openocd does not support 64 bit target HiFive Unleashed

[arshadaleem-lm]

I'm trying to Debug a hello world application on HiFive Unleashed using PlatformIO Core (CLI) tool. I've setup the utility using this Wiki:
https://docs.platformio.org/en/latest/core/installation.html#installation

And used these commands to debug the application:
https://github.com/platformio/platform-sifive/tree/master/examples/freedom-e-sdk_hello?utm_source=platformio.org&utm_medium=docs

I'm facing a strange error while starting the debug session:

    Error: invalid ELF file, only 32bits files are supported
    embedded:startup.tcl:486: Error: ** Programming Failed **

Here are the complete verbose logs:

    arshadaleem@lmlpt52:~/platformio/platform-sifive/examples/freedom-e-sdk_hello$ platformio run -e sifive-hifive-unleashed --target upload -v
    Processing sifive-hifive-unleashed (platform: sifive; framework: freedom-e-sdk; board: hifive-unleashed; monitor_speed: 115200)
    ----------------------------------------------------------------------------------------------------------------------------------------------
    CONFIGURATION: https://docs.platformio.org/page/boards/sifive/hifive-unleashed.html
    PLATFORM: SiFive (2.4.0) > HiFive Unleashed
    HARDWARE: FU540 1500MHz, 8GB RAM, 32MB Flash
    DEBUG: Current (ftdi) On-board (ftdi, qemu, renode)
    PACKAGES: 
     - framework-freedom-e-sdk 2.20050003.200818 (2005.0.3) 
     - tool-jlink 1.65200.0 (6.52.0) 
     - tool-openocd-riscv 2.1000.20190927 (10.0) 
     - toolchain-riscv 1.80300.190927 (8.3.0)
    LDF: Library Dependency Finder -> 
    LDF Modes: Finder ~ chain, Compatibility ~ soft
    Found 0 compatible libraries
    Scanning dependencies...
    No dependencies
    Building in release mode
    MethodWrapper(["checkprogsize"], [".pio/build/sifive-hifive-unleashed/firmware.elf"])
    Advanced Memory Usage is available via "PlatformIO Home > Project Inspect"
    RAM:   [          ]   0.0% (used 17380 bytes from 8589934592 bytes)
    Flash: [          ]   0.1% (used 23612 bytes from 33554432 bytes)
    text	   data	    bss	    dec	    hex	filename
      13716	   9896	   7484	  31096	   7978	.pio/build/sifive-hifive-unleashed/firmware.elf
    <lambda>(["upload"], [".pio/build/sifive-hifive-unleashed/firmware.elf"])
    AVAILABLE: ftdi
    CURRENT: upload_protocol = ftdi
    openocd -c "debug_level 2" -s /home/arshadaleem/.platformio/packages/tool-openocd-riscv -s /share/openocd/scripts -f /home/arshadaleem/.platformio/packages/framework-freedom-e-sdk/bsp/sifive-hifive-unleashed/openocd.cfg -c "program {.pio/build/sifive-hifive-unleashed/firmware.elf}  verify; shutdown;"
    Open On-Chip Debugger 0.10.0+dev (SiFive OpenOCD 0.10.0-2019.08.2)
    Licensed under GNU GPL v2
    For bug reports:
    	https://github.com/sifive/freedom-tools/issues
    debug_level: 2
    adapter speed: 10000 kHz
    Info : auto-selecting first available session transport "jtag". To override use 'transport select <transport>'.
    Info : Hardware thread awareness created
    Info : ftdi: if you experience problems at higher adapter clocks, try the command "ftdi_tdo_sample_edge falling"
    Info : clock speed 10000 kHz
    Info : JTAG tap: riscv.cpu tap/device found: 0x20000913 (mfg: 0x489 (SiFive Inc), part: 0x0000, ver: 0x2)
    Info : datacount=2 progbufsize=16
    Info : Disabling abstract command reads from CSRs.
    Info : Core 0 could not be made part of halt group 1.
    Info : Examined RISC-V core; found 5 harts
    Info :  hart 0: XLEN=64, misa=0x8000000000101105
    Info :  hart 1: currently disabled
    Info :  hart 2: currently disabled
    Info :  hart 3: currently disabled
    Info :  hart 4: currently disabled
    Info : datacount=2 progbufsize=16
    Info : Disabling abstract command reads from CSRs.
    Info : Core 1 could not be made part of halt group 1.
    Info : Examined RISC-V core; found 5 harts
    Info :  hart 0: currently disabled
    Info :  hart 1: XLEN=64, misa=0x800000000014112d
    Info :  hart 2: currently disabled
    Info :  hart 3: currently disabled
    Info :  hart 4: currently disabled
    Info : datacount=2 progbufsize=16
    Info : Disabling abstract command reads from CSRs.
    Info : Core 2 could not be made part of halt group 1.
    Info : Examined RISC-V core; found 5 harts
    Info :  hart 0: currently disabled
    Info :  hart 1: currently disabled
    Info :  hart 2: XLEN=64, misa=0x800000000014112d
    Info :  hart 3: currently disabled
    Info :  hart 4: currently disabled
    Info : datacount=2 progbufsize=16
    Info : Disabling abstract command reads from CSRs.
    Info : Core 3 could not be made part of halt group 1.
    Info : Examined RISC-V core; found 5 harts
    Info :  hart 0: currently disabled
    Info :  hart 1: currently disabled
    Info :  hart 2: currently disabled
    Info :  hart 3: XLEN=64, misa=0x800000000014112d
    Info :  hart 4: currently disabled
    Info : datacount=2 progbufsize=16
    Info : Disabling abstract command reads from CSRs.
    Info : Core 4 could not be made part of halt group 1.
    Info : Examined RISC-V core; found 5 harts
    Info :  hart 0: currently disabled
    Info :  hart 1: currently disabled
    Info :  hart 2: currently disabled
    Info :  hart 3: currently disabled
    Info :  hart 4: XLEN=64, misa=0x800000000014112d
    Info : Listening on port 3333 for gdb connections
    Info : Found flash device 'issi is25wp256d' (ID 0x0019709d)
    Warn : device needs paging or 4-byte addresses - not implemented
    cleared protection for sectors 64 through 511 on flash bank 0
    Ready for Remote Connections
    Info : JTAG tap: riscv.cpu tap/device found: 0x20000913 (mfg: 0x489 (SiFive Inc), part: 0x0000, ver: 0x2)
    ** Programming Started **
    auto erase enabled
    Error: invalid ELF file, only 32bits files are supported
    embedded:startup.tcl:486: Error: ** Programming Failed **
    in procedure 'program' 
    in procedure 'program_error' called at file "embedded:startup.tcl", line 545
    at file "embedded:startup.tcl", line 486
    *** [upload] Error 1
    ========================================================= [FAILED] Took 0.82 seconds =========================================================
    (penv) 

Output of readelf is as follows:

    arshadaleem@lmlpt52:~/platformio/platform-sifive/examples/freedom-e-sdk_hello$ readelf -h .pio/build/sifive-hifive-unleashed/firmware.elf
    ELF Header:
      Magic:   7f 45 4c 46 02 01 01 00 00 00 00 00 00 00 00 00 
      Class:                             ELF64
      Data:                              2's complement, little endian
      Version:                           1 (current)
      OS/ABI:                            UNIX - System V
      ABI Version:                       0
      Type:                              EXEC (Executable file)
      Machine:                           RISC-V
      Version:                           0x1
      Entry point address:               0x20000000
      Start of program headers:          64 (bytes into file)
      Start of section headers:          47872 (bytes into file)
      Flags:                             0x1, RVC, soft-float ABI
      Size of this header:               64 (bytes)
      Size of program headers:           56 (bytes)
      Number of program headers:         6
      Size of section headers:           64 (bytes)
      Number of section headers:         15
      Section header string table index: 14

It appears that openocd available with PlatformIO only supports 32 bits targets.

Thanks.

[jatanpandya83]

Does OpenOCD support 64 bit targets?

[arshadaleem-lm]

Does OpenOCD support 64 bit targets?

Well, the OpenOCD shipped with FreedomStudio does support HiFive Unleashed, i.e. 64 bit target.

[jatanpandya83]

Thanks Arshad ! This is very helpful.

I was discouraged when I read the below on openocd.org:
http://openocd.org/doc/doxygen/html/targetnotarm.html#:~:text=64%20bit,only%20supports%2032%20bit%20targets

I will try with the forked version of openocd from freedom studio.

Thanks once again,
Jatan

[jatanpandya83]

Hi Arshad,

Did you use the already built OpenOCD from freedom studio? I couldn't use that because I need OpenOCD with bitbang driver. Looks like the pre-built OpenOCD on freedom studio supports USB.

Thanks,
Jatan

[arshadaleem-lm]

Hi Arshad,

Did you use the already built OpenOCD from freedom studio? I couldn't use that because I need OpenOCD with bitbang driver. Looks like the pre-built OpenOCD on freedom studio supports USB.

Thanks,
Jatan

Hi Jatan,
Yes I used the already built OpenOCD from Freedom Studio. And yes, it supports USB debugging.

Regards,
Arshad

[jatanpandya83]

Thanks Arshad !