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Re: [PLUG] ldt_modify and detailed information
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Tobias,
thank you very much. i now know where to start looking for the
information i need. hopefully after reading the the ELF spec, it will be
just the starting point i need to get this done...
-- adam grossman
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> On Tuesday 18 May 2004 13:39, aglist@metashadow.com wrote:
> | but i did not know in depth how it works. that's why i want to look up
> how
> | linux handles/creates the default segments and user created segments. i
> | have more questions like "if i malloc 64M+ of memory, are all the pages
> | automatically created, or does it only create pages and table entries as
> | the memory is accessed."
>
> In Linux, all pages are accounted for at boot time. Pages are then
> assigned or
> deassigned as necessary.
>
> | the same question goes for user created
> | segments. i do not want to use all my swap space on empty pages and
> | really large page directories.
>
> This would be handled via the ELF format in some way. If allowed for by
> the
> ELF specifications, you would include your custom segment in the binary
> somehow and possibly dictate how you would like it to be handled. This may
> require the introduction of new code into libc and/or the kernel to make
> happen properly, however. A good reading of the ELF spec should set you on
> the right track, followed by an investigation of the mm/ subdir in the
> Linux
> kernel sources.
>
> - --
> Tobias DiPasquale
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