Initial creation of sourceware repositorygdb-4_18-branchpoint

1 files changed, 526 insertions, 0 deletions

diff --git a/gdb/serial.c b/gdb/serial.c
new file mode 100644
index 0000000..ce420ee
--- /dev/null
+++ b/gdb/serial.c
@@ -0,0 +1,526 @@
+/* Generic serial interface routines
+   Copyright 1992, 1993, 1996, 1997 Free Software Foundation, Inc.
+
+This file is part of GDB.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#include "defs.h"
+#include <ctype.h>
+#include "serial.h"
+#include "gdb_string.h"
+#include "gdbcmd.h"
+
+/* Linked list of serial I/O handlers */
+
+static struct serial_ops *serial_ops_list = NULL;
+
+/* This is the last serial stream opened.  Used by connect command. */
+
+static serial_t last_serial_opened = NULL;
+
+/* Pointer to list of scb's. */
+
+static serial_t scb_base;
+
+/* Non-NULL gives filename which contains a recording of the remote session,
+   suitable for playback by gdbserver. */
+
+static char *serial_logfile = NULL;
+static GDB_FILE *serial_logfp = NULL;
+
+static struct serial_ops *serial_interface_lookup PARAMS ((char *));
+static void serial_logchar PARAMS ((int, int, int));
+static char logbase_hex[] = "hex";
+static char logbase_octal[] = "octal";
+static char logbase_ascii[] = "ascii";
+static char *logbase_enums[] = {logbase_hex, logbase_octal, logbase_ascii, NULL};
+static char *serial_logbase = logbase_ascii;
+
+
+static int serial_current_type = 0;
+
+/* Log char CH of type CHTYPE, with TIMEOUT */
+
+/* Define bogus char to represent a BREAK.  Should be careful to choose a value
+   that can't be confused with a normal char, or an error code.  */
+#define SERIAL_BREAK 1235
+
+static void
+serial_logchar (ch_type, ch, timeout)
+     int ch_type;
+     int ch;
+     int timeout;
+{
+  if (ch_type != serial_current_type)
+    {
+      fprintf_unfiltered (serial_logfp, "\n%c ", ch_type);
+      serial_current_type = ch_type;
+    }
+
+  if (serial_logbase != logbase_ascii)
+    fputc_unfiltered (' ', serial_logfp);
+
+  switch (ch)
+    {
+    case SERIAL_TIMEOUT:
+      fprintf_unfiltered (serial_logfp, "<Timeout: %d seconds>", timeout);
+      return;
+    case SERIAL_ERROR:
+      fprintf_unfiltered (serial_logfp, "<Error: %s>", safe_strerror (errno));
+      return;
+    case SERIAL_EOF:
+      fputs_unfiltered ("<Eof>", serial_logfp);
+      return;
+    case SERIAL_BREAK:
+      fputs_unfiltered ("<Break>", serial_logfp);
+      return;
+    default:
+      if (serial_logbase == logbase_hex)
+	fprintf_unfiltered (serial_logfp, "%02x", ch & 0xff);
+      else if (serial_logbase == logbase_octal)
+	fprintf_unfiltered (serial_logfp, "%03o", ch & 0xff);
+      else
+	switch (ch)
+	  {
+	  case '\\':	fputs_unfiltered ("\\\\", serial_logfp); break;	
+	  case '\b':	fputs_unfiltered ("\\b", serial_logfp); break;	
+	  case '\f':	fputs_unfiltered ("\\f", serial_logfp); break;	
+	  case '\n':	fputs_unfiltered ("\\n", serial_logfp); break;	
+	  case '\r':	fputs_unfiltered ("\\r", serial_logfp); break;	
+	  case '\t':	fputs_unfiltered ("\\t", serial_logfp); break;	
+	  case '\v':	fputs_unfiltered ("\\v", serial_logfp); break;	
+	  default:	fprintf_unfiltered (serial_logfp, isprint (ch) ? "%c" : "\\x%02x", ch & 0xFF); break;
+	  }
+    }
+}
+
+void
+serial_log_command (cmd)
+     const char *cmd;
+{
+  if (!serial_logfp)
+    return;
+
+  serial_current_type = 'c';
+
+  fputs_unfiltered ("\nc ", serial_logfp);
+  fputs_unfiltered (cmd, serial_logfp);
+
+  /* Make sure that the log file is as up-to-date as possible,
+     in case we are getting ready to dump core or something. */
+  gdb_flush (serial_logfp);
+}
+
+int
+serial_write (scb, str, len)
+     serial_t scb;
+     const char *str;
+     int len;
+{
+  if (serial_logfp != NULL)
+    {
+      int count;
+
+      for (count = 0; count < len; count++)
+	serial_logchar ('w', str[count] & 0xff, 0);
+
+      /* Make sure that the log file is as up-to-date as possible,
+	 in case we are getting ready to dump core or something. */
+      gdb_flush (serial_logfp);
+    }
+
+  return (scb -> ops -> write (scb, str, len));
+}
+
+int
+serial_readchar (scb, timeout)
+     serial_t scb;
+     int timeout;
+{
+  int ch;
+
+  ch = scb -> ops -> readchar (scb, timeout);
+  if (serial_logfp != NULL)
+    {
+      serial_logchar ('r', ch, timeout);
+
+      /* Make sure that the log file is as up-to-date as possible,
+	 in case we are getting ready to dump core or something. */
+      gdb_flush (serial_logfp);
+    }
+
+  return (ch);
+}
+
+int
+serial_send_break (scb)
+     serial_t scb;
+{
+  if (serial_logfp != NULL)
+    serial_logchar ('w', SERIAL_BREAK, 0);
+
+  return (scb -> ops -> send_break (scb));
+}
+
+static struct serial_ops *
+serial_interface_lookup (name)
+     char *name;
+{
+  struct serial_ops *ops;
+
+  for (ops = serial_ops_list; ops; ops = ops->next)
+    if (strcmp (name, ops->name) == 0)
+      return ops;
+
+  return NULL;
+}
+
+void
+serial_add_interface(optable)
+     struct serial_ops *optable;
+{
+  optable->next = serial_ops_list;
+  serial_ops_list = optable;
+}
+
+/* Open up a device or a network socket, depending upon the syntax of NAME. */
+
+serial_t
+serial_open (name)
+     const char *name;
+{
+  serial_t scb;
+  struct serial_ops *ops;
+
+  for (scb = scb_base; scb; scb = scb->next)
+    if (scb->name && strcmp (scb->name, name) == 0)
+      {
+	scb->refcnt++;
+	return scb;
+      }
+
+  if (strcmp (name, "ocd") == 0)
+    ops = serial_interface_lookup ("ocd");
+  else if (strcmp (name, "pc") == 0)
+    ops = serial_interface_lookup ("pc");
+  else if (strchr (name, ':'))
+    ops = serial_interface_lookup ("tcp");
+  else if (strncmp (name, "lpt", 3) == 0)
+    ops = serial_interface_lookup ("parallel");
+  else
+    ops = serial_interface_lookup ("hardwire");
+
+  if (!ops)
+    return NULL;
+
+  scb = (serial_t)xmalloc (sizeof (struct _serial_t));
+
+  scb->ops = ops;
+
+  scb->bufcnt = 0;
+  scb->bufp = scb->buf;
+
+  if (scb->ops->open(scb, name))
+    {
+      free (scb);
+      return NULL;
+    }
+
+  scb->name = strsave (name);
+  scb->next = scb_base;
+  scb->refcnt = 1;
+  scb_base = scb;
+
+  last_serial_opened = scb;
+
+  if (serial_logfile != NULL)
+    {
+      serial_logfp = gdb_fopen (serial_logfile, "w");
+      if (serial_logfp == NULL)
+	perror_with_name (serial_logfile);
+    }
+
+  return scb;
+}
+
+serial_t
+serial_fdopen (fd)
+     const int fd;
+{
+  serial_t scb;
+  struct serial_ops *ops;
+
+  for (scb = scb_base; scb; scb = scb->next)
+    if (scb->fd == fd)
+      {
+	scb->refcnt++;
+	return scb;
+      }
+
+  ops = serial_interface_lookup ("hardwire");
+
+  if (!ops)
+    return NULL;
+
+  scb = (serial_t)xmalloc (sizeof (struct _serial_t));
+
+  scb->ops = ops;
+
+  scb->bufcnt = 0;
+  scb->bufp = scb->buf;
+
+  scb->fd = fd;
+
+  scb->name = NULL;
+  scb->next = scb_base;
+  scb->refcnt = 1;
+  scb_base = scb;
+
+  last_serial_opened = scb;
+
+  return scb;
+}
+
+void
+serial_close (scb, really_close)
+     serial_t scb;
+     int really_close;
+{
+  serial_t tmp_scb;
+
+  last_serial_opened = NULL;
+
+  if (serial_logfp)
+    {
+      fputs_unfiltered ("\nEnd of log\n", serial_logfp);
+      serial_current_type = 0;
+
+      /* XXX - What if serial_logfp == gdb_stdout or gdb_stderr? */
+      gdb_fclose (&serial_logfp); 
+      serial_logfp = NULL;
+    }
+
+/* This is bogus.  It's not our fault if you pass us a bad scb...!  Rob, you
+   should fix your code instead.  */
+
+  if (!scb)
+    return;
+
+  scb->refcnt--;
+  if (scb->refcnt > 0)
+    return;
+
+  if (really_close)
+    scb->ops->close (scb);
+
+  if (scb->name)
+    free (scb->name);
+
+  if (scb_base == scb)
+    scb_base = scb_base->next;
+  else
+    for (tmp_scb = scb_base; tmp_scb; tmp_scb = tmp_scb->next)
+      {
+	if (tmp_scb->next != scb)
+	  continue;
+
+	tmp_scb->next = tmp_scb->next->next;
+	break;
+      }
+
+  free(scb);
+}
+
+#if 0
+/*
+The connect command is #if 0 because I hadn't thought of an elegant
+way to wait for I/O on two serial_t's simultaneously.  Two solutions
+came to mind:
+
+	1) Fork, and have have one fork handle the to user direction,
+	   and have the other hand the to target direction.  This
+	   obviously won't cut it for MSDOS.
+
+	2) Use something like select.  This assumes that stdin and
+	   the target side can both be waited on via the same
+	   mechanism.  This may not be true for DOS, if GDB is
+	   talking to the target via a TCP socket.
+-grossman, 8 Jun 93
+*/
+
+/* Connect the user directly to the remote system.  This command acts just like
+   the 'cu' or 'tip' command.  Use <CR>~. or <CR>~^D to break out.  */
+
+static serial_t tty_desc;		/* Controlling terminal */
+
+static void
+cleanup_tty(ttystate)
+     serial_ttystate ttystate;
+{
+  printf_unfiltered ("\r\n[Exiting connect mode]\r\n");
+  SERIAL_SET_TTY_STATE (tty_desc, ttystate);
+  free (ttystate);
+  SERIAL_CLOSE (tty_desc);
+}
+
+static void
+connect_command (args, fromtty)
+     char	*args;
+     int	fromtty;
+{
+  int c;
+  char cur_esc = 0;
+  serial_ttystate ttystate;
+  serial_t port_desc;		/* TTY port */
+
+  dont_repeat();
+
+  if (args)
+    fprintf_unfiltered(gdb_stderr, "This command takes no args.  They have been ignored.\n");
+	
+  printf_unfiltered("[Entering connect mode.  Use ~. or ~^D to escape]\n");
+
+  tty_desc = SERIAL_FDOPEN (0);
+  port_desc = last_serial_opened;
+
+  ttystate = SERIAL_GET_TTY_STATE (tty_desc);
+
+  SERIAL_RAW (tty_desc);
+  SERIAL_RAW (port_desc);
+
+  make_cleanup (cleanup_tty, ttystate);
+
+  while (1)
+    {
+      int mask;
+
+      mask = SERIAL_WAIT_2 (tty_desc, port_desc, -1);
+
+      if (mask & 2)
+	{			/* tty input */
+	  char cx;
+
+	  while (1)
+	    {
+	      c = SERIAL_READCHAR(tty_desc, 0);
+
+	      if (c == SERIAL_TIMEOUT)
+		  break;
+
+	      if (c < 0)
+		perror_with_name("connect");
+
+	      cx = c;
+	      SERIAL_WRITE(port_desc, &cx, 1);
+
+	      switch (cur_esc)
+		{
+		case 0:
+		  if (c == '\r')
+		    cur_esc = c;
+		  break;
+		case '\r':
+		  if (c == '~')
+		    cur_esc = c;
+		  else
+		    cur_esc = 0;
+		  break;
+		case '~':
+		  if (c == '.' || c == '\004')
+		    return;
+		  else
+		    cur_esc = 0;
+		}
+	    }
+	}
+
+      if (mask & 1)
+	{			/* Port input */
+	  char cx;
+
+	  while (1)
+	    {
+	      c = SERIAL_READCHAR(port_desc, 0);
+
+	      if (c == SERIAL_TIMEOUT)
+		  break;
+
+	      if (c < 0)
+		perror_with_name("connect");
+
+	      cx = c;
+
+	      SERIAL_WRITE(tty_desc, &cx, 1);
+	    }
+	}
+    }
+}
+#endif /* 0 */
+
+/* VARARGS */
+void
+#ifdef ANSI_PROTOTYPES
+serial_printf (serial_t desc, const char *format, ...)
+#else
+serial_printf (va_alist)
+     va_dcl
+#endif
+{
+  va_list args;
+  char *buf;
+#ifdef ANSI_PROTOTYPES
+  va_start (args, format);
+#else
+  serial_t desc;
+  char *format;
+
+  va_start (args);
+  desc = va_arg (args, serial_t);
+  format = va_arg (args, char *);
+#endif
+
+  vasprintf (&buf, format, args);
+  SERIAL_WRITE (desc, buf, strlen (buf));
+
+  free (buf);
+  va_end (args);
+}
+
+void
+_initialize_serial ()
+{
+#if 0
+  add_com ("connect", class_obscure, connect_command,
+	   "Connect the terminal directly up to the command monitor.\n\
+Use <CR>~. or <CR>~^D to break out.");
+#endif /* 0 */
+
+  add_show_from_set 
+    (add_set_cmd ("remotelogfile", no_class,
+		  var_filename, (char *) &serial_logfile,
+		  "Set filename for remote session recording.\n\
+This file is used to record the remote session for future playback\n\
+by gdbserver.", 
+		  &setlist),
+     &showlist);
+
+  add_show_from_set 
+    (add_set_enum_cmd ("remotelogbase", no_class,
+		       logbase_enums, (char *) &serial_logbase,
+		       "Set numerical base for remote session logging",
+		       &setlist),
+     &showlist);
+}