https://flock137.github.io/tags/assembly/Recent content in Assembly on Flock137Hugo -- 0.149.0en-usThu, 12 Mar 2026 00:00:00 +0700https://flock137.github.io/posts/arm_disasm/Thu, 12 Mar 2026 00:00:00 +0700https://flock137.github.io/posts/arm_disasm/<h2 id="introduction">Introduction</h2> <p>When you compile C code for an ARM microcontroller, the compiler translates your high-level code into machine instructions. Reverse engineering tools like Binary Ninja, Ghidra, radare2, etc. can decompile those instructions back into pseudo-C code. This guide shows you how to read that decompiled output and understand what&rsquo;s happening at the hardware level.</p> <h2 id="the-example-stm32-led-blink">The Example: STM32 LED Blink</h2> <p>We&rsquo;ll use a simple LED blink program for an STM32F103xx (ARM Cortex-M3) microcontroller, that I have published in another repo: <a href="https://github.com/Flock137/stm32_blinky_baremetal">https://github.com/Flock137/stm32_blinky_baremetal</a></p>