ELF 位置无关代码

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: 0x2eb
Start of program headers: 52 (bytes into file)
Start of section headers: 2932 (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: 5
Size of section headers: 40 (bytes)
Number of section headers: 24
Section header string table index: 23

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 000000d4 0000d4 000011 00 A 0 0 1
[ 2] .hash HASH 000000e8 0000e8 000054 04 A 3 0 4
[ 3] .dynsym DYNSYM 0000013c 00013c 000100 10 A 4 3 4
[ 4] .dynstr STRTAB 0000023c 00023c 000065 00 A 0 0 1
[ 5] .rel.dyn REL 000002a4 0002a4 000010 08 A 3 0 4
[ 6] .rel.plt REL 000002b4 0002b4 000008 08 AI 3 10 4
[ 7] .plt PROGBITS 000002bc 0002bc 000020 04 AX 0 0 4
[ 8] .text PROGBITS 000002dc 0002dc 000050 00 AX 0 0 4
[ 9] .dynamic DYNAMIC 0000032c 00032c 0000a8 08 WA 4 0 4
[10] .got PROGBITS 000003d4 0003d4 000018 04 WA 0 0 4
[11] .data PROGBITS 000003ec 0003ec 000004 00 WA 0 0 4
[12] .bss NOBITS 000003f0 0003f0 000050 00 WA 0 0 4
[13] .comment PROGBITS 00000000 0003f0 00007c 01 MS 0 0 1
[14] .debug_aranges PROGBITS 00000000 00046c 000020 00 0 0 1
[15] .debug_info PROGBITS 00000000 00048c 00009b 00 0 0 1
[16] .debug_abbrev PROGBITS 00000000 000527 00007f 00 0 0 1
[17] .debug_line PROGBITS 00000000 0005a6 00003c 00 0 0 1
[18] .debug_frame PROGBITS 00000000 0005e4 000050 00 0 0 4
[19] .debug_str PROGBITS 00000000 000634 0000b1 01 MS 0 0 1
[20] .ARM.attributes ARM_ATTRIBUTES 00000000 0006e5 000033 00 0 0 1
[21] .symtab SYMTAB 00000000 000718 000300 10 22 33 4
[22] .strtab STRTAB 00000000 000a18 00008b 00 0 0 1
[23] .shstrtab STRTAB 00000000 000aa3 0000d0 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
PHDR 0x000034 0x00000034 0x00000034 0x000a0 0x000a0 R E 0x4
INTERP 0x0000d4 0x000000d4 0x000000d4 0x00011 0x00011 R 0x1
[Requesting program interpreter: /usr/lib/ld.so.1]
LOAD 0x000000 0x00000000 0x00000000 0x0032c 0x0032c R E 0x4
LOAD 0x00032c 0x0000032c 0x0000032c 0x000c4 0x00114 RW 0x4
DYNAMIC 0x00032c 0x0000032c 0x0000032c 0x000a8 0x000a8 RW 0x4

Section to Segment mapping:
Segment Sections…
00
01 .interp
02 .interp .hash .dynsym .dynstr .rel.dyn .rel.plt .plt .text
03 .dynamic .got .data .bss
04 .dynamic

Dynamic section at offset 0x32c contains 17 entries:
Tag Type Name/Value
0x00000001 (NEEDED) Shared library: [libtest.so]
0x00000004 (HASH) 0xe8
0x00000005 (STRTAB) 0x23c
0x00000006 (SYMTAB) 0x13c
0x0000000a (STRSZ) 101 (bytes)
0x0000000b (SYMENT) 16 (bytes)
0x00000015 (DEBUG) 0x0
0x00000003 (PLTGOT) 0x3d4
0x00000002 (PLTRELSZ) 8 (bytes)
0x00000014 (PLTREL) REL
0x00000017 (JMPREL) 0x2b4
0x00000011 (REL) 0x2a4
0x00000012 (RELSZ) 16 (bytes)
0x00000013 (RELENT) 8 (bytes)
0x6ffffffb (FLAGS_1) Flags: PIE
0x6ffffffa (RELCOUNT) 2
0x00000000 (NULL) 0x0

Relocation section ‘.rel.dyn’ at offset 0x2a4 contains 2 entries:
Offset Info Type Sym.Value Sym. Name
000003e4 00000017 R_ARM_RELATIVE
000003e8 00000017 R_ARM_RELATIVE

Relocation section ‘.rel.plt’ at offset 0x2b4 contains 1 entries:
Offset Info Type Sym.Value Sym. Name
000003e0 00000716 R_ARM_JUMP_SLOT 00000000 mul

There are no unwind sections in this file.

Symbol table ‘.dynsym’ contains 16 entries:
Num: Value Size Type Bind Vis Ndx Name
0: 00000000 0 NOTYPE LOCAL DEFAULT UND
1: 000002dc 0 SECTION LOCAL DEFAULT 8
2: 000003ec 0 SECTION LOCAL DEFAULT 11
3: 000003f0 40 OBJECT GLOBAL DEFAULT 12 b
4: 00000440 0 NOTYPE GLOBAL DEFAULT 12 bss_end_
5: 000003f0 0 NOTYPE GLOBAL DEFAULT 12 bss_start
6: 00000440 0 NOTYPE GLOBAL DEFAULT 12 bss_end
7: 00000000 0 FUNC GLOBAL DEFAULT UND mul
8: 000003f0 0 NOTYPE GLOBAL DEFAULT 12 __bss_start
9: 000002eb 66 FUNC GLOBAL DEFAULT 8 main
10: 00000440 0 NOTYPE GLOBAL DEFAULT 12 end
11: 000003f0 0 NOTYPE GLOBAL DEFAULT 11 _edata
12: 00000440 0 NOTYPE GLOBAL DEFAULT 12 _end
13: 00000418 40 OBJECT GLOBAL DEFAULT 12 a
14: 00080000 0 NOTYPE GLOBAL DEFAULT 20 _stack
15: 000003ec 0 NOTYPE GLOBAL DEFAULT 11 __data_start

Symbol table ‘.symtab’ contains 48 entries:
Num: Value Size Type Bind Vis Ndx Name
0: 00000000 0 NOTYPE LOCAL DEFAULT UND
1: 000000d4 0 SECTION LOCAL DEFAULT 1
2: 000000e8 0 SECTION LOCAL DEFAULT 2
3: 0000013c 0 SECTION LOCAL DEFAULT 3
4: 0000023c 0 SECTION LOCAL DEFAULT 4
5: 000002a4 0 SECTION LOCAL DEFAULT 5
6: 000002b4 0 SECTION LOCAL DEFAULT 6
7: 000002bc 0 SECTION LOCAL DEFAULT 7
8: 000002dc 0 SECTION LOCAL DEFAULT 8
9: 0000032c 0 SECTION LOCAL DEFAULT 9
10: 000003d4 0 SECTION LOCAL DEFAULT 10
11: 000003ec 0 SECTION LOCAL DEFAULT 11
12: 000003f0 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 SECTION LOCAL DEFAULT 20
21: 00000000 0 FILE LOCAL DEFAULT ABS test1.c
22: 000002dc 0 NOTYPE LOCAL DEFAULT 8 $t
23: 000003ec 0 NOTYPE LOCAL DEFAULT 11 $d
24: 0000031c 0 NOTYPE LOCAL DEFAULT 8 $d
25: 00000010 0 NOTYPE LOCAL DEFAULT 18 $d
26: 00000000 0 FILE LOCAL DEFAULT ABS
27: 0000032c 0 OBJECT LOCAL DEFAULT ABS DYNAMIC
28: 000003d4 0 OBJECT LOCAL DEFAULT ABS GLOBAL_OFFSET_TABLE
29: 000002bc 0 NOTYPE LOCAL DEFAULT 7 $t
30: 000002c8 0 NOTYPE LOCAL DEFAULT 7 $d
31: 000002cc 0 NOTYPE LOCAL DEFAULT 7 $t
32: 000002cc 0 NOTYPE LOCAL DEFAULT 7 $t
33: 000003f0 40 OBJECT GLOBAL DEFAULT 12 b
34: 00000440 0 NOTYPE GLOBAL DEFAULT 12 bss_end
35: 000003f0 0 NOTYPE GLOBAL DEFAULT 12 bss_start
36: 000002dd 14 FUNC GLOBAL DEFAULT 8 bb
37: 000003ec 4 OBJECT GLOBAL DEFAULT 11 aa
38: 00000440 0 NOTYPE GLOBAL DEFAULT 12 bss_end
39: 00000000 0 FUNC GLOBAL DEFAULT UND mul
40: 000003f0 0 NOTYPE GLOBAL DEFAULT 12 __bss_start
41: 000002eb 66 FUNC GLOBAL DEFAULT 8 main
42: 00000440 0 NOTYPE GLOBAL DEFAULT 12 end
43: 000003f0 0 NOTYPE GLOBAL DEFAULT 11 _edata
44: 00000440 0 NOTYPE GLOBAL DEFAULT 12 _end
45: 00000418 40 OBJECT GLOBAL DEFAULT 12 a
46: 00080000 0 NOTYPE GLOBAL DEFAULT 20 _stack
47: 000003ec 0 NOTYPE GLOBAL DEFAULT 11 __data_start

Histogram for bucket list length (total of 3 buckets):
Length Number % of total Coverage
0 3 (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