zesterer’s gists

zesterer / boot.s

Created February 21, 2016 10:37

	// We're writing this code in 32-bit protected mode for now
	.code32

	// Declare multiboot header creation constants

	.set ALIGN, 1 << 0 // Align loaded modules on page boundaries
	.set MEMINFO, 1 << 1 // Provide memory map
	.set FLAGS, ALIGN \| MEMINFO // Multiboot 'flag' field
	.set MAGIC, 0x1BADB002 // Magic number helps bootloader find the header
	.set CHECKSUM, -(MAGIC + FLAGS) // Checksum of the above to prove it's multiboot

zesterer / linker.ld

Created February 21, 2016 10:44

	/* The bootloader will look at this image and start execution at the symbol
	designated as the entry point. */
	ENTRY(_bootstrap)

	/* Tell where the various sections of the object files will be put in the final
	kernel image. */
	SECTIONS
	{
	/* Begin putting sections at 1 MiB, a conventional place for kernels to be
	loaded at by the bootloader. */

zesterer / gist:470d60b9be804b60256b7f0dd0ae00c8

Created April 3, 2017 16:20

readelf --relocs build-default/kernel/x86/amd64/arch.cpp

	[17:05][joshua@archbox][~/Documents/Projects/tupai-dev] readelf --relocs build-default/kernel/x86/amd64/arch.o

	Relocation section '.rela.text' at offset 0x6a0 contains 1 entries:
	Offset Info Type Sym. Value Sym. Name + Addend
	000000000002 000500000001 R_X86_64_64 0000000000000000 .rodata.str1.1 + 0

	Relocation section '.rela.debug_info' at offset 0x6b8 contains 25 entries:
	Offset Info Type Sym. Value Sym. Name + Addend
	000000000006 00080000000a R_X86_64_32 0000000000000000 .debug_abbrev + 0
	00000000000c 000b0000000a R_X86_64_32 0000000000000000 .debug_str + b3

zesterer / refbucket.cpp

Created August 29, 2017 10:46

Thread-safe reference-based object bucket in C++

zesterer / hover.py

Created March 4, 2018 22:48

Kerbal Space Program Hovering PID Controller

	import krpc, time, math

	conn = krpc.connect(name = "PID Hover")
	vessel = conn.space_center.active_vessel

	# Find the craft height (altitude from command module and bottom of craft are different)
	bbox = vessel.bounding_box(vessel.reference_frame)
	HEIGHT = max(abs(bbox[0][1]), abs(bbox[1][1]))

	print("Now controlling '" + vessel.name + "'")

zesterer / coord.rs

Created July 16, 2018 08:27

A few tests for coord

	#![allow(unused_imports)]
	#![allow(dead_code)]

	extern crate core;

	use core::ops::{
	Add, Sub, Mul, Div,
	AddAssign, SubAssign, MulAssign, DivAssign,
	};
	use core::fmt;

zesterer / bf.c

Last active July 29, 2018 17:36

Brainfuck Interpreter In C

	// Run like: ./bf <myfile.bf>

	#include<stdio.h>
	main(int u,int*v){char t[1<<12]={0,},c[1<<16];int m=fread(c,1,1<<16,fopen(++v,"r"));
	charp=t,n=0,x=0,i=c;for(;i-c<m;){
	i==62?p++:i==60?p--:i==43?++p:i==45?--p:i==46?write(1,p,1):i==44?read(0,p,1):0;
	if((i==91&&!p)\|\|(i==93&&p)){p?n--:n++;for(;n;)(p?--i:++i)==91?n++:i==93?n--:0;*p?0:i--;}i++;}}

zesterer / markov4.py

Created July 31, 2018 15:37

4th Order Markov Chain Generator

	import random

	by_word = True
	text = open("test.txt").read().replace(" ", " ")

	if by_word:
	text = text.split(" ")

	freq = {}

zesterer / procedural.c

Created July 31, 2018 16:18

C code, procedurally generated using a 4th-order Markov chain generator

	///
	/// This code is procedurally generated using the 4th-order Markov chain generator
	///
	/// Original training material: https://github.com/vurtun/nuklear/blob/master/nuklear.h
	///

	const struct nk_image s;
	* a = (nk_byte) tmp[3];
	}
	NK_API void

zesterer / postbox.rs

Created July 31, 2018 16:48

	struct Client {
	jobs: Jobs,
	depot: PostDepot,
	}

	impl Client {
	fn new() -> Client {
	Client { jobs: Jobs::new(), depot: PostDepot::new() }
	}

	// Run like: ./bf <myfile.bf>

	#include<stdio.h>
	main(int u,int*v){char t[1<<12]={0,},c[1<<16];int m=fread(c,1,1<<16,fopen(++v,"r"));
	charp=t,n=0,x=0,i=c;for(;i-c<m;){
	i==62?p++:i==60?p--:i==43?++p:i==45?--p:i==46?write(1,p,1):i==44?read(0,p,1):0;
	if((i==91&&!p)\|\|(i==93&&p)){p?n--:n++;for(;n;)(p?--i:++i)==91?n++:i==93?n--:0;*p?0:i--;}i++;}}

Joshua Barretto zesterer