self-modifying – Make Me Engineer

How to write self-modifying code in x86 assembly

May 10, 2023 by Tarik

wow, this turned out to be a lot more painful than I expected. 100% of the pain was linux protecting the program from being overwritten and/or executing data. Two solutions shown below. And a lot of googling was involved so the somewhat simple put some instruction bytes and execute them was mine, the mprotect and … Read more

Edit, save, self-modifying HTML document; format generated HTML, JavaScript

June 10, 2022 by Tarik

Your replace function replaces until the /textarea> that is in your clone variable. It doesn’t do it from the first file because there’s a newline character after textarea in the html. One way to fix it would be to add a newline character in the generated html. Like this: var clone = [“<!doctype html><head></head><body><textarea>” + … Read more

Observing stale instruction fetching on x86 with self-modifying code

May 18, 2022 by Tarik