You seem to be purposely ignoring what I am saying so that you contradict something I didn't say. I doubt people are writing the software for medical devices b

You seem to be purposely ignoring what I am saying so that you contradict something I didn't say. I doubt people are writing the software for medical devices by directly writing to stack registers (which wouldn't mean the typical automatic instructions that push and pop the stack while automatically incrementing or decrementing the instruction pointer at the same time)