说明：  ARM汇编程序分析过程中，比较难理解的是他的伪操作、宏指令和伪指令。本文是结合44B0X引导程序中出现伪操作、宏指令和伪指令进行总结，便于进一步分析44B0X的引导。
(ARM assembler analysis, comparison is difficult to understand him pseudo-operations, macros and pseudo-instruction. This article is a combination of boot 44B0X appear pseudo-operations, macros and pseudo-instruction to sum up for further analysis 44B0X guidance.)