Function register_write_printer

hail-fuzz/src/debugging/check.rs:579–593

(vm: &mut Vm, addr: u64, data_reg: &str, len_reg: &str)

}

fn register_write_printer(vm: &mut Vm, addr: u64, data_reg: &str, len_reg: &str) {
    tracing::debug!("registering `write(data={data_reg}, len={len_reg})` hook at {addr:#x}");
    let data = vm.cpu.arch.sleigh.get_varnode(data_reg).unwrap();
    let len = vm.cpu.arch.sleigh.get_varnode(len_reg).unwrap();

    let mut buf = vec![];
    vm.hook_address(addr, move |cpu: &mut icicle_vm::cpu::Cpu, _| {
        let ptr = cpu.read_var::<u32>(data);
        let len = cpu.read_var::<u32>(len);
        buf.resize((len as usize).min(64), 0);
        let _ = cpu.mem.read_bytes(ptr as u64, &mut buf, perm::NONE);
        print!("{}", buf.as_bstr());
        let _ = std::io::stdout().flush();
    });
}