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/*===============================================================*\
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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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| 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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