readelf -s实例 ---helloworld

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[root@localhost test]# readelf -s helloworld

Symbol table '.dynsym' contains 5 entries:
   Num:    Value Size Type    Bind   Vis      Ndx Name
     0: 00000000     0 NOTYPE LOCAL DEFAULT UND
     1: 00000000     0 NOTYPE WEAK   DEFAULT UND __gmon_start__
     2: 00000000     0 FUNC    GLOBAL DEFAULT UND __libc_start_main@GLIBC_2.0 (2)
     3: 00000000     0 FUNC    GLOBAL DEFAULT UND printf@GLIBC_2.0 (2)
     4: 0804849c     4 OBJECT GLOBAL DEFAULT   15 _IO_stdin_used

Symbol table '.symtab' contains 65 entries:
   Num:    Value Size Type    Bind   Vis      Ndx Name
     0: 00000000     0 NOTYPE LOCAL DEFAULT UND
     1: 08048134     0 SECTION LOCAL DEFAULT    1
     2: 08048148     0 SECTION LOCAL DEFAULT    2
     3: 08048168     0 SECTION LOCAL DEFAULT    3
     4: 0804818c     0 SECTION LOCAL DEFAULT    4
     5: 080481ac     0 SECTION LOCAL DEFAULT    5
     6: 080481fc     0 SECTION LOCAL DEFAULT    6
     7: 08048248     0 SECTION LOCAL DEFAULT    7
     8: 08048254     0 SECTION LOCAL DEFAULT    8
     9: 08048274     0 SECTION LOCAL DEFAULT    9
    10: 0804827c     0 SECTION LOCAL DEFAULT   10
    11: 08048294     0 SECTION LOCAL DEFAULT   11
    12: 080482c4     0 SECTION LOCAL DEFAULT   12
    13: 08048310     0 SECTION LOCAL DEFAULT   13
    14: 0804847c     0 SECTION LOCAL DEFAULT   14
    15: 08048498     0 SECTION LOCAL DEFAULT   15
    16: 080484b4     0 SECTION LOCAL DEFAULT   16
    17: 080484d0     0 SECTION LOCAL DEFAULT   17
    18: 08049528     0 SECTION LOCAL DEFAULT   18
    19: 08049530     0 SECTION LOCAL DEFAULT   19
    20: 08049538     0 SECTION LOCAL DEFAULT   20
    21: 0804953c     0 SECTION LOCAL DEFAULT   21
    22: 08049604     0 SECTION LOCAL DEFAULT   22
    23: 08049608     0 SECTION LOCAL DEFAULT   23
    24: 08049620     0 SECTION LOCAL DEFAULT   24
    25: 08049624     0 SECTION LOCAL DEFAULT   25
    26: 00000000     0 SECTION LOCAL DEFAULT   26
    27: 00000000     0 FILE    LOCAL DEFAULT ABS crtstuff.c
    28: 08049528     0 OBJECT LOCAL DEFAULT   18 __CTOR_LIST__
    29: 08049530     0 OBJECT LOCAL DEFAULT   19 __DTOR_LIST__
    30: 08049538     0 OBJECT LOCAL DEFAULT   20 __JCR_LIST__
    31: 08048340     0 FUNC    LOCAL DEFAULT   13 __do_global_dtors_aux
    32: 08049624     1 OBJECT LOCAL DEFAULT   25 completed.5921
    33: 08049628     4 OBJECT LOCAL DEFAULT   25 dtor_idx.5923
    34: 080483a0     0 FUNC    LOCAL DEFAULT   13 frame_dummy
    35: 00000000     0 FILE    LOCAL DEFAULT ABS crtstuff.c
    36: 0804952c     0 OBJECT LOCAL DEFAULT   18 __CTOR_END__
    37: 08048524     0 OBJECT LOCAL DEFAULT   17 __FRAME_END__
    38: 08049538     0 OBJECT LOCAL DEFAULT   20 __JCR_END__
    39: 08048450     0 FUNC    LOCAL DEFAULT   13 __do_global_ctors_aux
    40: 00000000     0 FILE    LOCAL DEFAULT ABS helloworld.c
    41: 08049608     0 OBJECT LOCAL HIDDEN   23 _GLOBAL_OFFSET_TABLE_
    42: 08049528     0 NOTYPE LOCAL HIDDEN   18 __init_array_end
    43: 08049528     0 NOTYPE LOCAL HIDDEN   18 __init_array_start
    44: 0804953c     0 OBJECT LOCAL HIDDEN   21 _DYNAMIC
    45: 08049620     0 NOTYPE WEAK   DEFAULT   24 data_start
    46: 080483e0     5 FUNC    GLOBAL DEFAULT   13 __libc_csu_fini
    47: 08048310     0 FUNC    GLOBAL DEFAULT   13 _start
    48: 00000000     0 NOTYPE WEAK   DEFAULT UND __gmon_start__
    49: 00000000     0 NOTYPE WEAK   DEFAULT UND _Jv_RegisterClasses
    50: 08048498     4 OBJECT GLOBAL DEFAULT   15 _fp_hw
    51: 0804847c     0 FUNC    GLOBAL DEFAULT   14 _fini
    52: 00000000     0 FUNC    GLOBAL DEFAULT UND __libc_start_main@@GLIBC_
    53: 0804849c     4 OBJECT GLOBAL DEFAULT   15 _IO_stdin_used
    54: 08049620     0 NOTYPE GLOBAL DEFAULT   24 __data_start
    55: 080484a0     0 OBJECT GLOBAL HIDDEN   15 __dso_handle
    56: 08049534     0 OBJECT GLOBAL HIDDEN   19 __DTOR_END__
    57: 080483f0    90 FUNC    GLOBAL DEFAULT   13 __libc_csu_init
    58: 00000000     0 FUNC    GLOBAL DEFAULT UND printf@@GLIBC_2.0
    59: 08049624     0 NOTYPE GLOBAL DEFAULT ABS __bss_start
    60: 0804962c     0 NOTYPE GLOBAL DEFAULT ABS _end
    61: 08049624     0 NOTYPE GLOBAL DEFAULT ABS _edata
    62: 0804844a     0 FUNC    GLOBAL HIDDEN   13 __i686.get_pc_thunk.bx
    63: 080483c4    24 FUNC    GLOBAL DEFAULT   13 main
    64: 08048294     0 FUNC    GLOBAL DEFAULT   11 _init
[root@localhost test]#