ntoskrnl/ldr/loader.c

   1 /* $Id$
   2  *
   3  * COPYRIGHT:       See COPYING in the top level directory
   4  * PROJECT:         ReactOS kernel
   5  * FILE:            ntoskrnl/ldr/loader.c
   6  * PURPOSE:         Loaders for PE executables
   7  * PROGRAMMERS:     Jean Michault
   8  *                  Rex Jolliff (rex@lvcablemodem.com)
   9  *                  Jason Filby (jasonfilby@yahoo.com)
  10  *                  Casper S. Hornstrup (chorns@users.sourceforge.net)
  11  * UPDATE HISTORY:
  12  *   DW   22/05/98   Created
  13  *   RJJ  10/12/98   Completed image loader function and added hooks for MZ/PE
  14  *   RJJ  10/12/98   Built driver loader function and added hooks for PE/COFF
  15  *   RJJ  10/12/98   Rolled in David's code to load COFF drivers
  16  *   JM   14/12/98   Built initial PE user module loader
  17  *   RJJ  06/03/99   Moved user PE loader into NTDLL
  18  *   JF   26/01/2000 Recoded some parts to retrieve export details correctly
  19  *   DW   27/06/2000 Removed redundant header files
  20  *   CSH  11/04/2001 Added automatic loading of module symbols if they exist
  21  *   KJK  02/04/2003 Nebbet-ized a couple of type names
  22  */
  23
  24
  25 /* INCLUDES *****************************************************************/
  26
  27 #include <limits.h>
  28 #include <ddk/ntddk.h>
  29 #include <roscfg.h>
  30 #include <internal/module.h>
  31 #include <internal/ntoskrnl.h>
  32 #include <internal/kd.h>
  33 #include <internal/io.h>
  34 #include <internal/mm.h>
  35 #include <internal/ps.h>
  36 #include <internal/ldr.h>
  37 #include <internal/pool.h>
  38 #include <internal/kd.h>
  39 #include <ntos/minmax.h>
  40
  41 #ifdef HALDBG
  42 #include <internal/ntosdbg.h>
  43 #else
  44 #define ps(args...)
  45 #endif
  46
  47 #define NDEBUG
  48 #include <internal/debug.h>
  49
  50 /* GLOBALS *******************************************************************/
  51
  52 LIST_ENTRY ModuleListHead;
  53 KSPIN_LOCK ModuleListLock;
  54
  55 LIST_ENTRY ModuleTextListHead;
  56 #ifndef LIBCAPTIVE
  57 STATIC MODULE_TEXT_SECTION NtoskrnlTextSection;
  58 STATIC MODULE_TEXT_SECTION LdrHalTextSection;
  59 #endif /* LIBCAPTIVE */
  60 ULONG_PTR LdrHalBase;
  61
  62 #define TAG_DRIVER_MEM  TAG('D', 'R', 'V', 'M')
  63
  64 /* FORWARD DECLARATIONS ******************************************************/
  65
  66 NTSTATUS
  67 LdrProcessModule(PVOID ModuleLoadBase,
  68                  PUNICODE_STRING ModuleName,
  69                  PMODULE_OBJECT *ModuleObject);
  70
  71 PVOID
  72 LdrGetExportAddress(PMODULE_OBJECT ModuleObject,
  73                     char *Name,
  74                     unsigned short Hint);
  75
  76 #ifndef LIBCAPTIVE
  77 static
  78 #endif /* LIBCAPTIVE */
  79 VOID
  80 LdrpBuildModuleBaseName(PUNICODE_STRING BaseName,
  81                         PUNICODE_STRING FullName);
  82
  83 static LONG
  84 LdrpCompareModuleNames(IN PUNICODE_STRING String1,
  85                        IN PUNICODE_STRING String2);
  86
  87
  88 /*  PE Driver load support  */
  89 static NTSTATUS LdrPEProcessModule(PVOID ModuleLoadBase,
  90                                    PUNICODE_STRING FileName,
  91                                    PMODULE_OBJECT *ModuleObject);
  92 static PVOID
  93 LdrPEGetExportAddress(PMODULE_OBJECT ModuleObject,
  94                       PCHAR Name,
  95                       USHORT Hint);
  96
  97 #ifndef LIBCAPTIVE
  98 static PVOID
  99 LdrSafePEGetExportAddress(PVOID ImportModuleBase,
 100                           PCHAR Name,
 101                           USHORT Hint);
 102 #endif /* LIBCAPTIVE */
 103
 104 static PVOID
 105 LdrPEFixupForward(PCHAR ForwardName);
 106
 107
 108 /* FUNCTIONS *****************************************************************/
 109
 110 #ifndef LIBCAPTIVE
 111
 112 VOID
 113 LdrInitDebug(PLOADER_MODULE Module, PWCH Name)
 114 {
 115   PLIST_ENTRY current_entry;
 116   MODULE_TEXT_SECTION* current;
 117
 118   current_entry = ModuleTextListHead.Flink;
 119   while (current_entry != &ModuleTextListHead)
 120     {
 121       current =
 122         CONTAINING_RECORD(current_entry, MODULE_TEXT_SECTION, ListEntry);
 123       if (wcscmp(current->Name, Name) == 0)
 124         {
 125           break;
 126         }
 127       current_entry = current_entry->Flink;
 128     }
 129
 130   if (current_entry == &ModuleTextListHead)
 131     {
 132       return;
 133     }
 134 }
 135
 136 VOID
 137 LdrInit1(VOID)
 138 {
 139   PIMAGE_DOS_HEADER DosHeader;
 140   PIMAGE_FILE_HEADER FileHeader;
 141   PIMAGE_OPTIONAL_HEADER OptionalHeader;
 142   PIMAGE_SECTION_HEADER SectionList;
 143
 144   InitializeListHead(&ModuleTextListHead);
 145
 146   /* Setup ntoskrnl.exe text section */
 147   DosHeader = (PIMAGE_DOS_HEADER) KERNEL_BASE;
 148   FileHeader =
 149     (PIMAGE_FILE_HEADER) ((DWORD)KERNEL_BASE +
 150                           DosHeader->e_lfanew + sizeof(ULONG));
 151   OptionalHeader = (PIMAGE_OPTIONAL_HEADER)
 152     ((DWORD)FileHeader + sizeof(IMAGE_FILE_HEADER));
 153   SectionList = (PIMAGE_SECTION_HEADER)
 154     ((DWORD)OptionalHeader + sizeof(IMAGE_OPTIONAL_HEADER));
 155   NtoskrnlTextSection.Base = KERNEL_BASE;
 156   NtoskrnlTextSection.Length = SectionList[0].Misc.VirtualSize +
 157     SectionList[0].VirtualAddress;
 158   NtoskrnlTextSection.Name = KERNEL_MODULE_NAME;
 159   NtoskrnlTextSection.OptionalHeader = OptionalHeader;
 160   InsertTailList(&ModuleTextListHead, &NtoskrnlTextSection.ListEntry);
 161
 162   /* Setup hal.dll text section */
 163   DosHeader = (PIMAGE_DOS_HEADER)LdrHalBase;
 164   FileHeader =
 165     (PIMAGE_FILE_HEADER) ((DWORD)LdrHalBase +
 166                           DosHeader->e_lfanew + sizeof(ULONG));
 167   OptionalHeader = (PIMAGE_OPTIONAL_HEADER)
 168     ((DWORD)FileHeader + sizeof(IMAGE_FILE_HEADER));
 169   SectionList = (PIMAGE_SECTION_HEADER)
 170     ((DWORD)OptionalHeader + sizeof(IMAGE_OPTIONAL_HEADER));
 171   LdrHalTextSection.Base = LdrHalBase;
 172   LdrHalTextSection.Length = SectionList[0].Misc.VirtualSize +
 173     SectionList[0].VirtualAddress;
 174   LdrHalTextSection.Name = HAL_MODULE_NAME;
 175   LdrHalTextSection.OptionalHeader = OptionalHeader;
 176   InsertTailList(&ModuleTextListHead, &LdrHalTextSection.ListEntry);
 177
 178   /* Hook for KDB on initialization of the loader. */
 179   KDB_LOADERINIT_HOOK(&NtoskrnlTextSection, &LdrHalTextSection);
 180 }
 181
 182
 183 VOID
 184 LdrInitModuleManagement(VOID)
 185 {
 186   PIMAGE_DOS_HEADER DosHeader;
 187   PMODULE_OBJECT ModuleObject;
 188
 189   /* Initialize the module list and spinlock */
 190   InitializeListHead(&ModuleListHead);
 191   KeInitializeSpinLock(&ModuleListLock);
 192
 193   /* Create module object for NTOSKRNL */
 194   ModuleObject = ExAllocatePool(NonPagedPool, sizeof(MODULE_OBJECT));
 195   assert(ModuleObject != NULL);
 196   RtlZeroMemory(ModuleObject, sizeof(MODULE_OBJECT));
 197
 198   /* Initialize ModuleObject data */
 199   ModuleObject->Base = (PVOID) KERNEL_BASE;
 200   ModuleObject->Flags = MODULE_FLAG_PE;
 201   RtlCreateUnicodeString(&ModuleObject->FullName,
 202                          KERNEL_MODULE_NAME);
 203   LdrpBuildModuleBaseName(&ModuleObject->BaseName,
 204                           &ModuleObject->FullName);
 205
 206   DosHeader = (PIMAGE_DOS_HEADER) KERNEL_BASE;
 207   ModuleObject->Image.PE.FileHeader =
 208     (PIMAGE_FILE_HEADER) ((DWORD) ModuleObject->Base +
 209     DosHeader->e_lfanew + sizeof(ULONG));
 210   ModuleObject->Image.PE.OptionalHeader = (PIMAGE_OPTIONAL_HEADER)
 211     ((DWORD)ModuleObject->Image.PE.FileHeader + sizeof(IMAGE_FILE_HEADER));
 212   ModuleObject->Image.PE.SectionList = (PIMAGE_SECTION_HEADER)
 213     ((DWORD)ModuleObject->Image.PE.OptionalHeader + sizeof(IMAGE_OPTIONAL_HEADER));
 214   ModuleObject->EntryPoint = (PVOID) ((DWORD) ModuleObject->Base +
 215     ModuleObject->Image.PE.OptionalHeader->AddressOfEntryPoint);
 216   DPRINT("ModuleObject:%08x  entrypoint at %x\n", ModuleObject, ModuleObject->EntryPoint);
 217   ModuleObject->Length = ModuleObject->Image.PE.OptionalHeader->SizeOfImage;
 218   ModuleObject->TextSection = &NtoskrnlTextSection;
 219
 220   InsertTailList(&ModuleListHead,
 221                  &ModuleObject->ListEntry);
 222
 223   /* Create module object for HAL */
 224   ModuleObject = ExAllocatePool(NonPagedPool, sizeof(MODULE_OBJECT));
 225   assert(ModuleObject != NULL);
 226   RtlZeroMemory(ModuleObject, sizeof(MODULE_OBJECT));
 227
 228   /* Initialize ModuleObject data */
 229   ModuleObject->Base = (PVOID) LdrHalBase;
 230   ModuleObject->Flags = MODULE_FLAG_PE;
 231
 232   RtlCreateUnicodeString(&ModuleObject->FullName,
 233                          HAL_MODULE_NAME);
 234   LdrpBuildModuleBaseName(&ModuleObject->BaseName,
 235                           &ModuleObject->FullName);
 236
 237   DosHeader = (PIMAGE_DOS_HEADER) LdrHalBase;
 238   ModuleObject->Image.PE.FileHeader =
 239     (PIMAGE_FILE_HEADER) ((DWORD) ModuleObject->Base +
 240     DosHeader->e_lfanew + sizeof(ULONG));
 241   ModuleObject->Image.PE.OptionalHeader = (PIMAGE_OPTIONAL_HEADER)
 242     ((DWORD)ModuleObject->Image.PE.FileHeader + sizeof(IMAGE_FILE_HEADER));
 243   ModuleObject->Image.PE.SectionList = (PIMAGE_SECTION_HEADER)
 244     ((DWORD)ModuleObject->Image.PE.OptionalHeader + sizeof(IMAGE_OPTIONAL_HEADER));
 245   ModuleObject->EntryPoint = (PVOID) ((DWORD) ModuleObject->Base +
 246     ModuleObject->Image.PE.OptionalHeader->AddressOfEntryPoint);
 247   DPRINT("ModuleObject:%08x  entrypoint at %x\n", ModuleObject, ModuleObject->EntryPoint);
 248   ModuleObject->Length = ModuleObject->Image.PE.OptionalHeader->SizeOfImage;
 249   ModuleObject->TextSection = &LdrHalTextSection;
 250
 251   InsertTailList(&ModuleListHead,
 252                  &ModuleObject->ListEntry);
 253 }
 254
 255 NTSTATUS
 256 LdrpLoadImage(PUNICODE_STRING DriverName,
 257               PVOID *ModuleBase,
 258               PVOID *SectionPointer,
 259               PVOID *EntryPoint,
 260               PVOID *ExportSectionPointer)
 261 {
 262   PMODULE_OBJECT ModuleObject;
 263   NTSTATUS Status;
 264
 265   ModuleObject = LdrGetModuleObject(DriverName);
 266   if (ModuleObject == NULL)
 267     {
 268       Status = LdrLoadModule(DriverName, &ModuleObject);
 269       if (!NT_SUCCESS(Status))
 270         {
 271           return(Status);
 272         }
 273     }
 274
 275   if (ModuleBase)
 276     *ModuleBase = ModuleObject->Base;
 277
 278 //  if (SectionPointer)
 279 //    *SectionPointer = ModuleObject->
 280
 281   if (EntryPoint)
 282     *EntryPoint = ModuleObject->EntryPoint;
 283
 284 //  if (ExportSectionPointer)
 285 //    *ExportSectionPointer = ModuleObject->
 286
 287   return(STATUS_SUCCESS);
 288 }
 289
 290
 291 NTSTATUS
 292 LdrpUnloadImage(PVOID ModuleBase)
 293 {
 294   return(STATUS_NOT_IMPLEMENTED);
 295 }
 296
 297
 298 NTSTATUS
 299 LdrpLoadAndCallImage(PUNICODE_STRING ModuleName)
 300 {
 301   PDRIVER_INITIALIZE DriverEntry;
 302   PMODULE_OBJECT ModuleObject;
 303   NTSTATUS Status;
 304
 305   ModuleObject = LdrGetModuleObject(ModuleName);
 306   if (ModuleObject != NULL)
 307     {
 308       return(STATUS_IMAGE_ALREADY_LOADED);
 309     }
 310
 311   Status = LdrLoadModule(ModuleName, &ModuleObject);
 312   if (!NT_SUCCESS(Status))
 313     {
 314       return(Status);
 315     }
 316
 317   DriverEntry = (PDRIVER_INITIALIZE)ModuleObject->EntryPoint;
 318
 319   Status = DriverEntry(NULL, NULL);
 320   if (!NT_SUCCESS(Status))
 321     {
 322       LdrUnloadModule(ModuleObject);
 323     }
 324
 325   return(Status);
 326 }
 327
 328
 329 NTSTATUS
 330 LdrLoadModule(PUNICODE_STRING Filename,
 331               PMODULE_OBJECT *ModuleObject)
 332 {
 333   PVOID ModuleLoadBase;
 334   NTSTATUS Status;
 335   HANDLE FileHandle;
 336   OBJECT_ATTRIBUTES ObjectAttributes;
 337   PMODULE_OBJECT Module;
 338   FILE_STANDARD_INFORMATION FileStdInfo;
 339   IO_STATUS_BLOCK IoStatusBlock;
 340
 341   *ModuleObject = NULL;
 342
 343   DPRINT("Loading Module %wZ...\n", Filename);
 344
 345   /*  Open the Module  */
 346   InitializeObjectAttributes(&ObjectAttributes,
 347                              Filename,
 348                              0,
 349                              NULL,
 350                              NULL);
 351   CHECKPOINT;
 352   Status = NtOpenFile(&FileHandle,
 353                       FILE_ALL_ACCESS,
 354                       &ObjectAttributes,
 355                       &IoStatusBlock,
 356                       0,
 357                       FILE_SYNCHRONOUS_IO_NONALERT);
 358   CHECKPOINT;
 359   if (!NT_SUCCESS(Status))
 360     {
 361       CPRINT("Could not open module file: %wZ\n", Filename);
 362       return(Status);
 363     }
 364   CHECKPOINT;
 365
 366   /*  Get the size of the file  */
 367   Status = NtQueryInformationFile(FileHandle,
 368                                   &IoStatusBlock,
 369                                   &FileStdInfo,
 370                                   sizeof(FileStdInfo),
 371                                   FileStandardInformation);
 372   if (!NT_SUCCESS(Status))
 373     {
 374       CPRINT("Could not get file size\n");
 375       NtClose(FileHandle);
 376       return(Status);
 377     }
 378   CHECKPOINT;
 379
 380   /*  Allocate nonpageable memory for driver  */
 381   ModuleLoadBase = ExAllocatePoolWithTag(NonPagedPool,
 382                                          FileStdInfo.EndOfFile.u.LowPart,
 383                                          TAG_DRIVER_MEM);
 384   if (ModuleLoadBase == NULL)
 385     {
 386       CPRINT("Could not allocate memory for module");
 387       NtClose(FileHandle);
 388       return(STATUS_INSUFFICIENT_RESOURCES);
 389     }
 390   CHECKPOINT;
 391
 392   /*  Load driver into memory chunk  */
 393   Status = NtReadFile(FileHandle,
 394                       0, 0, 0,
 395                       &IoStatusBlock,
 396                       ModuleLoadBase,
 397                       FileStdInfo.EndOfFile.u.LowPart,
 398                       0, 0);
 399   if (!NT_SUCCESS(Status))
 400     {
 401       CPRINT("Could not read module file into memory");
 402       ExFreePool(ModuleLoadBase);
 403       NtClose(FileHandle);
 404       return(Status);
 405     }
 406   CHECKPOINT;
 407
 408   NtClose(FileHandle);
 409
 410   Status = LdrProcessModule(ModuleLoadBase,
 411                             Filename,
 412                             &Module);
 413   if (!NT_SUCCESS(Status))
 414     {
 415       CPRINT("Could not process module");
 416       ExFreePool(ModuleLoadBase);
 417       return(Status);
 418     }
 419
 420   /*  Cleanup  */
 421   ExFreePool(ModuleLoadBase);
 422
 423   *ModuleObject = Module;
 424
 425   /* Hook for KDB on loading a driver. */
 426   KDB_LOADDRIVER_HOOK(Filename, Module);
 427
 428   return(STATUS_SUCCESS);
 429 }
 430
 431 #endif /* LIBCAPTIVE */
 432
 433 NTSTATUS
 434 LdrUnloadModule(PMODULE_OBJECT ModuleObject)
 435 {
 436   KIRQL Irql;
 437
 438   /* Remove the module from the module list */
 439   KeAcquireSpinLock(&ModuleListLock,&Irql);
 440   RemoveEntryList(&ModuleObject->ListEntry);
 441   KeReleaseSpinLock(&ModuleListLock, Irql);
 442
 443   /* Hook for KDB on unloading a driver. */
 444   KDB_UNLOADDRIVER_HOOK(ModuleObject);
 445
 446   /* Free text section */
 447   if (ModuleObject->TextSection != NULL)
 448     {
 449       ExFreePool(ModuleObject->TextSection->Name);
 450       RemoveEntryList(&ModuleObject->TextSection->ListEntry);
 451       ExFreePool(ModuleObject->TextSection);
 452       ModuleObject->TextSection = NULL;
 453     }
 454
 455   /* Free module section */
 456 //  MmFreeSection(ModuleObject->Base);
 457
 458   ExFreePool(ModuleObject);
 459
 460   return(STATUS_SUCCESS);
 461 }
 462
 463 #ifndef LIBCAPTIVE
 464
 465 NTSTATUS
 466 LdrInitializeBootStartDriver(PVOID ModuleLoadBase,
 467                              PCHAR FileName,
 468                              ULONG ModuleLength)
 469 {
 470   PMODULE_OBJECT ModuleObject;
 471   UNICODE_STRING ModuleName;
 472   PDEVICE_NODE DeviceNode;
 473   NTSTATUS Status;
 474
 475   WCHAR Buffer[MAX_PATH];
 476   ULONG Length;
 477   LPWSTR Start;
 478   LPWSTR Ext;
 479   PCHAR FileExt;
 480   CHAR TextBuffer [256];
 481   ULONG x, y, cx, cy;
 482
 483   HalQueryDisplayParameters(&x, &y, &cx, &cy);
 484   RtlFillMemory(TextBuffer, x, ' ');
 485   TextBuffer[x] = '\0';
 486   HalSetDisplayParameters(0, y-1);
 487   HalDisplayString(TextBuffer);
 488
 489   sprintf(TextBuffer, "Initializing %s...\n", FileName);
 490   HalSetDisplayParameters(0, y-1);
 491   HalDisplayString(TextBuffer);
 492   HalSetDisplayParameters(cx, cy);
 493
 494   /*  Split the filename into base name and extension  */
 495   FileExt = strrchr(FileName, '.');
 496   if (FileExt != NULL)
 497     Length = FileExt - FileName;
 498   else
 499     Length = strlen(FileName);
 500
 501   if ((FileExt != NULL) && (strcmp(FileExt, ".sym") == 0))
 502     {
 503       KDB_SYMBOLFILE_HOOK(ModuleLoadBase, FileName, Length);
 504       return(STATUS_SUCCESS);
 505     }
 506   else if ((FileExt != NULL) && !(strcmp(FileExt, ".sys") == 0))
 507     {
 508       CPRINT("Ignoring non-driver file %s\n", FileName);
 509       return STATUS_SUCCESS;
 510     }
 511
 512   /* Use IopRootDeviceNode for now */
 513   Status = IopCreateDeviceNode(IopRootDeviceNode, NULL, &DeviceNode);
 514   if (!NT_SUCCESS(Status))
 515     {
 516       CPRINT("Driver load failed, status (%x)\n", Status);
 517       return(Status);
 518     }
 519
 520   RtlCreateUnicodeStringFromAsciiz(&ModuleName,
 521                                    FileName);
 522   Status = LdrProcessModule(ModuleLoadBase,
 523                             &ModuleName,
 524                             &ModuleObject);
 525   RtlFreeUnicodeString(&ModuleName);
 526   if (ModuleObject == NULL)
 527     {
 528       IopFreeDeviceNode(DeviceNode);
 529       CPRINT("Driver load failed, status (%x)\n", Status);
 530       return(STATUS_UNSUCCESSFUL);
 531     }
 532
 533
 534   /* Get the service name from the module name */
 535   Start = wcsrchr(ModuleObject->BaseName.Buffer, L'\\');
 536   if (Start == NULL)
 537     Start = ModuleObject->BaseName.Buffer;
 538   else
 539     Start++;
 540
 541   Ext = wcsrchr(ModuleObject->BaseName.Buffer, L'.');
 542   if (Ext != NULL)
 543     Length = Ext - Start;
 544   else
 545     Length = wcslen(Start);
 546
 547   wcsncpy(Buffer, Start, Length);
 548   Buffer[Length] = 0;
 549   RtlCreateUnicodeString(&DeviceNode->ServiceName, Buffer);
 550
 551   Status = IopInitializeDriver(ModuleObject->EntryPoint,
 552                                DeviceNode, FALSE);
 553   if (!NT_SUCCESS(Status))
 554     {
 555       IopFreeDeviceNode(DeviceNode);
 556       CPRINT("Driver load failed, status (%x)\n", Status);
 557     }
 558
 559   return(Status);
 560 }
 561
 562 #endif /* LIBCAPTIVE */
 563
 564 NTSTATUS
 565 LdrProcessModule(PVOID ModuleLoadBase,
 566                  PUNICODE_STRING ModuleName,
 567                  PMODULE_OBJECT *ModuleObject)
 568 {
 569   PIMAGE_DOS_HEADER PEDosHeader;
 570
 571   /*  If MZ header exists  */
 572   PEDosHeader = (PIMAGE_DOS_HEADER) ModuleLoadBase;
 573   if (PEDosHeader->e_magic == IMAGE_DOS_MAGIC && PEDosHeader->e_lfanew != 0L)
 574     {
 575       return LdrPEProcessModule(ModuleLoadBase,
 576                                 ModuleName,
 577                                 ModuleObject);
 578     }
 579
 580   CPRINT("Module wasn't PE\n");
 581   return STATUS_UNSUCCESSFUL;
 582 }
 583
 584
 585 PVOID
 586 LdrGetExportAddress(PMODULE_OBJECT ModuleObject,
 587                     char *Name,
 588                     unsigned short Hint)
 589 {
 590   if (ModuleObject->Flags & MODULE_FLAG_PE)
 591     {
 592       return LdrPEGetExportAddress(ModuleObject, Name, Hint);
 593     }
 594   else
 595     {
 596       return 0;
 597     }
 598 }
 599
 600 #ifndef LIBCAPTIVE
 601
 602 NTSTATUS
 603 LdrpQueryModuleInformation(PVOID Buffer,
 604                            ULONG Size,
 605                            PULONG ReqSize)
 606 {
 607   PLIST_ENTRY current_entry;
 608   PMODULE_OBJECT current;
 609   ULONG ModuleCount = 0;
 610   PSYSTEM_MODULES Smi;
 611   ANSI_STRING AnsiName;
 612   PCHAR p;
 613   KIRQL Irql;
 614
 615   KeAcquireSpinLock(&ModuleListLock,&Irql);
 616
 617   /* calculate required size */
 618   current_entry = ModuleListHead.Flink;
 619   while (current_entry != (&ModuleListHead))
 620     {
 621       ModuleCount++;
 622       current_entry = current_entry->Flink;
 623     }
 624
 625   *ReqSize = sizeof(SYSTEM_MODULES)+
 626     (ModuleCount - 1) * sizeof(SYSTEM_MODULE_INFORMATION);
 627
 628   if (Size < *ReqSize)
 629     {
 630       KeReleaseSpinLock(&ModuleListLock, Irql);
 631       return(STATUS_INFO_LENGTH_MISMATCH);
 632     }
 633
 634   /* fill the buffer */
 635   memset(Buffer, '=', Size);
 636
 637   Smi = (PSYSTEM_MODULES)Buffer;
 638   Smi->Count = ModuleCount;
 639
 640   ModuleCount = 0;
 641   current_entry = ModuleListHead.Flink;
 642   while (current_entry != (&ModuleListHead))
 643     {
 644       current = CONTAINING_RECORD(current_entry,MODULE_OBJECT,ListEntry);
 645
 646       Smi->Modules[ModuleCount].Reserved[0] = 0;                /* Always 0 */
 647       Smi->Modules[ModuleCount].Reserved[1] = 0;                /* Always 0 */
 648       Smi->Modules[ModuleCount].Base = current->Base;
 649       Smi->Modules[ModuleCount].Size = current->Length;
 650       Smi->Modules[ModuleCount].Flags = 0;              /* Flags ??? (GN) */
 651       Smi->Modules[ModuleCount].Index = ModuleCount;
 652       Smi->Modules[ModuleCount].Unknown = 0;
 653       Smi->Modules[ModuleCount].LoadCount = 0; /* FIXME */
 654
 655       AnsiName.Length = 0;
 656       AnsiName.MaximumLength = 256;
 657       AnsiName.Buffer = Smi->Modules[ModuleCount].ImageName;
 658       RtlUnicodeStringToAnsiString(&AnsiName,
 659                                    &current->FullName,
 660                                    FALSE);
 661
 662       p = strrchr(AnsiName.Buffer, '\\');
 663       if (p == NULL)
 664         {
 665           Smi->Modules[ModuleCount].ModuleNameOffset = 0;
 666         }
 667       else
 668         {
 669           p++;
 670           Smi->Modules[ModuleCount].ModuleNameOffset = p - AnsiName.Buffer;
 671         }
 672
 673       ModuleCount++;
 674       current_entry = current_entry->Flink;
 675     }
 676
 677   KeReleaseSpinLock(&ModuleListLock, Irql);
 678
 679   return(STATUS_SUCCESS);
 680 }
 681
 682 #endif /* LIBCAPTIVE */
 683
 684 #ifndef LIBCAPTIVE
 685 static
 686 #endif /* LIBCAPTIVE */
 687 VOID
 688 LdrpBuildModuleBaseName(PUNICODE_STRING BaseName,
 689                         PUNICODE_STRING FullName)
 690 {
 691    UNICODE_STRING Name;
 692    PWCHAR p;
 693    PWCHAR q;
 694
 695    DPRINT("LdrpBuildModuleBaseName()\n");
 696    DPRINT("FullName %wZ\n", FullName);
 697
 698    p = wcsrchr(FullName->Buffer, L'\\');
 699    if (p == NULL)
 700      {
 701         p = FullName->Buffer;
 702      }
 703    else
 704      {
 705         p++;
 706      }
 707
 708    DPRINT("p %S\n", p);
 709
 710    RtlCreateUnicodeString(&Name, p);
 711
 712    q = wcschr(Name.Buffer, L'.');
 713    if (q != NULL)
 714      {
 715         *q = (WCHAR)0;
 716      }
 717
 718    DPRINT("p %S\n", p);
 719
 720    RtlCreateUnicodeString(BaseName, Name.Buffer);
 721    RtlFreeUnicodeString(&Name);
 722 }
 723
 724
 725 static LONG
 726 LdrpCompareModuleNames(IN PUNICODE_STRING String1,
 727                        IN PUNICODE_STRING String2)
 728 {
 729   ULONG len1, len2, i;
 730   PWCHAR s1, s2, p;
 731   WCHAR  c1, c2;
 732
 733   if (String1 && String2)
 734     {
 735       /* Search String1 for last path component */
 736       len1 = String1->Length / sizeof(WCHAR);
 737       s1 = String1->Buffer;
 738       for (i = 0, p = String1->Buffer; i < String1->Length; i = i + sizeof(WCHAR), p++)
 739         {
 740           if (*p == L'\\')
 741             {
 742               if (i == String1->Length - sizeof(WCHAR))
 743                 {
 744                   s1 = NULL;
 745                   len1 = 0;
 746                 }
 747               else
 748                 {
 749                   s1 = p + 1;
 750                   len1 = (String1->Length - i) / sizeof(WCHAR);
 751                 }
 752             }
 753         }
 754
 755       /* Search String2 for last path component */
 756       len2 = String2->Length / sizeof(WCHAR);
 757       s2 = String2->Buffer;
 758       for (i = 0, p = String2->Buffer; i < String2->Length; i = i + sizeof(WCHAR), p++)
 759         {
 760           if (*p == L'\\')
 761             {
 762               if (i == String2->Length - sizeof(WCHAR))
 763                 {
 764                   s2 = NULL;
 765                   len2 = 0;
 766                 }
 767               else
 768                 {
 769                   s2 = p + 1;
 770                   len2 = (String2->Length - i) / sizeof(WCHAR);
 771                 }
 772             }
 773         }
 774
 775       /* Compare last path components */
 776       if (s1 && s2)
 777         {
 778           while (1)
 779             {
 780               c1 = len1-- ? RtlUpcaseUnicodeChar (*s1++) : 0;
 781               c2 = len2-- ? RtlUpcaseUnicodeChar (*s2++) : 0;
 782               if ((c1 == 0 && c2 == L'.') || (c1 == L'.' && c2 == 0))
 783                 return(0);
 784               if (!c1 || !c2 || c1 != c2)
 785                 return(c1 - c2);
 786             }
 787         }
 788     }
 789
 790   return(0);
 791 }
 792
 793
 794 PMODULE_OBJECT
 795 LdrGetModuleObject(PUNICODE_STRING ModuleName)
 796 {
 797   PMODULE_OBJECT Module;
 798   PLIST_ENTRY Entry;
 799   KIRQL Irql;
 800
 801   DPRINT("LdrpGetModuleObject(%wZ) called\n", ModuleName);
 802
 803   KeAcquireSpinLock(&ModuleListLock,&Irql);
 804
 805   Entry = ModuleListHead.Flink;
 806   while (Entry != &ModuleListHead)
 807     {
 808       Module = CONTAINING_RECORD(Entry, MODULE_OBJECT, ListEntry);
 809
 810       DPRINT("Comparing %wZ and %wZ\n",
 811              &Module->BaseName,
 812              ModuleName);
 813
 814       if (!LdrpCompareModuleNames(&Module->BaseName, ModuleName))
 815         {
 816           DPRINT("Module %wZ\n", &Module->BaseName);
 817           KeReleaseSpinLock(&ModuleListLock, Irql);
 818           return(Module);
 819         }
 820
 821       Entry = Entry->Flink;
 822     }
 823
 824   KeReleaseSpinLock(&ModuleListLock, Irql);
 825
 826   DPRINT("Could not find module '%wZ'\n", ModuleName);
 827
 828   return(NULL);
 829 }
 830
 831
 832 /*  ----------------------------------------------  PE Module support */
 833
 834 static BOOL
 835 PageNeedsWriteAccess(PVOID PageStart,
 836                      PVOID DriverBase,
 837                      PIMAGE_FILE_HEADER PEFileHeader,
 838                      PIMAGE_SECTION_HEADER PESectionHeaders)
 839 {
 840   BOOL NeedsWriteAccess;
 841   unsigned Idx;
 842   ULONG Characteristics;
 843   ULONG Length;
 844   PVOID BaseAddress;
 845
 846   NeedsWriteAccess = FALSE;
 847   /* Set the protections for the various parts of the driver */
 848   for (Idx = 0; Idx < PEFileHeader->NumberOfSections && ! NeedsWriteAccess; Idx++)
 849     {
 850       Characteristics = PESectionHeaders[Idx].Characteristics;
 851       if (!(Characteristics & IMAGE_SECTION_CHAR_CODE) ||
 852           (Characteristics & IMAGE_SECTION_CHAR_WRITABLE ||
 853            Characteristics & IMAGE_SECTION_CHAR_DATA ||
 854            Characteristics & IMAGE_SECTION_CHAR_BSS))
 855         {
 856           Length =
 857               max(PESectionHeaders[Idx].Misc.VirtualSize,
 858                   PESectionHeaders[Idx].SizeOfRawData);
 859           BaseAddress = PESectionHeaders[Idx].VirtualAddress + DriverBase;
 860           NeedsWriteAccess = BaseAddress < PageStart + PAGE_SIZE &&
 861                              PageStart < (PVOID)((PCHAR) BaseAddress + Length);
 862         }
 863     }
 864
 865   return(NeedsWriteAccess);
 866 }
 867
 868 static NTSTATUS
 869 LdrPEProcessModule(PVOID ModuleLoadBase,
 870                    PUNICODE_STRING FileName,
 871                    PMODULE_OBJECT *ModuleObject)
 872 {
 873   unsigned int DriverSize, Idx;
 874   ULONG RelocDelta, NumRelocs;
 875   DWORD CurrentSize, TotalRelocs;
 876   PVOID DriverBase;
 877   PULONG PEMagic;
 878   PIMAGE_DOS_HEADER PEDosHeader;
 879   PIMAGE_FILE_HEADER PEFileHeader;
 880   PIMAGE_OPTIONAL_HEADER PEOptionalHeader;
 881   PIMAGE_SECTION_HEADER PESectionHeaders;
 882   PRELOCATION_DIRECTORY RelocDir;
 883   PRELOCATION_ENTRY RelocEntry;
 884   PMODULE_OBJECT  LibraryModuleObject;
 885   PMODULE_OBJECT CreatedModuleObject;
 886   PVOID *ImportAddressList;
 887   PULONG FunctionNameList;
 888   PCHAR pName;
 889   WORD Hint;
 890   UNICODE_STRING ModuleName;
 891   UNICODE_STRING NameString;
 892   WCHAR  NameBuffer[60];
 893   MODULE_TEXT_SECTION* ModuleTextSection;
 894   NTSTATUS Status;
 895   KIRQL Irql;
 896
 897   DPRINT("Processing PE Module at module base:%08lx\n", ModuleLoadBase);
 898
 899   /*  Get header pointers  */
 900   PEDosHeader = (PIMAGE_DOS_HEADER) ModuleLoadBase;
 901   PEMagic = (PULONG) ((unsigned int) ModuleLoadBase +
 902     PEDosHeader->e_lfanew);
 903   PEFileHeader = (PIMAGE_FILE_HEADER) ((unsigned int) ModuleLoadBase +
 904     PEDosHeader->e_lfanew + sizeof(ULONG));
 905   PEOptionalHeader = (PIMAGE_OPTIONAL_HEADER) ((unsigned int) ModuleLoadBase +
 906     PEDosHeader->e_lfanew + sizeof(ULONG) + sizeof(IMAGE_FILE_HEADER));
 907   PESectionHeaders = (PIMAGE_SECTION_HEADER) ((unsigned int) ModuleLoadBase +
 908     PEDosHeader->e_lfanew + sizeof(ULONG) + sizeof(IMAGE_FILE_HEADER) +
 909     sizeof(IMAGE_OPTIONAL_HEADER));
 910   CHECKPOINT;
 911
 912   /*  Check file magic numbers  */
 913   if (PEDosHeader->e_magic != IMAGE_DOS_MAGIC)
 914     {
 915       CPRINT("Incorrect MZ magic: %04x\n", PEDosHeader->e_magic);
 916       return STATUS_UNSUCCESSFUL;
 917     }
 918   if (PEDosHeader->e_lfanew == 0)
 919     {
 920       CPRINT("Invalid lfanew offset: %08x\n", PEDosHeader->e_lfanew);
 921       return STATUS_UNSUCCESSFUL;
 922     }
 923   if (*PEMagic != IMAGE_PE_MAGIC)
 924     {
 925       CPRINT("Incorrect PE magic: %08x\n", *PEMagic);
 926       return STATUS_UNSUCCESSFUL;
 927     }
 928   if (PEFileHeader->Machine != IMAGE_FILE_MACHINE_I386)
 929     {
 930       CPRINT("Incorrect Architechture: %04x\n", PEFileHeader->Machine);
 931       return STATUS_UNSUCCESSFUL;
 932     }
 933   CHECKPOINT;
 934
 935   /* FIXME: if image is fixed-address load, then fail  */
 936
 937   /* FIXME: check/verify OS version number  */
 938
 939   DPRINT("OptionalHdrMagic:%04x LinkVersion:%d.%d\n",
 940          PEOptionalHeader->Magic,
 941          PEOptionalHeader->MajorLinkerVersion,
 942          PEOptionalHeader->MinorLinkerVersion);
 943   DPRINT("Entry Point:%08lx\n", PEOptionalHeader->AddressOfEntryPoint);
 944   CHECKPOINT;
 945
 946   /*  Determine the size of the module  */
 947   DriverSize = PEOptionalHeader->SizeOfImage;
 948   DPRINT("DriverSize %x\n",DriverSize);
 949
 950   /*  Allocate a virtual section for the module  */
 951   DriverBase = MmAllocateSection(DriverSize);
 952   if (DriverBase == 0)
 953     {
 954       CPRINT("Failed to allocate a virtual section for driver\n");
 955       return STATUS_UNSUCCESSFUL;
 956     }
 957   DbgPrint("DriverBase for %wZ: %x\n", FileName, DriverBase);
 958   CHECKPOINT;
 959   /*  Copy headers over */
 960   memcpy(DriverBase, ModuleLoadBase, PEOptionalHeader->SizeOfHeaders);
 961    CurrentSize = 0;
 962   /*  Copy image sections into virtual section  */
 963   for (Idx = 0; Idx < PEFileHeader->NumberOfSections; Idx++)
 964     {
 965       //  Copy current section into current offset of virtual section
 966       if (PESectionHeaders[Idx].Characteristics &
 967           (IMAGE_SECTION_CHAR_CODE | IMAGE_SECTION_CHAR_DATA))
 968         {
 969            DPRINT("PESectionHeaders[Idx].VirtualAddress + DriverBase %x\n",
 970                   PESectionHeaders[Idx].VirtualAddress + DriverBase);
 971            memcpy(PESectionHeaders[Idx].VirtualAddress + DriverBase,
 972                   (PVOID)(ModuleLoadBase + PESectionHeaders[Idx].PointerToRawData),
 973                   PESectionHeaders[Idx].Misc.VirtualSize > PESectionHeaders[Idx].SizeOfRawData
 974                   ? PESectionHeaders[Idx].SizeOfRawData : PESectionHeaders[Idx].Misc.VirtualSize );
 975         }
 976       else
 977         {
 978            DPRINT("PESectionHeaders[Idx].VirtualAddress + DriverBase %x\n",
 979                   PESectionHeaders[Idx].VirtualAddress + DriverBase);
 980            memset(PESectionHeaders[Idx].VirtualAddress + DriverBase,
 981                   '\0', PESectionHeaders[Idx].Misc.VirtualSize);
 982
 983         }
 984       CurrentSize += ROUND_UP(PESectionHeaders[Idx].Misc.VirtualSize,
 985                               PEOptionalHeader->SectionAlignment);
 986
 987
 988 //      CurrentBase = (PVOID)((DWORD)CurrentBase +
 989   //      ROUND_UP(PESectionHeaders[Idx].SizeOfRawData.Misc.VirtualSize,
 990     //             PEOptionalHeader->SectionAlignment));
 991     }
 992
 993   /*  Perform relocation fixups  */
 994   RelocDelta = (DWORD) DriverBase - PEOptionalHeader->ImageBase;
 995   RelocDir = (PRELOCATION_DIRECTORY)(PEOptionalHeader->DataDirectory[
 996     IMAGE_DIRECTORY_ENTRY_BASERELOC].VirtualAddress);
 997   DPRINT("DrvrBase:%08lx ImgBase:%08lx RelocDelta:%08lx\n",
 998          DriverBase,
 999          PEOptionalHeader->ImageBase,
1000          RelocDelta);
1001   DPRINT("RelocDir %x\n",RelocDir);
1002 #if 1
1003   for (Idx = 0; Idx < PEFileHeader->NumberOfSections; Idx++)
1004     {
1005        if (PESectionHeaders[Idx].VirtualAddress == (DWORD)RelocDir)
1006          {
1007             DPRINT("Name %.8s PESectionHeader[Idx].PointerToRawData %x\n",
1008                    PESectionHeaders[Idx].Name,
1009                    PESectionHeaders[Idx].PointerToRawData);
1010             RelocDir = PESectionHeaders[Idx].PointerToRawData +
1011               ModuleLoadBase;
1012             CurrentSize = PESectionHeaders[Idx].Misc.VirtualSize;
1013             break;
1014          }
1015     }
1016 #else
1017    RelocDir = RelocDir + (ULONG)DriverBase;
1018    CurrentSize = PEOptionalHeader->DataDirectory
1019                   [IMAGE_DIRECTORY_ENTRY_BASERELOC].Size;
1020 #endif
1021   DPRINT("RelocDir %08lx CurrentSize %08lx\n", RelocDir, CurrentSize);
1022   TotalRelocs = 0;
1023   while (TotalRelocs < CurrentSize && RelocDir->SizeOfBlock != 0)
1024     {
1025       NumRelocs = (RelocDir->SizeOfBlock - sizeof(RELOCATION_DIRECTORY)) /
1026         sizeof(WORD);
1027 /*      DPRINT("RelocDir at %08lx for VA %08lx with %08lx relocs\n",
1028              RelocDir,
1029              RelocDir->VirtualAddress,
1030              NumRelocs);*/
1031       RelocEntry = (PRELOCATION_ENTRY) ((DWORD)RelocDir +
1032         sizeof(RELOCATION_DIRECTORY));
1033       for (Idx = 0; Idx < NumRelocs; Idx++)
1034         {
1035            ULONG Offset;
1036            ULONG Type;
1037            PDWORD RelocItem;
1038
1039            Offset = RelocEntry[Idx].TypeOffset & 0xfff;
1040            Type = (RelocEntry[Idx].TypeOffset >> 12) & 0xf;
1041            RelocItem = (PDWORD)(DriverBase + RelocDir->VirtualAddress +
1042                                 Offset);
1043 /*         DPRINT("  reloc at %08lx %x %s old:%08lx new:%08lx\n",
1044                   RelocItem,
1045                   Type,
1046                   Type ? "HIGHLOW" : "ABS",
1047                   *RelocItem,
1048                   (*RelocItem) + RelocDelta); */
1049           if (Type == 3)
1050             {
1051               (*RelocItem) += RelocDelta;
1052             }
1053           else if (Type != 0)
1054             {
1055               CPRINT("Unknown relocation type %x at %x\n",Type, &Type);
1056               return STATUS_UNSUCCESSFUL;
1057             }
1058         }
1059       TotalRelocs += RelocDir->SizeOfBlock;
1060       RelocDir = (PRELOCATION_DIRECTORY)((DWORD)RelocDir +
1061         RelocDir->SizeOfBlock);
1062 //      DPRINT("TotalRelocs: %08lx  CurrentSize: %08lx\n", TotalRelocs, CurrentSize);
1063     }
1064
1065   DPRINT("PEOptionalHeader->DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT] %x\n",
1066          PEOptionalHeader->DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT]
1067          .VirtualAddress);
1068   /*  Perform import fixups  */
1069   if (PEOptionalHeader->DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT].VirtualAddress)
1070     {
1071       PIMAGE_IMPORT_MODULE_DIRECTORY ImportModuleDirectory;
1072
1073       /*  Process each import module  */
1074       ImportModuleDirectory = (PIMAGE_IMPORT_MODULE_DIRECTORY)
1075         ((DWORD)DriverBase + PEOptionalHeader->
1076           DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT].VirtualAddress);
1077       DPRINT("Processeing import directory at %p\n", ImportModuleDirectory);
1078       while (ImportModuleDirectory->dwRVAModuleName)
1079         {
1080           /*  Check to make sure that import lib is kernel  */
1081           pName = (PCHAR) DriverBase +
1082             ImportModuleDirectory->dwRVAModuleName;
1083
1084           RtlCreateUnicodeStringFromAsciiz(&ModuleName, pName);
1085           DPRINT("Import module: %wZ\n", &ModuleName);
1086
1087           LibraryModuleObject = LdrGetModuleObject(&ModuleName);
1088           if (LibraryModuleObject == NULL)
1089             {
1090               DPRINT("Module '%wZ' not loaded yet\n", &ModuleName);
1091               wcscpy(NameBuffer, REACTOS_UCS2(L"\\SystemRoot\\system32\\drivers\\"));
1092               wcscat(NameBuffer, ModuleName.Buffer);
1093               RtlInitUnicodeString(&NameString, NameBuffer);
1094               Status = LdrLoadModule(&NameString, &LibraryModuleObject);
1095               if (!NT_SUCCESS(Status))
1096                 {
1097                   wcscpy(NameBuffer, REACTOS_UCS2(L"\\SystemRoot\\system32\\"));
1098                   wcscat(NameBuffer, ModuleName.Buffer);
1099                   RtlInitUnicodeString(&NameString, NameBuffer);
1100                   Status = LdrLoadModule(&NameString, &LibraryModuleObject);
1101                   if (!NT_SUCCESS(Status))
1102                     {
1103                       DPRINT1("Unknown import module: %wZ (Status %lx)\n", &ModuleName, Status);
1104                       return(Status);
1105                     }
1106                 }
1107             }
1108           /*  Get the import address list  */
1109           ImportAddressList = (PVOID *) ((DWORD)DriverBase +
1110             ImportModuleDirectory->dwRVAFunctionAddressList);
1111
1112           /*  Get the list of functions to import  */
1113           if (ImportModuleDirectory->dwRVAFunctionNameList != 0)
1114             {
1115               FunctionNameList = (PULONG) ((DWORD)DriverBase +
1116                 ImportModuleDirectory->dwRVAFunctionNameList);
1117             }
1118           else
1119             {
1120               FunctionNameList = (PULONG) ((DWORD)DriverBase +
1121                 ImportModuleDirectory->dwRVAFunctionAddressList);
1122             }
1123           /*  Walk through function list and fixup addresses  */
1124           while (*FunctionNameList != 0L)
1125             {
1126               if ((*FunctionNameList) & 0x80000000) // hint
1127                 {
1128                   pName = NULL;
1129
1130
1131                   Hint = (*FunctionNameList) & 0xffff;
1132                 }
1133               else // hint-name
1134                 {
1135                   pName = (PCHAR)((DWORD)DriverBase +
1136                                   *FunctionNameList + 2);
1137                   Hint = *(PWORD)((DWORD)DriverBase + *FunctionNameList);
1138                 }
1139               DPRINT("  Hint:%04x  Name:%s\n", Hint, pName);
1140
1141               /*  Fixup the current import symbol  */
1142               if (LibraryModuleObject != NULL)
1143                 {
1144                   *ImportAddressList = LdrGetExportAddress(LibraryModuleObject,
1145                                                            pName,
1146                                                            Hint);
1147                 }
1148               else
1149                 {
1150                   CPRINT("Unresolved kernel symbol: %s\n", pName);
1151                   return STATUS_UNSUCCESSFUL;
1152                 }
1153               ImportAddressList++;
1154               FunctionNameList++;
1155             }
1156
1157           RtlFreeUnicodeString(&ModuleName);
1158
1159           ImportModuleDirectory++;
1160         }
1161     }
1162
1163   /* Set the protections for the various parts of the driver */
1164   for (Idx = 0; Idx < PEFileHeader->NumberOfSections; Idx++)
1165     {
1166       ULONG Characteristics = PESectionHeaders[Idx].Characteristics;
1167       ULONG Length;
1168       PVOID BaseAddress;
1169       PVOID PageAddress;
1170       if (Characteristics & IMAGE_SECTION_CHAR_CODE &&
1171           !(Characteristics & IMAGE_SECTION_CHAR_WRITABLE ||
1172             Characteristics & IMAGE_SECTION_CHAR_DATA ||
1173             Characteristics & IMAGE_SECTION_CHAR_BSS))
1174         {
1175           Length =
1176               max(PESectionHeaders[Idx].Misc.VirtualSize,
1177                   PESectionHeaders[Idx].SizeOfRawData);
1178           BaseAddress = PESectionHeaders[Idx].VirtualAddress + DriverBase;
1179           PageAddress = (PVOID)PAGE_ROUND_DOWN(BaseAddress);
1180           if (! PageNeedsWriteAccess(PageAddress, DriverBase, PEFileHeader, PESectionHeaders))
1181             {
1182               MmSetPageProtect(NULL, PageAddress, PAGE_READONLY);
1183             }
1184           PageAddress = (PVOID)((PCHAR) PageAddress + PAGE_SIZE);
1185           while ((PVOID)((PCHAR) PageAddress + PAGE_SIZE) <
1186                  (PVOID)((PCHAR) BaseAddress + Length))
1187             {
1188               MmSetPageProtect(NULL, PageAddress, PAGE_READONLY);
1189               PageAddress = (PVOID)((PCHAR) PageAddress + PAGE_SIZE);
1190             }
1191           if (PageAddress < (PVOID)((PCHAR) BaseAddress + Length) &&
1192               ! PageNeedsWriteAccess(PageAddress, DriverBase, PEFileHeader, PESectionHeaders))
1193             {
1194               MmSetPageProtect(NULL, PageAddress, PAGE_READONLY);
1195             }
1196         }
1197     }
1198
1199   /* Create the module */
1200   CreatedModuleObject = ExAllocatePool(NonPagedPool, sizeof(MODULE_OBJECT));
1201   if (CreatedModuleObject == NULL)
1202     {
1203       return(STATUS_INSUFFICIENT_RESOURCES);
1204     }
1205
1206   RtlZeroMemory(CreatedModuleObject, sizeof(MODULE_OBJECT));
1207
1208    /*  Initialize ModuleObject data  */
1209   CreatedModuleObject->Base = DriverBase;
1210   CreatedModuleObject->Flags = MODULE_FLAG_PE;
1211
1212   RtlCreateUnicodeString(&CreatedModuleObject->FullName,
1213                          FileName->Buffer);
1214   LdrpBuildModuleBaseName(&CreatedModuleObject->BaseName,
1215                           &CreatedModuleObject->FullName);
1216
1217   CreatedModuleObject->EntryPoint =
1218     (PVOID)((DWORD)DriverBase +
1219             PEOptionalHeader->AddressOfEntryPoint);
1220   CreatedModuleObject->Length = DriverSize;
1221   DPRINT("EntryPoint at %x\n", CreatedModuleObject->EntryPoint);
1222
1223   CreatedModuleObject->Image.PE.FileHeader =
1224     (PIMAGE_FILE_HEADER) ((unsigned int) DriverBase + PEDosHeader->e_lfanew + sizeof(ULONG));
1225
1226   DPRINT("FileHeader at %x\n", CreatedModuleObject->Image.PE.FileHeader);
1227   CreatedModuleObject->Image.PE.OptionalHeader =
1228     (PIMAGE_OPTIONAL_HEADER) ((unsigned int) DriverBase + PEDosHeader->e_lfanew + sizeof(ULONG) +
1229     sizeof(IMAGE_FILE_HEADER));
1230   DPRINT("OptionalHeader at %x\n", CreatedModuleObject->Image.PE.OptionalHeader);
1231   CreatedModuleObject->Image.PE.SectionList =
1232     (PIMAGE_SECTION_HEADER) ((unsigned int) DriverBase + PEDosHeader->e_lfanew + sizeof(ULONG) +
1233     sizeof(IMAGE_FILE_HEADER) + sizeof(IMAGE_OPTIONAL_HEADER));
1234   DPRINT("SectionList at %x\n", CreatedModuleObject->Image.PE.SectionList);
1235
1236   /* Insert module */
1237   KeAcquireSpinLock(&ModuleListLock, &Irql);
1238   InsertTailList(&ModuleListHead,
1239                  &CreatedModuleObject->ListEntry);
1240   KeReleaseSpinLock(&ModuleListLock, Irql);
1241
1242
1243   ModuleTextSection = ExAllocatePool(NonPagedPool,
1244                                      sizeof(MODULE_TEXT_SECTION));
1245   assert(ModuleTextSection);
1246   RtlZeroMemory(ModuleTextSection, sizeof(MODULE_TEXT_SECTION));
1247   ModuleTextSection->Base = (ULONG)DriverBase;
1248   ModuleTextSection->Length = DriverSize;
1249   ModuleTextSection->Name = ExAllocatePool(NonPagedPool,
1250         (wcslen(CreatedModuleObject->BaseName.Buffer) + 1) * sizeof(WCHAR));
1251   wcscpy(ModuleTextSection->Name, CreatedModuleObject->BaseName.Buffer);
1252   ModuleTextSection->OptionalHeader =
1253     CreatedModuleObject->Image.PE.OptionalHeader;
1254   InsertTailList(&ModuleTextListHead, &ModuleTextSection->ListEntry);
1255
1256   CreatedModuleObject->TextSection = ModuleTextSection;
1257
1258   *ModuleObject = CreatedModuleObject;
1259
1260   DPRINT("Loading Module %wZ...\n", FileName);
1261
1262   if ((KdDebuggerEnabled == TRUE) && (KdDebugState & KD_DEBUG_GDB))
1263     {
1264       DPRINT("Module %wZ loaded at 0x%.08x.\n",
1265               FileName, CreatedModuleObject->Base);
1266     }
1267
1268   return STATUS_SUCCESS;
1269 }
1270
1271 #ifndef LIBCAPTIVE
1272
1273 PVOID
1274 LdrSafePEProcessModule(PVOID ModuleLoadBase,
1275                        PVOID DriverBase,
1276                        PVOID ImportModuleBase,
1277                        PULONG DriverSize)
1278 {
1279   unsigned int Idx;
1280   ULONG RelocDelta, NumRelocs;
1281   ULONG CurrentSize, TotalRelocs;
1282   PULONG PEMagic;
1283   PIMAGE_DOS_HEADER PEDosHeader;
1284   PIMAGE_FILE_HEADER PEFileHeader;
1285   PIMAGE_OPTIONAL_HEADER PEOptionalHeader;
1286   PIMAGE_SECTION_HEADER PESectionHeaders;
1287   PRELOCATION_DIRECTORY RelocDir;
1288   PRELOCATION_ENTRY RelocEntry;
1289   PVOID *ImportAddressList;
1290   PULONG FunctionNameList;
1291   PCHAR pName;
1292   USHORT Hint;
1293
1294   ps("Processing PE Module at module base:%08lx\n", ModuleLoadBase);
1295
1296   /*  Get header pointers  */
1297   PEDosHeader = (PIMAGE_DOS_HEADER) ModuleLoadBase;
1298   PEMagic = (PULONG) ((unsigned int) ModuleLoadBase +
1299     PEDosHeader->e_lfanew);
1300   PEFileHeader = (PIMAGE_FILE_HEADER) ((unsigned int) ModuleLoadBase +
1301     PEDosHeader->e_lfanew + sizeof(ULONG));
1302   PEOptionalHeader = (PIMAGE_OPTIONAL_HEADER) ((unsigned int) ModuleLoadBase +
1303     PEDosHeader->e_lfanew + sizeof(ULONG) + sizeof(IMAGE_FILE_HEADER));
1304   PESectionHeaders = (PIMAGE_SECTION_HEADER) ((unsigned int) ModuleLoadBase +
1305     PEDosHeader->e_lfanew + sizeof(ULONG) + sizeof(IMAGE_FILE_HEADER) +
1306     sizeof(IMAGE_OPTIONAL_HEADER));
1307   CHECKPOINT;
1308
1309   /*  Check file magic numbers  */
1310   if (PEDosHeader->e_magic != IMAGE_DOS_MAGIC)
1311     {
1312       return 0;
1313     }
1314   if (PEDosHeader->e_lfanew == 0)
1315     {
1316       return 0;
1317     }
1318   if (*PEMagic != IMAGE_PE_MAGIC)
1319     {
1320       return 0;
1321     }
1322   if (PEFileHeader->Machine != IMAGE_FILE_MACHINE_I386)
1323     {
1324       return 0;
1325     }
1326
1327   ps("OptionalHdrMagic:%04x LinkVersion:%d.%d\n",
1328          PEOptionalHeader->Magic,
1329          PEOptionalHeader->MajorLinkerVersion,
1330          PEOptionalHeader->MinorLinkerVersion);
1331   ps("Entry Point:%08lx\n", PEOptionalHeader->AddressOfEntryPoint);
1332
1333   /*  Determine the size of the module  */
1334   *DriverSize = PEOptionalHeader->SizeOfImage;
1335   ps("DriverSize %x\n",*DriverSize);
1336
1337   /*  Copy headers over */
1338   if (DriverBase != ModuleLoadBase)
1339     {
1340       memcpy(DriverBase, ModuleLoadBase, PEOptionalHeader->SizeOfHeaders);
1341     }
1342
1343   ps("Hdr: 0x%X\n", (ULONG)PEOptionalHeader);
1344   ps("Hdr->SizeOfHeaders: 0x%X\n", (ULONG)PEOptionalHeader->SizeOfHeaders);
1345   ps("FileHdr->NumberOfSections: 0x%X\n", (ULONG)PEFileHeader->NumberOfSections);
1346
1347   /* Ntoskrnl.exe need no relocation fixups since it is linked to run at the same
1348      address as it is mapped */
1349   if (DriverBase != ModuleLoadBase)
1350     {
1351       CurrentSize = 0;
1352
1353   /*  Copy image sections into virtual section  */
1354   for (Idx = 0; Idx < PEFileHeader->NumberOfSections; Idx++)
1355     {
1356       //  Copy current section into current offset of virtual section
1357       if (PESectionHeaders[Idx].Characteristics &
1358           (IMAGE_SECTION_CHAR_CODE | IMAGE_SECTION_CHAR_DATA))
1359         {
1360           //ps("PESectionHeaders[Idx].VirtualAddress (%X) + DriverBase %x\n",
1361           //PESectionHeaders[Idx].VirtualAddress, PESectionHeaders[Idx].VirtualAddress + DriverBase);
1362           memcpy(PESectionHeaders[Idx].VirtualAddress + DriverBase,
1363                  (PVOID)(ModuleLoadBase + PESectionHeaders[Idx].PointerToRawData),
1364                  PESectionHeaders[Idx].Misc.VirtualSize > PESectionHeaders[Idx].SizeOfRawData ?
1365                    PESectionHeaders[Idx].SizeOfRawData : PESectionHeaders[Idx].Misc.VirtualSize );
1366         }
1367       else
1368         {
1369           ps("PESectionHeaders[Idx].VirtualAddress (%X) + DriverBase %x\n",
1370              PESectionHeaders[Idx].VirtualAddress, PESectionHeaders[Idx].VirtualAddress + DriverBase);
1371           memset(PESectionHeaders[Idx].VirtualAddress + DriverBase,
1372                  '\0',
1373                  PESectionHeaders[Idx].Misc.VirtualSize);
1374         }
1375       CurrentSize += ROUND_UP(PESectionHeaders[Idx].Misc.VirtualSize,
1376                               PEOptionalHeader->SectionAlignment);
1377     }
1378
1379   /*  Perform relocation fixups  */
1380   RelocDelta = (ULONG) DriverBase - PEOptionalHeader->ImageBase;
1381   RelocDir = (PRELOCATION_DIRECTORY)(PEOptionalHeader->DataDirectory[
1382     IMAGE_DIRECTORY_ENTRY_BASERELOC].VirtualAddress);
1383   ps("DrvrBase:%08lx ImgBase:%08lx RelocDelta:%08lx\n",
1384          DriverBase,
1385          PEOptionalHeader->ImageBase,
1386          RelocDelta);
1387   ps("RelocDir %x\n",RelocDir);
1388
1389   for (Idx = 0; Idx < PEFileHeader->NumberOfSections; Idx++)
1390     {
1391       if (PESectionHeaders[Idx].VirtualAddress == (ULONG)RelocDir)
1392         {
1393           DPRINT("Name %.8s PESectionHeader[Idx].PointerToRawData %x\n",
1394                  PESectionHeaders[Idx].Name,
1395                  PESectionHeaders[Idx].PointerToRawData);
1396           RelocDir = PESectionHeaders[Idx].PointerToRawData + ModuleLoadBase;
1397           CurrentSize = PESectionHeaders[Idx].Misc.VirtualSize;
1398           break;
1399         }
1400     }
1401
1402   ps("RelocDir %08lx CurrentSize %08lx\n", RelocDir, CurrentSize);
1403
1404   TotalRelocs = 0;
1405   while (TotalRelocs < CurrentSize && RelocDir->SizeOfBlock != 0)
1406     {
1407       NumRelocs = (RelocDir->SizeOfBlock - sizeof(RELOCATION_DIRECTORY)) /
1408         sizeof(USHORT);
1409       RelocEntry = (PRELOCATION_ENTRY)((ULONG)RelocDir +
1410         sizeof(RELOCATION_DIRECTORY));
1411       for (Idx = 0; Idx < NumRelocs; Idx++)
1412         {
1413           ULONG Offset;
1414           ULONG Type;
1415           PULONG RelocItem;
1416
1417           Offset = RelocEntry[Idx].TypeOffset & 0xfff;
1418           Type = (RelocEntry[Idx].TypeOffset >> 12) & 0xf;
1419           RelocItem = (PULONG)(DriverBase + RelocDir->VirtualAddress + Offset);
1420           if (Type == 3)
1421             {
1422               (*RelocItem) += RelocDelta;
1423             }
1424           else if (Type != 0)
1425             {
1426               CPRINT("Unknown relocation type %x at %x\n",Type, &Type);
1427               return(0);
1428             }
1429         }
1430       TotalRelocs += RelocDir->SizeOfBlock;
1431       RelocDir = (PRELOCATION_DIRECTORY)((ULONG)RelocDir +
1432         RelocDir->SizeOfBlock);
1433     }
1434
1435     ps("PEOptionalHeader->DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT] %x\n",
1436          PEOptionalHeader->DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT]
1437          .VirtualAddress);
1438   }
1439
1440   /*  Perform import fixups  */
1441   if (PEOptionalHeader->DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT].VirtualAddress)
1442     {
1443       PIMAGE_IMPORT_MODULE_DIRECTORY ImportModuleDirectory;
1444
1445       /*  Process each import module  */
1446       ImportModuleDirectory = (PIMAGE_IMPORT_MODULE_DIRECTORY)
1447         ((ULONG)DriverBase + PEOptionalHeader->
1448           DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT].VirtualAddress);
1449
1450       ps("Processeing import directory at %p\n", ImportModuleDirectory);
1451
1452       /*  Check to make sure that import lib is kernel  */
1453       pName = (PCHAR)DriverBase + ImportModuleDirectory->dwRVAModuleName;
1454
1455       ps("Import module: %s\n", pName);
1456
1457       /*  Get the import address list  */
1458       ImportAddressList = (PVOID *)((ULONG)DriverBase +
1459         ImportModuleDirectory->dwRVAFunctionAddressList);
1460
1461       ps("  ImportModuleDirectory->dwRVAFunctionAddressList: 0x%X\n",
1462          ImportModuleDirectory->dwRVAFunctionAddressList);
1463       ps("  ImportAddressList: 0x%X\n", ImportAddressList);
1464
1465       /*  Get the list of functions to import  */
1466       if (ImportModuleDirectory->dwRVAFunctionNameList != 0)
1467         {
1468           ps("Using function name list.\n");
1469
1470           FunctionNameList = (PULONG)((ULONG)DriverBase +
1471             ImportModuleDirectory->dwRVAFunctionNameList);
1472         }
1473       else
1474         {
1475           ps("Using function address list.\n");
1476
1477           FunctionNameList = (PULONG)((ULONG)DriverBase +
1478             ImportModuleDirectory->dwRVAFunctionAddressList);
1479         }
1480
1481       /* Walk through function list and fixup addresses */
1482       while (*FunctionNameList != 0L)
1483         {
1484           if ((*FunctionNameList) & 0x80000000)
1485             {
1486                /* Hint */
1487               pName = NULL;
1488               Hint = (*FunctionNameList) & 0xffff;
1489             }
1490           else
1491             {
1492               /* Hint name */
1493               pName = (PCHAR)((ULONG)DriverBase + *FunctionNameList + 2);
1494               Hint = *(PWORD)((ULONG)DriverBase + *FunctionNameList);
1495             }
1496           //ps("  Hint:%04x  Name:%s(0x%X)(%x)\n", Hint, pName, pName, ImportAddressList);
1497
1498           *ImportAddressList = LdrSafePEGetExportAddress(ImportModuleBase,
1499                                                          pName,
1500                                                          Hint);
1501
1502           ImportAddressList++;
1503           FunctionNameList++;
1504         }
1505     }
1506
1507   ps("Finished importing.\n");
1508
1509   return(0);
1510 }
1511
1512 #endif /* LIBCAPTIVE */
1513
1514 static PVOID
1515 LdrPEGetExportAddress(PMODULE_OBJECT ModuleObject,
1516                       PCHAR Name,
1517                       USHORT Hint)
1518 {
1519   PIMAGE_EXPORT_DIRECTORY ExportDir;
1520   ULONG ExportDirSize;
1521   USHORT Idx;
1522   PVOID  ExportAddress;
1523   PWORD  OrdinalList;
1524   PDWORD FunctionList, NameList;
1525
1526    ExportDir = (PIMAGE_EXPORT_DIRECTORY)
1527      RtlImageDirectoryEntryToData(ModuleObject->Base,
1528                                   TRUE,
1529                                   IMAGE_DIRECTORY_ENTRY_EXPORT,
1530                                   &ExportDirSize);
1531    DPRINT("ExportDir %p ExportDirSize %lx\n", ExportDir, ExportDirSize);
1532    if (ExportDir == NULL)
1533      {
1534         return NULL;
1535      }
1536
1537    FunctionList = (PDWORD)((DWORD)ExportDir->AddressOfFunctions + ModuleObject->Base);
1538    NameList = (PDWORD)((DWORD)ExportDir->AddressOfNames + ModuleObject->Base);
1539    OrdinalList = (PWORD)((DWORD)ExportDir->AddressOfNameOrdinals + ModuleObject->Base);
1540
1541   ExportAddress = 0;
1542
1543   if (Name != NULL)
1544     {
1545       for (Idx = 0; Idx < ExportDir->NumberOfNames; Idx++)
1546         {
1547 #if 0
1548           DPRINT("  Name:%s  NameList[%d]:%s\n",
1549                  Name,
1550                  Idx,
1551                  (DWORD) ModuleObject->Base + NameList[Idx]);
1552
1553 #endif
1554           if (!strcmp(Name, (PCHAR) ((DWORD)ModuleObject->Base + NameList[Idx])))
1555             {
1556               ExportAddress = (PVOID) ((DWORD)ModuleObject->Base +
1557                 FunctionList[OrdinalList[Idx]]);
1558                   if (((ULONG)ExportAddress >= (ULONG)ExportDir) &&
1559                       ((ULONG)ExportAddress < (ULONG)ExportDir + ExportDirSize))
1560                     {
1561                        DPRINT("Forward: %s\n", (PCHAR)ExportAddress);
1562                        ExportAddress = LdrPEFixupForward((PCHAR)ExportAddress);
1563                        DPRINT("ExportAddress: %p\n", ExportAddress);
1564                     }
1565
1566               break;
1567             }
1568         }
1569     }
1570   else  /*  use hint  */
1571     {
1572 #ifndef LIBCAPTIVE
1573       ExportAddress = (PVOID) ((DWORD)ModuleObject->Base +
1574         FunctionList[Hint - ExportDir->Base]);
1575 #else /* !LIBCAPTIVE */
1576       /* Ordinals not supported by libcaptive */
1577       KeBugCheck(0);
1578 #endif /* !LIBCAPTIVE */
1579     }
1580
1581   if (ExportAddress == NULL)
1582     {
1583       CPRINT("Export not found for %d:%s\n",
1584              Hint,
1585              Name != NULL ? Name : "(Ordinal)");
1586       KeBugCheck(0);
1587     }
1588
1589   return(ExportAddress);
1590 }
1591
1592 #ifndef LIBCAPTIVE
1593
1594 static PVOID
1595 LdrSafePEGetExportAddress(PVOID ImportModuleBase,
1596                           PCHAR Name,
1597                           USHORT Hint)
1598 {
1599   USHORT Idx;
1600   PVOID  ExportAddress;
1601   PWORD  OrdinalList;
1602   PDWORD FunctionList, NameList;
1603   PIMAGE_EXPORT_DIRECTORY  ExportDir;
1604   ULONG ExportDirSize;
1605
1606   static BOOLEAN EP = FALSE;
1607
1608   ExportDir = (PIMAGE_EXPORT_DIRECTORY)
1609     RtlImageDirectoryEntryToData(ImportModuleBase,
1610           TRUE,
1611                 IMAGE_DIRECTORY_ENTRY_EXPORT,
1612                 &ExportDirSize);
1613
1614   if (!EP) {
1615     EP = TRUE;
1616     ps("ExportDir %x\n", ExportDir);
1617   }
1618
1619   FunctionList = (PDWORD)((DWORD)ExportDir->AddressOfFunctions + ImportModuleBase);
1620   NameList = (PDWORD)((DWORD)ExportDir->AddressOfNames + ImportModuleBase);
1621   OrdinalList = (PWORD)((DWORD)ExportDir->AddressOfNameOrdinals + ImportModuleBase);
1622
1623   ExportAddress = 0;
1624
1625   if (Name != NULL)
1626     {
1627       for (Idx = 0; Idx < ExportDir->NumberOfNames; Idx++)
1628         {
1629           if (!strcmp(Name, (PCHAR) ((DWORD)ImportModuleBase + NameList[Idx])))
1630                         {
1631               ExportAddress = (PVOID) ((DWORD)ImportModuleBase +
1632                 FunctionList[OrdinalList[Idx]]);
1633               break;
1634             }
1635         }
1636     }
1637   else  /*  use hint  */
1638     {
1639       ExportAddress = (PVOID) ((DWORD)ImportModuleBase +
1640
1641         FunctionList[Hint - ExportDir->Base]);
1642     }
1643
1644   if (ExportAddress == 0)
1645     {
1646       ps("Export not found for %d:%s\n",
1647          Hint,
1648          Name != NULL ? Name : "(Ordinal)");
1649       KeBugCheck(0);
1650     }
1651   return ExportAddress;
1652 }
1653
1654 #endif /* LIBCAPTIVE */
1655
1656 static PVOID
1657 LdrPEFixupForward(PCHAR ForwardName)
1658 {
1659    CHAR NameBuffer[128];
1660    UNICODE_STRING ModuleName;
1661    PCHAR p;
1662    PMODULE_OBJECT ModuleObject;
1663
1664    DPRINT("LdrPEFixupForward (%s)\n", ForwardName);
1665
1666    strcpy(NameBuffer, ForwardName);
1667    p = strchr(NameBuffer, '.');
1668    if (p == NULL)
1669      {
1670         return NULL;
1671      }
1672
1673    *p = 0;
1674
1675    DPRINT("Driver: %s  Function: %s\n", NameBuffer, p+1);
1676
1677    RtlCreateUnicodeStringFromAsciiz(&ModuleName,
1678                                     NameBuffer);
1679    ModuleObject = LdrGetModuleObject(&ModuleName);
1680    RtlFreeUnicodeString(&ModuleName);
1681
1682    DPRINT("ModuleObject: %p\n", ModuleObject);
1683
1684    if (ModuleObject == NULL)
1685      {
1686         CPRINT("LdrPEFixupForward: failed to find module %s\n", NameBuffer);
1687         return NULL;
1688      }
1689
1690   return(LdrPEGetExportAddress(ModuleObject, p+1, 0));
1691 }
1692
1693 /* EOF */