Date: Sun, 31 Oct 2004 10:27:41 +0100 From: Greg 'groggy' Lehey <grog@FreeBSD.org> To: Ryan Sommers <ryans@gamersimpact.com> Cc: FreeBSD current users <FreeBSD-current@FreeBSD.ORG> Subject: Re: Remote gdb broken in -CURRENT? Message-ID: <20041031092741.GE2693@eucla.lemis.com> In-Reply-To: <418391D5.1070708@gamersimpact.com> References: <20041030095531.GD2730@eucla.lemis.com> <418391D5.1070708@gamersimpact.com>
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On Saturday, 30 October 2004 at 8:06:29 -0500, Ryan Sommers wrote: > Greg 'groggy' Lehey wrote: > >> Is anybody currently using remote gdb kernel debugging in -CURRENT? I >> tried yesterday (embarrassingly, during my kernel debug tutorial), and >> it looks as if things are broken. >> >> Specifically, I was doing it in conjunction with firewire. The kernel >> was built with 'options GDB', and it showed that the corresponding gdb >> functions were included, but the sysctl debug.kdb.available shows only >> ddb. I did a bit of looking around for what might have caused it, but >> wasn't successful. >> >> Any ideas? > > This is probably caused by you not having any serial ports flagged > for GDB. You shouldn't need any. As I said, this is with firewire. > In /boot/device.hints look for the 'hint.sio.X.flags' where X is > your serial port. It should be 0x90 for remote GDB debugging. To select this serial port for both remote gdb and serial console, yes. I did check this and found it to be 0x10 (only serial console). This has not stopped gdb from working on my older -CURRENT (6 months or so) machine. It's possible that you're right, but that would be a recent bug. Unfortunately, we were trying this on the machine of a course participant, and he's no longer available. I'll check your suggestion when I get back home in a week or so. Is anybody currently using remote gdb (serial or firewire) on a -CURRENT built in the last few weeks? If so, did you need to do anything special to get it to run? Greg -- See complete headers for address and phone numbers
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