Re:C library system-call wrappers, or the lack thereof
by klodolph on Wednesday November 14, 2018 @09:42AM
(#18450117)
VDSO does not have syscalls in it, that's actually the entire reason it exists… so you can communicate between the kernel and userspace without syscalls.
http://man7.org/linux/man-pages/man7/vdso.7.html