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Added support for DOS MZ executables.

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Natalia Portillo
2017-10-03 13:26:49 +01:00
commit e84cf3cb41
6 changed files with 229 additions and 0 deletions
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64
exeinfo/MZ.cs Normal file
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using System;
using System.Runtime.InteropServices;
namespace exeinfo
{
public static class MZ
{
public const ushort Signature = 0x5A4D;
[StructLayout(LayoutKind.Sequential, Pack = 1)]
public struct Header
{
public ushort signature;
public ushort bytes_in_last_block;
public ushort blocks_in_file;
public ushort num_relocs;
public ushort header_paragraphs;
public ushort min_extra_paragraphs;
public ushort max_extra_paragraphs;
public ushort ss;
public ushort sp;
public ushort checksum;
public ushort ip;
public ushort cs;
public ushort reloc_table_offset;
public ushort overlay_number;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 4)]
public ushort[] reserved;
public ushort oem_id;
public ushort oem_info;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 10)]
public ushort[] reserved2;
public uint new_offset;
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
struct RelocationTableEntry
{
public ushort offset;
public ushort segment;
}
public static void PrintInfo(Header header)
{
Console.WriteLine("DOS MZ executable:");
Console.WriteLine("\tBlocks in file: {0}", header.blocks_in_file);
Console.WriteLine("\t{0} bytes used in last block", header.bytes_in_last_block == 0 ? 512 : header.bytes_in_last_block);
Console.WriteLine("\t{0} relocations present after the header", header.num_relocs);
Console.WriteLine("\t{0} paragraphs in header", header.header_paragraphs);
Console.WriteLine("\t{0} paragraphs of additional memory required", header.min_extra_paragraphs);
Console.WriteLine("\t{0} paragraphs of additional memory requested", header.max_extra_paragraphs);
Console.WriteLine("\tSegment address for SS: {0:X4}h", header.ss);
Console.WriteLine("\tInitial value of SP: {0:X4}h", header.sp);
Console.WriteLine("\tInitial value of IP: {0:X4}h", header.ip);
Console.WriteLine("\tInitial value of CS: {0:X4}h", header.cs);
Console.WriteLine("\tOffset to relocation table: {0}", header.reloc_table_offset);
Console.WriteLine("\tFile contains {0} overlays", header.overlay_number);
Console.WriteLine("\tFile checksum: 0x{0:X4}", header.checksum);
Console.WriteLine("\tOEM ID: {0}", header.oem_id);
Console.WriteLine("\tOEM information: 0x{0:X4}", header.oem_info);
Console.WriteLine("\tOffset to new header: {0}", header.new_offset);
}
}
}

42
exeinfo/Program.cs Normal file
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using System;
using System.IO;
using System.Runtime.InteropServices;
namespace exeinfo
{
class MainClass
{
static MZ.Header mzHdr;
public static void Main(string[] args)
{
if(args.Length != 1)
{
Console.WriteLine("exeinfo version 0.1 © 2017 Natalia Portillo");
Console.WriteLine("Usage: exeinfo file.exe");
return;
}
FileStream exeFs = File.Open(args[0], FileMode.Open, FileAccess.Read);
bool recognized = false;
byte[] buffer = new byte[Marshal.SizeOf(typeof(MZ.Header))];
exeFs.Read(buffer, 0, buffer.Length);
IntPtr hdrPtr = Marshal.AllocHGlobal(buffer.Length);
Marshal.Copy(buffer, 0, hdrPtr, buffer.Length);
mzHdr = (MZ.Header)Marshal.PtrToStructure(hdrPtr, typeof(MZ.Header));
Marshal.FreeHGlobal(hdrPtr);
if(mzHdr.signature == MZ.Signature)
{
recognized = true;
MZ.PrintInfo(mzHdr);
}
if (!recognized)
Console.WriteLine("Executalbe format not recognized");
}
}
}

26
exeinfo/Properties/AssemblyInfo.cs Normal file
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using System.Reflection;
using System.Runtime.CompilerServices;
// Information about this assembly is defined by the following attributes.
// Change them to the values specific to your project.
[assembly: AssemblyTitle("exeinfo")]
[assembly: AssemblyDescription("")]
[assembly: AssemblyConfiguration("")]
[assembly: AssemblyCompany("Claunia.com")]
[assembly: AssemblyProduct("")]
[assembly: AssemblyCopyright("Copyright © Claunia.com")]
[assembly: AssemblyTrademark("")]
[assembly: AssemblyCulture("")]
// The assembly version has the format "{Major}.{Minor}.{Build}.{Revision}".
// The form "{Major}.{Minor}.*" will automatically update the build and revision,
// and "{Major}.{Minor}.{Build}.*" will update just the revision.
[assembly: AssemblyVersion("1.0.*")]
// The following attributes are used to specify the signing key for the assembly,
// if desired. See the Mono documentation for more information about signing.
//[assembly: AssemblyDelaySign(false)]
//[assembly: AssemblyKeyFile("")]

40
exeinfo/exeinfo.csproj Normal file
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<?xml version="1.0" encoding="utf-8"?>
<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<PropertyGroup>
<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
<Platform Condition=" '$(Platform)' == '' ">x86</Platform>
<ProjectGuid>{504F0A15-25DC-42B1-81FE-BA22A8EF24B5}</ProjectGuid>
<OutputType>Exe</OutputType>
<RootNamespace>exeinfo</RootNamespace>
<AssemblyName>exeinfo</AssemblyName>
<TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
</PropertyGroup>
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|x86' ">
<DebugSymbols>true</DebugSymbols>
<DebugType>full</DebugType>
<Optimize>false</Optimize>
<OutputPath>bin\Debug</OutputPath>
<DefineConstants>DEBUG;</DefineConstants>
<ErrorReport>prompt</ErrorReport>
<WarningLevel>4</WarningLevel>
<ExternalConsole>true</ExternalConsole>
<PlatformTarget>x86</PlatformTarget>
</PropertyGroup>
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|x86' ">
<Optimize>true</Optimize>
<OutputPath>bin\Release</OutputPath>
<ErrorReport>prompt</ErrorReport>
<WarningLevel>4</WarningLevel>
<ExternalConsole>true</ExternalConsole>
<PlatformTarget>x86</PlatformTarget>
</PropertyGroup>
<ItemGroup>
<Reference Include="System" />
</ItemGroup>
<ItemGroup>
<Compile Include="Program.cs" />
<Compile Include="Properties\AssemblyInfo.cs" />
<Compile Include="MZ.cs" />
</ItemGroup>
<Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
</Project>