[ECOS] Question about Stack usage in eCOS ? Thanks

[Nick Garnett]

"Qiang Huang" <jameshq@liverpool.ac.uk> writes:

> Does the DSR mentioned in the diagram include the Cyg_RealTimeClock::dsr()
> which rtc->tick() will be called inside.

Yes. Plus any others that may have been posted by nested interrupts.

> runs on the interrupt stack?

Yes.

> if so
> when will the stack switch back to the thread stack? how and where does this
> switching from interrupt stack to user thread stack implemented?
> 

The switch back takes place at (5). If the HAL implements this it is
done in a routine named hal_interrupt_stack_call_pending_DSRs in
vectors.S.

-- 
Nick Garnett - eCos Kernel Architect
http://www.eCosCentric.com/


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