RO services

Prior to 3.0.0, ro was included as part of Loader services. Despite the separation, the service name ldr:ro is retained to maintain compatibility with old games.

ldr:ro, ro:1

[1.0.0-2.3.0] This is "nn::ldr::detail::IRoInterface"

[3.0.0+] This is "nn::ro::detail::IRoInterface".

[7.0.0+] ro:1 was added, and also creates nn::ro::detail::IRoInterface objects.

Cmd	Name
0	#LoadNro
1	UnloadNro
2	#LoadNrr
3	UnloadNrr
4	#Initialize
10	[7.0.0+] #LoadNrrEx

LoadNro

Word	Value
0	0x00000004
1	0x80000012
2	0x00000001
0-1	Pid
0	"SCFI"
1	0x00000000
2	Always 0.
3	Nro heap address
4	Nro size
5	Bss backing heap address
6	Bss size

LoadNrr

[7.0.0+] A new 8-bit field at NRR + 0x33C (previously padding) must be 0 for this function to succeed.

Word	Value
0	0x00000004
1	0x8000000E
2	0x00000001
0-1	Pid
0	"SFCI"
1	0x00000002
2	Always 0.
3	Nrr address
4	Nrr size

Initialize

Word	Value
0	0x00000004
1	0x8000000A
2	0x00000003
0-1	Pid
2	Process handle (0xFFFF8001)
0	"SFCI"
1	0x00000004
2	Always 0.

LoadNrrEx

Takes in a u64 nrr_address, a u64 nrr_size, a pid descriptor, and a process handle.

First, this validates that the pid descriptor matches the pid for the process handle sent to this->Initialize() earlier.

Then, this calls the same function as LoadNrr, except using the passed process handle instead of the one sent to Initialize.

When called from an ro:1 session, the field at NRR header + 0x33C must be 0x1. When called from ldr:ro session, the field at NRR header + 0x33C must be 0x0.