm;
 665         if ( !FILE_strcasecmp( dllname, wm->short_filename ) ) return wm;
 666     }
 667
 668     for ( wm = MODULE_modref_list; wm; wm = wm->next )
 669     {
 670         if ( !FILE_strcasecmp( dllname, wm->modname ) ) break;
 671         if ( !FILE_strcasecmp( dllname, wm->filename ) ) break;
 672         if ( !FILE_strcasecmp( dllname, wm->short_modname ) ) break;
 673         if ( !FILE_strcasecmp( dllname, wm->short_filename ) ) break;
 674     }
 675     cached_modref = wm;
 676     return wm;
 677 }
 678
 679
 680 /******************************************************************
 681  *              LdrLockLoaderLock  (NTDLL.@)
 682  *
 683  * Note: flags are not implemented.
 684  * Flag 0x01 is used to raise exceptions on errors.
 685  * Flag 0x02 is used to avoid waiting on the section (does RtlTryEnterCriticalSection instead).
 686  */
 687 NTSTATUS WINAPI LdrLockLoaderLock( ULONG flags, ULONG *result, ULONG *magic )
 688 {
 689     if (flags) FIXME( "flags %lx not supported\n", flags );
 690
 691     if (result) *result = 1;
 692     if (!magic) return STATUS_INVALID_PARAMETER_3;
 693     RtlEnterCriticalSection( &loader_section );
 694     *magic = GetCurrentThreadId();
 695     return STATUS_SUCCESS;
 696 }
 697
 698
 699 /******************************************************************
 700  *              LdrUnlockLoaderUnlock  (NTDLL.@)
 701  */
 702 NTSTATUS WINAPI LdrUnlockLoaderLock( ULONG flags, ULONG magic )
 703 {
 704     if (magic)
 705     {
 706         if (magic != GetCurrentThreadId()) return STATUS_INVALID_PARAMETER_2;
 707         RtlLeaveCriticalSection( &loader_section );
 708     }
 709     return STATUS_SUCCESS;
 710 }
 711
 712
 713 /******************************************************************
 714  *              LdrGetDllHandle (NTDLL.@)
 715  *
 716  *
 717  */
 718 NTSTATUS WINAPI LdrGetDllHandle(ULONG x, ULONG y, PUNICODE_STRING name, HMODULE *base)
 719 {
 720     WINE_MODREF *wm;
 721     STRING str;
 722
 723     if (x != 0 || y != 0)
 724         FIXME("Unknown behavior, please report\n");
 725
 726     /* FIXME: we should store module name information as unicode */
 727     RtlUnicodeStringToAnsiString( &str, name, TRUE );
 728     wm = MODULE_FindModule( str.Buffer );
 729     RtlFreeAnsiString( &str );
 730
 731     if (!wm)
 732     {
 733         *base = 0;
 734         return STATUS_DLL_NOT_FOUND;
 735     }
 736
 737     *base = wm->ldr.BaseAddress;
 738
 739     TRACE("%lx %lx %s -> %p\n", x, y, debugstr_us(name), *base);
 740
 741     return STATUS_SUCCESS;
 742 }
 743
 744
 745 /******************************************************************
 746  *              LdrGetProcedureAddress  (NTDLL.@)
 747  */
 748 NTSTATUS WINAPI LdrGetProcedureAddress(HMODULE module, PANSI_STRING name, ULONG ord, PVOID *address)
 749 {
 750     IMAGE_EXPORT_DIRECTORY *exports;
 751     DWORD exp_size;
 752     NTSTATUS ret = STATUS_PROCEDURE_NOT_FOUND;
 753
 754     RtlEnterCriticalSection( &loader_section );
 755
 756     if ((exports = RtlImageDirectoryEntryToData( module, TRUE,
 757                                                  IMAGE_DIRECTORY_ENTRY_EXPORT, &exp_size )))
 758     {
 759         void *proc = name ? find_named_export( module, exports, exp_size, name->Buffer, -1 )
 760                           : find_ordinal_export( module, exports, exp_size, ord - exports->Base );
 761         if (proc)
 762         {
 763             *address = proc;
 764             ret = STATUS_SUCCESS;
 765         }
 766     }
 767     else
 768     {
 769         /* check if the module itself is invalid to return the proper error */
 770         if (!get_modref( module )) ret = STATUS_DLL_NOT_FOUND;
 771     }
 772
 773     RtlLeaveCriticalSection( &loader_section );
 774     return ret;
 775 }
 776
 777
 778 /***********************************************************************
 779  *      allocate_lib_dir
 780  *
 781  * helper for MODULE_LoadLibraryExA.  Allocate space to hold the directory
 782  * portion of the provided name and put the name in it.
 783  *
 784  */
 785 static LPCSTR allocate_lib_dir(LPCSTR libname)
 786 {
 787     LPCSTR p, pmax;
 788     LPSTR result;
 789     int length;
 790
 791     pmax = libname;
 792     if ((p = strrchr( pmax, '\\' ))) pmax = p + 1;
 793     if ((p = strrchr( pmax, '/' ))) pmax = p + 1; /* Naughty.  MSDN says don't */
 794     if (pmax == libname && pmax[0] && pmax[1] == ':') pmax += 2;
 795
 796     length = pmax - libname;
 797
 798     result = RtlAllocateHeap (ntdll_get_process_heap(), 0, length+1);
 799
 800     if (result)
 801     {
 802         strncpy (result, libname, length);
 803         result [length] = '\0';
 804     }
 805
 806     return result;
 807 }
 808
 809 /***********************************************************************
 810  *      load_dll  (internal)
 811  *
 812  * Load a PE style module according to the load order.
 813  *
 814  * libdir is used to support LOAD_WITH_ALTERED_SEARCH_PATH during the recursion
 815  *        on this function.  When first called from LoadLibraryExA it will be
 816  *        NULL but thereafter it may point to a buffer containing the path
 817  *        portion of the library name.  Note that the recursion all occurs
 818  *        within a Critical section (see LoadLibraryExA) so the use of a
 819  *        static is acceptable.
 820  *        (We have to use a static variable at some point anyway, to pass the
 821  *        information from BUILTIN32_dlopen through dlopen and the builtin's
 822  *        init function into load_library).
 823  * allocated_libdir is TRUE in the stack frame that allocated libdir
 824  */
 825 static NTSTATUS load_dll( LPCSTR libname, DWORD flags, WINE_MODREF** pwm )
 826 {
 827     int i;
 828     enum loadorder_type loadorder[LOADORDER_NTYPES];
 829     LPSTR filename;
 830     const char *filetype = "";
 831     DWORD found;
 832     BOOL allocated_libdir = FALSE;
 833     static LPCSTR libdir = NULL; /* See above */
 834     NTSTATUS nts = STATUS_SUCCESS;
 835
 836     *pwm = NULL;
 837     if ( !libname ) return STATUS_DLL_NOT_FOUND; /* FIXME ? */
 838
 839     filename = RtlAllocateHeap ( ntdll_get_process_heap(), 0, MAX_PATH + 1 );
 840     if ( !filename ) return STATUS_NO_MEMORY;
 841     *filename = 0; /* Just in case we don't set it before goto error */
 842
 843     RtlEnterCriticalSection( &loader_section );
 844
 845     if ((flags & LOAD_WITH_ALTERED_SEARCH_PATH) && FILE_contains_path(libname))
 846     {
 847         if (!(libdir = allocate_lib_dir(libname)))
 848         {
 849             nts = STATUS_NO_MEMORY;
 850             goto error;
 851         }
 852         allocated_libdir = TRUE;
 853     }
 854
 855     if (!libdir || allocated_libdir)
 856         found = SearchPathA(NULL, libname, ".dll", MAX_PATH, filename, NULL);
 857     else
 858         found = DIR_SearchAlternatePath(libdir, libname, ".dll", MAX_PATH, filename, NULL);
 859
 860     /* build the modules filename */
 861     if (!found)
 862     {
 863         if (!MODULE_GetBuiltinPath( libname, ".dll", filename, MAX_PATH ))
 864         {
 865             nts = STATUS_INTERNAL_ERROR;
 866             goto error;
 867         }
 868     }
 869
 870     /* Check for already loaded module */
 871     if (!(*pwm = MODULE_FindModule(filename)) && !FILE_contains_path(libname))
 872     {
 873         LPSTR   fn = RtlAllocateHeap ( ntdll_get_process_heap(), 0, MAX_PATH + 1 );
 874         if (fn)
 875         {
 876             /* since the default loading mechanism uses a more detailed algorithm
 877              * than SearchPath (like using PATH, which can even be modified between
 878              * two attempts of loading the same DLL), the look-up above (with
 879              * SearchPath) can have put the file in system directory, whereas it
 880              * has already been loaded but with a different path. So do a specific
 881              * look-up with filename (without any path)
 882              */
 883             strcpy ( fn, libname );
 884             /* if the filename doesn't have an extension append .DLL */
 885             if (!strrchr( fn, '.')) strcat( fn, ".dll" );
 886             if ((*pwm = MODULE_FindModule( fn )) != NULL)
 887                 strcpy( filename, fn );
 888             RtlFreeHeap( ntdll_get_process_heap(), 0, fn );
 889         }
 890     }
 891     if (*pwm)
 892     {
 893         (*pwm)->ldr.LoadCount++;
 894
 895         if (((*pwm)->ldr.Flags & LDR_DONT_RESOLVE_REFS) &&
 896             !(flags & DONT_RESOLVE_DLL_REFERENCES))
 897         {
 898             (*pwm)->ldr.Flags &= ~LDR_DONT_RESOLVE_REFS;
 899             PE_fixup_imports( *pwm );
 900         }
 901         TRACE("Already loaded module '%s' at %p, count=%d\n", filename, (*pwm)->ldr.BaseAddress, (*pwm)->ldr.LoadCount);
 902         if (allocated_libdir)
 903         {
 904             RtlFreeHeap( ntdll_get_process_heap(), 0, (LPSTR)libdir );
 905             libdir = NULL;
 906         }
 907         RtlLeaveCriticalSection( &loader_section );
 908         RtlFreeHeap( ntdll_get_process_heap(), 0, filename );
 909         return STATUS_SUCCESS;
 910     }
 911
 912     MODULE_GetLoadOrder( loadorder, filename, TRUE);
 913
 914     for (i = 0; i < LOADORDER_NTYPES; i++)
 915     {
 916         if (loadorder[i] == LOADORDER_INVALID) break;
 917
 918         switch (loadorder[i])
 919         {
 920         case LOADORDER_DLL:
 921             TRACE("Trying native dll '%s'\n", filename);
 922             nts = PE_LoadLibraryExA(filename, flags, pwm);
 923             filetype = "native";
 924             break;
 925
 926         case LOADORDER_BI:
 927             TRACE("Trying built-in '%s'\n", filename);
 928             nts = BUILTIN32_LoadLibraryExA(filename, flags, pwm);
 929             filetype = "builtin";
 930             break;
 931
 932         default:
 933             nts = STATUS_INTERNAL_ERROR;
 934             break;
 935         }
 936
 937         if (nts == STATUS_SUCCESS)
 938         {
 939             /* Initialize DLL just loaded */
 940             TRACE("Loaded module '%s' (%s) at %p\n", filename, filetype, (*pwm)->ldr.BaseAddress);
 941             if (!TRACE_ON(module))
 942                 TRACE_(loaddll)("Loaded module '%s' : %s\n", filename, filetype);
 943             /* Set the ldr.LoadCount here so that an attach failure will */
 944             /* decrement the dependencies through the MODULE_FreeLibrary call. */
 945             (*pwm)->ldr.LoadCount = 1;
 946
 947             if (allocated_libdir)
 948             {
 949                 RtlFreeHeap( ntdll_get_process_heap(), 0, (LPSTR)libdir );
 950                 libdir = NULL;
 951             }
 952             RtlLeaveCriticalSection( &loader_section );
 953             RtlFreeHeap( ntdll_get_process_heap(), 0, filename );
 954             return nts;
 955         }
 956
 957         if (nts != STATUS_NO_SUCH_FILE)
 958         {
 959             WARN("Loading of %s DLL %s failed (status %ld).\n",
 960                  filetype, filename, nts);
 961             break;
 962         }
 963     }
 964
 965  error:
 966     if (allocated_libdir)
 967     {
 968         RtlFreeHeap( ntdll_get_process_heap(), 0, (LPSTR)libdir );
 969         libdir = NULL;
 970     }
 971     RtlLeaveCriticalSection( &loader_section );
 972     WARN("Failed to load module '%s'; status=%ld\n", filename, nts);
 973     RtlFreeHeap( ntdll_get_process_heap(), 0, filename );
 974     return nts;
 975 }
 976
 977 /******************************************************************
 978  *              LdrLoadDll (NTDLL.@)
 979  */
 980 NTSTATUS WINAPI LdrLoadDll(LPCWSTR path_name, DWORD flags, PUNICODE_STRING libname, HMODULE* hModule)
 981 {
 982     WINE_MODREF *wm;
 983     NTSTATUS    nts = STATUS_SUCCESS;
 984     STRING      str;
 985
 986     RtlUnicodeStringToAnsiString(&str, libname, TRUE);
 987
 988     RtlEnterCriticalSection( &loader_section );
 989
 990     switch (nts = load_dll( str.Buffer, flags, &wm ))
 991     {
 992     case STATUS_SUCCESS:
 993         if ( !MODULE_DllProcessAttach( wm, NULL ) )
 994         {
 995             WARN("Attach failed for module '%s'.\n", str.Buffer);
 996             LdrUnloadDll(wm->ldr.BaseAddress);
 997             nts = STATUS_DLL_INIT_FAILED;
 998             wm = NULL;
 999         }
1000         break;
1001     case STATUS_NO_SUCH_FILE:
1002         nts = STATUS_DLL_NOT_FOUND;
1003         break;
1004     default: /* keep error code as it is (memory...) */
1005         break;
1006     }
1007
1008     *hModule = (wm) ? wm->ldr.BaseAddress : NULL;
1009
1010     RtlLeaveCriticalSection( &loader_section );
1011
1012     RtlFreeAnsiString(&str);
1013
1014     return nts;
1015 }
1016
1017 /******************************************************************
1018  *              LdrQueryProcessModuleInformation
1019  *
1020  */
1021 NTSTATUS WINAPI LdrQueryProcessModuleInformation(PSYSTEM_MODULE_INFORMATION smi,
1022                                                  ULONG buf_size, ULONG* req_size)
1023 {
1024     SYSTEM_MODULE*      sm = &smi->Modules[0];
1025     ULONG               size = sizeof(ULONG);
1026     NTSTATUS            nts = STATUS_SUCCESS;
1027     ANSI_STRING         str;
1028     char*               ptr;
1029     WINE_MODREF*        wm;
1030
1031     smi->ModulesCount = 0;
1032
1033     RtlEnterCriticalSection( &loader_section );
1034     for ( wm = MODULE_modref_list; wm; wm = wm->next )
1035     {
1036         size += sizeof(*sm);
1037         if (size <= buf_size)
1038         {
1039             sm->Reserved1 = 0; /* FIXME */
1040             sm->Reserved2 = 0; /* FIXME */
1041             sm->ImageBaseAddress = wm->ldr.BaseAddress;
1042             sm->ImageSize = wm->ldr.SizeOfImage;
1043             sm->Flags = wm->ldr.Flags;
1044             sm->Id = 0; /* FIXME */
1045             sm->Rank = 0; /* FIXME */
1046             sm->Unknown = 0; /* FIXME */
1047             str.Length = 0;
1048             str.MaximumLength = MAXIMUM_FILENAME_LENGTH;
1049             str.Buffer = sm->Name;
1050             RtlUnicodeStringToAnsiString(&str, &wm->ldr.FullDllName, FALSE);
1051             ptr = strrchr(sm->Name, '\\');
1052             sm->NameOffset = (ptr != NULL) ? (ptr - (char*)sm->Name + 1) : 0;
1053
1054             smi->ModulesCount++;
1055             sm++;
1056         }
1057         else nts = STATUS_INFO_LENGTH_MISMATCH;
1058     }
1059     RtlLeaveCriticalSection( &loader_section );
1060
1061     if (req_size) *req_size = size;
1062
1063     return nts;
1064 }
1065
1066 /******************************************************************
1067  *              LdrShutdownProcess (NTDLL.@)
1068  *
1069  */
1070 NTSTATUS    WINAPI  LdrShutdownProcess(void)
1071 {
1072     TRACE("()\n");
1073     MODULE_DllProcessDetach( TRUE, (LPVOID)1 );
1074     return STATUS_SUCCESS; /* FIXME */
1075 }
1076
1077 /******************************************************************
1078  *              LdrShutdownThread (NTDLL.@)
1079  *
1080  */
1081 NTSTATUS WINAPI LdrShutdownThread(void)
1082 {
1083     WINE_MODREF *wm;
1084     TRACE("()\n");
1085
1086     /* don't do any detach calls if process is exiting */
1087     if (process_detaching) return STATUS_SUCCESS;
1088     /* FIXME: there is still a race here */
1089
1090     RtlEnterCriticalSection( &loader_section );
1091
1092     for ( wm = MODULE_modref_list; wm; wm = wm->next )
1093     {
1094         if ( !(wm->ldr.Flags & LDR_PROCESS_ATTACHED) )
1095             continue;
1096         if ( wm->ldr.Flags & LDR_NO_DLL_CALLS )
1097             continue;
1098
1099         MODULE_InitDLL( wm, DLL_THREAD_DETACH, NULL );
1100     }
1101
1102     RtlLeaveCriticalSection( &loader_section );
1103     return STATUS_SUCCESS; /* FIXME */
1104 }
1105
1106 /***********************************************************************
1107  *           MODULE_FlushModrefs
1108  *
1109  * Remove all unused modrefs and call the internal unloading routines
1110  * for the library type.
1111  *
1112  * The loader_section must be locked while calling this function.
1113  */
1114 static void MODULE_FlushModrefs(void)
1115 {
1116     WINE_MODREF *wm, *next;
1117
1118     for (wm = MODULE_modref_list; wm; wm = next)
1119     {
1120         next = wm->next;
1121
1122         if (wm->ldr.LoadCount)
1123             continue;
1124
1125         /* Unlink this modref from the chain */
1126         if (wm->next)
1127             wm->next->prev = wm->prev;
1128         if (wm->prev)
1129             wm->prev->next = wm->next;
1130         if (wm == MODULE_modref_list)
1131             MODULE_modref_list = wm->next;
1132
1133         TRACE(" unloading %s\n", wm->filename);
1134         if (!TRACE_ON(module))
1135             TRACE_(loaddll)("Unloaded module '%s' : %s\n", wm->filename,
1136                             wm->dlhandle ? "builtin" : "native" );
1137
1138         SERVER_START_REQ( unload_dll )
1139         {
1140             req->base = wm->ldr.BaseAddress;
1141             wine_server_call( req );
1142         }
1143         SERVER_END_REQ;
1144
1145         if (wm->dlhandle) wine_dll_unload( wm->dlhandle );
1146         else NtUnmapViewOfSection( GetCurrentProcess(), wm->ldr.BaseAddress );
1147         FreeLibrary16( wm->hDummyMod );
1148         if (cached_modref == wm) cached_modref = NULL;
1149         RtlFreeHeap( ntdll_get_process_heap(), 0, wm->deps );
1150         RtlFreeHeap( ntdll_get_process_heap(), 0, wm );
1151     }
1152 }
1153
1154 /***********************************************************************
1155  *           MODULE_DecRefCount
1156  *
1157  * The loader_section must be locked while calling this function.
1158  */
1159 static void MODULE_DecRefCount( WINE_MODREF *wm )
1160 {
1161     int i;
1162
1163     if ( wm->ldr.Flags & LDR_UNLOAD_IN_PROGRESS )
1164         return;
1165
1166     if ( wm->ldr.LoadCount <= 0 )
1167         return;
1168
1169     --wm->ldr.LoadCount;
1170     TRACE("(%s) ldr.LoadCount: %d\n", wm->modname, wm->ldr.LoadCount );
1171
1172     if ( wm->ldr.LoadCount == 0 )
1173     {
1174         wm->ldr.Flags |= LDR_UNLOAD_IN_PROGRESS;
1175
1176         for ( i = 0; i < wm->nDeps; i++ )
1177             if ( wm->deps[i] )
1178                 MODULE_DecRefCount( wm->deps[i] );
1179
1180         wm->ldr.Flags &= ~LDR_UNLOAD_IN_PROGRESS;
1181     }
1182 }
1183
1184 /******************************************************************
1185  *              LdrUnloadDll (NTDLL.@)
1186  *
1187  *
1188  */
1189 NTSTATUS WINAPI LdrUnloadDll( HMODULE hModule )
1190 {
1191     NTSTATUS retv = STATUS_SUCCESS;
1192
1193     TRACE("(%p)\n", hModule);
1194
1195     RtlEnterCriticalSection( &loader_section );
1196
1197     /* if we're stopping the whole process (and forcing the removal of all
1198      * DLLs) the library will be freed anyway
1199      */
1200     if (!process_detaching)
1201     {
1202         WINE_MODREF *wm;
1203
1204         free_lib_count++;
1205         if ((wm = get_modref( hModule )) != NULL)
1206         {
1207             TRACE("(%s) - START\n", wm->modname);
1208
1209             /* Recursively decrement reference counts */
1210             MODULE_DecRefCount( wm );
1211
1212             /* Call process detach notifications */
1213             if ( free_lib_count <= 1 )
1214             {
1215                 MODULE_DllProcessDetach( FALSE, NULL );
1216                 MODULE_FlushModrefs();
1217             }
1218
1219             TRACE("END\n");
1220         }
1221         else
1222             retv = STATUS_DLL_NOT_FOUND;
1223
1224         free_lib_count--;
1225     }
1226
1227     RtlLeaveCriticalSection( &loader_section );
1228
1229     return retv;
1230 }
1231
1232 /***********************************************************************
1233  *           RtlImageNtHeader   (NTDLL.@)
1234  */
1235 PIMAGE_NT_HEADERS WINAPI RtlImageNtHeader(HMODULE hModule)
1236 {
1237     IMAGE_NT_HEADERS *ret;
1238
1239     __TRY
1240     {
1241         IMAGE_DOS_HEADER *dos = (IMAGE_DOS_HEADER *)hModule;
1242
1243         ret = NULL;
1244         if (dos->e_magic == IMAGE_DOS_SIGNATURE)
1245         {
1246             ret = (IMAGE_NT_HEADERS *)((char *)dos + dos->e_lfanew);
1247             if (ret->Signature != IMAGE_NT_SIGNATURE) ret = NULL;
1248         }
1249     }
1250     __EXCEPT(page_fault)
1251     {
1252         return NULL;
1253     }
1254     __ENDTRY
1255     return ret;
1256 }
1257
1258
1259 /***********************************************************************
1260  *           RtlImageDirectoryEntryToData   (NTDLL.@)
1261  */
1262 PVOID WINAPI RtlImageDirectoryEntryToData( HMODULE module, BOOL image, WORD dir, ULONG *size )
1263 {
1264     const IMAGE_NT_HEADERS *nt;
1265     DWORD addr;
1266
1267     if ((ULONG_PTR)module & 1)  /* mapped as data file */
1268     {
1269         module = (HMODULE)((ULONG_PTR)module & ~1);
1270         image = FALSE;
1271     }
1272     if (!(nt = RtlImageNtHeader( module ))) return NULL;
1273     if (dir >= nt->OptionalHeader.NumberOfRvaAndSizes) return NULL;
1274     if (!(addr = nt->OptionalHeader.DataDirectory[dir].VirtualAddress)) return NULL;
1275     *size = nt->OptionalHeader.DataDirectory[dir].Size;
1276     if (image || addr < nt->OptionalHeader.SizeOfHeaders) return (char *)module + addr;
1277
1278     /* not mapped as image, need to find the section containing the virtual address */
1279     return RtlImageRvaToVa( nt, module, addr, NULL );
1280 }
1281
1282
1283 /***********************************************************************
1284  *           RtlImageRvaToSection   (NTDLL.@)
1285  */
1286 PIMAGE_SECTION_HEADER WINAPI RtlImageRvaToSection( const IMAGE_NT_HEADERS *nt,
1287                                                    HMODULE module, DWORD rva )
1288 {
1289     int i;
1290     IMAGE_SECTION_HEADER *sec = (IMAGE_SECTION_HEADER*)((char*)&nt->OptionalHeader +
1291                                                         nt->FileHeader.SizeOfOptionalHeader);
1292     for (i = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
1293     {
1294         if ((sec->VirtualAddress <= rva) && (sec->VirtualAddress + sec->SizeOfRawData > rva))
1295             return sec;
1296     }
1297     return NULL;
1298 }
1299
1300
1301 /***********************************************************************
1302  *           RtlImageRvaToVa   (NTDLL.@)
1303  */
1304 PVOID WINAPI RtlImageRvaToVa( const IMAGE_NT_HEADERS *nt, HMODULE module,
1305                               DWORD rva, IMAGE_SECTION_HEADER **section )
1306 {
1307     IMAGE_SECTION_HEADER *sec;
1308
1309     if (section && *section)  /* try this section first */
1310     {
1311         sec = *section;
1312         if ((sec->VirtualAddress <= rva) && (sec->VirtualAddress + sec->SizeOfRawData > rva))
1313             goto found;
1314     }
1315     if (!(sec = RtlImageRvaToSection( nt, module, rva ))) return NULL;
1316  found:
1317     if (section) *section = sec;
1318     return (char *)module + sec->PointerToRawData + (rva - sec->VirtualAddress);
1319 }