Assemblers rarely optimize beyond choosing the shortest form of an instruction or filling delay slots.īecause assembly is such a simple process, disassembly can often be just as simple. Having a good knowledge of these topics will help programmers to produce code that is more efficient and more secure.Īssemblers are significantly simpler than compilers, and are often implemented to simply translate the assembly code to binary machine code via one-to-one correspondence. One of the positive side effects of it is that the reader will gain a better understanding of the relation between machine code, assembly language, and high-level languages. Unfortunately, some malware writers use self-modifying code techniques (polymorphic camouflage, XOR encryption, scrambling), apparently to make it difficult to even detect that malware, much less disassemble it.ĭisassembling code has a large number of practical uses. We hope this leads us to figuring out how to block its harmful effects. We can figure out what a piece of malware does.New components can be built on top of old components to speed development time and reduce the need to rewrite large volumes of code.
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