rethook_find_ret_addr
ip = rethook_find_ret_addr(state->task, state->sp, &state->kr_cur);
return rethook_find_ret_addr(state->task, (unsigned long)addr_p,
return rethook_find_ret_addr(tsk, (unsigned long)fp, cur);
unsigned long rethook_find_ret_addr(struct task_struct *tsk, unsigned long frame,
NOKPROBE_SYMBOL(rethook_find_ret_addr);