git.sesse.net Git - vlc/blob - loader/pe_image.c

   1 /*
   2  *  Copyright   1994    Eric Youndale & Erik Bos
   3  *  Copyright   1995    Martin von Löwis
   4  *  Copyright   1996-98 Marcus Meissner
   5  *
   6  *      based on Eric Youndale's pe-test and:
   7  *
   8  *      ftp.microsoft.com:/pub/developer/MSDN/CD8/PEFILE.ZIP
   9  * make that:
  10  *      ftp.microsoft.com:/developr/MSDN/OctCD/PEFILE.ZIP
  11  *
  12  * Modified for use with MPlayer, detailed CVS changelog at
  13  * http://www.mplayerhq.hu/cgi-bin/cvsweb.cgi/main/
  14  * $Id$
  15  *
  16  */
  17 /* Notes:
  18  * Before you start changing something in this file be aware of the following:
  19  *
  20  * - There are several functions called recursively. In a very subtle and
  21  *   obscure way. DLLs can reference each other recursively etc.
  22  * - If you want to enhance, speed up or clean up something in here, think
  23  *   twice WHY it is implemented in that strange way. There is usually a reason.
  24  *   Though sometimes it might just be lazyness ;)
  25  * - In PE_MapImage, right before fixup_imports() all external and internal
  26  *   state MUST be correct since this function can be called with the SAME image
  27  *   AGAIN. (Thats recursion for you.) That means MODREF.module and
  28  *   NE_MODULE.module32.
  29  * - Sometimes, we can't use Linux mmap() to mmap() the images directly.
  30  *
  31  *   The problem is, that there is not direct 1:1 mapping from a diskimage and
  32  *   a memoryimage. The headers at the start are mapped linear, but the sections
  33  *   are not. Older x86 pe binaries are 512 byte aligned in file and 4096 byte
  34  *   aligned in memory. Linux likes them 4096 byte aligned in memory (due to
  35  *   x86 pagesize, this cannot be fixed without a rather large kernel rewrite)
  36  *   and 'blocksize' file-aligned (offsets). Since we have 512/1024/2048 (CDROM)
  37  *   and other byte blocksizes, we can't always do this.  We *can* do this for
  38  *   newer pe binaries produced by MSVC 5 and later, since they are also aligned
  39  *   to 4096 byte boundaries on disk.
  40  */
  41 #include "config.h"
  42
  43 #include <errno.h>
  44 #include <assert.h>
  45 #include <stdio.h>
  46 #include <stdlib.h>
  47 #include <string.h>
  48 #include <unistd.h>
  49 #include <sys/types.h>
  50 #include <sys/stat.h>
  51 #include <fcntl.h>
  52 #ifdef HAVE_SYS_MMAN_H
  53 #include <sys/mman.h>
  54 #endif
  55 #include "wine/windef.h"
  56 #include "wine/winbase.h"
  57 #include "wine/winerror.h"
  58 #include "wine/heap.h"
  59 #include "wine/pe_image.h"
  60 #include "wine/module.h"
  61 #include "wine/debugtools.h"
  62 #include "ext.h"
  63 #include "win32.h"
  64
  65 #define RVA(x) ((void *)((char *)load_addr+(unsigned int)(x)))
  66
  67 #define AdjustPtr(ptr,delta) ((char *)(ptr) + (delta))
  68
  69 extern void* LookupExternal(const char* library, int ordinal);
  70 extern void* LookupExternalByName(const char* library, const char* name);
  71
  72 static void dump_exports( HMODULE hModule )
  73 {
  74   char          *Module;
  75   unsigned int i, j;
  76   u_short       *ordinal;
  77   u_long        *function,*functions;
  78   u_char        **name;
  79   unsigned int load_addr = hModule;
  80
  81   DWORD rva_start = PE_HEADER(hModule)->OptionalHeader
  82                    .DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress;
  83   DWORD rva_end = rva_start + PE_HEADER(hModule)->OptionalHeader
  84                    .DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].Size;
  85   IMAGE_EXPORT_DIRECTORY *pe_exports = (IMAGE_EXPORT_DIRECTORY*)RVA(rva_start);
  86
  87   Module = (char*)RVA(pe_exports->Name);
  88   TRACE("*******EXPORT DATA*******\n");
  89   TRACE("Module name is %s, %ld functions, %ld names\n",
  90         Module, pe_exports->NumberOfFunctions, pe_exports->NumberOfNames);
  91
  92   ordinal=(u_short*) RVA(pe_exports->AddressOfNameOrdinals);
  93   functions=function=(u_long*) RVA(pe_exports->AddressOfFunctions);
  94   name=(u_char**) RVA(pe_exports->AddressOfNames);
  95
  96   TRACE(" Ord    RVA     Addr   Name\n" );
  97   for (i=0;i<pe_exports->NumberOfFunctions;i++, function++)
  98   {
  99       if (!*function) continue;
 100       if (TRACE_ON(win32))
 101       {
 102         DPRINTF( "%4ld %08lx %p", i + pe_exports->Base, *function, RVA(*function) );
 103
 104         for (j = 0; j < pe_exports->NumberOfNames; j++)
 105           if (ordinal[j] == i)
 106           {
 107               DPRINTF( "  %s", (char*)RVA(name[j]) );
 108               break;
 109           }
 110         if ((*function >= rva_start) && (*function <= rva_end))
 111           DPRINTF(" (forwarded -> %s)", (char *)RVA(*function));
 112         DPRINTF("\n");
 113       }
 114   }
 115 }
 116
 117 /* Look up the specified function or ordinal in the exportlist:
 118  * If it is a string:
 119  *      - look up the name in the Name list.
 120  *      - look up the ordinal with that index.
 121  *      - use the ordinal as offset into the functionlist
 122  * If it is a ordinal:
 123  *      - use ordinal-pe_export->Base as offset into the functionlist
 124  */
 125 FARPROC PE_FindExportedFunction(
 126         WINE_MODREF *wm,
 127         LPCSTR funcName,
 128         WIN_BOOL snoop )
 129 {
 130         u_short                         * ordinals;
 131         u_long                          * function;
 132         u_char                          ** name;
 133         const char *ename = NULL;
 134         int                             i, ordinal;
 135         PE_MODREF                       *pem = &(wm->binfmt.pe);
 136         IMAGE_EXPORT_DIRECTORY          *exports = pem->pe_export;
 137         unsigned int                    load_addr = wm->module;
 138         u_long                          rva_start, rva_end, addr;
 139         char                            * forward;
 140
 141         if (HIWORD(funcName))
 142                 TRACE("(%s)\n",funcName);
 143         else
 144                 TRACE("(%d)\n",(int)funcName);
 145         if (!exports) {
 146                 /* Not a fatal problem, some apps do
 147                  * GetProcAddress(0,"RegisterPenApp") which triggers this
 148                  * case.
 149                  */
 150                 WARN("Module %08x(%s)/MODREF %p doesn't have a exports table.\n",wm->module,wm->modname,pem);
 151                 return NULL;
 152         }
 153         ordinals= (u_short*)  RVA(exports->AddressOfNameOrdinals);
 154         function= (u_long*)   RVA(exports->AddressOfFunctions);
 155         name    = (u_char **) RVA(exports->AddressOfNames);
 156         forward = NULL;
 157         rva_start = PE_HEADER(wm->module)->OptionalHeader
 158                 .DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress;
 159         rva_end = rva_start + PE_HEADER(wm->module)->OptionalHeader
 160                 .DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].Size;
 161
 162         if (HIWORD(funcName))
 163         {
 164
 165             int min = 0, max = exports->NumberOfNames - 1;
 166             while (min <= max)
 167             {
 168                 int res, pos = (min + max) / 2;
 169                 ename = (const char*) RVA(name[pos]);
 170                 if (!(res = strcmp( ename, funcName )))
 171                 {
 172                     ordinal = ordinals[pos];
 173                     goto found;
 174                 }
 175                 if (res > 0) max = pos - 1;
 176                 else min = pos + 1;
 177             }
 178
 179             for (i = 0; i < exports->NumberOfNames; i++)
 180             {
 181                 ename = (const char*) RVA(name[i]);
 182                 if (!strcmp( ename, funcName ))
 183                 {
 184                     ERR( "%s.%s required a linear search\n", wm->modname, funcName );
 185                     ordinal = ordinals[i];
 186                     goto found;
 187                 }
 188             }
 189             return NULL;
 190         }
 191         else
 192         {
 193             ordinal = LOWORD(funcName) - exports->Base;
 194             if (snoop && name)
 195             {
 196                 for (i = 0; i < exports->NumberOfNames; i++)
 197                     if (ordinals[i] == ordinal)
 198                     {
 199                         ename = RVA(name[i]);
 200                         break;
 201                     }
 202             }
 203         }
 204
 205  found:
 206         if (ordinal >= exports->NumberOfFunctions)
 207         {
 208             TRACE("     ordinal %ld out of range!\n", ordinal + exports->Base );
 209             return NULL;
 210         }
 211         addr = function[ordinal];
 212         if (!addr) return NULL;
 213         if ((addr < rva_start) || (addr >= rva_end))
 214         {
 215             FARPROC proc = RVA(addr);
 216             if (snoop)
 217             {
 218                 if (!ename) ename = "@";
 219 //                proc = SNOOP_GetProcAddress(wm->module,ename,ordinal,proc);
 220                 TRACE("SNOOP_GetProcAddress n/a\n");
 221
 222             }
 223             return proc;
 224         }
 225         else
 226         {
 227                 WINE_MODREF *wm;
 228                 char *forward = RVA(addr);
 229                 char module[256];
 230                 char *end = strchr(forward, '.');
 231
 232                 if (!end) return NULL;
 233                 if (end - forward >= sizeof(module)) return NULL;
 234                 memcpy( module, forward, end - forward );
 235                 module[end-forward] = 0;
 236                 if (!(wm = MODULE_FindModule( module )))
 237                 {
 238                     ERR("module not found for forward '%s'\n", forward );
 239                     return NULL;
 240                 }
 241                 return MODULE_GetProcAddress( wm->module, end + 1, snoop );
 242         }
 243 }
 244
 245 static DWORD fixup_imports( WINE_MODREF *wm )
 246 {
 247     IMAGE_IMPORT_DESCRIPTOR     *pe_imp;
 248     PE_MODREF                   *pem;
 249     unsigned int load_addr      = wm->module;
 250     int                         i,characteristics_detection=1;
 251     char                        *modname;
 252
 253     assert(wm->type==MODULE32_PE);
 254     pem = &(wm->binfmt.pe);
 255     if (pem->pe_export)
 256         modname = (char*) RVA(pem->pe_export->Name);
 257     else
 258         modname = "<unknown>";
 259
 260
 261     TRACE("Dumping imports list\n");
 262
 263
 264     pe_imp = pem->pe_import;
 265     if (!pe_imp) return 0;
 266
 267     /* We assume that we have at least one import with !0 characteristics and
 268      * detect broken imports with all characteristsics 0 (notably Borland) and
 269      * switch the detection off for them.
 270      */
 271     for (i = 0; pe_imp->Name ; pe_imp++) {
 272         if (!i && !pe_imp->u.Characteristics)
 273                 characteristics_detection = 0;
 274         if (characteristics_detection && !pe_imp->u.Characteristics)
 275                 break;
 276         i++;
 277     }
 278     if (!i) return 0;
 279
 280
 281     wm->nDeps = i;
 282     wm->deps  = HeapAlloc( GetProcessHeap(), 0, i*sizeof(WINE_MODREF *) );
 283
 284     /* load the imported modules. They are automatically
 285      * added to the modref list of the process.
 286      */
 287
 288     for (i = 0, pe_imp = pem->pe_import; pe_imp->Name ; pe_imp++) {
 289         WINE_MODREF             *wmImp;
 290         IMAGE_IMPORT_BY_NAME    *pe_name;
 291         PIMAGE_THUNK_DATA       import_list,thunk_list;
 292         char                    *name = (char *) RVA(pe_imp->Name);
 293
 294         if (characteristics_detection && !pe_imp->u.Characteristics)
 295                 break;
 296
 297 //#warning FIXME: here we should fill imports
 298         TRACE("Loading imports for %s.dll\n", name);
 299
 300         if (pe_imp->u.OriginalFirstThunk != 0) {
 301             TRACE("Microsoft style imports used\n");
 302             import_list =(PIMAGE_THUNK_DATA) RVA(pe_imp->u.OriginalFirstThunk);
 303             thunk_list = (PIMAGE_THUNK_DATA) RVA(pe_imp->FirstThunk);
 304
 305             while (import_list->u1.Ordinal) {
 306                 if (IMAGE_SNAP_BY_ORDINAL(import_list->u1.Ordinal)) {
 307                     int ordinal = IMAGE_ORDINAL(import_list->u1.Ordinal);
 308
 309 //                  TRACE("--- Ordinal %s,%d\n", name, ordinal);
 310
 311                     thunk_list->u1.Function=LookupExternal(name, ordinal);
 312                 } else {
 313                     pe_name = (PIMAGE_IMPORT_BY_NAME)RVA(import_list->u1.AddressOfData);
 314 //                  TRACE("--- %s %s.%d\n", pe_name->Name, name, pe_name->Hint);
 315                     thunk_list->u1.Function=LookupExternalByName(name, pe_name->Name);
 316                 }
 317                 import_list++;
 318                 thunk_list++;
 319             }
 320         } else {
 321             TRACE("Borland style imports used\n");
 322             thunk_list = (PIMAGE_THUNK_DATA) RVA(pe_imp->FirstThunk);
 323             while (thunk_list->u1.Ordinal) {
 324                 if (IMAGE_SNAP_BY_ORDINAL(thunk_list->u1.Ordinal)) {
 325
 326                     int ordinal = IMAGE_ORDINAL(thunk_list->u1.Ordinal);
 327
 328                     TRACE("--- Ordinal %s.%d\n",name,ordinal);
 329                     thunk_list->u1.Function=LookupExternal(
 330                       name, ordinal);
 331                 } else {
 332                     pe_name=(PIMAGE_IMPORT_BY_NAME) RVA(thunk_list->u1.AddressOfData);
 333                     TRACE("--- %s %s.%d\n",
 334                                   pe_name->Name,name,pe_name->Hint);
 335                     thunk_list->u1.Function=LookupExternalByName(
 336                       name, pe_name->Name);
 337                 }
 338                 thunk_list++;
 339             }
 340         }
 341     }
 342     return 0;
 343 }
 344
 345 static int calc_vma_size( HMODULE hModule )
 346 {
 347     int i,vma_size = 0;
 348     IMAGE_SECTION_HEADER *pe_seg = PE_SECTIONS(hModule);
 349
 350     TRACE("Dump of segment table\n");
 351     TRACE("   Name    VSz  Vaddr     SzRaw   Fileadr  *Reloc *Lineum #Reloc #Linum Char\n");
 352     for (i = 0; i< PE_HEADER(hModule)->FileHeader.NumberOfSections; i++)
 353     {
 354         TRACE("%8s: %4.4lx %8.8lx %8.8lx %8.8lx %8.8lx %8.8lx %4.4x %4.4x %8.8lx\n",
 355                       pe_seg->Name,
 356                       pe_seg->Misc.VirtualSize,
 357                       pe_seg->VirtualAddress,
 358                       pe_seg->SizeOfRawData,
 359                       pe_seg->PointerToRawData,
 360                       pe_seg->PointerToRelocations,
 361                       pe_seg->PointerToLinenumbers,
 362                       pe_seg->NumberOfRelocations,
 363                       pe_seg->NumberOfLinenumbers,
 364                       pe_seg->Characteristics);
 365         vma_size=max(vma_size, pe_seg->VirtualAddress+pe_seg->SizeOfRawData);
 366         vma_size=max(vma_size, pe_seg->VirtualAddress+pe_seg->Misc.VirtualSize);
 367         pe_seg++;
 368     }
 369     return vma_size;
 370 }
 371
 372 static void do_relocations( unsigned int load_addr, IMAGE_BASE_RELOCATION *r )
 373 {
 374     int delta = load_addr - PE_HEADER(load_addr)->OptionalHeader.ImageBase;
 375     int hdelta = (delta >> 16) & 0xFFFF;
 376     int ldelta = delta & 0xFFFF;
 377
 378         if(delta == 0)
 379
 380                 return;
 381         while(r->VirtualAddress)
 382         {
 383                 char *page = (char*) RVA(r->VirtualAddress);
 384                 int count = (r->SizeOfBlock - 8)/2;
 385                 int i;
 386                 TRACE_(fixup)("%x relocations for page %lx\n",
 387                         count, r->VirtualAddress);
 388
 389                 for(i=0;i<count;i++)
 390                 {
 391                         int offset = r->TypeOffset[i] & 0xFFF;
 392                         int type = r->TypeOffset[i] >> 12;
 393 //                      TRACE_(fixup)("patching %x type %x\n", offset, type);
 394                         switch(type)
 395                         {
 396                         case IMAGE_REL_BASED_ABSOLUTE: break;
 397                         case IMAGE_REL_BASED_HIGH:
 398                                 *(short*)(page+offset) += hdelta;
 399                                 break;
 400                         case IMAGE_REL_BASED_LOW:
 401                                 *(short*)(page+offset) += ldelta;
 402                                 break;
 403                         case IMAGE_REL_BASED_HIGHLOW:
 404                                 *(int*)(page+offset) += delta;
 405
 406                                 break;
 407                         case IMAGE_REL_BASED_HIGHADJ:
 408                                 FIXME("Don't know what to do with IMAGE_REL_BASED_HIGHADJ\n");
 409                                 break;
 410                         case IMAGE_REL_BASED_MIPS_JMPADDR:
 411                                 FIXME("Is this a MIPS machine ???\n");
 412                                 break;
 413                         default:
 414                                 FIXME("Unknown fixup type\n");
 415                                 break;
 416                         }
 417                 }
 418                 r = (IMAGE_BASE_RELOCATION*)((char*)r + r->SizeOfBlock);
 419         }
 420 }
 421
 422
 423
 424
 425
 426 /**********************************************************************
 427  *                      PE_LoadImage
 428  * Load one PE format DLL/EXE into memory
 429  *
 430  * Unluckily we can't just mmap the sections where we want them, for
 431  * (at least) Linux does only support offsets which are page-aligned.
 432  *
 433  * BUT we have to map the whole image anyway, for Win32 programs sometimes
 434  * want to access them. (HMODULE32 point to the start of it)
 435  */
 436 HMODULE PE_LoadImage( int handle, LPCSTR filename, WORD *version )
 437 {
 438     HMODULE     hModule;
 439     HANDLE      mapping;
 440
 441     IMAGE_NT_HEADERS *nt;
 442     IMAGE_SECTION_HEADER *pe_sec;
 443     IMAGE_DATA_DIRECTORY *dir;
 444     BY_HANDLE_FILE_INFORMATION bhfi;
 445     int i, rawsize, lowest_va, vma_size, file_size = 0;
 446     DWORD load_addr = 0, aoep, reloc = 0;
 447 //    struct get_read_fd_request *req = get_req_buffer();
 448     int unix_handle = handle;
 449     int page_size = getpagesize();
 450
 451
 452 //    if ( GetFileInformationByHandle( hFile, &bhfi ) )
 453 //      file_size = bhfi.nFileSizeLow;
 454     file_size=lseek(handle, 0, SEEK_END);
 455     lseek(handle, 0, SEEK_SET);
 456
 457 //#warning fix CreateFileMappingA
 458     mapping = CreateFileMappingA( handle, NULL, PAGE_READONLY | SEC_COMMIT,
 459                                     0, 0, NULL );
 460     if (!mapping)
 461     {
 462         WARN("CreateFileMapping error %ld\n", GetLastError() );
 463         return 0;
 464     }
 465 //    hModule = (HMODULE)MapViewOfFile( mapping, FILE_MAP_READ, 0, 0, 0 );
 466     hModule=(HMODULE)mapping;
 467 //    CloseHandle( mapping );
 468     if (!hModule)
 469     {
 470         WARN("MapViewOfFile error %ld\n", GetLastError() );
 471         return 0;
 472     }
 473     if ( *(WORD*)hModule !=IMAGE_DOS_SIGNATURE)
 474     {
 475         WARN("%s image doesn't have DOS signature, but 0x%04x\n", filename,*(WORD*)hModule);
 476         goto error;
 477     }
 478
 479     nt = PE_HEADER( hModule );
 480
 481
 482     if ( nt->Signature != IMAGE_NT_SIGNATURE )
 483     {
 484         WARN("%s image doesn't have PE signature, but 0x%08lx\n", filename, nt->Signature );
 485         goto error;
 486     }
 487
 488
 489     if ( nt->FileHeader.Machine != IMAGE_FILE_MACHINE_I386 )
 490     {
 491         MESSAGE("Trying to load PE image for unsupported architecture (");
 492         switch (nt->FileHeader.Machine)
 493         {
 494         case IMAGE_FILE_MACHINE_UNKNOWN: MESSAGE("Unknown"); break;
 495         case IMAGE_FILE_MACHINE_I860:    MESSAGE("I860"); break;
 496         case IMAGE_FILE_MACHINE_R3000:   MESSAGE("R3000"); break;
 497         case IMAGE_FILE_MACHINE_R4000:   MESSAGE("R4000"); break;
 498         case IMAGE_FILE_MACHINE_R10000:  MESSAGE("R10000"); break;
 499         case IMAGE_FILE_MACHINE_ALPHA:   MESSAGE("Alpha"); break;
 500         case IMAGE_FILE_MACHINE_POWERPC: MESSAGE("PowerPC"); break;
 501         default: MESSAGE("Unknown-%04x", nt->FileHeader.Machine); break;
 502         }
 503         MESSAGE(")\n");
 504         goto error;
 505     }
 506
 507
 508     pe_sec = PE_SECTIONS( hModule );
 509     rawsize = 0; lowest_va = 0x10000;
 510     for (i = 0; i < nt->FileHeader.NumberOfSections; i++)
 511     {
 512         if (lowest_va > pe_sec[i].VirtualAddress)
 513            lowest_va = pe_sec[i].VirtualAddress;
 514         if (pe_sec[i].Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA)
 515             continue;
 516         if (pe_sec[i].PointerToRawData+pe_sec[i].SizeOfRawData > rawsize)
 517             rawsize = pe_sec[i].PointerToRawData+pe_sec[i].SizeOfRawData;
 518     }
 519
 520
 521     if ( file_size && file_size < rawsize )
 522     {
 523         ERR("PE module is too small (header: %d, filesize: %d), "
 524                     "probably truncated download?\n",
 525                     rawsize, file_size );
 526         goto error;
 527     }
 528
 529
 530     aoep = nt->OptionalHeader.AddressOfEntryPoint;
 531     if (aoep && (aoep < lowest_va))
 532         FIXME("VIRUS WARNING: '%s' has an invalid entrypoint (0x%08lx) "
 533                       "below the first virtual address (0x%08x) "
 534                       "(possibly infected by Tchernobyl/SpaceFiller virus)!\n",
 535                        filename, aoep, lowest_va );
 536
 537
 538     /* FIXME:  Hack!  While we don't really support shared sections yet,
 539      *         this checks for those special cases where the whole DLL
 540      *         consists only of shared sections and is mapped into the
 541      *         shared address space > 2GB.  In this case, we assume that
 542      *         the module got mapped at its base address. Thus we simply
 543      *         check whether the module has actually been mapped there
 544      *         and use it, if so.  This is needed to get Win95 USER32.DLL
 545      *         to work (until we support shared sections properly).
 546      */
 547
 548     if ( nt->OptionalHeader.ImageBase & 0x80000000 )
 549     {
 550         HMODULE sharedMod = (HMODULE)nt->OptionalHeader.ImageBase;
 551         IMAGE_NT_HEADERS *sharedNt = (PIMAGE_NT_HEADERS)
 552                ( (LPBYTE)sharedMod + ((LPBYTE)nt - (LPBYTE)hModule) );
 553
 554         /* Well, this check is not really comprehensive,
 555            but should be good enough for now ... */
 556         if (    !IsBadReadPtr( (LPBYTE)sharedMod, sizeof(IMAGE_DOS_HEADER) )
 557              && memcmp( (LPBYTE)sharedMod, (LPBYTE)hModule, sizeof(IMAGE_DOS_HEADER) ) == 0
 558              && !IsBadReadPtr( sharedNt, sizeof(IMAGE_NT_HEADERS) )
 559              && memcmp( sharedNt, nt, sizeof(IMAGE_NT_HEADERS) ) == 0 )
 560         {
 561             UnmapViewOfFile( (LPVOID)hModule );
 562             return sharedMod;
 563         }
 564     }
 565
 566
 567
 568     load_addr = nt->OptionalHeader.ImageBase;
 569     vma_size = calc_vma_size( hModule );
 570
 571     load_addr = (DWORD)VirtualAlloc( (void*)load_addr, vma_size,
 572                                      MEM_RESERVE | MEM_COMMIT,
 573                                      PAGE_EXECUTE_READWRITE );
 574     if (load_addr == 0)
 575     {
 576
 577         FIXME("We need to perform base relocations for %s\n", filename);
 578         dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_BASERELOC;
 579         if (dir->Size)
 580             reloc = dir->VirtualAddress;
 581         else
 582         {
 583             FIXME( "FATAL: Need to relocate %s, but no relocation records present (%s). Try to run that file directly !\n",
 584                    filename,
 585                    (nt->FileHeader.Characteristics&IMAGE_FILE_RELOCS_STRIPPED)?
 586                    "stripped during link" : "unknown reason" );
 587             goto error;
 588         }
 589
 590         /* FIXME: If we need to relocate a system DLL (base > 2GB) we should
 591          *        really make sure that the *new* base address is also > 2GB.
 592          *        Some DLLs really check the MSB of the module handle :-/
 593          */
 594         if ( nt->OptionalHeader.ImageBase & 0x80000000 )
 595             ERR( "Forced to relocate system DLL (base > 2GB). This is not good.\n" );
 596
 597         load_addr = (DWORD)VirtualAlloc( NULL, vma_size,
 598                                          MEM_RESERVE | MEM_COMMIT,
 599                                          PAGE_EXECUTE_READWRITE );
 600         if (!load_addr) {
 601             FIXME_(win32)(
 602                    "FATAL: Couldn't load module %s (out of memory, %d needed)!\n", filename, vma_size);
 603             goto error;
 604         }
 605     }
 606
 607     TRACE("Load addr is %lx (base %lx), range %x\n",
 608           load_addr, nt->OptionalHeader.ImageBase, vma_size );
 609     TRACE_(segment)("Loading %s at %lx, range %x\n",
 610                     filename, load_addr, vma_size );
 611
 612 #if 0
 613
 614     *(PIMAGE_DOS_HEADER)load_addr = *(PIMAGE_DOS_HEADER)hModule;
 615     *PE_HEADER( load_addr ) = *nt;
 616     memcpy( PE_SECTIONS(load_addr), PE_SECTIONS(hModule),
 617             sizeof(IMAGE_SECTION_HEADER) * nt->FileHeader.NumberOfSections );
 618
 619
 620     memcpy( load_addr, hModule, lowest_fa );
 621 #endif
 622
 623     if ((void*)FILE_dommap( handle, (void *)load_addr, 0, nt->OptionalHeader.SizeOfHeaders,
 624                      0, 0, PROT_EXEC | PROT_WRITE | PROT_READ,
 625                      MAP_PRIVATE | MAP_FIXED ) != (void*)load_addr)
 626     {
 627         ERR_(win32)( "Critical Error: failed to map PE header to necessary address.\n");
 628         goto error;
 629     }
 630
 631
 632     pe_sec = PE_SECTIONS( hModule );
 633     for (i = 0; i < nt->FileHeader.NumberOfSections; i++, pe_sec++)
 634     {
 635         if (!pe_sec->SizeOfRawData || !pe_sec->PointerToRawData) continue;
 636         TRACE("%s: mmaping section %s at %p off %lx size %lx/%lx\n",
 637               filename, pe_sec->Name, (void*)RVA(pe_sec->VirtualAddress),
 638               pe_sec->PointerToRawData, pe_sec->SizeOfRawData, pe_sec->Misc.VirtualSize );
 639         if ((void*)FILE_dommap( unix_handle, (void*)RVA(pe_sec->VirtualAddress),
 640                          0, pe_sec->SizeOfRawData, 0, pe_sec->PointerToRawData,
 641                          PROT_EXEC | PROT_WRITE | PROT_READ,
 642                          MAP_PRIVATE | MAP_FIXED ) != (void*)RVA(pe_sec->VirtualAddress))
 643         {
 644
 645             ERR_(win32)( "Critical Error: failed to map PE section to necessary address.\n");
 646             goto error;
 647         }
 648         if ((pe_sec->SizeOfRawData < pe_sec->Misc.VirtualSize) &&
 649             (pe_sec->SizeOfRawData & (page_size-1)))
 650         {
 651             DWORD end = (pe_sec->SizeOfRawData & ~(page_size-1)) + page_size;
 652             if (end > pe_sec->Misc.VirtualSize) end = pe_sec->Misc.VirtualSize;
 653             TRACE("clearing %p - %p\n",
 654                   RVA(pe_sec->VirtualAddress) + pe_sec->SizeOfRawData,
 655                   RVA(pe_sec->VirtualAddress) + end );
 656             memset( (char*)RVA(pe_sec->VirtualAddress) + pe_sec->SizeOfRawData, 0,
 657                     end - pe_sec->SizeOfRawData );
 658         }
 659     }
 660
 661
 662     if ( reloc )
 663         do_relocations( load_addr, (IMAGE_BASE_RELOCATION *)RVA(reloc) );
 664
 665
 666     *version =   ( (nt->OptionalHeader.MajorSubsystemVersion & 0xff) << 8 )
 667                |   (nt->OptionalHeader.MinorSubsystemVersion & 0xff);
 668
 669
 670     UnmapViewOfFile( (LPVOID)hModule );
 671     return (HMODULE)load_addr;
 672
 673 error:
 674     if (unix_handle != -1) close( unix_handle );
 675     if (load_addr)
 676     VirtualFree( (LPVOID)load_addr, 0, MEM_RELEASE );
 677     UnmapViewOfFile( (LPVOID)hModule );
 678     return 0;
 679 }
 680
 681 /**********************************************************************
 682  *                 PE_CreateModule
 683  *
 684  * Create WINE_MODREF structure for loaded HMODULE32, link it into
 685  * process modref_list, and fixup all imports.
 686  *
 687  * Note: hModule must point to a correctly allocated PE image,
 688  *       with base relocations applied; the 16-bit dummy module
 689  *       associated to hModule must already exist.
 690  *
 691  * Note: This routine must always be called in the context of the
 692  *       process that is to own the module to be created.
 693  */
 694 WINE_MODREF *PE_CreateModule( HMODULE hModule,
 695                               LPCSTR filename, DWORD flags, WIN_BOOL builtin )
 696 {
 697     DWORD load_addr = (DWORD)hModule;
 698     IMAGE_NT_HEADERS *nt = PE_HEADER(hModule);
 699     IMAGE_DATA_DIRECTORY *dir;
 700     IMAGE_IMPORT_DESCRIPTOR *pe_import = NULL;
 701     IMAGE_EXPORT_DIRECTORY *pe_export = NULL;
 702     IMAGE_RESOURCE_DIRECTORY *pe_resource = NULL;
 703     WINE_MODREF *wm;
 704     int result;
 705
 706
 707
 708
 709     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_EXPORT;
 710     if (dir->Size)
 711         pe_export = (PIMAGE_EXPORT_DIRECTORY)RVA(dir->VirtualAddress);
 712
 713     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_IMPORT;
 714     if (dir->Size)
 715         pe_import = (PIMAGE_IMPORT_DESCRIPTOR)RVA(dir->VirtualAddress);
 716
 717     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_RESOURCE;
 718     if (dir->Size)
 719         pe_resource = (PIMAGE_RESOURCE_DIRECTORY)RVA(dir->VirtualAddress);
 720
 721     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_EXCEPTION;
 722     if (dir->Size) FIXME("Exception directory ignored\n" );
 723
 724     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_SECURITY;
 725     if (dir->Size) FIXME("Security directory ignored\n" );
 726
 727
 728
 729
 730     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_DEBUG;
 731     if (dir->Size) TRACE("Debug directory ignored\n" );
 732
 733     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_COPYRIGHT;
 734     if (dir->Size) FIXME("Copyright string ignored\n" );
 735
 736     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_GLOBALPTR;
 737     if (dir->Size) FIXME("Global Pointer (MIPS) ignored\n" );
 738
 739
 740
 741     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG;
 742     if (dir->Size) FIXME("Load Configuration directory ignored\n" );
 743
 744     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT;
 745     if (dir->Size) TRACE("Bound Import directory ignored\n" );
 746
 747     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_IAT;
 748     if (dir->Size) TRACE("Import Address Table directory ignored\n" );
 749
 750     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_DELAY_IMPORT;
 751     if (dir->Size)
 752     {
 753                 TRACE("Delayed import, stub calls LoadLibrary\n" );
 754                 /*
 755                  * Nothing to do here.
 756                  */
 757
 758 #ifdef ImgDelayDescr
 759                 /*
 760                  * This code is useful to observe what the heck is going on.
 761                  */
 762                 {
 763                 ImgDelayDescr *pe_delay = NULL;
 764         pe_delay = (PImgDelayDescr)RVA(dir->VirtualAddress);
 765         TRACE_(delayhlp)("pe_delay->grAttrs = %08x\n", pe_delay->grAttrs);
 766         TRACE_(delayhlp)("pe_delay->szName = %s\n", pe_delay->szName);
 767         TRACE_(delayhlp)("pe_delay->phmod = %08x\n", pe_delay->phmod);
 768         TRACE_(delayhlp)("pe_delay->pIAT = %08x\n", pe_delay->pIAT);
 769         TRACE_(delayhlp)("pe_delay->pINT = %08x\n", pe_delay->pINT);
 770         TRACE_(delayhlp)("pe_delay->pBoundIAT = %08x\n", pe_delay->pBoundIAT);
 771         TRACE_(delayhlp)("pe_delay->pUnloadIAT = %08x\n", pe_delay->pUnloadIAT);
 772         TRACE_(delayhlp)("pe_delay->dwTimeStamp = %08x\n", pe_delay->dwTimeStamp);
 773         }
 774 #endif
 775         }
 776
 777     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR;
 778     if (dir->Size) FIXME("Unknown directory 14 ignored\n" );
 779
 780     dir = nt->OptionalHeader.DataDirectory+15;
 781     if (dir->Size) FIXME("Unknown directory 15 ignored\n" );
 782
 783
 784
 785
 786     wm = (WINE_MODREF *)HeapAlloc( GetProcessHeap(),
 787                                    HEAP_ZERO_MEMORY, sizeof(*wm) );
 788     wm->module = hModule;
 789
 790     if ( builtin )
 791         wm->flags |= WINE_MODREF_INTERNAL;
 792     if ( flags & DONT_RESOLVE_DLL_REFERENCES )
 793         wm->flags |= WINE_MODREF_DONT_RESOLVE_REFS;
 794     if ( flags & LOAD_LIBRARY_AS_DATAFILE )
 795         wm->flags |= WINE_MODREF_LOAD_AS_DATAFILE;
 796
 797     wm->type = MODULE32_PE;
 798     wm->binfmt.pe.pe_export = pe_export;
 799     wm->binfmt.pe.pe_import = pe_import;
 800     wm->binfmt.pe.pe_resource = pe_resource;
 801     wm->binfmt.pe.tlsindex = -1;
 802
 803     wm->filename = malloc(strlen(filename)+1);
 804     strcpy(wm->filename, filename );
 805     wm->modname = strrchr( wm->filename, '\\' );
 806     if (!wm->modname) wm->modname = wm->filename;
 807     else wm->modname++;
 808
 809     if ( pe_export )
 810         dump_exports( hModule );
 811
 812     /* Fixup Imports */
 813
 814     if (    pe_import
 815          && !( wm->flags & WINE_MODREF_LOAD_AS_DATAFILE )
 816          && !( wm->flags & WINE_MODREF_DONT_RESOLVE_REFS )
 817          && fixup_imports( wm ) )
 818     {
 819         /* remove entry from modref chain */
 820          return NULL;
 821     }
 822
 823     return wm;
 824
 825     return wm;
 826 }
 827
 828 /******************************************************************************
 829  * The PE Library Loader frontend.
 830  * FIXME: handle the flags.
 831  */
 832 WINE_MODREF *PE_LoadLibraryExA (LPCSTR name, DWORD flags)
 833 {
 834         HMODULE         hModule32;
 835         WINE_MODREF     *wm;
 836         char            filename[256];
 837         int hFile;
 838         WORD            version = 0;
 839
 840
 841         strncpy(filename, name, sizeof(filename));
 842         hFile=open(filename, O_RDONLY);
 843         if(hFile==-1)
 844             return NULL;
 845
 846
 847         hModule32 = PE_LoadImage( hFile, filename, &version );
 848         if (!hModule32)
 849         {
 850                 SetLastError( ERROR_OUTOFMEMORY );
 851                 return NULL;
 852         }
 853
 854         if ( !(wm = PE_CreateModule( hModule32, filename, flags, FALSE )) )
 855         {
 856                 ERR( "can't load %s\n", filename );
 857                 SetLastError( ERROR_OUTOFMEMORY );
 858                 return NULL;
 859         }
 860         close(hFile);
 861         //printf("^^^^^^^^^^^^^^^^Alloc VM1  %p\n", wm);
 862         return wm;
 863 }
 864
 865
 866 /*****************************************************************************
 867  *      PE_UnloadLibrary
 868  *
 869  * Unload the library unmapping the image and freeing the modref structure.
 870  */
 871 void PE_UnloadLibrary(WINE_MODREF *wm)
 872 {
 873     TRACE(" unloading %s\n", wm->filename);
 874
 875     if (wm->filename)
 876         free(wm->filename);
 877     if (wm->short_filename)
 878         free(wm->short_filename);
 879     HeapFree( GetProcessHeap(), 0, wm->deps );
 880     VirtualFree( (LPVOID)wm->module, 0, MEM_RELEASE );
 881     HeapFree( GetProcessHeap(), 0, wm );
 882     //printf("^^^^^^^^^^^^^^^^Free VM1  %p\n", wm);
 883 }
 884
 885 /*****************************************************************************
 886  * Load the PE main .EXE. All other loading is done by PE_LoadLibraryExA
 887  * FIXME: this function should use PE_LoadLibraryExA, but currently can't
 888  * due to the PROCESS_Create stuff.
 889  */
 890
 891
 892 /*
 893  * This is a dirty hack.
 894  * The win32 DLLs contain an alloca routine, that first probes the soon
 895  * to be allocated new memory *below* the current stack pointer in 4KByte
 896  * increments.  After the mem probing below the current %esp,  the stack
 897  * pointer is finally decremented to make room for the "alloca"ed memory.
 898  * Maybe the probing code is intended to extend the stack on a windows box.
 899  * Anyway, the linux kernel does *not* extend the stack by simply accessing
 900  * memory below %esp;  it segfaults.
 901  * The extend_stack_for_dll_alloca() routine just preallocates a big chunk
 902  * of memory on the stack, for use by the DLLs alloca routine.
 903  * Added the noinline attribute as e.g. gcc 3.2.2 inlines this function
 904  * in a way that breaks it.
 905  */
 906 static void __attribute__((noinline)) extend_stack_for_dll_alloca(void)
 907 {
 908 #if !defined(__FreeBSD__) && !defined(__DragonFly__)
 909     volatile int* mem=alloca(0x20000);
 910     *mem=0x1234;
 911 #endif
 912 }
 913
 914 /* Called if the library is loaded or freed.
 915  * NOTE: if a thread attaches a DLL, the current thread will only do
 916  * DLL_PROCESS_ATTACH. Only new created threads do DLL_THREAD_ATTACH
 917  * (SDK)
 918  */
 919 WIN_BOOL PE_InitDLL( WINE_MODREF *wm, DWORD type, LPVOID lpReserved )
 920 {
 921     WIN_BOOL retv = TRUE;
 922     assert( wm->type == MODULE32_PE );
 923
 924
 925     if ((PE_HEADER(wm->module)->FileHeader.Characteristics & IMAGE_FILE_DLL) &&
 926         (PE_HEADER(wm->module)->OptionalHeader.AddressOfEntryPoint)
 927     ) {
 928         DLLENTRYPROC entry ;
 929         entry = (void*)PE_FindExportedFunction(wm, "DllMain", 0);
 930         if(entry==NULL)
 931             entry = (void*)RVA_PTR( wm->module,OptionalHeader.AddressOfEntryPoint );
 932
 933         TRACE_(relay)("CallTo32(entryproc=%p,module=%08x,type=%ld,res=%p)\n",
 934                        entry, wm->module, type, lpReserved );
 935
 936
 937         TRACE("Entering DllMain(");
 938         switch(type)
 939         {
 940             case DLL_PROCESS_DETACH:
 941                 TRACE("DLL_PROCESS_DETACH) ");
 942                 break;
 943             case DLL_PROCESS_ATTACH:
 944                 TRACE("DLL_PROCESS_ATTACH) ");
 945                 break;
 946             case DLL_THREAD_DETACH:
 947                 TRACE("DLL_THREAD_DETACH) ");
 948                 break;
 949             case DLL_THREAD_ATTACH:
 950                 TRACE("DLL_THREAD_ATTACH) ");
 951                 break;
 952         }
 953         TRACE("for %s\n", wm->filename);
 954         extend_stack_for_dll_alloca();
 955         retv = entry( wm->module, type, lpReserved );
 956     }
 957
 958     return retv;
 959 }
 960
 961 static LPVOID
 962 _fixup_address(PIMAGE_OPTIONAL_HEADER opt,int delta,LPVOID addr) {
 963         if (    ((DWORD)addr>opt->ImageBase) &&
 964                 ((DWORD)addr<opt->ImageBase+opt->SizeOfImage)
 965         )
 966
 967                 return (LPVOID)(((DWORD)addr)+delta);
 968         else
 969
 970                 return addr;
 971 }