Date: Wed, 21 May 1997 18:01:30 +0900 From: Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp> To: Bruce Evans <bde@zeta.org.au> Cc: dg@root.com, peter@spinner.DIALix.COM, freebsd-bugs@freebsd.org, thorpej@nas.nasa.gov, imp@village.org, yokota@zodiac.mech.utsunomiya-u.ac.jp Subject: Re: trap type 29 on P6 Message-ID: <199705210901.SAA10254@zodiac.mech.utsunomiya-u.ac.jp> In-Reply-To: Your message of "Tue, 20 May 1997 15:55:00 %2B1000." <199705200555.PAA19649@godzilla.zeta.org.au> References: <199705200555.PAA19649@godzilla.zeta.org.au>
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>>Hmm.. But what I want to know is why the local APIC is doing this when
>>it's not active? And why does it coincide with IO instructions?
>>
>>Anyway, assuming that's the case, how does this look:
>>Index: trap.c
>
>I don't like ignoring unexpected exceptions. I would only ignore
>exception 15 on P6's (it's sort of expected there).
How about this then?
Alternatively, should we filter this exception at the lower level in
exception.s?
Kazu
--- trap.c-dist Sun May 4 18:58:18 1997
+++ trap.c Wed May 21 17:48:10 1997
@@ -431,6 +431,7 @@
}
return;
}
+ break;
#else /* !POWERFAIL_NMI */
#ifdef DDB
/* NMI can be hooked up to a pushbutton for debugging */
@@ -439,10 +440,17 @@
return;
#endif /* DDB */
/* machine/parity/power fail/"kitchen sink" faults */
- if (isa_nmi(code) == 0) return;
- /* FALL THROUGH */
+ if (isa_nmi(code) == 0)
+ return;
+ break;
#endif /* POWERFAIL_NMI */
#endif /* NISA > 0 */
+ case T_RESERVED:
+ if (cpu == CPU_686) {
+ printf("stray T_RESERVED trap (ignored)\n");
+ return;
+ }
+ break;
}
trap_fatal(&frame);
help
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