Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!samsung!caen!ox.com!ox.com!emv From: emv@ox.com (Ed Vielmetti) Newsgroups: comp.unix.ultrix Subject: kernel panic, "unaligned access" Message-ID: Date: 6 Mar 91 21:10:03 GMT Sender: usenet@ox.com (Usenet News Administrator) Organization: OTA Limited Partnership, Ann Arbor MI. Lines: 91 "poe" is a decstation 3100 running ultrix 4.1. it recently crashed for no apparent reason. here's a stack trace to show what happened, and the most useful of the uerf messages. nothing obvious in here that clues me in on what's up, I'm writing it off for now to a stray gamma ray. --Ed ********************************* ENTRY 3. ********************************* ----- EVENT INFORMATION ----- EVENT CLASS ERROR EVENT OS EVENT TYPE 200. PANIC SEQUENCE NUMBER 936. OPERATING SYSTEM ULTRIX 32 OCCURRED/LOGGED ON Wed Mar 6 15:20:03 1991 EST OCCURRED ON SYSTEM poe.aa.ox.co SYSTEM ID x82011601 HW REV: x1 FW REV: x16 CPU TYPE: R2000A/R3000 PROCESSOR TYPE KN01 PANIC MESSAGE unaligned access ********************************* ENTRY 4. ********************************* ----- EVENT INFORMATION ----- EVENT CLASS ERROR EVENT OS EVENT TYPE 117. ERROR & STATUS REGS SEQUENCE NUMBER 935. OPERATING SYSTEM ULTRIX 32 OCCURRED/LOGGED ON Wed Mar 6 15:20:03 1991 EST OCCURRED ON SYSTEM poe.aa.ox.co SYSTEM ID x82011601 HW REV: x1 FW REV: x16 CPU TYPE: R2000A/R3000 PROCESSOR TYPE KN01 ----- ERROR & STATUS REGS ----- CAUSE x10000010 EXCEPTION CODE ADR ERR (LOAD OR INST _FETCH) EPC x8008D794 STATUS x0000FF34 CURRENT INTERRUPT STATE DISABLED CURRENT MODE KERNEL PREVIOUS INTERUPT STATE ENABLED PREVIOUS MODE KERNEL OLD INTERUPT STATE ENABLED OLD MODE USER SW INTERRUPT 0 ENABLED SW INTERRUPT 1 ENABLED HW INTERRUPT 0 ENABLED HW INTERRUPT 1 ENABLED HW INTERRUPT 2 ENABLED HW INTERRUPT 3 ENABLED HW INTERRUPT 4 ENABLED HW INTERRUPT 5 ENABLED CACHE STATE NORMAL VIRTUAL ADDRESS x0001000B SP xFFFFDE3C poe% dbx -k ./vmunix.0 ./vmcore.0 (dbx) where > 0 boot(paniced = 0, arghowto = 0) ["../../machine/mips/machdep.c":568, 0x800f54b4] 1 subr_prf.panic(s = 0x8013cecc = "unaligned access") ["../../sys/subr_prf.c":1165, 0x8009dee0] 2 kn01trap_error(ep = 0x8023b6a8, code = 3241116672, sr = 2149617064, cause = 268435472, signo = 0xffffdd74) ["../../machine/mips/kn01.c":514, 0x800f1ab0] 3 trap.trap(ep = 0xffffdd98, code = 2149616896, sr = 65332, cause = 268442744) ["../../machine/mips/trap.c":447, 0x800fdf34] 4 VEC_trap() ["../../machine/mips/locore.s":742, 0x800f3b0c] 5 .block201 ["../../sys/kern_exit.c":314, 0x8008d790] 6 kern_exit.exit(rv = 0) ["../../sys/kern_exit.c":314, 0x8008d790] 7 rexit() ["../../sys/kern_exit.c":221, 0x8008d3e0] 8 syscall(ep = 0xffffdf5c, code = 1, sr = 65340, cause = 32) ["../../machine/mips/trap.c":1074, 0x800ff350] 9 VEC_syscall() ["../../machine/mips/locore.s":797, 0x800f3b94] 10 entry.start() [0x409904] (dbx)