rust add tlb callback

bindings/rust/src/ffi.rs

@@ -3,7 +3,7 @@
 
 use crate::{Unicorn, UnicornInner};
 
-use super::unicorn_const::{uc_error, Arch, HookType, MemRegion, MemType, Mode, Query};
+use super::unicorn_const::{uc_error, Arch, HookType, MemRegion, MemType, Mode, Query, TlbEntry};
 use alloc::rc::Weak;
 use core::{cell::UnsafeCell, ffi::c_void};
 use libc::{c_char, c_int};
@@ -252,3 +252,25 @@ where
     debug_assert_eq!(uc, user_data_uc.get_handle());
     (user_data.callback)(&mut user_data_uc);
 }
+
+pub extern "C" fn tlb_lookup_hook_proxy<D, F>(uc: uc_handle, vaddr: u64, mem_type: MemType, result: *mut TlbEntry, user_data: *mut UcHook<D, F>) -> bool
+where
+    F: FnMut(&mut crate::Unicorn<D>, u64, MemType) -> Option<TlbEntry>,
+{
+    let user_data = unsafe { &mut *user_data };
+    let mut user_data_uc = Unicorn {
+        inner: user_data.uc.upgrade().unwrap(),
+    };
+    debug_assert_eq!(uc, user_data_uc.get_handle());
+    let r = (user_data.callback)(&mut user_data_uc, vaddr, mem_type);
+    match r {
+        Some(ref e) => {
+            unsafe {
+                let ref_result: &mut TlbEntry = &mut *result;
+                *ref_result = *e;
+            }
+        },
+        None => {},
+    };
+    return r.is_some();
+}

bindings/rust/src/lib.rs

@@ -885,6 +885,33 @@ impl<'a, D> Unicorn<'a, D> {
         }
     }
 
+    pub fn add_tlb_hook<F>(&mut self, begin: u64, end: u64, callback: F) -> Result<ffi::uc_hook, uc_error>
+    where
+        F: FnMut(&mut crate::Unicorn<D>, u64, MemType) -> Option<TlbEntry> + 'a,
+    {
+        let mut hook_ptr = core::ptr::null_mut();
+        let mut user_data = Box::new(ffi::UcHook {
+            callback,
+            uc: Rc::downgrade(&self.inner),
+        });
+        let err = unsafe {
+            ffi::uc_hook_add(self.get_handle(),
+                &mut hook_ptr,
+                HookType::TLB,
+                ffi::tlb_lookup_hook_proxy::<D, F> as _,
+                user_data.as_mut() as *mut _ as _,
+                begin,
+                end,
+            )
+        };
+        if err == uc_error::OK {
+            self.inner_mut().hooks.push((hook_ptr, user_data));
+            Ok(hook_ptr)
+        } else {
+            Err(err)
+        }
+    }
+
     /// Remove a hook.
     ///
     /// `hook` is the value returned by `add_*_hook` functions.

bindings/rust/src/unicorn_const.rs

@@ -93,6 +93,8 @@ bitflags! {
         const MEM_INVALID = Self::MEM_READ_INVALID.bits | Self::MEM_WRITE_INVALID.bits | Self::MEM_FETCH_INVALID.bits;
 
         const MEM_ALL = Self::MEM_VALID.bits | Self::MEM_INVALID.bits;
+
+        const TLB = (1 << 17);
     }
 }
 
@@ -239,3 +241,10 @@ pub enum ControlType {
     UC_CTL_IO_READ = 1<<31,
     UC_CTL_IO_WRITE = 1<<30,
 }
+
+#[repr(C)]
+#[derive(Debug, Clone, Copy)]
+pub struct TlbEntry {
+    pub paddr: u64,
+    pub perms: Permission,
+}