This crates provides Rust bindings for the plthook library.
Please see the API documentation and the description in the plthook library for more details.
Examples
To print symbols in the current process:
use plthook::ObjectFile;
fn main() {
let object = ObjectFile::open_main_program().unwrap();
for symbol in object.symbols() {
println!("{:?} {:?}", symbol.func_address, symbol.name);
}
}
To replace a symbol:
use libc::{c_char, c_int};
use plthook::ObjectFile;
use std::mem::MaybeUninit;
static mut ATOI_FN: MaybeUninit<fn(*const c_char) -> c_int> = MaybeUninit::uninit();
fn neg_atoi(nptr: *const c_char) -> c_int {
let i = unsafe { (ATOI_FN.assume_init())(nptr) };
-i
}
fn main() {
let object = ObjectFile::open_main_program().unwrap();
unsafe {
let atoi_fn = ATOI_FN.as_mut_ptr() as *mut _;
*atoi_fn = object.replace("atoi", neg_atoi as *const _).unwrap();
};
let i = unsafe { libc::atoi(b"100\0".as_ptr().cast()) };
assert_eq!(i, -100);
}
