Registers

• Link register: a Link Register (LR) is a specialized CPU register, often designated as R14 in ARM architectures, that stores the return address of a subroutine or function call.

Concepts

• Mixing C with asm

Terminology

• BNE: branch if not equal
• BLX: branch, link, and exchange (used during call)
• BLS: branch if lower than
• BHI: branch if higher than