| 1. | This default ldt segment descriptor is stored in the gdt
这个默认ldt段描述符存储在gdt中。 |
| 2. | By default it contains a null segment descriptor
默认情况下，其中会包含一个空的段描述符。 |
| 3. | Linux uses following segments descriptors
Linux使用以下段描述符： |
| 4. | The corresponding segment descriptor stored in the gdt has following values
存储在gdt中的对应段描述符的值如下： |
| 5. | Each segment descriptor is eight bytes long and represents a single segment in memory
每个段描述符长8个字节，表示内存中的一个段。 |
| 6. | A 13 - bit index that identifies the corresponding segment descriptor entry contained in the gdt or ldt
一个13位的索引，用来标识gdt或ldt中包含的对应段描述符条目 |
| 7. | This enables linux to use a limited number of segment descriptors , therefore all descriptors can be kept in the gdt
这使linux所用的段描述符数量受限，从而可将所有描述符都保存在gdt之中。 |
| 8. | In addition to these segment descriptors , the gdt contains two more segment descriptors for each process created - the tss and ldt segments
除了这些段描述符之外， gdt还包含了另外两个用于每个创建的进程的段描述符tss和ldt段。 |
| 9. | Each time a segment selector is loaded on to segment registers , the corresponding segment descriptor is loaded from memory into a matching non - programmable cpu register
每次将段选择器加载到段寄存器中时，对应的段描述符都会从内存加载到相匹配的不可编程cpu寄存器中。 |
| 10. | Since a segment descriptor is eight bytes long , its relative address inside the gdt or ldt is obtained by multiplying the most significant 13 bits of segment selector by 8
由于一个段描述符的大小是8个字节，因此它在gdt或ldt中的相对地址可以这样计算：段选择器的高13位乘以8 。 |
