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