Hi,
Currently TF-M tests or the reference NS app don't set the MSPLIM, but I think that it wouldn't be a big change to implement that.
You could use CMSIS-CORE and in particular __set_MSPLIM(uint32_t MainStackPtrLimit), where the value of MainStackPtrLimit could be platform-dependent. You could call this function from the NS main, before triggering the test threads. CMSIS-CORE reference is here: Core Register Access (keil.com)https://www.keil.com/pack/doc/CMSIS/Core/html/group__Core__Register__gr.html#ga6809a07c5cb7410e361f3fba57f72172
Thanks, Antonio
From: Andersson, Joakim via TF-M tf-m@lists.trustedfirmware.org Sent: Wednesday, October 5, 2022 08:36 To: Swarowsky, Markus Markus.Swarowsky@nordicsemi.no; tf-m@lists.trustedfirmware.org Subject: [TF-M] Re: Enable stack protection in the regression tests
Can anyone confirm or deny if enabling stack protection in the TF-M non-secure application is possible?
-Joakim Andersson
From: Swarowsky, Markus via TF-M <tf-m@lists.trustedfirmware.orgmailto:tf-m@lists.trustedfirmware.org> Sent: torsdag 29. september 2022 16:49 To: tf-m@lists.trustedfirmware.orgmailto:tf-m@lists.trustedfirmware.org Subject: [TF-M] Enable stack protection in the regression tests
Hey,
While trying to debug a crash in the TF-M regression tests, I noticed that the msplim_ns register is set to 0x0, leaving the non-secure application without any stack to protection, sadly I wasn't able to figure out how to enable the stack protection, which would be nice as we suspect that a stack overflow could cause the crash. Therefore, I would be interested if it possible to enable stack protection for the non-secure application of the TF-M regression tests and if so, how?
Thanks for the help
Markus Swarowsky | R & D Engineer M +47 404 66 922 | Trondheim, Norway
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