debugging a non-secure app (with tfm)

[randomdude]

Hi,

I was wondering what I need to do, or if it is even possible, to debug a non-secure app which uses TFM.

Running 'west debug' on e.g. the blinky sample works regardless if I built it with secure or non-secure board type on an nrf9160dk. However, on an app that uses modem/crypto/tfm functionality, like the psa_crypto sample from the zephyr repository, that will result in a debugging session that is unable to get to the main function of the app.

This feels like I'm missing something really obvious, but I can't tell what it is. Anyone here willing to push me in the right direction?

Cheers!

[dejans]

Hi,

You could now test the crypto sample from the main branch with build command "west build -b nrf9160dk_nrf9160_ns@your_revision_number", where your_revision_number is revision number of the board. Crypto sample requires target reset.

Best regards,
Dejan

[randomdude]

Hi,

which crypto sample are you referring to, exactly? I have done a fresh install of the main branch of the nrf connect SDK and built the psa_crypto sample in zephyr/samples/tfm_integration, but debugging still fails the same way it did before.

One thing I didn't realize before is that I was using two different zephyr flavors, vanilla and the one that comes with the nrf connect SDK. Not sure if that makes much of a difference in this case, though.

[dejans]

Hi,

I am referring to psa_crypto sample. Which Zephyr version did you use when building your sample?

Best regards,
Dejan

[randomdude]

Still not sure about the terminology. As I understand it, there are two parts to Zephyr. The Zephyr-RTOS source files which are shipped with the nrf connect SDK, and the toolchain, which gets installed in /opt or ~, or wherever. I was using the Zephyr SDK that comes with the nrf connect SDK from the main branch and zephyr toolchain 0.14.2.

[dejans]

Hi,

The toolchain provided by Zephyr is set of tools to help in building and debugging. You should use Zephyr toolchain version 0.14.1 instead of 0.14.2.

Best regards,
Dejan