Libs: add libSceDiscMap HLE exports - #79
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Port the libSceDiscMap stubs from Kyty (InoriRus/Kyty, MIT) into the SysAbiExport model. Disc-installed titles probe these NIDs on most file accesses to decide whether a read must be redirected to the disc drive; answering that every request is already resident on internal storage keeps I/O on the regular file system path instead of failing with unresolved-import errors. - sceDiscMapIsRequestOnHDD (lbQKqsERhtE): validates args, writes 1 to the result pointer, returns 0 - fJgP+wqifno / ioKMruft1ek: zero-fill the three output pointers, return 0 (names not present in ps5_names.txt; kept as descriptive Unknown exports like the existing sceKernelUnknown* convention) - DISC_MAP_ERROR_INVALID_ARGUMENT (0x81100001) on null pointers, matching the documented libSceDiscMap error range - optional tracing via SHARPEMU_LOG_DISCMAP=1
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@par274 If I remember correctly, this ABI/API (DiscMap) is only available on the PS4, not the PS5 |
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These may be leftovers on the PS5. The real question is: which game called them? |
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It is actually used on the PlayStation 5. I looked through the PS5-3.20_Libs, and there's a file called libSceDiscMap |
Collaborator
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Yes, that's correct. I don't know whether any games actually call them, but they shouldn't hurt the semantics |
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What
Adds an HLE implementation of
libSceDiscMapas a newDiscMapExportsclass inSharpEmu.Libs, following the existingSysAbiExportconventions (validated pointers,OrbisGen2Resultcodes, optional env-gated tracing).Disc-installed titles call into
libSceDiscMapon most file accesses to decide whether a read has to be redirected to the Blu-ray drive. Without these exports the imports resolve toORBIS_GEN2_ERROR_NOT_FOUND, which titles can treat as an I/O failure. Reporting every request as already resident on internal storage keeps reads on the regular file system path.Exports
lbQKqsERhtEsceDiscMapIsRequestOnHDD1to the result pointer, returns0fJgP+wqifnosceDiscMapUnknownFJgP0ioKMruft1eksceDiscMapUnknownIoKM0DISC_MAP_ERROR_INVALID_ARGUMENT(0x81100001), consistent with the known0x811000xxlibSceDiscMap error range.ORBIS_GEN2_ERROR_MEMORY_FAULT.SHARPEMU_LOG_DISCMAP=1to trace calls (path, offset, size), matching theSHARPEMU_LOG_PTHREADSpattern.sceDiscMapIsRequestOnHDDis already inscripts/ps5_names.txt, so Aerolib resolves the name; the two unidentified NIDs keep descriptiveUnknownexport names like the existingsceKernelUnknown*entries.Source / attribution
Behavior is ported from the
LibDiscMap.cppstubs in Kyty (MIT), rewritten in C# for SharpEmu's export model. shadPS4's HLE discmap work was used as a cross-reference for the argument layout of the two unidentified NIDs (path, offset, nbytes, three out-pointers). This PR was prepared with the help of an AI assistant; flagging that for the maintainers' awareness.Testing
dotnet build SharpEmu.slnx— clean, 0 warnings / 0 errors (SDK 10.0.103)ModuleManager.RegisterFromAssembly: all three NIDs register and dispatch,sceDiscMapIsRequestOnHDDwrites1and returns0, null-pointer calls return0x81100001, and the triple-output NIDs zero their out-params.No existing NIDs are touched; the change is purely additive.