How are function arguments passed in C?

Question

The only thing that I know about the mechanism of how C passes values is that it is done either through a register or the stack.

Register or Stack? Exactly how?

Answer 1

Both. And the conventions will vary by platform.

On x86, values are usually passed by stack. On x64, passing by register is preferred.

In all cases, if you have too many parameters, some will have to be passed by stack.

Refer to x86 calling conventions