维基百科的解释
In computer science, execute in place (XIP) is a method of executing programs directly from long term storage rather than copying it into RAM. It is an extension of using shared memory to reduce the total amount of memory
required.
在计算机研究中,XIP是一种直接在存储器中,而不是将程序复制到RAM中执行程序的方法。一种利用共享内存减少内存需求的扩展。即,就地执行。