banan-os

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Bananymous 5d34cebeca Kernel: Fix stack OOB detection I now check both interrupt and normal stack to detect OOB. Processes are killed if they encouner stack over/under flow.		2023-10-30 12:17:08 +02:00
BAN	BAN: String now uses union for its sso storage	2023-10-30 11:13:16 +02:00
LibELF	Kernel/LibELF: Map pages always as RW so kernel can write to them	2023-10-30 12:14:12 +02:00
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kernel	Kernel: Fix stack OOB detection	2023-10-30 12:17:08 +02:00
libc	LibC: implement and call __cxa_finalize() on exit()	2023-10-30 11:10:08 +02:00
script	BuildSystem: Add bos short hand for building with zsh completions :)	2023-10-28 22:23:29 +03:00
toolchain	Toolchain: Clone GCC and Binutils from git	2023-10-30 11:02:57 +02:00
userspace	Userspace: Add quick test for global ctors and dtors	2023-10-30 11:11:10 +02:00
.gitignore	BuildSystem: Fix bugs in new build system	2023-10-24 16:48:46 +03:00
.gitmodules	Kernel: Add LAI as a dependency	2023-09-22 17:20:35 +03:00
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base-sysroot.tar.gz	BuildSystem: add cmake variable UEFI_BOOT	2023-10-16 01:44:54 +03:00
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README.md

banan-os

This is my hobby operating system written in C++. Currently supports only x86_64 architecture. We have a ext2 filesystem, basic ramfs, IDE disk drivers in ATA PIO mode, ATA AHCI drivers, userspace processes, executable loading from ELF format, linear VBE graphics and multithreaded processing on single core.

Code structure

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.

Building

There does not exist a complete list of needed packages for building. From the top of my head I can say that cmake, ninja, make, grub, rsync and emulator (qemu or bochs) are needed.

To build the toolchain for this os. You can run the following command.

NOTE: The following step has to be done only once. This might take a long time since we are compiling binutils and gcc.

./script/build.sh toolchain

To build the os itself you can run one of the following commands. You will need root access since the sysroot has "proper" permissions.

./script/build.sh qemu
./script/build.sh qemu-nographic
./script/build.sh qemu-debug
./script/build.sh bochs

You can also build the kernel or disk image without running it:

./script/build.sh kernel
./script/build.sh image

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.

./script/build.sh image-full

NOTE ninja clean has to be ran with root permissions, since it deletes from the banan-so sysroot.

If you feel like ./script/build.sh is too verbose, there exists a symlink bos in this projects root directory. All build commands can be used with ./bos args... instead.

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.

Contributing

Currently I don't accept contributions to this repository unless explicitly told otherwise. This is a learning project for me and I want to do everything myself. Feel free to fork/clone this repo and tinker with it yourself.