2018-01-13 13:22:39 -08:00
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// Copyright 2018 yuzu emulator team
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2017-09-24 08:08:31 -07:00
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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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2018-02-13 21:57:06 -08:00
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#include <cinttypes>
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2017-09-24 08:08:31 -07:00
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#include <vector>
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#include <lz4.h>
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2017-10-14 21:11:38 -07:00
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#include "common/common_funcs.h"
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2018-01-20 12:48:37 -08:00
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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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2018-03-13 14:49:59 -07:00
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#include "core/core.h"
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2018-07-12 20:22:59 -07:00
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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/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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2018-01-16 09:14:36 -08:00
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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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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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2018-06-21 08:16:23 -07:00
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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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2018-07-18 18:07:11 -07:00
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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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2018-07-07 20:24:51 -07:00
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// Build program image
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auto& kernel = Core::System::GetInstance().Kernel();
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Kernel::SharedPtr<Kernel::CodeSet> codeset = Kernel::CodeSet::Create(kernel, "");
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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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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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2018-08-03 11:33:59 -07:00
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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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// 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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2018-07-12 20:22:59 -07:00
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// Register module with GDBStub
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GDBStub::RegisterModule(codeset->name, load_base, load_base);
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2018-07-07 20:24:51 -07:00
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return load_base + image_size;
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}
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2017-10-09 20:56:20 -07:00
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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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2018-01-20 11:20:04 -08:00
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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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2018-08-28 09:30:33 -07:00
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auto& kernel = Core::System::GetInstance().Kernel();
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process->svc_access_mask.set();
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process->resource_limit =
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kernel.ResourceLimitForCategory(Kernel::ResourceLimitCategory::APPLICATION);
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2018-04-20 15:41:11 -07:00
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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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