The most thoroughly commented linker script (probably)
While developing the firmware for Winterbloom's Castor & Pollux, I got very curious as to just what the Microchip/Atmel-provided linker script was doing.
If you've never heard of or seen a linker script before you're not alone. Most of us never even have to think about them, however, on memory constained embedded devices it's not uncommon to need to modify the default linker script.
The linker script controls how ld combines all of your .o files into a single .elf and how that resulting .elf file gets loaded by the target processor.
So I was staring at this script that made absolutely no sense to me. It's filled with incantations and mysterious symbols and there's no indication of what they're for or where they come from.
You can see this script in its entirety, comments and all, on GitHub. But if you'd like to read it here instead it's transcribed below.
Since the SAM D series are configured with only little endian support, "elf32-littlearm" is used across the board. This option seems to be included by Atmel/Microchip out of an abundance of caution, as arm-none-eabi-ld will do the right thing and use "elf32-littlearm" by default.
