Re: PATCH: Don't allow ia64 unwind section to point to section in different files

From: H. J. Lu <>
Date: 2005-05-14 07:58:15
On Fri, May 13, 2005 at 02:46:12PM -0700, H. J. Lu wrote:
> On Fri, May 13, 2005 at 02:05:56PM -0700, David Mosberger wrote:
> > >>>>> On Fri, 13 May 2005 14:01:11 -0700, "H. J. Lu" <> said:
> > 
> >   >> However, there still seems to be a binutils issues here: if this
> >   >> is something binutils cannot properly support, it should issue an
> >   >> error, not silently generate wrong code, no?
> > 
> >   HJ> I will see what I can do.
> > 
> When weak functions are used on ia64, part of the unwind section may
> point to the strong definition in a different file. This will lead to
> wrong unwind info. Basically, on ia64, we have to use comdat to get the
> right unwind info. This patch will check it.

Well, it isn't very useful. The problem is libc.a has many weak
functions and user can override them. My patch will make it impossible
on ia64. I guess we may have to live with the imperfect unwind info
when weak functions are used. The unwinder may have to deal with it.

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Received on Fri May 13 17:59:52 2005

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