用特殊的系统调用(即对UNIX内核的请求)分配和释放内存并设置权限；通过一般的读写操作读写内存段中的数据。

Special system calls, or requests to the UNIX kernel, allocate and free the memory and set permissions; common read and write operations put and get data from the region.

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第1段(0x0)用于内核文本和数据。

Segment one (0x0) is reserved for kernal text and data.

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第 1 段（0x0）用于内核文本和数据。

The first segment (0x0) is used for kernal text and data.

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