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Cortex-M7 (Armv7-M) Fault Question

Koji K. over 5 years ago

Hi,

I'm debugging my software on Zephyr using gcc. My processor is Cortex-M7(Armv7-M) with PU.

I got UNALIGNED fault as shown below. It looks like independent from CCR setting. So I guess my problem is categorized as "Unaligned LDM, STM, LDRD, and STRD instructions always fault irrespective of the setting of UNALIGN_TRP."

I'm using gcc with -O2 option. This problem intermittently occurred depending on #source files. Does anyone help what gcc options I should use resolve/debug this problem?

Best regards,

Koji

0 42Bastian Schick over 5 years ago

Don't look at gcc, look at your code for bad pointers. Check the exception address, BFAR and MMFAR.
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