FreeLists / oracle-l / Re: LD_PRELOAD problem

["LS Cheng" <exriscer@xxxxxxxxx>]

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@xxxxxxx> 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@xxxxxxxxxxxxx [mailto:
> oracle-l-bounce@xxxxxxxxxxxxx] *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.