what happens in a microcontroller or a CPU when i execute...

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Question by Arun
Submitted on 7/17/2004
Related FAQ: 8051 microcontroller FAQ
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what happens in a microcontroller or a CPU when i execute say a c or c++ program.can u just tell me about the loading of the stack and the transfer of control while a function is called?

Answer by swk
Submitted on 9/5/2004
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when the program control transfers to a function from a calling function. the stack size grows according to number of variable state dump. say if u have used only two variable in your called function. then only those two variables and some general purpose registers say Acc,B reg some times even Register banks get dumped provided those location are used by called functions. while returning to the calling func all the dumped variables states are pop-ed out and the variables states are restored back to its original value.

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