[NSWI004] A04

[Georgii Ekserdzhian]

update:
What value in cause indicates that it is indeed an interrupt exception and
not something else?:
cp0_cause_is_interrup_pending is the function that tells you that, but I
don't get 'intr' argument and why the first argument is status but not
cause.(i know it's only a name, but it can be confusing)

Georgii Ekserdzhian


пт, 20 нояб. 2020 г. в 18:27, Georgii Ekserdzhian <gxrjan at gmail.com>:

> Good evening.
> Can you please answer some questions:
> You say in the assignment that handle_exception_general_asm pushes
> exception context on the stack of the currently running thread. But then
> handle_exception_general is called an as a parameter it has a pointer to an
> exception_context. Are these contexts the same? Do I need only "cause"
> register from it? What value in cause indicates that it is indeed an
> interrupt exception and not something else? How can I call a register dump?
> Also:
> We made for testing purposes two threads. thread_1 executes for a bit and
> after quantum interrupt is executed.
> handle_exception_general is executed which calls scheduler_schedule_next
> and we can see the call to the context switch to the second thread, but for
> some reason the execution goes back to handle_exception_general. What can
> be the cause of this? (we pushed our code to our repo in A04 branch in case
> you want to see the code).
>
> Georgii Ekserdzhian
>
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