Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S267250AbTGHLiT (ORCPT ); Tue, 8 Jul 2003 07:38:19 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S267256AbTGHLiS (ORCPT ); Tue, 8 Jul 2003 07:38:18 -0400 Received: from chaos.analogic.com ([204.178.40.224]:37508 "EHLO chaos.analogic.com") by vger.kernel.org with ESMTP id S267250AbTGHLiR (ORCPT ); Tue, 8 Jul 2003 07:38:17 -0400 Date: Tue, 8 Jul 2003 07:54:26 -0400 (EDT) From: "Richard B. Johnson" X-X-Sender: root@chaos Reply-To: root@chaos.analogic.com To: Jamie Lokier cc: Linux kernel Subject: Re: syscall __NR_mmap2 In-Reply-To: <20030708003656.GC12127@mail.jlokier.co.uk> Message-ID: References: <20030708003656.GC12127@mail.jlokier.co.uk> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1062 Lines: 32 On Tue, 8 Jul 2003, Jamie Lokier wrote: > Richard B. Johnson wrote: > > mmap2(0xb8000, 8192, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_FIXED, 3, 0xb8000) = 0xb8000 > > You meant to write: > > mmap2(0xb8000, 8192, PROT_READ|PROT_WRITE, > MAP_SHARED|MAP_FIXED, 3, 0xb8000 >> 12); > > The offset argument to mmap2 is divided by PAGE_SIZE. > That is the whole point of mmap2 :) > > -- Jamie Okay. Do you know where that's documented? Nothing in linux/Documentation, and nothing in any headers. Do you have to read the code to find out? So, the address is now the offset in PAGES, not bytes. Seems logical, but there is no clue in any documentation. Cheers, Dick Johnson Penguin : Linux version 2.4.20 on an i686 machine (797.90 BogoMips). Why is the government concerned about the lunatic fringe? Think about it. - 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/