Re: After install - Fatal trap 18 ATA problem?

On Fri, Jun 16, 2006 at 01:32:55PM -0400, Anish Mistry wrote:
I'm trying to get FreeBSD installed on one of my systems and I'm
getting the error stated below. I did have FreeBSD 6-STABLE
installed a few months ago on this very system. The only change is
that FreeBSD is now installed on the second harddrive instead of the
first. This is using the -CURRENT snapshot for this month. The
install goes just fine. I also get a very similar error when I
install 6.1 too.

This seems to be the same problem as:
http://unix.derkeiler.com/Mailing-Lists/FreeBSD/stable/2006-03/msg00539.html

But I don't have a built-in compact flash reader attached via. ATA.

Full verbose boot+backtrace:
http://am-productions.biz/docs/boot-panic-script.txt.gz

rr232x: no controller detected.
ata0-slave: pio=PIO4 wdma=WDMA2 udma=UDMA100 cable=80 wire
ata0-master: pio=PIO4 wdma=WDMA2 udma=UDMA66 cable=80 wire
ad0: setting PIO4 on nForce2 Pro chip
ad0: setting UDMA66 on nForce2 Pro chip
ad0: 17206MB <IBM DJNA-371800 J78OA30K> at ata0-master UDMA66


Fatal trap 18: integer divide fault while in kernel mode
cpuid = 0; apic id = 00
instruction pointer = 0x20:0xc089b49f
stack pointer = 0x28:0xc0c20b64
frame pointer = 0x28:0xc0c20bec
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 (swapper)
[thread pid 0 tid 0 ]
Stopped at __qdivrem+0x3b: divl %ecx,%eax
db> bt
Tracing pid 0 tid 0 td 0xc0a02fb8
__qdivrem(219b700,0,0,0,0) at __qdivrem+0x3b
__udivdi3(219b700,0,0,0) at __udivdi3+0x16
^^^
Looks like an attempt to divide something (0x219b700) by zero
using quad_t arithmetics.

ad_describe(c26e8580,c26e8580,c262c280,c265e400,c25ec200) at
ad_describe+0x1b3
ad_attach(c26e8580) at ad_attach+0x1e7
device_attach(c26e8580,c0957850,c26e8580,c265e000,c265e400) at
device_attach+0x58
device_probe_and_attach(c26e8580) at device_probe_and_attach+0xe0
bus_generic_attach(c25d2a80,c25d2a80,1,0,c26e8580) at
bus_generic_attach+0x16
ata_identify(c25d2a80) at ata_identify+0x1c8
ata_boot_attach(0) at ata_boot_attach+0x3e
run_interrupt_driven_config_hooks(0,c1ec00,c1e000,0,c0450af5) at
run_interrupt_driven_config_hooks+0x18
mi_startup() at mi_startup+0x96
begin() at begin+0x2c
db> ps
--
Anish Mistry

FWIW, I saw an integer divide fault apparently related to the ata
driver when I tried to test a low-end VIA-based mobo with FreeBSD.
I gave it away soon and had had no time for debugging though.

Could you see using gdb what C code is at ad_describe+0x1b3
in your kernel?

--
Yar
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