Why does my assembly network server application cause a segmentation fault?

I’m working on a network server application in assembly language so I can understand low level networking concepts. So I’ve implemented a socket server using assembly language system calls, but […]

Segmentation Fault in Assembly Program Using AT&T Syntax and GNU Assembler

I’ve written a test program using AT&T syntax for use with GNU assembler. The program is supposed to print the value `1` using printf.

Handling Multi-Digit Integer Input in Assembly on Ubuntu 22.04

This `fm_module.txt` file has a copy of my project source code that involves a simple user input and arithmetic operations on an Intel Core i7-12700K processor running Ubuntu 22.04. I’ve […]

Why is the XOR operation not toggling the player variable in my x86 assembly tic-tac-toe game?

I am working on a text based tic-tac-toe game for some users, using x86 assembly on an Intel Core i7 12700K systems running Ubuntu 22.04. I’m using NASM assembler and […]

How can I debug an “Illegal instruction” error in my x86-64 assembly ray tracer?

I’m working on a personal project , a simple ray tracer written in x86-64 assembly for educational purposes. It’s currently in the early stages, focusing on basic ray-sphere intersection calculations. […]

I have discovered that it seems r0 is always set to 1, meaning INIT2 is never skipped.

Good day guys, this code here is part of the initialization code for a firmware of an STM32F030 microcontroller, disassembled using Radare2. It is executed after the clock initialization but […]

How to Disassemble and Filter Out Static Jumps in Program Output with Bash

My program outputs encoded instructions, and each line represents an independent set of instructions, like this: 0x81FB4300000090 0x69FC4300000090 0x81FC4300000090 0x69FD4300000090 0x81FD4300000090 0x69FE4300000090 0x81FE4300000090 0x69FF4300000090 0x81FF4300000090 0x00054400000090 0x01054400000090 0x02054400000090 0x03054400000090 0x08054400000090 […]

Impact of Using Extended Registers (r8, r9, etc.) on Code Size and Performance

I have a question about using the extended registers as in r8, r9, r10, …. , I want to use them frequently in my program, but I’ve noticed a problem […]

Ensuring 16-bit THUMB Instruction Encoding for Code Execution from SRAM on STM32F103

I’m working on a project where I want to execute code from internal SRAM on an STM32F103 as an exercise. My goal is to write some THUMB assembly by hand, […]