binutils 0.1.1

A Rust library that ease interacting with the binutils disassembly engine
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132

// Guillaume Valadon <guillaume@valadon.net>
// binutils - test_binary.rs

extern crate libc;
use libc::{c_ulong, uintptr_t};

extern crate binutils;
use binutils::bfd;
use binutils::instruction;
use binutils::opcodes::DisassembleInfo;
use binutils::utils;

extern "C" fn change_address(addr: c_ulong, _info: *const uintptr_t) {
    // Example of C callback that modifies an address used by an instruction

    // Format the address and copy it to the buffer
    utils::opcode_buffer_append(&format!("0x{:x}", addr));
}

fn test_ls(max_instructions: Option<u8>) {
    println!("From an ELF");

    let bfd = match bfd::Bfd::openr("/bin/ls", "elf64-x86-64") {
        Ok(b) => b,
        Err(e) => {
            println!("Error with openr() - {}", e);
            return;
        }
    };

    match bfd.check_format(bfd::BfdFormat::bfd_object) {
        Ok(_) => (),
        Err(e) => {
            println!("Error with check_format() - {}", e);
            return;
        }
    };

    // Retrieve the .text code section
    let section = match bfd.get_section_by_name(".text") {
        Ok(s) => s,
        Err(e) => {
            println!("Error with get_section_by_name() - {}", e);
            return;
        }
    };

    // Construct disassembler_ftype class
    let disassemble = match bfd.disassembler() {
        Ok(d) => d,
        Err(e) => {
            println!("Error with disassembler() - {}", e);
            return;
        }
    };

    // Create a disassemble_info structure
    let info = match DisassembleInfo::new() {
        Ok(i) => i,
        Err(e) => {
            println!("{}", e);
            return;
        }
    };

    // Configure the disassemble_info structure
    match info.configure(section, bfd) {
        Ok(_) => (),
        Err(e) => {
            println!("Error configure() - {}", e);
            return;
        }
    };
    match info.set_print_address_func(change_address) {
        Ok(_) => (),
        Err(e) => {
            println!("Error set_print_address_func() - {}", e);
            return;
        }
    };
    match info.init() {
        Ok(_) => (),
        Err(e) => {
            println!("Error init() - {}", e);
            return;
        }
    };

    // Disassemble the binary
    let mut pc = match bfd.get_start_address() {
        Ok(a) => a,
        Err(e) => {
            println!("Error with get_start_address() - {}", e);
            return;
        }
    };
    let section_size = match section.get_size() {
        Ok(a) => a,
        Err(e) => {
            println!("Error with get_size() - {}", e);
            return;
        }
    };
    let mut counter = 0;
    loop {
        let length = disassemble(pc, &info);
        let instruction = match instruction::get_instruction(pc, length) {
            Ok(i) => i,
            Err(e) => {
                println!("{}", e);
                return;
            }
        };

        println!("{}", instruction);

        pc += length;
        counter += 1;

        if !(length > 0 && pc <= section_size) {
            break;
        }

        if !max_instructions.is_none() && max_instructions.unwrap() <= counter {
            break;
        }
    }
}

fn main() {
    test_ls(Some(12));
}