ELF 기반 응용프로그램을 위한 핫패칭 플랫폼 설계

Abstract

Software is ubiquitous in modern life, and often requires frequent updates to improve performance and reliability. Typically, a general update process is performed after terminating a software program, but such updates are not applicable to applications that require non-disruptive service, such as networks and satellites. To address this issue, network service providers often provide technology referred to as “in-service software upgrades.” This technology performs continuous updates without halting service. However, such updates require additional devices or facilities, meaning system structure becomes more complicated and additional economic costs are incurred. In this paper, we present the design and implementation of a hot-patching platform for executable and linkable format binary programs based on ARM and Intel processors to add or update the functions necessary to provide uninterrupted services. Experiments were conducted by applying the proposed platform to network service applications. As a result, it was confirmed that the end user could not notice that the software update of the service was in progress. Also, we looked at the scenarios related to the security of firmware software in the IoT environment. © ICROS 2021.