From: "Yinghai Lu" <yinghai.lu@amd.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: "Andi Kleen" <ak@suse.de>, Horms <horms@verge.net.au>,
"Jan Kratochvil" <lace@jankratochvil.net>,
"H. Peter Anvin" <hpa@zytor.com>,
"Magnus Damm" <magnus.damm@gmail.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 32/33] x86_64: Relocatable kernel support
Date: Sat, 4 Nov 2006 23:15:57 -0800 [thread overview]
Message-ID: <86802c440611042315m2c923fccmeec6b3fa1448780a@mail.gmail.com> (raw)
In-Reply-To: <m1zmb6per0.fsf@ebiederm.dsl.xmission.com>
On 11/4/06, Eric W. Biederman <ebiederm@xmission.com> wrote:
> If you are booting a vmlinux you read the ELF header. The ELF header
> only describes the native mode. Therefore no 32bit entry makes much sense.
>
Yes, but if you keep the startup_32 and it will be at 0x200000, and
startup_64 will be 0x200100. and entry point in ELF header is
0x200100.
by removing startup_32, startup_64 will be 0x200000. and entry point
in ehdr is 0x200000.
So I assume entry_point in elf_header could be used by 64bit
bootloader and phdr[1].p_addr could be used by 32bit boot loader.
YH
ELF Header:
Magic: 7f 45 4c 46 02 01 01 00 00 00 00 00 00 00 00 00
Class: ELF64
Data: 2's complement, little endian
Version: 1 (current)
OS/ABI: UNIX - System V
ABI Version: 0
Type: EXEC (Executable file)
Machine: Advanced Micro Devices X86-64
Version: 0x1
Entry point address: 0x200100
Start of program headers: 64 (bytes into file)
Start of section headers: 7192496 (bytes into file)
Flags: 0x0
Size of this header: 64 (bytes)
Size of program headers: 56 (bytes)
Number of program headers: 5
Size of section headers: 64 (bytes)
Number of section headers: 42
Section header string table index: 39
Program Headers:
Type Offset VirtAddr PhysAddr
FileSiz MemSiz Flags Align
LOAD 0x0000000000100000 0xffffffff80200000 0x0000000000200000
0x000000000032f508 0x000000000032f508 R E 100000
LOAD 0x0000000000430000 0xffffffff80530000 0x0000000000530000
0x0000000000148ec8 0x0000000000148ec8 RWE 100000
LOAD 0x0000000000600000 0xffffffffff600000 0x0000000000679000
0x0000000000000c08 0x0000000000000c08 RWE 100000
LOAD 0x000000000067a000 0xffffffff8067a000 0x000000000067a000
0x000000000005dd68 0x00000000000e91c8 RWE 100000
NOTE 0x0000000000000000 0x0000000000000000 0x0000000000000000
0x0000000000000000 0x0000000000000000 R 8
next prev parent reply other threads:[~2006-11-05 7:16 UTC|newest]
Thread overview: 105+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-01 10:58 [RFC] ELF Relocatable x86 and x86_64 bzImages Eric W. Biederman
2006-08-01 11:03 ` [PATCH 1/33] i386: vmlinux.lds.S Distinguish absolute symbols Eric W. Biederman
2006-08-01 19:06 ` Sam Ravnborg
2006-08-01 11:03 ` [PATCH 2/33] i386: define __pa_symbol Eric W. Biederman
2006-08-01 19:06 ` Andi Kleen
2006-08-02 2:19 ` Eric W. Biederman
2006-08-02 3:04 ` Andi Kleen
2006-08-01 11:03 ` [PATCH 3/33] i386 setup.c: Reserve kernel memory starting from _text Eric W. Biederman
2006-08-01 11:03 ` [PATCH 4/33] i386: CONFIG_PHYSICAL_START cleanup Eric W. Biederman
2006-08-01 19:08 ` Sam Ravnborg
2006-08-02 2:23 ` Eric W. Biederman
2006-08-02 16:14 ` Eric W. Biederman
2006-08-03 14:05 ` Sam Ravnborg
2006-08-01 11:03 ` [PATCH 5/33] i386 Kconfig: Add a range definition to config PHYSICAL_START Eric W. Biederman
2006-08-01 11:03 ` [PATCH 6/33] Make linux/elf.h safe to be included in assembly files Eric W. Biederman
2006-08-01 11:03 ` [PATCH 7/33] elf: Add ELFOSABI_STANDALONE to elf.h Eric W. Biederman
2006-08-01 11:03 ` [PATCH 8/33] kallsyms.c: Generate relocatable symbols Eric W. Biederman
2006-08-01 11:36 ` Paulo Marques
2006-08-01 11:52 ` Eric W. Biederman
2006-08-01 11:03 ` [PATCH 9/33] i386 boot: Add serial output support to the decompressor Eric W. Biederman
2006-08-01 19:19 ` Andi Kleen
2006-08-02 2:30 ` Eric W. Biederman
2006-08-02 3:07 ` Andi Kleen
2006-08-02 4:57 ` Eric W. Biederman
2006-08-02 5:21 ` Andi Kleen
2006-08-02 6:44 ` Eric W. Biederman
2006-08-02 3:06 ` Eric W. Biederman
2006-08-02 3:10 ` Andi Kleen
2006-08-02 5:27 ` Eric W. Biederman
2006-08-02 5:44 ` Andi Kleen
2006-08-02 7:14 ` Eric W. Biederman
2006-08-01 11:03 ` [PATCH 10/33] i386: Relocatable kernel support Eric W. Biederman
2006-08-01 13:34 ` Mika Penttilä
2006-08-01 18:07 ` Eric W. Biederman
2006-08-01 18:11 ` Sam Ravnborg
2006-08-01 18:16 ` Mika Penttilä
2006-08-01 11:03 ` [PATCH 11/33] i386 boot: Add an ELF header to bzImage Eric W. Biederman
2006-08-01 22:10 ` Jeremy Fitzhardinge
2006-08-02 2:38 ` Eric W. Biederman
2006-08-01 11:03 ` [PATCH 12/33] x86_64: fixup indentation in e820.c Eric W. Biederman
2006-08-01 11:03 ` [PATCH 13/33] x86_64: Remove assumptions about the kernel start address from e820/bad_addr() Eric W. Biederman
2006-08-01 11:03 ` [PATCH 14/33] x86_64: Properly report in /proc/iomem the kernel address Eric W. Biederman
2006-08-01 11:03 ` [PATCH 15/33] x86_64: Fix kernel direct mapping size check Eric W. Biederman
2006-08-01 11:03 ` [PATCH 16/33] x86_64: Assembly safe page.h and pgtable.h Eric W. Biederman
2006-08-01 11:03 ` [PATCH 17/33] x86_64: Separate normal memory map initialization from the hotplug case Eric W. Biederman
2006-08-01 11:03 ` [PATCH 18/33] x86_64: Kill temp_boot_pmds Eric W. Biederman
2006-08-01 19:02 ` Andi Kleen
2006-08-02 2:08 ` Eric W. Biederman
2006-08-01 19:04 ` [PATCH 18/33] x86_64: Kill temp_boot_pmds II Andi Kleen
2006-08-02 2:11 ` Eric W. Biederman
2006-08-02 3:07 ` Andi Kleen
2006-08-02 5:35 ` Eric W. Biederman
2006-08-01 11:03 ` [PATCH 19/33] x86_64: Cleanup the early boot page table Eric W. Biederman
2006-08-01 11:03 ` [PATCH 20/33] x86_64: fix early_printk to use the standard ISA mapping Eric W. Biederman
2006-08-01 11:03 ` [PATCH 21/33] x86_64: modify copy_bootdata to use virtual addresses Eric W. Biederman
2006-08-01 11:03 ` [PATCH 22/33] x86_64: Fix gdt table size in trampoline.S Eric W. Biederman
2006-08-01 18:59 ` Andi Kleen
2006-08-01 11:03 ` [PATCH 23/33] x86_64: cleanup segments Eric W. Biederman
2006-08-01 11:03 ` [PATCH 24/33] x86_64: Add EFER to the set registers saved by save_processor_state Eric W. Biederman
2006-08-01 11:03 ` [PATCH 25/33] x86_64: 64bit PIC SMP trampoline Eric W. Biederman
2006-08-01 19:13 ` Andi Kleen
2006-08-01 11:03 ` [PATCH 26/33] x86_64: 64bit PIC ACPI wakeup Eric W. Biederman
2006-08-01 19:10 ` Andi Kleen
2006-08-01 11:03 ` [PATCH 27/33] x86_64: Modify discover_ebda to use virtual addresses Eric W. Biederman
2006-08-01 11:03 ` [PATCH 28/33] x86_64: Remove the identity mapping as early as possible Eric W. Biederman
2006-08-01 19:15 ` Andi Kleen
2006-08-01 11:03 ` [PATCH 29/33] x86_64: __pa and __pa_symbol address space separation Eric W. Biederman
2006-08-01 11:03 ` [PATCH 30/33] x86_64: Remove CONFIG_PHYSICAL_START Eric W. Biederman
2006-08-01 11:03 ` [PATCH 31/33] x86_64 boot: Add serial output support to the decompressor Eric W. Biederman
2006-08-01 11:03 ` [PATCH 32/33] x86_64: Relocatable kernel support Eric W. Biederman
2006-08-01 19:11 ` Andi Kleen
2006-08-02 2:25 ` Eric W. Biederman
2006-11-05 6:02 ` Yinghai Lu
2006-11-05 6:52 ` Eric W. Biederman
2006-11-05 7:15 ` Yinghai Lu [this message]
2006-08-01 11:03 ` [PATCH 33/33] x86_64: Make bzImage a valid 64bit elf executable Eric W. Biederman
2006-08-01 19:26 ` [RFC] ELF Relocatable x86 and x86_64 bzImages Vivek Goyal
2006-08-01 20:13 ` Jan Kratochvil
2006-08-01 20:25 ` H. Peter Anvin
2006-08-02 2:02 ` Eric W. Biederman
2006-08-01 20:40 ` Vivek Goyal
2006-08-02 2:40 ` Eric W. Biederman
2006-08-02 6:34 ` Magnus Damm
2006-08-02 7:09 ` Eric W. Biederman
2006-08-02 8:34 ` Magnus Damm
2006-08-02 9:59 ` Eric W. Biederman
2006-08-02 18:37 ` [Fastboot] " Don Zickus
2006-08-03 1:00 ` Eric W. Biederman
2006-08-03 4:53 ` H. Peter Anvin
2006-08-04 22:56 ` Vivek Goyal
2006-08-04 23:14 ` Eric W. Biederman
2006-08-04 23:38 ` Dave Jones
2006-08-04 23:47 ` H. Peter Anvin
2006-08-05 8:01 ` Eric W. Biederman
2006-08-08 3:34 ` Horms
2006-08-08 4:32 ` H. Peter Anvin
2006-08-08 4:57 ` Magnus Damm
2006-08-08 5:04 ` Eric W. Biederman
2006-08-08 6:09 ` Horms
2006-08-08 7:23 ` Eric W. Biederman
2006-08-08 7:58 ` Horms
2006-08-09 14:56 ` D. Hazelton
2006-08-17 18:44 ` Vivek Goyal
2006-08-11 13:11 ` [Fastboot] " Rachita Kothiyal
2006-08-11 13:36 ` Vivek Goyal
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