# libSceAppInstUtil technical debt

### Unknown function info

- [sceAppInstUtilAppInstallPkg](../../../core/libs/prx/libSceAppInstUtil/Export.cpp) - the package path is followed by an opaque 64-bit value sent to the install service; its meaning and pointer-versus-integer type remain unresolved.
- [sceAppInstUtilGetInstallProgressInfo, sceAppInstUtilGetInstallProgress and sceAppInstUtilGetPrimaryAppSlot](../../../core/libs/prx/libSceAppInstUtil/Export.cpp) - take a title-id string and an output pointer. The IPC replies contain 48, 4 and 4 bytes respectively; callers and reply producers are needed to establish the field types.
- [sceAppInstUtilAppPrepareOverwritePkg, sceAppInstUtilAppRecoverApp and sceAppInstUtilAppUnInstallTheme](../../../core/libs/prx/libSceAppInstUtil/Export.cpp) - absent from the supplied system module and from the supplied decompiled callers; the old export inventory establishes names but not prototypes.