[Help] Skyline Build Crashes in Smash and Other Games

[TheGreenPlanet]

Hi! Im new to switch modding. I'm trying to develop a skyline plugin for another game other than smash. I have everything setup, meaning:

• Ryujinx running my own copy of the game
• A generated main.npdm with the game specific header, svc's and permissions from the json template in this repo.
• A simple rust cargo-skyline plugin that does println!("Hello from skyline plugin").
• The skyline_logger_rust.exe application to receive the prints and logs.

Im now trying to build skyline so that I can potentially add custom fixes for crashes now, and later on.

What im doing:

1. Running make skyline
2. Renaming skyline.nso to subsdk9
3. Moving subsdk9 to the execfs/ dir

However, the game always crash.

What doesn't work:

• Reusing the Smash subsdk9 for my target game: Crash.
• Using my compiled version of Skyline as subsdk9 in the Smash execfs/ dir with a known working plugin + working main.npdm: Crash.
• Bindiffing my subsdk9 with the Smash subsdk9 in IDA to see what I'm missing in order to get skyline to work on Smash (which would be one step forward): i couldn't find any difference, but i must have missed something.
• I've also tried dumping known api names and offsets from the sdk belonging to the game into the syms.ld file using the genLinkerScript.py script: Crash.

What has worked:

• Using the provided subsdk9 and main.npdm from this repo + my simple print plugin: prints the "Hello from skyline plugin" in the skyline_logger_rust.exe.

Questions:

1. Is the syms.ld file even used?
2. If it's used, Is it to "patch" non working import symbols with their corresponding hardcoded mem addresses from the game sdk?
3. If so, what counts as the "base address offset"?
4. Am i missing something? Due to little documentation, I've just had to guess everything.

For reference, the following crash log is from running Smash with main.npdm (from releases in this repo) + libtraining_modpack.nro and my compiled version of skyline subsdk9:

00:00:06.855 |W| HLE.GuestThread.46 KernelSvc : GetInfo(value: 0x0000000000000000) = InvalidHandle
00:00:06.855 |W| HLE.GuestThread.46 KernelSvc : GetInfo(value: 0x0000000000000000) = InvalidHandle
00:00:06.855 |W| HLE.GuestThread.46 KernelSvc : GetInfo(value: 0x0000000000000000) = InvalidEnumValue
00:00:06.855 |W| HLE.GuestThread.46 KernelSvc : GetInfo(value: 0x0000000000000000) = InvalidHandle
00:00:06.855 |W| HLE.GuestThread.46 KernelSvc : GetInfo(value: 0x0000000000000000) = InvalidHandle
00:00:06.865 |W| HLE.GuestThread.46 KernelSvc : ControlCodeMemory() = InvalidEnumValue
00:00:07.505 |W| GUI.WindowThread Hid Remap: No matching controllers found. Application requests 'ProController, Handheld, JoyconPair, JoyconLeft, JoyconRight' on 'Player1, Player2, Player3, Player4, Player5, Player6, Player7, Player8, Handheld'
00:00:08.106 |S| HLE.OsThread.47 ServiceAm SetFocusHandlingMode: Stubbed. {unknownFlag1: True ; unknownFlag2: False ; unknownFlag3: True}
00:00:08.106 |S| HLE.OsThread.47 ServiceAm SetOutOfFocusSuspendingEnabled: Stubbed. {outOfFocusSuspendingEnabled: False}
00:00:08.108 |S| HLE.OsThread.47 ServiceAm SetGamePlayRecordingState: Stubbed. {_gamePlayRecordingState: False}
00:00:08.313 |I| HLE.GuestThread.46 Cpu PrintGuestStackTrace: Guest stack trace:
Process: Super Smash Bros. Ultimate, PID: 127
   0x000000000ac879c4	main:0x27839c4	
   0x0000000008761804	main:0x25d804	nnMain:0x0374
   0x000000000f13d9bc	sdk:0x849bc	nn::init::Start(unsigned long, unsigned long, void (*)(), void (*)()):0x004c
   0x00000000085000ac	rtld:0x00ac	


00:00:08.314 |I| HLE.GuestThread.46 Cpu PrintGuestRegisterPrintout: Guest CPU registers:
	X[00]:	0x0000000000000000
	X[01]:	0x000000100ff02a70 (SP:-0x0110)
	X[02]:	0x0000000000000005
	X[03]:	0x0000000000000000
	X[04]:	0x0000000000000008
	X[05]:	0x0000000000000000
	X[06]:	0x0000000000000000
	X[07]:	0x0000000000000000
	X[08]:	0x000000100ff02a76 (SP:-0x0116)
	X[09]:	0x000000000000002f
	X[10]:	0x000000100ff02a95 (SP:-0x0135)
	X[11]:	0xfefefefefeff0001
	X[12]:	0x000000000000000f
	X[13]:	0x0000001100710424
	X[14]:	0x0000000000000000
	X[15]:	0x0000000000000088
	X[16]:	0x000000000f0b2500
	X[17]:	0x000000000f552090 (sdk:0x499090)	=> memcpy
	X[18]:	0x0000000000000000
	X[19]:	0x0000000000000000
	X[20]:	0x000000100ff02a70 (SP:-0x0110)
	X[21]:	0x000000100ff02b49 (SP:-0x01e9)
	X[22]:	0x0000000000000120
	X[23]:	0x0000000000000000
	X[24]:	0x0000000000000000
	X[25]:	0x000000100ff035e8 (SP:-0x0c88)
	X[26]:	0x0000000000000000
	X[27]:	0x0000000000000000
	X[28]:	0x0000000000000000
	FP:	0x000000100ff02fb0 (SP:-0x0650)
	LR:	0x000000000f09b240
	SP:	0x000000100ff02960 (SP)
	PC:	0x000000000f552090 (sdk:0x499090)	=> memcpy


00:00:08.314 |E| HLE.GuestThread.46 Cpu InvalidAccessHandler: Invalid memory access at virtual address 0x0000000000000000.