DragonFly kernel List (threaded) for 2004-06
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Re: trap 12 during boot
>>>>> Matthew Dillon writes:
> :This occured with a world/kernel from yesterday sources:
> :
> :Booting [/kernel]...
> :ACPI autoload failed - no such file or directory
> :...
> If it happens again get a stack backtrace using 'trace'. If you have a
> kernel core we can work from that, too.
The trace does not help here:
db> trace
Fatal trap 12: page fault while in kernel mode
mp_lock = 00000000; cpuid = 0; lapic.id = 01000000
fault virtual address = 0x8758b53
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc02f0a50
stack pointer = 0x10:0xc048eac8
frame pointer = 0x10:0xc048eacc
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = resume, IOPL = 0
current process = 0 (swapper)
current thread = pri 12
interrupt mask = net tty bio cam <- SMP: XXX
kernel: type 12 trap, code=0
db>
Here the IP is into the debugger:
c02f004c T db_disasm
c02f07a8 T kdb_trap
c02f0a34 T db_read_bytes
c02f0a6c T db_write_bytes
Jean-Marc
--
Jean-Marc Zucconi -- PGP Key: finger jmz@xxxxxxxxxxx [KeyID: 400B38E9]
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