8 files changed, 63 insertions, 53 deletions

diff --git a/src/core/loader/3dsx.cpp b/src/core/loader/3dsx.cpp
index 055661363..d043fa9bd 100644
--- a/src/core/loader/3dsx.cpp
+++ b/src/core/loader/3dsx.cpp
@@ -246,11 +246,11 @@ ResultStatus AppLoader_THREEDSX::Load() {
     if (is_loaded)
         return ResultStatus::ErrorAlreadyLoaded;
 
-    if (!file->IsOpen())
+    if (!file.IsOpen())
         return ResultStatus::Error;
 
     SharedPtr<CodeSet> codeset;
-    if (Load3DSXFile(*file, Memory::PROCESS_IMAGE_VADDR, &codeset) != ERROR_NONE)
+    if (Load3DSXFile(file, Memory::PROCESS_IMAGE_VADDR, &codeset) != ERROR_NONE)
         return ResultStatus::Error;
     codeset->name = filename;
 
diff --git a/src/core/loader/3dsx.h b/src/core/loader/3dsx.h
index 096b3ec20..a0aa0c533 100644
--- a/src/core/loader/3dsx.h
+++ b/src/core/loader/3dsx.h
@@ -17,7 +17,7 @@ namespace Loader {
 /// Loads an 3DSX file
 class AppLoader_THREEDSX final : public AppLoader {
 public:
-    AppLoader_THREEDSX(std::unique_ptr<FileUtil::IOFile>&& file, std::string filename)
+    AppLoader_THREEDSX(FileUtil::IOFile&& file, std::string filename)
         : AppLoader(std::move(file)), filename(std::move(filename)) {}
 
     /**
diff --git a/src/core/loader/elf.cpp b/src/core/loader/elf.cpp
index ca3c18a9f..5d7264f12 100644
--- a/src/core/loader/elf.cpp
+++ b/src/core/loader/elf.cpp
@@ -273,7 +273,6 @@ SharedPtr<CodeSet> ElfReader::LoadInto(u32 vaddr) {
     LOG_DEBUG(Loader, "%i segments:", header->e_phnum);
 
     // First pass : Get the bits into RAM
-    u32 segment_addr[32];
     u32 base_addr = relocate ? vaddr : 0;
 
     u32 total_image_size = 0;
@@ -392,15 +391,15 @@ ResultStatus AppLoader_ELF::Load() {
     if (is_loaded)
         return ResultStatus::ErrorAlreadyLoaded;
 
-    if (!file->IsOpen())
+    if (!file.IsOpen())
         return ResultStatus::Error;
 
     // Reset read pointer in case this file has been read before.
-    file->Seek(0, SEEK_SET);
+    file.Seek(0, SEEK_SET);
 
-    u32 size = static_cast<u32>(file->GetSize());
+    size_t size = file.GetSize();
     std::unique_ptr<u8[]> buffer(new u8[size]);
-    if (file->ReadBytes(&buffer[0], size) != size)
+    if (file.ReadBytes(&buffer[0], size) != size)
         return ResultStatus::Error;
 
     ElfReader elf_reader(&buffer[0]);
diff --git a/src/core/loader/elf.h b/src/core/loader/elf.h
index 32841606a..c6a5ebe99 100644
--- a/src/core/loader/elf.h
+++ b/src/core/loader/elf.h
@@ -17,7 +17,7 @@ namespace Loader {
 /// Loads an ELF/AXF file
 class AppLoader_ELF final : public AppLoader {
 public:
-    AppLoader_ELF(std::unique_ptr<FileUtil::IOFile>&& file, std::string filename)
+    AppLoader_ELF(FileUtil::IOFile&& file, std::string filename)
         : AppLoader(std::move(file)), filename(std::move(filename)) { }
 
     /**
diff --git a/src/core/loader/loader.cpp b/src/core/loader/loader.cpp
index 2e450fce4..9ef2f8900 100644
--- a/src/core/loader/loader.cpp
+++ b/src/core/loader/loader.cpp
@@ -90,8 +90,8 @@ static const char* GetFileTypeString(FileType type) {
 }
 
 ResultStatus LoadFile(const std::string& filename) {
-    std::unique_ptr<FileUtil::IOFile> file(new FileUtil::IOFile(filename, "rb"));
-    if (!file->IsOpen()) {
+    FileUtil::IOFile file(filename, "rb");
+    if (!file.IsOpen()) {
         LOG_ERROR(Loader, "Failed to load file %s", filename.c_str());
         return ResultStatus::Error;
     }
@@ -99,7 +99,7 @@ ResultStatus LoadFile(const std::string& filename) {
     std::string filename_filename, filename_extension;
     Common::SplitPath(filename, nullptr, &filename_filename, &filename_extension);
 
-    FileType type = IdentifyFile(*file);
+    FileType type = IdentifyFile(file);
     FileType filename_type = GuessFromExtension(filename_extension);
 
     if (type != filename_type) {
@@ -124,7 +124,7 @@ ResultStatus LoadFile(const std::string& filename) {
     case FileType::CXI:
     case FileType::CCI:
     {
-        AppLoader_NCCH app_loader(std::move(file));
+        AppLoader_NCCH app_loader(std::move(file), filename);
 
         // Load application and RomFS
         if (ResultStatus::Success == app_loader.Load()) {
diff --git a/src/core/loader/loader.h b/src/core/loader/loader.h
index 52bbf35b8..a37d3348c 100644
--- a/src/core/loader/loader.h
+++ b/src/core/loader/loader.h
@@ -52,7 +52,7 @@ static inline u32 MakeMagic(char a, char b, char c, char d) {
 /// Interface for loading an application
 class AppLoader : NonCopyable {
 public:
-    AppLoader(std::unique_ptr<FileUtil::IOFile>&& file) : file(std::move(file)) { }
+    AppLoader(FileUtil::IOFile&& file) : file(std::move(file)) { }
     virtual ~AppLoader() { }
 
     /**
@@ -66,7 +66,7 @@ public:
      * @param buffer Reference to buffer to store data
      * @return ResultStatus result of function
      */
-    virtual ResultStatus ReadCode(std::vector<u8>& buffer) const {
+    virtual ResultStatus ReadCode(std::vector<u8>& buffer) {
         return ResultStatus::ErrorNotImplemented;
     }
 
@@ -75,7 +75,7 @@ public:
      * @param buffer Reference to buffer to store data
      * @return ResultStatus result of function
      */
-    virtual ResultStatus ReadIcon(std::vector<u8>& buffer) const {
+    virtual ResultStatus ReadIcon(std::vector<u8>& buffer) {
         return ResultStatus::ErrorNotImplemented;
     }
 
@@ -84,7 +84,7 @@ public:
      * @param buffer Reference to buffer to store data
      * @return ResultStatus result of function
      */
-    virtual ResultStatus ReadBanner(std::vector<u8>& buffer) const {
+    virtual ResultStatus ReadBanner(std::vector<u8>& buffer) {
         return ResultStatus::ErrorNotImplemented;
     }
 
@@ -93,22 +93,25 @@ public:
      * @param buffer Reference to buffer to store data
      * @return ResultStatus result of function
      */
-    virtual ResultStatus ReadLogo(std::vector<u8>& buffer) const {
+    virtual ResultStatus ReadLogo(std::vector<u8>& buffer) {
         return ResultStatus::ErrorNotImplemented;
     }
 
     /**
      * Get the RomFS of the application
-     * @param buffer Reference to buffer to store data
+     * Since the RomFS can be huge, we return a file reference instead of copying to a buffer
+     * @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(std::vector<u8>& buffer) const {
+    virtual ResultStatus ReadRomFS(std::shared_ptr<FileUtil::IOFile>& romfs_file, u64& offset, u64& size) {
         return ResultStatus::ErrorNotImplemented;
     }
 
 protected:
-    std::unique_ptr<FileUtil::IOFile> file;
-    bool                              is_loaded = false;
+    FileUtil::IOFile file;
+    bool is_loaded = false;
 };
 
 /**
diff --git a/src/core/loader/ncch.cpp b/src/core/loader/ncch.cpp
index 87603d198..094d74100 100644
--- a/src/core/loader/ncch.cpp
+++ b/src/core/loader/ncch.cpp
@@ -117,7 +117,7 @@ FileType AppLoader_NCCH::IdentifyType(FileUtil::IOFile& file) {
     return FileType::Error;
 }
 
-ResultStatus AppLoader_NCCH::LoadExec() const {
+ResultStatus AppLoader_NCCH::LoadExec() {
     using Kernel::SharedPtr;
     using Kernel::CodeSet;
 
@@ -171,8 +171,8 @@ ResultStatus AppLoader_NCCH::LoadExec() const {
     return ResultStatus::Error;
 }
 
-ResultStatus AppLoader_NCCH::LoadSectionExeFS(const char* name, std::vector<u8>& buffer) const {
-    if (!file->IsOpen())
+ResultStatus AppLoader_NCCH::LoadSectionExeFS(const char* name, std::vector<u8>& buffer) {
+    if (!file.IsOpen())
         return ResultStatus::Error;
 
     LOG_DEBUG(Loader, "%d sections:", kMaxSections);
@@ -186,7 +186,7 @@ ResultStatus AppLoader_NCCH::LoadSectionExeFS(const char* name, std::vector<u8>&
                       section.offset, section.size, section.name);
 
             s64 section_offset = (section.offset + exefs_offset + sizeof(ExeFs_Header) + ncch_offset);
-            file->Seek(section_offset, SEEK_SET);
+            file.Seek(section_offset, SEEK_SET);
 
             if (is_compressed) {
                 // Section is compressed, read compressed .code section...
@@ -197,7 +197,7 @@ ResultStatus AppLoader_NCCH::LoadSectionExeFS(const char* name, std::vector<u8>&
                     return ResultStatus::ErrorMemoryAllocationFailed;
                 }
 
-                if (file->ReadBytes(&temp_buffer[0], section.size) != section.size)
+                if (file.ReadBytes(&temp_buffer[0], section.size) != section.size)
                     return ResultStatus::Error;
 
                 // Decompress .code section...
@@ -208,7 +208,7 @@ ResultStatus AppLoader_NCCH::LoadSectionExeFS(const char* name, std::vector<u8>&
             } else {
                 // Section is uncompressed...
                 buffer.resize(section.size);
-                if (file->ReadBytes(&buffer[0], section.size) != section.size)
+                if (file.ReadBytes(&buffer[0], section.size) != section.size)
                     return ResultStatus::Error;
             }
             return ResultStatus::Success;
@@ -221,21 +221,21 @@ ResultStatus AppLoader_NCCH::Load() {
     if (is_loaded)
         return ResultStatus::ErrorAlreadyLoaded;
 
-    if (!file->IsOpen())
+    if (!file.IsOpen())
         return ResultStatus::Error;
 
     // Reset read pointer in case this file has been read before.
-    file->Seek(0, SEEK_SET);
+    file.Seek(0, SEEK_SET);
 
-    if (file->ReadBytes(&ncch_header, sizeof(NCCH_Header)) != sizeof(NCCH_Header))
+    if (file.ReadBytes(&ncch_header, sizeof(NCCH_Header)) != sizeof(NCCH_Header))
         return ResultStatus::Error;
 
     // Skip NCSD header and load first NCCH (NCSD is just a container of NCCH files)...
     if (MakeMagic('N', 'C', 'S', 'D') == ncch_header.magic) {
         LOG_WARNING(Loader, "Only loading the first (bootable) NCCH within the NCSD file!");
         ncch_offset = 0x4000;
-        file->Seek(ncch_offset, SEEK_SET);
-        file->ReadBytes(&ncch_header, sizeof(NCCH_Header));
+        file.Seek(ncch_offset, SEEK_SET);
+        file.ReadBytes(&ncch_header, sizeof(NCCH_Header));
     }
 
     // Verify we are loading the correct file type...
@@ -244,7 +244,7 @@ ResultStatus AppLoader_NCCH::Load() {
 
     // Read ExHeader...
 
-    if (file->ReadBytes(&exheader_header, sizeof(ExHeader_Header)) != sizeof(ExHeader_Header))
+    if (file.ReadBytes(&exheader_header, sizeof(ExHeader_Header)) != sizeof(ExHeader_Header))
         return ResultStatus::Error;
 
     is_compressed           = (exheader_header.codeset_info.flags.flag & 1) == 1;
@@ -274,8 +274,8 @@ ResultStatus AppLoader_NCCH::Load() {
     LOG_DEBUG(Loader, "ExeFS offset:                0x%08X", exefs_offset);
     LOG_DEBUG(Loader, "ExeFS size:                  0x%08X", exefs_size);
 
-    file->Seek(exefs_offset + ncch_offset, SEEK_SET);
-    if (file->ReadBytes(&exefs_header, sizeof(ExeFs_Header)) != sizeof(ExeFs_Header))
+    file.Seek(exefs_offset + ncch_offset, SEEK_SET);
+    if (file.ReadBytes(&exefs_header, sizeof(ExeFs_Header)) != sizeof(ExeFs_Header))
         return ResultStatus::Error;
 
     is_loaded = true; // Set state to loaded
@@ -283,24 +283,24 @@ ResultStatus AppLoader_NCCH::Load() {
     return LoadExec(); // Load the executable into memory for booting
 }
 
-ResultStatus AppLoader_NCCH::ReadCode(std::vector<u8>& buffer) const {
+ResultStatus AppLoader_NCCH::ReadCode(std::vector<u8>& buffer) {
     return LoadSectionExeFS(".code", buffer);
 }
 
-ResultStatus AppLoader_NCCH::ReadIcon(std::vector<u8>& buffer) const {
+ResultStatus AppLoader_NCCH::ReadIcon(std::vector<u8>& buffer) {
     return LoadSectionExeFS("icon", buffer);
 }
 
-ResultStatus AppLoader_NCCH::ReadBanner(std::vector<u8>& buffer) const {
+ResultStatus AppLoader_NCCH::ReadBanner(std::vector<u8>& buffer) {
     return LoadSectionExeFS("banner", buffer);
 }
 
-ResultStatus AppLoader_NCCH::ReadLogo(std::vector<u8>& buffer) const {
+ResultStatus AppLoader_NCCH::ReadLogo(std::vector<u8>& buffer) {
     return LoadSectionExeFS("logo", buffer);
 }
 
-ResultStatus AppLoader_NCCH::ReadRomFS(std::vector<u8>& buffer) const {
-    if (!file->IsOpen())
+ResultStatus AppLoader_NCCH::ReadRomFS(std::shared_ptr<FileUtil::IOFile>& romfs_file, u64& offset, u64& size) {
+    if (!file.IsOpen())
         return ResultStatus::Error;
 
     // Check if the NCCH has a RomFS...
@@ -311,12 +311,17 @@ ResultStatus AppLoader_NCCH::ReadRomFS(std::vector<u8>& buffer) const {
         LOG_DEBUG(Loader, "RomFS offset:           0x%08X", romfs_offset);
         LOG_DEBUG(Loader, "RomFS size:             0x%08X", romfs_size);
 
-        buffer.resize(romfs_size);
+        if (file.GetSize () < romfs_offset + romfs_size)
+            return ResultStatus::Error;
 
-        file->Seek(romfs_offset, SEEK_SET);
-        if (file->ReadBytes(&buffer[0], romfs_size) != romfs_size)
+        // We reopen the file, to allow its position to be independent from file's
+        romfs_file = std::make_shared<FileUtil::IOFile>(filepath, "rb");
+        if (!romfs_file->IsOpen())
             return ResultStatus::Error;
 
+        offset = romfs_offset;
+        size = romfs_size;
+
         return ResultStatus::Success;
     }
     LOG_DEBUG(Loader, "NCCH has no RomFS");
diff --git a/src/core/loader/ncch.h b/src/core/loader/ncch.h
index 29e39d2c0..b4374a476 100644
--- a/src/core/loader/ncch.h
+++ b/src/core/loader/ncch.h
@@ -163,7 +163,8 @@ namespace Loader {
 /// Loads an NCCH file (e.g. from a CCI, or the first NCCH in a CXI)
 class AppLoader_NCCH final : public AppLoader {
 public:
-    AppLoader_NCCH(std::unique_ptr<FileUtil::IOFile>&& file) : AppLoader(std::move(file)) { }
+    AppLoader_NCCH(FileUtil::IOFile&& file, const std::string& filepath)
+        : AppLoader(std::move(file)), filepath(filepath) { }
 
     /**
      * Returns the type of the file
@@ -183,35 +184,35 @@ public:
      * @param buffer Reference to buffer to store data
      * @return ResultStatus result of function
      */
-    ResultStatus ReadCode(std::vector<u8>& buffer) const override;
+    ResultStatus ReadCode(std::vector<u8>& buffer) override;
 
     /**
      * Get the icon (typically icon section) of the application
      * @param buffer Reference to buffer to store data
      * @return ResultStatus result of function
      */
-    ResultStatus ReadIcon(std::vector<u8>& buffer) const override;
+    ResultStatus ReadIcon(std::vector<u8>& buffer) override;
 
     /**
      * Get the banner (typically banner section) of the application
      * @param buffer Reference to buffer to store data
      * @return ResultStatus result of function
      */
-    ResultStatus ReadBanner(std::vector<u8>& buffer) const override;
+    ResultStatus ReadBanner(std::vector<u8>& buffer) override;
 
     /**
      * Get the logo (typically logo section) of the application
      * @param buffer Reference to buffer to store data
      * @return ResultStatus result of function
      */
-    ResultStatus ReadLogo(std::vector<u8>& buffer) const override;
+    ResultStatus ReadLogo(std::vector<u8>& buffer) override;
 
     /**
      * Get the RomFS of the application
      * @param buffer Reference to buffer to store data
      * @return ResultStatus result of function
      */
-    ResultStatus ReadRomFS(std::vector<u8>& buffer) const override;
+    ResultStatus ReadRomFS(std::shared_ptr<FileUtil::IOFile>& romfs_file, u64& offset, u64& size) override;
 
 private:
 
@@ -221,13 +222,13 @@ private:
      * @param buffer Vector to read data into
      * @return ResultStatus result of function
      */
-    ResultStatus LoadSectionExeFS(const char* name, std::vector<u8>& buffer) const;
+    ResultStatus LoadSectionExeFS(const char* name, std::vector<u8>& buffer);
 
     /**
      * Loads .code section into memory for booting
      * @return ResultStatus result of function
      */
-    ResultStatus LoadExec() const;
+    ResultStatus LoadExec();
 
     bool            is_compressed = false;
 
@@ -244,6 +245,8 @@ private:
     NCCH_Header     ncch_header;
     ExeFs_Header    exefs_header;
     ExHeader_Header exheader_header;
+
+    std::string     filepath;
 };
 
 } // namespace Loader