CPU Mechanics for C++: Subroutines, Coroutines, and the Stack

Ever wondered what actually happens at the hardware level when your C++ code calls a function or suspends a coroutine? Understanding how the CPU coordinates with memory is the key to writing highly optimized, low-level systems software. This text-based course demystifies the execution pipeline, bridging the gap between high-level C++ abstractions and bare-metal CPU operations. You will transition from writing standard code to understanding exactly how the CPU manipulates registers and the stack during execution. What you'll learn: - Understand the foundational role of CPU registers, the program counter, and the stack pointer in function execution. - Analyze how the call stack manages local variables, parameters, and return addresses during subroutine calls. - Explore the mechanics of context switching and how CPUs save and restore state. - Demystify modern C++ coroutine suspension and resumption at the assembly level. - Compare the memory footprint and performance characteristics of stack-allocated subroutines versus heap-allocated coroutine frames. You will start with fundamental CPU architecture and assembly-level calling conventions before progressing to the mechanics of modern asynchronous execution and compiler-generated state machines. This course is designed for curious C++ developers and systems programming beginners who want to build a strong mental model of low-level execution without needing prior assembly experience. Start reading today to unlock a deeper understanding of how your code interacts with the CPU.