Struct elfio::DynamicSectionAccessor

pub struct DynamicSectionAccessor<'a> { /* fields omitted */ }

A section data accessor intended to dynamic tables

For example:

use std::fs::File;
use std::io;
use std::io::{BufReader, Error};

use elfio::Elfio;

fn main() -> io::Result<()> {
    let elf_file = File::open("tests/files/hello_32")?;
    let mut reader = BufReader::new(elf_file);

    let mut elf = Elfio::new();

    elf.load(&mut reader)?;

    let section = match elf.get_section_by_name(&".dynamic") {
        Some(s) => s,
        None => return Err(Error::new(io::ErrorKind::Other, "section not found")),
    };

    let dyns = elfio::DynamicSectionAccessor::new(&elf, section);

    assert_eq!(dyns.get_entries_num(), 20);

    // Dynamic section at offset 0x4a0 contains 20 entries:
    //   Tag        Type                         Name/Value
    //  0x00000001 (NEEDED)                     Shared library: [libc.so.6]
    //  0x0000000c (INIT)                       0x804824c
    //  0x0000000d (FINI)                       0x8048458
    //  0x6ffffef5 (GNU_HASH)                   0x8048148
    let dynamic = dyns.get_entry(3).unwrap();
    assert_eq!(dynamic.tag, 0x6ffffef5);
    assert_eq!(dynamic.value, 0x8048148);

    Ok(())
}

Implementations

impl<'a> DynamicSectionAccessor<'a>

pub fn new(
    elfio: &'a Elfio,
    section: &'a dyn ElfSectionTrait
) -> DynamicSectionAccessor<'a>

Creates a new instance of the relocation table accessor

pub fn get_entries_num(&self) -> ElfXword

Returns number of symbols

pub fn get_entry(&self, index: ElfXword) -> Option<Dynamic>

Get a relocation entry by its index