So I got access to a IAR manual and the issue is in fact that with our recent refactoring the IAR FIH_LABEL uses the “::” instead of a single “:” . That will make it a public symbol and will lead to clashes. We are going to discuss internally to double check if that was done intentionally and provide a patch early next week.

Thanks,
Antonio

Sent from Outlook for Mac

From: Antonio De Angelis via TF-M <tf-m@lists.trustedfirmware.org>
Date: Friday, 14 November 2025 at 15:15
To: Bohdan.Hunko@infineon.com <Bohdan.Hunko@infineon.com>, tf-m@lists.trustedfirmware.org <tf-m@lists.trustedfirmware.org>
Cc: Hennadiy.Kytsun@infineon.com <Hennadiy.Kytsun@infineon.com>, nd <nd@arm.com>
Subject: [TF-M] Re: IAR + FIH issue

So just to clarify, you might need to explicitly make the symbol local, so the macro would have to be modified to have something like:

“FIH_LABEL_ …” to “LOCAL FIH_LABEL_ ...\n FIH_LABEL_ ...”

Given that the label itself is computed attaching line and cnt, it looks like quite ugly eventually…

Thanks,

Antonio


Sent from Outlook for Mac

From: Antonio De Angelis via TF-M <tf-m@lists.trustedfirmware.org>
Date: Friday, 14 November 2025 at 15:09
To: Bohdan.Hunko@infineon.com <Bohdan.Hunko@infineon.com>, tf-m@lists.trustedfirmware.org <tf-m@lists.trustedfirmware.org>
Cc: Hennadiy.Kytsun@infineon.com <Hennadiy.Kytsun@infineon.com>, nd <nd@arm.com>
Subject: [TF-M] Re: IAR + FIH issue

Hi Bohdan,

I don’t have access to a IAR compiler, it seems it might require to change this line:

https://git.trustedfirmware.org/plugins/gitiles/TF-M/trusted-firmware-m/+/refs/heads/main/lib/fih/inc/fih.h#109

To prefix “FIH_LABEL …" with "LOCAL FIH_LABEL …"

Can you give it a try if possible and let me know?

Thanks,
Antonio

Sent from Outlook for Mac

From: Bohdan.Hunko@infineon.com <Bohdan.Hunko@infineon.com>
Date: Friday, 14 November 2025 at 13:37
To: Antonio De Angelis <Antonio.DeAngelis@arm.com>, tf-m@lists.trustedfirmware.org <tf-m@lists.trustedfirmware.org>
Cc: Hennadiy.Kytsun@infineon.com <Hennadiy.Kytsun@infineon.com>, nd <nd@arm.com>
Subject: RE: IAR + FIH issue

Hi Antonio,

 

We have this commit in our tee, but it does not solve the issue I described.

 

FYI – that commit is helpful as it solves other compile issues, but not the one I reported.

 

 

Regards,

Bohdan Hunko

 

Cypress Semiconductor Ukraine

Engineer

CSUKR CSS ICW SW FW

Mobile: +38099 50 19 714
Bohdan.Hunko@infineon.com

 

 

From: Antonio De Angelis <Antonio.DeAngelis@arm.com>
Sent: Friday, 14 November 2025 15:23
To: Hunko Bohdan (CSS ICW SW INT BFS SFW) <Bohdan.Hunko@infineon.com>; tf-m@lists.trustedfirmware.org
Cc: Kytsun Hennadiy (CSS ICW SW INT BFS SFW) <Hennadiy.Kytsun@infineon.com>; nd <nd@arm.com>
Subject: Re: IAR + FIH issue

 

Caution: This e-mail originated outside Infineon Technologies. Please be cautious when sharing information or opening attachments especially from unknown senders. Refer to our intranet guide to help you identify Phishing email.

 

Hi Bohdan, 

 

Does this help?

 

https://review.trustedfirmware.org/c/TF-M/trusted-firmware-m/+/44258

 

Thanks,

Antonio

 

Sent from Outlook for Mac

From: Bohdan.Hunko--- via TF-M <tf-m@lists.trustedfirmware.org>
Date: Friday, 14 November 2025 at 12:43
To: tf-m@lists.trustedfirmware.org <tf-m@lists.trustedfirmware.org>
Cc: Hennadiy.Kytsun@infineon.com <Hennadiy.Kytsun@infineon.com>
Subject: [TF-M] IAR + FIH issue

Hi all,

 

I am trying to build TFM with IAR with TFM_FIH_PROFILE=HIGH and I am facing the issue with the FIH labels.

 

I see following errors:

[ 98%] Linking C executable ../bin/tfm_s.axf

Error[Li006]: duplicate definitions for "FIH_LABEL_FIH_CALL_END_46_1"; in

          "main.o(libtfm_spm.a)", and "tfm_hal_platform.o(libtfm_spm.a)"

Error[Li006]: duplicate definitions for "FIH_LABEL_FIH_CALL_START_46_1"; in

          "main.o(libtfm_spm.a)", and "tfm_hal_platform.o(libtfm_spm.a)"

Error[Li006]: duplicate definitions for "FIH_LABEL_FIH_CALL_END_35_0"; in

          "tfm_hal_platform.o(libtfm_spm.a)", and

          "platform_svc_handler.o(libtfm_spm.a)"

Error[Li006]: duplicate definitions for "FIH_LABEL_FIH_CALL_START_35_0"; in

          "tfm_hal_platform.o(libtfm_spm.a)", and

          "platform_svc_handler.o(libtfm_spm.a)"

 

I did some investigations and I believe I know the root cause:

            Looks like __COUNTER__ for IAR is unique only for a translation unit (.c file) – thus when 2 files have FIH call in same line with the same number of FIH calls before – it creates a label which overlaps with labels in other file.

 

For example tfm_hal_platform.c in our case has first FIH CALL in line 46 (which creates label FIH_LABEL_FIH_CALL_END_46_1) but main.c in our code also has first FIH CALL in line 46 which also results in FIH_LABEL_FIH_CALL_END_46_1 label.

 

 

The question is – how can we solve this issue? Any ideas I can try?

 

 

Regards,

Bohdan Hunko

 

Cypress Semiconductor Ukraine

Engineer

CSUKR CSS ICW SW FW

Mobile: +38099 50 19 714
Bohdan.Hunko@infineon.com