Bananymous
76f48f095c
This commit consists of multiple big changes
1. blocks for inodes are now allocated on demand
- reading from non allocated block will just return zeroes
- writing to non allocated block allocates it
2. code doesn't really use raw pointers anymore
- all casts to uint32_t or structures are now replaced with
spans. either as<T> or as_span<T> which both are bounds
checked
3. code doesn't depend on random macros for accessing indirect blocks
- i added some recursive functions which take care of this :)
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|---|---|---|
| BAN | ||
| LibELF | ||
| assets | ||
| kernel | ||
| libc | ||
| script | ||
| toolchain | ||
| userspace | ||
| .gitignore | ||
| .gitmodules | ||
| CMakeLists.txt | ||
| LICENCE | ||
| README.md | ||
| base-sysroot.tar.gz | ||
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 cleanhas to be ran with root permissions, since it deletes from the banan-so sysroot.
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.