1. Add GDB initilization to your target's code:

a) include file:

#include <uart.h>

b) declare this variable:   

extern int BSPConsolePort;

c) To start-up GDB, run this:

 /* Init GDB glue  */

  if(BSPConsolePort != BSP_UART_COM2)
    {
      /*
       * If com2 is not used as console use it for
       * debugging
       */
      i386_stub_glue_init(BSP_UART_COM2);
    }
  else
    {
      /* Otherwise use com1 */
      i386_stub_glue_init(BSP_UART_COM1);
    }

  /* Init GDB stub itself */
  set_debug_traps();

  /*
   * Init GDB break in capability,
   * has to be called after
   * set_debug_traps
   */
  i386_stub_glue_init_breakin();

  /* Put breakpoint in */
  breakpoint();

d) This is all you need to do for the target.

2. Edit cmds: specify path to current directory and device used for debugging
   example of cmds is attached below.  Make sure your paths are correct.
3. type 'make'
4. Boot o-pc386/<test>.exe on target computer, where <test> has the code from step 1. ( I modified and recompiled base_sp as the <test> )
5. run 'i396-rtems-gdb --nx --command=./cmds o-pc386/<test>.coff

=========================== example cmds ==============================
dir /home/cross-19980908/tools/rtems-980923
dir /home/cross-19980908/tools/rtems-980923/aclocal
dir /home/cross-19980908/tools/rtems-980923/c
dir /home/cross-19980908/tools/rtems-980923/c/build-tools
dir /home/cross-19980908/tools/rtems-980923/c/build-tools/os
dir /home/cross-19980908/tools/rtems-980923/c/build-tools/os/msdos
dir /home/cross-19980908/tools/rtems-980923/c/build-tools/scripts
dir /home/cross-19980908/tools/rtems-980923/c/build-tools/src
dir /home/cross-19980908/tools/rtems-980923/c/src
dir /home/cross-19980908/tools/rtems-980923/c/src/exec
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/posix
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/posix/base
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/posix/headers
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/posix/inline
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/posix/macros
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/posix/optman
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/posix/src
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/posix/sys
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/sapi
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/sapi/headers
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/sapi/src
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/sapi/inline
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/sapi/macros
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/sapi/optman
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/rtems
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/rtems/headers
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/rtems/src
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/rtems/inline
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/rtems/macros
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/rtems/optman
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/score
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/score/cpu
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/score/cpu/a29k
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/score/cpu/hppa1.1
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/score/cpu/i386
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/score/cpu/i960
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/score/cpu/m68k
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/score/cpu/mips64orion
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/score/cpu/no_cpu
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/score/cpu/powerpc
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/score/cpu/sh
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/score/cpu/sparc
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/score/cpu/unix
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/score/headers
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/score/inline
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/score/macros
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/score/src
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/score/tools
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/score/tools/generic
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/score/tools/unix
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/score/tools/hppa1.1
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/wrapup
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/wrapup/posix
dir /home/cross-19980908/tools/rtems-980923/c/src/exec/wrapup/rtems
dir /home/cross-19980908/tools/rtems-980923/c/src/lib
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/include
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/include/motorola
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/include/rtems++
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/include/sys
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/include/zilog
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libc
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libbsp
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libbsp/i386
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libbsp/i386/pc386
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libbsp/i386/pc386/clock
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libbsp/i386/pc386/console
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libbsp/i386/pc386/include
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libbsp/i386/pc386/start
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libbsp/i386/pc386/startup
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libbsp/i386/pc386/timer
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libbsp/i386/pc386/tools
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libbsp/i386/pc386/wrapup
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libbsp/i386/shared/comm
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libbsp/i386/shared/pci
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libcpu
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libcpu/hppa1.1
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libcpu/hppa1.1/clock
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libcpu/hppa1.1/include
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libcpu/hppa1.1/milli
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libcpu/hppa1.1/runway
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libcpu/hppa1.1/semaphore
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libcpu/hppa1.1/timer
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libcpu/m68k
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libcpu/m68k/m68040
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libcpu/m68k/m68040/fpsp
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libcpu/mips64orion
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libcpu/mips64orion/clock
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libcpu/mips64orion/include
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libcpu/mips64orion/timer
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libcpu/powerpc
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libcpu/powerpc/ppc403
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libcpu/powerpc/ppc403/clock
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libcpu/powerpc/ppc403/console
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libcpu/powerpc/ppc403/include
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libcpu/powerpc/ppc403/timer
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libcpu/powerpc/ppc403/vectors
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libcpu/sh
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libcpu/sh/sh7032
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libcpu/sh/sh7032/clock
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libcpu/sh/sh7032/null
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libcpu/sh/sh7032/console
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libcpu/sh/sh7032/include
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libcpu/sh/sh7032/timer
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libcpu/sparc
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libcpu/sparc/reg_win
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libnetworking
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libmisc
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libmisc/assoc
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libmisc/cpuuse
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libmisc/error
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libmisc/monitor
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libmisc/rtmonuse
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libmisc/stackchk
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/libmisc/wrapup
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/librtems++
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/start
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/start/a29k
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/start/i960
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/start/m68k
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/start/mips64orion
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/start/sh
dir /home/cross-19980908/tools/rtems-980923/c/src/lib/wrapup
dir /home/cross-19980908/tools/rtems-980923/c/src/tests
dir /home/cross-19980908/tools/rtems-980923/c/src/tests/samples
dir /home/cross-19980908/tools/rtems-980923/c/src/tests/samples/base_sp
set remotebaud 38400
target remote /dev/ttyS1