Custom firmware error: cannot execute binary file: Exec format error

[Anthony Leung]

Hi, I am experiencing issues with using the pycom-micropython-sigfox library to build a custom firmware. I've created an issue ticket on github but would like to post it here in search for someone knowing a resolve here or could benefit from this when searching for the same problem. https://github.com/pycom/pycom-micropython-sigfox/issues/601

Original Information

Running into errors when building custom firmware and found no resolve in the issues forum. Could I please get some assistance?

• Pycom board: FiPy

• Firmware: (sysname='FiPy', nodename='FiPy', release='1.20.2.r6', version='v1.11-c5a0a97 on 2021-10-28', machine='FiPy with ESP32', lorawan='1.0.2', sigfox='1.0.1', pybytes='1.7.1')

• Operating system: Linux raspberrypi 5.10.17-v7+ #1414 SMP Fri Apr 30 13:18:35 BST 2021 armv7l GNU/Linux

• Exact steps to cause this issue

  1. I completed the setup as per instructed in README file.
  2. Then tried to build the firmware with make BOARD=FIPY clean - no problems there
  3. Then I tried to run make BOARD=FIPY which yielded the error below

• What you expected

  • I expected the firmware to successfully build however this was not the case.

• What happened instead

  • Instead I got the following error:

$ make BOARD=FIPY V=1 
Use make SECURE=on [optionally SECURE_KEY ?= secure_boot_signing_key.pem] to enable Secure Boot and Flash Encryption mechanisms.
COAP Module Enabled
LORA Module Enabled
SIGFOX Module Enabled
Variant: BASE
bash tools/idfVerCheck.sh /home/pi/pycom-esp-idf "3394ee5"
IDF Version OK! 3394ee5
bash tools/mpy-build-check.sh FIPY release BASE
python check_secure_boot.py --SECURE off
CC bootloader/bootloader.c
xtensa-esp32-elf-gcc -DESP_PLATFORM -Wpointer-arith -Wall -Werror=all -Wno-error=unused-function -Wno-error=unused-but-set-variable -Wno-error=unused-variable -Wl,-EL -mlongcalls -Wall -ffunction-sections -fdata-sections -fno-common -Wno-sign-compare -Wno-old-style-declaration -fstrict-volatile-bitfields -Wno-error=deprecated-declarations -Wno-unused-parameter -DWITH_POSIX  -mfix-esp32-psram-cache-issue -Os -nostdlib -std=gnu99 -g3 -ggdb -fstrict-volatile-bitfields -Iboards/FIPY -DFFCONF_H=\"lib/oofatfs/ffconf.h\"  -DMOD_COAP_ENABLED -DMOD_LORA_ENABLED -DMOD_SIGFOX_ENABLED -I. -I.. -Ihal -Iutil -Imods -Itelnet -Iftp -Ilora -Ilte -Ican -Ibootloader -Ifatfs/src/drivers -Ilittlefs -Ibuild/FIPY/release -Ibuild/FIPY/release/genhdr -I/home/pi/pycom-esp-idf/components/bootloader_support/include -I/home/pi/pycom-esp-idf/components/bootloader_support/include_priv -I/home/pi/pycom-esp-idf/components/bootloader_support/include_bootloader -I/home/pi/pycom-esp-idf/components/mbedtls/mbedtls/include -I/home/pi/pycom-esp-idf/components/mbedtls/port/include -I/home/pi/pycom-esp-idf/components/driver/include -I/home/pi/pycom-esp-idf/components/driver/include/driver -I/home/pi/pycom-esp-idf/components/heap/include -I/home/pi/pycom-esp-idf/components/esp32 -I/home/pi/pycom-esp-idf/components/esp32/include -I/home/pi/pycom-esp-idf/components/esp_ringbuf/include -I/home/pi/pycom-esp-idf/components/esp_event/include -I/home/pi/pycom-esp-idf/components/esp_adc_cal/include -I/home/pi/pycom-esp-idf/components/soc/include -I/home/pi/pycom-esp-idf/components/soc/esp32/include -I/home/pi/pycom-esp-idf/components/expat/include -I/home/pi/pycom-esp-idf/components/freertos/include -I/home/pi/pycom-esp-idf/components/json/include -I/home/pi/pycom-esp-idf/components/expat/include -I/home/pi/pycom-esp-idf/components/lwip/include/lwip -I/home/pi/pycom-esp-idf/components/lwip/include/lwip/port -I/home/pi/pycom-esp-idf/components/lwip/include/apps -I/home/pi/pycom-esp-idf/components/lwip/port/esp32/include -I/home/pi/pycom-esp-idf/components/lwip/lwip/src/include -I/home/pi/pycom-esp-idf/components/lwip/include/lwip/posix -I/home/pi/pycom-esp-idf/components/newlib/include -I/home/pi/pycom-esp-idf/components/newlib/platform_include -I/home/pi/pycom-esp-idf/components/nvs_flash/include -I/home/pi/pycom-esp-idf/components/spi_flash/include -I/home/pi/pycom-esp-idf/components/tcpip_adapter/include -I/home/pi/pycom-esp-idf/components/log/include -I/home/pi/pycom-esp-idf/components/sdmmc/include -I/home/pi/pycom-esp-idf/components/vfs/include -I/home/pi/pycom-esp-idf/components/bt/include -I/home/pi/pycom-esp-idf/components/bt/bluedroid/device/include -I/home/pi/pycom-esp-idf/components/bt/bluedroid/device/include/device -I/home/pi/pycom-esp-idf/components/bt/bluedroid/bta/dm -I/home/pi/pycom-esp-idf/components/bt/bluedroid/bta/hh -I/home/pi/pycom-esp-idf/components/bt/bluedroid/bta/include -I/home/pi/pycom-esp-idf/components/bt/bluedroid/bta/sys/include -I/home/pi/pycom-esp-idf/components/bt/bluedroid/common/include -I/home/pi/pycom-esp-idf/components/bt/bluedroid/stack/include -I/home/pi/pycom-esp-idf/components/bt/bluedroid/stack/gatt/include -I/home/pi/pycom-esp-idf/components/bt/bluedroid/stack/gap/include -I/home/pi/pycom-esp-idf/components/bt/bluedroid/stack/l2cap/include -I/home/pi/pycom-esp-idf/components/bt/bluedroid/btcore/include -I/home/pi/pycom-esp-idf/components/bt/bluedroid/osi/include -I/home/pi/pycom-esp-idf/components/bt/bluedroid/hci/include -I/home/pi/pycom-esp-idf/components/bt/bluedroid/gki/include -I/home/pi/pycom-esp-idf/components/bt/bluedroid/api/include -I/home/pi/pycom-esp-idf/components/bt/bluedroid/btc/include -I/home/pi/pycom-esp-idf/components/coap/libcoap/include/coap -I/home/pi/pycom-esp-idf/components/coap/libcoap/examples -I/home/pi/pycom-esp-idf/components/coap/port/include -I/home/pi/pycom-esp-idf/components/coap/port/include/coap -I/home/pi/pycom-esp-idf/components/mdns/include -I../lib/mp-readline -I../lib/netutils -I../lib/oofatfs -I../lib -I../drivers/sx127x -I../ports/stm32 -I/home/pi/pycom-esp-idf/components/openthread/src -Ibsdiff -DMICROPY_NLR_SETJMP=1 -DMBEDTLS_CONFIG_FILE='"mbedtls/esp_config.h"' -DHAVE_CONFIG_H -DESP_PLATFORM -DFFCONF_H=\"lib/oofatfs/ffconf.h\" -DWITH_POSIX -DREGION_AS923 -DREGION_AU915 -DREGION_EU868 -DREGION_US915 -DREGION_CN470 -DREGION_EU433 -DREGION_IN865 -DBASE=0 -DPYBYTES=1  -DVARIANT=0 -DNDEBUG -D BOOTLOADER_BUILD=1 -c -MD -o build/FIPY/release/bootloader/bootloader.o bootloader/bootloader.c
bash: /home/pi/esp/xtensa-esp32-elf/bin/xtensa-esp32-elf-gcc: cannot execute binary file: Exec format error
make: *** [../py/mkrules.mk:47: build/FIPY/release/bootloader/bootloader.o] Error 126

[livius]

@Anthony-Leung
Hi, why did you write???
Operating system: Linux raspberrypi 5.10.17-v7+ #1414 SMP Fri Apr 30 13:18:35 BST 2021 armv7l GNU/Linux

Do you try to build this firmware on raspberrypi?
If yes, try first to build on some more common system, if there will be ok, then probably not supported on rpi

[Anthony Leung]

Hi @livius, thank you for pointing that out.

Yes I had been running on RaspberryPi thinking it would be better than running on a substystem for Linux. I was initially struggling with using Windows Subsystem for Linux (WSL) and following the instructions listed on github. I had extracted the xtensa gcc compiler tar.gz file incorrectly, by using WinRAR onto my Ubuntu file system - this must've corrupted some of the data.

This time, I copied the tar.gz file into the Ubuntu file system and extracted it using Linux commands, the process had run smoothly and I was able to build a binary file.

Thank you very much!