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// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <utility>
#include <vector>
#include "common/common_funcs.h"
#include "common/common_types.h"
#include "common/file_util.h"
#include "common/logging/log.h"
#include "common/swap.h"
#include "core/core.h"
#include "core/file_sys/control_metadata.h"
#include "core/file_sys/vfs_offset.h"
#include "core/gdbstub/gdbstub.h"
#include "core/hle/kernel/process.h"
#include "core/hle/kernel/resource_limit.h"
#include "core/loader/nro.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;
INSERT_PADDING_BYTES(0x8);
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(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& file) {
// Read NSO header
NroHeader nro_header{};
if (sizeof(NroHeader) != file->ReadObject(&nro_header)) {
return FileType::Error;
}
if (nro_header.magic == Common::MakeMagic('N', 'R', 'O', '0')) {
return FileType::NRO;
}
return FileType::Error;
}
static constexpr u32 PageAlignSize(u32 size) {
return (size + Memory::PAGE_MASK) & ~Memory::PAGE_MASK;
}
bool AppLoader_NRO::LoadNro(FileSys::VirtualFile file, VAddr load_base) {
// Read NSO header
NroHeader nro_header{};
if (sizeof(NroHeader) != file->ReadObject(&nro_header)) {
return {};
}
if (nro_header.magic != Common::MakeMagic('N', 'R', 'O', '0')) {
return {};
}
// Build program image
Kernel::SharedPtr<Kernel::CodeSet> codeset = Kernel::CodeSet::Create("");
std::vector<u8> program_image = file->ReadBytes(PageAlignSize(nro_header.file_size));
if (program_image.size() != PageAlignSize(nro_header.file_size)) {
return {};
}
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);
}
// Read MOD header
ModHeader mod_header{};
// Default .bss to NRO header bss size if MOD0 section doesn't exist
u32 bss_size{PageAlignSize(nro_header.bss_size)};
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);
// Load codeset for current process
codeset->name = file->GetName();
codeset->memory = std::make_shared<std::vector<u8>>(std::move(program_image));
Core::CurrentProcess()->LoadModule(codeset, load_base);
// Register module with GDBStub
GDBStub::RegisterModule(codeset->name, load_base, load_base);
return true;
}
ResultStatus AppLoader_NRO::Load(Kernel::SharedPtr<Kernel::Process>& process) {
if (is_loaded) {
return ResultStatus::ErrorAlreadyLoaded;
}
// Load NRO
static constexpr VAddr base_addr{Memory::PROCESS_IMAGE_VADDR};
if (!LoadNro(file, base_addr)) {
return ResultStatus::ErrorLoadingNRO;
}
process->svc_access_mask.set();
process->address_mappings = default_address_mappings;
process->resource_limit =
Kernel::ResourceLimit::GetForCategory(Kernel::ResourceLimitCategory::APPLICATION);
process->Run(base_addr, THREADPRIO_DEFAULT, Memory::DEFAULT_STACK_SIZE);
is_loaded = true;
return ResultStatus::Success;
}
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;
}
} // namespace Loader
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