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yuzu/src/core/hle/service/ldr/ldr.cpp
Lioncash 817fb18e30 service/ldr: Corrent padding within the NRR header layout 
The padding after the magic signature value should be 12 bytes rather
than 28 bytes. The other 16 should be placed after the title ID pattern.
2018-12-05 00:05:04 -05:00

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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/alignment.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 {
constexpr ResultCode ERROR_INVALID_MEMORY_STATE{ErrorModule::Loader, 51};
constexpr ResultCode ERROR_INVALID_NRO{ErrorModule::Loader, 52};
constexpr ResultCode ERROR_INVALID_NRR{ErrorModule::Loader, 53};
constexpr ResultCode ERROR_MISSING_NRR_HASH{ErrorModule::Loader, 54};
constexpr ResultCode ERROR_MAXIMUM_NRO{ErrorModule::Loader, 55};
constexpr ResultCode ERROR_MAXIMUM_NRR{ErrorModule::Loader, 56};
constexpr ResultCode ERROR_ALREADY_LOADED{ErrorModule::Loader, 57};
constexpr ResultCode ERROR_INVALID_ALIGNMENT{ErrorModule::Loader, 81};
constexpr ResultCode ERROR_INVALID_SIZE{ErrorModule::Loader, 82};
constexpr ResultCode ERROR_INVALID_NRO_ADDRESS{ErrorModule::Loader, 84};
constexpr ResultCode ERROR_INVALID_NRR_ADDRESS{ErrorModule::Loader, 85};
constexpr ResultCode ERROR_NOT_INITIALIZED{ErrorModule::Loader, 87};
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, &RelocatableObject::UnloadNrr, "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>()};
LOG_DEBUG(Service_LDR, "called with nrr_addr={:016X}, nrr_size={:016X}", nrr_addr,
nrr_size);
if (!initialized) {
LOG_ERROR(Service_LDR, "LDR:RO not initialized before use!");
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ERROR_NOT_INITIALIZED);
return;
}
if (nrr.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 (!Common::Is4KBAligned(nrr_addr)) {
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 || !Common::Is4KBAligned(nrr_size)) {
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;
// Copy all hashes in the NRR (specified by hash count/hash offset) into vector.
for (std::size_t i = header.hash_offset;
i < (header.hash_offset + (header.hash_count * sizeof(SHA256Hash))); i += 8) {
SHA256Hash hash;
std::memcpy(hash.data(), nrr_data.data() + i, sizeof(SHA256Hash));
hashes.emplace_back(hash);
}
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>()};
LOG_DEBUG(Service_LDR, "called with nrr_addr={:016X}", nrr_addr);
if (!Common::Is4KBAligned(nrr_addr)) {
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>()};
LOG_DEBUG(
Service_LDR,
"called with nro_addr={:016X}, nro_size={:016X}, bss_addr={:016X}, bss_size={:016X}",
nro_addr, nro_size, bss_addr, bss_size);
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 (!Common::Is4KBAligned(nro_addr)) {
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
const auto nro_size_valid =
nro_size != 0 && nro_addr + nro_size > nro_addr && Common::Is4KBAligned(nro_size);
const auto bss_size_valid =
nro_size + bss_size >= nro_size && (bss_size == 0 || bss_addr + bss_size > bss_addr);
if (!nro_size_valid || !bss_size_valid) {
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::any_of(nro.begin(), nro.end(), [&hash](const std::pair<VAddr, NROInfo>& info) {
return info.second.hash == hash;
})) {
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 (!IsValidNROHash(hash)) {
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 (!IsValidNRO(header, nro_size, bss_size)) {
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);
if (!map_address.Succeeded() ||
*map_address + nro_size + bss_size > vm_manager.GetAddressSpaceEndAddress()) {
LOG_ERROR(Service_LDR,
"General error while allocation memory or no available memory to allocate!");
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ERROR_INVALID_MEMORY_STATE);
return;
}
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 UnloadNro(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp{ctx};
rp.Skip(2, false);
const VAddr mapped_addr{rp.PopRaw<VAddr>()};
const VAddr heap_addr{rp.PopRaw<VAddr>()};
LOG_DEBUG(Service_LDR, "called with mapped_addr={:016X}, heap_addr={:016X}", mapped_addr,
heap_addr);
if (!initialized) {
LOG_ERROR(Service_LDR, "LDR:RO not initialized before use!");
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ERROR_NOT_INITIALIZED);
return;
}
if (!Common::Is4KBAligned(mapped_addr) || !Common::Is4KBAligned(heap_addr)) {
LOG_ERROR(Service_LDR,
"NRO/BSS Address has invalid alignment (actual nro_addr={:016X}, "
"bss_addr={:016X})!",
mapped_addr, heap_addr);
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ERROR_INVALID_ALIGNMENT);
return;
}
const auto iter = nro.find(mapped_addr);
if (iter == nro.end()) {
LOG_ERROR(Service_LDR,
"The NRO attempting to unmap was not mapped or has an invalid address "
"(actual {:016X})!",
mapped_addr);
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ERROR_INVALID_NRO_ADDRESS);
return;
}
auto* process = Core::CurrentProcess();
auto& vm_manager = process->VMManager();
const auto& nro_size = iter->second.size;
ASSERT(process->MirrorMemory(heap_addr, mapped_addr, nro_size,
Kernel::MemoryState::ModuleCodeStatic) == RESULT_SUCCESS);
ASSERT(process->UnmapMemory(mapped_addr, 0, nro_size) == RESULT_SUCCESS);
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.erase(iter);
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(RESULT_SUCCESS);
}
void Initialize(Kernel::HLERequestContext& ctx) {
LOG_WARNING(Service_LDR, "(STUBBED) called");
initialized = true;
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(RESULT_SUCCESS);
}
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(12);
u64_le title_id_mask;
u64_le title_id_pattern;
INSERT_PADDING_BYTES(16);
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;
bool IsValidNROHash(const SHA256Hash& hash) {
return std::any_of(
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();
});
}
static bool IsValidNRO(const NROHeader& header, u64 nro_size, u64 bss_size) {
return 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 &&
Common::Is4KBAligned(header.text_size) && Common::Is4KBAligned(header.ro_size) &&
Common::Is4KBAligned(header.rw_size);
}
};
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
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