loader/module.c

   1 /*
   2  * Modules
   3  *
   4  * Copyright 1995 Alexandre Julliard
   5  */
   6
   7 #include <assert.h>
   8 #include <fcntl.h>
   9 #include <stdlib.h>
  10 #include <stdio.h>
  11 #include <string.h>
  12 #include <sys/types.h>
  13 #include <unistd.h>
  14 #include "wine/winbase16.h"
  15 #include "winerror.h"
  16 #include "heap.h"
  17 #include "file.h"
  18 #include "module.h"
  19 #include "debugtools.h"
  20 #include "wine/server.h"
  21
  22 DEFAULT_DEBUG_CHANNEL(module);
  23 DECLARE_DEBUG_CHANNEL(win32);
  24 DECLARE_DEBUG_CHANNEL(loaddll);
  25
  26 WINE_MODREF *MODULE_modref_list = NULL;
  27
  28 static WINE_MODREF *exe_modref;
  29 static int free_lib_count;   /* recursion depth of FreeLibrary calls */
  30 static int process_detaching;  /* set on process detach to avoid deadlocks with thread detach */
  31
  32 /***********************************************************************
  33  *           wait_input_idle
  34  *
  35  * Wrapper to call WaitForInputIdle USER function
  36  */
  37 typedef DWORD (WINAPI *WaitForInputIdle_ptr)( HANDLE hProcess, DWORD dwTimeOut );
  38
  39 static DWORD wait_input_idle( HANDLE process, DWORD timeout )
  40 {
  41     HMODULE mod = GetModuleHandleA( "user32.dll" );
  42     if (mod)
  43     {
  44         WaitForInputIdle_ptr ptr = (WaitForInputIdle_ptr)GetProcAddress( mod, "WaitForInputIdle" );
  45         if (ptr) return ptr( process, timeout );
  46     }
  47     return 0;
  48 }
  49
  50
  51 /*************************************************************************
  52  *              MODULE32_LookupHMODULE
  53  * looks for the referenced HMODULE in the current process
  54  * NOTE: Assumes that the process critical section is held!
  55  */
  56 static WINE_MODREF *MODULE32_LookupHMODULE( HMODULE hmod )
  57 {
  58     WINE_MODREF *wm;
  59
  60     if (!hmod)
  61         return exe_modref;
  62
  63     if (!HIWORD(hmod)) {
  64         ERR("tried to lookup 0x%04x in win32 module handler!\n",hmod);
  65         SetLastError( ERROR_INVALID_HANDLE );
  66         return NULL;
  67     }
  68     for ( wm = MODULE_modref_list; wm; wm=wm->next )
  69         if (wm->module == hmod)
  70             return wm;
  71     SetLastError( ERROR_INVALID_HANDLE );
  72     return NULL;
  73 }
  74
  75 /*************************************************************************
  76  *              MODULE_AllocModRef
  77  *
  78  * Allocate a WINE_MODREF structure and add it to the process list
  79  * NOTE: Assumes that the process critical section is held!
  80  */
  81 WINE_MODREF *MODULE_AllocModRef( HMODULE hModule, LPCSTR filename )
  82 {
  83     WINE_MODREF *wm;
  84
  85     DWORD long_len = strlen( filename );
  86     DWORD short_len = GetShortPathNameA( filename, NULL, 0 );
  87
  88     if ((wm = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY,
  89                          sizeof(*wm) + long_len + short_len + 1 )))
  90     {
  91         wm->module = hModule;
  92         wm->tlsindex = -1;
  93
  94         wm->filename = wm->data;
  95         memcpy( wm->filename, filename, long_len + 1 );
  96         if ((wm->modname = strrchr( wm->filename, '\\' ))) wm->modname++;
  97         else wm->modname = wm->filename;
  98
  99         wm->short_filename = wm->filename + long_len + 1;
 100         GetShortPathNameA( wm->filename, wm->short_filename, short_len + 1 );
 101         if ((wm->short_modname = strrchr( wm->short_filename, '\\' ))) wm->short_modname++;
 102         else wm->short_modname = wm->short_filename;
 103
 104         wm->next = MODULE_modref_list;
 105         if (wm->next) wm->next->prev = wm;
 106         MODULE_modref_list = wm;
 107
 108         if (!(PE_HEADER(hModule)->FileHeader.Characteristics & IMAGE_FILE_DLL))
 109         {
 110             if (!exe_modref) exe_modref = wm;
 111             else FIXME( "Trying to load second .EXE file: %s\n", filename );
 112         }
 113     }
 114     return wm;
 115 }
 116
 117 /*************************************************************************
 118  *              MODULE_InitDLL
 119  */
 120 static BOOL MODULE_InitDLL( WINE_MODREF *wm, DWORD type, LPVOID lpReserved )
 121 {
 122     BOOL retv = TRUE;
 123
 124     static LPCSTR typeName[] = { "PROCESS_DETACH", "PROCESS_ATTACH",
 125                                  "THREAD_ATTACH", "THREAD_DETACH" };
 126     assert( wm );
 127
 128     /* Skip calls for modules loaded with special load flags */
 129
 130     if (wm->flags & WINE_MODREF_DONT_RESOLVE_REFS) return TRUE;
 131
 132     TRACE("(%s,%s,%p) - CALL\n", wm->modname, typeName[type], lpReserved );
 133
 134     /* Call the initialization routine */
 135     retv = PE_InitDLL( wm->module, type, lpReserved );
 136
 137     /* The state of the module list may have changed due to the call
 138        to PE_InitDLL. We cannot assume that this module has not been
 139        deleted.  */
 140     TRACE("(%p,%s,%p) - RETURN %d\n", wm, typeName[type], lpReserved, retv );
 141
 142     return retv;
 143 }
 144
 145 /*************************************************************************
 146  *              MODULE_DllProcessAttach
 147  *
 148  * Send the process attach notification to all DLLs the given module
 149  * depends on (recursively). This is somewhat complicated due to the fact that
 150  *
 151  * - we have to respect the module dependencies, i.e. modules implicitly
 152  *   referenced by another module have to be initialized before the module
 153  *   itself can be initialized
 154  *
 155  * - the initialization routine of a DLL can itself call LoadLibrary,
 156  *   thereby introducing a whole new set of dependencies (even involving
 157  *   the 'old' modules) at any time during the whole process
 158  *
 159  * (Note that this routine can be recursively entered not only directly
 160  *  from itself, but also via LoadLibrary from one of the called initialization
 161  *  routines.)
 162  *
 163  * Furthermore, we need to rearrange the main WINE_MODREF list to allow
 164  * the process *detach* notifications to be sent in the correct order.
 165  * This must not only take into account module dependencies, but also
 166  * 'hidden' dependencies created by modules calling LoadLibrary in their
 167  * attach notification routine.
 168  *
 169  * The strategy is rather simple: we move a WINE_MODREF to the head of the
 170  * list after the attach notification has returned.  This implies that the
 171  * detach notifications are called in the reverse of the sequence the attach
 172  * notifications *returned*.
 173  */
 174 BOOL MODULE_DllProcessAttach( WINE_MODREF *wm, LPVOID lpReserved )
 175 {
 176     BOOL retv = TRUE;
 177     int i;
 178
 179     RtlAcquirePebLock();
 180
 181     if (!wm) wm = exe_modref;
 182     assert( wm );
 183
 184     /* prevent infinite recursion in case of cyclical dependencies */
 185     if (    ( wm->flags & WINE_MODREF_MARKER )
 186          || ( wm->flags & WINE_MODREF_PROCESS_ATTACHED ) )
 187         goto done;
 188
 189     TRACE("(%s,%p) - START\n", wm->modname, lpReserved );
 190
 191     /* Tag current MODREF to prevent recursive loop */
 192     wm->flags |= WINE_MODREF_MARKER;
 193
 194     /* Recursively attach all DLLs this one depends on */
 195     for ( i = 0; retv && i < wm->nDeps; i++ )
 196         if ( wm->deps[i] )
 197             retv = MODULE_DllProcessAttach( wm->deps[i], lpReserved );
 198
 199     /* Call DLL entry point */
 200     if ( retv )
 201     {
 202         retv = MODULE_InitDLL( wm, DLL_PROCESS_ATTACH, lpReserved );
 203         if ( retv )
 204             wm->flags |= WINE_MODREF_PROCESS_ATTACHED;
 205     }
 206
 207     /* Re-insert MODREF at head of list */
 208     if ( retv && wm->prev )
 209     {
 210         wm->prev->next = wm->next;
 211         if ( wm->next ) wm->next->prev = wm->prev;
 212
 213         wm->prev = NULL;
 214         wm->next = MODULE_modref_list;
 215         MODULE_modref_list = wm->next->prev = wm;
 216     }
 217
 218     /* Remove recursion flag */
 219     wm->flags &= ~WINE_MODREF_MARKER;
 220
 221     TRACE("(%s,%p) - END\n", wm->modname, lpReserved );
 222
 223  done:
 224     RtlReleasePebLock();
 225     return retv;
 226 }
 227
 228 /*************************************************************************
 229  *              MODULE_DllProcessDetach
 230  *
 231  * Send DLL process detach notifications.  See the comment about calling
 232  * sequence at MODULE_DllProcessAttach.  Unless the bForceDetach flag
 233  * is set, only DLLs with zero refcount are notified.
 234  */
 235 void MODULE_DllProcessDetach( BOOL bForceDetach, LPVOID lpReserved )
 236 {
 237     WINE_MODREF *wm;
 238
 239     RtlAcquirePebLock();
 240     if (bForceDetach) process_detaching = 1;
 241     do
 242     {
 243         for ( wm = MODULE_modref_list; wm; wm = wm->next )
 244         {
 245             /* Check whether to detach this DLL */
 246             if ( !(wm->flags & WINE_MODREF_PROCESS_ATTACHED) )
 247                 continue;
 248             if ( wm->refCount > 0 && !bForceDetach )
 249                 continue;
 250
 251             /* Call detach notification */
 252             wm->flags &= ~WINE_MODREF_PROCESS_ATTACHED;
 253             MODULE_InitDLL( wm, DLL_PROCESS_DETACH, lpReserved );
 254
 255             /* Restart at head of WINE_MODREF list, as entries might have
 256                been added and/or removed while performing the call ... */
 257             break;
 258         }
 259     } while ( wm );
 260
 261     RtlReleasePebLock();
 262 }
 263
 264 /*************************************************************************
 265  *              MODULE_DllThreadAttach
 266  *
 267  * Send DLL thread attach notifications. These are sent in the
 268  * reverse sequence of process detach notification.
 269  *
 270  */
 271 void MODULE_DllThreadAttach( LPVOID lpReserved )
 272 {
 273     WINE_MODREF *wm;
 274
 275     /* don't do any attach calls if process is exiting */
 276     if (process_detaching) return;
 277     /* FIXME: there is still a race here */
 278
 279     RtlAcquirePebLock();
 280
 281     for ( wm = MODULE_modref_list; wm; wm = wm->next )
 282         if ( !wm->next )
 283             break;
 284
 285     for ( ; wm; wm = wm->prev )
 286     {
 287         if ( !(wm->flags & WINE_MODREF_PROCESS_ATTACHED) )
 288             continue;
 289         if ( wm->flags & WINE_MODREF_NO_DLL_CALLS )
 290             continue;
 291
 292         MODULE_InitDLL( wm, DLL_THREAD_ATTACH, lpReserved );
 293     }
 294
 295     RtlReleasePebLock();
 296 }
 297
 298 /*************************************************************************
 299  *              MODULE_DllThreadDetach
 300  *
 301  * Send DLL thread detach notifications. These are sent in the
 302  * same sequence as process detach notification.
 303  *
 304  */
 305 void MODULE_DllThreadDetach( LPVOID lpReserved )
 306 {
 307     WINE_MODREF *wm;
 308
 309     /* don't do any detach calls if process is exiting */
 310     if (process_detaching) return;
 311     /* FIXME: there is still a race here */
 312
 313     RtlAcquirePebLock();
 314
 315     for ( wm = MODULE_modref_list; wm; wm = wm->next )
 316     {
 317         if ( !(wm->flags & WINE_MODREF_PROCESS_ATTACHED) )
 318             continue;
 319         if ( wm->flags & WINE_MODREF_NO_DLL_CALLS )
 320             continue;
 321
 322         MODULE_InitDLL( wm, DLL_THREAD_DETACH, lpReserved );
 323     }
 324
 325     RtlReleasePebLock();
 326 }
 327
 328 /****************************************************************************
 329  *              DisableThreadLibraryCalls (KERNEL32.@)
 330  *
 331  * Don't call DllEntryPoint for DLL_THREAD_{ATTACH,DETACH} if set.
 332  */
 333 BOOL WINAPI DisableThreadLibraryCalls( HMODULE hModule )
 334 {
 335     WINE_MODREF *wm;
 336     BOOL retval = TRUE;
 337
 338     RtlAcquirePebLock();
 339
 340     wm = MODULE32_LookupHMODULE( hModule );
 341     if ( !wm )
 342         retval = FALSE;
 343     else
 344         wm->flags |= WINE_MODREF_NO_DLL_CALLS;
 345
 346     RtlReleasePebLock();
 347
 348     return retval;
 349 }
 350
 351
 352 /***********************************************************************
 353  *           MODULE_CreateDummyModule
 354  *
 355  * Create a dummy NE module for Win32 or Winelib.
 356  */
 357 HMODULE16 MODULE_CreateDummyModule( LPCSTR filename, HMODULE module32 )
 358 {
 359     HMODULE16 hModule;
 360     NE_MODULE *pModule;
 361     SEGTABLEENTRY *pSegment;
 362     char *pStr,*s;
 363     unsigned int len;
 364     const char* basename;
 365     OFSTRUCT *ofs;
 366     int of_size, size;
 367
 368     /* Extract base filename */
 369     basename = strrchr(filename, '\\');
 370     if (!basename) basename = filename;
 371     else basename++;
 372     len = strlen(basename);
 373     if ((s = strchr(basename, '.'))) len = s - basename;
 374
 375     /* Allocate module */
 376     of_size = sizeof(OFSTRUCT) - sizeof(ofs->szPathName)
 377                     + strlen(filename) + 1;
 378     size = sizeof(NE_MODULE) +
 379                  /* loaded file info */
 380                  ((of_size + 3) & ~3) +
 381                  /* segment table: DS,CS */
 382                  2 * sizeof(SEGTABLEENTRY) +
 383                  /* name table */
 384                  len + 2 +
 385                  /* several empty tables */
 386                  8;
 387
 388     hModule = GlobalAlloc16( GMEM_MOVEABLE | GMEM_ZEROINIT, size );
 389     if (!hModule) return (HMODULE16)11;  /* invalid exe */
 390
 391     FarSetOwner16( hModule, hModule );
 392     pModule = (NE_MODULE *)GlobalLock16( hModule );
 393
 394     /* Set all used entries */
 395     pModule->magic            = IMAGE_OS2_SIGNATURE;
 396     pModule->count            = 1;
 397     pModule->next             = 0;
 398     pModule->flags            = 0;
 399     pModule->dgroup           = 0;
 400     pModule->ss               = 1;
 401     pModule->cs               = 2;
 402     pModule->heap_size        = 0;
 403     pModule->stack_size       = 0;
 404     pModule->seg_count        = 2;
 405     pModule->modref_count     = 0;
 406     pModule->nrname_size      = 0;
 407     pModule->fileinfo         = sizeof(NE_MODULE);
 408     pModule->os_flags         = NE_OSFLAGS_WINDOWS;
 409     pModule->self             = hModule;
 410     pModule->module32         = module32;
 411
 412     /* Set version and flags */
 413     if (module32)
 414     {
 415         pModule->expected_version =
 416             ((PE_HEADER(module32)->OptionalHeader.MajorSubsystemVersion & 0xff) << 8 ) |
 417              (PE_HEADER(module32)->OptionalHeader.MinorSubsystemVersion & 0xff);
 418         pModule->flags |= NE_FFLAGS_WIN32;
 419         if (PE_HEADER(module32)->FileHeader.Characteristics & IMAGE_FILE_DLL)
 420             pModule->flags |= NE_FFLAGS_LIBMODULE | NE_FFLAGS_SINGLEDATA;
 421     }
 422
 423     /* Set loaded file information */
 424     ofs = (OFSTRUCT *)(pModule + 1);
 425     memset( ofs, 0, of_size );
 426     ofs->cBytes = of_size < 256 ? of_size : 255;   /* FIXME */
 427     strcpy( ofs->szPathName, filename );
 428
 429     pSegment = (SEGTABLEENTRY*)((char*)(pModule + 1) + ((of_size + 3) & ~3));
 430     pModule->seg_table = (int)pSegment - (int)pModule;
 431     /* Data segment */
 432     pSegment->size    = 0;
 433     pSegment->flags   = NE_SEGFLAGS_DATA;
 434     pSegment->minsize = 0x1000;
 435     pSegment++;
 436     /* Code segment */
 437     pSegment->flags   = 0;
 438     pSegment++;
 439
 440     /* Module name */
 441     pStr = (char *)pSegment;
 442     pModule->name_table = (int)pStr - (int)pModule;
 443     assert(len<256);
 444     *pStr = len;
 445     lstrcpynA( pStr+1, basename, len+1 );
 446     pStr += len+2;
 447
 448     /* All tables zero terminated */
 449     pModule->res_table = pModule->import_table = pModule->entry_table =
 450                 (int)pStr - (int)pModule;
 451
 452     NE_RegisterModule( pModule );
 453     return hModule;
 454 }
 455
 456
 457 /**********************************************************************
 458  *          MODULE_FindModule
 459  *
 460  * Find a (loaded) win32 module depending on path
 461  *
 462  * RETURNS
 463  *      the module handle if found
 464  *      0 if not
 465  */
 466 WINE_MODREF *MODULE_FindModule(
 467         LPCSTR path     /* [in] pathname of module/library to be found */
 468 ) {
 469     WINE_MODREF *wm;
 470     char dllname[260], *p;
 471
 472     /* Append .DLL to name if no extension present */
 473     strcpy( dllname, path );
 474     if (!(p = strrchr( dllname, '.')) || strchr( p, '/' ) || strchr( p, '\\'))
 475             strcat( dllname, ".DLL" );
 476
 477     for ( wm = MODULE_modref_list; wm; wm = wm->next )
 478     {
 479         if ( !FILE_strcasecmp( dllname, wm->modname ) )
 480             break;
 481         if ( !FILE_strcasecmp( dllname, wm->filename ) )
 482             break;
 483         if ( !FILE_strcasecmp( dllname, wm->short_modname ) )
 484             break;
 485         if ( !FILE_strcasecmp( dllname, wm->short_filename ) )
 486             break;
 487     }
 488
 489     return wm;
 490 }
 491
 492
 493 /* Check whether a file is an OS/2 or a very old Windows executable
 494  * by testing on import of KERNEL.
 495  *
 496  * FIXME: is reading the module imports the only way of discerning
 497  *        old Windows binaries from OS/2 ones ? At least it seems so...
 498  */
 499 static DWORD MODULE_Decide_OS2_OldWin(HANDLE hfile, IMAGE_DOS_HEADER *mz, IMAGE_OS2_HEADER *ne)
 500 {
 501     DWORD currpos = SetFilePointer( hfile, 0, NULL, SEEK_CUR);
 502     DWORD type = SCS_OS216_BINARY;
 503     LPWORD modtab = NULL;
 504     LPSTR nametab = NULL;
 505     DWORD len;
 506     int i;
 507
 508     /* read modref table */
 509     if ( (SetFilePointer( hfile, mz->e_lfanew + ne->ne_modtab, NULL, SEEK_SET ) == -1)
 510       || (!(modtab = HeapAlloc( GetProcessHeap(), 0, ne->ne_cmod*sizeof(WORD))))
 511       || (!(ReadFile(hfile, modtab, ne->ne_cmod*sizeof(WORD), &len, NULL)))
 512       || (len != ne->ne_cmod*sizeof(WORD)) )
 513         goto broken;
 514
 515     /* read imported names table */
 516     if ( (SetFilePointer( hfile, mz->e_lfanew + ne->ne_imptab, NULL, SEEK_SET ) == -1)
 517       || (!(nametab = HeapAlloc( GetProcessHeap(), 0, ne->ne_enttab - ne->ne_imptab)))
 518       || (!(ReadFile(hfile, nametab, ne->ne_enttab - ne->ne_imptab, &len, NULL)))
 519       || (len != ne->ne_enttab - ne->ne_imptab) )
 520         goto broken;
 521
 522     for (i=0; i < ne->ne_cmod; i++)
 523     {
 524         LPSTR module = &nametab[modtab[i]];
 525         TRACE("modref: %.*s\n", module[0], &module[1]);
 526         if (!(strncmp(&module[1], "KERNEL", module[0])))
 527         { /* very old Windows file */
 528             MESSAGE("This seems to be a very old (pre-3.0) Windows executable. Expect crashes, especially if this is a real-mode binary !\n");
 529             type = SCS_WOW_BINARY;
 530             goto good;
 531         }
 532     }
 533
 534 broken:
 535     ERR("Hmm, an error occurred. Is this binary file broken ?\n");
 536
 537 good:
 538     HeapFree( GetProcessHeap(), 0, modtab);
 539     HeapFree( GetProcessHeap(), 0, nametab);
 540     SetFilePointer( hfile, currpos, NULL, SEEK_SET); /* restore filepos */
 541     return type;
 542 }
 543
 544 /***********************************************************************
 545  *           MODULE_GetBinaryType
 546  *
 547  * The GetBinaryType function determines whether a file is executable
 548  * or not and if it is it returns what type of executable it is.
 549  * The type of executable is a property that determines in which
 550  * subsystem an executable file runs under.
 551  *
 552  * Binary types returned:
 553  * SCS_32BIT_BINARY: A Win32 based application
 554  * SCS_DOS_BINARY: An MS-Dos based application
 555  * SCS_WOW_BINARY: A Win16 based application
 556  * SCS_PIF_BINARY: A PIF file that executes an MS-Dos based app
 557  * SCS_POSIX_BINARY: A POSIX based application ( Not implemented )
 558  * SCS_OS216_BINARY: A 16bit OS/2 based application
 559  *
 560  * Returns TRUE if the file is an executable in which case
 561  * the value pointed by lpBinaryType is set.
 562  * Returns FALSE if the file is not an executable or if the function fails.
 563  *
 564  * To do so it opens the file and reads in the header information
 565  * if the extended header information is not present it will
 566  * assume that the file is a DOS executable.
 567  * If the extended header information is present it will
 568  * determine if the file is a 16 or 32 bit Windows executable
 569  * by check the flags in the header.
 570  *
 571  * Note that .COM and .PIF files are only recognized by their
 572  * file name extension; but Windows does it the same way ...
 573  */
 574 static BOOL MODULE_GetBinaryType( HANDLE hfile, LPCSTR filename, LPDWORD lpBinaryType )
 575 {
 576     IMAGE_DOS_HEADER mz_header;
 577     char magic[4], *ptr;
 578     DWORD len;
 579
 580     /* Seek to the start of the file and read the DOS header information.
 581      */
 582     if (    SetFilePointer( hfile, 0, NULL, SEEK_SET ) != -1
 583          && ReadFile( hfile, &mz_header, sizeof(mz_header), &len, NULL )
 584          && len == sizeof(mz_header) )
 585     {
 586         /* Now that we have the header check the e_magic field
 587          * to see if this is a dos image.
 588          */
 589         if ( mz_header.e_magic == IMAGE_DOS_SIGNATURE )
 590         {
 591             BOOL lfanewValid = FALSE;
 592             /* We do have a DOS image so we will now try to seek into
 593              * the file by the amount indicated by the field
 594              * "Offset to extended header" and read in the
 595              * "magic" field information at that location.
 596              * This will tell us if there is more header information
 597              * to read or not.
 598              */
 599             /* But before we do we will make sure that header
 600              * structure encompasses the "Offset to extended header"
 601              * field.
 602              */
 603             if ( (mz_header.e_cparhdr<<4) >= sizeof(IMAGE_DOS_HEADER) )
 604                 if ( ( mz_header.e_crlc == 0 ) ||
 605                      ( mz_header.e_lfarlc >= sizeof(IMAGE_DOS_HEADER) ) )
 606                     if (    mz_header.e_lfanew >= sizeof(IMAGE_DOS_HEADER)
 607                          && SetFilePointer( hfile, mz_header.e_lfanew, NULL, SEEK_SET ) != -1
 608                          && ReadFile( hfile, magic, sizeof(magic), &len, NULL )
 609                          && len == sizeof(magic) )
 610                         lfanewValid = TRUE;
 611
 612             if ( !lfanewValid )
 613             {
 614                 /* If we cannot read this "extended header" we will
 615                  * assume that we have a simple DOS executable.
 616                  */
 617                 *lpBinaryType = SCS_DOS_BINARY;
 618                 return TRUE;
 619             }
 620             else
 621             {
 622                 /* Reading the magic field succeeded so
 623                  * we will try to determine what type it is.
 624                  */
 625                 if ( *(DWORD*)magic      == IMAGE_NT_SIGNATURE )
 626                 {
 627                     /* This is an NT signature.
 628                      */
 629                     *lpBinaryType = SCS_32BIT_BINARY;
 630                     return TRUE;
 631                 }
 632                 else if ( *(WORD*)magic == IMAGE_OS2_SIGNATURE )
 633                 {
 634                     /* The IMAGE_OS2_SIGNATURE indicates that the
 635                      * "extended header is a Windows executable (NE)
 636                      * header."  This can mean either a 16-bit OS/2
 637                      * or a 16-bit Windows or even a DOS program
 638                      * (running under a DOS extender).  To decide
 639                      * which, we'll have to read the NE header.
 640                      */
 641
 642                      IMAGE_OS2_HEADER ne;
 643                      if (    SetFilePointer( hfile, mz_header.e_lfanew, NULL, SEEK_SET ) != -1
 644                           && ReadFile( hfile, &ne, sizeof(ne), &len, NULL )
 645                           && len == sizeof(ne) )
 646                      {
 647                          switch ( ne.ne_exetyp )
 648                          {
 649                          case 2:  *lpBinaryType = SCS_WOW_BINARY;   return TRUE;
 650                          case 5:  *lpBinaryType = SCS_DOS_BINARY;   return TRUE;
 651                          default: *lpBinaryType =
 652                                   MODULE_Decide_OS2_OldWin(hfile, &mz_header, &ne);
 653                                   return TRUE;
 654                          }
 655                      }
 656                      /* Couldn't read header, so abort. */
 657                      return FALSE;
 658                 }
 659                 else
 660                 {
 661                     /* Unknown extended header, but this file is nonetheless
 662                        DOS-executable.
 663                      */
 664                     *lpBinaryType = SCS_DOS_BINARY;
 665                     return TRUE;
 666                 }
 667             }
 668         }
 669     }
 670
 671     /* If we get here, we don't even have a correct MZ header.
 672      * Try to check the file extension for known types ...
 673      */
 674     ptr = strrchr( filename, '.' );
 675     if ( ptr && !strchr( ptr, '\\' ) && !strchr( ptr, '/' ) )
 676     {
 677         if ( !FILE_strcasecmp( ptr, ".COM" ) )
 678         {
 679             *lpBinaryType = SCS_DOS_BINARY;
 680             return TRUE;
 681         }
 682
 683         if ( !FILE_strcasecmp( ptr, ".PIF" ) )
 684         {
 685             *lpBinaryType = SCS_PIF_BINARY;
 686             return TRUE;
 687         }
 688     }
 689
 690     return FALSE;
 691 }
 692
 693 /***********************************************************************
 694  *             GetBinaryTypeA                     [KERNEL32.@]
 695  *             GetBinaryType                      [KERNEL32.@]
 696  */
 697 BOOL WINAPI GetBinaryTypeA( LPCSTR lpApplicationName, LPDWORD lpBinaryType )
 698 {
 699     BOOL ret = FALSE;
 700     HANDLE hfile;
 701
 702     TRACE_(win32)("%s\n", lpApplicationName );
 703
 704     /* Sanity check.
 705      */
 706     if ( lpApplicationName == NULL || lpBinaryType == NULL )
 707         return FALSE;
 708
 709     /* Open the file indicated by lpApplicationName for reading.
 710      */
 711     hfile = CreateFileA( lpApplicationName, GENERIC_READ, FILE_SHARE_READ,
 712                          NULL, OPEN_EXISTING, 0, 0 );
 713     if ( hfile == INVALID_HANDLE_VALUE )
 714         return FALSE;
 715
 716     /* Check binary type
 717      */
 718     ret = MODULE_GetBinaryType( hfile, lpApplicationName, lpBinaryType );
 719
 720     /* Close the file.
 721      */
 722     CloseHandle( hfile );
 723
 724     return ret;
 725 }
 726
 727 /***********************************************************************
 728  *             GetBinaryTypeW                      [KERNEL32.@]
 729  */
 730 BOOL WINAPI GetBinaryTypeW( LPCWSTR lpApplicationName, LPDWORD lpBinaryType )
 731 {
 732     BOOL ret = FALSE;
 733     LPSTR strNew = NULL;
 734
 735     TRACE_(win32)("%s\n", debugstr_w(lpApplicationName) );
 736
 737     /* Sanity check.
 738      */
 739     if ( lpApplicationName == NULL || lpBinaryType == NULL )
 740         return FALSE;
 741
 742     /* Convert the wide string to a ascii string.
 743      */
 744     strNew = HEAP_strdupWtoA( GetProcessHeap(), 0, lpApplicationName );
 745
 746     if ( strNew != NULL )
 747     {
 748         ret = GetBinaryTypeA( strNew, lpBinaryType );
 749
 750         /* Free the allocated string.
 751          */
 752         HeapFree( GetProcessHeap(), 0, strNew );
 753     }
 754
 755     return ret;
 756 }
 757
 758
 759 /***********************************************************************
 760  *           WinExec     (KERNEL.166)
 761  *           WinExec16   (KERNEL32.@)
 762  */
 763 HINSTANCE16 WINAPI WinExec16( LPCSTR lpCmdLine, UINT16 nCmdShow )
 764 {
 765     LPCSTR p, args = NULL;
 766     LPCSTR name_beg, name_end;
 767     LPSTR name, cmdline;
 768     int arglen;
 769     HINSTANCE16 ret;
 770     char buffer[MAX_PATH];
 771
 772     if (*lpCmdLine == '"') /* has to be only one and only at beginning ! */
 773     {
 774       name_beg = lpCmdLine+1;
 775       p = strchr ( lpCmdLine+1, '"' );
 776       if (p)
 777       {
 778           name_end = p;
 779           args = strchr ( p, ' ' );
 780       }
 781       else /* yes, even valid with trailing '"' missing */
 782           name_end = lpCmdLine+strlen(lpCmdLine);
 783     }
 784     else
 785     {
 786       name_beg = lpCmdLine;
 787       args = strchr( lpCmdLine, ' ' );
 788       name_end = args ? args : lpCmdLine+strlen(lpCmdLine);
 789     }
 790
 791     if ((name_beg == lpCmdLine) && (!args))
 792     { /* just use the original cmdline string as file name */
 793         name = (LPSTR)lpCmdLine;
 794     }
 795     else
 796     {
 797         if (!(name = HeapAlloc( GetProcessHeap(), 0, name_end - name_beg + 1 )))
 798             return ERROR_NOT_ENOUGH_MEMORY;
 799         memcpy( name, name_beg, name_end - name_beg );
 800         name[name_end - name_beg] = '\0';
 801     }
 802
 803     if (args)
 804     {
 805         args++;
 806         arglen = strlen(args);
 807         cmdline = HeapAlloc( GetProcessHeap(), 0, 2 + arglen );
 808         cmdline[0] = (BYTE)arglen;
 809         strcpy( cmdline + 1, args );
 810     }
 811     else
 812     {
 813         cmdline = HeapAlloc( GetProcessHeap(), 0, 2 );
 814         cmdline[0] = cmdline[1] = 0;
 815     }
 816
 817     TRACE("name: '%s', cmdline: '%.*s'\n", name, cmdline[0], &cmdline[1]);
 818
 819     if (SearchPathA( NULL, name, ".exe", sizeof(buffer), buffer, NULL ))
 820     {
 821         LOADPARAMS16 params;
 822         WORD showCmd[2];
 823         showCmd[0] = 2;
 824         showCmd[1] = nCmdShow;
 825
 826         params.hEnvironment = 0;
 827         params.cmdLine = MapLS( cmdline );
 828         params.showCmd = MapLS( showCmd );
 829         params.reserved = 0;
 830
 831         ret = LoadModule16( buffer, &params );
 832         UnMapLS( params.cmdLine );
 833         UnMapLS( params.showCmd );
 834     }
 835     else ret = GetLastError();
 836
 837     HeapFree( GetProcessHeap(), 0, cmdline );
 838     if (name != lpCmdLine) HeapFree( GetProcessHeap(), 0, name );
 839
 840     if (ret == 21)  /* 32-bit module */
 841     {
 842         DWORD count;
 843         ReleaseThunkLock( &count );
 844         ret = LOWORD( WinExec( lpCmdLine, nCmdShow ) );
 845         RestoreThunkLock( count );
 846     }
 847     return ret;
 848 }
 849
 850 /***********************************************************************
 851  *           WinExec   (KERNEL32.@)
 852  */
 853 HINSTANCE WINAPI WinExec( LPCSTR lpCmdLine, UINT nCmdShow )
 854 {
 855     PROCESS_INFORMATION info;
 856     STARTUPINFOA startup;
 857     HINSTANCE hInstance;
 858     char *cmdline;
 859
 860     memset( &startup, 0, sizeof(startup) );
 861     startup.cb = sizeof(startup);
 862     startup.dwFlags = STARTF_USESHOWWINDOW;
 863     startup.wShowWindow = nCmdShow;
 864
 865     /* cmdline needs to be writeable for CreateProcess */
 866     if (!(cmdline = HeapAlloc( GetProcessHeap(), 0, strlen(lpCmdLine)+1 ))) return 0;
 867     strcpy( cmdline, lpCmdLine );
 868
 869     if (CreateProcessA( NULL, cmdline, NULL, NULL, FALSE,
 870                         0, NULL, NULL, &startup, &info ))
 871     {
 872         /* Give 30 seconds to the app to come up */
 873         if (wait_input_idle( info.hProcess, 30000 ) == 0xFFFFFFFF)
 874             WARN("WaitForInputIdle failed: Error %ld\n", GetLastError() );
 875         hInstance = (HINSTANCE)33;
 876         /* Close off the handles */
 877         CloseHandle( info.hThread );
 878         CloseHandle( info.hProcess );
 879     }
 880     else if ((hInstance = (HINSTANCE)GetLastError()) >= (HINSTANCE)32)
 881     {
 882         FIXME("Strange error set by CreateProcess: %d\n", hInstance );
 883         hInstance = (HINSTANCE)11;
 884     }
 885     HeapFree( GetProcessHeap(), 0, cmdline );
 886     return hInstance;
 887 }
 888
 889 /**********************************************************************
 890  *          LoadModule    (KERNEL32.@)
 891  */
 892 HINSTANCE WINAPI LoadModule( LPCSTR name, LPVOID paramBlock )
 893 {
 894     LOADPARAMS *params = (LOADPARAMS *)paramBlock;
 895     PROCESS_INFORMATION info;
 896     STARTUPINFOA startup;
 897     HINSTANCE hInstance;
 898     LPSTR cmdline, p;
 899     char filename[MAX_PATH];
 900     BYTE len;
 901
 902     if (!name) return (HINSTANCE)ERROR_FILE_NOT_FOUND;
 903
 904     if (!SearchPathA( NULL, name, ".exe", sizeof(filename), filename, NULL ) &&
 905         !SearchPathA( NULL, name, NULL, sizeof(filename), filename, NULL ))
 906         return (HINSTANCE)GetLastError();
 907
 908     len = (BYTE)params->lpCmdLine[0];
 909     if (!(cmdline = HeapAlloc( GetProcessHeap(), 0, strlen(filename) + len + 2 )))
 910         return (HINSTANCE)ERROR_NOT_ENOUGH_MEMORY;
 911
 912     strcpy( cmdline, filename );
 913     p = cmdline + strlen(cmdline);
 914     *p++ = ' ';
 915     memcpy( p, params->lpCmdLine + 1, len );
 916     p[len] = 0;
 917
 918     memset( &startup, 0, sizeof(startup) );
 919     startup.cb = sizeof(startup);
 920     if (params->lpCmdShow)
 921     {
 922         startup.dwFlags = STARTF_USESHOWWINDOW;
 923         startup.wShowWindow = params->lpCmdShow[1];
 924     }
 925
 926     if (CreateProcessA( filename, cmdline, NULL, NULL, FALSE, 0,
 927                         params->lpEnvAddress, NULL, &startup, &info ))
 928     {
 929         /* Give 30 seconds to the app to come up */
 930         if (wait_input_idle( info.hProcess, 30000 ) ==  0xFFFFFFFF )
 931             WARN("WaitForInputIdle failed: Error %ld\n", GetLastError() );
 932         hInstance = (HINSTANCE)33;
 933         /* Close off the handles */
 934         CloseHandle( info.hThread );
 935         CloseHandle( info.hProcess );
 936     }
 937     else if ((hInstance = (HINSTANCE)GetLastError()) >= (HINSTANCE)32)
 938     {
 939         FIXME("Strange error set by CreateProcess: %d\n", hInstance );
 940         hInstance = (HINSTANCE)11;
 941     }
 942
 943     HeapFree( GetProcessHeap(), 0, cmdline );
 944     return hInstance;
 945 }
 946
 947
 948 /*************************************************************************
 949  *               get_file_name
 950  *
 951  * Helper for CreateProcess: retrieve the file name to load from the
 952  * app name and command line. Store the file name in buffer, and
 953  * return a possibly modified command line.
 954  */
 955 static LPSTR get_file_name( LPCSTR appname, LPSTR cmdline, LPSTR buffer, int buflen )
 956 {
 957     char *name, *pos, *ret = NULL;
 958     const char *p;
 959
 960     /* if we have an app name, everything is easy */
 961
 962     if (appname)
 963     {
 964         /* use the unmodified app name as file name */
 965         lstrcpynA( buffer, appname, buflen );
 966         if (!(ret = cmdline))
 967         {
 968             /* no command-line, create one */
 969             if ((ret = HeapAlloc( GetProcessHeap(), 0, strlen(appname) + 3 )))
 970                 sprintf( ret, "\"%s\"", appname );
 971         }
 972         return ret;
 973     }
 974
 975     if (!cmdline)
 976     {
 977         SetLastError( ERROR_INVALID_PARAMETER );
 978         return NULL;
 979     }
 980
 981     /* first check for a quoted file name */
 982
 983     if ((cmdline[0] == '"') && ((p = strchr( cmdline + 1, '"' ))))
 984     {
 985         int len = p - cmdline - 1;
 986         /* extract the quoted portion as file name */
 987         if (!(name = HeapAlloc( GetProcessHeap(), 0, len + 1 ))) return NULL;
 988         memcpy( name, cmdline + 1, len );
 989         name[len] = 0;
 990
 991         if (SearchPathA( NULL, name, ".exe", buflen, buffer, NULL ) ||
 992             SearchPathA( NULL, name, NULL, buflen, buffer, NULL ))
 993             ret = cmdline;  /* no change necessary */
 994         goto done;
 995     }
 996
 997     /* now try the command-line word by word */
 998
 999     if (!(name = HeapAlloc( GetProcessHeap(), 0, strlen(cmdline) + 1 ))) return NULL;
1000     pos = name;
1001     p = cmdline;
1002
1003     while (*p)
1004     {
1005         do *pos++ = *p++; while (*p && *p != ' ');
1006         *pos = 0;
1007         TRACE("trying '%s'\n", name );
1008         if (SearchPathA( NULL, name, ".exe", buflen, buffer, NULL ) ||
1009             SearchPathA( NULL, name, NULL, buflen, buffer, NULL ))
1010         {
1011             ret = cmdline;
1012             break;
1013         }
1014     }
1015
1016     if (!ret || !strchr( name, ' ' )) goto done;  /* no change necessary */
1017
1018     /* now build a new command-line with quotes */
1019
1020     if (!(ret = HeapAlloc( GetProcessHeap(), 0, strlen(cmdline) + 3 ))) goto done;
1021     sprintf( ret, "\"%s\"%s", name, p );
1022
1023  done:
1024     HeapFree( GetProcessHeap(), 0, name );
1025     return ret;
1026 }
1027
1028
1029 /**********************************************************************
1030  *       CreateProcessA          (KERNEL32.@)
1031  */
1032 BOOL WINAPI CreateProcessA( LPCSTR lpApplicationName, LPSTR lpCommandLine,
1033                             LPSECURITY_ATTRIBUTES lpProcessAttributes,
1034                             LPSECURITY_ATTRIBUTES lpThreadAttributes,
1035                             BOOL bInheritHandles, DWORD dwCreationFlags,
1036                             LPVOID lpEnvironment, LPCSTR lpCurrentDirectory,
1037                             LPSTARTUPINFOA lpStartupInfo,
1038                             LPPROCESS_INFORMATION lpProcessInfo )
1039 {
1040     BOOL retv = FALSE;
1041     HANDLE hFile;
1042     DWORD type;
1043     char name[MAX_PATH];
1044     LPSTR tidy_cmdline;
1045
1046     /* Process the AppName and/or CmdLine to get module name and path */
1047
1048     TRACE("app %s cmdline %s\n", debugstr_a(lpApplicationName), debugstr_a(lpCommandLine) );
1049
1050     if (!(tidy_cmdline = get_file_name( lpApplicationName, lpCommandLine, name, sizeof(name) )))
1051         return FALSE;
1052
1053     /* Warn if unsupported features are used */
1054
1055     if (dwCreationFlags & NORMAL_PRIORITY_CLASS)
1056         FIXME("(%s,...): NORMAL_PRIORITY_CLASS ignored\n", name);
1057     if (dwCreationFlags & IDLE_PRIORITY_CLASS)
1058         FIXME("(%s,...): IDLE_PRIORITY_CLASS ignored\n", name);
1059     if (dwCreationFlags & HIGH_PRIORITY_CLASS)
1060         FIXME("(%s,...): HIGH_PRIORITY_CLASS ignored\n", name);
1061     if (dwCreationFlags & REALTIME_PRIORITY_CLASS)
1062         FIXME("(%s,...): REALTIME_PRIORITY_CLASS ignored\n", name);
1063     if (dwCreationFlags & CREATE_NEW_PROCESS_GROUP)
1064         FIXME("(%s,...): CREATE_NEW_PROCESS_GROUP ignored\n", name);
1065     if (dwCreationFlags & CREATE_UNICODE_ENVIRONMENT)
1066         FIXME("(%s,...): CREATE_UNICODE_ENVIRONMENT ignored\n", name);
1067     if (dwCreationFlags & CREATE_SEPARATE_WOW_VDM)
1068         FIXME("(%s,...): CREATE_SEPARATE_WOW_VDM ignored\n", name);
1069     if (dwCreationFlags & CREATE_SHARED_WOW_VDM)
1070         FIXME("(%s,...): CREATE_SHARED_WOW_VDM ignored\n", name);
1071     if (dwCreationFlags & CREATE_DEFAULT_ERROR_MODE)
1072         FIXME("(%s,...): CREATE_DEFAULT_ERROR_MODE ignored\n", name);
1073     if (dwCreationFlags & CREATE_NO_WINDOW)
1074         FIXME("(%s,...): CREATE_NO_WINDOW ignored\n", name);
1075     if (dwCreationFlags & PROFILE_USER)
1076         FIXME("(%s,...): PROFILE_USER ignored\n", name);
1077     if (dwCreationFlags & PROFILE_KERNEL)
1078         FIXME("(%s,...): PROFILE_KERNEL ignored\n", name);
1079     if (dwCreationFlags & PROFILE_SERVER)
1080         FIXME("(%s,...): PROFILE_SERVER ignored\n", name);
1081     if (lpStartupInfo->lpDesktop)
1082         FIXME("(%s,...): lpStartupInfo->lpDesktop %s ignored\n",
1083                       name, debugstr_a(lpStartupInfo->lpDesktop));
1084     if (lpStartupInfo->lpTitle)
1085         FIXME("(%s,...): lpStartupInfo->lpTitle %s ignored\n",
1086                       name, lpStartupInfo->lpTitle);
1087     if (lpStartupInfo->dwFlags & STARTF_USECOUNTCHARS)
1088         FIXME("(%s,...): STARTF_USECOUNTCHARS (%ld,%ld) ignored\n",
1089                       name, lpStartupInfo->dwXCountChars, lpStartupInfo->dwYCountChars);
1090     if (lpStartupInfo->dwFlags & STARTF_USEFILLATTRIBUTE)
1091         FIXME("(%s,...): STARTF_USEFILLATTRIBUTE %lx ignored\n",
1092                       name, lpStartupInfo->dwFillAttribute);
1093     if (lpStartupInfo->dwFlags & STARTF_RUNFULLSCREEN)
1094         FIXME("(%s,...): STARTF_RUNFULLSCREEN ignored\n", name);
1095     if (lpStartupInfo->dwFlags & STARTF_FORCEONFEEDBACK)
1096         FIXME("(%s,...): STARTF_FORCEONFEEDBACK ignored\n", name);
1097     if (lpStartupInfo->dwFlags & STARTF_FORCEOFFFEEDBACK)
1098         FIXME("(%s,...): STARTF_FORCEOFFFEEDBACK ignored\n", name);
1099     if (lpStartupInfo->dwFlags & STARTF_USEHOTKEY)
1100         FIXME("(%s,...): STARTF_USEHOTKEY ignored\n", name);
1101
1102     /* Open file and determine executable type */
1103
1104     hFile = CreateFileA( name, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, 0 );
1105     if (hFile == INVALID_HANDLE_VALUE) goto done;
1106
1107     if ( !MODULE_GetBinaryType( hFile, name, &type ) )
1108     {
1109         CloseHandle( hFile );
1110         retv = PROCESS_Create( 0, name, tidy_cmdline, lpEnvironment,
1111                                lpProcessAttributes, lpThreadAttributes,
1112                                bInheritHandles, dwCreationFlags,
1113                                lpStartupInfo, lpProcessInfo, lpCurrentDirectory );
1114         goto done;
1115     }
1116
1117     /* Create process */
1118
1119     switch ( type )
1120     {
1121     case SCS_32BIT_BINARY:
1122     case SCS_WOW_BINARY:
1123     case SCS_DOS_BINARY:
1124         retv = PROCESS_Create( hFile, name, tidy_cmdline, lpEnvironment,
1125                                lpProcessAttributes, lpThreadAttributes,
1126                                bInheritHandles, dwCreationFlags,
1127                                lpStartupInfo, lpProcessInfo, lpCurrentDirectory);
1128         break;
1129
1130     case SCS_PIF_BINARY:
1131     case SCS_POSIX_BINARY:
1132     case SCS_OS216_BINARY:
1133         FIXME("Unsupported executable type: %ld\n", type );
1134         /* fall through */
1135
1136     default:
1137         SetLastError( ERROR_BAD_FORMAT );
1138         break;
1139     }
1140     CloseHandle( hFile );
1141
1142  done:
1143     if (tidy_cmdline != lpCommandLine) HeapFree( GetProcessHeap(), 0, tidy_cmdline );
1144     return retv;
1145 }
1146
1147 /**********************************************************************
1148  *       CreateProcessW          (KERNEL32.@)
1149  * NOTES
1150  *  lpReserved is not converted
1151  */
1152 BOOL WINAPI CreateProcessW( LPCWSTR lpApplicationName, LPWSTR lpCommandLine,
1153                                 LPSECURITY_ATTRIBUTES lpProcessAttributes,
1154                                 LPSECURITY_ATTRIBUTES lpThreadAttributes,
1155                                 BOOL bInheritHandles, DWORD dwCreationFlags,
1156                                 LPVOID lpEnvironment, LPCWSTR lpCurrentDirectory,
1157                                 LPSTARTUPINFOW lpStartupInfo,
1158                                 LPPROCESS_INFORMATION lpProcessInfo )
1159 {   BOOL ret;
1160     STARTUPINFOA StartupInfoA;
1161
1162     LPSTR lpApplicationNameA = HEAP_strdupWtoA (GetProcessHeap(),0,lpApplicationName);
1163     LPSTR lpCommandLineA = HEAP_strdupWtoA (GetProcessHeap(),0,lpCommandLine);
1164     LPSTR lpCurrentDirectoryA = HEAP_strdupWtoA (GetProcessHeap(),0,lpCurrentDirectory);
1165
1166     memcpy (&StartupInfoA, lpStartupInfo, sizeof(STARTUPINFOA));
1167     StartupInfoA.lpDesktop = HEAP_strdupWtoA (GetProcessHeap(),0,lpStartupInfo->lpDesktop);
1168     StartupInfoA.lpTitle = HEAP_strdupWtoA (GetProcessHeap(),0,lpStartupInfo->lpTitle);
1169
1170     TRACE_(win32)("(%s,%s,...)\n", debugstr_w(lpApplicationName), debugstr_w(lpCommandLine));
1171
1172     if (lpStartupInfo->lpReserved)
1173       FIXME_(win32)("StartupInfo.lpReserved is used, please report (%s)\n", debugstr_w(lpStartupInfo->lpReserved));
1174
1175     ret = CreateProcessA(  lpApplicationNameA,  lpCommandLineA,
1176                              lpProcessAttributes, lpThreadAttributes,
1177                              bInheritHandles, dwCreationFlags,
1178                              lpEnvironment, lpCurrentDirectoryA,
1179                              &StartupInfoA, lpProcessInfo );
1180
1181     HeapFree( GetProcessHeap(), 0, lpCurrentDirectoryA );
1182     HeapFree( GetProcessHeap(), 0, lpCommandLineA );
1183     HeapFree( GetProcessHeap(), 0, StartupInfoA.lpDesktop );
1184     HeapFree( GetProcessHeap(), 0, StartupInfoA.lpTitle );
1185
1186     return ret;
1187 }
1188
1189 /***********************************************************************
1190  *              GetModuleHandleA         (KERNEL32.@)
1191  *              GetModuleHandle32        (KERNEL.488)
1192  */
1193 HMODULE WINAPI GetModuleHandleA(LPCSTR module)
1194 {
1195     WINE_MODREF *wm;
1196
1197     if ( module == NULL )
1198         wm = exe_modref;
1199     else
1200         wm = MODULE_FindModule( module );
1201
1202     return wm? wm->module : 0;
1203 }
1204
1205 /***********************************************************************
1206  *              GetModuleHandleW (KERNEL32.@)
1207  */
1208 HMODULE WINAPI GetModuleHandleW(LPCWSTR module)
1209 {
1210     HMODULE hModule;
1211     LPSTR modulea = HEAP_strdupWtoA( GetProcessHeap(), 0, module );
1212     hModule = GetModuleHandleA( modulea );
1213     HeapFree( GetProcessHeap(), 0, modulea );
1214     return hModule;
1215 }
1216
1217
1218 /***********************************************************************
1219  *              GetModuleFileNameA      (KERNEL32.@)
1220  *              GetModuleFileName32     (KERNEL.487)
1221  *
1222  * GetModuleFileNameA seems to *always* return the long path;
1223  * it's only GetModuleFileName16 that decides between short/long path
1224  * by checking if exe version >= 4.0.
1225  * (SDK docu doesn't mention this)
1226  */
1227 DWORD WINAPI GetModuleFileNameA(
1228         HMODULE hModule,        /* [in] module handle (32bit) */
1229         LPSTR lpFileName,       /* [out] filenamebuffer */
1230         DWORD size )            /* [in] size of filenamebuffer */
1231 {
1232     WINE_MODREF *wm;
1233
1234     RtlAcquirePebLock();
1235
1236     lpFileName[0] = 0;
1237     if ((wm = MODULE32_LookupHMODULE( hModule )))
1238         lstrcpynA( lpFileName, wm->filename, size );
1239
1240     RtlReleasePebLock();
1241     TRACE("%s\n", lpFileName );
1242     return strlen(lpFileName);
1243 }
1244
1245
1246 /***********************************************************************
1247  *              GetModuleFileNameW      (KERNEL32.@)
1248  */
1249 DWORD WINAPI GetModuleFileNameW( HMODULE hModule, LPWSTR lpFileName,
1250                                    DWORD size )
1251 {
1252     LPSTR fnA = (char*)HeapAlloc( GetProcessHeap(), 0, size );
1253     DWORD res = GetModuleFileNameA( hModule, fnA, size );
1254     if (size > 0 && !MultiByteToWideChar( CP_ACP, 0, fnA, -1, lpFileName, size ))
1255         lpFileName[size-1] = 0;
1256     HeapFree( GetProcessHeap(), 0, fnA );
1257     return res;
1258 }
1259
1260
1261 /***********************************************************************
1262  *           LoadLibraryExA   (KERNEL32.@)
1263  */
1264 HMODULE WINAPI LoadLibraryExA(LPCSTR libname, HANDLE hfile, DWORD flags)
1265 {
1266         WINE_MODREF *wm;
1267
1268         if(!libname)
1269         {
1270                 SetLastError(ERROR_INVALID_PARAMETER);
1271                 return 0;
1272         }
1273
1274         if (flags & LOAD_LIBRARY_AS_DATAFILE)
1275         {
1276             char filename[256];
1277             HMODULE hmod = 0;
1278
1279             /* This method allows searching for the 'native' libraries only */
1280             if (SearchPathA( NULL, libname, ".dll", sizeof(filename), filename, NULL ))
1281             {
1282                 /* FIXME: maybe we should use the hfile parameter instead */
1283                 HANDLE hFile = CreateFileA( filename, GENERIC_READ, FILE_SHARE_READ,
1284                                             NULL, OPEN_EXISTING, 0, 0 );
1285                 if (hFile != INVALID_HANDLE_VALUE)
1286                 {
1287                     hmod = PE_LoadImage( hFile, filename, flags );
1288                     CloseHandle( hFile );
1289                 }
1290                 if (hmod) return (HMODULE)((ULONG_PTR)hmod + 1);
1291             }
1292             flags |= DONT_RESOLVE_DLL_REFERENCES; /* Just in case */
1293             /* Fallback to normal behaviour */
1294         }
1295
1296         RtlAcquirePebLock();
1297
1298         wm = MODULE_LoadLibraryExA( libname, hfile, flags );
1299         if ( wm )
1300         {
1301                 if ( !MODULE_DllProcessAttach( wm, NULL ) )
1302                 {
1303                         WARN_(module)("Attach failed for module '%s', \n", libname);
1304                         MODULE_FreeLibrary(wm);
1305                         SetLastError(ERROR_DLL_INIT_FAILED);
1306                         wm = NULL;
1307                 }
1308         }
1309
1310         RtlReleasePebLock();
1311         return wm ? wm->module : 0;
1312 }
1313
1314 /***********************************************************************
1315  *      allocate_lib_dir
1316  *
1317  * helper for MODULE_LoadLibraryExA.  Allocate space to hold the directory
1318  * portion of the provided name and put the name in it.
1319  *
1320  */
1321 static LPCSTR allocate_lib_dir(LPCSTR libname)
1322 {
1323     LPCSTR p, pmax;
1324     LPSTR result;
1325     int length;
1326
1327     pmax = libname;
1328     if ((p = strrchr( pmax, '\\' ))) pmax = p + 1;
1329     if ((p = strrchr( pmax, '/' ))) pmax = p + 1; /* Naughty.  MSDN says don't */
1330     if (pmax == libname && pmax[0] && pmax[1] == ':') pmax += 2;
1331
1332     length = pmax - libname;
1333
1334     result = HeapAlloc (GetProcessHeap(), 0, length+1);
1335
1336     if (result)
1337     {
1338         strncpy (result, libname, length);
1339         result [length] = '\0';
1340     }
1341
1342     return result;
1343 }
1344
1345 /***********************************************************************
1346  *      MODULE_LoadLibraryExA   (internal)
1347  *
1348  * Load a PE style module according to the load order.
1349  *
1350  * The HFILE parameter is not used and marked reserved in the SDK. I can
1351  * only guess that it should force a file to be mapped, but I rather
1352  * ignore the parameter because it would be extremely difficult to
1353  * integrate this with different types of module represenations.
1354  *
1355  * libdir is used to support LOAD_WITH_ALTERED_SEARCH_PATH during the recursion
1356  *        on this function.  When first called from LoadLibraryExA it will be
1357  *        NULL but thereafter it may point to a buffer containing the path
1358  *        portion of the library name.  Note that the recursion all occurs
1359  *        within a Critical section (see LoadLibraryExA) so the use of a
1360  *        static is acceptable.
1361  *        (We have to use a static variable at some point anyway, to pass the
1362  *        information from BUILTIN32_dlopen through dlopen and the builtin's
1363  *        init function into load_library).
1364  * allocated_libdir is TRUE in the stack frame that allocated libdir
1365  */
1366 WINE_MODREF *MODULE_LoadLibraryExA( LPCSTR libname, HFILE hfile, DWORD flags )
1367 {
1368         DWORD err = GetLastError();
1369         WINE_MODREF *pwm;
1370         int i;
1371         enum loadorder_type loadorder[LOADORDER_NTYPES];
1372         LPSTR filename, p;
1373         const char *filetype = "";
1374         DWORD found;
1375         BOOL allocated_libdir = FALSE;
1376         static LPCSTR libdir = NULL; /* See above */
1377
1378         if ( !libname ) return NULL;
1379
1380         filename = HeapAlloc ( GetProcessHeap(), 0, MAX_PATH + 1 );
1381         if ( !filename ) return NULL;
1382
1383         RtlAcquirePebLock();
1384
1385         if ((flags & LOAD_WITH_ALTERED_SEARCH_PATH) && FILE_contains_path(libname))
1386         {
1387             if (!(libdir = allocate_lib_dir(libname))) goto error;
1388             allocated_libdir = TRUE;
1389         }
1390
1391         if (!libdir || allocated_libdir)
1392             found = SearchPathA(NULL, libname, ".dll", MAX_PATH, filename, NULL);
1393         else
1394             found = DIR_SearchAlternatePath(libdir, libname, ".dll", MAX_PATH, filename, NULL);
1395
1396         /* build the modules filename */
1397         if (!found)
1398         {
1399             if ( ! GetSystemDirectoryA ( filename, MAX_PATH ) )
1400                 goto error;
1401
1402             /* if the library name contains a path and can not be found, return an error.
1403                exception: if the path is the system directory, proceed, so that modules,
1404                which are not PE-modules can be loaded
1405
1406                if the library name does not contain a path and can not be found, assume the
1407                system directory is meant */
1408
1409             if ( ! FILE_strncasecmp ( filename, libname, strlen ( filename ) ))
1410                 strcpy ( filename, libname );
1411             else
1412             {
1413                 if (FILE_contains_path(libname)) goto error;
1414                 strcat ( filename, "\\" );
1415                 strcat ( filename, libname );
1416             }
1417
1418             /* if the filename doesn't have an extension append .DLL */
1419             if (!(p = strrchr( filename, '.')) || strchr( p, '/' ) || strchr( p, '\\'))
1420                 strcat( filename, ".dll" );
1421         }
1422
1423         /* Check for already loaded module */
1424         if (!(pwm = MODULE_FindModule(filename)) && !FILE_contains_path(libname))
1425         {
1426             LPSTR       fn = HeapAlloc ( GetProcessHeap(), 0, MAX_PATH + 1 );
1427             if (fn)
1428             {
1429                 /* since the default loading mechanism uses a more detailed algorithm
1430                  * than SearchPath (like using PATH, which can even be modified between
1431                  * two attempts of loading the same DLL), the look-up above (with
1432                  * SearchPath) can have put the file in system directory, whereas it
1433                  * has already been loaded but with a different path. So do a specific
1434                  * look-up with filename (without any path)
1435                  */
1436                 strcpy ( fn, libname );
1437                 /* if the filename doesn't have an extension append .DLL */
1438                 if (!strrchr( fn, '.')) strcat( fn, ".dll" );
1439                 if ((pwm = MODULE_FindModule( fn )) != NULL)
1440                    strcpy( filename, fn );
1441                 HeapFree( GetProcessHeap(), 0, fn );
1442             }
1443         }
1444         if (pwm)
1445         {
1446                 if(!(pwm->flags & WINE_MODREF_MARKER))
1447                         pwm->refCount++;
1448
1449                 if ((pwm->flags & WINE_MODREF_DONT_RESOLVE_REFS) &&
1450                     !(flags & DONT_RESOLVE_DLL_REFERENCES))
1451                 {
1452                     pwm->flags &= ~WINE_MODREF_DONT_RESOLVE_REFS;
1453                     PE_fixup_imports( pwm );
1454                 }
1455                 TRACE("Already loaded module '%s' at 0x%08x, count=%d\n", filename, pwm->module, pwm->refCount);
1456                 if (allocated_libdir)
1457                 {
1458                     HeapFree ( GetProcessHeap(), 0, (LPSTR)libdir );
1459                     libdir = NULL;
1460                 }
1461                 RtlReleasePebLock();
1462                 HeapFree ( GetProcessHeap(), 0, filename );
1463                 return pwm;
1464         }
1465
1466         MODULE_GetLoadOrder( loadorder, filename, TRUE);
1467
1468         for(i = 0; i < LOADORDER_NTYPES; i++)
1469         {
1470                 if (loadorder[i] == LOADORDER_INVALID) break;
1471                 SetLastError( ERROR_FILE_NOT_FOUND );
1472
1473                 switch(loadorder[i])
1474                 {
1475                 case LOADORDER_DLL:
1476                         TRACE("Trying native dll '%s'\n", filename);
1477                         pwm = PE_LoadLibraryExA(filename, flags);
1478                         filetype = "native";
1479                         break;
1480
1481                 case LOADORDER_SO:
1482                         TRACE("Trying so-library '%s'\n", filename);
1483                         pwm = ELF_LoadLibraryExA(filename, flags);
1484                         filetype = "so";
1485                         break;
1486
1487                 case LOADORDER_BI:
1488                         TRACE("Trying built-in '%s'\n", filename);
1489                         pwm = BUILTIN32_LoadLibraryExA(filename, flags);
1490                         filetype = "builtin";
1491                         break;
1492
1493                 default:
1494                         pwm = NULL;
1495                         break;
1496                 }
1497
1498                 if(pwm)
1499                 {
1500                         /* Initialize DLL just loaded */
1501                         TRACE("Loaded module '%s' at 0x%08x\n", filename, pwm->module);
1502                         if (!TRACE_ON(module))
1503                             TRACE_(loaddll)("Loaded module '%s' : %s\n", filename, filetype);
1504                         /* Set the refCount here so that an attach failure will */
1505                         /* decrement the dependencies through the MODULE_FreeLibrary call. */
1506                         pwm->refCount++;
1507
1508                         if (allocated_libdir)
1509                         {
1510                             HeapFree ( GetProcessHeap(), 0, (LPSTR)libdir );
1511                             libdir = NULL;
1512                         }
1513                         RtlReleasePebLock();
1514                         SetLastError( err );  /* restore last error */
1515                         HeapFree ( GetProcessHeap(), 0, filename );
1516                         return pwm;
1517                 }
1518
1519                 if(GetLastError() != ERROR_FILE_NOT_FOUND)
1520                         break;
1521         }
1522
1523  error:
1524         if (allocated_libdir)
1525         {
1526             HeapFree ( GetProcessHeap(), 0, (LPSTR)libdir );
1527             libdir = NULL;
1528         }
1529         RtlReleasePebLock();
1530         WARN("Failed to load module '%s'; error=0x%08lx\n", filename, GetLastError());
1531         HeapFree ( GetProcessHeap(), 0, filename );
1532         return NULL;
1533 }
1534
1535 /***********************************************************************
1536  *           LoadLibraryA         (KERNEL32.@)
1537  */
1538 HMODULE WINAPI LoadLibraryA(LPCSTR libname) {
1539         return LoadLibraryExA(libname,0,0);
1540 }
1541
1542 /***********************************************************************
1543  *           LoadLibraryW         (KERNEL32.@)
1544  */
1545 HMODULE WINAPI LoadLibraryW(LPCWSTR libnameW)
1546 {
1547     return LoadLibraryExW(libnameW,0,0);
1548 }
1549
1550 /***********************************************************************
1551  *           LoadLibrary32        (KERNEL.452)
1552  *           LoadSystemLibrary32  (KERNEL.482)
1553  */
1554 HMODULE WINAPI LoadLibrary32_16( LPCSTR libname )
1555 {
1556     HMODULE hModule;
1557     DWORD count;
1558
1559     ReleaseThunkLock( &count );
1560     hModule = LoadLibraryA( libname );
1561     RestoreThunkLock( count );
1562     return hModule;
1563 }
1564
1565 /***********************************************************************
1566  *           LoadLibraryExW       (KERNEL32.@)
1567  */
1568 HMODULE WINAPI LoadLibraryExW(LPCWSTR libnameW,HANDLE hfile,DWORD flags)
1569 {
1570     LPSTR libnameA = HEAP_strdupWtoA( GetProcessHeap(), 0, libnameW );
1571     HMODULE ret = LoadLibraryExA( libnameA , hfile, flags );
1572
1573     HeapFree( GetProcessHeap(), 0, libnameA );
1574     return ret;
1575 }
1576
1577 /***********************************************************************
1578  *           MODULE_FlushModrefs
1579  *
1580  * NOTE: Assumes that the process critical section is held!
1581  *
1582  * Remove all unused modrefs and call the internal unloading routines
1583  * for the library type.
1584  */
1585 static void MODULE_FlushModrefs(void)
1586 {
1587         WINE_MODREF *wm, *next;
1588
1589         for(wm = MODULE_modref_list; wm; wm = next)
1590         {
1591                 next = wm->next;
1592
1593                 if(wm->refCount)
1594                         continue;
1595
1596                 /* Unlink this modref from the chain */
1597                 if(wm->next)
1598                         wm->next->prev = wm->prev;
1599                 if(wm->prev)
1600                         wm->prev->next = wm->next;
1601                 if(wm == MODULE_modref_list)
1602                         MODULE_modref_list = wm->next;
1603
1604                 TRACE(" unloading %s\n", wm->filename);
1605                 if (wm->dlhandle) wine_dll_unload( wm->dlhandle );
1606                 else UnmapViewOfFile( (LPVOID)wm->module );
1607                 FreeLibrary16(wm->hDummyMod);
1608                 HeapFree( GetProcessHeap(), 0, wm->deps );
1609                 HeapFree( GetProcessHeap(), 0, wm );
1610         }
1611 }
1612
1613 /***********************************************************************
1614  *           FreeLibrary   (KERNEL32.@)
1615  *           FreeLibrary32 (KERNEL.486)
1616  */
1617 BOOL WINAPI FreeLibrary(HINSTANCE hLibModule)
1618 {
1619     BOOL retv = FALSE;
1620     WINE_MODREF *wm;
1621
1622     if (!hLibModule)
1623     {
1624         SetLastError( ERROR_INVALID_HANDLE );
1625         return FALSE;
1626     }
1627
1628     if ((ULONG_PTR)hLibModule & 1)
1629     {
1630         /* this is a LOAD_LIBRARY_AS_DATAFILE module */
1631         char *ptr = (char *)hLibModule - 1;
1632         UnmapViewOfFile( ptr );
1633         return TRUE;
1634     }
1635
1636     RtlAcquirePebLock();
1637     free_lib_count++;
1638
1639     if ((wm = MODULE32_LookupHMODULE( hLibModule ))) retv = MODULE_FreeLibrary( wm );
1640
1641     free_lib_count--;
1642     RtlReleasePebLock();
1643
1644     return retv;
1645 }
1646
1647 /***********************************************************************
1648  *           MODULE_DecRefCount
1649  *
1650  * NOTE: Assumes that the process critical section is held!
1651  */
1652 static void MODULE_DecRefCount( WINE_MODREF *wm )
1653 {
1654     int i;
1655
1656     if ( wm->flags & WINE_MODREF_MARKER )
1657         return;
1658
1659     if ( wm->refCount <= 0 )
1660         return;
1661
1662     --wm->refCount;
1663     TRACE("(%s) refCount: %d\n", wm->modname, wm->refCount );
1664
1665     if ( wm->refCount == 0 )
1666     {
1667         wm->flags |= WINE_MODREF_MARKER;
1668
1669         for ( i = 0; i < wm->nDeps; i++ )
1670             if ( wm->deps[i] )
1671                 MODULE_DecRefCount( wm->deps[i] );
1672
1673         wm->flags &= ~WINE_MODREF_MARKER;
1674     }
1675 }
1676
1677 /***********************************************************************
1678  *           MODULE_FreeLibrary
1679  *
1680  * NOTE: Assumes that the process critical section is held!
1681  */
1682 BOOL MODULE_FreeLibrary( WINE_MODREF *wm )
1683 {
1684     TRACE("(%s) - START\n", wm->modname );
1685
1686     /* Recursively decrement reference counts */
1687     MODULE_DecRefCount( wm );
1688
1689     /* Call process detach notifications */
1690     if ( free_lib_count <= 1 )
1691     {
1692         MODULE_DllProcessDetach( FALSE, NULL );
1693         SERVER_START_REQ( unload_dll )
1694         {
1695             req->base = (void *)wm->module;
1696             wine_server_call( req );
1697         }
1698         SERVER_END_REQ;
1699         MODULE_FlushModrefs();
1700     }
1701
1702     TRACE("END\n");
1703
1704     return TRUE;
1705 }
1706
1707
1708 /***********************************************************************
1709  *           FreeLibraryAndExitThread (KERNEL32.@)
1710  */
1711 VOID WINAPI FreeLibraryAndExitThread(HINSTANCE hLibModule, DWORD dwExitCode)
1712 {
1713     FreeLibrary(hLibModule);
1714     ExitThread(dwExitCode);
1715 }
1716
1717 /***********************************************************************
1718  *           PrivateLoadLibrary       (KERNEL32.@)
1719  *
1720  * FIXME: rough guesswork, don't know what "Private" means
1721  */
1722 HINSTANCE16 WINAPI PrivateLoadLibrary(LPCSTR libname)
1723 {
1724     return LoadLibrary16(libname);
1725 }
1726
1727
1728
1729 /***********************************************************************
1730  *           PrivateFreeLibrary       (KERNEL32.@)
1731  *
1732  * FIXME: rough guesswork, don't know what "Private" means
1733  */
1734 void WINAPI PrivateFreeLibrary(HINSTANCE16 handle)
1735 {
1736     FreeLibrary16(handle);
1737 }
1738
1739
1740 /***********************************************************************
1741  *           GetProcAddress16   (KERNEL32.37)
1742  * Get procaddress in 16bit module from win32... (kernel32 undoc. ordinal func)
1743  */
1744 FARPROC16 WINAPI WIN32_GetProcAddress16( HMODULE hModule, LPCSTR name )
1745 {
1746     if (!hModule) {
1747         WARN("hModule may not be 0!\n");
1748         return (FARPROC16)0;
1749     }
1750     if (HIWORD(hModule))
1751     {
1752         WARN("hModule is Win32 handle (%08x)\n", hModule );
1753         return (FARPROC16)0;
1754     }
1755     return GetProcAddress16( LOWORD(hModule), name );
1756 }
1757
1758 /***********************************************************************
1759  *           GetProcAddress   (KERNEL.50)
1760  */
1761 FARPROC16 WINAPI GetProcAddress16( HMODULE16 hModule, LPCSTR name )
1762 {
1763     WORD ordinal;
1764     FARPROC16 ret;
1765
1766     if (!hModule) hModule = GetCurrentTask();
1767     hModule = GetExePtr( hModule );
1768
1769     if (HIWORD(name) != 0)
1770     {
1771         ordinal = NE_GetOrdinal( hModule, name );
1772         TRACE("%04x '%s'\n", hModule, name );
1773     }
1774     else
1775     {
1776         ordinal = LOWORD(name);
1777         TRACE("%04x %04x\n", hModule, ordinal );
1778     }
1779     if (!ordinal) return (FARPROC16)0;
1780
1781     ret = NE_GetEntryPoint( hModule, ordinal );
1782
1783     TRACE("returning %08x\n", (UINT)ret );
1784     return ret;
1785 }
1786
1787
1788 /***********************************************************************
1789  *           GetProcAddress             (KERNEL32.@)
1790  */
1791 FARPROC WINAPI GetProcAddress( HMODULE hModule, LPCSTR function )
1792 {
1793     return MODULE_GetProcAddress( hModule, function, TRUE );
1794 }
1795
1796 /***********************************************************************
1797  *           GetProcAddress32                   (KERNEL.453)
1798  */
1799 FARPROC WINAPI GetProcAddress32_16( HMODULE hModule, LPCSTR function )
1800 {
1801     return MODULE_GetProcAddress( hModule, function, FALSE );
1802 }
1803
1804 /***********************************************************************
1805  *           MODULE_GetProcAddress              (internal)
1806  */
1807 FARPROC MODULE_GetProcAddress(
1808         HMODULE hModule,        /* [in] current module handle */
1809         LPCSTR function,        /* [in] function to be looked up */
1810         BOOL snoop )
1811 {
1812     WINE_MODREF *wm;
1813     FARPROC     retproc = 0;
1814
1815     if (HIWORD(function))
1816         TRACE_(win32)("(%08lx,%s)\n",(DWORD)hModule,function);
1817     else
1818         TRACE_(win32)("(%08lx,%p)\n",(DWORD)hModule,function);
1819
1820     RtlAcquirePebLock();
1821     if ((wm = MODULE32_LookupHMODULE( hModule )))
1822     {
1823         retproc = wm->find_export( wm, function, snoop );
1824         if (!retproc) SetLastError(ERROR_PROC_NOT_FOUND);
1825     }
1826     RtlReleasePebLock();
1827     return retproc;
1828 }
1829
1830
1831 /***************************************************************************
1832  *              HasGPHandler                    (KERNEL.338)
1833  */
1834
1835 #include "pshpack1.h"
1836 typedef struct _GPHANDLERDEF
1837 {
1838     WORD selector;
1839     WORD rangeStart;
1840     WORD rangeEnd;
1841     WORD handler;
1842 } GPHANDLERDEF;
1843 #include "poppack.h"
1844
1845 SEGPTR WINAPI HasGPHandler16( SEGPTR address )
1846 {
1847     HMODULE16 hModule;
1848     int gpOrdinal;
1849     SEGPTR gpPtr;
1850     GPHANDLERDEF *gpHandler;
1851
1852     if (    (hModule = FarGetOwner16( SELECTOROF(address) )) != 0
1853          && (gpOrdinal = NE_GetOrdinal( hModule, "__GP" )) != 0
1854          && (gpPtr = (SEGPTR)NE_GetEntryPointEx( hModule, gpOrdinal, FALSE )) != 0
1855          && !IsBadReadPtr16( gpPtr, sizeof(GPHANDLERDEF) )
1856          && (gpHandler = MapSL( gpPtr )) != NULL )
1857     {
1858         while (gpHandler->selector)
1859         {
1860             if (    SELECTOROF(address) == gpHandler->selector
1861                  && OFFSETOF(address)   >= gpHandler->rangeStart
1862                  && OFFSETOF(address)   <  gpHandler->rangeEnd  )
1863                 return MAKESEGPTR( gpHandler->selector, gpHandler->handler );
1864             gpHandler++;
1865         }
1866     }
1867
1868     return 0;
1869 }
1870