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-rw-r--r--src/core/file_sys/ncch_container.cpp245
-rw-r--r--src/core/file_sys/ncch_container.h30
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