Date: Wed, 12 Mar 1997 12:02:55 +1030 (CST) From: Michael Smith <msmith@atrad.adelaide.edu.au> To: khetan@iafrica.com (Khetan Gajjar) Cc: hackers@freebsd.org Subject: Re: Trap 12's in machine over the last few days Message-ID: <199703120132.MAA19972@genesis.atrad.adelaide.edu.au> In-Reply-To: <Pine.BSF.3.95q.970310134604.830B-100000@chain-work.iafrica.com> from Khetan Gajjar at "Mar 10, 97 01:51:28 pm"
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Khetan Gajjar stands accused of saying: > I'm running 2.2-GAMMA, on a DTK motherboard w/512kb, with a Cyrix P150+ > processor and 48MB RAM. There are 3xIDE 1 gig drives, a SMC EtherPower > NIC and a Diamond Stealth 64. > > Over the last four days, my machine keeps breaking into the debugger, with > the following : > > Fatal Trap 12: page fault while in kernel mode > fault virtual address = 0x0 > fault code = supervisor read, page not present > instruction pointer = 0x8:0x0 Erk, that's a jump through a NULL pointer. > stack pointer = 0x10:0xefbffe54 > frame pointer = 0x10:0xefbffe5c > code segment = base 0x0, limit 0xfffff, type 0x1b > = dpl 0, pres 1, def32 1, gran 1 > processor eflags = interrupt enabled, resume, IOPL = 0 > current process = 248 (halt) > interrupt mask = > kernel:type 12 trap, code=0 > > (Sorry for any typo's - difficult to type this stuff) ... > Any pointers on how to see what the exact problem is ? Does the above trap > help ? I've tried various combinations of RAM, wiggling everything in, > etc, but it doesn't help. Yeah, the 'trace' command will do a reasonable job of unwinding the stack, which should help you work out where the traps are happening. > Khetan Gajjar [ http://www.iafrica.com/~khetan] -- ]] Mike Smith, Software Engineer msmith@gsoft.com.au [[ ]] Genesis Software genesis@gsoft.com.au [[ ]] High-speed data acquisition and (GSM mobile) 0411-222-496 [[ ]] realtime instrument control. (ph) +61-8-8267-3493 [[ ]] Unix hardware collector. "Where are your PEZ?" The Tick [[
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