Anatomy of the Linux kernel--转

The Linux kernel can be further divided into three gross levels. At the top is the system call interface,which implements the basic functions such as?read?and?write. Below the system call interface is the kernel code,which can be more accurately defined as the architecture-independent kernel code. This code is common to all of the processor architectures supported by Linux. Below this is the architecture-dependent code,which forms what is more commonly called a BSP (Board Support Package). This code serves as the processor and platform-specific code for the given architecture.

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