32位和64位DLL如何链接到相同的C：\ system32 \ kernel32.DLL？

Question

我确定64位DLL无法链接到32位DLL。

Answer 1

Wow64 has a file redirector. It has the same named dlls but are stored in the appropriate location. The concept is explained at http://msdn.microsoft.com/en-us/library/aa384187(v=vs.85).aspx

The %windir%\\System32 directory is reserved for 64-bit applications. Most DLL file names were not changed when 64-bit versions of the DLLs were created, so 32-bit versions of the DLLs are stored in a different directory. WOW64 hides this difference using a file system redirector.

In most cases, whenever a 32-bit application attempts to access %windir%\\System32, the access is redirected to %windir%\\SysWOW64. Access to %windir%\\lastgood\\system32 is redirected to %windir%\\lastgood\\SysWOW64. Access to %windir%\\regedit.exe is redirected to %windir%\\SysWOW64\\regedit.exe.