InjectByte-OS

Developing a Multithreaded Kernel from Scratch

InjectByte-OS is a low-level operating system project built from the ground up in C and x86 Assembly, designed to explore kernel development concepts such as multitasking, memory management, and hardware interaction. This repository contains the source code and resources used to develop the kernel.

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About

Just Curious About how The OS works. So why not make one Yourself. Blah Blah Blah Just read the Prerequisites and Getting Started Portion.

Key Concepts Covered

• Boot process and real mode setup
• Interrupt handling
• Memory management and paging
• Multithreading and task scheduling
• Disk I/O and filesystem basics
• ELF loader implementation
• Virtual filesystem design
• Kernel debugging in emulators like QEMU

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Prerequisites

• Knowledge of C programming
• Basic understanding of x86 Assembly
• Familiarity with command-line tools (optional but helpful)
• Download a C Cross Compiler "Must Find how? if You wanna Learn"

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Features

• Custom bootloader
• Protected mode kernel
• Interrupt Descriptor Table (IDT) implementation
• Paging and heap memory management
• Simple multitasking and scheduling
• Disk and keyboard drivers
• ELF file loading support

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Getting Started

1. Clone the repository:

   git clone https://github.com/IJBaig/InjectByte-OS.git
   cd InjectByte-OS

2. Cross Compiler

   Edit build.sh File according to Compiler's Path

3. Build the kernel:

   make clean
   ./build.sh

4. Run in QEMU:

   qemu-system-i386 -kernel bin/os.bin

Learning Outcomes

By exploring this project, you will gain hands-on experience in:

• Building a kernel from scratch

• Understanding memory and CPU architecture

• Differentiating between kernel space and user space

• Implementing basic multitasking

• Designing low-level drivers and system components

• Debugging using emulators and GDB

Credits

Special thanks to my mentor and instructor, Daniel McCarthy , whose guidance and course materials were invaluable in developing this kernel project.

License

This project is licensed under the GNU GENERAL PUBLIC LICENSE