Date: Mon, 30 Aug 2004 13:00:12 -0400 From: Stephan Uphoff <ups@tree.com> To: Rob Deker <deker@slackdot.org> Cc: freebsd-hackers@freebsd.org Subject: Re: Serial consoles and remote GDB Message-ID: <1093885212.61235.102.camel@palm.tree.com> In-Reply-To: <1093835972.6769.55.camel@localhost> References: <1093817592.8552.90.camel@nyx.slackdot.org> <1093820159.61235.81.camel@palm.tree.com> <1093835972.6769.55.camel@localhost>
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Are you sure that your serial line is configured with the right baud rate? I also encountered something like this when additional programs were reading form the serial line and stole characters from gdb. ( terminal emulators for testing, getty? ...) Your /boot/loader.conf should look somewhat like: console=comconsole hint.sio.1.flags=0x80 boot_ddb=1 boot_gdb=1 boot_verbose=1 Good luck Stephan On Sun, 2004-08-29 at 23:19, Rob Deker wrote: > On Sun, 2004-08-29 at 18:55, Stephan Uphoff wrote: > > Hi, > > > > Try the patch from kern/65278 > > > > http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/65278 > > > Thanks, > > Looks like that did some good (I have my console back now), but when i > either "boot -g" or break into ddb and give it a "gdb" command, then try > and connect gdb to it on the other serial port, gdb seems to not be able > to connect to it (and I consequently have to power cycle the machine to > un-hang it). What I get from gdb is the following: > > bash-2.05b$ sudo gdb -k kernel.debug > GNU gdb 5.2.1 (FreeBSD) > Copyright 2002 Free Software Foundation, Inc. > GDB is free software, covered by the GNU General Public License, and you > are > welcome to change it and/or distribute copies of it under certain > conditions. > Type "show copying" to see the conditions. > There is absolutely no warranty for GDB. Type "show warranty" for > details. > This GDB was configured as "i386-unknown-freebsd"... > (kgdb) target remote /dev/cuaa4 > Remote debugging using /dev/cuaa4 > Ignoring packet error, continuing... > Ignoring packet error, continuing... > Ignoring packet error, continuing... > Couldn't establish connection to remote target > Malformed response to offset query, timeout > > thanks for the help, > > -d
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