FreeBSD 11.4 rejects access mode 3 in kern_openat and
O_CREAT|O_EXCL|O_DIRECTORY in vn_open_cred before namei reads the path
or resolves the directory descriptor. open, _open and openat checked a
NULL or empty path first and returned EFAULT or ENOENT for those flags.
InvalidOpenFlags moves to FileFlags.hpp and runs first in all three.
kevent threw for EV_CLEAR on a socket or the read end of a pipe; Boost.Asio's kqueue reactor, among others, registers every socket that way. On Linux such a knote now watches its host descriptor through an edge watch. It is armed when added, on every later EV_ADD or EV_ENABLE while enabled, and by each host wakeup; when armed it is checked with the level-triggered readiness test and reported with the current data and EV_EOF, or disarmed if no longer ready, as kqueue_scan re-runs the filter; reporting it disarms it until the next edge. Waits block on the watch's epoll descriptor, so a socket that stays readable does not wake them. Windows and macOS still throw. GuestSockets::NativeDescriptor exposes the host socket behind a guest one for the watch.
FreeBSD activates an EV_CLEAR knote on each state change the object reports through KNOTE (sorwakeup, sowwakeup, pipeselwakeup), not on its level, so polling the level cannot tell an EV_CLEAR knote when to fire again. EdgeWatch::Watch registers the host descriptor with a private epoll instance in edge-triggered mode: every wakeup of the descriptor with a matching mask (data arriving, buffer space freed, a hang-up) queues one edge, which TakeEdge consumes, and the epoll descriptor itself is readable while an edge is pending, so a wait can block on it. Off Linux opening a watch throws.
WaitForDescriptors always handed the knote's own descriptor to the host wait. A filter that tracks readiness through a descriptor of its own, such as an edge watch, needs the wait to block on that descriptor instead, or a descriptor that stays ready keeps waking the wait. KernelFilter gets a waitDescriptor, and the filter's owner is held for the length of the wait so the descriptor cannot be closed under it.
getrlimit(RLIMIT_NOFILE) reports the host's limits, and libkernel
raised the soft limit to the hard one at load only on Linux. On macOS
the soft limit stayed below an unlimited hard limit (1048576 and
infinity in a shell here, 256 and infinity by default), so the two
differed. XPSemu (PPSA97358) then raises the soft limit to the hard one
in QEMU's os_setup_limits, and setrlimit refuses the change.
macOS fails with EMFILE at kern.maxfilesperproc (10240 here) whatever
the soft limit, even an unlimited one. At load, libkernel now sets both
limits to the smaller of the hard limit and kern.maxfilesperproc, so
getrlimit reports the descriptor count after which opening fails. The
Linux path still raises the soft limit to the hard one.
sceKernelFstat and fstat passed any descriptor to the UCRT's _fstat64, which
raises the invalid-parameter handler for one that is not open. The crash
report installs that handler as fatal, so the calling thread died where the
console returns EBADF. Dying Light 2 (PPSA02262) hits it on a loading thread
right after sign-in.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
Operation 1 threw as unverified, so a title whose call_once path reaches it
stopped. In a payload process on a PS5 (firmware 12.70) operations 0 and 1
fail with EOPNOTSUPP and leave the word unchanged for every word tried,
as FreeBSD 11's __umtx_op_unimpl does. Answer operation 1 like operation 0.
A PS5 (firmware 13.60) reports CPU write 0x2 with CPU read 0x1, 0x80 with 0x40 and 0x200 with 0x100 after a map, sceKernelMprotect, sceKernelMtypeprotect or POSIX mprotect; GPU write 0x20 keeps GPU read 0x10 clear. sceKernelVirtualQuery and sceKernelQueryMemoryProtection now report the protection that way.
On Windows, pipe_nid_postfix configured the anonymous pipe with a 4096-byte buffer. When guest executables redirect standard error to a pipe via dup2 and host logging writes to standard error, the pipe buffer fills during startup before or between guest reader drains, blocking writer threads in ZwWriteFile and deadlocking the title. Increase the Windows pipe buffer capacity to 65536 bytes to match FreeBSD BIG_PIPE_SIZE used by the PS5 kernel, and cover multi-page single-shot pipe writes in guest posix scalar IO tests.
The C runtime allows 512 stdio streams by default, so after about 509
guest fopen/fdopen streams every further stream failed with EMFILE,
including the std::ifstream APR opens for each read, while getrlimit
reports 8192 open files. Raise the limit to 8192 when libkernel loads,
as the Linux build raises RLIMIT_NOFILE.
guest_dynamic_loader and guest_dynamic_loader_fixed_base run the same
GuestDynamicLoader.cpp in the same working directory, and both copy the
module fixture to anyps5-relinked-module-for-test.prx.guest.prx and
anyps5-host-loaded-module-for-test.prx before loading it. Under ctest
--parallel one test rewrote or removed a file the other had mapped:
Bus error, or failed at GuestDynamicLoader.cpp:92. Give both one
RESOURCE_LOCK.
Adrià