avcall(3) on Linux
The text 275df46ea28a, as Arch Linux 2026-11-01, Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster) shipped it. The page shows this text now.
build a C argument list incrementally and call a C function on it.