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