1999-04-16 09:35:26 +08:00
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/* Generic serial interface routines
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Copyright 1992, 1993, 1996, 1997 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include <ctype.h>
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#include "serial.h"
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#include "gdb_string.h"
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#include "gdbcmd.h"
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1999-05-26 02:09:09 +08:00
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extern void _initialize_serial PARAMS ((void));
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1999-04-16 09:35:26 +08:00
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/* Linked list of serial I/O handlers */
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static struct serial_ops *serial_ops_list = NULL;
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/* This is the last serial stream opened. Used by connect command. */
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static serial_t last_serial_opened = NULL;
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/* Pointer to list of scb's. */
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static serial_t scb_base;
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/* Non-NULL gives filename which contains a recording of the remote session,
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suitable for playback by gdbserver. */
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static char *serial_logfile = NULL;
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static GDB_FILE *serial_logfp = NULL;
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static struct serial_ops *serial_interface_lookup PARAMS ((char *));
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static void serial_logchar PARAMS ((int, int, int));
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static char logbase_hex[] = "hex";
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static char logbase_octal[] = "octal";
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static char logbase_ascii[] = "ascii";
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static char *logbase_enums[] = {logbase_hex, logbase_octal, logbase_ascii, NULL};
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static char *serial_logbase = logbase_ascii;
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static int serial_current_type = 0;
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/* Log char CH of type CHTYPE, with TIMEOUT */
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/* Define bogus char to represent a BREAK. Should be careful to choose a value
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that can't be confused with a normal char, or an error code. */
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#define SERIAL_BREAK 1235
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static void
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serial_logchar (ch_type, ch, timeout)
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int ch_type;
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int ch;
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int timeout;
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{
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if (ch_type != serial_current_type)
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{
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fprintf_unfiltered (serial_logfp, "\n%c ", ch_type);
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serial_current_type = ch_type;
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}
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if (serial_logbase != logbase_ascii)
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fputc_unfiltered (' ', serial_logfp);
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switch (ch)
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{
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case SERIAL_TIMEOUT:
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fprintf_unfiltered (serial_logfp, "<Timeout: %d seconds>", timeout);
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return;
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case SERIAL_ERROR:
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fprintf_unfiltered (serial_logfp, "<Error: %s>", safe_strerror (errno));
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return;
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case SERIAL_EOF:
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fputs_unfiltered ("<Eof>", serial_logfp);
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return;
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case SERIAL_BREAK:
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fputs_unfiltered ("<Break>", serial_logfp);
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return;
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default:
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if (serial_logbase == logbase_hex)
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fprintf_unfiltered (serial_logfp, "%02x", ch & 0xff);
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else if (serial_logbase == logbase_octal)
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fprintf_unfiltered (serial_logfp, "%03o", ch & 0xff);
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else
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switch (ch)
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{
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case '\\': fputs_unfiltered ("\\\\", serial_logfp); break;
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case '\b': fputs_unfiltered ("\\b", serial_logfp); break;
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case '\f': fputs_unfiltered ("\\f", serial_logfp); break;
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case '\n': fputs_unfiltered ("\\n", serial_logfp); break;
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case '\r': fputs_unfiltered ("\\r", serial_logfp); break;
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case '\t': fputs_unfiltered ("\\t", serial_logfp); break;
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case '\v': fputs_unfiltered ("\\v", serial_logfp); break;
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default: fprintf_unfiltered (serial_logfp, isprint (ch) ? "%c" : "\\x%02x", ch & 0xFF); break;
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}
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}
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}
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void
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serial_log_command (cmd)
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const char *cmd;
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{
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if (!serial_logfp)
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return;
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serial_current_type = 'c';
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fputs_unfiltered ("\nc ", serial_logfp);
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fputs_unfiltered (cmd, serial_logfp);
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/* Make sure that the log file is as up-to-date as possible,
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in case we are getting ready to dump core or something. */
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gdb_flush (serial_logfp);
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}
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int
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serial_write (scb, str, len)
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serial_t scb;
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const char *str;
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int len;
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{
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if (serial_logfp != NULL)
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{
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int count;
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for (count = 0; count < len; count++)
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serial_logchar ('w', str[count] & 0xff, 0);
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/* Make sure that the log file is as up-to-date as possible,
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in case we are getting ready to dump core or something. */
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gdb_flush (serial_logfp);
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}
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return (scb -> ops -> write (scb, str, len));
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}
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int
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serial_readchar (scb, timeout)
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serial_t scb;
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int timeout;
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{
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int ch;
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ch = scb -> ops -> readchar (scb, timeout);
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if (serial_logfp != NULL)
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{
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serial_logchar ('r', ch, timeout);
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/* Make sure that the log file is as up-to-date as possible,
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in case we are getting ready to dump core or something. */
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gdb_flush (serial_logfp);
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}
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return (ch);
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}
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int
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serial_send_break (scb)
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serial_t scb;
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{
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if (serial_logfp != NULL)
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serial_logchar ('w', SERIAL_BREAK, 0);
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return (scb -> ops -> send_break (scb));
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}
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static struct serial_ops *
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serial_interface_lookup (name)
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char *name;
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{
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struct serial_ops *ops;
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for (ops = serial_ops_list; ops; ops = ops->next)
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if (strcmp (name, ops->name) == 0)
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return ops;
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return NULL;
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}
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void
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serial_add_interface(optable)
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struct serial_ops *optable;
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{
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optable->next = serial_ops_list;
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serial_ops_list = optable;
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}
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/* Open up a device or a network socket, depending upon the syntax of NAME. */
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serial_t
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serial_open (name)
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const char *name;
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{
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serial_t scb;
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struct serial_ops *ops;
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for (scb = scb_base; scb; scb = scb->next)
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if (scb->name && strcmp (scb->name, name) == 0)
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{
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scb->refcnt++;
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return scb;
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}
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if (strcmp (name, "ocd") == 0)
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ops = serial_interface_lookup ("ocd");
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else if (strcmp (name, "pc") == 0)
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ops = serial_interface_lookup ("pc");
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else if (strchr (name, ':'))
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ops = serial_interface_lookup ("tcp");
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else if (strncmp (name, "lpt", 3) == 0)
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ops = serial_interface_lookup ("parallel");
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else
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ops = serial_interface_lookup ("hardwire");
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if (!ops)
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return NULL;
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scb = (serial_t)xmalloc (sizeof (struct _serial_t));
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scb->ops = ops;
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scb->bufcnt = 0;
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scb->bufp = scb->buf;
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if (scb->ops->open(scb, name))
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{
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free (scb);
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return NULL;
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}
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scb->name = strsave (name);
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scb->next = scb_base;
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scb->refcnt = 1;
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scb_base = scb;
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last_serial_opened = scb;
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if (serial_logfile != NULL)
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{
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serial_logfp = gdb_fopen (serial_logfile, "w");
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if (serial_logfp == NULL)
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perror_with_name (serial_logfile);
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}
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return scb;
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}
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serial_t
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serial_fdopen (fd)
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const int fd;
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{
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serial_t scb;
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struct serial_ops *ops;
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for (scb = scb_base; scb; scb = scb->next)
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if (scb->fd == fd)
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{
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scb->refcnt++;
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return scb;
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}
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ops = serial_interface_lookup ("hardwire");
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if (!ops)
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return NULL;
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scb = (serial_t)xmalloc (sizeof (struct _serial_t));
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scb->ops = ops;
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scb->bufcnt = 0;
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scb->bufp = scb->buf;
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scb->fd = fd;
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scb->name = NULL;
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scb->next = scb_base;
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scb->refcnt = 1;
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scb_base = scb;
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last_serial_opened = scb;
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return scb;
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}
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void
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serial_close (scb, really_close)
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serial_t scb;
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int really_close;
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{
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serial_t tmp_scb;
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last_serial_opened = NULL;
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if (serial_logfp)
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{
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fputs_unfiltered ("\nEnd of log\n", serial_logfp);
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serial_current_type = 0;
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/* XXX - What if serial_logfp == gdb_stdout or gdb_stderr? */
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gdb_fclose (&serial_logfp);
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serial_logfp = NULL;
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}
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/* This is bogus. It's not our fault if you pass us a bad scb...! Rob, you
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should fix your code instead. */
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if (!scb)
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return;
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scb->refcnt--;
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if (scb->refcnt > 0)
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return;
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if (really_close)
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scb->ops->close (scb);
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if (scb->name)
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free (scb->name);
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if (scb_base == scb)
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scb_base = scb_base->next;
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else
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for (tmp_scb = scb_base; tmp_scb; tmp_scb = tmp_scb->next)
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{
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if (tmp_scb->next != scb)
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continue;
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tmp_scb->next = tmp_scb->next->next;
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break;
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}
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free(scb);
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}
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#if 0
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/*
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The connect command is #if 0 because I hadn't thought of an elegant
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way to wait for I/O on two serial_t's simultaneously. Two solutions
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came to mind:
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1) Fork, and have have one fork handle the to user direction,
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and have the other hand the to target direction. This
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obviously won't cut it for MSDOS.
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2) Use something like select. This assumes that stdin and
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the target side can both be waited on via the same
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mechanism. This may not be true for DOS, if GDB is
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talking to the target via a TCP socket.
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-grossman, 8 Jun 93
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*/
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/* Connect the user directly to the remote system. This command acts just like
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the 'cu' or 'tip' command. Use <CR>~. or <CR>~^D to break out. */
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static serial_t tty_desc; /* Controlling terminal */
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static void
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cleanup_tty(ttystate)
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serial_ttystate ttystate;
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{
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printf_unfiltered ("\r\n[Exiting connect mode]\r\n");
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SERIAL_SET_TTY_STATE (tty_desc, ttystate);
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free (ttystate);
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SERIAL_CLOSE (tty_desc);
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}
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static void
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connect_command (args, fromtty)
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char *args;
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int fromtty;
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{
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int c;
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char cur_esc = 0;
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serial_ttystate ttystate;
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serial_t port_desc; /* TTY port */
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dont_repeat();
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if (args)
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fprintf_unfiltered(gdb_stderr, "This command takes no args. They have been ignored.\n");
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printf_unfiltered("[Entering connect mode. Use ~. or ~^D to escape]\n");
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tty_desc = SERIAL_FDOPEN (0);
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port_desc = last_serial_opened;
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ttystate = SERIAL_GET_TTY_STATE (tty_desc);
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SERIAL_RAW (tty_desc);
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SERIAL_RAW (port_desc);
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make_cleanup (cleanup_tty, ttystate);
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while (1)
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{
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int mask;
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mask = SERIAL_WAIT_2 (tty_desc, port_desc, -1);
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if (mask & 2)
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{ /* tty input */
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char cx;
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while (1)
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{
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c = SERIAL_READCHAR(tty_desc, 0);
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if (c == SERIAL_TIMEOUT)
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break;
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if (c < 0)
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perror_with_name("connect");
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cx = c;
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SERIAL_WRITE(port_desc, &cx, 1);
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switch (cur_esc)
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{
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case 0:
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if (c == '\r')
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cur_esc = c;
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break;
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case '\r':
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if (c == '~')
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cur_esc = c;
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else
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cur_esc = 0;
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break;
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case '~':
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if (c == '.' || c == '\004')
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return;
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else
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cur_esc = 0;
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}
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}
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}
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if (mask & 1)
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{ /* Port input */
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char cx;
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while (1)
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{
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c = SERIAL_READCHAR(port_desc, 0);
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if (c == SERIAL_TIMEOUT)
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break;
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if (c < 0)
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perror_with_name("connect");
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cx = c;
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SERIAL_WRITE(tty_desc, &cx, 1);
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}
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}
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}
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}
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#endif /* 0 */
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/* VARARGS */
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void
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#ifdef ANSI_PROTOTYPES
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serial_printf (serial_t desc, const char *format, ...)
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#else
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serial_printf (va_alist)
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va_dcl
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#endif
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{
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va_list args;
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char *buf;
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#ifdef ANSI_PROTOTYPES
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va_start (args, format);
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#else
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serial_t desc;
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char *format;
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va_start (args);
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desc = va_arg (args, serial_t);
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format = va_arg (args, char *);
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#endif
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vasprintf (&buf, format, args);
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SERIAL_WRITE (desc, buf, strlen (buf));
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free (buf);
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va_end (args);
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}
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void
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_initialize_serial ()
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{
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#if 0
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add_com ("connect", class_obscure, connect_command,
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"Connect the terminal directly up to the command monitor.\n\
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Use <CR>~. or <CR>~^D to break out.");
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#endif /* 0 */
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add_show_from_set
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(add_set_cmd ("remotelogfile", no_class,
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var_filename, (char *) &serial_logfile,
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"Set filename for remote session recording.\n\
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This file is used to record the remote session for future playback\n\
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by gdbserver.",
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&setlist),
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&showlist);
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add_show_from_set
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(add_set_enum_cmd ("remotelogbase", no_class,
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logbase_enums, (char *) &serial_logbase,
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"Set numerical base for remote session logging",
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&setlist),
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&showlist);
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}
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