勿把字符数组当字符串
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汇编器的执行过程

皮贝贝 posted @ 2009年10月09日 17:34 in 未分类 with tags 汇编器 , 2087 阅读

一半而言,汇编器大多采用两遍扫描法。两遍是指对源文件进行两次读取分析。

1. 第一遍是收集符号,之所以这样,是因为汇编语言中有时会出现前向引用,即在声明这个标号前就被引用。所以,在第一遍扫描时,把所有的符号地址都记录下来,方便第二遍处理指令时遇到符号 的查找。

2. 第二遍是分析处理指令,在此过程中,遇到符号,便到第一遍收集的符号表中查找即可。

 

 

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boardmodelpaper.com 说:
2024年1月27日 17:30

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