Zhaofeng Li zhaofengli

Running Third Party Kernel Extensions on Virtualization Framework macOS Guest VMs

As of macOS 12 (Monterey), Apple's Virtualization framework has nice support for macOS guest virtual machines, but with severe limitations: For example you can't install a macOS guest on Intel Macs, install guests with newer versions of macOS than the host, copy and paste between the host and the guest, or install third party kernel extensions in the guest. As usual for Apple, the functionality they do support is nicely implemented, but they've left out so much that the result is only marginally useful -- at least compared to

No, your cryptocurrency cannot work

Whenever the topic of Bitcoin's energy usage comes up, there's always a flood of hastily-constructed comments by people claiming that their favourite cryptocurrency isn't like Bitcoin, that their favourite cryptocurrency is energy-efficient and scalable and whatnot.

They're wrong, and are quite possibly trying to scam you. Let's look at why.

What is a cryptocurrency anyway?

There are plenty of intricate and complex articles trying to convince you that cryptocurrencies are the future. They usually heavily use jargon and vague terms, make vague promises, and generally give you a sense that there must be something there, but you always come away from them more confused than you were before.

Kubernetes and Arm

Getting rke and Rancher setup to run kubernetes on arm is interesting. There is no official support yet via rancher, although there is interest and some work done towards those efforts. This is my attempt at getting a cluster of 3 Pis (2 3Bs and 1 3B+) provisioned and registered to a rancher 2 server.

Prep

I've successfully completed this both with Hypriot OS 1.9.0 and the arm64 builds https://github.com/DieterReuter/image-builder-rpi64 Both times I used the same basic cloud-init setup

Stock firmware

Download

Extract images

XDA: payload.bin

Ninja support for CLion IDE (working with newer versions of clion)

This script enables Ninja-powered builds in CLion IDE by wrapping around CMake, which it uses. See my blog post for details.

Disclaimer

This script is provided AS IS with no guarantees given or responsibilities taken by the author. This script relies on undocumented features of CLion IDE and may lead to instability of build and/or IDE. Use it on your own risk under WTFPL terms.

	// ==UserScript==
	// @name @chaoticvibing Twitter Blue Nerd - twitter.com
	// @namespace Violentmonkey Scripts
	// @match ://.twitter.com/*
	// @match ://.x.com/*
	// @grant none
	// @version 1.9.2
	// @author @chaoticvibing - GH @busybox11
	// @description 11/9/2022, 11:45:28 PM
	// @updateURL https://gist.githubusercontent.com/busybox11/53c76f57a577a47a19fab649a76f18e3/raw

	// 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>

	#!/sbin/openrc-run

	command="/root/bin/pia-wg.sh"

	CONFIGDIR="${CONFIGDIR:-/var/cache/pia-wg}"
	CONFIG="${CONFIG:-/etc/pia-wg/pia-wg.conf}"

	extra_started_commands="reload"

	depend() {

	#include <stdio.h>
	#include <stdlib.h>
	#include <stdint.h>
	#ifdef _MSC_VER
	#include <intrin.h> /* for rdtscp and clflush */
	#pragma optimize("gt",on)
	#else
	#include <x86intrin.h> /* for rdtscp and clflush */
	#endif

	// Copyright (C) 2017, Uri Shaked
	// Loosely based on code samples provided by waveshare
	// License: MIT

	const DIN_PIN = 11;
	const CLK_PIN = 12;
	const CS_PIN = 13;
	const DC_PIN = 14;
	const RST_PIN = 15;
	const BUSY_PIN = 16;