PPSA50011 imports setpriority and stops at start-up once getpriority is implemented. Accept PRIO_PROCESS, PRIO_PGRP and PRIO_USER for the guest's own process and fail with ESRCH for any other id and EINVAL for any other which, leaving errno unchanged on success like FreeBSD's libc; the value is not applied, since the guest nice is not the host's scheduling class.
PPSA30601 imports these without a known signature. The mangled names
give them: Pair's constructor deep-copies its key and value into the
layout Object iteration already returns and its destructor frees both,
Array::iterator gets its default constructor, copy assignment and
post-increment (returning the copy through a result pointer, as begin
does), and MemAllocator::notifyError is the base class's empty virtual.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Dh1MhYBFyzxRceoAxrepZ6
A multisampled color target keeps its samples only in its host image, and every guest read of its
color memory that the driver checks is refused (RequireNoMultisampleTarget). A uniform compute fill
over exactly its color memory with an exact clear value becomes the target's clear through
NoteColorMetadataFill, so BufferFill no longer stores it into the host import as well.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
A leaf's body ran from its start to the next known start or int3 padding,
so a function reached only through a pointer, placed right after the leaf
without int3 padding, was framed as part of the leaf: its rsp operands were
moved and its exits raised rsp although nothing had lowered it.
The body now also ends at 16-byte-aligned code after a ret or ud2, and at
the target of a jmp when only padding lies between them (a tail call to the
next function). Code past such a point is framed only from a real start.
A leaf whose code continues past it is skipped as branching out of the
function. Aligned code after any other jmp stays in the body: loop headers
are aligned there, and cutting after every jmp skipped 2,129 of 2,131
framed leaves in PPSA01556. With this cut 2,132 are framed, and none of
them has rewritten bytes in another function of the unwind table.
FreeBSD's setjmp saves the signal mask at 72 in the jump buffer and its
longjmp restores it, unlike _setjmp and _longjmp. Ours kept only the
registers, so a longjmp back from code that changed the mask, such as a
signal handler, left the mask as it was. libc can't call libkernel, so
libkernel registers its sigprocmask with libc when it loads.
A registered range larger than 64 MiB is imported one 64 MiB window at a
time for buffer and fill accesses instead of whole, and the live imports
stay under a budget: APS5_HOST_IMPORT_MIB, else the larger of 6 GiB and
half the physical memory, at most the largest host heap less 2 GiB
(imports and type-3 mirrors share it; #167's rule). An import past the budget
retires the least recently used imports not used in the last 256
lookups.
- An access across window edges imports the cells it touches, grown to
the union of the range's imports it overlaps, so uses across
neighbouring edges share one import instead of replacing each other.
- An address-based build (AcquireRegistered) imports the range whole; a
window over its first byte does not serve it.
- Every refusal (alignment, a failed run, a held import, the budget with
what may be evicted) is decided before anything is retired.
- An import made when a range is mapped never evicts: the map observer
holds no GPU lock.
The window size and the budget have setters for the tests.
The mimalloc in PS5MC (PPSA99420) reads vm.overcommit at start-up and
stopped on the unsupported name. It reports FreeBSD's default, 0.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
Borderlands 4 (PPSA01494) loads its UI library with
sceKernelLoadStartModule("/app0/prx/libRenoirCore.PS5.prx"), but ships
the module as prx/librenoircore.ps5.prx. On Linux the call fails:
Could not load /app0/prx/libRenoirCore.PS5.prx result 0, handle result -2147352574
(0x80020002, ENOENT). Guest paths are resolved case-insensitively, but
that only finds a component that exists. With the documented layout,
app0/prx holds only the converted librenoircore.ps5.prx.guest.prx,
so the requested name resolves to itself and RelinkedModulePath then
looks for "libRenoirCore.PS5.prx.guest.prx" with its exact spelling.
Windows and macOS hosts ignore the case, so only Linux is affected.
RelinkedModulePath now falls back to the same ASCII case-insensitive
match as ResolveHostPath when the exact <name>.guest.prx is missing,
and throws for an ambiguous match as that does. dlopen,
sceKernelLoadStartModule, stat, open and sceKernelCheckReachability all
go through it.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
Guest path resolution trimmed the trailing slash of a path under a
mount alias (/savedata0, /download0, /app0 and the others), so the host
saw "file" for "file/": unlink, remove, sceKernelUnlink and rename
removed or moved the file, open opened it, and chmod and access
succeeded on it. The same path outside an alias already failed with
ENOTDIR, because the host got the slash.
FreeBSD 11.4 rejects it in lookup() (sys/kern/vfs_lookup.c):
/*
* If we're processing a path with a trailing slash,
* check that the end result is a directory.
*/
if ((cnp->cn_flags & TRAILINGSLASH) && dp->v_type != VDIR) {
error = ENOTDIR;
goto bad2;
}
On Linux and macOS a path under an alias now keeps its trailing slash
on the host path, as paths outside an alias do, so the host fails with
ENOTDIR for a file and directories with a trailing slash still work.
Windows keeps the previous behaviour; TechnicalDebt records it.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
The dolphin_libretro core of RetroArch (PPSA99169) reads {CTL_HW,
HW_REALMEM} as the machine's memory size and stopped on the unsupported
MIB. It reports the same value as hw.physmem.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
PS5CEMU-HAR (PPSA99360, ps5-payload-dev build, relinks with
--trap-sdk-syscall-stubs) imports the data objects sys_siglist
(yCdGspbNHZ8) and sys_nsig (ZD+Dp+-LsGg) from libSceLibcInternal.prx;
the import audit lists both as absent (registry entries 364 and 378,
after pthread_setaffinity_np at 276). No run has reached them yet; the
predicted stop line is
FAIL: unresolved ELF import ZD+Dp+-LsGg (sys_nsig) from libSceLibcInternal.prx
or yCdGspbNHZ8 (sys_siglist), whichever the loader resolves first.
The table and count are FreeBSD 11.4 lib/libc/gen/siglist.c (8c639945):
32 descriptions, signal 0 to SIGUSR2 (NSIG 32), and sys_nsig is their
number, 32. ps5-payload-dev declares both as objects exported by
libSceLibcInternal and its strsignal reads them.
Co-Authored-By: Claude Fable 5.1 <[email protected]>
Map fixed private anonymous ranges through the existing guest arena. Preserve occupied ranges for MAP_EXCL and use FreeBSD 11.4 errors.
Cover replacement, exclusivity, range validation, rounding, and memory access.
A direct memory page mapped at one guest address now lives in private
MEM_WRITE_WATCH memory at that address, and its writes are collected with
GetWriteWatch like flexible memory: no fault is raised. A page mapped at a
second address moves its whole resident run into the section, behind a
read-only fence while it is copied, and every address becomes a view of it,
tracked by write protection. Unmapped resident pages that are not blank are
kept in a private reservation until they are mapped again, not in the
section.
Ported onto main's 4 KiB subpage tracking of shared views: resident runs
keep a per-page collected bit and enter the fresh ranges, so Fresh and
Armed collections select them like shared views; a demoted run carries its
collected bits into the views and reports every page once. MapAlias throws
through refuse() when a resident run extends outside the aliased range, and
the caller keeps main's fallback.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01V1W4jdNSKTV7xwuS6xQPJV
A bound buffer is joined across adjacent registered ranges only when every
one of them is larger than the 8 MiB window. PPSA25344's loading binds 16 MiB
and 4 MiB buffers whose backing was registered in two to six adjacent
pieces with the same access, some of them smaller than the window, so each
use of such a buffer was copied on the CPU: up to 348 GB in the first 300 s
of loading.
A bound buffer that starts at the first crossed range's start and ends at the
last one's end now joins those ranges whatever their size. A heap grown in
pieces matches that only for a binding over exactly its current pieces, so
growth beside a joined import does not re-import it. joinedCovers, used when a
joined import retires, accepts any adjacent run of ranges.
importJoinTests binds exactly over two 64 KiB pieces of a partly filled
window and requires one import of both; a binding across them that starts
inside the first piece stays apart.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
Dean