Date: Mon, 23 Feb 2015 02:03:19 +0000 From: Ken Moffat <zarniwhoop@ntlworld.com> To: jd1008 <jd1008@gmail.com> Cc: freebsd-questions@freebsd.org Subject: Re: why would I get a segmentation fault on one system but not the other? Message-ID: <20150223020319.GA9764@milliways> In-Reply-To: <54EA83F2.5000103@gmail.com> References: <20150222091956.fd1ec914.freebsd@edvax.de> <20150222104425.GA44573@home.parts-unknown.org> <9134.76.193.19.10.1424620110.squirrel@cosmo.uchicago.edu> <590FB195-C4E9-4D22-8900-ABE784CE9896@parts-unknown.org> <20150222205918.GA68253@home.parts-unknown.org> <11537.76.193.19.10.1424641383.squirrel@cosmo.uchicago.edu> <20150222234849.GA44067@home.parts-unknown.org> <20150223001433.GB7342@milliways> <20150223011123.GB48633@home.parts-unknown.org> <54EA83F2.5000103@gmail.com>
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On Sun, Feb 22, 2015 at 06:35:46PM -0700, jd1008 wrote: > > On 02/22/2015 06:11 PM, David Benfell wrote: > >On Mon, Feb 23, 2015 at 12:14:33AM +0000, Ken Moffat wrote: > > > > > >This all Greek to me. Perhaps a diff will help: > > > Well, I see this fundamental difference: > > > <Features2=0x7ffafbff<SSE3,PCLMULQDQ,DTES64,MON,DS_CPL,VMX,SMX,EST,TM2,SSSE3,<b11>,FMA,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,TSCDLT,AESNI,XSAVE,OSXSAVE,AVX,F16C,RDRAND> > > >Features2=0x7fdafbbf<SSE3,PCLMULQDQ,DTES64,MON,DS_CPL,VMX, > ,EST,TM2,SSSE3,<b11>,FMA,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2, > ,MOVBE,POPCNT,TSCDLT,AESNI,XSAVE,OSXSAVE,AVX,F16C,RDRAND> > > The 2nd line is lacking cpu features SMX and x2APIC > I have not dabbled in compilers for many years, but one OP already mentioned > the possibility of differences in AMD 64 architecture instruction generation > by the C compiler. If they are the same as on linux, SMX is the same as TPM (Trusted Platform Module), i.e. a crypto processor, and x2APIC is the newest programmable interrupt controller - both explained on wikipedia. Neither appear to be related to the minor sse3 variations which gave me problems on linux, so I think I took the thread off at a tangent. ĸen -- Nanny Ogg usually went to bed early. After all, she was an old lady. Sometimes she went to bed as early as 6 a.m.
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