ashmem

i'm trying to share memory between android and chrooted ubuntu, I know I can mount bind /dev/ashmem to the ubuntu side , and i have tried out sockets between android and ubuntu and it works . Now the question is how do i pass the fd from android to ubuntu side?

will simply passing the the fd and then mmaping work? ( i think not, but haven't tried it )

or will i need to extend something in ashmem driver ( user / kernel side) to do that? If someone has already done / knows something abt this can you give me a starting point?