[Sangfor-WANACC9.5.8 B]$ cat /proc/6971/stack
    [] wait_rcu_gp+0x50/0x60
    [] synchronize_sched+0x29/0x30
    [] ioctrl_get_rt_flux+0x373/0x410 [sfvpn]
    [] do_vfs_ioctl+0x78/0x370
    [] sys_ioctl+0xa1/0xb0
    [] system_call_fastpath+0x16/0x1b
    [] 0xffffffffffffffff
    [Sangfor-WANACC9.5.8 B]$ nm /app/modules/sfvpn.ko | grep ioctrl_get_rt_flux
    0000000000035c90 t ioctrl_get_rt_flux
    [Sangfor-WANACC9.5.8 B]$ printf “%x\n” $((0x35c90 + 0x373))
    36003
    [Sangfor-WANACC9.5.8 B]$ addr2line -e /app/modules/sfvpn.ko 0x36003
    /tmp/tmp.JDBugfRDy7/sfvpn-linux/../libsfvpn-dp/src/sfvpn-flux.c:215


    arm需要使用交叉编译工具：
    aarxxxxxxx-addr2line -e xxxx.ko 0x36003