Method for realizing dynamic loading of program and method and equipment for generating mapping file

Abstract

The invention discloses a method for realizing dynamic loading of a program in an embedded system. The method comprises the following steps: distributing an internal memory to a mapping file which isloaded based on an embedded system; reading the content of the mapping file into the distributed internal memory; after finishing reading in the content of the mapping file, executing an instruction code of the mapping file; and carrying out the remapping of a global / static variable in the mapping file according to an entry address appointed by an entry function so as to finish the dynamic loadingof the program. Correspondingly, the invention also discloses a method for generating the mapping file based on the embedded system and embedded equipment. By implementing the embodiment of the invention, the global / static variable in the mapping file is remapped so as to realize that the dynamic loading of the mapping file supports the global / static variable, solve the problem that execute exception can occur and cause failed loading when the global / static variable used by the mapping file is loaded and be more convenient for testing the generated mapping file.

Description

technical field [0001] The invention relates to the computer field, in particular to a method for realizing program dynamic loading in an embedded system, a method for generating an image file based on the embedded system and an embedded device. Background technique [0002] In the integrated development environment of ARM (Advanced RISC Machines, a general name for a class of microprocessors), the read-only code segment and constants of a program are called RO (ReadOnly) segments; readable and writable global variables and static variables are called RO (ReadOnly) segments. Called the RW (ReadWrite) segment; the variable to be initialized to zero in the RW segment is called the ZI (ZeroInit) segment. For embedded systems, the program image is stored in some non-volatile devices such as Flash memory, and at runtime, the RW segment in the program must be reloaded to a readable and writable memory card, such as RAM (Random Access Memory, random access memory), or in system fi...

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention is to provide a method for implementing dynamic loading of programs in an embedded system, a method for generating an image file based on an embedded system, and an embedded device that supports global / static variables and solves problems when loading involves When the global / static variables used in the image file are executed abnormally, the program will fail to load.

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