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Re: [MiNT] Shared libs without MMU resources


I hope you won't mind that I reply to the list.

Standa Opichal wrote:
Hi Guido!

Thanks for the clarifications. Could you, please review the following?

4) .so libs without real sharing (any working gcc target, anyhow

gcc has nothing to do with that. It is the linker, ld, that would produce the shared libraries (.so).

Would need to provide the relocation tables to be appended to the
generated .o/.so/binary files. OS would not feature any sharing, but just
load the whole thing into memory each time is is requested to be linked
together and relocate to a particular physical address (no VM).

I think this is a very good idea.

Would this be really enormous piece of work?

It shouldn't be that much work.

Your idea is to provide dynamic linking, but still keep a private copy of the entire code (text and data) in each processes memory, correct?

Of course, you will not save any memory if you copy the code, but you will still have a lot of advantages. Not only, that you save a lot of recompilation and repackaging after changing a shared library; a lot of software that links modules/plug-ins dynamically (Apache, Perl, ...) would become a lot more usable.


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