Re: [Ltib] On-target debugging

[Stuart Hughes]

Hi Vadim,

I'm not sure.  The only obvious questions are:

1/ Are you using the gdb in <ltib_proj>/bin
2/ Can you run this on it's own and get something sane from it (run version)
3/ Are all the parts of glibc on the target from the same origin (the 
toolchain normally made by base_libs).
4/ Is the executable on your host the actual one made by LTIB (i.e. from 
rpm/BUILD/xxx/....
5/ Make sure you're not using an executable from rpm/BUILD/xxxx/ that is 
 linking using the local .la files, these will pull in the wrong 
libraries from /usr/lib (maybe).  You need to get a fully linked final 
executable that is not stripped.  You can if necessary do this by 
putting this at the top of your .spec file making the package:

%define __os_install_post %{nil}

Regards, Stuart


Vadim Lebedev wrote:
> While following the instructions:
>
> I'm getting follwing:
> on the target
> gdbserver :1234  /usr/bin/linphonec -d 6  -D
> Process /usr/bin/linphonec created; pid = 1008
> Listening on port 1234
> Remote debugging from host 192.168.10.85
> gdb: error initializing thread_db library: version mismatch between
> libthread_db and libpthread
> gdb: error initializing thread_db library: version mismatch between
> libthread_db and libpthread
> gdb: error initializing thread_db library: version mismatch between
> libthread_db and libpthread
> gdb: error initializing thread_db library: version mismatch between
> libthread_db and libpthread
> gdb: error initializing thread_db library: version mismatch between
> libthread_db and libpthread
> gdb: error initializing thread_db library: version mismatch between
> libthread_db and libpthread
> gdb: error initializing thread_db library: version mismatch between
> libthread_db and libpthread
> gdb: error initializing thread_db library: version mismatch between
> libthread_db and libpthread
> gdb: error initializing thread_db library: version mismatch between
> libthread_db and libpthread
> gdb: error initializing thread_db library: version mismatch between
> libthread_db and libpthread
> gdb: error initializing thread_db library: version mismatch between
> libthread_db and libpthread
> ============================
>
> on the host:
>
> path ~/castel-gip/rootfs                                              
> Executable and object file path:
> /home/vadim/castel-gip/rootfs:/home/vadim/tortoisehg-dev/contrib:/home/vadim/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games                                                                                        
>
> (reverse-i-search)`t': path
> ~/castel-gip/rooQuit                                                                                        
>
> (gdb) b
> main                                                                                                                            
>
> Breakpoint 1 at 0xb200: file linphonec.c, line
> 533.                                                                                     
>
> (gdb)
> cont                                                                                                                              
>
> Continuing.                                                                                                                             
>
> Error while mapping shared library
> sections:                                                                                            
>
> /usr/lib/liblinphone.so.3: No such file or
> directory.                                                                                   
>
> warning: .dynamic section for "/usr/lib/libeXosip2.so.4" is not at the
> expected address (wrong library or version mismatch?)            
> warning: .dynamic section for "/usr/lib/libmediastreamer.so.0" is not at
> the expected address (wrong library or version mismatch?)      
> Error while mapping shared library
> sections:                                                                                            
>
> /usr/lib/libortp.so.8: No such file or
> directory.                                                                                       
>
> warning: .dynamic section for "/usr/lib/libasound.so.2" is not at the
> expected address (wrong library or version mismatch?)             
> warning: .dynamic section for "/usr/lib/libspeexdsp.so.1" is not at the
> expected address (wrong library or version mismatch?)           
> warning: .dynamic section for "/usr/lib/libavcodec.so.51" is not at the
> expected address (wrong library or version mismatch?)           
> warning: .dynamic section for "/usr/lib/libavutil.so.49" is not at the
> expected address (wrong library or version mismatch?)            
> warning: .dynamic section for "/usr/lib/libSDL-1.2.so.0" is not at the
> expected address (wrong library or version mismatch?)
> warning: .dynamic section for "/lib/librt.so.1" is not at the expected
> address (wrong library or version mismatch?)
> warning: .dynamic section for "/lib/libdl.so.2" is not at the expected
> address (wrong library or version mismatch?)
> warning: .dynamic section for "/lib/libpthread.so.0" is not at the
> expected address (wrong library or version mismatch?)
> warning: .dynamic section for "/lib/libm.so.6" is not at the expected
> address (wrong library or version mismatch?)
> warning: .dynamic section for "/usr/lib/libspeex.so.1" is not at the
> expected address (wrong library or version mismatch?)
> warning: .dynamic section for "/usr/lib/libosipparser2.so.3" is not at
> the expected address (wrong library or version mismatch?)
> warning: .dynamic section for "/usr/lib/libosip2.so.3" is not at the
> expected address (wrong library or version mismatch?)
> warning: .dynamic section for "/lib/libc.so.6" is not at the expected
> address (wrong library or version mismatch?)
> warning: .dynamic section for "/lib/libnsl.so.1" is not at the expected
> address (wrong library or version mismatch?)
> Error while mapping shared library sections:
> /lib/libssl.so.0.9.8: No such file or directory.
> warning: .dynamic section for "/lib/libresolv.so.2" is not at the
> expected address (wrong library or version mismatch?)
> Error while mapping shared library sections:
> /lib/libstdc++.so.6: No such file or directory.
> warning: .dynamic section for "/lib/libgcc_s.so.1" is not at the
> expected address (wrong library or version mismatch?)
> Error while mapping shared library sections:
> /usr/lib/libvpu.so: No such file or directory.
> Error while mapping shared library sections:
> /usr/lib/libdirectfb-1.1.so.0: No such file or directory.
> Error while mapping shared library sections:
> /usr/lib/libfusion-1.1.so.0: No such file or directory.
> Error while mapping shared library sections:
> /usr/lib/libdirect-1.1.so.0: No such file or directory.
> warning: .dynamic section for "/usr/lib/libts-0.0.so.0" is not at the
> expected address (wrong library or version mismatch?)
> Error while mapping shared library sections:
> /lib/ld-linux.so.3: No such file or directory.
> Error while mapping shared library sections:
> /lib/libcrypto.so.0.9.8: No such file or directory.
> warning: .dynamic section for "/usr/lib/libz.so.1" is not at the
> expected address (wrong library or version mismatch?)
>
> Breakpoint 1, main (argc=4, argv=0xbefe8e44) at linphonec.c:533
> 533             if (! linphonec_init(argc, argv) ) exit(EXIT_FAILURE);
> (gdb)
> ==================
>
> As the code i'm trying to debug is inside the DLL's (liblinphone.so  and
> libavcodec.so)  i'm stuck now....
>
>
>
> Any advice
> Thanks
>
>
>
>
>
>
>
>
>
>
>
>
>
> Stuart Hughes wrote:
> > Hi Vadim,
> >
> > I've not tried on the i.mx27, but the method for building is the same.
> >
> > $ ./ltib -m config
> >
> > find the entry for gdb (hint use the 's' search).  Enable it, it
> > should set as below (--- means selected by something else).
> >
> >
> >         [*] gdb
> >         [ ]   gdb to run natively on the target
> >         [*]   cross gdb (runs on build machine)
> >         [ ]     XML support
> >         ---   gdbserver to run natively on the target
> >
> > $ ./ltib
> >
> > When it's finished you'll have gdbserver on the target.  You can start
> > this with: gdbserver :1235 /some/thing/to/debug
> >
> > On the build machine the cross-gdb is in the bin directory.  You can
> > run this on it's own or wrap with a GUI gdb (such as ddd --debugger
> > bin/gdb <unstripped_target>
> >
> > Once the client gdb is running you run:
> >
> > gdb> b main
> > gdb> target remote _IPADDR_:1234
> > gdb> cont
> >
> >
> > Regards, Stuart
> >
> >
> > Vadim Lebedev wrote:
> > > Hello,
> > >
> > > Folks can somebdoy share his experience with debugging on the target (in
> > > my case it's a Freescale i.mx27)
> > >
> > > How do you build the gdbserver for the target?
> > > and how do you build a gdb running on host and connecting to the target?
> > >
> > > Thanks
> > > Vadim
> > >
> > >
> > >
> > > _______________________________________________
> > > LTIB home page: http://ltib.org
> > >
> > > Ltib mailing list
> > > address@hidden
> > > http://lists.nongnu.org/mailman/listinfo/ltib
>
>
>
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