动态模块没有data段

发布于 2022-03-21 15:25:50 浏览：525 订阅该版

1 个回答

ImNtJempty 2022-03-21

这家伙很懒，什么也没写！

```
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:                              DYN (Shared object file)
  Machine:                           ARM
  Version:                           0x1
  Entry point address:               0x60d
  Start of program headers:          52 (bytes into file)
  Start of section headers:          8580 (bytes into file)
  Flags:                             0x5000200, Version5 EABI, soft-float ABI
  Size of this header:               52 (bytes)
  Size of program headers:           32 (bytes)
  Number of program headers:         3
  Size of section headers:           40 (bytes)
  Number of section headers:         23
  Section header string table index: 20

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            00000094 000094 0000bc 04   A  2   0  4
  [ 2] .dynsym           DYNSYM          00000150 000150 0001c0 10   A  3   3  4
  [ 3] .dynstr           STRTAB          00000310 000310 000126 00   A  0   0  1
  [ 4] .rel.dyn          REL             00000438 000438 000078 08   A  2   0  4
  [ 5] .text             PROGBITS        000004b0 0004b0 0002c0 00  AX  0   0  4
  [ 6] .rodata           PROGBITS        00000770 000770 000068 00   A  0   0  4
  [ 7] .dynamic          DYNAMIC         000007d8 0007d8 000070 08  WA  3   0  4
  [ 8] .got              PROGBITS        00000848 000848 000048 04  WA  0   0  4
  [ 9] .bss              NOBITS          00000890 000890 00002c 00  WA  0   0  4
  [10] .comment          PROGBITS        00000000 000890 00006e 01  MS  0   0  1
  [11] .debug_aranges    PROGBITS        00000000 0008fe 000030 00      0   0  1
  [12] .debug_info       PROGBITS        00000000 00092e 0007db 00      0   0  1
  [13] .debug_abbrev     PROGBITS        00000000 001109 00018b 00      0   0  1
  [14] .debug_line       PROGBITS        00000000 001294 0000ba 00      0   0  1
  [15] .debug_frame      PROGBITS        00000000 001350 000084 00      0   0  4
  [16] .debug_str        PROGBITS        00000000 0013d4 0005dd 01  MS  0   0  1
  [17] .debug_loc        PROGBITS        00000000 0019b1 0000da 00      0   0  1
  [18] .debug_ranges     PROGBITS        00000000 001a8b 000020 00      0   0  1
  [19] .ARM.attributes   ARM_ATTRIBUTES  00000000 001aab 000033 00      0   0  1
  [20] .shstrtab         STRTAB          00000000 0020a9 0000da 00      0   0  1
  [21] .symtab           SYMTAB          00000000 001ae0 000430 10     22  42  4
  [22] .strtab           STRTAB          00000000 001f10 000199 00      0   0  1
Key to Flags:
  W (write), A (alloc), X (execute), M (merge), S (strings), I (info),
  L (link order), O (extra OS processing required), G (group), T (TLS),
  C (compressed), x (unknown), o (OS specific), E (exclude),
  y (purecode), p (processor specific)

There are no section groups in this file.

Program Headers:
  Type           Offset   VirtAddr   PhysAddr   FileSiz MemSiz  Flg Align
  LOAD           0x000000 0x00000000 0x00000000 0x007d8 0x007d8 R E 0x4
  LOAD           0x0007d8 0x000007d8 0x000007d8 0x000b8 0x000e4 RW  0x4
  DYNAMIC        0x0007d8 0x000007d8 0x000007d8 0x00070 0x00070 RW  0x4

Section to Segment mapping:
  Segment Sections...
   00     .hash .dynsym .dynstr .rel.dyn .text .rodata 
   01     .dynamic .got .bss 
   02     .dynamic

Dynamic section at offset 0x7d8 contains 9 entries:
  Tag        Type                         Name/Value
 0x00000004 (HASH)                       0x94
 0x00000005 (STRTAB)                     0x310
 0x00000006 (SYMTAB)                     0x150
 0x0000000a (STRSZ)                      294 (bytes)
 0x0000000b (SYMENT)                     16 (bytes)
 0x00000011 (REL)                        0x438
 0x00000012 (RELSZ)                      120 (bytes)
 0x00000013 (RELENT)                     8 (bytes)
 0x00000000 (NULL)                       0x0

Relocation section '.rel.dyn' at offset 0x438 contains 15 entries:
 Offset     Info    Type            Sym.Value  Sym. Name
00000854  00000315 R_ARM_GLOB_DAT    00000000   rt_strncpy
00000858  00000415 R_ARM_GLOB_DAT    00000000   rt_device_set_rx_indic
0000085c  00000515 R_ARM_GLOB_DAT    00000000   rt_device_open
00000860  00000715 R_ARM_GLOB_DAT    00000000   rt_kprintf
00000864  00000815 R_ARM_GLOB_DAT    00000000   rt_device_read
00000868  00000915 R_ARM_GLOB_DAT    00000000   rt_device_find
0000086c  00000b15 R_ARM_GLOB_DAT    00000000   rt_thread_create
00000870  00000c15 R_ARM_GLOB_DAT    00000000   rt_malloc
00000874  00000d15 R_ARM_GLOB_DAT    00000000   rt_sem_release
00000878  00000f15 R_ARM_GLOB_DAT    000008b8   serial
0000087c  00001315 R_ARM_GLOB_DAT    00000000   rt_thread_startup
00000880  00001415 R_ARM_GLOB_DAT    00000000   rt_sem_init
00000884  00001515 R_ARM_GLOB_DAT    00000000   rt_memset
00000888  00001815 R_ARM_GLOB_DAT    00000000   rt_sem_take
0000088c  00001b15 R_ARM_GLOB_DAT    00000000   rt_device_write

There are no unwind sections in this file.

Symbol table '.dynsym' contains 28 entries:
   Num:    Value  Size Type    Bind   Vis      Ndx Name
     0: 00000000     0 NOTYPE  LOCAL  DEFAULT  UND 
     1: 000004b0     0 SECTION LOCAL  DEFAULT    5 
     2: 00000890     0 SECTION LOCAL  DEFAULT    9 
     3: 00000000     0 NOTYPE  GLOBAL DEFAULT  UND rt_strncpy
     4: 00000000     0 NOTYPE  GLOBAL DEFAULT  UND rt_device_set_rx_indicate
     5: 00000000     0 NOTYPE  GLOBAL DEFAULT  UND rt_device_open
     6: 000008bc     0 NOTYPE  GLOBAL DEFAULT    9 _bss_end__
     7: 00000000     0 NOTYPE  GLOBAL DEFAULT  UND rt_kprintf
     8: 00000000     0 NOTYPE  GLOBAL DEFAULT  UND rt_device_read
     9: 00000000     0 NOTYPE  GLOBAL DEFAULT  UND rt_device_find
    10: 00000890     0 NOTYPE  GLOBAL DEFAULT    9 __bss_start__
    11: 00000000     0 NOTYPE  GLOBAL DEFAULT  UND rt_thread_create
    12: 00000000     0 NOTYPE  GLOBAL DEFAULT  UND rt_malloc
    13: 00000000     0 NOTYPE  GLOBAL DEFAULT  UND rt_sem_release
    14: 000008bc     0 NOTYPE  GLOBAL DEFAULT    9 __bss_end__
    15: 000008b8     4 OBJECT  GLOBAL DEFAULT    9 serial
    16: 00000890     0 NOTYPE  GLOBAL DEFAULT    9 __bss_start
    17: 0000060d   356 FUNC    GLOBAL DEFAULT    5 main
    18: 000008bc     0 NOTYPE  GLOBAL DEFAULT    9 __end__
    19: 00000000     0 NOTYPE  GLOBAL DEFAULT  UND rt_thread_startup
    20: 00000000     0 NOTYPE  GLOBAL DEFAULT  UND rt_sem_init
    21: 00000000     0 NOTYPE  GLOBAL DEFAULT  UND rt_memset
    22: 00000890     0 NOTYPE  GLOBAL DEFAULT    8 _edata
    23: 000008bc     0 NOTYPE  GLOBAL DEFAULT    9 _end
    24: 00000000     0 NOTYPE  GLOBAL DEFAULT  UND rt_sem_take
    25: 00080000     0 NOTYPE  GLOBAL DEFAULT   19 _stack
    26: 00000890     0 NOTYPE  GLOBAL DEFAULT    8 __data_start
    27: 00000000     0 NOTYPE  GLOBAL DEFAULT  UND rt_device_write

Symbol table '.symtab' contains 67 entries:
   Num:    Value  Size Type    Bind   Vis      Ndx Name
     0: 00000000     0 NOTYPE  LOCAL  DEFAULT  UND 
     1: 00000094     0 SECTION LOCAL  DEFAULT    1 
     2: 00000150     0 SECTION LOCAL  DEFAULT    2 
     3: 00000310     0 SECTION LOCAL  DEFAULT    3 
     4: 00000438     0 SECTION LOCAL  DEFAULT    4 
     5: 000004b0     0 SECTION LOCAL  DEFAULT    5 
     6: 00000770     0 SECTION LOCAL  DEFAULT    6 
     7: 000007d8     0 SECTION LOCAL  DEFAULT    7 
     8: 00000848     0 SECTION LOCAL  DEFAULT    8 
     9: 00000890     0 SECTION LOCAL  DEFAULT    9 
    10: 00000000     0 SECTION LOCAL  DEFAULT   10 
    11: 00000000     0 SECTION LOCAL  DEFAULT   11 
    12: 00000000     0 SECTION LOCAL  DEFAULT   12 
    13: 00000000     0 SECTION LOCAL  DEFAULT   13 
    14: 00000000     0 SECTION LOCAL  DEFAULT   14 
    15: 00000000     0 SECTION LOCAL  DEFAULT   15 
    16: 00000000     0 SECTION LOCAL  DEFAULT   16 
    17: 00000000     0 SECTION LOCAL  DEFAULT   17 
    18: 00000000     0 SECTION LOCAL  DEFAULT   18 
    19: 00000000     0 SECTION LOCAL  DEFAULT   19 
    20: 00000000     0 FILE    LOCAL  DEFAULT  ABS main.c
    21: 00000890     0 NOTYPE  LOCAL  DEFAULT    9 $d
    22: 00000890    32 OBJECT  LOCAL  DEFAULT    9 rx_sem
    23: 000004b0     0 NOTYPE  LOCAL  DEFAULT    5 $t
    24: 000004b1    48 FUNC    LOCAL  DEFAULT    5 uart_input
    25: 000004d4     0 NOTYPE  LOCAL  DEFAULT    5 $d
    26: 00000770     0 NOTYPE  LOCAL  DEFAULT    6 $d
    27: 000004e0     0 NOTYPE  LOCAL  DEFAULT    5 $t
    28: 000004e1   300 FUNC    LOCAL  DEFAULT    5 serial_thread_entry
    29: 000005b4     0 NOTYPE  LOCAL  DEFAULT    5 $d
    30: 000007c4    20 OBJECT  LOCAL  DEFAULT    6 __func__.5852
    31: 000008b0     4 OBJECT  LOCAL  DEFAULT    9 want.5850
    32: 000008b4     4 OBJECT  LOCAL  DEFAULT    9 ret.5849
    33: 0000060c     0 NOTYPE  LOCAL  DEFAULT    5 $t
    34: 00000724     0 NOTYPE  LOCAL  DEFAULT    5 $d
    35: 000007c4     0 NOTYPE  LOCAL  DEFAULT    6 $d
    36: 000008b0     0 NOTYPE  LOCAL  DEFAULT    9 $d
    37: 000008b4     0 NOTYPE  LOCAL  DEFAULT    9 $d
    38: 00000010     0 NOTYPE  LOCAL  DEFAULT   15 $d
    39: 00000000     0 FILE    LOCAL  DEFAULT  ABS 
    40: 000007d8     0 OBJECT  LOCAL  DEFAULT  ABS _DYNAMIC
    41: 00000848     0 OBJECT  LOCAL  DEFAULT  ABS _GLOBAL_OFFSET_TABLE_
    42: 00000000     0 NOTYPE  GLOBAL DEFAULT  UND rt_strncpy
    43: 00000000     0 NOTYPE  GLOBAL DEFAULT  UND rt_device_set_rx_indicate
    44: 00000000     0 NOTYPE  GLOBAL DEFAULT  UND rt_device_open
    45: 000008bc     0 NOTYPE  GLOBAL DEFAULT    9 _bss_end__
    46: 00000000     0 NOTYPE  GLOBAL DEFAULT  UND rt_kprintf
    47: 00000000     0 NOTYPE  GLOBAL DEFAULT  UND rt_device_read
    48: 00000000     0 NOTYPE  GLOBAL DEFAULT  UND rt_device_find
    49: 00000890     0 NOTYPE  GLOBAL DEFAULT    9 __bss_start__
    50: 00000000     0 NOTYPE  GLOBAL DEFAULT  UND rt_thread_create
    51: 00000000     0 NOTYPE  GLOBAL DEFAULT  UND rt_malloc
    52: 00000000     0 NOTYPE  GLOBAL DEFAULT  UND rt_sem_release
    53: 000008bc     0 NOTYPE  GLOBAL DEFAULT    9 __bss_end__
    54: 000008b8     4 OBJECT  GLOBAL DEFAULT    9 serial
    55: 00000890     0 NOTYPE  GLOBAL DEFAULT    9 __bss_start
    56: 0000060d   356 FUNC    GLOBAL DEFAULT    5 main
    57: 000008bc     0 NOTYPE  GLOBAL DEFAULT    9 __end__
    58: 00000000     0 NOTYPE  GLOBAL DEFAULT  UND rt_thread_startup
    59: 00000000     0 NOTYPE  GLOBAL DEFAULT  UND rt_sem_init
    60: 00000000     0 NOTYPE  GLOBAL DEFAULT  UND rt_memset
    61: 00000890     0 NOTYPE  GLOBAL DEFAULT    8 _edata
    62: 000008bc     0 NOTYPE  GLOBAL DEFAULT    9 _end
    63: 00000000     0 NOTYPE  GLOBAL DEFAULT  UND rt_sem_take
    64: 00080000     0 NOTYPE  GLOBAL DEFAULT   19 _stack
    65: 00000890     0 NOTYPE  GLOBAL DEFAULT    8 __data_start
    66: 00000000     0 NOTYPE  GLOBAL DEFAULT  UND rt_device_write

Histogram for bucket list length (total of 17 buckets):
 Length  Number     % of total  Coverage
      0  4          ( 23.5%)
      1  8          ( 47.1%)     32.0%
      2  1          (  5.9%)     40.0%
      3  2          ( 11.8%)     64.0%
      4  1          (  5.9%)     80.0%
      5  1          (  5.9%)    100.0%

No version information found in this file.
Attribute Section: aeabi
File Attributes
  Tag_CPU_name: "Cortex-M3"
  Tag_CPU_arch: v7
  Tag_CPU_arch_profile: Microcontroller
  Tag_THUMB_ISA_use: Thumb-2
  Tag_ABI_PCS_wchar_t: 4
  Tag_ABI_FP_denormal: Needed
  Tag_ABI_FP_exceptions: Needed
  Tag_ABI_FP_number_model: IEEE 754
  Tag_ABI_align_needed: 8-byte
  Tag_ABI_align_preserved: 8-byte, except leaf SP
  Tag_ABI_enum_size: small
  Tag_ABI_optimization_goals: Aggressive Debug
  Tag_CPU_unaligned_access: v6
```