SimpleKernel

Key Words

kernel
x86, x86_64, riscv64
C, C++, AT&T ASM
cmake
multiboot2, opensbi

Abstract

SimpleKernel, a simple kernel for learning. Contains the basic functionality of an operating system

Kernels with different levels of completion are available, and you can start from where you like.

Each branch:

boot: system startup, from the bootloader to the kernel entry
printf: basic character output for debud
parse_boot_info: reliminary parsing of the information passed by the bootloader
pmm: physical memory management
vmm: virtual memory management
heap: heap management
lib: part of c++ std/stl
intr: interrupt management
task: TODO
filesystem: TODO
device management: TODO
syscall: TODO
user mode: TODO

Environment

Common tools

Cross compiler x86_64-elf-gcc, riscv64-unknown-elf-gcc, arm-none-eabi-gcc

Debug x86_64-elf-gdb, riscv64-unknown-elf-gdb, arm-none-eabi-gdb

Build cmake

Simulator bochs, qemu
For x86

Bootloader grub

ISO xorriso
For riscv64

Bootloader opensbi
For arm

TODO

RUN

git clone https://github.com/Simple-XX/SimpleKernel.git
cd SimpleKernel/
bash ./run.sh

Screenshot

Directory Structure

The whole project according to the functional modules delimited molecular directory, each subdirectory and then divided header file and source file directory, so that the architecture is clear and easy to understand.

Directory Design

Principle

The naming of the directory should accurately describe the basic function of the module, it is recommended to use lowercase letters and do not contain underline, dot and other special symbols;

Directories must be placed under the parent directory that they contain, and they need to be explicitly coupled to other directories.

Dependencies

Principle

New components are often dependent on existing components of the system, and the components that are directly dependent must be specified with minimal coupling.

Header File

Naming

Principle

Header file naming should accurately describe the contents of the module contained in the file to achieve the purpose of easy to understand.