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AnyPS5 resolves a title's imports by NID, so a title that imports a system function that no AnyPS5 library provides fails to load with an unresolved import. This declares 222 such exports across 11 PS5 system libraries that AnyPS5 implements but does not provide. Each declaration calls NotImplemented_nid_no_patch and returns 0; none of them implements the function. A declaration with a credible prototype uses it and cites the source with a pinned commit; the rest are declared without parameters, which resolves the import without making an ABI claim. The technical-debt files record the limitation per library. The list is the intersection of the export table of the console's library (function symbols only), the pinned aerolib names and the functions not yet defined anywhere in the repo. Every name recomputes to its NID with tools/nid_names.py. libSceAudio3d and libSceVoice are left out because #8331 declares them.
10 lines
3.1 KiB
Markdown
10 lines
3.1 KiB
Markdown
# libSceUsbd technical debt
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### Silent stubs
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- [libSceUsbd](../../../core/libs/prx/libSceUsbd/Export.cpp) passes the calls through to the host with [libusb](https://github.com/libusb/libusb) built from the `3rdparty/libusb-cmake` submodule. Devices, handles and descriptors are libusb's own objects: the device, config, interface and endpoint descriptor layouts of [FreeBSD 11.4 libusb](https://github.com/freebsd/freebsd-src/blob/d106002967eff712894ab8b5337bbbff106ce5e0/lib/libusb/libusb.h) match libusb's field for field, which `static_assert` pins. Each one handed to the title is tracked, and a pointer this library did not return throws. Errors are libusb's codes mapped to `0x80240000 - code`, with `LIBUSB_ERROR_OTHER` at `0x802400FF`, following [shadPS4](https://github.com/shadps4-emu/shadPS4/blob/main/src/core/libraries/usbd/usbd.cpp); the null arguments FreeBSD libusb rejects ([libusb10.c](https://github.com/freebsd/freebsd-src/blob/d106002967eff712894ab8b5337bbbff106ce5e0/lib/libusb/libusb10.c), [libusb10_desc.c](https://github.com/freebsd/freebsd-src/blob/d106002967eff712894ab8b5337bbbff106ce5e0/lib/libusb/libusb10_desc.c), [libusb10_io.c](https://github.com/freebsd/freebsd-src/blob/d106002967eff712894ab8b5337bbbff106ce5e0/lib/libusb/libusb10_io.c)) return `0x80240002`, and `sceUsbdOpen` and `sceUsbdGetActiveConfigDescriptor` throw on a null device, which it dereferences. A submitted transfer is copied into a host transfer whose completion copies the status, actual length and iso packet results back and then calls the title's callback from `sceUsbdHandleEventsTimeout`; transfer flags other than short-not-ok and add-zero-packet throw. `sceUsbdAttachKernelDriver` returns 0 as FreeBSD's stub does, `sceUsbdCheckConnected` reports a device gone when reading its configuration fails with `LIBUSB_ERROR_NO_DEVICE` (FreeBSD asks the kernel directly), and `sceUsbdEventHandlingOk` returns 1. When the host has no USB access, initialization keeps the empty device list and event handling waits for its timeout. Opening, descriptors, string and control requests, interface claims and an asynchronous control transfer were checked against an Xbox 360 controller on Windows; the transfer layout, the argument lists, the error codes and isochronous transfers are unverified on PS5
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### Unknown function info
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- [sceUsbdClearHalt, sceUsbdDetachKernelDriver, sceUsbdEventHandlerActive, sceUsbdGetConfigDescriptorByValue, sceUsbdGetConfiguration, sceUsbdGetDescriptor, sceUsbdGetDevice, sceUsbdGetDeviceSpeed, sceUsbdGetMaxIsoPacketSize, sceUsbdGetMaxPacketSize, sceUsbdGetStringDescriptorAscii, sceUsbdHandleEvents, sceUsbdHandleEventsLocked, sceUsbdLockEventWaiters, sceUsbdLockEvents, sceUsbdOpenDeviceWithVidPid, sceUsbdSetInterfaceAltSetting, sceUsbdTryLockEvents, sceUsbdUnlockEventWaiters, sceUsbdUnlockEvents, sceUsbdWaitForEvent](../../../core/libs/prx/libSceUsbd/Export.cpp) (libSceUsbd) - signatures follow the console type database in [orbital](https://github.com/AlexAltea/orbital/blob/cc408367da6a6ebbf5ac1ac559fefeadc73b2831/tools/ida/db_types.json#L2268-L2322), but their behavior is unknown and each call throws; not measured on a console
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