PS5 DLC-emu

Standalone PS5 replacement modules that expose DLC entries from /app0/dlc_emu.ini as owned content.

The project provides three replacement modules:

• libSceAppContent.prx / libSceAppContent.sprx
• libSceNpEntitlementAccess.prx / libSceNpEntitlementAccess.sprx
• libSceGameUpdate.prx / libSceGameUpdate.sprx

The modules are intended for titles that query AppContent, NpEntitlementAccess, or GameUpdate before enabling DLC. Native and configured DLC are not merged into one list: list and entitlement APIs return the configured overlay.

Runtime Configuration

The modules load /app0/dlc_emu.ini lazily on the first DLC-related call. The file is parsed once per module load and is limited to 32 KiB and 1024 valid entries.

If the file is missing, invalid, or contains no valid entries, fake entitlement queries return the corresponding empty, not-found, or no-entitlement result.

Minimal installed and active DLC:

[PSAC]
content_id=UP9000-PPSA01234_00-SAMPLECONTENT001
mount_point=/app0/addcont0

More complete example:

[PSAL]
content_id=UP9000-PPSA01234_00-SAMPLELICENSE001
label=SAMPLELICENSE001

[PSAC]
content_id=UP9000-PPSA01234_00-SAMPLECONTENT001
download_status=INSTALLED
mount_point=/app0/addcont0
entitlement_key=01040000000000000000000000000000
active_flag=true

[PSCONS]
label=SAMPLECONSUME1
use_count=0
use_limit=1
consumable=true
addcont_visible=false
unified_visible=true
active_date=0
inactive_date=18446744073709551615

Each section defines one DLC entry. Supported package-type sections:

Section	Value	Typical use
[NONE]	0	No package-type filtering
[PSGD]	1	Game data entitlement
[PSAC]	2	Additional content with file data
[PSAL]	3	Add-on or license-style entitlement
[PSCONS]	4	Consumable or product entitlement
[PSVC]	5	Virtual currency
[PSSUBS]	6	Subscription

Supported entry parameters:

Parameter	Default	Behavior
content_id	optional with an explicit label	Exactly 36 characters. Its final 16-character suffix becomes the default unified entitlement label. Addcont entries normally need it; store/service records may be label-only.
label / entitlement_label	content ID suffix	Optional 1-16 character alphanumeric unified entitlement label. Required for unified/addcont visibility when content_id is omitted.
download_status	INSTALLED	NO_EXTRA_DATA, NO_IN_QUEUE, DOWNLOADING, DOWNLOAD_SUSPENDED, or INSTALLED.
mount_point	/app0/addcontN for mountable entries	Existing path of at most 15 characters returned by fake mount APIs. DLC-emu does not create the directory.
entitlement_key	entry index + 1024	16-byte key encoded as 32 hexadecimal characters. The generated default stores the integer in the first eight bytes.
service_label	unset	Optional 1-6 character alphanumeric label used by service-entitlement APIs.
np_service_label	-1	Numeric SceNpServiceLabel in 0..UINT32_MAX; exact -1 accepts calls for any service.
addcont_visible	true for PSAC/PSAL	Exposes the entry through AppContent and NpEntitlementAccess addcont APIs.
unified_visible	true when a unified label exists	Exposes the entry through unified entitlement APIs.
service_visible	true when service_label exists	Exposes the entry through service entitlement APIs.
mountable	true for PSAC	Allows mount calls; also requires addcont visibility, active state, INSTALLED, and a mount point.
active_flag	true	Returned active state; inactive entries are omitted from addcont APIs.
active_date	0	Returned SceRtcTick.tick activation date.
inactive_date	UINT64_MAX	Returned expiration date.
use_count	0	Initial consumed count. Successful consumption increments it.
use_limit	1	Current remaining consumable balance. Successful consumption decrements it and poll returns the new value.
consumable / is_consumable	true for PSCONS/PSVC	Enables consume requests.

Entries with duplicate unified or service labels are skipped. Invalid content IDs, labels, keys, usage values, or mount points are also skipped. At least one visibility surface must be enabled, and mountable=true requires addcont_visible=true.

Emulated Behavior

AppContent

Entries with addcont_visible=true are exposed through the addcont list, info, IRO info, entitlement-key, mount, unmount, delete, license, playable-status, and download progress APIs.

• Addcont lists return active addcont-visible entries and preserve their configured download_status.
• Mount succeeds only for active, addcont-visible, mountable entries with status INSTALLED. It returns the configured pre-existing path and tracks mounted state locally.
• Addcont enqueue, delete, and shrink calls are successful no-ops only for known active addcont-visible labels or entitlement IDs.
• Bundle-license and playable-status checks succeed only for known active addcont-visible labels.
• SKU is reported as full; Game Trials and PFT flags are reported as OFF.
• Addcont download progress always reports a completed 1/1 download.

Bundle-license, playable-status, addcont enqueue, delete, shrink, download progress, info, key, and mount calls return their normal not-found or no-entitlement result for unknown or non-addcont labels.

Storage-management operations remain native AppContent RPC calls. This includes TemporaryData, DownloadData, download shrink/expand, region, patch-install, and store-country APIs. In particular, sceAppContentDownload2Shrink and sceAppContentDownload2Expand forward their opaque download handle without dereferencing it.

NpEntitlementAccess

NpEntitlementAccess is emulated locally from the configuration file.

• Addcont list/info APIs, including the Individual variants, expose active addcont-visible entries using SceNpEntitlementAccessAddcontEntitlementInfo.
• Unified and service entitlement request/poll APIs return configured package type, active state, dates, usage counts, label filtering, and pagination.
• Entitlement-key queries return the configured or generated key.
• Consumable requests increment use_count, decrement the remaining use_limit, and preserve idempotency for repeated transaction IDs.
• SKU is reported as full; Game Trials and PFT flags are reported as OFF.
• Async requests are typed and independently tracked. Abort/delete and wrong poll-function use return request-lifecycle errors. State remains in memory for the current module lifetime.

GameUpdate

GameUpdate is emulated locally with initialization and request lifecycle validation.

• Up to 32 requests may exist simultaneously.
• Invalid structure sizes, unknown requests, aborted requests, and invalid initialization order return the corresponding errors.
• sceGameUpdateCheck and sceGameUpdateCheckTitle report no title or addcont update.
• sceGameUpdateGetAddcontLatestVersion returns success with found=false for every valid label.

Logging

Logging is disabled by default. Enable SCE_DLC_EMU_LOG in src/dlc_modules/dlc_config.h or through DlcExtraPreprocessorDefinitions. Logs are written to /app0/dlc_emu.log. SCE_DLC_EMU_LOG_KERNEL_OUT also enables kernel debug output.

Known Limitations

• The modules do not discover or merge native installed DLC into configured lists.
• Mount paths must already exist; no files or directories are created.
• Runtime state is in memory and resets when the replacement module unloads.
• Internal APIs without public declarations were reconstructed from observed NIDs, neighboring APIs, and RPC behavior. They require validation on the target firmware/title.

Thanks

Thanks to @idlesauce for https://github.com/idlesauce/ps4-eboot-dlc-patcher