FreeBSD sys_flock takes LOCK_UN over LOCK_EX over LOCK_SH, ignores other
bits and fails with EBADF when none of the three is set. The operation
reached the host unchanged, so malformed operations differed between
hosts: Linux rejects them with EINVAL and the Windows lock tracking threw.
Decode the operation before either host sees it.
flock mapped each call straight onto LockFileEx/UnlockFileEx, whose
byte-range locks stack per handle. LOCK_UN without a lock failed with
ERROR_NOT_LOCKED and aborted the process, a repeated LOCK_EX blocked
forever, converting between shared and exclusive failed, and a repeated
LOCK_SH needed as many unlocks.
Track the one lock each descriptor holds: a repeated mode and LOCK_UN
without a lock succeed, a conversion releases the old lock before taking
the new one, and close forgets the descriptor's lock.
AJM's instance and batch tables and APR's file, directory and AMM
state were namespace-scope statics, destroyed by std::exit while the
title's threads keep calling the libraries. A decoder thread then read
a freed instance (an unknown codec), sceAjmBatchWait no longer found
its batch, and APR resolved file ids through a freed vector. The state
is now allocated once and never destroyed.
As requested in review: a failed sceKernelGetModuleInfoFromAddr no longer
reports an empty answer. Adds a failure test (symbol interposition) and
extends the metadata test (EH record walk, terminator, no-header DSO).
Co-authored-by: jweidenh <38249793+jweidenh@users.noreply.github.com>
Co-Authored-By: Claude <noreply@anthropic.com>
A title that ships its own libc.prx unwinds C++ exceptions with that
libc's libunwind, which asks sceKernelGetModuleInfoForUnwind where each
frame's eh_frame is. On Linux the call always reported no tables, so
no C++ exception thrown in guest code could be caught. For the main
executable and .guest.prx images, report the PT_GNU_EH_FRAME tables
that sceKernelGetModuleInfoFromAddr finds, as Windows does from
.ehmeta. Other host images still report none.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HeC9bA3n74TzJRYv9AgBE8
Winsock fails send, sendto and sendmsg on a socket shut down for writing
with WSAESHUTDOWN, which neither Windows error map handled, so libkernel
and libSceNet reported EIO. FreeBSD reports EPIPE there, and the Linux
maps already translate the host's EPIPE to 32. Map WSAESHUTDOWN to 32
in both.
Fill takes either info struct, so sceKernelGetModuleInfo reports the
name and segments sceKernelGetModuleInfoFromAddr reports for the same
image, on Linux and Windows.
sigprocmask keeps the first word of the title's set as it is, where
FreeBSD keeps signal n at bit n - 1 (_SIG_BIT), but Dispatch tested bit
n. A title that blocked SIGTERM with a FreeBSD-built set (bit 14) was
not protected, and a set with bit 15 blocked SIGTERM instead of SIGURG.
Dispatch now tests bit n - 1; the stored mask and the set returned by
sigprocmask are unchanged.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
sceKernelLoadStartModule discarded its arguments, and the relinker's Linux guest writer
synthesized an initialisation trampoline that also cleared the argument registers before
jumping to the module entry point, so a converted module always reached its own start-up
code with args = 0 and argp = NULL.
On PPSA28997 two of the title's own modules validate that parameter block as their first
act and dereference it unconditionally: SaveData faults on `mov (%rsi),%eax` with rsi = 0
beside its `cmp $0x10` size checks, and PSN faults the same way at PSN+0x3ee7 with rbx = 0.
The Windows branch delivers the block, so identical code reports its parameter-version
error and continues instead of faulting.
sceKernelLoadStartModule now records the pair before dlopen and clears it afterwards, and
the emitted DT_INIT stub reads it through two accessors exported by libkernel. The
initialiser is called rather than tail-jumped so its return value can be reported through
*res as the PS5 API specifies. The state is thread_local, which makes the handoff per-call:
ld.so runs a module's initialiser on the thread that called dlopen. DT_FINI keeps a plain
call-through, so unloading neither reads stale arguments nor reports a result.
The accessor names use the _nid_no_patch suffix so the NID resolver leaves them alone and a
guest import can name them exactly.
Retain host backing views for emulator writes and completion labels. Validate full spans, preserve write versions and GPU ordering, and keep the fallback for other mappings. Test remaps, aliases, access checks, partial failures, tracking, view lifetime, and completion ordering.
Written with AI assistance.
EVO-PLAYER (PPSA99039) v0.11.0 stops at sigaction once its earlier
imports resolve: it installs a crash handler for SIGSEGV, SIGBUS and
SIGABRT and a quit handler for SIGTERM, SIGINT and SIGHUP at start-up.
sigaction records the handler, flags and mask of signals 1 to 128 and
reports them back, with FreeBSD's EINVAL cases. signal shares the table
and records SA_RESTART, as FreeBSD's libc does. Plain handlers on the
signals signal already delivers run as signal handlers do; SA_SIGINFO
handlers and other signals are recorded only, and raise of such a
signal throws.
Assisted by Claude Code.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DwFnKjMxmwGDWiuYYf1v4D
Each Windows AIO request is an overlapped ReadFile/WriteFile at the
request's offset, which on a synchronous handle also moves the
descriptor's file pointer; on the console AIO transfers leave it alone.
The requests now go through the positioned path sceKernelPread and
sceKernelPwrite use (NativePositioned in Stdio.cpp, exposed as
NativePositioned_nid_no_patch), which restores the pointer afterwards.
Negative offsets still fail with EINVAL before the transfer.
GuestAio sets the offset to 2 before a write batch and checks it is
still 2 after. TechnicalDebt records that a concurrent read or write on
the same descriptor can see the moved pointer in between, as for the
pread family.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UTjpbMX7BUFMZZaxJE98zV
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