1 unstable release
new 0.1.0 | Mar 30, 2025 |
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#629 in Encoding
Used in 2 crates
170KB
4.5K
SLoC
elb
ELF reader/patcher library that features
- reading and writing ELF files,
- patching
RPATH
,RUNPATH
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_library_search_path(DynamicTag::Runpath, c"/chroot/lib64:/chroot/usr/lib64")?;
patcher.finish()?;
Ok(())
}
Dependencies
~0.4–0.9MB
~20K SLoC