[gentoo-amd64] LD_PRELOAD of 32 bits libs

[gentoo-amd64] LD_PRELOAD of 32 bits libs

[Gustavo Felisberto]

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I'm trying to LD_PRELOAD some 32 bits libs to use with 32 bits apps.
file ./libartsdsp.so.0 ./libartsc.so.0 /lib32/libdl-2.3.5.so
/opt/skype/skype.bin
./libartsdsp.so.0:     ELF 32-bit LSB shared object, Intel 80386,
version 1 (SYSV), not stripped
./libartsc.so.0:       ELF 32-bit LSB shared object, Intel 80386,
version 1 (SYSV), not stripped
/lib32/libdl-2.3.5.so: ELF 32-bit LSB shared object, Intel 80386,
version 1 (SYSV), stripped
/opt/skype/skype.bin:  ELF 32-bit LSB executable, Intel 80386, version 1
(SYSV), for GNU/Linux 2.2.0, dynamically linked (uses shared libs), stripped

These are the libs and the executable, and what happens is:
LD_PRELOAD=./libartsdsp.so.0:./libartsc.so.0:/lib32/libdl-2.3.5.so
/opt/skype/skype.bin
ERROR: ld.so: object './libartsdsp.so.0' from LD_PRELOAD cannot be
preloaded: ignored.
ERROR: ld.so: object './libartsc.so.0' from LD_PRELOAD cannot be
preloaded: ignored.
ERROR: ld.so: object '/lib32/libdl-2.3.5.so' from LD_PRELOAD cannot be
preloaded: ignored.

Any ideas?

-- 
Gustavo Felisberto
(HumpBack)
Web: http://dev.gentoo.org/~humpback
Blog: http://blog.felisberto.net/
------------
It's most certainly GNU/Linux, not Linux. Read more at
http://www.gnu.org/gnu/why-gnu-linux.html .
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[gentoo-amd64] Re: LD_PRELOAD of 32 bits libs

[Duncan]

Gustavo Felisberto posted <4318DEEB.60808@gentoo.org>, excerpted below, 
on Sat, 03 Sep 2005 00:23:23 +0100:

> I'm trying to LD_PRELOAD some 32 bits libs to use with 32 bits apps.
> file ./libartsdsp.so.0 ./libartsc.so.0 /lib32/libdl-2.3.5.so
> /opt/skype/skype.bin
> ./libartsdsp.so.0:     ELF 32-bit LSB shared object, Intel 80386,
> version 1 (SYSV), not stripped
> ./libartsc.so.0:       ELF 32-bit LSB shared object, Intel 80386,
> version 1 (SYSV), not stripped
> /lib32/libdl-2.3.5.so: ELF 32-bit LSB shared object, Intel 80386,
> version 1 (SYSV), stripped
> /opt/skype/skype.bin:  ELF 32-bit LSB executable, Intel 80386, version 1
> (SYSV), for GNU/Linux 2.2.0, dynamically linked (uses shared libs), stripped
> 
> These are the libs and the executable, and what happens is:
> LD_PRELOAD=./libartsdsp.so.0:./libartsc.so.0:/lib32/libdl-2.3.5.so
> /opt/skype/skype.bin
> ERROR: ld.so: object './libartsdsp.so.0' from LD_PRELOAD cannot be
> preloaded: ignored.
> ERROR: ld.so: object './libartsc.so.0' from LD_PRELOAD cannot be
> preloaded: ignored.
> ERROR: ld.so: object '/lib32/libdl-2.3.5.so' from LD_PRELOAD cannot be
> preloaded: ignored.
> 
> Any ideas?

Shot in the dark...  your LD_PRELOAD is using mostly (but not all)
relative paths. What happens if you try all absolute paths?  Might as well
try all relative as well, while you are at it.

-- 
Duncan - List replies preferred.   No HTML msgs.
"Every nonfree program has a lord, a master --
and if you use the program, he is your master."  Richard Stallman in
http://www.linuxdevcenter.com/pub/a/linux/2004/12/22/rms_interview.html


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Re: [gentoo-amd64] LD_PRELOAD of 32 bits libs

[Kevin F. Quinn]

On 3/9/2005 1:23:23, Gustavo Felisberto (humpback@gentoo.org) wrote:
> I'm trying to LD_PRELOAD some 32 bits libs to use with 32 bits apps.
> file ./libartsdsp.so.0 ./libartsc.so.0 /lib32/libdl-2.3.5.so
> /opt/skype/skype.bin
> ../libartsdsp.so.0:     ELF 32-bit LSB shared object, Intel 80386,
> version 1 (SYSV), not stripped
> ../libartsc.so.0:       ELF 32-bit LSB shared object, Intel 80386,
> version 1 (SYSV), not stripped
> /lib32/libdl-2.3.5.so: ELF 32-bit LSB shared object, Intel 80386,
> version 1 (SYSV), stripped
> /opt/skype/skype.bin:  ELF 32-bit LSB executable, Intel 80386, version 1
> (SYSV), for GNU/Linux 2.2.0, dynamically linked (uses shared libs), 
> stripped 
> These are the libs and the executable, and what happens is:
> LD_PRELOAD=./libartsdsp.so.0:./libartsc.so.0:/lib32/libdl-2.3.5.so
> /opt/skype/skype.bin
> ERROR: ld.so: object './libartsdsp.so.0' from LD_PRELOAD cannot be
> preloaded: ignored.
> ERROR: ld.so: object './libartsc.so.0' from LD_PRELOAD cannot be
> preloaded: ignored.
> ERROR: ld.so: object '/lib32/libdl-2.3.5.so' from LD_PRELOAD cannot be
> preloaded: ignored.
> 
> Any ideas?

My guess would be that it can't find other 32-bit libraries that it needs,
like libpthread.so, libc.so and ld-linux.so. Try setting LD_LIBRARY_PATH to /lib32, if that's where they are.  I'm not an amd64 user, but I'd guess /lib32 isn't in ld.so.conf by default.

Kev.



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