When you use a function in C/C++ (or most other programming languages) you are likely to pass it some parameters – data which may be processed by the function or give it information on what action is required. For the majority of programmers, outside of the world of embedded software, parameters are just a fact – no real issues. They are likely to be quite uninterested in how parameters are passed and how efficient and secure that process that might be. Embedded developers tend to want details. Efficient code is essential and avoiding possible bugs is always desirable. So, maybe a look at how parameter passing actually works might be useful … (more…)