检查非托管的DLL是32位还是64位？检查非托管的DLL是32位还是64位？(Check if un

我怎么能告诉编程在C＃中，如果非托管 DLL文件是x86或x64？

Answer 1:

请参阅规格。这是一个基本的实现：

public static MachineType GetDllMachineType(string dllPath)
{
    // See http://www.microsoft.com/whdc/system/platform/firmware/PECOFF.mspx
    // Offset to PE header is always at 0x3C.
    // The PE header starts with "PE\0\0" =  0x50 0x45 0x00 0x00,
    // followed by a 2-byte machine type field (see the document above for the enum).
    //
    FileStream fs = new FileStream(dllPath, FileMode.Open, FileAccess.Read);
    BinaryReader br = new BinaryReader(fs);
    fs.Seek(0x3c, SeekOrigin.Begin);
    Int32 peOffset = br.ReadInt32();
    fs.Seek(peOffset, SeekOrigin.Begin);
    UInt32 peHead = br.ReadUInt32();

    if (peHead!=0x00004550) // "PE\0\0", little-endian
        throw new Exception("Can't find PE header");

    MachineType machineType = (MachineType) br.ReadUInt16();
    br.Close();
    fs.Close();
    return machineType;
}

所述MachineType枚举定义为：

public enum MachineType : ushort
{
    IMAGE_FILE_MACHINE_UNKNOWN = 0x0,
    IMAGE_FILE_MACHINE_AM33 = 0x1d3,
    IMAGE_FILE_MACHINE_AMD64 = 0x8664,
    IMAGE_FILE_MACHINE_ARM = 0x1c0,
    IMAGE_FILE_MACHINE_EBC = 0xebc,
    IMAGE_FILE_MACHINE_I386 = 0x14c,
    IMAGE_FILE_MACHINE_IA64 = 0x200,
    IMAGE_FILE_MACHINE_M32R = 0x9041,
    IMAGE_FILE_MACHINE_MIPS16 = 0x266,
    IMAGE_FILE_MACHINE_MIPSFPU = 0x366,
    IMAGE_FILE_MACHINE_MIPSFPU16 = 0x466,
    IMAGE_FILE_MACHINE_POWERPC = 0x1f0,
    IMAGE_FILE_MACHINE_POWERPCFP = 0x1f1,
    IMAGE_FILE_MACHINE_R4000 = 0x166,
    IMAGE_FILE_MACHINE_SH3 = 0x1a2,
    IMAGE_FILE_MACHINE_SH3DSP = 0x1a3,
    IMAGE_FILE_MACHINE_SH4 = 0x1a6,
    IMAGE_FILE_MACHINE_SH5 = 0x1a8,
    IMAGE_FILE_MACHINE_THUMB = 0x1c2,
    IMAGE_FILE_MACHINE_WCEMIPSV2 = 0x169,
}

我只需要这三个，但我包括他们所有的完整性。最终64位检查：

// Returns true if the dll is 64-bit, false if 32-bit, and null if unknown
public static bool? UnmanagedDllIs64Bit(string dllPath)
{
    switch (GetDllMachineType(dllPath))
    {
        case MachineType.IMAGE_FILE_MACHINE_AMD64:
        case MachineType.IMAGE_FILE_MACHINE_IA64:
            return true;
        case MachineType.IMAGE_FILE_MACHINE_I386:
            return false;
        default:
            return null;
    }
}

Answer 2:

使用Visual Studio的命令提示符下，DUMPBIN /头dllname.dll工作过。在我的机器输出的开头说：

FILE HEADER VALUES
8664 machine (x64)
5 number of sections
47591774 time date stamp Fri Dec 07 03:50:44 2007

Answer 3:

更简单：检查出System.Reflection.Module类。它包括GetPEKind方法，它返回2个枚举描述的码的类型和CPU目标。没有更多的十六进制！

（这个非常丰富的职位的其余无耻地从复制http://www.developersdex.com/vb/message.asp?p=2924&r=6413567 ）

示例代码：

Assembly assembly = Assembly.ReflectionOnlyLoadFrom(@"<assembly Path>");
PortableExecutableKinds kinds;
ImageFileMachine imgFileMachine;
assembly.ManifestModule.GetPEKind(out kinds, out imgFileMachine);

PortableExecutableKinds可以用来检查什么样的组装。它有5个值：

ILONLY：可执行仅包含Microsoft中间语言（MSIL），并且因此相对于32位或64位平台中性的。

NotAPortableExecutableImage：该文件不是可移植可执行（PE）文件格式。

PE32Plus：可执行文件需要一个64位平台。

Required32Bit：可执行可以一个32位的平台上运行，或者在64位的平台上在32位Windows上的Windows（WOW）环境。

Unmanaged32Bit：该可执行文件包含纯非托管代码。

以下是链接：

Module.GetPEKind方法： http://msdn.microsoft.com/en-us/library/system.reflection.module.getpekind.aspx

PortableExecutableKinds枚举： http://msdn.microsoft.com/en-us/library/system.reflection.portableexecutablekinds(VS.80).aspx

ImageFileMachine枚举： http://msdn.microsoft.com/en-us/library/system.reflection.imagefilemachine.aspx

Answer 4:

取而代之的Assembly.LoadFile ，使用Assembly.ReflectionOnlyLoadFrom 。这将让你解决“坏图像格式”例外。

Answer 5:

I know it has been a while since this was updated. I was able to get away with the "Bad Image Format" exceptions by loading the file into it's own AppDomain.

        private static (string pkName, string imName) FindPEKind(string filename)
    {
        // some files, especially if loaded into memory
        // can cause errors. Thus, load into their own appdomain
        AppDomain tempDomain = AppDomain.CreateDomain(Guid.NewGuid().ToString());
        PEWorkerClass remoteWorker =
            (PEWorkerClass)tempDomain.CreateInstanceAndUnwrap(
                typeof(PEWorkerClass).Assembly.FullName,
                typeof(PEWorkerClass).FullName);

        (string pkName, string imName) = remoteWorker.TryReflectionOnlyLoadFrom_GetManagedType(filename);

        AppDomain.Unload(tempDomain);
        return (pkName, imName);
    }

At this point, I do the following:

        public (string pkName, string imName) TryReflectionOnlyLoadFrom_GetManagedType(string fileName)
    {
        string pkName;
        string imName;
        try
        {
            Assembly assembly = Assembly.ReflectionOnlyLoadFrom(assemblyFile: fileName);
            assembly.ManifestModule.GetPEKind(
                peKind: out PortableExecutableKinds peKind,
                machine: out ImageFileMachine imageFileMachine);

            // Any CPU builds are reported as 32bit.
            // 32bit builds will have more value for PortableExecutableKinds
            if (peKind == PortableExecutableKinds.ILOnly && imageFileMachine == ImageFileMachine.I386)
            {
                pkName = "AnyCPU";
                imName = "";
            }
            else
            {
                PortableExecutableKindsNames.TryGetValue(
                    key: peKind,
                    value: out pkName);
                if (string.IsNullOrEmpty(value: pkName))
                {
                    pkName = "*** ERROR ***";
                }

                ImageFileMachineNames.TryGetValue(
                    key: imageFileMachine,
                    value: out imName);
                if (string.IsNullOrEmpty(value: pkName))
                {
                    imName = "*** ERROR ***";
                }
            }

            return (pkName, imName);
        }
        catch (Exception ex)
        {
            return (ExceptionHelper(ex), "");
        }
    }

Running this against my Widows\Assembly directory gives me zero errors with over 3600 files processed. note: I use a dictionary to load the values being returned.

I hope it helps. YMMV

文章来源: Check if unmanaged DLL is 32-bit or 64-bit?