libs/wine/loader.c

   1 /*
   2  * Win32 builtin dlls support
   3  *
   4  * Copyright 2000 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 <assert.h>
  25 #include <ctype.h>
  26 #include <fcntl.h>
  27 #include <limits.h>
  28 #include <stdarg.h>
  29 #include <stdlib.h>
  30 #include <string.h>
  31 #include <sys/types.h>
  32 #ifdef HAVE_SYS_MMAN_H
  33 #include <sys/mman.h>
  34 #endif
  35 #ifdef HAVE_SYS_RESOURCE_H
  36 # include <sys/resource.h>
  37 #endif
  38 #ifdef HAVE_UNISTD_H
  39 # include <unistd.h>
  40 #endif
  41
  42 #ifdef __APPLE__
  43 #include <crt_externs.h>
  44 #define environ (*_NSGetEnviron())
  45 #include <CoreFoundation/CoreFoundation.h>
  46 #define LoadResource MacLoadResource
  47 #define GetCurrentThread MacGetCurrentThread
  48 #include <CoreServices/CoreServices.h>
  49 #undef LoadResource
  50 #undef GetCurrentThread
  51 #include <pthread.h>
  52 #include <mach-o/getsect.h>
  53 #else
  54 extern char **environ;
  55 #endif
  56
  57 #ifdef __ANDROID__
  58 #include <jni.h>
  59 #endif
  60
  61 #define NONAMELESSUNION
  62 #define NONAMELESSSTRUCT
  63 #include "windef.h"
  64 #include "winbase.h"
  65 #include "wine/library.h"
  66
  67 /* argc/argv for the Windows application */
  68 int __wine_main_argc = 0;
  69 char **__wine_main_argv = NULL;
  70 WCHAR **__wine_main_wargv = NULL;
  71 char **__wine_main_environ = NULL;
  72
  73 struct dll_path_context
  74 {
  75     unsigned int index; /* current index in the dll path list */
  76     char *buffer;       /* buffer used for storing path names */
  77     char *name;         /* start of file name part in buffer (including leading slash) */
  78     int   namelen;      /* length of file name without .so extension */
  79     int   win16;        /* 16-bit dll search */
  80 };
  81
  82 #define MAX_DLLS 100
  83
  84 static struct
  85 {
  86     const IMAGE_NT_HEADERS *nt;           /* NT header */
  87     const char             *filename;     /* DLL file name */
  88 } builtin_dlls[MAX_DLLS];
  89
  90 static int nb_dlls;
  91
  92 static const IMAGE_NT_HEADERS *main_exe;
  93
  94 static load_dll_callback_t load_dll_callback;
  95
  96 static const char *build_dir;
  97 static const char *default_dlldir;
  98 static const char **dll_paths;
  99 static unsigned int nb_dll_paths;
 100 static int dll_path_maxlen;
 101
 102 extern void mmap_init(void);
 103 extern const char *get_dlldir( const char **default_dlldir );
 104
 105 /* build the dll load path from the WINEDLLPATH variable */
 106 static void build_dll_path(void)
 107 {
 108     int len, count = 0;
 109     char *p, *path = getenv( "WINEDLLPATH" );
 110     const char *dlldir = get_dlldir( &default_dlldir );
 111
 112     if (path)
 113     {
 114         /* count how many path elements we need */
 115         path = strdup(path);
 116         p = path;
 117         while (*p)
 118         {
 119             while (*p == ':') p++;
 120             if (!*p) break;
 121             count++;
 122             while (*p && *p != ':') p++;
 123         }
 124     }
 125
 126     dll_paths = malloc( (count+2) * sizeof(*dll_paths) );
 127     nb_dll_paths = 0;
 128
 129     if (dlldir)
 130     {
 131         dll_path_maxlen = strlen(dlldir);
 132         dll_paths[nb_dll_paths++] = dlldir;
 133     }
 134     else if ((build_dir = wine_get_build_dir()))
 135     {
 136         dll_path_maxlen = strlen(build_dir) + sizeof("/programs");
 137     }
 138
 139     if (count)
 140     {
 141         p = path;
 142         while (*p)
 143         {
 144             while (*p == ':') *p++ = 0;
 145             if (!*p) break;
 146             dll_paths[nb_dll_paths] = p;
 147             while (*p && *p != ':') p++;
 148             if (p - dll_paths[nb_dll_paths] > dll_path_maxlen)
 149                 dll_path_maxlen = p - dll_paths[nb_dll_paths];
 150             nb_dll_paths++;
 151         }
 152     }
 153
 154     /* append default dll dir (if not empty) to path */
 155     if ((len = strlen(default_dlldir)) > 0)
 156     {
 157         if (len > dll_path_maxlen) dll_path_maxlen = len;
 158         dll_paths[nb_dll_paths++] = default_dlldir;
 159     }
 160 }
 161
 162 /* check if the library is the correct architecture */
 163 /* only returns false for a valid library of the wrong arch */
 164 static int check_library_arch( int fd )
 165 {
 166 #ifdef __APPLE__
 167     struct  /* Mach-O header */
 168     {
 169         unsigned int magic;
 170         unsigned int cputype;
 171     } header;
 172
 173     if (read( fd, &header, sizeof(header) ) != sizeof(header)) return 1;
 174     if (header.magic != 0xfeedface) return 1;
 175     if (sizeof(void *) == sizeof(int)) return !(header.cputype >> 24);
 176     else return (header.cputype >> 24) == 1; /* CPU_ARCH_ABI64 */
 177 #else
 178     struct  /* ELF header */
 179     {
 180         unsigned char magic[4];
 181         unsigned char class;
 182         unsigned char data;
 183         unsigned char version;
 184     } header;
 185
 186     if (read( fd, &header, sizeof(header) ) != sizeof(header)) return 1;
 187     if (memcmp( header.magic, "\177ELF", 4 )) return 1;
 188     if (header.version != 1 /* EV_CURRENT */) return 1;
 189 #ifdef WORDS_BIGENDIAN
 190     if (header.data != 2 /* ELFDATA2MSB */) return 1;
 191 #else
 192     if (header.data != 1 /* ELFDATA2LSB */) return 1;
 193 #endif
 194     if (sizeof(void *) == sizeof(int)) return header.class == 1; /* ELFCLASS32 */
 195     else return header.class == 2; /* ELFCLASS64 */
 196 #endif
 197 }
 198
 199 /* check if a given file can be opened */
 200 static inline int file_exists( const char *name )
 201 {
 202     int ret = 0;
 203     int fd = open( name, O_RDONLY );
 204     if (fd != -1)
 205     {
 206         ret = check_library_arch( fd );
 207         close( fd );
 208     }
 209     return ret;
 210 }
 211
 212 static inline char *prepend( char *buffer, const char *str, size_t len )
 213 {
 214     return memcpy( buffer - len, str, len );
 215 }
 216
 217 /* get a filename from the next entry in the dll path */
 218 static char *next_dll_path( struct dll_path_context *context )
 219 {
 220     unsigned int index = context->index++;
 221     int namelen = context->namelen;
 222     char *path = context->name;
 223
 224     switch(index)
 225     {
 226     case 0:  /* try dlls dir with subdir prefix */
 227         if (namelen > 4 && !memcmp( context->name + namelen - 4, ".dll", 4 )) namelen -= 4;
 228         if (!context->win16) path = prepend( path, context->name, namelen );
 229         path = prepend( path, "/dlls", sizeof("/dlls") - 1 );
 230         path = prepend( path, build_dir, strlen(build_dir) );
 231         return path;
 232     case 1:  /* try programs dir with subdir prefix */
 233         if (!context->win16)
 234         {
 235             if (namelen > 4 && !memcmp( context->name + namelen - 4, ".exe", 4 )) namelen -= 4;
 236             path = prepend( path, context->name, namelen );
 237             path = prepend( path, "/programs", sizeof("/programs") - 1 );
 238             path = prepend( path, build_dir, strlen(build_dir) );
 239             return path;
 240         }
 241         context->index++;
 242         /* fall through */
 243     default:
 244         index -= 2;
 245         if (index >= nb_dll_paths) return NULL;
 246         path = prepend( path, dll_paths[index], strlen( dll_paths[index] ));
 247         return path;
 248     }
 249 }
 250
 251
 252 /* get a filename from the first entry in the dll path */
 253 static char *first_dll_path( const char *name, int win16, struct dll_path_context *context )
 254 {
 255     char *p;
 256     int namelen = strlen( name );
 257     const char *ext = win16 ? "16" : ".so";
 258
 259     context->buffer = malloc( dll_path_maxlen + 2 * namelen + strlen(ext) + 3 );
 260     context->index = build_dir ? 0 : 2;  /* if no build dir skip all the build dir magic cases */
 261     context->name = context->buffer + dll_path_maxlen + namelen + 1;
 262     context->namelen = namelen + 1;
 263     context->win16 = win16;
 264
 265     /* store the name at the end of the buffer, followed by extension */
 266     p = context->name;
 267     *p++ = '/';
 268     memcpy( p, name, namelen );
 269     strcpy( p + namelen, ext );
 270     return next_dll_path( context );
 271 }
 272
 273
 274 /* free the dll path context created by first_dll_path */
 275 static inline void free_dll_path( struct dll_path_context *context )
 276 {
 277     free( context->buffer );
 278 }
 279
 280
 281 /* open a library for a given dll, searching in the dll path
 282  * 'name' must be the Windows dll name (e.g. "kernel32.dll") */
 283 static void *dlopen_dll( const char *name, char *error, int errorsize,
 284                          int test_only, int *exists )
 285 {
 286     struct dll_path_context context;
 287     char *path;
 288     void *ret = NULL;
 289
 290     *exists = 0;
 291     for (path = first_dll_path( name, 0, &context ); path; path = next_dll_path( &context ))
 292     {
 293         if (!test_only && (ret = wine_dlopen( path, RTLD_NOW, error, errorsize ))) break;
 294         if ((*exists = file_exists( path ))) break; /* exists but cannot be loaded, return the error */
 295     }
 296     free_dll_path( &context );
 297     return ret;
 298 }
 299
 300
 301 /* adjust an array of pointers to make them into RVAs */
 302 static inline void fixup_rva_ptrs( void *array, BYTE *base, unsigned int count )
 303 {
 304     void **src = (void **)array;
 305     DWORD *dst = (DWORD *)array;
 306     while (count--)
 307     {
 308         *dst++ = *src ? (BYTE *)*src - base : 0;
 309         src++;
 310     }
 311 }
 312
 313 /* fixup an array of RVAs by adding the specified delta */
 314 static inline void fixup_rva_dwords( DWORD *ptr, int delta, unsigned int count )
 315 {
 316     while (count--)
 317     {
 318         if (*ptr) *ptr += delta;
 319         ptr++;
 320     }
 321 }
 322
 323
 324 /* fixup an array of name/ordinal RVAs by adding the specified delta */
 325 static inline void fixup_rva_names( UINT_PTR *ptr, int delta )
 326 {
 327     while (*ptr)
 328     {
 329         if (!(*ptr & IMAGE_ORDINAL_FLAG)) *ptr += delta;
 330         ptr++;
 331     }
 332 }
 333
 334
 335 /* fixup RVAs in the import directory */
 336 static void fixup_imports( IMAGE_IMPORT_DESCRIPTOR *dir, BYTE *base, int delta )
 337 {
 338     while (dir->Name)
 339     {
 340         fixup_rva_dwords( &dir->u.OriginalFirstThunk, delta, 1 );
 341         fixup_rva_dwords( &dir->Name, delta, 1 );
 342         fixup_rva_dwords( &dir->FirstThunk, delta, 1 );
 343         if (dir->u.OriginalFirstThunk) fixup_rva_names( (UINT_PTR *)(base + dir->u.OriginalFirstThunk), delta );
 344         if (dir->FirstThunk) fixup_rva_names( (UINT_PTR *)(base + dir->FirstThunk), delta );
 345         dir++;
 346     }
 347 }
 348
 349
 350 /* fixup RVAs in the export directory */
 351 static void fixup_exports( IMAGE_EXPORT_DIRECTORY *dir, BYTE *base, int delta )
 352 {
 353     fixup_rva_dwords( &dir->Name, delta, 1 );
 354     fixup_rva_dwords( &dir->AddressOfFunctions, delta, 1 );
 355     fixup_rva_dwords( &dir->AddressOfNames, delta, 1 );
 356     fixup_rva_dwords( &dir->AddressOfNameOrdinals, delta, 1 );
 357     fixup_rva_dwords( (DWORD *)(base + dir->AddressOfNames), delta, dir->NumberOfNames );
 358     fixup_rva_ptrs( (base + dir->AddressOfFunctions), base, dir->NumberOfFunctions );
 359 }
 360
 361
 362 /* fixup RVAs in the resource directory */
 363 static void fixup_resources( IMAGE_RESOURCE_DIRECTORY *dir, BYTE *root, int delta )
 364 {
 365     IMAGE_RESOURCE_DIRECTORY_ENTRY *entry;
 366     int i;
 367
 368     entry = (IMAGE_RESOURCE_DIRECTORY_ENTRY *)(dir + 1);
 369     for (i = 0; i < dir->NumberOfNamedEntries + dir->NumberOfIdEntries; i++, entry++)
 370     {
 371         void *ptr = root + entry->u2.s2.OffsetToDirectory;
 372         if (entry->u2.s2.DataIsDirectory) fixup_resources( ptr, root, delta );
 373         else
 374         {
 375             IMAGE_RESOURCE_DATA_ENTRY *data = ptr;
 376             fixup_rva_dwords( &data->OffsetToData, delta, 1 );
 377         }
 378     }
 379 }
 380
 381
 382 /* map a builtin dll in memory and fixup RVAs */
 383 static void *map_dll( const IMAGE_NT_HEADERS *nt_descr )
 384 {
 385 #ifdef HAVE_MMAP
 386     IMAGE_DATA_DIRECTORY *dir;
 387     IMAGE_DOS_HEADER *dos;
 388     IMAGE_NT_HEADERS *nt;
 389     IMAGE_SECTION_HEADER *sec;
 390     BYTE *addr;
 391     DWORD code_start, code_end, data_start, data_end;
 392     const size_t page_size = sysconf( _SC_PAGESIZE );
 393     const size_t page_mask = page_size - 1;
 394     int delta, nb_sections = 2;  /* code + data */
 395     unsigned int i;
 396 #ifdef __APPLE__
 397     Dl_info dli;
 398     unsigned long data_size;
 399 #endif
 400
 401     size_t size = (sizeof(IMAGE_DOS_HEADER)
 402                    + sizeof(IMAGE_NT_HEADERS)
 403                    + nb_sections * sizeof(IMAGE_SECTION_HEADER));
 404
 405     assert( size <= page_size );
 406
 407     /* module address must be aligned on 64K boundary */
 408     addr = (BYTE *)((nt_descr->OptionalHeader.ImageBase + 0xffff) & ~0xffff);
 409     if (wine_anon_mmap( addr, page_size, PROT_READ|PROT_WRITE, MAP_FIXED ) != addr) return NULL;
 410
 411     dos    = (IMAGE_DOS_HEADER *)addr;
 412     nt     = (IMAGE_NT_HEADERS *)(dos + 1);
 413     sec    = (IMAGE_SECTION_HEADER *)(nt + 1);
 414
 415     /* Build the DOS and NT headers */
 416
 417     dos->e_magic    = IMAGE_DOS_SIGNATURE;
 418     dos->e_cblp     = 0x90;
 419     dos->e_cp       = 3;
 420     dos->e_cparhdr  = (sizeof(*dos)+0xf)/0x10;
 421     dos->e_minalloc = 0;
 422     dos->e_maxalloc = 0xffff;
 423     dos->e_ss       = 0x0000;
 424     dos->e_sp       = 0x00b8;
 425     dos->e_lfarlc   = sizeof(*dos);
 426     dos->e_lfanew   = sizeof(*dos);
 427
 428     *nt = *nt_descr;
 429
 430     delta      = (const BYTE *)nt_descr - addr;
 431     code_start = page_size;
 432     data_start = delta & ~page_mask;
 433 #ifdef __APPLE__
 434     /* Need the mach_header, not the PE header, to give to getsegmentdata(3) */
 435     dladdr(addr, &dli);
 436     code_end   = getsegmentdata(dli.dli_fbase, "__DATA", &data_size) - addr;
 437     data_end   = (code_end + data_size + page_mask) & ~page_mask;
 438 #else
 439     code_end   = data_start;
 440     data_end   = (nt->OptionalHeader.SizeOfImage + delta + page_mask) & ~page_mask;
 441 #endif
 442
 443     fixup_rva_ptrs( &nt->OptionalHeader.AddressOfEntryPoint, addr, 1 );
 444
 445     nt->FileHeader.NumberOfSections                = nb_sections;
 446     nt->OptionalHeader.BaseOfCode                  = code_start;
 447 #ifndef _WIN64
 448     nt->OptionalHeader.BaseOfData                  = data_start;
 449 #endif
 450     nt->OptionalHeader.SizeOfCode                  = code_end - code_start;
 451     nt->OptionalHeader.SizeOfInitializedData       = data_end - data_start;
 452     nt->OptionalHeader.SizeOfUninitializedData     = 0;
 453     nt->OptionalHeader.SizeOfImage                 = data_end;
 454     nt->OptionalHeader.ImageBase                   = (ULONG_PTR)addr;
 455
 456     /* Build the code section */
 457
 458     memcpy( sec->Name, ".text", sizeof(".text") );
 459     sec->SizeOfRawData = code_end - code_start;
 460     sec->Misc.VirtualSize = sec->SizeOfRawData;
 461     sec->VirtualAddress   = code_start;
 462     sec->PointerToRawData = code_start;
 463     sec->Characteristics  = (IMAGE_SCN_CNT_CODE | IMAGE_SCN_MEM_EXECUTE | IMAGE_SCN_MEM_READ);
 464     sec++;
 465
 466     /* Build the data section */
 467
 468     memcpy( sec->Name, ".data", sizeof(".data") );
 469     sec->SizeOfRawData = data_end - data_start;
 470     sec->Misc.VirtualSize = sec->SizeOfRawData;
 471     sec->VirtualAddress   = data_start;
 472     sec->PointerToRawData = data_start;
 473     sec->Characteristics  = (IMAGE_SCN_CNT_INITIALIZED_DATA |
 474                              IMAGE_SCN_MEM_WRITE | IMAGE_SCN_MEM_READ);
 475     sec++;
 476
 477     for (i = 0; i < nt->OptionalHeader.NumberOfRvaAndSizes; i++)
 478         fixup_rva_dwords( &nt->OptionalHeader.DataDirectory[i].VirtualAddress, delta, 1 );
 479
 480     /* Build the import directory */
 481
 482     dir = &nt->OptionalHeader.DataDirectory[IMAGE_FILE_IMPORT_DIRECTORY];
 483     if (dir->Size)
 484     {
 485         IMAGE_IMPORT_DESCRIPTOR *imports = (void *)(addr + dir->VirtualAddress);
 486         fixup_imports( imports, addr, delta );
 487     }
 488
 489     /* Build the resource directory */
 490
 491     dir = &nt->OptionalHeader.DataDirectory[IMAGE_FILE_RESOURCE_DIRECTORY];
 492     if (dir->Size)
 493     {
 494         void *ptr = (void *)(addr + dir->VirtualAddress);
 495         fixup_resources( ptr, ptr, delta );
 496     }
 497
 498     /* Build the export directory */
 499
 500     dir = &nt->OptionalHeader.DataDirectory[IMAGE_FILE_EXPORT_DIRECTORY];
 501     if (dir->Size)
 502     {
 503         IMAGE_EXPORT_DIRECTORY *exports = (void *)(addr + dir->VirtualAddress);
 504         fixup_exports( exports, addr, delta );
 505     }
 506     return addr;
 507 #else  /* HAVE_MMAP */
 508     return NULL;
 509 #endif  /* HAVE_MMAP */
 510 }
 511
 512
 513 /***********************************************************************
 514  *           __wine_get_main_environment
 515  *
 516  * Return an environment pointer to work around lack of environ variable.
 517  * Only exported on Mac OS.
 518  */
 519 char **__wine_get_main_environment(void)
 520 {
 521     return environ;
 522 }
 523
 524
 525 /***********************************************************************
 526  *           __wine_dll_register
 527  *
 528  * Register a built-in DLL descriptor.
 529  */
 530 void __wine_dll_register( const IMAGE_NT_HEADERS *header, const char *filename )
 531 {
 532     if (load_dll_callback) load_dll_callback( map_dll(header), filename );
 533     else
 534     {
 535         if (!(header->FileHeader.Characteristics & IMAGE_FILE_DLL))
 536             main_exe = header;
 537         else
 538         {
 539             assert( nb_dlls < MAX_DLLS );
 540             builtin_dlls[nb_dlls].nt = header;
 541             builtin_dlls[nb_dlls].filename = filename;
 542             nb_dlls++;
 543         }
 544     }
 545 }
 546
 547
 548 /***********************************************************************
 549  *           wine_dll_set_callback
 550  *
 551  * Set the callback function for dll loading, and call it
 552  * for all dlls that were implicitly loaded already.
 553  */
 554 void wine_dll_set_callback( load_dll_callback_t load )
 555 {
 556     int i;
 557     load_dll_callback = load;
 558     for (i = 0; i < nb_dlls; i++)
 559     {
 560         const IMAGE_NT_HEADERS *nt = builtin_dlls[i].nt;
 561         if (!nt) continue;
 562         builtin_dlls[i].nt = NULL;
 563         load_dll_callback( map_dll(nt), builtin_dlls[i].filename );
 564     }
 565     nb_dlls = 0;
 566     if (main_exe) load_dll_callback( map_dll(main_exe), "" );
 567 }
 568
 569
 570 /***********************************************************************
 571  *           wine_dll_load
 572  *
 573  * Load a builtin dll.
 574  */
 575 void *wine_dll_load( const char *filename, char *error, int errorsize, int *file_exists )
 576 {
 577     int i;
 578
 579     /* callback must have been set already */
 580     assert( load_dll_callback );
 581
 582     /* check if we have it in the list */
 583     /* this can happen when initializing pre-loaded dlls in wine_dll_set_callback */
 584     for (i = 0; i < nb_dlls; i++)
 585     {
 586         if (!builtin_dlls[i].nt) continue;
 587         if (!strcmp( builtin_dlls[i].filename, filename ))
 588         {
 589             const IMAGE_NT_HEADERS *nt = builtin_dlls[i].nt;
 590             builtin_dlls[i].nt = NULL;
 591             load_dll_callback( map_dll(nt), builtin_dlls[i].filename );
 592             *file_exists = 1;
 593             return (void *)1;
 594         }
 595     }
 596     return dlopen_dll( filename, error, errorsize, 0, file_exists );
 597 }
 598
 599
 600 /***********************************************************************
 601  *           wine_dll_unload
 602  *
 603  * Unload a builtin dll.
 604  */
 605 void wine_dll_unload( void *handle )
 606 {
 607     if (handle != (void *)1)
 608         wine_dlclose( handle, NULL, 0 );
 609 }
 610
 611
 612 /***********************************************************************
 613  *           wine_dll_load_main_exe
 614  *
 615  * Try to load the .so for the main exe.
 616  */
 617 void *wine_dll_load_main_exe( const char *name, char *error, int errorsize,
 618                               int test_only, int *file_exists )
 619 {
 620     return dlopen_dll( name, error, errorsize, test_only, file_exists );
 621 }
 622
 623
 624 /***********************************************************************
 625  *           wine_dll_enum_load_path
 626  *
 627  * Enumerate the dll load path.
 628  */
 629 const char *wine_dll_enum_load_path( unsigned int index )
 630 {
 631     if (index >= nb_dll_paths) return NULL;
 632     return dll_paths[index];
 633 }
 634
 635
 636 /***********************************************************************
 637  *           wine_dll_get_owner
 638  *
 639  * Retrieve the name of the 32-bit owner dll for a 16-bit dll.
 640  * Return 0 if OK, -1 on error.
 641  */
 642 int wine_dll_get_owner( const char *name, char *buffer, int size, int *exists )
 643 {
 644     int ret = -1;
 645     char *path;
 646     struct dll_path_context context;
 647
 648     *exists = 0;
 649
 650     for (path = first_dll_path( name, 1, &context ); path; path = next_dll_path( &context ))
 651     {
 652         int fd = open( path, O_RDONLY );
 653         if (fd != -1)
 654         {
 655             int res = read( fd, buffer, size - 1 );
 656             while (res > 0 && (buffer[res-1] == '\n' || buffer[res-1] == '\r')) res--;
 657             buffer[res] = 0;
 658             close( fd );
 659             *exists = 1;
 660             ret = 0;
 661             break;
 662         }
 663     }
 664     free_dll_path( &context );
 665     return ret;
 666 }
 667
 668
 669 /***********************************************************************
 670  *           set_max_limit
 671  *
 672  * Set a user limit to the maximum allowed value.
 673  */
 674 static void set_max_limit( int limit )
 675 {
 676 #ifdef HAVE_SETRLIMIT
 677     struct rlimit rlimit;
 678
 679     if (!getrlimit( limit, &rlimit ))
 680     {
 681         rlimit.rlim_cur = rlimit.rlim_max;
 682         if (setrlimit( limit, &rlimit ) != 0)
 683         {
 684 #if defined(__APPLE__) && defined(RLIMIT_NOFILE) && defined(OPEN_MAX)
 685             /* On Leopard, setrlimit(RLIMIT_NOFILE, ...) fails on attempts to set
 686              * rlim_cur above OPEN_MAX (even if rlim_max > OPEN_MAX). */
 687             if (limit == RLIMIT_NOFILE && rlimit.rlim_cur > OPEN_MAX)
 688             {
 689                 rlimit.rlim_cur = OPEN_MAX;
 690                 setrlimit( limit, &rlimit );
 691             }
 692 #endif
 693         }
 694     }
 695 #endif
 696 }
 697
 698
 699 #ifdef __APPLE__
 700 struct apple_stack_info
 701 {
 702     void *stack;
 703     size_t desired_size;
 704 };
 705
 706 /***********************************************************************
 707  *           apple_alloc_thread_stack
 708  *
 709  * Callback for wine_mmap_enum_reserved_areas to allocate space for
 710  * the secondary thread's stack.
 711  */
 712 static int apple_alloc_thread_stack( void *base, size_t size, void *arg )
 713 {
 714     struct apple_stack_info *info = arg;
 715
 716     /* For mysterious reasons, putting the thread stack at the very top
 717      * of the address space causes subsequent execs to fail, even on the
 718      * child side of a fork.  Avoid the top 16MB. */
 719     char * const limit = (char*)0xff000000;
 720     if ((char *)base >= limit) return 0;
 721     if (size > limit - (char*)base)
 722         size = limit - (char*)base;
 723     if (size < info->desired_size) return 0;
 724     info->stack = wine_anon_mmap( (char *)base + size - info->desired_size,
 725                                   info->desired_size, PROT_READ|PROT_WRITE, MAP_FIXED );
 726     return (info->stack != (void *)-1);
 727 }
 728
 729 /***********************************************************************
 730  *           apple_create_wine_thread
 731  *
 732  * Spin off a secondary thread to complete Wine initialization, leaving
 733  * the original thread for the Mac frameworks.
 734  *
 735  * Invoked as a CFRunLoopSource perform callback.
 736  */
 737 static void apple_create_wine_thread( void *init_func )
 738 {
 739     int success = 0;
 740     pthread_t thread;
 741     pthread_attr_t attr;
 742
 743     if (!pthread_attr_init( &attr ))
 744     {
 745         struct apple_stack_info info;
 746
 747         /* Try to put the new thread's stack in the reserved area.  If this
 748          * fails, just let it go wherever.  It'll be a waste of space, but we
 749          * can go on. */
 750         if (!pthread_attr_getstacksize( &attr, &info.desired_size ) &&
 751             wine_mmap_enum_reserved_areas( apple_alloc_thread_stack, &info, 1 ))
 752         {
 753             wine_mmap_remove_reserved_area( info.stack, info.desired_size, 0 );
 754             pthread_attr_setstackaddr( &attr, (char*)info.stack + info.desired_size );
 755         }
 756
 757         if (!pthread_attr_setdetachstate( &attr, PTHREAD_CREATE_JOINABLE ) &&
 758             !pthread_create( &thread, &attr, init_func, NULL ))
 759             success = 1;
 760
 761         pthread_attr_destroy( &attr );
 762     }
 763
 764     /* Failure is indicated by returning from wine_init().  Stopping
 765      * the run loop allows apple_main_thread() and thus wine_init() to
 766      * return. */
 767     if (!success)
 768         CFRunLoopStop( CFRunLoopGetCurrent() );
 769 }
 770
 771
 772 /***********************************************************************
 773  *           apple_main_thread
 774  *
 775  * Park the process's original thread in a Core Foundation run loop for
 776  * use by the Mac frameworks, especially receiving and handling
 777  * distributed notifications.  Spin off a new thread for the rest of the
 778  * Wine initialization.
 779  */
 780 static void apple_main_thread( void (*init_func)(void) )
 781 {
 782     CFRunLoopSourceContext source_context = { 0 };
 783     CFRunLoopSourceRef source;
 784
 785     if (!pthread_main_np())
 786     {
 787         init_func();
 788         return;
 789     }
 790
 791     /* Multi-processing Services can get confused about the main thread if the
 792      * first time it's used is on a secondary thread.  Use it here to make sure
 793      * that doesn't happen. */
 794     MPTaskIsPreemptive(MPCurrentTaskID());
 795
 796     /* Give ourselves the best chance of having the distributed notification
 797      * center scheduled on this thread's run loop.  In theory, it's scheduled
 798      * in the first thread to ask for it. */
 799     CFNotificationCenterGetDistributedCenter();
 800
 801     /* We use this run loop source for two purposes.  First, a run loop exits
 802      * if it has no more sources scheduled.  So, we need at least one source
 803      * to keep the run loop running.  Second, although it's not critical, it's
 804      * preferable for the Wine initialization to not proceed until we know
 805      * the run loop is running.  So, we signal our source immediately after
 806      * adding it and have its callback spin off the Wine thread. */
 807     source_context.info = init_func;
 808     source_context.perform = apple_create_wine_thread;
 809     source = CFRunLoopSourceCreate( NULL, 0, &source_context );
 810
 811     if (source)
 812     {
 813         CFRunLoopAddSource( CFRunLoopGetCurrent(), source, kCFRunLoopCommonModes );
 814         CFRunLoopSourceSignal( source );
 815         CFRelease( source );
 816
 817         CFRunLoopRun(); /* Should never return, except on error. */
 818     }
 819
 820     /* If we get here (i.e. return), that indicates failure to our caller. */
 821 }
 822 #endif
 823
 824
 825 #ifdef __ANDROID__
 826
 827 #ifndef WINE_JAVA_CLASS
 828 #define WINE_JAVA_CLASS "org/winehq/wine/WineActivity"
 829 #endif
 830
 831 static JavaVM *java_vm;
 832 static jobject java_object;
 833
 834 /* return the Java VM that was used for JNI initialisation */
 835 JavaVM *wine_get_java_vm(void)
 836 {
 837     return java_vm;
 838 }
 839
 840 /* return the Java object that called the wine_init method */
 841 jobject wine_get_java_object(void)
 842 {
 843     return java_object;
 844 }
 845
 846 /* main Wine initialisation */
 847 static jstring wine_init_jni( JNIEnv *env, jobject obj, jobjectArray cmdline, jobjectArray environment )
 848 {
 849     char **argv;
 850     char *str;
 851     char error[1024];
 852     int i, argc, length;
 853
 854     /* get the command line array */
 855
 856     argc = (*env)->GetArrayLength( env, cmdline );
 857     for (i = length = 0; i < argc; i++)
 858     {
 859         jobject str_obj = (*env)->GetObjectArrayElement( env, cmdline, i );
 860         length += (*env)->GetStringUTFLength( env, str_obj ) + 1;
 861     }
 862
 863     argv = malloc( (argc + 1) * sizeof(*argv) + length );
 864     str = (char *)(argv + argc + 1);
 865     for (i = 0; i < argc; i++)
 866     {
 867         jobject str_obj = (*env)->GetObjectArrayElement( env, cmdline, i );
 868         length = (*env)->GetStringUTFLength( env, str_obj );
 869         (*env)->GetStringUTFRegion( env, str_obj, 0,
 870                                     (*env)->GetStringLength( env, str_obj ), str );
 871         argv[i] = str;
 872         str[length] = 0;
 873         str += length + 1;
 874     }
 875     argv[argc] = NULL;
 876
 877     /* set the environment variables */
 878
 879     if (environment)
 880     {
 881         int count = (*env)->GetArrayLength( env, environment );
 882         for (i = 0; i < count - 1; i += 2)
 883         {
 884             jobject var_obj = (*env)->GetObjectArrayElement( env, environment, i );
 885             jobject val_obj = (*env)->GetObjectArrayElement( env, environment, i + 1 );
 886             const char *var = (*env)->GetStringUTFChars( env, var_obj, NULL );
 887
 888             if (val_obj)
 889             {
 890                 const char *val = (*env)->GetStringUTFChars( env, val_obj, NULL );
 891                 setenv( var, val, 1 );
 892                 if (!strcmp( var, "LD_LIBRARY_PATH" ))
 893                 {
 894                     void (*update_func)( const char * ) = dlsym( RTLD_DEFAULT,
 895                                                                  "android_update_LD_LIBRARY_PATH" );
 896                     if (update_func) update_func( val );
 897                 }
 898                 else if (!strcmp( var, "WINEDEBUGLOG" ))
 899                 {
 900                     int fd = open( val, O_WRONLY | O_CREAT | O_APPEND, 0666 );
 901                     if (fd != -1)
 902                     {
 903                         dup2( fd, 2 );
 904                         close( fd );
 905                     }
 906                 }
 907                 (*env)->ReleaseStringUTFChars( env, val_obj, val );
 908             }
 909             else unsetenv( var );
 910
 911             (*env)->ReleaseStringUTFChars( env, var_obj, var );
 912         }
 913     }
 914
 915     java_object = (*env)->NewGlobalRef( env, obj );
 916
 917 #ifdef __i386__
 918     {
 919         unsigned short java_fs = wine_get_fs();
 920         wine_set_fs( 0 );
 921         wine_init( argc, argv, error, sizeof(error) );
 922         wine_set_fs( java_fs );
 923     }
 924 #else
 925     wine_init( argc, argv, error, sizeof(error) );
 926 #endif
 927     return (*env)->NewStringUTF( env, error );
 928 }
 929
 930 jint JNI_OnLoad( JavaVM *vm, void *reserved )
 931 {
 932     static const JNINativeMethod method =
 933     {
 934         "wine_init", "([Ljava/lang/String;[Ljava/lang/String;)Ljava/lang/String;", wine_init_jni
 935     };
 936
 937     JNIEnv *env;
 938     jclass class;
 939
 940     java_vm = vm;
 941     if ((*vm)->AttachCurrentThread( vm, &env, NULL ) != JNI_OK) return JNI_ERR;
 942     if (!(class = (*env)->FindClass( env, WINE_JAVA_CLASS ))) return JNI_ERR;
 943     (*env)->RegisterNatives( env, class, &method, 1 );
 944     return JNI_VERSION_1_6;
 945 }
 946
 947 #endif  /* __ANDROID__ */
 948
 949 /***********************************************************************
 950  *           wine_init
 951  *
 952  * Main Wine initialisation.
 953  */
 954 void wine_init( int argc, char *argv[], char *error, int error_size )
 955 {
 956     struct dll_path_context context;
 957     char *path;
 958     void *ntdll = NULL;
 959     void (*init_func)(void);
 960
 961     /* force a few limits that are set too low on some platforms */
 962 #ifdef RLIMIT_NOFILE
 963     set_max_limit( RLIMIT_NOFILE );
 964 #endif
 965 #ifdef RLIMIT_AS
 966     set_max_limit( RLIMIT_AS );
 967 #endif
 968
 969     wine_init_argv0_path( argv[0] );
 970     build_dll_path();
 971     __wine_main_argc = argc;
 972     __wine_main_argv = argv;
 973     __wine_main_environ = __wine_get_main_environment();
 974     mmap_init();
 975
 976     for (path = first_dll_path( "ntdll.dll", 0, &context ); path; path = next_dll_path( &context ))
 977     {
 978         if ((ntdll = wine_dlopen( path, RTLD_NOW, error, error_size )))
 979         {
 980             /* if we didn't use the default dll dir, remove it from the search path */
 981             if (default_dlldir[0] && context.index < nb_dll_paths + 2) nb_dll_paths--;
 982             break;
 983         }
 984     }
 985     free_dll_path( &context );
 986
 987     if (!ntdll) return;
 988     if (!(init_func = wine_dlsym( ntdll, "__wine_process_init", error, error_size ))) return;
 989 #ifdef __APPLE__
 990     apple_main_thread( init_func );
 991 #else
 992     init_func();
 993 #endif
 994 }
 995
 996
 997 /*
 998  * These functions provide wrappers around dlopen() and associated
 999  * functions.  They work around a bug in glibc 2.1.x where calling
1000  * a dl*() function after a previous dl*() function has failed
1001  * without a dlerror() call between the two will cause a crash.
1002  * They all take a pointer to a buffer that
1003  * will receive the error description (from dlerror()).  This
1004  * parameter may be NULL if the error description is not required.
1005  */
1006
1007 #ifndef RTLD_FIRST
1008 #define RTLD_FIRST 0
1009 #endif
1010
1011 /***********************************************************************
1012  *              wine_dlopen
1013  */
1014 void *wine_dlopen( const char *filename, int flag, char *error, size_t errorsize )
1015 {
1016 #ifdef HAVE_DLOPEN
1017     void *ret;
1018     const char *s;
1019
1020 #ifdef __APPLE__
1021     /* the Mac OS loader pretends to be able to load PE files, so avoid them here */
1022     unsigned char magic[2];
1023     int fd = open( filename, O_RDONLY );
1024     if (fd != -1)
1025     {
1026         if (pread( fd, magic, 2, 0 ) == 2 && magic[0] == 'M' && magic[1] == 'Z')
1027         {
1028             if (error && errorsize)
1029             {
1030                 static const char msg[] = "MZ format";
1031                 size_t len = min( errorsize, sizeof(msg) );
1032                 memcpy( error, msg, len );
1033                 error[len - 1] = 0;
1034             }
1035             close( fd );
1036             return NULL;
1037         }
1038         close( fd );
1039     }
1040 #endif
1041     dlerror(); dlerror();
1042 #ifdef __sun
1043     if (strchr( filename, ':' ))
1044     {
1045         char path[PATH_MAX];
1046         /* Solaris' brain damaged dlopen() treats ':' as a path separator */
1047         realpath( filename, path );
1048         ret = dlopen( path, flag | RTLD_FIRST );
1049     }
1050     else
1051 #endif
1052     ret = dlopen( filename, flag | RTLD_FIRST );
1053     s = dlerror();
1054     if (error && errorsize)
1055     {
1056         if (s)
1057         {
1058             size_t len = strlen(s);
1059             if (len >= errorsize) len = errorsize - 1;
1060             memcpy( error, s, len );
1061             error[len] = 0;
1062         }
1063         else error[0] = 0;
1064     }
1065     dlerror();
1066     return ret;
1067 #else
1068     if (error)
1069     {
1070         static const char msg[] = "dlopen interface not detected by configure";
1071         size_t len = min( errorsize, sizeof(msg) );
1072         memcpy( error, msg, len );
1073         error[len - 1] = 0;
1074     }
1075     return NULL;
1076 #endif
1077 }
1078
1079 /***********************************************************************
1080  *              wine_dlsym
1081  */
1082 void *wine_dlsym( void *handle, const char *symbol, char *error, size_t errorsize )
1083 {
1084 #ifdef HAVE_DLOPEN
1085     void *ret;
1086     const char *s;
1087     dlerror(); dlerror();
1088     ret = dlsym( handle, symbol );
1089     s = dlerror();
1090     if (error && errorsize)
1091     {
1092         if (s)
1093         {
1094             size_t len = strlen(s);
1095             if (len >= errorsize) len = errorsize - 1;
1096             memcpy( error, s, len );
1097             error[len] = 0;
1098         }
1099         else error[0] = 0;
1100     }
1101     dlerror();
1102     return ret;
1103 #else
1104     if (error)
1105     {
1106         static const char msg[] = "dlopen interface not detected by configure";
1107         size_t len = min( errorsize, sizeof(msg) );
1108         memcpy( error, msg, len );
1109         error[len - 1] = 0;
1110     }
1111     return NULL;
1112 #endif
1113 }
1114
1115 /***********************************************************************
1116  *              wine_dlclose
1117  */
1118 int wine_dlclose( void *handle, char *error, size_t errorsize )
1119 {
1120 #ifdef HAVE_DLOPEN
1121     int ret;
1122     const char *s;
1123     dlerror(); dlerror();
1124     ret = dlclose( handle );
1125     s = dlerror();
1126     if (error && errorsize)
1127     {
1128         if (s)
1129         {
1130             size_t len = strlen(s);
1131             if (len >= errorsize) len = errorsize - 1;
1132             memcpy( error, s, len );
1133             error[len] = 0;
1134         }
1135         else error[0] = 0;
1136     }
1137     dlerror();
1138     return ret;
1139 #else
1140     if (error)
1141     {
1142         static const char msg[] = "dlopen interface not detected by configure";
1143         size_t len = min( errorsize, sizeof(msg) );
1144         memcpy( error, msg, len );
1145         error[len - 1] = 0;
1146     }
1147     return 1;
1148 #endif
1149 }