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Re: porting glibc on top of another elf loader
On Tue, Jan 27, 2009 at 4:41 AM, Mathieu Lacage
<mathieu.lacage@gmail.com> wrote:
> On Tue, Jan 20, 2009 at 12:58 PM, Mathieu Lacage
> <mathieu.lacage@gmail.com> wrote:
>> loader tls support. I spent a good while reading the glibc elf loader
>> code and I am curious about its tls data structures. Specifically, I
>> wonder why the loader keeps track of all tls block information in a
>> specific data structure (dtv_slotinfo_list) when it could much more
>> simply move all this information (module index, generation, in each
>> struct link_map. Are there performance considerations which lead to
>> this decision ?
>
> For the record, and in the interest of anyone else who might be
> browsing this piece of code, I believe that, indeed, yes,
> dtv_slotinfo_list fully duplicates other information but it is a damn
> convenient way to get access to information needed during the loader's
> job. i.e., it is really useful to be able to find really quickly holes
> in the module index allocation.
Mathieu,
Please feel free to add anything to the glibc wiki that you think
might help other developers.
http://sourceware.org/glibc/wiki/HomePage
Cheers,
Carlos.