Rosetta sets RDTSCP's ECX to its constant TSC_AUX, 0xAAAAAAAB, which is
not a processor index. --to-rosetta already makes RDPID return processor
0 for the same reason, so code reading the processor through RDTSCP saw
a different value from code reading it through RDPID.
--to-rosetta now moves RDTSCP into an optional stub that runs the
instruction unchanged and then loads 0 into ECX with a MOV, which
leaves the counter in EDX:EAX and the flags as they were. A site with no
movable instruction after it for the jump is kept, as for RDPID. The
Intel target and a plain relink are unchanged.
The RDNA2 ISA (8.1.7) ignores the two low address bits of dword or wider
non-formatted accesses in alignment mode DWORD. MXGP 26 (PPSA30839) sets
bits with buffer_atomic_or at odd byte offsets, which recorded an
unaligned BDA fault and dropped the atomic. A 32-bit buffer atomic now
acts on the dword that holds its address; 64-bit atomics off an 8-byte
boundary still fault.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
10_11_11_UNORM (format 30) images are read and written through an
R32_UINT view, so the hardware sampler cannot filter them. image_sample
of a 2D or 2D array view now fetches the one or four texels at LOD 0,
decodes them and blends them in the shader, with bilinear weights on
the 8-bit grid, for point or bilinear filtering with wrap or
clamp-to-edge addressing.
A shader gets the converted sample mode only after a converted
descriptor reaches one of its sampled images: that capture throws
ConvertedSampleRequired and the driver prepares the program again
with GuestContext::convertedSamples.
The R10_G11_B11 float format is sampled natively since #7271 and keeps
its refusal on the converted path.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
An adopted thread (the main thread, or a host thread that calls
scePthreadSelf) reported its whole Windows stack reservation, and so
did sceKernelIsStack on a host thread before adoption. A relinked
executable reserves 0x210000 bytes for its main thread and commits the
top 0x200000, so the lowest 64 KiB of the reported stack hold only
reserved pages and Windows' guard pages. mprotect fails there, so
HotSpot in Java 25 LAN / DNS (PPSA99869) could not create the main
thread's stack guard pages ("Attempt to allocate stack guard pages
failed").
When everything above the bottom allocation granule is committed
read-write, the host stack is now reported from there, as created
guest threads report only their committed stack. Other host stacks
keep the whole range. The committed-pages walk is shared with
StartNativeThread and throws when VirtualQuery fails.
The console's libSceLibcInternal.sprx (measured on firmware 12.70 in
#7549) prints %p as bare lowercase hex without a 0x prefix, prints 0 for
a null pointer, ignores #, + and the space flag, counts only the digits
towards the width, pads with spaces on the left (on the right for - and
with zeros for 0 when there is no precision), treats the precision as
the minimum number of digits, prints nothing for a null pointer under
%.0p, and accepts the l length. FormatPointer instead followed FreeBSD
and printed 0x..., which is what a title does not see on hardware.
FormatPointer now prints the digits alone, the narrow Windows formatter
accepts %lp, and Linux routes %p and %lp to the guest formatter instead
of glibc, which prints the FreeBSD form and (nil) for a null pointer.
The wide family still refuses %lp, because the console's swprintf was
not measured with it; it returns -1 as it does for any other conversion
the formatter rejects. The debt note records the pointer cases the
console was not measured with and what the Linux routing means for a
format that mixes %p with a refused conversion.
sceSystemServiceLoadExec found its own executable through /proc/self/exe
and replaced the process with fexecve after close_range, none of which
macOS has, so on macOS every call except "exit" threw. On macOS:
- the running executable's path comes from _NSGetExecutablePath, resolved
with std::filesystem::canonical, as libSceNpEntitlementAccess and
libSceFont already do;
- the target must be an x86-64 Mach-O executable (MH_MAGIC_64,
CPU_TYPE_X86_64, MH_EXECUTE) that the user may run;
- macOS has no fexecve, so the process is replaced by path with
posix_spawn and POSIX_SPAWN_SETEXEC; POSIX_SPAWN_CLOEXEC_DEFAULT closes
every descriptor but the standard streams, as close_range does on Linux;
- before the replacement the exit starts and the shutdown callbacks run
(LibcStartExit, then LibcRunShutdown), as on Linux, so guest threads
that call a stopped library wait instead of unwinding;
- descriptor 2 gets the host standard error back before the replacement,
as on Linux, and guest_system_load_exec_standard_error runs on macOS.
A launch without arguments keeps the Linux execv path, which macOS has.
guest_system_exit finds its own executable the same way on macOS.
A read event on a listening socket took its data from FIONREAD, which a listening socket refuses on Linux, so kevent and sceKernelAddReadEvent reported 0 connections while saying one was ready. FreeBSD 11.4 gives a listening socket filt_solisten, which reports so_qlen, the completed connections waiting for accept. Ready now checks SO_ACCEPTCONN and on Linux reads a TCP listener's accept backlog from TCP_INFO, where tcp_get_info puts it in tcpi_unacked; with no host call for the count (Windows, macOS, a listener that is not TCP) it reports 1, the lower bound the readiness already implies.
Onimusha: Way of the Sword (PPSA27836 01.000.001) imports
_ZSt26__throw_bad_variant_accessv (9G6z-nF6njg) from libc, and its
bundled libc.prx does not export it, so the title fails to load with
an unresolved import.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01GtXavMkgCTCdmRpweviHcQ
A mounted folder uses the junction reparse tag and would otherwise be returned as a relative Volume GUID path. Only a drive path is reported, through the absolute-link text helpers.
A vertex or tessellation evaluation program whose PA_CL_VS_OUT_CNTL
enables eight guest clip distances (CLIP_DIST_ENA 0xff, both distance
vectors) failed to compile with "guest clip distances plus the all-zero
clip position distance exceed 8 clip distances", at registration and at
the draw. A program whose guest clip and cull distances together take
eight (four of each, say) compiled, but its draw failed in the pipeline
validator with "more than eight clip and cull distances in one shader".
The all-zero position distance is now added only while the guest clip and
cull distances leave one of the eight slots free. Otherwise the program
keeps its guest distances, and a primitive with a vertex at clip position
(0,0,0,0) is not removed; the EmitSetAttribute debt entry says so.
agc_position_invariance compiles one program with seven and eight clip
distances, and with three and four clip distances beside four cull
distances: the clip distance arrays are 8, 8, 4 and 4, so the all-zero
position distance is in the first and third only.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
A queue that delivered an end-of-pipe interrupt from its own release stopped
delivering the flip's event for the rest of the run, so a title that raises a
release interrupt once and then waits on the flip event never saw it again.
Count the flips a queue has taken since its last delivered release interrupt:
four consecutive flips keep the latch, a fifth clears it and raises the event,
so the queue recovers within five flips. Gran Turismo 7 (PPSA01317) pairs two
flips with one release interrupt per frame, which stays under the limit, and a
title that flips without further release interrupts recovers.
Extend agc_driver_eop_interrupts: a latched queue still delivers its own
releases, flips keep reaching the video output while their event is suppressed,
an event returns once the latch clears, and a release followed by two flips
raises none.
ARCHITECTURE.md and the libSceAgcDriver debt entry now say that a
settled Windows import under 1 MiB returns to the write watch only when
no storage image overlaps it, and why.
Karim Masmoudi