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