Hello everyone,
I have a question about the space creation flags provided to the
thread_control syscall. I need to spawn isolated threads and saw that
codezero's libl4 does not provide support for flags other than the
TC_SHARE_SPACE.
What I actually am trying to reproduce would be the equivalent of a fork
system call (I just want to also provide an entry point but that's not
where the difficulty lies). My main problem is that TC_COPY_SPACE seems
to only copy the actual PTE entries into new PMD's. Therefore, the newly
created thread works on a different address space but actually on the
same physical memory. Would the simplest way be to use TC_NEW_SPACE and
then remap/copy all pages from the original space to the new one or is
there a practical way of doing it that I am missing? What is the point
of TC_COPY_SPACE if the resulting spaces work on the same physical pages
at the beginning?
Thank you for taking the time to read this and don't hesitate to point
out any misunderstanding from my part.
Best regards,
François
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