gdb symbol problem

Hushan Jia hushan.jia@gmail.com
Mon Dec 28 04:14:00 GMT 2009


On Mon, Dec 28, 2009 at 10:38 AM, Jie Zhang <jie.zhang@analog.com> wrote:
> On 12/27/2009 11:45 AM, Hushan Jia wrote:
>>
>> On Sun, Dec 27, 2009 at 11:36 AM, Paul Pluzhnikov
>> <ppluzhnikov@google.com>  wrote:
>>>
>>> On Sat, Dec 26, 2009 at 6:16 PM, Hushan Jia<hushan.jia@gmail.com>  wrote:
>>>
>>>> I invoke gdb like this:
>>>>
>>>> [hushan@hushan-t linux-2.6.31.3]$ gdb ./vmlinux
>>>
>>> Oh, you are not debugging a regular application. You probably should
>>> have mentioned that in your initial message.
>>
>> Sorry for forget the important information.
>>
> What's the output of "readelf -S vmlinux"?

Hi, The output is:

# readelf -S vmlinux
There are 77 section headers, starting at offset 0x3b569cc:

Section Headers:
  [Nr] Name              Type            Addr     Off    Size   ES Flg Lk Inf Al
  [ 0]                   NULL            00000000 000000 000000 00      0   0  0
  [ 1] .text.head        PROGBITS        c1000000 001000 0000a9 00  AX  0   0  4
  [ 2] .rel.text.head    REL             00000000 3b575d4 000070 08
 75   1  4
  [ 3] .text             PROGBITS        c10000c0 0010c0 291284 00  AX  0   0 32
  [ 4] .rel.text         REL             00000000 3b57644 0c08f0 08
 75   3  4
  [ 5] __ex_table        PROGBITS        c1291350 292350 000fa8 00   A  0   0 16
  [ 6] .rel__ex_table    REL             00000000 3c17f34 001d78 08
 75   5  4
  [ 7] .rodata           PROGBITS        c1293000 294000 133f54 00   A  0   0 32
  [ 8] .rel.rodata       REL             00000000 3c19cac 05e620 08
 75   7  4
  [ 9] __bug_table       PROGBITS        c13c6f58 3c7f58 003f24 00   A  0   0  1
  [10] .rel__bug_table   REL             00000000 3c782cc 005430 08
 75   9  4
  [11] .pci_fixup        PROGBITS        c13cae7c 3cbe7c 000b38 00   A  0   0  4
  [12] .rel.pci_fixup    REL             00000000 3c7d6fc 000b38 08
 75  11  4
  [13] .builtin_fw       PROGBITS        c13cb9b4 3cc9b4 000090 00   A  0   0  4
  [14] .rel.builtin_fw   REL             00000000 3c7e234 0000c0 08
 75  13  4
  [15] __ksymtab         PROGBITS        c13cba44 3cca44 005ba8 00   A  0   0  4
  [16] .rel__ksymtab     REL             00000000 3c7e2f4 00b750 08
 75  15  4
  [17] __ksymtab_gpl     PROGBITS        c13d15ec 3d25ec 002890 00   A  0   0  4
  [18] .rel__ksymtab_gpl REL             00000000 3c89a44 005120 08
 75  17  4
  [19] __kcrctab         PROGBITS        c13d3e7c 3d4e7c 002dd4 00   A  0   0  4
  [20] .rel__kcrctab     REL             00000000 3c8eb64 005ba8 08
 75  19  4
  [21] __kcrctab_gpl     PROGBITS        c13d6c50 3d7c50 001448 00   A  0   0  4
  [22] .rel__kcrctab_gpl REL             00000000 3c9470c 002890 08
 75  21  4
  [23] __ksymtab_strings PROGBITS        c13d8098 3d9098 0126ab 00   A  0   0  1
  [24] __init_rodata     PROGBITS        c13ea760 3eb760 003780 00   A  0   0 32
  [25] .rel__init_rodata REL             00000000 3c96f9c 0003e8 08
 75  24  4
  [26] __param           PROGBITS        c13edee0 3eeee0 001120 00   A  0   0  4
  [27] .rel__param       REL             00000000 3c97384 001188 08
 75  26  4
  [28] .data             PROGBITS        c13ef000 3f0000 037498 00  WA
 0   0 4096
  [29] .rel.data         REL             00000000 3c9850c 012ed8 08
 75  28  4
  [30] .init.text        PROGBITS        c1427000 428000 029c3f 00  AX  0   0  1
  [31] .rel.init.text    REL             00000000 3cab3e4 019d70 08
 75  30  4
  [32] .init.data        PROGBITS        c1450c40 451c40 020967 00  WA  0   0 32
  [33] .rel.init.data    REL             00000000 3cc5154 001750 08
 75  32  4
  [34] .init.setup       PROGBITS        c14715b0 4725b0 0008dc 00  WA  0   0  4
  [35] .rel.init.setup   REL             00000000 3cc68a4 000bd0 08
 75  34  4
  [36] .initcall.init    PROGBITS        c1471e8c 472e8c 000554 00  WA  0   0  4
  [37] .rel.initcall.ini REL             00000000 3cc7474 000aa8 08
 75  36  4
  [38] .con_initcall.ini PROGBITS        c14723e0 4733e0 000008 00  WA  0   0  4
  [39] .rel.con_initcall REL             00000000 3cc7f1c 000010 08
 75  38  4
  [40] .x86_cpu_dev.init PROGBITS        c14723e8 4733e8 00001c 00   A  0   0  4
  [41] .rel.x86_cpu_dev. REL             00000000 3cc7f2c 000038 08
 75  40  4
  [42] .security_initcal PROGBITS        c1472404 473404 000004 00  WA  0   0  4
  [43] .rel.security_ini REL             00000000 3cc7f64 000008 08
 75  42  4
  [44] .altinstructions  PROGBITS        c1472408 473408 003be7 00   A  0   0  4
  [45] .rel.altinstructi REL             00000000 3cc7f6c 004fe0 08
 75  44  4
  [46] .altinstr_replace PROGBITS        c1475fef 476fef 000f4e 00  AX  0   0  1
  [47] .rel.altinstr_rep REL             00000000 3cccf4c 000038 08
 75  46  4
  [48] .exit.text        PROGBITS        c1476f3d 477f3d 000de6 00  AX  0   0  1
  [49] .rel.exit.text    REL             00000000 3cccf84 000e38 08
 75  48  4
  [50] .init.ramfs       PROGBITS        c1478000 479000 000200 00   A  0   0  1
  [51] .data.percpu      PROGBITS        c1479000 47a000 00a2dc 00  WA
 0   0 4096
  [52] .rel.data.percpu  REL             00000000 3ccddbc 000030 08
 75  51  4
  [53] .smp_locks        PROGBITS        c1484000 485000 006000 00   A  0   0  4
  [54] .rel.smp_locks    REL             00000000 3ccddec 00af80 08
 75  53  4
  [55] .bss              NOBITS          c148a000 48b000 0b9b74 00  WA
 0   0 4096
  [56] .brk              NOBITS          c1544000 48b000 125000 00  WA  0   0  1
  [57] .comment          PROGBITS        00000000 48b000 00cc7c 00      0   0  1
  [58] .debug_aranges    PROGBITS        00000000 497c80 00c290 00      0   0  8
  [59] .rel.debug_arange REL             00000000 3cd8d6c 007cc0 08
 75  58  4
  [60] .debug_pubnames   PROGBITS        00000000 4a3f10 042264 00      0   0  1
  [61] .rel.debug_pubnam REL             00000000 3ce0a2c 002380 08
 75  60  4
  [62] .debug_info       PROGBITS        00000000 4e6174 2d12647 00
  0   0  1
  [63] .rel.debug_info   REL             00000000 3ce2dac 147dfc0 08
  75  62  4
  [64] .debug_abbrev     PROGBITS        00000000 31f87bb 14652a 00
  0   0  1
  [65] .debug_line       PROGBITS        00000000 333ece5 29597c 00
  0   0  1
  [66] .rel.debug_line   REL             00000000 5160d6c 003fd8 08
 75  65  4
  [67] .debug_frame      PROGBITS        00000000 35d4664 095fa0 00
  0   0  4
  [68] .rel.debug_frame  REL             00000000 5164d44 046040 08
 75  67  4
  [69] .debug_str        PROGBITS        00000000 366a604 123fab 01
MS  0   0  1
  [70] .debug_loc        PROGBITS        00000000 378e5af 3376f1 00
  0   0  1
  [71] .rel.debug_loc    REL             00000000 51aad84 243820 08
 75  70  4
  [72] .debug_ranges     PROGBITS        00000000 3ac5ca0 090a98 00
  0   0  1
  [73] .rel.debug_ranges REL             00000000 53ee5a4 090d30 08
 75  72  4
  [74] .shstrtab         STRTAB          00000000 3b56738 000291 00
  0   0  1
  [75] .symtab           SYMTAB          00000000 547f2d4 0adf20 10
 76 30275  4
  [76] .strtab           STRTAB          00000000 552d1f4 0eb2f9 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)

>
>
> Jie
>



-- 
Thanks & Regards,
Hushan Jia



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