* [Host] Introduce host platform abstraction with IHostMemory
Add SharpEmu.HLE/Host with IHostPlatform/IHostMemory interfaces, neutral
page-protection/region enums, and a HostPlatform.Current factory that
resolves the Windows backend (or throws PlatformNotSupportedException on
other OSes, matching today's de-facto behavior). WindowsHostMemory wraps
the exact VirtualAlloc/VirtualFree/VirtualProtect/VirtualQuery calls used
across the engine today, with identical MEM_*/PAGE_* constants.
Migrate StubManager as the first consumer: its private kernel32 P/Invokes
and enums are replaced by IHostMemory calls that issue the same two
native operations (RWX commit+reserve of the PLT arena, release on
Dispose). No behavior change.
This is the first step toward supporting non-Windows hosts; subsequent
commits move the remaining direct P/Invokes in Core and Libs behind the
same seam.
* [Host] Route PhysicalVirtualMemory through IHostMemory
Replace the class's private VirtualAlloc/VirtualFree/VirtualProtect/
VirtualQuery P/Invokes with IHostMemory calls. Every site maps 1:1 onto
the exact native call it issued before: MEM_COMMIT|MEM_RESERVE ->
Allocate, MEM_RESERVE -> Reserve, fault-path commits -> Commit, and
MEM_RELEASE -> Free, with identical protection values produced by the
Windows backend.
IHostMemory gains ProtectRaw so the save/restore protection sequences in
TryWriteExclusive and TryTemporarilyProtectForRead round-trip the raw OS
protection word (including modifier bits the neutral enum cannot
represent) exactly as before. Raw PAGE_* constants remain only for the
internal region-classification helpers, which only ever see values this
class itself assigned.
The exact-address free-on-mismatch, lazy reserve-only threshold, prime
loop, and all trace strings are unchanged.
* [Host] Add IGuestAddressSpace and retire the reflection-based allocator lookup
Introduce IGuestAddressSpace in SharpEmu.HLE (fixed-address AllocateAt /
TryAllocateAtOrAbove and guest mprotect via TryProtect) with signatures
copied from PhysicalVirtualMemory, which now implements it. TryProtect
reproduces the read/write/execute decomposition that
KernelMemoryCompatExports.ResolveHostProtection performs, yielding the
same PAGE_* values through the Windows backend.
KernelVirtualRangeAllocator previously located AllocateAt via cached
MethodInfo reflection (because SharpEmu.Libs cannot see Core types) and
walked wrapper memories through an untyped 'Inner' property. Both are
now typed: ICpuMemoryWrapper exposes the decorated memory (implemented
by TrackedCpuMemory, whose Inner property already existed) and the
allocator type-tests for IGuestAddressSpace with the same bounded
unwrap depth. Failure paths keep the exact [LOADER][TRACE] strings.
* [Host] Move Kernel HLE memory exports off direct kernel32 P/Invokes
KernelMemoryCompatExports loses its private VirtualQuery/VirtualProtect/
VirtualAlloc/VirtualFree declarations and MemoryBasicInformation struct:
- Guest mprotect (sceKernelMprotect/sceKernelMtypeprotect) now routes
through IGuestAddressSpace.TryProtect resolved from ctx.Memory. The
orbis read/write/execute decomposition moves into a GuestPageProtection
conversion whose mapping is value-identical to the removed
ResolveHostProtection.
- The guarded libc heap and host-page accessibility checks go through
IHostMemory (same commit+reserve/protect/free sequence; guard-page and
protection-mask checks compare HostRegionInfo.RawProtection against the
same PAGE_* literals as before).
- HostMemory is exposed as a property so merely loading the type never
resolves the platform backend on non-Windows hosts.
KernelRuntimeCompatExports' RDTSC stub allocates its 16-byte RWX page via
IHostMemory.Allocate; the OperatingSystem.IsWindows() gate returning null
is unchanged.
* [Host] Abstract thread, TLS, and symbol primitives in the execution backend
Add IHostThreading (native TLS slots, current-thread id, affinity, raw
thread create/join, diagnostic register capture) and IHostSymbolResolver
(enum-keyed host function addresses baked into emitted stubs), with
Windows implementations wrapping the exact kernel32 calls the backend
made directly before.
DirectExecutionBackend takes an optional IHostPlatform (defaulting to
HostPlatform.Current) and routes every TlsAlloc/TlsFree/TlsSet/GetValue,
GetCurrentThreadId, SetThreadAffinityMask, GetModuleHandle/GetProcAddress
and the suspend+GetThreadContext diagnostic snapshot through it. The
snapshot moves wholesale into WindowsHostThreading (including the Win64
CONTEXT size/flags/offsets, which are Windows-specific by nature) and
returns a neutral HostCapturedRegisters.
NativeGuestExecutor resolves WaitForSingleObject/SetEvent/ExitThread via
the symbol resolver — the same addresses end up in the emitted run loop,
so stub bytes are unchanged — and creates/joins its raw worker thread
through IHostThreading with the same stack-reservation semantics. The
run-loop emitter itself does not move.
Marshal.GetLastWin32Error() in the affinity-failure log still observes
SetThreadAffinityMask's error because the wrapper makes no intervening
SetLastError call.
* [Host] Move fault handling and remaining backend memory ops behind the seam
Add IHostFaultHandling (handler-thunk creation, first-chance handler
install/remove, unhandled-filter set) with WindowsFaultHandling in a new
Cpu/Native/Windows/ folder. The exception-handler trampoline emitter
moves there whole — same pre-filtered NTSTATUS codes, same TEB gs:[8]/
gs:[0x10] stack-limit reads, same host-RSP TLS switch — parameterized
only by (managed callback, TLS slot, TlsGetValue address), which is
exactly what SetupExceptionHandler passed it before. Handler
installation order, the AddVectoredExceptionHandler(first=1) flag, the
SHARPEMU_DISABLE_RAW_HANDLER gate, and all install/teardown log strings
are unchanged.
Every remaining VirtualAlloc/VirtualProtect/VirtualFree/VirtualQuery/
FlushInstructionCache in the backend partials routes through IHostMemory
with 1:1 call mapping (RWX emit -> RX downgrade -> flush for stub
emission, reserve/commit for the PRT aperture and lazy-commit fault
path, raw-protection round-trips via ProtectRaw). HostRegionInfo gains
RawState/RawAllocationProtection so the lazy-commit trace lines and
protection-mask checks keep printing and comparing the exact native
values.
Windows semantics leaked as bare literals become named constants with
identical values: NTSTATUS codes (WindowsFaultCodes) and Win64 CONTEXT
byte offsets (Win64ContextOffsets, with the existing CTX_* constants
aliased to it and handler-local numeric offsets replaced by the names).
* [Host] Resolve the host platform explicitly at the composition root
SharpEmuRuntime.CreateDefault() now resolves HostPlatform.Current once
and passes it explicitly to PhysicalVirtualMemory and (via a new
optional CpuDispatcher parameter) to DirectExecutionBackend, replacing
the implicit default-argument fallbacks. On unsupported OSes boot now
fails at the root with PlatformNotSupportedException and a clear
message instead of on the first native call. A future Linux/macOS
backend plugs in by returning a different IHostPlatform here.
* [Host] Convert the platform backends to source-generated P/Invokes
Replace [DllImport] with [LibraryImport] in the four Windows backend
files added by this branch (WindowsHostMemory, WindowsHostThreading,
WindowsHostSymbolResolver, WindowsFaultHandling). Marshalling stubs are
now generated at compile time instead of JIT-emitted at runtime, which
fits the pre-JIT-everything boot model and keeps the backends
NativeAOT/trimming ready.
Interop stays zero-copy: all signatures are blittable, GetModuleHandleW
now pins the managed string via Utf16 marshalling instead of copying,
and GetProcAddress names marshal through a stack-allocated Utf8 buffer.
Implicit contracts become explicit where LibraryImport requires it:
TlsFree/TlsSetValue gain [MarshalAs(UnmanagedType.Bool)] (the 4-byte
Win32 BOOL DllImport assumed silently), and GetModuleHandle targets the
W entry point directly since LibraryImport never probes suffixes.
The CONTEXT snapshot buffer stays a NativeMemory allocation rather than
stackalloc: CONTEXT requires 16-byte alignment, now documented at the
call site. Native call sequences are unchanged.
* [Host] Address Copilot review: harden failure paths, honor injected platform
- Free the handler thunk page when the RX protection downgrade fails
(the leak predates this branch, but the failure path is boot-fatal so
releasing the page is unobservable).
- TraceThreadMode and the static diagnostics helpers now resolve host
primitives through the backend bound to the current thread, falling
back to HostPlatform.Current only when no run is active (identical on
supported configs, honors injection everywhere a backend exists).
- HostPlatform.Create additionally requires an x64 process so native
Windows ARM64 fails with the promised PlatformNotSupportedException
instead of emitting x86-64 stubs into an ARM64 process.
* [agc] WAIT_REG_MEM suspend/resume, draw packet fixes, new HLE exports, debug cleanup
Rebased onto upstream 79a7437 (par274/sharpemu, rewritten history).
- GpuWaitRegistry: DCBs suspended on unsatisfied WAIT_REG_MEM are re-polled
against guest memory on every submit; fixed 64-bit and standard packet parse
offsets, apply the mask, treat PM4 compare function 0 as "always".
- TryReadSubmittedDrawCount: accept the 5-dword ItDrawIndex2 form emitted by
DcbDrawIndex (count at +4); menu draws were silently discarded before.
- sceAgcDriverSubmitMultiDcbs: reversed ABI (rdi=address array, rsi=dword
sizes, rdx=count).
- VideoOut: vblank events, sceVideoOutGetFlipStatus, buffers registered via
sceVideoOutRegisterBuffers are valid flip targets.
- New HLE: libc stdio (fopen/fread/fseek/ftell/fclose/fgets), Dinkumware
_Getpctype ctype table, NpTrophy2 stubs, AMPR PAK sequential-read tracker,
MsgDialog lifecycle, NGS2 alt NIDs + dummy vtable for handle objects,
guarded memset intrinsic, abort()/strcasecmp null-arg recovery.
- Removed investigation-only code (INT3 breakpoints, qfont/mcpp dumps,
error-candidate printf traces, unconditional debug logs).
First rendered frame: Quake (PPSA01880) presents a 1920x1080 guest frame.
* Implemented a guarded native intrinsic (rep movsb) in DirectExecutionBackend to bypass HLE dispatch overhead, while preserving memory safety checks.
* [hle] clock_gettime clock ids, AudioOut2 canary fix, NID rebinds, new offline stubs
- clock_gettime (lLMT9vJAck0): support CLOCK_SECOND and the *_PRECISE/*_FAST
variants instead of returning EINVAL, which games treated as fatal and
retried in a tight loop.
- AudioOut2: context param writes shrunk to the guest-observed layout (the
old 0x80-byte reset smashed the stack canary at +0x60 and killed audio
init); ContextQueryMemory writes the single u64 the caller expects.
- NGS2: dropped wrong alt-NID aliases (they hash to sceImeUpdate,
sceMouseRead, sceSystemGestureUpdateAllTouchRecognizer - now bound in
their real libraries); added sceNgs2PanInit; fixed VoiceGetState NIDs.
- New verified stubs: sceUltInitialize, sceNpUniversalDataSystemDestroyHandle,
sceNpGetOnlineId, sceNpGetNpReachabilityState, sceImeKeyboardOpen,
sceImeKeyboardGetResourceId, sceMouseOpen, sceKernelAprGetFileSize.
- Import gateway: unwind guest workers at dispatch during backend teardown;
env-gated SHARPEMU_LOG_THREAD_MODE tracing.
* [cpu] Isolate guest execution on native worker threads
Guest entry stubs no longer run above CLR-managed frames: each run is handed
to a pooled raw OS thread whose loop is emitted native code. While guest code
executes there is not a single managed frame on the thread and it stays in
preemptive GC mode, so the GC never walks a frame chain interleaved with
guest stubs that carry no CLR unwind info (the ReversePInvokeBadTransition /
UnmanagedCallersOnly FailFast class of crashes on pumped guest threads).
- NativeGuestExecutor: CreateThread + emitted run loop (WaitForSingleObject,
UnmanagedCallersOnly prologue/epilogue, entry stub call, SetEvent). The
prologue rebinds guest TLS, the host-RSP slot, thread affinity and the
Active* ambient per run, so workers carry no guest identity and pool
freely; the orchestrating managed thread parks in a preemptive wait.
- All three entry sites route through RunGuestEntryStub: guest thread
entries, blocked-continuation resumes, and the main ExecuteEntry.
- Teardown stops workers before any executable stub or TLS index they
reference is freed; a worker that will not stop leaks its loop instead of
freeing running code.
- Kill switch: SHARPEMU_DISABLE_NATIVE_GUEST_WORKERS=1 restores the inline
calli path.
Gutemberg Ribeiro
Foued Attar