12 files changed, 540 insertions, 140 deletions

diff --git a/src/core/loader/deconstructed_rom_directory.cpp b/src/core/loader/deconstructed_rom_directory.cpp
index 0b3b4cd73..eb7feb617 100644
--- a/src/core/loader/deconstructed_rom_directory.cpp
+++ b/src/core/loader/deconstructed_rom_directory.cpp
@@ -4,10 +4,11 @@
 
 #include <cinttypes>
 #include "common/common_funcs.h"
+#include "common/common_paths.h"
 #include "common/file_util.h"
 #include "common/logging/log.h"
 #include "common/string_util.h"
-#include "core/file_sys/content_archive.h"
+#include "core/file_sys/romfs_factory.h"
 #include "core/hle/kernel/process.h"
 #include "core/hle/kernel/resource_limit.h"
 #include "core/hle/service/filesystem/filesystem.h"
@@ -45,11 +46,55 @@ static std::string FindRomFS(const std::string& directory) {
     return filepath_romfs;
 }
 
-AppLoader_DeconstructedRomDirectory::AppLoader_DeconstructedRomDirectory(FileSys::VirtualFile file)
-    : AppLoader(std::move(file)) {}
+AppLoader_DeconstructedRomDirectory::AppLoader_DeconstructedRomDirectory(FileUtil::IOFile&& file,
+                                                                         std::string filepath)
+    : AppLoader(std::move(file)), filepath(std::move(filepath)) {}
+
+FileType AppLoader_DeconstructedRomDirectory::IdentifyType(FileUtil::IOFile& file,
+                                                           const std::string& filepath) {
+    bool is_main_found{};
+    bool is_npdm_found{};
+    bool is_rtld_found{};
+    bool is_sdk_found{};
+
+    const auto callback = [&](unsigned* num_entries_out, const std::string& directory,
+                              const std::string& virtual_name) -> bool {
+        // Skip directories
+        std::string physical_name = directory + virtual_name;
+        if (FileUtil::IsDirectory(physical_name)) {
+            return true;
+        }
+
+        // Verify filename
+        if (Common::ToLower(virtual_name) == "main") {
+            is_main_found = true;
+        } else if (Common::ToLower(virtual_name) == "main.npdm") {
+            is_npdm_found = true;
+            return true;
+        } else if (Common::ToLower(virtual_name) == "rtld") {
+            is_rtld_found = true;
+        } else if (Common::ToLower(virtual_name) == "sdk") {
+            is_sdk_found = true;
+        } else {
+            // Continue searching
+            return true;
+        }
+
+        // Verify file is an NSO
+        FileUtil::IOFile file(physical_name, "rb");
+        if (AppLoader_NSO::IdentifyType(file, physical_name) != FileType::NSO) {
+            return false;
+        }
+
+        // We are done if we've found and verified all required NSOs
+        return !(is_main_found && is_npdm_found && is_rtld_found && is_sdk_found);
+    };
+
+    // Search the directory recursively, looking for the required modules
+    const std::string directory = filepath.substr(0, filepath.find_last_of("/\\")) + DIR_SEP;
+    FileUtil::ForeachDirectoryEntry(nullptr, directory, callback);
 
-FileType AppLoader_DeconstructedRomDirectory::IdentifyType(const FileSys::VirtualFile& file) {
-    if (FileSys::IsDirectoryExeFS(file->GetContainingDirectory())) {
+    if (is_main_found && is_npdm_found && is_rtld_found && is_sdk_found) {
         return FileType::DeconstructedRomDirectory;
     }
 
@@ -61,13 +106,14 @@ ResultStatus AppLoader_DeconstructedRomDirectory::Load(
     if (is_loaded) {
         return ResultStatus::ErrorAlreadyLoaded;
     }
+    if (!file.IsOpen()) {
+        return ResultStatus::Error;
+    }
 
-    const FileSys::VirtualDir dir = file->GetContainingDirectory();
-    const FileSys::VirtualFile npdm = dir->GetFile("main.npdm");
-    if (npdm == nullptr)
-        return ResultStatus::ErrorInvalidFormat;
+    const std::string directory = filepath.substr(0, filepath.find_last_of("/\\")) + DIR_SEP;
+    const std::string npdm_path = directory + DIR_SEP + "main.npdm";
 
-    ResultStatus result = metadata.Load(npdm);
+    ResultStatus result = metadata.Load(npdm_path);
     if (result != ResultStatus::Success) {
         return result;
     }
@@ -82,10 +128,9 @@ ResultStatus AppLoader_DeconstructedRomDirectory::Load(
     VAddr next_load_addr{Memory::PROCESS_IMAGE_VADDR};
     for (const auto& module : {"rtld", "main", "subsdk0", "subsdk1", "subsdk2", "subsdk3",
                                "subsdk4", "subsdk5", "subsdk6", "subsdk7", "sdk"}) {
+        const std::string path = directory + DIR_SEP + module;
         const VAddr load_addr = next_load_addr;
-        const FileSys::VirtualFile module_file = dir->GetFile(module);
-        if (module_file != nullptr)
-            next_load_addr = AppLoader_NSO::LoadModule(module_file, load_addr);
+        next_load_addr = AppLoader_NSO::LoadModule(path, load_addr);
         if (next_load_addr) {
             LOG_DEBUG(Loader, "loaded module {} @ 0x{:X}", module, load_addr);
         } else {
@@ -102,20 +147,42 @@ ResultStatus AppLoader_DeconstructedRomDirectory::Load(
                  metadata.GetMainThreadStackSize());
 
     // Find the RomFS by searching for a ".romfs" file in this directory
-    const auto& files = dir->GetFiles();
-    const auto romfs_iter =
-        std::find_if(files.begin(), files.end(), [](const FileSys::VirtualFile& file) {
-            return file->GetName().find(".romfs") != std::string::npos;
-        });
-
-    // TODO(DarkLordZach): Identify RomFS if its a subdirectory.
-    const auto romfs = (romfs_iter == files.end()) ? nullptr : *romfs_iter;
+    filepath_romfs = FindRomFS(directory);
 
-    if (romfs != nullptr)
-        Service::FileSystem::RegisterRomFS(romfs);
+    // Register the RomFS if a ".romfs" file was found
+    if (!filepath_romfs.empty()) {
+        Service::FileSystem::RegisterFileSystem(std::make_unique<FileSys::RomFS_Factory>(*this),
+                                                Service::FileSystem::Type::RomFS);
+    }
 
     is_loaded = true;
     return ResultStatus::Success;
 }
 
+ResultStatus AppLoader_DeconstructedRomDirectory::ReadRomFS(
+    std::shared_ptr<FileUtil::IOFile>& romfs_file, u64& offset, u64& size) {
+
+    if (filepath_romfs.empty()) {
+        LOG_DEBUG(Loader, "No RomFS available");
+        return ResultStatus::ErrorNotUsed;
+    }
+
+    // We reopen the file, to allow its position to be independent
+    romfs_file = std::make_shared<FileUtil::IOFile>(filepath_romfs, "rb");
+    if (!romfs_file->IsOpen()) {
+        return ResultStatus::Error;
+    }
+
+    offset = 0;
+    size = romfs_file->GetSize();
+
+    LOG_DEBUG(Loader, "RomFS offset:           0x{:016X}", offset);
+    LOG_DEBUG(Loader, "RomFS size:             0x{:016X}", size);
+
+    // Reset read pointer
+    file.Seek(0, SEEK_SET);
+
+    return ResultStatus::Success;
+}
+
 } // namespace Loader
diff --git a/src/core/loader/deconstructed_rom_directory.h b/src/core/loader/deconstructed_rom_directory.h
index 494220756..23295d911 100644
--- a/src/core/loader/deconstructed_rom_directory.h
+++ b/src/core/loader/deconstructed_rom_directory.h
@@ -20,22 +20,28 @@ namespace Loader {
  */
 class AppLoader_DeconstructedRomDirectory final : public AppLoader {
 public:
-    explicit AppLoader_DeconstructedRomDirectory(FileSys::VirtualFile main_file);
+    AppLoader_DeconstructedRomDirectory(FileUtil::IOFile&& file, std::string filepath);
 
     /**
      * Returns the type of the file
-     * @param file std::shared_ptr<VfsFile> open file
+     * @param file FileUtil::IOFile open file
+     * @param filepath Path of the file that we are opening.
      * @return FileType found, or FileType::Error if this loader doesn't know it
      */
-    static FileType IdentifyType(const FileSys::VirtualFile& file);
+    static FileType IdentifyType(FileUtil::IOFile& file, const std::string& filepath);
 
     FileType GetFileType() override {
-        return IdentifyType(file);
+        return IdentifyType(file, filepath);
     }
 
     ResultStatus Load(Kernel::SharedPtr<Kernel::Process>& process) override;
 
+    ResultStatus ReadRomFS(std::shared_ptr<FileUtil::IOFile>& romfs_file, u64& offset,
+                           u64& size) override;
+
 private:
+    std::string filepath_romfs;
+    std::string filepath;
     FileSys::ProgramMetadata metadata;
 };
 
diff --git a/src/core/loader/elf.cpp b/src/core/loader/elf.cpp
index 4bfd5f536..b69e5c6ef 100644
--- a/src/core/loader/elf.cpp
+++ b/src/core/loader/elf.cpp
@@ -365,17 +365,20 @@ SectionID ElfReader::GetSectionByName(const char* name, int firstSection) const
 
 namespace Loader {
 
-AppLoader_ELF::AppLoader_ELF(FileSys::VirtualFile file) : AppLoader(std::move(file)) {}
+AppLoader_ELF::AppLoader_ELF(FileUtil::IOFile&& file, std::string filename)
+    : AppLoader(std::move(file)), filename(std::move(filename)) {}
 
-FileType AppLoader_ELF::IdentifyType(const FileSys::VirtualFile& file) {
+FileType AppLoader_ELF::IdentifyType(FileUtil::IOFile& file, const std::string&) {
     static constexpr u16 ELF_MACHINE_ARM{0x28};
 
     u32 magic = 0;
-    if (4 != file->ReadObject(&magic))
+    file.Seek(0, SEEK_SET);
+    if (1 != file.ReadArray<u32>(&magic, 1))
         return FileType::Error;
 
     u16 machine = 0;
-    if (2 != file->ReadObject(&machine, 18))
+    file.Seek(18, SEEK_SET);
+    if (1 != file.ReadArray<u16>(&machine, 1))
         return FileType::Error;
 
     if (Common::MakeMagic('\x7f', 'E', 'L', 'F') == magic && ELF_MACHINE_ARM == machine)
@@ -388,13 +391,20 @@ ResultStatus AppLoader_ELF::Load(Kernel::SharedPtr<Kernel::Process>& process) {
     if (is_loaded)
         return ResultStatus::ErrorAlreadyLoaded;
 
-    std::vector<u8> buffer = file->ReadAllBytes();
-    if (buffer.size() != file->GetSize())
+    if (!file.IsOpen())
+        return ResultStatus::Error;
+
+    // Reset read pointer in case this file has been read before.
+    file.Seek(0, SEEK_SET);
+
+    size_t size = file.GetSize();
+    std::unique_ptr<u8[]> buffer(new u8[size]);
+    if (file.ReadBytes(&buffer[0], size) != size)
         return ResultStatus::Error;
 
     ElfReader elf_reader(&buffer[0]);
     SharedPtr<CodeSet> codeset = elf_reader.LoadInto(Memory::PROCESS_IMAGE_VADDR);
-    codeset->name = file->GetName();
+    codeset->name = filename;
 
     process->LoadModule(codeset, codeset->entrypoint);
     process->svc_access_mask.set();
diff --git a/src/core/loader/elf.h b/src/core/loader/elf.h
index b8fb982d0..ee741a789 100644
--- a/src/core/loader/elf.h
+++ b/src/core/loader/elf.h
@@ -16,20 +16,24 @@ namespace Loader {
 /// Loads an ELF/AXF file
 class AppLoader_ELF final : public AppLoader {
 public:
-    explicit AppLoader_ELF(FileSys::VirtualFile file);
+    AppLoader_ELF(FileUtil::IOFile&& file, std::string filename);
 
     /**
      * Returns the type of the file
-     * @param file std::shared_ptr<VfsFile> open file
+     * @param file FileUtil::IOFile open file
+     * @param filepath Path of the file that we are opening.
      * @return FileType found, or FileType::Error if this loader doesn't know it
      */
-    static FileType IdentifyType(const FileSys::VirtualFile& file);
+    static FileType IdentifyType(FileUtil::IOFile& file, const std::string& filepath);
 
     FileType GetFileType() override {
-        return IdentifyType(file);
+        return IdentifyType(file, filename);
     }
 
     ResultStatus Load(Kernel::SharedPtr<Kernel::Process>& process) override;
+
+private:
+    std::string filename;
 };
 
 } // namespace Loader
diff --git a/src/core/loader/loader.cpp b/src/core/loader/loader.cpp
index 1574345a1..8831d8e83 100644
--- a/src/core/loader/loader.cpp
+++ b/src/core/loader/loader.cpp
@@ -6,7 +6,6 @@
 #include <string>
 #include "common/logging/log.h"
 #include "common/string_util.h"
-#include "core/file_sys/vfs_real.h"
 #include "core/hle/kernel/process.h"
 #include "core/loader/deconstructed_rom_directory.h"
 #include "core/loader/elf.h"
@@ -22,11 +21,11 @@ const std::initializer_list<Kernel::AddressMapping> default_address_mappings = {
     {0x1F000000, 0x600000, false}, // entire VRAM
 };
 
-FileType IdentifyFile(FileSys::VirtualFile file) {
+FileType IdentifyFile(FileUtil::IOFile& file, const std::string& filepath) {
     FileType type;
 
 #define CHECK_TYPE(loader)                                                                         \
-    type = AppLoader_##loader::IdentifyType(file);                                                 \
+    type = AppLoader_##loader::IdentifyType(file, filepath);                                       \
     if (FileType::Error != type)                                                                   \
         return type;
 
@@ -42,22 +41,25 @@ FileType IdentifyFile(FileSys::VirtualFile file) {
 }
 
 FileType IdentifyFile(const std::string& file_name) {
-    return IdentifyFile(FileSys::VirtualFile(std::make_shared<FileSys::RealVfsFile>(file_name)));
-}
+    FileUtil::IOFile file(file_name, "rb");
+    if (!file.IsOpen()) {
+        LOG_ERROR(Loader, "Failed to load file {}", file_name);
+        return FileType::Unknown;
+    }
 
-FileType GuessFromFilename(const std::string& name) {
-    if (name == "main")
-        return FileType::DeconstructedRomDirectory;
+    return IdentifyFile(file, file_name);
+}
 
-    const std::string extension = Common::ToLower(FileUtil::GetExtensionFromFilename(name));
+FileType GuessFromExtension(const std::string& extension_) {
+    std::string extension = Common::ToLower(extension_);
 
-    if (extension == "elf")
+    if (extension == ".elf")
         return FileType::ELF;
-    if (extension == "nro")
+    else if (extension == ".nro")
         return FileType::NRO;
-    if (extension == "nso")
+    else if (extension == ".nso")
         return FileType::NSO;
-    if (extension == "nca")
+    else if (extension == ".nca")
         return FileType::NCA;
 
     return FileType::Unknown;
@@ -91,47 +93,58 @@ const char* GetFileTypeString(FileType type) {
  * @param filepath the file full path (with name)
  * @return std::unique_ptr<AppLoader> a pointer to a loader object;  nullptr for unsupported type
  */
-static std::unique_ptr<AppLoader> GetFileLoader(FileSys::VirtualFile file, FileType type) {
+static std::unique_ptr<AppLoader> GetFileLoader(FileUtil::IOFile&& file, FileType type,
+                                                const std::string& filename,
+                                                const std::string& filepath) {
     switch (type) {
 
     // Standard ELF file format.
     case FileType::ELF:
-        return std::make_unique<AppLoader_ELF>(std::move(file));
+        return std::make_unique<AppLoader_ELF>(std::move(file), filename);
 
     // NX NSO file format.
     case FileType::NSO:
-        return std::make_unique<AppLoader_NSO>(std::move(file));
+        return std::make_unique<AppLoader_NSO>(std::move(file), filepath);
 
     // NX NRO file format.
     case FileType::NRO:
-        return std::make_unique<AppLoader_NRO>(std::move(file));
+        return std::make_unique<AppLoader_NRO>(std::move(file), filepath);
 
     // NX NCA file format.
     case FileType::NCA:
-        return std::make_unique<AppLoader_NCA>(std::move(file));
+        return std::make_unique<AppLoader_NCA>(std::move(file), filepath);
 
     // NX deconstructed ROM directory.
     case FileType::DeconstructedRomDirectory:
-        return std::make_unique<AppLoader_DeconstructedRomDirectory>(std::move(file));
+        return std::make_unique<AppLoader_DeconstructedRomDirectory>(std::move(file), filepath);
 
     default:
         return nullptr;
     }
 }
 
-std::unique_ptr<AppLoader> GetLoader(FileSys::VirtualFile file) {
-    FileType type = IdentifyFile(file);
-    FileType filename_type = GuessFromFilename(file->GetName());
+std::unique_ptr<AppLoader> GetLoader(const std::string& filename) {
+    FileUtil::IOFile file(filename, "rb");
+    if (!file.IsOpen()) {
+        LOG_ERROR(Loader, "Failed to load file {}", filename);
+        return nullptr;
+    }
+
+    std::string filename_filename, filename_extension;
+    Common::SplitPath(filename, nullptr, &filename_filename, &filename_extension);
+
+    FileType type = IdentifyFile(file, filename);
+    FileType filename_type = GuessFromExtension(filename_extension);
 
     if (type != filename_type) {
-        LOG_WARNING(Loader, "File {} has a different type than its extension.", file->GetName());
+        LOG_WARNING(Loader, "File {} has a different type than its extension.", filename);
         if (FileType::Unknown == type)
             type = filename_type;
     }
 
-    LOG_DEBUG(Loader, "Loading file {} as {}...", file->GetName(), GetFileTypeString(type));
+    LOG_DEBUG(Loader, "Loading file {} as {}...", filename, GetFileTypeString(type));
 
-    return GetFileLoader(std::move(file), type);
+    return GetFileLoader(std::move(file), type, filename_filename, filename);
 }
 
 } // namespace Loader
diff --git a/src/core/loader/loader.h b/src/core/loader/loader.h
index 1da9e8099..b76f7b13d 100644
--- a/src/core/loader/loader.h
+++ b/src/core/loader/loader.h
@@ -13,7 +13,6 @@
 #include <boost/optional.hpp>
 #include "common/common_types.h"
 #include "common/file_util.h"
-#include "core/file_sys/vfs.h"
 #include "core/hle/kernel/kernel.h"
 
 namespace Kernel {
@@ -37,9 +36,10 @@ enum class FileType {
 /**
  * Identifies the type of a bootable file based on the magic value in its header.
  * @param file open file
+ * @param filepath Path of the file that we are opening.
  * @return FileType of file
  */
-FileType IdentifyFile(FileSys::VirtualFile file);
+FileType IdentifyFile(FileUtil::IOFile& file, const std::string& filepath);
 
 /**
  * Identifies the type of a bootable file based on the magic value in its header.
@@ -50,12 +50,12 @@ FileType IdentifyFile(FileSys::VirtualFile file);
 FileType IdentifyFile(const std::string& file_name);
 
 /**
- * Guess the type of a bootable file from its name
- * @param name String name of bootable file
+ * Guess the type of a bootable file from its extension
+ * @param extension String extension of bootable file
  * @return FileType of file. Note: this will return FileType::Unknown if it is unable to determine
  * a filetype, and will never return FileType::Error.
  */
-FileType GuessFromFilename(const std::string& name);
+FileType GuessFromExtension(const std::string& extension);
 
 /**
  * Convert a FileType into a string which can be displayed to the user.
@@ -79,7 +79,7 @@ enum class ResultStatus {
 /// Interface for loading an application
 class AppLoader : NonCopyable {
 public:
-    AppLoader(FileSys::VirtualFile file) : file(std::move(file)) {}
+    AppLoader(FileUtil::IOFile&& file) : file(std::move(file)) {}
     virtual ~AppLoader() {}
 
     /**
@@ -154,20 +154,26 @@ public:
     /**
      * Get the RomFS of the application
      * Since the RomFS can be huge, we return a file reference instead of copying to a buffer
-     * @param file The file containing the RomFS
+     * @param romfs_file The file containing the RomFS
+     * @param offset The offset the romfs begins on
+     * @param size The size of the romfs
      * @return ResultStatus result of function
      */
-    virtual ResultStatus ReadRomFS(FileSys::VirtualFile& dir) {
+    virtual ResultStatus ReadRomFS(std::shared_ptr<FileUtil::IOFile>& romfs_file, u64& offset,
+                                   u64& size) {
         return ResultStatus::ErrorNotImplemented;
     }
 
     /**
      * Get the update RomFS of the application
      * Since the RomFS can be huge, we return a file reference instead of copying to a buffer
-     * @param file The file containing the RomFS
+     * @param romfs_file The file containing the RomFS
+     * @param offset The offset the romfs begins on
+     * @param size The size of the romfs
      * @return ResultStatus result of function
      */
-    virtual ResultStatus ReadUpdateRomFS(FileSys::VirtualFile& file) {
+    virtual ResultStatus ReadUpdateRomFS(std::shared_ptr<FileUtil::IOFile>& romfs_file, u64& offset,
+                                         u64& size) {
         return ResultStatus::ErrorNotImplemented;
     }
 
@@ -181,7 +187,7 @@ public:
     }
 
 protected:
-    FileSys::VirtualFile file;
+    FileUtil::IOFile file;
     bool is_loaded = false;
 };
 
@@ -196,6 +202,6 @@ extern const std::initializer_list<Kernel::AddressMapping> default_address_mappi
  * @param filename String filename of bootable file
  * @return best loader for this file
  */
-std::unique_ptr<AppLoader> GetLoader(FileSys::VirtualFile file);
+std::unique_ptr<AppLoader> GetLoader(const std::string& filename);
 
 } // namespace Loader
diff --git a/src/core/loader/nca.cpp b/src/core/loader/nca.cpp
index 874f42b91..da064f8e3 100644
--- a/src/core/loader/nca.cpp
+++ b/src/core/loader/nca.cpp
@@ -4,11 +4,13 @@
 
 #include <vector>
 
+#include "common/common_funcs.h"
 #include "common/file_util.h"
 #include "common/logging/log.h"
+#include "common/swap.h"
 #include "core/core.h"
-#include "core/file_sys/content_archive.h"
 #include "core/file_sys/program_metadata.h"
+#include "core/file_sys/romfs_factory.h"
 #include "core/hle/kernel/process.h"
 #include "core/hle/kernel/resource_limit.h"
 #include "core/hle/service/filesystem/filesystem.h"
@@ -18,15 +20,208 @@
 
 namespace Loader {
 
-AppLoader_NCA::AppLoader_NCA(FileSys::VirtualFile file) : AppLoader(file) {}
+// Media offsets in headers are stored divided by 512. Mult. by this to get real offset.
+constexpr u64 MEDIA_OFFSET_MULTIPLIER = 0x200;
 
-FileType AppLoader_NCA::IdentifyType(const FileSys::VirtualFile& file) {
-    // TODO(DarkLordZach): Assuming everything is decrypted. Add crypto support.
-    FileSys::NCAHeader header{};
-    if (sizeof(FileSys::NCAHeader) != file->ReadObject(&header))
+constexpr u64 SECTION_HEADER_SIZE = 0x200;
+constexpr u64 SECTION_HEADER_OFFSET = 0x400;
+
+enum class NcaContentType : u8 { Program = 0, Meta = 1, Control = 2, Manual = 3, Data = 4 };
+
+enum class NcaSectionFilesystemType : u8 { PFS0 = 0x2, ROMFS = 0x3 };
+
+struct NcaSectionTableEntry {
+    u32_le media_offset;
+    u32_le media_end_offset;
+    INSERT_PADDING_BYTES(0x8);
+};
+static_assert(sizeof(NcaSectionTableEntry) == 0x10, "NcaSectionTableEntry has incorrect size.");
+
+struct NcaHeader {
+    std::array<u8, 0x100> rsa_signature_1;
+    std::array<u8, 0x100> rsa_signature_2;
+    u32_le magic;
+    u8 is_system;
+    NcaContentType content_type;
+    u8 crypto_type;
+    u8 key_index;
+    u64_le size;
+    u64_le title_id;
+    INSERT_PADDING_BYTES(0x4);
+    u32_le sdk_version;
+    u8 crypto_type_2;
+    INSERT_PADDING_BYTES(15);
+    std::array<u8, 0x10> rights_id;
+    std::array<NcaSectionTableEntry, 0x4> section_tables;
+    std::array<std::array<u8, 0x20>, 0x4> hash_tables;
+    std::array<std::array<u8, 0x10>, 0x4> key_area;
+    INSERT_PADDING_BYTES(0xC0);
+};
+static_assert(sizeof(NcaHeader) == 0x400, "NcaHeader has incorrect size.");
+
+struct NcaSectionHeaderBlock {
+    INSERT_PADDING_BYTES(3);
+    NcaSectionFilesystemType filesystem_type;
+    u8 crypto_type;
+    INSERT_PADDING_BYTES(3);
+};
+static_assert(sizeof(NcaSectionHeaderBlock) == 0x8, "NcaSectionHeaderBlock has incorrect size.");
+
+struct Pfs0Superblock {
+    NcaSectionHeaderBlock header_block;
+    std::array<u8, 0x20> hash;
+    u32_le size;
+    INSERT_PADDING_BYTES(4);
+    u64_le hash_table_offset;
+    u64_le hash_table_size;
+    u64_le pfs0_header_offset;
+    u64_le pfs0_size;
+    INSERT_PADDING_BYTES(432);
+};
+static_assert(sizeof(Pfs0Superblock) == 0x200, "Pfs0Superblock has incorrect size.");
+
+static bool IsValidNca(const NcaHeader& header) {
+    return header.magic == Common::MakeMagic('N', 'C', 'A', '2') ||
+           header.magic == Common::MakeMagic('N', 'C', 'A', '3');
+}
+
+// TODO(DarkLordZach): Add support for encrypted.
+class Nca final {
+    std::vector<FileSys::PartitionFilesystem> pfs;
+    std::vector<u64> pfs_offset;
+
+    u64 romfs_offset = 0;
+    u64 romfs_size = 0;
+
+    boost::optional<u8> exefs_id = boost::none;
+
+    FileUtil::IOFile file;
+    std::string path;
+
+    u64 GetExeFsFileOffset(const std::string& file_name) const;
+    u64 GetExeFsFileSize(const std::string& file_name) const;
+
+public:
+    ResultStatus Load(FileUtil::IOFile&& file, std::string path);
+
+    FileSys::PartitionFilesystem GetPfs(u8 id) const;
+
+    u64 GetRomFsOffset() const;
+    u64 GetRomFsSize() const;
+
+    std::vector<u8> GetExeFsFile(const std::string& file_name);
+};
+
+static bool IsPfsExeFs(const FileSys::PartitionFilesystem& pfs) {
+    // According to switchbrew, an exefs must only contain these two files:
+    return pfs.GetFileSize("main") > 0 && pfs.GetFileSize("main.npdm") > 0;
+}
+
+ResultStatus Nca::Load(FileUtil::IOFile&& in_file, std::string in_path) {
+    file = std::move(in_file);
+    path = in_path;
+    file.Seek(0, SEEK_SET);
+    std::array<u8, sizeof(NcaHeader)> header_array{};
+    if (sizeof(NcaHeader) != file.ReadBytes(header_array.data(), sizeof(NcaHeader)))
+        LOG_CRITICAL(Loader, "File reader errored out during header read.");
+
+    NcaHeader header{};
+    std::memcpy(&header, header_array.data(), sizeof(NcaHeader));
+    if (!IsValidNca(header))
+        return ResultStatus::ErrorInvalidFormat;
+
+    int number_sections =
+        std::count_if(std::begin(header.section_tables), std::end(header.section_tables),
+                      [](NcaSectionTableEntry entry) { return entry.media_offset > 0; });
+
+    for (int i = 0; i < number_sections; ++i) {
+        // Seek to beginning of this section.
+        file.Seek(SECTION_HEADER_OFFSET + i * SECTION_HEADER_SIZE, SEEK_SET);
+        std::array<u8, sizeof(NcaSectionHeaderBlock)> array{};
+        if (sizeof(NcaSectionHeaderBlock) !=
+            file.ReadBytes(array.data(), sizeof(NcaSectionHeaderBlock)))
+            LOG_CRITICAL(Loader, "File reader errored out during header read.");
+
+        NcaSectionHeaderBlock block{};
+        std::memcpy(&block, array.data(), sizeof(NcaSectionHeaderBlock));
+
+        if (block.filesystem_type == NcaSectionFilesystemType::ROMFS) {
+            romfs_offset = header.section_tables[i].media_offset * MEDIA_OFFSET_MULTIPLIER;
+            romfs_size =
+                header.section_tables[i].media_end_offset * MEDIA_OFFSET_MULTIPLIER - romfs_offset;
+        } else if (block.filesystem_type == NcaSectionFilesystemType::PFS0) {
+            Pfs0Superblock sb{};
+            // Seek back to beginning of this section.
+            file.Seek(SECTION_HEADER_OFFSET + i * SECTION_HEADER_SIZE, SEEK_SET);
+            if (sizeof(Pfs0Superblock) != file.ReadBytes(&sb, sizeof(Pfs0Superblock)))
+                LOG_CRITICAL(Loader, "File reader errored out during header read.");
+
+            u64 offset = (static_cast<u64>(header.section_tables[i].media_offset) *
+                          MEDIA_OFFSET_MULTIPLIER) +
+                         sb.pfs0_header_offset;
+            FileSys::PartitionFilesystem npfs{};
+            ResultStatus status = npfs.Load(path, offset);
+
+            if (status == ResultStatus::Success) {
+                pfs.emplace_back(std::move(npfs));
+                pfs_offset.emplace_back(offset);
+            }
+        }
+    }
+
+    for (size_t i = 0; i < pfs.size(); ++i) {
+        if (IsPfsExeFs(pfs[i]))
+            exefs_id = i;
+    }
+
+    return ResultStatus::Success;
+}
+
+FileSys::PartitionFilesystem Nca::GetPfs(u8 id) const {
+    return pfs[id];
+}
+
+u64 Nca::GetExeFsFileOffset(const std::string& file_name) const {
+    if (exefs_id == boost::none)
+        return 0;
+    return pfs[*exefs_id].GetFileOffset(file_name) + pfs_offset[*exefs_id];
+}
+
+u64 Nca::GetExeFsFileSize(const std::string& file_name) const {
+    if (exefs_id == boost::none)
+        return 0;
+    return pfs[*exefs_id].GetFileSize(file_name);
+}
+
+u64 Nca::GetRomFsOffset() const {
+    return romfs_offset;
+}
+
+u64 Nca::GetRomFsSize() const {
+    return romfs_size;
+}
+
+std::vector<u8> Nca::GetExeFsFile(const std::string& file_name) {
+    std::vector<u8> out(GetExeFsFileSize(file_name));
+    file.Seek(GetExeFsFileOffset(file_name), SEEK_SET);
+    file.ReadBytes(out.data(), GetExeFsFileSize(file_name));
+    return out;
+}
+
+AppLoader_NCA::AppLoader_NCA(FileUtil::IOFile&& file, std::string filepath)
+    : AppLoader(std::move(file)), filepath(std::move(filepath)) {}
+
+FileType AppLoader_NCA::IdentifyType(FileUtil::IOFile& file, const std::string&) {
+    file.Seek(0, SEEK_SET);
+    std::array<u8, 0x400> header_enc_array{};
+    if (0x400 != file.ReadBytes(header_enc_array.data(), 0x400))
         return FileType::Error;
 
-    if (IsValidNCA(header) && header.content_type == FileSys::NCAContentType::Program)
+    // TODO(DarkLordZach): Assuming everything is decrypted. Add crypto support.
+    NcaHeader header{};
+    std::memcpy(&header, header_enc_array.data(), sizeof(NcaHeader));
+
+    if (IsValidNca(header) && header.content_type == NcaContentType::Program)
         return FileType::NCA;
 
     return FileType::Error;
@@ -36,22 +231,17 @@ ResultStatus AppLoader_NCA::Load(Kernel::SharedPtr<Kernel::Process>& process) {
     if (is_loaded) {
         return ResultStatus::ErrorAlreadyLoaded;
     }
+    if (!file.IsOpen()) {
+        return ResultStatus::Error;
+    }
 
-    nca = std::make_unique<FileSys::NCA>(file);
-    ResultStatus result = nca->GetStatus();
+    nca = std::make_unique<Nca>();
+    ResultStatus result = nca->Load(std::move(file), filepath);
     if (result != ResultStatus::Success) {
         return result;
     }
 
-    if (nca->GetType() != FileSys::NCAContentType::Program)
-        return ResultStatus::ErrorInvalidFormat;
-
-    auto exefs = nca->GetExeFS();
-
-    if (exefs == nullptr)
-        return ResultStatus::ErrorInvalidFormat;
-
-    result = metadata.Load(exefs->GetFile("main.npdm"));
+    result = metadata.Load(nca->GetExeFsFile("main.npdm"));
     if (result != ResultStatus::Success) {
         return result;
     }
@@ -66,8 +256,7 @@ ResultStatus AppLoader_NCA::Load(Kernel::SharedPtr<Kernel::Process>& process) {
     for (const auto& module : {"rtld", "main", "subsdk0", "subsdk1", "subsdk2", "subsdk3",
                                "subsdk4", "subsdk5", "subsdk6", "subsdk7", "sdk"}) {
         const VAddr load_addr = next_load_addr;
-
-        next_load_addr = AppLoader_NSO::LoadModule(exefs->GetFile(module), load_addr);
+        next_load_addr = AppLoader_NSO::LoadModule(module, nca->GetExeFsFile(module), load_addr);
         if (next_load_addr) {
             LOG_DEBUG(Loader, "loaded module {} @ 0x{:X}", module, load_addr);
         } else {
@@ -83,11 +272,28 @@ ResultStatus AppLoader_NCA::Load(Kernel::SharedPtr<Kernel::Process>& process) {
     process->Run(Memory::PROCESS_IMAGE_VADDR, metadata.GetMainThreadPriority(),
                  metadata.GetMainThreadStackSize());
 
+    if (nca->GetRomFsSize() > 0)
+        Service::FileSystem::RegisterFileSystem(std::make_unique<FileSys::RomFS_Factory>(*this),
+                                                Service::FileSystem::Type::RomFS);
+
     is_loaded = true;
+    return ResultStatus::Success;
+}
+
+ResultStatus AppLoader_NCA::ReadRomFS(std::shared_ptr<FileUtil::IOFile>& romfs_file, u64& offset,
+                                      u64& size) {
+    if (nca->GetRomFsSize() == 0) {
+        LOG_DEBUG(Loader, "No RomFS available");
+        return ResultStatus::ErrorNotUsed;
+    }
+
+    romfs_file = std::make_shared<FileUtil::IOFile>(filepath, "rb");
+
+    offset = nca->GetRomFsOffset();
+    size = nca->GetRomFsSize();
 
-    const auto romfs = nca->GetRomFS();
-    if (romfs != nullptr)
-        Service::FileSystem::RegisterRomFS(romfs);
+    LOG_DEBUG(Loader, "RomFS offset:           0x{:016X}", offset);
+    LOG_DEBUG(Loader, "RomFS size:             0x{:016X}", size);
 
     return ResultStatus::Success;
 }
diff --git a/src/core/loader/nca.h b/src/core/loader/nca.h
index a5639f149..3b6c451d0 100644
--- a/src/core/loader/nca.h
+++ b/src/core/loader/nca.h
@@ -6,37 +6,44 @@
 
 #include <string>
 #include "common/common_types.h"
-#include "core/file_sys/content_archive.h"
+#include "core/file_sys/partition_filesystem.h"
 #include "core/file_sys/program_metadata.h"
 #include "core/hle/kernel/kernel.h"
 #include "core/loader/loader.h"
 
 namespace Loader {
 
+class Nca;
+
 /// Loads an NCA file
 class AppLoader_NCA final : public AppLoader {
 public:
-    explicit AppLoader_NCA(FileSys::VirtualFile file);
+    AppLoader_NCA(FileUtil::IOFile&& file, std::string filepath);
 
     /**
      * Returns the type of the file
-     * @param file std::shared_ptr<VfsFile> open file
+     * @param file FileUtil::IOFile open file
+     * @param filepath Path of the file that we are opening.
      * @return FileType found, or FileType::Error if this loader doesn't know it
      */
-    static FileType IdentifyType(const FileSys::VirtualFile& file);
+    static FileType IdentifyType(FileUtil::IOFile& file, const std::string& filepath);
 
     FileType GetFileType() override {
-        return IdentifyType(file);
+        return IdentifyType(file, filepath);
     }
 
     ResultStatus Load(Kernel::SharedPtr<Kernel::Process>& process) override;
 
+    ResultStatus ReadRomFS(std::shared_ptr<FileUtil::IOFile>& romfs_file, u64& offset,
+                           u64& size) override;
+
     ~AppLoader_NCA();
 
 private:
+    std::string filepath;
     FileSys::ProgramMetadata metadata;
 
-    std::unique_ptr<FileSys::NCA> nca;
+    std::unique_ptr<Nca> nca;
 };
 
 } // namespace Loader
diff --git a/src/core/loader/nro.cpp b/src/core/loader/nro.cpp
index 08b7aad7a..3853cfa1a 100644
--- a/src/core/loader/nro.cpp
+++ b/src/core/loader/nro.cpp
@@ -47,12 +47,14 @@ struct ModHeader {
 };
 static_assert(sizeof(ModHeader) == 0x1c, "ModHeader has incorrect size.");
 
-AppLoader_NRO::AppLoader_NRO(FileSys::VirtualFile file) : AppLoader(file) {}
+AppLoader_NRO::AppLoader_NRO(FileUtil::IOFile&& file, std::string filepath)
+    : AppLoader(std::move(file)), filepath(std::move(filepath)) {}
 
-FileType AppLoader_NRO::IdentifyType(const FileSys::VirtualFile& file) {
+FileType AppLoader_NRO::IdentifyType(FileUtil::IOFile& file, const std::string&) {
     // Read NSO header
     NroHeader nro_header{};
-    if (sizeof(NroHeader) != file->ReadObject(&nro_header)) {
+    file.Seek(0, SEEK_SET);
+    if (sizeof(NroHeader) != file.ReadBytes(&nro_header, sizeof(NroHeader))) {
         return FileType::Error;
     }
     if (nro_header.magic == Common::MakeMagic('N', 'R', 'O', '0')) {
@@ -65,10 +67,16 @@ static constexpr u32 PageAlignSize(u32 size) {
     return (size + Memory::PAGE_MASK) & ~Memory::PAGE_MASK;
 }
 
-bool AppLoader_NRO::LoadNro(FileSys::VirtualFile file, VAddr load_base) {
+bool AppLoader_NRO::LoadNro(const std::string& path, VAddr load_base) {
+    FileUtil::IOFile file(path, "rb");
+    if (!file.IsOpen()) {
+        return {};
+    }
+
     // Read NSO header
     NroHeader nro_header{};
-    if (sizeof(NroHeader) != file->ReadObject(&nro_header)) {
+    file.Seek(0, SEEK_SET);
+    if (sizeof(NroHeader) != file.ReadBytes(&nro_header, sizeof(NroHeader))) {
         return {};
     }
     if (nro_header.magic != Common::MakeMagic('N', 'R', 'O', '0')) {
@@ -77,9 +85,10 @@ bool AppLoader_NRO::LoadNro(FileSys::VirtualFile file, VAddr load_base) {
 
     // Build program image
     Kernel::SharedPtr<Kernel::CodeSet> codeset = Kernel::CodeSet::Create("");
-    std::vector<u8> program_image = file->ReadBytes(PageAlignSize(nro_header.file_size));
-    if (program_image.size() != PageAlignSize(nro_header.file_size))
-        return {};
+    std::vector<u8> program_image;
+    program_image.resize(PageAlignSize(nro_header.file_size));
+    file.Seek(0, SEEK_SET);
+    file.ReadBytes(program_image.data(), nro_header.file_size);
 
     for (int i = 0; i < nro_header.segments.size(); ++i) {
         codeset->segments[i].addr = nro_header.segments[i].offset;
@@ -102,7 +111,7 @@ bool AppLoader_NRO::LoadNro(FileSys::VirtualFile file, VAddr load_base) {
     program_image.resize(static_cast<u32>(program_image.size()) + bss_size);
 
     // Load codeset for current process
-    codeset->name = file->GetName();
+    codeset->name = path;
     codeset->memory = std::make_shared<std::vector<u8>>(std::move(program_image));
     Core::CurrentProcess()->LoadModule(codeset, load_base);
 
@@ -113,11 +122,14 @@ ResultStatus AppLoader_NRO::Load(Kernel::SharedPtr<Kernel::Process>& process) {
     if (is_loaded) {
         return ResultStatus::ErrorAlreadyLoaded;
     }
+    if (!file.IsOpen()) {
+        return ResultStatus::Error;
+    }
 
     // Load NRO
     static constexpr VAddr base_addr{Memory::PROCESS_IMAGE_VADDR};
 
-    if (!LoadNro(file, base_addr)) {
+    if (!LoadNro(filepath, base_addr)) {
         return ResultStatus::ErrorInvalidFormat;
     }
 
diff --git a/src/core/loader/nro.h b/src/core/loader/nro.h
index 2c03d06bb..599adb253 100644
--- a/src/core/loader/nro.h
+++ b/src/core/loader/nro.h
@@ -15,23 +15,26 @@ namespace Loader {
 /// Loads an NRO file
 class AppLoader_NRO final : public AppLoader, Linker {
 public:
-    AppLoader_NRO(FileSys::VirtualFile file);
+    AppLoader_NRO(FileUtil::IOFile&& file, std::string filepath);
 
     /**
      * Returns the type of the file
-     * @param file std::shared_ptr<VfsFile> open file
+     * @param file FileUtil::IOFile open file
+     * @param filepath Path of the file that we are opening.
      * @return FileType found, or FileType::Error if this loader doesn't know it
      */
-    static FileType IdentifyType(const FileSys::VirtualFile& file);
+    static FileType IdentifyType(FileUtil::IOFile& file, const std::string& filepath);
 
     FileType GetFileType() override {
-        return IdentifyType(file);
+        return IdentifyType(file, filepath);
     }
 
     ResultStatus Load(Kernel::SharedPtr<Kernel::Process>& process) override;
 
 private:
-    bool LoadNro(FileSys::VirtualFile file, VAddr load_base);
+    bool LoadNro(const std::string& path, VAddr load_base);
+
+    std::string filepath;
 };
 
 } // namespace Loader
diff --git a/src/core/loader/nso.cpp b/src/core/loader/nso.cpp
index 2ed12a5ab..7f84e4b1b 100644
--- a/src/core/loader/nso.cpp
+++ b/src/core/loader/nso.cpp
@@ -37,7 +37,6 @@ struct NsoHeader {
     std::array<u32_le, 3> segments_compressed_size;
 };
 static_assert(sizeof(NsoHeader) == 0x6c, "NsoHeader has incorrect size.");
-static_assert(std::is_trivially_copyable_v<NsoHeader>, "NsoHeader isn't trivially copyable.");
 
 struct ModHeader {
     u32_le magic;
@@ -50,11 +49,15 @@ struct ModHeader {
 };
 static_assert(sizeof(ModHeader) == 0x1c, "ModHeader has incorrect size.");
 
-AppLoader_NSO::AppLoader_NSO(FileSys::VirtualFile file) : AppLoader(std::move(file)) {}
+AppLoader_NSO::AppLoader_NSO(FileUtil::IOFile&& file, std::string filepath)
+    : AppLoader(std::move(file)), filepath(std::move(filepath)) {}
 
-FileType AppLoader_NSO::IdentifyType(const FileSys::VirtualFile& file) {
+FileType AppLoader_NSO::IdentifyType(FileUtil::IOFile& file, const std::string&) {
     u32 magic = 0;
-    file->ReadObject(&magic);
+    file.Seek(0, SEEK_SET);
+    if (1 != file.ReadArray<u32>(&magic, 1)) {
+        return FileType::Error;
+    }
 
     if (Common::MakeMagic('N', 'S', 'O', '0') == magic) {
         return FileType::NSO;
@@ -95,27 +98,80 @@ static constexpr u32 PageAlignSize(u32 size) {
     return (size + Memory::PAGE_MASK) & ~Memory::PAGE_MASK;
 }
 
-VAddr AppLoader_NSO::LoadModule(FileSys::VirtualFile file, VAddr load_base) {
-    if (file == nullptr)
+VAddr AppLoader_NSO::LoadModule(const std::string& name, const std::vector<u8>& file_data,
+                                VAddr load_base) {
+    if (file_data.size() < sizeof(NsoHeader))
         return {};
 
-    if (file->GetSize() < sizeof(NsoHeader))
+    NsoHeader nso_header;
+    std::memcpy(&nso_header, file_data.data(), sizeof(NsoHeader));
+
+    if (nso_header.magic != Common::MakeMagic('N', 'S', 'O', '0'))
         return {};
 
-    NsoHeader nso_header{};
-    if (sizeof(NsoHeader) != file->ReadObject(&nso_header))
+    // Build program image
+    Kernel::SharedPtr<Kernel::CodeSet> codeset = Kernel::CodeSet::Create("");
+    std::vector<u8> program_image;
+    for (int i = 0; i < nso_header.segments.size(); ++i) {
+        std::vector<u8> compressed_data(nso_header.segments_compressed_size[i]);
+        for (int j = 0; j < nso_header.segments_compressed_size[i]; ++j)
+            compressed_data[j] = file_data[nso_header.segments[i].offset + j];
+        std::vector<u8> data = DecompressSegment(compressed_data, nso_header.segments[i]);
+        program_image.resize(nso_header.segments[i].location);
+        program_image.insert(program_image.end(), data.begin(), data.end());
+        codeset->segments[i].addr = nso_header.segments[i].location;
+        codeset->segments[i].offset = nso_header.segments[i].location;
+        codeset->segments[i].size = PageAlignSize(static_cast<u32>(data.size()));
+    }
+
+    // MOD header pointer is at .text offset + 4
+    u32 module_offset;
+    std::memcpy(&module_offset, program_image.data() + 4, sizeof(u32));
+
+    // Read MOD header
+    ModHeader mod_header{};
+    // Default .bss to size in segment header if MOD0 section doesn't exist
+    u32 bss_size{PageAlignSize(nso_header.segments[2].bss_size)};
+    std::memcpy(&mod_header, program_image.data() + module_offset, sizeof(ModHeader));
+    const bool has_mod_header{mod_header.magic == Common::MakeMagic('M', 'O', 'D', '0')};
+    if (has_mod_header) {
+        // Resize program image to include .bss section and page align each section
+        bss_size = PageAlignSize(mod_header.bss_end_offset - mod_header.bss_start_offset);
+    }
+    codeset->data.size += bss_size;
+    const u32 image_size{PageAlignSize(static_cast<u32>(program_image.size()) + bss_size)};
+    program_image.resize(image_size);
+
+    // Load codeset for current process
+    codeset->name = name;
+    codeset->memory = std::make_shared<std::vector<u8>>(std::move(program_image));
+    Core::CurrentProcess()->LoadModule(codeset, load_base);
+
+    return load_base + image_size;
+}
+
+VAddr AppLoader_NSO::LoadModule(const std::string& path, VAddr load_base) {
+    FileUtil::IOFile file(path, "rb");
+    if (!file.IsOpen()) {
         return {};
+    }
 
-    if (nso_header.magic != Common::MakeMagic('N', 'S', 'O', '0'))
+    // Read NSO header
+    NsoHeader nso_header{};
+    file.Seek(0, SEEK_SET);
+    if (sizeof(NsoHeader) != file.ReadBytes(&nso_header, sizeof(NsoHeader))) {
+        return {};
+    }
+    if (nso_header.magic != Common::MakeMagic('N', 'S', 'O', '0')) {
         return {};
+    }
 
     // Build program image
     Kernel::SharedPtr<Kernel::CodeSet> codeset = Kernel::CodeSet::Create("");
     std::vector<u8> program_image;
     for (int i = 0; i < nso_header.segments.size(); ++i) {
-        const std::vector<u8> compressed_data =
-            file->ReadBytes(nso_header.segments_compressed_size[i], nso_header.segments[i].offset);
-        std::vector<u8> data = DecompressSegment(compressed_data, nso_header.segments[i]);
+        std::vector<u8> data =
+            ReadSegment(file, nso_header.segments[i], nso_header.segments_compressed_size[i]);
         program_image.resize(nso_header.segments[i].location);
         program_image.insert(program_image.end(), data.begin(), data.end());
         codeset->segments[i].addr = nso_header.segments[i].location;
@@ -142,7 +198,7 @@ VAddr AppLoader_NSO::LoadModule(FileSys::VirtualFile file, VAddr load_base) {
     program_image.resize(image_size);
 
     // Load codeset for current process
-    codeset->name = file->GetName();
+    codeset->name = path;
     codeset->memory = std::make_shared<std::vector<u8>>(std::move(program_image));
     Core::CurrentProcess()->LoadModule(codeset, load_base);
 
@@ -153,10 +209,13 @@ ResultStatus AppLoader_NSO::Load(Kernel::SharedPtr<Kernel::Process>& process) {
     if (is_loaded) {
         return ResultStatus::ErrorAlreadyLoaded;
     }
+    if (!file.IsOpen()) {
+        return ResultStatus::Error;
+    }
 
     // Load module
-    LoadModule(file, Memory::PROCESS_IMAGE_VADDR);
-    LOG_DEBUG(Loader, "loaded module {} @ 0x{:X}", file->GetName(), Memory::PROCESS_IMAGE_VADDR);
+    LoadModule(filepath, Memory::PROCESS_IMAGE_VADDR);
+    LOG_DEBUG(Loader, "loaded module {} @ 0x{:X}", filepath, Memory::PROCESS_IMAGE_VADDR);
 
     process->svc_access_mask.set();
     process->address_mappings = default_address_mappings;
diff --git a/src/core/loader/nso.h b/src/core/loader/nso.h
index 3f7567500..386f4d39a 100644
--- a/src/core/loader/nso.h
+++ b/src/core/loader/nso.h
@@ -15,22 +15,29 @@ namespace Loader {
 /// Loads an NSO file
 class AppLoader_NSO final : public AppLoader, Linker {
 public:
-    explicit AppLoader_NSO(FileSys::VirtualFile file);
+    AppLoader_NSO(FileUtil::IOFile&& file, std::string filepath);
 
     /**
      * Returns the type of the file
-     * @param file std::shared_ptr<VfsFile> open file
+     * @param file FileUtil::IOFile open file
+     * @param filepath Path of the file that we are opening.
      * @return FileType found, or FileType::Error if this loader doesn't know it
      */
-    static FileType IdentifyType(const FileSys::VirtualFile& file);
+    static FileType IdentifyType(FileUtil::IOFile& file, const std::string& filepath);
 
     FileType GetFileType() override {
-        return IdentifyType(file);
+        return IdentifyType(file, filepath);
     }
 
-    static VAddr LoadModule(FileSys::VirtualFile file, VAddr load_base);
+    static VAddr LoadModule(const std::string& name, const std::vector<u8>& file_data,
+                            VAddr load_base);
+
+    static VAddr LoadModule(const std::string& path, VAddr load_base);
 
     ResultStatus Load(Kernel::SharedPtr<Kernel::Process>& process) override;
+
+private:
+    std::string filepath;
 };
 
 } // namespace Loader