Date: Sun, 9 Jun 2002 17:23:16 -0700 From: Arun Sharma <arun@sharma-home.net> To: freebsd-hackers@freebsd.org Subject: 0xdeadxxxx ? Message-ID: <20020610002316.GA6628@sharma-home.net>
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I just got a kernel mode page fault. I'd like to find out more
about
> fault virtual address = 0xdeadc162
It looks like the address is meant to signal a particular class of
error. Which one ?
-Arun
Background fsck:
Fatal trap 12: page fault while in kernel mode
cpuid = 0; lapic.id = 00000000
fault virtual address = 0xdeadc162
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc0277ebe
stack pointer = 0x10:0xcaee688c
frame pointer = 0x10:0xcaee68b0
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 = 343 (cron)
kernel: type 12 trap, code=0
Stopped at ufs_strategy+0xbc: calll *0(%edx,%eax,4)
db> trace
ufs_strategy(caee68e4,caee6900,c01e7a1a,caee68e4,0) at ufs_strategy+0xbc
ufs_vnoperate(caee68e4) at ufs_vnoperate+0x13
breadn(cacdbb00,0,0,400,0) at breadn+0xc4
bread(cacdbb00,0,0,400,0) at bread+0x20
ffs_blkatoff(cacdbb00,0,0,0,caee69c8) at ffs_blkatoff+0x88
ufs_lookup(caee6af0,caee6b2c,c01ebe61,caee6af0,caaca274) at
ufs_lookup+0x31f
ufs_vnoperate(caee6af0) at ufs_vnoperate+0x13
vfs_cache_lookup(caee6b94,caee6bc0,c01efc94,caee6b94,caeb841c) at
vfs_cache_loo9
ufs_vnoperate(caee6b94) at ufs_vnoperate+0x13
lookup(caee6c30,caeb841c,caee6bec,c01ce890,c0364178) at lookup+0x2b2
namei(caee6c30) at namei+0x1df
lstat(caeb841c,caee6d14,2,2,292) at lstat+0x4a
syscall(2f,2f,2f,0,0) at syscall+0x1db
syscall_with_err_pushed() at syscall_with_err_pushed+0x1b
--- syscall (190, FreeBSD ELF, lstat), eip = 0x280b2f33, esp = 0xbfbff1ec, ebp -
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