Which Is the Pointer Associated with the Stack?

The Stack Pointer (SP) register is used to indicate the location of the last item put onto the stack. When you PUT something ONTO the stack (PUSH onto the stack), the SP is decremented before the item is placed on the stack.

What is top pointer in stack?

A stack pointer is a small register that stores the address of the last program request in a stack. A stack is a specialized buffer which stores data from the top down. ... The most recently entered request always resides at the top of the stack, and the program always takes requests from the top.

What does the stack pointer point to?

The stack pointer actually points to the last value that was stored, under the assumption that its size will match the operating mode of the processor (i.e., 16, 32, or 64 bits) to match the default width of the push/pop/call/ret instructions. This is the way my way-back memory says it works, too.