1cf90f4570
This source file was utilizing its own version of the NSO header. Instead of keeping this around, we can have the patch manager also use the version of the header that we have defined in loader/nso.h
188 lines
7.2 KiB
C++
188 lines
7.2 KiB
C++
// 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 <vector>
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#include <lz4.h>
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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/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/gdbstub/gdbstub.h"
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#include "core/hle/kernel/code_set.h"
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#include "core/hle/kernel/process.h"
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#include "core/hle/kernel/vm_manager.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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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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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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static 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(header.size);
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const int bytes_uncompressed =
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LZ4_decompress_safe(reinterpret_cast<const char*>(compressed_data.data()),
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reinterpret_cast<char*>(uncompressed_data.data()),
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static_cast<int>(compressed_data.size()), header.size);
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ASSERT_MSG(bytes_uncompressed == static_cast<int>(header.size) &&
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bytes_uncompressed == static_cast<int>(uncompressed_data.size()),
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"{} != {} != {}", bytes_uncompressed, header.size, uncompressed_data.size());
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return uncompressed_data;
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}
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static constexpr u32 PageAlignSize(u32 size) {
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return (size + Memory::PAGE_MASK) & ~Memory::PAGE_MASK;
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}
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std::optional<VAddr> AppLoader_NSO::LoadModule(Kernel::Process& process,
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const FileSys::VfsFile& file, VAddr load_base,
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bool should_pass_arguments,
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std::optional<FileSys::PatchManager> pm) {
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if (file.GetSize() < sizeof(NSOHeader)) {
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return {};
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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 {};
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}
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if (nso_header.magic != Common::MakeMagic('N', 'S', 'O', '0')) {
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return {};
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}
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// Build program image
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Kernel::CodeSet codeset;
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std::vector<u8> 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);
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program_image.insert(program_image.end(), data.begin(), data.end());
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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 = PageAlignSize(static_cast<u32>(data.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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// MOD header pointer is at .text offset + 4
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u32 module_offset;
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std::memcpy(&module_offset, program_image.data() + 4, sizeof(u32));
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// Read MOD header
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MODHeader mod_header{};
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// Default .bss to size in segment header if MOD0 section doesn't exist
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u32 bss_size{PageAlignSize(nso_header.segments[2].bss_size)};
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std::memcpy(&mod_header, program_image.data() + module_offset, sizeof(MODHeader));
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const bool has_mod_header{mod_header.magic == Common::MakeMagic('M', 'O', 'D', '0')};
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if (has_mod_header) {
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// Resize program image to include .bss section and page align each section
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bss_size = PageAlignSize(mod_header.bss_end_offset - mod_header.bss_start_offset);
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}
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codeset.DataSegment().size += bss_size;
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const u32 image_size{PageAlignSize(static_cast<u32>(program_image.size()) + bss_size)};
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program_image.resize(image_size);
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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(program_image.size() + 0x100);
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std::memcpy(pi_header.data(), &nso_header, sizeof(NSOHeader));
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std::memcpy(pi_header.data() + 0x100, program_image.data(), program_image.size());
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pi_header = pm->PatchNSO(pi_header);
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std::memcpy(program_image.data(), pi_header.data() + 0x100, program_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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const auto cheats = pm->CreateCheatList(nso_header.build_id);
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if (!cheats.empty()) {
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Core::System::GetInstance().RegisterCheatList(
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cheats, Common::HexArrayToString(nso_header.build_id), load_base,
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load_base + program_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::make_shared<std::vector<u8>>(std::move(program_image));
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process.LoadModule(std::move(codeset), load_base);
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// Register module with GDBStub
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GDBStub::RegisterModule(file.GetName(), load_base, load_base);
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return load_base + image_size;
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}
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ResultStatus AppLoader_NSO::Load(Kernel::Process& process) {
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if (is_loaded) {
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return ResultStatus::ErrorAlreadyLoaded;
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}
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// Load module
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const VAddr base_address = process.VMManager().GetCodeRegionBaseAddress();
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if (!LoadModule(process, *file, base_address, true)) {
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return ResultStatus::ErrorLoadingNSO;
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}
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LOG_DEBUG(Loader, "loaded module {} @ 0x{:X}", file->GetName(), base_address);
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process.Run(base_address, Kernel::THREADPRIO_DEFAULT, Memory::DEFAULT_STACK_SIZE);
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is_loaded = true;
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return ResultStatus::Success;
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}
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} // namespace Loader
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