[转载]Windows 2000 Loader

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Windows 2000 Loader
What Goes On Inside Windows 2000: Solving the Mysteries of the Loader
Russ Osterlund

SUMMARY DLLs are a cornerstone of the Windows operating system. Every day they quietly perform their magic, while programmers take them for granted. But for anyone who's ever stopped to think about how the DLLs on their system are loaded by the operating system, the whole process can seem like a great mystery. This article explores DLL loading and exposes what really goes on inside the Windows 2000 loader. Knowing how DLLs are loaded and where, and how the loader keeps track of them really comes in handy when debugging your applications. Here that process is explained in detail.
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ver since I first encountered a definition of dynamic link libraries in a description of the then-new operating system OS/2, the idea of DLLs has always fascinated me. This beautifully simple concept of modules that could be loaded and unloaded as needed with well-defined interfaces that outlined routines written beforehand and, perhaps by other programmers, was a powerful jolt to me because I was more accustomed to statically linked code in mainframe or MS-DOS