304 lines
10 KiB
C++
304 lines
10 KiB
C++
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// 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 <vector>
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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/file_sys/program_metadata.h"
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#include "core/file_sys/romfs_factory.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/hle/service/filesystem/filesystem.h"
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#include "core/loader/nca.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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// Media offsets in headers are stored divided by 512. Mult. by this to get real offset.
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constexpr u64 MEDIA_OFFSET_MULTIPLIER = 0x200;
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constexpr u64 SECTION_HEADER_SIZE = 0x200;
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constexpr u64 SECTION_HEADER_OFFSET = 0x400;
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enum class NcaContentType : u8 { Program = 0, Meta = 1, Control = 2, Manual = 3, Data = 4 };
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enum class NcaSectionFilesystemType : u8 { PFS0 = 0x2, ROMFS = 0x3 };
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struct NcaSectionTableEntry {
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u32_le media_offset;
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u32_le media_end_offset;
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INSERT_PADDING_BYTES(0x8);
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};
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static_assert(sizeof(NcaSectionTableEntry) == 0x10, "NcaSectionTableEntry has incorrect size.");
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struct NcaHeader {
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std::array<u8, 0x100> rsa_signature_1;
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std::array<u8, 0x100> rsa_signature_2;
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u32_le magic;
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u8 is_system;
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NcaContentType content_type;
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u8 crypto_type;
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u8 key_index;
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u64_le size;
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u64_le title_id;
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INSERT_PADDING_BYTES(0x4);
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u32_le sdk_version;
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u8 crypto_type_2;
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INSERT_PADDING_BYTES(15);
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std::array<u8, 0x10> rights_id;
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std::array<NcaSectionTableEntry, 0x4> section_tables;
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std::array<std::array<u8, 0x20>, 0x4> hash_tables;
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std::array<std::array<u8, 0x10>, 0x4> key_area;
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INSERT_PADDING_BYTES(0xC0);
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};
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static_assert(sizeof(NcaHeader) == 0x400, "NcaHeader has incorrect size.");
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struct NcaSectionHeaderBlock {
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INSERT_PADDING_BYTES(3);
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NcaSectionFilesystemType filesystem_type;
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u8 crypto_type;
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INSERT_PADDING_BYTES(3);
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};
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static_assert(sizeof(NcaSectionHeaderBlock) == 0x8, "NcaSectionHeaderBlock has incorrect size.");
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struct Pfs0Superblock {
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NcaSectionHeaderBlock header_block;
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std::array<u8, 0x20> hash;
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u32_le size;
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INSERT_PADDING_BYTES(4);
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u64_le hash_table_offset;
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u64_le hash_table_size;
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u64_le pfs0_header_offset;
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u64_le pfs0_size;
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INSERT_PADDING_BYTES(432);
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};
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static_assert(sizeof(Pfs0Superblock) == 0x200, "Pfs0Superblock has incorrect size.");
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static bool IsValidNca(const NcaHeader& header) {
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return header.magic == Common::MakeMagic('N', 'C', 'A', '2') ||
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header.magic == Common::MakeMagic('N', 'C', 'A', '3');
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}
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// TODO(DarkLordZach): Add support for encrypted.
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class Nca final {
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std::vector<FileSys::PartitionFilesystem> pfs;
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std::vector<u64> pfs_offset;
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u64 romfs_offset = 0;
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u64 romfs_size = 0;
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boost::optional<u8> exefs_id = boost::none;
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FileUtil::IOFile file;
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std::string path;
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u64 GetExeFsFileOffset(const std::string& file_name) const;
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u64 GetExeFsFileSize(const std::string& file_name) const;
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public:
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ResultStatus Load(FileUtil::IOFile&& file, std::string path);
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FileSys::PartitionFilesystem GetPfs(u8 id) const;
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u64 GetRomFsOffset() const;
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u64 GetRomFsSize() const;
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std::vector<u8> GetExeFsFile(const std::string& file_name);
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};
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static bool IsPfsExeFs(const FileSys::PartitionFilesystem& pfs) {
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// According to switchbrew, an exefs must only contain these two files:
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return pfs.GetFileSize("main") > 0 && pfs.GetFileSize("main.npdm") > 0;
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}
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ResultStatus Nca::Load(FileUtil::IOFile&& in_file, std::string in_path) {
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file = std::move(in_file);
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path = in_path;
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file.Seek(0, SEEK_SET);
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std::array<u8, sizeof(NcaHeader)> header_array{};
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if (sizeof(NcaHeader) != file.ReadBytes(header_array.data(), sizeof(NcaHeader)))
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NGLOG_CRITICAL(Loader, "File reader errored out during header read.");
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NcaHeader header{};
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std::memcpy(&header, header_array.data(), sizeof(NcaHeader));
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if (!IsValidNca(header))
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return ResultStatus::ErrorInvalidFormat;
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int number_sections =
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std::count_if(std::begin(header.section_tables), std::end(header.section_tables),
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[](NcaSectionTableEntry entry) { return entry.media_offset > 0; });
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for (int i = 0; i < number_sections; ++i) {
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// Seek to beginning of this section.
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file.Seek(SECTION_HEADER_OFFSET + i * SECTION_HEADER_SIZE, SEEK_SET);
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std::array<u8, sizeof(NcaSectionHeaderBlock)> array{};
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if (sizeof(NcaSectionHeaderBlock) !=
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file.ReadBytes(array.data(), sizeof(NcaSectionHeaderBlock)))
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NGLOG_CRITICAL(Loader, "File reader errored out during header read.");
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NcaSectionHeaderBlock block{};
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std::memcpy(&block, array.data(), sizeof(NcaSectionHeaderBlock));
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if (block.filesystem_type == NcaSectionFilesystemType::ROMFS) {
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romfs_offset = header.section_tables[i].media_offset * MEDIA_OFFSET_MULTIPLIER;
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romfs_size =
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header.section_tables[i].media_end_offset * MEDIA_OFFSET_MULTIPLIER - romfs_offset;
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} else if (block.filesystem_type == NcaSectionFilesystemType::PFS0) {
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Pfs0Superblock sb{};
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// Seek back to beginning of this section.
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file.Seek(SECTION_HEADER_OFFSET + i * SECTION_HEADER_SIZE, SEEK_SET);
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if (sizeof(Pfs0Superblock) != file.ReadBytes(&sb, sizeof(Pfs0Superblock)))
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NGLOG_CRITICAL(Loader, "File reader errored out during header read.");
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u64 offset = (static_cast<u64>(header.section_tables[i].media_offset) *
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MEDIA_OFFSET_MULTIPLIER) +
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sb.pfs0_header_offset;
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FileSys::PartitionFilesystem npfs{};
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ResultStatus status = npfs.Load(path, offset);
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if (status == ResultStatus::Success) {
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pfs.emplace_back(std::move(npfs));
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pfs_offset.emplace_back(offset);
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}
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}
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}
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for (size_t i = 0; i < pfs.size(); ++i) {
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if (IsPfsExeFs(pfs[i]))
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exefs_id = i;
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}
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return ResultStatus::Success;
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}
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FileSys::PartitionFilesystem Nca::GetPfs(u8 id) const {
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return pfs[id];
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}
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u64 Nca::GetExeFsFileOffset(const std::string& file_name) const {
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if (exefs_id == boost::none)
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return 0;
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return pfs[*exefs_id].GetFileOffset(file_name) + pfs_offset[*exefs_id];
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}
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u64 Nca::GetExeFsFileSize(const std::string& file_name) const {
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if (exefs_id == boost::none)
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return 0;
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return pfs[*exefs_id].GetFileSize(file_name);
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}
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u64 Nca::GetRomFsOffset() const {
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return romfs_offset;
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}
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u64 Nca::GetRomFsSize() const {
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return romfs_size;
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}
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std::vector<u8> Nca::GetExeFsFile(const std::string& file_name) {
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std::vector<u8> out(GetExeFsFileSize(file_name));
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file.Seek(GetExeFsFileOffset(file_name), SEEK_SET);
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file.ReadBytes(out.data(), GetExeFsFileSize(file_name));
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return out;
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}
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AppLoader_NCA::AppLoader_NCA(FileUtil::IOFile&& file, std::string filepath)
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: AppLoader(std::move(file)), filepath(std::move(filepath)) {}
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FileType AppLoader_NCA::IdentifyType(FileUtil::IOFile& file, const std::string&) {
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file.Seek(0, SEEK_SET);
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std::array<u8, 0x400> header_enc_array{};
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if (0x400 != file.ReadBytes(header_enc_array.data(), 0x400))
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return FileType::Error;
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// TODO(DarkLordZach): Assuming everything is decrypted. Add crypto support.
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NcaHeader header{};
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std::memcpy(&header, header_enc_array.data(), sizeof(NcaHeader));
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if (IsValidNca(header) && header.content_type == NcaContentType::Program)
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return FileType::NCA;
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return FileType::Error;
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}
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ResultStatus AppLoader_NCA::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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if (!file.IsOpen()) {
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return ResultStatus::Error;
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}
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nca = std::make_unique<Nca>();
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ResultStatus result = nca->Load(std::move(file), filepath);
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if (result != ResultStatus::Success) {
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return result;
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}
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result = metadata.Load(nca->GetExeFsFile("main.npdm"));
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if (result != ResultStatus::Success) {
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return result;
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}
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metadata.Print();
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const FileSys::ProgramAddressSpaceType arch_bits{metadata.GetAddressSpaceType()};
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if (arch_bits == FileSys::ProgramAddressSpaceType::Is32Bit) {
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return ResultStatus::ErrorUnsupportedArch;
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}
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VAddr next_load_addr{Memory::PROCESS_IMAGE_VADDR};
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for (const auto& module : {"rtld", "main", "subsdk0", "subsdk1", "subsdk2", "subsdk3",
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"subsdk4", "subsdk5", "subsdk6", "subsdk7", "sdk"}) {
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const VAddr load_addr = next_load_addr;
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next_load_addr = AppLoader_NSO::LoadModule(module, nca->GetExeFsFile(module), load_addr);
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if (next_load_addr) {
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NGLOG_DEBUG(Loader, "loaded module {} @ 0x{:X}", module, load_addr);
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} else {
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next_load_addr = load_addr;
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}
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}
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process->program_id = metadata.GetTitleID();
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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, metadata.GetMainThreadPriority(),
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metadata.GetMainThreadStackSize());
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if (nca->GetRomFsSize() > 0)
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Service::FileSystem::RegisterFileSystem(std::make_unique<FileSys::RomFS_Factory>(*this),
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Service::FileSystem::Type::RomFS);
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is_loaded = true;
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return ResultStatus::Success;
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}
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ResultStatus AppLoader_NCA::ReadRomFS(std::shared_ptr<FileUtil::IOFile>& romfs_file, u64& offset,
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u64& size) {
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if (nca->GetRomFsSize() == 0) {
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NGLOG_DEBUG(Loader, "No RomFS available");
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return ResultStatus::ErrorNotUsed;
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}
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romfs_file = std::make_shared<FileUtil::IOFile>(filepath, "rb");
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offset = nca->GetRomFsOffset();
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size = nca->GetRomFsSize();
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NGLOG_DEBUG(Loader, "RomFS offset: 0x{:016X}", offset);
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NGLOG_DEBUG(Loader, "RomFS size: 0x{:016X}", size);
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return ResultStatus::Success;
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}
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AppLoader_NCA::~AppLoader_NCA() = default;
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} // namespace Loader
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