Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261621AbVASHmE (ORCPT ); Wed, 19 Jan 2005 02:42:04 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261650AbVASHky (ORCPT ); Wed, 19 Jan 2005 02:40:54 -0500 Received: from ebiederm.dsl.xmission.com ([166.70.28.69]:50367 "EHLO ebiederm.dsl.xmission.com") by vger.kernel.org with ESMTP id S261621AbVASHdN (ORCPT ); Wed, 19 Jan 2005 02:33:13 -0500 From: "Eric W. Biederman" To: Andrew Morton Cc: , Subject: [PATCH 9/29] x86-vmlinux-fix-physical-addrs Date: Wed, 19 Jan 2005 0:31:37 -0700 Message-ID: X-Mailer: patch-bomb.pl@ebiederm.dsl.xmission.com In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5453 Lines: 171 The vmlinux on i386 does not report the correct physical address of the kernel. Instead in the physical address field it currently reports the virtual address of the kernel. This is patch is a bug fix that corrects vmlinux to report the proper physical addresses. This is potentially a help for crash dump analysis tools. This definitiely allows bootloaders that load vmlinux as a standard ELF executable. Bootloaders directly loading vmlinux become of practical importance when we consider the kexec on panic case. Signed-off-by: Eric Biederman --- vmlinux.lds.S | 59 +++++++++++++++++++++++++++++++++++++--------------------- 1 files changed, 38 insertions(+), 21 deletions(-) diff -uNr linux-2.6.11-rc1-mm1-nokexec-vmlinux-fix-physical-addrs/arch/i386/kernel/vmlinux.lds.S linux-2.6.11-rc1-mm1-nokexec-x86-vmlinux-fix-physical-addrs/arch/i386/kernel/vmlinux.lds.S --- linux-2.6.11-rc1-mm1-nokexec-vmlinux-fix-physical-addrs/arch/i386/kernel/vmlinux.lds.S Mon Oct 18 15:53:43 2004 +++ linux-2.6.11-rc1-mm1-nokexec-x86-vmlinux-fix-physical-addrs/arch/i386/kernel/vmlinux.lds.S Tue Jan 18 22:45:51 2005 @@ -2,20 +2,23 @@ * Written by Martin Mares ; */ +#define LOAD_OFFSET __PAGE_OFFSET + #include #include #include OUTPUT_FORMAT("elf32-i386", "elf32-i386", "elf32-i386") OUTPUT_ARCH(i386) -ENTRY(startup_32) +ENTRY(phys_startup_32) jiffies = jiffies_64; SECTIONS { - . = __PAGE_OFFSET + 0x100000; + . = LOAD_OFFSET + 0x100000; + phys_startup_32 = startup_32 - LOAD_OFFSET; /* read-only */ _text = .; /* Text and read-only data */ - .text : { + .text : AT(ADDR(.text) - LOAD_OFFSET) { *(.text) SCHED_TEXT LOCK_TEXT @@ -27,49 +30,55 @@ . = ALIGN(16); /* Exception table */ __start___ex_table = .; - __ex_table : { *(__ex_table) } + __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { *(__ex_table) } __stop___ex_table = .; RODATA /* writeable */ - .data : { /* Data */ + .data : AT(ADDR(.data) - LOAD_OFFSET) { /* Data */ *(.data) CONSTRUCTORS } . = ALIGN(4096); __nosave_begin = .; - .data_nosave : { *(.data.nosave) } + .data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) { *(.data.nosave) } . = ALIGN(4096); __nosave_end = .; . = ALIGN(4096); - .data.page_aligned : { *(.data.idt) } + .data.page_aligned : AT(ADDR(.data.page_aligned) - LOAD_OFFSET) { + *(.data.idt) + } . = ALIGN(32); - .data.cacheline_aligned : { *(.data.cacheline_aligned) } + .data.cacheline_aligned : AT(ADDR(.data.cacheline_aligned) - LOAD_OFFSET) { + *(.data.cacheline_aligned) + } _edata = .; /* End of data section */ . = ALIGN(THREAD_SIZE); /* init_task */ - .data.init_task : { *(.data.init_task) } + .data.init_task : AT(ADDR(.data.init_task) - LOAD_OFFSET) { + *(.data.init_task) + } /* will be freed after init */ . = ALIGN(4096); /* Init code and data */ __init_begin = .; - .init.text : { + .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { _sinittext = .; *(.init.text) _einittext = .; } - .init.data : { *(.init.data) } + .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { *(.init.data) } . = ALIGN(16); __setup_start = .; - .init.setup : { *(.init.setup) } + .init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) { *(.init.setup) } __setup_end = .; __initcall_start = .; - .initcall.init : { + .initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) { *(.initcall1.init) *(.initcall2.init) *(.initcall3.init) @@ -80,33 +89,41 @@ } __initcall_end = .; __con_initcall_start = .; - .con_initcall.init : { *(.con_initcall.init) } + .con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) { + *(.con_initcall.init) + } __con_initcall_end = .; SECURITY_INIT . = ALIGN(4); __alt_instructions = .; - .altinstructions : { *(.altinstructions) } + .altinstructions : AT(ADDR(.altinstructions) - LOAD_OFFSET) { + *(.altinstructions) + } __alt_instructions_end = .; - .altinstr_replacement : { *(.altinstr_replacement) } + .altinstr_replacement : AT(ADDR(.altinstr_replacement) - LOAD_OFFSET) { + *(.altinstr_replacement) + } /* .exit.text is discard at runtime, not link time, to deal with references from .altinstructions and .eh_frame */ - .exit.text : { *(.exit.text) } - .exit.data : { *(.exit.data) } + .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) { *(.exit.text) } + .exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) { *(.exit.data) } . = ALIGN(4096); __initramfs_start = .; - .init.ramfs : { *(.init.ramfs) } + .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) { *(.init.ramfs) } __initramfs_end = .; . = ALIGN(32); __per_cpu_start = .; - .data.percpu : { *(.data.percpu) } + .data.percpu : AT(ADDR(.data.percpu) - LOAD_OFFSET) { *(.data.percpu) } __per_cpu_end = .; . = ALIGN(4096); __init_end = .; /* freed after init ends here */ __bss_start = .; /* BSS */ - .bss : { + .bss.page_aligned : AT(ADDR(.bss.page_aligned) - LOAD_OFFSET) { *(.bss.page_aligned) + } + .bss : AT(ADDR(.bss) - LOAD_OFFSET) { *(.bss) } . = ALIGN(4); - 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/