TF-A BL2 Debugging issue

[embeddedbro]

I'm trying to debug TF-A BL2 on my stm32mp157f-dk2 kit 

 

1. Memory card is setup. Partition 1&2 is copied with TF-A

2. I'm expecting that if I connect a debugger, open a debug session with open OCD and gdb , I would be able to connect to the target

3. I would set breakpoint at entry point of BL2 and reset the target by debugger.

4. After reset I would be able to halt the CPU at entry point and then I go on with debugging..

 

Is this approach valid?

Or it's not possible to debug TF-A with this method? 

 

I tried it and I find problems: 

1. I can put breakpoint on bl2_main but it never hits.

2. I can't reset and get the connection back by using stm32cubeide 

3. Can't access the address 0x2ffcxxxx

 

Can someone shed light on this topic?

 

[Olivier GALLIEN]

Hi @embeddedbro 

 

Did you read How to debug TF-A BL2 - stm32mpu ? 

 

Olivier