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 <stdio.h>
26 #include <stdlib.h>
27 #include <string.h>
28 #include <sys/types.h>
29 #ifdef HAVE_UNISTD_H
30 # include <unistd.h>
31 #endif
32 #include "ntstatus.h"
33 #define WIN32_NO_STATUS
34 #include "wine/winbase16.h"
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 static WCHAR *dll_directory; /* extra path for SetDllDirectoryW */
48
49 static CRITICAL_SECTION dlldir_section;
50 static CRITICAL_SECTION_DEBUG critsect_debug =
51 {
52 0, 0, &dlldir_section,
53 { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
54 0, 0, { (DWORD_PTR)(__FILE__ ": dlldir_section") }
55 };
56 static CRITICAL_SECTION dlldir_section = { &critsect_debug, -1, 0, 0, 0, 0 };
57
58
59 /****************************************************************************
60 * GetDllDirectoryA (KERNEL32.@)
61 */
62 DWORD WINAPI GetDllDirectoryA( DWORD buf_len, LPSTR buffer )
63 {
64 DWORD len;
65
66 RtlEnterCriticalSection( &dlldir_section );
67 len = dll_directory ? FILE_name_WtoA( dll_directory, strlenW(dll_directory), NULL, 0 ) : 0;
68 if (buffer && buf_len > len)
69 {
70 if (dll_directory) FILE_name_WtoA( dll_directory, -1, buffer, buf_len );
71 else *buffer = 0;
72 }
73 else
74 {
75 len++; /* for terminating null */
76 if (buffer) *buffer = 0;
77 }
78 RtlLeaveCriticalSection( &dlldir_section );
79 return len;
80 }
81
82
83 /****************************************************************************
84 * GetDllDirectoryW (KERNEL32.@)
85 */
86 DWORD WINAPI GetDllDirectoryW( DWORD buf_len, LPWSTR buffer )
87 {
88 DWORD len;
89
90 RtlEnterCriticalSection( &dlldir_section );
91 len = dll_directory ? strlenW( dll_directory ) : 0;
92 if (buffer && buf_len > len)
93 {
94 if (dll_directory) memcpy( buffer, dll_directory, (len + 1) * sizeof(WCHAR) );
95 else *buffer = 0;
96 }
97 else
98 {
99 len++; /* for terminating null */
100 if (buffer) *buffer = 0;
101 }
102 RtlLeaveCriticalSection( &dlldir_section );
103 return len;
104 }
105
106
107 /****************************************************************************
108 * SetDllDirectoryA (KERNEL32.@)
109 */
110 BOOL WINAPI SetDllDirectoryA( LPCSTR dir )
111 {
112 WCHAR *dirW;
113 BOOL ret;
114
115 if (!(dirW = FILE_name_AtoW( dir, TRUE ))) return FALSE;
116 ret = SetDllDirectoryW( dirW );
117 HeapFree( GetProcessHeap(), 0, dirW );
118 return ret;
119 }
120
121
122 /****************************************************************************
123 * SetDllDirectoryW (KERNEL32.@)
124 */
125 BOOL WINAPI SetDllDirectoryW( LPCWSTR dir )
126 {
127 WCHAR *newdir = NULL;
128
129 if (dir)
130 {
131 DWORD len = (strlenW(dir) + 1) * sizeof(WCHAR);
132 if (!(newdir = HeapAlloc( GetProcessHeap(), 0, len )))
133 {
134 SetLastError( ERROR_NOT_ENOUGH_MEMORY );
135 return FALSE;
136 }
137 memcpy( newdir, dir, len );
138 }
139
140 RtlEnterCriticalSection( &dlldir_section );
141 HeapFree( GetProcessHeap(), 0, dll_directory );
142 dll_directory = newdir;
143 RtlLeaveCriticalSection( &dlldir_section );
144 return TRUE;
145 }
146
147
148 /****************************************************************************
149 * DisableThreadLibraryCalls (KERNEL32.@)
150 *
151 * Inform the module loader that thread notifications are not required for a dll.
152 *
153 * PARAMS
154 * hModule [I] Module handle to skip calls for
155 *
156 * RETURNS
157 * Success: TRUE. Thread attach and detach notifications will not be sent
158 * to hModule.
159 * Failure: FALSE. Use GetLastError() to determine the cause.
160 *
161 * NOTES
162 * This is typically called from the dll entry point of a dll during process
163 * attachment, for dlls that do not need to process thread notifications.
164 */
165 BOOL WINAPI DisableThreadLibraryCalls( HMODULE hModule )
166 {
167 NTSTATUS nts = LdrDisableThreadCalloutsForDll( hModule );
168 if (nts == STATUS_SUCCESS) return TRUE;
169
170 SetLastError( RtlNtStatusToDosError( nts ) );
171 return FALSE;
172 }
173
174
175 /* Check whether a file is an OS/2 or a very old Windows executable
176 * by testing on import of KERNEL.
177 *
178 * FIXME: is reading the module imports the only way of discerning
179 * old Windows binaries from OS/2 ones ? At least it seems so...
180 */
181 static DWORD MODULE_Decide_OS2_OldWin(HANDLE hfile, const IMAGE_DOS_HEADER *mz, const IMAGE_OS2_HEADER *ne)
182 {
183 DWORD currpos = SetFilePointer( hfile, 0, NULL, SEEK_CUR);
184 DWORD ret = BINARY_OS216;
185 LPWORD modtab = NULL;
186 LPSTR nametab = NULL;
187 DWORD len;
188 int i;
189
190 /* read modref table */
191 if ( (SetFilePointer( hfile, mz->e_lfanew + ne->ne_modtab, NULL, SEEK_SET ) == -1)
192 || (!(modtab = HeapAlloc( GetProcessHeap(), 0, ne->ne_cmod*sizeof(WORD))))
193 || (!(ReadFile(hfile, modtab, ne->ne_cmod*sizeof(WORD), &len, NULL)))
194 || (len != ne->ne_cmod*sizeof(WORD)) )
195 goto broken;
196
197 /* read imported names table */
198 if ( (SetFilePointer( hfile, mz->e_lfanew + ne->ne_imptab, NULL, SEEK_SET ) == -1)
199 || (!(nametab = HeapAlloc( GetProcessHeap(), 0, ne->ne_enttab - ne->ne_imptab)))
200 || (!(ReadFile(hfile, nametab, ne->ne_enttab - ne->ne_imptab, &len, NULL)))
201 || (len != ne->ne_enttab - ne->ne_imptab) )
202 goto broken;
203
204 for (i=0; i < ne->ne_cmod; i++)
205 {
206 LPSTR module = &nametab[modtab[i]];
207 TRACE("modref: %.*s\n", module[0], &module[1]);
208 if (!(strncmp(&module[1], "KERNEL", module[0])))
209 { /* very old Windows file */
210 MESSAGE("This seems to be a very old (pre-3.0) Windows executable. Expect crashes, especially if this is a real-mode binary !\n");
211 ret = BINARY_WIN16;
212 goto good;
213 }
214 }
215
216 broken:
217 ERR("Hmm, an error occurred. Is this binary file broken?\n");
218
219 good:
220 HeapFree( GetProcessHeap(), 0, modtab);
221 HeapFree( GetProcessHeap(), 0, nametab);
222 SetFilePointer( hfile, currpos, NULL, SEEK_SET); /* restore filepos */
223 return ret;
224 }
225
226 /***********************************************************************
227 * MODULE_GetBinaryType
228 */
229 DWORD MODULE_GetBinaryType( HANDLE hfile, void **res_start, void **res_end )
230 {
231 union
232 {
233 struct
234 {
235 unsigned char magic[4];
236 unsigned char class;
237 unsigned char data;
238 unsigned char version;
239 unsigned char ignored[9];
240 unsigned short type;
241 unsigned short machine;
242 } elf;
243 struct
244 {
245 unsigned int magic;
246 unsigned int cputype;
247 unsigned int cpusubtype;
248 unsigned int filetype;
249 } macho;
250 IMAGE_DOS_HEADER mz;
251 } header;
252
253 DWORD len;
254
255 /* Seek to the start of the file and read the header information. */
256 if (SetFilePointer( hfile, 0, NULL, SEEK_SET ) == -1)
257 return BINARY_UNKNOWN;
258 if (!ReadFile( hfile, &header, sizeof(header), &len, NULL ) || len != sizeof(header))
259 return BINARY_UNKNOWN;
260
261 if (!memcmp( header.elf.magic, "\177ELF", 4 ))
262 {
263 DWORD flags = (header.elf.class == 2) ? BINARY_FLAG_64BIT : 0;
264 /* FIXME: we don't bother to check byte order, architecture, etc. */
265 switch(header.elf.type)
266 {
267 case 2: return flags | BINARY_UNIX_EXE;
268 case 3: return flags | BINARY_UNIX_LIB;
269 }
270 return BINARY_UNKNOWN;
271 }
272
273 /* Mach-o File with Endian set to Big Endian or Little Endian */
274 if (header.macho.magic == 0xfeedface || header.macho.magic == 0xcefaedfe)
275 {
276 DWORD flags = (header.macho.cputype >> 24) == 1 ? BINARY_FLAG_64BIT : 0;
277 switch(header.macho.filetype)
278 {
279 case 2: return flags | BINARY_UNIX_EXE;
280 case 8: return flags | BINARY_UNIX_LIB;
281 }
282 return BINARY_UNKNOWN;
283 }
284
285 /* Not ELF, try DOS */
286
287 if (header.mz.e_magic == IMAGE_DOS_SIGNATURE)
288 {
289 union
290 {
291 IMAGE_OS2_HEADER os2;
292 IMAGE_NT_HEADERS32 nt;
293 } ext_header;
294
295 /* We do have a DOS image so we will now try to seek into
296 * the file by the amount indicated by the field
297 * "Offset to extended header" and read in the
298 * "magic" field information at that location.
299 * This will tell us if there is more header information
300 * to read or not.
301 */
302 if (SetFilePointer( hfile, header.mz.e_lfanew, NULL, SEEK_SET ) == -1)
303 return BINARY_DOS;
304 if (!ReadFile( hfile, &ext_header, sizeof(ext_header), &len, NULL ) || len < 4)
305 return BINARY_DOS;
306
307 /* Reading the magic field succeeded so
308 * we will try to determine what type it is.
309 */
310 if (!memcmp( &ext_header.nt.Signature, "PE\0\0", 4 ))
311 {
312 if (len >= sizeof(ext_header.nt.FileHeader))
313 {
314 DWORD ret = BINARY_PE;
315 if (ext_header.nt.FileHeader.Characteristics & IMAGE_FILE_DLL) ret |= BINARY_FLAG_DLL;
316 if (len < sizeof(ext_header.nt)) /* clear remaining part of header if missing */
317 memset( (char *)&ext_header.nt + len, 0, sizeof(ext_header.nt) - len );
318 switch (ext_header.nt.OptionalHeader.Magic)
319 {
320 case IMAGE_NT_OPTIONAL_HDR32_MAGIC:
321 if (res_start) *res_start = (void *)(ULONG_PTR)ext_header.nt.OptionalHeader.ImageBase;
322 if (res_end) *res_end = (void *)((ULONG_PTR)ext_header.nt.OptionalHeader.ImageBase +
323 ext_header.nt.OptionalHeader.SizeOfImage);
324 return ret;
325 case IMAGE_NT_OPTIONAL_HDR64_MAGIC:
326 if (res_start) *res_start = NULL;
327 if (res_end) *res_end = NULL;
328 return ret | BINARY_FLAG_64BIT;
329 }
330 }
331 return BINARY_DOS;
332 }
333
334 if (!memcmp( &ext_header.os2.ne_magic, "NE", 2 ))
335 {
336 /* This is a Windows executable (NE) header. This can
337 * mean either a 16-bit OS/2 or a 16-bit Windows or even a
338 * DOS program (running under a DOS extender). To decide
339 * which, we'll have to read the NE header.
340 */
341 if (len >= sizeof(ext_header.os2))
342 {
343 DWORD flags = (ext_header.os2.ne_flags & NE_FFLAGS_LIBMODULE) ? BINARY_FLAG_DLL : 0;
344 switch ( ext_header.os2.ne_exetyp )
345 {
346 case 1: return flags | BINARY_OS216; /* OS/2 */
347 case 2: return flags | BINARY_WIN16; /* Windows */
348 case 3: return flags | BINARY_DOS; /* European MS-DOS 4.x */
349 case 4: return flags | BINARY_WIN16; /* Windows 386; FIXME: is this 32bit??? */
350 case 5: return flags | BINARY_DOS; /* BOSS, Borland Operating System Services */
351 /* other types, e.g. 0 is: "unknown" */
352 default: return flags | MODULE_Decide_OS2_OldWin(hfile, &header.mz, &ext_header.os2);
353 }
354 }
355 /* Couldn't read header, so abort. */
356 return BINARY_DOS;
357 }
358
359 /* Unknown extended header, but this file is nonetheless DOS-executable. */
360 return BINARY_DOS;
361 }
362
363 return BINARY_UNKNOWN;
364 }
365
366 /***********************************************************************
367 * GetBinaryTypeW [KERNEL32.@]
368 *
369 * Determine whether a file is executable, and if so, what kind.
370 *
371 * PARAMS
372 * lpApplicationName [I] Path of the file to check
373 * lpBinaryType [O] Destination for the binary type
374 *
375 * RETURNS
376 * TRUE, if the file is an executable, in which case lpBinaryType is set.
377 * FALSE, if the file is not an executable or if the function fails.
378 *
379 * NOTES
380 * The type of executable is a property that determines which subsystem an
381 * executable file runs under. lpBinaryType can be set to one of the following
382 * values:
383 * SCS_32BIT_BINARY: A Win32 based application
384 * SCS_DOS_BINARY: An MS-Dos based application
385 * SCS_WOW_BINARY: A Win16 based application
386 * SCS_PIF_BINARY: A PIF file that executes an MS-Dos based app
387 * SCS_POSIX_BINARY: A POSIX based application ( Not implemented )
388 * SCS_OS216_BINARY: A 16bit OS/2 based application
389 *
390 * To find the binary type, this function reads in the files header information.
391 * If extended header information is not present it will assume that the file
392 * is a DOS executable. If extended header information is present it will
393 * determine if the file is a 16 or 32 bit Windows executable by checking the
394 * flags in the header.
395 *
396 * ".com" and ".pif" files are only recognized by their file name extension,
397 * as per native Windows.
398 */
399 BOOL WINAPI GetBinaryTypeW( LPCWSTR lpApplicationName, LPDWORD lpBinaryType )
400 {
401 BOOL ret = FALSE;
402 HANDLE hfile;
403 DWORD binary_type;
404
405 TRACE("%s\n", debugstr_w(lpApplicationName) );
406
407 /* Sanity check.
408 */
409 if ( lpApplicationName == NULL || lpBinaryType == NULL )
410 return FALSE;
411
412 /* Open the file indicated by lpApplicationName for reading.
413 */
414 hfile = CreateFileW( lpApplicationName, GENERIC_READ, FILE_SHARE_READ,
415 NULL, OPEN_EXISTING, 0, 0 );
416 if ( hfile == INVALID_HANDLE_VALUE )
417 return FALSE;
418
419 /* Check binary type
420 */
421 binary_type = MODULE_GetBinaryType( hfile, NULL, NULL );
422 switch (binary_type & BINARY_TYPE_MASK)
423 {
424 case BINARY_UNKNOWN:
425 {
426 static const WCHAR comW[] = { '.','C','O','M',0 };
427 static const WCHAR pifW[] = { '.','P','I','F',0 };
428 const WCHAR *ptr;
429
430 /* try to determine from file name */
431 ptr = strrchrW( lpApplicationName, '.' );
432 if (!ptr) break;
433 if (!strcmpiW( ptr, comW ))
434 {
435 *lpBinaryType = SCS_DOS_BINARY;
436 ret = TRUE;
437 }
438 else if (!strcmpiW( ptr, pifW ))
439 {
440 *lpBinaryType = SCS_PIF_BINARY;
441 ret = TRUE;
442 }
443 break;
444 }
445 case BINARY_PE:
446 *lpBinaryType = SCS_32BIT_BINARY;
447 ret = TRUE;
448 break;
449 case BINARY_WIN16:
450 *lpBinaryType = SCS_WOW_BINARY;
451 ret = TRUE;
452 break;
453 case BINARY_OS216:
454 *lpBinaryType = SCS_OS216_BINARY;
455 ret = TRUE;
456 break;
457 case BINARY_DOS:
458 *lpBinaryType = SCS_DOS_BINARY;
459 ret = TRUE;
460 break;
461 case BINARY_UNIX_EXE:
462 case BINARY_UNIX_LIB:
463 ret = FALSE;
464 break;
465 }
466
467 CloseHandle( hfile );
468 return ret;
469 }
470
471 /***********************************************************************
472 * GetBinaryTypeA [KERNEL32.@]
473 * GetBinaryType [KERNEL32.@]
474 *
475 * See GetBinaryTypeW.
476 */
477 BOOL WINAPI GetBinaryTypeA( LPCSTR lpApplicationName, LPDWORD lpBinaryType )
478 {
479 ANSI_STRING app_nameA;
480 NTSTATUS status;
481
482 TRACE("%s\n", debugstr_a(lpApplicationName));
483
484 /* Sanity check.
485 */
486 if ( lpApplicationName == NULL || lpBinaryType == NULL )
487 return FALSE;
488
489 RtlInitAnsiString(&app_nameA, lpApplicationName);
490 status = RtlAnsiStringToUnicodeString(&NtCurrentTeb()->StaticUnicodeString,
491 &app_nameA, FALSE);
492 if (!status)
493 return GetBinaryTypeW(NtCurrentTeb()->StaticUnicodeString.Buffer, lpBinaryType);
494
495 SetLastError(RtlNtStatusToDosError(status));
496 return FALSE;
497 }
498
499 /***********************************************************************
500 * GetModuleHandleExA (KERNEL32.@)
501 */
502 BOOL WINAPI GetModuleHandleExA( DWORD flags, LPCSTR name, HMODULE *module )
503 {
504 WCHAR *nameW;
505
506 if (!name || (flags & GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS))
507 return GetModuleHandleExW( flags, (LPCWSTR)name, module );
508
509 if (!(nameW = FILE_name_AtoW( name, FALSE ))) return FALSE;
510 return GetModuleHandleExW( flags, nameW, module );
511 }
512
513 /***********************************************************************
514 * GetModuleHandleExW (KERNEL32.@)
515 */
516 BOOL WINAPI GetModuleHandleExW( DWORD flags, LPCWSTR name, HMODULE *module )
517 {
518 NTSTATUS status = STATUS_SUCCESS;
519 HMODULE ret;
520 ULONG magic;
521
522 /* if we are messing with the refcount, grab the loader lock */
523 if ((flags & GET_MODULE_HANDLE_EX_FLAG_PIN) ||
524 !(flags & GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT))
525 LdrLockLoaderLock( 0, NULL, &magic );
526
527 if (!name)
528 {
529 ret = NtCurrentTeb()->Peb->ImageBaseAddress;
530 }
531 else if (flags & GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS)
532 {
533 void *dummy;
534 if (!(ret = RtlPcToFileHeader( (void *)name, &dummy ))) status = STATUS_DLL_NOT_FOUND;
535 }
536 else
537 {
538 UNICODE_STRING wstr;
539 RtlInitUnicodeString( &wstr, name );
540 status = LdrGetDllHandle( NULL, 0, &wstr, &ret );
541 }
542
543 if (status == STATUS_SUCCESS)
544 {
545 if (flags & GET_MODULE_HANDLE_EX_FLAG_PIN)
546 FIXME( "should pin refcount for %p\n", ret );
547 else if (!(flags & GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT))
548 LdrAddRefDll( 0, ret );
549 }
550 else SetLastError( RtlNtStatusToDosError( status ) );
551
552 if ((flags & GET_MODULE_HANDLE_EX_FLAG_PIN) ||
553 !(flags & GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT))
554 LdrUnlockLoaderLock( 0, magic );
555
556 if (module) *module = ret;
557 return (status == STATUS_SUCCESS);
558 }
559
560 /***********************************************************************
561 * GetModuleHandleA (KERNEL32.@)
562 *
563 * Get the handle of a dll loaded into the process address space.
564 *
565 * PARAMS
566 * module [I] Name of the dll
567 *
568 * RETURNS
569 * Success: A handle to the loaded dll.
570 * Failure: A NULL handle. Use GetLastError() to determine the cause.
571 */
572 HMODULE WINAPI GetModuleHandleA(LPCSTR module)
573 {
574 HMODULE ret;
575
576 if (!GetModuleHandleExA( GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT, module, &ret )) ret = 0;
577 return ret;
578 }
579
580 /***********************************************************************
581 * GetModuleHandleW (KERNEL32.@)
582 *
583 * Unicode version of GetModuleHandleA.
584 */
585 HMODULE WINAPI GetModuleHandleW(LPCWSTR module)
586 {
587 HMODULE ret;
588
589 if (!GetModuleHandleExW( GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT, module, &ret )) ret = 0;
590 return ret;
591 }
592
593
594 /***********************************************************************
595 * GetModuleFileNameA (KERNEL32.@)
596 *
597 * Get the file name of a loaded module from its handle.
598 *
599 * RETURNS
600 * Success: The length of the file name, excluding the terminating NUL.
601 * Failure: 0. Use GetLastError() to determine the cause.
602 *
603 * NOTES
604 * This function always returns the long path of hModule (as opposed to
605 * GetModuleFileName16() which returns short paths when the modules version
606 * field is < 4.0).
607 * The function doesn't write a terminating '\0' if the buffer is too
608 * small.
609 */
610 DWORD WINAPI GetModuleFileNameA(
611 HMODULE hModule, /* [in] Module handle (32 bit) */
612 LPSTR lpFileName, /* [out] Destination for file name */
613 DWORD size ) /* [in] Size of lpFileName in characters */
614 {
615 LPWSTR filenameW = HeapAlloc( GetProcessHeap(), 0, size * sizeof(WCHAR) );
616 DWORD len;
617
618 if (!filenameW)
619 {
620 SetLastError( ERROR_NOT_ENOUGH_MEMORY );
621 return 0;
622 }
623 if ((len = GetModuleFileNameW( hModule, filenameW, size )))
624 {
625 len = FILE_name_WtoA( filenameW, len, lpFileName, size );
626 if (len < size)
627 lpFileName[len] = '\0';
628 else
629 SetLastError( ERROR_INSUFFICIENT_BUFFER );
630 }
631 HeapFree( GetProcessHeap(), 0, filenameW );
632 return len;
633 }
634
635 /***********************************************************************
636 * GetModuleFileNameW (KERNEL32.@)
637 *
638 * Unicode version of GetModuleFileNameA.
639 */
640 DWORD WINAPI GetModuleFileNameW( HMODULE hModule, LPWSTR lpFileName, DWORD size )
641 {
642 ULONG magic, len = 0;
643 LDR_MODULE *pldr;
644 NTSTATUS nts;
645 WIN16_SUBSYSTEM_TIB *win16_tib;
646
647 if (!hModule && ((win16_tib = NtCurrentTeb()->Tib.SubSystemTib)) && win16_tib->exe_name)
648 {
649 len = min(size, win16_tib->exe_name->Length / sizeof(WCHAR));
650 memcpy( lpFileName, win16_tib->exe_name->Buffer, len * sizeof(WCHAR) );
651 if (len < size) lpFileName[len] = '\0';
652 goto done;
653 }
654
655 LdrLockLoaderLock( 0, NULL, &magic );
656
657 if (!hModule) hModule = NtCurrentTeb()->Peb->ImageBaseAddress;
658 nts = LdrFindEntryForAddress( hModule, &pldr );
659 if (nts == STATUS_SUCCESS)
660 {
661 len = min(size, pldr->FullDllName.Length / sizeof(WCHAR));
662 memcpy(lpFileName, pldr->FullDllName.Buffer, len * sizeof(WCHAR));
663 if (len < size)
664 lpFileName[len] = '\0';
665 else
666 SetLastError( ERROR_INSUFFICIENT_BUFFER );
667 }
668 else SetLastError( RtlNtStatusToDosError( nts ) );
669
670 LdrUnlockLoaderLock( 0, magic );
671 done:
672 TRACE( "%s\n", debugstr_wn(lpFileName, len) );
673 return len;
674 }
675
676
677 /***********************************************************************
678 * get_dll_system_path
679 */
680 static const WCHAR *get_dll_system_path(void)
681 {
682 static WCHAR *cached_path;
683
684 if (!cached_path)
685 {
686 WCHAR *p, *path;
687 int len = 3;
688
689 len += 2 * GetSystemDirectoryW( NULL, 0 );
690 len += GetWindowsDirectoryW( NULL, 0 );
691 p = path = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) );
692 *p++ = '.';
693 *p++ = ';';
694 GetSystemDirectoryW( p, path + len - p);
695 p += strlenW(p);
696 /* if system directory ends in "32" add 16-bit version too */
697 if (p[-2] == '3' && p[-1] == '2')
698 {
699 *p++ = ';';
700 GetSystemDirectoryW( p, path + len - p);
701 p += strlenW(p) - 2;
702 }
703 *p++ = ';';
704 GetWindowsDirectoryW( p, path + len - p);
705 cached_path = path;
706 }
707 return cached_path;
708 }
709
710 /******************************************************************
711 * get_module_path_end
712 *
713 * Returns the end of the directory component of the module path.
714 */
715 static inline const WCHAR *get_module_path_end(const WCHAR *module)
716 {
717 const WCHAR *p;
718 const WCHAR *mod_end = module;
719 if (!module) return mod_end;
720
721 if ((p = strrchrW( mod_end, '\\' ))) mod_end = p;
722 if ((p = strrchrW( mod_end, '/' ))) mod_end = p;
723 if (mod_end == module + 2 && module[1] == ':') mod_end++;
724 if (mod_end == module && module[0] && module[1] == ':') mod_end += 2;
725
726 return mod_end;
727 }
728
729 /******************************************************************
730 * MODULE_get_dll_load_path
731 *
732 * Compute the load path to use for a given dll.
733 * Returned pointer must be freed by caller.
734 */
735 WCHAR *MODULE_get_dll_load_path( LPCWSTR module )
736 {
737 static const WCHAR pathW[] = {'P','A','T','H',0};
738
739 const WCHAR *system_path = get_dll_system_path();
740 const WCHAR *mod_end = NULL;
741 UNICODE_STRING name, value;
742 WCHAR *p, *ret;
743 int len = 0, path_len = 0;
744
745 /* adjust length for module name */
746
747 if (module)
748 mod_end = get_module_path_end( module );
749 /* if module is NULL or doesn't contain a path, fall back to directory
750 * process was loaded from */
751 if (module == mod_end)
752 {
753 module = NtCurrentTeb()->Peb->ProcessParameters->ImagePathName.Buffer;
754 mod_end = get_module_path_end( module );
755 }
756 len += (mod_end - module) + 1;
757
758 len += strlenW( system_path ) + 2;
759
760 /* get the PATH variable */
761
762 RtlInitUnicodeString( &name, pathW );
763 value.Length = 0;
764 value.MaximumLength = 0;
765 value.Buffer = NULL;
766 if (RtlQueryEnvironmentVariable_U( NULL, &name, &value ) == STATUS_BUFFER_TOO_SMALL)
767 path_len = value.Length;
768
769 RtlEnterCriticalSection( &dlldir_section );
770 if (dll_directory) len += strlenW(dll_directory) + 1;
771 if ((p = ret = HeapAlloc( GetProcessHeap(), 0, path_len + len * sizeof(WCHAR) )))
772 {
773 if (module)
774 {
775 memcpy( ret, module, (mod_end - module) * sizeof(WCHAR) );
776 p += (mod_end - module);
777 *p++ = ';';
778 }
779 if (dll_directory)
780 {
781 strcpyW( p, dll_directory );
782 p += strlenW(p);
783 *p++ = ';';
784 }
785 }
786 RtlLeaveCriticalSection( &dlldir_section );
787 if (!ret) return NULL;
788
789 strcpyW( p, system_path );
790 p += strlenW(p);
791 *p++ = ';';
792 value.Buffer = p;
793 value.MaximumLength = path_len;
794
795 while (RtlQueryEnvironmentVariable_U( NULL, &name, &value ) == STATUS_BUFFER_TOO_SMALL)
796 {
797 WCHAR *new_ptr;
798
799 /* grow the buffer and retry */
800 path_len = value.Length;
801 if (!(new_ptr = HeapReAlloc( GetProcessHeap(), 0, ret, path_len + len * sizeof(WCHAR) )))
802 {
803 HeapFree( GetProcessHeap(), 0, ret );
804 return NULL;
805 }
806 value.Buffer = new_ptr + (value.Buffer - ret);
807 value.MaximumLength = path_len;
808 ret = new_ptr;
809 }
810 value.Buffer[value.Length / sizeof(WCHAR)] = 0;
811 return ret;
812 }
813
814
815 /******************************************************************
816 * load_library_as_datafile
817 */
818 static BOOL load_library_as_datafile( LPCWSTR name, HMODULE* hmod)
819 {
820 static const WCHAR dotDLL[] = {'.','d','l','l',0};
821
822 WCHAR filenameW[MAX_PATH];
823 HANDLE hFile = INVALID_HANDLE_VALUE;
824 HANDLE mapping;
825 HMODULE module;
826
827 *hmod = 0;
828
829 if (SearchPathW( NULL, name, dotDLL, sizeof(filenameW) / sizeof(filenameW[0]),
830 filenameW, NULL ))
831 {
832 hFile = CreateFileW( filenameW, GENERIC_READ, FILE_SHARE_READ,
833 NULL, OPEN_EXISTING, 0, 0 );
834 }
835 if (hFile == INVALID_HANDLE_VALUE) return FALSE;
836
837 mapping = CreateFileMappingW( hFile, NULL, PAGE_READONLY, 0, 0, NULL );
838 CloseHandle( hFile );
839 if (!mapping) return FALSE;
840
841 module = MapViewOfFile( mapping, FILE_MAP_READ, 0, 0, 0 );
842 CloseHandle( mapping );
843 if (!module) return FALSE;
844
845 /* make sure it's a valid PE file */
846 if (!RtlImageNtHeader(module))
847 {
848 UnmapViewOfFile( module );
849 return FALSE;
850 }
851 *hmod = (HMODULE)((char *)module + 1); /* set low bit of handle to indicate datafile module */
852 return TRUE;
853 }
854
855
856 /******************************************************************
857 * load_library
858 *
859 * Helper for LoadLibraryExA/W.
860 */
861 static HMODULE load_library( const UNICODE_STRING *libname, DWORD flags )
862 {
863 NTSTATUS nts;
864 HMODULE hModule;
865 WCHAR *load_path;
866
867 load_path = MODULE_get_dll_load_path( flags & LOAD_WITH_ALTERED_SEARCH_PATH ? libname->Buffer : NULL );
868
869 if (flags & LOAD_LIBRARY_AS_DATAFILE)
870 {
871 ULONG magic;
872
873 LdrLockLoaderLock( 0, NULL, &magic );
874 if (!(nts = LdrGetDllHandle( load_path, flags, libname, &hModule )))
875 {
876 LdrAddRefDll( 0, hModule );
877 LdrUnlockLoaderLock( 0, magic );
878 goto done;
879 }
880 LdrUnlockLoaderLock( 0, magic );
881
882 /* The method in load_library_as_datafile allows searching for the
883 * 'native' libraries only
884 */
885 if (load_library_as_datafile( libname->Buffer, &hModule )) goto done;
886 flags |= DONT_RESOLVE_DLL_REFERENCES; /* Just in case */
887 /* Fallback to normal behaviour */
888 }
889
890 nts = LdrLoadDll( load_path, flags, libname, &hModule );
891 if (nts != STATUS_SUCCESS)
892 {
893 hModule = 0;
894 SetLastError( RtlNtStatusToDosError( nts ) );
895 }
896 done:
897 HeapFree( GetProcessHeap(), 0, load_path );
898 return hModule;
899 }
900
901
902 /******************************************************************
903 * LoadLibraryExA (KERNEL32.@)
904 *
905 * Load a dll file into the process address space.
906 *
907 * PARAMS
908 * libname [I] Name of the file to load
909 * hfile [I] Reserved, must be 0.
910 * flags [I] Flags for loading the dll
911 *
912 * RETURNS
913 * Success: A handle to the loaded dll.
914 * Failure: A NULL handle. Use GetLastError() to determine the cause.
915 *
916 * NOTES
917 * The HFILE parameter is not used and marked reserved in the SDK. I can
918 * only guess that it should force a file to be mapped, but I rather
919 * ignore the parameter because it would be extremely difficult to
920 * integrate this with different types of module representations.
921 */
922 HMODULE WINAPI LoadLibraryExA(LPCSTR libname, HANDLE hfile, DWORD flags)
923 {
924 WCHAR *libnameW;
925
926 if (!(libnameW = FILE_name_AtoW( libname, FALSE ))) return 0;
927 return LoadLibraryExW( libnameW, hfile, flags );
928 }
929
930 /***********************************************************************
931 * LoadLibraryExW (KERNEL32.@)
932 *
933 * Unicode version of LoadLibraryExA.
934 */
935 HMODULE WINAPI LoadLibraryExW(LPCWSTR libnameW, HANDLE hfile, DWORD flags)
936 {
937 UNICODE_STRING wstr;
938 HMODULE res;
939
940 if (!libnameW)
941 {
942 SetLastError(ERROR_INVALID_PARAMETER);
943 return 0;
944 }
945 RtlInitUnicodeString( &wstr, libnameW );
946 if (wstr.Buffer[wstr.Length/sizeof(WCHAR) - 1] != ' ')
947 return load_library( &wstr, flags );
948
949 /* Library name has trailing spaces */
950 RtlCreateUnicodeString( &wstr, libnameW );
951 while (wstr.Length > sizeof(WCHAR) &&
952 wstr.Buffer[wstr.Length/sizeof(WCHAR) - 1] == ' ')
953 {
954 wstr.Length -= sizeof(WCHAR);
955 }
956 wstr.Buffer[wstr.Length/sizeof(WCHAR)] = '\0';
957 res = load_library( &wstr, flags );
958 RtlFreeUnicodeString( &wstr );
959 return res;
960 }
961
962 /***********************************************************************
963 * LoadLibraryA (KERNEL32.@)
964 *
965 * Load a dll file into the process address space.
966 *
967 * PARAMS
968 * libname [I] Name of the file to load
969 *
970 * RETURNS
971 * Success: A handle to the loaded dll.
972 * Failure: A NULL handle. Use GetLastError() to determine the cause.
973 *
974 * NOTES
975 * See LoadLibraryExA().
976 */
977 HMODULE WINAPI LoadLibraryA(LPCSTR libname)
978 {
979 return LoadLibraryExA(libname, 0, 0);
980 }
981
982 /***********************************************************************
983 * LoadLibraryW (KERNEL32.@)
984 *
985 * Unicode version of LoadLibraryA.
986 */
987 HMODULE WINAPI LoadLibraryW(LPCWSTR libnameW)
988 {
989 return LoadLibraryExW(libnameW, 0, 0);
990 }
991
992 /***********************************************************************
993 * FreeLibrary (KERNEL32.@)
994 *
995 * Free a dll loaded into the process address space.
996 *
997 * PARAMS
998 * hLibModule [I] Handle to the dll returned by LoadLibraryA().
999 *
1000 * RETURNS
1001 * Success: TRUE. The dll is removed if it is not still in use.
1002 * Failure: FALSE. Use GetLastError() to determine the cause.
1003 */
1004 BOOL WINAPI FreeLibrary(HINSTANCE hLibModule)
1005 {
1006 BOOL retv = FALSE;
1007 NTSTATUS nts;
1008
1009 if (!hLibModule)
1010 {
1011 SetLastError( ERROR_INVALID_HANDLE );
1012 return FALSE;
1013 }
1014
1015 if ((ULONG_PTR)hLibModule & 1)
1016 {
1017 /* this is a LOAD_LIBRARY_AS_DATAFILE module */
1018 char *ptr = (char *)hLibModule - 1;
1019 UnmapViewOfFile( ptr );
1020 return TRUE;
1021 }
1022
1023 if ((nts = LdrUnloadDll( hLibModule )) == STATUS_SUCCESS) retv = TRUE;
1024 else SetLastError( RtlNtStatusToDosError( nts ) );
1025
1026 return retv;
1027 }
1028
1029 /***********************************************************************
1030 * GetProcAddress (KERNEL32.@)
1031 *
1032 * Find the address of an exported symbol in a loaded dll.
1033 *
1034 * PARAMS
1035 * hModule [I] Handle to the dll returned by LoadLibraryA().
1036 * function [I] Name of the symbol, or an integer ordinal number < 16384
1037 *
1038 * RETURNS
1039 * Success: A pointer to the symbol in the process address space.
1040 * Failure: NULL. Use GetLastError() to determine the cause.
1041 */
1042 FARPROC WINAPI GetProcAddress( HMODULE hModule, LPCSTR function )
1043 {
1044 NTSTATUS nts;
1045 FARPROC fp;
1046
1047 if (!hModule) hModule = NtCurrentTeb()->Peb->ImageBaseAddress;
1048
1049 if (HIWORD(function))
1050 {
1051 ANSI_STRING str;
1052
1053 RtlInitAnsiString( &str, function );
1054 nts = LdrGetProcedureAddress( hModule, &str, 0, (void**)&fp );
1055 }
1056 else
1057 nts = LdrGetProcedureAddress( hModule, NULL, LOWORD(function), (void**)&fp );
1058 if (nts != STATUS_SUCCESS)
1059 {
1060 SetLastError( RtlNtStatusToDosError( nts ) );
1061 fp = NULL;
1062 }
1063 return fp;
1064 }
1065
1066 /***********************************************************************
1067 * DelayLoadFailureHook (KERNEL32.@)
1068 */
1069 FARPROC WINAPI DelayLoadFailureHook( LPCSTR name, LPCSTR function )
1070 {
1071 ULONG_PTR args[2];
1072
1073 if ((ULONG_PTR)function >> 16)
1074 ERR( "failed to delay load %s.%s\n", name, function );
1075 else
1076 ERR( "failed to delay load %s.%u\n", name, LOWORD(function) );
1077 args[0] = (ULONG_PTR)name;
1078 args[1] = (ULONG_PTR)function;
1079 RaiseException( EXCEPTION_WINE_STUB, EH_NONCONTINUABLE, 2, args );
1080 return NULL;
1081 }
1082
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