scturtle

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

Let's list here crates that enhance Rust as a language.

It not "batteries" like in stdx, but Rust-specific crates for workarounds for various missing features and experimental ideals from non-accepted/postponed RFCs, or just hacky tricks.

The list is supposed to contain (mostly) crates that are internal to Rust, not ones for making Rust deal with "external world" like other languages bindings, file formats, protocols and so on.

Primary focus should be on crates that are not easy to find by conventional means (e.g. no algorithm name, format or protocol to search for).

Note that quality of the listed crates may vary from proof-of-concept to stable-and-widely-used.

ANSI Escape Sequences

Standard escape codes are prefixed with Escape:

Ctrl-Key: ^[
Octal: \033
Unicode: \u001b
Hexadecimal: \x1B
Decimal: 27

I've never had great understanding of launchctl but the deprecation of the old commands with launchctl 2 (10.10) has been terrible as all resources only cover the old commands, and documentation for Apple utilities is generally disgracefully bad, with launchctl not dissembling.

Mad props to https://babodee.wordpress.com/2016/04/09/launchctl-2-0-syntax/ which contains most details

domains

Internally, launchd has several domains, but launchctl 1 would only ask for service names,

Increase key repeat rate on macOS

Settings: System Preferences » Keyboard » Key Repeat/Delay Until Repeat

Use the commands below to increase the key repeat rate on macOS beyond the possible settings via the user interface. The changes aren't applied until you restart your computer.

Source: https://apple.stackexchange.com/a/83923

The Borrow Checker

This pass has the job of enforcing memory safety. This is a subtle topic. This docs aim to explain both the practice and the theory behind the borrow checker. They start with a high-level overview of how it works, and then proceed to dive into the theoretical background. Finally, they go into detail on some of the more subtle aspects.

	;; nano-emacs.el --- NANO Emacs (minimal version) -- lexical-binding: t --

	;; Copyright (c) 2025 Nicolas P. Rougier
	;; Released under the GNU General Public License 3.0
	;; Author: Nicolas P. Rougier <[email protected]>
	;; URL: https://github.com/rougier/nano-emacs

	;; This is NANO Emacs in 256 lines, without any dependency
	;; Usage (command line): emacs -Q -l nano.el -[light\|dark]

	import os

	import torch
	import torch.distributed as dist
	import lovely_tensors as lt; lt.monkey_patch()


	def split_tensor(data: torch.Tensor, dim: int) -> torch.Tensor:
	rank = dist.get_rank()
	world_size = dist.get_world_size()

	#VERBOSE=0 torchrun --nproc_per_node 3 self_contained_pp_LOC.py
	import os, random, numpy as np, torch, torch.nn as nn, torch.distributed as dist, torch.nn.functional as F
	from torch.optim import AdamW
	from torch.utils.data import DataLoader, DistributedSampler
	from datasets import load_dataset
	from transformers import AutoConfig, AutoModelForCausalLM, AutoTokenizer

	STEP, local_rank, world_size, verbose = 0, int(os.environ["LOCAL_RANK"]), int(os.environ["WORLD_SIZE"]), os.environ.get("VERBOSE", "0") == "1"

	def set_all_seed(seed):

	#include <switch.h>
	#include <cstdlib>
	#include <cstring>
	#include <cstdio>
	#include <cstdarg>
	#include <vector>
	#include <memory>
	#include <bit>
	#include <experimental/scope>