控制Wow64重定向

参考:https://blog.csdn.net/karlxzy/article/details/42170419

 

在默认情况下，64位环境运行32位程序，会启用重定向，

比如 调用CreateFile时，系统会把system32文件夹重定向到Syswow64等等。

但是有些时候需要访问system32文件夹的时候就需要关闭重定向。

MS已经提供了一组函数用来控制重定向：

Wow64EnableWow64FsRedirection
Wow64DisableWow64FsRedirection
Wow64RevertWow64FsRedirection

用法在MSDN里面有DEMO：

 

1.  
   #define _WIN32_WINNT 0x0501
2.  
   #include <Windows.h>
3.  
    
4.  
   void main()
5.  
   {
6.  
   HANDLE hFile = INVALID_HANDLE_VALUE;
7.  
   PVOID OldValue = NULL;
8.  
    
9.  
   // Disable redirection immediately prior to the native API
10.  
    // function call.
11.  
    if( Wow64DisableWow64FsRedirection(&OldValue) )
12.  
    {
13.  
    // Any function calls in this block of code should be as concise
14.  
    // and as simple as possible to avoid unintended results.
15.  
    hFile = CreateFile(TEXT("C:\\Windows\\System32\\Notepad.exe"),
16.  
    GENERIC_READ,
17.  
    FILE_SHARE_READ,
18.  
    NULL,
19.  
    OPEN_EXISTING,
20.  
    FILE_ATTRIBUTE_NORMAL,
21.  
    NULL);
22.  
     
23.  
    // Immediately re-enable redirection. Note that any resources
24.  
    // associated with OldValue are cleaned up by this call.
25.  
    if ( FALSE == Wow64RevertWow64FsRedirection(OldValue) )
26.  
    {
27.  
    // Failure to re-enable redirection should be considered
28.  
    // a criticial failure and execution aborted.
29.  
    return;
30.  
    }
31.  
    }
32.  
     
33.  
    // The handle, if valid, now can be used as usual, and without
34.  
    // leaving redirection disabled.
35.  
    if( INVALID_HANDLE_VALUE != hFile )
36.  
    {
37.  
    // Use the file handle
38.  
    }
39.  
    }