本文關(guān)鍵詞：aCoral可執(zhí)行文件加載與線程交互機(jī)制的研究與設(shè)計(jì)　出處：《電子科技大學(xué)》2012年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 任務(wù)加載 任務(wù)交互 aCoral 嵌入式系統(tǒng) 系統(tǒng)調(diào)用

【摘要】：隨著嵌入式硬件技術(shù)的不斷進(jìn)步，嵌入式系統(tǒng)也由單一功能的工控設(shè)備開始向集成多種功能的復(fù)合型設(shè)備發(fā)展。目前嵌入式系統(tǒng)中采用操作系統(tǒng)與應(yīng)用任務(wù)統(tǒng)一編譯方式不夠靈活的缺點(diǎn)日益顯現(xiàn)。鑒于此點(diǎn)，必須采用某種機(jī)制將嵌入式操作系統(tǒng)與應(yīng)用任務(wù)分別處理。這種機(jī)制即是嵌入式平臺下的任務(wù)加載機(jī)制。 本文在深入研究PC平臺任務(wù)加載機(jī)制的基礎(chǔ)上，研究和閱讀了多種可執(zhí)行文件的格式說明，通過總結(jié)設(shè)計(jì)出嵌入式平臺下的可執(zhí)行應(yīng)用任務(wù)格式，任務(wù)加載器，以及內(nèi)核系統(tǒng)調(diào)用。同時(shí)，深入研究了任務(wù)之間的交互機(jī)制，并針對存在任務(wù)加載機(jī)制下任務(wù)的特點(diǎn)，設(shè)計(jì)了自旋鎖、互斥鎖、信號量，消息、讀寫鎖等任務(wù)交互工具。在研究與設(shè)計(jì)的基礎(chǔ)上，本文最終在多核實(shí)時(shí)嵌入式操作系統(tǒng)aCoral對任務(wù)加載和任務(wù)交互工具進(jìn)行了實(shí)現(xiàn)。 嵌入式平臺的任務(wù)加載機(jī)制包括可執(zhí)行任務(wù)格式、任務(wù)加載器、內(nèi)核系統(tǒng)調(diào)用三個(gè)部分。其中可執(zhí)行任務(wù)格式包括函數(shù)庫的設(shè)計(jì)與鏈接方式、可執(zhí)行任務(wù)文件生成兩個(gè)方面。內(nèi)核系統(tǒng)調(diào)用包括內(nèi)核中的系統(tǒng)調(diào)用響應(yīng)和系統(tǒng)調(diào)用庫的設(shè)計(jì)兩個(gè)方面。任務(wù)交互機(jī)制的設(shè)計(jì)主要是任務(wù)交互工具的設(shè)計(jì)，任務(wù)交互工具包括自旋鎖、互斥鎖、信號量，消息、讀寫鎖的設(shè)計(jì)。 本文先介紹了驗(yàn)證平臺aCoral的框架，然后詳細(xì)介紹了任務(wù)加載機(jī)制與任務(wù)交互機(jī)制的設(shè)計(jì)與實(shí)現(xiàn)。最后，對這兩種機(jī)制進(jìn)行了功能與性能測試，測試結(jié)果表明，，任務(wù)加載機(jī)制可以正常加載外部應(yīng)用任務(wù)至內(nèi)存中執(zhí)行，任務(wù)交互機(jī)制可以確保任務(wù)間互斥、同步、通信的正常進(jìn)行。
[Abstract]:With the development of embedded hardware technology. The embedded system has also been developed from a single function industrial control device to a multifunctional composite device. At present, the shortcomings of the unified compilation method of operating system and application task in embedded system are becoming increasingly obvious. ... in view of this. We must adopt some mechanism to deal with the embedded operating system and the application task separately, this mechanism is the task loading mechanism under the embedded platform. On the basis of deeply studying the task loading mechanism of PC platform, this paper studies and reads the format instructions of various executable files, and designs the executable application task format under embedded platform by summing up and designing. Task loader and kernel system call. At the same time, the interaction mechanism between tasks is deeply studied, and the spin lock, mutex lock, semaphore and message are designed according to the characteristics of the task under the task loading mechanism. On the basis of research and design, this paper finally implements the task loading and task interaction tools based on the embedded operating system aCoral. The task loading mechanism of embedded platform includes executable task format, task loader and kernel system call. There are two aspects of executable task file generation. Kernel system call includes two aspects: system call response in kernel and system call library design. Task interaction mechanism is mainly the design of task interaction tools. Task interaction tools include spin lock, mutex lock, semaphore, message, read and write lock design. This paper first introduces the framework of verification platform aCoral, and then introduces the design and implementation of task loading mechanism and task interaction mechanism in detail. Finally, the function and performance of these two mechanisms are tested. The test results show that the task loading mechanism can normally load the external application task into memory and the task interaction mechanism can ensure the mutually exclusive synchronization and communication between the tasks.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TP368.1

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