- Devel - lists.sel4.systems

Some guidance when using AutoCorres.
by Dan DaCosta 25 Oct '17

25 Oct '17

seL4 Developers: Consider the following c structure declarations: struct foo_struct{ uint16_t subfield; }; struct bar_struct{ struct foo foo; }; I am wondering if anyone has any suggestions on how I might go about proving something like this: s[Ptr &(bar→[''foo_C'']) := subfield_C_update (λ_. b) (heap_MissionCommand_struct_C s (Ptr &(bar→[''foo_C''])))] = s[Ptr &(bar→[''missioncommand_C''])→subfield := b] where s of type lifted_globals, bar is of type foo_struct_C, and b is of type word16. I *think* it should be provable, i.e., "updating all of the foo field with a copy of what was there originally modulo some change to subfield is equivalent to making that change directly to the subfield." I apologize in for taking this "into the weeds" but some of the definitions being used are buried in the AutoCorres translation and I am unsure how to make my question more abstract. Thanks in Advance! Dan DaCosta

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Booting seL4 in bbb (beaglebone black)
by Sathish Kumar Balasubramaniam -ERS, HCL Tech 24 Oct '17

24 Oct '17

I tried booting sel4test in bbb. but i got the following after u-boot. Any idea for this crash ? U-Boot# echo $loadaddr 0x82000000 U-Boot# fatload mmc 0 ${loadaddr} sel4test.bin reading sel4test.bin 4108544 bytes read in 245 ms (16 MiB/s) U-Boot# go ${loadaddr} ## Starting application at 0x82000000 ... ELF-loader started on CPU: ARM Ltd. Cortex-A8 r3p2 paddr=[82000000..823fc81f] ELF-loading image 'kernel' paddr=[80000000..80036fff] vaddr=[f0000000..f0036fff] virt_entry=f0000000 ELF-loading image 'sel4test-driver' paddr=[80037000..80514fff] vaddr=[8000..4e5fff] virt_entry=21c9c Enabling MMU and paging Jumping to kernel-image entry point... Bootstrapping kernel Booting all finished, dropped to user space Caught cap fault in send phase at address 0x0 while trying to handle: unknown syscall 0xf0005 in thread 0xf7fec500 "rootserver" at address 0x18b60 With stack: 0x3d88a0: 0x84ac 0x3d88a4: 0x1711c 0x3d88a8: 0x46c0f 0x3d88ac: 0x0 0x3d88b0: 0x84ac 0x3d88b4: 0x172cc 0x3d88b8: 0x3e5224 0x3d88bc: 0x46c0f 0x3d88c0: 0x84ac 0x3d88c4: 0xecfc 0x3d88c8: 0x31 0x3d88cc: 0x0 0x3d88d0: 0x0 0x3d88d4: 0x0 0x3d88d8: 0x0 0x3d88dc: 0x0 ::DISCLAIMER:: ---------------------------------------------------------------------------------------------------------------------------------------------------- The contents of this e-mail and any attachment(s) are confidential and intended for the named recipient(s) only. E-mail transmission is not guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or may contain viruses in transmission. The e mail and its contents (with or without referred errors) shall therefore not attach any liability on the originator or HCL or its affiliates. Views or opinions, if any, presented in this email are solely those of the author and may not necessarily reflect the views or opinions of HCL or its affiliates. Any form of reproduction, dissemination, copying, disclosure, modification, distribution and / or publication of this message without the prior written consent of authorized representative of HCL is strictly prohibited. If you have received this email in error please delete it and notify the sender immediately. Before opening any email and/or attachments, please check them for viruses and other defects. ----------------------------------------------------------------------------------------------------------------------------------------------------

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Re: [seL4] sel4Test development Tx1 platform
by Kofidoku.Atuah＠data61.csiro.au 24 Oct '17

24 Oct '17

Hi Munees, I went through some methods for how to boot the seL4 kernel on a stock TX1 board yesterday and wrote this guide: https://wiki.sel4.systems/Hardware/jetsontx1 It goes through the steps for getting seL4 booted using an SD Card, the internal 15GiB mass storage on the TX1, or using a USB cable and the DFU protocol.? DFU is probably a lot faster/better for you f you're doing active development. Could you try one of these methods and let me know if any of them works for you? -- Kofi Doku Atuah Kernel engineer DATA61 | CSIRO

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Loading bin image on RPI3(Remainder)
by ashokk＠spanidea.com 23 Oct '17

23 Oct '17

Hi all, I built a bin image from sel4test (https://github.com/seL4/sel4test).I am trying to load .bin image on RPI-3, but it's failing. I am following below steps... U-Boot> fatload mmc 0 0x00200000 kernel.binreading kernel.bin2108096 bytes read in 329 ms (6.1 MiB/s)U-Boot> go 0x00200000## Starting application at 0x00200000 ... i got stuck here... Along with this i also tried with two another methods but facing same issue..METHOD-1 :-==========U-Boot> fatload mmc 0 0x00200000 kernel.binreading kernel.bin2108096 bytes read in 330 ms (6.1 MiB/s)U-Boot> loadb 0x00200000 115200## Ready for binary (kermit) download to 0x00200000 at 115200 bps..U-Boot> load mmc 0:1 0x00200000 kernel.bin2108096 bytes read in 330 ms (6.1 MiB/s)U-Boot> go 0x00200000## Starting application at 0x00200000 ...METHOD-2:- ===========U-Boot> load mmc 0:1 0x00200000 kernel.binreading kernel.bin2108096 bytes read in 330 ms (6.1 MiB/s)U-Boot> go 0x00200000## Starting application at 0x00200000 ... please guide me through this issue, i wanted to load kernel.bin(sel4test-driver-image-arm-bcm2837.bin) file on RPI-3.... RegardsAshok

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Questions on seL4's scheduling
by Norrathep Rattanavipanon 20 Oct '17

20 Oct '17

Hello, I have a few questions about seL4's scheduling model in the main (formally verified) branch. 1) I see the time slice parameter in make menuconfig. Is that where I can change the scheduler's time slice correct? And the unit is in timer tick period I suppose? 2) I kind of remember the discussion we had that if an interrupt handler has lower priority than the currently running task, then the interrupt wouldnt happen. So what if both of them have the same priority, would the kernel schedule the currently running task until it uses up all of its timeslice, then issues the interrupt notification or would the interrupting process get executed right away? Best Regards, Oak -- Norrathep (Oak) Rattanavipanon M.S. in Computer Science University of California - Irvine

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64 bit ARM ELF image load in Tx1 platform
by Muneeswaran Rajendran 18 Oct '17

18 Oct '17

Hi All, I have been trying to load 64bit seL4 (kernel+user space) ELF image on Tx1 board but it's failed to start the application and crashed with reason '"Synchronous Abort" handler, esr 0x02000000' always. Just walk through the Tx1 u-boot code and found that 'load_elf_image_phdr(unsigned long addr)' is using 32bit ELF header structure pointer to load the program header. I would like to understand whether 64bit ELF image load handled using 32bit elf header itself or we need to configure u-boot to load 64 bit ELF image ? I have modified the kernel base addr as 0xffffffc000080000 and phyadd as 0x80080000 to boot sel4 app image on TX1 board nothing has worked out. Please share details if someone succeeded to bring sel4 app elf image on Tx1 platform. Regards, Munees

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Loading bin image on RPI3
by ashokk＠spanidea.com 17 Oct '17

17 Oct '17

Hi, I am trying to load .bin image on RPI-3, but i am not able to do that one i am following below steps... U-Boot> fatload mmc 0 0x00200000 kernel.binreading kernel.bin2108096 bytes read in 329 ms (6.1 MiB/s)U-Boot> go 0x00200000## Starting application at 0x00200000 ... i got stuck... Along with this i also tried with two another methods but facing same issue..METHOD-1 U-Boot> fatload mmc 0 0x00200000 kernel.binreading kernel.bin2108096 bytes read in 330 ms (6.1 MiB/s)U-Boot> loadb 0x00200000 115200## Ready for binary (kermit) download to 0x00200000 at 115200 bps..U-Boot> load mmc 0:1 0x00200000 kernel.binreading kernel.bin2108096 bytes read in 330 ms (6.1 MiB/s)U-Boot> go 0x00200000## Starting application at 0x00200000 ... METHOD-2 U-Boot> load mmc 0:1 0x00200000 kernel.binreading kernel.bin2108096 bytes read in 330 ms (6.1 MiB/s)U-Boot> go 0x00200000## Starting application at 0x00200000 ... please guide me through this issue, i wanted to load sel4test.bin(sel4test-driver-image-arm-bcm2837.bin) file on RPI-3.... RegardsAshok

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sel4Test development Tx1 platform
by Muneeswaran Rajendran 13 Oct '17

13 Oct '17

Hi All I able to build sel4Test driver for TX1 platform. but the final outputimage is not a executable image it shows as data format :~/sel4Test$ file images/sel4test-driver-image-arm-tx1.bin images/sel4test-driver-image-arm-tx1.bin: data used 'aarch64-linux-gnu-' toolchain for cross compilation. but in the kernel obj shows as 64 bit ARM aarch64 format. ~/sel4Test$ file build/kernel/kernel.o build/kernel/kernel.o: ELF 64-bit LSB relocatable, ARM aarch64, version 1 (SYSV), not stripped And cross checked in the tk1 platform the generated output file as exe file format. ~/sel4Test$ file images/sel4test-driver-image-arm-tk1 images/sel4test-driver-image-arm-tk1: ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), statically linked, stripped Can you please someone help me to get final out image as executable format. Also share the procedure to load the sel4Test driver on TX1 board to verify the test. Thanks in advance Munees

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does seL4 support NVIDIA Jetson Tx2 board ?
by ashokk＠spanidea.com 13 Oct '17

13 Oct '17

Hi , I am newbie to sel4 and currently working on one hobby project.I want to bring sel4 kernel on TX2 board. Can you guide me that is there any support available for tx2 for . If yes then provide some docs related to that. Thank you.

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Re: [seL4] Devel Digest, Vol 41, Issue 11
by ashokk＠spanidea.com 11 Oct '17

11 Oct '17

Hi, I am going through the SEL4 userspace code of UART driver for TX1/TK1 board but i have some doubts in the below given link..https://github.com/seL4/util_libs/blob/master/libplatsupport/mach_inc… In serial.h file they are defining IRQ numbers #define UARTA_IRQ 68 #define UARTB_IRQ 69 #define UARTC_IRQ 78 #define UARTD_IRQ 122 I am not able to find the above IRQ numbers in TX1/TK1 datasheet...can you please point out where they are referring these IRQ numbers(68, 69, 78, 122)... RegardsAshok From: "devel-request(a)sel4.systems" <devel-request(a)sel4.systems> To: devel(a)sel4.systems Sent: Tuesday, 10 October 2017 6:31 AM Subject: Devel Digest, Vol 41, Issue 11 Send Devel mailing list submissions to devel(a)sel4.systems To subscribe or unsubscribe via the World Wide Web, visit https://sel4.systems/lists/listinfo/devel or, via email, send a message with subject or body 'help' to devel-request(a)sel4.systems You can reach the person managing the list at devel-owner(a)sel4.systems When replying, please edit your Subject line so it is more specific than "Re: Contents of Devel digest..." Today's Topics: 1. Re: TX1 user-space drivers (Kofidoku.Atuah(a)data61.csiro.au) 2. Re: sel4Test development Tx1 platform (Kofidoku.Atuah(a)data61.csiro.au) ---------------------------------------------------------------------- Message: 1 Date: Mon, 9 Oct 2017 23:32:17 +0000 From: <Kofidoku.Atuah(a)data61.csiro.au> To: <devel(a)sel4.systems> Subject: Re: [seL4] TX1 user-space drivers Message-ID: <1507591937169.95333(a)data61.csiro.au> Content-Type: text/plain; charset="iso-8859-1" Munees, I'm fairly sure that the TX1 can use the UART driver in there, since we have that driver in regression, being tested almost daily on a TX1 board -- that driver is the one used by seL4test on the TX1 in this test here: https://github.com/seL4/sel4test/blob/master/apps/sel4test-tests/src/tests/… You also asked whether you have to migrate anything to the TX1. To my knowledge, no, because the TX1 is already running in regression internally, and that UART driver I linked you to is used by the TX1 port with no modifications. As for your question about the TX2, I cannot comment on whether or not the TX2 works the same as the TX1 because I have no experience with the TX2, since we do not have this board internally, and because seL4 does not officially support the TX2. If you want to port seL4 to the TX2, it would require some effort in figuring out what the differences between the TX1 and TX2 are, as far as I can tell :) -- Kofi Doku Atuah Kernel engineer DATA61 | CSIRO

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