DECISIVE: installed the pre-built UPSTREAM virtual-display-rs (Rust wdf-umdf IddCx)
driver on the SAME box -> Status=OK. So a Rust IddCx driver inits an adapter here,
self-signed, right now. My wdk-sys driver still fails ONLY at IddCxAdapterInitAsync
(0xc000000d) despite matching virtual-display-rs on EVERY inspectable dimension:
- same iddcx 1.10 headers+stub
- IDDCX_ADAPTER_CAPS + IDD_CX_CLIENT_CONFIG byte-perfect (offsets match C header)
- runtime pointers all valid/non-null (names .rdata, version stack, dev handle)
- identical IddFunctions[idx]+IddDriverGlobals dispatch; indices 0/1/2
- matched the minimal link (tested vendored wdk-build WITHOUT OneCoreUAP/
NODEFAULTLIB/OPT/INTEGRITYCHECK -> still fails; export pollution ruled out)
- device context, no device interface (control via EvtIddCxDeviceIoControl), init order
The IddCx ClassExtension ETW provider emits no decodable reason (WPP/kernel-debugger
only). The remaining difference is the wdk-sys IddCx binding itself, invisible to
inspection. This commit keeps the upstream-matching structure (device context, no
interface) + the on-glass instrumentation; vendored wdk-build reverted to pristine.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Major on-glass progress on the RTX box. The all-Rust wdk-sys IddCx driver now LOADS
under Secure Boot and runs the ENTIRE init chain: DriverEntry -> WdfDriverCreate ->
driver_add -> IddCxDeviceInitConfig(0x0) -> WdfDeviceCreate -> CreateDeviceInterface
-> IddCxDeviceInitialize -> D0Entry -> init_adapter. Findings:
- Signing was a RED HERRING (the driver loads); std works in WUDFHost (DualSense uses
it too).
- THE unblock: link the iddcx **1.10** IddCxStub (build.rs now picks the highest
version-aware), not 1.0 — the 1.0 stub lacks the version-table symbols AND its
dispatch table mismatched the 1.10 framework, which made IddCxDeviceInitConfig
return INVALID_PARAMETER. With 1.10 the whole chain runs.
- Added a file/OutputDebugString logger (log.rs, matches the DualSense driver) — the
driver was silent; this is how the chain was traced.
- size.rs: framework_struct_size() reads the frameworks authoritative struct sizes
from IddStructures[] (the config keeps size_of=208, validated working).
- adapter.rs: version ptrs + ObjectAttributes(InheritFromParent) + FP16 + framework
caps/diag/version sizes — matches the oracle.
KNOWN WIP: IddCxAdapterInitAsync still returns INVALID_PARAMETER though caps match
the framework size table (88/56/24) + the oracle exactly — likely a subtle wdk-sys
bindgen field-layout detail in IDDCX_ADAPTER_CAPS/IDDCX_ENDPOINT_DIAGNOSTIC_INFO.
CI gate (compile+link) stays green.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
DriverEntry -> driver_add builds the full IDD_CX_CLIENT_CONFIG (14 IddCx callbacks +
PnP EvtDeviceD0Entry, all stubs with correct PFN signatures) sized via the ported
IDD_STRUCTURE_SIZE! (size.rs), runs IddCxDeviceInitConfig -> WdfDeviceCreate ->
WdfDeviceCreateDeviceInterface(the owned pf-vdisplay GUID, not SudoVDA) ->
IddCxDeviceInitialize. callbacks.rs has all 14 + device_d0_entry; query_target_info
implements HIGH_COLOR_SPACE. edid.rs salvaged verbatim from the oracle. proto gains
interface_guid_fields() (u128 -> Windows GUID fields). Links IddCxStub (the CI gate);
adapter/monitor/swapchain/IDD-push fill the stubs in STEP 3-6.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
M1 step 2 begins. Add the wdk-iddcx (lib, re-exports wdk_sys::iddcx) + pf-vdisplay
(cdylib) workspace members. pf-vdisplay STEP 0 = DriverEntry + WdfDeviceCreate
skeleton + a #[used] _std_link_gate forcing std::thread + OwnedHandle to link, so
the build proves the std surface resolves under the wdk-build UMDF link settings
(kernel32 is /NODEFAULTLIB - std must come via OneCoreUAP). If std fails to link
here, the SwapChainProcessor worker-thread design needs a CreateThread shim before
any callback work (port-plan critique gap #9).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
enricobuehler