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Hi, Thanks for the clarifications. Just had 1 more question. Can I port binaries built on RHEL 3/Opteron(2.4.21) to SLES 9/Opteron (2.6.5-7.252) and run without any issues? Thanks Rajib -----Original Message----- From: Alan Cox [mailto:alan@lxorguk.ukuu.org.uk] Sent: 08 June 2006 22:51 To: Jan Engelhardt Cc: Majumder, Rajib; 'linux-kernel@vger.kernel.org' Subject: Re: binary portability Ar Iau, 2006-06-08 am 12:42 +0200, ysgrifennodd Jan Engelhardt: > >I know that EM64T and AMD64 are ISA compatible, but there could be some > >differences in ELF32 between these 2 processor architectures. > > > What differences? (Apart from MMXEXT and SSE2,SSE3) There are multiple ISA differences that affect ring 0 (kernel code), but only one nasty that hit user code with early Intel clones. The early Intel clones didn't implement the prefetch instructions that are mandatory in x86-64. This broke a few apps early on but they got workarounds very fast. If the code is built for the generic instruction set (as is the case unless you try very hard) then it should be perfect on both. Alan ============================================================================== Please access the attached hyperlink for an important electronic communications disclaimer: http://www.credit-suisse.com/legal/en/disclaimer_email_ib.html ============================================================================== - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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