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+ Should document this better but essentially a server requests a shared
buffer, and chan then share this buffer to a thread. Freeing the
buffer is done through normal means. MR_SHARED is used for buffers
that are shared, and MR_OWNED tells whoever is freeing that region
that it is allowed to free the physical memory behind the shared
buffer.
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+ Mainly just moving stuff out or arch/riscv/ that should be handled in
common/
+ Prepared separate process stack/call stack for server callbacks, rest
to be implemeted soon ish
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+ Christ, I'm shit at git etiquette
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+ Not used at the moment anywhere, but should come in handy when
emulating stuff like (s)brk and when mapping ELF stuff
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+ In general improved riscv vmem.c
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+ Sensible mappings should help, discard what I wrote in the previous
commit. Nothing works unless I get vmem up and running properly.
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+ Should start to think about how virtual memory should be handled
efficiently, I'm sort of flailing around and not actually doing
anything beneficial. The mapping system I've so far implemented
_works_, but it's not good and I'm not happy with it. I might come
back and fix/improve it, but I think I'll go ahead and do other things for
a while, might give me a better overhead view of what the virtual
memory system should do.
+ TODO: should probably document the memory layout I'm going with at the
moment.
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