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Newsgroups: comp.os.386bsd.bugs Path: sserve!newshost.anu.edu.au!harbinger.cc.monash.edu.au!msuinfo!agate!howland.reston.ans.net!Germany.EU.net!EU.net!sun4nl!swi.psy.uva.nl!croes From: croes@swi.psy.uva.nl (Felix A. Croes) Subject: [NetBSD 1.0] page fault in supervisor mode Message-ID: <CzKM05.3DA@swi.psy.uva.nl> Summary: crash, no core dump Keywords: crash Organization: Social Science Informatics Date: Sun, 20 Nov 1994 14:38:28 GMT Lines: 82 My system (NetBSD 1.0) rebooted with a page fault in supervisor mode. No core dump was generated. I don't know if it is related, but previously, while debugging, I noticed that gdb behaved badly. In such innocent commands as backtrace, sometimes a bad memory address would be accessed, and sometimes the stated error would be "No such process." Repeating the same command would often succeed without any errors. My system configuration is given below (16 Mb swap). Felix Croes Nov 20 15:14:04 pattern /netbsd: NetBSD 1.0 (PATTERN) #3: Thu Nov 10 15:09:18 ME T 1994 Nov 20 15:14:04 pattern /netbsd: root@pattern:/usr/src/sys/arch/i386/compile /PATTERN Nov 20 15:14:04 pattern /netbsd: CPU: i486DX (486-class CPU) Nov 20 15:14:04 pattern /netbsd: real mem = 8257536 Nov 20 15:14:04 pattern /netbsd: avail mem = 6991872 Nov 20 15:14:04 pattern /netbsd: using 126 buffers containing 516096 bytes of me mory Nov 20 15:14:04 pattern /netbsd: pc0 at isa0 port 0x60-0x6f irq 1: color Nov 20 15:14:04 pattern /netbsd: com0 at isa0 port 0x3f8-0x3ff irq 4: ns82450 or ns16450, no fifo Nov 20 15:14:04 pattern /netbsd: com1 at isa0 port 0x2f8-0x2ff irq 3: ns82450 or ns16450, no fifo Nov 20 15:14:04 pattern /netbsd: com2 at isa0 port 0x3e8-0x3ef irq 5: ns16550a, working fifo Nov 20 15:14:04 pattern /netbsd: lpt0 at isa0 port 0x378-0x37f irq 7 Nov 20 15:14:05 pattern /netbsd: wdc0 at isa0 port 0x1f0-0x1f7 irq 14 Nov 20 15:14:05 pattern /netbsd: wd0 at wdc0 drive 0: 244MB 1010 cyl, 9 head, 55 sec <WDC AC2250F> Nov 20 15:14:05 pattern /netbsd: fdc0 at isa0 port 0x3f0-0x3f7 irq 6 drq 2 Nov 20 15:14:05 pattern /netbsd: fd0 at fdc0 drive 0: 1.44MB 80 cyl, 2 head, 18 sec Nov 20 15:14:05 pattern /netbsd: npx0 at isa0 port 0xf0-0xff: using exception 16 Nov 20 15:14:05 pattern /netbsd: biomask 4040 netmask 3a ttymask 3a machine "i386" cpu "I486_CPU" ident PATTERN timezone -1 maxusers 8 options SWAPPAGER,VNODEPAGER,DEVPAGER options FFS options MFS options INET options "USER_LDT" options "COMPAT_43" options "TCP_COMPAT_42" options XSERVER,UCONSOLE options MSDOSFS options KERNFS options "COMPAT_NOMID" options "COMPAT_09" options "MACHINE_NONCONTIG" config netbsd root on wd0 swap on wd0 controller isa0 device pc0 at isa? port "IO_KBD" irq 1 device com0 at isa? port "IO_COM1" irq 4 device com1 at isa? port "IO_COM2" irq 3 device com2 at isa? port "IO_COM3" irq 5 device lpt0 at isa? port "IO_LPT1" irq 7 controller wdc0 at isa? port "IO_WD1" irq 14 disk wd0 at wdc0 drive ? controller fdc0 at isa? port "IO_FD1" irq 6 drq 2 disk fd0 at fdc0 drive ? device npx0 at isa? port "IO_NPX" irq 13 pseudo-device log pseudo-device loop pseudo-device pty 32 pseudo-device sl 1 pseudo-device speaker