Date: Fri, 28 Dec 2007 09:09:08 -0500 From: "Andrew Duane" <aduane@juniper.net> To: "Sharad Chandra" <sharadc@in.niksun.com>, <freebsd-hackers@freebsd.org> Cc: chandrabhagat@gmail.com Subject: RE: trap 12 with interrupts disabled, need help Message-ID: <0FCFCF6165E968449991746EB91D614DD48EF6@antipi.jnpr.net> In-Reply-To: <200712281127.53084.sharadc@in.niksun.com> References: <200712281127.53084.sharadc@in.niksun.com>
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Obvious question: is your stack set up properly, and is it big enough? It could be that you haven't set up a bigger kernel stack yet, and have overrun the small boot stack that the processor was running on. Do you know what the stack pointer is? If it is a few bytes below a page boundary, then overrunning the stack is a good guess. /Andrew =20 > -----Original Message----- > From: owner-freebsd-hackers@freebsd.org [mailto:owner-freebsd- > hackers@freebsd.org] On Behalf Of Sharad Chandra > Sent: Friday, December 28, 2007 12:58 AM > To: freebsd-hackers@freebsd.org > Cc: chandrabhagat@gmail.com > Subject: trap 12 with interrupts disabled, need help >=20 > Hi, >=20 > I got a message on first boot "pid <no> (<name>): trap 12 with > interrupts > disabled", then it hanged and hard boot is required. > It does not appears all the time. >=20 > I tried to figure out the problem, trap 12 is stack exception, find at the > last > http://www.acm.uiuc.edu/sigops/roll_your_own/i386/idt.html > and is coming from kernel, > The location of this message is /usr/src/ > sys/amd64/amd64/trap.c: "pid %ld (%s): trap %d with > interrupts disabled\n", >=20 > What does this exception mean, and what could be possible reason that my > program is doing wrong? How to handle it >=20 > Platform: freebsd 6.1 on amd64 >=20 > -- >=20 > Thanks > Sharad Chandra > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org"
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