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[/] [or1k/] [trunk/] [rtems-20020807/] [c/] [src/] [libmisc/] [serdbg/] [serdbg.c] - Blame information for rev 1765

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1 1026 ivang
/*===============================================================*\
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| Project: RTEMS remote gdb over serial line                      |
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+-----------------------------------------------------------------+
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| File: serdbg.c                                                  |
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+-----------------------------------------------------------------+
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|                    Copyright (c) 2002 IMD                       |
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|      Ingenieurbuero fuer Microcomputertechnik Th. Doerfler      |
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|               <Thomas.Doerfler@imd-systems.de>                  |
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|                       all rights reserved                       |
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+-----------------------------------------------------------------+
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| this file contains intialization and utility functions to add   |
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| a gdb remote debug stub to an RTEMS system                      |
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|                                                                 |
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+-----------------------------------------------------------------+
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|   date                      history                        ID   |
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| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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| 04.04.02  creation                                         doe  |
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\*===============================================================*/
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/*
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 * serdbg.c,v 1.1 2002/06/27 21:25:13 joel Exp
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 */
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#include <rtems.h>
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#include <stdio.h>
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#include <string.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <serdbg.h>
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/*=========================================================================*\
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| Function:                                                                 |
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\*-------------------------------------------------------------------------*/
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int serdbg_init_dbg
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(
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/*-------------------------------------------------------------------------*\
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| Purpose:                                                                  |
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|   initialize remote gdb session over serial line                          |
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+---------------------------------------------------------------------------+
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| Input Parameters:                                                         |
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\*-------------------------------------------------------------------------*/
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 void
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)
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/*-------------------------------------------------------------------------*\
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| Return Value:                                                             |
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|    rtems_status_code                                                      |
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\*=========================================================================*/
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{
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  static boolean is_initialized = FALSE;
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  rtems_status_code rc = RTEMS_SUCCESSFUL;
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  extern void set_debug_traps(void);
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  extern void breakpoint(void);
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  if (is_initialized) {
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    return RTEMS_SUCCESSFUL;
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  }
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  is_initialized = TRUE;
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  /*
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   * try to open serial device
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   */
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  if (rc == RTEMS_SUCCESSFUL) {
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    if ((serdbg_conf.open_io != NULL) &&
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        (0 > serdbg_conf.open_io(serdbg_conf.devname,serdbg_conf.baudrate))) {
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      fprintf(stderr,
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              "remote_gdb_init: cannot open device %s "
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              "for gdb connection:%s\n",serdbg_conf.devname,strerror(errno));
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      rc = RTEMS_IO_ERROR;
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    }
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  }
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  /*
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   * initialize gdb stub
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   */
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  if (rc == RTEMS_SUCCESSFUL) {
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    set_debug_traps();
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  }
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  /*
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   * now activate gdb stub
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   */
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  if ((rc == RTEMS_SUCCESSFUL) &&
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      !serdbg_conf.skip_init_bkpt) {
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    breakpoint();
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  }
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  /*
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   * return to original function
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   * this may be already unter gdb control
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   */
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  return rc;
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}
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