Embedded Journeys

A quick discovery I made while dumping ELF files with hexdump. A single flag changed the output in a way that made me rethink what I was seeing. Turns out, understanding how hexdump works under the hood is more important than it looks at first glance

We explore what happens when the GNU linker turns an object file into an ELF executable on Raspberry Pi, diving into entry points, program headers, and binary layouts.

This post dives deeper into the format of the object files generated by the ARM Assembler: ELF files. An object file is parsed by hand, just to get a better understanding of what is going on!

The journey has got to start somewhere! What could be better than a “Hello World!” application in ARM assembly on my Raspberry Pi to kick this off? It took me to the GNU assembler, syscalls and provided me glimpses into the ELF format.