From mboxrd@z Thu Jan 1 00:00:00 1970 From: Keir Fraser Subject: Re: [PATCH 2/10] linux 2.6.18: COMPAT_VDSO Date: Mon, 05 Mar 2007 15:55:15 +0000 Message-ID: References: <45EC3BE9.76E4.0078.0@novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <45EC3BE9.76E4.0078.0@novell.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Jan Beulich , Keir Fraser Cc: xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org On 5/3/07 14:48, "Jan Beulich" wrote: > It's gonna be really old libc-s that need an absolutely invariable address. > But > you certainly recall that in 2.6.16 (and probably earlier) we had a hack to > map > it in right below PAGE_OFFSET, which worked too for not really new but also > not really old libc-s. It is those intermediate libc (supporting AT_SYSINFO > but > not AT_SYSINFO_EHDR) versions that the option attempts to address for > Xen. I happen to have a SuSE 9.0 system still in active use that doesn't work > without this option, and I think glibc 2.3.2 shouldn't be considered entirely > obsolete, yet. The build-system approach looks simplest (certainly smaller than the C code) but is impenetrable to read. I think we'd take that approach if you add some comments to explain what's going on in the makefile runes. -- Keir