reactos/ntoskrnl/ldr/rtl.c

   1 /* $Id: rtl.c,v 1.6 2000/04/07 02:24:00 dwelch Exp $
   2  *
   3  * COPYRIGHT:       See COPYING in the top level directory
   4  * PROJECT:         ReactOS kernel
   5  * FILE:            ntoskrnl/ldr/loader.c
   6  * PURPOSE:         Loader utilities
   7  * PROGRAMMERS:     Jean Michault
   8  *                  Rex Jolliff (rex@lvcablemodem.com)
   9  */
  10
  11 /* INCLUDES *****************************************************************/
  12
  13 #include <ddk/ntddk.h>
  14 #include <internal/i386/segment.h>
  15 #include <internal/linkage.h>
  16 #include <internal/module.h>
  17 #include <internal/ntoskrnl.h>
  18 #include <internal/ob.h>
  19 #include <internal/ps.h>
  20 #include <string.h>
  21 #include <internal/string.h>
  22 #include <internal/teb.h>
  23 #include <internal/ldr.h>
  24
  25 //#define NDEBUG
  26 #include <internal/debug.h>
  27
  28 /* FUNCTIONS ****************************************************************/
  29
  30 PIMAGE_NT_HEADERS STDCALL RtlImageNtHeader (IN PVOID BaseAddress)
  31 {
  32    PIMAGE_DOS_HEADER DosHeader;
  33    PIMAGE_NT_HEADERS NTHeaders;
  34
  35    DPRINT("BaseAddress %x\n", BaseAddress);
  36    DosHeader = (PIMAGE_DOS_HEADER)BaseAddress;
  37    DPRINT("DosHeader %x\n", DosHeader);
  38    NTHeaders = (PIMAGE_NT_HEADERS)(BaseAddress + DosHeader->e_lfanew);
  39    DPRINT("NTHeaders %x\n", NTHeaders);
  40    DPRINT("DosHeader->e_magic %x DosHeader->e_lfanew %x\n",
  41           DosHeader->e_magic, DosHeader->e_lfanew);
  42    DPRINT("*NTHeaders %x\n", *(PULONG)NTHeaders);
  43    if ((DosHeader->e_magic != IMAGE_DOS_MAGIC)
  44        || (DosHeader->e_lfanew == 0L)
  45        || (*(PULONG) NTHeaders != IMAGE_PE_MAGIC))
  46      {
  47         return(NULL);
  48      }
  49    return(NTHeaders);
  50 }
  51
  52
  53 /* EOF */