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Open Source and information security mailing list archives
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Date: Sat, 9 Feb 2008 14:34:30 -0800 From: Arjan van de Ven <arjan@...radead.org> To: Jan Engelhardt <jengelh@...putergmbh.de> Cc: Alejandro Riveira Fernández <ariveira@...il.com>, Ray Lee <ray-lk@...rabbit.org>, Pavel Machek <pavel@....cz>, kernel list <linux-kernel@...r.kernel.org>, jikos@...e.cz Subject: Re: how to tell i386 from x86-64 kernel On Sat, 9 Feb 2008 21:13:43 +0100 (CET) Jan Engelhardt <jengelh@...putergmbh.de> wrote: > > On Feb 1 2008 12:53, Alejandro Riveira Fernández wrote: > >> > >> # uname -m > >> I won't tell you. > >> # linux32 uname -m > >> i686 > > > > Ubuntu 7.10 64 bit userland 2.6.24 > > > >$ uname -m > >x86_64 > >$ linux32 uname -m > >i686 > > What I am saying is that uname(2) does not reliably tell you whether > you have a 64-bit kernel underneath unless you have other sources of > information. that's sort of a rabbit-and-the-frog problem. The 32 bit emulator tries to look EXACTLY like the 32 bit kernel, and it really should. If someone wants a method to detect even that... we would really want to know the exact usecase.. because very likely it's the wrong answer to some other problem ;-) -- If you want to reach me at my work email, use arjan@...ux.intel.com For development, discussion and tips for power savings, visit http://www.lesswatts.org -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.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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