检查非托管DLL是32位还是64位？

本文介绍了检查非托管DLL是32位还是64位？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

如何以编程方式告诉在C＃中，如果一个非托管的DLL文件是x86或x64？

How can I programmatically tell in C# if an unmanaged DLL file is x86 or x64?

推荐答案

参考的规范的。这里有一个基本的实现：

Refer to the specifications. Here's a basic implementation:

public static MachineType GetDllMachineType(string dllPath) { // See www.microsoft/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; }

在 MachineType 枚举的定义是：

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。最后的64位检查：

I only needed three of these, but I included them all for completeness. Final 64-bit check:

// 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; } }