One of the first steps I’m taking in setting up x86_64 support for haiku is updating haiku_loader to support elf64 binaries. I felt like it would be a bit more logical to be able to boot a 64bit kernel before trying to build one.
This is a companion discussion topic for the original entry at https://www.haiku-os.org/blog/nmentley/2010-06-19_getting_haiku_loader_play_nicely_elves/