Libasm 🔍✨

A Journey into Low-Level Programming with x86-64 Assembly

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🚀 Overview

Libasm is a project where you reimplement basic C standard library functions in x86-64 assembly, gaining deep insight into how computers execute code at the lowest level. Perfect for aspiring reverse engineers, exploit developers, or anyone curious about what happens "under the hood"!

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🔑 Key Features

✅ Core Functions:

• ft_strlen | ft_strcpy | ft_strcmp
• ft_write | ft_read | ft_strdup

🌟 Bonus (Linked List):

• ft_atoi_base | ft_list_push_front | ft_list_size | (+more)

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🛠️ Technical Highlights

Aspect	Details
Assembly Syntax	NASM (Intel-style)
Calling Convention	System V AMD64 ABI
Error Handling	Properly set errno for syscalls
Optimization	Zero-cost loops, register efficiency

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🔍 Security Insight 🛡️

Understanding assembly is crucial for:

• Reverse Engineering: Analyze malware or proprietary software.
• Exploit Development: Find buffer overflows, write shellcode.
• Secure Coding: Learn why functions like strcpy are dangerous.

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📂 Project Structure

libasm/  
├── ft_strlen.s    # Assembly source
├── ft_strcpy.s  
├── Makefile       # Builds libasm.a
└── test/          # Test cases vs. real C functions

🌟 Why This Project?

Master registers, syscalls, and memory management.

Write code that’s 10x faster than C (with clever optimizations).

Lay the groundwork for security research (malware analysis, binary exploitation).

Made with ❤️ and nasm. For hackers, by a future hacker. 🐱💻

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🎨 Tips for GitHub Polish

1. Add a Demo GIF: Show your tests in action!

   ![Demo](https://media.giphy.com/media/your-demo-link.gif)