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Old 10-11-2013, 11:08 AM   #1
jyunker
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Registered: Aug 2009
Posts: 167

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Preloading a *.so file


I am trying to load an *.so library to run a program. I am trying to preload that library: libsheriff.so. I know its path and location.

Here is a printout from the screeen:

Code:
echo $LD_PRELOAD
/home/james/Desktop/libsheriff.so
[james@james Desktop]$ 
[james@james Desktop]$ 
[james@james Desktop]$ 
[james@james Desktop]$ export LD_PRELOAD=/home/james/Desktop/libsheriff.so
[james@james Desktop]$ ldd p_hello
ERROR: ld.so: object '/home/james/Desktop/libsheriff.so' from LD_PRELOAD cannot be preloaded: ignored.
ERROR: ld.so: object '/home/james/Desktop/libsheriff.so' from LD_PRELOAD cannot be preloaded: ignored.
ERROR: ld.so: object '/home/james/Desktop/libsheriff.so' from LD_PRELOAD cannot be preloaded: ignored.
	linux-vdso.so.1 =>  (0x00007fffbefff000)
	libsheriff_detect64.so => /home/james/Desktop/libsheriff_detect64.so (0x00007f67c2810000)
	libdl.so.2 => /lib64/libdl.so.2 (0x0000003375a00000)
	libpthread.so.0 => /lib64/libpthread.so.0 (0x0000003375e00000)
	libc.so.6 => /lib64/libc.so.6 (0x0000003375600000)
	libstdc++.so.6 => /usr/lib64/libstdc++.so.6 (0x0000003380600000)
	libm.so.6 => /lib64/libm.so.6 (0x0000003376200000)
	libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x000000337d200000)
	/lib64/ld-linux-x86-64.so.2 (0x0000003375200000)

When I issue the preload command it goes through with no complaints. However, when I issue
the ldd command I get the output:

ERROR: ld.so: object '/home/james/Desktop/libsheriff.so' from LD_PRELOAD cannot be preloaded: ignored.


I also get it when I issue the env command. I cannot run programs that require the *.so file to be preloaded. Why is this happening since I told it exactly where to find the library?

I gave the path and everything else, the synatx is correct for the command. What is going on?

Any help appreciated. Thnks in advance.


Respectfully,

Newport_j
 
Old 10-12-2013, 01:05 PM   #2
Valery Reznic
ELF Statifier author
 
Registered: Oct 2007
Posts: 676

Rep: Reputation: 137Reputation: 137
I think you are trying to preload 32-bit o into 64-bit process

What command
Code:
file /home/james/Desktop/libsheriff.so
shows?
 
  


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