errno, h_errno and _res

errno, h_errno and _res

[Jakub Jelinek]

Hi!

One more thing about these.
Shouldn't we change those 3 even in non-TLS builds from errno@@GLIBC_2.0
to errno@GLIBC_2.0 etc., so that new programs accessing these directly
simply don't link anymore?

	Jakub

Re: errno, h_errno and _res

[Ulrich Drepper]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Jakub Jelinek wrote:

> One more thing about these.
> Shouldn't we change those 3 even in non-TLS builds from errno@@GLIBC_2.0
> to errno@GLIBC_2.0 etc., so that new programs accessing these directly
> simply don't link anymore?

Yes.

- -- 
- --------------.                        ,-.            444 Castro Street
Ulrich Drepper \    ,-----------------'   \ Mountain View, CA 94041 USA
Red Hat         `--' drepper at redhat.com `---------------------------
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.0.7 (GNU/Linux)

iD8DBQE90+nZ2ijCOnn/RHQRAgPQAJ41QAIhaVLMi73rjBKOFAD2z/KpegCdFd6o
IeqiayHTHX8jJDY0AyWdfyw=
=tJzv
-----END PGP SIGNATURE-----

Re: errno, h_errno and _res

[Roland McGrath]

Unless I missed something, I didn't see any rationale about your moving the
TLS symbols to GLIBC_PRIVATE.  

> Shouldn't we change those 3 even in non-TLS builds from errno@@GLIBC_2.0
> to errno@GLIBC_2.0 etc., so that new programs accessing these directly
> simply don't link anymore?

I've done this.  But libpthread.so needs to refer to them, so I will have
to do some kind of funny business to make that work.

Re: errno, h_errno and _res

[Ulrich Drepper]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Roland McGrath wrote:
> Unless I missed something, I didn't see any rationale about your moving the
> TLS symbols to GLIBC_PRIVATE.  

Hasn't been discussed in mail.  Jakub and I had a chat on IRC yesterday.
 Exposing STT_TLS symbols seems unnecessarily risky in the moment. I
want to do some more studying of the effects before we do that.

- -- 
- --------------.                        ,-.            444 Castro Street
Ulrich Drepper \    ,-----------------'   \ Mountain View, CA 94041 USA
Red Hat         `--' drepper at redhat.com `---------------------------
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.0.7 (GNU/Linux)

iD8DBQE91Ay22ijCOnn/RHQRAuv7AJ9NqpKdAIqc3bh5MbYwME/aOZhGKwCeOMJD
MZ3KB7Ac2hE9EKWgKACvwcc=
=O/+S
-----END PGP SIGNATURE-----

Re: errno, h_errno and _res

[Roland McGrath]

> Hasn't been discussed in mail.  Jakub and I had a chat on IRC yesterday.
>  Exposing STT_TLS symbols seems unnecessarily risky in the moment. I
> want to do some more studying of the effects before we do that.

Ok, seems sensible.  We already don't declare the __thread vars in any
installed header, so no program has any business using them.