Re:It's far from clear how grub package updates work on Ubuntu
by acka on Saturday April 13, 2024 @10:00AM
(#40023199)
Don't forget Syslinux[0], available for both legacy BIOS systems as well as EFI. All binaries except for the really low level stuff are in ELF format, so can be generated, linked and manipulated by tools which support this.
[0]: https://wiki.syslinux.org/