The LncUtil collapsed dispatch entry, written by d4f2911b74 and
50c8103af2 (#9137), said its protected service implementations remain
unchanged. Of the functions whose signatures d4f2911b74 restored,
sceSystemServiceGetAppId answers for the running title since
7c83407e11 (#8354) and sceLncUtilGetAppId since 695041093b (#10801).
Only the status, GPU-crash, dialog-activation, shared-memory,
continue and VSH-ready calls still throw.
The sceSystemServiceUsbStorage* exports jump straight into the USB storage
module, so call the matching libSceUsbStorage export instead of throwing.
RequestMapWSB keeps its marker while its two declarations disagree on the
fourth argument and the output type.
BunnyFl ran firmware 13.42's libSceSystemService.sprx in an emulator and
recorded the checks these calls make before they pass a request on. A
null title ID or one whose length isn't 9 makes sceSystemServiceGetAppId
and sceLncUtilGetAppId return -1 and sceLncUtilIsAppLaunched return
0x80940005. A null output, list, count or user returns 0x80940005 from
the LncUtil and SystemService calls and 0x80e30003 from
sceShellCoreUtilGetUserFocus, before the app ID is looked at, and a null
sceLncUtilLoadExec path returns 0x80940005.
What the module passes on as a request still throws: another
9-character title ID, another app ID, a list capacity of 0 and an empty
sceLncUtilLoadExec path.
sceLncUtilLoadExec takes the same path and null-terminated argument
list, which the SystemService call passes on to it on the console. It
returns sceSystemServiceLoadExec's result: the same parameter errors,
the same refusals for paths it cannot start, and "exit" ends the title
in the same way.
sceLncUtilIsAppSuspended, sceSystemServiceIsAppSuspended and
sceLncUtilIsSpeculativeLaunch write false for the running title's app
ID. The title that calls them is running and has no shell to suspend
it. It was started from the host rather than by sceLncUtilLaunchApp,
so no LncLaunchParam asked for a speculative launch. Another app ID
and a null output still throw.
sceLncUtilGetAppLaunchedUser, sceSystemServiceGetAppLaunchedUser and
sceShellCoreUtilGetUserFocus write the initial user for the running
title's app ID. That is the user sceUserServiceGetInitialUser and
sceUserServiceGetForegroundUser report. Another app ID and a null user
pointer still throw.
sceLncUtilGetAppId and sceLncUtilIsAppLaunched accept the running
title's ID as sceSystemServiceGetAppId does, and
sceLncUtilGetAppIdOfRunningBigApp returns what
sceSystemServiceGetAppIdOfRunningBigApp returns. Both big-app lists
write the running title's app ID as their only entry, because AnyPS5
runs one title. Another title ID, a null pointer and a list capacity of
0 still throw.
Adrià