Problem with setting up namespaces

Christian Ehrhardt ehrhardt at
Thu Jul 18 16:06:56 CEST 2013


On Wed, Jul 17, 2013 at 10:08:14PM +0200, Johannes Schlatow wrote:
> I was just trying to set up a simple application that uses L4Re namespaces.
> I therefore took the clntsrv example and modified it as shown in the
> diff below with
> the result that the server blocks on the bind_thread() call. Am I
> missing something?
> Cheers
>  Johannes
> diff --git a/src/l4/pkg/examples/clntsrv/clntsrv.cfg b/src/l4/pkg/examples/clntsrv/clntsrv.cfg
> index bb2ae50..dd7dfa5 100644
> --- a/src/l4/pkg/examples/clntsrv/clntsrv.cfg
> +++ b/src/l4/pkg/examples/clntsrv/clntsrv.cfg
> @@ -9,13 +9,16 @@ local ld = L4.default_loader;
>  -- Channel for the two programs to talk to each other.
>  local calc_server = ld:new_channel();
> +local server_ns   = ld:create_namespace({ calc_server = calc_server:svr()});
> +local client_ns   = ld:create_namespace({ calc_server = calc_server});

It's been a while since I tried to do something like this but IIRC
an IPC-Gate Capability is automatically downgraded when you put it into
a namespace. I.e. cal_server:svr() will not work and instead but the
client side of the IPC-gate into the namespace.

Whether this is intential or not, I don't know.

     regards    Christian

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 198 bytes
Desc: Digital signature
URL: <>

More information about the l4-hackers mailing list