8051Enthusiast’s gists

8051Enthusiast / cursed_jumptable.a51

Last active October 3, 2021 03:12

cursed_jumptable.a51

	; Licensed under the MIT License:

	; Copyright (c) 2021 8051Enthusiast

	; Permission is hereby granted, free of charge, to any person obtaining a copy
	; of this software and associated documentation files (the "Software"), to deal
	; in the Software without restriction, including without limitation the rights
	; to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	; copies of the Software, and to permit persons to whom the Software is
	; furnished to do so, subject to the following conditions:

8051Enthusiast / quine.c

Created April 19, 2020 21:13

preprocess with `gcc -E -std=c99 quine.c -o quine.i` and compile with `gcc -std=gnu99 quine.i -o quine`

	#include <stdio.h>
	#ifdef A
	R"("
	#else
	#define A
	const char *s =
	#include __FILE__
	;
	#undef A
	#endif

8051Enthusiast / at51fun.py

Created July 6, 2020 15:21

Ghidra script to import functions found by at51's libfind into ghidra

	# Imports the functions found by at51 into the program
	import json
	import subprocess
	import sys.exit as exit
	state = getState()
	currentProgram = state.getCurrentProgram()
	filepath = currentProgram.getExecutablePath()
	# note: this won't work properly if the file is loaded at an offset
	proc = subprocess.Popen(["at51", "libfind", "-j", filepath],
	stdout = subprocess.PIPE, stderr = subprocess.PIPE)

8051Enthusiast / genptrref.py

Last active November 17, 2020 05:41

finds general pointer references in ghidra 8051 code

	state = getState()
	currentProgram = state.getCurrentProgram()
	def to_positive(b):
	if b >= 0:
	return b
	return b + 256

	def maybe_get_gptr_ref(b):
	if len(b) < 6:
	return None

8051Enthusiast / advent-of-code-6.sage

Last active December 14, 2022 03:34

advent-of-code-6.sage

num = {'a': 0x4f04adb47ec5294440250a2aca3cc81cdc7adcc8fc8f4df95a2ca92c41cc8b221a5626e429f89a2e4d317eeea16b3475bb6878be9b5584be0d64e409c14a57fd7a2c876b2361854cb7f8e49a13e9f41e924b0a2bd093228e964a91dcc9ed7e76f093657e4fe3c3b75a6ad442ef0d0a40fb6294d556792753657d03add51daf355ea669cc5c195b9fe87fe45e3a85bba8674a07e081372ceda9495e741ac26385cf67b3448d983edefd666856446975e2aaf7e5aa23fc6629125cc3f6b970ade2c118796975f47939a5d5dfbae9d77c690d3de380519c0224ed924d3d0606fd849595d57e7bdae9770b1d07dcf6e1ad3d46faa75298aa115f6de06f733a18cd96e34a2cc8483cd40461cee9d77d7d5c12c86ff2742e3060b01e41511b58d5a5563bf2dc22b61a4c4a44dac8e7fcee04dd07a58ae22483dcb628a08803e196863822707d2e25754113d3bd2d07189da675ca2c0b4e8cfa14c6543d09d4d96932d385ee7e6f8a8ec733fc54ceb63070067e6d269f201149c4d60d642cffafe2a8baff351a7972df6c1961ab1eeb11b4623f545c40e760cdf6e449ffe96a5af0281dffcf8e10e4a41b4e5840835271566e13f69d1c0619f2f7df39d3bb5b68ca6396ce61090c4ed22af4628e9d1d636ace86a84df7503fd84df678129fa43fe2af0c967a9532d8c1cbf0711193b60401f9b147e95fa83ece05a019

8051Enthusiast / allyourbase.py

Last active January 2, 2025 18:38

a script that tries to find a base address candidate for firmware by looking at string addresses and pointer target addresses

	#!/usr/bin/env python3
	import sys
	import re
	import argparse
	import math
	from typing import Literal
	import numpy as np


	def get_string_addresses(b: bytes, n: int) -> set[int]:

8051Enthusiast / fizzbuzz.c

Last active July 6, 2023 10:41 — forked from anonymous/fizzbuzz.c

A FizzBuzz program. Somehow. I don't know why it works. The long awaited sequel with proper allocation sizes.

	#include <stdio.h>
	#include <string.h>
	#include <stdlib.h>
	#include <gmp.h>

	char * polynomial="-74101463560860539810482394216134472786413399/404009590666424903383979388988167534591844018460526499864038804741201731572423877094984692537474105135297393596654648304117684895744000000000000000000000x^99 + 1786563401621773217421750502452955853226339781/1943688752347061390850759947022111850270039951356484879070977067483444756705819339975871373032521468004867185688372878439054154137600000000000000000000x^98 - 27321291157050372775340569532625689973429185264741/12024094960310264981666053243695462339042976739896622019763059664916718201560234437350734896948634081407660523709959770955883479040000000000000000000000x^97 + 4936870031754926645682423836151042176171669450909/1336493173680525187613977630110369004256312194947800263402124063124652591386915768177479078216982141485276408003996973457735680000000000000000000000x^96 - 24473118674386691114350902920738421254018653211816783/55093218603941649400531744530105211175454647

8051Enthusiast / polyrec-fizzbuzz.rs

Last active November 10, 2023 07:54

fucked up fizzbuzz (compile with `RUST_MIN_STACK=1000000000` and cranelift backend (and roughly 10GB of memory))

	#![recursion_limit = "1000000"]
	trait N {
	fn f<B: N, C: N, D: N, E: N, F: N, G: N, H: N, I: N>(fun: impl FnMut());
	}
	impl N for i8 {
	#[inline(never)]
	fn f<B: N, C: N, D: N, E: N, F: N, G: N, H: N, I: N>(mut fun: impl FnMut()) {
	fun();
	B::f::<Self, C, D, E, F, G, H, I>(fun)
	}

8051Enthusiast / crc32_append_zlib.py

Last active May 9, 2024 08:09

	# matrix from the `a^i` generator basis to the `a^(-2^i)` normal basis
	to_normal = [0x7f50f7fd, 0x95ecaead, 0x495ffebe, 0x90618596, 0x6e0d0395, 0x527b6ec5, 0x563d1cac, 0x1ee02779,
	0x287efd13, 0x5a66f53c, 0xdf3df773, 0xa0d25f82, 0x79357a5b, 0xe5c59050, 0x15508e51, 0x498da844,
	0xcaf65756, 0x4830c2cb, 0xa93db762, 0x8f7013bc, 0x2d337a9e, 0x50692fc1, 0x72e2c828, 0x24c6d422,
	0xa4186165, 0x47b809de, 0xa83497e0, 0x12636a11, 0x23dc04ef, 0x8931b508, 0x4498da84, 0xffffffff]
	# inverse of to_normal
	from_normal = [0xdb710641, 0x6d930ac3, 0x6d3d2d4d, 0x6567cb95, 0xd7125358, 0x5b358fd3, 0x2e9bb40b, 0x12a59a49,
	0x8df9403d, 0x5139de12, 0xba340226, 0x29c45641, 0x12fbc105, 0xecd30c55, 0x3755ebd8, 0x24ee460c,
	0x23783fcf, 0x479933fc, 0xa39442a5, 0x9ea0056d, 0xf42608f6, 0x20cacf04, 0x2a0cf83d, 0xeffd8645,
	0x2a39a67d, 0x640ebd82, 0x9dfd8792, 0x277402ab, 0xad31bc4f, 0x31536354, 0x5ea35fca, 0x52b55e39]