[Crash-utility] diskdump/x86_64 crash compatibility.
Neil Horman
nhorman at redhat.com
Thu Oct 13 17:31:46 UTC 2005
On Thu, Oct 13, 2005 at 01:07:41PM -0400, Dave Anderson wrote:
> Neil Horman wrote:
>
> > Hey all-
> > If I have a RHEL4 crash dump taken from an AMD x86_64 machine, should I
> > be able to examine that vmcore using crash-4.0.1 on a RHEL4 box running on EM64T
> > hardware? I would have assumed that I would be able to, but I keep getting file
> > format errors when trying to read the core.
> > Neil
> >
>
> Yes, it should. What's the output look like?
>
Here it is. About the only things that stand out to is that the PARTIAL_DUMP
flag is set in the ELF header. I wouldn't think a partial dump would have
produced this error message however, since the ELF and program headers are all
still in tact.
Neil
crash 4.0-2.6
Copyright (C) 2002, 2003, 2004, 2005 Red Hat, Inc.
Copyright (C) 2004, 2005 IBM Corporation
Copyright (C) 1999-2005 Hewlett-Packard Co
Copyright (C) 1999, 2002 Silicon Graphics, Inc.
Copyright (C) 1999, 2000, 2001, 2002 Mission Critical Linux, Inc.
This program is free software, covered by the GNU General Public License,
and you are welcome to change it and/or distribute copies of it under
certain conditions. Enter "help copying" to see the conditions.
This program has absolutely no warranty. Enter "help warranty" for details.
vmcore_data:
flags: 19 (NETDUMP_LOCAL|NETDUMP_ELF64|PARTIAL_DUMP)
ndfd: 3
ofp: 3a20c2d8c0
header_size: 4096
num_pt_load_segments: 2
pt_load_segment[0]:
file_offset: 1000
phys_start: 0
phys_end: e0000000
pt_load_segment[1]:
file_offset: e0001000
phys_start: 100000000
phys_end: 120000000
elf_header: 901c70
elf32: 0
notes32: 0
load32: 0
elf64: 901c70
notes64: 901cb0
load64: 901ce8
nt_prstatus: 901d58
nt_prpsinfo: 901eb8
nt_taskstruct: 901f50
task_struct: 10041f697f0
page_size: 4096
switch_stack: 0
num_prstatus_notes: 1
nt_prstatus_percpu: 0000000000901d58
Elf64_Ehdr:
e_ident: \177ELF
e_ident[EI_CLASS]: 2 (ELFCLASS64)
e_ident[EI_DATA]: 1 (ELFDATA2LSB)
e_ident[EI_VERSION]: 1 (EV_CURRENT)
e_ident[EI_OSABI]: 0 (ELFOSABI_SYSV)
e_ident[EI_ABIVERSION]: 0
e_type: 4 (ET_CORE)
e_machine: 62 (EM_X86_64)
e_version: 1 (EV_CURRENT)
e_entry: 0
e_phoff: 40
e_shoff: 0
e_flags: 0
e_ehsize: 40
e_phentsize: 38
e_phnum: 3
e_shentsize: 0
e_shnum: 0
e_shstrndx: 0
Elf64_Phdr:
p_type: 4 (PT_NOTE)
p_offset: 232 (e8)
p_vaddr: 0
p_paddr: 0
p_filesz: 556 (22c)
p_memsz: 0 (0)
p_flags: 0 ()
p_align: 0
Elf64_Phdr:
p_type: 1 (PT_LOAD)
p_offset: 4096 (1000)
p_vaddr: 10000000000
p_paddr: 0
p_filesz: 3758096384 (e0000000)
p_memsz: 3758096384 (e0000000)
p_flags: 7 (PF_X|PF_W|PF_R)
p_align: 4096
Elf64_Phdr:
p_type: 1 (PT_LOAD)
p_offset: 3758100480 (e0001000)
p_vaddr: 10100000000
p_paddr: 100000000
p_filesz: 536870912 (20000000)
p_memsz: 536870912 (20000000)
p_flags: 7 (PF_X|PF_W|PF_R)
p_align: 4096
Elf64_Nhdr:
n_namesz: 4 ("CORE")
n_descsz: 336
n_type: 1 (NT_PRSTATUS)
0000000000000000 0000000000000000
0000000000000000 0000000000000000
0000000000000000 0000000000000000
0000000000000000 0000000000000000
0000000000000000 0000000000000000
0000000000000000 0000000000000000
0000000000000000 0000000000000000
0000000000000003 0000007fbffffad0
000001011fada244 0000000000000004
00000000000001c7 000001011fada240
0000000000000246 0000007fbffff201
0000007fbffff760 0000007fbffff508
000001011fada370 0000007fbffff201
0000000000000004 0000010111a49ef8
000001011fada244 ffffffffffffffff
ffffffff80177cf8 0000000000000010
0000000000010202 0000010111a49ea0
0000000000000018 0000002a9589fb00
0000000000000000 0000000000000000
0000000000000000 0000000000000000
0000000000000000 0000000000000000
Elf64_Nhdr:
n_namesz: 4 ("CORE")
n_descsz: 136
n_type: 3 (NT_PRPSINFO)
0000000000005200 0000000000000000
0000000000000000 0000000000000000
0000000000000000 0078756e696c6d76
0000000000000000 0000000000000000
0000000000000000 0000000000000000
0000000000000000 0000000000000000
0000000000000000 0000000000000000
0000000000000000 0000000000000000
0000000000000000
Elf64_Nhdr:
n_namesz: 4 ("CORE")
n_descsz: 16
n_type: 4 (NT_TASKSTRUCT)
0000010041f697f0 0000000000000000
Elf64_Nhdr:
n_namesz: 4 ("CORE")
n_descsz: 4
n_type: 70000001 (NT_DISKDUMP)
00000001
crash: /boot/vmlinuz-2.6.9-22.ELsmp: not a supported file format
Usage:
crash [-h [opt]][-v][-s][-i file][-d num] [-S] [mapfile] [namelist] [dumpfile]
Enter "crash -h" for details.
> Dave
>
>
> >
> > --
> > /***************************************************
> > *Neil Horman
> > *Software Engineer
> > *Red Hat, Inc.
> > *nhorman at redhat.com
> > *gpg keyid: 1024D / 0x92A74FA1
> > *http://pgp.mit.edu
> > ***************************************************/
> >
> > --
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>
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--
/***************************************************
*Neil Horman
*Software Engineer
*Red Hat, Inc.
*nhorman at redhat.com
*gpg keyid: 1024D / 0x92A74FA1
*http://pgp.mit.edu
***************************************************/
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