dlls/kernel32/module.c

   1 /*
   2  * Modules
   3  *
   4  * Copyright 1995 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "config.h"
  22 #include "wine/port.h"
  23
  24 #include <fcntl.h>
  25 #include <stdarg.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <sys/types.h>
  30 #ifdef HAVE_UNISTD_H
  31 # include <unistd.h>
  32 #endif
  33 #include "ntstatus.h"
  34 #define WIN32_NO_STATUS
  35 #include "winerror.h"
  36 #include "windef.h"
  37 #include "winbase.h"
  38 #include "winternl.h"
  39 #include "kernel_private.h"
  40
  41 #include "wine/exception.h"
  42 #include "wine/debug.h"
  43 #include "wine/unicode.h"
  44
  45 WINE_DEFAULT_DEBUG_CHANNEL(module);
  46
  47 #define NE_FFLAGS_LIBMODULE 0x8000
  48
  49 static WCHAR *dll_directory;  /* extra path for SetDllDirectoryW */
  50
  51 static CRITICAL_SECTION dlldir_section;
  52 static CRITICAL_SECTION_DEBUG critsect_debug =
  53 {
  54     0, 0, &dlldir_section,
  55     { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
  56       0, 0, { (DWORD_PTR)(__FILE__ ": dlldir_section") }
  57 };
  58 static CRITICAL_SECTION dlldir_section = { &critsect_debug, -1, 0, 0, 0, 0 };
  59
  60
  61 /****************************************************************************
  62  *              GetDllDirectoryA   (KERNEL32.@)
  63  */
  64 DWORD WINAPI GetDllDirectoryA( DWORD buf_len, LPSTR buffer )
  65 {
  66     DWORD len;
  67
  68     RtlEnterCriticalSection( &dlldir_section );
  69     len = dll_directory ? FILE_name_WtoA( dll_directory, strlenW(dll_directory), NULL, 0 ) : 0;
  70     if (buffer && buf_len > len)
  71     {
  72         if (dll_directory) FILE_name_WtoA( dll_directory, -1, buffer, buf_len );
  73         else *buffer = 0;
  74     }
  75     else
  76     {
  77         len++;  /* for terminating null */
  78         if (buffer) *buffer = 0;
  79     }
  80     RtlLeaveCriticalSection( &dlldir_section );
  81     return len;
  82 }
  83
  84
  85 /****************************************************************************
  86  *              GetDllDirectoryW   (KERNEL32.@)
  87  */
  88 DWORD WINAPI GetDllDirectoryW( DWORD buf_len, LPWSTR buffer )
  89 {
  90     DWORD len;
  91
  92     RtlEnterCriticalSection( &dlldir_section );
  93     len = dll_directory ? strlenW( dll_directory ) : 0;
  94     if (buffer && buf_len > len)
  95     {
  96         if (dll_directory) memcpy( buffer, dll_directory, (len + 1) * sizeof(WCHAR) );
  97         else *buffer = 0;
  98     }
  99     else
 100     {
 101         len++;  /* for terminating null */
 102         if (buffer) *buffer = 0;
 103     }
 104     RtlLeaveCriticalSection( &dlldir_section );
 105     return len;
 106 }
 107
 108
 109 /****************************************************************************
 110  *              SetDllDirectoryA   (KERNEL32.@)
 111  */
 112 BOOL WINAPI SetDllDirectoryA( LPCSTR dir )
 113 {
 114     WCHAR *dirW;
 115     BOOL ret;
 116
 117     if (!(dirW = FILE_name_AtoW( dir, TRUE ))) return FALSE;
 118     ret = SetDllDirectoryW( dirW );
 119     HeapFree( GetProcessHeap(), 0, dirW );
 120     return ret;
 121 }
 122
 123
 124 /****************************************************************************
 125  *              SetDllDirectoryW   (KERNEL32.@)
 126  */
 127 BOOL WINAPI SetDllDirectoryW( LPCWSTR dir )
 128 {
 129     WCHAR *newdir = NULL;
 130
 131     if (dir)
 132     {
 133         DWORD len = (strlenW(dir) + 1) * sizeof(WCHAR);
 134         if (!(newdir = HeapAlloc( GetProcessHeap(), 0, len )))
 135         {
 136             SetLastError( ERROR_NOT_ENOUGH_MEMORY );
 137             return FALSE;
 138         }
 139         memcpy( newdir, dir, len );
 140     }
 141
 142     RtlEnterCriticalSection( &dlldir_section );
 143     HeapFree( GetProcessHeap(), 0, dll_directory );
 144     dll_directory = newdir;
 145     RtlLeaveCriticalSection( &dlldir_section );
 146     return TRUE;
 147 }
 148
 149
 150 /****************************************************************************
 151  *              DisableThreadLibraryCalls (KERNEL32.@)
 152  *
 153  * Inform the module loader that thread notifications are not required for a dll.
 154  *
 155  * PARAMS
 156  *  hModule [I] Module handle to skip calls for
 157  *
 158  * RETURNS
 159  *  Success: TRUE. Thread attach and detach notifications will not be sent
 160  *           to hModule.
 161  *  Failure: FALSE. Use GetLastError() to determine the cause.
 162  *
 163  * NOTES
 164  *  This is typically called from the dll entry point of a dll during process
 165  *  attachment, for dlls that do not need to process thread notifications.
 166  */
 167 BOOL WINAPI DisableThreadLibraryCalls( HMODULE hModule )
 168 {
 169     NTSTATUS    nts = LdrDisableThreadCalloutsForDll( hModule );
 170     if (nts == STATUS_SUCCESS) return TRUE;
 171
 172     SetLastError( RtlNtStatusToDosError( nts ) );
 173     return FALSE;
 174 }
 175
 176
 177 /* Check whether a file is an OS/2 or a very old Windows executable
 178  * by testing on import of KERNEL.
 179  *
 180  * FIXME: is reading the module imports the only way of discerning
 181  *        old Windows binaries from OS/2 ones ? At least it seems so...
 182  */
 183 static DWORD MODULE_Decide_OS2_OldWin(HANDLE hfile, const IMAGE_DOS_HEADER *mz, const IMAGE_OS2_HEADER *ne)
 184 {
 185     DWORD currpos = SetFilePointer( hfile, 0, NULL, SEEK_CUR);
 186     DWORD ret = BINARY_OS216;
 187     LPWORD modtab = NULL;
 188     LPSTR nametab = NULL;
 189     DWORD len;
 190     int i;
 191
 192     /* read modref table */
 193     if ( (SetFilePointer( hfile, mz->e_lfanew + ne->ne_modtab, NULL, SEEK_SET ) == -1)
 194       || (!(modtab = HeapAlloc( GetProcessHeap(), 0, ne->ne_cmod*sizeof(WORD))))
 195       || (!(ReadFile(hfile, modtab, ne->ne_cmod*sizeof(WORD), &len, NULL)))
 196       || (len != ne->ne_cmod*sizeof(WORD)) )
 197         goto broken;
 198
 199     /* read imported names table */
 200     if ( (SetFilePointer( hfile, mz->e_lfanew + ne->ne_imptab, NULL, SEEK_SET ) == -1)
 201       || (!(nametab = HeapAlloc( GetProcessHeap(), 0, ne->ne_enttab - ne->ne_imptab)))
 202       || (!(ReadFile(hfile, nametab, ne->ne_enttab - ne->ne_imptab, &len, NULL)))
 203       || (len != ne->ne_enttab - ne->ne_imptab) )
 204         goto broken;
 205
 206     for (i=0; i < ne->ne_cmod; i++)
 207     {
 208         LPSTR module = &nametab[modtab[i]];
 209         TRACE("modref: %.*s\n", module[0], &module[1]);
 210         if (!(strncmp(&module[1], "KERNEL", module[0])))
 211         { /* very old Windows file */
 212             MESSAGE("This seems to be a very old (pre-3.0) Windows executable. Expect crashes, especially if this is a real-mode binary !\n");
 213             ret = BINARY_WIN16;
 214             goto good;
 215         }
 216     }
 217
 218 broken:
 219     ERR("Hmm, an error occurred. Is this binary file broken?\n");
 220
 221 good:
 222     HeapFree( GetProcessHeap(), 0, modtab);
 223     HeapFree( GetProcessHeap(), 0, nametab);
 224     SetFilePointer( hfile, currpos, NULL, SEEK_SET); /* restore filepos */
 225     return ret;
 226 }
 227
 228 /***********************************************************************
 229  *           MODULE_GetBinaryType
 230  */
 231 void MODULE_get_binary_info( HANDLE hfile, struct binary_info *info )
 232 {
 233     union
 234     {
 235         struct
 236         {
 237             unsigned char magic[4];
 238             unsigned char class;
 239             unsigned char data;
 240             unsigned char version;
 241             unsigned char ignored[9];
 242             unsigned short type;
 243             unsigned short machine;
 244         } elf;
 245         struct
 246         {
 247             unsigned int magic;
 248             unsigned int cputype;
 249             unsigned int cpusubtype;
 250             unsigned int filetype;
 251         } macho;
 252         IMAGE_DOS_HEADER mz;
 253     } header;
 254
 255     DWORD len;
 256
 257     memset( info, 0, sizeof(*info) );
 258
 259     /* Seek to the start of the file and read the header information. */
 260     if (SetFilePointer( hfile, 0, NULL, SEEK_SET ) == -1) return;
 261     if (!ReadFile( hfile, &header, sizeof(header), &len, NULL ) || len != sizeof(header)) return;
 262
 263     if (!memcmp( header.elf.magic, "\177ELF", 4 ))
 264     {
 265         if (header.elf.class == 2) info->flags |= BINARY_FLAG_64BIT;
 266         /* FIXME: we don't bother to check byte order, architecture, etc. */
 267         switch(header.elf.type)
 268         {
 269         case 2: info->type = BINARY_UNIX_EXE; break;
 270         case 3: info->type = BINARY_UNIX_LIB; break;
 271         }
 272     }
 273     /* Mach-o File with Endian set to Big Endian or Little Endian */
 274     else if (header.macho.magic == 0xfeedface || header.macho.magic == 0xcefaedfe)
 275     {
 276         if ((header.macho.cputype >> 24) == 1) info->flags |= BINARY_FLAG_64BIT;
 277         switch(header.macho.filetype)
 278         {
 279         case 2: info->type = BINARY_UNIX_EXE; break;
 280         case 8: info->type = BINARY_UNIX_LIB; break;
 281         }
 282     }
 283     /* Not ELF, try DOS */
 284     else if (header.mz.e_magic == IMAGE_DOS_SIGNATURE)
 285     {
 286         union
 287         {
 288             IMAGE_OS2_HEADER os2;
 289             IMAGE_NT_HEADERS32 nt;
 290         } ext_header;
 291
 292         /* We do have a DOS image so we will now try to seek into
 293          * the file by the amount indicated by the field
 294          * "Offset to extended header" and read in the
 295          * "magic" field information at that location.
 296          * This will tell us if there is more header information
 297          * to read or not.
 298          */
 299         info->type = BINARY_DOS;
 300         if (SetFilePointer( hfile, header.mz.e_lfanew, NULL, SEEK_SET ) == -1) return;
 301         if (!ReadFile( hfile, &ext_header, sizeof(ext_header), &len, NULL ) || len < 4) return;
 302
 303         /* Reading the magic field succeeded so
 304          * we will try to determine what type it is.
 305          */
 306         if (!memcmp( &ext_header.nt.Signature, "PE\0\0", 4 ))
 307         {
 308             if (len >= sizeof(ext_header.nt.FileHeader))
 309             {
 310                 info->type = BINARY_PE;
 311                 if (ext_header.nt.FileHeader.Characteristics & IMAGE_FILE_DLL)
 312                     info->flags |= BINARY_FLAG_DLL;
 313                 if (len < sizeof(ext_header.nt))  /* clear remaining part of header if missing */
 314                     memset( (char *)&ext_header.nt + len, 0, sizeof(ext_header.nt) - len );
 315                 switch (ext_header.nt.OptionalHeader.Magic)
 316                 {
 317                 case IMAGE_NT_OPTIONAL_HDR32_MAGIC:
 318                     info->res_start = (void *)(ULONG_PTR)ext_header.nt.OptionalHeader.ImageBase;
 319                     info->res_end = (void *)((ULONG_PTR)ext_header.nt.OptionalHeader.ImageBase +
 320                                                      ext_header.nt.OptionalHeader.SizeOfImage);
 321                     break;
 322                 case IMAGE_NT_OPTIONAL_HDR64_MAGIC:
 323                     info->flags |= BINARY_FLAG_64BIT;
 324                     break;
 325                 }
 326             }
 327         }
 328         else if (!memcmp( &ext_header.os2.ne_magic, "NE", 2 ))
 329         {
 330             /* This is a Windows executable (NE) header.  This can
 331              * mean either a 16-bit OS/2 or a 16-bit Windows or even a
 332              * DOS program (running under a DOS extender).  To decide
 333              * which, we'll have to read the NE header.
 334              */
 335             if (len >= sizeof(ext_header.os2))
 336             {
 337                 if (ext_header.os2.ne_flags & NE_FFLAGS_LIBMODULE) info->flags |= BINARY_FLAG_DLL;
 338                 switch ( ext_header.os2.ne_exetyp )
 339                 {
 340                 case 1:  info->type = BINARY_OS216; break; /* OS/2 */
 341                 case 2:  info->type = BINARY_WIN16; break; /* Windows */
 342                 case 3:  info->type = BINARY_DOS; break; /* European MS-DOS 4.x */
 343                 case 4:  info->type = BINARY_WIN16; break; /* Windows 386; FIXME: is this 32bit??? */
 344                 case 5:  info->type = BINARY_DOS; break; /* BOSS, Borland Operating System Services */
 345                 /* other types, e.g. 0 is: "unknown" */
 346                 default: info->type = MODULE_Decide_OS2_OldWin(hfile, &header.mz, &ext_header.os2); break;
 347                 }
 348             }
 349         }
 350     }
 351 }
 352
 353 /***********************************************************************
 354  *             GetBinaryTypeW                     [KERNEL32.@]
 355  *
 356  * Determine whether a file is executable, and if so, what kind.
 357  *
 358  * PARAMS
 359  *  lpApplicationName [I] Path of the file to check
 360  *  lpBinaryType      [O] Destination for the binary type
 361  *
 362  * RETURNS
 363  *  TRUE, if the file is an executable, in which case lpBinaryType is set.
 364  *  FALSE, if the file is not an executable or if the function fails.
 365  *
 366  * NOTES
 367  *  The type of executable is a property that determines which subsystem an
 368  *  executable file runs under. lpBinaryType can be set to one of the following
 369  *  values:
 370  *   SCS_32BIT_BINARY: A Win32 based application
 371  *   SCS_DOS_BINARY: An MS-Dos based application
 372  *   SCS_WOW_BINARY: A Win16 based application
 373  *   SCS_PIF_BINARY: A PIF file that executes an MS-Dos based app
 374  *   SCS_POSIX_BINARY: A POSIX based application ( Not implemented )
 375  *   SCS_OS216_BINARY: A 16bit OS/2 based application
 376  *
 377  *  To find the binary type, this function reads in the files header information.
 378  *  If extended header information is not present it will assume that the file
 379  *  is a DOS executable. If extended header information is present it will
 380  *  determine if the file is a 16 or 32 bit Windows executable by checking the
 381  *  flags in the header.
 382  *
 383  *  ".com" and ".pif" files are only recognized by their file name extension,
 384  *  as per native Windows.
 385  */
 386 BOOL WINAPI GetBinaryTypeW( LPCWSTR lpApplicationName, LPDWORD lpBinaryType )
 387 {
 388     BOOL ret = FALSE;
 389     HANDLE hfile;
 390     struct binary_info binary_info;
 391
 392     TRACE("%s\n", debugstr_w(lpApplicationName) );
 393
 394     /* Sanity check.
 395      */
 396     if ( lpApplicationName == NULL || lpBinaryType == NULL )
 397         return FALSE;
 398
 399     /* Open the file indicated by lpApplicationName for reading.
 400      */
 401     hfile = CreateFileW( lpApplicationName, GENERIC_READ, FILE_SHARE_READ,
 402                          NULL, OPEN_EXISTING, 0, 0 );
 403     if ( hfile == INVALID_HANDLE_VALUE )
 404         return FALSE;
 405
 406     /* Check binary type
 407      */
 408     MODULE_get_binary_info( hfile, &binary_info );
 409     switch (binary_info.type)
 410     {
 411     case BINARY_UNKNOWN:
 412     {
 413         static const WCHAR comW[] = { '.','C','O','M',0 };
 414         static const WCHAR pifW[] = { '.','P','I','F',0 };
 415         const WCHAR *ptr;
 416
 417         /* try to determine from file name */
 418         ptr = strrchrW( lpApplicationName, '.' );
 419         if (!ptr) break;
 420         if (!strcmpiW( ptr, comW ))
 421         {
 422             *lpBinaryType = SCS_DOS_BINARY;
 423             ret = TRUE;
 424         }
 425         else if (!strcmpiW( ptr, pifW ))
 426         {
 427             *lpBinaryType = SCS_PIF_BINARY;
 428             ret = TRUE;
 429         }
 430         break;
 431     }
 432     case BINARY_PE:
 433         *lpBinaryType = (binary_info.flags & BINARY_FLAG_64BIT) ? SCS_64BIT_BINARY : SCS_32BIT_BINARY;
 434         ret = TRUE;
 435         break;
 436     case BINARY_WIN16:
 437         *lpBinaryType = SCS_WOW_BINARY;
 438         ret = TRUE;
 439         break;
 440     case BINARY_OS216:
 441         *lpBinaryType = SCS_OS216_BINARY;
 442         ret = TRUE;
 443         break;
 444     case BINARY_DOS:
 445         *lpBinaryType = SCS_DOS_BINARY;
 446         ret = TRUE;
 447         break;
 448     case BINARY_UNIX_EXE:
 449     case BINARY_UNIX_LIB:
 450         ret = FALSE;
 451         break;
 452     }
 453
 454     CloseHandle( hfile );
 455     return ret;
 456 }
 457
 458 /***********************************************************************
 459  *             GetBinaryTypeA                     [KERNEL32.@]
 460  *             GetBinaryType                      [KERNEL32.@]
 461  *
 462  * See GetBinaryTypeW.
 463  */
 464 BOOL WINAPI GetBinaryTypeA( LPCSTR lpApplicationName, LPDWORD lpBinaryType )
 465 {
 466     ANSI_STRING app_nameA;
 467     NTSTATUS status;
 468
 469     TRACE("%s\n", debugstr_a(lpApplicationName));
 470
 471     /* Sanity check.
 472      */
 473     if ( lpApplicationName == NULL || lpBinaryType == NULL )
 474         return FALSE;
 475
 476     RtlInitAnsiString(&app_nameA, lpApplicationName);
 477     status = RtlAnsiStringToUnicodeString(&NtCurrentTeb()->StaticUnicodeString,
 478                                           &app_nameA, FALSE);
 479     if (!status)
 480         return GetBinaryTypeW(NtCurrentTeb()->StaticUnicodeString.Buffer, lpBinaryType);
 481
 482     SetLastError(RtlNtStatusToDosError(status));
 483     return FALSE;
 484 }
 485
 486 /***********************************************************************
 487  *              GetModuleHandleExA         (KERNEL32.@)
 488  */
 489 BOOL WINAPI GetModuleHandleExA( DWORD flags, LPCSTR name, HMODULE *module )
 490 {
 491     WCHAR *nameW;
 492
 493     if (!name || (flags & GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS))
 494         return GetModuleHandleExW( flags, (LPCWSTR)name, module );
 495
 496     if (!(nameW = FILE_name_AtoW( name, FALSE ))) return FALSE;
 497     return GetModuleHandleExW( flags, nameW, module );
 498 }
 499
 500 /***********************************************************************
 501  *              GetModuleHandleExW         (KERNEL32.@)
 502  */
 503 BOOL WINAPI GetModuleHandleExW( DWORD flags, LPCWSTR name, HMODULE *module )
 504 {
 505     NTSTATUS status = STATUS_SUCCESS;
 506     HMODULE ret;
 507     ULONG magic;
 508
 509     /* if we are messing with the refcount, grab the loader lock */
 510     if ((flags & GET_MODULE_HANDLE_EX_FLAG_PIN) ||
 511         !(flags & GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT))
 512         LdrLockLoaderLock( 0, NULL, &magic );
 513
 514     if (!name)
 515     {
 516         ret = NtCurrentTeb()->Peb->ImageBaseAddress;
 517     }
 518     else if (flags & GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS)
 519     {
 520         void *dummy;
 521         if (!(ret = RtlPcToFileHeader( (void *)name, &dummy ))) status = STATUS_DLL_NOT_FOUND;
 522     }
 523     else
 524     {
 525         UNICODE_STRING wstr;
 526         RtlInitUnicodeString( &wstr, name );
 527         status = LdrGetDllHandle( NULL, 0, &wstr, &ret );
 528     }
 529
 530     if (status == STATUS_SUCCESS)
 531     {
 532         if (flags & GET_MODULE_HANDLE_EX_FLAG_PIN)
 533             FIXME( "should pin refcount for %p\n", ret );
 534         else if (!(flags & GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT))
 535             LdrAddRefDll( 0, ret );
 536     }
 537     else SetLastError( RtlNtStatusToDosError( status ) );
 538
 539     if ((flags & GET_MODULE_HANDLE_EX_FLAG_PIN) ||
 540         !(flags & GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT))
 541         LdrUnlockLoaderLock( 0, magic );
 542
 543     if (module) *module = ret;
 544     return (status == STATUS_SUCCESS);
 545 }
 546
 547 /***********************************************************************
 548  *              GetModuleHandleA         (KERNEL32.@)
 549  *
 550  * Get the handle of a dll loaded into the process address space.
 551  *
 552  * PARAMS
 553  *  module [I] Name of the dll
 554  *
 555  * RETURNS
 556  *  Success: A handle to the loaded dll.
 557  *  Failure: A NULL handle. Use GetLastError() to determine the cause.
 558  */
 559 HMODULE WINAPI GetModuleHandleA(LPCSTR module)
 560 {
 561     HMODULE ret;
 562
 563     if (!GetModuleHandleExA( GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT, module, &ret )) ret = 0;
 564     return ret;
 565 }
 566
 567 /***********************************************************************
 568  *              GetModuleHandleW (KERNEL32.@)
 569  *
 570  * Unicode version of GetModuleHandleA.
 571  */
 572 HMODULE WINAPI GetModuleHandleW(LPCWSTR module)
 573 {
 574     HMODULE ret;
 575
 576     if (!GetModuleHandleExW( GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT, module, &ret )) ret = 0;
 577     return ret;
 578 }
 579
 580
 581 /***********************************************************************
 582  *              GetModuleFileNameA      (KERNEL32.@)
 583  *
 584  * Get the file name of a loaded module from its handle.
 585  *
 586  * RETURNS
 587  *  Success: The length of the file name, excluding the terminating NUL.
 588  *  Failure: 0. Use GetLastError() to determine the cause.
 589  *
 590  * NOTES
 591  *  This function always returns the long path of hModule (as opposed to
 592  *  GetModuleFileName16() which returns short paths when the modules version
 593  *  field is < 4.0).
 594  *  The function doesn't write a terminating '\0' if the buffer is too
 595  *  small.
 596  */
 597 DWORD WINAPI GetModuleFileNameA(
 598         HMODULE hModule,        /* [in] Module handle (32 bit) */
 599         LPSTR lpFileName,       /* [out] Destination for file name */
 600         DWORD size )            /* [in] Size of lpFileName in characters */
 601 {
 602     LPWSTR filenameW = HeapAlloc( GetProcessHeap(), 0, size * sizeof(WCHAR) );
 603     DWORD len;
 604
 605     if (!filenameW)
 606     {
 607         SetLastError( ERROR_NOT_ENOUGH_MEMORY );
 608         return 0;
 609     }
 610     if ((len = GetModuleFileNameW( hModule, filenameW, size )))
 611     {
 612         len = FILE_name_WtoA( filenameW, len, lpFileName, size );
 613         if (len < size)
 614             lpFileName[len] = '\0';
 615         else
 616             SetLastError( ERROR_INSUFFICIENT_BUFFER );
 617     }
 618     HeapFree( GetProcessHeap(), 0, filenameW );
 619     return len;
 620 }
 621
 622 /***********************************************************************
 623  *              GetModuleFileNameW      (KERNEL32.@)
 624  *
 625  * Unicode version of GetModuleFileNameA.
 626  */
 627 DWORD WINAPI GetModuleFileNameW( HMODULE hModule, LPWSTR lpFileName, DWORD size )
 628 {
 629     ULONG magic, len = 0;
 630     LDR_MODULE *pldr;
 631     NTSTATUS nts;
 632     WIN16_SUBSYSTEM_TIB *win16_tib;
 633
 634     if (!hModule && ((win16_tib = NtCurrentTeb()->Tib.SubSystemTib)) && win16_tib->exe_name)
 635     {
 636         len = min(size, win16_tib->exe_name->Length / sizeof(WCHAR));
 637         memcpy( lpFileName, win16_tib->exe_name->Buffer, len * sizeof(WCHAR) );
 638         if (len < size) lpFileName[len] = '\0';
 639         goto done;
 640     }
 641
 642     LdrLockLoaderLock( 0, NULL, &magic );
 643
 644     if (!hModule) hModule = NtCurrentTeb()->Peb->ImageBaseAddress;
 645     nts = LdrFindEntryForAddress( hModule, &pldr );
 646     if (nts == STATUS_SUCCESS)
 647     {
 648         len = min(size, pldr->FullDllName.Length / sizeof(WCHAR));
 649         memcpy(lpFileName, pldr->FullDllName.Buffer, len * sizeof(WCHAR));
 650         if (len < size)
 651             lpFileName[len] = '\0';
 652         else
 653             SetLastError( ERROR_INSUFFICIENT_BUFFER );
 654     }
 655     else SetLastError( RtlNtStatusToDosError( nts ) );
 656
 657     LdrUnlockLoaderLock( 0, magic );
 658 done:
 659     TRACE( "%s\n", debugstr_wn(lpFileName, len) );
 660     return len;
 661 }
 662
 663
 664 /***********************************************************************
 665  *           get_dll_system_path
 666  */
 667 static const WCHAR *get_dll_system_path(void)
 668 {
 669     static WCHAR *cached_path;
 670
 671     if (!cached_path)
 672     {
 673         WCHAR *p, *path;
 674         int len = 3;
 675
 676         len += 2 * GetSystemDirectoryW( NULL, 0 );
 677         len += GetWindowsDirectoryW( NULL, 0 );
 678         p = path = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) );
 679         *p++ = '.';
 680         *p++ = ';';
 681         GetSystemDirectoryW( p, path + len - p);
 682         p += strlenW(p);
 683         /* if system directory ends in "32" add 16-bit version too */
 684         if (p[-2] == '3' && p[-1] == '2')
 685         {
 686             *p++ = ';';
 687             GetSystemDirectoryW( p, path + len - p);
 688             p += strlenW(p) - 2;
 689         }
 690         *p++ = ';';
 691         GetWindowsDirectoryW( p, path + len - p);
 692         cached_path = path;
 693     }
 694     return cached_path;
 695 }
 696
 697 /******************************************************************
 698  *              get_module_path_end
 699  *
 700  * Returns the end of the directory component of the module path.
 701  */
 702 static inline const WCHAR *get_module_path_end(const WCHAR *module)
 703 {
 704     const WCHAR *p;
 705     const WCHAR *mod_end = module;
 706     if (!module) return mod_end;
 707
 708     if ((p = strrchrW( mod_end, '\\' ))) mod_end = p;
 709     if ((p = strrchrW( mod_end, '/' ))) mod_end = p;
 710     if (mod_end == module + 2 && module[1] == ':') mod_end++;
 711     if (mod_end == module && module[0] && module[1] == ':') mod_end += 2;
 712
 713     return mod_end;
 714 }
 715
 716 /******************************************************************
 717  *              MODULE_get_dll_load_path
 718  *
 719  * Compute the load path to use for a given dll.
 720  * Returned pointer must be freed by caller.
 721  */
 722 WCHAR *MODULE_get_dll_load_path( LPCWSTR module )
 723 {
 724     static const WCHAR pathW[] = {'P','A','T','H',0};
 725
 726     const WCHAR *system_path = get_dll_system_path();
 727     const WCHAR *mod_end = NULL;
 728     UNICODE_STRING name, value;
 729     WCHAR *p, *ret;
 730     int len = 0, path_len = 0;
 731
 732     /* adjust length for module name */
 733
 734     if (module)
 735         mod_end = get_module_path_end( module );
 736     /* if module is NULL or doesn't contain a path, fall back to directory
 737      * process was loaded from */
 738     if (module == mod_end)
 739     {
 740         module = NtCurrentTeb()->Peb->ProcessParameters->ImagePathName.Buffer;
 741         mod_end = get_module_path_end( module );
 742     }
 743     len += (mod_end - module) + 1;
 744
 745     len += strlenW( system_path ) + 2;
 746
 747     /* get the PATH variable */
 748
 749     RtlInitUnicodeString( &name, pathW );
 750     value.Length = 0;
 751     value.MaximumLength = 0;
 752     value.Buffer = NULL;
 753     if (RtlQueryEnvironmentVariable_U( NULL, &name, &value ) == STATUS_BUFFER_TOO_SMALL)
 754         path_len = value.Length;
 755
 756     RtlEnterCriticalSection( &dlldir_section );
 757     if (dll_directory) len += strlenW(dll_directory) + 1;
 758     if ((p = ret = HeapAlloc( GetProcessHeap(), 0, path_len + len * sizeof(WCHAR) )))
 759     {
 760         if (module)
 761         {
 762             memcpy( ret, module, (mod_end - module) * sizeof(WCHAR) );
 763             p += (mod_end - module);
 764             *p++ = ';';
 765         }
 766         if (dll_directory)
 767         {
 768             strcpyW( p, dll_directory );
 769             p += strlenW(p);
 770             *p++ = ';';
 771         }
 772     }
 773     RtlLeaveCriticalSection( &dlldir_section );
 774     if (!ret) return NULL;
 775
 776     strcpyW( p, system_path );
 777     p += strlenW(p);
 778     *p++ = ';';
 779     value.Buffer = p;
 780     value.MaximumLength = path_len;
 781
 782     while (RtlQueryEnvironmentVariable_U( NULL, &name, &value ) == STATUS_BUFFER_TOO_SMALL)
 783     {
 784         WCHAR *new_ptr;
 785
 786         /* grow the buffer and retry */
 787         path_len = value.Length;
 788         if (!(new_ptr = HeapReAlloc( GetProcessHeap(), 0, ret, path_len + len * sizeof(WCHAR) )))
 789         {
 790             HeapFree( GetProcessHeap(), 0, ret );
 791             return NULL;
 792         }
 793         value.Buffer = new_ptr + (value.Buffer - ret);
 794         value.MaximumLength = path_len;
 795         ret = new_ptr;
 796     }
 797     value.Buffer[value.Length / sizeof(WCHAR)] = 0;
 798     return ret;
 799 }
 800
 801
 802 /******************************************************************
 803  *              load_library_as_datafile
 804  */
 805 static BOOL load_library_as_datafile( LPCWSTR name, HMODULE* hmod)
 806 {
 807     static const WCHAR dotDLL[] = {'.','d','l','l',0};
 808
 809     WCHAR filenameW[MAX_PATH];
 810     HANDLE hFile = INVALID_HANDLE_VALUE;
 811     HANDLE mapping;
 812     HMODULE module;
 813
 814     *hmod = 0;
 815
 816     if (SearchPathW( NULL, name, dotDLL, sizeof(filenameW) / sizeof(filenameW[0]),
 817                      filenameW, NULL ))
 818     {
 819         hFile = CreateFileW( filenameW, GENERIC_READ, FILE_SHARE_READ,
 820                              NULL, OPEN_EXISTING, 0, 0 );
 821     }
 822     if (hFile == INVALID_HANDLE_VALUE) return FALSE;
 823
 824     mapping = CreateFileMappingW( hFile, NULL, PAGE_READONLY, 0, 0, NULL );
 825     CloseHandle( hFile );
 826     if (!mapping) return FALSE;
 827
 828     module = MapViewOfFile( mapping, FILE_MAP_READ, 0, 0, 0 );
 829     CloseHandle( mapping );
 830     if (!module) return FALSE;
 831
 832     /* make sure it's a valid PE file */
 833     if (!RtlImageNtHeader(module))
 834     {
 835         UnmapViewOfFile( module );
 836         return FALSE;
 837     }
 838     *hmod = (HMODULE)((char *)module + 1);  /* set low bit of handle to indicate datafile module */
 839     return TRUE;
 840 }
 841
 842
 843 /******************************************************************
 844  *              load_library
 845  *
 846  * Helper for LoadLibraryExA/W.
 847  */
 848 static HMODULE load_library( const UNICODE_STRING *libname, DWORD flags )
 849 {
 850     NTSTATUS nts;
 851     HMODULE hModule;
 852     WCHAR *load_path;
 853
 854     load_path = MODULE_get_dll_load_path( flags & LOAD_WITH_ALTERED_SEARCH_PATH ? libname->Buffer : NULL );
 855
 856     if (flags & LOAD_LIBRARY_AS_DATAFILE)
 857     {
 858         ULONG magic;
 859
 860         LdrLockLoaderLock( 0, NULL, &magic );
 861         if (!(nts = LdrGetDllHandle( load_path, flags, libname, &hModule )))
 862         {
 863             LdrAddRefDll( 0, hModule );
 864             LdrUnlockLoaderLock( 0, magic );
 865             goto done;
 866         }
 867         LdrUnlockLoaderLock( 0, magic );
 868
 869         /* The method in load_library_as_datafile allows searching for the
 870          * 'native' libraries only
 871          */
 872         if (load_library_as_datafile( libname->Buffer, &hModule )) goto done;
 873         flags |= DONT_RESOLVE_DLL_REFERENCES; /* Just in case */
 874         /* Fallback to normal behaviour */
 875     }
 876
 877     nts = LdrLoadDll( load_path, flags, libname, &hModule );
 878     if (nts != STATUS_SUCCESS)
 879     {
 880         hModule = 0;
 881         SetLastError( RtlNtStatusToDosError( nts ) );
 882     }
 883 done:
 884     HeapFree( GetProcessHeap(), 0, load_path );
 885     return hModule;
 886 }
 887
 888
 889 /******************************************************************
 890  *              LoadLibraryExA          (KERNEL32.@)
 891  *
 892  * Load a dll file into the process address space.
 893  *
 894  * PARAMS
 895  *  libname [I] Name of the file to load
 896  *  hfile   [I] Reserved, must be 0.
 897  *  flags   [I] Flags for loading the dll
 898  *
 899  * RETURNS
 900  *  Success: A handle to the loaded dll.
 901  *  Failure: A NULL handle. Use GetLastError() to determine the cause.
 902  *
 903  * NOTES
 904  * The HFILE parameter is not used and marked reserved in the SDK. I can
 905  * only guess that it should force a file to be mapped, but I rather
 906  * ignore the parameter because it would be extremely difficult to
 907  * integrate this with different types of module representations.
 908  */
 909 HMODULE WINAPI DECLSPEC_HOTPATCH LoadLibraryExA(LPCSTR libname, HANDLE hfile, DWORD flags)
 910 {
 911     WCHAR *libnameW;
 912
 913     if (!(libnameW = FILE_name_AtoW( libname, FALSE ))) return 0;
 914     return LoadLibraryExW( libnameW, hfile, flags );
 915 }
 916
 917 /***********************************************************************
 918  *           LoadLibraryExW       (KERNEL32.@)
 919  *
 920  * Unicode version of LoadLibraryExA.
 921  */
 922 HMODULE WINAPI DECLSPEC_HOTPATCH LoadLibraryExW(LPCWSTR libnameW, HANDLE hfile, DWORD flags)
 923 {
 924     UNICODE_STRING      wstr;
 925     HMODULE             res;
 926
 927     if (!libnameW)
 928     {
 929         SetLastError(ERROR_INVALID_PARAMETER);
 930         return 0;
 931     }
 932     RtlInitUnicodeString( &wstr, libnameW );
 933     if (wstr.Buffer[wstr.Length/sizeof(WCHAR) - 1] != ' ')
 934         return load_library( &wstr, flags );
 935
 936     /* Library name has trailing spaces */
 937     RtlCreateUnicodeString( &wstr, libnameW );
 938     while (wstr.Length > sizeof(WCHAR) &&
 939            wstr.Buffer[wstr.Length/sizeof(WCHAR) - 1] == ' ')
 940     {
 941         wstr.Length -= sizeof(WCHAR);
 942     }
 943     wstr.Buffer[wstr.Length/sizeof(WCHAR)] = '\0';
 944     res = load_library( &wstr, flags );
 945     RtlFreeUnicodeString( &wstr );
 946     return res;
 947 }
 948
 949 /***********************************************************************
 950  *           LoadLibraryA         (KERNEL32.@)
 951  *
 952  * Load a dll file into the process address space.
 953  *
 954  * PARAMS
 955  *  libname [I] Name of the file to load
 956  *
 957  * RETURNS
 958  *  Success: A handle to the loaded dll.
 959  *  Failure: A NULL handle. Use GetLastError() to determine the cause.
 960  *
 961  * NOTES
 962  * See LoadLibraryExA().
 963  */
 964 HMODULE WINAPI DECLSPEC_HOTPATCH LoadLibraryA(LPCSTR libname)
 965 {
 966     return LoadLibraryExA(libname, 0, 0);
 967 }
 968
 969 /***********************************************************************
 970  *           LoadLibraryW         (KERNEL32.@)
 971  *
 972  * Unicode version of LoadLibraryA.
 973  */
 974 HMODULE WINAPI DECLSPEC_HOTPATCH LoadLibraryW(LPCWSTR libnameW)
 975 {
 976     return LoadLibraryExW(libnameW, 0, 0);
 977 }
 978
 979 /***********************************************************************
 980  *           FreeLibrary   (KERNEL32.@)
 981  *
 982  * Free a dll loaded into the process address space.
 983  *
 984  * PARAMS
 985  *  hLibModule [I] Handle to the dll returned by LoadLibraryA().
 986  *
 987  * RETURNS
 988  *  Success: TRUE. The dll is removed if it is not still in use.
 989  *  Failure: FALSE. Use GetLastError() to determine the cause.
 990  */
 991 BOOL WINAPI DECLSPEC_HOTPATCH FreeLibrary(HINSTANCE hLibModule)
 992 {
 993     BOOL                retv = FALSE;
 994     NTSTATUS            nts;
 995
 996     if (!hLibModule)
 997     {
 998         SetLastError( ERROR_INVALID_HANDLE );
 999         return FALSE;
1000     }
1001
1002     if ((ULONG_PTR)hLibModule & 1)
1003     {
1004         /* this is a LOAD_LIBRARY_AS_DATAFILE module */
1005         char *ptr = (char *)hLibModule - 1;
1006         return UnmapViewOfFile( ptr );
1007     }
1008
1009     if ((nts = LdrUnloadDll( hLibModule )) == STATUS_SUCCESS) retv = TRUE;
1010     else SetLastError( RtlNtStatusToDosError( nts ) );
1011
1012     return retv;
1013 }
1014
1015 /***********************************************************************
1016  *           GetProcAddress             (KERNEL32.@)
1017  *
1018  * Find the address of an exported symbol in a loaded dll.
1019  *
1020  * PARAMS
1021  *  hModule  [I] Handle to the dll returned by LoadLibraryA().
1022  *  function [I] Name of the symbol, or an integer ordinal number < 16384
1023  *
1024  * RETURNS
1025  *  Success: A pointer to the symbol in the process address space.
1026  *  Failure: NULL. Use GetLastError() to determine the cause.
1027  */
1028 FARPROC WINAPI GetProcAddress( HMODULE hModule, LPCSTR function )
1029 {
1030     NTSTATUS    nts;
1031     FARPROC     fp;
1032
1033     if (!hModule) hModule = NtCurrentTeb()->Peb->ImageBaseAddress;
1034
1035     if ((ULONG_PTR)function >> 16)
1036     {
1037         ANSI_STRING     str;
1038
1039         RtlInitAnsiString( &str, function );
1040         nts = LdrGetProcedureAddress( hModule, &str, 0, (void**)&fp );
1041     }
1042     else
1043         nts = LdrGetProcedureAddress( hModule, NULL, LOWORD(function), (void**)&fp );
1044     if (nts != STATUS_SUCCESS)
1045     {
1046         SetLastError( RtlNtStatusToDosError( nts ) );
1047         fp = NULL;
1048     }
1049     return fp;
1050 }
1051
1052 /***********************************************************************
1053  *           DelayLoadFailureHook  (KERNEL32.@)
1054  */
1055 FARPROC WINAPI DelayLoadFailureHook( LPCSTR name, LPCSTR function )
1056 {
1057     ULONG_PTR args[2];
1058
1059     if ((ULONG_PTR)function >> 16)
1060         ERR( "failed to delay load %s.%s\n", name, function );
1061     else
1062         ERR( "failed to delay load %s.%u\n", name, LOWORD(function) );
1063     args[0] = (ULONG_PTR)name;
1064     args[1] = (ULONG_PTR)function;
1065     RaiseException( EXCEPTION_WINE_STUB, EH_NONCONTINUABLE, 2, args );
1066     return NULL;
1067 }
1068
1069
1070 #ifdef __i386__
1071
1072 /***********************************************************************
1073  *           __wine_dll_register_16 (KERNEL32.@)
1074  *
1075  * No longer used.
1076  */
1077 void __wine_dll_register_16( const IMAGE_DOS_HEADER *header, const char *file_name )
1078 {
1079     ERR( "loading old style 16-bit dll %s no longer supported\n", file_name );
1080 }
1081
1082
1083 /***********************************************************************
1084  *           __wine_dll_unregister_16 (KERNEL32.@)
1085  *
1086  * No longer used.
1087  */
1088 void __wine_dll_unregister_16( const IMAGE_DOS_HEADER *header )
1089 {
1090 }
1091
1092 #endif