Hi Kumar,

Thanks a lot for reporting this issue. We had also reported it to the GNU toolchain team and were waiting them to make it public.

Hi all,

Now the details of this issue can be found in https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99157. AFIAK, there is no workaround for this issue yet, without modifying the GNU toolchain source code. So I'd like to suggest to *not* use GNU Arm embedded toolchain version 10-2020-q4-major now. The earlier versions are not affected.

Best regards, Hu Ziji

-----Original Message----- From: TF-M tf-m-bounces@lists.trustedfirmware.org On Behalf Of Kumar Gala via TF-M Sent: Friday, February 19, 2021 2:41 AM To: Adrian Shaw via TF-M tf-m@lists.trustedfirmware.org Subject: [TF-M] Bug in GNU Arm Embedded toolchain (version 10-2020-q4-major) for TFM

Be aware that the binary release of the GNU Arm embedded toolchain version 10-2020-q4-major has a bug in it that impacts TFM support.

I’ve reported this to the Arm team that works on the toolchain and provided a fix as well. The libgcc/cmse.o code isn’t being properly compiled and thus doesn’t work correctly.

I’ve made the fix in the Zephyr SDK toolchain that provides an Arm embedded build:

https://github.com/zephyrproject-rtos/sdk-ng

Bug fix here:

https://github.com/zephyrproject-rtos/sdk-ng/blob/master/patches/gcc/10.2.0/...

- k