On 2014-11-27 18:39, Kai Nacke wrote:

> Here are the dirty details:
>
> On Linux and FreeBSD, the module id and size of the TLS section is found
> in the ELF structure dl_phdr_info. The module id is converted to a
> pointer to the first byte of the TLS section for every thread:
>
>      auto ti = tls_index(moduleId, 0);
>      return (__tls_get_addr(&ti)-TLS_DTV_OFFSET)[0 .. sz];
>
> (sz is the size)
>
> Solaris does not have the dl_phdr_info.dlpi_tls_modid field therefore
> this methods breaks.
>
> But I think I found the solution. After reading the link you posted the
> tenth time I realized the following sentence:
>
> "The static TLS arena associated with the calculated TLS size tlssizeS,
> is placed immediately preceding the thread pointer tpt. Accesses to this
> TLS data is based off of subtractions from tpt."
>
> The thread pointer is fs:0 or gs:0 on Intel and r7 on Sparc. The size of
> the TLS data is found in the ELF header as before. I simply need to do
> the rounding as documented in the chapter and then I can calculate the
> required pointer.
>
> Great!!!

I don't really understand this but it's great if you found a solution.

-- 
/Jacob Carlborg