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Atmosphere/stratosphere/ro/source/impl/ro_service_impl.cpp

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/*
* Copyright (c) Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stratosphere.hpp>
#include "ro_nrr_utils.hpp"
#include "ro_nro_utils.hpp"
#include "ro_patcher.hpp"
#include "ro_random.hpp"
#include "ro_service_impl.hpp"
namespace ams::ro::impl {
namespace {
/* Convenience definitions. */
constexpr size_t MaxSessions = 0x3; /* 2 official sessions (applet + application, 1 homebrew session). */
constexpr size_t MaxNrrInfos = 0x40;
constexpr size_t MaxNroInfos = 0x40;
/* Types. */
struct Sha256Hash {
u8 hash[crypto::Sha256Generator::HashSize];
bool operator==(const Sha256Hash &o) const {
return std::memcmp(this, std::addressof(o), sizeof(*this)) == 0;
}
bool operator!=(const Sha256Hash &o) const {
return std::memcmp(this, std::addressof(o), sizeof(*this)) != 0;
}
bool operator<(const Sha256Hash &o) const {
return std::memcmp(this, std::addressof(o), sizeof(*this)) < 0;
}
bool operator>(const Sha256Hash &o) const {
return std::memcmp(this, std::addressof(o), sizeof(*this)) > 0;
}
};
static_assert(sizeof(Sha256Hash) == sizeof(Sha256Hash::hash));
struct NroInfo {
u64 base_address;
u64 nro_heap_address;
u64 nro_heap_size;
u64 bss_heap_address;
u64 bss_heap_size;
u64 code_size;
u64 ro_size; /* 23.0.0+ */
u64 rw_size;
ModuleId module_id;
bool is_compress; /* 23.0.0+ */
};
struct NrrInfo {
const NrrHeader *mapped_header;
u64 nrr_heap_address;
u64 nrr_heap_size;
u64 mapped_code_address;
/* Verification. */
u32 cached_signed_area_size;
u32 cached_hashes_offset;
u32 cached_num_hashes;
u8 cached_signed_area[sizeof(NrrHeader) - NrrHeader::GetSignedAreaOffset()];
Sha256Hash signed_area_hash;
};
struct AdditionalNroHeaderInfo {
u32 signature;
u8 reserved_04[0xC];
u32 compressed_size;
u32 reserved_14;
u32 hash_size;
u32 hash_offset;
u8 reserved_20[0x40];
};
struct ProcessContext {
private:
bool m_nro_in_use[MaxNroInfos]{};
bool m_nrr_in_use[MaxNrrInfos]{};
NroInfo m_nro_infos[MaxNroInfos]{};
NrrInfo m_nrr_infos[MaxNrrInfos]{};
os::NativeHandle m_process_handle = os::InvalidNativeHandle;
os::ProcessId m_process_id = os::InvalidProcessId;
bool m_in_use{};
u8 m_decompression_src_work_buffer[0x10000]{};
u8 m_decompression_dst_work_buffer[0x10000]{};
public:
constexpr ProcessContext() = default;
void Initialize(os::NativeHandle process_handle, os::ProcessId process_id) {
AMS_ABORT_UNLESS(!m_in_use);
std::memset(m_nro_in_use, 0, sizeof(m_nro_in_use));
std::memset(m_nrr_in_use, 0, sizeof(m_nrr_in_use));
std::memset(m_nro_infos, 0, sizeof(m_nro_infos));
std::memset(m_nrr_infos, 0, sizeof(m_nrr_infos));
m_process_handle = process_handle;
m_process_id = process_id;
m_in_use = true;
std::memset(m_decompression_src_work_buffer, 0, sizeof(m_decompression_src_work_buffer));
std::memset(m_decompression_dst_work_buffer, 0, sizeof(m_decompression_dst_work_buffer));
}
void Finalize() {
AMS_ABORT_UNLESS(m_in_use);
if (m_process_handle != os::InvalidNativeHandle) {
for (size_t i = 0; i < MaxNrrInfos; i++) {
if (m_nrr_in_use[i]) {
R_DISCARD(UnmapNrr(m_process_handle, m_nrr_infos[i].mapped_header, m_nrr_infos[i].nrr_heap_address, m_nrr_infos[i].nrr_heap_size, m_nrr_infos[i].mapped_code_address));
}
}
os::CloseNativeHandle(m_process_handle);
}
std::memset(m_nro_in_use, 0, sizeof(m_nro_in_use));
std::memset(m_nrr_in_use, 0, sizeof(m_nrr_in_use));
std::memset(m_nro_infos, 0, sizeof(m_nro_infos));
std::memset(m_nrr_infos, 0, sizeof(m_nrr_infos));
m_process_handle = os::InvalidNativeHandle;
m_process_id = os::InvalidProcessId;
m_in_use = false;
std::memset(m_decompression_src_work_buffer, 0, sizeof(m_decompression_src_work_buffer));
std::memset(m_decompression_dst_work_buffer, 0, sizeof(m_decompression_dst_work_buffer));
}
os::NativeHandle GetProcessHandle() const {
return m_process_handle;
}
os::ProcessId GetProcessId() const {
return m_process_id;
}
bool IsFree() const {
return !m_in_use;
}
ncm::ProgramId GetProgramId(os::NativeHandle other_process_h) const {
/* Automatically select a handle, allowing for override. */
if (other_process_h != os::InvalidNativeHandle) {
return os::GetProgramId(other_process_h);
} else {
return os::GetProgramId(m_process_handle);
}
}
Result GetNrrInfoByAddress(NrrInfo **out, u64 nrr_heap_address) {
for (size_t i = 0; i < MaxNrrInfos; i++) {
if (m_nrr_in_use[i] && m_nrr_infos[i].nrr_heap_address == nrr_heap_address) {
if (out != nullptr) {
*out = m_nrr_infos + i;
}
R_SUCCEED();
}
}
R_THROW(ro::ResultNotRegistered());
}
Result GetFreeNrrInfo(NrrInfo **out) {
for (size_t i = 0; i < MaxNrrInfos; i++) {
if (!m_nrr_in_use[i]) {
if (out != nullptr) {
*out = m_nrr_infos + i;
}
R_SUCCEED();
}
}
R_THROW(ro::ResultTooManyNrr());
}
Result GetNroInfoByAddress(NroInfo **out, u64 nro_address) {
for (size_t i = 0; i < MaxNroInfos; i++) {
if (m_nro_in_use[i] && m_nro_infos[i].base_address == nro_address) {
if (out != nullptr) {
*out = m_nro_infos + i;
}
R_SUCCEED();
}
}
R_THROW(ro::ResultNotLoaded());
}
Result GetNroInfoByModuleId(NroInfo **out, const ModuleId *module_id) {
for (size_t i = 0; i < MaxNroInfos; i++) {
if (m_nro_in_use[i] && std::memcmp(std::addressof(m_nro_infos[i].module_id), module_id, sizeof(*module_id)) == 0) {
if (out != nullptr) {
*out = m_nro_infos + i;
}
R_SUCCEED();
}
}
R_THROW(ro::ResultNotLoaded());
}
Result GetFreeNroInfo(NroInfo **out) {
for (size_t i = 0; i < MaxNroInfos; i++) {
if (!m_nro_in_use[i]) {
if (out != nullptr) {
*out = m_nro_infos + i;
}
R_SUCCEED();
}
}
R_THROW(ro::ResultTooManyNro());
}
Result ValidateHasNroHash(const NroHeader *nro_header) const {
/* Calculate hash. */
Sha256Hash hash;
crypto::GenerateSha256(std::addressof(hash), sizeof(hash), nro_header, nro_header->GetSize());
for (size_t i = 0; i < MaxNrrInfos; i++) {
/* Ensure we only check NRRs that are used. */
if (!m_nrr_in_use[i]) {
continue;
}
/* Get the mapped header, ensure that it has hashes. */
const NrrHeader *mapped_nrr_header = m_nrr_infos[i].mapped_header;
const size_t mapped_num_hashes = mapped_nrr_header->GetNumHashes();
if (mapped_num_hashes == 0) {
continue;
}
/* Locate the hash within the mapped array. */
const Sha256Hash *mapped_nro_hashes_start = reinterpret_cast<const Sha256Hash *>(mapped_nrr_header->GetHashes());
const Sha256Hash *mapped_nro_hashes_end = mapped_nro_hashes_start + mapped_nrr_header->GetNumHashes();
const Sha256Hash *mapped_lower_bound = std::lower_bound(mapped_nro_hashes_start, mapped_nro_hashes_end, hash);
if (mapped_lower_bound == mapped_nro_hashes_end || (*mapped_lower_bound != hash)) {
continue;
}
/* Check that the hash entry is valid, since our heuristic passed. */
const void *nrr_hash = std::addressof(m_nrr_infos[i].signed_area_hash);
const void *signed_area = m_nrr_infos[i].cached_signed_area;
const size_t signed_area_size = m_nrr_infos[i].cached_signed_area_size;
const size_t hashes_offset = m_nrr_infos[i].cached_hashes_offset;
const size_t num_hashes = m_nrr_infos[i].cached_num_hashes;
const u8 *hash_table = reinterpret_cast<const u8 *>(mapped_nro_hashes_start);
if (!ValidateNrrHashTableEntry(signed_area, signed_area_size, hashes_offset, num_hashes, nrr_hash, hash_table, std::addressof(hash))) {
continue;
}
/* The hash is valid! */
R_SUCCEED();
}
R_THROW(ro::ResultNotAuthorized());
}
Result ValidateNro(NroHeader **out_header, AdditionalNroHeaderInfo *out_additional_header_info, void *out_additional_header_hash, u8 *mapped_memory, u64 expected_nro_size, u64 expected_bss_size) {
/* Validate header. */
NroHeader *header = reinterpret_cast<NroHeader *>(mapped_memory);
R_UNLESS(header->IsMagicValid(), ro::ResultInvalidNro());
/* Read sizes from header. */
const u64 nro_size = header->GetSize();
const u64 text_ofs = header->GetTextOffset();
const u64 text_size = header->GetTextSize();
const u64 ro_ofs = header->GetRoOffset();
const u64 ro_size = header->GetRoSize();
const u64 rw_ofs = header->GetRwOffset();
const u64 rw_size = header->GetRwSize();
const u64 bss_size = header->GetBssSize();
/* Validate all sizes are aligned. */
R_UNLESS(util::IsAligned(text_size, os::MemoryPageSize), ro::ResultInvalidNro());
R_UNLESS(util::IsAligned(ro_size, os::MemoryPageSize), ro::ResultInvalidNro());
R_UNLESS(util::IsAligned(rw_size, os::MemoryPageSize), ro::ResultInvalidNro());
R_UNLESS(util::IsAligned(bss_size, os::MemoryPageSize), ro::ResultInvalidNro());
/* Validate sizes meet expected. */
R_UNLESS(nro_size == expected_nro_size, ro::ResultInvalidNro());
/* Account for compression when checking bss size. */
if (header->IsCompress()) {
R_UNLESS((bss_size - expected_nro_size + (rw_ofs + rw_size)) == expected_bss_size, ro::ResultInvalidBssSize());
} else {
/* 23.0.0+ uses the new error code here too. */
if (hos::GetVersion() >= hos::Version_23_0_0) {
R_UNLESS(bss_size == expected_bss_size, ro::ResultInvalidBssSize());
} else {
R_UNLESS(bss_size == expected_bss_size, ro::ResultInvalidNro());
}
}
/* Validate sections are in order. */
R_UNLESS(text_ofs <= ro_ofs, ro::ResultInvalidNro());
R_UNLESS(ro_ofs <= rw_ofs, ro::ResultInvalidNro());
/* Validate sections are sequential and contiguous. */
R_UNLESS(text_ofs == 0, ro::ResultInvalidNro());
R_UNLESS(text_ofs + text_size == ro_ofs, ro::ResultInvalidNro());
R_UNLESS(ro_ofs + ro_size == rw_ofs, ro::ResultInvalidNro());
/* Only check data section if not using compression. */
if (!header->IsCompress()) {
R_UNLESS(rw_ofs + rw_size == nro_size, ro::ResultInvalidNro());
}
/* Verify NRO hash. */
R_TRY(this->ValidateHasNroHash(header));
/* Check if NRO has already been loaded. */
const ModuleId *module_id = header->GetModuleId();
R_UNLESS(R_FAILED(this->GetNroInfoByModuleId(nullptr, module_id)), ro::ResultAlreadyLoaded());
/* Validate compression related fields. */
if (header->IsCompress()) {
const u64 additional_header_offset = header->GetAdditionalHeaderOffset();
/* Compression must have aligned header as well. */
R_UNLESS(header->IsAlignedHeader(), ro::ResultInvalidNro());
/* Validate additional header offset. */
R_UNLESS(additional_header_offset == 0x80, ro::ResultInvalidNro());
/* Validate additional header. */
AdditionalNroHeader *additional_header = reinterpret_cast<AdditionalNroHeader *>(mapped_memory + additional_header_offset);
R_UNLESS(additional_header->IsMagicValid(), ro::ResultInvalidNro());
/* Read sizes from header. */
const u64 hash_size = additional_header->GetHashSize();
const u64 hash_offset = additional_header->GetHashOffset();
const u64 compressed_size = additional_header->GetCompressedSize();
/* Validate additional header hash size and offset. */
R_UNLESS(hash_size == 0x20, ro::ResultInvalidNro());
R_UNLESS(hash_offset == 0xE0, ro::ResultInvalidNro());
/* Copy the additional header hash to output. */
std::memcpy(out_additional_header_hash, additional_header->GetHash(), hash_size);
/* Validate compressed size. */
R_UNLESS(rw_ofs + rw_size > nro_size, ro::ResultInvalidNro());
R_UNLESS(compressed_size >= 0x1000, ro::ResultInvalidNro());
R_UNLESS(util::AlignUp(compressed_size, os::MemoryPageSize) == expected_nro_size, ro::ResultInvalidNro());
/* Copy the additional header info to output. This is AdditionalNroHeader minus the hash. */
std::memcpy(reinterpret_cast<void*>(out_additional_header_info), additional_header, sizeof(AdditionalNroHeader) - hash_size);
} else {
/* Explicitly clear additional header hash and info. */
std::memset(out_additional_header_hash, 0, crypto::Sha256Generator::HashSize);
std::memset(reinterpret_cast<void*>(out_additional_header_info), 0, sizeof(AdditionalNroHeaderInfo));
}
/* Copy the header to output. */
*out_header = header;
R_SUCCEED();
}
Result DecompressNro(u8 *mapped_nro, u64 total_size, const NroHeader *nro_header, u32 compressed_size) {
/* Read sizes from header. */
const u64 rw_ofs = nro_header->GetRwOffset();
const u64 rw_size = nro_header->GetRwSize();
const u64 bss_size = nro_header->GetBssSize();
/* Divide the mapped NRO into regions devised for the decompression. */
u8 *nro_aligned_start = static_cast<u8 *>(mapped_nro + 0x1000);
const u8 *nro_expected_end = static_cast<const u8 *>(mapped_nro + total_size);
const u64 nro_src_buffer_size = compressed_size - 0x1000;
u8 *nro_src_buffer = static_cast<u8 *>(mapped_nro + total_size - nro_src_buffer_size);
const u64 nro_dst_buffer_size = total_size - 0xC00;
u8 *nro_dst_buffer = static_cast<u8 *>(mapped_nro + 0xC00);
/* Copy to source buffer. */
std::memmove(nro_src_buffer, nro_aligned_start, nro_src_buffer_size);
/* Decompress. */
u64 decompressed_size = 0;
R_UNLESS(util::DecompressLZ4Frame(std::addressof(decompressed_size), nro_dst_buffer, nro_dst_buffer_size, nro_src_buffer, nro_src_buffer_size, m_decompression_src_work_buffer, sizeof(m_decompression_src_work_buffer), m_decompression_dst_work_buffer, sizeof(m_decompression_dst_work_buffer)) == 0, ro::ResultInvalidNro());
/* Find the BSS. */
u8 *nro_expected_bss_start = static_cast<u8 *>(mapped_nro + rw_ofs + rw_size);
const u8 *nro_expected_bss_end = static_cast<const u8 *>(nro_expected_bss_start + bss_size);
const u8 *nro_bss_start = static_cast<const u8 *>(nro_expected_bss_start - 0x400);
const u8 *nro_decompressed_end = static_cast<const u8 *>(nro_dst_buffer + decompressed_size);
/* The decompressed data must end at the expected BSS start. */
if (nro_decompressed_end == nro_bss_start) {
/* Copy the decompressed data back to the mapped NRO memory. */
std::memmove(nro_aligned_start, nro_dst_buffer, decompressed_size);
std::memset(nro_dst_buffer, 0, 0x400);
/* Check the BSS ends where it's supposed, initialize it and then succeed. */
if (nro_expected_bss_end == nro_expected_end) {
std::memset(nro_expected_bss_start, 0, bss_size);
R_SUCCEED();
}
}
/* Clear the decompressed data buffer in case of error. */
std::memset(nro_dst_buffer, 0, nro_dst_buffer_size);
R_THROW(ro::ResultInvalidNro());
}
Result CheckAdditionalHeaderHash(const u8 *mapped_nro, const void *additional_nro_header_hash, size_t additional_nro_header_hash_size, u64 rw_ofs, u64 rw_size) {
/* Calculate hash. */
Sha256Hash nro_rw_hash;
crypto::GenerateSha256(std::addressof(nro_rw_hash), additional_nro_header_hash_size, mapped_nro + 0x1000, (rw_ofs + rw_size) - 0x1000);
/* Compare the hashes. */
const Sha256Hash *expected_hash = reinterpret_cast<const Sha256Hash *>(additional_nro_header_hash);
if (*expected_hash != nro_rw_hash) {
R_THROW(ro::ResultInvalidNro());
}
R_SUCCEED();
}
Result ParseNro(ModuleId *out_module_id, u64 *out_rx_size, u64 *out_ro_size, u64 *out_rw_size, u64 *out_bss_size, bool *out_aligned_header, bool *out_is_compress, u64 base_address, u64 total_size, u64 expected_nro_size, u64 expected_bss_size) {
/* Map the NRO. */
void *mapped_memory = nullptr;
R_TRY_CATCH(os::MapProcessMemory(std::addressof(mapped_memory), m_process_handle, base_address, total_size, ro::impl::GenerateSecureRandom)) {
R_CONVERT(os::ResultOutOfAddressSpace, ro::ResultOutOfAddressSpace())
} R_END_TRY_CATCH;
/* When we're done, unmap the memory. */
ON_SCOPE_EXIT { os::UnmapProcessMemory(mapped_memory, m_process_handle, base_address, total_size); };
/* ValidateNro */
NroHeader *nro_header = nullptr;
AdditionalNroHeaderInfo additional_nro_header_info;
u8 additional_nro_header_hash[crypto::Sha256Generator::HashSize];
R_TRY(this->ValidateNro(std::addressof(nro_header), std::addressof(additional_nro_header_info), std::addressof(additional_nro_header_hash), static_cast<u8 *>(mapped_memory), expected_nro_size, expected_bss_size));
/* DecompressNro */
if (nro_header->IsCompress()) {
R_TRY(this->DecompressNro(static_cast<u8 *>(mapped_memory), total_size, nro_header, additional_nro_header_info.compressed_size));
/* CheckAdditionalHeaderHash */
if (nro_header->GetAdditionalHeaderOffset() != 0) {
R_TRY(this->CheckAdditionalHeaderHash(static_cast<u8 *>(mapped_memory), std::addressof(additional_nro_header_hash), sizeof(additional_nro_header_hash), nro_header->GetRwOffset(), nro_header->GetRwSize()));
ON_RESULT_FAILURE { std::memset(static_cast<u8 *>(mapped_memory) + 0x1000, 0, total_size - 0x1000); };
}
}
/* Apply patches to NRO. */
const ModuleId *module_id = nro_header->GetModuleId();
LocateAndApplyIpsPatchesToModule(module_id, static_cast<u8 *>(mapped_memory), nro_header->GetSize());
/* Copy to output. */
*out_module_id = *module_id;
*out_rx_size = nro_header->GetTextSize();
*out_ro_size = nro_header->GetRoSize();
*out_rw_size = nro_header->GetRwSize();
*out_bss_size = nro_header->GetBssSize();
*out_aligned_header = nro_header->IsAlignedHeader();
*out_is_compress = nro_header->IsCompress();
R_SUCCEED();
}
void SetNrrInfoInUse(const NrrInfo *info, bool in_use) {
AMS_ASSERT(std::addressof(m_nrr_infos[0]) <= info && info <= std::addressof(m_nrr_infos[MaxNrrInfos - 1]));
const size_t index = info - std::addressof(m_nrr_infos[0]);
m_nrr_in_use[index] = in_use;
}
void SetNroInfoInUse(const NroInfo *info, bool in_use) {
AMS_ASSERT(std::addressof(m_nro_infos[0]) <= info && info <= std::addressof(m_nro_infos[MaxNroInfos - 1]));
const size_t index = info - std::addressof(m_nro_infos[0]);
m_nro_in_use[index] = in_use;
}
void GetProcessModuleInfo(u32 *out_count, ldr::ModuleInfo *out_infos, size_t max_out_count) const {
size_t count = 0;
for (size_t i = 0; i < MaxNroInfos && count < max_out_count; i++) {
if (!m_nro_in_use[i]) {
continue;
}
const NroInfo *nro_info = m_nro_infos + i;
/* Just copy out the info. */
auto &out_info = out_infos[count++];
std::memcpy(out_info.module_id, nro_info->module_id.data, sizeof(out_info.module_id));
out_info.address = nro_info->base_address;
out_info.size = nro_info->nro_heap_size + nro_info->bss_heap_size;
}
*out_count = static_cast<u32>(count);
}
};
/* Globals. */
constinit ProcessContext g_process_contexts[MaxSessions] = {};
constinit bool g_is_development_hardware = false;
constinit bool g_is_development_function_enabled = false;
/* Context Helpers. */
ProcessContext *GetContextById(size_t context_id) {
if (context_id == InvalidContextId) {
return nullptr;
}
AMS_ABORT_UNLESS(context_id < MaxSessions);
return g_process_contexts + context_id;
}
ProcessContext *GetContextByProcessId(os::ProcessId process_id) {
for (size_t i = 0; i < MaxSessions; i++) {
if (g_process_contexts[i].GetProcessId() == process_id) {
return g_process_contexts + i;
}
}
return nullptr;
}
size_t AllocateContext(os::NativeHandle process_handle, os::ProcessId process_id) {
/* Find a free process context. */
for (size_t i = 0; i < MaxSessions; i++) {
ProcessContext *context = g_process_contexts + i;
if (context->IsFree()) {
context->Initialize(process_handle, process_id);
return i;
}
}
/* Failure to find a free context is actually an abort condition. */
AMS_ABORT_UNLESS(false);
}
void FreeContext(size_t context_id) {
if (ProcessContext *context = GetContextById(context_id); context != nullptr) {
context->Finalize();
}
}
constexpr inline Result ValidateAddressAndNonZeroSize(u64 address, u64 size) {
R_UNLESS(util::IsAligned(address, os::MemoryPageSize), ro::ResultInvalidAddress());
R_UNLESS(size != 0, ro::ResultInvalidSize());
R_UNLESS(util::IsAligned(size, os::MemoryPageSize), ro::ResultInvalidSize());
R_UNLESS(address < address + size, ro::ResultInvalidSize());
R_SUCCEED();
}
constexpr inline Result ValidateAddressAndSize(u64 address, u64 size) {
R_UNLESS(util::IsAligned(address, os::MemoryPageSize), ro::ResultInvalidAddress());
R_UNLESS(util::IsAligned(size, os::MemoryPageSize), ro::ResultInvalidSize());
R_UNLESS(size == 0 || address < address + size, ro::ResultInvalidSize());
R_SUCCEED();
}
}
/* Access utilities. */
void SetDevelopmentHardware(bool is_development_hardware) {
g_is_development_hardware = is_development_hardware;
}
void SetDevelopmentFunctionEnabled(bool is_development_function_enabled) {
g_is_development_function_enabled = is_development_function_enabled;
}
bool IsDevelopmentHardware() {
return g_is_development_hardware;
}
bool IsDevelopmentFunctionEnabled() {
return g_is_development_function_enabled;
}
bool ShouldEaseNroRestriction() {
/* Retrieve whether we should ease restrictions from set:sys. */
u8 should_ease = 0;
if (settings::fwdbg::GetSettingsItemValue(std::addressof(should_ease), sizeof(should_ease), "ro", "ease_nro_restriction") != sizeof(should_ease)) {
return false;
}
/* Nintendo only allows easing restriction on dev, we will allow on production, as well. */
/* should_ease &= IsDevelopmentFunctionEnabled(); */
return should_ease != 0;
}
/* Context utilities. */
Result RegisterProcess(size_t *out_context_id, sf::NativeHandle &&process_handle, os::ProcessId process_id) {
/* Validate process handle. */
{
/* Validate handle is a valid process handle. */
os::ProcessId handle_pid;
R_UNLESS(R_SUCCEEDED(os::GetProcessId(std::addressof(handle_pid), process_handle.GetOsHandle())), ro::ResultInvalidProcess());
/* Validate process id. */
R_UNLESS(handle_pid == process_id, ro::ResultInvalidProcess());
}
/* Check if a process context already exists. */
R_UNLESS(GetContextByProcessId(process_id) == nullptr, ro::ResultInvalidSession());
/* Allocate a context to manage the process handle. */
*out_context_id = AllocateContext(process_handle.GetOsHandle(), process_id);
process_handle.Detach();
R_SUCCEED();
}
Result ValidateProcess(size_t context_id, os::ProcessId process_id) {
const ProcessContext *ctx = GetContextById(context_id);
R_UNLESS(ctx != nullptr, ro::ResultInvalidProcess());
R_UNLESS(ctx->GetProcessId() == process_id, ro::ResultInvalidProcess());
R_SUCCEED();
}
void UnregisterProcess(size_t context_id) {
FreeContext(context_id);
}
/* Service implementations. */
Result RegisterModuleInfo(size_t context_id, os::NativeHandle process_handle, u64 nrr_address, u64 nrr_size, NrrKind nrr_kind, bool enforce_nrr_kind) {
/* Get context. */
ProcessContext *context = GetContextById(context_id);
AMS_ABORT_UNLESS(context != nullptr);
/* Get program id. */
const ncm::ProgramId program_id = context->GetProgramId(process_handle);
/* Validate address/size. */
R_TRY(ValidateAddressAndNonZeroSize(nrr_address, nrr_size));
/* Check we have space for a new NRR. */
NrrInfo *nrr_info = nullptr;
R_TRY(context->GetFreeNrrInfo(std::addressof(nrr_info)));
/* Prepare to cache the NRR's signature hash. */
Sha256Hash signed_area_hash;
ON_SCOPE_EXIT { crypto::ClearMemory(std::addressof(signed_area_hash), sizeof(signed_area_hash)); };
/* Map. */
NrrHeader *header = nullptr;
u64 mapped_code_address = 0;
R_TRY(MapAndValidateNrr(std::addressof(header), std::addressof(mapped_code_address), std::addressof(signed_area_hash), sizeof(signed_area_hash), context->GetProcessHandle(), program_id, nrr_address, nrr_size, nrr_kind, enforce_nrr_kind));
/* Set NRR info. */
context->SetNrrInfoInUse(nrr_info, true);
nrr_info->mapped_header = header;
nrr_info->nrr_heap_address = nrr_address;
nrr_info->nrr_heap_size = nrr_size;
nrr_info->mapped_code_address = mapped_code_address;
nrr_info->cached_signed_area_size = header->GetSignedAreaSize();
nrr_info->cached_hashes_offset = header->GetHashesOffset();
nrr_info->cached_num_hashes = header->GetNumHashes();
std::memcpy(nrr_info->cached_signed_area, header->GetSignedArea(), std::min(sizeof(nrr_info->cached_signed_area), header->GetHashesOffset() - header->GetSignedAreaOffset()));
std::memcpy(std::addressof(nrr_info->signed_area_hash), std::addressof(signed_area_hash), sizeof(signed_area_hash));
R_SUCCEED();
}
Result UnregisterModuleInfo(size_t context_id, u64 nrr_address) {
/* Get context. */
ProcessContext *context = GetContextById(context_id);
AMS_ABORT_UNLESS(context != nullptr);
/* Validate address. */
R_UNLESS(util::IsAligned(nrr_address, os::MemoryPageSize), ro::ResultInvalidAddress());
/* Check the NRR is loaded. */
NrrInfo *nrr_info = nullptr;
R_TRY(context->GetNrrInfoByAddress(std::addressof(nrr_info), nrr_address));
/* Unmap. */
const NrrInfo nrr_backup = *nrr_info;
{
/* Nintendo does this unconditionally, whether or not the actual unmap succeeds. */
context->SetNrrInfoInUse(nrr_info, false);
std::memset(nrr_info, 0, sizeof(*nrr_info));
}
R_RETURN(UnmapNrr(context->GetProcessHandle(), nrr_backup.mapped_header, nrr_backup.nrr_heap_address, nrr_backup.nrr_heap_size, nrr_backup.mapped_code_address));
}
Result MapManualLoadModuleMemory(u64 *out_address, size_t context_id, u64 nro_address, u64 nro_size, u64 bss_address, u64 bss_size) {
/* Get context. */
ProcessContext *context = GetContextById(context_id);
AMS_ABORT_UNLESS(context != nullptr);
/* Validate address/size. */
R_TRY(ValidateAddressAndNonZeroSize(nro_address, nro_size));
R_TRY(ValidateAddressAndSize(bss_address, bss_size));
const u64 total_size = nro_size + bss_size;
R_UNLESS(total_size >= nro_size, ro::ResultInvalidSize());
R_UNLESS(total_size >= bss_size, ro::ResultInvalidSize());
/* Check we have space for a new NRO. */
NroInfo *nro_info = nullptr;
R_TRY(context->GetFreeNroInfo(std::addressof(nro_info)));
/* Map the NRO. */
R_TRY(MapNro(std::addressof(nro_info->base_address), context->GetProcessHandle(), nro_address, nro_size, bss_address, bss_size));
/* Parse the NRO. */
u64 nro_rx_size = 0, nro_ro_size = 0, nro_rw_size = 0, nro_bss_size = 0;
bool nro_aligned_header = false;
bool nro_is_compress = false;
R_TRY(context->ParseNro(std::addressof(nro_info->module_id), std::addressof(nro_rx_size), std::addressof(nro_ro_size), std::addressof(nro_rw_size), std::addressof(nro_bss_size), std::addressof(nro_aligned_header), std::addressof(nro_is_compress), nro_info->base_address, total_size, nro_size, bss_size));
ON_RESULT_FAILURE { R_DISCARD(UnmapNro(context->GetProcessHandle(), nro_info->base_address, nro_address, nro_size, bss_address, bss_size)); };
/* Set NRO perms. */
R_TRY(SetNroPerms(context->GetProcessHandle(), nro_info->base_address, nro_rx_size, nro_ro_size, nro_rw_size + nro_bss_size, nro_aligned_header));
ON_RESULT_FAILURE_2 { if (!nro_is_compress) { R_DISCARD(UnmapNro(context->GetProcessHandle(), nro_info->base_address, nro_address, nro_size, bss_address, bss_size)); } };
context->SetNroInfoInUse(nro_info, true);
nro_info->nro_heap_address = nro_address;
nro_info->nro_heap_size = nro_size;
nro_info->bss_heap_address = bss_address;
nro_info->bss_heap_size = bss_size;
if (hos::GetVersion() >= hos::Version_23_0_0) {
nro_info->code_size = nro_rx_size;
nro_info->ro_size = nro_ro_size;
} else {
nro_info->code_size = nro_rx_size + nro_ro_size;
nro_info->ro_size = 0;
}
nro_info->rw_size = nro_rw_size;
nro_info->is_compress = nro_is_compress;
*out_address = nro_info->base_address;
R_SUCCEED();
}
Result UnmapManualLoadModuleMemory(size_t context_id, u64 nro_address) {
/* Get context. */
ProcessContext *context = GetContextById(context_id);
AMS_ABORT_UNLESS(context != nullptr);
/* Validate address. */
R_UNLESS(util::IsAligned(nro_address, os::MemoryPageSize), ro::ResultInvalidAddress());
/* Check the NRO is loaded. */
NroInfo *nro_info = nullptr;
R_TRY(context->GetNroInfoByAddress(std::addressof(nro_info), nro_address));
/* Handle compression related mappings. */
if (nro_info->is_compress) {
const u64 code_address = nro_info->base_address + 0x1000;
const u64 code_size = nro_info->code_size - 0x1000;
/* Remove code region permissions. */
R_TRY(os::SetProcessMemoryPermission(context->GetProcessHandle(), code_address, code_size, os::MemoryPermission_None));
/* Map the code region. */
void *mapped_memory = nullptr;
R_TRY(os::MapProcessMemory(std::addressof(mapped_memory), context->GetProcessHandle(), code_address, code_size, ro::impl::GenerateSecureRandom));
/* Clear the memory. */
std::memset(mapped_memory, 0, code_size);
/* Unmap the code region. */
os::UnmapProcessMemory(mapped_memory, context->GetProcessHandle(), code_address, code_size);
}
/* Unmap. */
const NroInfo nro_backup = *nro_info;
{
/* Nintendo does this unconditionally, whether or not the actual unmap succeeds. */
context->SetNroInfoInUse(nro_info, false);
std::memset(nro_info, 0, sizeof(*nro_info));
}
if (hos::GetVersion() >= hos::Version_23_0_0) {
R_RETURN(UnmapNro(context->GetProcessHandle(), nro_backup.base_address, nro_backup.nro_heap_address, nro_backup.nro_heap_size, nro_backup.bss_heap_address, nro_backup.bss_heap_size));
} else {
R_RETURN(UnmapNro(context->GetProcessHandle(), nro_backup.base_address, nro_backup.nro_heap_address, nro_backup.code_size + nro_backup.rw_size, nro_backup.bss_heap_address, nro_backup.bss_heap_size));
}
}
/* Debug service implementations. */
Result GetProcessModuleInfo(u32 *out_count, ldr::ModuleInfo *out_infos, size_t max_out_count, os::ProcessId process_id) {
if (const ProcessContext *context = GetContextByProcessId(process_id); context != nullptr) {
context->GetProcessModuleInfo(out_count, out_infos, max_out_count);
}
R_SUCCEED();
}
}
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