📄 csdn_文档中心_深入解析钩子和动态链接库（上）.htm
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</SPAN><I><SPAN
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style="COLOR: black; FONT-FAMILY: Verdana; FONT-SIZE: 10pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">DLL
</SPAN><SPAN
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style="COLOR: black; FONT-FAMILY: Verdana; FONT-SIZE: 10pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">
</SPAN><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 10pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">对于所有其它进程，这仅仅是一串比特位，并且如果你设法使用它作为地址，这个地址<I>在进行事件拦截的进程中</I>，是完全无用甚至导致程序崩溃。</SPAN><SPAN
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这个分开的地址空间的概念是一个难以掌握的概念。</SPAN><SPAN
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我们这里有三个进程。</SPAN><SPAN
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</SPAN><SPAN
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DLL </SPAN><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 10pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">有代码，数据，并且有一个共享的数据段。</SPAN><SPAN
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</SPAN><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 10pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">现在当钩子</SPAN><SPAN
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</SPAN><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 10pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">执行一次对进程</SPAN><SPAN
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style="COLOR: black; FONT-FAMILY: Verdana; FONT-SIZE: 10pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">A</SPAN><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 10pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">的事件拦截</SPAN><SPAN
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</SPAN><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 10pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">，</SPAN><SPAN
style="COLOR: #333333; FONT-FAMILY: 宋体; FONT-SIZE: 9pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial">系统自动把</SPAN><SPAN
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style="COLOR: #333333; FONT-FAMILY: Arial; FONT-SIZE: 9pt">DLL</SPAN><SPAN
style="COLOR: #333333; FONT-FAMILY: 宋体; FONT-SIZE: 9pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial">地址映射到该进程的私有空间，也就是进程的虚拟地址空间，而且也复制该</SPAN><SPAN
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style="COLOR: #333333; FONT-FAMILY: Arial; FONT-SIZE: 9pt">DLL</SPAN><SPAN
style="COLOR: #333333; FONT-FAMILY: 宋体; FONT-SIZE: 9pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial">的全局数据的一份拷贝到该进程空间。</SPAN><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 10pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">巧合地话，他们会被迁入到进程</SPAN><SPAN
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style="COLOR: black; FONT-FAMILY: Verdana; FONT-SIZE: 10pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">A
</SPAN><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 10pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">同样的<I>虚拟地址</I>。</SPAN><SPAN
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</SPAN><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 10pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">进程</SPAN><SPAN
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style="COLOR: black; FONT-FAMILY: Verdana; FONT-SIZE: 10pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">A</SPAN><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 10pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">有<I>它自己的私有的拷贝</I></SPAN><SPAN
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</SPAN><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 10pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">数据段，那么进程</SPAN><SPAN
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style="COLOR: black; FONT-FAMILY: Verdana; FONT-SIZE: 10pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">A
</SPAN><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 10pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">看见在</SPAN><FONT
size=3><SPAN lang=EN-US>"Data"</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中看见的完全是</SPAN></FONT><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 10pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">自己私有的</SPAN><SPAN
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</SPAN><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 10pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">，和无法影响其他进程的</SPAN><SPAN
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style="COLOR: black; FONT-FAMILY: Verdana; FONT-SIZE: 10pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">(</SPAN><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 10pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">或由其它进程影响</SPAN><SPAN
lang=EN-US
style="COLOR: black; FONT-FAMILY: Verdana; FONT-SIZE: 10pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">!).
</SPAN><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 10pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">但麻烦的是</SPAN><SPAN
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</SPAN><I><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 10pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">共享</SPAN></I><SPAN
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</SPAN><I><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 10pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">数据段</SPAN></I><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 10pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">，（显示红色的。）在你的进程和进程</SPAN><SPAN
lang=EN-US
style="COLOR: black; FONT-FAMILY: Verdana; FONT-SIZE: 10pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">A</SPAN><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 10pt; mso-ascii-font-family: Verdana; mso-hansi-font-family: Verdana; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">中指示到的是同样的内存页面。</SPAN><SPAN
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