// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include <utility>
#include <vector>
#include "common/common_funcs.h"
#include "common/common_types.h"
#include "common/logging/log.h"
#include "common/settings.h"
#include "common/swap.h"
#include "core/core.h"
#include "core/file_sys/control_metadata.h"
#include "core/file_sys/romfs_factory.h"
#include "core/file_sys/vfs_offset.h"
#include "core/hle/kernel/code_set.h"
#include "core/hle/kernel/k_page_table.h"
#include "core/hle/kernel/k_process.h"
#include "core/hle/kernel/k_thread.h"
#include "core/hle/service/filesystem/filesystem.h"
#include "core/loader/nro.h"
#include "core/loader/nso.h"
#include "core/memory.h"
namespace Loader {
struct NroSegmentHeader {
u32_le offset;
u32_le size;
};
static_assert(sizeof(NroSegmentHeader) == 0x8, "NroSegmentHeader has incorrect size.");
struct NroHeader {
INSERT_PADDING_BYTES(0x4);
u32_le module_header_offset;
u32 magic_ext1;
u32 magic_ext2;
u32_le magic;
INSERT_PADDING_BYTES(0x4);
u32_le file_size;
INSERT_PADDING_BYTES(0x4);
std::array<NroSegmentHeader, 3> segments; // Text, RoData, Data (in that order)
u32_le bss_size;
INSERT_PADDING_BYTES(0x44);
};
static_assert(sizeof(NroHeader) == 0x80, "NroHeader has incorrect size.");
struct ModHeader {
u32_le magic;
u32_le dynamic_offset;
u32_le bss_start_offset;
u32_le bss_end_offset;
u32_le unwind_start_offset;
u32_le unwind_end_offset;
u32_le module_offset; // Offset to runtime-generated module object. typically equal to .bss base
};
static_assert(sizeof(ModHeader) == 0x1c, "ModHeader has incorrect size.");
struct AssetSection {
u64_le offset;
u64_le size;
};
static_assert(sizeof(AssetSection) == 0x10, "AssetSection has incorrect size.");
struct AssetHeader {
u32_le magic;
u32_le format_version;
AssetSection icon;
AssetSection nacp;
AssetSection romfs;
};
static_assert(sizeof(AssetHeader) == 0x38, "AssetHeader has incorrect size.");
AppLoader_NRO::AppLoader_NRO(FileSys::VirtualFile file_) : AppLoader(std::move(file_)) {
NroHeader nro_header{};
if (file->ReadObject(&nro_header) != sizeof(NroHeader)) {
return;
}
if (file->GetSize() >= nro_header.file_size + sizeof(AssetHeader)) {
const u64 offset = nro_header.file_size;
AssetHeader asset_header{};
if (file->ReadObject(&asset_header, offset) != sizeof(AssetHeader)) {
return;
}
if (asset_header.format_version != 0) {
LOG_WARNING(Loader,
"NRO Asset Header has format {}, currently supported format is 0. If "
"strange glitches occur with metadata, check NRO assets.",
asset_header.format_version);
}
if (asset_header.magic != Common::MakeMagic('A', 'S', 'E', 'T')) {
return;
}
if (asset_header.nacp.size > 0) {
nacp = std::make_unique<FileSys::NACP>(std::make_shared<FileSys::OffsetVfsFile>(
file, asset_header.nacp.size, offset + asset_header.nacp.offset, "Control.nacp"));
}
if (asset_header.romfs.size > 0) {
romfs = std::make_shared<FileSys::OffsetVfsFile>(
file, asset_header.romfs.size, offset + asset_header.romfs.offset, "game.romfs");
}
if (asset_header.icon.size > 0) {
icon_data = file->ReadBytes(asset_header.icon.size, offset + asset_header.icon.offset);
}
}
}
AppLoader_NRO::~AppLoader_NRO() = default;
FileType AppLoader_NRO::IdentifyType(const FileSys::VirtualFile& nro_file) {
// Read NSO header
NroHeader nro_header{};
if (sizeof(NroHeader) != nro_file->ReadObject(&nro_header)) {
return FileType::Error;
}
if (nro_header.magic == Common::MakeMagic('N', 'R', 'O', '0')) {
return FileType::NRO;
}
return FileType::Error;
}
bool AppLoader_NRO::IsHomebrew() {
// Read NSO header
NroHeader nro_header{};
if (sizeof(NroHeader) != file->ReadObject(&nro_header)) {
return false;
}
return nro_header.magic_ext1 == Common::MakeMagic('H', 'O', 'M', 'E') &&
nro_header.magic_ext2 == Common::MakeMagic('B', 'R', 'E', 'W');
}
static constexpr u32 PageAlignSize(u32 size) {
return static_cast<u32>((size + Core::Memory::YUZU_PAGEMASK) & ~Core::Memory::YUZU_PAGEMASK);
}
static bool LoadNroImpl(Kernel::KProcess& process, const std::vector<u8>& data) {
if (data.size() < sizeof(NroHeader)) {
return {};
}
// Read NSO header
NroHeader nro_header{};
std::memcpy(&nro_header, data.data(), sizeof(NroHeader));
if (nro_header.magic != Common::MakeMagic('N', 'R', 'O', '0')) {
return {};
}
// Build program image
Kernel::PhysicalMemory program_image(PageAlignSize(nro_header.file_size));
std::memcpy(program_image.data(), data.data(), program_image.size());
if (program_image.size() != PageAlignSize(nro_header.file_size)) {
return {};
}
Kernel::CodeSet codeset;
for (std::size_t i = 0; i < nro_header.segments.size(); ++i) {
codeset.segments[i].addr = nro_header.segments[i].offset;
codeset.segments[i].offset = nro_header.segments[i].offset;
codeset.segments[i].size = PageAlignSize(nro_header.segments[i].size);
}
if (!Settings::values.program_args.GetValue().empty()) {
const auto arg_data = Settings::values.program_args.GetValue();
codeset.DataSegment().size += NSO_ARGUMENT_DATA_ALLOCATION_SIZE;
NSOArgumentHeader args_header{
NSO_ARGUMENT_DATA_ALLOCATION_SIZE, static_cast<u32_le>(arg_data.size()), {}};
const auto end_offset = program_image.size();
program_image.resize(static_cast<u32>(program_image.size()) +
NSO_ARGUMENT_DATA_ALLOCATION_SIZE);
std::memcpy(program_image.data() + end_offset, &args_header, sizeof(NSOArgumentHeader));
std::memcpy(program_image.data() + end_offset + sizeof(NSOArgumentHeader), arg_data.data(),
arg_data.size());
}
// Default .bss to NRO header bss size if MOD0 section doesn't exist
u32 bss_size{PageAlignSize(nro_header.bss_size)};
// Read MOD header
ModHeader mod_header{};
std::memcpy(&mod_header, program_image.data() + nro_header.module_header_offset,
sizeof(ModHeader));
const bool has_mod_header{mod_header.magic == Common::MakeMagic('M', 'O', 'D', '0')};
if (has_mod_header) {
// Resize program image to include .bss section and page align each section
bss_size = PageAlignSize(mod_header.bss_end_offset - mod_header.bss_start_offset);
}
codeset.DataSegment().size += bss_size;
program_image.resize(static_cast<u32>(program_image.size()) + bss_size);
// Setup the process code layout
if (process
.LoadFromMetadata(FileSys::ProgramMetadata::GetDefault(), program_image.size(), 0,
false)
.IsError()) {
return false;
}
// Load codeset for current process
codeset.memory = std::move(program_image);
process.LoadModule(std::move(codeset), process.GetEntryPoint());
return true;
}
bool AppLoader_NRO::LoadNro(Kernel::KProcess& process, const FileSys::VfsFile& nro_file) {
return LoadNroImpl(process, nro_file.ReadAllBytes());
}
AppLoader_NRO::LoadResult AppLoader_NRO::Load(Kernel::KProcess& process, Core::System& system) {
if (is_loaded) {
return {ResultStatus::ErrorAlreadyLoaded, {}};
}
if (!LoadNro(process, *file)) {
return {ResultStatus::ErrorLoadingNRO, {}};
}
if (romfs != nullptr) {
system.GetFileSystemController().RegisterRomFS(std::make_unique<FileSys::RomFSFactory>(
*this, system.GetContentProvider(), system.GetFileSystemController()));
}
is_loaded = true;
return {ResultStatus::Success, LoadParameters{Kernel::KThread::DefaultThreadPriority,
Core::Memory::DEFAULT_STACK_SIZE}};
}
ResultStatus AppLoader_NRO::ReadIcon(std::vector<u8>& buffer) {
if (icon_data.empty()) {
return ResultStatus::ErrorNoIcon;
}
buffer = icon_data;
return ResultStatus::Success;
}
ResultStatus AppLoader_NRO::ReadProgramId(u64& out_program_id) {
if (nacp == nullptr) {
return ResultStatus::ErrorNoControl;
}
out_program_id = nacp->GetTitleId();
return ResultStatus::Success;
}
ResultStatus AppLoader_NRO::ReadRomFS(FileSys::VirtualFile& dir) {
if (romfs == nullptr) {
return ResultStatus::ErrorNoRomFS;
}
dir = romfs;
return ResultStatus::Success;
}
ResultStatus AppLoader_NRO::ReadTitle(std::string& title) {
if (nacp == nullptr) {
return ResultStatus::ErrorNoControl;
}
title = nacp->GetApplicationName();
return ResultStatus::Success;
}
ResultStatus AppLoader_NRO::ReadControlData(FileSys::NACP& control) {
if (nacp == nullptr) {
return ResultStatus::ErrorNoControl;
}
control = *nacp;
return ResultStatus::Success;
}
bool AppLoader_NRO::IsRomFSUpdatable() const {
return false;
}
} // namespace Loader