What's '-X' argument used for in sel_ldr ?

[KnoooW]

hi all,

  I know -h can be used to redirect descriptors. but, the '-X' have confused me serveral days.

After reading some source code, I know it was called  'export-addr-to' used for  'secure command channel'.

as the secure channel source code part is much hard to understand. I wonder, 

1) What's the '-X' used for ? What's its design purpose ?

2) How to use it to communicate ?

btw: I used sel_ldr loader in LINUX ONLY. NOT in browser.

Thanks !

[KnoooW]

在 2015年8月18日星期二 UTC+8上午10:17:41，KnoooW写道：

 After reading some source code, I realize that secure command channel is used for host process to communicate with service_runtime in nacl by SRPC !

 is that right ?

 anybody ?