mirror of
https://git.suyu.dev/suyu/suyu.git
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77c684c114
* Add VfsFile and VfsDirectory classes * Finish abstract Vfs classes * Implement RealVfsFile (computer fs backend) * Finish RealVfsFile and RealVfsDirectory * Finished OffsetVfsFile * More changes * Fix import paths * Major refactor * Remove double const * Use experimental/filesystem or filesystem depending on compiler * Port partition_filesystem * More changes * More Overhaul * FSP_SRV fixes * Fixes and testing * Try to get filesystem to compile * Filesystem on linux * Remove std::filesystem and document/test * Compile fixes * Missing include * Bug fixes * Fixes * Rename v_file and v_dir * clang-format fix * Rename NGLOG_* to LOG_* * Most review changes * Fix TODO * Guess 'main' to be Directory by filename
171 lines
6.1 KiB
C++
171 lines
6.1 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/core.h"
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#include "core/hle/kernel/process.h"
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#include "core/hle/kernel/resource_limit.h"
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#include "core/loader/nso.h"
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#include "core/memory.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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INSERT_PADDING_BYTES(0xc);
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std::array<NsoSegmentHeader, 3> segments; // Text, RoData, Data (in that order)
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u32_le bss_size;
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INSERT_PADDING_BYTES(0x1c);
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std::array<u32_le, 3> segments_compressed_size;
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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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file->ReadObject(&magic);
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if (Common::MakeMagic('N', 'S', 'O', '0') == magic) {
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return FileType::NSO;
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}
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return FileType::Error;
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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;
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uncompressed_data.resize(header.size);
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const int bytes_uncompressed = LZ4_decompress_safe(
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reinterpret_cast<const char*>(compressed_data.data()),
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reinterpret_cast<char*>(uncompressed_data.data()), compressed_data.size(), header.size);
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ASSERT_MSG(bytes_uncompressed == header.size && bytes_uncompressed == 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 std::vector<u8> ReadSegment(FileUtil::IOFile& file, const NsoSegmentHeader& header,
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size_t compressed_size) {
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std::vector<u8> compressed_data;
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compressed_data.resize(compressed_size);
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file.Seek(header.offset, SEEK_SET);
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if (compressed_size != file.ReadBytes(compressed_data.data(), compressed_size)) {
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LOG_CRITICAL(Loader, "Failed to read {} NSO LZ4 compressed bytes", compressed_size);
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return {};
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}
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return DecompressSegment(compressed_data, header);
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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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VAddr AppLoader_NSO::LoadModule(FileSys::VirtualFile file, VAddr load_base) {
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if (file == nullptr)
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return {};
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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::SharedPtr<Kernel::CodeSet> codeset = Kernel::CodeSet::Create("");
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std::vector<u8> program_image;
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for (int i = 0; i < nso_header.segments.size(); ++i) {
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const std::vector<u8> compressed_data =
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file->ReadBytes(nso_header.segments_compressed_size[i], nso_header.segments[i].offset);
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std::vector<u8> data = DecompressSegment(compressed_data, nso_header.segments[i]);
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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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// 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->data.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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// Load codeset for current process
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codeset->name = file->GetName();
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codeset->memory = std::make_shared<std::vector<u8>>(std::move(program_image));
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Core::CurrentProcess()->LoadModule(codeset, load_base);
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return load_base + image_size;
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}
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ResultStatus AppLoader_NSO::Load(Kernel::SharedPtr<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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LoadModule(file, Memory::PROCESS_IMAGE_VADDR);
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LOG_DEBUG(Loader, "loaded module {} @ 0x{:X}", file->GetName(), Memory::PROCESS_IMAGE_VADDR);
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process->svc_access_mask.set();
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process->address_mappings = default_address_mappings;
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process->resource_limit =
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Kernel::ResourceLimit::GetForCategory(Kernel::ResourceLimitCategory::APPLICATION);
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process->Run(Memory::PROCESS_IMAGE_VADDR, 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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