get_stack_pointer
first_frame = first_frame ?: get_stack_pointer(task, regs);
sp = get_stack_pointer(tsk, segv_regs);
stack = get_stack_pointer(task, segv_regs);
first_frame = first_frame ? : get_stack_pointer(task, regs);
stack = stack ?: get_stack_pointer(task, regs);
sp = get_stack_pointer(current, NULL);