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.
msync follows FreeBSD 11's kern_msync and vm_map_sync over the guest's
mappings as sceKernelVirtualQuery reports them: the address is rounded
down to the page, a range that wraps and MS_ASYNC with MS_INVALIDATE are
EINVAL, an unmapped start or page is ENOMEM, and length 0 checks the
mapping that holds the address. The guest has no file mappings, so a
successful call has nothing to write back. MS_INVALIDATE on a mapped
range throws, since FreeBSD's EBUSY for mlocked pages needs lock state
that is not tracked.
EVO-PLAYER PPSA99039 v0.11.0 imports it.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
sceKernelMunlock and the POSIX munlock unlock the page-rounded range with
FreeBSD's results: 0 for a mapped range whether or not it is locked, EINVAL
for a range that wraps around zero, ENOMEM for an unmapped range. On Linux
the host munlock gives them. On Windows a reserved placeholder counts as
mapped only while the guest reservation or protection registry covers it,
and a region VirtualUnlock refuses as not fully locked is unlocked page by
page, as VirtualUnlock is all-or-nothing. sceKernelMlock shares the range
rounding.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012GLfKH7Sqe51wX254k1XsV
The POSIX form of sceKernelMlock: 0 on success, -1 with errno (EINVAL,
ENOMEM, EPERM, EAGAIN) where the sce form returns the kernel error, as
munmap and mprotect do beside it.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
mprotect changes the protection of guest memory through the same path
as sceKernelMprotect and reports failures through errno: EINVAL for a
null or overflowing range or a range the allocation tracker rejects,
ENOMEM when allocation fails. A zero length succeeds.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A fixed mapping without no-overwrite unmaps the registered pieces it overlaps before mapping, as it already did when the range lay inside registered allocations.
On Linux, direct memory is a memfd mapped MAP_SHARED. amdgpu accepts only
private anonymous memory for a host pointer import (libdrm sets
AMDGPU_GEM_USERPTR_ANONONLY), so every import of direct memory failed with
VK_ERROR_INVALID_EXTERNAL_HANDLE and its ranges were copied.
When a host pointer import fails, the range's memfd slice is turned into a
dma-buf through /dev/udmabuf and imported with VK_EXT_external_memory_dma_buf.
The direct memory backing is sealed against shrinking and growing, as
udmabuf requires. libkernel reports the backing of a guest range through
GuestArenaSharedBacking. Without /dev/udmabuf, or past its size limit, the
range is copied as before. APS5_TRACE_HOST_IMPORT now prints the mappings
behind a failed import on Linux too.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A title maps direct memory with protection 0x3f2, which adds bits
0x100 and 0x200 to the CPU, GPU and AMPR bits, and the mapping threw.
They are the audio coprocessor (ACP) read and write bits, as named in
the KytyPS5 and etaHEN headers. The coprocessor work runs on the host
CPU, so they map to host read and read/write access like the GPU bits.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
MAP_FIXED | MAP_NO_OVERWRITE over a range that already holds an
allocation fails with ENOMEM and leaves the mapping in place, as in
fpPS4's TVirtualManager.check_fixed. UFC 6 (PPSA23566) relies on it to
probe for a free address and aborted on the throw.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* feat(libkernel): implement sceKernelReleaseFlexibleMemory
Unmaps the range through sceKernelMunmap, which returns its pages to
the flexible memory budget, as fpPS4 and prosper do.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* test(libkernel): keep the flexible memory release check apart from the batch map checks
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
The SDK 9 libc.prx heap maps its arenas with flag 0x8000, which threw as
an unsupported flag. The flag is ignored for this function, as sharpemu
does; other unknown flags still throw.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Four sources defined NOMINMAX unconditionally, which redefines the macro the build already passes and warns on every MinGW build. Use the #ifndef guard the rest of the tree uses.
Release direct memory only when the whole range is allocated: a misaligned
start or length returns EINVAL, a zero length succeeds, and a range that
leaves direct memory or covers an unallocated page returns ENOENT without
releasing anything, as in shadPS4. The check and the release run under
the pool lock.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Track the stack range of each running guest thread and answer
sceKernelIsStack from the calling thread's stack (the host limits for an
adopted thread) or from that registry. A mapped address outside every
stack succeeds with null bounds and an unmapped one returns EACCES; the
output pointers may be null.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A range reserved with sceKernelReserveVirtualRange is registered as not
readable, and sceKernelVirtualQuery only searched readable registrations,
so a query inside a reservation fell back to the host and returned EACCES.
Reserved ranges are now tracked until a direct or flexible mapping or an
unmap covers them, and a query inside one succeeds with the reserved piece
as its extent, protection 0 and is_committed clear. PPSA12544's allocator
queries a reservation before committing it and treated the error as a
failed commit, then wrote to the inaccessible range.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
On Windows each direct memory allocation is backed by a page-file
section that CreateFileMappingW commits in full. When the system commit
limit cannot cover it, the title stopped with "create direct memory
backing: Insufficient system resources exist to complete the requested
service", which did not say how much was requested.
The error now states the requested size in bytes and MiB, and the
runtime layout notes in USAGE.md describe the commit requirement and
the page file. Allocation behaviour is unchanged: committing at
allocation matches the console, where allocated direct memory is
always backed by physical memory.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
ForgetDirectMemory erased the physical pages but left g_directMappings entries pointing at the dead backing, so sceKernelVirtualQuery kept reporting is_direct with a stale physical offset. Erase (and split, on the phys axis) the affected mapping tracking on release; mapped views are untouched, so no new faults are introduced.
Lock the guest pages of the range with VirtualLock or mlock, following FreeBSD mlock(2): the range is widened to guest pages, a zero length succeeds, a wrapping range is EINVAL and a range that is not mapped and accessible is ENOMEM. The Windows working set limits and the Linux RLIMIT_MEMLOCK soft limit are raised when the lock needs it.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
libkernel did not export sceKernelMapNamedFlexibleMemoryInternal, which
the libc bundled with SDK 9 titles imports. It now forwards to
sceKernelMapNamedFlexibleMemory: the mapping counts against the flexible
budget, gets the range name and is released by sceKernelMunmap. Older
libc builds call the public function at the same sites with the same
arguments and result handling.
The known callers pass flag 0x8000, whose meaning is unknown. It is
still rejected as an unsupported mapping flag and is recorded in
TechnicalDebt.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Sign-in, web browser and player dialogs finish cancelled; the message dialog finishes at once;
NpAuth, entitlement consumption, reachability, account age and the NpUtility bandwidth test
report signed out; sceKernelMtypeprotect changes the protection (the memory type has no host
equivalent); the APR ForEach resolvers resolve every path and report each failure in its own
result entry. vswprintf's stub is dropped in favor of the existing wide-formatter
implementation, which already covers it on every platform.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
std::tmpfile() places the shared direct memory backing in /tmp, so a
title's direct memory counts against that filesystem's size (a tmpfs is
half of RAM by default): once /tmp fills, touching a backing page raises
SIGBUS. memfd_create gives the same shared memory pages without a
filesystem or its size limit.
Adrià Franch
TibixDev
hikazey
Jan Šlégl
Dean
kjhq
Adrià
Gjon Gojcevic
alfalfa-star
JAB-dev
Chad
Fishybeing
Merijn
Celegans12
Pouare514
DotDebian
Pouare514
boykopovar
SP4C3B4R-8
Michon
Dean Galvin