Date: Tue, 5 Nov 2013 02:18:54 GMT From: Howard Su <howard0su@gmail.com> To: freebsd-gnats-submit@FreeBSD.org Subject: arm/183668: Panic when read unalign in ddb Message-ID: <201311050218.rA52Isds041524@oldred.freebsd.org> Resent-Message-ID: <201311050220.rA52K0Vu064154@freefall.freebsd.org>
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>Number: 183668
>Category: arm
>Synopsis: Panic when read unalign in ddb
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-arm
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Tue Nov 05 02:20:00 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator: Howard Su
>Release: FreeBSD-Current
>Organization:
>Environment:
FreeBSD beaglebone 11.0-CURRENT FreeBSD 11.0-CURRENT #0 r257039: Thu Oct 24 11:39:07 CET 2013
>Description:
when read some memory in DDB unalign, the system will get reset. this is inconsistent with i386 behavior.
>How-To-Repeat:
Ctrl-Break, enter DDB
type 'dump thread 1'
>Fix:
Index: sys/arm/arm/trap.c
===================================================================
--- sys/arm/arm/trap.c (revision 257663)
+++ sys/arm/arm/trap.c (working copy)
@@ -528,7 +528,8 @@
#ifdef KDB
if (debugger_on_panic || kdb_active)
- kdb_trap(fsr, 0, tf);
+ if (kdb_trap(fsr, 0, tf))
+ return 0;
#endif
panic("Fatal abort");
/*NOTREACHED*/
>Release-Note:
>Audit-Trail:
>Unformatted:
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