Problem during test_suite generation while cross-compiling on version 3.6.2 - mbed-tls

20 Feb 2025


      Hello Everybody,
I am trying to migrate my cross-compilation setup from version 2.28.9 to
version 3.6.2.
I use a Makefile based approach for compilation.
Everything seems to work fine up to the point where the compilation process
reaches the test_suite data generation
Gen   suites/test_suite_psa_crypto_generate_key.generated.data
suites/test_suite_psa_crypto_low_hash.generated.data
suites/test_suite_psa_crypto_not_supported.generated.data
suites/test_suite_psa_crypto_op_fail.generated.data
suites/test_suite_psa_crypto_storage_format.current.data
suites/test_suite_psa_crypto_storage_format.v0.data
At that point it seems that the python based tools attempts to execute a
temp executable (generated for my cross-compilation target ?) which fails.
The traceback obtained is  the following:
Traceback (most recent call last):
  File "../framework/scripts/generate_psa_tests.py", line 849, in <module>
    test_data_generation.main(sys.argv[1:], __doc__, PSATestGenerator)
  File
"/home/dev/test/mbed-TLS_3.6.2/framework/scripts/mbedtls_framework/test_data_generation.py",
line 224, in main
    generator.generate_target(target)
  File "../framework/scripts/generate_psa_tests.py", line 845, in
generate_target
    super().generate_target(name, self.info)
  File
"/home/dev/test/mbed-TLS_3.6.2/framework/scripts/mbedtls_framework/test_data_generation.py",
line 177, in generate_target
    self.write_test_data_file(name, test_cases)
  File
"/home/dev/test/mbed-TLS_3.6.2/framework/scripts/mbedtls_framework/test_data_generation.py",
line 164, in write_test_data_file
    test_case.write_data_file(filename, test_cases)
  File
"/home/dev/test/mbed-TLS_3.6.2/framework/scripts/mbedtls_framework/test_case.py",
line 88, in write_data_file
    for tc in test_cases:
  File "../framework/scripts/generate_psa_tests.py", line 694, in
all_test_cases
    if key.location_value() != 0:
  File
"/home/dev/test/mbed-TLS_3.6.2/framework/scripts/mbedtls_framework/psa_storage.py",
line 186, in location_value
    return self.lifetime.value() >> 8
  File
"/home/dev/test/mbed-TLS_3.6.2/framework/scripts/mbedtls_framework/psa_storage.py",
line 89, in value
    self.update_cache()
  File
"/home/dev/test/mbed-TLS_3.6.2/framework/scripts/mbedtls_framework/psa_storage.py",
line 67, in update_cache
    include_path=includes) #type: List[str]
  File
"/home/dev/test/mbed-TLS_3.6.2/framework/scripts/mbedtls_framework/c_build_helper.py",
line 158, in get_c_expression_values
    output = subprocess.check_output([exe_name])
  File "/usr/lib/python3.7/subprocess.py", line 395, in check_output
    **kwargs).stdout
  File "/usr/lib/python3.7/subprocess.py", line 472, in run
    with Popen(*popenargs, **kwargs) as process:
  File "/usr/lib/python3.7/subprocess.py", line 775, in __init__
    restore_signals, start_new_session)
  File "/usr/lib/python3.7/subprocess.py", line 1522, in _execute_child
    raise child_exception_type(errno_num, err_msg, err_filename)
OSError: [Errno 8] Exec format error: '/tmp/tmp--m95sjmdw'
make[2]: *** [Makefile:127: generated_psa_test_data] Error 1
make[2] : on quitte le répertoire « /home/dev/test/mbed-TLS_3.6.2/tests »
make[1]: *** [Makefile:35: tests] Error 2
make[1] : on quitte le répertoire « /home/dev/test/mbed-TLS_3.6.2 »
make: *** [test.make:152: all] Error 2
Looking at the format of the generated tmp executable, it seems it is
generated for my cross-compilation target, it therefore cannot be executed
in my compilation environment.
I would like to be able to generate the test and test data in order to be
able to execute them on my compilation target, which is what I used to do
with the previously integrated version of the library.
Is there something I am missing in my compilation? am I missing a specific
setup variable in my Makefile?
Thanks for your feedback.
Best regards,
Francois