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<li class="toctree-l2"><a class="reference internal" href="../chapter4/3sv39-implementation-1.html">实现 SV39 多级页表机制（上）</a></li>
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<li class="toctree-l2"><a class="reference internal" href="2core-data-structures.html">进程管理的核心数据结构</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../chapter6/2fs-implementation-1.html">简易文件系统 easy-fs (上)</a></li>
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</ul>
|
||
</li>
|
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</ul>
|
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<p class="caption" role="heading"><span class="caption-text">附录</span></p>
|
||
<ul>
|
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<li class="toctree-l1 has-children"><a class="reference internal" href="../appendix-a/index.html">附录 A：Rust 系统编程资料</a><input class="toctree-checkbox" id="toctree-checkbox-17" name="toctree-checkbox-17" role="switch" type="checkbox"/><label for="toctree-checkbox-17"><div class="visually-hidden">Toggle child pages in navigation</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul class="simple">
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<li class="toctree-l1 has-children"><a class="reference internal" href="../appendix-b/index.html">附录 B：常见工具的使用方法</a><input class="toctree-checkbox" id="toctree-checkbox-18" name="toctree-checkbox-18" role="switch" type="checkbox"/><label for="toctree-checkbox-18"><div class="visually-hidden">Toggle child pages in navigation</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul class="simple">
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<li class="toctree-l1 has-children"><a class="reference internal" href="../appendix-c/index.html">附录 C：深入机器模式：RustSBI</a><input class="toctree-checkbox" id="toctree-checkbox-19" name="toctree-checkbox-19" role="switch" type="checkbox"/><label for="toctree-checkbox-19"><div class="visually-hidden">Toggle child pages in navigation</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul class="simple">
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|
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<li class="toctree-l1"><a class="reference internal" href="../appendix-d/index.html">附录 D：RISC-V相关信息</a></li>
|
||
</ul>
|
||
<p class="caption" role="heading"><span class="caption-text">开发注记</span></p>
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<li class="toctree-l1 has-children"><a class="reference internal" href="../setup-sphinx.html">修改和构建本项目</a><input class="toctree-checkbox" id="toctree-checkbox-20" name="toctree-checkbox-20" role="switch" type="checkbox"/><label for="toctree-checkbox-20"><div class="visually-hidden">Toggle child pages in navigation</div><i class="icon"><svg><use href="#svg-arrow-right"></use></svg></i></label><ul class="simple">
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<div class="section" id="id1">
|
||
<h1>引言<a class="headerlink" href="#id1" title="永久链接至标题">¶</a></h1>
|
||
<div class="section" id="id2">
|
||
<h2>本章导读<a class="headerlink" href="#id2" title="永久链接至标题">¶</a></h2>
|
||
<div class="admonition note">
|
||
<p class="admonition-title">注解</p>
|
||
<p>基于github classroom的开发方式</p>
|
||
<p>基于github classroom，可方便建立开发用的git repository，并可基于github的 codespace （在线版ubuntu +vscode）在线开发使用。整个开发环境仅仅需要一个网络浏览器。</p>
|
||
<ol class="arabic simple">
|
||
<li><p>在网络浏览器中用自己的 github id 登录 github.com</p></li>
|
||
<li><p>接收 <a class="reference external" href="https://classroom.github.com/a/RxB6h4-x">第三个实验(os5)的github classroom在线邀请</a> ，根据提示一路选择OK即可。</p></li>
|
||
<li><p>完成第二步后，你的第三个实验的 github repository 会被自动建立好，点击此github repository的链接，就可看到你要完成的第一个实验了。</p></li>
|
||
<li><p>在你的第三个实验的网页的中上部可以看到一个醒目的 <cite>code</cite> 绿色按钮，点击后，可以进一步看到 <cite>codespace</cite> 标签和醒目的 <cite>create codesapce on main</cite> 绿色按钮。请点击这个绿色按钮，就可以进入到在线的ubuntu +vscode环境中</p></li>
|
||
<li><p>再按照下面的环境安装提示在vscode的 <cite>console</cite> 中安装配置开发环境：rustc，qemu等工具。注：也可在vscode的 <cite>console</cite> 中执行 <code class="docutils literal notranslate"><span class="pre">make</span> <span class="pre">codespaces_setenv</span></code> 来自动安装配置开发环境（执行``sudo``需要root权限，仅需要执行一次）。</p></li>
|
||
<li><p>在vscode的 <cite>console</cite> 中执行 <cite>make setupclassroom_test5</cite> （该命令仅执行一次）配置githubclassroom 自动评分功能。</p></li>
|
||
<li><p>然后就可以基于在线vscode进行开发、运行、提交等完整的实验过程了。</p></li>
|
||
</ol>
|
||
<p>上述的3，4，5步不是必须的，你也可以线下本地开发。</p>
|
||
<p>注：如果是本地的ubuntu中建立开发环境，可在shell中执行 <code class="docutils literal notranslate"><span class="pre">make</span> <span class="pre">ubuntu_local_setenv</span></code> 来自动安装配置开发环境（执行``sudo``需要root权限，仅需要执行一次）。</p>
|
||
</div>
|
||
<p>我们将开发一个用户 <strong>终端</strong> (Terminal) 或 <strong>命令行</strong> (Command Line Application, 俗称 <strong>Shell</strong> ) ，
|
||
形成用户与操作系统进行交互的命令行界面 (Command Line Interface)。</p>
|
||
<p>为此，我们要对任务建立新的抽象： <strong>进程</strong> ，并实现若干基于 <strong>进程</strong> 的强大系统调用。</p>
|
||
<div class="admonition note">
|
||
<p class="admonition-title">注解</p>
|
||
<p><strong>任务和进程的关系与区别</strong></p>
|
||
<p>第三章提到的 <strong>任务</strong> 是这里提到的 <strong>进程</strong> 的初级阶段，与任务相比，进程能在运行中创建 <strong>子进程</strong> 、
|
||
用新的 <strong>程序</strong> 内容覆盖已有的 <strong>程序</strong> 内容、可管理更多物理或虚拟 <strong>资源</strong> 。</p>
|
||
</div>
|
||
</div>
|
||
<div class="section" id="id3">
|
||
<h2>实践体验<a class="headerlink" href="#id3" title="永久链接至标题">¶</a></h2>
|
||
<p>获取本章代码：</p>
|
||
<div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>git clone https://github.com/LearningOS/rust-based-os-comp2022.git
|
||
<span class="gp">$ </span><span class="nb">cd</span> rust-based-os-comp2022/
|
||
<span class="gp">$ </span>make setupclassroom_test5 //注意：这一步很重要，是用于github classroom自动评测你的工作。这一步只需在首次克隆项目仓库时执行一次，以后一般就不用执行了，除非 .github/workflows/classroom.yml发生了变化。
|
||
</pre></div>
|
||
</div>
|
||
<p>在 qemu 模拟器上运行`lab3(os5)参考框架: <<a class="reference external" href="https://github.com/LearningOS/rust-based-os-comp2022/tree/main/os5-ref">https://github.com/LearningOS/rust-based-os-comp2022/tree/main/os5-ref</a>>`_ ：</p>
|
||
<div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span><span class="nb">cd</span> os5-ref
|
||
<span class="gp">$ </span>make run
|
||
</pre></div>
|
||
</div>
|
||
<p>待内核初始化完毕之后，将在屏幕上打印可用的应用列表并进入shell程序：</p>
|
||
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>[rustsbi] RustSBI version 0.2.0-alpha.4
|
||
.______ __ __ _______.___________. _______..______ __
|
||
| _ \ | | | | / | | / || _ \ | |
|
||
| |_) | | | | | | (----`---| |----`| (----`| |_) || |
|
||
| / | | | | \ \ | | \ \ | _ < | |
|
||
| |\ \----.| `--' |.----) | | | .----) | | |_) || |
|
||
| _| `._____| \______/ |_______/ |__| |_______/ |______/ |__|
|
||
|
||
[rustsbi] Implementation: RustSBI-QEMU Version 0.0.1
|
||
[rustsbi-dtb] Hart count: cluster0 with 1 cores
|
||
[rustsbi] misa: RV64ACDFIMSU
|
||
[rustsbi] mideleg: ssoft, stimer, sext (0x222)
|
||
[rustsbi] medeleg: ima, ia, bkpt, la, sa, uecall, ipage, lpage, spage (0xb1ab)
|
||
[rustsbi] pmp0: 0x80000000 ..= 0x800fffff (rwx)
|
||
[rustsbi] pmp1: 0x80000000 ..= 0x807fffff (rwx)
|
||
[rustsbi] pmp2: 0x0 ..= 0xffffffffffffff (---)
|
||
[rustsbi] enter supervisor 0x80200000
|
||
[kernel] Hello, world!
|
||
/**** APPS ****
|
||
ch2b_bad_address
|
||
ch2b_bad_instructions
|
||
ch2b_bad_register
|
||
ch2b_hello_world
|
||
ch2b_power_3
|
||
ch2b_power_5
|
||
ch2b_power_7
|
||
ch3b_sleep
|
||
ch3b_sleep1
|
||
ch3b_yield0
|
||
ch3b_yield1
|
||
ch3b_yield2
|
||
ch5b_exit
|
||
ch5b_forktest
|
||
ch5b_forktest2
|
||
ch5b_forktest_simple
|
||
ch5b_forktree
|
||
ch5b_initproc
|
||
ch5b_user_shell
|
||
**************/
|
||
Rust user shell
|
||
>>
|
||
</pre></div>
|
||
</div>
|
||
<p>可以通过输入ch5b开头的应用来测试ch5实现的fork等功能:</p>
|
||
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>>> ch5b_forktest_simple
|
||
|
||
sys_wait without child process test passed!
|
||
parent start, pid = 2!
|
||
ready waiting on parent process!
|
||
hello child process!
|
||
child process pid = 3, exit code = 100
|
||
Shell: Process 2 exited with code 0
|
||
</pre></div>
|
||
</div>
|
||
</div>
|
||
<div class="section" id="id4">
|
||
<h2><a class="reference external" href="https://github.com/LearningOS/rust-based-os-comp2022/tree/main/os5-ref">lab3(os5)参考框架:</a><a class="headerlink" href="#id4" title="永久链接至标题">¶</a></h2>
|
||
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="linenos"> 1</span>├── os5-ref
|
||
<span class="linenos"> 2</span> ├── build.rs(修改：基于应用名的应用构建器)
|
||
<span class="linenos"> 3</span> ├── ...
|
||
<span class="linenos"> 4</span> └── src
|
||
<span class="linenos"> 5</span> ├── ...
|
||
<span class="linenos"> 6</span> ├── loader.rs(修改：基于应用名的应用加载器)
|
||
<span class="linenos"> 7</span> ├── main.rs(修改)
|
||
<span class="linenos"> 8</span> ├── mm(修改：为了支持本章的系统调用对此模块做若干增强)
|
||
<span class="linenos"> 9</span> │ ├── address.rs
|
||
<span class="linenos">10</span> │ ├── frame_allocator.rs
|
||
<span class="linenos">11</span> │ ├── heap_allocator.rs
|
||
<span class="linenos">12</span> │ ├── memory_set.rs
|
||
<span class="linenos">13</span> │ ├── mod.rs
|
||
<span class="linenos">14</span> │ └── page_table.rs
|
||
<span class="linenos">15</span> ├── syscall
|
||
<span class="linenos">16</span> │ ├── fs.rs(修改：新增 sys_read)
|
||
<span class="linenos">17</span> │ ├── mod.rs(修改：新的系统调用的分发处理)
|
||
<span class="linenos">18</span> │ └── process.rs（修改：新增 sys_getpid/fork/exec/waitpid）
|
||
<span class="linenos">19</span> ├── task
|
||
<span class="linenos">20</span> │ ├── context.rs
|
||
<span class="linenos">21</span> │ ├── manager.rs(新增：任务管理器，为上一章任务管理器功能的一部分)
|
||
<span class="linenos">22</span> │ ├── mod.rs(修改：调整原来的接口实现以支持进程)
|
||
<span class="linenos">23</span> │ ├── pid.rs(新增：进程标识符和内核栈的 Rust 抽象)
|
||
<span class="linenos">24</span> │ ├── processor.rs(新增：处理器管理结构 ``Processor`` ，为上一章任务管理器功能的一部分)
|
||
<span class="linenos">25</span> │ ├── switch.rs
|
||
<span class="linenos">26</span> │ ├── switch.S
|
||
<span class="linenos">27</span> │ └── task.rs(修改：支持进程机制的任务控制块)
|
||
<span class="linenos">28</span> └── trap
|
||
<span class="linenos">29</span> ├── context.rs
|
||
<span class="linenos">30</span> ├── mod.rs(修改：对于系统调用的实现进行修改以支持进程系统调用)
|
||
<span class="linenos">31</span> └── trap.S
|
||
<span class="linenos">32</span>
|
||
<span class="linenos">33</span>cloc os
|
||
<span class="linenos">34</span>-------------------------------------------------------------------------------
|
||
<span class="linenos">35</span>Language files blank comment code
|
||
<span class="linenos">36</span>-------------------------------------------------------------------------------
|
||
<span class="linenos">37</span>Rust 29 180 138 2049
|
||
<span class="linenos">38</span>Assembly 4 20 26 229
|
||
<span class="linenos">39</span>make 1 11 4 36
|
||
<span class="linenos">40</span>TOML 1 2 1 13
|
||
<span class="linenos">41</span>-------------------------------------------------------------------------------
|
||
<span class="linenos">42</span>SUM: 35 213 169 2327
|
||
<span class="linenos">43</span>-------------------------------------------------------------------------------
|
||
</pre></div>
|
||
</div>
|
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</div>
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