Jump table lookup method and device, electronic equipment and storage medium

Abstract

The embodiment of the invention provides a jump table searching method and device, electronic equipment and a storage medium, and relates to the technical field of electronics. The method comprises the steps of determining functions included in a target file, recognizing instructions in the functions according to an execution sequence of the instructions, recording a recognition sequence, searching and determining a target instruction corresponding to a register read by the dynamic jump instruction according to a reverse sequence of the recognition sequence when the dynamic jump instruction is recognized, and executing the dynamic jump instruction according to the target instruction. And obtaining relocation information of the target instruction and relocation information of other instructions from the target file, and determining a storage area of the jump table based on the relocation information of the target instruction and the relocation information of other instructions. When the jump table is searched, the target instruction is determined by combining the register used by the dynamic jump instruction and the execution sequence of the instruction, and the position of the jump table in the target file is determined according to the relocation information of the target instruction, so that the storage area of the jump table of the dynamic jump instruction in the target file can be rapidly determined.

Description

technical field [0001] The present invention relates to the field of electronic technology, and in particular, to a jump table search method, device, electronic device and storage medium. Background technique [0002] In the process of program development, after the source file of the program is developed using a high-level programming language, the source file needs to be converted into a relocatable object file by compiling and assembling operations. The object file includes the program's machine code and Data required for program execution. A program usually includes multiple functions. When the function includes a dynamic jump instruction, the object file will include the jump table of the dynamic jump instruction, and the jump table includes the jump address required by the dynamic jump instruction to jump. . [0003] Usually, after the relocatable object file is obtained, it is necessary to debug the relocatable object file. At this time, it is necessary to find the ...

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Problems solved by technology

[0004] In view of the above problems, an embodiment of the present invention is proposed to provide a jump table lookup method that overcomes the above problems or at least partially solves the above problems, so as to solve the difficult problem of finding and determining the jump table from the target file

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