AnyPS5/docs/dev/debt/libSceAppContent.md

libSceAppContent technical debt

Unknown function info

• libSceAppContent additional exports - these name/NID pairs are present in the 13.60 export inventory. Parameter lists, return types and behavior are unverified. Parameterless int declarations are import-resolution placeholders, not verified ABI prototypes; every entry throws through NotImplemented_nid_no_patch. No runtime functionality is implemented.

Name	NID
sceAppContentCheckBundleLicenseOnDisc	xZo2-418Wdo
sceAppContentDownloadDataGetBlockSize	9ht66cHTj7g
sceAppContentGetGameTrialsFlag	1saJukIkcKw
sceAppContentGetPlayableStatus	y8meQn-Qy5c

• sceAppContentDownloadDataGetAvailableSpaceKb (libSceAppContent) - a title whose param.json declares downloadDataSize 0 gets 0 KB and OK; the console's behaviour for a title without a download data area is unverified (it may return an error instead). KytyPS5 does not special-case it, and shadPS4 stubs 1048576 KB. One disassembled title (PPSA15246) calls it with the /download0 mount point and a zeroed 64-bit output, ignores the return value and multiplies the output by 1024, so for that title an error that leaves the output untouched and an OK with 0 KB look the same

• sceAppContentDownloadDataFormat (libSceAppContent) - empties the /download0 directory, creating it if needed. Imported by PPSA01317. A null mount point returns PARAMETER and another mount point returns NOT_MOUNTED as in sceAppContentTemporaryDataFormat and sceAppContentDownloadDataGetAvailableSpaceKb; the console's error codes for both and its behaviour with files still open are unverified

• libSceAppContent pending exports - 8 named callable exports are listed in the PS5 3.20 export table and were cross-checked against the same module in PS5 firmware 13.60. Their signatures and behaviour are unverified; the declarations use the no-parameter unknown-signature convention and throw through NotImplemented_nid_no_patch.

Functional

• Initialization - service readiness and boot attributes are not modeled; successful initialization returns a zero boot record. Initialization-state guards, SDK 0x01500000 repeated-initialization errors and reserved-field checks are recovered. SDK-dependent service-error translation remains incomplete.

• Additional content (libSceAppContent) is not installed or mounted: sceAppContentAddcontMount answers NOT_FOUND for every entitlement label and sceAppContentAddcontUnmount for every mount point, as no add-content mount is ever handed out; sceAppContentGetAddcontInfo answers DRM_NO_ENTITLEMENT for every label and sceAppContentGetAddcontInfoList reports 0 entries; sceAppContentAddcontEnqueueDownload answers PARAMETER for a null label and NOT_FOUND otherwise, since no download is ever queued; sceAppContentAddcontDelete answers PARAMETER for a null label and NOT_FOUND otherwise, since no additional content is ever installed. sceAppContentGetAddcontDownloadProgress answers PARAMETER for a null label or progress and NOT_FOUND otherwise, as dlc_emu does for a label that is not installed additional content, and never writes the progress. Its 16-byte layout (DataSize, then DownloadedSize, both 64-bit) follows SharpProspero and is unused here. The signatures of sceAppContentAddcontEnqueueDownload and sceAppContentGetAddcontDownloadProgress follow SharpProspero, and the signature of sceAppContentAddcontDelete follows dlc_emu; dlc_emu is not a console measurement and no console source gives the error codes, so the signatures and the error codes are unverified

• sceAppContentAddcontEnqueueDownloadByEntitlemetId, sceAppContentAddcontEnqueueDownloadSp, sceAppContentAddcontMountByEntitlemetId and sceAppContentAddcontShrink (libSceAppContent) - unverified on a PS5. After the initialization guard they answer PARAMETER for a null argument and NOT_FOUND otherwise, without writing the mount point, as dlc_emu does for content it does not know; the prototypes are dlc_emu's. dlc_emu rejects a padded label at every SDK while the label calls above check it only from SDK 0x01500000 or 0x03500000, so Sp and Shrink answer PARAMETER for one from SDK 0x03500000 and throw below it

• sceAppContentGetAddcontInfoByEntitlementId, sceAppContentGetAddcontInfoListByIroTag and sceAppContentGetPftFlag (libSceAppContent) - unverified on a PS5. After the initialization guard they give dlc_emu's answers for content it does not know: DRM_NO_ENTITLEMENT without writing the info, 0 entries for any tag (a null hitNum beside a list returns 0, unlike sceAppContentGetAddcontInfoList), and a PFT flag of 0, and PARAMETER for null arguments, with dlc_emu's prototypes

• sceAppContentGetEntitlementKey (libSceAppContent) - the service result without an entitlement is unverified: this model returns DRM_NO_ENTITLEMENT and leaves the 16-byte key unchanged. Initialization, null-pointer and SDK 0x01500000 label-padding checks match the reported firmware 13.42 module probe, run in an emulator, not on hardware. That module forwards service labels 0, 7, 8 and 0xFFFFFFFF without checking them; this library ignores the service label. The system service's own validation and errors remain unknown.

• Temporary app-content storage console behaviour and hardware return values are unverified, including behaviour with open files across unmount; host filesystem failures throw. Storage models one /temp0 mount, preserving files on unmount while rejecting new path resolutions until remount, and leaving existing open host descriptors usable. sceAppContentTemporaryDataMount delegates to sceAppContentTemporaryDataMount2 with option 1 (TEMPORARY_DATA_OPTION_FORMAT) to format on mount as shadPS4 does. Mount, format, space-query and unmount errors follow fpPS4; pointer ABI follows SharpProspero.