HariboteOS

HariboteOS

"30 Days Homemade Operating System" (Written by Hikaru Kawasaki) supporting code adaptation. Because the author used a set of non-standard tools he wrote himself and could not run on a non-Windows platform, this project uses NASM, GCC, Qemu and other tools to compile and run based on the original code.

This project has completed the contents of the 0th to 28th day (excluding the Japanese display part on the 28th day), and the main implementation of the project has been completed. Because the content of the last two chapters of the book is more application-oriented, it is not implemented in this project. Interested friends can continue to complete it based on the previous basis.

Project Features

• Using GCC and NASM as tool chains, it can be used across platforms
• Building kernel based on LinkerScript
• Custom HRB file format does not depend on the author, supports ELF file format
• Supports simple implementation of some C standard library functions (libc file)
• Header file splits, clearer structure
• Chinese keyboard support

Environmental dependency

• nasm
• gcc
• binutils
• qemu-system-i386
• mtools

Optional dependency

• gdb (debug use)

Install under Mac

The default Xcode Command Line Tools use gcc as an alias for clang under MacOS. Clang has not been tested in this project implementation, and there may be problems.

It is recommended to use x86_64-elf-gcc toolchain for compilation under Mac. You can use brew install x86_64-elf-gcc x86_64-elf-binutils x86_64-elf-gdb to install.

run

Enter the corresponding folder and run with the following command:

$ make qemu
# 若使用工具链包含前缀，如x86_64-elf-，可以使用GCCPREFIX
$ make qemu GCCPREFIX=x86_64-elf-

To debug using GDB, set DEBUG :

$ make qemu DEBUG=1

Final directory structure

• app : application source code
• include : System kernel header file
• kernel : system kernel code
• libc : Simple C standard library partial implementation

C standard library implementation

• strcmp
• strncmp

Refer to xv6 implementation:

• vsprintf
• sprintf

From "C Programming Language":

• rand

Project Progress

• Day 1: Hello world
• Day 2: Assembly and Makefile
• Day 3: Entering 32-bit mode
• Day 4: Screen display
• Day 5: GDT/IDT
• Day 6: Interrupt processing
• Day 7: FIFO
• Day 8: Mouse and 32-bit mode
• Day 9: Memory Management
• Day 10: Window Overlay
• Day 11: Window Processing
• Day 12: Timer 1
• Day 13: Timer 2
• Day 14: Keyboard input
• Day 15: Multitasking 1
• Day 16: Multitasking 2
• Day 17: Command Line Window
• Day 18: Command Line Command
• Day 19: Application
• Day 20: API
• Day 21: Protect the operating system
• Day 22: C language application (modified to ELF format)
• Day 23: Application Graphic Processing
• Day 24: Window Operation
• Day 25: More Window
• Day 26: Window operation speed up
• Day 27: LDT and library (not processed as in the book)
• Day 28: File operations and text display (excluding Japanese display part)

This project will not continue to add content from Day 29 and Day 30. Interested friends can continue to read the subsequent chapters.

Problems to be solved

• Timer execution will be stuck if using io_sti instead of io_stihlt
• The screen is occasionally black when starting, and the interface cannot be drawn normally
• Multiple command lines will be stuck when executing commands at the same time
• __alloca is invalid in day 28, sosu2 cannot run

Blog Posts

• Day 0: Preface
• Day 1: Hello world

Copyright information

The copyright of the code in the project mainly belongs to the original author. I only make partial modifications to the code for the part that cannot be directly run.