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diff --git a/public/post/architecture-of-linux-kernel/index.html b/public/post/architecture-of-linux-kernel/index.html new file mode 100644 index 0000000..fb665a9 --- /dev/null +++ b/public/post/architecture-of-linux-kernel/index.html @@ -0,0 +1,94 @@ +<!DOCTYPE html> +<html lang="en"> + +<head> + <meta charset="utf-8"> + +<title>Architecture of Linux Kernel | garhve's gibberish</title> + + + <link rel="shortcut icon" type="image/png" href="/images/favicon.png"> + <meta name="viewport" content="width=device-width,initial-scale=1"> + + <link id="stylesheet" rel="stylesheet" type="text/css" href="/dark.css"> + + <script type="text/javascript" src="/js/theme.js"></script> + +</head> + +<div class="header"> + <div class="site_title"> + <p><a href="/"><img src="https://blog.garhve.com/images/logo.ico" alt="garhve's gibberish" + width="70" height=auto></a></p> + <p><a href="/"> garhve's gibberish</a></p> + </div> + <div class="menu"> + <!-- <a href="/tags">tags</a> + --><a href="/categories">categories</a> + </div> +</div> + +<body onload="getTheme()"> + <section class="section"> + <div class="container"> + +<p> + <div class="title_postpage">Architecture of Linux Kernel</div> +</p> +<p> + <div class="date_postpage">2022-09-03</div> + <div class="taxonomies_postpage"> + + + <a href="https://blog.garhve.com/categories/cs/">/cs</a> + + + + +  <a href="https://blog.garhve.com/tags/linux/">#linux</a> + + + </div> +</p> + +<p> + <h2 id="description">Description</h2> +<p>Modern microcontrollers nowadays support at least two privilege levels. Intel/AMD x86-64 family supports 4 levels, whilst ARM (32bit) microcontrollers support up to 7 levels (6 privileged, 1 non-privileged).</p> +<p>Modern operating systems support at least 2 levels:</p> +<ul> +<li><strong>User space</strong>: For applications to run in unprivileged user mode</li> +<li><strong>Kernel space</strong>: For the kernel (and all its components) to run in privileged mode – kernel mode</li> +</ul> +<p>Address of these 2 spaces are separate.</p> +<p>Applications in user mode will auto-linked to glibc(the GNU standard C library). Libraries only available in user mode, kernel mode doesn't have this conception. An application only can through <strong>System call</strong> to access kernel. On the other hand, system calls are the only legal entry point into the kernel space.</p> +<blockquote> +<p>Libraries APIs: man section 3 +System calls APIs: man section 2</p> +</blockquote> +<p>to be continue...</p> + +</p> + + +<script> + MathJax = { + tex: { + inlineMath: [['$', '$'], ['\\(', '\\)']] + } + }; +</script> +<script type="text/javascript" async + src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-chtml.js"> +</script> + + + + </div> + </section> +</body> + +<div class="footer"> +  © garhve +</div> + +</html> |