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iostream and string in L4Re
by Erry Pradana Darajati 21 Dec '14

21 Dec '14

Hello, L4-hackers. i have a short question. Is iostream and string functions present in L4Re. Since i cannot use it. I have already included the line below in my makefile : *REQUIRES_LIBS += libc_be_file_stdin libstdc++ cxx_libc_io cxx_io* And also, how to make hello-cfg be able to accept keyboard input. I have already include libc_be_file_stdin and include line below in my hello.cfg but it still not working : *L4.default_loader:start({ caps = { log = L4.Env.log,},l4re_dbg = L4.Dbg.Warn,log = { "l4linux", "yellow" },}, "rom/hello");* Thank you for the answers -- *Regards,* *Erry Pradana Darajati | Student of Computer Engineering* *Politeknik Elektronika Negeri Surabaya / EEPIS, Indonesia*

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Problem with running hello world application in l4re
by Gayathri Nagarajan 21 Dec '14

21 Dec '14

I am running ubunthu in 32-bit Oracle VM, but using 64-bit host windows 8. When I use *1. l4re-build$ make grub2iso E=hello MODULE_SEARCH_PATH=/src/kernel/fiasco/mybuild * I get.... make[1]: Entering directory `/home/ubunthu/src/l4' Processing entry 'hello' Could not find 'fiasco' with path ':/home/ubunthu/src/l4/path/to/builddir/bin/x86_586:/home/ubunthu/src/l4/path/to/builddir/bin/x86_586/l4f:/home/ubunthu/src/l4/path/to/builddir/lib/x86_586:/home/ubunthu/src/l4/path/to/builddir/lib/x86_586/l4f' make[1]: *** [grub2iso] Error 1 make[1]: Leaving directory `/home/ubunthu/src/l4' make: *** [grub2iso] Error 2 *2. l4re-build$ make qemu E=hello MODULE_SEARCH_PATH=/src/kernel/fiasco/mybuild* I get.... make[1]: Entering directory `/home/ubunthu/src/l4' Could not find 'fiasco' with path '/path/to/fiasco-build:/home/ubunthu/src/l4/path/to/builddir/bin/x86_586:/home/ubunthu/src/l4/path/to/builddir/bin/x86_586/l4f:/home/ubunthu/src/l4/path/to/builddir/lib/x86_586:/home/ubunthu/src/l4/path/to/builddir/lib/x86_586/l4f' make[1]: *** [qemu] Error 1 make[1]: Leaving directory `/home/ubunthu/src/l4' make: *** [qemu] Error 2 Gayathri

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DARPA funds building stuff on seL4
by Gernot Heiser 17 Dec '14

17 Dec '14

DARPA has just issued a SBIR call titled "Secure Software Components Leveraging the seL4 Microkernel”, see https://www.dodsbir.net/sitis/display_topic.asp?Bookmark=45918 The SBIR program funds “small” enterprises (that’s <500 employees in US speak) that are majority US-owned. The program clearly aims at developing an ecosystem around seL4. In the past US company that won SBIR projects sub-contracted some of the work to NICTA, so there seems to be no problem in involving foreign entities as subcontractors. Gernot

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Re: Need help profiling with Valgrind
by Björn Döbel 12 Dec '14

12 Dec '14

Dear Reinier, Am 05.11.2014 um 23:22 schrieb Reinier Millo Sánchez: > Hello Aaron > I'm working in a project to develop an embedded operating system for > real time purposes using Fiasco.OC as microkernel. I have reviewed you > article "Capability Wrangling Made Easy: Debugging on a Microkernel with > Valgrind". I'm interested to do son profiling tests with Fiasco.OC and > Linux Kernel, using Valgrind. Do you have ported Valgrind to the > Fiasco.OC microkernel interface? Is the port available? please let us use the l4-hackers mailing list for further discussion. Indeed we ported Valgrind to Fiasco.OC and L4Re. Its source code is available in the L4Re SVN in l4/pkg/valgrind. As you might have noticed, our paper was in 2010 and if I remember correctly, the Valgrind version in the repository was last updated around 2011. It might still work, but you may also encounter problems. Feel free to try this out and let us know about any questions you have. Apart from that there may be other ways of achieving your profiling needs on top of Fiasco.OC. What exactly would you want to do? Kind regards, Bjoern

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JDB percent CPU usage
by teclis High Elf 04 Dec '14

04 Dec '14

Is there a way to get percent CPU usage (or any other resource usage ) from JDB? So if I suspect that one task has run amok and is monopolizing the CPU I can search for it using JDB. danke sehr

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L4Re GPIO
by Erry Pradana Darajati 04 Dec '14

04 Dec '14

Hi, L4 Hackers Thanks for the answer on my last email. I have some follow up question from my last email. 1. About GPIO. So IOs defined on LUA script. So in OMAP4460, is gonna be like this, isn't it ? I have a question in line of this code. GPIO = Hw.Device(function() GPIO1 = Hw.Gpio_omap46x_chip(function( ) hid = "gpio-omap46x-GPIO1"; compatible = {"ti,omap4-gpio"}; regs = Res.mmio(0x4A310000, 0x4A310194); // This one is range of Address GPIO1 used irq = Res.irq(29); //This one is IRQ of GPIO1 ? What is the meaning of irq(29) ? scm_table = 0; // I still don't understand about this line end); end); And where can i read the reference about another parameters of this ? (Like there pins parameter in raspi b. And there are mems instead of regs) 2. I try the L4Re with x86 build run in QEMU. And want it to accept my keyboard input. So i need to include x86-legacy.devs module in modules.list and define REQUIRES_LIBS=libc_be_file_stdin isn't it ? But after i've done it, it still doesn't accept keyboard input. what did i miss ? I appreciate any answer and reference. And thanks for the answer -- *Regards,* *Erry Pradana Darajati | Student of Computer Engineering* *Politeknik Elektronika Negeri Surabaya / EEPIS, Indonesia*

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Fail to run compiled ARM on Odroid Q2
by Zachary 03 Dec '14

03 Dec '14

Hi, I want to use fastboot to run the Hello demo of Fiasco on Odroid-Q2 board[1]. However, I failed. Firstly, I use make fastboot_rawimage E=hello MODULE_SEARCH_PATH=... The UART output is: Starting download of 935936 bytes downloading of 935936 bytes finished Kernel size: 000e4000 Ramdisk size: 00000000 Booting raw image.. Boot with zImage Wrong Ramdisk Image Format [err] boot_get_ramdisk Starting kernel ... Hello from Startup::stage2 Per_cpu_data_alloc: (orig: 0xf0060ad0-0xf0061550) Number of IRQs available at this GIC: 160 FPU0: Arch: VFPv3(3), Part: VFPv3(30), r: 4, v: 9, i: 41, t: hard, p: dbl/sngl KERNEL: Warning: No page-fault handler for 0xee202108, error 0x94000848, pc f004 It is said the format is wrong, so I change to make fastboot_uimage E=hello MODULE_SEARCH_PATH=... The UART output: downloading of 937984 bytes finished Kernel size: 000e4040 Ramdisk size: 00000000 Booting kernel.. ## Booting kernel from Legacy Image at 40008000 ... Image Name: L4 Image #4 Image Type: ARM Linux Kernel Image (uncompressed) Data Size: 933888 Bytes = 912 KiB Load Address: 41000000 Entry Point: 41000000 Verifying Checksum ... OK Loading Kernel Image ... OK OK And nothing happen. So what`s the problem? Thanks, Best Regards, Zachary [1] http://www.hardkernel.com/main/products/prdt_info.php?g_code=G135278861948&…

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Re: [ASK] Basic L4Re
by Matthias Lange 01 Dec '14

01 Dec '14

Hi, I'm posting this on l4-hackers also, as it might be of interest for other people as well. On 11/27/2014 04:27 PM, Erry Pradana Darajati wrote: > Greeting Mr. Matthias, > Thank you for the help in my last email. I have already solve some of my > problem thanks to your help. > But i still have some problem and question : > > 1. About the IO server you mentioned before. I still cannot fully > comprehend about the OMAP3 driver you said earlier. As i study in > OMAP4460 TRM, i have know the memory that directly accessed to make GPIO > of OMAP4460 (Pandaboard) works. And i already make it works with a > hardcoding (code without L4Re API) by assign directly the memory address > of GPIO. Can you help me to short explain or gave me a reference about > IO server and how to use it to access the memory address of GPIO ? I am not exactly sure what you mean. Instances of the GPIO driver are created through Lua configuration files. You can see an example in io/config/plat-rpi_b/hw_devices.io. There you can also specify the memory base address of the GPIO chip. An example for Omap3 looks like this: GPIO = Hw.Device(function() GPIO1 = Hw.Gpio_omap35x_chip(function() hid = "gpio-omap35x-GPIO1"; compatible = {"ti,omap3-gpio"}; regs = Res.mmio(0x48310000, 0x48310fff); irq = Res.irq(29); scm_table = 0; end); end); > 2. I still studied the basic of L4Re, and try to run an hello-cfg entry > in modules.list. But when i run using make qemu, it gave an error like > this. > "make[1]: Entering directory `/media/chiqiVstorage/l4resnap/src/l4' > Could not find 'hello.cfg' with path > '/home/erry/l4resnap/src/kernel/fiasco/build86/:/media/chiqiVstorage/l4resnap/src/l4/build86/bin/x86_core2:/media/chiqiVstorage/l4resnap/src/l4/build86/bin/x86_core2/l4f:/media/chiqiVstorage/l4resnap/src/l4/build86/lib/x86_core2:/media/chiqiVstorage/l4resnap/src/l4/build86/lib/x86_core2/l4f' > make[1]: *** [qemu] Error 1 > make[1]: Leaving directory `/media/chiqiVstorage/l4resnap/src/l4' > make: *** [qemu] Error 2" > > where did i go wrong ? You need to add /media/chiqiVstorage/l4resnap/src/l4/conf/examples to your MODULE_SEARCH_PATH. Best, Matthias. > Sorry for the basic question. Any answer and response is really helping > me understand this research and project better, and i really appreciate > that. > > 2014-10-13 15:23 GMT+07:00 Matthias Lange > <matthias.lange(a)kernkonzept.com <mailto:matthias.lange@kernkonzept.com>>: > > Hi, > > On Sat, Oct 11, 2014 at 01:21:11AM +0700, Erry Pradana Darajati wrote: > > Hello L4 Hackers > > > > I am working on a project with L4Re in Pandaboard for my College Final > > Project. And right now i am in a stuck. > > > > So far, i have already know how to boot, print and read from the serial > > port (UART3) of pandaboard. But i can't understand the fundamental / basic > > of L4Re itself. > > A good starting point is the L4Re documentation [0]. This should get you > started. > > > Like how to make a new program outside the main program of "hello" (i am > > using hello code all of this time to experimenting). And also how to access > > the memory of the host computer using L4Re code. > > Just create a new directory within you pkg directory. From there you > can call > '../../mk/tmpl/inst' which installs the default directory hierarchy and > Makefiles. > > > Because the main goal of the project i am working on is be able to access > > the GPIO of Pandaboard. > > The io server already provides infrastructure and the API for GPIO > drivers. > Please have a look at the existing BCM2835 and OMAP3 drivers. > > > And also, is there is any way to recompile L4Re without recompiling all of > > the module it use. Because in my computer it took a time to recompile even > > the change is only a line of code > > You have multiple possibilities. Change into your pkg's directory > and call > 'make -jX O=/path/to/obj/dir' or from your build directory you can > call 'make > -jX S=YOUR_PKG_NAME'. Note that the latter will not check and > rebuild the pkg's > dependencies. > > Matthias. > > [0] http://os.inf.tu-dresden.de/L4Re/doc/ > > > -- > Matthias Lange, matthias.lange(a)kernkonzept.com > <mailto:matthias.lange@kernkonzept.com>, +49 - 351 - 41 88 86 14 > > Kernkonzept GmbH. Sitz: Dresden. Amtsgericht Dresden, HRB 31129. > Geschäftsführer: Dr.-Ing. Michael Hohmuth > > > > > -- > /Regards,/ > /Erry Pradana Darajati | *Student of Computer Engineering*/ > /*Politeknik Elektronika Negeri Surabaya / EEPIS, Indonesia*/

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Server loop does not call dispatch only when running in pthread
by Tobias Sturm 24 Nov '14

24 Nov '14

Hi, I want to have the loop() method of a Registry_server instance inside a pthread. When the client sends messages, I get the IPC error 35 (could not figure out what that error code means). As soon as the loop() is invoked in my main thread, messages come through. Here is some pseudo code: start_thread() { //pack args int err = pthread_create(&my_thread, NULL, &thread_fn, &args); printf("pthread_create says %d", err); } thread_fn(args) { L4Re::Util::Registry_server<>* svr = args.server; server_obj* my_server = args.server_obj_instance; svr->registry()->register_obj(my_server, "foo"); svr->loop(); } class server_obj : public L4::Server_object { public: int dispatch( ... ); } server_obj::dispatch(...) { //never called } Thanks, Tobi

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Run and debug Fiasco.OC kernel and L4Re using a DSTREAM JTAG device and the ARM DS-5 IDE
by Mahdi Aichouch 21 Nov '14

21 Nov '14

Hello to everyone, I have a Freescale i.MX 6 ARM Cortex A9 Sabre SD board. I would like to test the Hello World example using the generated bootstrap.elf binary. I compiled the fiasco kernel and the l4re framework for the i.MX 6 ARM Cortex-A9 using the menu configuration in both cases. Instead of using an SD card to run the binary on the board, I would like to flash the RAM with the binary using the DSTREAM JTAG device and the ARM DS-5 IDE. I connected the board to my host using the mini-usb to serial cable, and I used minicom tool as a serial terminal. I tried to run the binary using the DS-5 debugger while the board is connected through JTAG, but I didn't see any debug message on the serial terminal. The source code I am using is from the "l4re-snapshot-2014092821". My questions: 1) Does anyone tried to run and debug fiasco kernel + l4re on a board using a JTAG device? What are the steps that I am missing? 2) The debug tool print a message saying that "WARNING(IMG53): bootstrap.elf has no source level debug information", what are the options required to include these information compiling the fiasco kernel + l4re? Thank you very much in advance. Best regards, Mehdi PS: screenshot of the IDE debugger view

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