C ++ / CLI：使用LoadLibrary + GetProcAddress与exe [英] C++/CLI: Use LoadLibrary + GetProcAddress with an exe

问题描述

到目前为止，我有一些插件机制，其中我加载dll使用LoadLibrary和GetProcAddress创建一个具体的对象，并返回一个公共接口。这工作正常，直到我决定其中一个dll应该是一个exe。

LoadLibrary的文档说，它可以用于exe的，所以我给了它一枪。 exe得到加载没有错误，GetProcAddress。但是当我试图调用我的具体对象的构造函数，我得到一个访问冲突。

我想这将发生，因为加载一个exe不加载其使用的所有dll。所以我试图加载他们使用LoadLibrary，但我有同样的错误。

$ b p> 接口* MCFactory :: LoadInstanceFromAssembly（String ^ concreteAssemblyName，String ^ param）{
string fullPathToAssembly =;
fullPathToAssembly + = FileSystem :: GetPathToProgramDirectory（）;
fullPathToAssembly + =\\+ marshal_as< string>（concreteAssemblyName）;

MODULE hDLL = AssemblyLoader :: GetInstance（）。LoadAssembly（fullPathToAssembly）;

接口* pObject = NULL;
if（hDLL！= NULL）{
t_pCreateInstanceFunction pCreateInstanceFunction =
（t_pCreateInstanceFunction）:: GetProcAddress（hDLL，CREATE_INSTANCE_FUNCTION_NAME.c_str

if（pCreateInstanceFunction！= NULL）{
//是，这个程序集公开了我们需要的函数
//调用函数创建对象
pObject = （* pCreateInstanceFunction）（marshal_as< string>（param））;
}
}
return pObject;
}


（AssemblyLoader :: GetInstance（）。LoadAssembly只是一个包装器:: LoadLibrary）

解决方案

可以。

http://www.codeproject.com/Articles/1045674/Load-EXE -as-DLL-Mission-Possible

这个想法是修补IAT，然后调用CRT。当然，EXE必须可重定位，默认情况下（ASLR）。

Up until now, I had some sort of plugin mechanism in which I loaded dlls using LoadLibrary and GetProcAddress to create a concrete object and return a common interface. This worked fine until I decided that one of the dlls should be an exe.

LoadLibrary's documentation says that it can be used for exe's as well, so I gave it a shot. The exe gets loaded without errors, as GetProcAddress. But when I try to call my concrete object's constructor, I get an access violation.

I thought this would happen because loading an exe does not load all the dlls it uses. So I tried loading them using LoadLibrary, but I got the same error. Any advice on this?

Here's my code (mixed C++/CLI):

Interface* MCFactory::LoadInstanceFromAssembly( String ^ concreteAssemblyName, String ^ param ){
    string fullPathToAssembly = "";
    fullPathToAssembly += FileSystem::GetPathToProgramDirectory();
    fullPathToAssembly += "\\" + marshal_as<string>(concreteAssemblyName);

    MODULE hDLL = AssemblyLoader::GetInstance().LoadAssembly( fullPathToAssembly ); 

    Interface* pObject = NULL;
    if (hDLL != NULL){
        t_pCreateInstanceFunction pCreateInstanceFunction =
            (t_pCreateInstanceFunction) ::GetProcAddress (hDLL, CREATE_INSTANCE_FUNCTION_NAME.c_str());

        if ( pCreateInstanceFunction != NULL ){
            //Yes, this assembly exposes the function we need
            //Invoke the function to create the object
            pObject = (*pCreateInstanceFunction)( marshal_as<string>(param) );              
        }
    }           
    return pObject;
}

(AssemblyLoader::GetInstance().LoadAssembly is just a wrapper for ::LoadLibrary)

解决方案

It is possible.

http://www.codeproject.com/Articles/1045674/Load-EXE-as-DLL-Mission-Possible

The idea is to patch the IAT, then call the CRT. Of course, the EXE must be relocatable, and by default (ASLR) it is.

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