Monitor multiplexing, by Jason Wessel.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2434 c046a42c-6fe2-441c-8c8c-71466251a162

monitor.c

@@ -54,7 +54,8 @@ typedef struct term_cmd_t {
     const char *help;
 } term_cmd_t;
 
-static CharDriverState *monitor_hd;
+#define MAX_MON 4
+static CharDriverState *monitor_hd[MAX_MON];
 static int hide_banner;
 
 static term_cmd_t term_cmds[];
@@ -69,8 +70,11 @@ CPUState *mon_cpu = NULL;
 
 void term_flush(void)
 {
+    int i;
     if (term_outbuf_index > 0) {
-        qemu_chr_write(monitor_hd, term_outbuf, term_outbuf_index);
+        for (i = 0; i < MAX_MON; i++)
+            if (monitor_hd[i] && monitor_hd[i]->focus == 0)
+                qemu_chr_write(monitor_hd[i], term_outbuf, term_outbuf_index);
         term_outbuf_index = 0;
     }
 }
@@ -2452,9 +2456,25 @@ static void term_event(void *opaque, int event)
     monitor_start_input();
 }
 
+static int is_first_init = 1;
+
 void monitor_init(CharDriverState *hd, int show_banner)
 {
-    monitor_hd = hd;
+    int i;
+
+    if (is_first_init) {
+        for (i = 0; i < MAX_MON; i++) {
+            monitor_hd[i] = NULL;
+        }
+        is_first_init = 0;
+    }
+    for (i = 0; i < MAX_MON; i++) {
+        if (monitor_hd[i] == NULL) {
+            monitor_hd[i] = hd;
+            break;
+        }
+    }
+
     hide_banner = !show_banner;
 
     qemu_chr_add_handlers(hd, term_can_read, term_read, term_event, NULL);
@@ -2475,8 +2495,12 @@ static void monitor_readline_cb(void *opaque, const char *input)
 void monitor_readline(const char *prompt, int is_password,
                       char *buf, int buf_size)
 {
+    int i;
+
     if (is_password) {
-        qemu_chr_send_event(monitor_hd, CHR_EVENT_FOCUS);
+        for (i = 0; i < MAX_MON; i++)
+            if (monitor_hd[i] && monitor_hd[i]->focus == 0)
+                qemu_chr_send_event(monitor_hd[i], CHR_EVENT_FOCUS);
     }
     readline_start(prompt, is_password, monitor_readline_cb, NULL);
     monitor_readline_buf = buf;

qemu-doc.texi

@@ -610,6 +610,18 @@ A unix domain socket is used instead of a tcp socket.  The option works the
 same as if you had specified @code{-serial tcp} except the unix domain socket
 @var{path} is used for connections.
 
+@item mon:dev_string
+This is a special option to allow the monitor to be multiplexed onto
+another serial port.  The monitor is accessed with key sequence of
+@key{Control-a} and then pressing @key{c}. See monitor access
+@ref{pcsys_keys} in the -nographic section for more keys.
+@var{dev_string} should be any one of the serial devices specified
+above.  An example to multiplex the monitor onto a telnet server
+listening on port 4444 would be:
+@table @code
+@item -serial mon:telnet::4444,server,nowait
+@end table
+
 @end table
 
 @item -parallel dev
@@ -629,6 +641,19 @@ serial port).
 The default device is @code{vc} in graphical mode and @code{stdio} in
 non graphical mode.
 
+@item -echr numeric_ascii_value
+Change the escape character used for switching to the monitor when using
+monitor and serial sharing.  The default is @code{0x01} when using the
+@code{-nographic} option.  @code{0x01} is equal to pressing
+@code{Control-a}.  You can select a different character from the ascii
+control keys where 1 through 26 map to Control-a through Control-z.  For
+instance you could use the either of the following to change the escape
+character to Control-t.
+@table @code
+@item -echr 0x14
+@item -echr 20
+@end table
+
 @item -s
 Wait gdb connection to port 1234 (@pxref{gdb_usage}). 
 @item -p port
@@ -711,6 +736,8 @@ Print this help
 Exit emulator
 @item Ctrl-a s    
 Save disk data back to file (if -snapshot)
+@item Ctrl-a t
+toggle console timestamps
 @item Ctrl-a b
 Send break (magic sysrq in Linux)
 @item Ctrl-a c

vl.h

@@ -303,6 +303,7 @@ typedef struct CharDriverState {
     void (*chr_send_event)(struct CharDriverState *chr, int event);
     void (*chr_close)(struct CharDriverState *chr);
     void *opaque;
+    int focus;
     QEMUBH *bh;
 } CharDriverState;