loader: Add support for NRO, as well as various fixes and shared linker.

src/core/loader/nro.h

@@ -0,0 +1,45 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <map>
+#include <string>
+#include "common/common_types.h"
+#include "common/file_util.h"
+#include "core/hle/kernel/kernel.h"
+#include "core/loader/linker.h"
+#include "core/loader/loader.h"
+
+namespace Loader {
+
+/// Loads an NRO file
+class AppLoader_NRO final : public AppLoader, Linker {
+public:
+    AppLoader_NRO(FileUtil::IOFile&& file, std::string filename, std::string filepath)
+        : AppLoader(std::move(file)), filename(std::move(filename)), filepath(std::move(filepath)) {
+    }
+
+    /**
+     * Returns the type of the file
+     * @param file FileUtil::IOFile open file
+     * @return FileType found, or FileType::Error if this loader doesn't know it
+     */
+    static FileType IdentifyType(FileUtil::IOFile& file);
+
+    FileType GetFileType() override {
+        return IdentifyType(file);
+    }
+
+    ResultStatus Load() override;
+
+private:
+    VAddr GetEntryPoint(VAddr load_base) const;
+    bool LoadNro(const std::string& path, VAddr load_base);
+
+    std::string filename;
+    std::string filepath;
+};
+
+} // namespace Loader