users July 2010

users@lists.genode.org

5 participants
6 discussions

Further questions
by Peter Nguyen 30 Mar '12

30 Mar '12

Hi, Thanks you very much for that. I now have it running. I have another question about Genode. More specifically, I was wondering whether any of the Iguana services at all. I ask this given that the weaver.xml file refers to memsections and pds (i'm assuming that means protection domains). Peter ----- Forwarded message from Norman Feske <norman.feske@...1...> ----- Date: Tue, 05 Jan 2010 08:43:36 +0100 From: Norman Feske <norman.feske@...1...> Reply-To: Genode OS Framework Mailing List <genode-main(a)lists.sourceforge.net> Subject: Re: Broken assertion To: Genode OS Framework Mailing List <genode-main(a)lists.sourceforge.net> Hi Peter, this is a different error as the one mentioned in the Wiki. It actually tells you what's wrong. ;-) In the 'weaver.xml' file, there is a memsection referring to a file called 'config'. This is the configuration file of Genode's init process. You can use a copy of the template provided at 'os/config/demo'. You can either specify this file as filename for the 'config' module entry in 'weaver.xml' or copy it to your '<builddir>/bin/' directory (and of course rename it to 'config'). This bit was missing in the Wiki. So I added it to the Wiki page. Thank you for pointing it out. Norman Peter Nguyen wrote: > Hi, > > In the wiki describing how to build Genode on OKL4, does the bug alert refer to > following message: An error occurred: [Errno 2] No such file or directory: > 'config'? > > I've followed the build instructions, and i've changed the value as suggested as > the quick fix, but I still get this error. > > As usual, any help would be greatly appreciated. > > Peter ------------------------------------------------------------------------------ This SF.Net email is sponsored by the Verizon Developer Community Take advantage of Verizon's best-in-class app development support A streamlined, 14 day to market process makes app distribution fast and easy Join now and get one step closer to millions of Verizon customers http://p.sf.net/sfu/verizon-dev2dev _______________________________________________ Genode-main mailing list Genode-main(a)lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/genode-main ----- End forwarded message -----

3 4

Second anniversary of the Genode OS Framework
by Norman Feske 10 Aug '10

10 Aug '10

Hi there, the upcoming version 10.08 of the Genode OS Framework will be the 8th release since the initial publication two years ago in August 2008. We invite you to celebrate its second anniversary together with us. As last year, we will gather for a barbecue and a campfire at the river Elbe in Dresden on 12th of August, 6 pm near Moritzburger Str. 1 in Dresden Check out the map for finding the location: http://maps.google.de/maps/ms?ie=UTF8&msa=0&msid=103318122554571178078.0004… We'd be happy about you joining us. We will provide beverages and barbecue both vegetarian and non-vegetarian. If you plan to attend, please send a short note to info@...1... Cheers Norman -- Dr.-Ing. Norman Feske Genode Labs http://www.genode-labs.com · http://genode.org Genode Labs GmbH · Amtsgericht Dresden · HRB 28424 · Sitz Dresden Geschäftsführer: Dr.-Ing. Norman Feske, Christian Helmuth

1 1

LWIP
by Peter Nguyen 22 Jul '10

22 Jul '10

Hi, I've noticed that when connecting to the test web server via TAP, connections seem to be a bit slow. I've added some test code to "download" some data on the web server, and at most, i'm only getting around 1.5K/s (using wget). Is there something i can do to improve the connection speed, or am I basically stuck with this? Peter

3 2

pthread_create
by stephane frenot 13 Jul '10

13 Jul '10

Hello the list, I am newbie to the genode framework. I am using the x86_64 port for linux with libc repository. I am trying to integrate legacy application that use calls such as pthread_create. The call does not exist, and I wonder which solution is the best. Do I need to wrap all thread creation through genode thread service call ? /stephane -- http://perso.citi.insa-lyon.fr/sfrenot work here : http://tinyurl.com/2ts4xf sleep here : http://tinyurl.com/33p2gt play here : http://tinyurl.com/3yarjz --- Stephane Frenot Université de Lyon, INRIA INSA-Lyon, CITI, F-69621, France

2 1

About Genode::Signal reception
by Frank Kaiser 06 Jul '10

06 Jul '10

Hello I want to use the Genode signalling scheme to control asynchrones data exchange between a client and a server. To get familiar with it I started with a test implementation on the server side. The server's main function fills some data into a buffer and instantiates a Signal receiver thread which shall dump the buffer content on signal reception. Then it instantiates a Signal transmitter to fire a signal at the receiver for one time. The unexpected outcome is that it looks as if the receiver gets the signal twice. This is the implementation in main(): Signal_receiver s_rcvr; Signal_context ct; Receiver *ser_rx = new (env()->heap()) Receiver(s_rcvr, srv.transmit); Signal_context_capability send_cap = s_rcvr.manage(&ct); Signal_transmitter tx(send_cap); tx.submit(); The receiver thread's entry() function (class Receiver derived from class Thread<>; the constructor's 2nd parameter is a handle to the buffer already filled with data, which is accessed thru _transmit inside the function): void entry() { uint8_t ch[32]; int cnt = 0; while (1) { Signal signal = _receiver.wait_for_signal(); #if 1 for (unsigned out = 0; out < sizeof(ch); ++out) { int rd = _transmit.read_byte(); if (rd >= 0) ch[out] = uint8_t(rd); else break; } ++cnt; ch[31] = '\0'; printf("Found characters: %s\n", &ch[0]); ch[0] = '\0'; printf("Caught signals: %d\n", cnt); #endif } } The debug output shows that the 2 printf()s inside the while() loop are called 2 times, which clearly indicates that _receiver.wait_for_signal() returned 2 times. I wonder what goes wrong, and what I should do to get rid of this odd behaviour. Regards Frank

2 3

Constructing objects from dataspaces
by Frank Kaiser 05 Jul '10

05 Jul '10

Hello I recently stumbled over a missing placement new operator in the Genode framework. I needed an object to be shared between a client and a server. The server should construct the object. The client should connect to the server, and in response receive a capability allowing the client to access the data held by the object. The class defining the object provides a constructor to do some necessary initialisation of the object. It looks like this: class Object { ... Object(...) : ... { ... } }; The chosen approach is to create a dataspace capability with the size of the object. On the server side the object is instantiated: Dataspace_capability cap = env()->ram_session()->alloc(sizeof(Object)); Object *obj = static_cast<Object *>(env()->rm_session()->attach(cap)); However, this does not work as expected, since this way Object's constructor is never called. To achieve this applying the new operator is required: Dataspace_capability cap = env()->ram_session()->alloc(sizeof(Object)); Object *obj = new(env()->rm_session()->attach(cap)) Object(); However, this does not work either, because it leads to a type error with the placement parameter. The reason is that the only publicly available placement new operator is: void *operator new(Genode::size_t size, Genode::Allocator *allocator) And worse, its implementation tries to effectively allocate the object's space, something which is not wanted in the given context. What is needed here is a new operator which just returns the placement parameter as the address of the object so that its constructor is invoked when applying the operator. Something like this: void *operator new(Genode::size_t size, void *addr) { return addr; } I found such an operator locally defined in some Genode source files (allocator_avl.cc for instance). I wonder why such an operator is not publicly available although its usefulness is obvious. For the time being I created a local inplementation for my purpose by cloning it from an exisiting one. It would be helpful to have it generally thru a system include file. Regards Frank

2 1

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

users July 2010