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The Design and Implementation of Dynamic Load Function of Delta OS

Author: YuanHaiDong
Tutor: XiongGuangZe
School: University of Electronic Science and Technology
Course: Computer Applications
Keywords: Application of dynamic loading Relocation table Embedded real-time operating system
CLC: TP316
Type: Master's thesis
Year: 2002
Downloads: 98
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Abstract


With the increasing development of computer and information technology , personal digital information processing equipment (forexample, PDA) has been increasingly popular and play an increasingly large role in people's daily life and work . Currently on the market , most of the high-end PDA class devices with the function of the dynamic loading of applications , so that users can easily download new applications to run in the system , which broadens the function and purpose of the PDA class devices . The comparative analysis in this article based Java application dynamic loading as well as embedded Linux, PalmOS and other mainstream embedded operating system applications dynamically load the realization of the principle , proposed and implemented on the basis of one for Delta OS ~ 1 embedded operating system applications that take advantage of the relocation table mechanism dynamically loaded programs , with the previously mentioned dynamic loading program compared with a simple, less impact on existing operating systems , and the implementation of high efficiency , low hardware requirements . Installed Delta OS system with dynamic loading function embedded devices can easily upgrade the system and add new applications to the system running the application or delete system already greatly expand their functions and uses . In this article , we have a demo version of the software under dynamic loading scheme proposed earlier , is used to verify the feasibility of the design . The presentation software to achieve most of the functionality of the program design , slightly modified it can be ported to run in a real system . According to the information at our disposal , no similar work . The application dynamically loaded technology involved in many aspects of the operating system , applications, file formats , serial port ( or other ) data communications . Those elements are the in-depth analysis and research, the realization of a dynamically loaded programs and participate in the preparation of a specific code testing ( of the total amount of code 2 / 5 strong ) , the final completion of the dynamic loading function of a software demo model . This work to improve the functionality of the of Delta OS operating system , improve the market competitiveness with other embedded operating systems at home and abroad , and has important commercial value .

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