gdb/:

* ser-unix.c (show_serial_hwflow): New function.
(hardwire_raw): Add hardware flow control support.
(_initialize_ser_hardwire): Add "set/show remoteflow".
* Makefile.in (ser-unix.o): Depend on $(gdbcmd_h).
* NEWS: Document the new command.

gdb/doc/:
* gdb.texinfo (Remote Configuration): Document "set/show
remoteflow".

6 files changed, 70 insertions, 1 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 6847009f..d24db0b 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,12 @@
+2007-05-22  Chris Dearman  <chris@mips.com>
+            Maciej W. Rozycki  <macro@mips.com>
+
+	* ser-unix.c (show_serial_hwflow): New function.
+	(hardwire_raw): Add hardware flow control support.
+	(_initialize_ser_hardwire): Add "set/show remoteflow".
+	* Makefile.in (ser-unix.o): Depend on $(gdbcmd_h).
+	* NEWS: Document the new command.
+
 2007-05-21  Ulrich Weigand  <uweigand@de.ibm.com>
 
 	* config/i386/tm-linux.h (sys_quotactl): Do not define.
diff --git a/gdb/Makefile.in b/gdb/Makefile.in
index fe3bfad..5077e67 100644
--- a/gdb/Makefile.in
+++ b/gdb/Makefile.in
@@ -2541,7 +2541,7 @@ ser-pipe.o: ser-pipe.c $(defs_h) $(serial_h) $(ser_base_h) $(ser_unix_h) \
 ser-tcp.o: ser-tcp.c $(defs_h) $(serial_h) $(ser_base_h) $(ser_tcp_h) \
 	$(gdb_string_h)
 ser-unix.o: ser-unix.c $(defs_h) $(serial_h) $(ser_base_h) $(ser_unix_h) \
-	$(terminal_h) $(gdb_select_h) $(gdb_string_h)
+	$(terminal_h) $(gdb_select_h) $(gdb_string_h) $(gdbcmd_h)
 ser-mingw.o: ser-mingw.c $(defs_h) $(serial_h) $(ser_base_h) \
 	$(ser_tcp_h) $(gdb_assert_h) $(gdb_string_h)
 sh64-tdep.o: sh64-tdep.c $(defs_h) $(frame_h) $(frame_base_h) \
diff --git a/gdb/NEWS b/gdb/NEWS
index c64b597..ed7ae7c 100644
--- a/gdb/NEWS
+++ b/gdb/NEWS
@@ -39,6 +39,11 @@ has been rewritten to use the standard GDB remote protocol.
 
 * New commands
 
+set remoteflow
+show remoteflow
+  Enable or disable hardware flow control (RTS/CTS) on the serial port
+  when debugging using remote targets.
+
 set mem inaccessible-by-default
 show mem inaccessible-by-default
   If the target supplies a memory map, for instance via the remote
diff --git a/gdb/doc/ChangeLog b/gdb/doc/ChangeLog
index 48dff96..d11eaf0 100644
--- a/gdb/doc/ChangeLog
+++ b/gdb/doc/ChangeLog
@@ -1,3 +1,8 @@
+2007-05-22  Maciej W. Rozycki  <macro@mips.com>
+
+	* gdb.texinfo (Remote Configuration): Document "set/show
+	remoteflow".
+
 2007-05-16  Daniel Jacobowitz  <dan@codesourcery.com>
 
 	* gdb.texinfo (MIPS): Remove documentation for set mips saved-gpreg-size,
diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo
index 45005f3..c805127 100644
--- a/gdb/doc/gdb.texinfo
+++ b/gdb/doc/gdb.texinfo
@@ -12792,6 +12792,16 @@ expect to see @samp{Ctrl-C} as the interrupt signal.
 Show whether @value{GDBN} sends @code{BREAK} or @samp{Ctrl-C} to
 interrupt the remote program.
 
+@item set remoteflow on
+@itemx set remoteflow off
+@kindex set remoteflow
+Enable or disable hardware flow control (@code{RTS}/@code{CTS})
+on the serial port used to communicate to the remote target.
+
+@item show remoteflow
+@kindex show remoteflow
+Show the current setting of hardware flow control.
+
 @item set remotelogbase @var{base}
 Set the base (a.k.a.@: radix) of logging serial protocol
 communications to @var{base}.  Supported values of @var{base} are:
diff --git a/gdb/ser-unix.c b/gdb/ser-unix.c
index c45bfc6..3a24ac1 100644
--- a/gdb/ser-unix.c
+++ b/gdb/ser-unix.c
@@ -33,6 +33,7 @@
 
 #include "gdb_select.h"
 #include "gdb_string.h"
+#include "gdbcmd.h"
 
 #ifdef HAVE_TERMIOS
 
@@ -40,6 +41,18 @@ struct hardwire_ttystate
   {
     struct termios termios;
   };
+
+#ifdef CRTSCTS
+/* Boolean to explicitly enable or disable h/w flow control.  */
+static int serial_hwflow;
+static void
+show_serial_hwflow (struct ui_file *file, int from_tty,
+		    struct cmd_list_element *c, const char *value)
+{
+  fprintf_filtered (file, _("Hardware flow control is %s.\n"), value);
+}
+#endif
+
 #endif /* termios */
 
 #ifdef HAVE_TERMIO
@@ -387,6 +400,19 @@ hardwire_raw (struct serial *scb)
   state.termios.c_lflag = 0;
   state.termios.c_cflag &= ~(CSIZE | PARENB);
   state.termios.c_cflag |= CLOCAL | CS8;
+#ifdef CRTSCTS
+  /* h/w flow control.  */
+  if (serial_hwflow)
+    state.termios.c_cflag |= CRTSCTS;
+  else
+    state.termios.c_cflag &= ~CRTSCTS;
+#ifdef CRTS_IFLOW
+  if (serial_hwflow)
+    state.termios.c_cflag |= CRTS_IFLOW;
+  else
+    state.termios.c_cflag &= ~CRTS_IFLOW;
+#endif
+#endif
   state.termios.c_cc[VMIN] = 0;
   state.termios.c_cc[VTIME] = 0;
 #endif
@@ -892,6 +918,20 @@ _initialize_ser_hardwire (void)
   ops->read_prim = ser_unix_read_prim;
   ops->write_prim = ser_unix_write_prim;
   serial_add_interface (ops);
+
+#ifdef HAVE_TERMIOS
+#ifdef CRTSCTS
+  add_setshow_boolean_cmd ("remoteflow", no_class,
+			   &serial_hwflow, _("\
+Set use of hardware flow control for remote serial I/O."), _("\
+Show use of hardware flow control for remote serial I/O."), _("\
+Enable or disable hardware flow control (RTS/CTS) on the serial port\n\
+when debugging using remote targets."),
+			   NULL,
+			   show_serial_hwflow,
+			   &setlist, &showlist);
+#endif
+#endif
 }
 
 int