[Bug dynamic-link/21265] _dl_runtime_resolve isn't compatible with Intel C++ __regcall calling convention

["fweimer at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=21265

--- Comment #9 from Florian Weimer <fweimer at redhat dot com> ---
(In reply to joseph@codesourcery.com from comment #8)
> On Mon, 20 Mar 2017, fweimer at redhat dot com wrote:
> 
> > > i386 _dl_runtime_resolve preserves EAX, ECX and EDX for regparm:
> > 
> > I think this is mainly for internal glibc use (see the internal_function
> > macro).  I don't think you should read into this that glibc supports a
> > different ABI than what's specified in the psABI supplement.
> 
> As far as I know, anything marked with internal_function should never be 
> called through the PLT.  Are there any such functions that are not also 
> marked with attribute_hidden?

Apart from the functions I added because not knowing about this rule, there is
__libc_pthread_init, which is defined in libc.so.6 and called from
libpthread.so.0.

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