1 files changed, 102 insertions, 0 deletions
diff --git a/rust/src/function_recognizer.rs b/rust/src/function_recognizer.rs
new file mode 100644
index 00000000..64e33806
--- /dev/null
+++ b/rust/src/function_recognizer.rs
@@ -0,0 +1,102 @@
+use crate::low_level_il::function::LowLevelILFunction;
+use crate::low_level_il::RegularLowLevelILFunction;
+use crate::medium_level_il::MediumLevelILFunction;
+use crate::{architecture::CoreArchitecture, binary_view::BinaryView, function::Function};
+use binaryninjacore_sys::*;
+use std::os::raw::c_void;
+
+pub trait FunctionRecognizer {
+    fn recognize_low_level_il(
+        &self,
+        _bv: &BinaryView,
+        _func: &Function,
+        _llil: &RegularLowLevelILFunction<CoreArchitecture>,
+    ) -> bool {
+        false
+    }
+
+    fn recognize_medium_level_il(
+        &self,
+        _bv: &BinaryView,
+        _func: &Function,
+        _mlil: &MediumLevelILFunction,
+    ) -> bool {
+        false
+    }
+}
+
+fn create_function_recognizer_registration<R>(recognizer: R) -> BNFunctionRecognizer
+where
+    R: 'static + FunctionRecognizer + Send + Sync + Sized,
+{
+    #[repr(C)]
+    struct FunctionRecognizerHandlerContext<R>
+    where
+        R: 'static + FunctionRecognizer + Send + Sync,
+    {
+        recognizer: R,
+    }
+
+    extern "C" fn cb_recognize_low_level_il<R>(
+        ctxt: *mut c_void,
+        bv: *mut BNBinaryView,
+        func: *mut BNFunction,
+        llil: *mut BNLowLevelILFunction,
+    ) -> bool
+    where
+        R: 'static + FunctionRecognizer + Send + Sync,
+    {
+        let context = unsafe { &*(ctxt as *mut FunctionRecognizerHandlerContext<R>) };
+        let bv = unsafe { BinaryView::from_raw(bv).to_owned() };
+        let func = unsafe { Function::from_raw(func).to_owned() };
+        let llil = unsafe { LowLevelILFunction::from_raw(func.arch(), llil).to_owned() };
+        context.recognizer.recognize_low_level_il(&bv, &func, &llil)
+    }
+
+    extern "C" fn cb_recognize_medium_level_il<R>(
+        ctxt: *mut c_void,
+        bv: *mut BNBinaryView,
+        func: *mut BNFunction,
+        mlil: *mut BNMediumLevelILFunction,
+    ) -> bool
+    where
+        R: 'static + FunctionRecognizer + Send + Sync,
+    {
+        let context = unsafe { &*(ctxt as *mut FunctionRecognizerHandlerContext<R>) };
+        let bv = unsafe { BinaryView::from_raw(bv).to_owned() };
+        let func = unsafe { Function::from_raw(func).to_owned() };
+        let mlil = unsafe { MediumLevelILFunction::from_raw(mlil).to_owned() };
+        context
+            .recognizer
+            .recognize_medium_level_il(&bv, &func, &mlil)
+    }
+
+    let recognizer = FunctionRecognizerHandlerContext { recognizer };
+    // TODO: Currently we leak `recognizer`.
+    let raw = Box::into_raw(Box::new(recognizer));
+    BNFunctionRecognizer {
+        context: raw as *mut _,
+        recognizeLowLevelIL: Some(cb_recognize_low_level_il::<R>),
+        recognizeMediumLevelIL: Some(cb_recognize_medium_level_il::<R>),
+    }
+}
+
+pub fn register_global_function_recognizer<R>(recognizer: R)
+where
+    R: 'static + FunctionRecognizer + Send + Sync + Sized,
+{
+    let mut recognizer = create_function_recognizer_registration::<R>(recognizer);
+    unsafe {
+        BNRegisterGlobalFunctionRecognizer(&mut recognizer);
+    }
+}
+
+pub(crate) fn register_arch_function_recognizer<R>(arch: &CoreArchitecture, recognizer: R)
+where
+    R: 'static + FunctionRecognizer + Send + Sync + Sized,
+{
+    let mut recognizer = create_function_recognizer_registration::<R>(recognizer);
+    unsafe {
+        BNRegisterArchitectureFunctionRecognizer(arch.handle, &mut recognizer);
+    }
+}