David Buchanan DavidBuchanan314

This is a mini-tutorial of sorts for getting started with gdb on the Switch, with the target audience being people who want to mod and/or reverse games, with no prerequisite knowledge of gdb. The goal will be to walk you through some of the basic workflows needed to use a debugger on the Switch, while being brief enough for skimming for when you forget things.

If some part is unclear, your OS doesn't have install instructions, or you feel part of your workflow should be added here, feel free to comment any additions.

(If you only need a quick reference Jump to the Appendix)

Installing GDB

First off you'll need a version of GDB compatible with aarch64. This can be obtained via either a distribution of

This is just a dump of some interesting undocumented features of webOS (3.8 specifically, on early 2018 4k LG TV) and other development-related tips.

Homebrew app ideas

OpenVPN frontend (OpenVPN itself is easily buildable and runs on webOS TVs: https://discord.com/channels/407937994037919756/835489130967859251/906943542457401395)
App autostart manager - dynamically update arbitrary app config and register it as input (see Registering an app as an input)
webos-vncserver frontend with autostart option
Package hyperiond into Piccap directly
Quick Screenshot (expose HTTP port that just returns PNG of current screen contents)
Custom IR remote codes editor/updater/blaster

Sometimes you need a 2048-bit RSA keypair for testing various things.

If you, like myself, have a child's sense of humor, I offer the following for your general use:

P = 19
Q = 1696986749729493925354392349339746171297507422986462747526968361144447230710192316397327889522451749459854070558277878297255552508603806832852079596337539247651161831569525505882103311631577368514276343192042634740927726070847704397913856975832811679847928433261678072951551065705680482548543833651752439700272736498378724153330763357721354498194000536297732323628263256733931353143625854828275237159155585342783077681713929284136658773985266864804093157854331138230313706015557050002740810464618031715670281442110238274404626065924786185264268216336867948322976979393032640085259926883014490947373494538254895109731

N = 0xFF69696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696

iTunes-less Classic iPod Restore Guide

I have tested this on a classic 4th-gen monochrome "clickwheel" iPod. I imagine this process works similarly for iPods of the same era. I'm not the first person to do this, but a lot of documentation is on dead wikis and is generally hard to come by.

Extract your firmware image from an .ipsw file, set the IPOD and FW_IMAGE variables in the bash script, and run it as root. Then cross your fingers.

If everything worked, the partition layout should look something like this:

Disk /dev/sdc: 119.08 GiB, 127865454080 bytes, 249737215 sectors

Think twice before abandoning Xorg. Wayland breaks everything!

Hence, if you are interested in existing applications to "just work" without the need for adjustments, then you may be better off avoiding Wayland.

Wayland solves no issues I have but breaks almost everything I need. Even the most basic, most simple things (like xkill) - in this case with no obvious replacement. And usually it stays broken, because the Wayland folks mostly seem to care about Automotive, Gnome, maybe KDE - and alienating everyone else (e.g., people using just an X11 window manager or something like GNUstep) in the process.

As 2024 is winding down:

	#!/usr/bin/env python3
	# SPDX-License-Identifier: 0BSD or CC0-1.0 or MIT-0 or Unlicense
	# Copyright (c) 2023, Ryan Castellucci, No Rights Reserved

	import io, sys
	import datetime
	import argparse
	import requests
	import operator
	import struct

	// To compile: clang++ -arch x86_64 -arch arm64 -std=c++20 library_injector.cpp -lbsm -lEndpointSecurity -o library_injector,
	// then codesign with com.apple.developer.endpoint-security.client and run the
	// program as root.

	#include <EndpointSecurity/EndpointSecurity.h>
	#include <algorithm>
	#include <array>
	#include <bsm/libbsm.h>
	#include <cstddef>
	#include <cstdint>

	// SPDX-FileCopyrightText: 2020 Nicolás Alvarez <[email protected]>
	//
	// SPDX-License-Identifier: MIT

	#include <boost/preprocessor.hpp>

	// Utilities to convert from numbers (bytes) or words (highbyte,lowbyte pairs)
	// into nibbles.

	// a -> (a1,a0)

	#define F\
	for(i=l;i\
	<l*4; i++)
	main(){int
	i,j,w=512,
	n,l=w*w,o[
	]={~w,-w,-
	w+1,-1,1,w
	-1,w,w+1},
	b[l*5];F b

	// Unscaled values for kOpsinAbsorbanceBias
	const kB0 = 0.96723368009523958;
	const kB1 = kB0;
	const kB2 = kB0;
	const kScale = 255.0;
	const kScaleR = 1.0;
	const kScaleG = 1.0;
	const kInvScaleR = 1.0;
	const kInvScaleG = 1.0;