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/*
* RTEMS remote gdb over serial line
*
* This file contains intialization and utility functions to add
* a gdb remote debug stub to an RTEMS system.
*/
/*
* Copyright (c) 2002 Ingenieurbuero fuer Microcomputertechnik Th. Doerfler
* All rights reserved.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems.h>
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <rtems/serdbg.h>
/*=========================================================================*\
| Function: |
\*-------------------------------------------------------------------------*/
int serdbg_init_dbg
(
/*-------------------------------------------------------------------------*\
| Purpose: |
| initialize remote gdb session over serial line |
+---------------------------------------------------------------------------+
| Input Parameters: |
\*-------------------------------------------------------------------------*/
void
)
/*-------------------------------------------------------------------------*\
| Return Value: |
| rtems_status_code |
\*=========================================================================*/
{
static bool is_initialized = false;
rtems_status_code rc = RTEMS_SUCCESSFUL;
if (is_initialized) {
return RTEMS_SUCCESSFUL;
}
is_initialized = true;
/*
* try to open serial device
*/
if (rc == RTEMS_SUCCESSFUL) {
if ((serdbg_conf.open_io != NULL) &&
(0 > serdbg_conf.open_io(serdbg_conf.devname,serdbg_conf.baudrate))) {
fprintf(stderr,
"remote_gdb_init: cannot open device %s "
"for gdb connection:%s\n",serdbg_conf.devname,strerror(errno));
rc = RTEMS_IO_ERROR;
}
}
/*
* initialize gdb stub
*/
if (rc == RTEMS_SUCCESSFUL) {
set_debug_traps();
}
/*
* now activate gdb stub
*/
if ((rc == RTEMS_SUCCESSFUL) &&
!serdbg_conf.skip_init_bkpt) {
breakpoint();
}
/*
* return to original function
* this may be already unter gdb control
*/
return rc;
}
|