Date: Sun, 06 Jul 2014 12:41:38 +0800 From: wsk <wsk@gddsn.org.cn> To: Dimitry Andric <dim@FreeBSD.org>, Arrigo Marchiori <ardovm@yahoo.it> Cc: stable@freebsd.org, questions@freebsd.org Subject: Re: 10.0-RELEASE BTX halted on DELL R900 Message-ID: <53B8D382.2000809@gddsn.org.cn> In-Reply-To: <5881B5EA-B625-4E47-ADCB-3F2F894A8630@FreeBSD.org> References: <53B659B7.3020202@gddsn.org.cn> <20140705060939.GA11739@flea.casa> <5881B5EA-B625-4E47-ADCB-3F2F894A8630@FreeBSD.org>
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δΊ 2014/07/05 20:57, Dimitry Andric ει: hi, Andric it still got BTX halted with your patched loader. and here is the new BTX picture http://sw.gddsn.org.cn/jopens/test/btx_edd.jpg TIA > On 05 Jul 2014, at 08:09, Arrigo Marchiori <ardovm@yahoo.it> wrote: >> 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 >>> 10.0-Release via freebsd-update. >>> and please check the link below: >>> http://sw.gddsn.org.cn/jopens/test/btx.jpg >>> >>> BTW: I can booted 10.0-R from DVD-ROM as expected but got same error >>> message with flash-driver. >> 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) = 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=176748 >> >> 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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