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https://github.com/yuzu-emu/yuzu.git
synced 2024-08-23 20:07:19 +02:00
patch_manager: Add PatchNSO function
While PatchExeFS operated on the entire directory, this function operates on the uncompressed NSO. Avoids copying decompression code to PatchManager.
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parent
4c2a94fa94
commit
42fb4e82d3
@ -34,6 +34,8 @@ add_library(core STATIC
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file_sys/errors.h
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file_sys/fsmitm_romfsbuild.cpp
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file_sys/fsmitm_romfsbuild.h
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file_sys/ips_layer.cpp
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file_sys/ips_layer.h
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file_sys/mode.h
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file_sys/nca_metadata.cpp
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file_sys/nca_metadata.h
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@ -6,13 +6,16 @@
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#include <array>
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#include <cstddef>
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#include "common/hex_util.h"
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#include "common/logging/log.h"
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#include "core/file_sys/content_archive.h"
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#include "core/file_sys/control_metadata.h"
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#include "core/file_sys/ips_layer.h"
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#include "core/file_sys/patch_manager.h"
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#include "core/file_sys/registered_cache.h"
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#include "core/file_sys/romfs.h"
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#include "core/file_sys/vfs_layered.h"
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#include "core/file_sys/vfs_vector.h"
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#include "core/hle/service/filesystem/filesystem.h"
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#include "core/loader/loader.h"
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@ -21,6 +24,14 @@ namespace FileSys {
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constexpr u64 SINGLE_BYTE_MODULUS = 0x100;
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constexpr u64 DLC_BASE_TITLE_ID_MASK = 0xFFFFFFFFFFFFE000;
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struct NSOBuildHeader {
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u32_le magic;
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INSERT_PADDING_BYTES(0x3C);
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std::array<u8, 0x20> build_id;
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INSERT_PADDING_BYTES(0xA0);
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};
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static_assert(sizeof(NSOBuildHeader) == 0x100, "NSOBuildHeader has incorrect size.");
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std::string FormatTitleVersion(u32 version, TitleVersionFormat format) {
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std::array<u8, sizeof(u32)> bytes{};
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bytes[0] = version % SINGLE_BYTE_MODULUS;
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@ -61,6 +72,89 @@ VirtualDir PatchManager::PatchExeFS(VirtualDir exefs) const {
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return exefs;
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}
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std::vector<u8> PatchManager::PatchNSO(const std::vector<u8>& nso) const {
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if (nso.size() < 0x100)
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return nso;
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NSOBuildHeader header{};
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std::memcpy(&header, nso.data(), sizeof(NSOBuildHeader));
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if (header.magic != Common::MakeMagic('N', 'S', 'O', '0'))
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return nso;
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const auto build_id_raw = Common::HexArrayToString(header.build_id);
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const auto build_id = build_id_raw.substr(0, build_id_raw.find_last_not_of('0') + 1);
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LOG_INFO(Loader, "Patching NSO for build_id={}", build_id);
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const auto load_dir = Service::FileSystem::GetModificationLoadRoot(title_id);
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auto patch_dirs = load_dir->GetSubdirectories();
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std::sort(patch_dirs.begin(), patch_dirs.end(),
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[](const VirtualDir& l, const VirtualDir& r) { return l->GetName() < r->GetName(); });
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std::vector<VirtualFile> ips;
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ips.reserve(patch_dirs.size() - 1);
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for (const auto& subdir : patch_dirs) {
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auto exefs_dir = subdir->GetSubdirectory("exefs");
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if (exefs_dir != nullptr) {
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for (const auto& file : exefs_dir->GetFiles()) {
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if (file->GetExtension() != "ips")
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continue;
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auto name = file->GetName();
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const auto p1 = name.substr(0, name.find_first_of('.'));
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const auto this_build_id = p1.substr(0, p1.find_last_not_of('0') + 1);
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if (build_id == this_build_id)
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ips.push_back(file);
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}
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}
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}
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auto out = nso;
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for (const auto& ips_file : ips) {
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LOG_INFO(Loader, " - Appling IPS patch from mod \"{}\"",
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ips_file->GetContainingDirectory()->GetParentDirectory()->GetName());
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const auto patched = PatchIPS(std::make_shared<VectorVfsFile>(out), ips_file);
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if (patched != nullptr)
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out = patched->ReadAllBytes();
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}
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if (out.size() < 0x100)
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return nso;
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std::memcpy(out.data(), &header, sizeof(NSOBuildHeader));
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return out;
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}
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bool PatchManager::HasNSOPatch(const std::array<u8, 32>& build_id_) const {
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const auto build_id_raw = Common::HexArrayToString(build_id_);
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const auto build_id = build_id_raw.substr(0, build_id_raw.find_last_not_of('0') + 1);
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LOG_INFO(Loader, "Querying NSO patch existence for build_id={}", build_id);
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const auto load_dir = Service::FileSystem::GetModificationLoadRoot(title_id);
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auto patch_dirs = load_dir->GetSubdirectories();
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std::sort(patch_dirs.begin(), patch_dirs.end(),
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[](const VirtualDir& l, const VirtualDir& r) { return l->GetName() < r->GetName(); });
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for (const auto& subdir : patch_dirs) {
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auto exefs_dir = subdir->GetSubdirectory("exefs");
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if (exefs_dir != nullptr) {
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for (const auto& file : exefs_dir->GetFiles()) {
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if (file->GetExtension() != "ips")
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continue;
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auto name = file->GetName();
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const auto p1 = name.substr(0, name.find_first_of('.'));
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const auto this_build_id = p1.substr(0, p1.find_last_not_of('0') + 1);
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if (build_id == this_build_id)
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return true;
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}
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}
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}
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return false;
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}
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static void ApplyLayeredFS(VirtualFile& romfs, u64 title_id, ContentRecordType type) {
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const auto load_dir = Service::FileSystem::GetModificationLoadRoot(title_id);
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if (type != ContentRecordType::Program || load_dir == nullptr || load_dir->GetSize() <= 0) {
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@ -34,6 +34,14 @@ public:
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// - Game Updates
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VirtualDir PatchExeFS(VirtualDir exefs) const;
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// Currently tracked NSO patches:
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// - IPS
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std::vector<u8> PatchNSO(const std::vector<u8>& nso) const;
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// Checks to see if PatchNSO() will have any effect given the NSO's build ID.
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// Used to prevent expensive copies in NSO loader.
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bool HasNSOPatch(const std::array<u8, 0x20>& build_id) const;
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// Currently tracked RomFS patches:
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// - Game Updates
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// - LayeredFS
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