Ok, after learning about the wonderful world of UEFI calling conventions, I have a workable copy of my patch. It probably only compiles right under gcc on x864_64 under linux (mainly due to the hackish approach to calling convention coping). I presume there is some gcc magic I need to put in the code or on the commandline to handle the calling convention change for me, but I will put it out there as-is instead of waiting to figure it out (really hoping someone else out there knows all this stuff).
In 'legacy' world, you can build ipxe and the syslinux pxelinux.0 and have the latter detect and make use of the former (they go a step further and actually bundle both in a single binary). This gives pxelinux.0 the iPXE protocol support without having to change much. This is the analogous capability for elilo. It comes in two halves. iPXE needed to have capabilities exposed in a UEFI protocol in much the same way it exports it in real mode. VMware largely did the work for their own boot loader, so that was just ported in. Those patches to ipxe are: https://git.ipxe.org/people/jbjohnso/ipxe.git/commit/d748ebf72206dcde1379b063fd9b533f7572caa5 https://git.ipxe.org/people/jbjohnso/ipxe.git/commit/e7b41890bc67350a9f5bcf7291ec859fa2174e26 https://git.ipxe.org/people/jbjohnso/ipxe.git/commit/45a51f99fd51b231a388b1db00dfc4b18a5e9e4f https://git.ipxe.org/people/jbjohnso/ipxe.git/commit/23aea6c209965546c39569a770823eabf1358a71 Apply those and 'make bin-x86_64-efi/snponly.efi and you have something much like undionly.kkpxe, but for UEFI. My (admittedly shoddy) patch is attached. The fruit of my labor: 88879.550706 192.168.121.208 -> 192.168.127.253 TFTP Read Request, File: snponly.efi\000, Transfer type: octet\000 88879.551387 192.168.121.208 -> 192.168.127.253 TFTP Read Request, File: snponly.efi\000, Transfer type: octet\000 88879.864373 192.168.121.13 -> 192.168.127.253 HTTP GET /tftpboot/xcat/xnba/nodes/fr1 HTTP/1.1 88879.865929 192.168.121.13 -> 192.168.127.253 HTTP GET /tftpboot/elilo-x64.efi HTTP/1.1 88879.872902 192.168.121.13 -> 192.168.127.253 HTTP GET /tftpboot/C0A879D0.conf HTTP/1.1 88880.466286 192.168.121.13 -> 192.168.127.253 HTTP GET /tftpboot/xcat/rhels6/x86_64/vmlinuz HTTP/1.1 88880.561916 192.168.121.13 -> 192.168.127.253 HTTP GET /tftpboot/xcat/rhels6/x86_64/initrd.img HTTP/1.1 (See attached file: elilo-ipxe.patch)
elilo-ipxe.patch
Description: Binary data
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