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stack pointer

The register that holds the address of the top of the stack (rsp, sp).

The stack pointer register (rsp on x86-64, sp on ARM64 and RISC-V) holds the address of the current top of the call stack.

Examples

  • On x86-64, push rax subtracts 8 from rsp, then stores rax at the new rsp.

See also

zero register return address
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