early-access version 1255
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pineappleEA
191
src/core/loader/nso.cpp
Executable file
191
src/core/loader/nso.cpp
Executable file
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// Copyright 2018 yuzu emulator team
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <cinttypes>
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#include <cstring>
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#include <vector>
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#include "common/common_funcs.h"
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#include "common/file_util.h"
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#include "common/hex_util.h"
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#include "common/logging/log.h"
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#include "common/lz4_compression.h"
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#include "common/swap.h"
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#include "core/core.h"
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#include "core/file_sys/patch_manager.h"
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#include "core/hle/kernel/code_set.h"
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#include "core/hle/kernel/memory/page_table.h"
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#include "core/hle/kernel/process.h"
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#include "core/hle/kernel/thread.h"
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#include "core/loader/nso.h"
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#include "core/memory.h"
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#include "core/settings.h"
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namespace Loader {
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namespace {
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struct MODHeader {
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u32_le magic;
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u32_le dynamic_offset;
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u32_le bss_start_offset;
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u32_le bss_end_offset;
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u32_le eh_frame_hdr_start_offset;
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u32_le eh_frame_hdr_end_offset;
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u32_le module_offset; // Offset to runtime-generated module object. typically equal to .bss base
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};
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static_assert(sizeof(MODHeader) == 0x1c, "MODHeader has incorrect size.");
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std::vector<u8> DecompressSegment(const std::vector<u8>& compressed_data,
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const NSOSegmentHeader& header) {
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std::vector<u8> uncompressed_data =
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Common::Compression::DecompressDataLZ4(compressed_data, header.size);
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ASSERT_MSG(uncompressed_data.size() == header.size, "{} != {}", header.size,
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uncompressed_data.size());
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return uncompressed_data;
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}
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constexpr u32 PageAlignSize(u32 size) {
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return static_cast<u32>((size + Core::Memory::PAGE_MASK) & ~Core::Memory::PAGE_MASK);
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}
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} // Anonymous namespace
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bool NSOHeader::IsSegmentCompressed(size_t segment_num) const {
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ASSERT_MSG(segment_num < 3, "Invalid segment {}", segment_num);
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return ((flags >> segment_num) & 1) != 0;
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}
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AppLoader_NSO::AppLoader_NSO(FileSys::VirtualFile file) : AppLoader(std::move(file)) {}
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FileType AppLoader_NSO::IdentifyType(const FileSys::VirtualFile& file) {
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u32 magic = 0;
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if (file->ReadObject(&magic) != sizeof(magic)) {
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return FileType::Error;
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}
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if (Common::MakeMagic('N', 'S', 'O', '0') != magic) {
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return FileType::Error;
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}
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return FileType::NSO;
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}
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std::optional<VAddr> AppLoader_NSO::LoadModule(Kernel::Process& process, Core::System& system,
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const FileSys::VfsFile& file, VAddr load_base,
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bool should_pass_arguments, bool load_into_process,
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std::optional<FileSys::PatchManager> pm) {
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if (file.GetSize() < sizeof(NSOHeader)) {
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return std::nullopt;
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}
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NSOHeader nso_header{};
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if (sizeof(NSOHeader) != file.ReadObject(&nso_header)) {
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return std::nullopt;
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}
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if (nso_header.magic != Common::MakeMagic('N', 'S', 'O', '0')) {
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return std::nullopt;
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}
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// Build program image
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Kernel::CodeSet codeset;
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Kernel::PhysicalMemory program_image;
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for (std::size_t i = 0; i < nso_header.segments.size(); ++i) {
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std::vector<u8> data =
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file.ReadBytes(nso_header.segments_compressed_size[i], nso_header.segments[i].offset);
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if (nso_header.IsSegmentCompressed(i)) {
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data = DecompressSegment(data, nso_header.segments[i]);
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}
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program_image.resize(nso_header.segments[i].location + static_cast<u32>(data.size()));
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std::memcpy(program_image.data() + nso_header.segments[i].location, data.data(),
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data.size());
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codeset.segments[i].addr = nso_header.segments[i].location;
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codeset.segments[i].offset = nso_header.segments[i].location;
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codeset.segments[i].size = nso_header.segments[i].size;
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}
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if (should_pass_arguments && !Settings::values.program_args.empty()) {
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const auto arg_data{Settings::values.program_args};
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codeset.DataSegment().size += NSO_ARGUMENT_DATA_ALLOCATION_SIZE;
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NSOArgumentHeader args_header{
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NSO_ARGUMENT_DATA_ALLOCATION_SIZE, static_cast<u32_le>(arg_data.size()), {}};
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const auto end_offset = program_image.size();
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program_image.resize(static_cast<u32>(program_image.size()) +
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NSO_ARGUMENT_DATA_ALLOCATION_SIZE);
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std::memcpy(program_image.data() + end_offset, &args_header, sizeof(NSOArgumentHeader));
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std::memcpy(program_image.data() + end_offset + sizeof(NSOArgumentHeader), arg_data.data(),
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arg_data.size());
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}
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codeset.DataSegment().size += nso_header.segments[2].bss_size;
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const u32 image_size{
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PageAlignSize(static_cast<u32>(program_image.size()) + nso_header.segments[2].bss_size)};
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program_image.resize(image_size);
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for (std::size_t i = 0; i < nso_header.segments.size(); ++i) {
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codeset.segments[i].size = PageAlignSize(codeset.segments[i].size);
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}
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// Apply patches if necessary
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if (pm && (pm->HasNSOPatch(nso_header.build_id) || Settings::values.dump_nso)) {
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std::vector<u8> pi_header;
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pi_header.insert(pi_header.begin(), reinterpret_cast<u8*>(&nso_header),
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reinterpret_cast<u8*>(&nso_header) + sizeof(NSOHeader));
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pi_header.insert(pi_header.begin() + sizeof(NSOHeader), program_image.data(),
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program_image.data() + program_image.size());
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pi_header = pm->PatchNSO(pi_header, file.GetName());
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std::copy(pi_header.begin() + sizeof(NSOHeader), pi_header.end(), program_image.data());
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}
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// If we aren't actually loading (i.e. just computing the process code layout), we are done
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if (!load_into_process) {
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return load_base + image_size;
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}
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// Apply cheats if they exist and the program has a valid title ID
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if (pm) {
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system.SetCurrentProcessBuildID(nso_header.build_id);
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const auto cheats = pm->CreateCheatList(nso_header.build_id);
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if (!cheats.empty()) {
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system.RegisterCheatList(cheats, nso_header.build_id, load_base, image_size);
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}
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}
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// Load codeset for current process
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codeset.memory = std::move(program_image);
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process.LoadModule(std::move(codeset), load_base);
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return load_base + image_size;
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}
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AppLoader_NSO::LoadResult AppLoader_NSO::Load(Kernel::Process& process, Core::System& system) {
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if (is_loaded) {
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return {ResultStatus::ErrorAlreadyLoaded, {}};
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}
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modules.clear();
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// Load module
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const VAddr base_address = process.PageTable().GetCodeRegionStart();
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if (!LoadModule(process, system, *file, base_address, true, true)) {
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return {ResultStatus::ErrorLoadingNSO, {}};
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}
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modules.insert_or_assign(base_address, file->GetName());
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LOG_DEBUG(Loader, "loaded module {} @ 0x{:X}", file->GetName(), base_address);
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is_loaded = true;
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return {ResultStatus::Success,
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LoadParameters{Kernel::THREADPRIO_DEFAULT, Core::Memory::DEFAULT_STACK_SIZE}};
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}
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ResultStatus AppLoader_NSO::ReadNSOModules(Modules& modules) {
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modules = this->modules;
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return ResultStatus::Success;
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}
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} // namespace Loader
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