XNU's poll never reports POLLPRI for out-of-band data, so a guest poll
that asks for it never sees the urgent byte: guest_poll aborts at the
OOB case and a title waiting on priority data would sleep to its
timeout.
On macOS the pending byte is read from SIOCATMARK, which reports it
without consuming it and has no descriptor limit, unlike the fd_set
probe this replaces. POLLRDBAND is set with POLLPRI as FreeBSD 11.4's
sopoll_generic does, and the wait takes the sliced path main already
uses for a kqueue wait, so it wakes on the next slice instead of at the
deadline.
recv(MSG_OOB | MSG_PEEK) was measured to consume the byte on macOS
27.0.1 and kevent with NOTE_OOB does not fire there, which is why the
probe is SIOCATMARK. The select and libSceNet poll paths still miss
urgent data on macOS and are recorded in the debt entry.
FreeBSD's pollscan clears POLLOUT whenever POLLHUP is set, for every
descriptor. 64ca6e332 applied that to pipes, but a stream socket whose
peer has closed and whose own sending side is shut down still reported
POLLOUT next to POLLHUP, because Linux's poll sets both. Linux sets
POLLHUP only once both directions are shut, the same condition as
FreeBSD, so poll now clears POLLOUT from any entry that reports POLLHUP
there.
Apply the firmware 13.42 module-probe report in PR #9506: all four DNS calls check initialization first; getters return EINVAL for null outputs or nonzero flags; setters reject flags before reading guest memory. Keep the checked input copy and document EFAULT as host safety, not firmware behavior. Use the current public Net.hpp declarations in the regression.
Rebased onto upstream e7e3e9c198. Ubuntu 24.04, GCC 13.3, Release: actual libc/libkernel/libSceNet libraries and both focused test executables built. guest_sce_net passes. A separate harness linked against those unmodified libraries passes initialization, errno, invalid flags, unreadable-input flag precedence, null clearing and unchanged-output checks. The full guest_net_dns_info test is blocked here: process_vm_readv is denied with EPERM by the execution environment. No full DNS regression pass is claimed. Public-header audit, conventions, test registration and whitespace checks pass.
The resolver still uses host DNS; IPv6 host-server discovery and firmware server-count behavior remain debt. Firmware evidence: https://github.com/boykopovar/AnyPS5/pull/9506#issuecomment-6390574180
AI-assisted: yes
FreeBSD's kern_pselect installs the mask and kern_select sleeps with
PCATCH, so a pending signal that the new mask unblocks makes the call
return EINTR once the descriptors have been scanned. Here the handler ran
inside the mask swap and select then waited the full timeout, or forever
with no timeout. The swap now reports whether a handler ran, and pselect
then scans the descriptors once without waiting: a ready descriptor, a
zero timeout or an invalid argument keep select's answer, and otherwise
the call fails with EINTR and leaves the descriptor sets unchanged.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
011010