> to have 64 bit offsets or 32 bit offsets[1]. Right now, from user space, that > is only possible via process personality flags. Or via CONFIG_X86_X32, which exposes extra syscalls ON x86_64 ONLY. I guess that would be better than nothing--although glibc would have to look seriously strange to use those: Even on ARM, it would have to try this syscall first, and then the normal one. I don't think that that is reasonable to add to glibc.