_unhandled_exception but nothing in fault analyzer

[debugme]

Hi,

I'm working on a c++ project and encountering the _unhandled_exception error. I'm trying to look cause for this error but fault analyzer in stm32cube ide is showing as No Fault Detected.

I've looked into call stack and observed that "<signal handler called>() at 0xfffffffd" is executed just before the "VectorFC() at vectors.S:1,021 0x80002da".

I'm not sure what signal handler is and hence unable to identify the root cause.

I've tried varying the stack size, but error remains the same.

[Pavel A.]

Values like 0xfffffffd on stack are symptoms of Cortex-M exceptions.

These are hardware exceptions, not C++. There are various exceptions, not only HardFault.

Try to go to the stack frame of the "signal handler" then view in disassembly the location pointed by LR.