On Linux a guest stderr redirect also moves the host's: guest
descriptors are host descriptors, and the guest stderr stream wraps the
host stderr FILE. After dup2(fd, 2), or freopen(path, mode, stderr) with
full buffering, the libc terminate report, the host fprintf(stderr)
diagnostics and libstdc++'s terminate message go into the title's pipe
or file, and abort() discards what is still buffered. RetroArch
(PPSA99169) reopens stderr onto app0/trace.txt with full buffering, so
its stop on main left no message anywhere.
Before the first guest redirect of descriptor 2 (libkernel dup2, libc
freopen of a stream on descriptor 2), keep a close-on-exec duplicate of
the host descriptor 2 and point the host stderr at an unbuffered stream
on it. The guest stream keeps its own FILE and follows the redirect.
The libc terminate report writes to the kept descriptor with write()
instead of the stderr stream, and libkernel's sceKernelDebugOutText uses
the same kept descriptor.
Titles check for a plugin with sceKernelStat before loading it through the engine path. The relinker emits only X.prx.guest.prx, so the check failed and PSNCore started with the raw (0, NULL) arguments. Share the dlopen mapping with sceKernelStat, read-only sceKernelOpen and sceKernelCheckReachability when the original name is absent.
fopen opened its stream with _wfopen, which shares read and write
access but not delete access. While the guest held a stream open,
rename of its file failed with EIO and remove with EBUSY. POSIX rename
and remove work on open files, as on Linux and FreeBSD, and since
#3677 the descriptors sceKernelOpen returns share delete access.
fopen now creates the handle with CreateFileW sharing read, write and
delete, with the access and creation disposition of the mode, and
wraps it with _open_osfhandle and _wfdopen, keeping append mode. A
failed CreateFileW sets errno through the error mapping #3677 added to
libkernel's NativeOpen, which moves to libc as
WindowsOpenError_nid_no_patch so that both use it. freopen still
reopens through _wfreopen; TechnicalDebt records it.
Guest paths were normalized lexically before they reached the host, so
"missing/../file" and "file/../x" dropped the component before "..":
stat and open succeeded on the file, unlink deleted it and rmdir removed
a directory, where FreeBSD's lookup() resolves ".." with VOP_LOOKUP in
the directory reached so far and fails with ENOENT for a missing
component and ENOTDIR for a file. POSIX path resolution (XBD 4.13) says
the same.
".." is still collapsed lexically when the path before it is an existing
directory, so case-insensitive matching and aliases behave as before.
When it is not, the rest of the path is passed to the host unchanged and
the host resolves it. Linux then reports ENOENT or ENOTDIR as FreeBSD
does; Windows collapses ".." itself, so its results are unchanged.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XYhZu5HokHMo9mfi8QU83m
FreeBSD fchdir(2) changes the working directory to the directory referenced by a descriptor. The guest imports fchdir from libkernel_sys (PPSA99764, issue #1578) and the module did not export it.
The descriptor's directory is resolved from the path recorded when the directory was opened on Windows, and from the /proc/self/fd link target on Linux. The guest working directory is then set through the libc routine shared with chdir. A descriptor that is not open returns EBADF and one that is not a directory returns ENOTDIR.
AI-assisted: yes
(cherry picked from commit 76329cbb08781e13d757c3ff955acf71f8bd506f)
On Linux, sceKernelSync called sync(2), which blocks until all
dirty pages are written back. Unrelated host I/O can stall guest's
sceKernelSync, causing the guest_kernel_sync test to stall for minutes.
Share the Windows implementation instead.
Fsync each recorded path and its changed parent directories.
Use st_mtim and coarse realtime mark on Linux in place of FILETIME.
getcwd(NULL, size) returned memory from the guest heap directly, while
the caller frees it with free(), which goes to the application heap.
With a title's malloc replacement registered, that free reached the
replacement with a pointer it never returned. Allocate from the
application heap like strdup, and report ENOMEM when it returns null.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Resolve ASCII case differences in guest paths and mount aliases while preferring exact names and rejecting ambiguous fallback matches. Preserve new filenames and host roots. Five filesystem tests pass; Skyrim now loads its INI and shader archives, initializes Vulkan and uploads intro textures instead of dereferencing null shader metadata. Written with AI assistance.
Preserve files across unmount, block new lookups until remount, and validate mount-dependent operations. Keep prior-run storage inaccessible after initialization.
Written with AI assistance.
Opening a volume needs administrator rights, so the volume flush skipped
every volume in a normal user session. The libc, libkernel, save data and
app content file functions now record each host file and directory they
change. On Windows sceKernelSync flushes the recorded paths that changed
since the previous call, plus their changed parent directories, through
handles a normal user can open. Linux still calls sync().
sceSaveDataSetParam dropped the params, and sceSaveDataGetParam and
sceSaveDataDirNameSearch returned zeros, so a title that checks the params of
the save it found took its profile for a new one and rewrote it with defaults
on every boot. The params now live in a <directory>.param sidecar next to the
save directory, written by SetParam (mtime refreshed) and returned by GetParam
and by the directory search, with the directory's write time when no param
was stored yet.
The mount point is /savedata<N>, as on the console: a title read its profile
through /host//_sm/0/Profile when the mount point had another shape, and that
path does not exist.
The module logs the first three calls of each entry point, like the core
module; APS5_SAVEDATA_TRACE lifts the limit.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Brings in main up to 9958d26 (homebrew runtime, POSIX wrappers in
libkernel, sce_module guest modules and --skip-sce-module, the --to-intel
general pipeline, libSceRandom, libSceRtc, libScePosixForWebKit,
libRenoirCore, test wiring).
Resolutions where both sides implemented the same thing:
- libkernel pthread: main's structure (lazy static initialisation,
destroyed markers, MutexOperations/CondOperations, mutex protocol and
condattr clock) with this branch's TimedWait deadlines and condition
(precise timed lock/wait on Windows), wait tracing, the adaptive mutex
type 4, POSIX default ERRORCHECK mutexes, EDEADLK/EPERM results instead
of throws, and condition clocks honoured for absolute timeouts.
- libc locale: the guest Dinkumware ABI (_Locimp, facet vtables, short
ctype/case tables, locale ids, stream storage) is kept because guest code
inlines those layouts; main's C character functions are kept on top.
- libc stdio/strings/math: main's stream functions (guest FILE status
sync), strerror/perror, remove, formatting, string and math exports win
over this branch's duplicates.
- libc paths: main's working directory with this branch's path aliases
resolved on the normalised guest path.
- libkernel file: this branch's sceKernel* results as SCE errors, main's
POSIX wrappers and both fstat helpers.
- relinker: this branch's stub lowering keeps its trampolines through the
main executable path; guest modules refuse lowerings that need stubs.
- AGC driver: main's rendering wait is executed by this branch's workers.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0177gthrWEBBfBu5xJDXgBfo
- libc: reserve guest memory in one arena below the PS5 map limit with
MEM_WRITE_WATCH (GuestArena) and a caching guest heap; the allocation
registry gains a generation counter, an invalidator callback for the
driver's page cache and a pin waiter for leased ranges. This replaces
the fault-based GuestMemoryTracking/GuestMemoryBacking layer, whose
files are removed.
- libkernel: mmap/mprotect/munmap on the arena, flexible memory budget,
real sceKernelVirtualQuery; POSIX pthread layer, rwlocks, timed locks,
TSD, event flags; 0.5 ms scheduler tick and high-resolution sleeps;
TSC/clock/time functions; file APIs return SCE errno codes; the APR
file-streaming API.
- libc: vectored crash reporter with backtraces for fatal exceptions,
SIGABRT, UCRT invalid parameters and process exit; SSE4a EXTRQ/INSERTQ
emulation for Intel hosts; %ls/%lc/%S/%C with the guest's 16-bit
wchar_t; hand-written setjmp/longjmp for the guest jmp_buf; a path
alias table for short save-data mount points; more string, stdio and
math exports.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0177gthrWEBBfBu5xJDXgBfo
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