kernel instruction set 核心指令集
As a consequence, the instruction set contains mostly arithmetic and branch operations but none that resemble kernel mode instructions of the PPE.
结果是指令集中包含大部分算术操作和转移操作，但是并不包含PPE中的那种内核模式指令。
What you'll find is a variation in design and usage of the available kernel APIs, but each is useful for instruction or as a starting point for a new device driver.
在这里可以找到的是各种设计的变化以及对可用内核api的使用，但是所学到的每一点都会非常有用，都可以作为新设备驱动程序的起点。
You set some registers and issue a system call instruction (or an interrupt) and have the kernel code called directly from the trap handler.
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。
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