mcs/class/Mono.PEToolkit/DOSHeader.cs

   1 /*\r
   2  * Copyright (c) 2002 Sergey Chaban <serge@wildwestsoftware.com>\r
   3  */\r
   4 \r
   5 using System;\r
   6 using System.IO;\r
   7 using System.Runtime.InteropServices;\r
   8 \r
   9 namespace Mono.PEToolkit {\r
  10 \r
  11         [StructLayout(LayoutKind.Explicit)]\r
  12         public struct DOSHeader {\r
  13                 // Magic number (ExeSignature.DOS).\r
  14                 [FieldOffset(0*2)]  public ExeSignature magic;\r
  15 \r
  16                 // Bytes on last page of file.\r
  17                 [FieldOffset(1*2)]  public short cblp;\r
  18 \r
  19                 // Pages in file.\r
  20                 [FieldOffset(2*2)]  public short cp;\r
  21 \r
  22                 // Relocations.\r
  23                 [FieldOffset(3*2)]  public short crlc;\r
  24 \r
  25                 // Size of header in paragraphs.\r
  26                 [FieldOffset(4*2)]  public short cparhdr;\r
  27 \r
  28                 // Minimum extra paragraphs needed.\r
  29                 [FieldOffset(5*2)]  public short minalloc;\r
  30 \r
  31                 // Maximum extra paragraphs needed.\r
  32                 [FieldOffset(6*2)]  public short maxalloc;\r
  33 \r
  34                 // Initial (relative) SS value.\r
  35                 [FieldOffset(7*2)]  public short ss;\r
  36 \r
  37                 // Initial SP value.\r
  38                 [FieldOffset(8*2)]  public short sp;\r
  39 \r
  40                 // Checksum.\r
  41                 [FieldOffset(9*2)]  public short csum;\r
  42 \r
  43                 // Initial IP value.\r
  44                 [FieldOffset(10*2)] public short ip;\r
  45 \r
  46                 // Initial (relative) CS value.\r
  47                 [FieldOffset(11*2)] public short cs;\r
  48 \r
  49                 // File address of relocation table.\r
  50                 [FieldOffset(12*2)] public short lfarlc;\r
  51 \r
  52                 // Overlay number.\r
  53                 [FieldOffset(13*2)] public short ovno;\r
  54 \r
  55                 // Reserved words.\r
  56                 // short[4] res;\r
  57 \r
  58                 // OEM identifier (for e_oeminfo).\r
  59                 [FieldOffset(18*2)] public short oemid;\r
  60 \r
  61                 // OEM information; e_oemid specific.\r
  62                 [FieldOffset(19*2)] public short oeminfo;\r
  63 \r
  64                 // Reserved words\r
  65                 // short[10] res2;\r
  66 \r
  67                 // File address of new exe header.\r
  68                 [FieldOffset(30*2)] public uint lfanew;\r
  69 \r
  70 \r
  71 \r
  72                 /// <summary>\r
  73                 /// </summary>\r
  74                 unsafe public void Read(BinaryReader reader)\r
  75                 {\r
  76                         fixed (void* pThis = &this) {\r
  77                                 PEUtils.ReadStruct(reader, pThis, sizeof (DOSHeader), typeof (DOSHeader));\r
  78                         }\r
  79                 }\r
  80 \r
  81                 /// <summary>\r
  82                 /// </summary>\r
  83                 /// <param name="writer"></param>\r
  84                 public void Dump(TextWriter writer)\r
  85                 {\r
  86                         writer.WriteLine(\r
  87                                 "Number of pages     : {0}" + Environment.NewLine +\r
  88                                 "Bytes on last pages : {1}" + Environment.NewLine +\r
  89                                 "New header offset   : {2}" + Environment.NewLine +\r
  90                                 "Initial CS:IP       : {3}:{4}" + Environment.NewLine +\r
  91                                 "Initial SS:SP       : {5}:{6}" + Environment.NewLine +\r
  92                                 "Overlay number      : {7}" + Environment.NewLine,\r
  93                                 cp, cblp,\r
  94                                 lfanew + " (0x" + lfanew.ToString("X") + ")",\r
  95                                 cs.ToString("X"), ip.ToString("X"),\r
  96                                 ss.ToString("X"), sp.ToString("X"),\r
  97                                 ovno\r
  98                         );\r
  99                 }\r
 100 \r
 101                 /// <summary>\r
 102                 /// </summary>\r
 103                 /// <returns></returns>\r
 104                 public override string ToString()\r
 105                 {\r
 106                         StringWriter sw = new StringWriter();\r
 107                         Dump(sw);\r
 108                         return sw.ToString();\r
 109                 }\r
 110 \r
 111         }\r
 112 \r
 113 }\r
 114 \r