每次为程序指令或数据处理内存位置时，都需要将虚拟地址转换成物理(或实际)内存地址。

Every time a memory location is addressed for program instructions or data, a virtual address is translated into a physical or real memory address.

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你可以设置一些寄存器，并发出一个系统调用指令(或中断)，并由陷阱处理程序直接调用内核代码。

You set some registers and issue a system call instruction (or an interrupt) and have the kernel code called directly from the trap handler.

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UDDE 可以支持 标准属性 或允许包含 XSLT 指令，这由实现处理程序的厂商决定。

UDDEs may support the standard attributes or allow XSLT instructions as children, at the discretion of the vendor implementing the processor.

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