[Bug d/91628] libdruntime uses glibc internal symbol on s390

[ibuclaw at gdcproject dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91628

--- Comment #5 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
(In reply to Florian Weimer from comment #4)
> (In reply to Iain Buclaw from comment #3)
> > The use of the function is for the garbage collector to be able to scan
> > native TLS data.
> > 
> > The logic of said function pretty much matches what the glibc macro
> > __TLS_GET_ADDR is doing.
> 
> But you can use __tls_get_addr on other architectures, right?
> 

That is correct.  I'll link the offending code for reference.

http://gcc.gnu.org/git/?p=gcc.git;a=blob;f=libphobos/libdruntime/gcc/sections/elf_shared.d;h=7f9036bf5052861960f8a1d4a20838437c5c519c;hb=refs/heads/trunk#l1030


> I think for s390 and s390x, you should implement you own version of
> __tls_get_addr (under a different/hidden name, of course) which is based on
> __tls_get_offset, which is the official interface for this.

Would it be possible to infer the base address of the TLS range doing that
though?