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// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <cinttypes>
#include "common/common_funcs.h"
#include "common/common_paths.h"
#include "common/file_util.h"
#include "common/logging/log.h"
#include "common/string_util.h"
#include "core/file_sys/romfs_factory.h"
#include "core/hle/kernel/process.h"
#include "core/hle/kernel/resource_limit.h"
#include "core/hle/service/filesystem/filesystem.h"
#include "core/loader/deconstructed_rom_directory.h"
#include "core/loader/nso.h"
#include "core/memory.h"
namespace Loader {
static std::string FindRomFS(const std::string& directory) {
std::string filepath_romfs;
const auto callback = [&filepath_romfs](unsigned*, const std::string& directory,
const std::string& virtual_name) -> bool {
const std::string physical_name = directory + virtual_name;
if (FileUtil::IsDirectory(physical_name)) {
// Skip directories
return true;
}
// Verify extension
const std::string extension = physical_name.substr(physical_name.find_last_of(".") + 1);
if (Common::ToLower(extension) != "romfs") {
return true;
}
// Found it - we are done
filepath_romfs = std::move(physical_name);
return false;
};
// Search the specified directory recursively, looking for the first .romfs file, which will
// be used for the RomFS
FileUtil::ForeachDirectoryEntry(nullptr, directory, callback);
return filepath_romfs;
}
AppLoader_DeconstructedRomDirectory::AppLoader_DeconstructedRomDirectory(FileUtil::IOFile&& file,
std::string filepath)
: AppLoader(std::move(file)), filepath(std::move(filepath)) {}
FileType AppLoader_DeconstructedRomDirectory::IdentifyType(FileUtil::IOFile& file,
const std::string& filepath) {
bool is_main_found{};
bool is_npdm_found{};
bool is_rtld_found{};
bool is_sdk_found{};
const auto callback = [&](unsigned* num_entries_out, const std::string& directory,
const std::string& virtual_name) -> bool {
// Skip directories
std::string physical_name = directory + virtual_name;
if (FileUtil::IsDirectory(physical_name)) {
return true;
}
// Verify filename
if (Common::ToLower(virtual_name) == "main") {
is_main_found = true;
} else if (Common::ToLower(virtual_name) == "main.npdm") {
is_npdm_found = true;
return true;
} else if (Common::ToLower(virtual_name) == "rtld") {
is_rtld_found = true;
} else if (Common::ToLower(virtual_name) == "sdk") {
is_sdk_found = true;
} else {
// Continue searching
return true;
}
// Verify file is an NSO
FileUtil::IOFile file(physical_name, "rb");
if (AppLoader_NSO::IdentifyType(file, physical_name) != FileType::NSO) {
return false;
}
// We are done if we've found and verified all required NSOs
return !(is_main_found && is_npdm_found && is_rtld_found && is_sdk_found);
};
// Search the directory recursively, looking for the required modules
const std::string directory = filepath.substr(0, filepath.find_last_of("/\\")) + DIR_SEP;
FileUtil::ForeachDirectoryEntry(nullptr, directory, callback);
if (is_main_found && is_npdm_found && is_rtld_found && is_sdk_found) {
return FileType::DeconstructedRomDirectory;
}
return FileType::Error;
}
ResultStatus AppLoader_DeconstructedRomDirectory::Load(
Kernel::SharedPtr<Kernel::Process>& process) {
if (is_loaded) {
return ResultStatus::ErrorAlreadyLoaded;
}
if (!file.IsOpen()) {
return ResultStatus::Error;
}
const std::string directory = filepath.substr(0, filepath.find_last_of("/\\")) + DIR_SEP;
const std::string npdm_path = directory + DIR_SEP + "main.npdm";
ResultStatus result = metadata.Load(npdm_path);
if (result != ResultStatus::Success) {
return result;
}
metadata.Print();
const FileSys::ProgramAddressSpaceType arch_bits{metadata.GetAddressSpaceType()};
if (arch_bits == FileSys::ProgramAddressSpaceType::Is32Bit) {
return ResultStatus::ErrorUnsupportedArch;
}
// Load NSO modules
VAddr next_load_addr{Memory::PROCESS_IMAGE_VADDR};
for (const auto& module : {"rtld", "main", "subsdk0", "subsdk1", "subsdk2", "subsdk3",
"subsdk4", "subsdk5", "subsdk6", "subsdk7", "sdk"}) {
const std::string path = directory + DIR_SEP + module;
const VAddr load_addr = next_load_addr;
next_load_addr = AppLoader_NSO::LoadModule(path, load_addr);
if (next_load_addr) {
NGLOG_DEBUG(Loader, "loaded module {} @ 0x{:X}", module, load_addr);
} else {
next_load_addr = load_addr;
}
}
process->program_id = metadata.GetTitleID();
process->svc_access_mask.set();
process->address_mappings = default_address_mappings;
process->resource_limit =
Kernel::ResourceLimit::GetForCategory(Kernel::ResourceLimitCategory::APPLICATION);
process->Run(Memory::PROCESS_IMAGE_VADDR, metadata.GetMainThreadPriority(),
metadata.GetMainThreadStackSize());
// Find the RomFS by searching for a ".romfs" file in this directory
filepath_romfs = FindRomFS(directory);
// Register the RomFS if a ".romfs" file was found
if (!filepath_romfs.empty()) {
Service::FileSystem::RegisterFileSystem(std::make_unique<FileSys::RomFS_Factory>(*this),
Service::FileSystem::Type::RomFS);
}
is_loaded = true;
return ResultStatus::Success;
}
ResultStatus AppLoader_DeconstructedRomDirectory::ReadRomFS(
std::shared_ptr<FileUtil::IOFile>& romfs_file, u64& offset, u64& size) {
if (filepath_romfs.empty()) {
NGLOG_DEBUG(Loader, "No RomFS available");
return ResultStatus::ErrorNotUsed;
}
// We reopen the file, to allow its position to be independent
romfs_file = std::make_shared<FileUtil::IOFile>(filepath_romfs, "rb");
if (!romfs_file->IsOpen()) {
return ResultStatus::Error;
}
offset = 0;
size = romfs_file->GetSize();
NGLOG_DEBUG(Loader, "RomFS offset: 0x{:016X}", offset);
NGLOG_DEBUG(Loader, "RomFS size: 0x{:016X}", size);
// Reset read pointer
file.Seek(0, SEEK_SET);
return ResultStatus::Success;
}
} // namespace Loader
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