This is important because the kernel and user application occupy different protectedaddress Spaces.
这点非常重要,因为内核和用户空间的应用程序使用的是不同的保护地址空间。
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The problem is that this works when the CPU is in 32-bit VPAM (Virtual ProtectedAddress Mode), which is what an i386 OS USES, but not when the CPU is in the so-called "Long Mode" that AMD introduced.
In this article, I will address the confidentiality aspect of data security: Making sure protected data can only be accessed by authorized people or systems.