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 void MODULE_get_binary_info( HANDLE hfile, struct binary_info *info )
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 memset( info, 0, sizeof(*info) );
256
257 /* Seek to the start of the file and read the header information. */
258 if (SetFilePointer( hfile, 0, NULL, SEEK_SET ) == -1) return;
259 if (!ReadFile( hfile, &header, sizeof(header), &len, NULL ) || len != sizeof(header)) return;
260
261 if (!memcmp( header.elf.magic, "\177ELF", 4 ))
262 {
263 if (header.elf.class == 2) info->flags |= BINARY_FLAG_64BIT;
264 /* FIXME: we don't bother to check byte order, architecture, etc. */
265 switch(header.elf.type)
266 {
267 case 2: info->type = BINARY_UNIX_EXE; break;
268 case 3: info->type = BINARY_UNIX_LIB; break;
269 }
270 }
271 /* Mach-o File with Endian set to Big Endian or Little Endian */
272 else if (header.macho.magic == 0xfeedface || header.macho.magic == 0xcefaedfe)
273 {
274 if ((header.macho.cputype >> 24) == 1) info->flags |= BINARY_FLAG_64BIT;
275 switch(header.macho.filetype)
276 {
277 case 2: info->type = BINARY_UNIX_EXE; break;
278 case 8: info->type = BINARY_UNIX_LIB; break;
279 }
280 }
281 /* Not ELF, try DOS */
282 else if (header.mz.e_magic == IMAGE_DOS_SIGNATURE)
283 {
284 union
285 {
286 IMAGE_OS2_HEADER os2;
287 IMAGE_NT_HEADERS32 nt;
288 } ext_header;
289
290 /* We do have a DOS image so we will now try to seek into
291 * the file by the amount indicated by the field
292 * "Offset to extended header" and read in the
293 * "magic" field information at that location.
294 * This will tell us if there is more header information
295 * to read or not.
296 */
297 info->type = BINARY_DOS;
298 if (SetFilePointer( hfile, header.mz.e_lfanew, NULL, SEEK_SET ) == -1) return;
299 if (!ReadFile( hfile, &ext_header, sizeof(ext_header), &len, NULL ) || len < 4) return;
300
301 /* Reading the magic field succeeded so
302 * we will try to determine what type it is.
303 */
304 if (!memcmp( &ext_header.nt.Signature, "PE\0\0", 4 ))
305 {
306 if (len >= sizeof(ext_header.nt.FileHeader))
307 {
308 info->type = BINARY_PE;
309 if (ext_header.nt.FileHeader.Characteristics & IMAGE_FILE_DLL)
310 info->flags |= BINARY_FLAG_DLL;
311 if (len < sizeof(ext_header.nt)) /* clear remaining part of header if missing */
312 memset( (char *)&ext_header.nt + len, 0, sizeof(ext_header.nt) - len );
313 switch (ext_header.nt.OptionalHeader.Magic)
314 {
315 case IMAGE_NT_OPTIONAL_HDR32_MAGIC:
316 info->res_start = (void *)(ULONG_PTR)ext_header.nt.OptionalHeader.ImageBase;
317 info->res_end = (void *)((ULONG_PTR)ext_header.nt.OptionalHeader.ImageBase +
318 ext_header.nt.OptionalHeader.SizeOfImage);
319 break;
320 case IMAGE_NT_OPTIONAL_HDR64_MAGIC:
321 info->flags |= BINARY_FLAG_64BIT;
322 break;
323 }
324 }
325 }
326 else if (!memcmp( &ext_header.os2.ne_magic, "NE", 2 ))
327 {
328 /* This is a Windows executable (NE) header. This can
329 * mean either a 16-bit OS/2 or a 16-bit Windows or even a
330 * DOS program (running under a DOS extender). To decide
331 * which, we'll have to read the NE header.
332 */
333 if (len >= sizeof(ext_header.os2))
334 {
335 if (ext_header.os2.ne_flags & NE_FFLAGS_LIBMODULE) info->flags |= BINARY_FLAG_DLL;
336 switch ( ext_header.os2.ne_exetyp )
337 {
338 case 1: info->type = BINARY_OS216; break; /* OS/2 */
339 case 2: info->type = BINARY_WIN16; break; /* Windows */
340 case 3: info->type = BINARY_DOS; break; /* European MS-DOS 4.x */
341 case 4: info->type = BINARY_WIN16; break; /* Windows 386; FIXME: is this 32bit??? */
342 case 5: info->type = BINARY_DOS; break; /* BOSS, Borland Operating System Services */
343 /* other types, e.g. 0 is: "unknown" */
344 default: info->type = MODULE_Decide_OS2_OldWin(hfile, &header.mz, &ext_header.os2); break;
345 }
346 }
347 }
348 }
349 }
350
351 /***********************************************************************
352 * GetBinaryTypeW [KERNEL32.@]
353 *
354 * Determine whether a file is executable, and if so, what kind.
355 *
356 * PARAMS
357 * lpApplicationName [I] Path of the file to check
358 * lpBinaryType [O] Destination for the binary type
359 *
360 * RETURNS
361 * TRUE, if the file is an executable, in which case lpBinaryType is set.
362 * FALSE, if the file is not an executable or if the function fails.
363 *
364 * NOTES
365 * The type of executable is a property that determines which subsystem an
366 * executable file runs under. lpBinaryType can be set to one of the following
367 * values:
368 * SCS_32BIT_BINARY: A Win32 based application
369 * SCS_DOS_BINARY: An MS-Dos based application
370 * SCS_WOW_BINARY: A Win16 based application
371 * SCS_PIF_BINARY: A PIF file that executes an MS-Dos based app
372 * SCS_POSIX_BINARY: A POSIX based application ( Not implemented )
373 * SCS_OS216_BINARY: A 16bit OS/2 based application
374 *
375 * To find the binary type, this function reads in the files header information.
376 * If extended header information is not present it will assume that the file
377 * is a DOS executable. If extended header information is present it will
378 * determine if the file is a 16 or 32 bit Windows executable by checking the
379 * flags in the header.
380 *
381 * ".com" and ".pif" files are only recognized by their file name extension,
382 * as per native Windows.
383 */
384 BOOL WINAPI GetBinaryTypeW( LPCWSTR lpApplicationName, LPDWORD lpBinaryType )
385 {
386 BOOL ret = FALSE;
387 HANDLE hfile;
388 struct binary_info binary_info;
389
390 TRACE("%s\n", debugstr_w(lpApplicationName) );
391
392 /* Sanity check.
393 */
394 if ( lpApplicationName == NULL || lpBinaryType == NULL )
395 return FALSE;
396
397 /* Open the file indicated by lpApplicationName for reading.
398 */
399 hfile = CreateFileW( lpApplicationName, GENERIC_READ, FILE_SHARE_READ,
400 NULL, OPEN_EXISTING, 0, 0 );
401 if ( hfile == INVALID_HANDLE_VALUE )
402 return FALSE;
403
404 /* Check binary type
405 */
406 MODULE_get_binary_info( hfile, &binary_info );
407 switch (binary_info.type)
408 {
409 case BINARY_UNKNOWN:
410 {
411 static const WCHAR comW[] = { '.','C','O','M',0 };
412 static const WCHAR pifW[] = { '.','P','I','F',0 };
413 const WCHAR *ptr;
414
415 /* try to determine from file name */
416 ptr = strrchrW( lpApplicationName, '.' );
417 if (!ptr) break;
418 if (!strcmpiW( ptr, comW ))
419 {
420 *lpBinaryType = SCS_DOS_BINARY;
421 ret = TRUE;
422 }
423 else if (!strcmpiW( ptr, pifW ))
424 {
425 *lpBinaryType = SCS_PIF_BINARY;
426 ret = TRUE;
427 }
428 break;
429 }
430 case BINARY_PE:
431 *lpBinaryType = (binary_info.flags & BINARY_FLAG_64BIT) ? SCS_64BIT_BINARY : SCS_32BIT_BINARY;
432 ret = TRUE;
433 break;
434 case BINARY_WIN16:
435 *lpBinaryType = SCS_WOW_BINARY;
436 ret = TRUE;
437 break;
438 case BINARY_OS216:
439 *lpBinaryType = SCS_OS216_BINARY;
440 ret = TRUE;
441 break;
442 case BINARY_DOS:
443 *lpBinaryType = SCS_DOS_BINARY;
444 ret = TRUE;
445 break;
446 case BINARY_UNIX_EXE:
447 case BINARY_UNIX_LIB:
448 ret = FALSE;
449 break;
450 }
451
452 CloseHandle( hfile );
453 return ret;
454 }
455
456 /***********************************************************************
457 * GetBinaryTypeA [KERNEL32.@]
458 * GetBinaryType [KERNEL32.@]
459 *
460 * See GetBinaryTypeW.
461 */
462 BOOL WINAPI GetBinaryTypeA( LPCSTR lpApplicationName, LPDWORD lpBinaryType )
463 {
464 ANSI_STRING app_nameA;
465 NTSTATUS status;
466
467 TRACE("%s\n", debugstr_a(lpApplicationName));
468
469 /* Sanity check.
470 */
471 if ( lpApplicationName == NULL || lpBinaryType == NULL )
472 return FALSE;
473
474 RtlInitAnsiString(&app_nameA, lpApplicationName);
475 status = RtlAnsiStringToUnicodeString(&NtCurrentTeb()->StaticUnicodeString,
476 &app_nameA, FALSE);
477 if (!status)
478 return GetBinaryTypeW(NtCurrentTeb()->StaticUnicodeString.Buffer, lpBinaryType);
479
480 SetLastError(RtlNtStatusToDosError(status));
481 return FALSE;
482 }
483
484 /***********************************************************************
485 * GetModuleHandleExA (KERNEL32.@)
486 */
487 BOOL WINAPI GetModuleHandleExA( DWORD flags, LPCSTR name, HMODULE *module )
488 {
489 WCHAR *nameW;
490
491 if (!name || (flags & GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS))
492 return GetModuleHandleExW( flags, (LPCWSTR)name, module );
493
494 if (!(nameW = FILE_name_AtoW( name, FALSE ))) return FALSE;
495 return GetModuleHandleExW( flags, nameW, module );
496 }
497
498 /***********************************************************************
499 * GetModuleHandleExW (KERNEL32.@)
500 */
501 BOOL WINAPI GetModuleHandleExW( DWORD flags, LPCWSTR name, HMODULE *module )
502 {
503 NTSTATUS status = STATUS_SUCCESS;
504 HMODULE ret;
505 ULONG magic;
506
507 /* if we are messing with the refcount, grab the loader lock */
508 if ((flags & GET_MODULE_HANDLE_EX_FLAG_PIN) ||
509 !(flags & GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT))
510 LdrLockLoaderLock( 0, NULL, &magic );
511
512 if (!name)
513 {
514 ret = NtCurrentTeb()->Peb->ImageBaseAddress;
515 }
516 else if (flags & GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS)
517 {
518 void *dummy;
519 if (!(ret = RtlPcToFileHeader( (void *)name, &dummy ))) status = STATUS_DLL_NOT_FOUND;
520 }
521 else
522 {
523 UNICODE_STRING wstr;
524 RtlInitUnicodeString( &wstr, name );
525 status = LdrGetDllHandle( NULL, 0, &wstr, &ret );
526 }
527
528 if (status == STATUS_SUCCESS)
529 {
530 if (flags & GET_MODULE_HANDLE_EX_FLAG_PIN)
531 FIXME( "should pin refcount for %p\n", ret );
532 else if (!(flags & GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT))
533 LdrAddRefDll( 0, ret );
534 }
535 else SetLastError( RtlNtStatusToDosError( status ) );
536
537 if ((flags & GET_MODULE_HANDLE_EX_FLAG_PIN) ||
538 !(flags & GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT))
539 LdrUnlockLoaderLock( 0, magic );
540
541 if (module) *module = ret;
542 return (status == STATUS_SUCCESS);
543 }
544
545 /***********************************************************************
546 * GetModuleHandleA (KERNEL32.@)
547 *
548 * Get the handle of a dll loaded into the process address space.
549 *
550 * PARAMS
551 * module [I] Name of the dll
552 *
553 * RETURNS
554 * Success: A handle to the loaded dll.
555 * Failure: A NULL handle. Use GetLastError() to determine the cause.
556 */
557 HMODULE WINAPI GetModuleHandleA(LPCSTR module)
558 {
559 HMODULE ret;
560
561 if (!GetModuleHandleExA( GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT, module, &ret )) ret = 0;
562 return ret;
563 }
564
565 /***********************************************************************
566 * GetModuleHandleW (KERNEL32.@)
567 *
568 * Unicode version of GetModuleHandleA.
569 */
570 HMODULE WINAPI GetModuleHandleW(LPCWSTR module)
571 {
572 HMODULE ret;
573
574 if (!GetModuleHandleExW( GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT, module, &ret )) ret = 0;
575 return ret;
576 }
577
578
579 /***********************************************************************
580 * GetModuleFileNameA (KERNEL32.@)
581 *
582 * Get the file name of a loaded module from its handle.
583 *
584 * RETURNS
585 * Success: The length of the file name, excluding the terminating NUL.
586 * Failure: 0. Use GetLastError() to determine the cause.
587 *
588 * NOTES
589 * This function always returns the long path of hModule (as opposed to
590 * GetModuleFileName16() which returns short paths when the modules version
591 * field is < 4.0).
592 * The function doesn't write a terminating '\0' if the buffer is too
593 * small.
594 */
595 DWORD WINAPI GetModuleFileNameA(
596 HMODULE hModule, /* [in] Module handle (32 bit) */
597 LPSTR lpFileName, /* [out] Destination for file name */
598 DWORD size ) /* [in] Size of lpFileName in characters */
599 {
600 LPWSTR filenameW = HeapAlloc( GetProcessHeap(), 0, size * sizeof(WCHAR) );
601 DWORD len;
602
603 if (!filenameW)
604 {
605 SetLastError( ERROR_NOT_ENOUGH_MEMORY );
606 return 0;
607 }
608 if ((len = GetModuleFileNameW( hModule, filenameW, size )))
609 {
610 len = FILE_name_WtoA( filenameW, len, lpFileName, size );
611 if (len < size)
612 lpFileName[len] = '\0';
613 else
614 SetLastError( ERROR_INSUFFICIENT_BUFFER );
615 }
616 HeapFree( GetProcessHeap(), 0, filenameW );
617 return len;
618 }
619
620 /***********************************************************************
621 * GetModuleFileNameW (KERNEL32.@)
622 *
623 * Unicode version of GetModuleFileNameA.
624 */
625 DWORD WINAPI GetModuleFileNameW( HMODULE hModule, LPWSTR lpFileName, DWORD size )
626 {
627 ULONG magic, len = 0;
628 LDR_MODULE *pldr;
629 NTSTATUS nts;
630 WIN16_SUBSYSTEM_TIB *win16_tib;
631
632 if (!hModule && ((win16_tib = NtCurrentTeb()->Tib.SubSystemTib)) && win16_tib->exe_name)
633 {
634 len = min(size, win16_tib->exe_name->Length / sizeof(WCHAR));
635 memcpy( lpFileName, win16_tib->exe_name->Buffer, len * sizeof(WCHAR) );
636 if (len < size) lpFileName[len] = '\0';
637 goto done;
638 }
639
640 LdrLockLoaderLock( 0, NULL, &magic );
641
642 if (!hModule) hModule = NtCurrentTeb()->Peb->ImageBaseAddress;
643 nts = LdrFindEntryForAddress( hModule, &pldr );
644 if (nts == STATUS_SUCCESS)
645 {
646 len = min(size, pldr->FullDllName.Length / sizeof(WCHAR));
647 memcpy(lpFileName, pldr->FullDllName.Buffer, len * sizeof(WCHAR));
648 if (len < size)
649 lpFileName[len] = '\0';
650 else
651 SetLastError( ERROR_INSUFFICIENT_BUFFER );
652 }
653 else SetLastError( RtlNtStatusToDosError( nts ) );
654
655 LdrUnlockLoaderLock( 0, magic );
656 done:
657 TRACE( "%s\n", debugstr_wn(lpFileName, len) );
658 return len;
659 }
660
661
662 /***********************************************************************
663 * get_dll_system_path
664 */
665 static const WCHAR *get_dll_system_path(void)
666 {
667 static WCHAR *cached_path;
668
669 if (!cached_path)
670 {
671 WCHAR *p, *path;
672 int len = 3;
673
674 len += 2 * GetSystemDirectoryW( NULL, 0 );
675 len += GetWindowsDirectoryW( NULL, 0 );
676 p = path = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) );
677 *p++ = '.';
678 *p++ = ';';
679 GetSystemDirectoryW( p, path + len - p);
680 p += strlenW(p);
681 /* if system directory ends in "32" add 16-bit version too */
682 if (p[-2] == '3' && p[-1] == '2')
683 {
684 *p++ = ';';
685 GetSystemDirectoryW( p, path + len - p);
686 p += strlenW(p) - 2;
687 }
688 *p++ = ';';
689 GetWindowsDirectoryW( p, path + len - p);
690 cached_path = path;
691 }
692 return cached_path;
693 }
694
695 /******************************************************************
696 * get_module_path_end
697 *
698 * Returns the end of the directory component of the module path.
699 */
700 static inline const WCHAR *get_module_path_end(const WCHAR *module)
701 {
702 const WCHAR *p;
703 const WCHAR *mod_end = module;
704 if (!module) return mod_end;
705
706 if ((p = strrchrW( mod_end, '\\' ))) mod_end = p;
707 if ((p = strrchrW( mod_end, '/' ))) mod_end = p;
708 if (mod_end == module + 2 && module[1] == ':') mod_end++;
709 if (mod_end == module && module[0] && module[1] == ':') mod_end += 2;
710
711 return mod_end;
712 }
713
714 /******************************************************************
715 * MODULE_get_dll_load_path
716 *
717 * Compute the load path to use for a given dll.
718 * Returned pointer must be freed by caller.
719 */
720 WCHAR *MODULE_get_dll_load_path( LPCWSTR module )
721 {
722 static const WCHAR pathW[] = {'P','A','T','H',0};
723
724 const WCHAR *system_path = get_dll_system_path();
725 const WCHAR *mod_end = NULL;
726 UNICODE_STRING name, value;
727 WCHAR *p, *ret;
728 int len = 0, path_len = 0;
729
730 /* adjust length for module name */
731
732 if (module)
733 mod_end = get_module_path_end( module );
734 /* if module is NULL or doesn't contain a path, fall back to directory
735 * process was loaded from */
736 if (module == mod_end)
737 {
738 module = NtCurrentTeb()->Peb->ProcessParameters->ImagePathName.Buffer;
739 mod_end = get_module_path_end( module );
740 }
741 len += (mod_end - module) + 1;
742
743 len += strlenW( system_path ) + 2;
744
745 /* get the PATH variable */
746
747 RtlInitUnicodeString( &name, pathW );
748 value.Length = 0;
749 value.MaximumLength = 0;
750 value.Buffer = NULL;
751 if (RtlQueryEnvironmentVariable_U( NULL, &name, &value ) == STATUS_BUFFER_TOO_SMALL)
752 path_len = value.Length;
753
754 RtlEnterCriticalSection( &dlldir_section );
755 if (dll_directory) len += strlenW(dll_directory) + 1;
756 if ((p = ret = HeapAlloc( GetProcessHeap(), 0, path_len + len * sizeof(WCHAR) )))
757 {
758 if (module)
759 {
760 memcpy( ret, module, (mod_end - module) * sizeof(WCHAR) );
761 p += (mod_end - module);
762 *p++ = ';';
763 }
764 if (dll_directory)
765 {
766 strcpyW( p, dll_directory );
767 p += strlenW(p);
768 *p++ = ';';
769 }
770 }
771 RtlLeaveCriticalSection( &dlldir_section );
772 if (!ret) return NULL;
773
774 strcpyW( p, system_path );
775 p += strlenW(p);
776 *p++ = ';';
777 value.Buffer = p;
778 value.MaximumLength = path_len;
779
780 while (RtlQueryEnvironmentVariable_U( NULL, &name, &value ) == STATUS_BUFFER_TOO_SMALL)
781 {
782 WCHAR *new_ptr;
783
784 /* grow the buffer and retry */
785 path_len = value.Length;
786 if (!(new_ptr = HeapReAlloc( GetProcessHeap(), 0, ret, path_len + len * sizeof(WCHAR) )))
787 {
788 HeapFree( GetProcessHeap(), 0, ret );
789 return NULL;
790 }
791 value.Buffer = new_ptr + (value.Buffer - ret);
792 value.MaximumLength = path_len;
793 ret = new_ptr;
794 }
795 value.Buffer[value.Length / sizeof(WCHAR)] = 0;
796 return ret;
797 }
798
799
800 /******************************************************************
801 * load_library_as_datafile
802 */
803 static BOOL load_library_as_datafile( LPCWSTR name, HMODULE* hmod)
804 {
805 static const WCHAR dotDLL[] = {'.','d','l','l',0};
806
807 WCHAR filenameW[MAX_PATH];
808 HANDLE hFile = INVALID_HANDLE_VALUE;
809 HANDLE mapping;
810 HMODULE module;
811
812 *hmod = 0;
813
814 if (SearchPathW( NULL, name, dotDLL, sizeof(filenameW) / sizeof(filenameW[0]),
815 filenameW, NULL ))
816 {
817 hFile = CreateFileW( filenameW, GENERIC_READ, FILE_SHARE_READ,
818 NULL, OPEN_EXISTING, 0, 0 );
819 }
820 if (hFile == INVALID_HANDLE_VALUE) return FALSE;
821
822 mapping = CreateFileMappingW( hFile, NULL, PAGE_READONLY, 0, 0, NULL );
823 CloseHandle( hFile );
824 if (!mapping) return FALSE;
825
826 module = MapViewOfFile( mapping, FILE_MAP_READ, 0, 0, 0 );
827 CloseHandle( mapping );
828 if (!module) return FALSE;
829
830 /* make sure it's a valid PE file */
831 if (!RtlImageNtHeader(module))
832 {
833 UnmapViewOfFile( module );
834 return FALSE;
835 }
836 *hmod = (HMODULE)((char *)module + 1); /* set low bit of handle to indicate datafile module */
837 return TRUE;
838 }
839
840
841 /******************************************************************
842 * load_library
843 *
844 * Helper for LoadLibraryExA/W.
845 */
846 static HMODULE load_library( const UNICODE_STRING *libname, DWORD flags )
847 {
848 NTSTATUS nts;
849 HMODULE hModule;
850 WCHAR *load_path;
851
852 load_path = MODULE_get_dll_load_path( flags & LOAD_WITH_ALTERED_SEARCH_PATH ? libname->Buffer : NULL );
853
854 if (flags & LOAD_LIBRARY_AS_DATAFILE)
855 {
856 ULONG magic;
857
858 LdrLockLoaderLock( 0, NULL, &magic );
859 if (!(nts = LdrGetDllHandle( load_path, flags, libname, &hModule )))
860 {
861 LdrAddRefDll( 0, hModule );
862 LdrUnlockLoaderLock( 0, magic );
863 goto done;
864 }
865 LdrUnlockLoaderLock( 0, magic );
866
867 /* The method in load_library_as_datafile allows searching for the
868 * 'native' libraries only
869 */
870 if (load_library_as_datafile( libname->Buffer, &hModule )) goto done;
871 flags |= DONT_RESOLVE_DLL_REFERENCES; /* Just in case */
872 /* Fallback to normal behaviour */
873 }
874
875 nts = LdrLoadDll( load_path, flags, libname, &hModule );
876 if (nts != STATUS_SUCCESS)
877 {
878 hModule = 0;
879 SetLastError( RtlNtStatusToDosError( nts ) );
880 }
881 done:
882 HeapFree( GetProcessHeap(), 0, load_path );
883 return hModule;
884 }
885
886
887 /******************************************************************
888 * LoadLibraryExA (KERNEL32.@)
889 *
890 * Load a dll file into the process address space.
891 *
892 * PARAMS
893 * libname [I] Name of the file to load
894 * hfile [I] Reserved, must be 0.
895 * flags [I] Flags for loading the dll
896 *
897 * RETURNS
898 * Success: A handle to the loaded dll.
899 * Failure: A NULL handle. Use GetLastError() to determine the cause.
900 *
901 * NOTES
902 * The HFILE parameter is not used and marked reserved in the SDK. I can
903 * only guess that it should force a file to be mapped, but I rather
904 * ignore the parameter because it would be extremely difficult to
905 * integrate this with different types of module representations.
906 */
907 HMODULE WINAPI DECLSPEC_HOTPATCH LoadLibraryExA(LPCSTR libname, HANDLE hfile, DWORD flags)
908 {
909 WCHAR *libnameW;
910
911 if (!(libnameW = FILE_name_AtoW( libname, FALSE ))) return 0;
912 return LoadLibraryExW( libnameW, hfile, flags );
913 }
914
915 /***********************************************************************
916 * LoadLibraryExW (KERNEL32.@)
917 *
918 * Unicode version of LoadLibraryExA.
919 */
920 HMODULE WINAPI DECLSPEC_HOTPATCH LoadLibraryExW(LPCWSTR libnameW, HANDLE hfile, DWORD flags)
921 {
922 UNICODE_STRING wstr;
923 HMODULE res;
924
925 if (!libnameW)
926 {
927 SetLastError(ERROR_INVALID_PARAMETER);
928 return 0;
929 }
930 RtlInitUnicodeString( &wstr, libnameW );
931 if (wstr.Buffer[wstr.Length/sizeof(WCHAR) - 1] != ' ')
932 return load_library( &wstr, flags );
933
934 /* Library name has trailing spaces */
935 RtlCreateUnicodeString( &wstr, libnameW );
936 while (wstr.Length > sizeof(WCHAR) &&
937 wstr.Buffer[wstr.Length/sizeof(WCHAR) - 1] == ' ')
938 {
939 wstr.Length -= sizeof(WCHAR);
940 }
941 wstr.Buffer[wstr.Length/sizeof(WCHAR)] = '\0';
942 res = load_library( &wstr, flags );
943 RtlFreeUnicodeString( &wstr );
944 return res;
945 }
946
947 /***********************************************************************
948 * LoadLibraryA (KERNEL32.@)
949 *
950 * Load a dll file into the process address space.
951 *
952 * PARAMS
953 * libname [I] Name of the file to load
954 *
955 * RETURNS
956 * Success: A handle to the loaded dll.
957 * Failure: A NULL handle. Use GetLastError() to determine the cause.
958 *
959 * NOTES
960 * See LoadLibraryExA().
961 */
962 HMODULE WINAPI DECLSPEC_HOTPATCH LoadLibraryA(LPCSTR libname)
963 {
964 return LoadLibraryExA(libname, 0, 0);
965 }
966
967 /***********************************************************************
968 * LoadLibraryW (KERNEL32.@)
969 *
970 * Unicode version of LoadLibraryA.
971 */
972 HMODULE WINAPI DECLSPEC_HOTPATCH LoadLibraryW(LPCWSTR libnameW)
973 {
974 return LoadLibraryExW(libnameW, 0, 0);
975 }
976
977 /***********************************************************************
978 * FreeLibrary (KERNEL32.@)
979 *
980 * Free a dll loaded into the process address space.
981 *
982 * PARAMS
983 * hLibModule [I] Handle to the dll returned by LoadLibraryA().
984 *
985 * RETURNS
986 * Success: TRUE. The dll is removed if it is not still in use.
987 * Failure: FALSE. Use GetLastError() to determine the cause.
988 */
989 BOOL WINAPI DECLSPEC_HOTPATCH FreeLibrary(HINSTANCE hLibModule)
990 {
991 BOOL retv = FALSE;
992 NTSTATUS nts;
993
994 if (!hLibModule)
995 {
996 SetLastError( ERROR_INVALID_HANDLE );
997 return FALSE;
998 }
999
1000 if ((ULONG_PTR)hLibModule & 1)
1001 {
1002 /* this is a LOAD_LIBRARY_AS_DATAFILE module */
1003 char *ptr = (char *)hLibModule - 1;
1004 UnmapViewOfFile( ptr );
1005 return TRUE;
1006 }
1007
1008 if ((nts = LdrUnloadDll( hLibModule )) == STATUS_SUCCESS) retv = TRUE;
1009 else SetLastError( RtlNtStatusToDosError( nts ) );
1010
1011 return retv;
1012 }
1013
1014 /***********************************************************************
1015 * GetProcAddress (KERNEL32.@)
1016 *
1017 * Find the address of an exported symbol in a loaded dll.
1018 *
1019 * PARAMS
1020 * hModule [I] Handle to the dll returned by LoadLibraryA().
1021 * function [I] Name of the symbol, or an integer ordinal number < 16384
1022 *
1023 * RETURNS
1024 * Success: A pointer to the symbol in the process address space.
1025 * Failure: NULL. Use GetLastError() to determine the cause.
1026 */
1027 FARPROC WINAPI GetProcAddress( HMODULE hModule, LPCSTR function )
1028 {
1029 NTSTATUS nts;
1030 FARPROC fp;
1031
1032 if (!hModule) hModule = NtCurrentTeb()->Peb->ImageBaseAddress;
1033
1034 if (HIWORD(function))
1035 {
1036 ANSI_STRING str;
1037
1038 RtlInitAnsiString( &str, function );
1039 nts = LdrGetProcedureAddress( hModule, &str, 0, (void**)&fp );
1040 }
1041 else
1042 nts = LdrGetProcedureAddress( hModule, NULL, LOWORD(function), (void**)&fp );
1043 if (nts != STATUS_SUCCESS)
1044 {
1045 SetLastError( RtlNtStatusToDosError( nts ) );
1046 fp = NULL;
1047 }
1048 return fp;
1049 }
1050
1051 /***********************************************************************
1052 * DelayLoadFailureHook (KERNEL32.@)
1053 */
1054 FARPROC WINAPI DelayLoadFailureHook( LPCSTR name, LPCSTR function )
1055 {
1056 ULONG_PTR args[2];
1057
1058 if ((ULONG_PTR)function >> 16)
1059 ERR( "failed to delay load %s.%s\n", name, function );
1060 else
1061 ERR( "failed to delay load %s.%u\n", name, LOWORD(function) );
1062 args[0] = (ULONG_PTR)name;
1063 args[1] = (ULONG_PTR)function;
1064 RaiseException( EXCEPTION_WINE_STUB, EH_NONCONTINUABLE, 2, args );
1065 return NULL;
1066 }
1067
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