The additive event_log extraction tracer needs a current-thread lookup that
returns nullptr instead of asserting when called from boot code before any
XThread exists (GetCurrentThread asserts on non-guest threads). New read-only
static accessor over the thread-local; no behaviour change. Fixes the native
Linux build of the phase-a args/file.read tracer.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
- Change OddObj to X_DISPATCH_HEADER
- Add unknown X_KWAIT_REASON flag
- Fixed InitializeGuestObject mistake
- Replaces unknowns in kthread using nukernel as reference
When a thread wakes from a kernel wait, the Xenon scheduler boosts its
effective priority by the increment passed to the signaling call
(KeSetEvent, KeReleaseSemaphore, KeReleaseMutant). The boost is clamped
to the per-thread max_dynamic_priority cap, respects the guest
boost_disabled flag, and is drained on the next quantum expiry.
Guest KTHREAD priority fields are now initialized from parent process
defaults, and the previously unknown fields involved have been renamed
to match their identified purpose.
And default ignore_thread_priorities to false.
Map Xenon's 0-31 priority range across all 5 host priority levels
instead of collapsing 0-17 into kNormal.
Use timer-driven quantum decay (~20ms period) matching Xenon's
60-quantum / 3-per-tick cycle to prevent starvation by gradually lowering
effective priority for non-real-time threads (< 18), piggybacking on the
existing 1ms timestamp timer.
Most non-Windows code paths use standard POSIX APIs (sockets, signals,
dlopen, threading) that work on any POSIX platform. Change Linux-specific
guards to !WIN32 or #else where the code is portable. Linux-specific
APIs (SIGRTMIN, Vulkan/X11, fontconfig/GTK) remain Linux-guarded.
Generate per-function CIE+FDE records and register them via
__register_frame so the C++ exception unwinder can propagate through
JIT frames. Replace setjmp/longjmp fiber reentry with throw/catch
on Linux to ensure destructors and RAII guards run during fiber
stack switches.
add typed guest pointer template
add X_KSPINLOCK, rework spinlock functions.
rework irql related code, use irql on pcr instead of on XThread
add guest linked list helper functions
renamed ProcessInfoBlock to X_KPROCESS
assigned names to many kernel structure fields
… over to referencing state through ppc_context as much as possible, it'll make implementing things like kernel processes much easier in the future
Move forward definitions of kernel types into kernel_fwd.h
Stub implementation of XamLoaderGetMediaInfoEx
Partially implement XamSetDashContext
implement XamGetDashContext
Stub implementation of XamUserIsUnsafeProgrammingAllowed
Stub implementation of XamUserGetSubscriptionType
Expanded the supported object types for ObReferenceObjectByHandle and wrapped the logic for encoding the type in a constexpr function
ObReferenceObjectByName was taking lpstring_t for first param, but the function actually takes X_ANSI_STRING ptr
NtReleaseMutant actually does not return anything from KeReleaseMutant, it just checks the handle and returns whether it was invalid.
Changed the raise/lower irql functions to just set the irql on the pcr instead of setting it on field of Processor, processor is a shared object and irql is per-thread
Semi-stub implementation of KeGetImagePageTableEntry. I locked at it in the HV and got it so the values are in the same range the HV returns + actually reflect the page & memory range, but i doubt its equal to the values the hv returns on real hw. Used by modern dashboards, don't know for what.
Log error message for ObDereferenceObject w/ null ptr.
Allocate a special fixed page that dashboards reference, currently don't know what the data on that page is supposed to be.
Add current_irql field to X_KPCR
Added Device object member of XObject::Type enum
Added some notes about other gpu registers, found a table of register names and indices in xam
stub XeKeysGetConsoleType
Removed the breakpoints in HandleCppException and RtlRaiseException until we have a real implementation of them. Some apps can continue fine afterwards.
Stub version of HalGetCurrentAVPack
Implement MmIsAddressValid
Implement RtlGetStackLimits
Add constexpr getters to magicdiv class so it can be used from jitted x64/dxbc
Track the guest return address as well for guest/host sync, if multiple entries have the same guest stack find the first one with a matching guest retaddr. this fixes epic mickey 2 (which the previous guest-stack change had allowed to go ingame for a bit) and potentially also a crash in fable3.
Break if under debugger when stackpoints are overflowed
Add much more useful output for host exceptions, print out xenia_canary.exe relative offsets if exception is in module, formatmessage for ntstatus/win32err, strerror
Minor d3d12 microoptimization, instead of doing SetEventOnCompletion + WaitForSingleObject do SetEventOnCompletion w/ nullptr so that the wait happens in kernel mode, avoiding two extra context switches
add unimplemented kernel functions:
ExAllocatePoolWithTag
ObReferenceObject
ObDereferenceObject has no return value.
Log a message when ObDereferenceObject/Reference receive unregistered guest kernel objects
gave ObLookupThreadByThreadId its correct error status
hoist object_types initialization out of ObReferenceObjectByHandle
Fix out parameter values on error for a few kernel funcs
add note about msr to KeSetCurrentStackPointers
add X_STATUS_OBJECT_TYPE_MISMATCH check for xeNtSetEvent
add msr_mask field to X_KPCR
Remove dead #if 0'd code in math.h
On amd64, page_size == 4096 constant, on amd64 w/ win32, allocation_granularity == 65536. These values for x86 windows havent changed over the last 20 years so this is probably safe
and gives a modest code size reduction
Enable XE_USE_KUSER_SHARED. This sources host time from KUSER_SHARED instead of from QueryPerformanceCounter, which is far faster, but only has a granularity of 100 nanoseconds.
In some games seemingly random crashes were happening that were hard to trace because
the faulting thread was actually not the one that was misbehaving, another threads stack was underflowing into the faulting thread.
Added a bunch of code to synchronize the guest stack and host stack so that if a guest longjmps the host's stack will be adjusted.
Changes were also made to allow the guest to call into a piece of an existing x64 function.
This synchronization might have a slight performance impact on lower end cpus, to disable it set enable_host_guest_stack_synchronization to false.
It is possible it may have introduced regressions, but i dont know of any yet
So far, i know the synchronization change fixes the "hub crash" in super sonic and allows the game "london 2012" to go ingame.
Removed emit_useless_fpscr_updates, not emitting these updates breaks the raiden game
MapGuestAddressToMachineCode now returns nullptr if no address was found, instead of the start of the function
add Processor::LookupModule
Add Backend::DeinitializeBackendContext
Use WriteRegisterRangeFromRing_WithKnownBound<0, 0xFFFF> in WriteRegisterRangeFromRing for inlining (previously regressed on performance of ExecutePacketType0)
add notes about flags that trap in XamInputGetCapabilities
0 == 3 in XamInputGetCapabilities
Name arg 2 of XamInputSetState
PrefetchW in critical section kernel funcs if available & doing cmpxchg
Add terminated field to X_KTHREAD, set it on termination
Expanded the logic of NtResumeThread/NtSuspendThread to include checking the type of the handle (in release, LookupObject doesnt seem to do anything with the type)
and returning X_STATUS_OBJECT_TYPE_MISMATCH if invalid. Do termination check in NtSuspendThread.
Add basic host exception messagebox, need to flesh it out more (maybe use the new stack tracking stuff if on guest thrd?)
Add rdrand patching hack, mostly affects users with nvidia cards who have many threads on zen
Use page_size_shift in more places
Once again disable precompilation! Raiden is mostly weird ppc asm which probably breaks the precompilation. The code is still useful for running the compiler over the whole of an xex in debug to test for issues
"Fix" debug console, we were checking the cvar before any cvars were loaded, and the condition it checks in AttachConsole is somehow always false
Remove dead #if 0'd code in math.h
On amd64, page_size == 4096 constant, on amd64 w/ win32, allocation_granularity == 65536. These values for x86 windows havent changed over the last 20 years so this is probably safe
and gives a modest code size reduction
Enable XE_USE_KUSER_SHARED. This sources host time from KUSER_SHARED instead of from QueryPerformanceCounter, which is far faster, but only has a granularity of 100 nanoseconds.
In some games seemingly random crashes were happening that were hard to trace because
the faulting thread was actually not the one that was misbehaving, another threads stack was underflowing into the faulting thread.
Added a bunch of code to synchronize the guest stack and host stack so that if a guest longjmps the host's stack will be adjusted.
Changes were also made to allow the guest to call into a piece of an existing x64 function.
This synchronization might have a slight performance impact on lower end cpus, to disable it set enable_host_guest_stack_synchronization to false.
It is possible it may have introduced regressions, but i dont know of any yet
So far, i know the synchronization change fixes the "hub crash" in super sonic and allows the game "london 2012" to go ingame.
Removed emit_useless_fpscr_updates, not emitting these updates breaks the raiden game
MapGuestAddressToMachineCode now returns nullptr if no address was found, instead of the start of the function
add Processor::LookupModule
Add Backend::DeinitializeBackendContext
Use WriteRegisterRangeFromRing_WithKnownBound<0, 0xFFFF> in WriteRegisterRangeFromRing for inlining (previously regressed on performance of ExecutePacketType0)
add notes about flags that trap in XamInputGetCapabilities
0 == 3 in XamInputGetCapabilities
Name arg 2 of XamInputSetState
PrefetchW in critical section kernel funcs if available & doing cmpxchg
Add terminated field to X_KTHREAD, set it on termination
Expanded the logic of NtResumeThread/NtSuspendThread to include checking the type of the handle (in release, LookupObject doesnt seem to do anything with the type)
and returning X_STATUS_OBJECT_TYPE_MISMATCH if invalid. Do termination check in NtSuspendThread.
Add basic host exception messagebox, need to flesh it out more (maybe use the new stack tracking stuff if on guest thrd?)
Add rdrand patching hack, mostly affects users with nvidia cards who have many threads on zen
Use page_size_shift in more places
Once again disable precompilation! Raiden is mostly weird ppc asm which probably breaks the precompilation. The code is still useful for running the compiler over the whole of an xex in debug to test for issues
add msr field on context
write to msr for mtmsr/mfmsr, do not have correct default value for msr yet, nor has mtmsrd been reimplemented
do not evaluate assert expressions in release at all, while still avoiding unused variable warnings
Adds a new X_KTHREAD::apc_disable_count field at 0xB0 into X_KTHREAD based on where 360 kernel seems to store it, and made CriticalRegion funcs act on that, instead of locking things between all threads, and changes DeliverAPCs to check that field before running the APCs.
XThread::LockApc/UnlockApc were also updated too as those previously called into EnterCrit/LeaveCrit to work, but AFAIK the code that uses LockApc/UnlockApc does have an actual need for locking between threads, so changed them to work on XThread::global_critical_region_ directly instead.
C++17ification!
- Filesystem interaction now uses std::filesystem::path.
- Usage of const char*, std::string have been changed to
std::string_view where appropriate.
- Usage of printf-style functions changed to use fmt.
