On Thu Sep 14, 2023 at 11:48 AM EEST, Lennart Poettering wrote: > On Di, 12.09.23 17:32, Jan Hendrik Farr (kernel@xxxxxxxx) wrote: > > > >> The format itself is rather simple. It's just a PE file (as required > > >> by the UEFI spec) that contains a small stub application in the .text, > > >> .data, etc sections that is responsible for invoking the contained > > >> kernel and initrd with the contained cmdline. The kernel image is > > >> placed into a .kernel section, the initrd into a .initrd section, and > > >> the cmdline into a .cmdline section in the PE executable. > > > > > > How does this interact with the existing EFI stub support in > > > linux? > > > > It doesn't. During normal boot of a UKI the stub in it is used > > (systemd-stub, see: > > https://www.freedesktop.org/software/systemd/man/systemd-stub.html). The > > kernel's own EFI stub will still be in the binary inside the .linux > > section but not used. > > That's not true actually, if the inner kernel supports the EFI stub > then systemd-stub actually defers to that for kernel execution. It's > more portable that way, since the kernel then deals with the > differences in the boot protocol on different architectures. OK, that's nice. > Lennart > > -- > Lennart Poettering, Berlin BR, Jarkko _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec
