[TF-M] Re: Weird behavior of Clang linker

Hi Bohdan,

What is Clang version you are using?

Thanks, Anton

From: Bohdan.Hunko--- via TF-M tf-m@lists.trustedfirmware.org Sent: Monday, December 11, 2023 12:58 PM To: tf-m@lists.trustedfirmware.org Subject: [TF-M] Weird behavior of Clang linker

Hi all,

Our platform uses 4KBs alignment in linker files (as this is the requirement of our protection HW).

For this reasons I have introduced tfm_s_linker_alignments.h.

Everything works fine with GCC but we have a problem with Clang. The problem is that Clang requires LR_CODE to have same alignment as other sections inside of it.

Following are the steps to reproduce the issue:

1. Set TFM_LINKER_DEFAULT_ALIGNMENT to 0x1000 in tfm_s_linker_alignments.h 2. Build AN521 with following command line cmake -S . -B build_an521 -DTFM_PLATFORM=arm/mps2/an521 -DTFM_TOOLCHAIN_FILE=./toolchain_ARMCLANG.cmake

Expected result: Everything works fine

Actual result: Error: L6244E: Load region LR_CODE address (0x10080400) not aligned on a 4096 byte boundary.

This error is weird because there is no explicit alignment assigned to LR_CODE region.

Would appreciate a help on this as it is a blocking issue for us.

Regards, Bohdan Hunko

Cypress Semiconductor Ukraine Engineer CSUKR CSS ICW SW FW Mobile: +38099 50 19 714 Bohdan.Hunko@infineon.commailto:Bohdan.Hunko@infineon.com