Bus1’s boot-efi, “UEFI Boot Manager”, is a new Github project, consisting of two components:
bootx64.efi: Boot Manager
– searches EFI binaries in (ESP)/EFI/bus1/*.efi
– executes the latest release version
– if a key is pressed during bootup, a menu is drawn showing all found binaries
– built-in command line editor
stubx64.efi: Boot Code Stub
– executes the embedded PE-sections which contain the kernel, initrd,
kernel cmdline, release string
– shows the splash screen from the embedded PE section
I’m not sure what Bus1 is. Their motto: “Somewhere, something incredible is waiting to be known.” Besides the above boot manager, they also have a few other new projects, including another UEFI one called Build, “Build UEFI Disk”.
More information:
https://github.com/bus1/build
https://github.com/bus1/boot-efi
Firmware Security 