From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030550AbXFHQgV (ORCPT ); Fri, 8 Jun 2007 12:36:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S969333AbXFHQgB (ORCPT ); Fri, 8 Jun 2007 12:36:01 -0400 Received: from rwcrmhc12.comcast.net ([216.148.227.152]:44120 "EHLO rwcrmhc12.comcast.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S969246AbXFHQgB (ORCPT ); Fri, 8 Jun 2007 12:36:01 -0400 Subject: Re: JIT emulator needs From: Nicholas Miell To: Alan Cox Cc: Albert Cahalan , linux-kernel In-Reply-To: <20070608121059.4efcd338@the-village.bc.nu> References: <787b0d920706072335v10d6025cwe1437194b6c60d84@mail.gmail.com> <20070608121059.4efcd338@the-village.bc.nu> Content-Type: text/plain Date: Fri, 08 Jun 2007 09:35:59 -0700 Message-Id: <1181320559.2794.4.camel@entropy> Mime-Version: 1.0 X-Mailer: Evolution 2.10.1 (2.10.1-4.fc7.0.njm.1) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2007-06-08 at 12:10 +0100, Alan Cox wrote: > > e. mremap() flag to get a read/write mapping of a read/exec one > > f. mremap() flag to get a read/exec mapping of a read/write one > > g. mremap() flag to make the 5th arg (new addr) be the upper limit > > This is all mprotect and munmap. I think he's asking for a way to copy an existing mapping, which does sound genuinely useful. (i.e. mremap(ptr, size, size, MREMAP_COPY), with no need to mess with files to get multiple mappings of the same region) -- Nicholas Miell