Skip site navigation (1)Skip section navigation (2)
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>

next in thread | previous in thread | raw e-mail | index | archive | help


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




Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.BSF.4.21.0210181334440.8006-100000>