Add DLL proxying to readme

README.md

@@ -10,6 +10,9 @@ the script.
 
 All desktop platforms are supported (Windows, Linux, macOS).
 
+**NOTE**: To cross-compile for Windows you can use [cargo-xwin](https://github.com/rust-cross/cargo-xwin)
+with target `x86_64-pc-windows-msvc`.
+
 ## Usage
 
 You're gonna have to compile the tool yourself as the frida script gets embedded
@@ -49,3 +52,22 @@ void inject_self(); // Run the frida script in the process that called the funct
 ```
 
 By default, on load the library will call `inject_self()`.
+
+### DLL Proxying
+
+There's also the option of generating a DLL ready for DLL Proxying use.
+That means that you give the DLL `myawesome.dll` to cargo
+(using the `DLL_PROXY` environment variable) and it will generate a DLL
+`myawesome.dll` that can replace the original DLL. It will tell the linker
+that any functions found during compilation (e.g. functions `foo` and `bar`
+exported by the original `myawesome.dll`) should be redirected to `myawesome-orig.dll`
+
+That allows you to make your script completely permanent without having to
+run any extra commands.
+
+**NOTE**: This only works on Windows (for now?).
+
+```bash
+git clone https://github.com/dzervas/frida-deepfreeze-rs
+DLL_PROXY='../myawesome.dll' FRIDA_CODE='console.log("Hello world from frida-deepfreeze-rs!")' cargo xwin build --lib --target x86_64-pc-windows-msvc
+```

src/injector.rs

@@ -44,9 +44,6 @@ pub fn attach(pid: u32) {
 #[no_mangle]
 pub fn attach_self() {
 	println!("[*] Attaching to self");
-	// #[cfg(windows)]
-	// attach(std::process::id());
-	// #[cfg(unix)]
 	attach(0);
 }