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SubjectRe: 2.3.30pre1 syscall w/6 args support?

I always found this aproach to be sensible and sound...
Best of Both Worlds.


"Theodore Y. Ts'o" wrote:
> DEC OSF/1 does this. Libraries have pre-assigned address ranges, which
> are configured on a per-machine basis using a file in /etc. (Obviously,
> the system gets shipped with a default address range which most machines
> use, but it's not a requirement in the architecture).
>
> For each process, when a shared library is loaded, if the default
> address range is available, it gets used, and the text pages get mapped
> in and shared, and there's no nead to do any run-time linking. If for
> some reason that default address range is not available, then new memory
> pages have to get allocated, and then library has to be relocated for
> that new location. Of course, there are nice tools available for
> automatically building the library VM address assignment file based on
> what libraries are available on that machine, ala ldconfig.
>
> It also means that you don't have to pay the cost of using PIC code,
> and still get the benefits of using shared libraries. After the pain of
> using globally allocated shared library address ranges for a.out shared
> libraries, I think some folks came to the conclusion that pre-allocated
> address assignment was automatically a bad thing. But using locally
> pre-allocated address assignment, ala OSF/1, I think is a good idea, and
> something that we might want to consider.
>
> - Ted
>
> -
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