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Implement 3dsx RomFS
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@ -62,6 +62,10 @@ struct THREEDSX_Header
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// Sizes of the code, rodata and data segments +
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// size of the BSS section (uninitialized latter half of the data segment)
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u32 code_seg_size, rodata_seg_size, data_seg_size, bss_size;
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// offset and size of smdh
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u32 smdh_offset, smdh_size;
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// offset to filesystem
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u32 fs_offset;
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};
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// Relocation header: all fields (even extra unknown fields) are guaranteed to be relocation counts.
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@ -267,4 +271,40 @@ ResultStatus AppLoader_THREEDSX::Load() {
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return ResultStatus::Success;
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}
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ResultStatus AppLoader_THREEDSX::ReadRomFS(std::shared_ptr<FileUtil::IOFile>& romfs_file, u64& offset, u64& size) {
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if (!file.IsOpen())
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return ResultStatus::Error;
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// Reset read pointer in case this file has been read before.
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file.Seek(0, SEEK_SET);
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THREEDSX_Header hdr;
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if (file.ReadBytes(&hdr, sizeof(THREEDSX_Header)) != sizeof(THREEDSX_Header))
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return ResultStatus::Error;
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if (hdr.header_size != sizeof(THREEDSX_Header))
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return ResultStatus::Error;
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// Check if the 3DSX has a RomFS...
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if (hdr.fs_offset != 0) {
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u32 romfs_offset = hdr.fs_offset;
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u32 romfs_size = file.GetSize() - hdr.fs_offset;
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LOG_DEBUG(Loader, "RomFS offset: 0x%08X", romfs_offset);
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LOG_DEBUG(Loader, "RomFS size: 0x%08X", romfs_size);
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// We reopen the file, to allow its position to be independent from file's
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romfs_file = std::make_shared<FileUtil::IOFile>(filepath, "rb");
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if (!romfs_file->IsOpen())
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return ResultStatus::Error;
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offset = romfs_offset;
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size = romfs_size;
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return ResultStatus::Success;
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}
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LOG_DEBUG(Loader, "3DSX has no RomFS");
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return ResultStatus::ErrorNotUsed;
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}
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} // namespace Loader
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@ -17,8 +17,8 @@ namespace Loader {
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/// Loads an 3DSX file
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class AppLoader_THREEDSX final : public AppLoader {
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public:
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AppLoader_THREEDSX(FileUtil::IOFile&& file, std::string filename)
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: AppLoader(std::move(file)), filename(std::move(filename)) {}
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AppLoader_THREEDSX(FileUtil::IOFile&& file, std::string filename, const std::string& filepath)
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: AppLoader(std::move(file)), filename(std::move(filename)), filepath(filepath) {}
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/**
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* Returns the type of the file
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@ -33,8 +33,18 @@ public:
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*/
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ResultStatus Load() override;
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/**
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* Get the RomFS of the application
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* @param romfs_file Reference to buffer to store data
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* @param offset Offset in the file to the RomFS
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* @param size Size of the RomFS in bytes
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* @return ResultStatus result of function
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*/
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ResultStatus ReadRomFS(std::shared_ptr<FileUtil::IOFile>& romfs_file, u64& offset, u64& size) override;
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private:
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std::string filename;
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std::string filepath;
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};
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} // namespace Loader
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@ -116,7 +116,15 @@ ResultStatus LoadFile(const std::string& filename) {
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//3DSX file format...
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case FileType::THREEDSX:
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return AppLoader_THREEDSX(std::move(file), filename_filename).Load();
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{
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AppLoader_THREEDSX app_loader(std::move(file), filename_filename, filename);
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// Load application and RomFS
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if (ResultStatus::Success == app_loader.Load()) {
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Service::FS::RegisterArchiveType(Common::make_unique<FileSys::ArchiveFactory_RomFS>(app_loader), Service::FS::ArchiveIdCode::RomFS);
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return ResultStatus::Success;
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}
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break;
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}
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// Standard ELF file format...
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case FileType::ELF:
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