"Code is data" doesn't refer to self-modifying code. It means that the source code of the program is a data structure, whose processing can be customized in th

"Code is data" doesn't refer to self-modifying code. It means that the source code of the program is a data structure, whose processing can be customized in the programming language. In machine language, you do not have access to customize the assembly language. For that, you work in a different language: the macro language of the assembler.