我必须编写一个打印 ELF 文件的 C 程序。我无法确定节标题字符串表的位置。
假设我有一个文件,它给了我以下输出:
读取 -h
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: REL (Relocatable file)
Machine: Intel 80386
Version: 0x1
Entry point address: 0x0
Start of program headers: 0 (bytes into file)
Start of section headers: 17636 (bytes into file)
Flags: 0x0
Size of this header: 52 (bytes)
Size of program headers: 0 (bytes)
Number of program headers: 0
Size of section headers: 40 (bytes)
Number of section headers: 23
Section header string table index: 20
与:
阅读器-S:
There are 23 section headers, starting at offset 0x44e4:
Section Headers:
[Nr] Name Type Addr Off Size ES Flg Lk Inf Al
[ 0] NULL 00000000 000000 000000 00 0 0 0
[ 1] .text PROGBITS 00000000 000034 000028 00 AX 0 0 4
[ 2] .rel.text REL 00000000 0049d0 000018 08 21 1 4
[ 3] .data PROGBITS 00000000 00005c 000000 00 WA 0 0 4
[ 4] .bss NOBITS 00000000 00005c 000000 00 WA 0 0 4
[ 5] .rodata PROGBITS 00000000 00005c 00000a 00 A 0 0 1
[ 6] .debug_info PROGBITS 00000000 000066 00008f 00 0 0 1
[ 7] .rel.debug_info REL 00000000 0049e8 0000b0 08 21 6 4
[ 8] .debug_abbrev PROGBITS 00000000 0000f5 000041 00 0 0 1
[ 9] .debug_loc PROGBITS 00000000 000136 000038 00 0 0 1
[10] .debug_aranges PROGBITS 00000000 00016e 000020 00 0 0 1
[11] .rel.debug_arange REL 00000000 004a98 000010 08 21 10 4
[12] .debug_line PROGBITS 00000000 00018e 0001b3 00 0 0 1
[13] .rel.debug_line REL 00000000 004aa8 000008 08 21 12 4
[14] .debug_macinfo PROGBITS 00000000 000341 003fb9 00 0 0 1
[15] .debug_str PROGBITS 00000000 0042fa 0000bf 01 MS 0 0 1
[16] .comment PROGBITS 00000000 0043b9 00002b 01 MS 0 0 1
[17] .note.GNU-stack PROGBITS 00000000 0043e4 000000 00 0 0 1
[18] .eh_frame PROGBITS 00000000 0043e4 000038 00 A 0 0 4
[19] .rel.eh_frame REL 00000000 004ab0 000008 08 21 18 4
[20] .shstrtab STRTAB 00000000 00441c 0000c5 00 0 0 1
[21] .symtab SYMTAB 00000000 00487c 000130 10 22 16 4
[22] .strtab STRTAB 00000000 0049ac 000021 00 0 0 1
Key to Flags:
W (write), A (alloc), X (execute), M (merge), S (strings)
I (info), L (link order), G (group), T (TLS), E (exclude), x (unknown)
O (extra OS processing required) o (OS specific), p (processor specific)
我将如何计算节标题字符串表的位置?