From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from az33egw01.freescale.net (az33egw01.freescale.net [192.88.158.102]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "az33egw01.freescale.net", Issuer "Thawte Premium Server CA" (verified OK)) by ozlabs.org (Postfix) with ESMTP id E1952DDDF4 for ; Wed, 20 Feb 2008 09:51:55 +1100 (EST) Message-ID: <47BB5D82.6070806@freescale.com> Date: Tue, 19 Feb 2008 16:51:46 -0600 From: Timur Tabi MIME-Version: 1.0 To: linuxppc-dev@ozlabs.org, lkml Subject: Difference between vmlinux and vmlinux.bin Content-Type: text/plain; charset=ISO-8859-1; format=flowed List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , I'm trying to write an ELF loader for a PowerPC vmlinux, and I've come across something I don't understand. In vmlinux, there are two Program Segments, the first of which is PT_LOAD. What is the difference between the block of data inside this section, and vmlinux.bin? I thought that vmlinux.bin is nothing more than the PT_LOAD section of vmlinux. However, when I do a memcmp, there is a difference at offset 3080192 (vmlinux.bin is 4874532 bytes long): memcmp @ 3080192 125 != 31 32 bytes @ 412f0000: 7d 20 00 28 31 29 ff ff 7d 20 01 2d 40 a2 ff f4 2f 89 00 00 41 9e 01 9c 7f e3 fb 78 4b d7 b0 75 32 bytes @ 42300000: 1f 8b 08 08 b7 e7 7a 44 00 03 62 75 73 79 62 6f 78 2d 31 2e 31 2e 33 2e 69 6d 67 00 ec 5d 7d 74 So when Kbuild creates vmlinux.bin, what does it do besides extract the PT_LOAD segment? -- Timur Tabi Linux kernel developer at Freescale