Date: Wed, 1 Sep 1999 13:45:08 -0700 (PDT) From: Brian Fritz <brianfr@speakeasy.org> To: freebsd-questions@freebsd.org Subject: Newly built kernel trap 12s Message-ID: <Pine.LNX.4.05.9909011343030.30947-100000@grace.speakeasy.org>
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Hi,
I've been struggling to build a custom kernel (firewall and bridge)
and have been stopped cold by the latest problem. I'm getting a trap 12
when the boot kernel attempts (apparently) to change the root device to
the slice where FreeBSD lives.
I'm running a 486/133 with a 3G IDE drive, and an SIIG controller that
supports LBA.
The stock 3.2 "installation" kernel boots fine.
I read a note on debugging "trap 12" problems in the archives, but I'm
hoping that someone has some generic causes, or configuration errors
I should check for.
TIA...
Brian
-> Console messages from new kernel <-
npx0 on motherboard
npx0: INT 16 interface
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x58
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc01b09bb
stack pointer = 0x10:0xc0275f84
frame pointer = 0x10:0xc0275f88
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 = 0 ()
interrupt mask =
trap number = 12
panic: page fault
Automatic Reboot in 15 seconds...
-> /var/log/messages from install kernel <-
/kernel.save: npx0 on motherboard
/kernel.save: npx0: INT 16 interface
/kernel.save: changing root device to wd0s2a
-> /usr/src/sys/i386/conf/MYKERNEL <-
#config kernel root on wd0
config kernel root on wd0s2a
Any help or suggestions would be appreciated.
Brian
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