ld与链接脚本

最新推荐文章于 2024-11-03 14:00:50 发布

原创最新推荐文章于 2024-11-03 14:00:50 发布 · 1.3k 阅读

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CC 4.0 BY-SA版权

文章标签：

#object #wildcard #table #file #debugging #linker

本文介绍了如何通过ld链接脚本来解决固定内存地址问题，以i386_linux.lds为例，详细解析了链接脚本的各个部分，包括数据段的对齐、重定位节、符号表等，旨在帮助读者理解链接过程和内存布局。

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这几天正要解决一个固定内存地址问题，有如下程序：

test.c:
----------------------------------------------------------------------------------------------------
#include <stdio.h>

extern unsigned char __bootarea_start[];
extern unsigned char __bootarea_end[];
void get_bootarea_addr(unsigned char **addr_start, unsigned int *size)
{
*addr_start = __bootarea_start;
*size = (__bootarea_end - __bootarea_start);
}
/* 即每次开机或重新编译连接，该函数返回的地址和大小都是固定不变的 */

int main(int argc, char **argv)
{
unsigned char *bootarea_addr = NULL; //, *ptr;
unsigned int size = 0;
unsigned int i;

get_bootarea_addr(&bootarea_addr, &size);
printf("bootarea_addr = %p, size = %x/n", bootarea_addr, size);
for(i = 0; i < size; i++) { bootarea_addr[i] = i; }

return 0;
}
----------------------------------------------------------------------------------------------------

i386-linux平台链接脚本如下：i386_linux.lds
----------------------------------------------------------------------------------------------------
/*
==================================================
GNU ld version 2.17.50.0.6-6.el5 20061020
Supported emulations:
elf_i386
i386linux
using internal linker script:
==================================================
*/

/* Script for -z combreloc: combine and sort reloc sections */
OUTPUT_FORMAT("elf32-i386", "elf32-i386",
       "elf32-i386")
OUTPUT_ARCH(i386)
ENTRY(_start)
SEARCH_DIR("/usr/i386-redhat-linux/lib"); SEARCH_DIR("/usr/local/lib"); SEARCH_DIR("/lib"); SEARCH_DIR("/usr/lib");
SECTIONS
{
/* Read-only sections, merged into text segment: */
/* PROVIDE (__executable_start = 0x08048000); . = 0x08048000 + SIZEOF_HEADERS; */
PROVIDE (__executable_start = 0x000008000); . = 0x00008000 + 1024;
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      *(.rel.tdata .rel.tdata.* .rel.gnu.linkonce.td.*)
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.rel.plt        : { *(.rel.plt) }
.rela.plt       : { *(.rela.plt) }
.init           :
{
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} =0x90909090
.plt            : { *(.plt) }
.text           :
{
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    KEEP (*(.text.*personality*))
    /* .gnu.warning sections are handled specially by elf32.em. */
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} =0x90909090
.fini           :
{
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} =0x90909090
PROVIDE (__etext = .);
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. = DATA_SEGMENT_ALIGN (CONSTANT (MAXPAGESIZE), CONSTANT (COMMONPAGESIZE));
*/
. = ALIGN (0x8000) - ((0x8000 - .) & (0x8000 - 1));
. = DATA_SEGMENT_ALIGN (0x8000, 0x1000);

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     PROVIDE_HIDDEN (__init_array_start = .);
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    KEEP (*(SORT(.ctors.*)))
    KEEP (*(.ctors))
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.dtors          :
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    KEEP (*crtbegin?.o(.dtors))
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    KEEP (*(.dtors))
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. = DATA_SEGMENT_RELRO_END (12, .);
.got.plt        : { *(.got.plt) }
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_edata = .; PROVIDE (edata = .);
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   . = ALIGN(. != 0 ? 32 / 8 : 1);
}
. = ALIGN(32 / 8);
. = ALIGN(32 / 8);
_end = .; PROVIDE (end = .);
. = DATA_SEGMENT_END (.);
/* Stabs debugging sections. */

. = 0x80000000;
.bootarea :
{
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    . = . + 0x500000;
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}

.stab          0 : { *(.stab) }
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.debug_ranges   0 : { *(.debug_ranges) }
/DISCARD/ : { *(.note.GNU-stack) }
}
----------------------------------------------------------------------------------------------------

arm-linux平台链接脚本如下： arm_linux.lds
----------------------------------------------------------------------------------------------------
/*
==================================================
GNU ld version 2.16.91 20050627
Supported emulations:
armelf_linux
armelf
using internal linker script:
==================================================
*/

/* Script for -z combreloc: combine and sort reloc sections */
OUTPUT_FORMAT("elf32-littlearm", "elf32-bigarm",
       "elf32-littlearm")
OUTPUT_ARCH(arm)
ENTRY(_start)
SEARCH_DIR("=/usr/local/lib"); SEARCH_DIR("=/lib"); SEARCH_DIR("=/usr/lib");
/* Do we need any of these for elf?
   __DYNAMIC = 0;    */
SECTIONS
{
/* Read-only sections, merged into text segment: */
PROVIDE (__executable_start = 0x00008000); . = 0x00008000 + 1024;
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/* Adjust the address for the data segment. We want to adjust up to
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----------------------------------------------------------------------------------------------------

然后使用如下命令编译连接：
----------------------------------------------------------------------------------------------------
ld -Wall -O2 -Wl,-Ti386_linux.lds -o i386_test test.c
arm-uclibc-linux-ld -Wall -O2 -Wl,-Tarm_linux.lds -o arm_test test.c
----------------------------------------------------------------------------------------------------

运行结果如下：
----------------------------------------------------------------------------------------------------
i386_linux平台： bootarea_addr = 0x80000000, size = 500000
arm_linux平台：直接killed
----------------------------------------------------------------------------------------------------

i386_linux readelf -a结果如下：
----------------------------------------------------------------------------------------------------
ELF Header:
Magic:   7f 45 4c 46 01 01 01 00 00 00 00 00 00 00 00 00
Class:                             ELF32
Data:                              2's complement, little endian
Version:                           1 (current)
OS/ABI:                            UNIX - System V
ABI Version:                       0
Type:                              EXEC (Executable file)
Machine:                           Intel 80386
Version:                           0x1
Entry point address:               0x85a0
Start of program headers:          52 (bytes into file)
Start of section headers:          2812 (bytes into file)
Flags:                             0x0
Size of this header:               52 (bytes)
Size of program headers:           32 (bytes)
Number of program headers:         8
Size of section headers:           40 (bytes)
Number of section headers:         29
Section header string table index: 26

Section Headers:
[Nr] Name              Type            Addr     Off    Size   ES Flg Lk Inf Al
[ 0]                   NULL            00000000 000000 000000 00      0   0 0
[ 1] .interp           PROGBITS        00008400 000400 000013 00   A 0   0 1
[ 2] .note.ABI-tag     NOTE            00008414 000414 000020 00   A 0   0 4
[ 3] .gnu.hash         GNU_HASH        00008434 000434 000020 04   A 4   0 4
[ 4] .dynsym           DYNSYM          00008454 000454 000050 10   A 5   1 4
[ 5] .dynstr           STRTAB          000084a4 0004a4 00004c 00   A 0   0 1
[ 6] .gnu.version      VERSYM          000084f0 0004f0 00000a 02   A 4   0 2
[ 7] .gnu.version_r    VERNEED         000084fc 0004fc 000020 00   A 5   1 4
[ 8] .rel.dyn          REL             0000851c 00051c 000008 08   A 4   0 4
[ 9] .rel.plt          REL             00008524 000524 000018 08   A 4 11 4
[10] .init             PROGBITS        0000853c 00053c 000017 00 AX 0   0 4
[11] .plt              PROGBITS        00008554 000554 000040 04 AX 0   0 4
[12] .text             PROGBITS        000085a0 0005a0 000218 00 AX 0   0 16
[13] .fini             PROGBITS        000087b8 0007b8 00001c 00 AX 0   0 4
[14] .rodata           PROGBITS        000087d4 0007d4 00002c 00   A 0   0 4
[15] .eh_frame         PROGBITS        00008800 000800 000004 00   A 0   0 4
[16] .ctors            PROGBITS        00010804 000804 000008 00 WA 0   0 4
[17] .dtors            PROGBITS        0001080c 00080c 000008 00 WA 0   0 4
[18] .jcr              PROGBITS        00010814 000814 000004 00 WA 0   0 4
[19] .dynamic          DYNAMIC         00010818 000818 0000c8 08 WA 5   0 4
[20] .got              PROGBITS        000108e0 0008e0 000004 04 WA 0   0 4
[21] .got.plt          PROGBITS        000108e4 0008e4 000018 04 WA 0   0 4
[22] .data             PROGBITS        000108fc 0008fc 000004 00 WA 0   0 4
[23] .bss              NOBITS          00010900 000900 000008 00 WA 0   0 4
[24] .bootarea         NOBITS          80000000 000000 500000 00 WA 0   0 1
[25] .comment          PROGBITS        00000000 000900 000114 00      0   0 1
[26] .shstrtab         STRTAB          00000000 000a14 0000e5 00      0   0 1
[27] .symtab           SYMTAB          00000000 000f84 000480 10     28 49 4
[28] .strtab           STRTAB          00000000 001404 00028c 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)

There are no section groups in this file.

Program Headers:
Type           Offset   VirtAddr   PhysAddr   FileSiz MemSiz Flg Align
PHDR           0x000034 0x00008034 0x00008034 0x00100 0x00100 R E 0x4
INTERP         0x000400 0x00008400 0x00008400 0x00013 0x00013 R   0x1
      [Requesting program interpreter: /lib/ld-linux.so.2]
LOAD           0x000000 0x00008000 0x00008000 0x00804 0x00804 R E 0x1000
LOAD           0x000804 0x00010804 0x00010804 0x000fc 0x00104 RW 0x1000
LOAD           0x000000 0x80000000 0x80000000 0x00000 0x500000 RW 0x1000
DYNAMIC        0x000818 0x00010818 0x00010818 0x000c8 0x000c8 RW 0x4
NOTE           0x000414 0x00008414 0x00008414 0x00020 0x00020 R   0x4
GNU_STACK      0x000000 0x00000000 0x00000000 0x00000 0x00000 RW 0x4

Section to Segment mapping:
Segment Sections...
   00
   01     .interp
   02     .interp .note.ABI-tag .gnu.hash .dynsym .dynstr .gnu.version .gnu.version_r .rel.dyn .rel.plt .init .plt .text .fini .rodata .eh_frame
   03     .ctors .dtors .jcr .dynamic .got .got.plt .data .bss
   04     .bootarea
   05     .dynamic
   06     .note.ABI-tag
   07

Dynamic section at offset 0x818 contains 20 entries:
Tag        Type                         Name/Value
0x00000001 (NEEDED)                     Shared library: [libc.so.6]
0x0000000c (INIT)                       0x853c
0x0000000d (FINI)                       0x87b8
0x6ffffef5 (GNU_HASH)                   0x8434
0x00000005 (STRTAB)                     0x84a4
0x00000006 (SYMTAB)                     0x8454
0x0000000a (STRSZ)                      76 (bytes)
0x0000000b (SYMENT)                     16 (bytes)
0x00000015 (DEBUG)                      0x0
0x00000003 (PLTGOT)                     0x108e4
0x00000002 (PLTRELSZ)                   24 (bytes)
0x00000014 (PLTREL)                     REL
0x00000017 (JMPREL)                     0x8524
0x00000011 (REL)                        0x851c
0x00000012 (RELSZ)                      8 (bytes)
0x00000013 (RELENT)                     8 (bytes)
0x6ffffffe (VERNEED)                    0x84fc
0x6fffffff (VERNEEDNUM)                 1
0x6ffffff0 (VERSYM)                     0x84f0
0x00000000 (NULL)                       0x0

Relocation section '.rel.dyn' at offset 0x51c contains 1 entries:
Offset Info Type Sym.Value Sym. Name
000108e0 00000106 R_386_GLOB_DAT 00000000 __gmon_start__

Relocation section '.rel.plt' at offset 0x524 contains 3 entries:
Offset     Info    Type            Sym.Value Sym. Name
000108f0 00000107 R_386_JUMP_SLOT   00000000   __gmon_start__
000108f4 00000207 R_386_JUMP_SLOT   00000000   __libc_start_main
000108f8 00000307 R_386_JUMP_SLOT   00000000   printf

There are no unwind sections in this file.

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   415 FUNC    GLOBAL DEFAULT UND __libc_start_main@GLIBC_2.0 (2)
     3: 00000000    57 FUNC    GLOBAL DEFAULT UND printf@GLIBC_2.0 (2)
     4: 000087d8     4 OBJECT GLOBAL DEFAULT   14 _IO_stdin_used

Symbol table '.symtab' contains 72 entries:
   Num:    Value Size Type    Bind   Vis      Ndx Name
     0: 00000000     0 NOTYPE LOCAL DEFAULT UND
     1: 00008400     0 SECTION LOCAL DEFAULT    1
     2: 00008414     0 SECTION LOCAL DEFAULT    2
     3: 00008434     0 SECTION LOCAL DEFAULT    3
     4: 00008454     0 SECTION LOCAL DEFAULT    4
     5: 000084a4     0 SECTION LOCAL DEFAULT    5
     6: 000084f0     0 SECTION LOCAL DEFAULT    6
     7: 000084fc     0 SECTION LOCAL DEFAULT    7
     8: 0000851c     0 SECTION LOCAL DEFAULT    8
     9: 00008524     0 SECTION LOCAL DEFAULT    9
    10: 0000853c     0 SECTION LOCAL DEFAULT   10
    11: 00008554     0 SECTION LOCAL DEFAULT   11
    12: 000085a0     0 SECTION LOCAL DEFAULT   12
    13: 000087b8     0 SECTION LOCAL DEFAULT   13
    14: 000087d4     0 SECTION LOCAL DEFAULT   14
    15: 00008800     0 SECTION LOCAL DEFAULT   15
    16: 00010804     0 SECTION LOCAL DEFAULT   16
    17: 0001080c     0 SECTION LOCAL DEFAULT   17
    18: 00010814     0 SECTION LOCAL DEFAULT   18
    19: 00010818     0 SECTION LOCAL DEFAULT   19
    20: 000108e0     0 SECTION LOCAL DEFAULT   20
    21: 000108e4     0 SECTION LOCAL DEFAULT   21
    22: 000108fc     0 SECTION LOCAL DEFAULT   22
    23: 00010900     0 SECTION LOCAL DEFAULT   23
    24: 80000000     0 SECTION LOCAL DEFAULT   24
    25: 00000000     0 SECTION LOCAL DEFAULT   25
    26: 000085c4     0 FUNC    LOCAL DEFAULT   12 call_gmon_start
    27: 00000000     0 FILE    LOCAL DEFAULT ABS crtstuff.c
    28: 00010804     0 OBJECT LOCAL DEFAULT   16 __CTOR_LIST__
    29: 0001080c     0 OBJECT LOCAL DEFAULT   17 __DTOR_LIST__
    30: 00010814     0 OBJECT LOCAL DEFAULT   18 __JCR_LIST__
    31: 00010900     4 OBJECT LOCAL DEFAULT   23 dtor_idx.5790
    32: 00010904     1 OBJECT LOCAL DEFAULT   23 completed.5788
    33: 000085f0     0 FUNC    LOCAL DEFAULT   12 __do_global_dtors_aux
    34: 00008650     0 FUNC    LOCAL DEFAULT   12 frame_dummy
    35: 00000000     0 FILE    LOCAL DEFAULT ABS crtstuff.c
    36: 00010808     0 OBJECT LOCAL DEFAULT   16 __CTOR_END__
    37: 00008800     0 OBJECT LOCAL DEFAULT   15 __FRAME_END__
    38: 00010814     0 OBJECT LOCAL DEFAULT   18 __JCR_END__
    39: 00008790     0 FUNC    LOCAL DEFAULT   12 __do_global_ctors_aux
    40: 00000000     0 FILE    LOCAL DEFAULT ABS addr.c
    41: 00010804     0 NOTYPE LOCAL HIDDEN   16 __preinit_array_start
    42: 00010804     0 NOTYPE LOCAL HIDDEN   16 __fini_array_end
    43: 000108e4     0 OBJECT LOCAL HIDDEN   21 _GLOBAL_OFFSET_TABLE_
    44: 00010804     0 NOTYPE LOCAL HIDDEN   16 __preinit_array_end
    45: 00010804     0 NOTYPE LOCAL HIDDEN   16 __fini_array_start
    46: 00010804     0 NOTYPE LOCAL HIDDEN   16 __init_array_end
    47: 00010804     0 NOTYPE LOCAL HIDDEN   16 __init_array_start
    48: 00010818     0 OBJECT LOCAL HIDDEN   19 _DYNAMIC
    49: 000108fc     0 NOTYPE WEAK   DEFAULT   22 data_start
    50: 00008710     5 FUNC    GLOBAL DEFAULT   12 __libc_csu_fini
    51: 000085a0     0 FUNC    GLOBAL DEFAULT   12 _start
    52: 00000000     0 NOTYPE WEAK   DEFAULT UND __gmon_start__
    53: 00000000     0 NOTYPE WEAK   DEFAULT UND _Jv_RegisterClasses
    54: 000087d4     4 OBJECT GLOBAL DEFAULT   14 _fp_hw
    55: 000087b8     0 FUNC    GLOBAL DEFAULT   13 _fini
    56: 00000000   415 FUNC    GLOBAL DEFAULT UND __libc_start_main@@GLIBC_
    57: 80500000     0 NOTYPE GLOBAL DEFAULT   24 __bootarea_end
    58: 000087d8     4 OBJECT GLOBAL DEFAULT   14 _IO_stdin_used
    59: 000108fc     0 NOTYPE GLOBAL DEFAULT   22 __data_start
    60: 000087dc     0 OBJECT GLOBAL HIDDEN   14 __dso_handle
    61: 00010810     0 OBJECT GLOBAL HIDDEN   17 __DTOR_END__
    62: 00008720   105 FUNC    GLOBAL DEFAULT   12 __libc_csu_init
    63: 00000000    57 FUNC    GLOBAL DEFAULT UND printf@@GLIBC_2.0
    64: 00008680    29 FUNC    GLOBAL DEFAULT   12 get_bootarea_addr
    65: 00010900     0 NOTYPE GLOBAL DEFAULT ABS __bss_start
    66: 80000000     0 NOTYPE GLOBAL DEFAULT   24 __bootarea_start
    67: 00010908     0 NOTYPE GLOBAL DEFAULT ABS _end
    68: 00010900     0 NOTYPE GLOBAL DEFAULT ABS _edata
    69: 00008789     0 FUNC    GLOBAL HIDDEN   12 __i686.get_pc_thunk.bx
    70: 000086a0   109 FUNC    GLOBAL DEFAULT   12 main
    71: 0000853c     0 FUNC    GLOBAL DEFAULT   10 _init

Histogram for `.gnu.hash' bucket list length (total of 2 buckets):
Length Number     % of total Coverage
      0 1          ( 50.0%)
      1 1          ( 50.0%)    100.0%

Version symbols section '.gnu.version' contains 5 entries:
Addr: 00000000000084f0 Offset: 0x0004f0 Link: 4 (.dynsym)
000: 0 (*local*) 0 (*local*) 2 (GLIBC_2.0) 2 (GLIBC_2.0)
004: 1 (*global*)

Version needs section '.gnu.version_r' contains 1 entries:
Addr: 0x00000000000084fc Offset: 0x0004fc Link to section: 5 (.dynstr)
000000: Version: 1 File: libc.so.6 Cnt: 1
0x0010: Name: GLIBC_2.0 Flags: none Version: 2

Notes at offset 0x00000414 with length 0x00000020:
Owner Data size Description
GNU 0x00000010 NT_VERSION (version)
----------------------------------------------------------------------------------------------------

arm-uclibc-linux-readelf -a结果如下：
----------------------------------------------------------------------------------------------------
ELF 头：
Magic： 7f 45 4c 46 01 01 01 61 00 00 00 00 00 00 00 00
Class:                             ELF32
Data:                              2's complement, little endian
Version:                           1 (current)
OS/ABI:                            ARM
ABI Version:                       0
Type:                              EXEC (可执行文件)
Machine:                           ARM
Version:                           0x1
入口点地址：              0x86bc
程序头起点：              52 (bytes into file)
Start of section headers:          2876 (bytes into file)
标志：             0x202, has entry point, GNU EABI, software FP
本头的大小：       52 (字节)
程序头大小：       32 (字节)
程序头数量：       7
节头大小：         40 (字节)
节头数量：         25
字符串表索引节头： 22

节头：
[Nr] Name              Type            Addr     Off    Size   ES Flg Lk Inf Al
[ 0]                   NULL            00000000 000000 000000 00      0   0 0
[ 1] .interp           PROGBITS        00008400 000400 000014 00   A 0   0 1
[ 2] .hash             HASH            00008414 000414 000090 04   A 3   0 4
[ 3] .dynsym           DYNSYM          000084a4 0004a4 000110 10   A 4   1 4
[ 4] .dynstr           STRTAB          000085b4 0005b4 000090 00   A 0   0 1
[ 5] .rel.dyn          REL             00008644 000644 000018 08   A 3   0 4
[ 6] .rel.plt          REL             0000865c 00065c 000018 08   A 3   8 4
[ 7] .init             PROGBITS        00008674 000674 000010 00 AX 0   0 4
[ 8] .plt              PROGBITS        00008684 000684 000038 04 AX 0   0 4
[ 9] .text             PROGBITS        000086bc 0006bc 000198 00 AX 0   0 4
[10] .fini             PROGBITS        00008854 000854 00000c 00 AX 0   0 4
[11] .rodata           PROGBITS        00008860 000860 000020 01 AMS 0   0 4
[12] .eh_frame         PROGBITS        00008880 000880 000004 00   A 0   0 4
[13] .ctors            PROGBITS        00010884 000884 000008 00 WA 0   0 4
[14] .dtors            PROGBITS        0001088c 00088c 000008 00 WA 0   0 4
[15] .jcr              PROGBITS        00010894 000894 000004 00 WA 0   0 4
[16] .dynamic          DYNAMIC         00010898 000898 0000b0 08 WA 4   0 4
[17] .got              PROGBITS        00010948 000948 000024 04 WA 0   0 4
[18] .data             PROGBITS        0001096c 00096c 000014 00 WA 0   0 4
[19] .bss              NOBITS          00010980 000980 000004 00 WA 0   0 1
[20] .bootarea         NOBITS          80000000 000980 500000 00 WA 0   0 1 --> [b][color=#FF0000]why the offset of segment bootarea is 0x980?[/color][/b]
[21] .comment          PROGBITS        00000000 000980 00010c 00      0   0 1
[22] .shstrtab         STRTAB          00000000 000a8c 0000ae 00      0   0 1
[23] .symtab           SYMTAB          00000000 000f24 0005a0 10     24 68 4
[24] .strtab           STRTAB          00000000 0014c4 0001fd 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)

There are no section groups in this file.

程序头：
Type           Offset   VirtAddr   PhysAddr   FileSiz MemSiz Flg Align
PHDR           0x000034 0x00008034 0x00008034 0x000e0 0x000e0 R E 0x4
INTERP         0x000400 0x00008400 0x00008400 0x00014 0x00014 R   0x1
      [正在请求程序解释器：/lib/ld-uClibc.so.0]
LOAD           0x000000 0x00008000 0x00008000 0x00884 0x00884 R E 0x8000
LOAD           0x000884 0x00010884 0x00010884 0x000fc 0x00100 RW 0x8000
LOAD           0x000000 0x80000000 0x80000000 0x00000 0x500000 RW 0x8000
DYNAMIC        0x000898 0x00010898 0x00010898 0x000b0 0x000b0 RW 0x4
GNU_STACK      0x000000 0x00000000 0x00000000 0x00000 0x00000 RWE 0x4

Section to Segment mapping:
段节...
   00
   01     .interp
   02     .interp .hash .dynsym .dynstr .rel.dyn .rel.plt .init .plt .text .fini .rodata .eh_frame
   03     .ctors .dtors .jcr .dynamic .got .data .bss
   04     .bootarea
   05     .dynamic
   06

Dynamic section at offset 0x898 contains 17 entries:
标记        类型                         名称/值
0x00000001 (NEEDED)                     共享库：[libc.so.0]
0x0000000c (INIT)                       0x8674
0x0000000d (FINI)                       0x8854
0x00000004 (HASH)                       0x8414
0x00000005 (STRTAB)                     0x85b4
0x00000006 (SYMTAB)                     0x84a4
0x0000000a (STRSZ)                      144 (bytes)
0x0000000b (SYMENT)                     16 (bytes)
0x00000015 (DEBUG)                      0x0
0x00000003 (PLTGOT)                     0x10948
0x00000002 (PLTRELSZ)                   24 (bytes)
0x00000014 (PLTREL)                     REL
0x00000017 (JMPREL)                     0x865c
0x00000011 (REL)                        0x8644
0x00000012 (RELSZ)                      24 (bytes)
0x00000013 (RELENT)                     8 (bytes)
0x00000000 (NULL)                       0x0

重定位节 “.rel.dyn” 位于偏移量 0x644 含有 3 个条目：
Offset     Info    Type            Sym.Value Sym. Name
00010960 00000515 R_ARM_GLOB_DAT    00008674   _init
00010964 00000a15 R_ARM_GLOB_DAT    000087b8   main
00010968 00000c15 R_ARM_GLOB_DAT    00008854   _fini

重定位节 “.rel.plt” 位于偏移量 0x65c 含有 3 个条目：
Offset     Info    Type            Sym.Value Sym. Name
00010954 00000116 R_ARM_JUMP_SLOT   00008698   printf
00010958 00000816 R_ARM_JUMP_SLOT   000086a4   __uClibc_main
0001095c 00001016 R_ARM_JUMP_SLOT   00000000   _Jv_RegisterClasses

There are no unwind sections in this file.

Symbol table '.dynsym' contains 17 entries:
   Num:    Value Size Type    Bind   Vis      Ndx Name
     0: 00000000     0 NOTYPE LOCAL DEFAULT UND
     1: 00008698    60 FUNC    GLOBAL DEFAULT UND printf
     2: 00010898     0 OBJECT GLOBAL DEFAULT ABS _DYNAMIC
     3: 00010984     0 NOTYPE GLOBAL DEFAULT ABS _bss_end__
     4: 00010980     0 NOTYPE GLOBAL DEFAULT ABS __bss_start__
     5: 00008674     4 FUNC    GLOBAL DEFAULT    7 _init
     6: 00010984     0 NOTYPE GLOBAL DEFAULT ABS __bss_end__
     7: 000086bc    80 FUNC    GLOBAL DEFAULT    9 _start
     8: 000086a4   516 FUNC    GLOBAL DEFAULT UND __uClibc_main
     9: 00010980     0 NOTYPE GLOBAL DEFAULT ABS __bss_start
    10: 000087b8    92 FUNC    GLOBAL DEFAULT    9 main
    11: 00010984     0 NOTYPE GLOBAL DEFAULT ABS __end__
    12: 00008854     4 FUNC    GLOBAL DEFAULT   10 _fini
    13: 00010980     0 NOTYPE GLOBAL DEFAULT ABS _edata
    14: 00010984     0 NOTYPE GLOBAL DEFAULT ABS _end
    15: 0001096c     0 NOTYPE GLOBAL DEFAULT   18 __data_start
    16: 00000000     0 NOTYPE WEAK   DEFAULT UND _Jv_RegisterClasses

Symbol table '.symtab' contains 90 entries:
   Num:    Value Size Type    Bind   Vis      Ndx Name
     0: 00000000     0 NOTYPE LOCAL DEFAULT UND
     1: 00008400     0 SECTION LOCAL DEFAULT    1
     2: 00008414     0 SECTION LOCAL DEFAULT    2
     3: 000084a4     0 SECTION LOCAL DEFAULT    3
     4: 000085b4     0 SECTION LOCAL DEFAULT    4
     5: 00008644     0 SECTION LOCAL DEFAULT    5
     6: 0000865c     0 SECTION LOCAL DEFAULT    6
     7: 00008674     0 SECTION LOCAL DEFAULT    7
     8: 00008684     0 SECTION LOCAL DEFAULT    8
     9: 000086bc     0 SECTION LOCAL DEFAULT    9
    10: 00008854     0 SECTION LOCAL DEFAULT   10
    11: 00008860     0 SECTION LOCAL DEFAULT   11
    12: 00008880     0 SECTION LOCAL DEFAULT   12
    13: 00010884     0 SECTION LOCAL DEFAULT   13
    14: 0001088c     0 SECTION LOCAL DEFAULT   14
    15: 00010894     0 SECTION LOCAL DEFAULT   15
    16: 00010898     0 SECTION LOCAL DEFAULT   16
    17: 00010948     0 SECTION LOCAL DEFAULT   17
    18: 0001096c     0 SECTION LOCAL DEFAULT   18
    19: 00010980     0 SECTION LOCAL DEFAULT   19
    20: 80000000     0 SECTION LOCAL DEFAULT   20
    21: 00000000     0 SECTION LOCAL DEFAULT   21
    22: 00000000     0 SECTION LOCAL DEFAULT   22
    23: 00000000     0 SECTION LOCAL DEFAULT   23
    24: 00000000     0 SECTION LOCAL DEFAULT   24
    25: 00008674     0 NOTYPE LOCAL DEFAULT    7 $a
    26: 00008854     0 NOTYPE LOCAL DEFAULT   10 $a
    27: 00010970     0 OBJECT LOCAL DEFAULT   18 force_to_data
    28: 00010884     0 OBJECT LOCAL DEFAULT   13 __CTOR_LIST__
    29: 00010884     0 NOTYPE LOCAL DEFAULT   13 $d
    30: 0001088c     0 OBJECT LOCAL DEFAULT   14 __DTOR_LIST__
    31: 0001088c     0 NOTYPE LOCAL DEFAULT   14 $d
    32: 00010894     0 OBJECT LOCAL DEFAULT   15 __JCR_LIST__
    33: 00010974     0 NOTYPE LOCAL DEFAULT   18 $d
    34: 00010978     0 OBJECT LOCAL DEFAULT   18 p.0
    35: 00010980     1 OBJECT LOCAL DEFAULT   19 completed.1
    36: 0000870c     0 FUNC    LOCAL DEFAULT    9 __do_global_dtors_aux
    37: 0000870c     0 NOTYPE LOCAL DEFAULT    9 $a
    38: 00008758     0 NOTYPE LOCAL DEFAULT    9 $d
    39: 00008760     0 FUNC    LOCAL DEFAULT    9 call___do_global_dtors_au
    40: 00008760     0 NOTYPE LOCAL DEFAULT    9 $a
    41: 00008858     0 NOTYPE LOCAL DEFAULT   10 $a
    42: 00008768     0 FUNC    LOCAL DEFAULT    9 frame_dummy
    43: 00008788     0 NOTYPE LOCAL DEFAULT    9 $d
    44: 00008790     0 FUNC    LOCAL DEFAULT    9 call_frame_dummy
    45: 00008790     0 NOTYPE LOCAL DEFAULT    9 $a
    46: 00008678     0 NOTYPE LOCAL DEFAULT    7 $a
    47: 0001097c     0 OBJECT LOCAL DEFAULT   18 force_to_data
    48: 00010888     0 OBJECT LOCAL DEFAULT   13 __CTOR_END__
    49: 00010888     0 NOTYPE LOCAL DEFAULT   13 $d
    50: 00010890     0 OBJECT LOCAL DEFAULT   14 __DTOR_END__
    51: 00010890     0 NOTYPE LOCAL DEFAULT   14 $d
    52: 00008880     0 OBJECT LOCAL DEFAULT   12 __FRAME_END__
    53: 00008880     0 NOTYPE LOCAL DEFAULT   12 $d
    54: 00010894     0 OBJECT LOCAL DEFAULT   15 __JCR_END__
    55: 00010894     0 NOTYPE LOCAL DEFAULT   15 $d
    56: 00008814     0 FUNC    LOCAL DEFAULT    9 __do_global_ctors_aux
    57: 00008814     0 NOTYPE LOCAL DEFAULT    9 $a
    58: 00008848     0 NOTYPE LOCAL DEFAULT    9 $d
    59: 0000884c     0 FUNC    LOCAL DEFAULT    9 call___do_global_ctors_au
    60: 0000884c     0 NOTYPE LOCAL DEFAULT    9 $a
    61: 0000867c     0 NOTYPE LOCAL DEFAULT    7 $a
    62: 00008680     0 NOTYPE LOCAL DEFAULT    7 $a
    63: 0000885c     0 NOTYPE LOCAL DEFAULT   10 $a
    64: 00008798     0 NOTYPE LOCAL DEFAULT    9 $a
    65: 000087b0     0 NOTYPE LOCAL DEFAULT    9 $d
    66: 000087b8     0 NOTYPE LOCAL DEFAULT    9 $a
    67: 00008810     0 NOTYPE LOCAL DEFAULT    9 $d
    68: 00008698    60 FUNC    GLOBAL DEFAULT UND printf
    69: 00010898     0 OBJECT GLOBAL DEFAULT ABS _DYNAMIC
    70: 00010984     0 NOTYPE GLOBAL DEFAULT ABS _bss_end__
    71: 00008798    32 FUNC    GLOBAL DEFAULT    9 get_bootarea_addr
    72: 00010980     0 NOTYPE GLOBAL DEFAULT ABS __bss_start__
    73: 00010974     0 OBJECT GLOBAL HIDDEN   18 __dso_handle
    74: 80500000     0 NOTYPE GLOBAL DEFAULT   20 __bootarea_end
    75: 00008674     4 FUNC    GLOBAL DEFAULT    7 _init
    76: 00010984     0 NOTYPE GLOBAL DEFAULT ABS __bss_end__
    77: 000086bc    80 FUNC    GLOBAL DEFAULT    9 _start
    78: 000086a4   516 FUNC    GLOBAL DEFAULT UND __uClibc_main
    79: 00010980     0 NOTYPE GLOBAL DEFAULT ABS __bss_start
    80: 000087b8    92 FUNC    GLOBAL DEFAULT    9 main
    81: 00010984     0 NOTYPE GLOBAL DEFAULT ABS __end__
    82: 0001096c     0 NOTYPE WEAK   DEFAULT   18 data_start
    83: 00008854     4 FUNC    GLOBAL DEFAULT   10 _fini
    84: 00010980     0 NOTYPE GLOBAL DEFAULT ABS _edata
    85: 00010948     0 OBJECT GLOBAL HIDDEN   17 _GLOBAL_OFFSET_TABLE_
    86: 00010984     0 NOTYPE GLOBAL DEFAULT ABS _end
    87: 0001096c     0 NOTYPE GLOBAL DEFAULT   18 __data_start
    88: 00000000     0 NOTYPE WEAK   DEFAULT UND _Jv_RegisterClasses
    89: 80000000     0 NOTYPE GLOBAL DEFAULT   20 __bootarea_start

Histogram for bucket list length (total of 17 buckets):
Length Number     % of total Coverage
      0 5          ( 29.4%)
      1 9          ( 52.9%)     56.2%
      2 2          ( 11.8%)     81.2%
      3 1          ( 5.9%)    100.0%

No version information found in this file.
----------------------------------------------------------------------------------------------------