https://coldreboot.dev/tags/meta/Recent content in Meta on cold-rebootHugoenFri, 01 May 2026 00:00:00 +0900https://coldreboot.dev/posts/hello-world/Fri, 01 May 2026 00:00:00 +0900https://coldreboot.dev/posts/hello-world/<p>In this blog, I&rsquo;ll be writing about topics of interest regarding the Linux kernel, OS internals, and low-level security.</p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-c" data-lang="c"><span class="line"><span class="cl"><span class="cp">#include</span> <span class="cpf">&lt;linux/module.h&gt;</span><span class="cp"> </span></span></span><span class="line"><span class="cl"><span class="cp">#include</span> <span class="cpf">&lt;linux/kernel.h&gt;</span><span class="cp"> </span></span></span><span class="line"><span class="cl"> </span></span><span class="line"><span class="cl"><span class="k">static</span> <span class="kt">int</span> <span class="n">__init</span> <span class="nf">hello_init</span><span class="p">(</span><span class="kt">void</span><span class="p">)</span> </span></span><span class="line"><span class="cl"><span class="p">{</span> </span></span><span class="line"><span class="cl"> <span class="nf">pr_info</span><span class="p">(</span><span class="s">&#34;hello, kernel world</span><span class="se">\n</span><span class="s">&#34;</span><span class="p">);</span> </span></span><span class="line"><span class="cl"> <span class="k">return</span> <span class="mi">0</span><span class="p">;</span> </span></span><span class="line"><span class="cl"><span class="p">}</span> </span></span><span class="line"><span class="cl"> </span></span><span class="line"><span class="cl"><span class="k">static</span> <span class="kt">void</span> <span class="n">__exit</span> <span class="nf">hello_exit</span><span class="p">(</span><span class="kt">void</span><span class="p">)</span> </span></span><span class="line"><span class="cl"><span class="p">{</span> </span></span><span class="line"><span class="cl"> <span class="nf">pr_info</span><span class="p">(</span><span class="s">&#34;goodbye</span><span class="se">\n</span><span class="s">&#34;</span><span class="p">);</span> </span></span><span class="line"><span class="cl"><span class="p">}</span> </span></span><span class="line"><span class="cl"> </span></span><span class="line"><span class="cl"><span class="nf">module_init</span><span class="p">(</span><span class="n">hello_init</span><span class="p">);</span> </span></span><span class="line"><span class="cl"><span class="nf">module_exit</span><span class="p">(</span><span class="n">hello_exit</span><span class="p">);</span> </span></span><span class="line"><span class="cl"><span class="nf">MODULE_LICENSE</span><span class="p">(</span><span class="s">&#34;GPL&#34;</span><span class="p">);</span> </span></span></code></pre></div><p>See you later.</p>