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Altera_Forum's avatar
Altera_Forum
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21 years ago

Cannot step into crt0.s

Hi, I am using the ISS (Instruction Set Simulator). I would like to start program execution by stepping through crt0.s. However, the IDE has that option greyed out. I circumvented it by simply ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
21 years ago

Hello Wombat,

The option 'step into' was greyed out in the IDE's 'debug' view, when I had not started program execution yet. The option of stepping into execution is something I knew from the Visual Studio environment, so it just caught my attention that it was not there.

So.. why would anybody step through the nitty-gritty details of crt0.s. The reason is that the first C-statement in my main() routine was not reached. Instead, the ISS bailed out, indicating that a non-initialized value was read. So, I wanted to know where execution flow decided to generate an ISS error instead of reaching main().

I can see now that crt0.s is executed succesfully, and the ISS error is thrown in a strcmp() in the context of system initialization of the timer. Haven't figured out why, yet.

Anyway, my question regarding this issue has been answered so thank you for the replies !

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