Disassembler instruction matching processing method

Abstract

The invention discloses a method for processing instruction matching of a disassembler. A user represents the description of an instruction format on an instruction set manual as an 'instruction format representation string', and establishes the correlation of the 'instruction format expression string' and an 'instruction processing callback function'; the disassembler extends the 'instruction format representation string' as an 'expanded binary string of the instruction format representation string', further to establish the correlation of the 'expanded binary string of the instruction format representation string' and the 'instruction processing callback function'; when the disassembler disassembles, an input binary stream is matched with the 'expanded binary string of the instruction format representation string'; if the matching is successful, the corresponding 'instruction format expression string' is called; otherwise, the input string is not an effective instruction string. The representation method of the instruction format is intuitive and brief; the unfolding process of the representation is fixed without respectively compiling aiming at different platforms; and the utilization of the information provided by the presentation can conveniently quote an input string in the callback function.

Description

technical field [0001] The invention relates to a disassembler, in particular to a processing method for disassembler instruction matching. Background technique [0002] Disassembly is the reverse process of assembly, that is, a program that converts binary code into an assembly language representation of a functionally equivalent target platform. The disassembler is a tool to realize the disassembly function. A disassembler is an indispensable tool in reverse engineering. [0003] Disassemblers are processor-dependent in nature. Processors from different manufacturers or different instruction families may have completely different assembly instruction sets. Even processors of the same instruction family from the same manufacturer may have instruction set extensions. Therefore, corresponding disassemblers must be developed for different platforms. [0004] An important reference for developing a disassembler is the instruction set reference manual published by the proce...

AI Technical Summary

Problems solved by technology

The workload of manually writing matching codes and processing functions is huge

[0005] However, comparing different instruction set reference manuals, it can be found that although the instruction sets are very different, the format for describing instructions is almost the same

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