[GSoC] Emulating missing Linux syscalls project questions

[Theodore Preduta <theo%pta.gg@localhost>]

As the subject suggests, I think the emulating missing Linux syscalls 
project might be fun. I am just wondering

(1) Is there any documentation on the internals of this subsystem? 
(manpage and wiki seem to just be how to use it)

(2) Is there a better binary-finding strategy than trying Linux binaries 
on NetBSD, and if they fail (have a script) compare the output of strace 
from a Linux run of the program with the table in 
sys/compat/linux/arch/*/linux_syscalls.c?

(3) Do y'all have any suggestions for binaries? :P

(4) Most of the (failing) binaries I've found so far seem to have the 
epoll set of system calls in common, is there's some technical reason 
why that's not been implemented yet? (or it it just a matter of no one 
has done it yet)

Thanks in advance,

Theo(dore)