users

users@lists.genode.org

3 participants
2349 discussions

Libcrypto in Genode
by Vincent Raes 21 Apr '15

21 Apr '15

Hi, I have been doing some work using cryptography in Genode with the libcrypto library from OpenSSL and I'm encountering some errors that seem curious to me. If I use everything related with openssl in the Main of a program, eg public key, private key, etc... The following warning pop up when I start the main: Could not open file "config" Could not obtain config file no VFS configured There are pretty obvious since I simply didn't configure a VFS or made a config file for openssl. It hasn't really given me any problems yet. I get these errors when I go for the first encryption: no plugin found for fcntl(2) no plugin found for write(2) plugin()->open("") failed The first 2 are probably since libc can't find those 2 plugins. I have no idea what the third error is nor do I know how libc can find the plugins. >From what I found in the mailing list I assume I should configure a VFS but I'm not sure. Again, execution goes on after this, no real problems. And once all is done failed to submit signal context virtual void Genode::Rm_session_component::detach(Genode::Rm_session::Local_addr): no attachment at 1ff000 No idea why this is happening. but it's also not really giving any problems. The programs exits nicely after this. The problems appear when I try to use cryptography in a thread. Everything works fine before I start the thread, eg. during the constructor of the thread, but once the start function of the thread is called, I get the following error when I try to encrypt any data: init -> crypto_test -> crypto: unresolved pagefault at ip=5e6dc core -> pager_activation: cannot submit unknown signal context 0 And then execution stops. The main reason I don't understand why this is happening is since it does seem to work when used in a main. Could this have something to do with the plugins that can't be found? Seems unlikely to me. What seems more likely is that it's related to the use of the c library in a thread or to the final warning I get when executing it in a main but as I said, no idea why this's happening or what to do about it. Any input as to why this is happening or even better how to fix it, would be much appreciated. Best regards, Vincent

1 0

Adding a Kernel Module in base-hw
by Franc sylvester 21 Apr '15

21 Apr '15

Hello everyone, I am stuck at one point because of lack of understanding in Genode, Actually I want to execute some assembly instruction in privileged mode in base-hw kernel from a user script. So I need to know, How will I add a kernel module which will execute assembly instruction and how can I call this module from the user space. And if there is already any such modules exist in Genode that will really help me to understand the flow mechanism, Let me know. Cheers Franc

4 11

TrustZone Support on TI AM335x Sitara Starter Kit
by Rolf Sommerhalder 15 Apr '15

15 Apr '15

Dear list, With a specific project in mind that requires two 1 GE network interfaces to essentially bridge Ethernet traffic, I am tempted to order a TMDSSK3358 - AM335x Starter Kit for development [1], and eventually later move to the Little Universal Network Appliance (LUNA) [2, 3]. For 200 USD/Euro (even in Switzerland), this kit seems to be pretty good value, considering that it includes a 720 MHz AM3358, dual Gigabit Ethernet interfaces, and also provides JTAG to USB as well as UART to USB converters on-board (no need for JTAG Debug or serial adaptors), besides a touch-screen LCD. What still holds me back is somewhat conflicting information from TI about TrustZone support in their AM335x Sitara family, and no word about TZ support by their Starter Kit. After doing some in-depth research, my current understanding is that TI Sitara have TZ support inherently baked in being ARM v7 Cortex-A8 processors. However, they boot into "normal mode" with no way to get back into "secure mode" [4]. Unless I could convince TI to let me sign a NDA in order to get access to documentation (eventually blow on-chip fuses, and keys to sign my OS/app?) which might let my code boot/run in "secure mode" with the TMDSSK3358 [5, 6]. Has anyone experience with TrustZone support on AM335x, and can confirm my understanding, or provide additional pointers? Alternatively, can you recommend other ARM dev boards with dual NICs (not via USB!), TrustZone support like the Freescale i.MX53 ARM Cortexâ¢-A8 that is on the USB Armory, and which is "affordable"? Thank you, Rolf [1] http://www.ti.com/tool/tmdssk3358 [2] https://www.kickstarter.com/projects/wawtechnologies/luna-little-universal-… [3] http://wawtechnologies.myshopify.com/pages/product [4] http://stackoverflow.com/questions/7955982/arm-trustzone-development/802894… [5] http://e2e.ti.com/support/arm/sitara_arm/f/791/p/350149/1226519 [6] http://e2e.ti.com/support/arm/sitara_arm/f/791/p/415956/1478453

2 1

Tracing server
by Duss Pirmin 15 Apr '15

15 Apr '15

Hello I'm building a trace tool that is able to send the traces over a terminal connection. For this I would like to create a Server sleeps until a new trace is available. Is this possible or should I adapt the main loop of the trace example? Best regards Pirmin

2 1

Data Abort MMU exception on mapped IO register read
by Bob Stewart 14 Apr '15

14 Apr '15

Hi, I'm running with 15.02, base-hw on a TI AM3359 processor. I've successfully created device drivers for most of the devices on the peripheral bus without issue. Accessing the the final device i need a driver for, is causing me fits. I attached the IO device register space with the usual creation of a Attached_io_mem_dataspace based object which also uses the very useful MMIO utility object. I also tried it without MMIO and just accessed the space through local_addr<void>. When I try to read an address in the mapped space I get an "unknown MMU exception". When I write to the same address no error occurs (I'm assuming for now it's failing silently). Putting PDBG's in the arm thread code shows that the error on the read is is being caused by a DATAT_ABORT. Peeking at the data fault status register (dfsr) shows 0x805 which according the the the ARM7 technical reference manual decodes to a translation table error. The virtual address created when the io device is mapped is 0x81B0_0000 (the load_addr<void>), but I see no section table entry being created for 0x8100_0000. Only one is created at 0x8000_0000. If I'm remembering correctly sections are 16 MB is size for this architecture. I'm instrumenting short_translation_table.h to see what translation table entries are being created. I also don't seen any short translation table entries being created in the 0x81bxx_xxxx region. My platform support code does include the physical address and size for the region containing the device I'm trying to access. The only physical difference with this device and the others I've successfully created drivers for, is that is runs of the L4 interconnection whereas the others were on the L3 interconnect. In this SoC the L4 is bridged to the L3 interconnect and runs at half the speed of the L3 bus. But I doubt that this would make any difference to the mapping of the device. This device is also much higher in memory that the other devices. Any hints at further debugging of this issue would be greatly appreciated. Thanks, Bob Stewart

5 9

Fwd: IOMUX in tz_vmm
by chirag garg 14 Apr '15

14 Apr '15

Hi all, I am trying to set 0 and 1 bit in Gpr9 register in IOMUX for imx6 but when i am running my example on the board it stops as tz_vmm start at the point of iomux initialization. Iomux implementation present at https://github.com/chiragdthinker/genode/blob/hw_sabrelite_tz_support/repos… and in main at line no 54 and 128 https://github.com/chiragdthinker/genode/blob/hw_sabrelite_tz_support/repos… What could be the reason of this failure.? Without initialization of iomux this example works fine. Thanks in advance. Regards Chirag Garg IIT Madras , Rise Lab

2 1

Re: ldso problem on zynq
by Mark Albers 10 Apr '15

10 Apr '15

Hi, I'm working with Genode on zynq hardware together with Johannes. I just tested 'make run/ldso' with try/catch statement commented out. Here's the result: Genode 14.11 int main(): --- create local services --- int main(): --- start init --- int main(): transferred 1020 MB to init int main(): --- init created, waiting for exit condition --- [init -> test-ldso] C++ runtime: Genode::Rm_session::Region_conflict [init -> test-ldso] void* abort(): abort called Regards Mark

2 2

ldso problem on zynq
by Johannes Schlatow 10 Apr '15

10 Apr '15

Hi, as previously mentioned, I'm running Genode on Zynq-based hardware...which is progressing quite well by the way ;-) Unfortunately, I got stuck at using the dynamic linker, i.e. 'make run/ldso' fails with the following output: > Genode 14.11-93-ge5ef216 > int main(): --- create local services --- > int main(): --- start init --- > int main(): transferred 1020 MB to init > int main(): --- init created, waiting for exit condition --- > [init -> test-ldso] LD: Failed to load program > [init] virtual void Genode::Child_policy::exit(int): child "test-ldso" exited with exit value -1 As I'm quite unfamiliar with dynamic linking in general, I have no clue what's wrong here. Also, having a quick look at the corresponding lines in the ldso didn't shed much light on this matter. Thus, I'd be very glad to get a few hints from you guys. Any ideas what I need to check to narrow this down? If you are interested in the zynq-related code, you can find it at: https://github.com/ValiValpas/genode/tree/zynq Cheers Johannes

2 2

RE:Re: how to get the value of REV？
by Lee gary 08 Apr '15

08 Apr '15

Hi Stefan, I follow your guideline to get the REV.but when i prepare_port the port file. It report errors that fatal: reference is not a tree: 6241b87eb37b9cfe7b063f0054732bf2c7686202 how can i to solve it? thanks 2015-03-29 20:46 GMT+08:00 Lee gary <11430erwin@...9...>: > Hi all. > I know the REV(git) in the port file is hash of the current > version.but i don't know how to get the value of REV？ > > Thanks >

2 1

TrustZone: Access in Normal world
by chirag garg 07 Apr '15

07 Apr '15

Hi all I am running Genode 15.02 over the I.MX6 board. I tried to run tz_vmm script to run another Genode kernel image in normal world which running successfully. Also, I am able to switch from Normal world to the secure world and vice-versa. Now I want to access some secure resources from the Normal world to see TrustZone enable features. So i write a small application "switch" with the help of IO_mem_connection and mmio class which access the secure RAM region used by the secure world but nothing happens there it is executing normally in Normal world. What kind of behavior is expected from the Normal world on this access? I am using UART-2 in both the world to print the messages. On the other hand, when i make UART-2 secure in csu.h then normal world doesn't execute at all and DATA ABORT exception occurred. I guess, I have to do some thing with CSU(csu.h) and TZASC (tsc_380.h) to see the TrustZone enable expected behavior. Please, Let me know where i could be wrong or what i can do to proceed further in this direction ? Thanks in advance. Regards Chirag Garg IIT Madras , Rise Lab

2 1

Jump to page:

2026

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

users