Open and closed subroutines, the argument and result registers, and how blBranch with link; writes return address to X30. and retReturn: jump to X30 (or Xn). Returning from main ends the program. carry the return address.
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Multiple choice
What is the primary advantage of using an open (inline) subroutine?
Multiple choice
A program uses the instruction bl to call a subroutine. What instruction would normally be used to return to the calling code?
Multiple choice
Under the AArch64 procedure call convention, where are the first eight integer or pointer arguments normally passed to a procedure?
Multiple choice
A subroutine uses a stack frame to keep track of its local data. Which register is conventionally used as the frame pointer in AArch64?
Multiple choice
What is a key characteristic of a closed subroutine?
Multiple choice
When a bl instruction calls a subroutine, what happens to the return address?