Warning
This repository is for historical purposes only. It is used as a monument to the year 2022, and may be used as a "nostalgia kit" to build older SalernOS versions from that year. The SalernOS EFI Bootloader was discontinued in 2023 and is no longer in use.
SalernOS is a small Toy OS I'm working on.
The SalernOS EFI Bootloader is a free and open source GNU-EFI bootloader built on top of https://github.com/Absurdponcho/gnu-efi
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Compiling SEB is quite eaasy, just follow these steps
- Make sure you're running a GNU/Linux system. If you're running Windows 10/11 or macOS, use WSL or Docker
- Install the build-essentials package via your package manager (apt-get/pacman etc)
- Open a terminal in the SEB directory
- If it's the first time you compile SEB, Type
makeand wait for a few seconds - Type
make bootloaderand wait for a few seconds - The resulting
main.efifile will be in thex86_64/bootloaderdirectory
All of SEB's source code is in the bootloader directory.
NOTE: Remember to change something in main.c before compiling, otherwise it won't work!
This is a little trickier, but you should be able to do it, otherwise, open an issue on this Github page.
The SalernOS EFI Bootlaoder uses the Simple Boot Specification to hand information over to the Kernel.
Currently the SEB Specification requires the following directories
- EFI
- EFI/BOOT
- openbit
- openbit/bin
- openbit/assets
The EFI/BOOTdirectory must contain a bootx64.efi file. This file is the SEB binary, you can get it by renaming the main.efi file.
The openbit/assets directory must contain a PSF1 Font named kernelfont.psf.
The openbit/bin directory must contain the kernel executable, named kernel.elf