The raw-byte check that runs before a syscall pattern between PS4 unwind
functions is skipped now also accepts mov rax, imm64, merges a following
mov al, imm8 or mov ax, imm16 into the earlier constant, and walks back
over any number of register moves or zeroings that leave rax alone
instead of at most seven. Visited states keep the walk linear in the
bytes it covers.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A registered type-3 hull program holds the local and the hull part of a
tessellation draw in one binary, addressed through SPI_SHADER_PGM_LO_LS
(SH 0x148) with no SPI_SHADER_PGM_LO_HS: the local part runs on the lanes
below s3[7:0] and writes LDS, an s_barrier follows, and the hull part runs
on the lanes below s3[15:8] and may store the registers the local part
filled. The draw decode asked 0x148 for a type-5 local half, and
PPSA11386 (007 First Light) stopped in its level load with "registered
program refers to an incompatible shader binary type".
The draw decode now gives a registered type-3 program both the local and
the hull role and marks the tessellation configuration mergedHull. The
local stage only passes gl_VertexIndex and gl_InstanceIndex in a 16-byte
record. The hull stage runs the whole program, one invocation per output
control point: v2 and v5 come from the record of control point
min(gl_InvocationID, inputs - 1), v3 is the relative vertex id, and the
LDS becomes a per-control-point output array that a control point writes
in its own record and reads in any record of its patch after the barrier.
Registers live across the barrier stay in the invocation.
The hull stage of a merged program runs at one lane per invocation on
every device (HostSubgroupSize 1). Its lanes are gl_InvocationID, not host
subgroup invocations, so the s_cbranch_execz around the local part tests
the invocation's own lane. With the device's subgroup it took a subgroup
ballot, and lavapipe, whose subgroup stages lack the tessellation control
stage, rejected the draw ("subgroup capability 61 is unsupported for
shader stage 2").
The lowering refuses more input than output control points, LDS writes
outside the own record, reads outside the patch's records, barriers that
some invocations do not reach or that sit in a loop, reads or writes of
another lane's register, outputs beyond the device limits, and fetch
subroutines. Type 3 is prepared with its stage group like type 5 and
takes its float mode from RSRC1_HS. The hull user-data address (SH
0x102/0x103) is optional for a merged program: s[0:1] take it, unchecked,
when the draw sets it and are zero otherwise.
Both stages refer to one binary, so a draw lists each code and header
region once (AppendProgramMemory); a request's memory regions must not
overlap. An indirect draw's record words go into every program whose user
data holds the register, so the hull stage of a merged program reads
them too.
mergedHull is part of the recompile cache key, the draw decode comparison
and the request serialization (version 39).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A relocation or lea target outside the unwind functions of a PS4 image
is now decoded up to its first jump, return or trap, or to the start of
the next unwind function, which also bounds the transfer check of the
tail rule. A target whose run holds an fs:[disp32] access, the form the
linear TLS sweep roots, is followed as code. The other targets taken as
data are counted in one message and kept as entry points that the
Windows TLS rewrite may not overwrite. The analysis merges nested
unwind ranges like the scans.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The skip of syscall patterns outside the unwind functions let some real
syscalls through. The scan now merges nested and overlapping unwind
ranges with the instruction scanner's MergeCodeRanges, so a pattern
inside an outer function is refused. A constant syscall number is also
looked for in the bytes in front of the pattern, whatever alignment the
decoding took: a mov eax, mov rax or xor eax, eax that ends at the
pattern or before register moves and zeroings that leave rax alone. The
decoded lookback requires each instruction to end where the next one
starts. Guest modules without PT_SCE_DYNLIBDATA get no unwind ranges,
so their scan stays strict even when their unwind table is read.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The code analysis of the Windows and macOS outputs followed every
relocation and lea target inside the code range as code. PS4 images keep
read-only data between unwind functions, and strings and tables there
decoded into garbage, failing the conversion. Outside the unwind functions
such a target is now code only when it is 16-byte aligned, starts less
than 256 bytes after an unwind function and decodes to a jump, return or
trap; lea targets go through the same rule instead of the graph's own.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
In a payload process on a PS5 (firmware 12.70), sysctlbyname returns -1
with ENOENT for thirteen names that threw here, and leaves the buffer and
the length alone, for a read, a size query, a null length and a null
buffer with a null length. sysctl does the same for the fixed MIBs of
seven of them. sysctlnametomib gives those seven MIBs and returns ENOENT
for hw.cacheline_size and hw.usermem, which threw too.
machdep.cacheline_size already returned ENOENT and is now tested with
the others. A write to the new names and MIBs throws, as the console's
answer to a write was not tried. The hw.realmem and vm.overcommit debt
entries now say that a payload process gets ENOENT for them as well.
AI-assisted: yes
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
kevent threw for EVFILT_WRITE on any descriptor that is not a socket. On the write end of a pipe it now follows FreeBSD 11's filt_pipewrite: data is the free buffer space, and once the read end is closed the event reports EV_EOF with data 0. Adding the event after the read end is closed fails with EPIPE, as in pipe_kqfilter. EVFILT_WRITE on the read end still throws, because FreeBSD's pipe ends are bidirectional and host pipes are not.
Yuri Olive