Hi Norman,
> just a shot in the dark: Have you called 'Rpc_entrypoint::manage(ds)' > for your dataspace object? Or to put the question differently: Is the > dataspace capability that you return in > 'Io_mem_session_component::dataspace()' valid inside core? If not, you > have most likely missed to associate your 'Dataspace_component' object > with core's entrypoint. I had this issue already in the first email where I tried to do exaclty this. I read through it again and my explanation wasn't clear. When I add > _ds_cap = _ds_ep->manage(&_ds); It fails to build with > In file included from > /.../genode/repos/base/include/dataspace/capability.h:17:0, > from /.../genode/repos/base/include/dataspace/client.h:17, > from > /.../genode/repos/base-linux/src/include/linux_dataspace/client.h:17, > from > /.../genode/repos/base-linux/src/core/io_mem_session_component.cc:15: > /.../genode/repos/base/include/base/capability.h: In instantiation of > ‘Genode::Untyped_capability Genode::Capability< <template-parameter-1-1> > >::_check_compatibility(const Genode::Capability<FROM_RPC_INTERFACE>&) const > [with FROM_RPC_INTERFACE = Genode::Linux_dataspace; RPC_INTERFACE = > Genode::Io_mem_dataspace; Genode::Untyped_capability = > Genode::Native_capability]’: > /.../genode/repos/base/include/base/capability.h:153:49: required from > ‘Genode::Capability< <template-parameter-1-1> >::Capability(const > Genode::Capability<FROM_RPC_INTERFACE>&) [with FROM_RPC_INTERFACE = > Genode::Linux_dataspace; RPC_INTERFACE = Genode::Io_mem_dataspace]’ > /.../genode/repos/base-linux/src/core/io_mem_session_component.cc:72:34: > required from here > /.../genode/repos/base/include/base/capability.h:134:24: error: cannot > convert ‘Genode::Linux_dataspace*’ to ‘Genode::Io_mem_dataspace*’ in > initialization > RPC_INTERFACE *to = from; I tried to circumvent this by trying different casts but I could not find an appropriate solution (fooling the compiler with typedefs is not one). When you said that opening the file and adding the file descriptor was enough I misinterpret that I don't need to call manage. > Could you point me to a branch where I can have look at the code and > reproduce the problem? I have a state on [1] that contains a test `run/io_mem` which tests that behaviour. I also have added a check to [2] so `attach` does not segfault but throws an `Invalid_dataspace` exception. In io_mem_session_component.cc I have already added (but commented out) the line to call manage which does not build yet. Thanks for your help and regards, Johannes [1]: https://github.com/jklmnn/genode/tree/ac59709d4af406125454180e5453f30184505a8d [2]: https://github.com/jklmnn/genode/blob/ac59709d4af406125454180e5453f30184505a8d/repos/base-linux/src/lib/base/region_map_mmap.cc#L190 [3]: https://github.com/jklmnn/genode/blob/ac59709d4af406125454180e5453f30184505a8d/repos/base-linux/src/core/io_mem_session_component.cc#L72 ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ genode-main mailing list genode-main@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/genode-main
