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Date: Tue, 15 Jan 2013 12:24:06 +0100
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: rebase segfault
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On Jan 15 11:36, marco atzeri wrote:
> On 1/15/2013 11:07 AM, Corinna Vinschen wrote:
> >On Jan 15 09:43, marco atzeri wrote:
> >>rebase is segfaulting on two dlls of new package
> >>
> >>postgresql-contrib-9.2.2-1
> >>
> >>Full packages here
> >>http://matzeri.altervista.org/cygwin-1.7/postgresql/
> >>
> >>Just the two dll's here:
> >>http://matzeri.altervista.org/works/rebase/
> >>
> >>for i in *.dll; do echo $i ; rebase -O  $i ; done
> >>
> >>dict_snowball.dll
> >>Segmentation fault (core dumped)
> >>
> >>ltree.dll
> >>Segmentation fault (core dumped)
> >
> >I don't know exactly what's going on here, but there's a common
> >factor:
> > [...]
> >Both DLLs have a section .gnu_deb, whatever that one is good for.
> >Rebase crashes both times when trying to relocate this .gnu_deb section.
> >As you can see, the .gnu_deb section is pretty small, only 28 resp. 20
> >bytes.  What happens is that the relocation information for the .gnu_deb
> >section appears to be too big.  In case of dict_snowball.dll, the reloc
> >info covers 44 relocation entries.  The segfault occurs as soon as one
> >entry translates into a memory address which is beyond the committed
> >area of the file memory map.
> >[...]
> 
> It seems the result of the .dbg creation, that trunks
> wrongly the sections.
> [...]
> for what I can see a dll with debug symbols
> should have a .gnu_debuglink sections:

Right.  Something's scrambled.  AFAIK, the .gnu_debuglink is not
relocatable, it only contains a path.  ".gnu_deb" appears to be
a result of using only the fixed 8 bytes of the section name.
Yaakov, do you have any idea what's going on here?


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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