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 an array of name/ordinal RVAs by adding the specified delta */
 324 static inline void fixup_rva_names( UINT_PTR *ptr, int delta )
 325 {
 326     while (*ptr)
 327     {
 328         if (!(*ptr & IMAGE_ORDINAL_FLAG)) *ptr += delta;
 329         ptr++;
 330     }
 331 }
 332
 333
 334 /* fixup RVAs in the import directory */
 335 static void fixup_imports( IMAGE_IMPORT_DESCRIPTOR *dir, BYTE *base, int delta )
 336 {
 337     while (dir->Name)
 338     {
 339         fixup_rva_dwords( &dir->u.OriginalFirstThunk, delta, 1 );
 340         fixup_rva_dwords( &dir->Name, delta, 1 );
 341         fixup_rva_dwords( &dir->FirstThunk, delta, 1 );
 342         if (dir->u.OriginalFirstThunk) fixup_rva_names( (UINT_PTR *)(base + dir->u.OriginalFirstThunk), delta );
 343         if (dir->FirstThunk) fixup_rva_names( (UINT_PTR *)(base + dir->FirstThunk), delta );
 344         dir++;
 345     }
 346 }
 347
 348
 349 /* fixup RVAs in the export directory */
 350 static void fixup_exports( IMAGE_EXPORT_DIRECTORY *dir, BYTE *base, int delta )
 351 {
 352     fixup_rva_dwords( &dir->Name, delta, 1 );
 353     fixup_rva_dwords( &dir->AddressOfFunctions, delta, 1 );
 354     fixup_rva_dwords( &dir->AddressOfNames, delta, 1 );
 355     fixup_rva_dwords( &dir->AddressOfNameOrdinals, delta, 1 );
 356     fixup_rva_dwords( (DWORD *)(base + dir->AddressOfNames), delta, dir->NumberOfNames );
 357     fixup_rva_ptrs( (base + dir->AddressOfFunctions), base, dir->NumberOfFunctions );
 358 }
 359
 360
 361 /* fixup RVAs in the resource directory */
 362 static void fixup_resources( IMAGE_RESOURCE_DIRECTORY *dir, BYTE *root, int delta )
 363 {
 364     IMAGE_RESOURCE_DIRECTORY_ENTRY *entry;
 365     int i;
 366
 367     entry = (IMAGE_RESOURCE_DIRECTORY_ENTRY *)(dir + 1);
 368     for (i = 0; i < dir->NumberOfNamedEntries + dir->NumberOfIdEntries; i++, entry++)
 369     {
 370         void *ptr = root + entry->u2.s2.OffsetToDirectory;
 371         if (entry->u2.s2.DataIsDirectory) fixup_resources( ptr, root, delta );
 372         else
 373         {
 374             IMAGE_RESOURCE_DATA_ENTRY *data = ptr;
 375             fixup_rva_dwords( &data->OffsetToData, delta, 1 );
 376         }
 377     }
 378 }
 379
 380
 381 /* map a builtin dll in memory and fixup RVAs */
 382 static void *map_dll( const IMAGE_NT_HEADERS *nt_descr )
 383 {
 384 #ifdef HAVE_MMAP
 385     IMAGE_DATA_DIRECTORY *dir;
 386     IMAGE_DOS_HEADER *dos;
 387     IMAGE_NT_HEADERS *nt;
 388     IMAGE_SECTION_HEADER *sec;
 389     BYTE *addr;
 390     DWORD code_start, data_start, data_end;
 391     const size_t page_size = sysconf( _SC_PAGESIZE );
 392     const size_t page_mask = page_size - 1;
 393     int delta, nb_sections = 2;  /* code + data */
 394     unsigned int i;
 395
 396     size_t size = (sizeof(IMAGE_DOS_HEADER)
 397                    + sizeof(IMAGE_NT_HEADERS)
 398                    + nb_sections * sizeof(IMAGE_SECTION_HEADER));
 399
 400     assert( size <= page_size );
 401
 402     /* module address must be aligned on 64K boundary */
 403     addr = (BYTE *)((nt_descr->OptionalHeader.ImageBase + 0xffff) & ~0xffff);
 404     if (wine_anon_mmap( addr, page_size, PROT_READ|PROT_WRITE, MAP_FIXED ) != addr) return NULL;
 405
 406     dos    = (IMAGE_DOS_HEADER *)addr;
 407     nt     = (IMAGE_NT_HEADERS *)(dos + 1);
 408     sec    = (IMAGE_SECTION_HEADER *)(nt + 1);
 409
 410     /* Build the DOS and NT headers */
 411
 412     dos->e_magic    = IMAGE_DOS_SIGNATURE;
 413     dos->e_cblp     = 0x90;
 414     dos->e_cp       = 3;
 415     dos->e_cparhdr  = (sizeof(*dos)+0xf)/0x10;
 416     dos->e_minalloc = 0;
 417     dos->e_maxalloc = 0xffff;
 418     dos->e_ss       = 0x0000;
 419     dos->e_sp       = 0x00b8;
 420     dos->e_lfarlc   = sizeof(*dos);
 421     dos->e_lfanew   = sizeof(*dos);
 422
 423     *nt = *nt_descr;
 424
 425     delta      = (const BYTE *)nt_descr - addr;
 426     code_start = page_size;
 427     data_start = delta & ~page_mask;
 428     data_end   = (nt->OptionalHeader.SizeOfImage + delta + page_mask) & ~page_mask;
 429
 430     fixup_rva_ptrs( &nt->OptionalHeader.AddressOfEntryPoint, addr, 1 );
 431
 432     nt->FileHeader.NumberOfSections                = nb_sections;
 433     nt->OptionalHeader.BaseOfCode                  = code_start;
 434 #ifndef _WIN64
 435     nt->OptionalHeader.BaseOfData                  = data_start;
 436 #endif
 437     nt->OptionalHeader.SizeOfCode                  = data_start - code_start;
 438     nt->OptionalHeader.SizeOfInitializedData       = data_end - data_start;
 439     nt->OptionalHeader.SizeOfUninitializedData     = 0;
 440     nt->OptionalHeader.SizeOfImage                 = data_end;
 441     nt->OptionalHeader.ImageBase                   = (ULONG_PTR)addr;
 442
 443     /* Build the code section */
 444
 445     memcpy( sec->Name, ".text", sizeof(".text") );
 446     sec->SizeOfRawData = data_start - code_start;
 447     sec->Misc.VirtualSize = sec->SizeOfRawData;
 448     sec->VirtualAddress   = code_start;
 449     sec->PointerToRawData = code_start;
 450     sec->Characteristics  = (IMAGE_SCN_CNT_CODE | IMAGE_SCN_MEM_EXECUTE | IMAGE_SCN_MEM_READ);
 451     sec++;
 452
 453     /* Build the data section */
 454
 455     memcpy( sec->Name, ".data", sizeof(".data") );
 456     sec->SizeOfRawData = data_end - data_start;
 457     sec->Misc.VirtualSize = sec->SizeOfRawData;
 458     sec->VirtualAddress   = data_start;
 459     sec->PointerToRawData = data_start;
 460     sec->Characteristics  = (IMAGE_SCN_CNT_INITIALIZED_DATA |
 461                              IMAGE_SCN_MEM_WRITE | IMAGE_SCN_MEM_READ);
 462     sec++;
 463
 464     for (i = 0; i < nt->OptionalHeader.NumberOfRvaAndSizes; i++)
 465         fixup_rva_dwords( &nt->OptionalHeader.DataDirectory[i].VirtualAddress, delta, 1 );
 466
 467     /* Build the import directory */
 468
 469     dir = &nt->OptionalHeader.DataDirectory[IMAGE_FILE_IMPORT_DIRECTORY];
 470     if (dir->Size)
 471     {
 472         IMAGE_IMPORT_DESCRIPTOR *imports = (void *)(addr + dir->VirtualAddress);
 473         fixup_imports( imports, addr, delta );
 474     }
 475
 476     /* Build the resource directory */
 477
 478     dir = &nt->OptionalHeader.DataDirectory[IMAGE_FILE_RESOURCE_DIRECTORY];
 479     if (dir->Size)
 480     {
 481         void *ptr = (void *)(addr + dir->VirtualAddress);
 482         fixup_resources( ptr, ptr, delta );
 483     }
 484
 485     /* Build the export directory */
 486
 487     dir = &nt->OptionalHeader.DataDirectory[IMAGE_FILE_EXPORT_DIRECTORY];
 488     if (dir->Size)
 489     {
 490         IMAGE_EXPORT_DIRECTORY *exports = (void *)(addr + dir->VirtualAddress);
 491         fixup_exports( exports, addr, delta );
 492     }
 493     return addr;
 494 #else  /* HAVE_MMAP */
 495     return NULL;
 496 #endif  /* HAVE_MMAP */
 497 }
 498
 499
 500 /***********************************************************************
 501  *           __wine_get_main_environment
 502  *
 503  * Return an environment pointer to work around lack of environ variable.
 504  * Only exported on Mac OS.
 505  */
 506 char **__wine_get_main_environment(void)
 507 {
 508     return environ;
 509 }
 510
 511
 512 /***********************************************************************
 513  *           __wine_dll_register
 514  *
 515  * Register a built-in DLL descriptor.
 516  */
 517 void __wine_dll_register( const IMAGE_NT_HEADERS *header, const char *filename )
 518 {
 519     if (load_dll_callback) load_dll_callback( map_dll(header), filename );
 520     else
 521     {
 522         if (!(header->FileHeader.Characteristics & IMAGE_FILE_DLL))
 523             main_exe = header;
 524         else
 525         {
 526             assert( nb_dlls < MAX_DLLS );
 527             builtin_dlls[nb_dlls].nt = header;
 528             builtin_dlls[nb_dlls].filename = filename;
 529             nb_dlls++;
 530         }
 531     }
 532 }
 533
 534
 535 /***********************************************************************
 536  *           wine_dll_set_callback
 537  *
 538  * Set the callback function for dll loading, and call it
 539  * for all dlls that were implicitly loaded already.
 540  */
 541 void wine_dll_set_callback( load_dll_callback_t load )
 542 {
 543     int i;
 544     load_dll_callback = load;
 545     for (i = 0; i < nb_dlls; i++)
 546     {
 547         const IMAGE_NT_HEADERS *nt = builtin_dlls[i].nt;
 548         if (!nt) continue;
 549         builtin_dlls[i].nt = NULL;
 550         load_dll_callback( map_dll(nt), builtin_dlls[i].filename );
 551     }
 552     nb_dlls = 0;
 553     if (main_exe) load_dll_callback( map_dll(main_exe), "" );
 554 }
 555
 556
 557 /***********************************************************************
 558  *           wine_dll_load
 559  *
 560  * Load a builtin dll.
 561  */
 562 void *wine_dll_load( const char *filename, char *error, int errorsize, int *file_exists )
 563 {
 564     int i;
 565
 566     /* callback must have been set already */
 567     assert( load_dll_callback );
 568
 569     /* check if we have it in the list */
 570     /* this can happen when initializing pre-loaded dlls in wine_dll_set_callback */
 571     for (i = 0; i < nb_dlls; i++)
 572     {
 573         if (!builtin_dlls[i].nt) continue;
 574         if (!strcmp( builtin_dlls[i].filename, filename ))
 575         {
 576             const IMAGE_NT_HEADERS *nt = builtin_dlls[i].nt;
 577             builtin_dlls[i].nt = NULL;
 578             load_dll_callback( map_dll(nt), builtin_dlls[i].filename );
 579             *file_exists = 1;
 580             return (void *)1;
 581         }
 582     }
 583     return dlopen_dll( filename, error, errorsize, 0, file_exists );
 584 }
 585
 586
 587 /***********************************************************************
 588  *           wine_dll_unload
 589  *
 590  * Unload a builtin dll.
 591  */
 592 void wine_dll_unload( void *handle )
 593 {
 594     if (handle != (void *)1)
 595         wine_dlclose( handle, NULL, 0 );
 596 }
 597
 598
 599 /***********************************************************************
 600  *           wine_dll_load_main_exe
 601  *
 602  * Try to load the .so for the main exe.
 603  */
 604 void *wine_dll_load_main_exe( const char *name, char *error, int errorsize,
 605                               int test_only, int *file_exists )
 606 {
 607     return dlopen_dll( name, error, errorsize, test_only, file_exists );
 608 }
 609
 610
 611 /***********************************************************************
 612  *           wine_dll_enum_load_path
 613  *
 614  * Enumerate the dll load path.
 615  */
 616 const char *wine_dll_enum_load_path( unsigned int index )
 617 {
 618     if (index >= nb_dll_paths) return NULL;
 619     return dll_paths[index];
 620 }
 621
 622
 623 /***********************************************************************
 624  *           wine_dll_get_owner
 625  *
 626  * Retrieve the name of the 32-bit owner dll for a 16-bit dll.
 627  * Return 0 if OK, -1 on error.
 628  */
 629 int wine_dll_get_owner( const char *name, char *buffer, int size, int *exists )
 630 {
 631     int ret = -1;
 632     char *path;
 633     struct dll_path_context context;
 634
 635     *exists = 0;
 636
 637     for (path = first_dll_path( name, 1, &context ); path; path = next_dll_path( &context ))
 638     {
 639         int fd = open( path, O_RDONLY );
 640         if (fd != -1)
 641         {
 642             int res = read( fd, buffer, size - 1 );
 643             while (res > 0 && (buffer[res-1] == '\n' || buffer[res-1] == '\r')) res--;
 644             buffer[res] = 0;
 645             close( fd );
 646             *exists = 1;
 647             ret = 0;
 648             break;
 649         }
 650     }
 651     free_dll_path( &context );
 652     return ret;
 653 }
 654
 655
 656 /***********************************************************************
 657  *           set_max_limit
 658  *
 659  * Set a user limit to the maximum allowed value.
 660  */
 661 static void set_max_limit( int limit )
 662 {
 663 #ifdef HAVE_SETRLIMIT
 664     struct rlimit rlimit;
 665
 666     if (!getrlimit( limit, &rlimit ))
 667     {
 668         rlimit.rlim_cur = rlimit.rlim_max;
 669         if (setrlimit( limit, &rlimit ) != 0)
 670         {
 671 #if defined(__APPLE__) && defined(RLIMIT_NOFILE) && defined(OPEN_MAX)
 672             /* On Leopard, setrlimit(RLIMIT_NOFILE, ...) fails on attempts to set
 673              * rlim_cur above OPEN_MAX (even if rlim_max > OPEN_MAX). */
 674             if (limit == RLIMIT_NOFILE && rlimit.rlim_cur > OPEN_MAX)
 675             {
 676                 rlimit.rlim_cur = OPEN_MAX;
 677                 setrlimit( limit, &rlimit );
 678             }
 679 #endif
 680         }
 681     }
 682 #endif
 683 }
 684
 685
 686 #ifdef __APPLE__
 687 struct apple_stack_info
 688 {
 689     void *stack;
 690     size_t desired_size;
 691 };
 692
 693 /***********************************************************************
 694  *           apple_alloc_thread_stack
 695  *
 696  * Callback for wine_mmap_enum_reserved_areas to allocate space for
 697  * the secondary thread's stack.
 698  */
 699 static int apple_alloc_thread_stack( void *base, size_t size, void *arg )
 700 {
 701     struct apple_stack_info *info = arg;
 702
 703     /* For mysterious reasons, putting the thread stack at the very top
 704      * of the address space causes subsequent execs to fail, even on the
 705      * child side of a fork.  Avoid the top 16MB. */
 706     char * const limit = (char*)0xff000000;
 707     if ((char *)base >= limit) return 0;
 708     if (size > limit - (char*)base)
 709         size = limit - (char*)base;
 710     if (size < info->desired_size) return 0;
 711     info->stack = wine_anon_mmap( (char *)base + size - info->desired_size,
 712                                   info->desired_size, PROT_READ|PROT_WRITE, MAP_FIXED );
 713     return (info->stack != (void *)-1);
 714 }
 715
 716 /***********************************************************************
 717  *           apple_create_wine_thread
 718  *
 719  * Spin off a secondary thread to complete Wine initialization, leaving
 720  * the original thread for the Mac frameworks.
 721  *
 722  * Invoked as a CFRunLoopSource perform callback.
 723  */
 724 static void apple_create_wine_thread( void *init_func )
 725 {
 726     int success = 0;
 727     pthread_t thread;
 728     pthread_attr_t attr;
 729
 730     if (!pthread_attr_init( &attr ))
 731     {
 732         struct apple_stack_info info;
 733
 734         /* Try to put the new thread's stack in the reserved area.  If this
 735          * fails, just let it go wherever.  It'll be a waste of space, but we
 736          * can go on. */
 737         if (!pthread_attr_getstacksize( &attr, &info.desired_size ) &&
 738             wine_mmap_enum_reserved_areas( apple_alloc_thread_stack, &info, 1 ))
 739         {
 740             wine_mmap_remove_reserved_area( info.stack, info.desired_size, 0 );
 741             pthread_attr_setstackaddr( &attr, (char*)info.stack + info.desired_size );
 742         }
 743
 744         if (!pthread_attr_setdetachstate( &attr, PTHREAD_CREATE_JOINABLE ) &&
 745             !pthread_create( &thread, &attr, init_func, NULL ))
 746             success = 1;
 747
 748         pthread_attr_destroy( &attr );
 749     }
 750
 751     /* Failure is indicated by returning from wine_init().  Stopping
 752      * the run loop allows apple_main_thread() and thus wine_init() to
 753      * return. */
 754     if (!success)
 755         CFRunLoopStop( CFRunLoopGetCurrent() );
 756 }
 757
 758
 759 /***********************************************************************
 760  *           apple_main_thread
 761  *
 762  * Park the process's original thread in a Core Foundation run loop for
 763  * use by the Mac frameworks, especially receiving and handling
 764  * distributed notifications.  Spin off a new thread for the rest of the
 765  * Wine initialization.
 766  */
 767 static void apple_main_thread( void (*init_func)(void) )
 768 {
 769     CFRunLoopSourceContext source_context = { 0 };
 770     CFRunLoopSourceRef source;
 771
 772     if (!pthread_main_np())
 773     {
 774         init_func();
 775         return;
 776     }
 777
 778     /* Multi-processing Services can get confused about the main thread if the
 779      * first time it's used is on a secondary thread.  Use it here to make sure
 780      * that doesn't happen. */
 781     MPTaskIsPreemptive(MPCurrentTaskID());
 782
 783     /* Give ourselves the best chance of having the distributed notification
 784      * center scheduled on this thread's run loop.  In theory, it's scheduled
 785      * in the first thread to ask for it. */
 786     CFNotificationCenterGetDistributedCenter();
 787
 788     /* We use this run loop source for two purposes.  First, a run loop exits
 789      * if it has no more sources scheduled.  So, we need at least one source
 790      * to keep the run loop running.  Second, although it's not critical, it's
 791      * preferable for the Wine initialization to not proceed until we know
 792      * the run loop is running.  So, we signal our source immediately after
 793      * adding it and have its callback spin off the Wine thread. */
 794     source_context.info = init_func;
 795     source_context.perform = apple_create_wine_thread;
 796     source = CFRunLoopSourceCreate( NULL, 0, &source_context );
 797
 798     if (source)
 799     {
 800         CFRunLoopAddSource( CFRunLoopGetCurrent(), source, kCFRunLoopCommonModes );
 801         CFRunLoopSourceSignal( source );
 802         CFRelease( source );
 803
 804         CFRunLoopRun(); /* Should never return, except on error. */
 805     }
 806
 807     /* If we get here (i.e. return), that indicates failure to our caller. */
 808 }
 809 #endif
 810
 811
 812 #ifdef __ANDROID__
 813
 814 #ifndef WINE_JAVA_CLASS
 815 #define WINE_JAVA_CLASS "org/winehq/wine/WineActivity"
 816 #endif
 817
 818 static JavaVM *java_vm;
 819 static jobject java_object;
 820
 821 /* return the Java VM that was used for JNI initialisation */
 822 JavaVM *wine_get_java_vm(void)
 823 {
 824     return java_vm;
 825 }
 826
 827 /* return the Java object that called the wine_init method */
 828 jobject wine_get_java_object(void)
 829 {
 830     return java_object;
 831 }
 832
 833 /* main Wine initialisation */
 834 static jstring wine_init_jni( JNIEnv *env, jobject obj, jobjectArray cmdline, jobjectArray environment )
 835 {
 836     char **argv;
 837     char *str;
 838     char error[1024];
 839     int i, argc, length;
 840
 841     /* get the command line array */
 842
 843     argc = (*env)->GetArrayLength( env, cmdline );
 844     for (i = length = 0; i < argc; i++)
 845     {
 846         jobject str_obj = (*env)->GetObjectArrayElement( env, cmdline, i );
 847         length += (*env)->GetStringUTFLength( env, str_obj ) + 1;
 848     }
 849
 850     argv = malloc( (argc + 1) * sizeof(*argv) + length );
 851     str = (char *)(argv + argc + 1);
 852     for (i = 0; i < argc; i++)
 853     {
 854         jobject str_obj = (*env)->GetObjectArrayElement( env, cmdline, i );
 855         length = (*env)->GetStringUTFLength( env, str_obj );
 856         (*env)->GetStringUTFRegion( env, str_obj, 0,
 857                                     (*env)->GetStringLength( env, str_obj ), str );
 858         argv[i] = str;
 859         str[length] = 0;
 860         str += length + 1;
 861     }
 862     argv[argc] = NULL;
 863
 864     /* set the environment variables */
 865
 866     if (environment)
 867     {
 868         int count = (*env)->GetArrayLength( env, environment );
 869         for (i = 0; i < count - 1; i += 2)
 870         {
 871             jobject var_obj = (*env)->GetObjectArrayElement( env, environment, i );
 872             jobject val_obj = (*env)->GetObjectArrayElement( env, environment, i + 1 );
 873             const char *var = (*env)->GetStringUTFChars( env, var_obj, NULL );
 874
 875             if (val_obj)
 876             {
 877                 const char *val = (*env)->GetStringUTFChars( env, val_obj, NULL );
 878                 setenv( var, val, 1 );
 879                 if (!strcmp( var, "LD_LIBRARY_PATH" ))
 880                 {
 881                     void (*update_func)( const char * ) = dlsym( RTLD_DEFAULT,
 882                                                                  "android_update_LD_LIBRARY_PATH" );
 883                     if (update_func) update_func( val );
 884                 }
 885                 else if (!strcmp( var, "WINEDEBUGLOG" ))
 886                 {
 887                     int fd = open( val, O_WRONLY | O_CREAT | O_APPEND, 0666 );
 888                     if (fd != -1)
 889                     {
 890                         dup2( fd, 2 );
 891                         close( fd );
 892                     }
 893                 }
 894                 (*env)->ReleaseStringUTFChars( env, val_obj, val );
 895             }
 896             else unsetenv( var );
 897
 898             (*env)->ReleaseStringUTFChars( env, var_obj, var );
 899         }
 900     }
 901
 902     java_object = (*env)->NewGlobalRef( env, obj );
 903
 904 #ifdef __i386__
 905     {
 906         unsigned short java_fs = wine_get_fs();
 907         wine_set_fs( 0 );
 908         wine_init( argc, argv, error, sizeof(error) );
 909         wine_set_fs( java_fs );
 910     }
 911 #else
 912     wine_init( argc, argv, error, sizeof(error) );
 913 #endif
 914     return (*env)->NewStringUTF( env, error );
 915 }
 916
 917 jint JNI_OnLoad( JavaVM *vm, void *reserved )
 918 {
 919     static const JNINativeMethod method =
 920     {
 921         "wine_init", "([Ljava/lang/String;[Ljava/lang/String;)Ljava/lang/String;", wine_init_jni
 922     };
 923
 924     JNIEnv *env;
 925     jclass class;
 926
 927     java_vm = vm;
 928     if ((*vm)->AttachCurrentThread( vm, &env, NULL ) != JNI_OK) return JNI_ERR;
 929     if (!(class = (*env)->FindClass( env, WINE_JAVA_CLASS ))) return JNI_ERR;
 930     (*env)->RegisterNatives( env, class, &method, 1 );
 931     return JNI_VERSION_1_6;
 932 }
 933
 934 #endif  /* __ANDROID__ */
 935
 936 /***********************************************************************
 937  *           wine_init
 938  *
 939  * Main Wine initialisation.
 940  */
 941 void wine_init( int argc, char *argv[], char *error, int error_size )
 942 {
 943     struct dll_path_context context;
 944     char *path;
 945     void *ntdll = NULL;
 946     void (*init_func)(void);
 947
 948     /* force a few limits that are set too low on some platforms */
 949 #ifdef RLIMIT_NOFILE
 950     set_max_limit( RLIMIT_NOFILE );
 951 #endif
 952 #ifdef RLIMIT_AS
 953     set_max_limit( RLIMIT_AS );
 954 #endif
 955
 956     wine_init_argv0_path( argv[0] );
 957     build_dll_path();
 958     __wine_main_argc = argc;
 959     __wine_main_argv = argv;
 960     __wine_main_environ = __wine_get_main_environment();
 961     mmap_init();
 962
 963     for (path = first_dll_path( "ntdll.dll", 0, &context ); path; path = next_dll_path( &context ))
 964     {
 965         if ((ntdll = wine_dlopen( path, RTLD_NOW, error, error_size )))
 966         {
 967             /* if we didn't use the default dll dir, remove it from the search path */
 968             if (default_dlldir[0] && context.index < nb_dll_paths + 2) nb_dll_paths--;
 969             break;
 970         }
 971     }
 972     free_dll_path( &context );
 973
 974     if (!ntdll) return;
 975     if (!(init_func = wine_dlsym( ntdll, "__wine_process_init", error, error_size ))) return;
 976 #ifdef __APPLE__
 977     apple_main_thread( init_func );
 978 #else
 979     init_func();
 980 #endif
 981 }
 982
 983
 984 /*
 985  * These functions provide wrappers around dlopen() and associated
 986  * functions.  They work around a bug in glibc 2.1.x where calling
 987  * a dl*() function after a previous dl*() function has failed
 988  * without a dlerror() call between the two will cause a crash.
 989  * They all take a pointer to a buffer that
 990  * will receive the error description (from dlerror()).  This
 991  * parameter may be NULL if the error description is not required.
 992  */
 993
 994 #ifndef RTLD_FIRST
 995 #define RTLD_FIRST 0
 996 #endif
 997
 998 /***********************************************************************
 999  *              wine_dlopen
1000  */
1001 void *wine_dlopen( const char *filename, int flag, char *error, size_t errorsize )
1002 {
1003 #ifdef HAVE_DLOPEN
1004     void *ret;
1005     const char *s;
1006
1007 #ifdef __APPLE__
1008     /* the Mac OS loader pretends to be able to load PE files, so avoid them here */
1009     unsigned char magic[2];
1010     int fd = open( filename, O_RDONLY );
1011     if (fd != -1)
1012     {
1013         if (pread( fd, magic, 2, 0 ) == 2 && magic[0] == 'M' && magic[1] == 'Z')
1014         {
1015             if (error && errorsize)
1016             {
1017                 static const char msg[] = "MZ format";
1018                 size_t len = min( errorsize, sizeof(msg) );
1019                 memcpy( error, msg, len );
1020                 error[len - 1] = 0;
1021             }
1022             close( fd );
1023             return NULL;
1024         }
1025         close( fd );
1026     }
1027 #endif
1028     dlerror(); dlerror();
1029 #ifdef __sun
1030     if (strchr( filename, ':' ))
1031     {
1032         char path[PATH_MAX];
1033         /* Solaris' brain damaged dlopen() treats ':' as a path separator */
1034         realpath( filename, path );
1035         ret = dlopen( path, flag | RTLD_FIRST );
1036     }
1037     else
1038 #endif
1039     ret = dlopen( filename, flag | RTLD_FIRST );
1040     s = dlerror();
1041     if (error && errorsize)
1042     {
1043         if (s)
1044         {
1045             size_t len = strlen(s);
1046             if (len >= errorsize) len = errorsize - 1;
1047             memcpy( error, s, len );
1048             error[len] = 0;
1049         }
1050         else error[0] = 0;
1051     }
1052     dlerror();
1053     return ret;
1054 #else
1055     if (error)
1056     {
1057         static const char msg[] = "dlopen interface not detected by configure";
1058         size_t len = min( errorsize, sizeof(msg) );
1059         memcpy( error, msg, len );
1060         error[len - 1] = 0;
1061     }
1062     return NULL;
1063 #endif
1064 }
1065
1066 /***********************************************************************
1067  *              wine_dlsym
1068  */
1069 void *wine_dlsym( void *handle, const char *symbol, char *error, size_t errorsize )
1070 {
1071 #ifdef HAVE_DLOPEN
1072     void *ret;
1073     const char *s;
1074     dlerror(); dlerror();
1075     ret = dlsym( handle, symbol );
1076     s = dlerror();
1077     if (error && errorsize)
1078     {
1079         if (s)
1080         {
1081             size_t len = strlen(s);
1082             if (len >= errorsize) len = errorsize - 1;
1083             memcpy( error, s, len );
1084             error[len] = 0;
1085         }
1086         else error[0] = 0;
1087     }
1088     dlerror();
1089     return ret;
1090 #else
1091     if (error)
1092     {
1093         static const char msg[] = "dlopen interface not detected by configure";
1094         size_t len = min( errorsize, sizeof(msg) );
1095         memcpy( error, msg, len );
1096         error[len - 1] = 0;
1097     }
1098     return NULL;
1099 #endif
1100 }
1101
1102 /***********************************************************************
1103  *              wine_dlclose
1104  */
1105 int wine_dlclose( void *handle, char *error, size_t errorsize )
1106 {
1107 #ifdef HAVE_DLOPEN
1108     int ret;
1109     const char *s;
1110     dlerror(); dlerror();
1111     ret = dlclose( handle );
1112     s = dlerror();
1113     if (error && errorsize)
1114     {
1115         if (s)
1116         {
1117             size_t len = strlen(s);
1118             if (len >= errorsize) len = errorsize - 1;
1119             memcpy( error, s, len );
1120             error[len] = 0;
1121         }
1122         else error[0] = 0;
1123     }
1124     dlerror();
1125     return ret;
1126 #else
1127     if (error)
1128     {
1129         static const char msg[] = "dlopen interface not detected by configure";
1130         size_t len = min( errorsize, sizeof(msg) );
1131         memcpy( error, msg, len );
1132         error[len - 1] = 0;
1133     }
1134     return 1;
1135 #endif
1136 }