Adds `walk_guest_back_chain` (PPC EABI back-chain walker) and a
`record_create_with_stack` audit hook gated on `--trace-handles-focus`.
NtCreateEvent / NtCreateSemaphore / NtCreateTimer / XamTaskSchedule now
route through the new helper so focused handles capture up to 6 stack
frames at allocation time. Diagnostic-only, read-only memory access:
unfocused handles pay one HashSet lookup, focused ones pay six
back-chain dereferences. Lockstep determinism preserved.
End-to-end finding: handles 0x1004 (8-instance pool via static ctor at
0x8280F810), 0x100c (singleton built inside main()), 0x15e0 (singleton
in distinct cluster) are silph-framework dispatcher objects whose
producer code is unreached at -n 500M. The producer hunt now has class
ownership; vtable/RTTI readout is the next step.
Tests: 576 → 581 green. `--stable-digest -n 100M` instructions=100000002
unchanged. Master HEAD prior: 9d45efe.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Replaces the no-op stub at xam.rs:204 with a canary-faithful
implementation mirroring xenia-canary/src/xenia/kernel/xam/xam_task.cc:43-80.
Allocates a ThreadImage, allocates a KernelObject::Thread handle, and
routes through Scheduler::spawn with entry=callback and
start_context=message_ptr (canary's third positional XThread ctor arg).
Stack size = max(0x4000, page-aligned 0x10_0000).
Producer-hypothesis outcome (500M --trace-handles-focus run): the call
site at 0x824a9a10 is never reached during this boot horizon, so
XamTaskSchedule cannot be the missing producer for the 3 parked
Event/Manual handles (0x1004, 0x100c, 0x15e4). The fix still lands —
the stub was a real correctness bug that would manifest the moment
the boot advances past the current deadlock. Next candidate per
audit-findings.md: XAudioRegisterRenderDriverClient.
- Workspace tests: 561 → 562 green (new test
xam::tests::xam_task_schedule_spawns_real_thread).
- --stable-digest -n 100M: instructions=100000002 unchanged from
baseline; lockstep determinism preserved.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Major HLE buildout in exports.rs: KeInitializeSemaphore now seeds
count/limit, XexGet{Module,Procedure}Address use distinct
HMODULE_XBOXKRNL/HMODULE_XAM pseudo-handles with a reverse
(ModuleId,ordinal)→thunk_addr map, plus sweeping additions across
sync primitives, file I/O, semaphores, events, threads, and
allocator paths needed to advance Sylpheed past VdSwap=2.
New modules:
- thread.rs — ThreadRef + per-thread suspension/wake plumbing
- interrupts.rs — IRQ delivery, pending-IRQ slots, IPI helpers
- path.rs — guest path normalization (D:\\, game:\\, etc.)
- audit.rs — --trace-handles harness backing the handle audit
- ui_bridge.rs — kernel-side endpoint of the xenia-ui bridge
(input snapshots, framebuffer publish handles)
state.rs grows to own the HW-slot scheduler state, the new audit /
UI bridge handles, and the per-handle reverse maps. xam.rs and
objects.rs follow suit for the HLE additions.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Rust reimplementation of the xenia Xbox 360 emulator targeting reverse-
engineering and preservation, initially scoped to Project Sylpheed.
Includes:
- XEX2 loader (LZX decompression, AES decryption, PE parsing)
- XISO / XGD2 disc image VFS
- PPC interpreter with 200+ opcodes and VMX128 decoding
- Static analyzer: functions, cross-references, labels, asm + SQLite output
- HLE kernel covering the xboxkrnl/xam subset used by Sylpheed init
- Debugger with in-memory and SQLite-backed execution tracing
- `xenia-rs` CLI with extract/dis/exec commands that produce cumulative,
superset SQLite databases and opt-in instruction/import/branch traces
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
