GSoC project: Memory protection (Ticket no: 2904)

[Utkarsh Rai]

On Tue, Mar 23, 2021 at 5:49 PM Rajiv Vaidyanathan <
rajiv.vaidyanathan4 at gmail.com> wrote:

> Dear Utkarsh,
>
> Thank you for providing these links. I would like to know if these pending
> tasks are long enough to take it up as a GSoC project.
>
>
Resolving the issues related to user extension iterators and then making it
compatible with existing testsuites should be a long enough task. You can
also take up the task of thread stack sharing
if this is resolved early.



> Thanks and regards,
> Rajiv
>
> On Tue, 23 Mar 2021 at 16:15, Utkarsh Rai <utkarsh.rai60 at gmail.com> wrote:
>
>>
>>
>> On Mon, Mar 22, 2021 at 9:54 PM Gedare Bloom <gedare at rtems.org> wrote:
>>
>>> Hi Rajiv,
>>>
>>> On Sat, Mar 20, 2021 at 12:40 AM Rajiv Vaidyanathan
>>> <rajiv.vaidyanathan4 at gmail.com> wrote:
>>> >
>>> > Hello RTEMS community,
>>>
>>
>> Hello Rajiv,
>>
>>
>>> >
>>> > I am interested in the ticket: Memory protection. I saw that this
>>> topic has been pursued a few times in GSoC. It would be great if someone
>>> can let me know the current status of this project and guide me about what
>>> are the contributions that can be done this year.
>>> >
>>> Yes, this is a frequently attempted project that slowly makes progress
>>> over time. I think that Utkarsh has gotten somewhat close to a
>>> workable solution, but there were some design flaws in his approach
>>> for task stack protection (mainly, iterating over all the tasks) that
>>> are still lingering.
>>
>>
>> If you want to work on thread stack protection using MMU you can look at
>> this
>> thread
>> <https://lists.rtems.org/pipermail/devel/2020-December/063606.html> for
>> the issues with my solution and possible resolutions to them.
>> You can clone the 'Final-release' branch of this
>> <https://github.com/ur10/rtems> repo to get an idea of the
>> changes/additions that I had done and refer to this blog
>> <https://gsoc2020memoryprotection.blogspot.com/2020/05/what-is-thread-stack-protection-well.html> for
>> a brief description of my idea
>> behind making those changes/additions.
>> Ideally, I would have liked to complete them for myself, this summer, but
>> I am not sure
>> if the time constraints that I have would allow me to pursue this right
>> now.
>>
>>
>>> There could be enough work here to pick up from his progress. The
>>> major issue would be figuring out what  the final state of his code is
>>> in, and to dig in to the design and implementation details to write a
>>> concrete proposal how to bring task stack protection to a production
>>> state. There may be other directions to consider as well, such as
>>> improving the risc-v MMU support perhaps.
>>>
>>> > Thanks and regards,
>>> > Rajiv
>>> > _______________________________________________
>>> > devel mailing list
>>> > devel at rtems.org
>>> > http://lists.rtems.org/mailman/listinfo/devel
>>>
>>
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