Date: Mon, 16 Aug 2010 23:21:15 +0400 From: Alexey Tarasov <me@lexasoft.ru> To: Kostik Belousov <kostikbel@gmail.com> Cc: freebsd-stable@freebsd.org, Alexey Tarasov <me@lexasoft.ru> Subject: Re: STABLE kernel panic: privileged instruction fault Message-ID: <E14B2DF6-3908-4429-A916-7A8731F7D510@lexasoft.ru> In-Reply-To: <20100816184818.GS2396@deviant.kiev.zoral.com.ua> References: <D3520B14-5DB1-42B7-8D21-731D0BD45788@lexasoft.ru> <20100816184818.GS2396@deviant.kiev.zoral.com.ua>
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Hello Kostik!
On Aug 16, 2010, at 10:48 PM, Kostik Belousov wrote:
>>=20
> The backtrace make absolutely no sense. I would not trust kgdb anyway.
>=20
> Compile ddb in and do backtrace in console on the panic. Also, =
disassemble
> the kernel at the fault address. I am very curious which instruction =
causes
> this. This is stock GENERIC on the bare metal booted, right ?
Yes, stock GENERIC.
Please, check this out:
Dump of assembler code from 0xffffff0060c0b700 to 0xffffff0060c0b780:
0xffffff0060c0b700: add %al,(%rax)
0xffffff0060c0b702: add %al,(%rax)
0xffffff0060c0b704: add %al,(%rax)
0xffffff0060c0b706: add %al,(%rax)
0xffffff0060c0b708: add %al,(%rax)
0xffffff0060c0b70a: add %al,(%rax)
0xffffff0060c0b70c: add %al,(%rax)
0xffffff0060c0b70e: add %al,(%rax)
0xffffff0060c0b710: or %dh,0xffffffffffffffc2(%rax)
0xffffff0060c0b713: cmp $0xff,%bh
0xffffff0060c0b716: (bad) =20
0xffffff0060c0b717: incl (%rax)
0xffffff0060c0b719: add %al,(%rcx)
0xffffff0060c0b71b: add %cl,%bh
0xffffff0060c0b71d: pop %rsp
0xffffff0060c0b71e: out %al,(%dx)
0xffffff0060c0b71f: pop %rdx
0xffffff0060c0b720: or $0x0,%al
0xffffff0060c0b722: add %al,(%rax)
0xffffff0060c0b724: or %al,%fs:(%rax)
0xffffff0060c0b727: add %ah,%bl
0xffffff0060c0b729: int3 =20
0xffffff0060c0b72a: (bad) =20
0xffffff0060c0b72b: add %cl,%bh
0xffffff0060c0b72d: pop %rsp
0xffffff0060c0b72e: out %al,(%dx)
0xffffff0060c0b72f: pop %rdx
0xffffff0060c0b730: iret =20
0xffffff0060c0b731: pop %rsp
0xffffff0060c0b732: out %al,(%dx)
0xffffff0060c0b733: pop %rdx
0xffffff0060c0b734: rex xor $0x9f105aee,%eax
0xffffff0060c0b73a: add %al,(%rax)
0xffffff0060c0b73c: add %al,(%rax)
0xffffff0060c0b73e: add %al,(%rax)
0xffffff0060c0b740: rex pop %rdi
0xffffff0060c0b742: retq $0xff80
0xffffff0060c0b745: (bad) =20
0xffffff0060c0b746: (bad) =20
0xffffff0060c0b747: incl (%rax)
0xffffff0060c0b749: push %rax
0xffffff0060c0b74a: loop 0xffffff0060c0b78e
0xffffff0060c0b74c: add %bh,%bh
0xffffff0060c0b74e: (bad) =20
0xffffff0060c0b74f: incl (%rax)
0xffffff0060c0b751: add %al,(%rax)
0xffffff0060c0b753: add %al,(%rax)
0xffffff0060c0b755: add %al,(%rax)
0xffffff0060c0b757: add %dl,(%rax)
0xffffff0060c0b759: push %rax
0xffffff0060c0b75a: loop 0xffffff0060c0b79e
0xffffff0060c0b75c: add %bh,%bh
0xffffff0060c0b75e: (bad) =20
0xffffff0060c0b75f: incl (%rax)
0xffffff0060c0b761: add %al,(%rax)
0xffffff0060c0b763: add %al,(%rax)
0xffffff0060c0b765: add %al,(%rax)
0xffffff0060c0b767: add %bl,%al
0xffffff0060c0b769: pop %rdi
0xffffff0060c0b76a: retq $0xff80
0xffffff0060c0b76d: (bad) =20
0xffffff0060c0b76e: (bad) =20
0xffffff0060c0b76f: incl (%rax)
0xffffff0060c0b771: add %al,(%rax)
0xffffff0060c0b773: add %al,(%rax)
0xffffff0060c0b775: add %al,(%rax)
0xffffff0060c0b777: add %al,0x290c55(%rax)
0xffffff0060c0b77d: (bad) =20
0xffffff0060c0b77e: (bad) =20
0xffffff0060c0b77f: incl (%rax)
--
Alexey Tarasov
(\__/)=20
(=3D'.'=3D)=20
E[: | | | | :]=D0=97=20
(")_(")
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