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Diffstat (limited to '')
-rw-r--r-- | src/core/file_sys/kernel_executable.cpp | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/src/core/file_sys/kernel_executable.cpp b/src/core/file_sys/kernel_executable.cpp new file mode 100644 index 000000000..371300684 --- /dev/null +++ b/src/core/file_sys/kernel_executable.cpp @@ -0,0 +1,228 @@ +// Copyright 2019 yuzu emulator team +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#include "common/string_util.h" +#include "core/file_sys/kernel_executable.h" +#include "core/file_sys/vfs_offset.h" + +namespace FileSys { + +constexpr u32 INI_MAX_KIPS = 0x50; + +namespace { +bool DecompressBLZ(std::vector<u8>& data) { + if (data.size() < 0xC) + return {}; + + const auto data_size = data.size() - 0xC; + + u32 compressed_size{}; + u32 init_index{}; + u32 additional_size{}; + std::memcpy(&compressed_size, data.data() + data_size, sizeof(u32)); + std::memcpy(&init_index, data.data() + data_size + 0x4, sizeof(u32)); + std::memcpy(&additional_size, data.data() + data_size + 0x8, sizeof(u32)); + + const auto start_offset = data.size() - compressed_size; + data.resize(compressed_size + additional_size + start_offset); + + std::size_t index = compressed_size - init_index; + std::size_t out_index = compressed_size + additional_size; + + while (out_index > 0) { + --index; + auto control = data[index + start_offset]; + for (size_t i = 0; i < 8; ++i) { + if (((control << i) & 0x80) > 0) { + if (index < 2) { + return false; + } + index -= 2; + std::size_t segment_offset = + data[index + start_offset] | data[index + start_offset + 1] << 8; + std::size_t segment_size = ((segment_offset >> 12) & 0xF) + 3; + segment_offset &= 0xFFF; + segment_offset += 3; + + if (out_index < segment_size) + segment_size = out_index; + + if (out_index < segment_size) { + return false; + } + + out_index -= segment_size; + + for (size_t j = 0; j < segment_size; ++j) { + if (out_index + j + segment_offset + start_offset >= data.size()) { + return false; + } + data[out_index + j + start_offset] = + data[out_index + j + segment_offset + start_offset]; + } + } else { + if (out_index < 1) { + return false; + } + --out_index; + --index; + data[out_index + start_offset] = data[index + start_offset]; + } + + if (out_index == 0) + break; + } + } + + return true; +} +} // Anonymous namespace + +KIP::KIP(const VirtualFile& file) : status(Loader::ResultStatus::Success) { + if (file == nullptr) { + status = Loader::ResultStatus::ErrorNullFile; + return; + } + + if (file->GetSize() < sizeof(KIPHeader) || file->ReadObject(&header) != sizeof(KIPHeader)) { + status = Loader::ResultStatus::ErrorBadKIPHeader; + return; + } + + if (header.magic != Common::MakeMagic('K', 'I', 'P', '1')) { + status = Loader::ResultStatus::ErrorBadKIPHeader; + return; + } + + u64 offset = sizeof(KIPHeader); + for (std::size_t i = 0; i < header.sections.size(); ++i) { + auto compressed = file->ReadBytes(header.sections[i].compressed_size, offset); + offset += header.sections[i].compressed_size; + + if (header.sections[i].compressed_size == 0 && header.sections[i].decompressed_size != 0) { + decompressed_sections[i] = std::vector<u8>(header.sections[i].decompressed_size); + } else if (header.sections[i].compressed_size == header.sections[i].decompressed_size) { + decompressed_sections[i] = std::move(compressed); + } else { + decompressed_sections[i] = compressed; + if (!DecompressBLZ(decompressed_sections[i])) { + status = Loader::ResultStatus::ErrorBLZDecompressionFailed; + return; + } + } + } +} + +Loader::ResultStatus KIP::GetStatus() const { + return status; +} + +std::string KIP::GetName() const { + return Common::StringFromFixedZeroTerminatedBuffer(header.name.data(), header.name.size()); +} + +u64 KIP::GetTitleID() const { + return header.title_id; +} + +std::vector<u8> KIP::GetSectionDecompressed(u8 index) const { + return decompressed_sections[index]; +} + +bool KIP::Is64Bit() const { + return (header.flags & 0x8) != 0; +} + +bool KIP::Is39BitAddressSpace() const { + return (header.flags & 0x10) != 0; +} + +bool KIP::IsService() const { + return (header.flags & 0x20) != 0; +} + +std::vector<u32> KIP::GetKernelCapabilities() const { + return std::vector<u32>(header.capabilities.begin(), header.capabilities.end()); +} + +s32 KIP::GetMainThreadPriority() const { + return header.main_thread_priority; +} + +u32 KIP::GetMainThreadStackSize() const { + return header.sections[1].attribute; +} + +u32 KIP::GetMainThreadCpuCore() const { + return header.default_core; +} + +const std::vector<u8>& KIP::GetTextSection() const { + return decompressed_sections[0]; +} + +const std::vector<u8>& KIP::GetRODataSection() const { + return decompressed_sections[1]; +} + +const std::vector<u8>& KIP::GetDataSection() const { + return decompressed_sections[2]; +} + +u32 KIP::GetTextOffset() const { + return header.sections[0].offset; +} + +u32 KIP::GetRODataOffset() const { + return header.sections[1].offset; +} + +u32 KIP::GetDataOffset() const { + return header.sections[2].offset; +} + +u32 KIP::GetBSSSize() const { + return header.sections[3].decompressed_size; +} + +u32 KIP::GetBSSOffset() const { + return header.sections[3].offset; +} + +INI::INI(const VirtualFile& file) : status(Loader::ResultStatus::Success) { + if (file->GetSize() < sizeof(INIHeader) || file->ReadObject(&header) != sizeof(INIHeader)) { + status = Loader::ResultStatus::ErrorBadINIHeader; + return; + } + + if (header.magic != Common::MakeMagic('I', 'N', 'I', '1')) { + status = Loader::ResultStatus::ErrorBadINIHeader; + return; + } + + if (header.kip_count > INI_MAX_KIPS) { + status = Loader::ResultStatus::ErrorINITooManyKIPs; + return; + } + + u64 offset = sizeof(INIHeader); + for (std::size_t i = 0; i < header.kip_count; ++i) { + const auto kip_file = + std::make_shared<OffsetVfsFile>(file, file->GetSize() - offset, offset); + KIP kip(kip_file); + if (kip.GetStatus() == Loader::ResultStatus::Success) { + kips.push_back(std::move(kip)); + } + } +} + +Loader::ResultStatus INI::GetStatus() const { + return status; +} + +const std::vector<KIP>& INI::GetKIPs() const { + return kips; +} + +} // namespace FileSys |