Following the Saved-RBP Chain

• Each frame's saved RBP points at the previous frame's saved RBP.
• This forms a linked list of frames walking toward higher addresses.
• Just above each saved RBP sits that frame's return address.
• A debugger reconstructs a backtrace by walking this chain:
• Read return address at [rbp+8].
• Follow saved RBP at [rbp] to the next frame.
• Repeat until the chain ends.
• Compilers may omit the frame pointer (-fomit-frame-pointer); then tools rely on .eh_frame unwind data instead.