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/* SPDX-License-Identifier: BSD-2-Clause */
/*
* 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 IMD Ingenieurbuero fuer Microcomputertechnik
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#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;
}
|
