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Re: Fwd: Mips, -fpie and TLS management
2009/3/17 Daniel Jacobowitz <drow@false.org>:
> On Tue, Mar 17, 2009 at 04:03:45PM +0100, Joel Porquet wrote:
>> 2009/3/17 Daniel Jacobowitz <drow@false.org>:
>> > On Tue, Mar 17, 2009 at 10:26:05AM +0100, Joel Porquet wrote:
>> >> I don't understand how the runtime loader could know that! As far as I
>> >> know, the tls model is not embedded in reloc information.
>> >
>> > Sure it is. ?I suggest you go back to Ulrich Drepper's TLS paper
>> > for more information about the relocations.
>>
>> The only information is whether the module uses a static model. So we
>> are able to distinguish *-dynamic from *-exec models. Nevertheless, I
>> still don't see how the runtime loader can distinguish local-dynamic
>> and global-dynamic: when it goes through the relocations, it only sees
>> *DTPMOD32 which is common for both models.
>
> It's based on the symbol referenced by the relocation.
Problem is how can you find the symbol referenced by the relocation
when the symbol index is null??
Then, should we consider that a null symbol index means that the
module relocation is the DSO itself?