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https://github.com/Lime3DS/Lime3DS
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774e7deae8
The loaders now register each loaded ROM with the SelfNCCH factory, which keeps the data around for the duration of the emulation session. When opening the SelfNCCH archive, the factory queries the current program's programid and uses that as a key to the map that contains the NCCHData structure (RomFS, Icon, Banner, etc). 3dsx files do not have a programid and will use a default of 0 for this value, thus, only 1 3dsx file with RomFS is loadable at the same time.
296 lines
10 KiB
C++
296 lines
10 KiB
C++
// Copyright 2017 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <array>
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#include <cinttypes>
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#include "common/common_types.h"
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#include "common/logging/log.h"
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#include "common/swap.h"
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#include "core/file_sys/archive_selfncch.h"
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#include "core/file_sys/errors.h"
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#include "core/file_sys/ivfc_archive.h"
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#include "core/hle/kernel/process.h"
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////////////////////////////////////////////////////////////////////////////////////////////////////
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// FileSys namespace
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namespace FileSys {
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enum class SelfNCCHFilePathType : u32 {
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RomFS = 0,
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Code = 1, // This is not supported by SelfNCCHArchive but by archive 0x2345678E
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ExeFS = 2,
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UpdateRomFS = 5, // This is presumably for accessing the RomFS of the update patch.
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};
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struct SelfNCCHFilePath {
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u32_le type;
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std::array<char, 8> exefs_filename;
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};
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static_assert(sizeof(SelfNCCHFilePath) == 12, "NCCHFilePath has wrong size!");
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// A read-only file created from a block of data. It only allows you to read the entire file at
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// once, in a single read operation.
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class ExeFSSectionFile final : public FileBackend {
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public:
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explicit ExeFSSectionFile(std::shared_ptr<std::vector<u8>> data_) : data(std::move(data_)) {}
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ResultVal<size_t> Read(u64 offset, size_t length, u8* buffer) const override {
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if (offset != 0) {
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LOG_ERROR(Service_FS, "offset must be zero!");
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return ERROR_UNSUPPORTED_OPEN_FLAGS;
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}
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if (length != data->size()) {
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LOG_ERROR(Service_FS, "size must match the file size!");
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return ERROR_INCORRECT_EXEFS_READ_SIZE;
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}
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std::memcpy(buffer, data->data(), data->size());
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return MakeResult<size_t>(data->size());
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}
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ResultVal<size_t> Write(u64 offset, size_t length, bool flush,
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const u8* buffer) const override {
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LOG_ERROR(Service_FS, "The file is read-only!");
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return ERROR_UNSUPPORTED_OPEN_FLAGS;
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}
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u64 GetSize() const override {
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return data->size();
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}
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bool SetSize(u64 size) const override {
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return false;
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}
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bool Close() const override {
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return true;
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}
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void Flush() const override {}
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private:
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std::shared_ptr<std::vector<u8>> data;
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};
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// SelfNCCHArchive represents the running application itself. From this archive the application can
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// open RomFS and ExeFS, excluding the .code section.
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class SelfNCCHArchive final : public ArchiveBackend {
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public:
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explicit SelfNCCHArchive(const NCCHData& ncch_data_) : ncch_data(ncch_data_) {}
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std::string GetName() const override {
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return "SelfNCCHArchive";
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}
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ResultVal<std::unique_ptr<FileBackend>> OpenFile(const Path& path, const Mode&) const override {
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// Note: SelfNCCHArchive doesn't check the open mode.
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if (path.GetType() != LowPathType::Binary) {
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LOG_ERROR(Service_FS, "Path need to be Binary");
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return ERROR_INVALID_PATH;
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}
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std::vector<u8> binary = path.AsBinary();
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if (binary.size() != sizeof(SelfNCCHFilePath)) {
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LOG_ERROR(Service_FS, "Wrong path size %zu", binary.size());
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return ERROR_INVALID_PATH;
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}
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SelfNCCHFilePath file_path;
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std::memcpy(&file_path, binary.data(), sizeof(SelfNCCHFilePath));
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switch (static_cast<SelfNCCHFilePathType>(file_path.type)) {
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case SelfNCCHFilePathType::UpdateRomFS:
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return OpenUpdateRomFS();
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case SelfNCCHFilePathType::RomFS:
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return OpenRomFS();
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case SelfNCCHFilePathType::Code:
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LOG_ERROR(Service_FS, "Reading the code section is not supported!");
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return ERROR_COMMAND_NOT_ALLOWED;
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case SelfNCCHFilePathType::ExeFS: {
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const auto& raw = file_path.exefs_filename;
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auto end = std::find(raw.begin(), raw.end(), '\0');
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std::string filename(raw.begin(), end);
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return OpenExeFS(filename);
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}
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default:
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LOG_ERROR(Service_FS, "Unknown file type %u!", static_cast<u32>(file_path.type));
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return ERROR_INVALID_PATH;
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}
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}
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ResultCode DeleteFile(const Path& path) const override {
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LOG_ERROR(Service_FS, "Unsupported");
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return ERROR_UNSUPPORTED_OPEN_FLAGS;
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}
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ResultCode RenameFile(const Path& src_path, const Path& dest_path) const override {
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LOG_ERROR(Service_FS, "Unsupported");
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return ERROR_UNSUPPORTED_OPEN_FLAGS;
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}
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ResultCode DeleteDirectory(const Path& path) const override {
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LOG_ERROR(Service_FS, "Unsupported");
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return ERROR_UNSUPPORTED_OPEN_FLAGS;
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}
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ResultCode DeleteDirectoryRecursively(const Path& path) const override {
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LOG_ERROR(Service_FS, "Unsupported");
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return ERROR_UNSUPPORTED_OPEN_FLAGS;
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}
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ResultCode CreateFile(const Path& path, u64 size) const override {
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LOG_ERROR(Service_FS, "Unsupported");
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return ERROR_UNSUPPORTED_OPEN_FLAGS;
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}
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ResultCode CreateDirectory(const Path& path) const override {
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LOG_ERROR(Service_FS, "Unsupported");
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return ERROR_UNSUPPORTED_OPEN_FLAGS;
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}
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ResultCode RenameDirectory(const Path& src_path, const Path& dest_path) const override {
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LOG_ERROR(Service_FS, "Unsupported");
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return ERROR_UNSUPPORTED_OPEN_FLAGS;
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}
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ResultVal<std::unique_ptr<DirectoryBackend>> OpenDirectory(const Path& path) const override {
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LOG_ERROR(Service_FS, "Unsupported");
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return ERROR_UNSUPPORTED_OPEN_FLAGS;
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}
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u64 GetFreeBytes() const override {
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return 0;
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}
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private:
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ResultVal<std::unique_ptr<FileBackend>> OpenRomFS() const {
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if (ncch_data.romfs_file) {
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return MakeResult<std::unique_ptr<FileBackend>>(std::make_unique<IVFCFile>(
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ncch_data.romfs_file, ncch_data.romfs_offset, ncch_data.romfs_size));
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} else {
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LOG_INFO(Service_FS, "Unable to read RomFS");
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return ERROR_ROMFS_NOT_FOUND;
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}
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}
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ResultVal<std::unique_ptr<FileBackend>> OpenUpdateRomFS() const {
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if (ncch_data.update_romfs_file) {
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return MakeResult<std::unique_ptr<FileBackend>>(std::make_unique<IVFCFile>(
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ncch_data.update_romfs_file, ncch_data.update_romfs_offset,
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ncch_data.update_romfs_size));
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} else {
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LOG_INFO(Service_FS, "Unable to read update RomFS");
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return ERROR_ROMFS_NOT_FOUND;
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}
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}
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ResultVal<std::unique_ptr<FileBackend>> OpenExeFS(const std::string& filename) const {
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if (filename == "icon") {
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if (ncch_data.icon) {
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return MakeResult<std::unique_ptr<FileBackend>>(
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std::make_unique<ExeFSSectionFile>(ncch_data.icon));
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}
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LOG_WARNING(Service_FS, "Unable to read icon");
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return ERROR_EXEFS_SECTION_NOT_FOUND;
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}
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if (filename == "logo") {
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if (ncch_data.logo) {
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return MakeResult<std::unique_ptr<FileBackend>>(
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std::make_unique<ExeFSSectionFile>(ncch_data.logo));
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}
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LOG_WARNING(Service_FS, "Unable to read logo");
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return ERROR_EXEFS_SECTION_NOT_FOUND;
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}
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if (filename == "banner") {
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if (ncch_data.banner) {
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return MakeResult<std::unique_ptr<FileBackend>>(
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std::make_unique<ExeFSSectionFile>(ncch_data.banner));
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}
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LOG_WARNING(Service_FS, "Unable to read banner");
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return ERROR_EXEFS_SECTION_NOT_FOUND;
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}
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LOG_ERROR(Service_FS, "Unknown ExeFS section %s!", filename.c_str());
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return ERROR_INVALID_PATH;
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}
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NCCHData ncch_data;
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};
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void ArchiveFactory_SelfNCCH::Register(Loader::AppLoader& app_loader) {
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u64 program_id = 0;
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if (app_loader.ReadProgramId(program_id) != Loader::ResultStatus::Success) {
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LOG_WARNING(
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Service_FS,
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"Could not read program id when registering with SelfNCCH, this might be a 3dsx file");
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}
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LOG_DEBUG(Service_FS, "Registering program %016" PRIX64 " with the SelfNCCH archive factory",
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program_id);
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if (ncch_data.find(program_id) != ncch_data.end()) {
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LOG_WARNING(Service_FS, "Registering program %016" PRIX64
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" with SelfNCCH will override existing mapping",
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program_id);
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}
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NCCHData& data = ncch_data[program_id];
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std::shared_ptr<FileUtil::IOFile> romfs_file_;
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if (Loader::ResultStatus::Success ==
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app_loader.ReadRomFS(romfs_file_, data.romfs_offset, data.romfs_size)) {
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data.romfs_file = std::move(romfs_file_);
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}
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std::shared_ptr<FileUtil::IOFile> update_romfs_file;
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if (Loader::ResultStatus::Success ==
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app_loader.ReadUpdateRomFS(update_romfs_file, data.update_romfs_offset,
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data.update_romfs_size)) {
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data.update_romfs_file = std::move(update_romfs_file);
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}
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std::vector<u8> buffer;
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if (Loader::ResultStatus::Success == app_loader.ReadIcon(buffer))
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data.icon = std::make_shared<std::vector<u8>>(std::move(buffer));
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buffer.clear();
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if (Loader::ResultStatus::Success == app_loader.ReadLogo(buffer))
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data.logo = std::make_shared<std::vector<u8>>(std::move(buffer));
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buffer.clear();
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if (Loader::ResultStatus::Success == app_loader.ReadBanner(buffer))
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data.banner = std::make_shared<std::vector<u8>>(std::move(buffer));
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}
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ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_SelfNCCH::Open(const Path& path) {
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auto archive = std::make_unique<SelfNCCHArchive>(
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ncch_data[Kernel::g_current_process->codeset->program_id]);
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return MakeResult<std::unique_ptr<ArchiveBackend>>(std::move(archive));
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}
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ResultCode ArchiveFactory_SelfNCCH::Format(const Path&, const FileSys::ArchiveFormatInfo&) {
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LOG_ERROR(Service_FS, "Attempted to format a SelfNCCH archive.");
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return ERROR_INVALID_PATH;
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}
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ResultVal<ArchiveFormatInfo> ArchiveFactory_SelfNCCH::GetFormatInfo(const Path&) const {
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LOG_ERROR(Service_FS, "Attempted to get format info of a SelfNCCH archive");
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return ERROR_INVALID_PATH;
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}
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} // namespace FileSys
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