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2349 discussions

Debugging Genode applications on Ubuntu 14.04 64bit
by Menno Valkema 11 Dec '15

11 Dec '15

Hi Everyone, While developing applications for Genode I sometimes run into bugs and issues where a debugger would be of great help to figure out what I'm doing wrong. Reading Genode Foundations section 4.7.2 the GDB monitor approach seems to be exactly what I'm looking for. So when I try the gdb_monitor build-process as described at http://genode.org/documentation/developer-resources/gdb I get the following error message: $ make app/gdb_monitor checking library dependencies... Library-description file gdbserver_platform.mk is missing Digging a little deeper it seems I do have this file, however it's not available for my platform (Ubuntu Linux 14.04 64bit). Searching the web for this issue I find a post from May 2014 (http://sourceforge.net/p/genode/mailman/message/32372505/) which seems to be the issue I'm running into. The proposed solution is to use 32bit Linux. What I could do is setup a VM with 32bit Linux and do my debugging here. However I prefer doing my debugging at my workstation natively without switching to a VM whenever I run into an issue. So I wondered whether there is any way to do my gdb debugging on a 64bit workstation. Did I miss a source which explains how to do things on a 64bit system? Is a gdb_monitor for 64bit Linux on it's way? Would there be any way to use the gdb-monitor for 32bit Linux on my 64bit system? Is there another system in place for 64bit debugging? Any help would be appreciated. Kind regards, Menno

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i.mx53qsb and ARM Trustzone Techology
by Joseph Lee 10 Dec '15

10 Dec '15

Hi >From the article in this link http://genode.org/documentation/articles/trustzone , I understood that the DDR RAM in i.mx53 QSB is partitioned off between normal world and secure world. I just want to read a file in the normal world from application running in the secure side. Is there any possibility to get access to any file in normal world from the secure world? thanks for your help in advance. Regards, Joseph

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ARM TrustZone Shared Memory Crossworld
by Stefan Brenner 10 Dec '15

10 Dec '15

Hi, currently we're working with the TrustZone VMM example from Genode based on Genode 15.05 on i.MX53 QSB. We have a shared buffer in normal world, which we want to use for cross-world communication. Currently the buffer is allocated using mmap MAP_SHARED | MAP_ANON. We're having strange issues/problems/inconsistencies when accessing the memory range in Genode (secure world) after normal world has written to it. We read that uncached memory should be used for this, or the cache lines have to be flushed/invalidated. However, apparently we can't get either of these options working. So our questions as follows: 1) We use mmap(NULL, <size>, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_ANON, -1, 0) to allocate the buffer in normal world (Linux). Is there a better way to allocate uncached memory? 2) We've tried __cpuc_flush_user_all(), __cpuc_flush_kern_all() in order to invalidate all cache lines (later maybe only the affected cache lines once this works in general). Is this correct, to do this in normal world (i.e. Linux)? 3) At the moment we assume that Genode doesn't have to invalidate/flush its cache lines because as it is the VMM it should be aware of the fact that the cache might be stale. Any help is appreciated. A short hint: Currently our idea is to send an hypercall to the Genode VMM after Linux has written to the buffer, so Genode will pretty quickly access the memory after it has been written to from Linux. Best regards, Stefan. -- M.Sc. Stefan Brenner Institute of Operating Systems and Computer Networks Distributed Systems Group TU Braunschweig www: https://www.ibr.cs.tu-bs.de/users/brenner mail: brenner@...290...

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Turmvilla Memory
by Harm de Vries 09 Dec '15

09 Dec '15

Hello all, Today I tried to run the latest Turmvilla configuration on a Lenovo X250 laptop (Nova 64bit kernel). However, although the machine has 16GB of of memory only 1942MB is transferred to init, see the log below. Does anyone have an idea what could cause this behaviour? Block: [02800000,10000000) size=0d800000 avail=0d800000 max_avail=6bbcd000 Block: [1000b000,7bbd8000) size=6bbcd000 avail=6bbcd000 max_avail=6bbcd000 => mem_size=2037813248 (1943 MB) / mem_avail=2037202944 (1942 MB) :io_mem_alloc: Allocator 18fcb8 dump: Block: [00000000,00001000) size=00001000 avail=00001000 max_avail=00001000 Block: [0009d000,00100000) size=00063000 avail=00063000 max_avail=00063000 Block: [10000000,1000b000) size=0000b000 avail=0000b000 max_avail=fffffffbd1fff000 Block: [bf01f000,100000000) size=40fe1000 avail=40fe1000 max_avail=fffffffbd1fff000 Block: [42e000000,fffffffffffff000) size=fffffffbd1fff000 avail=fffffffbd1fff000 max_avail=fffffffbd1fff000 => mem_size=18446744056848773120 (17592186028336 MB) / mem_avail=18446744056848773120 (17592186028336 MB) Genode 15.08-241-g656aa4a <local changes> int main(): --- create local services --- int main(): --- start init --- int main(): transferred 1942 MB to init When I tried to build the configuration on a different machine the following error occurred while trying to prepare the Nova kernel. $ make prepare nova download https://github.com/alex-ab/NOVA.git Cloning into 'src/kernel/nova'... remote: Counting objects: 4810, done. remote: Compressing objects: 100% (79/79), done. remote: Total 4810 (delta 53), reused 0 (delta 0), pack-reused 4731 Receiving objects: 100% (4810/4810), 5.99 MiB | 3.55 MiB/s, done. Resolving deltas: 100% (3517/3517), done. Checking connectivity... done. nova update src/kernel/nova fatal: reference is not a tree: 92a2b58a5860916dbf89f7b0289fe7862abaf728 make[2]: *** [nova.git] Error 128 make[1]: *** [_install_in_port_dir] Error 2 make: *** [prepare] Error 2 Again, does anyone know what causes this? Kind regards, Harm

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Article about the new TrustZone demo on the USB Armory
by Martin Stein 09 Dec '15

09 Dec '15

Hello everyone, as already announced, Genode's recent release 15.11 contains enhanced TrustZone support on the USB Armory board using our custom base-hw kernel. Due to the many-sided and perceptive story behind this improvement, we decided to provide a dedicated article. Besides telling our story, the article also illustrates how the new TrustZone demo on the USB Armory works and how you can easily bring it to your own USB Armory. If you are interested in this topic, you may read the article at: http://genode.org/documentation/articles/usb_armory I hope you enjoy it and may even find it helpful.

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Qt 5.5 basic support
by Reinier Millo Sánchez 08 Dec '15

08 Dec '15

Hi Genode Comunity We want to share our basic support of QT 5.5 on GenodeOS. The on going development is in our GenodeOS fork at Github: https://github.com/xeos-team/genode/tree/qt5_5 We worked to support the basic elements of Qt, based on the support of Qt 5.1. This work is not finished yet, but it can be used by the community. Based on the support of Qt 5.1 we have reorganized a bit the Qt modules, acording the modules on Qt 5.5. This is the list of the components supported and a list of examples of Qt that we have tested on GenodeOS: * Qt Core o qt5_core_contiguouscache.run o qt5_core_savegame.run o qt5_core_semaphores.run o qt5_core_waitconditions.run * Qt Gui o qt5_gui_analogclock.run o qt5_gui_openglwindow.run o qt5_gui_rasterwindow.run * Qt Widgets o qt5_widgets_animatedtiles.run o qt5_widgets_appchooser.run o qt5_widgets_calculator.run o qt5_widgets_chart.run o qt5_widgets_digitalclock.run o qt5_widgets_dynamiclayouts.run o qt5_widgets_elasticnodes.run o qt5_widgets_lighting.run o qt5_widgets_mainwindow.run o qt5_widgets_moveblocks.run o qt5_widgets_pathstroke.run o qt5_widgets_puzzle.run o qt5_widgets_sliders.run o qt5_widgets_standarddialogs.run o qt5_widgets_stickman.run o qt5_widgets_tetrix.run o qt5_widgets_textedit.run o qt5_widgets_trafficlight.run o qt5_widgets_undo.run * Qt Network o qt5_network_dnslookup.run o qt5_network_fortuneserver.run o qt5_network_threadedfortuneserver.run o * Qt Websockets o qt5_websockets_echoserver.run o qt5_websockets_simplechat.run * Qt Xml o qt5_xml_dombookmarks.run o qt5_xml_htmlinfo.run o qt5_xml_xmlstreamlint.run At this point we are having some troubles in the support. In some examples, we are getting this message when the Qt application finished Genode::Signal_session_component::submit(Genode::Signal_context_capability, unsigned int)::<lambda(Genode::Signal_context_component*)>: invalid signal-context capability On the XML module, there is a little problem, I think that Qt isn't recognizing the EOF in the XMLs files. Have tested it and it parse the XML file but fails at EOF. I'm reviewing this trying to fix it on Qt or the libc integration with Qt. The UDP sockets are not working on GenodeOS yet. We are planning continue working on the other Qt modules. If someone have any suggestion to our support problems, or is interested to help us in the support of Qt 5.5 is welcome. Best regards -- Lic. Reinier Millo SÃ¡nchez Centro de Estudios de InformÃ¡tica Universidad Central "Marta Abreu" de Las Villas Carretera a CamajuanÃ Km 5 1/2 Santa Clara, Villa Clara, Cuba CP 54830 "antes de discutir ... respira; antes de hablar ... escucha; antes de escribir ... piensa; antes de herir ... siente; antes de rendirte ... intenta; antes de morir ... vive"

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Noux application
by Joseph Lee 07 Dec '15

07 Dec '15

Hi everyone, I am running a simple "tz_vmm" example in Genode on imx53 qsb. I have Noux application which runs on top of Noux runtime inside the secure world. I wanted to access this Noux applications inside tz_vmm application, calling a function of Noux application from tz_vmm code. But i have no idea how to do that. Could anyone please give me some hint? Thanks and best regards, Joseph

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FOSDEM 2016 microkernel devroom - submission deadline
by Norman Feske 07 Dec '15

07 Dec '15

Hello everyone, hereby, I'd like to give the reminder that the deadline for contributions to the microkernel developer room at FOSDEM 2016 is approaching. According to Jakub's request for participation, the developer room is open for submissions until December 13: https://lists.fosdem.org/pipermail/fosdem/2015-October/002191.html Personally, I have submitted a talk about my ongoing line of work with bringing seL4 and Genode together. Maybe you have an interesting story to tell about your work, topics for discussions, or a demo? If so, I encourage you to participate in the microkernel developer room! 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

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Reminder: Microkernel-devroom CfP deadline is on this Sunday
by Jakub Jermar 07 Dec '15

07 Dec '15

Hi folks, the CfP deadline for the Microkernel devroom at FOSDEM 2016 is due this Sunday. See the original CfP [1] for information on what to do if you would like to give a talk about some microkernel-related topic. At the same time, I would like to encourage you to submit a talk proposal. It would be shame not to let the wider microkernel community know about the latest and greatest developments in your project. Lastly, please forward this reminder to whoever you think may want to give a talk in the devroom and is not among the recipients of this message. Thanks, Jakub [1] http://trac.helenos.org/wiki/Devroom2016

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memory dump
by Abhay Amala 05 Dec '15

05 Dec '15

Hi everyone, I am running tz_vmm on imx53qsb and thinking about taking a snapshot of the normal world memory inside the tz_vmm app and put into a file as a raw data. I appreciate if anyone give me a hint. Thanks and best regards, Abhay

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