Class loading method for starting Java Processor

Abstract

The invention discloses a class loading method when starting Java processor, the steps are: a) initialize chips; 2) initiate byte code read module; 3) select and set up the loading path; 4) load the loader for user classes; 5) load the operating system. The method references the design of common PC BIOS. When the chips are made, the start code is programmed in the chips. When the system starts, the code is run automatically to implement initialization function for peripherals, while building the system class loader for Java Virtual Machine and loading the Java embedded operating systems or applications stored as byte code files form peripheral storage devices or network. The invention makes the development process on Java-based processor similar to other embedded Java applications, which is convenience to the chip users and software developers. What's more, all the Java byte code following the Java standard can run on the chips, improving the universality and taking advantage of the portability of Java.

Description

technical field [0001] The invention belongs to the field of embedded processor design, and in particular relates to a class loading method when a JavaProcessor is started. Background technique [0002] At present, the class loading function in the Java Processor is mainly realized through software simulation in the development host, and the software is run on the development host, and according to the compiled Java bytecode file, type verification, memory allocation, symbol analysis, initialization of variables, etc. The class loading operation generates a memory image file when a Java program is executed, and then downloads the image file to the system memory and runs it directly. [0003] This method uses the development host to implement a part of the Java program running process, which is incompatible with the Java standard regulations, making the Java software development process cumbersome, except that it must run a conventional Java compiler to compile the Java high-...

AI Technical Summary

Problems solved by technology

[0003] This method uses the development host to implement a part of the Java program running process, which is incompatible with the Java standard regulations, making the Java software development process cumbersome, except that it must run a conventional Java compiler to compile the Java high-level language source code into bytes In addition to code files, a "secondary compilation" process must be performed to generate memory image files during execution

The image file generated by this method cannot be transplanted to other Java platforms, and the dependence of the "secondary compilation" software on the platform significantly weakens the portability of Java technology.

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