elb
ELF reader/patcher library that features
- reading and writing ELF files,
- patching
RPATH, RUNPATH, SONAME and interpreter via high-level API,
- verifying correctness of ELF files,
- custom patching via low-level API.
To resolve dependencies without loading and executing files,
you can use elb-dl that is based on this crate.
There is also an accompanying command-line utility.
Usage
use elb::{DynamicTag, Elf, ElfPatcher, Error};
use std::fs::{File, OpenOptions};
fn read_elf() -> Result<(), Error> {
let mut file = File::open("/bin/ls")?;
let page_size = 4096;
let elf = Elf::read(&mut file, page_size)?;
eprintln!("{:#?}", elf.header);
Ok(())
}
fn patch_elf() -> Result<(), Error> {
let mut file = OpenOptions::new().read(true).write(true).open("/chroot/bin/ls")?;
let page_size = 4096;
let elf = Elf::read(&mut file, page_size)?;
let mut patcher = ElfPatcher::new(elf, file);
patcher.set_interpreter(c"/chroot/lib64/ld-linux-x86-64.so.2")?;
patcher.set_dynamic_tag(DynamicTag::Runpath, c"/chroot/lib64:/chroot/usr/lib64")?;
patcher.finish()?;
Ok(())
}
References
Other ELF readers/patchers:
Dynamic linkers:
Man pages:
Linters:
