kprobe_on_func_entry
extern int kprobe_on_func_entry(kprobe_opcode_t *addr, const char *sym, unsigned long offset);
ret = kprobe_on_func_entry(rp->kp.addr, rp->kp.symbol_name, rp->kp.offset);
return tk ? (kprobe_on_func_entry(tk->rp.kp.addr,
ret = kprobe_on_func_entry(NULL, symbol, offset);