fatal:u

This is "nn::fatalsrv::IService".

Cmd Name
0 ThrowFatal
1 ThrowFatalWithPolicy
2 #ThrowFatalWithCpuContext

ThrowFatalWithCpuContext

Takes an input u64 errorcode and an unknown u64(TID maybe?). It also takes a type-0x15 error buffer and a pid-descriptor. The error buffer contains a stack trace. The stack trace address count is stored at errorbuffer+0x240 and the addresses are stored at errorbuffer+0x130+i*8 where i = 0->address count

fatal:p

This is "nn::fatalsrv::IPrivateService".

Cmd Name
0 GetFatalEvent
10 [14.0.0+] GetFatalContext

FatalType

Value Name
0 ErrorReportAndErrorScreen
1 ErrorReport
2 [3.0.0+] ErrorScreen