From owner-freebsd-current@FreeBSD.ORG  Wed Jan 16 05:15:18 2013
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.freebsd.org (mx1.FreeBSD.org [8.8.178.115])
 by hub.freebsd.org (Postfix) with ESMTP id 9E7B27A4;
 Wed, 16 Jan 2013 05:15:18 +0000 (UTC)
 (envelope-from adrian.chadd@gmail.com)
Received: from mail-wg0-f52.google.com (mail-wg0-f52.google.com [74.125.82.52])
 by mx1.freebsd.org (Postfix) with ESMTP id 1B76A87D;
 Wed, 16 Jan 2013 05:15:17 +0000 (UTC)
Received: by mail-wg0-f52.google.com with SMTP id 12so597102wgh.19
 for <multiple recipients>; Tue, 15 Jan 2013 21:15:11 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113;
 h=mime-version:x-received:sender:date:x-google-sender-auth:message-id
 :subject:from:to:cc:content-type;
 bh=nyffFEU7b1yKrcNQVeyY/zr3oNHAng2WWBWoLIwWU1g=;
 b=pzkfBq7yWVVGHBMvpIBm5RMXV5Y+cGkdaDOMH+iiV+SbCeuJNi1fxKgOxmGnxmtfAa
 QW3DAmY3WiUJczbzeAdEB40+/J1GnF1TeranCxZ3x8d/zpYfyDOo8tmKwdAJmbYW/Nb2
 Loawm0JKrQ1gkm8d3aknt09rR8m3BoM8KPRwa5d2ZgOAD8+HWcPZb1dsR2mD2M/i/gjv
 fZb3H2vhwXQwYngj8EIrYz86hQH2PodPr06wGHQKRKlvkbgUcuyPUY8e8gVOEuOmzf6v
 PuP7+CoUybZjv7oBZNBV2HYGySMd0N5iJGUVZ6Z+OGoaZkadlLF4FkhZI9VI/u3KMX5C
 G6uw==
MIME-Version: 1.0
X-Received: by 10.180.72.146 with SMTP id d18mr7420563wiv.33.1358313311570;
 Tue, 15 Jan 2013 21:15:11 -0800 (PST)
Sender: adrian.chadd@gmail.com
Received: by 10.217.57.9 with HTTP; Tue, 15 Jan 2013 21:15:11 -0800 (PST)
Date: Tue, 15 Jan 2013 21:15:11 -0800
X-Google-Sender-Auth: A98CtrDRxI-7miMqNDazmcNBKHg
Message-ID: <CAJ-Vmo=egCndUfHoQVS3Sy8rd0QOEm96mJ1Vv3K+rRuJcUpp9Q@mail.gmail.com>
Subject: [RFC] support -b <baudrate> when starting gdb
From: Adrian Chadd <adrian@freebsd.org>
To: freebsd-hackers@freebsd.org
Content-Type: text/plain; charset=ISO-8859-1
Cc: freebsd-current <freebsd-current@freebsd.org>
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.14
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
 <freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-current>, 
 <mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
 <mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 16 Jan 2013 05:15:18 -0000

Hi,

There doesn't seem to be a blessed way to set the baudrate from inside
gdb/kgdb. It seems to be set from '-b' on the command line.

However kgdb doesn't have this support.

This patch adds -b support so kgdb so I can override the default speed
(9600 it seems) to speak kgdb over serial to a 115200 console MIPS
device.

The MIPS stuff has other issues; I'll talk about those later.

Thanks,



Adrian


Index: gnu/usr.bin/gdb/kgdb/main.c
===================================================================
--- gnu/usr.bin/gdb/kgdb/main.c (revision 245281)
+++ gnu/usr.bin/gdb/kgdb/main.c (working copy)
@@ -333,11 +333,24 @@
        args.argv = malloc(sizeof(char *));
        args.argv[0] = argv[0];

-       while ((ch = getopt(argc, argv, "ac:d:fn:qr:vw")) != -1) {
+       while ((ch = getopt(argc, argv, "ab:c:d:fn:qr:vw")) != -1) {
                switch (ch) {
                case 'a':
                        annotation_level++;
                        break;
+               case 'b':
+                       {
+                               int i;
+                               char *p;
+
+                               i = strtol (optarg, &p, 0);
+                               if (i == 0 && p == optarg)
+                               warnx("warning: could not set baud
rate to `%s'.\n",
+                                   optarg);
+                               else
+                                       baud_rate = i;
+                       }
+                       break;
                case 'c':       /* use given core file. */
                        if (vmcore != NULL) {
                                warnx("option %c: can only be specified once",