Prerequisite For this article, you’ll need the following knowledge: Basic C understanding (Memory, Stack, Heap, Syscall). (Optional) x86_64 Assembly Preamble Xavier Login is a freshly employee who got his internship in a big company. On his first days, he was asked to do a little program to validate an input by verifying that a magic byte was set. So this was the first attempt of Xavier: magic_checker.c 1 2 3 4 5 6 7 8 9 int is_magic_byte_valid(char *buffer) { return buffer[10] == 'A'; } int mai...