gdbserver on sh4

[michael]

Hi all,

I crosscompile the gdb server for sh and I have trouble to debug a 
simple application,
using it.

I try with the gdb-6.8

./configure --target=sh4-linux

gdbserver
sh3-linux-gcc is a nptl toolchain

CC=sh3-linux-gcc ./configure --host=sh4-linux

server side

./gdbserver-6.8  192.168.10.156:1234 ./foobar_sample                       
Process ./foobar_sample created; pid = 
817                                     
Listening on port 
1234                                                         
Remote debugging from host 192.168.8.242

client side
GNU gdb 6.8
Copyright (C) 2008 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 "--host=x86_64-unknown-linux-gnu 
--target=sh-linux"...
(gdb) target remote 192.168.10.156:1234
Remote debugging using 192.168.10.156:1234
[New Thread 817]
Got object file from memory but can't read symbols: File format not 
recognized.
0x00000000 in ?? ()

This is how the toolchain is configured
sh3-linux-gcc -v
Using built-in specs.
Target: sh3-linux
Configured with: /home/kpit/fsfsrc/v0701/gcc-4.2-20061205/configure 
--host=i686-linux --target=sh3-linux 
--prefix=/usr/share/gnush4-nofpu_linux_v0701-1 --with-cpu=sh4-nofpu 
--with-sysroot=/usr/share/gnush4-nofpu_linux_v0701-1/sh3-linux/sys-root 
--with-local-prefix=/usr/share/gnush4-nofpu_linux_v0701-1/sh3-linux/sys-root 
--disable-nls --enable-threads --enable-symvers=gnu 
--disable-__cxa_atexit --enable-languages=c,c++ --enable-c99 
--enable-long-long --disable-multilib

(gdb) b main
Breakpoint 1 at 0x4003e6: file main.c, line 23.
(gdb) c
Continuing.

Program received signal SIGTRAP, Trace/breakpoint trap.
0x7b9dedec in ?? ()
(gdb)

Can anybody help to find the problem?

Kind regards
Michael