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yuzu/src/core/file_sys/patch_manager.cpp
Lioncash 5c72aa7c4c patch_manager: Prevent use of a dangling pointer within PatchRomFS 
fmt::format() returns a std::string instance by value, so calling
.c_str() on it here is equivalent to doing:

auto* ptr = std::string{}.c_str();

The data being pointed to isn't guaranteed to actually be valid anymore
after that expression ends. Instead, we can just take the string as is,
and provide the necessary formatting parameters.
2018-12-11 10:08:13 -05:00

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// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <array>
#include <cstddef>
#include <cstring>
#include "common/hex_util.h"
#include "common/logging/log.h"
#include "core/file_sys/content_archive.h"
#include "core/file_sys/control_metadata.h"
#include "core/file_sys/ips_layer.h"
#include "core/file_sys/patch_manager.h"
#include "core/file_sys/registered_cache.h"
#include "core/file_sys/romfs.h"
#include "core/file_sys/vfs_layered.h"
#include "core/file_sys/vfs_vector.h"
#include "core/hle/service/filesystem/filesystem.h"
#include "core/loader/loader.h"
#include "core/settings.h"
namespace FileSys {
constexpr u64 SINGLE_BYTE_MODULUS = 0x100;
constexpr u64 DLC_BASE_TITLE_ID_MASK = 0xFFFFFFFFFFFFE000;
constexpr std::array<const char*, 14> EXEFS_FILE_NAMES{
"main", "main.npdm", "rtld", "sdk", "subsdk0", "subsdk1", "subsdk2",
"subsdk3", "subsdk4", "subsdk5", "subsdk6", "subsdk7", "subsdk8", "subsdk9",
};
struct NSOBuildHeader {
u32_le magic;
INSERT_PADDING_BYTES(0x3C);
std::array<u8, 0x20> build_id;
INSERT_PADDING_BYTES(0xA0);
};
static_assert(sizeof(NSOBuildHeader) == 0x100, "NSOBuildHeader has incorrect size.");
std::string FormatTitleVersion(u32 version, TitleVersionFormat format) {
std::array<u8, sizeof(u32)> bytes{};
bytes[0] = version % SINGLE_BYTE_MODULUS;
for (std::size_t i = 1; i < bytes.size(); ++i) {
version /= SINGLE_BYTE_MODULUS;
bytes[i] = version % SINGLE_BYTE_MODULUS;
}
if (format == TitleVersionFormat::FourElements)
return fmt::format("v{}.{}.{}.{}", bytes[3], bytes[2], bytes[1], bytes[0]);
return fmt::format("v{}.{}.{}", bytes[3], bytes[2], bytes[1]);
}
PatchManager::PatchManager(u64 title_id) : title_id(title_id) {}
PatchManager::~PatchManager() = default;
u64 PatchManager::GetTitleID() const {
return title_id;
}
VirtualDir PatchManager::PatchExeFS(VirtualDir exefs) const {
LOG_INFO(Loader, "Patching ExeFS for title_id={:016X}", title_id);
if (exefs == nullptr)
return exefs;
if (Settings::values.dump_exefs) {
LOG_INFO(Loader, "Dumping ExeFS for title_id={:016X}", title_id);
const auto dump_dir = Service::FileSystem::GetModificationDumpRoot(title_id);
if (dump_dir != nullptr) {
const auto exefs_dir = GetOrCreateDirectoryRelative(dump_dir, "/exefs");
VfsRawCopyD(exefs, exefs_dir);
}
}
const auto installed = Service::FileSystem::GetUnionContents();
const auto& disabled = Settings::values.disabled_addons[title_id];
const auto update_disabled =
std::find(disabled.begin(), disabled.end(), "Update") != disabled.end();
// Game Updates
const auto update_tid = GetUpdateTitleID(title_id);
const auto update = installed.GetEntry(update_tid, ContentRecordType::Program);
if (!update_disabled && update != nullptr && update->GetExeFS() != nullptr &&
update->GetStatus() == Loader::ResultStatus::ErrorMissingBKTRBaseRomFS) {
LOG_INFO(Loader, " ExeFS: Update ({}) applied successfully",
FormatTitleVersion(installed.GetEntryVersion(update_tid).value_or(0)));
exefs = update->GetExeFS();
}
// LayeredExeFS
const auto load_dir = Service::FileSystem::GetModificationLoadRoot(title_id);
if (load_dir != nullptr && load_dir->GetSize() > 0) {
auto patch_dirs = load_dir->GetSubdirectories();
std::sort(
patch_dirs.begin(), patch_dirs.end(),
[](const VirtualDir& l, const VirtualDir& r) { return l->GetName() < r->GetName(); });
std::vector<VirtualDir> layers;
layers.reserve(patch_dirs.size() + 1);
for (const auto& subdir : patch_dirs) {
if (std::find(disabled.begin(), disabled.end(), subdir->GetName()) != disabled.end())
continue;
auto exefs_dir = subdir->GetSubdirectory("exefs");
if (exefs_dir != nullptr)
layers.push_back(std::move(exefs_dir));
}
layers.push_back(exefs);
auto layered = LayeredVfsDirectory::MakeLayeredDirectory(std::move(layers));
if (layered != nullptr) {
LOG_INFO(Loader, " ExeFS: LayeredExeFS patches applied successfully");
exefs = std::move(layered);
}
}
return exefs;
}
std::vector<VirtualFile> PatchManager::CollectPatches(const std::vector<VirtualDir>& patch_dirs,
const std::string& build_id) const {
const auto& disabled = Settings::values.disabled_addons[title_id];
std::vector<VirtualFile> out;
out.reserve(patch_dirs.size());
for (const auto& subdir : patch_dirs) {
if (std::find(disabled.begin(), disabled.end(), subdir->GetName()) != disabled.end())
continue;
auto exefs_dir = subdir->GetSubdirectory("exefs");
if (exefs_dir != nullptr) {
for (const auto& file : exefs_dir->GetFiles()) {
if (file->GetExtension() == "ips") {
auto name = file->GetName();
const auto p1 = name.substr(0, name.find('.'));
const auto this_build_id = p1.substr(0, p1.find_last_not_of('0') + 1);
if (build_id == this_build_id)
out.push_back(file);
} else if (file->GetExtension() == "pchtxt") {
IPSwitchCompiler compiler{file};
if (!compiler.IsValid())
continue;
auto this_build_id = Common::HexArrayToString(compiler.GetBuildID());
this_build_id =
this_build_id.substr(0, this_build_id.find_last_not_of('0') + 1);
if (build_id == this_build_id)
out.push_back(file);
}
}
}
}
return out;
}
std::vector<u8> PatchManager::PatchNSO(const std::vector<u8>& nso) const {
if (nso.size() < 0x100)
return nso;
NSOBuildHeader header;
std::memcpy(&header, nso.data(), sizeof(NSOBuildHeader));
if (header.magic != Common::MakeMagic('N', 'S', 'O', '0'))
return nso;
const auto build_id_raw = Common::HexArrayToString(header.build_id);
const auto build_id = build_id_raw.substr(0, build_id_raw.find_last_not_of('0') + 1);
if (Settings::values.dump_nso) {
LOG_INFO(Loader, "Dumping NSO for build_id={}, title_id={:016X}", build_id, title_id);
const auto dump_dir = Service::FileSystem::GetModificationDumpRoot(title_id);
if (dump_dir != nullptr) {
const auto nso_dir = GetOrCreateDirectoryRelative(dump_dir, "/nso");
const auto file = nso_dir->CreateFile(fmt::format("{}.nso", build_id));
file->Resize(nso.size());
file->WriteBytes(nso);
}
}
LOG_INFO(Loader, "Patching NSO for build_id={}", build_id);
const auto load_dir = Service::FileSystem::GetModificationLoadRoot(title_id);
auto patch_dirs = load_dir->GetSubdirectories();
std::sort(patch_dirs.begin(), patch_dirs.end(),
[](const VirtualDir& l, const VirtualDir& r) { return l->GetName() < r->GetName(); });
const auto patches = CollectPatches(patch_dirs, build_id);
auto out = nso;
for (const auto& patch_file : patches) {
if (patch_file->GetExtension() == "ips") {
LOG_INFO(Loader, " - Applying IPS patch from mod \"{}\"",
patch_file->GetContainingDirectory()->GetParentDirectory()->GetName());
const auto patched = PatchIPS(std::make_shared<VectorVfsFile>(out), patch_file);
if (patched != nullptr)
out = patched->ReadAllBytes();
} else if (patch_file->GetExtension() == "pchtxt") {
LOG_INFO(Loader, " - Applying IPSwitch patch from mod \"{}\"",
patch_file->GetContainingDirectory()->GetParentDirectory()->GetName());
const IPSwitchCompiler compiler{patch_file};
const auto patched = compiler.Apply(std::make_shared<VectorVfsFile>(out));
if (patched != nullptr)
out = patched->ReadAllBytes();
}
}
if (out.size() < 0x100)
return nso;
std::memcpy(out.data(), &header, sizeof(NSOBuildHeader));
return out;
}
bool PatchManager::HasNSOPatch(const std::array<u8, 32>& build_id_) const {
const auto build_id_raw = Common::HexArrayToString(build_id_);
const auto build_id = build_id_raw.substr(0, build_id_raw.find_last_not_of('0') + 1);
LOG_INFO(Loader, "Querying NSO patch existence for build_id={}", build_id);
const auto load_dir = Service::FileSystem::GetModificationLoadRoot(title_id);
auto patch_dirs = load_dir->GetSubdirectories();
std::sort(patch_dirs.begin(), patch_dirs.end(),
[](const VirtualDir& l, const VirtualDir& r) { return l->GetName() < r->GetName(); });
return !CollectPatches(patch_dirs, build_id).empty();
}
static void ApplyLayeredFS(VirtualFile& romfs, u64 title_id, ContentRecordType type) {
const auto load_dir = Service::FileSystem::GetModificationLoadRoot(title_id);
if ((type != ContentRecordType::Program && type != ContentRecordType::Data) ||
load_dir == nullptr || load_dir->GetSize() <= 0) {
return;
}
auto extracted = ExtractRomFS(romfs);
if (extracted == nullptr) {
return;
}
const auto& disabled = Settings::values.disabled_addons[title_id];
auto patch_dirs = load_dir->GetSubdirectories();
std::sort(patch_dirs.begin(), patch_dirs.end(),
[](const VirtualDir& l, const VirtualDir& r) { return l->GetName() < r->GetName(); });
std::vector<VirtualDir> layers;
std::vector<VirtualDir> layers_ext;
layers.reserve(patch_dirs.size() + 1);
layers_ext.reserve(patch_dirs.size() + 1);
for (const auto& subdir : patch_dirs) {
if (std::find(disabled.begin(), disabled.end(), subdir->GetName()) != disabled.end())
continue;
auto romfs_dir = subdir->GetSubdirectory("romfs");
if (romfs_dir != nullptr)
layers.push_back(std::move(romfs_dir));
auto ext_dir = subdir->GetSubdirectory("romfs_ext");
if (ext_dir != nullptr)
layers_ext.push_back(std::move(ext_dir));
}
layers.push_back(std::move(extracted));
auto layered = LayeredVfsDirectory::MakeLayeredDirectory(std::move(layers));
if (layered == nullptr) {
return;
}
auto layered_ext = LayeredVfsDirectory::MakeLayeredDirectory(std::move(layers_ext));
auto packed = CreateRomFS(std::move(layered), std::move(layered_ext));
if (packed == nullptr) {
return;
}
LOG_INFO(Loader, " RomFS: LayeredFS patches applied successfully");
romfs = std::move(packed);
}
VirtualFile PatchManager::PatchRomFS(VirtualFile romfs, u64 ivfc_offset, ContentRecordType type,
VirtualFile update_raw) const {
const auto log_string = fmt::format("Patching RomFS for title_id={:016X}, type={:02X}",
title_id, static_cast<u8>(type));
if (type == ContentRecordType::Program || type == ContentRecordType::Data)
LOG_INFO(Loader, "{}", log_string);
else
LOG_DEBUG(Loader, "{}", log_string);
if (romfs == nullptr)
return romfs;
const auto installed = Service::FileSystem::GetUnionContents();
// Game Updates
const auto update_tid = GetUpdateTitleID(title_id);
const auto update = installed.GetEntryRaw(update_tid, type);
const auto& disabled = Settings::values.disabled_addons[title_id];
const auto update_disabled =
std::find(disabled.begin(), disabled.end(), "Update") != disabled.end();
if (!update_disabled && update != nullptr) {
const auto new_nca = std::make_shared<NCA>(update, romfs, ivfc_offset);
if (new_nca->GetStatus() == Loader::ResultStatus::Success &&
new_nca->GetRomFS() != nullptr) {
LOG_INFO(Loader, " RomFS: Update ({}) applied successfully",
FormatTitleVersion(installed.GetEntryVersion(update_tid).value_or(0)));
romfs = new_nca->GetRomFS();
}
} else if (!update_disabled && update_raw != nullptr) {
const auto new_nca = std::make_shared<NCA>(update_raw, romfs, ivfc_offset);
if (new_nca->GetStatus() == Loader::ResultStatus::Success &&
new_nca->GetRomFS() != nullptr) {
LOG_INFO(Loader, " RomFS: Update (PACKED) applied successfully");
romfs = new_nca->GetRomFS();
}
}
// LayeredFS
ApplyLayeredFS(romfs, title_id, type);
return romfs;
}
static void AppendCommaIfNotEmpty(std::string& to, const std::string& with) {
if (to.empty())
to += with;
else
to += ", " + with;
}
static bool IsDirValidAndNonEmpty(const VirtualDir& dir) {
return dir != nullptr && (!dir->GetFiles().empty() || !dir->GetSubdirectories().empty());
}
std::map<std::string, std::string, std::less<>> PatchManager::GetPatchVersionNames(
VirtualFile update_raw) const {
std::map<std::string, std::string, std::less<>> out;
const auto installed = Service::FileSystem::GetUnionContents();
const auto& disabled = Settings::values.disabled_addons[title_id];
// Game Updates
const auto update_tid = GetUpdateTitleID(title_id);
PatchManager update{update_tid};
auto [nacp, discard_icon_file] = update.GetControlMetadata();
const auto update_disabled =
std::find(disabled.begin(), disabled.end(), "Update") != disabled.end();
const auto update_label = update_disabled ? "[D] Update" : "Update";
if (nacp != nullptr) {
out.insert_or_assign(update_label, nacp->GetVersionString());
} else {
if (installed.HasEntry(update_tid, ContentRecordType::Program)) {
const auto meta_ver = installed.GetEntryVersion(update_tid);
if (meta_ver.value_or(0) == 0) {
out.insert_or_assign(update_label, "");
} else {
out.insert_or_assign(
update_label, FormatTitleVersion(*meta_ver, TitleVersionFormat::ThreeElements));
}
} else if (update_raw != nullptr) {
out.insert_or_assign(update_label, "PACKED");
}
}
// General Mods (LayeredFS and IPS)
const auto mod_dir = Service::FileSystem::GetModificationLoadRoot(title_id);
if (mod_dir != nullptr && mod_dir->GetSize() > 0) {
for (const auto& mod : mod_dir->GetSubdirectories()) {
std::string types;
const auto exefs_dir = mod->GetSubdirectory("exefs");
if (IsDirValidAndNonEmpty(exefs_dir)) {
bool ips = false;
bool ipswitch = false;
bool layeredfs = false;
for (const auto& file : exefs_dir->GetFiles()) {
if (file->GetExtension() == "ips") {
ips = true;
} else if (file->GetExtension() == "pchtxt") {
ipswitch = true;
} else if (std::find(EXEFS_FILE_NAMES.begin(), EXEFS_FILE_NAMES.end(),
file->GetName()) != EXEFS_FILE_NAMES.end()) {
layeredfs = true;
}
}
if (ips)
AppendCommaIfNotEmpty(types, "IPS");
if (ipswitch)
AppendCommaIfNotEmpty(types, "IPSwitch");
if (layeredfs)
AppendCommaIfNotEmpty(types, "LayeredExeFS");
}
if (IsDirValidAndNonEmpty(mod->GetSubdirectory("romfs")))
AppendCommaIfNotEmpty(types, "LayeredFS");
if (types.empty())
continue;
const auto mod_disabled =
std::find(disabled.begin(), disabled.end(), mod->GetName()) != disabled.end();
out.insert_or_assign(mod_disabled ? "[D] " + mod->GetName() : mod->GetName(), types);
}
}
// DLC
const auto dlc_entries = installed.ListEntriesFilter(TitleType::AOC, ContentRecordType::Data);
std::vector<RegisteredCacheEntry> dlc_match;
dlc_match.reserve(dlc_entries.size());
std::copy_if(dlc_entries.begin(), dlc_entries.end(), std::back_inserter(dlc_match),
[this, &installed](const RegisteredCacheEntry& entry) {
return (entry.title_id & DLC_BASE_TITLE_ID_MASK) == title_id &&
installed.GetEntry(entry)->GetStatus() == Loader::ResultStatus::Success;
});
if (!dlc_match.empty()) {
// Ensure sorted so DLC IDs show in order.
std::sort(dlc_match.begin(), dlc_match.end());
std::string list;
for (size_t i = 0; i < dlc_match.size() - 1; ++i)
list += fmt::format("{}, ", dlc_match[i].title_id & 0x7FF);
list += fmt::format("{}", dlc_match.back().title_id & 0x7FF);
const auto dlc_disabled =
std::find(disabled.begin(), disabled.end(), "DLC") != disabled.end();
out.insert_or_assign(dlc_disabled ? "[D] DLC" : "DLC", std::move(list));
}
return out;
}
std::pair<std::unique_ptr<NACP>, VirtualFile> PatchManager::GetControlMetadata() const {
const auto installed{Service::FileSystem::GetUnionContents()};
const auto base_control_nca = installed.GetEntry(title_id, ContentRecordType::Control);
if (base_control_nca == nullptr)
return {};
return ParseControlNCA(*base_control_nca);
}
std::pair<std::unique_ptr<NACP>, VirtualFile> PatchManager::ParseControlNCA(const NCA& nca) const {
const auto base_romfs = nca.GetRomFS();
if (base_romfs == nullptr)
return {};
const auto romfs = PatchRomFS(base_romfs, nca.GetBaseIVFCOffset(), ContentRecordType::Control);
if (romfs == nullptr)
return {};
const auto extracted = ExtractRomFS(romfs);
if (extracted == nullptr)
return {};
auto nacp_file = extracted->GetFile("control.nacp");
if (nacp_file == nullptr)
nacp_file = extracted->GetFile("Control.nacp");
auto nacp = nacp_file == nullptr ? nullptr : std::make_unique<NACP>(nacp_file);
VirtualFile icon_file;
for (const auto& language : FileSys::LANGUAGE_NAMES) {
icon_file = extracted->GetFile("icon_" + std::string(language) + ".dat");
if (icon_file != nullptr)
break;
}
return {std::move(nacp), icon_file};
}
} // namespace FileSys
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