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[tcf-dev] Call stack issues when porting to another CPU architecture
  • From: Tobias Klinke <tobias.klinke@xxxxxxxxxxx>
  • Date: Wed, 10 Apr 2024 10:02:01 +0200
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Hi,
I'm working on a port of the TCF agent to another CPU architecture (TriCore Aurix).
In my setup, the TCF agent runs on Windows and is used to debug a program running on the bare-metal target device. Symbols are coming from an ELF file. 

I face some problems with the call stack:
a) In Eclipse debug view I see at most two levels (top frame and one below)
b) The call stack only updates when I hit "suspend". While single stepping only the top frame updates, the second level is frozen. 

My main questions are currently:
1. I haven't yet implemented crawl_stack_frame (I just return 0) as the ELF binary contains debug information and my register definitions contain correct DWARF IDs. Is my understanding correct that even without crawl_stack_frame() the call stack should be complete based on the debug information? 2. Is there something I missed to trigger to cause the call stack to be updated during single stepping?
Any other hints on what to check or what needs to be implemented are also appreciated. 

Best regards,
Tobias Klinke

--
Tobias Klinke
Security Software Engineer

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