Re: Compile problem under Linux Fedora 5

This issue was resolved in just released version 1.7 of ST.

On Apr 14, 2006, at 2:06 PM, Jose Marcio Martins da Cruz wrote:

>
> Hi,
>
> Gene wrote:
>
>> Hmm, I have a sneaky suspicion that they finally made JB_SP a private
>> definition in new version of glibc (2.4). It's still defined  =20
>> internally in
>> sysdeps/i386/jmpbuf-offsets.h
>>
>
> Yes...
>
> I've got another answer from fedora devel list. (Ulrich Drepper =20
> from Red Hat Inc.).
>
> *********************************************************************
>
> Jose Marcio Martins da Cruz wrote:
>
> >> I tried to define myself the value of JB_SP (4 - the same value =20
> found in
> >> Fedora 4 headers), but the application segfaults.
>
>
> That value was never meant to be used by programs.  It was a value
> needed in the implementation and unfortunately it was placed in the
> public header.
>
> This is fixed now.  And for a good reason: you cannot access the =20
> values
> at all anymore today.  The stored values are "encrypted".
>
> You can disable the encryption using the LD_POINTER_GUARD environment
> variable.  Unfortunately the glibc version so far in FC5 has a little
> bug.  The next update will allow you to specify LD_POINTER_GUARD=3D0.
>
> But this is really the wrong solution.  The program should be =20
> rewritten
> to use __builtin_frame_address (see the gcc manual).
>
> -- =E2=9E=A7 Ulrich Drepper =E2=9E=A7 Red Hat, Inc. =E2=9E=A7 444 =
Castro St =E2=9E=A7 =20
> Mountain View, CA =E2=9D=96
>
> *********************************************************************
>
>
> --=20
>   ---------------------------------------------------------------
>   Jose Marcio MARTINS DA CRUZ           Tel. :(33) 01.40.51.93.41
>   Ecole des Mines de Paris              http://j-chkmail.ensmp.fr
>   60, bd Saint Michel                http://www.ensmp.fr/~martins
>   75272 - PARIS CEDEX 06      mailto:[email protected]
>
>



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