https://oussachi.github.io/posts/ Recent content in Posts on oussachi Hugo en-us Tue, 24 Feb 2026 00:00:00 +0000 https://oussachi.github.io/posts/building-a-binary-loader/ Tue, 24 Feb 2026 00:00:00 +0000 https://oussachi.github.io/posts/building-a-binary-loader/ <h1 id="introduction"> Introduction <a class="heading-link" href="#introduction"> <i class="fa-solid fa-link" aria-hidden="true" title="Link to heading"></i> <span class="sr-only">Link to heading</span> </a> </h1> <p>Binary loading and analysis are essential in reverse engineering, debugging, and security research. While Linux uses ELF as the standard binary format, manually parsing it is tedious and error-prone.</p> <p>This project implements a <strong>custom binary loader</strong>, following the book <em>Practical Binary Analysis</em>, with fixes to the original code to account for <strong>changes in function signatures</strong>. It uses <strong>libbfd</strong>, the GNU Binary File Descriptor library, to handle low-level parsing. The loader only loads <strong>function symbols</strong> and <strong>code/data sections</strong>, providing a structured and reusable interface.</p>