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Sender: Warner Losh <wlosh@bsdimp.com>
Subject: Re: [RFC] support -b <baudrate> when starting gdb
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From: Warner Losh <imp@bsdimp.com>
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To: Adrian Chadd <adrian@FreeBSD.org>
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How does 'set remotebaud' not do what you want?

Warner

On Jan 15, 2013, at 10:15 PM, Adrian Chadd wrote:

> Hi,
>=20
> 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.
>=20
> However kgdb doesn't have this support.
>=20
> 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.
>=20
> The MIPS stuff has other issues; I'll talk about those later.
>=20
> Thanks,
>=20
>=20
>=20
> Adrian
>=20
>=20
> Index: gnu/usr.bin/gdb/kgdb/main.c
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> --- gnu/usr.bin/gdb/kgdb/main.c (revision 245281)
> +++ gnu/usr.bin/gdb/kgdb/main.c (working copy)
> @@ -333,11 +333,24 @@
>        args.argv =3D malloc(sizeof(char *));
>        args.argv[0] =3D argv[0];
>=20
> -       while ((ch =3D getopt(argc, argv, "ac:d:fn:qr:vw")) !=3D -1) {
> +       while ((ch =3D getopt(argc, argv, "ab:c:d:fn:qr:vw")) !=3D -1) =
{
>                switch (ch) {
>                case 'a':
>                        annotation_level++;
>                        break;
> +               case 'b':
> +                       {
> +                               int i;
> +                               char *p;
> +
> +                               i =3D strtol (optarg, &p, 0);
> +                               if (i =3D=3D 0 && p =3D=3D optarg)
> +                               warnx("warning: could not set baud
> rate to `%s'.\n",
> +                                   optarg);
> +                               else
> +                                       baud_rate =3D i;
> +                       }
> +                       break;
>                case 'c':       /* use given core file. */
>                        if (vmcore !=3D NULL) {
>                                warnx("option %c: can only be specified =
once",
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