f953f3d3ff
Every inode holds a weak pointer to shared file data. This contains physical addresses of pages for inode file data. Physical addresses are allocated and read on demand. When last shared mapping is unmapped. The inodes shared data is freed and written to the inode. |
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|---|---|---|
| BAN | ||
| LibELF | ||
| assets | ||
| kernel | ||
| libc | ||
| toolchain | ||
| userspace | ||
| .gitignore | ||
| .gitmodules | ||
| CMakeLists.txt | ||
| LICENCE | ||
| PreLoad.cmake | ||
| README.md | ||
| base-sysroot.tar.gz | ||
| bochs.sh | ||
| check-fs.sh | ||
| image-full.sh | ||
| image.sh | ||
| qemu.sh | ||
README.md
banan-os
This is my hobby operating system written in C++. Currently supports only x86_64 architecture. We have a read-only ext2 filesystem, read-write ramfs, IDE disk drivers in ATA PIO mode, 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.
You can and should pass cmake variable QEMU_ACCEL set to proper accelerator to cmake commands. For example on Linux this means adding -DQEMU_ACCEL=kvm to the end of all cmake commands.
Create the build directory and cofigure cmake
mkdir build
cd build
cmake ..
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.
ninja toolchain
cmake --fresh .. # We need to reconfigure cmake to use the new compiler
ninja libstdc++
To build the os itself you can run either of the following commands. You will need root access since the sysroot has "proper" permissions.
ninja qemu
ninja bochs
You can also build the kernel or disk image without running it:
ninja kernel
ninja image
If you have corrupted your disk image or want to create new one, you can either manually delete banan-os.img and cmake will automatically create you a new one or you can run the following command.
ninja image-full
NOTE
ninja cleanhas to be ran with root permissions, since it deletes the root filesystem.
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.