Initial support for xex patching

src/xenia/kernel/kernel_state.cc

@@ -406,6 +406,9 @@ object_ref<UserModule> KernelState::LoadUserModule(
   }
 
   module->Dump();
+  emulator_->patcher()->ApplyPatchesForTitle(memory_, module->title_id(),
+                                             module->hash());
+  emulator_->on_patch_apply();
 
   if (module->is_dll_module() && module->entry_point() && call_entry) {
     // Call DllMain(DLL_PROCESS_ATTACH):

src/xenia/kernel/user_module.cc

@@ -13,6 +13,7 @@
 
 #include "xenia/base/byte_stream.h"
 #include "xenia/base/logging.h"
+#include "xenia/base/xxhash.h"
 #include "xenia/cpu/elf_module.h"
 #include "xenia/cpu/processor.h"
 #include "xenia/cpu/xex_module.h"
@@ -72,6 +73,12 @@ X_STATUS UserModule::LoadFromFile(const std::string_view path) {
 
     // Load the module.
     result = LoadFromMemory(mmap->data(), mmap->size());
+    if (XSUCCEEDED(result)) {
+      XXH3_state_t hash_state;
+      XXH3_64bits_reset(&hash_state);
+      XXH3_64bits_update(&hash_state, mmap->data(), mmap->size());
+      hash_ = XXH3_64bits_digest(&hash_state);
+    }
   } else {
     std::vector<uint8_t> buffer(fs_entry->size());
 
@@ -93,6 +100,12 @@ X_STATUS UserModule::LoadFromFile(const std::string_view path) {
     // Load the module.
     result = LoadFromMemory(buffer.data(), bytes_read);
 
+    // Generate xex hash
+    XXH3_state_t hash_state;
+    XXH3_64bits_reset(&hash_state);
+    XXH3_64bits_update(&hash_state, buffer.data(), bytes_read);
+    hash_ = XXH3_64bits_digest(&hash_state);
+
     // Close the file.
     file->Destroy();
   }
@@ -128,6 +141,7 @@ X_STATUS UserModule::LoadFromFile(const std::string_view path) {
     }
   }
 
+  XELOGI("Module hash: {:16X} for {}", hash_, name_);
   return LoadXexContinue();
 }
 

src/xenia/kernel/user_module.h

@@ -38,6 +38,7 @@ class UserModule : public XModule {
 
   const std::string& path() const override { return path_; }
   const std::string& name() const override { return name_; }
+  uint64_t hash() const { return hash_; }
 
   enum ModuleFormat {
     kModuleFormatUndefined = 0,
@@ -100,6 +101,7 @@ class UserModule : public XModule {
 
   std::string name_;
   std::string path_;
+  uint64_t hash_ = -1;
 
   uint32_t guest_xex_header_ = 0;
   ModuleFormat module_format_ = kModuleFormatUndefined;