121 lines
4.5 KiB
Markdown
121 lines
4.5 KiB
Markdown
[](https://git.bananymous.com/Bananymous/banan-os)
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[](https://git.bananymous.com/Bananymous/banan-os)
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[](https://git.bananymous.com/Bananymous/banan-os/src/branch/main/LICENSE)
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[](https://discord.gg/ehjGySwYdK)
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# banan-os
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This is my hobby operating system written in C++. Currently supports x86\_64 and i686 architectures.
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You can find a live demo [here](https://bananymous.com/banan-os)
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### Features
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#### General
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- [x] Ring3 userspace
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- [x] SMP (multiprocessing)
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- [x] Linear framebuffer (VESA and GOP)
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- [x] Network stack
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- [x] ELF executable loading
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- [x] AML interpreter (partial)
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- [ ] ELF dynamic linking
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- [ ] Graphical desktop
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- [ ] copy-on-write memory
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#### Drivers
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- [x] NVMe disks
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- [x] ATA (IDE, SATA) disks
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- [x] E1000 and E1000E NICs
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- [x] PS2 keyboard (all scancode sets)
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- [x] PS2 mouse
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- [ ] USB
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- [ ] virtio devices (network, storage)
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#### Network
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- [x] ARP
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- [x] ICMP
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- [x] IPv4
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- [x] UDP
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- [x] TCP (partial and buggy)
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- [x] Unix domain sockets
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#### Filesystems
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- [x] Virtual filesystem
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- [x] Ext2
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- [x] FAT12/16/32
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- [x] Dev
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- [x] Ram
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- [x] Proc
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- [ ] Sys
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- [ ] 9P
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#### Bootloader support
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- [x] GRUB
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- [x] Custom BIOS bootloader
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- [ ] Custom UEFI bootloader
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## Code structure
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Each major component and library has its own subdirectory (kernel, userspace, libc, ...). Each directory contains directory *include*, which has **all** of the header files of the component. Every header is included by its absolute path.
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## Building
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### Needed packages
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#### apt (tested on ubuntu 22.04)
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```# apt install build-essential git ninja-build texinfo bison flex libgmp-dev libmpfr-dev libmpc-dev parted qemu-system-x86 cpu-checker```
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#### pacman
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```# pacman -S --needed base-devel git wget cmake ninja parted qemu-system-x86```
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### Compilation
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To build the toolchain for this os. You can run the following command.
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> ***NOTE:*** The following step has to be done only once. This might take a long time since we are compiling binutils and gcc.
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```sh
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./bos toolchain
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```
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To build the os itself you can run one of the following commands. You will need root access for disk image creation/modification.
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```sh
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./bos qemu
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./bos qemu-nographic
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./bos qemu-debug
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./bos bochs
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```
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You can also build the kernel or disk image without running it:
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```sh
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./bos kernel
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./bos image
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```
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To build for other architectures set environment variable BANAN\_ARCH=*arch* (e.g. BANAN\_ARCH=i686).
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To change the bootloader you can set environment variable BANAN\_BOOTLOADER; supported values are BANAN (my custom bootloader) and GRUB.
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To run with UEFI set environment variable BANAN\_UEFI\_BOOT=1. You will also have to set OVMF\_PATH to the correct OVMF (default */usr/share/ovmf/x64/OVMF.fd*).
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If you have corrupted your disk image or want to create new one, you can either manually delete *build/banan-os.img* and build system will automatically create you a new one or you can run the following command.
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```sh
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./bos image-full
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```
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I have also created shell completion script for zsh. You can either copy the file in _script/shell-completion/zsh/\_bos_ to _/usr/share/zsh/site-functions/_ or add the _script/shell-completion/zsh_ to your fpath in _.zshrc_.
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## Contributing
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As the upstream is hosted on my server https://git.bananymous.com/Bananymous/banan-os, please contact me about account creation ([email](mailto:oskari.alaranta@bananymous.com), [discord](https://discord.gg/ehjGySwYdK)) and I will add a account for you. This is done to limit the people with access to the server.
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As this is mostly a learning experience for me, I would appreciate if you first contacted me about adding new features (email, discord, issue, ...). Bug fixes are always welcome!
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Commit message should be formatted followingly
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1. First line is of the form "_Subject: Description_", where _Subject_ tells the area touched (Kernel, Shell, BuildSystem, ...) and _Description_ is brief description of the change done. First line should fit fully in 70 characters.
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2. Body of the message should further describe the change and reasoning behind the change.
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All commits should pass the pre-commit hook defined in _.pre-commit-config.yaml_. For instructions on how to setup pre-commit, please see https://pre-commit.com/#install.
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