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invalid signal-context capability
by Stefan Thöni 19 Jul '22

19 Jul '22

Hello Genodians I'm debugging an "invalid signal-context capability" but I can't pinpoint the bug. From my understanding an "invalid signal-context capability" happens when the signal handler is destroyed before the signal is processed. I have therefore carefully looked at the lifetime of all signal handlers and their corresponding signals, refactoring code to allow signals to be processed before destroying signal handlers. Is there another condition that triggers an "invalid signal-context capability" besides destroying the signal handler before any corresponding signal is processed? Does anyone have any tips on how to find which signal handler caused an "invalid signal-context capability" or where the signal originated? Best regards Stefan -- Freundliche Grüsse Stefan Thöni Senior Security Architect +41 79 824 11 90 gapfruit AG Baarerstrasse 135 6300 Zug https://gapfruit.com

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Monitoring components for CPU/segmentation faults
by Duss Pirmin 18 Jul '22

18 Jul '22

Hello Genodians While searching for a solution to the problem of misbehaving components I stumbled upon `test-fault_detection` which gave me the idea to let init monitor the PD/CPU session of its children and report the error. The idea is that a monitor component can then decide what to do about the failure. I have drafted what I envision in [1]. It is not yet complete, as I'm not sure on how to safely remove the signal handlers if in a config change the monitoring is disabled. If you think this feature would be useful, I'd create an issue where the implementation details could be discussed. On the other hand maybe someone has an other idea how a similar functionality can be achieved. [1] https://github.com/trimpim/genode/tree/sandbox-fault_detection

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How to operate Genode on a machine without graphical output
by Jacek Rużyczka 12 Jul '22

12 Jul '22

Good evening, I am strongly interested to install the current Genode / SculptOS release on a server without graphical output, just with a serial terminal (VT100). As I haven't found this issue addressed in the official Genode docs, I'd like to ask here how to make Genode's UI, including the "Leitzentrale" on a 25×80 char device. Thank you. Regards Jacek Rużyczka

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terminal interface for tests
by genode.org＠netorderly.com 30 Jun '22

30 Jun '22

Hello, is it possible to launch and execute commands on a Genode VM completely through a Linux terminal? I tried qemu's '-nographic' option but it doesn't work. The reason I need this is because I want to make some changes to a compiler that has Genode support. I need to make some changes to the Genode specific code generation. I would like to do this as a test workflow on GitHub. Thanks!

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Reboot on ArmV8
by Shashank Anand 30 Jun '22

30 Jun '22

Hi Genodians, On x86, the acipica component enables shutdown and reboot of the device. I was however unable to find any related component in the genode repo for power management on ArmV8 The PSCI functions are a convenient way for power management in ArmV8. The base-hw kernel already provides a PSCI implementation of cpu_on and cpu_off and it is trivial to implement the other PSCI functions as well. I am particularly interested in system reset. I would like to perform a system reset from a user space component, however PSCI requires kernel privileges. Would it be possible to expose the PSCI system reset service to a specific component? How feasible is this modification with respect to the structure of base-hw? Regards, Shashank

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usage of new PC `platform_drv` and `pci_decode`
by Duss Pirmin 28 Jun '22

28 Jun '22

Hello Genodians While debugging https://github.com/genodelabs/genode/issues/4538, I'm having trouble using the new `platfomr_drv` for the PC platform. From the release notes of 22.05, it seems that the new component `pci_decode` should be used to create the list of PCI devices. Searching for this on master and staging I only find the component's source and its mention in the release notes - but not how it's used. I therefore extended my search. In the repository of skalk, I have found the branch `nvme_drv`, which adapts the NVMe driver for the new platform driver. When I execute the run-script from this branch on different platforms (x86_64 qemu, an Intel 8th gen up-xtreme and my Intel 11700), `pci_decode` doesn't report any PCI devices. Are there any further requirements to use the new platform driver on PC? Best regards Pirmin

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Compile error in Foundations book
by Guido Witmond 13 Jun '22

13 Jun '22

Hi Norman, I spotted a compile error in the Foundations book. Page 33 section void _handle_timeout() { log("woke up at ", _timer.elapsed_ms(), " ms"); } /home/user/genode/repos/lab/src/app/hello/main.cc:15:5: error: ‘log’ was not declared in this scope; did you mean ‘Genode::log’? I guess this is an oversight as it is the first example that's worth copy/paste and try out.. Cheers, Guido. PS. I've restarted my Genode experiments, this time with my APU4. I hope to turn it into a simple edge router for my home network... When it works I want to do a genodians blog on it.

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How to use virtio qemu nic?
by Alexander Tormasov 03 Jun '22

03 Jun '22

Good day! I want to compile my network http golang sample using the following command make -C build/arm_v8a/ KERNEL=hw BOARD=virt_qemu run/go_http Where I can find example of usage virtio nic for arm ? I try to use scrcpy sample for universal run file , and add something like below - but it fail: proc binary_nic_drv { } { if {[have_board linux]} { return "linux_nic_drv" } if {[have_board pc]} { return "ipxe_nic_drv" } if {[expr [have_board virt_qemu] && [have_spec arm_64]]} { return "virtio_mmio_nic" } if {[expr [have_board virt_qemu] && [have_spec x86_64]]} { return "virtio_pci_nic" } return "unknown_nic_drv" } … set depot_pkgs "[depot_user]/pkg/[drivers_nic_pkg]" lappend depot_pkgs [depot_user]/src/[binary_nic_drv] if [have_board linux] { lappend depot_pkgs [depot_user]/src/linux_rtc_drv } else { if [have_board pc] { lappend depot_pkgs [depot_user]/src/rtc_drv } else { lappend depot_pkgs [depot_user]/src/dummy_rtc_drv } } puts $depot_pkgs import_from_depot $depot_pkgs (Use binary_nic_drv in config) … lappend_if $use_nic boot_modules [binary_nic_drv] … build_boot_image $boot_modules append qemu_args " -m $mem_size -nographic -smp $num_cpu" append_qemu_nic_args "hostfwd=tcp::5555-:80" run_genode_until forever Fail: Library stdcxx Program test/go_http/go_http make[1]: Leaving directory '/var/services/homes/admin/gen/22.05/build/arm_v8a' genode build completed genodelabs/pkg/drivers_nic-virt_qemu genodelabs/src/virtio_mmio_nic genodelabs/src/dummy_rtc_drv Error: recipe for 'src/virtio_mmio_nic' not found - unable to guess version make: *** [Makefile:421: run/go_http] Error 1 make: Leaving directory '/var/services/homes/admin/gen/22.05/build/arm_v8a'

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Problem in 22.05 compilation of scrcpy from world
by Alexander Tormasov 03 Jun '22

03 Jun '22

Good day! After move to the version 22.05 I found 2 problems in scrcpy app (which I used as a sample for my own) 1. Incorrect fix of run file: --- /var/services/homes/admin/gen/22.05/repos/world/run/scrcpy.run 2022-06-03 12:27:27.438797613 +0300 +++ /var/services/homes/admin/gen/21.11/repos/world/run/scrcpy.run 2021-12-13 16:29:17.534528834 +0300 @@ -201,13 +201,16 @@ <affinity-space width="4"/> <parent-provides> <service name="ROM"/> + <service name="RAM"/> <service name="IRQ"/> <service name="IO_MEM"/> <service name="IO_PORT"/> + <service name="CAP"/> <service name="PD"/> <service name="RM"/> <service name="CPU"/> <service name="LOG"/> + <service name="SIGNAL"/>} append_if $use_trace config { <service name="TRACE"/>} Pay attention that you remove accidentally } 1. After fix of the above I found another problem: Library base Program drivers/nic/virtio/spec/x86/virtio_pci_nic make[1]: Leaving directory '/var/services/homes/admin/gen/22.05/build/x86_64' genode build completed checking configuration syntax CHECK init CHECK init -> nic_router using 'core-nova.a' as 'core.a' error copying "bin/ipxe_nic_drv": no such file or directory while executing "file copy -force $src $dst" (procedure "copy_file" line 2) invoked from within "copy_file bin/[kernel_specific_binary $binary] [run_dir]/genode/$binary" (procedure "copy_genode_binaries_to_run_dir" line 4) invoked from within "copy_genode_binaries_to_run_dir $modules" (procedure "build_core_image" line 12) invoked from within "build_core_image $binaries" (procedure "run_boot_dir" line 26) invoked from within "run_boot_dir $binaries" (procedure "build_boot_image" line 35) invoked from within "build_boot_image $boot_modules" (file "/var/services/homes/admin/gen/22.05/repos/world/run/scrcpy.run" line 584) invoked from within "source $include_name" ("foreach" body line 6) invoked from within "foreach include_name [get_cmd_arg --include ""] { # first check if the include name is absolute if {[string first "/" $include_name] == 0} { puts ..." (file "/var/services/homes/admin/gen/22.05/tool/run/run" line 1155) make: *** [Makefile:421: run/scrcpy] Error 1 make: Leaving directory '/var/services/homes/admin/gen/22.05/build/x86_64' Any idea how to fix?

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Announcement: Genode OS Framework version 22.05 released
by Christian Helmuth 31 May '22

31 May '22

A fresh release was just released and covers several challenging topics while accomplishing the goals set forth in our roadmap. The most prominent new feature is the support for WireGuard virtual private networks in a dedicated native Genode component. Thereby, easy-to-use state-of-the-art network security becomes available to Genode/Sculpt OS users. Further, we finished our update of PC device drivers to Linux 5.14.21. This includes Intel graphics support up to Gen12 as well as Intel Wi-Fi for 802.11ax. Also, Genode attains the principle ability for voice calls on the PinePhone. Last but not least, the release comes with a revised tracing framework incl. Sculpt OS support and dynamic FPGA device management on Xilinx Zynq paving the way to runtime hardware reconfiguration by a snap of your fingers ;-) The topics of the current release are: - New WireGuard VPN component - New generation of DDE-Linux-based PC drivers - Feature-complete USB host-controller driver - Intel wireless stack with support for 802.11ax - Intel display driver supporting generations 11 and 12 - Modernized platform driver for PC hardware - Dynamic device management and SD-card support on Xilinx Zynq - PinePhone with custom SCP firmware and basic telephony - New revisions of Genode Foundations and Platforms documents - Improved usability of light-weight event tracing The complete release documentation can be found at the usual place https://genode.org/documentation/release-notes/22.05 Happy hacking -- Christian Helmuth Genode Labs https://www.genode-labs.com/ · https://genode.org/ https://twitter.com/GenodeLabs · https://genodians.org/ Genode Labs GmbH · Amtsgericht Dresden · HRB 28424 · Sitz Dresden Geschäftsführer: Dr.-Ing. Norman Feske, Christian Helmuth

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