RM46L852: Prefetch Entry abort in reserved memory space

After looking at it, this morning, I realized that the problem is memory corruption. 

Hi Gabriel,

Please refer to the FAQ:

https://e2e.ti.com/support/microcontrollers/arm-based-microcontrollers-group/arm-based-microcontrollers/f/arm-based-microcontrollers-forum/1029488/faq-tms570lc4357-troubleshooting-the-abort-exceptions-on-hercules-devices/3805820?tisearch=e2e-sitesearch&keymatch=Troubleshooting%2520Abort%2520Exceptions%2520AND%2520FAQ#3805820

Did you initialize the SRAM using memoryInit(0x1U)? 

Did you perform the PBIST to SRAM using pbistRun(0x00300020U, (uint32)PBIST_March13N_SP)?

Hi QJ,

Thanks to your helpful FAQ I manage to "resolve" my prefetch entry problem.

I'm now stuck on a data abort inside __vla_dealloc.




How is this possible? 
I would understand a data abort in a vla alloc; but dealloc is completely strange to me.

I've tried to understand the allocator's internals but without success.

How can a deallocation raise a data abort?
Is there a document so I can understand how the vla malloc works? I want to tweak the heap size without using the "trial-an-error" method.

I'm using the HalCoGen generate code.
inside the sys_startup, I can see that memory is init properly and the pbistRun is called.

What is the value of data fault status register (DFSR) and R14_ABT?

DFSR: 0x0000 040
To my understanding, the Fault status is b'11001, which implies parity/ECC error

R14_ABT: 0x0002 AC84

Which points to sys_selftest.c



How do I trigger this fault
Starting SEGGER SystemView.
This is weird, because the system has been started for a while (more than 5 sec) 

Thanks for your support!

DFSR: 0x0000 040 --> MPU background fault?