8:38 p.m.
Hello all,
When analysing elf format core, if "help -D" is specified, crash will
show dumpfile contents/statistics. But the output is hardly to read.
So the patches is to make it human readable.
When analysing kdump format core, if "help -D" is specified, crash won't
show the note information. The patches add note information to the output.
When analysing elf format core, if "help -D" is specified,
the original output like this:
:
:
Elf64_Nhdr:
n_namesz: 5 ("CORE")
n_descsz: 336
n_type: 1 (NT_PRSTATUS)
0000000000000000 0000000000000000
0000000000000000 0000000000000000
000000000000141d 0000000000000000
0000000000000000 0000000000000000
0000000000000000 0000000000000000
0000000000000000 0000000000000000
0000000000000000 0000000000000000
0000000000000004 0000000000000286
ffffffff81b01a40 0000000000000000
ffff88003d86be18 0000000000000063
0000000000000000 0000000000000001
ffffffff81645da0 0000000000000000
0000000000000010 0000000000000000
0000000000000000 0000000000000000
0000000000000063 ffffffffffffffff
ffffffff8134b6c6 0000000000000010
0000000000010096 ffff88003d86be18
0000000000000018 00007fc165c0b700
0000000000000000 0000000000000000
0000000000000000 0000000000000000
0000000000000000 0000000000000000
:
:
It is hardly to get some useful information. The patch is to make it
human readable. And the output changes to:
:
:
Elf64_Nhdr:
n_namesz: 5 ("CORE")
n_descsz: 336
n_type: 1 (NT_PRSTATUS)
si.signo: 0, si.code: 0, si.errno: 0, cursig:0
sigpend: 0
sighold: 0
pid: 5149, ppid: 0, pgrp: 0, sid:0
utime: 0.000000, stime: 0.000000, cutime: 0.000000, cstime: 0.000000
ORIG_RAX: -1, fpvalid: 0
R15 : 0x0000000000000004 R14 : 0x0000000000000286
R13 : 0xffffffff81b01a40 R12 : 0x0000000000000000
RBP : 0xffff88003d86be18 RBX : 0x0000000000000063
R11 : 0x0000000000000000 R10 : 0x0000000000000001
R9 : 0xffffffff81645da0 R8 : 0x0000000000000000
RAX : 0x0000000000000010 RCX : 0x0000000000000000
RDX : 0x0000000000000000 RSI : 0x0000000000000000
RDI : 0x0000000000000063 RIP : 0xffffffff8134b6c6
RFLAGS : 0x0000000000010096 RSP : 0xffff88003d86be18
FS_BASE: 0x00007fc165c0b700 GS_BASE : 0x0000000000000000
CS: 0x0010 SS: 0x0018 DS: 0x0000 ES: 0x0000 FS: 0x0000 GS: 0x0000
0000000000000000 0000000000000000
0000000000000000 0000000000000000
000000000000141d 0000000000000000
0000000000000000 0000000000000000
0000000000000000 0000000000000000
0000000000000000 0000000000000000
0000000000000000 0000000000000000
0000000000000004 0000000000000286
ffffffff81b01a40 0000000000000000
ffff88003d86be18 0000000000000063
0000000000000000 0000000000000001
ffffffff81645da0 0000000000000000
0000000000000010 0000000000000000
0000000000000000 0000000000000000
0000000000000063 ffffffffffffffff
ffffffff8134b6c6 0000000000000010
0000000000010096 ffff88003d86be18
0000000000000018 00007fc165c0b700
0000000000000000 0000000000000000
0000000000000000 0000000000000000
0000000000000000 0000000000000000
:
:
The patches support elf64, elf32, qemu64, qemu32 core format.
The kdump format didn't show the note information originally when help -D.
The patches add it.
the original output:
:
:
sub_header_kdump: 222aff0
phys_base: 0
dump_level: 0 (0x0)
split: 0
start_pfn: (unused)
end_pfn: (unused)
offset_vmcoreinfo: 4556 (0x11cc)
size_vmcoreinfo: 1440 (0x5a0)
OSRELEASE=2.6.32-431.el6.x86_64
PAGESIZE=4096
SYMBOL(init_uts_ns)=ffffffff81a8e940
SYMBOL(node_online_map)=ffffffff81c08f40
:
:
LENGTH(node_data)=512
CRASHTIME=1417488164
offset_note: 4176 (0x1050)
size_note: 1820 (0x71c)
num_prstatus_notes: 1
notes_buf: 224c020
notes[0]: 224c020
NT_PRSTATUS_offset: 1050
offset_eraseinfo: 0 (0x0)
size_eraseinfo: 0 (0x0)
:
:
the changed output:
:
:
sub_header_kdump: 2c75ff0
phys_base: 0
dump_level: 0 (0x0)
split: 0
start_pfn: (unused)
end_pfn: (unused)
offset_vmcoreinfo: 4556 (0x11cc)
size_vmcoreinfo: 1440 (0x5a0)
OSRELEASE=2.6.32-431.el6.x86_64
PAGESIZE=4096
SYMBOL(init_uts_ns)=ffffffff81a8e940
SYMBOL(node_online_map)=ffffffff81c08f40
:
:
LENGTH(node_data)=512
CRASHTIME=1417488164
offset_note: 4176 (0x1050)
size_note: 1820 (0x71c)
num_prstatus_notes: 1
notes_buf: 2c97020
notes[0]: 2c97020
si.signo: 0, si.code: 0, si.errno: 0, cursig:0
sigpend: 0
sighold: 0
pid: 5149, ppid: 0, pgrp: 0, sid:0
utime: 0.000000, stime: 0.000000, cutime: 0.000000, cstime: 0.000000
ORIG_RAX: -1, fpvalid: 0
R15 : 0x0000000000000004 R14 : 0x0000000000000286
R13 : 0xffffffff81b01a40 R12 : 0x0000000000000000
RBP : 0xffff88003d86be18 RBX : 0x0000000000000063
R11 : 0x0000000000000000 R10 : 0x0000000000000001
R9 : 0xffffffff81645da0 R8 : 0x0000000000000000
RAX : 0x0000000000000010 RCX : 0x0000000000000000
RDX : 0x0000000000000000 RSI : 0x0000000000000000
RDI : 0x0000000000000063 RIP : 0xffffffff8134b6c6
RFLAGS : 0x0000000000010096 RSP : 0xffff88003d86be18
FS_BASE: 0x00007fc165c0b700 GS_BASE : 0x0000000000000000
CS: 0x0010 SS: 0x0018 DS: 0x0000 ES: 0x0000 FS: 0x0000 GS: 0x0000
NT_PRSTATUS_offset: 1050
offset_eraseinfo: 0 (0x0)
size_eraseinfo: 0 (0x0)
:
:
--
Thanks
Zhou Wenjian