fx

Signed-off-by: lizzie <lizzie@eden-emu.dev>

src/dynarmic/src/dynarmic/backend/arm64/devirtualize.h

@@ -14,6 +14,14 @@
 
 namespace Dynarmic::Backend::Arm64 {
 
+namespace impl {
+template<typename T, typename P> inline T bit_cast_pointee(const P source_ptr) noexcept {
+    std::aligned_storage_t<sizeof(T), alignof(T)> dest;
+    std::memcpy(&dest, bit_cast<void*>(source_ptr), sizeof(T));
+    return reinterpret_cast<T&>(dest);
+}
+};
+
 struct DevirtualizedCall {
     u64 fn_ptr;
     u64 this_ptr;
@@ -42,8 +50,8 @@ DevirtualizedCall DevirtualizeDefault(mcl::class_type<decltype(mfp)>* this_) {
     u64 fn_ptr = mfp_struct.ptr;
     u64 this_ptr = std::bit_cast<u64>(this_) + (mfp_struct.adj >> 1);
     if (mfp_struct.adj & 1) {
-        u64 vtable = *reinterpret_cast<u64 const*>(this_ptr);
-        fn_ptr = *reinterpret_cast<u64 const*>(vtable + fn_ptr);
+        u64 vtable = impl::bit_cast_pointee<u64>(this_ptr);
+        fn_ptr = impl::bit_cast_pointee<u64>(vtable + fn_ptr);
     }
     return DevirtualizedCall{fn_ptr, this_ptr};
 }

src/dynarmic/src/dynarmic/backend/x64/devirtualize.h

@@ -32,6 +32,12 @@ struct ThunkBuilder<R (C::*)(Args...), mfp> {
     }
 };
 
+template<typename T, typename P> inline T bit_cast_pointee(const P source_ptr) noexcept {
+    std::aligned_storage_t<sizeof(T), alignof(T)> dest;
+    std::memcpy(&dest, bit_cast<void*>(source_ptr), sizeof(T));
+    return reinterpret_cast<T&>(dest);
+}
+
 }  // namespace impl
 
 template<auto mfp>
@@ -61,8 +67,8 @@ ArgCallback DevirtualizeItanium(mcl::class_type<decltype(mfp)>* this_) {
     u64 fn_ptr = mfp_struct.ptr;
     u64 this_ptr = reinterpret_cast<u64>(this_) + mfp_struct.adj;
     if (mfp_struct.ptr & 1) {
-        u64 vtable = *reinterpret_cast<u64 const*>(this_ptr);
-        fn_ptr = *reinterpret_cast<u64 const*>(vtable + fn_ptr - 1);
+        u64 vtable = impl::bit_cast_pointee<u64>(this_ptr);
+        fn_ptr = impl::bit_cast_pointee<u64>(vtable + fn_ptr - 1);
     }
     return ArgCallback{fn_ptr, this_ptr};
 }