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From: "adhemerval.zanella at linaro dot org"
 <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug dynamic-link/30186] RTLD_DEEPBIND interacts badly with
 LD_PRELOAD
Date: Mon, 06 Mar 2023 16:17:25 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D30186

Adhemerval Zanella <adhemerval.zanella at linaro dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |adhemerval.zanella at lina=
ro dot o
                   |                            |rg

--- Comment #1 from Adhemerval Zanella <adhemerval.zanella at linaro dot or=
g> ---
IMHO, the main issue is not clear how LD_PRELOAD should work with
RTLD_DEEPBIND: should LD_PRELOAD act as another DT_NEEDED library linked
against the binary (although with high priority as it was first in static
linking order) or should it be handled differently in the search namespace
(where RTLD_DEEPBIND always takes it in consideration).

As Florian has put on https://sourceware.org/bugzilla/show_bug.cgi?id=3D255=
33#c8
I don't think we can change LD_PRELOAD semantic without the potential break=
age
on a lot of RTLD_DEEPBIND usages.

One possibility is to maybe another env. var to specify a different preload
mode or add another flag on dlopen; both which I am not really fond of. Flo=
rian
might have another idea.

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