diff options
Diffstat (limited to 'src/core/file_sys')
| -rw-r--r-- | src/core/file_sys/ncch_container.cpp | 245 | ||||
| -rw-r--r-- | src/core/file_sys/ncch_container.h | 30 |
2 files changed, 206 insertions, 69 deletions
diff --git a/src/core/file_sys/ncch_container.cpp b/src/core/file_sys/ncch_container.cpp index 59c72f3e9..b9fb940c7 100644 --- a/src/core/file_sys/ncch_container.cpp +++ b/src/core/file_sys/ncch_container.cpp @@ -116,92 +116,143 @@ Loader::ResultStatus NCCHContainer::Load() { if (is_loaded) return Loader::ResultStatus::Success; - // Reset read pointer in case this file has been read before. - file.Seek(0, SEEK_SET); + if (file.IsOpen()) { + // Reset read pointer in case this file has been read before. + file.Seek(0, SEEK_SET); - if (file.ReadBytes(&ncch_header, sizeof(NCCH_Header)) != sizeof(NCCH_Header)) - return Loader::ResultStatus::Error; + if (file.ReadBytes(&ncch_header, sizeof(NCCH_Header)) != sizeof(NCCH_Header)) + return Loader::ResultStatus::Error; - // Skip NCSD header and load first NCCH (NCSD is just a container of NCCH files)... - if (Loader::MakeMagic('N', 'C', 'S', 'D') == ncch_header.magic) { - LOG_DEBUG(Service_FS, "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)); - } + // Skip NCSD header and load first NCCH (NCSD is just a container of NCCH files)... + if (Loader::MakeMagic('N', 'C', 'S', 'D') == ncch_header.magic) { + LOG_DEBUG(Service_FS, "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)); + } - // Verify we are loading the correct file type... - if (Loader::MakeMagic('N', 'C', 'C', 'H') != ncch_header.magic) - return Loader::ResultStatus::ErrorInvalidFormat; + // Verify we are loading the correct file type... + if (Loader::MakeMagic('N', 'C', 'C', 'H') != ncch_header.magic) + return Loader::ResultStatus::ErrorInvalidFormat; + + has_header = true; + + // System archives and DLC don't have an extended header but have RomFS + if (ncch_header.extended_header_size) { + if (file.ReadBytes(&exheader_header, sizeof(ExHeader_Header)) != + sizeof(ExHeader_Header)) + return Loader::ResultStatus::Error; + + is_compressed = (exheader_header.codeset_info.flags.flag & 1) == 1; + u32 entry_point = exheader_header.codeset_info.text.address; + u32 code_size = exheader_header.codeset_info.text.code_size; + u32 stack_size = exheader_header.codeset_info.stack_size; + u32 bss_size = exheader_header.codeset_info.bss_size; + u32 core_version = exheader_header.arm11_system_local_caps.core_version; + u8 priority = exheader_header.arm11_system_local_caps.priority; + u8 resource_limit_category = + exheader_header.arm11_system_local_caps.resource_limit_category; + + LOG_DEBUG(Service_FS, "Name: %s", + exheader_header.codeset_info.name); + LOG_DEBUG(Service_FS, "Program ID: %016" PRIX64, + ncch_header.program_id); + LOG_DEBUG(Service_FS, "Code compressed: %s", is_compressed ? "yes" : "no"); + LOG_DEBUG(Service_FS, "Entry point: 0x%08X", entry_point); + LOG_DEBUG(Service_FS, "Code size: 0x%08X", code_size); + LOG_DEBUG(Service_FS, "Stack size: 0x%08X", stack_size); + LOG_DEBUG(Service_FS, "Bss size: 0x%08X", bss_size); + LOG_DEBUG(Service_FS, "Core version: %d", core_version); + LOG_DEBUG(Service_FS, "Thread priority: 0x%X", priority); + LOG_DEBUG(Service_FS, "Resource limit category: %d", resource_limit_category); + LOG_DEBUG(Service_FS, "System Mode: %d", + static_cast<int>(exheader_header.arm11_system_local_caps.system_mode)); + + if (exheader_header.system_info.jump_id != ncch_header.program_id) { + LOG_ERROR(Service_FS, + "ExHeader Program ID mismatch: the ROM is probably encrypted."); + return Loader::ResultStatus::ErrorEncrypted; + } - // System archives and DLC don't have an extended header but have RomFS - if (ncch_header.extended_header_size) { - if (file.ReadBytes(&exheader_header, sizeof(ExHeader_Header)) != sizeof(ExHeader_Header)) - return Loader::ResultStatus::Error; + has_exheader = true; + } - is_compressed = (exheader_header.codeset_info.flags.flag & 1) == 1; - u32 entry_point = exheader_header.codeset_info.text.address; - u32 code_size = exheader_header.codeset_info.text.code_size; - u32 stack_size = exheader_header.codeset_info.stack_size; - u32 bss_size = exheader_header.codeset_info.bss_size; - u32 core_version = exheader_header.arm11_system_local_caps.core_version; - u8 priority = exheader_header.arm11_system_local_caps.priority; - u8 resource_limit_category = - exheader_header.arm11_system_local_caps.resource_limit_category; - - LOG_DEBUG(Service_FS, "Name: %s", exheader_header.codeset_info.name); - LOG_DEBUG(Service_FS, "Program ID: %016" PRIX64, ncch_header.program_id); - LOG_DEBUG(Service_FS, "Code compressed: %s", is_compressed ? "yes" : "no"); - LOG_DEBUG(Service_FS, "Entry point: 0x%08X", entry_point); - LOG_DEBUG(Service_FS, "Code size: 0x%08X", code_size); - LOG_DEBUG(Service_FS, "Stack size: 0x%08X", stack_size); - LOG_DEBUG(Service_FS, "Bss size: 0x%08X", bss_size); - LOG_DEBUG(Service_FS, "Core version: %d", core_version); - LOG_DEBUG(Service_FS, "Thread priority: 0x%X", priority); - LOG_DEBUG(Service_FS, "Resource limit category: %d", resource_limit_category); - LOG_DEBUG(Service_FS, "System Mode: %d", - static_cast<int>(exheader_header.arm11_system_local_caps.system_mode)); - - if (exheader_header.system_info.jump_id != ncch_header.program_id) { - LOG_ERROR(Service_FS, "ExHeader Program ID mismatch: the ROM is probably encrypted."); - return Loader::ResultStatus::ErrorEncrypted; + // DLC can have an ExeFS and a RomFS but no extended header + if (ncch_header.exefs_size) { + exefs_offset = ncch_header.exefs_offset * kBlockSize; + u32 exefs_size = ncch_header.exefs_size * kBlockSize; + + LOG_DEBUG(Service_FS, "ExeFS offset: 0x%08X", exefs_offset); + LOG_DEBUG(Service_FS, "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)) + return Loader::ResultStatus::Error; + + exefs_file = FileUtil::IOFile(filepath, "rb"); + has_exefs = true; } - has_exheader = true; + if (ncch_header.romfs_offset != 0 && ncch_header.romfs_size != 0) + has_romfs = true; } - // DLC can have an ExeFS and a RomFS but no extended header - if (ncch_header.exefs_size) { - exefs_offset = ncch_header.exefs_offset * kBlockSize; - u32 exefs_size = ncch_header.exefs_size * kBlockSize; + LoadOverrides(); - LOG_DEBUG(Service_FS, "ExeFS offset: 0x%08X", exefs_offset); - LOG_DEBUG(Service_FS, "ExeFS size: 0x%08X", exefs_size); + // We need at least one of these or overrides, practically + if (!(has_exefs || has_romfs || is_tainted)) + return Loader::ResultStatus::Error; - file.Seek(exefs_offset + ncch_offset, SEEK_SET); - if (file.ReadBytes(&exefs_header, sizeof(ExeFs_Header)) != sizeof(ExeFs_Header)) - return Loader::ResultStatus::Error; + is_loaded = true; + return Loader::ResultStatus::Success; +} - has_exefs = true; +Loader::ResultStatus NCCHContainer::LoadOverrides() { + // Check for split-off files, mark the archive as tainted if we will use them + std::string romfs_override = filepath + ".romfs"; + if (FileUtil::Exists(romfs_override)) { + is_tainted = true; } - if (ncch_header.romfs_offset != 0 && ncch_header.romfs_size != 0) - has_romfs = true; + // If we have a split-off exefs file/folder, it takes priority + std::string exefs_override = filepath + ".exefs"; + std::string exefsdir_override = filepath + ".exefsdir/"; + if (FileUtil::Exists(exefs_override)) { + exefs_file = FileUtil::IOFile(exefs_override, "rb"); + + if (exefs_file.ReadBytes(&exefs_header, sizeof(ExeFs_Header)) == sizeof(ExeFs_Header)) { + LOG_DEBUG(Service_FS, "Loading ExeFS section from %s", exefs_override.c_str()); + exefs_offset = 0; + is_tainted = true; + has_exefs = true; + } else { + exefs_file = FileUtil::IOFile(filepath, "rb"); + } + } else if (FileUtil::Exists(exefsdir_override) && FileUtil::IsDirectory(exefsdir_override)) { + is_tainted = true; + } + + if (is_tainted) + LOG_WARNING(Service_FS, + "Loaded NCCH %s is tainted, application behavior may not be as expected!", + filepath.c_str()); - is_loaded = true; return Loader::ResultStatus::Success; } Loader::ResultStatus NCCHContainer::LoadSectionExeFS(const char* name, std::vector<u8>& buffer) { - if (!file.IsOpen()) - return Loader::ResultStatus::Error; - Loader::ResultStatus result = Load(); if (result != Loader::ResultStatus::Success) return result; - if (!has_exefs) - return Loader::ResultStatus::ErrorNotUsed; + // Check if we have files that can drop-in and replace + result = LoadOverrideExeFSSection(name, buffer); + if (result == Loader::ResultStatus::Success || !has_exefs) + return result; + + // If we don't have any separate files, we'll need a full ExeFS + if (!exefs_file.IsOpen()) + return Loader::ResultStatus::Error; LOG_DEBUG(Service_FS, "%d sections:", kMaxSections); // Iterate through the ExeFs archive until we find a section with the specified name... @@ -215,7 +266,7 @@ Loader::ResultStatus NCCHContainer::LoadSectionExeFS(const char* name, std::vect s64 section_offset = (section.offset + exefs_offset + sizeof(ExeFs_Header) + ncch_offset); - file.Seek(section_offset, SEEK_SET); + exefs_file.Seek(section_offset, SEEK_SET); if (strcmp(section.name, ".code") == 0 && is_compressed) { // Section is compressed, read compressed .code section... @@ -226,7 +277,7 @@ Loader::ResultStatus NCCHContainer::LoadSectionExeFS(const char* name, std::vect return Loader::ResultStatus::ErrorMemoryAllocationFailed; } - if (file.ReadBytes(&temp_buffer[0], section.size) != section.size) + if (exefs_file.ReadBytes(&temp_buffer[0], section.size) != section.size) return Loader::ResultStatus::Error; // Decompress .code section... @@ -237,7 +288,7 @@ Loader::ResultStatus NCCHContainer::LoadSectionExeFS(const char* name, std::vect } else { // Section is uncompressed... buffer.resize(section.size); - if (file.ReadBytes(&buffer[0], section.size) != section.size) + if (exefs_file.ReadBytes(&buffer[0], section.size) != section.size) return Loader::ResultStatus::Error; } return Loader::ResultStatus::Success; @@ -246,20 +297,56 @@ Loader::ResultStatus NCCHContainer::LoadSectionExeFS(const char* name, std::vect return Loader::ResultStatus::ErrorNotUsed; } -Loader::ResultStatus NCCHContainer::ReadRomFS(std::shared_ptr<FileUtil::IOFile>& romfs_file, - u64& offset, u64& size) { - if (!file.IsOpen()) +Loader::ResultStatus NCCHContainer::LoadOverrideExeFSSection(const char* name, + std::vector<u8>& buffer) { + std::string override_name; + + // Map our section name to the extracted equivalent + if (!strcmp(name, ".code")) + override_name = "code.bin"; + else if (!strcmp(name, "icon")) + override_name = "code.bin"; + else if (!strcmp(name, "banner")) + override_name = "banner.bnr"; + else if (!strcmp(name, "logo")) + override_name = "logo.bcma.lz"; + else return Loader::ResultStatus::Error; + std::string section_override = filepath + ".exefsdir/" + override_name; + FileUtil::IOFile section_file(section_override, "rb"); + + if (section_file.IsOpen()) { + auto section_size = section_file.GetSize(); + buffer.resize(section_size); + + section_file.Seek(0, SEEK_SET); + if (section_file.ReadBytes(&buffer[0], section_size) == section_size) { + LOG_WARNING(Service_FS, "File %s overriding built-in ExeFS file", + section_override.c_str()); + return Loader::ResultStatus::Success; + } + } + return Loader::ResultStatus::ErrorNotUsed; +} + +Loader::ResultStatus NCCHContainer::ReadRomFS(std::shared_ptr<FileUtil::IOFile>& romfs_file, + u64& offset, u64& size) { Loader::ResultStatus result = Load(); if (result != Loader::ResultStatus::Success) return result; + if (ReadOverrideRomFS(romfs_file, offset, size) == Loader::ResultStatus::Success) + return Loader::ResultStatus::Success; + if (!has_romfs) { LOG_DEBUG(Service_FS, "RomFS requested from NCCH which has no RomFS"); return Loader::ResultStatus::ErrorNotUsed; } + if (!file.IsOpen()) + return Loader::ResultStatus::Error; + u32 romfs_offset = ncch_offset + (ncch_header.romfs_offset * kBlockSize) + 0x1000; u32 romfs_size = (ncch_header.romfs_size * kBlockSize) - 0x1000; @@ -280,11 +367,31 @@ Loader::ResultStatus NCCHContainer::ReadRomFS(std::shared_ptr<FileUtil::IOFile>& return Loader::ResultStatus::Success; } +Loader::ResultStatus NCCHContainer::ReadOverrideRomFS(std::shared_ptr<FileUtil::IOFile>& romfs_file, + u64& offset, u64& size) { + // Check for RomFS overrides + std::string split_filepath = filepath + ".romfs"; + if (FileUtil::Exists(split_filepath)) { + romfs_file = std::make_shared<FileUtil::IOFile>(split_filepath, "rb"); + if (romfs_file->IsOpen()) { + LOG_WARNING(Service_FS, "File %s overriding built-in RomFS", split_filepath.c_str()); + offset = 0; + size = romfs_file->GetSize(); + return Loader::ResultStatus::Success; + } + } + + return Loader::ResultStatus::ErrorNotUsed; +} + Loader::ResultStatus NCCHContainer::ReadProgramId(u64_le& program_id) { Loader::ResultStatus result = Load(); if (result != Loader::ResultStatus::Success) return result; + if (!has_header) + return Loader::ResultStatus::ErrorNotUsed; + program_id = ncch_header.program_id; return Loader::ResultStatus::Success; } diff --git a/src/core/file_sys/ncch_container.h b/src/core/file_sys/ncch_container.h index 8af9032b4..2cc9d13dc 100644 --- a/src/core/file_sys/ncch_container.h +++ b/src/core/file_sys/ncch_container.h @@ -180,6 +180,13 @@ public: Loader::ResultStatus Load(); /** + * Attempt to find overridden sections for the NCCH and mark the container as tainted + * if any are found. + * @return ResultStatus result of function + */ + Loader::ResultStatus LoadOverrides(); + + /** * Reads an application ExeFS section of an NCCH file (e.g. .code, .logo, etc.) * @param name Name of section to read out of NCCH file * @param buffer Vector to read data into @@ -188,6 +195,15 @@ public: Loader::ResultStatus LoadSectionExeFS(const char* name, std::vector<u8>& buffer); /** + * Reads an application ExeFS section from external files instead of an NCCH file, + * (e.g. code.bin, logo.bcma.lz, icon.icn, banner.bnr) + * @param name Name of section to read from external files + * @param buffer Vector to read data into + * @return ResultStatus result of function + */ + Loader::ResultStatus LoadOverrideExeFSSection(const char* name, std::vector<u8>& buffer); + + /** * Get the RomFS of the NCCH container * 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 @@ -199,6 +215,17 @@ public: u64& size); /** + * Get the override RomFS of the NCCH container + * 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 + */ + Loader::ResultStatus ReadOverrideRomFS(std::shared_ptr<FileUtil::IOFile>& romfs_file, + u64& offset, u64& size); + + /** * Get the Program ID of the NCCH container * @return ResultStatus result of function */ @@ -227,10 +254,12 @@ public: ExHeader_Header exheader_header; private: + bool has_header = false; bool has_exheader = false; bool has_exefs = false; bool has_romfs = false; + bool is_tainted = false; // Are there parts of this container being overridden? bool is_loaded = false; bool is_compressed = false; @@ -239,6 +268,7 @@ private: std::string filepath; FileUtil::IOFile file; + FileUtil::IOFile exefs_file; }; } // namespace FileSys |