Date: Fri, 18 Oct 2002 13:35:45 -0700 (PDT) From: Julian Elischer <julian@elischer.org> To: Glenn Gombert <freebsd@fastmail.fm> Cc: current@freebsd.org Subject: Re: Remote GDB Trap 12 Fatal On Target Message-ID: <Pine.BSF.4.21.0210181334440.8006-100000@InterJet.elischer.org> In-Reply-To: <20021018005423.9C1D22FD34@server3.fastmail.fm>
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On Fri, 18 Oct 2002, Glenn Gombert wrote: > > > I am trying to get a remote gdb kernel debugging session and on the > Target macine I get the following error: > > "Fatal trap 12: page fault while in kernel mode" .. > fault vurtual address = 0x26 > fault code = supervisor read, page not present" > > is anyone else getting this as well ?? > I get lots of these on the console (which is a different port from the gdb (may be important.... so thety don't colide) but eventually it works.. > There is a thread in -Current last June sometime, with the "fix" being > to add the following line > to the config file: > > ............ > Turns out the workaround is to use DISABLE_PG_G. > > Two things made me try this. One: In his commit of pmap.c > and locore.s on 7/12 7:56 Peter had this to say: > > +-- > |- Try and fix some very bogus PG_G and PG_PS interactions that were bad > | enough to cause vm86 bios calls to break. vm86 depended on our > existing > ... > |New option: DISABLE_PG_G - In case I missed something. > > ---------------------\ > > This did not fix the problem thought, any other ideas appreaciated!! > > > Thanks: > > -- > Glenn Gombert > freebsd@fastmail.fm > > "Never trust any operating system you don't have the source code for" > > -- > http://fastmail.fm - The holy hand grenade of email services > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-current" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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