Date: Mon, 01 Oct 2012 14:00:36 +0100 From: Randy Bush <randy@psg.com> To: John Baldwin <jhb@freebsd.org> Cc: freebsd-stable@freebsd.org Subject: Re: atkbd attach excitement during boot Message-ID: <m2bogmqrd7.wl%randy@psg.com> In-Reply-To: <201210010855.02130.jhb@freebsd.org> References: <m2a9w7v3bs.wl%randy@psg.com> <201210010855.02130.jhb@freebsd.org>
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>> Fatal trap 12: page fault while in kernel mode
>> cpuid = 0; apic id = 00
>> fault virtual address = 0x38
>> fault code = supervisor read data, page not present
>> instruction pointer = 0x20:0xffffffff80704740
>> stack pointer = 0x28:0xffffffff815336e0
>> frame pointer = 0x28:0xffffffff81533730
>> code segment = base 0x0, limit 0xfffff, type 0x1b
>> = DPL 0, pres 1, long 1, def32 0, gran 1
>> processor eflags = interrupt enabled, resume, IOPL = 0
>> current process = 0 (swapper)
>> trap number = 12
>> panic: page fault
>> cpuid = 0
>> KDB: stack backtrace:
>> #0 0xffffffff809221d6 at kdb_backtrace+0x66
>> #1 0xffffffff808ec40e at panic+0x1ce
>> #2 0xffffffff80bd91a0 at trap_fatal+0x290
>> #3 0xffffffff80bd94d8 at trap_pfault+0x1e8
>> #4 0xffffffff80bd9ade at trap+0x3be
>> #5 0xffffffff80bc33ff at calltrap+0x8
>> #6 0xffffffff80be95fb at atkbd_intr+0xab
>
> Can you run 'gdb /boot/kernel/kernel' and do 'l *atkbd_intr+0xab'?
>
>> #7 0xffffffff80be9dd6 at atkbd_timeout+0x96
>> #8 0xffffffff80be9e94 at atkbd_attach_unit+0xb4
>> #9 0xffffffff80bea0c8 at atkbdattach+0x78
fbsd64.psg.com:/root# gdb /boot/kernel/kernel
GNU gdb 6.1.1 [FreeBSD]
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
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This GDB was configured as "amd64-marcel-freebsd"...
(gdb) l *atkbd_intr+0xab
0xffffffff80be95fb is in atkbd_intr (/usr/src/sys/dev/atkbdc/atkbd.c:512).
507 do {
508 c = atkbd_read_char(kbd, FALSE);
509 } while (c != NOKEY);
510 }
511 return 0;
512 }
513
514 /* test the interface to the device */
515 static int
516 atkbd_test_if(keyboard_t *kbd)
randy
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