25 Nov
2010
25 Nov
'10
7:33 a.m.
On 11/25/2010 01:31 PM, dotnetdub wrote:
There are 36 section headers, starting at offset 0x17b34:
Section Headers:
[Nr] Name Type Addr Off Size ES Flg
Lk Inf Al
[ 0] NULL 00000000 000000 000000 00
0 0 0
[ 1] .hash HASH 000000b4 0000b4 000498 04 A
3 0 4
[ 2] .gnu.hash GNU_HASH 0000054c 00054c 0002d8 04 A
3 0 4
[ 3] .dynsym DYNSYM 00000824 000824 000650 10 A
4 1 4
[ 4] .dynstr STRTAB 00000e74 000e74 000581 00 A
0 0 1
[ 5] .gnu.version VERSYM 000013f6 0013f6 0000ca 02 A
3 0 2
[ 6] .gnu.version_r VERNEED 000014c0 0014c0 000030 00 A
4 1 4
[ 7] .rel.dyn REL 000014f0 0014f0 0001d0 08 A
3 0 4
[ 8] .rel.plt REL 000016c0 0016c0 000210 08 A
3 10 4
[ 9] .init PROGBITS 000018d0 0018d0 000030 00 AX
0 0 4
[10] .plt PROGBITS 00001900 001900 000430 04 AX
0 0 4
[11] .text PROGBITS 00001d30 001d30 0080d8 00 AX
0 0 16
[12] .fini PROGBITS 00009e08 009e08 00001c 00 AX
0 0 4
[13] .rodata PROGBITS 00009e24 009e24 001618 01 AMS
0 0 4
[14] .eh_frame PROGBITS 0000b43c 00b43c 000004 00 A
0 0 4
[15] .ctors PROGBITS 0000c440 00b440 000008 00 WA
0 0 4
[16] .dtors PROGBITS 0000c448 00b448 000008 00 WA
0 0 4
[17] .jcr PROGBITS 0000c450 00b450 000004 00 WA
0 0 4
[18] .dynamic DYNAMIC 0000c454 00b454 0000c8 08 WA
4 0 4
[19] .got PROGBITS 0000c51c 00b51c 00006c 04 WA
0 0 4
[20] .got.plt PROGBITS 0000c588 00b588 000114 04 WA
0 0 4
[21] .data PROGBITS 0000c6a0 00b6a0 00012c 00 WA
0 0 32
[22] .bss NOBITS 0000c7e0 00b7cc 0004a0 00 WA
0 0 32
[23] .comment PROGBITS 00000000 00b7cc 0000d9 00
0 0 1
[24] .debug_aranges PROGBITS 00000000 00b8a8 0000b0 00
0 0 8
[25] .debug_pubnames PROGBITS 00000000 00b958 000448 00
0 0 1
[26] .debug_info PROGBITS 00000000 00bda0 005dd1 00
0 0 1
[27] .debug_abbrev PROGBITS 00000000 011b71 0007a8 00
0 0 1
[28] .debug_line PROGBITS 00000000 012319 0014b9 00
0 0 1
[29] .debug_frame PROGBITS 00000000 0137d4 0004b0 00
0 0 4
[30] .debug_str PROGBITS 00000000 013c84 001d76 01 MS
0 0 1
[31] .debug_loc PROGBITS 00000000 0159fa 001ebe 00
0 0 1
[32] .debug_ranges PROGBITS 00000000 0178b8 000140 00
0 0 8
[33] .shstrtab STRTAB 00000000 0179f8 00013b 00
0 0 1
[34] .symtab SYMTAB 00000000 0180d4 0009e0 10
35 58 4
[35] .strtab STRTAB 00000000 018ab4 0006ec 00
0 0 1
Key to Flags:
W (write), A (alloc), X (execute), M (merge), S (strings)
I (info), L (link order), G (group), x (unknown)
O (extra OS processing required) o (OS specific), p (processor specific)
in the gdb console load the topoh.so
add-symbol-file /path/to/topoh.so 0xb7004000 + 0x<offset of .text
segment found as above>
Ok.
Hello
Did you give gdb the command
add-symbol-file /path/to/topoh.so 0xb7004000+0x00001d30
Gdb should inquire you if you want to lead topoh.so at offset 0xb7005d30
(press 'y'). Then the IP should not be out of bounds ... it should be
mapped to the topoh.so text segment. Ah, I have made a mistake, there
should be no spaces between the address and the offset (as seen above)
Anyway you should get something like this (on my machine - on your use
the offsets from above)
(gdb) add-symbol-file modules/topoh/topoh.so 0xb7004000+0x00001d80
add symbol table from file "modules/topoh/topoh.so" at
.text_addr = 0xb7005d80
(y or n) y
Reading symbols from
/home/marius/dev/sip-router/modules/topoh/topoh.so...done.
Then
(gdb) x/s 0xb70070d9
!!!!!!!!!!!!!!!!!!0xb70070d9 <th_get_hdr_cookie+25>: <Address 0xb70070d9
out of bounds>!!!!!!!!!!!!!!!!!
The line between all the !!!!!! is the line I care about
Also don't forget
(gdb)info registers
Thank you
Marius