yuzu/src/core/hle/service/ldr/ldr.cpp

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// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <memory>
#include <fmt/format.h>
#include <mbedtls/sha256.h>
#include "common/hex_util.h"
#include "core/hle/ipc_helpers.h"
#include "core/hle/kernel/process.h"
#include "core/hle/service/ldr/ldr.h"
#include "core/hle/service/service.h"
#include "core/loader/nro.h"
namespace Service::LDR {
namespace ErrCodes {
enum {
InvalidNRO = 52,
InvalidNRR = 53,
MissingNRRHash = 54,
MaximumNRO = 55,
MaximumNRR = 56,
AlreadyLoaded = 57,
InvalidAlignment = 81,
InvalidSize = 82,
InvalidNROAddress = 84,
InvalidNRRAddress = 85,
NotInitialized = 87,
};
}
constexpr ResultCode ERROR_INVALID_NRO(ErrorModule::Loader, ErrCodes::InvalidNRO);
constexpr ResultCode ERROR_INVALID_NRR(ErrorModule::Loader, ErrCodes::InvalidNRR);
constexpr ResultCode ERROR_MISSING_NRR_HASH(ErrorModule::Loader, ErrCodes::MissingNRRHash);
constexpr ResultCode ERROR_MAXIMUM_NRO(ErrorModule::Loader, ErrCodes::MaximumNRO);
constexpr ResultCode ERROR_MAXIMUM_NRR(ErrorModule::Loader, ErrCodes::MaximumNRR);
constexpr ResultCode ERROR_ALREADY_LOADED(ErrorModule::Loader, ErrCodes::AlreadyLoaded);
constexpr ResultCode ERROR_INVALID_ALIGNMENT(ErrorModule::Loader, ErrCodes::InvalidAlignment);
constexpr ResultCode ERROR_INVALID_SIZE(ErrorModule::Loader, ErrCodes::InvalidSize);
constexpr ResultCode ERROR_INVALID_NRO_ADDRESS(ErrorModule::Loader, ErrCodes::InvalidNROAddress);
constexpr ResultCode ERROR_INVALID_NRR_ADDRESS(ErrorModule::Loader, ErrCodes::InvalidNRRAddress);
constexpr ResultCode ERROR_NOT_INITIALIZED(ErrorModule::Loader, ErrCodes::NotInitialized);
constexpr u64 MAXIMUM_LOADED_RO = 0x40;
class DebugMonitor final : public ServiceFramework<DebugMonitor> {
public:
explicit DebugMonitor() : ServiceFramework{"ldr:dmnt"} {
// clang-format off
static const FunctionInfo functions[] = {
{0, nullptr, "AddProcessToDebugLaunchQueue"},
{1, nullptr, "ClearDebugLaunchQueue"},
{2, nullptr, "GetNsoInfos"},
};
// clang-format on
RegisterHandlers(functions);
}
};
class ProcessManager final : public ServiceFramework<ProcessManager> {
public:
explicit ProcessManager() : ServiceFramework{"ldr:pm"} {
// clang-format off
static const FunctionInfo functions[] = {
{0, nullptr, "CreateProcess"},
{1, nullptr, "GetProgramInfo"},
{2, nullptr, "RegisterTitle"},
{3, nullptr, "UnregisterTitle"},
};
// clang-format on
RegisterHandlers(functions);
}
};
class Shell final : public ServiceFramework<Shell> {
public:
explicit Shell() : ServiceFramework{"ldr:shel"} {
// clang-format off
static const FunctionInfo functions[] = {
{0, nullptr, "AddProcessToLaunchQueue"},
{1, nullptr, "ClearLaunchQueue"},
};
// clang-format on
RegisterHandlers(functions);
}
};
class RelocatableObject final : public ServiceFramework<RelocatableObject> {
public:
explicit RelocatableObject() : ServiceFramework{"ldr:ro"} {
// clang-format off
static const FunctionInfo functions[] = {
{0, &RelocatableObject::LoadNro, "LoadNro"},
{1, &RelocatableObject::UnloadNro, "UnloadNro"},
{2, &RelocatableObject::LoadNrr, "LoadNrr"},
{3, nullptr, "UnloadNrr"},
{4, &RelocatableObject::Initialize, "Initialize"},
};
// clang-format on
RegisterHandlers(functions);
}
void LoadNrr(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp{ctx};
rp.Skip(2, false);
const VAddr nrr_addr{rp.Pop<VAddr>()};
const u64 nrr_size{rp.Pop<u64>()};
if (!initialized) {
LOG_ERROR(Service_LDR, "LDR:RO not initialized before use!");
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ERROR_NOT_INITIALIZED);
return;
}
if (nro.size() >= MAXIMUM_LOADED_RO) {
LOG_ERROR(Service_LDR, "Loading new NRR would exceed the maximum number of loaded NRRs "
"(0x40)! Failing...");
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ERROR_MAXIMUM_NRR);
return;
}
// NRR Address does not fall on 0x1000 byte boundary
if ((nrr_addr & 0xFFF) != 0) {
LOG_ERROR(Service_LDR, "NRR Address has invalid alignment (actual {:016X})!", nrr_addr);
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ERROR_INVALID_ALIGNMENT);
return;
}
// NRR Size is zero or causes overflow
if (nrr_addr + nrr_size <= nrr_addr || nrr_size == 0 || (nrr_size & 0xFFF) != 0) {
LOG_ERROR(Service_LDR, "NRR Size is invalid! (nrr_address={:016X}, nrr_size={:016X})",
nrr_addr, nrr_size);
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ERROR_INVALID_SIZE);
return;
}
// Read NRR data from memory
std::vector<u8> nrr_data(nrr_size);
Memory::ReadBlock(nrr_addr, nrr_data.data(), nrr_size);
NRRHeader header;
std::memcpy(&header, nrr_data.data(), sizeof(NRRHeader));
if (header.magic != Common::MakeMagic('N', 'R', 'R', '0')) {
LOG_ERROR(Service_LDR, "NRR did not have magic 'NRR0' (actual {:08X})!", header.magic);
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ERROR_INVALID_NRR);
return;
}
if (header.size != nrr_size) {
LOG_ERROR(Service_LDR,
"NRR header reported size did not match LoadNrr parameter size! "
"(header_size={:016X}, loadnrr_size={:016X})",
header.size, nrr_size);
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ERROR_INVALID_SIZE);
return;
}
if (Core::CurrentProcess()->GetTitleID() != header.title_id) {
LOG_ERROR(Service_LDR,
"Attempting to load NRR with title ID other than current process. (actual "
"{:016X})!",
header.title_id);
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ERROR_INVALID_NRR);
return;
}
std::vector<SHA256Hash> hashes;
for (std::size_t i = header.hash_offset;
i < (header.hash_offset + (header.hash_count << 5)); i += 8) {
hashes.emplace_back();
std::memcpy(hashes.back().data(), nrr_data.data() + i, sizeof(SHA256Hash));
}
nrr.insert_or_assign(nrr_addr, std::move(hashes));
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(RESULT_SUCCESS);
}
void UnloadNrr(Kernel::HLERequestContext& ctx) {
if (!initialized) {
LOG_ERROR(Service_LDR, "LDR:RO not initialized before use!");
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ERROR_NOT_INITIALIZED);
return;
}
IPC::RequestParser rp{ctx};
rp.Skip(2, false);
const auto nrr_addr{rp.Pop<VAddr>()};
if ((nrr_addr & 0xFFF) != 0) {
LOG_ERROR(Service_LDR, "NRR Address has invalid alignment (actual {:016X})!", nrr_addr);
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ERROR_INVALID_ALIGNMENT);
return;
}
const auto iter = nrr.find(nrr_addr);
if (iter == nrr.end()) {
LOG_ERROR(Service_LDR,
"Attempting to unload NRR which has not been loaded! (addr={:016X})",
nrr_addr);
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ERROR_INVALID_NRR_ADDRESS);
return;
}
nrr.erase(iter);
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(RESULT_SUCCESS);
}
void LoadNro(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp{ctx};
rp.Skip(2, false);
const VAddr nro_addr{rp.Pop<VAddr>()};
const u64 nro_size{rp.Pop<u64>()};
const VAddr bss_addr{rp.Pop<VAddr>()};
const u64 bss_size{rp.Pop<u64>()};
if (!initialized) {
LOG_ERROR(Service_LDR, "LDR:RO not initialized before use!");
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ERROR_NOT_INITIALIZED);
return;
}
if (nro.size() >= MAXIMUM_LOADED_RO) {
LOG_ERROR(Service_LDR, "Loading new NRO would exceed the maximum number of loaded NROs "
"(0x40)! Failing...");
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ERROR_MAXIMUM_NRO);
return;
}
// NRO Address does not fall on 0x1000 byte boundary
if ((nro_addr & 0xFFF) != 0) {
LOG_ERROR(Service_LDR, "NRO Address has invalid alignment (actual {:016X})!", nro_addr);
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ERROR_INVALID_ALIGNMENT);
return;
}
// NRO Size or BSS Size is zero or causes overflow
if (nro_addr + nro_size <= nro_addr || nro_size == 0 || (nro_size & 0xFFF) != 0 ||
(bss_size != 0 && bss_addr + bss_size <= bss_addr) ||
(std::numeric_limits<u64>::max() - nro_size < bss_size)) {
LOG_ERROR(Service_LDR,
"NRO Size or BSS Size is invalid! (nro_address={:016X}, nro_size={:016X}, "
"bss_address={:016X}, bss_size={:016X})",
nro_addr, nro_size, bss_addr, bss_size);
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ERROR_INVALID_SIZE);
return;
}
// Read NRO data from memory
std::vector<u8> nro_data(nro_size);
Memory::ReadBlock(nro_addr, nro_data.data(), nro_size);
SHA256Hash hash{};
mbedtls_sha256(nro_data.data(), nro_data.size(), hash.data(), 0);
// NRO Hash is already loaded
if (std::find_if(nro.begin(), nro.end(), [&hash](const std::pair<VAddr, NROInfo>& info) {
return info.second.hash == hash;
}) != nro.end()) {
LOG_ERROR(Service_LDR, "NRO is already loaded!");
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ERROR_ALREADY_LOADED);
return;
}
// NRO Hash is not in any loaded NRR
if (std::find_if(nrr.begin(), nrr.end(),
[&hash](const std::pair<VAddr, std::vector<SHA256Hash>>& p) {
return std::find(p.second.begin(), p.second.end(), hash) !=
p.second.end();
}) == nrr.end()) {
LOG_ERROR(Service_LDR,
"NRO hash is not present in any currently loaded NRRs (hash={})!",
Common::HexArrayToString(hash));
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ERROR_MISSING_NRR_HASH);
return;
}
NROHeader header;
std::memcpy(&header, nro_data.data(), sizeof(NROHeader));
if (header.magic != Common::MakeMagic('N', 'R', 'O', '0') || header.nro_size != nro_size ||
header.bss_size != bss_size ||
header.ro_offset != header.text_offset + header.text_size ||
header.rw_offset != header.ro_offset + header.ro_size ||
nro_size != header.rw_offset + header.rw_size || (header.text_size & 0xFFF) != 0 ||
(header.ro_size & 0xFFF) != 0 || (header.rw_size & 0xFFF) != 0) {
LOG_ERROR(Service_LDR, "NRO was invalid!");
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ERROR_INVALID_NRO);
return;
}
// Load NRO as new executable module
auto process = Core::CurrentProcess();
auto& vm_manager = process->VMManager();
auto map_address = vm_manager.FindFreeRegion(nro_size + bss_size);
ASSERT(map_address.Succeeded());
ASSERT(process->MirrorMemory(*map_address, nro_addr, nro_size,
Kernel::MemoryState::ModuleCodeStatic) == RESULT_SUCCESS);
ASSERT(process->UnmapMemory(nro_addr, 0, nro_size) == RESULT_SUCCESS);
if (bss_size > 0) {
ASSERT(process->MirrorMemory(*map_address + nro_size, bss_addr, bss_size,
Kernel::MemoryState::ModuleCodeStatic) == RESULT_SUCCESS);
ASSERT(process->UnmapMemory(bss_addr, 0, bss_size) == RESULT_SUCCESS);
}
vm_manager.ReprotectRange(*map_address, header.text_size,
Kernel::VMAPermission::ReadExecute);
vm_manager.ReprotectRange(*map_address + header.ro_offset, header.ro_size,
Kernel::VMAPermission::Read);
vm_manager.ReprotectRange(*map_address + header.rw_offset, header.rw_size,
Kernel::VMAPermission::ReadWrite);
Core::System::GetInstance().ArmInterface(0).ClearInstructionCache();
Core::System::GetInstance().ArmInterface(1).ClearInstructionCache();
Core::System::GetInstance().ArmInterface(2).ClearInstructionCache();
Core::System::GetInstance().ArmInterface(3).ClearInstructionCache();
nro.insert_or_assign(*map_address, NROInfo{hash, nro_size + bss_size});
IPC::ResponseBuilder rb{ctx, 4};
rb.Push(RESULT_SUCCESS);
rb.Push(*map_address);
}
}
void Initialize(Kernel::HLERequestContext& ctx) {
initialized = true;
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(RESULT_SUCCESS);
LOG_WARNING(Service_LDR, "(STUBBED) called");
}
private:
using SHA256Hash = std::array<u8, 0x20>;
struct NROHeader {
u32_le entrypoint_insn;
u32_le mod_offset;
INSERT_PADDING_WORDS(2);
u32_le magic;
INSERT_PADDING_WORDS(1);
u32_le nro_size;
INSERT_PADDING_WORDS(1);
u32_le text_offset;
u32_le text_size;
u32_le ro_offset;
u32_le ro_size;
u32_le rw_offset;
u32_le rw_size;
u32_le bss_size;
INSERT_PADDING_WORDS(1);
std::array<u8, 0x20> build_id;
INSERT_PADDING_BYTES(0x20);
};
static_assert(sizeof(NROHeader) == 0x80, "NROHeader has invalid size.");
struct NRRHeader {
u32_le magic;
INSERT_PADDING_BYTES(0x1C);
u64_le title_id_mask;
u64_le title_id_pattern;
std::array<u8, 0x100> modulus;
std::array<u8, 0x100> signature_1;
std::array<u8, 0x100> signature_2;
u64_le title_id;
u32_le size;
INSERT_PADDING_BYTES(4);
u32_le hash_offset;
u32_le hash_count;
INSERT_PADDING_BYTES(8);
};
static_assert(sizeof(NRRHeader) == 0x350, "NRRHeader has incorrect size.");
struct NROInfo {
SHA256Hash hash;
u64 size;
};
bool initialized = false;
std::map<VAddr, NROInfo> nro;
std::map<VAddr, std::vector<SHA256Hash>> nrr;
};
void InstallInterfaces(SM::ServiceManager& sm) {
std::make_shared<DebugMonitor>()->InstallAsService(sm);
std::make_shared<ProcessManager>()->InstallAsService(sm);
std::make_shared<Shell>()->InstallAsService(sm);
std::make_shared<RelocatableObject>()->InstallAsService(sm);
}
} // namespace Service::LDR