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// Copyright 2019 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <cstring>
#include "common/string_util.h"
#include "core/file_sys/kernel_executable.h"
#include "core/file_sys/vfs_offset.h"
#include "core/loader/loader.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 (std::size_t i = 0; i < 8; ++i) {
if (((control << i) & 0x80) > 0) {
if (index < 2) {
return false;
}
index -= 2;
std::size_t segment_offset = static_cast<u32>(data[index + start_offset]) |
static_cast<u32>(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 static_cast<s32>(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
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