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6.3.5 Some Instructions are Reserved for Operating System 为操作系统保留的一些指令 Instructions that have the power to affect the protection mechanism or to influ 阅读全文
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6.3.4 Gate Descriptors Guard Procedure Entry Points 门描述符守卫程序入口 To provide protection for control transfers among executable segments at different priv 阅读全文
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6.3.2 Restricting Access to Data 数据访问的约束 To address operands in memory, an 80386 program must load the selector of a data segment into a data-segment 阅读全文
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6.3 Segment-Level Protection 段级保护 All five aspects of protection apply to segment translation: 段转换时会提供以下5个方面的保护： The segment is the unit of protection 阅读全文
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Chapter 6 Protection 第六章 保护 6.1 Why Protection? 为什么要保护？ The purpose of the protection features of the 80386 is to help detect and identify bugs. The 8 阅读全文
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5.3 Combining Segment and Page Translation 联合使用段与分页转换 Figure 5-12 combines Figure 5-2 and Figure 5-9 to summarize both phases of the transformation fr 阅读全文
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5.2 Page Translation 页转换 In the second phase of address transformation, the 80386 transforms a linear address into a physical address. This phase of a 阅读全文
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5.1 Segment Translation 段转换 Figure 5-2 shows in more detail how the processor converts a logical address into a linear address. 图5-2展示了处理器将一个逻辑地址转换为线性 阅读全文
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Chapter 5 Memory Management 内存管理 The 80386 transforms logical addresses (i.e., addresses as viewed by programmers) into physical address (i.e., actual 阅读全文
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4.2 Systems Instructions 系统指令 Systems instructions deal with such functions as: 系统指令具有以下功能： 验证指印参数（参见第6章） ARPL> -- Adjust RPL RPL= request provilege l 阅读全文