* remote.c, remote-mon.c, remote-utils.c, remote-utils.h,

target.h, remote-es.c, remote-nindy.c: Don't set baud rate if
	baud_rate is -1.  Remove sr_get_baud_rate and sr_set_baud_rate;
	just use the global variable itself.  When printing baud rate,
	don't print a baud rate if baud_rate is -1.

gdb/ChangeLog

@@ -1,5 +1,11 @@
 Fri Feb 25 09:41:11 1994  Jim Kingdon  (kingdon@deneb.cygnus.com)
 
+	* remote.c, remote-mon.c, remote-utils.c, remote-utils.h,
+	target.h, remote-es.c, remote-nindy.c: Don't set baud rate if
+	baud_rate is -1.  Remove sr_get_baud_rate and sr_set_baud_rate;
+	just use the global variable itself.  When printing baud rate,
+	don't print a baud rate if baud_rate is -1.
+
 	* coffread.c (read_coff_symtab): Pass mst_file_* to
 	record_minimal_symbol for C_STAT symbols.  Put C_EXT and C_STAT
 	symbols in the minimal symbols regardless of SDB_TYPE.

gdb/remote-es.c

@@ -371,10 +371,13 @@ es1800_open (name, from_tty)
       perror_with_name ("fcntl serial");
     }
 
-  if (SERIAL_SETBAUDRATE (es1800_desc, baud_rate))
+  if (baud_rate != -1)
     {
-      SERIAL_CLOSE (es1800_desc);
-      perror_with_name (name);
+      if (SERIAL_SETBAUDRATE (es1800_desc, baud_rate))
+	{
+	  SERIAL_CLOSE (es1800_desc);
+	  perror_with_name (name);
+	}
     }
 
   SERIAL_RAW (es1800_desc);

gdb/remote-mon.c

@@ -341,11 +341,13 @@ general_open(args, name, from_tty)
   if (monitor_desc == NULL)
     perror_with_name(dev_name);
 
-  /* The baud rate was specified when GDB was started.  */
-  if (SERIAL_SETBAUDRATE (monitor_desc, sr_get_baud_rate()))
+  if (baud_rate != -1)
     {
-      SERIAL_CLOSE (monitor_desc);
-      perror_with_name (name);
+      if (SERIAL_SETBAUDRATE (monitor_desc, baud_rate))
+	{
+	  SERIAL_CLOSE (monitor_desc);
+	  perror_with_name (name);
+	}
     }
 
   SERIAL_RAW(monitor_desc);

gdb/remote-nindy.c

@@ -197,7 +197,10 @@ nindy_open (name, from_tty)
   /* Allow user to interrupt the following -- we could hang if there's
      no NINDY at the other end of the remote tty.  */
   immediate_quit++;
-  sprintf(baudrate, "%d", sr_get_baud_rate());
+  /* If baud_rate is -1, then ninConnect will not recognize the baud rate
+     and will deal with the situation in a (more or less) reasonable
+     fashion.  */
+  sprintf(baudrate, "%d", baud_rate);
   ninConnect(name, baudrate,
 	     nindy_initial_brk, !from_tty, nindy_old_protocol);
   immediate_quit--;
@@ -227,8 +230,9 @@ nindy_detach (name, from_tty)
 static void
 nindy_files_info ()
 {
-  printf_unfiltered("\tAttached to %s at %d bps%s%s.\n", savename,
-	 sr_get_baud_rate(),
+  /* FIXME: this lies about the baud rate if we autobauded.  */
+  printf_unfiltered("\tAttached to %s at %d bits per second%s%s.\n", savename,
+	 baud_rate,
 	 nindy_old_protocol? " in old protocol": "",
          nindy_initial_brk? " with initial break": "");
 }

gdb/remote-utils.c

@@ -123,7 +123,7 @@ sr_scan_args(proto, args)
 
   /* check for missing or empty baud rate.  */
   CHECKDONE(p, q);
-  sr_set_baud_rate(n);
+  baud_rate = n;
 
   /* look for debug value.  */
   n = strtol(p, &q, 10);
@@ -177,10 +177,13 @@ gr_open(args, from_tty, gr)
   if (!sr_get_desc())
     perror_with_name((char *) sr_get_device());
 
-  if (SERIAL_SETBAUDRATE(sr_get_desc(), sr_get_baud_rate()) != 0)
+  if (baud_rate != -1)
     {
-      SERIAL_CLOSE(sr_get_desc());
-      perror_with_name(sr_get_device());
+      if (SERIAL_SETBAUDRATE(sr_get_desc(), baud_rate) != 0)
+	{
+	  SERIAL_CLOSE(sr_get_desc());
+	  perror_with_name(sr_get_device());
+	}
     }
 
   SERIAL_RAW (sr_get_desc());
@@ -198,8 +201,13 @@ gr_open(args, from_tty, gr)
     gr_settings->clear_all_breakpoints = remove_breakpoints;
 
   if (from_tty)
-      printf_filtered ("Remote debugging using `%s' at baud rate of %d\n",
-		       sr_get_device(), sr_get_baud_rate());
+    {
+      printf_filtered ("Remote debugging using `%s'", sr_get_device ());
+      if (baud_rate != -1)
+	printf_filtered (" at baud rate of %d",
+			 baud_rate);
+      print_filtered ("\n");
+    }
 
   push_target(gr->ops);
   gr_checkin();
@@ -439,8 +447,10 @@ gr_files_info (ops)
 #ifdef __GO32__
   printf_filtered ("\tAttached to DOS asynctsr\n");
 #else
-  printf_filtered ("\tAttached to %s at %d baud\n",
-		   sr_get_device(), sr_get_baud_rate());
+  printf_filtered ("\tAttached to %s", sr_get_device());
+  if (baud_rate != -1)
+    printf_filtered ("at %d baud", baud_rate);
+  printf_filtered ("\n");
 #endif
 
   if (exec_bfd)

gdb/remote-utils.h

@@ -44,10 +44,6 @@ extern struct _sr_settings sr_settings;
 #define sr_get_debug()			(remote_debug)
 #define sr_set_debug(newval)		(remote_debug = (newval))
 
-/* get and set baud rate. */
-#define sr_get_baud_rate()		(baud_rate)
-#define sr_set_baud_rate(newval)	(baud_rate = (newval))
-
 /* get and set timeout. */
 #define sr_get_timeout()		(sr_settings.timeout)
 #define sr_set_timeout(newval)		(sr_settings.timeout = (newval))

gdb/target.h

@@ -213,6 +213,27 @@ struct target_ops
 					 int len, int write,
 					 struct target_ops * target));
 
+#if 0
+  /* Enable this after 4.12.  */
+
+  /* Search target memory.  Start at STARTADDR and take LEN bytes of
+     target memory, and them with MASK, and compare to DATA.  If they
+     match, set *ADDR_FOUND to the address we found it at, store the data
+     we found at LEN bytes starting at DATA_FOUND, and return.  If
+     not, add INCREMENT to the search address and keep trying until
+     the search address is outside of the range [LORANGE,HIRANGE).
+
+     If we don't find anything, set *ADDR_FOUND to (CORE_ADDR)0 and return.  */
+  void (*to_search) PARAMS ((int len, char *data, char *mask,
+			     CORE_ADDR startaddr, int increment,
+			     CORE_ADDR lorange, CORE_ADDR hirange,
+			     CORE_ADDR *addr_found, char *data_found));
+
+#define	target_search(len, data, mask, startaddr, increment, lorange, hirange, addr_found, data_found)	\
+  (*current_target->to_search) (len, data, mask, startaddr, increment, \
+				lorange, hirange, addr_found, data_found)
+#endif /* 0 */
+
   void 	      (*to_files_info) PARAMS ((struct target_ops *));
   int  	      (*to_insert_breakpoint) PARAMS ((CORE_ADDR, char *));
   int 	      (*to_remove_breakpoint) PARAMS ((CORE_ADDR, char *));
@@ -306,9 +327,13 @@ target_detach PARAMS ((char *, int));
 #define	target_resume(pid, step, siggnal)	\
 	(*current_target->to_resume) (pid, step, siggnal)
 
-/* Wait for process pid to do something.  Pid = -1 to wait for any pid to do
-   something.  Return pid of child, or -1 in case of error; store status
-   through argument pointer STATUS.  */
+/* Wait for process pid to do something.  Pid = -1 to wait for any pid
+   to do something.  Return pid of child, or -1 in case of error;
+   store status through argument pointer STATUS.  Note that it is
+   *not* OK to return_to_top_level out of target_wait without popping
+   the debugging target from the stack; GDB isn't prepared to get back
+   to the prompt with a debugging target but without the frame cache,
+   stop_pc, etc., set up.  */
 
 #define	target_wait(pid, status)		\
 	(*current_target->to_wait) (pid, status)
@@ -594,7 +619,7 @@ find_core_target PARAMS ((void));
    information (higher values, more information).  */
 extern int remote_debug;
 
-/* Speed in bits per second.  */
+/* Speed in bits per second, or -1 which means don't mess with the speed.  */
 extern int baud_rate;
 
 /* Functions for helping to write a native target.  */