2 * Win32 builtin dlls support
4 * Copyright 2000 Alexandre Julliard
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.
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.
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
22 #include "wine/port.h"
31 #include <sys/types.h>
32 #ifdef HAVE_SYS_MMAN_H
35 #ifdef HAVE_SYS_RESOURCE_H
36 # include <sys/resource.h>
42 #define NONAMELESSUNION
43 #define NONAMELESSSTRUCT
46 #include "wine/library.h"
49 #include <crt_externs.h>
50 #define environ (*_NSGetEnviron())
52 extern char **environ;
55 /* argc/argv for the Windows application */
56 int __wine_main_argc = 0;
57 char **__wine_main_argv = NULL;
58 WCHAR **__wine_main_wargv = NULL;
59 char **__wine_main_environ = NULL;
61 struct dll_path_context
63 unsigned int index; /* current index in the dll path list */
64 char *buffer; /* buffer used for storing path names */
65 char *name; /* start of file name part in buffer (including leading slash) */
66 int namelen; /* length of file name without .so extension */
67 int win16; /* 16-bit dll search */
74 const IMAGE_NT_HEADERS *nt; /* NT header */
75 const char *filename; /* DLL file name */
76 } builtin_dlls[MAX_DLLS];
80 static const IMAGE_NT_HEADERS *main_exe;
82 static load_dll_callback_t load_dll_callback;
84 static const char *build_dir;
85 static const char *default_dlldir;
86 static const char **dll_paths;
87 static unsigned int nb_dll_paths;
88 static int dll_path_maxlen;
90 extern void mmap_init(void);
91 extern const char *get_dlldir( const char **default_dlldir );
93 /* build the dll load path from the WINEDLLPATH variable */
94 static void build_dll_path(void)
97 char *p, *path = getenv( "WINEDLLPATH" );
98 const char *dlldir = get_dlldir( &default_dlldir );
102 /* count how many path elements we need */
107 while (*p == ':') p++;
110 while (*p && *p != ':') p++;
114 dll_paths = malloc( (count+2) * sizeof(*dll_paths) );
119 dll_path_maxlen = strlen(dlldir);
120 dll_paths[nb_dll_paths++] = dlldir;
122 else if ((build_dir = wine_get_build_dir()))
124 dll_path_maxlen = strlen(build_dir) + sizeof("/programs");
132 while (*p == ':') *p++ = 0;
134 dll_paths[nb_dll_paths] = p;
135 while (*p && *p != ':') p++;
136 if (p - dll_paths[nb_dll_paths] > dll_path_maxlen)
137 dll_path_maxlen = p - dll_paths[nb_dll_paths];
142 /* append default dll dir (if not empty) to path */
143 if ((len = strlen(default_dlldir)) > 0)
145 if (len > dll_path_maxlen) dll_path_maxlen = len;
146 dll_paths[nb_dll_paths++] = default_dlldir;
150 /* check if a given file can be opened */
151 static inline int file_exists( const char *name )
153 int fd = open( name, O_RDONLY );
154 if (fd != -1) close( fd );
158 static inline char *prepend( char *buffer, const char *str, size_t len )
160 return memcpy( buffer - len, str, len );
163 /* get a filename from the next entry in the dll path */
164 static char *next_dll_path( struct dll_path_context *context )
166 unsigned int index = context->index++;
167 int namelen = context->namelen;
168 char *path = context->name;
172 case 0: /* try programs dir for .exe files */
173 if (!context->win16 && namelen > 4 && !memcmp( context->name + namelen - 4, ".exe", 4 ))
175 path = prepend( path, context->name, namelen - 4 );
176 path = prepend( path, "/programs", sizeof("/programs") - 1 );
177 path = prepend( path, build_dir, strlen(build_dir) );
182 case 1: /* try dlls dir with subdir prefix */
183 if (namelen > 4 && !memcmp( context->name + namelen - 4, ".dll", 4 )) namelen -= 4;
184 if (!context->win16) path = prepend( path, context->name, namelen );
185 path = prepend( path, "/dlls", sizeof("/dlls") - 1 );
186 path = prepend( path, build_dir, strlen(build_dir) );
190 if (index < nb_dll_paths)
191 return prepend( context->name, dll_paths[index], strlen( dll_paths[index] ));
198 /* get a filename from the first entry in the dll path */
199 static char *first_dll_path( const char *name, int win16, struct dll_path_context *context )
202 int namelen = strlen( name );
203 const char *ext = win16 ? "16" : ".so";
205 context->buffer = malloc( dll_path_maxlen + 2 * namelen + strlen(ext) + 3 );
206 context->index = build_dir ? 0 : 2; /* if no build dir skip all the build dir magic cases */
207 context->name = context->buffer + dll_path_maxlen + namelen + 1;
208 context->namelen = namelen + 1;
209 context->win16 = win16;
211 /* store the name at the end of the buffer, followed by extension */
214 memcpy( p, name, namelen );
215 strcpy( p + namelen, ext );
216 return next_dll_path( context );
220 /* free the dll path context created by first_dll_path */
221 static inline void free_dll_path( struct dll_path_context *context )
223 free( context->buffer );
227 /* open a library for a given dll, searching in the dll path
228 * 'name' must be the Windows dll name (e.g. "kernel32.dll") */
229 static void *dlopen_dll( const char *name, char *error, int errorsize,
230 int test_only, int *exists )
232 struct dll_path_context context;
237 for (path = first_dll_path( name, 0, &context ); path; path = next_dll_path( &context ))
239 if (!test_only && (ret = wine_dlopen( path, RTLD_NOW, error, errorsize ))) break;
240 if ((*exists = file_exists( path ))) break; /* exists but cannot be loaded, return the error */
242 free_dll_path( &context );
247 /* adjust an array of pointers to make them into RVAs */
248 static inline void fixup_rva_ptrs( void *array, BYTE *base, unsigned int count )
250 void **src = (void **)array;
251 DWORD *dst = (DWORD *)array;
254 *dst++ = *src ? (BYTE *)*src - base : 0;
259 /* fixup an array of RVAs by adding the specified delta */
260 static inline void fixup_rva_dwords( DWORD *ptr, int delta, unsigned int count )
264 if (*ptr) *ptr += delta;
270 /* fixup RVAs in the import directory */
271 static void fixup_imports( IMAGE_IMPORT_DESCRIPTOR *dir, BYTE *base, int delta )
277 fixup_rva_dwords( &dir->u.OriginalFirstThunk, delta, 1 );
278 fixup_rva_dwords( &dir->Name, delta, 1 );
279 fixup_rva_dwords( &dir->FirstThunk, delta, 1 );
280 ptr = (UINT_PTR *)(base + dir->FirstThunk);
283 if (!(*ptr & IMAGE_ORDINAL_FLAG)) *ptr += delta;
291 /* fixup RVAs in the export directory */
292 static void fixup_exports( IMAGE_EXPORT_DIRECTORY *dir, BYTE *base, int delta )
294 fixup_rva_dwords( &dir->Name, delta, 1 );
295 fixup_rva_dwords( &dir->AddressOfFunctions, delta, 1 );
296 fixup_rva_dwords( &dir->AddressOfNames, delta, 1 );
297 fixup_rva_dwords( &dir->AddressOfNameOrdinals, delta, 1 );
298 fixup_rva_dwords( (DWORD *)(base + dir->AddressOfNames), delta, dir->NumberOfNames );
299 fixup_rva_ptrs( (base + dir->AddressOfFunctions), base, dir->NumberOfFunctions );
303 /* fixup RVAs in the resource directory */
304 static void fixup_resources( IMAGE_RESOURCE_DIRECTORY *dir, BYTE *root, int delta )
306 IMAGE_RESOURCE_DIRECTORY_ENTRY *entry;
309 entry = (IMAGE_RESOURCE_DIRECTORY_ENTRY *)(dir + 1);
310 for (i = 0; i < dir->NumberOfNamedEntries + dir->NumberOfIdEntries; i++, entry++)
312 void *ptr = root + entry->u2.s3.OffsetToDirectory;
313 if (entry->u2.s3.DataIsDirectory) fixup_resources( ptr, root, delta );
316 IMAGE_RESOURCE_DATA_ENTRY *data = ptr;
317 fixup_rva_dwords( &data->OffsetToData, delta, 1 );
323 /* map a builtin dll in memory and fixup RVAs */
324 static void *map_dll( const IMAGE_NT_HEADERS *nt_descr )
327 IMAGE_DATA_DIRECTORY *dir;
328 IMAGE_DOS_HEADER *dos;
329 IMAGE_NT_HEADERS *nt;
330 IMAGE_SECTION_HEADER *sec;
332 DWORD code_start, data_start, data_end;
333 const size_t page_size = getpagesize();
334 const size_t page_mask = page_size - 1;
335 int delta, nb_sections = 2; /* code + data */
338 size_t size = (sizeof(IMAGE_DOS_HEADER)
339 + sizeof(IMAGE_NT_HEADERS)
340 + nb_sections * sizeof(IMAGE_SECTION_HEADER));
342 assert( size <= page_size );
344 /* module address must be aligned on 64K boundary */
345 addr = (BYTE *)((nt_descr->OptionalHeader.ImageBase + 0xffff) & ~0xffff);
346 if (wine_anon_mmap( addr, page_size, PROT_READ|PROT_WRITE, MAP_FIXED ) != addr) return NULL;
348 dos = (IMAGE_DOS_HEADER *)addr;
349 nt = (IMAGE_NT_HEADERS *)(dos + 1);
350 sec = (IMAGE_SECTION_HEADER *)(nt + 1);
352 /* Build the DOS and NT headers */
354 dos->e_magic = IMAGE_DOS_SIGNATURE;
357 dos->e_cparhdr = (sizeof(*dos)+0xf)/0x10;
359 dos->e_maxalloc = 0xffff;
362 dos->e_lfarlc = sizeof(*dos);
363 dos->e_lfanew = sizeof(*dos);
367 delta = (const BYTE *)nt_descr - addr;
368 code_start = page_size;
369 data_start = delta & ~page_mask;
370 data_end = (nt->OptionalHeader.SizeOfImage + delta + page_mask) & ~page_mask;
372 fixup_rva_ptrs( &nt->OptionalHeader.AddressOfEntryPoint, addr, 1 );
374 nt->FileHeader.NumberOfSections = nb_sections;
375 nt->OptionalHeader.BaseOfCode = code_start;
377 nt->OptionalHeader.BaseOfData = data_start;
379 nt->OptionalHeader.SizeOfCode = data_start - code_start;
380 nt->OptionalHeader.SizeOfInitializedData = data_end - data_start;
381 nt->OptionalHeader.SizeOfUninitializedData = 0;
382 nt->OptionalHeader.SizeOfImage = data_end;
383 nt->OptionalHeader.ImageBase = (ULONG_PTR)addr;
385 /* Build the code section */
387 memcpy( sec->Name, ".text", sizeof(".text") );
388 sec->SizeOfRawData = data_start - code_start;
389 sec->Misc.VirtualSize = sec->SizeOfRawData;
390 sec->VirtualAddress = code_start;
391 sec->PointerToRawData = code_start;
392 sec->Characteristics = (IMAGE_SCN_CNT_CODE | IMAGE_SCN_MEM_EXECUTE | IMAGE_SCN_MEM_READ);
395 /* Build the data section */
397 memcpy( sec->Name, ".data", sizeof(".data") );
398 sec->SizeOfRawData = data_end - data_start;
399 sec->Misc.VirtualSize = sec->SizeOfRawData;
400 sec->VirtualAddress = data_start;
401 sec->PointerToRawData = data_start;
402 sec->Characteristics = (IMAGE_SCN_CNT_INITIALIZED_DATA |
403 IMAGE_SCN_MEM_WRITE | IMAGE_SCN_MEM_READ);
406 for (i = 0; i < nt->OptionalHeader.NumberOfRvaAndSizes; i++)
407 fixup_rva_dwords( &nt->OptionalHeader.DataDirectory[i].VirtualAddress, delta, 1 );
409 /* Build the import directory */
411 dir = &nt->OptionalHeader.DataDirectory[IMAGE_FILE_IMPORT_DIRECTORY];
414 IMAGE_IMPORT_DESCRIPTOR *imports = (void *)(addr + dir->VirtualAddress);
415 fixup_imports( imports, addr, delta );
418 /* Build the resource directory */
420 dir = &nt->OptionalHeader.DataDirectory[IMAGE_FILE_RESOURCE_DIRECTORY];
423 void *ptr = (void *)(addr + dir->VirtualAddress);
424 fixup_resources( ptr, ptr, delta );
427 /* Build the export directory */
429 dir = &nt->OptionalHeader.DataDirectory[IMAGE_FILE_EXPORT_DIRECTORY];
432 IMAGE_EXPORT_DIRECTORY *exports = (void *)(addr + dir->VirtualAddress);
433 fixup_exports( exports, addr, delta );
436 #else /* HAVE_MMAP */
438 #endif /* HAVE_MMAP */
442 /***********************************************************************
443 * __wine_dll_register
445 * Register a built-in DLL descriptor.
447 void __wine_dll_register( const IMAGE_NT_HEADERS *header, const char *filename )
449 if (load_dll_callback) load_dll_callback( map_dll(header), filename );
452 if (!(header->FileHeader.Characteristics & IMAGE_FILE_DLL))
456 assert( nb_dlls < MAX_DLLS );
457 builtin_dlls[nb_dlls].nt = header;
458 builtin_dlls[nb_dlls].filename = filename;
465 /***********************************************************************
466 * wine_dll_set_callback
468 * Set the callback function for dll loading, and call it
469 * for all dlls that were implicitly loaded already.
471 void wine_dll_set_callback( load_dll_callback_t load )
474 load_dll_callback = load;
475 for (i = 0; i < nb_dlls; i++)
477 const IMAGE_NT_HEADERS *nt = builtin_dlls[i].nt;
479 builtin_dlls[i].nt = NULL;
480 load_dll_callback( map_dll(nt), builtin_dlls[i].filename );
483 if (main_exe) load_dll_callback( map_dll(main_exe), "" );
487 /***********************************************************************
490 * Load a builtin dll.
492 void *wine_dll_load( const char *filename, char *error, int errorsize, int *file_exists )
496 /* callback must have been set already */
497 assert( load_dll_callback );
499 /* check if we have it in the list */
500 /* this can happen when initializing pre-loaded dlls in wine_dll_set_callback */
501 for (i = 0; i < nb_dlls; i++)
503 if (!builtin_dlls[i].nt) continue;
504 if (!strcmp( builtin_dlls[i].filename, filename ))
506 const IMAGE_NT_HEADERS *nt = builtin_dlls[i].nt;
507 builtin_dlls[i].nt = NULL;
508 load_dll_callback( map_dll(nt), builtin_dlls[i].filename );
513 return dlopen_dll( filename, error, errorsize, 0, file_exists );
517 /***********************************************************************
520 * Unload a builtin dll.
522 void wine_dll_unload( void *handle )
524 if (handle != (void *)1)
525 wine_dlclose( handle, NULL, 0 );
529 /***********************************************************************
530 * wine_dll_load_main_exe
532 * Try to load the .so for the main exe.
534 void *wine_dll_load_main_exe( const char *name, char *error, int errorsize,
535 int test_only, int *file_exists )
537 return dlopen_dll( name, error, errorsize, test_only, file_exists );
541 /***********************************************************************
542 * wine_dll_enum_load_path
544 * Enumerate the dll load path.
546 const char *wine_dll_enum_load_path( unsigned int index )
548 if (index >= nb_dll_paths) return NULL;
549 return dll_paths[index];
553 /***********************************************************************
556 * Retrieve the name of the 32-bit owner dll for a 16-bit dll.
557 * Return 0 if OK, -1 on error.
559 int wine_dll_get_owner( const char *name, char *buffer, int size, int *exists )
563 struct dll_path_context context;
567 for (path = first_dll_path( name, 1, &context ); path; path = next_dll_path( &context ))
569 int fd = open( path, O_RDONLY );
572 int res = read( fd, buffer, size - 1 );
573 while (res > 0 && (buffer[res-1] == '\n' || buffer[res-1] == '\r')) res--;
581 free_dll_path( &context );
586 /***********************************************************************
589 * Set a user limit to the maximum allowed value.
591 static void set_max_limit( int limit )
593 #ifdef HAVE_SETRLIMIT
594 struct rlimit rlimit;
596 if (!getrlimit( limit, &rlimit ))
598 rlimit.rlim_cur = rlimit.rlim_max;
599 setrlimit( limit, &rlimit );
605 /***********************************************************************
608 * Main Wine initialisation.
610 void wine_init( int argc, char *argv[], char *error, int error_size )
612 struct dll_path_context context;
615 void (*init_func)(void);
617 /* force a few limits that are set too low on some platforms */
619 set_max_limit( RLIMIT_NOFILE );
622 set_max_limit( RLIMIT_AS );
625 wine_init_argv0_path( argv[0] );
627 __wine_main_argc = argc;
628 __wine_main_argv = argv;
629 __wine_main_environ = environ;
632 for (path = first_dll_path( "ntdll.dll", 0, &context ); path; path = next_dll_path( &context ))
634 if ((ntdll = wine_dlopen( path, RTLD_NOW, error, error_size )))
636 /* if we didn't use the default dll dir, remove it from the search path */
637 if (default_dlldir[0] && context.index < nb_dll_paths + 2) nb_dll_paths--;
641 free_dll_path( &context );
644 if (!(init_func = wine_dlsym( ntdll, "__wine_process_init", error, error_size ))) return;
650 * These functions provide wrappers around dlopen() and associated
651 * functions. They work around a bug in glibc 2.1.x where calling
652 * a dl*() function after a previous dl*() function has failed
653 * without a dlerror() call between the two will cause a crash.
654 * They all take a pointer to a buffer that
655 * will receive the error description (from dlerror()). This
656 * parameter may be NULL if the error description is not required.
663 /***********************************************************************
666 void *wine_dlopen( const char *filename, int flag, char *error, size_t errorsize )
673 /* the Mac OS loader pretends to be able to load PE files, so avoid them here */
674 unsigned char magic[2];
675 int fd = open( filename, O_RDONLY );
678 if (pread( fd, magic, 2, 0 ) == 2 && magic[0] == 'M' && magic[1] == 'Z')
680 static const char msg[] = "MZ format";
681 size_t len = min( errorsize, sizeof(msg) );
682 memcpy( error, msg, len );
690 dlerror(); dlerror();
692 if (strchr( filename, ':' ))
695 /* Solaris' brain damaged dlopen() treats ':' as a path separator */
696 realpath( filename, path );
697 ret = dlopen( path, flag | RTLD_FIRST );
701 ret = dlopen( filename, flag | RTLD_FIRST );
703 if (error && errorsize)
707 size_t len = strlen(s);
708 if (len >= errorsize) len = errorsize - 1;
709 memcpy( error, s, len );
719 static const char msg[] = "dlopen interface not detected by configure";
720 size_t len = min( errorsize, sizeof(msg) );
721 memcpy( error, msg, len );
728 /***********************************************************************
731 void *wine_dlsym( void *handle, const char *symbol, char *error, size_t errorsize )
736 dlerror(); dlerror();
737 ret = dlsym( handle, symbol );
739 if (error && errorsize)
743 size_t len = strlen(s);
744 if (len >= errorsize) len = errorsize - 1;
745 memcpy( error, s, len );
755 static const char msg[] = "dlopen interface not detected by configure";
756 size_t len = min( errorsize, sizeof(msg) );
757 memcpy( error, msg, len );
764 /***********************************************************************
767 int wine_dlclose( void *handle, char *error, size_t errorsize )
772 dlerror(); dlerror();
773 ret = dlclose( handle );
775 if (error && errorsize)
779 size_t len = strlen(s);
780 if (len >= errorsize) len = errorsize - 1;
781 memcpy( error, s, len );
791 static const char msg[] = "dlopen interface not detected by configure";
792 size_t len = min( errorsize, sizeof(msg) );
793 memcpy( error, msg, len );