The PS5 libkernel exports _accept, _bind, _connect, _getdirentries,
_getpeername, _getsockname, _getsockopt, _listen, _recvfrom, _recvmsg,
_sendmsg, _sendto, _setsockopt, _sigaction and _sigsuspend (PS5 3.20
export list, DNNDHH/PS5-3.20_Libs b2a77c0 libkernel.c), and main
exports none of them, so a title importing one fails at startup. Each
now forwards to the export without the underscore, as _close, _ioctl
and _nanosleep already do.
In FreeBSD 11.4 (8c639945a4) these are libc's plain system call
entries: lib/libc/amd64/SYS.h makes bind, getdirentries, getpeername,
getsockname, getsockopt, listen and setsockopt one stub under both
names, and lib/libc/sys/Makefile.inc gives accept, connect, recvfrom,
recvmsg, sendmsg, sendto, sigaction and sigsuspend a separate public
name that goes through libthr's interposing table, which adds the
cancellation points and the sigaction wrapper. The exports without the
underscore have no libthr layer here, so forwarding gives the system
call. docs/dev/debt/libkernel.md records what stays unverified: the
console is not measured, _sigaction shares the handler table of
sigaction, and a null set throws in _sigsuspend as in sigsuspend,
where FreeBSD's system call returns EFAULT.
guest_underscore_entries calls every new export: a loopback TCP
connection, UDP datagrams with scatter, truncation and sender
addresses, a directory listing compared with getdirentries, a SIGTERM
handler set by _sigaction, and a pending SIGUSR1 that _sigsuspend
delivers before returning EINTR with the mask restored. It checks the
errors they pass on (EBADF, EINVAL, EFAULT, ENOPROTOOPT, EOPNOTSUPP)
and that outputs stay untouched on failure.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
boykopovar