7695febfa1
Similar to the NRO changes, we can also pass the process explicitly as a parameter from Load instead of indirecting through the System class.
195 lines
7.4 KiB
C++
195 lines
7.4 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/logging/log.h"
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#include "common/swap.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/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 NsoSegmentHeader {
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u32_le offset;
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u32_le location;
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u32_le size;
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union {
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u32_le alignment;
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u32_le bss_size;
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};
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};
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static_assert(sizeof(NsoSegmentHeader) == 0x10, "NsoSegmentHeader has incorrect size.");
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struct NsoHeader {
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u32_le magic;
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u32_le version;
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INSERT_PADDING_WORDS(1);
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u8 flags;
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std::array<NsoSegmentHeader, 3> segments; // Text, RoData, Data (in that order)
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std::array<u8, 0x20> build_id;
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std::array<u32_le, 3> segments_compressed_size;
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bool 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);
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}
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};
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static_assert(sizeof(NsoHeader) == 0x6c, "NsoHeader has incorrect size.");
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static_assert(std::is_trivially_copyable_v<NsoHeader>, "NsoHeader isn't trivially copyable.");
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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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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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NsoHeader nso_header{};
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if (sizeof(NsoHeader) != file.ReadObject(&nso_header))
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return {};
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if (nso_header.magic != Common::MakeMagic('N', 'S', 'O', '0'))
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return {};
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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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// 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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