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

   1 /*
   2  * $Id$
   3  *
   4  *  Copyright   1994    Eric Youndale & Erik Bos
   5  *  Copyright   1995    Martin von Löwis
   6  *  Copyright   1996-98 Marcus Meissner
   7  *
   8  *      based on Eric Youndale's pe-test and:
   9  *
  10  *      ftp.microsoft.com:/pub/developer/MSDN/CD8/PEFILE.ZIP
  11  * make that:
  12  *      ftp.microsoft.com:/developr/MSDN/OctCD/PEFILE.ZIP
  13  *
  14  * Modified for use with MPlayer, detailed CVS changelog at
  15  * http://www.mplayerhq.hu/cgi-bin/cvsweb.cgi/main/
  16  *
  17  * File now distributed as part of VLC media player with no modifications.
  18  *
  19  * This program is free software; you can redistribute it and/or modify
  20  * it under the terms of the GNU General Public License as published by
  21  * the Free Software Foundation; either version 2 of the License, or
  22  * (at your option) any later version.
  23  *
  24  * This program is distributed in the hope that it will be useful,
  25  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  26  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  27  * GNU General Public License for more details.
  28  *
  29  * You should have received a copy of the GNU General Public License
  30  * along with this program; if not, write to the Free Software
  31  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  32  */
  33 /* Notes:
  34  * Before you start changing something in this file be aware of the following:
  35  *
  36  * - There are several functions called recursively. In a very subtle and
  37  *   obscure way. DLLs can reference each other recursively etc.
  38  * - If you want to enhance, speed up or clean up something in here, think
  39  *   twice WHY it is implemented in that strange way. There is usually a reason.
  40  *   Though sometimes it might just be lazyness ;)
  41  * - In PE_MapImage, right before fixup_imports() all external and internal
  42  *   state MUST be correct since this function can be called with the SAME image
  43  *   AGAIN. (Thats recursion for you.) That means MODREF.module and
  44  *   NE_MODULE.module32.
  45  * - Sometimes, we can't use Linux mmap() to mmap() the images directly.
  46  *
  47  *   The problem is, that there is not direct 1:1 mapping from a diskimage and
  48  *   a memoryimage. The headers at the start are mapped linear, but the sections
  49  *   are not. Older x86 pe binaries are 512 byte aligned in file and 4096 byte
  50  *   aligned in memory. Linux likes them 4096 byte aligned in memory (due to
  51  *   x86 pagesize, this cannot be fixed without a rather large kernel rewrite)
  52  *   and 'blocksize' file-aligned (offsets). Since we have 512/1024/2048 (CDROM)
  53  *   and other byte blocksizes, we can't always do this.  We *can* do this for
  54  *   newer pe binaries produced by MSVC 5 and later, since they are also aligned
  55  *   to 4096 byte boundaries on disk.
  56  */
  57 #include "config.h"
  58
  59 #include <errno.h>
  60 #include <assert.h>
  61 #include <stdio.h>
  62 #include <stdlib.h>
  63 #include <string.h>
  64 #include <unistd.h>
  65 #include <sys/types.h>
  66 #include <sys/stat.h>
  67 #include <fcntl.h>
  68 #ifdef HAVE_SYS_MMAN_H
  69 #include <sys/mman.h>
  70 #endif
  71 #include "wine/windef.h"
  72 #include "wine/winbase.h"
  73 #include "wine/winerror.h"
  74 #include "wine/heap.h"
  75 #include "wine/pe_image.h"
  76 #include "wine/module.h"
  77 #include "wine/debugtools.h"
  78 #include "ext.h"
  79 #include "win32.h"
  80
  81 #define RVA(x) ((void *)((char *)load_addr+(unsigned int)(x)))
  82
  83 #define AdjustPtr(ptr,delta) ((char *)(ptr) + (delta))
  84
  85 extern void* LookupExternal(const char* library, int ordinal);
  86 extern void* LookupExternalByName(const char* library, const char* name);
  87
  88 static void dump_exports( HMODULE hModule )
  89 {
  90   char          *Module;
  91   unsigned int i, j;
  92   u_short       *ordinal;
  93   u_long        *function,*functions;
  94   u_char        **name;
  95   unsigned int load_addr = hModule;
  96
  97   DWORD rva_start = PE_HEADER(hModule)->OptionalHeader
  98                    .DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress;
  99   DWORD rva_end = rva_start + PE_HEADER(hModule)->OptionalHeader
 100                    .DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].Size;
 101   IMAGE_EXPORT_DIRECTORY *pe_exports = (IMAGE_EXPORT_DIRECTORY*)RVA(rva_start);
 102
 103   Module = (char*)RVA(pe_exports->Name);
 104   TRACE("*******EXPORT DATA*******\n");
 105   TRACE("Module name is %s, %ld functions, %ld names\n",
 106         Module, pe_exports->NumberOfFunctions, pe_exports->NumberOfNames);
 107
 108   ordinal=(u_short*) RVA(pe_exports->AddressOfNameOrdinals);
 109   functions=function=(u_long*) RVA(pe_exports->AddressOfFunctions);
 110   name=(u_char**) RVA(pe_exports->AddressOfNames);
 111
 112   TRACE(" Ord    RVA     Addr   Name\n" );
 113   for (i=0;i<pe_exports->NumberOfFunctions;i++, function++)
 114   {
 115       if (!*function) continue;
 116       if (TRACE_ON(win32))
 117       {
 118         DPRINTF( "%4ld %08lx %p", i + pe_exports->Base, *function, RVA(*function) );
 119
 120         for (j = 0; j < pe_exports->NumberOfNames; j++)
 121           if (ordinal[j] == i)
 122           {
 123               DPRINTF( "  %s", (char*)RVA(name[j]) );
 124               break;
 125           }
 126         if ((*function >= rva_start) && (*function <= rva_end))
 127           DPRINTF(" (forwarded -> %s)", (char *)RVA(*function));
 128         DPRINTF("\n");
 129       }
 130   }
 131 }
 132
 133 /* Look up the specified function or ordinal in the exportlist:
 134  * If it is a string:
 135  *      - look up the name in the Name list.
 136  *      - look up the ordinal with that index.
 137  *      - use the ordinal as offset into the functionlist
 138  * If it is a ordinal:
 139  *      - use ordinal-pe_export->Base as offset into the functionlist
 140  */
 141 FARPROC PE_FindExportedFunction(
 142         WINE_MODREF *wm,
 143         LPCSTR funcName,
 144         WIN_BOOL snoop )
 145 {
 146         u_short                         * ordinals;
 147         u_long                          * function;
 148         u_char                          ** name;
 149         const char *ename = NULL;
 150         int                             i, ordinal;
 151         PE_MODREF                       *pem = &(wm->binfmt.pe);
 152         IMAGE_EXPORT_DIRECTORY          *exports = pem->pe_export;
 153         unsigned int                    load_addr = wm->module;
 154         u_long                          rva_start, rva_end, addr;
 155         char                            * forward;
 156
 157         if (HIWORD(funcName))
 158                 TRACE("(%s)\n",funcName);
 159         else
 160                 TRACE("(%d)\n",(int)funcName);
 161         if (!exports) {
 162                 /* Not a fatal problem, some apps do
 163                  * GetProcAddress(0,"RegisterPenApp") which triggers this
 164                  * case.
 165                  */
 166                 WARN("Module %08x(%s)/MODREF %p doesn't have a exports table.\n",wm->module,wm->modname,pem);
 167                 return NULL;
 168         }
 169         ordinals= (u_short*)  RVA(exports->AddressOfNameOrdinals);
 170         function= (u_long*)   RVA(exports->AddressOfFunctions);
 171         name    = (u_char **) RVA(exports->AddressOfNames);
 172         forward = NULL;
 173         rva_start = PE_HEADER(wm->module)->OptionalHeader
 174                 .DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress;
 175         rva_end = rva_start + PE_HEADER(wm->module)->OptionalHeader
 176                 .DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].Size;
 177
 178         if (HIWORD(funcName))
 179         {
 180
 181             int min = 0, max = exports->NumberOfNames - 1;
 182             while (min <= max)
 183             {
 184                 int res, pos = (min + max) / 2;
 185                 ename = (const char*) RVA(name[pos]);
 186                 if (!(res = strcmp( ename, funcName )))
 187                 {
 188                     ordinal = ordinals[pos];
 189                     goto found;
 190                 }
 191                 if (res > 0) max = pos - 1;
 192                 else min = pos + 1;
 193             }
 194
 195             for (i = 0; i < exports->NumberOfNames; i++)
 196             {
 197                 ename = (const char*) RVA(name[i]);
 198                 if (!strcmp( ename, funcName ))
 199                 {
 200                     ERR( "%s.%s required a linear search\n", wm->modname, funcName );
 201                     ordinal = ordinals[i];
 202                     goto found;
 203                 }
 204             }
 205             return NULL;
 206         }
 207         else
 208         {
 209             ordinal = LOWORD(funcName) - exports->Base;
 210             if (snoop && name)
 211             {
 212                 for (i = 0; i < exports->NumberOfNames; i++)
 213                     if (ordinals[i] == ordinal)
 214                     {
 215                         ename = RVA(name[i]);
 216                         break;
 217                     }
 218             }
 219         }
 220
 221  found:
 222         if (ordinal >= exports->NumberOfFunctions)
 223         {
 224             TRACE("     ordinal %ld out of range!\n", ordinal + exports->Base );
 225             return NULL;
 226         }
 227         addr = function[ordinal];
 228         if (!addr) return NULL;
 229         if ((addr < rva_start) || (addr >= rva_end))
 230         {
 231             FARPROC proc = RVA(addr);
 232             if (snoop)
 233             {
 234                 if (!ename) ename = "@";
 235 //                proc = SNOOP_GetProcAddress(wm->module,ename,ordinal,proc);
 236                 TRACE("SNOOP_GetProcAddress n/a\n");
 237
 238             }
 239             return proc;
 240         }
 241         else
 242         {
 243                 WINE_MODREF *wm;
 244                 char *forward = RVA(addr);
 245                 char module[256];
 246                 char *end = strchr(forward, '.');
 247
 248                 if (!end) return NULL;
 249                 if (end - forward >= sizeof(module)) return NULL;
 250                 memcpy( module, forward, end - forward );
 251                 module[end-forward] = 0;
 252                 if (!(wm = MODULE_FindModule( module )))
 253                 {
 254                     ERR("module not found for forward '%s'\n", forward );
 255                     return NULL;
 256                 }
 257                 return MODULE_GetProcAddress( wm->module, end + 1, snoop );
 258         }
 259 }
 260
 261 static DWORD fixup_imports( WINE_MODREF *wm )
 262 {
 263     IMAGE_IMPORT_DESCRIPTOR     *pe_imp;
 264     PE_MODREF                   *pem;
 265     unsigned int load_addr      = wm->module;
 266     int                         i,characteristics_detection=1;
 267     char                        *modname;
 268
 269     assert(wm->type==MODULE32_PE);
 270     pem = &(wm->binfmt.pe);
 271     if (pem->pe_export)
 272         modname = (char*) RVA(pem->pe_export->Name);
 273     else
 274         modname = "<unknown>";
 275
 276
 277     TRACE("Dumping imports list\n");
 278
 279
 280     pe_imp = pem->pe_import;
 281     if (!pe_imp) return 0;
 282
 283     /* We assume that we have at least one import with !0 characteristics and
 284      * detect broken imports with all characteristsics 0 (notably Borland) and
 285      * switch the detection off for them.
 286      */
 287     for (i = 0; pe_imp->Name ; pe_imp++) {
 288         if (!i && !pe_imp->u.Characteristics)
 289                 characteristics_detection = 0;
 290         if (characteristics_detection && !pe_imp->u.Characteristics)
 291                 break;
 292         i++;
 293     }
 294     if (!i) return 0;
 295
 296
 297     wm->nDeps = i;
 298     wm->deps  = HeapAlloc( GetProcessHeap(), 0, i*sizeof(WINE_MODREF *) );
 299
 300     /* load the imported modules. They are automatically
 301      * added to the modref list of the process.
 302      */
 303
 304     for (i = 0, pe_imp = pem->pe_import; pe_imp->Name ; pe_imp++) {
 305         WINE_MODREF             *wmImp;
 306         IMAGE_IMPORT_BY_NAME    *pe_name;
 307         PIMAGE_THUNK_DATA       import_list,thunk_list;
 308         char                    *name = (char *) RVA(pe_imp->Name);
 309
 310         if (characteristics_detection && !pe_imp->u.Characteristics)
 311                 break;
 312
 313 //#warning FIXME: here we should fill imports
 314         TRACE("Loading imports for %s.dll\n", name);
 315
 316         if (pe_imp->u.OriginalFirstThunk != 0) {
 317             TRACE("Microsoft style imports used\n");
 318             import_list =(PIMAGE_THUNK_DATA) RVA(pe_imp->u.OriginalFirstThunk);
 319             thunk_list = (PIMAGE_THUNK_DATA) RVA(pe_imp->FirstThunk);
 320
 321             while (import_list->u1.Ordinal) {
 322                 if (IMAGE_SNAP_BY_ORDINAL(import_list->u1.Ordinal)) {
 323                     int ordinal = IMAGE_ORDINAL(import_list->u1.Ordinal);
 324
 325 //                  TRACE("--- Ordinal %s,%d\n", name, ordinal);
 326
 327                     thunk_list->u1.Function=LookupExternal(name, ordinal);
 328                 } else {
 329                     pe_name = (PIMAGE_IMPORT_BY_NAME)RVA(import_list->u1.AddressOfData);
 330 //                  TRACE("--- %s %s.%d\n", pe_name->Name, name, pe_name->Hint);
 331                     thunk_list->u1.Function=LookupExternalByName(name, pe_name->Name);
 332                 }
 333                 import_list++;
 334                 thunk_list++;
 335             }
 336         } else {
 337             TRACE("Borland style imports used\n");
 338             thunk_list = (PIMAGE_THUNK_DATA) RVA(pe_imp->FirstThunk);
 339             while (thunk_list->u1.Ordinal) {
 340                 if (IMAGE_SNAP_BY_ORDINAL(thunk_list->u1.Ordinal)) {
 341
 342                     int ordinal = IMAGE_ORDINAL(thunk_list->u1.Ordinal);
 343
 344                     TRACE("--- Ordinal %s.%d\n",name,ordinal);
 345                     thunk_list->u1.Function=LookupExternal(
 346                       name, ordinal);
 347                 } else {
 348                     pe_name=(PIMAGE_IMPORT_BY_NAME) RVA(thunk_list->u1.AddressOfData);
 349                     TRACE("--- %s %s.%d\n",
 350                                   pe_name->Name,name,pe_name->Hint);
 351                     thunk_list->u1.Function=LookupExternalByName(
 352                       name, pe_name->Name);
 353                 }
 354                 thunk_list++;
 355             }
 356         }
 357     }
 358     return 0;
 359 }
 360
 361 static int calc_vma_size( HMODULE hModule )
 362 {
 363     int i,vma_size = 0;
 364     IMAGE_SECTION_HEADER *pe_seg = PE_SECTIONS(hModule);
 365
 366     TRACE("Dump of segment table\n");
 367     TRACE("   Name    VSz  Vaddr     SzRaw   Fileadr  *Reloc *Lineum #Reloc #Linum Char\n");
 368     for (i = 0; i< PE_HEADER(hModule)->FileHeader.NumberOfSections; i++)
 369     {
 370         TRACE("%8s: %4.4lx %8.8lx %8.8lx %8.8lx %8.8lx %8.8lx %4.4x %4.4x %8.8lx\n",
 371                       pe_seg->Name,
 372                       pe_seg->Misc.VirtualSize,
 373                       pe_seg->VirtualAddress,
 374                       pe_seg->SizeOfRawData,
 375                       pe_seg->PointerToRawData,
 376                       pe_seg->PointerToRelocations,
 377                       pe_seg->PointerToLinenumbers,
 378                       pe_seg->NumberOfRelocations,
 379                       pe_seg->NumberOfLinenumbers,
 380                       pe_seg->Characteristics);
 381         vma_size=max(vma_size, pe_seg->VirtualAddress+pe_seg->SizeOfRawData);
 382         vma_size=max(vma_size, pe_seg->VirtualAddress+pe_seg->Misc.VirtualSize);
 383         pe_seg++;
 384     }
 385     return vma_size;
 386 }
 387
 388 static void do_relocations( unsigned int load_addr, IMAGE_BASE_RELOCATION *r )
 389 {
 390     int delta = load_addr - PE_HEADER(load_addr)->OptionalHeader.ImageBase;
 391     int hdelta = (delta >> 16) & 0xFFFF;
 392     int ldelta = delta & 0xFFFF;
 393
 394         if(delta == 0)
 395
 396                 return;
 397         while(r->VirtualAddress)
 398         {
 399                 char *page = (char*) RVA(r->VirtualAddress);
 400                 int count = (r->SizeOfBlock - 8)/2;
 401                 int i;
 402                 TRACE_(fixup)("%x relocations for page %lx\n",
 403                         count, r->VirtualAddress);
 404
 405                 for(i=0;i<count;i++)
 406                 {
 407                         int offset = r->TypeOffset[i] & 0xFFF;
 408                         int type = r->TypeOffset[i] >> 12;
 409 //                      TRACE_(fixup)("patching %x type %x\n", offset, type);
 410                         switch(type)
 411                         {
 412                         case IMAGE_REL_BASED_ABSOLUTE: break;
 413                         case IMAGE_REL_BASED_HIGH:
 414                                 *(short*)(page+offset) += hdelta;
 415                                 break;
 416                         case IMAGE_REL_BASED_LOW:
 417                                 *(short*)(page+offset) += ldelta;
 418                                 break;
 419                         case IMAGE_REL_BASED_HIGHLOW:
 420                                 *(int*)(page+offset) += delta;
 421
 422                                 break;
 423                         case IMAGE_REL_BASED_HIGHADJ:
 424                                 FIXME("Don't know what to do with IMAGE_REL_BASED_HIGHADJ\n");
 425                                 break;
 426                         case IMAGE_REL_BASED_MIPS_JMPADDR:
 427                                 FIXME("Is this a MIPS machine ???\n");
 428                                 break;
 429                         default:
 430                                 FIXME("Unknown fixup type\n");
 431                                 break;
 432                         }
 433                 }
 434                 r = (IMAGE_BASE_RELOCATION*)((char*)r + r->SizeOfBlock);
 435         }
 436 }
 437
 438
 439
 440
 441
 442 /**********************************************************************
 443  *                      PE_LoadImage
 444  * Load one PE format DLL/EXE into memory
 445  *
 446  * Unluckily we can't just mmap the sections where we want them, for
 447  * (at least) Linux does only support offsets which are page-aligned.
 448  *
 449  * BUT we have to map the whole image anyway, for Win32 programs sometimes
 450  * want to access them. (HMODULE32 point to the start of it)
 451  */
 452 HMODULE PE_LoadImage( int handle, LPCSTR filename, WORD *version )
 453 {
 454     HMODULE     hModule;
 455     HANDLE      mapping;
 456
 457     IMAGE_NT_HEADERS *nt;
 458     IMAGE_SECTION_HEADER *pe_sec;
 459     IMAGE_DATA_DIRECTORY *dir;
 460     BY_HANDLE_FILE_INFORMATION bhfi;
 461     int i, rawsize, lowest_va, vma_size, file_size = 0;
 462     DWORD load_addr = 0, aoep, reloc = 0;
 463 //    struct get_read_fd_request *req = get_req_buffer();
 464     int unix_handle = handle;
 465     int page_size = getpagesize();
 466
 467
 468 //    if ( GetFileInformationByHandle( hFile, &bhfi ) )
 469 //      file_size = bhfi.nFileSizeLow;
 470     file_size=lseek(handle, 0, SEEK_END);
 471     lseek(handle, 0, SEEK_SET);
 472
 473 //#warning fix CreateFileMappingA
 474     mapping = CreateFileMappingA( handle, NULL, PAGE_READONLY | SEC_COMMIT,
 475                                     0, 0, NULL );
 476     if (!mapping)
 477     {
 478         WARN("CreateFileMapping error %ld\n", GetLastError() );
 479         return 0;
 480     }
 481 //    hModule = (HMODULE)MapViewOfFile( mapping, FILE_MAP_READ, 0, 0, 0 );
 482     hModule=(HMODULE)mapping;
 483 //    CloseHandle( mapping );
 484     if (!hModule)
 485     {
 486         WARN("MapViewOfFile error %ld\n", GetLastError() );
 487         return 0;
 488     }
 489     if ( *(WORD*)hModule !=IMAGE_DOS_SIGNATURE)
 490     {
 491         WARN("%s image doesn't have DOS signature, but 0x%04x\n", filename,*(WORD*)hModule);
 492         goto error;
 493     }
 494
 495     nt = PE_HEADER( hModule );
 496
 497
 498     if ( nt->Signature != IMAGE_NT_SIGNATURE )
 499     {
 500         WARN("%s image doesn't have PE signature, but 0x%08lx\n", filename, nt->Signature );
 501         goto error;
 502     }
 503
 504
 505     if ( nt->FileHeader.Machine != IMAGE_FILE_MACHINE_I386 )
 506     {
 507         MESSAGE("Trying to load PE image for unsupported architecture (");
 508         switch (nt->FileHeader.Machine)
 509         {
 510         case IMAGE_FILE_MACHINE_UNKNOWN: MESSAGE("Unknown"); break;
 511         case IMAGE_FILE_MACHINE_I860:    MESSAGE("I860"); break;
 512         case IMAGE_FILE_MACHINE_R3000:   MESSAGE("R3000"); break;
 513         case IMAGE_FILE_MACHINE_R4000:   MESSAGE("R4000"); break;
 514         case IMAGE_FILE_MACHINE_R10000:  MESSAGE("R10000"); break;
 515         case IMAGE_FILE_MACHINE_ALPHA:   MESSAGE("Alpha"); break;
 516         case IMAGE_FILE_MACHINE_POWERPC: MESSAGE("PowerPC"); break;
 517         default: MESSAGE("Unknown-%04x", nt->FileHeader.Machine); break;
 518         }
 519         MESSAGE(")\n");
 520         goto error;
 521     }
 522
 523
 524     pe_sec = PE_SECTIONS( hModule );
 525     rawsize = 0; lowest_va = 0x10000;
 526     for (i = 0; i < nt->FileHeader.NumberOfSections; i++)
 527     {
 528         if (lowest_va > pe_sec[i].VirtualAddress)
 529            lowest_va = pe_sec[i].VirtualAddress;
 530         if (pe_sec[i].Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA)
 531             continue;
 532         if (pe_sec[i].PointerToRawData+pe_sec[i].SizeOfRawData > rawsize)
 533             rawsize = pe_sec[i].PointerToRawData+pe_sec[i].SizeOfRawData;
 534     }
 535
 536
 537     if ( file_size && file_size < rawsize )
 538     {
 539         ERR("PE module is too small (header: %d, filesize: %d), "
 540                     "probably truncated download?\n",
 541                     rawsize, file_size );
 542         goto error;
 543     }
 544
 545
 546     aoep = nt->OptionalHeader.AddressOfEntryPoint;
 547     if (aoep && (aoep < lowest_va))
 548         FIXME("VIRUS WARNING: '%s' has an invalid entrypoint (0x%08lx) "
 549                       "below the first virtual address (0x%08x) "
 550                       "(possibly infected by Tchernobyl/SpaceFiller virus)!\n",
 551                        filename, aoep, lowest_va );
 552
 553
 554     /* FIXME:  Hack!  While we don't really support shared sections yet,
 555      *         this checks for those special cases where the whole DLL
 556      *         consists only of shared sections and is mapped into the
 557      *         shared address space > 2GB.  In this case, we assume that
 558      *         the module got mapped at its base address. Thus we simply
 559      *         check whether the module has actually been mapped there
 560      *         and use it, if so.  This is needed to get Win95 USER32.DLL
 561      *         to work (until we support shared sections properly).
 562      */
 563
 564     if ( nt->OptionalHeader.ImageBase & 0x80000000 )
 565     {
 566         HMODULE sharedMod = (HMODULE)nt->OptionalHeader.ImageBase;
 567         IMAGE_NT_HEADERS *sharedNt = (PIMAGE_NT_HEADERS)
 568                ( (LPBYTE)sharedMod + ((LPBYTE)nt - (LPBYTE)hModule) );
 569
 570         /* Well, this check is not really comprehensive,
 571            but should be good enough for now ... */
 572         if (    !IsBadReadPtr( (LPBYTE)sharedMod, sizeof(IMAGE_DOS_HEADER) )
 573              && memcmp( (LPBYTE)sharedMod, (LPBYTE)hModule, sizeof(IMAGE_DOS_HEADER) ) == 0
 574              && !IsBadReadPtr( sharedNt, sizeof(IMAGE_NT_HEADERS) )
 575              && memcmp( sharedNt, nt, sizeof(IMAGE_NT_HEADERS) ) == 0 )
 576         {
 577             UnmapViewOfFile( (LPVOID)hModule );
 578             return sharedMod;
 579         }
 580     }
 581
 582
 583
 584     load_addr = nt->OptionalHeader.ImageBase;
 585     vma_size = calc_vma_size( hModule );
 586
 587     load_addr = (DWORD)VirtualAlloc( (void*)load_addr, vma_size,
 588                                      MEM_RESERVE | MEM_COMMIT,
 589                                      PAGE_EXECUTE_READWRITE );
 590     if (load_addr == 0)
 591     {
 592
 593         FIXME("We need to perform base relocations for %s\n", filename);
 594         dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_BASERELOC;
 595         if (dir->Size)
 596             reloc = dir->VirtualAddress;
 597         else
 598         {
 599             FIXME( "FATAL: Need to relocate %s, but no relocation records present (%s). Try to run that file directly !\n",
 600                    filename,
 601                    (nt->FileHeader.Characteristics&IMAGE_FILE_RELOCS_STRIPPED)?
 602                    "stripped during link" : "unknown reason" );
 603             goto error;
 604         }
 605
 606         /* FIXME: If we need to relocate a system DLL (base > 2GB) we should
 607          *        really make sure that the *new* base address is also > 2GB.
 608          *        Some DLLs really check the MSB of the module handle :-/
 609          */
 610         if ( nt->OptionalHeader.ImageBase & 0x80000000 )
 611             ERR( "Forced to relocate system DLL (base > 2GB). This is not good.\n" );
 612
 613         load_addr = (DWORD)VirtualAlloc( NULL, vma_size,
 614                                          MEM_RESERVE | MEM_COMMIT,
 615                                          PAGE_EXECUTE_READWRITE );
 616         if (!load_addr) {
 617             FIXME_(win32)(
 618                    "FATAL: Couldn't load module %s (out of memory, %d needed)!\n", filename, vma_size);
 619             goto error;
 620         }
 621     }
 622
 623     TRACE("Load addr is %lx (base %lx), range %x\n",
 624           load_addr, nt->OptionalHeader.ImageBase, vma_size );
 625     TRACE_(segment)("Loading %s at %lx, range %x\n",
 626                     filename, load_addr, vma_size );
 627
 628 #if 0
 629
 630     *(PIMAGE_DOS_HEADER)load_addr = *(PIMAGE_DOS_HEADER)hModule;
 631     *PE_HEADER( load_addr ) = *nt;
 632     memcpy( PE_SECTIONS(load_addr), PE_SECTIONS(hModule),
 633             sizeof(IMAGE_SECTION_HEADER) * nt->FileHeader.NumberOfSections );
 634
 635
 636     memcpy( load_addr, hModule, lowest_fa );
 637 #endif
 638
 639     if ((void*)FILE_dommap( handle, (void *)load_addr, 0, nt->OptionalHeader.SizeOfHeaders,
 640                      0, 0, PROT_EXEC | PROT_WRITE | PROT_READ,
 641                      MAP_PRIVATE | MAP_FIXED ) != (void*)load_addr)
 642     {
 643         ERR_(win32)( "Critical Error: failed to map PE header to necessary address.\n");
 644         goto error;
 645     }
 646
 647
 648     pe_sec = PE_SECTIONS( hModule );
 649     for (i = 0; i < nt->FileHeader.NumberOfSections; i++, pe_sec++)
 650     {
 651         if (!pe_sec->SizeOfRawData || !pe_sec->PointerToRawData) continue;
 652         TRACE("%s: mmaping section %s at %p off %lx size %lx/%lx\n",
 653               filename, pe_sec->Name, (void*)RVA(pe_sec->VirtualAddress),
 654               pe_sec->PointerToRawData, pe_sec->SizeOfRawData, pe_sec->Misc.VirtualSize );
 655         if ((void*)FILE_dommap( unix_handle, (void*)RVA(pe_sec->VirtualAddress),
 656                          0, pe_sec->SizeOfRawData, 0, pe_sec->PointerToRawData,
 657                          PROT_EXEC | PROT_WRITE | PROT_READ,
 658                          MAP_PRIVATE | MAP_FIXED ) != (void*)RVA(pe_sec->VirtualAddress))
 659         {
 660
 661             ERR_(win32)( "Critical Error: failed to map PE section to necessary address.\n");
 662             goto error;
 663         }
 664         if ((pe_sec->SizeOfRawData < pe_sec->Misc.VirtualSize) &&
 665             (pe_sec->SizeOfRawData & (page_size-1)))
 666         {
 667             DWORD end = (pe_sec->SizeOfRawData & ~(page_size-1)) + page_size;
 668             if (end > pe_sec->Misc.VirtualSize) end = pe_sec->Misc.VirtualSize;
 669             TRACE("clearing %p - %p\n",
 670                   RVA(pe_sec->VirtualAddress) + pe_sec->SizeOfRawData,
 671                   RVA(pe_sec->VirtualAddress) + end );
 672             memset( (char*)RVA(pe_sec->VirtualAddress) + pe_sec->SizeOfRawData, 0,
 673                     end - pe_sec->SizeOfRawData );
 674         }
 675     }
 676
 677
 678     if ( reloc )
 679         do_relocations( load_addr, (IMAGE_BASE_RELOCATION *)RVA(reloc) );
 680
 681
 682     *version =   ( (nt->OptionalHeader.MajorSubsystemVersion & 0xff) << 8 )
 683                |   (nt->OptionalHeader.MinorSubsystemVersion & 0xff);
 684
 685
 686     UnmapViewOfFile( (LPVOID)hModule );
 687     return (HMODULE)load_addr;
 688
 689 error:
 690     if (unix_handle != -1) close( unix_handle );
 691     if (load_addr)
 692     VirtualFree( (LPVOID)load_addr, 0, MEM_RELEASE );
 693     UnmapViewOfFile( (LPVOID)hModule );
 694     return 0;
 695 }
 696
 697 /**********************************************************************
 698  *                 PE_CreateModule
 699  *
 700  * Create WINE_MODREF structure for loaded HMODULE32, link it into
 701  * process modref_list, and fixup all imports.
 702  *
 703  * Note: hModule must point to a correctly allocated PE image,
 704  *       with base relocations applied; the 16-bit dummy module
 705  *       associated to hModule must already exist.
 706  *
 707  * Note: This routine must always be called in the context of the
 708  *       process that is to own the module to be created.
 709  */
 710 WINE_MODREF *PE_CreateModule( HMODULE hModule,
 711                               LPCSTR filename, DWORD flags, WIN_BOOL builtin )
 712 {
 713     DWORD load_addr = (DWORD)hModule;
 714     IMAGE_NT_HEADERS *nt = PE_HEADER(hModule);
 715     IMAGE_DATA_DIRECTORY *dir;
 716     IMAGE_IMPORT_DESCRIPTOR *pe_import = NULL;
 717     IMAGE_EXPORT_DIRECTORY *pe_export = NULL;
 718     IMAGE_RESOURCE_DIRECTORY *pe_resource = NULL;
 719     WINE_MODREF *wm;
 720     int result;
 721
 722
 723
 724
 725     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_EXPORT;
 726     if (dir->Size)
 727         pe_export = (PIMAGE_EXPORT_DIRECTORY)RVA(dir->VirtualAddress);
 728
 729     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_IMPORT;
 730     if (dir->Size)
 731         pe_import = (PIMAGE_IMPORT_DESCRIPTOR)RVA(dir->VirtualAddress);
 732
 733     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_RESOURCE;
 734     if (dir->Size)
 735         pe_resource = (PIMAGE_RESOURCE_DIRECTORY)RVA(dir->VirtualAddress);
 736
 737     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_EXCEPTION;
 738     if (dir->Size) FIXME("Exception directory ignored\n" );
 739
 740     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_SECURITY;
 741     if (dir->Size) FIXME("Security directory ignored\n" );
 742
 743
 744
 745
 746     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_DEBUG;
 747     if (dir->Size) TRACE("Debug directory ignored\n" );
 748
 749     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_COPYRIGHT;
 750     if (dir->Size) FIXME("Copyright string ignored\n" );
 751
 752     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_GLOBALPTR;
 753     if (dir->Size) FIXME("Global Pointer (MIPS) ignored\n" );
 754
 755
 756
 757     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG;
 758     if (dir->Size) FIXME("Load Configuration directory ignored\n" );
 759
 760     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT;
 761     if (dir->Size) TRACE("Bound Import directory ignored\n" );
 762
 763     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_IAT;
 764     if (dir->Size) TRACE("Import Address Table directory ignored\n" );
 765
 766     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_DELAY_IMPORT;
 767     if (dir->Size)
 768     {
 769                 TRACE("Delayed import, stub calls LoadLibrary\n" );
 770                 /*
 771                  * Nothing to do here.
 772                  */
 773
 774 #ifdef ImgDelayDescr
 775                 /*
 776                  * This code is useful to observe what the heck is going on.
 777                  */
 778                 {
 779                 ImgDelayDescr *pe_delay = NULL;
 780         pe_delay = (PImgDelayDescr)RVA(dir->VirtualAddress);
 781         TRACE_(delayhlp)("pe_delay->grAttrs = %08x\n", pe_delay->grAttrs);
 782         TRACE_(delayhlp)("pe_delay->szName = %s\n", pe_delay->szName);
 783         TRACE_(delayhlp)("pe_delay->phmod = %08x\n", pe_delay->phmod);
 784         TRACE_(delayhlp)("pe_delay->pIAT = %08x\n", pe_delay->pIAT);
 785         TRACE_(delayhlp)("pe_delay->pINT = %08x\n", pe_delay->pINT);
 786         TRACE_(delayhlp)("pe_delay->pBoundIAT = %08x\n", pe_delay->pBoundIAT);
 787         TRACE_(delayhlp)("pe_delay->pUnloadIAT = %08x\n", pe_delay->pUnloadIAT);
 788         TRACE_(delayhlp)("pe_delay->dwTimeStamp = %08x\n", pe_delay->dwTimeStamp);
 789         }
 790 #endif
 791         }
 792
 793     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR;
 794     if (dir->Size) FIXME("Unknown directory 14 ignored\n" );
 795
 796     dir = nt->OptionalHeader.DataDirectory+15;
 797     if (dir->Size) FIXME("Unknown directory 15 ignored\n" );
 798
 799
 800
 801
 802     wm = (WINE_MODREF *)HeapAlloc( GetProcessHeap(),
 803                                    HEAP_ZERO_MEMORY, sizeof(*wm) );
 804     wm->module = hModule;
 805
 806     if ( builtin )
 807         wm->flags |= WINE_MODREF_INTERNAL;
 808     if ( flags & DONT_RESOLVE_DLL_REFERENCES )
 809         wm->flags |= WINE_MODREF_DONT_RESOLVE_REFS;
 810     if ( flags & LOAD_LIBRARY_AS_DATAFILE )
 811         wm->flags |= WINE_MODREF_LOAD_AS_DATAFILE;
 812
 813     wm->type = MODULE32_PE;
 814     wm->binfmt.pe.pe_export = pe_export;
 815     wm->binfmt.pe.pe_import = pe_import;
 816     wm->binfmt.pe.pe_resource = pe_resource;
 817     wm->binfmt.pe.tlsindex = -1;
 818
 819     wm->filename = malloc(strlen(filename)+1);
 820     strcpy(wm->filename, filename );
 821     wm->modname = strrchr( wm->filename, '\\' );
 822     if (!wm->modname) wm->modname = wm->filename;
 823     else wm->modname++;
 824
 825     if ( pe_export )
 826         dump_exports( hModule );
 827
 828     /* Fixup Imports */
 829
 830     if (    pe_import
 831          && !( wm->flags & WINE_MODREF_LOAD_AS_DATAFILE )
 832          && !( wm->flags & WINE_MODREF_DONT_RESOLVE_REFS )
 833          && fixup_imports( wm ) )
 834     {
 835         /* remove entry from modref chain */
 836          return NULL;
 837     }
 838
 839     return wm;
 840
 841     return wm;
 842 }
 843
 844 /******************************************************************************
 845  * The PE Library Loader frontend.
 846  * FIXME: handle the flags.
 847  */
 848 WINE_MODREF *PE_LoadLibraryExA (LPCSTR name, DWORD flags)
 849 {
 850         HMODULE         hModule32;
 851         WINE_MODREF     *wm;
 852         char            filename[256];
 853         int hFile;
 854         WORD            version = 0;
 855
 856
 857         strncpy(filename, name, sizeof(filename));
 858         hFile=open(filename, O_RDONLY);
 859         if(hFile==-1)
 860             return NULL;
 861
 862
 863         hModule32 = PE_LoadImage( hFile, filename, &version );
 864         if (!hModule32)
 865         {
 866                 SetLastError( ERROR_OUTOFMEMORY );
 867                 return NULL;
 868         }
 869
 870         if ( !(wm = PE_CreateModule( hModule32, filename, flags, FALSE )) )
 871         {
 872                 ERR( "can't load %s\n", filename );
 873                 SetLastError( ERROR_OUTOFMEMORY );
 874                 return NULL;
 875         }
 876         close(hFile);
 877         //printf("^^^^^^^^^^^^^^^^Alloc VM1  %p\n", wm);
 878         return wm;
 879 }
 880
 881
 882 /*****************************************************************************
 883  *      PE_UnloadLibrary
 884  *
 885  * Unload the library unmapping the image and freeing the modref structure.
 886  */
 887 void PE_UnloadLibrary(WINE_MODREF *wm)
 888 {
 889     TRACE(" unloading %s\n", wm->filename);
 890
 891     if (wm->filename)
 892         free(wm->filename);
 893     if (wm->short_filename)
 894         free(wm->short_filename);
 895     HeapFree( GetProcessHeap(), 0, wm->deps );
 896     VirtualFree( (LPVOID)wm->module, 0, MEM_RELEASE );
 897     HeapFree( GetProcessHeap(), 0, wm );
 898     //printf("^^^^^^^^^^^^^^^^Free VM1  %p\n", wm);
 899 }
 900
 901 /*****************************************************************************
 902  * Load the PE main .EXE. All other loading is done by PE_LoadLibraryExA
 903  * FIXME: this function should use PE_LoadLibraryExA, but currently can't
 904  * due to the PROCESS_Create stuff.
 905  */
 906
 907
 908 /*
 909  * This is a dirty hack.
 910  * The win32 DLLs contain an alloca routine, that first probes the soon
 911  * to be allocated new memory *below* the current stack pointer in 4KByte
 912  * increments.  After the mem probing below the current %esp,  the stack
 913  * pointer is finally decremented to make room for the "alloca"ed memory.
 914  * Maybe the probing code is intended to extend the stack on a windows box.
 915  * Anyway, the linux kernel does *not* extend the stack by simply accessing
 916  * memory below %esp;  it segfaults.
 917  * The extend_stack_for_dll_alloca() routine just preallocates a big chunk
 918  * of memory on the stack, for use by the DLLs alloca routine.
 919  * Added the noinline attribute as e.g. gcc 3.2.2 inlines this function
 920  * in a way that breaks it.
 921  */
 922 static void __attribute__((noinline)) extend_stack_for_dll_alloca(void)
 923 {
 924 #if !defined(__FreeBSD__) && !defined(__DragonFly__)
 925     volatile int* mem=alloca(0x20000);
 926     *mem=0x1234;
 927 #endif
 928 }
 929
 930 /* Called if the library is loaded or freed.
 931  * NOTE: if a thread attaches a DLL, the current thread will only do
 932  * DLL_PROCESS_ATTACH. Only new created threads do DLL_THREAD_ATTACH
 933  * (SDK)
 934  */
 935 WIN_BOOL PE_InitDLL( WINE_MODREF *wm, DWORD type, LPVOID lpReserved )
 936 {
 937     WIN_BOOL retv = TRUE;
 938     assert( wm->type == MODULE32_PE );
 939
 940
 941     if ((PE_HEADER(wm->module)->FileHeader.Characteristics & IMAGE_FILE_DLL) &&
 942         (PE_HEADER(wm->module)->OptionalHeader.AddressOfEntryPoint)
 943     ) {
 944         DLLENTRYPROC entry ;
 945         entry = (void*)PE_FindExportedFunction(wm, "DllMain", 0);
 946         if(entry==NULL)
 947             entry = (void*)RVA_PTR( wm->module,OptionalHeader.AddressOfEntryPoint );
 948
 949         TRACE_(relay)("CallTo32(entryproc=%p,module=%08x,type=%ld,res=%p)\n",
 950                        entry, wm->module, type, lpReserved );
 951
 952
 953         TRACE("Entering DllMain(");
 954         switch(type)
 955         {
 956             case DLL_PROCESS_DETACH:
 957                 TRACE("DLL_PROCESS_DETACH) ");
 958                 break;
 959             case DLL_PROCESS_ATTACH:
 960                 TRACE("DLL_PROCESS_ATTACH) ");
 961                 break;
 962             case DLL_THREAD_DETACH:
 963                 TRACE("DLL_THREAD_DETACH) ");
 964                 break;
 965             case DLL_THREAD_ATTACH:
 966                 TRACE("DLL_THREAD_ATTACH) ");
 967                 break;
 968         }
 969         TRACE("for %s\n", wm->filename);
 970         extend_stack_for_dll_alloca();
 971         retv = entry( wm->module, type, lpReserved );
 972     }
 973
 974     return retv;
 975 }
 976
 977 static LPVOID
 978 _fixup_address(PIMAGE_OPTIONAL_HEADER opt,int delta,LPVOID addr) {
 979         if (    ((DWORD)addr>opt->ImageBase) &&
 980                 ((DWORD)addr<opt->ImageBase+opt->SizeOfImage)
 981         )
 982
 983                 return (LPVOID)(((DWORD)addr)+delta);
 984         else
 985
 986                 return addr;
 987 }