Georgi Boiko pandasauce

3D Printing Guide w/Creality Ender 3 (v2)

This is just a dump of discoveries, experience, and general insights.

ℹ️ Does not contain any assembly related information.

ℹ️ A lot of this applies to 3D printers in general.

Divided into the following documentation, in order:

These comments are based on a few years of experience working with WSL. It's based on this tutorial:

https://blog.ropnop.com/configuring-a-pretty-and-usable-terminal-emulator-for-wsl/

And are basically updates to make it more relevant.

Opening a shell

In the past, to make the WSL run a command from cmd or somewhere else, you had to run the bash.exe program from windows, which fired up bash (and always bash) in the WSL and made it execute a command.

Frida logging helper

For adding temporary logging to help understand behavior. For when it is impractical to use Frida to instrument Frida.

Choose one of these and copy-paste it into e.g. lib/interfaces/session.vala, then use log_event ("name='%s'", name); to log.

When something appears to be hanging, try applying: x-async-debug.patch.

	#!/usr/bin/env bash

	echo 'Adding Dell repository...'
	# https://www.dell.com/community/XPS/XPS-13-9300-Does-fingerprint-reader-work-on-linux/td-p/7514958

	sudo sh -c 'cat > /etc/apt/sources.list.d/focal-dell.list << EOF
	deb http://dell.archive.canonical.com/updates/ focal-dell public
	# deb-src http://dell.archive.canonical.com/updates/ focal-dell public
	deb http://dell.archive.canonical.com/updates/ focal-oem public
	# deb-src http://dell.archive.canonical.com/updates/ focal-oem public

	"""
	Author: Matteo 'uf0' Malvica @matteomalvica
	Tested with IDA 7.5 and Py3
	Original plugin: https://github.com/FSecureLABS/win_driver_plugin
	"""

	def getopvalue(addr):
	"""Returns the value of the second operand to the instruction at `addr` masked to be a 32 bit value"""
	return idc.get_operand_value(addr, 1) & 0xffffffff

	#!/bin/bash
	# quick and dirty bash script to extract .gnu_debugdata section
	# from ELF binaries to generate an IDC script that adds these
	# names as symbols
	# --rpw, 2020-06-21

	SYMBOLFILE=debugdata_symbols.elf

	if [ $# -lt 1 ]; then
	echo "you need to supply a path to a binary"

	#!/bin/bash
	# quick and dirty bash script to extract .gnu_debugdata section
	# from ELF binaries to generate an IDC script that adds these
	# names as symbols
	# --rpw, 2020-06-21

	SYMBOLFILE=debugdata_symbols.elf

	if [ $# -lt 1 ]; then
	echo "you need to supply a path to a binary"

	#!/usr/bin/env python3
	"""A small example utility to demonstrate r2pipe scripting
	by extracting resources from a file.

	Written as an example for someone on IRC.

	--Towel, 2019
	"""

	import r2pipe

	# make sure You have installed the infinality patches

	export INFINALITY_FT_FILTER_PARAMS="8 17 50 17 8"
	export INFINALITY_FT_GRAYSCALE_FILTER_STRENGTH="0"
	export INFINALITY_FT_FRINGE_FILTER_STRENGTH="55"
	export INFINALITY_FT_AUTOHINT_HORIZONTAL_STEM_DARKEN_STRENGTH="0"
	export INFINALITY_FT_AUTOHINT_VERTICAL_STEM_DARKEN_STRENGTH="0"
	export INFINALITY_FT_WINDOWS_STYLE_SHARPENING_STRENGTH="20"
	export INFINALITY_FT_CHROMEOS_STYLE_SHARPENING_STRENGTH="0"
	export INFINALITY_FT_STEM_ALIGNMENT_STRENGTH="0"

	# 75.0.3770.142
	0x04b58615 7626 => 9090 0x04b58615
	0x04b5861d 31c0488945 => 9090909090 0x04b5861d

	Due to a beautiful bug in Chromium, it turns out you don't need this binary patch and can enable subpixel positioning by asking Chrome to disable it: https://bugs.chromium.org/p/chromium/issues/detail?id=824153#c39

	Needless to say, I won't be maintaining this gist any longer.