Re: 10.0-RELEASE BTX halted on DELL R900
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On 05 Jul 2014, at 08:09, Arrigo Marchiori <ardovm@yahoo.it> wrote:
>=20
> On Fri, Jul 04, 2014 at 03:37:27PM +0800, wsk wrote:
>> lists
>> I met a BTX halted problem while upgrade Freebsd 9.0-RC3 to=20
>> 10.0-Release via freebsd-update.
>> and please check the link below:
>> http://sw.gddsn.org.cn/jopens/test/btx.jpg
>>=20
>> BTW: I can booted 10.0-R from DVD-ROM as expected but got same error=20=
>> message with flash-driver.
>=20
> I don't remember if that error message means ``division by zero''.
It certainly looks a lot like it. The code at cs:eip from the OP's
screenshot disassembles to:
36217: f7 35 bc d6 03 00 divl 0x3d6bc
3621d: 85 ff test %edi,%edi
3621f: 74 05 je 0x36226
36221: 89 1f mov %ebx,(%edi)
36223: 89 4f 04 mov %ecx,0x4(%edi)
36226: 89 c2 mov %eax,%edx
36228: e9 c2 00 00 00 jmp 0x362ef
3622d: 66 c7 45 ea 00 00 movw $0x0,-0x16(%ebp)
36233: 89 c8 mov %ecx,%eax
This is a piece of code from /usr/src/lib/libstand/qdivrem.c, which is
used to do 64-bit divides.
It would be nice if you could try out this loader binary, which has a
few additional checks for zero sector counts or sizes:
http://www.andric.com/freebsd/loader.edd
SHA256 (loader.edd) =3D =
89f99500adb3a8feaa84336ce625975bcfdc0f886514ab02de4992859a671aa9
However, this might still mis-detect your disk sizes, obviously.
> Just in case, you could try the patch attached to this bug:
> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D176748
>=20
> The patch was compiled for 9-STABLE; if it does not apply to the 10.0
> sources, then drop me a line so I can adapt it.
I tried this patch on a few FreeBSD VMs, and each of them stopped being
able to mount the root filesystem because of it. I don't really know
what the explanation is...
-Dimitry
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