[ABANDONED] JLinkExe segfaults on Raspberry Pi (ARM)

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  • [ABANDONED] JLinkExe segfaults on Raspberry Pi (ARM)

    In a bash script on Ubuntu x86_64, I have no problem doing:

    Source Code

    1. (JLinkExe -if swd -device nrf52 -AutoConnect 1 -speed 4000 </dev/null >/dev/null &)
    3. telnet localhost 19021
    But on a Raspberry Pi it crashes when stdin is set to /dev/null:

    Source Code

    1. $ uname -a
    2. Linux raspberrypi 4.14.70-v7+ #1144 SMP Tue Sep 18 17:34:46 BST 2018 armv7l GNU/Linux
    3. $ JLinkExe </dev/null
    4. SEGGER J-Link Commander V6.44i (Compiled May 17 2019 17:39:37)
    5. DLL version V6.44i, compiled May 17 2019 17:39:21
    6. Connecting to J-Link via USB...O.K.
    7. Firmware: J-Link OB-SAM3U128-V2-NordicSemi compiled Jan 7 2019 14:07:15
    8. Hardware version: V1.00
    9. S/N: 682780248
    10. VTref=3.300V
    12. Type "connect" to establish a target connection, '?' for help
    13. J-Link>Segmentation fault
    15. $ valgrind -v JLinkExe </dev/null
    16. ==2364==
    17. ...
    18. /lib/arm-linux-gnueabihf/libgcc_s.so.1 due to munmap()
    19. O.K.
    20. Firmware: J-Link OB-SAM3U128-V2-NordicSemi compiled Jan 7 2019 14:07:15
    21. Hardware version: V1.00
    22. S/N: 682780248
    23. VTref=3.300V
    24. Type "connect" to establish a target connection, '?' for help
    25. ==2369== Conditional jump or move depends on uninitialised value(s)
    26. ==2369== at 0x484AA1C: rindex (vg_replace_strmem.c:199)
    27. ==2369== by 0x12863: ??? (in /usr/local/bin/JLinkExe)
    Display All

  • Hello,

    Thank you for your inquiry.
    If I understand you correctly you are trying to use J-Link software on ARM Linux on a Raspberry PI, is that correct?
    Did you install the ARM version of J-Link software (see attached picture)?
    segger.com/downloads/jlink/#J-…twareAndDocumentationPack

    Best regards,
    Nino
    Images

    • Capture.PNG

      25.85 kB, 832×173, viewed 547 times
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  • Yes, I used the tar.gz package for ARM. Perhaps, J-Link should include the architecture nomenclature [[armv71]] in the startup output:

    Source Code

    1. $ JLinkExe </dev/null
    2. SEGGER J-Link Commander V6.44i (Compiled May 17 2019 17:39:37) [[armv71]
    3. DLL version V6.44i, compiled May 17 2019 17:39:21
    4. Connecting to J-Link via USB...O.K.
    5. Firmware: J-Link OB-SAM3U128-V2-NordicSemi compiled Jan 7 2019 14:07:15
    6. ...
    It has been used successfully on all our Pi's. The bug I've run into is redirecting standard input from /dev/null, "</dev/null". Which does work properly on an x86 system (using the appropriate .deb) package.