[BusyBox] Help! Booting NFS with ARM using shared libraries

[yukwing.li at conexant.com]

Hi Erik,

I have finally figured out why my busybox cannot be loaded dynamically. 
The problem was my cross-built glibc libraies.  When I do readelf on 
libc.2.2.3.so, it says "requesting program interpreter: 
/usr/local/arm/3.2.2//lib/ld-linux.so.s"in stead of "/lib/ld-linux.so.2". 
If I make a symbolic link from my <nfs root>/usr/local/arm/3.2.2/lib to 
<nfs root>/lib, everything will work just fine.

I guess my problem was caused by the way I cross-build the ARM glibc.  I 
use "/usr/local/arm/3.2.2/" as the prefix.  Do you know how I can get 
around this?

Thanks for you help!

Yuk-Wing Li





"Erik Andersen" <andersen at codepoet.org>
04/16/2003 07:18 PM
Please respond to andersen

 
        To:     yukwing.li at conexant.com
        cc:     busybox at busybox.net
        Subject:        Re: [BusyBox] Help! Booting NFS with ARM using shared libraries


On Wed Apr 16, 2003 at 07:00:22PM -0700, yukwing.li at conexant.com wrote:
> Hi Erik,
> 
> Thanks for the info. 
> 
>  My problem is that I am trying to figure out why Busybox cannot start 
> (with the error "init: error while loading shared libraries: libc.so.6: 
> cannot open shared object file") in my ARM platform.  The 'ldd' command 
in 
> my i386 platform is not capable of recognizing ARM or MIPS executables. 
It 
> sounds like I need to find the source of ldd and build an ARM version of 

> it, and then use a static version of Busybox to boot up my ARM platform 
in 
> order to run 'ldd' on the dynamic version of Busybox to see what other 
> libraries are needed.  Is that what are you suggesting?

You could use the uClibc version of 'ldd', or you could use
readelf, i.e.:

$ file ./busybox 
./busybox: ELF 32-bit LSB executable, ARM, version 1 (ARM), for
GNU/Linux 2.0.0, dynamically linked (uses shared libs), stripped

$ readelf -a ./busybox | grep NEEDED
 0x00000001 (NEEDED)                     Shared library: [libc.so.0]

 -Erik

--
Erik B. Andersen             http://codepoet-consulting.com/
--This message was written using 73% post-consumer electrons--



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