Re: LD_PRELOAD problem

I make a pardon the binary which I chatr'ed was sqlplus

rgds

On 9/1/06, LS Cheng <exriscer_at_gmail.com> wrote:
>
> Hi all
>
> I have more information, I did a chatr to check differences between
> working server oracle binary and the non working.
>
> I see two differences, in the server which LD_PRELOAD doesnt cause problem
> oracle binary has these two attributes:
>
> explicit unloading disabled
> linkage table protection disabled
>
> Does anyone know how can I change these attributes with chatr?
>
> Cheers
>
>
> On 8/31/06, Tanel Poder <tanel.poder.003_at_mail.ee> wrote:
>
> > LD_PRELOAD allows you to hijack dynamicly loaded library functions. If
> > sqlplus calls function X, then if this function X is exported from your
> > /sbl/xxx.sl then this function X is called from /sbl/xxx.sl even if it
> > exists in some other dll against which the executable is linked (like
> > libclntsh* libraries).
> >
> > Run: nm /sbl/xxx.sl to see which functions may be hijacked there, this
> > could give some more indication what's going on.
> >
> > And of course, the library's word-size has to match word-size of the
> > executable. If the word sizes are different, you have to recompile the
> > library.
> >
> > Tanel.
> >
> > ------------------------------
> > *From:* oracle-l-bounce_at_freelists.org [mailto:
> > oracle-l-bounce_at_freelists.org] *On Behalf Of *LS Cheng
> > *Sent:* Thursday, August 31, 2006 04:45
> >
> > *To:* Jesse, Rich
> > *Cc:* oracle-l
> > *Subject:* Re: LD_PRELOAD problem
> >
> >
> >
> > However when I unset LD_PRELOAD sqlplus works but of course the
> > application specific program fails.
> >
> >
>
>

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