Doubts with GDB and GDBSERVER

[Luis Machado]

On 12/10/2012 10:57 AM, John Martin wrote:
>
> Hello,
>
> I have tried to use gdb and gdbserver to debug App but I have a doubts:
>
> In server side:
> gdbserver :12345 ./App
>
> In client side:
>
> GNU gdb (GDB) 7.5
> Copyright (C) 2012 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or
> later<http://gnu.org/licenses/gpl.html>
> This is free software: you are free to change and redistribute it.
> There is NO WARRANTY, to the extent permitted by law. Type "show copying"
> and "show warranty" for details.
> This GDB was configured as "i586-geode-linux-gnu".
> For bug reporting instructions, please see:
> <http://www.gnu.org/software/gdb/bugs/>.
> (gdb) target remote 192.168.1.150:12345
> Remote debugging using 192.168.1.150:12345
> warning: Could not load vsyscall page because no executable was specified
> try using the "file" command first.
> 0xb7fe77e0 in ?? ()
> (gdb) file App
> A program is being debugged already.
> Are you sure you want to change the file? (y or n) y
> App: No existe el fichero o el directorio.
> (gdb)
>
>
> Is it possible to load symbol table App from target remote?
>
> Best regards.
>
>

You need a copy of the binary in the host as well... Try loading the 
symbol file *before* connecting to the remote target too.

Does that work?

Luis