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AnyPS5/docs/dev/debt/libSceHmd2.md
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# libSceHmd2 technical debt
### Silent stubs
- [libSceHmd2](../../../core/libs/prx/libSceHmd2/Export.cpp) has no PS VR2 runtime: Initialize returns unsupported-feature, so normal calls never reach initialized device behavior. Reprojection and gaze operations retain their throwing bodies. Four size/alignment queries return measured constants; QueryBufferSizeAlign still throws. Device setup, headset tracking and rendering are not implemented.
### Unknown function info
- [sceHmd2Open](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - the handle is the value the console's driver returned to the first open; titles built with an SDK before 7.00 may open for any user, and the firmware's `sceMbusAddHandleByUserId` result for a user other than the initial one is unknown, so that case throws. 0x8a720006 for a second open is named `AlreadyOpened` from its use
- [sceHmd2SetVibration](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - the second parameter is checked against 25 only while a headset is connected; its name and unit are unknown. The field of view member names are assumed: of the firmware's default tangents the first is the widest and the last two are equal
- [libSceHmd2 legacy exports](../../../core/libs/prx/libSceHmd2/Export.cpp) - SeeThroughDraw, SeeThroughIC, VideoOutEq, WaitShader, SeeThroughCallbackGetPoseDataFunc, ReprojectionClear, ReprojectionSet and RpeorjectionSetParam have no matching symbols or callers in the supplied system modules. Their signatures remain unresolved. ClearUserEventEnd/Start, GazeStart/StopUserCalibration and GazeObjectSelectionTerminate are confirmed to take no arguments; their behavior after initialization remains unimplemented.
- [sceHmd2InternalSetPortStatus](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - unknown signature
- [sceHmd2InternalLedDetectorStartBySlot](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - unknown signature
- [sceHmd2InternalImageStartBySlot](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - unknown signature
- [sceHmd2InternalSetPortConnection](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - unknown signature
- [sceHmd2InternalSetCameraSeeThroughMode](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - unknown signature
- [sceHmd2InternalSetFakeLensSeparationDistance](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - unknown signature
- [sceHmd2InternalDfuSend](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - unknown signature
- [sceHmd2InternalLedDetectorOpenBySlot](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - unknown signature
- [sceHmd2InternalImageOpenBySlot](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - unknown signature
- [sceHmd2InternalLedDetectorStopBySlot](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - unknown signature
- [sceHmd2InternalSetDeviceConnection](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - unknown signature
- [sceHmd2InternalLedDetectorCloseBySlot](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - unknown signature
- [sceHmd2InternalSetSidetone](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - unknown signature
- [sceHmd2InternalGetDeviceId](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - unknown signature
- [sceHmd2InternalSetBrightness](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - unknown signature
- [sceHmd2InternalImageStopBySlot](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - unknown signature
- [sceHmd2InternalSetVibrationMode](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - unknown signature
- [sceHmd2InternalGetVr2dData](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - unknown signature
- [sceHmd2InternalImageCloseBySlot](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - unknown signature
### Functional
- [sceHmd2Initialize](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - the firmware also fails with 0x8a72001f when `sceKernelGetAppInfo` fails and with 0x8a72000a for some applications, depending on app info fields at 0x2c, 0x4b and 0x4d whose meaning is unknown, and then calls `sceMbusInit`; none of this is modelled
- [Reprojection size/alignment queries](../../../core/libs/prx/libSceHmd2/Export.cpp) - all five exports consume no arguments and return two uint64 values in RAX:RDX. Four host queries return values measured without a headset; native display sizes are calculated through the graphics layout service and see-through size follows internal configuration. QueryBufferSizeAlign changes calculation with runtime state; its native pair return type is restored, while its protected body remains unchanged and throws.
- [Hmd2BeforeInitializeZero](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console answers 0 to these 45 exports both with every argument null and with every argument pointing at a zeroed 16 KiB buffer, writing nothing: `vDgpdS2N9Rw` (sceHmd2InternalRegisterVibrationCallback), `Ri35gKTZpvE` (sceHmd2InternalUnregisterVibrationCallback), `9oyW8puiKeI`, `1HZNE6jhBnQ` (sceHmd2InternalPowerEventInitialize), `cdwAKBZLXjs`, `Yub1MF58jfY`, `JYXAuQFnPyw` (sceHmd2InternalDfuOpen), `VuPKqCu3wzw` (sceHmd2InternalDfuClose), `GSThagVyW5U` (sceHmd2InternalCrashReportOpen), `J4qE5N937MY` (sceHmd2InternalCrashReportClose), `9KnNj-dyASg`, `Qta2bkstbFk`, `5ZcObnDRBXE`, `AvPNn0qx4WQ`, `jp0apqNGgi8` (sceHmd2SetIpdOffset), `-kZT7X7OMg0` (sceHmd2InternalRelocalizerOpen), `1ewLtng-SVk` (sceHmd2InternalRelocalizerClose), `B0b8DeIUGes` (sceHmd2InternalTrackingOpen), `HclLg4Oj5yw` (sceHmd2InternalTrackingClose), `VbEvrQXsZyY` (sceHmd2InternalLedDetectorOpen), `bB6MKZi5UCQ` (sceHmd2InternalLedDetectorClose), `OXQ1EDf02XU` (sceHmd2InternalImageOpen), `IAxfMTvFm0M` (sceHmd2InternalImageClose), `qTJtAtaLeno` (sceHmd2InternalGenDataOpen), `j7Q16UX6l34` (sceHmd2InternalGenDataClose), `pmmNM06rLqU`, `zdQfyDK9Ods` (sceHmd2InternalSlamTraceOpen), `aPRwp9GnljM` (sceHmd2InternalSlamTraceClose), `MjY1gBSaed0` (sceHmd2InternalGazeOpen), `evAMjJYHqW4` (sceHmd2InternalGazeClose), `r93FLEZ3BBk` (sceHmd2InternalGazeStart), `IdYURdEdNFo` (sceHmd2InternalGazeStop), `CVcL2Cu2AEI` (sceHmd2GazeActivateGazeTracking), `NmKIfVxr2s0`, `KeDLkkp62Gg`, `+aadu6-ra+A`, `FgnTiwwGSzk`, `PWAUwOTHbbo` (sceHmd2InternalCreateSharedMemory), `WzaEApHnsP8` (sceHmd2InternalIsGameVr2d), `dXzQI8QVY7Y` (sceHmd2InternalIsMiniAppVr2d), `cCvFKGqRh1k` (sceHmd2InternalIsCommonDlgVr2d), `uj4-2VEAFPU` (sceHmd2InternalIsCommonDlgMiniAppVr2d), `sIaGStI-iLM` (sceHmd2InternalMapSharedMemory), `JzwpZOemDO8`, `IsC4R4bZFVU`. Measured from a payload process on firmware 13.60, so a game process before initialization is assumed to answer the same; the arguments and the behaviour after initialization are not measured, and the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2BeforeInitializeNotInitialized](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console answers `0x8a720002` to these 9 exports both with every argument null and with every argument pointing at a zeroed 16 KiB buffer, writing nothing: `sXaPEPY-fLA` (sceHmd2InternalOpen), `3F5inHhKzXg` (sceHmd2InternalGetDeviceInformation), `sJAiB-6p55U`, `E8hDydLjsSs`, `xEQkSb2WJ7Y`, `aaP4dnR4q-0`, `lEU0TeUoGwI`, `cFVyjHBpUUU`, `zROtb46jTj4`. Measured from a payload process on firmware 13.60, so a game process before initialization is assumed to answer the same; the arguments and the behaviour after initialization are not measured, and the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2BeforeInitializeError0004](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console answers `0x8a720004` to these 15 exports both with every argument null and with every argument pointing at a zeroed 16 KiB buffer, writing nothing: `kAMsjYHBbNQ` (sceHmd2InternalSetVolume), `5m73zmLpsQ0` (sceHmd2InternalResetViewPosition), `EPeH4xuQ2XQ` (sceHmd2InternalGetStatus), `TJ8lyRsjFY4` (sceHmd2InternalClearTrackerFts), `-XQVcLnyX68` (sceHmd2InternalSetSlamCommand), `giQwQoHhYYA` (sceHmd2InternalDfuStart), `zNc9IkgawMI`, `-tnG5UJPvAc` (sceHmd2GazeStartUserCalibration), `FPhFmG+jXuQ` (sceHmd2GazeStopUserCalibration), `CKlkvNngofQ`, `yL1CZaciFWE` (sceHmd2GazeSetUserCalibrationPoint), `qlzgyG3s0RY`, `kTIDrDLzMv0`, `9Gee0ef8a+U`, `ecZVjQdwmBI` (sceHmd2GazeSetEnabledEye). Measured from a payload process on firmware 13.60, so a game process before initialization is assumed to answer the same; the arguments and the behaviour after initialization are not measured, and the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2BeforeInitializeParameterNull](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console answers `0x8a720008` to these 16 exports both with every argument null and with every argument pointing at a zeroed 16 KiB buffer, writing nothing: `MNtiJTDOPAU`, `RRy9WmqZfgU` (sceHmd2InternalDecryptData), `uobR4m9lgwc` (sceHmd2InternalGetMirroringMode), `-XPk5KWBYdo` (sceHmd2InternalRelocalizerSetResultData), `J44idh9izZM`, `Ps0wAvYaa1E`, `kLnMR8oQ1MY`, `kMz4rbBxvjo`, `DIU1sFRRaiE` (sceHmd2GazeGetCalibrationData), `ZQvU4vDzZGQ` (sceHmd2GazeSetUserCalibrationData), `TJpyGGP9YEY`, `Dih+Odk+RC0`, `oaqdSJw+HVY`, `m35gtHuanXU`, `CTM7QPLJF9Q` (sceHmd2InternalGetFlipInfo), `+rExHeC9lP0` (sceHmd2GazeObjectSelectionInitialize). Measured from a payload process on firmware 13.60, so a game process before initialization is assumed to answer the same; the arguments and the behaviour after initialization are not measured, and the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2BeforeInitializeParameterInvalid](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console answers `0x8a720009` to these 9 exports both with every argument null and with every argument pointing at a zeroed 16 KiB buffer, writing nothing: `bBh5bCp9coo` (sceHmd2InternalSetPositionResetIcon), `G3PNDE2VjfY` (sceHmd2InternalSetPowerOff), `nScCT0OPU0o`, `6Q0Ng7OTN9o`, `-fJKh4SnFR0` (sceHmd2InternalSetBudgetMode), `jUA2s-l0npY` (sceHmd2InternalSetForceIcon), `+9XhyAIJVj4`, `eBGK-o6E4RQ` (sceHmd2InternalBindDeviceWithUserId), `MTuFeL9184E`. Measured from a payload process on firmware 13.60, so a game process before initialization is assumed to answer the same; the arguments and the behaviour after initialization are not measured, and the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2BeforeInitializeReprojectionNotInitialized](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console answers `0x8a72000b` to these 10 exports both with every argument null and with every argument pointing at a zeroed 16 KiB buffer, writing nothing: `d3SEIYTP6wc`, `EVECbTvBezo`, `ciusPdJKjSU`, `DIwqTkcZiJo` (sceHmd2ReprojectionSetUserEventStart), `64ERZWVFBTE` (sceHmd2ReprojectionSetUserEventEnd), `z0+0gXUJWs8` (sceHmd2ReprojectionClearUserEventStart), `rjAd4nCY4DM` (sceHmd2ReprojectionClearUserEventEnd), `Acyg4vTdGm0` (sceHmd2ReprojectionGetCurrentOutput), `aGOWaEeg04I`, `9up+EPhw1No`. Measured from a payload process on firmware 13.60, so a game process before initialization is assumed to answer the same; the arguments and the behaviour after initialization are not measured, and the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2BeforeInitializeError002C](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console answers `0x8a72002c` to these 1 exports both with every argument null and with every argument pointing at a zeroed 16 KiB buffer, writing nothing: `V1kLQmP-17U` (sceHmd2GazeObjectSelectionTerminate). Measured from a payload process on firmware 13.60, so a game process before initialization is assumed to answer the same; the arguments and the behaviour after initialization are not measured, and the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2BeforeInitializeError1002](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console answers `0x8a721002` to these 5 exports both with every argument null and with every argument pointing at a zeroed 16 KiB buffer, writing nothing: `2LVD1EC5SYE`, `Bf87AL6zWxU`, `XKt7w1MODFY`, `Y5s22M-qUDA`, `JJKY-BtQJLg`. Measured from a payload process on firmware 13.60, so a game process before initialization is assumed to answer the same; the arguments and the behaviour after initialization are not measured, and the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2BeforeInitializeError1003](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console answers `0x8a721003` to these 1 exports both with every argument null and with every argument pointing at a zeroed 16 KiB buffer, writing nothing: `9kj9vw8UShQ`. Measured from a payload process on firmware 13.60, so a game process before initialization is assumed to answer the same; the arguments and the behaviour after initialization are not measured, and the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2BeforeInitializeMinusOne](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console answers -1 to these 12 exports both with every argument null and with every argument pointing at a zeroed 16 KiB buffer, writing nothing: `EAkv8Mqt33E` (sceHmd2InternalRelocalizerStart), `Rv7bkmKvmz0` (sceHmd2InternalRelocalizerStop), `1oPZizn0SNA` (sceHmd2InternalTrackingStart), `TwCpE-nNrlo` (sceHmd2InternalTrackingStop), `jkqAeQfdtxw` (sceHmd2InternalLedDetectorStart), `+l0RQph81Z8` (sceHmd2InternalLedDetectorStop), `qsmAtGw1Ncc` (sceHmd2InternalImageStart), `uKhwYoMsIsA` (sceHmd2InternalImageStop), `WNdaigr94dI` (sceHmd2InternalGenDataStart), `P6S5ZVWf-H0` (sceHmd2InternalGenDataStop), `sun6NWE1sdg` (sceHmd2InternalSlamTraceStart), `--TFsJYXo04` (sceHmd2InternalSlamTraceStop). Measured from a payload process on firmware 13.60, so a game process before initialization is assumed to answer the same; the arguments and the behaviour after initialization are not measured, and the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2BeforeInitializeValue0400](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console answers `0x400` to these 1 exports both with every argument null and with every argument pointing at a zeroed 16 KiB buffer, writing nothing: `BWqcwjCozzI`. Measured from a payload process on firmware 13.60, so a game process before initialization is assumed to answer the same; the arguments and the behaviour after initialization are not measured, and the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2BeforeInitializeValue20000](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console answers `0x20000` to these 1 exports both with every argument null and with every argument pointing at a zeroed 16 KiB buffer, writing nothing: `PRz7TdBGUI0`. Measured from a payload process on firmware 13.60, so a game process before initialization is assumed to answer the same; the arguments and the behaviour after initialization are not measured, and the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2CheckFirstThenError0004](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console answers `0x8a720008` when argument 0 is null and `0x8a720004` when every argument points at a zeroed 16 KiB buffer, writing nothing, for these 20 exports: `9WeZr4kYfzk` (sceHmd2InternalGetFwVersion), `N+5h1hCOFAg` (sceHmd2InternalGetRequiredPUPVersion), `w2vEs2y5ZmE` (sceHmd2InternalGetOpticalParam), `L5gat1pe0y0` (sceHmd2InternalSetCameraSeeThroughParam), `4GnLHR9NJ1w`, `AHk7nGSzef0` (sceHmd2InternalGetTrackerFtsData), `ncjX9d3mc0M`, `l63QYAUuogc` (sceHmd2InternalGetSlamCommand), `mrcBySCdXSo` (sceHmd2InternalDfuGetStatus), `ieBra+td8sU` (sceHmd2InternalDfuGetUpdateStatus), `s+rzBnewgGs` (sceHmd2InternalDfuCheckAfterPvt), `Nfcm0GBdzZI` (sceHmd2InternalRelocalizerGetVersion), `Tc9rasWfrm4` (sceHmd2InternalSetHomeCalibration), `ckTbKTX4KZg`, `D7576PUbUjk` (sceHmd2InternalGazeReadStatus), `tTJ04SrBT8U`, `sDP7hZ-P6OI` (sceHmd2GazeGetDeviceStatus), `J+eVNbN9ndY` (sceHmd2GazeGetUserCalibrationStatus), `kozvHBNyxf0`, `638Tmg5y6U4`. Each argument was nulled on its own with the others present (probe `hmd2n`, payload process, firmware 13.60); what the present arguments mean, and the behaviour after initialization, are not measured, so the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2CheckFirstThenZero](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console answers `0x8a720008` when argument 0 is null and 0 when every argument points at a zeroed 16 KiB buffer, writing nothing, for these 8 exports: `8ETtFtp5zqY` (sceHmd2InternalGetVrMode), `CWPkBm3EXQA`, `R62liQQIAaA` (sceHmd2InternalGetFakeLensSeparationDistance), `-bcWLHsdzo0`, `JngJzgNbu8U` (sceHmd2SetFieldOfView), `xNBSz8xrGdk`, `yUVPfN-jRIU`, `BKPR3RZ5aO4`. Each argument was nulled on its own with the others present (probe `hmd2n`, payload process, firmware 13.60); what the present arguments mean, and the behaviour after initialization, are not measured, so the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2CheckFirstThenError1002](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console answers `0x8a720008` when argument 0 is null and `0x8a721002` when every argument points at a zeroed 16 KiB buffer, writing nothing, for these 8 exports: `IG4y+drWAWw` (sceHmd2InternalRelocalizerReadData), `rhYUml9vppE` (sceHmd2InternalRelocalizerReadDataAsync), `6574xHS+jZk` (sceHmd2InternalRelocalizerReadData2), `mXzaY6xVoxg` (sceHmd2InternalTrackingReadData), `6af-HIZQQn4` (sceHmd2InternalTrackingReadData2), `6qWtdTHQsTk`, `pUm8t8xWhFg`, `A0XKI-WjxK8` (sceHmd2InternalImageReadData). Each argument was nulled on its own with the others present (probe `hmd2n`, payload process, firmware 13.60); what the present arguments mean, and the behaviour after initialization, are not measured, so the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2CheckFirstThenMinusOne](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console answers `0x8a720008` when argument 0 is null and -1 when every argument points at a zeroed 16 KiB buffer, writing nothing, for these 5 exports: `A9s2j8OioPQ`, `YIgtmrL+HLY`, `Ng8zEkGxDNs`, `EtslTnqO1xU` (sceHmd2InternalImageStart2), `hfrnRTryKQQ` (sceHmd2InternalImageSetConfig). Each argument was nulled on its own with the others present (probe `hmd2n`, payload process, firmware 13.60); what the present arguments mean, and the behaviour after initialization, are not measured, so the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2CheckFirstTwoThenParameterInvalid](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console answers `0x8a720008` when argument 0 and argument 1 is null and `0x8a720009` when every argument points at a zeroed 16 KiB buffer, writing nothing, for these 3 exports: `PPX68fNToFM`, `LxPIfjHaY4c` (sceHmd2GazeObjectSelectionQueryMemory), `w8gBTTdg+po` (sceHmd2GazeObjectSelectionGetSelectedObject). Each argument was nulled on its own with the others present (probe `hmd2n`, payload process, firmware 13.60); what the present arguments mean, and the behaviour after initialization, are not measured, so the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2CheckSecondThenError002C](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console answers `0x8a720008` when argument 1 is null and `0x8a72002c` when every argument points at a zeroed 16 KiB buffer, writing nothing, for these 3 exports: `tWJPX2ycRMM`, `5UMB9PJA70o`, `xQs62qCk1EI`. Each argument was nulled on its own with the others present (probe `hmd2n`, payload process, firmware 13.60); what the present arguments mean, and the behaviour after initialization, are not measured, so the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2CheckFirstThenParameterInvalid](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console answers `0x8a720008` when argument 0 is null and `0x8a720009` when every argument points at a zeroed 16 KiB buffer, writing nothing, for these 2 exports: `MMc+bSlqkzk` (sceHmd2InternalSetVirtualDisplaySize), `NpZHgvSYgEA`. Each argument was nulled on its own with the others present (probe `hmd2n`, payload process, firmware 13.60); what the present arguments mean, and the behaviour after initialization, are not measured, so the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2CheckAllSixThenZero](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console answers `0x8a720008` when argument 0 and argument 1 and argument 2 and argument 3 and argument 4 and argument 5 is null and 0 when every argument points at a zeroed 16 KiB buffer, writing nothing, for these 2 exports: `z-serf9vsb0` (sceHmd2InternalPushVr2dData), `IRMUFu+uG5s`. Each argument was nulled on its own with the others present (probe `hmd2n`, payload process, firmware 13.60); what the present arguments mean, and the behaviour after initialization, are not measured, so the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2CheckSecondThenParameterInvalid](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console answers `0x8a720008` when argument 1 is null and `0x8a720009` when every argument points at a zeroed 16 KiB buffer, writing nothing, for these 2 exports: `72U64E+0z6U`, `LCQzi5ILGrY` (sceHmd2GazeGetCalibrationDataMaxSize). Each argument was nulled on its own with the others present (probe `hmd2n`, payload process, firmware 13.60); what the present arguments mean, and the behaviour after initialization, are not measured, so the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2CheckFirstThenError800d0203](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console answers `0x8a720008` when argument 0 is null and `0x800d0203` when every argument points at a zeroed 16 KiB buffer, writing nothing, for these 1 exports: `Im0qL0j9Ubg`. Each argument was nulled on its own with the others present (probe `hmd2n`, payload process, firmware 13.60); what the present arguments mean, and the behaviour after initialization, are not measured, so the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2CheckFirstThenError1003](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console answers `0x8a720008` when argument 0 is null and `0x8a721003` when every argument points at a zeroed 16 KiB buffer, writing nothing, for these 1 exports: `ng6eI8uA0h4` (sceHmd2InternalImageGetMemoryLayout). Each argument was nulled on its own with the others present (probe `hmd2n`, payload process, firmware 13.60); what the present arguments mean, and the behaviour after initialization, are not measured, so the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2CheckFirstThenError1010](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console answers `0x8a720008` when argument 0 is null and `0x8a721010` when every argument points at a zeroed 16 KiB buffer, writing nothing, for these 1 exports: `mPPGgjyJrCI`. Each argument was nulled on its own with the others present (probe `hmd2n`, payload process, firmware 13.60); what the present arguments mean, and the behaviour after initialization, are not measured, so the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2CheckFirstTwoThenError1002](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console answers `0x8a720008` when argument 0 and argument 1 is null and `0x8a721002` when every argument points at a zeroed 16 KiB buffer, writing nothing, for these 1 exports: `ZupCJmV5BDI` (sceHmd2InternalImageGetFrameData). Each argument was nulled on its own with the others present (probe `hmd2n`, payload process, firmware 13.60); what the present arguments mean, and the behaviour after initialization, are not measured, so the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2CheckFirstTwoThenError1003](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console answers `0x8a720008` when argument 0 and argument 1 is null and `0x8a721003` when every argument points at a zeroed 16 KiB buffer, writing nothing, for these 1 exports: `mAQZwOX1IHU` (sceHmd2InternalImageGetAverageLuminance). Each argument was nulled on its own with the others present (probe `hmd2n`, payload process, firmware 13.60); what the present arguments mean, and the behaviour after initialization, are not measured, so the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2CheckFirstAndThirdThenZero](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console answers `0x8a720008` when argument 0 and argument 2 is null and 0 when every argument points at a zeroed 16 KiB buffer, writing nothing, for these 1 exports: `oacDkQkinLo`. Each argument was nulled on its own with the others present (probe `hmd2n`, payload process, firmware 13.60); what the present arguments mean, and the behaviour after initialization, are not measured, so the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2CheckFirstAndThirdThenError1003](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console answers `0x8a720008` when argument 0 and argument 2 is null and `0x8a721003` when every argument points at a zeroed 16 KiB buffer, writing nothing, for these 1 exports: `zn7PHGzzEyI`. Each argument was nulled on its own with the others present (probe `hmd2n`, payload process, firmware 13.60); what the present arguments mean, and the behaviour after initialization, are not measured, so the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2CheckSecondThenInvalidHandle](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console answers `0x8a720008` when argument 1 is null and `0x8a720003` when every argument points at a zeroed 16 KiB buffer, writing nothing, for these 1 exports: `wEHILc7TP04` (sceHmd2GazeInsertRawDataWithHandle). Each argument was nulled on its own with the others present (probe `hmd2n`, payload process, firmware 13.60); what the present arguments mean, and the behaviour after initialization, are not measured, so the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2CheckSecondThenError1002](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console answers `0x8a720008` when argument 1 is null and `0x8a721002` when every argument points at a zeroed 16 KiB buffer, writing nothing, for these 1 exports: `W-ZIlUXcrNA`. Each argument was nulled on its own with the others present (probe `hmd2n`, payload process, firmware 13.60); what the present arguments mean, and the behaviour after initialization, are not measured, so the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2WriteStateTwo](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console writes the five bytes `02 00 00 00 00` at the start of its first argument and returns 0; a null first argument returns `0x8a720008`: `omimgG5itSs`. Measured from a payload process on firmware 13.60 (probes `hmd2n` and `hmd2x`); the meaning of the arguments and the behaviour after initialization are not measured, and the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2WriteSize0x2000Align0x100](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console writes the 64-bit values `0x2000` through its first argument and `0x100` through its second and returns 0; a null first or second argument returns `0x8a720008`: `6PeHcAaKYg8`. Measured from a payload process on firmware 13.60 (probes `hmd2n` and `hmd2x`); the meaning of the arguments and the behaviour after initialization are not measured, and the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2WriteFourConstants](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console writes the 16 bytes `e1 f0 74 3c d8 f0 74 3c 1f f1 74 3c d8 f0 74 3c` (four floats near 0.01495) at the start of its first argument and returns 0; a null first argument returns `0x8a720008`: `yur+xPdWPAg`. Measured from a payload process on firmware 13.60 (probes `hmd2n` and `hmd2x`); the meaning of the arguments and the behaviour after initialization are not measured, and the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2WriteSixHalvesThenInvalidHandle](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console writes the 24 bytes `00 00 00 00 00 00 00 3f 00 00 00 3f 00 00 00 00 00 00 00 3f 00 00 00 3f` (floats 0, 0.5, 0.5, 0, 0.5, 0.5) at the start of its second argument and returns `0x8a720003` for every first argument tried (0, a pointer); a null second argument returns `0x8a720008`: `RnieDDp5ge4`, `jM3NEJA11yw`. Measured from a payload process on firmware 13.60 (probes `hmd2n` and `hmd2x`); the meaning of the arguments and the behaviour after initialization are not measured, and the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2WriteTwelveHalvesThenInvalidHandle](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console writes the 48 bytes `00 00 00 00 00 00 00 3f 00 00 00 3f 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 3f 00 00 00 3f 00 00 00 00 00 00 00 00 00 00 00 00` (floats 0, 0.5, 0.5, 0, 0, 0, 0, 0.5, 0.5, 0, 0, 0) at the start of its second argument and returns `0x8a720003` for every first argument tried; a null second argument returns `0x8a720008`: `b0H-n-tUk0U`. Measured from a payload process on firmware 13.60 (probes `hmd2n` and `hmd2x`); the meaning of the arguments and the behaviour after initialization are not measured, and the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2SlotUpTo3CheckSecondThirdThenZero](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console returns 0 for a first argument of 0 to 3 and `0x8a720009` for 4, 5, 8, 16, 255 and -1; a null second or third argument returns `0x8a720008` even with an invalid first argument. Its fourth to sixth arguments answered `0x8a720009` when null with an invalid first argument, which does not separate them from the first-argument check, so they are not looked at: `MXhloJ6Iw3w`. Measured from a payload process on firmware 13.60 (probes `hmd2n` and `hmd2x`); the meaning of the arguments and the behaviour after initialization are not measured, and the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2SlotUpTo1ThenError1002](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console returns `0x8a721002` for a first argument of 0 or 1 and `0x8a720009` for 2 to 5, 8, 16, 255 and -1; its other arguments were only nulled with an invalid first argument, which answered `0x8a720009` either way, so they are not looked at: `19wrIIiqFgM`. Measured from a payload process on firmware 13.60 (probes `hmd2n` and `hmd2x`); the meaning of the arguments and the behaviour after initialization are not measured, and the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2SlotUpTo1CheckSecondThenError1002](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console returns `0x8a721002` for a first argument of 0 or 1 and `0x8a720009` for 2 to 5, 8, 16, 255 and -1; a null second argument returns `0x8a720008` even with an invalid first argument: `Z389vAm47Ys`. Measured from a payload process on firmware 13.60 (probes `hmd2n` and `hmd2x`); the meaning of the arguments and the behaviour after initialization are not measured, and the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2SlotUpTo1ThenMinusOne](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console returns -1 for a first argument of 0 or 1 and `0x8a720009` for 2 to 5, 8, 16, 255 and -1; the other arguments are not looked at, for the reason given above: `cDcrvEG8j8k`, `tuqJO6O6cb4` (sceHmd2InternalLedDetectorSetIrCameraConfigBySlot), `fd4fu1cziaI` (sceHmd2InternalLedDetectorSetPriorityConfigBySlot). Measured from a payload process on firmware 13.60 (probes `hmd2n` and `hmd2x`); the meaning of the arguments and the behaviour after initialization are not measured, and the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2SlotUpTo2ThenMinusOne](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console returns -1 for a first argument of 0 to 2 and `0x8a720009` for 3 to 5, 8, 16, 255 and -1; the other arguments are not looked at: `UxMg7iL4nRs`, `K1GELwlaaGc` (sceHmd2InternalImageSetConfigBySlot). Measured from a payload process on firmware 13.60 (probes `hmd2n` and `hmd2x`); the meaning of the arguments and the behaviour after initialization are not measured, and the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2SlotUpTo2ThenError1002](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console returns `0x8a721002` for a first argument of 0 to 2 and `0x8a720009` for 3 to 5, 8, 16, 255 and -1; the other arguments are not looked at: `RFn39VCHjGY`. Measured from a payload process on firmware 13.60 (probes `hmd2n` and `hmd2x`); the meaning of the arguments and the behaviour after initialization are not measured, and the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2SlotUpTo2ThenError1003](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console returns `0x8a721003` for a first argument of 0 to 2 and `0x8a720009` for 3 to 5, 8, 16, 255 and -1; the other arguments are not looked at: `FRoSjceDv10`. Measured from a payload process on firmware 13.60 (probes `hmd2n` and `hmd2x`); the meaning of the arguments and the behaviour after initialization are not measured, and the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2SlotUpTo2CheckSecondThenError002C](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console returns `0x8a72002c` for a first argument of 0 to 2 and `0x8a720009` for 3 to 5, 8, 16, 255 and -1; a null second argument returns `0x8a720008` even with an invalid first argument: `wQ44gBwBw44`. Measured from a payload process on firmware 13.60 (probes `hmd2n` and `hmd2x`); the meaning of the arguments and the behaviour after initialization are not measured, and the handler throws once `sceHmd2Initialize` has succeeded
- [Hmd2IndexZeroCheckSecondThenZero](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - before `sceHmd2Initialize` the console returns 0 for a first argument of 0 and `0x8a72100f` for 1 to 5, 8, 16, 255 and -1; a null second argument returns `0x8a720008` even with a nonzero first argument. Its third to sixth arguments answered `0x8a72100f` when null with a nonzero first argument, which does not separate them from the first-argument check, so they are not looked at: `wiv8+7ogrq0`. Measured from a payload process on firmware 13.60 (probes `hmd2n` and `hmd2x`); the meaning of the arguments and the behaviour after initialization are not measured, and the handler throws once `sceHmd2Initialize` has succeeded
- [FBUEhH9tQ1A](../../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - left unimplemented: before initialization it writes the 32-bit value 9 through its second argument and returns 0 when its first argument points at zeroed memory, but returns `0x8a720001` without writing when that memory holds 0xAA bytes, and its fourth to sixth arguments answer `0x8a720001` when null, so the first argument is an in-out structure whose fields are not known
- [libSceHmd2 gaze exports](../../../core/libs/prx/libSceHmd2/Export.cpp) - gaze argument registers and input/output directions are recovered. Result queries take a 16-byte size/handle parameter. The 24-byte foveated result contains size, status and a three-float direction; its trailing four bytes are untouched. The 56-byte full result still needs its eye-field semantics. Object selection uses a 120-byte parameter and 56-byte result whose fields remain incomplete. Its initialization and memory-query structures are recovered, including the 32-bit object count and memory size, memory pointer and 64-bit alignment. Calibration data descriptors contain a pointer and signed 32-bit size; calibration status contains two 32-bit selectors and three floats. The underlying calibration blob formats remain incomplete. Raw gaze input is mutable. CalibrationPoint is three floats passed by value in two SIMD registers; SetIpdOffset takes a byte and a float.
- [libSceHmd2 reprojection exports](../../../core/libs/prx/libSceHmd2/Export.cpp) - frame identifiers and predicted display times are 64-bit. Event setters accept a kernel event queue and 32-bit event ID, consumed by sceKernelTriggerUserEvent. Mirroring uses two memory pointers and a separate 32-byte mode/reserved option. Status and current-output queries write 104 and 32 bytes; those field layouts and the reprojection initialization fields remain incomplete. Positional-reprojection mode is a byte with values 0 through 5, not a boolean.
- [Reprojection parameter submission](../../../core/libs/prx/libSceHmd2/Export.cpp) - SetParam and SetParamWithBuffer take a 32-bit buffer-set ID, 64-bit frame ID, parameter pointer and reserved register slot. The parameter contains a layer pointer, signed count and optional 128-byte flags/reserved structure; plain and buffered layer strides are 328 and 472 bytes. Layer union fields remain incomplete. SetRenderConfig consumes three 64-bit slots; only bits 0 and 32 of the first can be nonzero. These exports remain unimplemented.