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

571 lines
25 KiB
C++

/*
* Copyright (c) 2018-2020 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_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 rw_size;
ModuleId module_id;
};
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 ProcessContext {
bool nro_in_use[MaxNroInfos];
bool nrr_in_use[MaxNrrInfos];
NroInfo nro_infos[MaxNroInfos];
NrrInfo nrr_infos[MaxNrrInfos];
Handle process_handle;
os::ProcessId process_id;
bool in_use;
ncm::ProgramId GetProgramId(Handle other_process_h) const {
/* Automatically select a handle, allowing for override. */
Handle process_h = this->process_handle;
if (other_process_h != INVALID_HANDLE) {
process_h = other_process_h;
}
ncm::ProgramId program_id = ncm::InvalidProgramId;
if (hos::GetVersion() >= hos::Version_3_0_0) {
/* 3.0.0+: Use svcGetInfo. */
R_ABORT_UNLESS(svcGetInfo(&program_id.value, InfoType_ProgramId, process_h, 0));
} else {
/* 1.0.0-2.3.0: We're not inside loader, so ask pm. */
R_ABORT_UNLESS(pm::info::GetProgramId(&program_id, os::GetProcessId(process_h)));
}
return program_id;
}
Result GetNrrInfoByAddress(NrrInfo **out, u64 nrr_heap_address) {
for (size_t i = 0; i < MaxNrrInfos; i++) {
if (this->nrr_in_use[i] && this->nrr_infos[i].nrr_heap_address == nrr_heap_address) {
if (out != nullptr) {
*out = &this->nrr_infos[i];
}
return ResultSuccess();
}
}
return ResultNotRegistered();
}
Result GetFreeNrrInfo(NrrInfo **out) {
for (size_t i = 0; i < MaxNrrInfos; i++) {
if (!this->nrr_in_use[i]) {
if (out != nullptr) {
*out = &this->nrr_infos[i];
}
return ResultSuccess();
}
}
return ResultTooManyNrr();
}
Result GetNroInfoByAddress(NroInfo **out, u64 nro_address) {
for (size_t i = 0; i < MaxNroInfos; i++) {
if (this->nro_in_use[i] && this->nro_infos[i].base_address == nro_address) {
if (out != nullptr) {
*out = &this->nro_infos[i];
}
return ResultSuccess();
}
}
return ResultNotLoaded();
}
Result GetNroInfoByModuleId(NroInfo **out, const ModuleId *module_id) {
for (size_t i = 0; i < MaxNroInfos; i++) {
if (this->nro_in_use[i] && std::memcmp(&this->nro_infos[i].module_id, module_id, sizeof(*module_id)) == 0) {
if (out != nullptr) {
*out = &this->nro_infos[i];
}
return ResultSuccess();
}
}
return ResultNotLoaded();
}
Result GetFreeNroInfo(NroInfo **out) {
for (size_t i = 0; i < MaxNroInfos; i++) {
if (!this->nro_in_use[i]) {
if (out != nullptr) {
*out = &this->nro_infos[i];
}
return ResultSuccess();
}
}
return ResultTooManyNro();
}
Result ValidateHasNroHash(const NroHeader *nro_header) const {
/* Calculate hash. */
Sha256Hash hash;
crypto::GenerateSha256Hash(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 (!this->nrr_in_use[i]) {
continue;
}
/* Get the mapped header, ensure that it has hashes. */
const NrrHeader *mapped_nrr_header = this->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(this->nrr_infos[i].signed_area_hash);
const void *signed_area = this->nrr_infos[i].cached_signed_area;
const size_t signed_area_size = this->nrr_infos[i].cached_signed_area_size;
const size_t hashes_offset = this->nrr_infos[i].cached_hashes_offset;
const size_t num_hashes = this->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! */
return ResultSuccess();
}
return ResultNotAuthorized();
}
Result ValidateNro(ModuleId *out_module_id, u64 *out_rx_size, u64 *out_ro_size, u64 *out_rw_size, u64 base_address, u64 expected_nro_size, u64 expected_bss_size) {
/* Find space to map the NRO. */
uintptr_t map_address;
R_UNLESS(R_SUCCEEDED(map::LocateMappableSpace(&map_address, expected_nro_size)), ResultOutOfAddressSpace());
/* Actually map the NRO. */
map::AutoCloseMap nro_map(map_address, this->process_handle, base_address, expected_nro_size);
R_TRY(nro_map.GetResult());
/* Validate header. */
const NroHeader *header = reinterpret_cast<const NroHeader *>(map_address);
R_UNLESS(header->IsMagicValid(), 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 sizes meet expected. */
R_UNLESS(nro_size == expected_nro_size, ResultInvalidNro());
R_UNLESS(bss_size == expected_bss_size, ResultInvalidNro());
/* Validate all sizes are aligned. */
R_UNLESS(util::IsAligned(text_size, os::MemoryPageSize), ResultInvalidNro());
R_UNLESS(util::IsAligned(ro_size, os::MemoryPageSize), ResultInvalidNro());
R_UNLESS(util::IsAligned(rw_size, os::MemoryPageSize), ResultInvalidNro());
R_UNLESS(util::IsAligned(bss_size, os::MemoryPageSize), ResultInvalidNro());
/* Validate sections are in order. */
R_UNLESS(text_ofs <= ro_ofs, ResultInvalidNro());
R_UNLESS(ro_ofs <= rw_ofs, ResultInvalidNro());
/* Validate sections are sequential and contiguous. */
R_UNLESS(text_ofs == 0, ResultInvalidNro());
R_UNLESS(text_ofs + text_size == ro_ofs, ResultInvalidNro());
R_UNLESS(ro_ofs + ro_size == rw_ofs, ResultInvalidNro());
R_UNLESS(rw_ofs + rw_size == nro_size, 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)), ResultAlreadyLoaded());
/* Apply patches to NRO. */
LocateAndApplyIpsPatchesToModule(module_id, reinterpret_cast<u8 *>(map_address), nro_size);
/* Copy to output. */
*out_module_id = *module_id;
*out_rx_size = text_size;
*out_ro_size = ro_size;
*out_rw_size = rw_size;
return ResultSuccess();
}
void SetNrrInfoInUse(const NrrInfo *info, bool in_use) {
AMS_ASSERT(std::addressof(this->nrr_infos[0]) <= info && info <= std::addressof(this->nrr_infos[MaxNrrInfos - 1]));
const size_t index = info - std::addressof(this->nrr_infos[0]);
this->nrr_in_use[index] = in_use;
}
void SetNroInfoInUse(const NroInfo *info, bool in_use) {
AMS_ASSERT(std::addressof(this->nro_infos[0]) <= info && info <= std::addressof(this->nro_infos[MaxNroInfos - 1]));
const size_t index = info - std::addressof(this->nro_infos[0]);
this->nro_in_use[index] = in_use;
}
};
/* Globals. */
ProcessContext g_process_contexts[MaxSessions] = {};
bool g_is_development_hardware = false;
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].process_id == process_id) {
return &g_process_contexts[i];
}
}
return nullptr;
}
size_t AllocateContext(Handle 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->in_use) {
std::memset(context, 0, sizeof(*context));
context->process_id = process_id;
context->process_handle = process_handle;
context->in_use = true;
return i;
}
}
/* Failure to find a free context is actually an abort condition. */
AMS_ABORT_UNLESS(false);
}
void FreeContext(size_t context_id) {
ProcessContext *context = GetContextById(context_id);
if (context != nullptr) {
if (context->process_handle != INVALID_HANDLE) {
for (size_t i = 0; i < MaxNrrInfos; i++) {
if (context->nrr_in_use[i]) {
UnmapNrr(context->process_handle, context->nrr_infos[i].mapped_header, context->nrr_infos[i].nrr_heap_address, context->nrr_infos[i].nrr_heap_size, context->nrr_infos[i].mapped_code_address);
}
}
svcCloseHandle(context->process_handle);
}
std::memset(context, 0, sizeof(*context));
context->in_use = false;
}
}
constexpr inline Result ValidateAddressAndNonZeroSize(u64 address, u64 size) {
R_UNLESS(util::IsAligned(address, os::MemoryPageSize), ResultInvalidAddress());
R_UNLESS(size != 0, ResultInvalidSize());
R_UNLESS(util::IsAligned(size, os::MemoryPageSize), ResultInvalidSize());
R_UNLESS(address < address + size, ResultInvalidSize());
return ResultSuccess();
}
constexpr inline Result ValidateAddressAndSize(u64 address, u64 size) {
R_UNLESS(util::IsAligned(address, os::MemoryPageSize), ResultInvalidAddress());
R_UNLESS(util::IsAligned(size, os::MemoryPageSize), ResultInvalidSize());
R_UNLESS(size == 0 || address < address + size, ResultInvalidSize());
return ResultSuccess();
}
}
/* 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(&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, os::ManagedHandle process_handle, os::ProcessId process_id) {
/* Validate process handle. */
{
os::ProcessId handle_pid = os::InvalidProcessId;
/* Validate handle is a valid process handle. */
R_UNLESS(R_SUCCEEDED(os::TryGetProcessId(&handle_pid, process_handle.Get())), ResultInvalidProcess());
/* Validate process id. */
R_UNLESS(handle_pid == process_id, ResultInvalidProcess());
}
/* Check if a process context already exists. */
R_UNLESS(GetContextByProcessId(process_id) == nullptr, ResultInvalidSession());
*out_context_id = AllocateContext(process_handle.Move(), process_id);
return ResultSuccess();
}
Result ValidateProcess(size_t context_id, os::ProcessId process_id) {
const ProcessContext *ctx = GetContextById(context_id);
R_UNLESS(ctx != nullptr, ResultInvalidProcess());
R_UNLESS(ctx->process_id == process_id, ResultInvalidProcess());
return ResultSuccess();
}
void UnregisterProcess(size_t context_id) {
FreeContext(context_id);
}
/* Service implementations. */
Result RegisterModuleInfo(size_t context_id, os::ManagedHandle 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.Get());
/* 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(&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(&header, &mapped_code_address, std::addressof(signed_area_hash), sizeof(signed_area_hash), context->process_handle, 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));
return ResultSuccess();
}
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), ResultInvalidAddress());
/* Check the NRR is loaded. */
NrrInfo *nrr_info = nullptr;
R_TRY(context->GetNrrInfoByAddress(&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));
}
return UnmapNrr(context->process_handle, 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, ResultInvalidSize());
R_UNLESS(total_size >= bss_size, ResultInvalidSize());
/* Check we have space for a new NRO. */
NroInfo *nro_info = nullptr;
R_TRY(context->GetFreeNroInfo(&nro_info));
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;
/* Map the NRO. */
R_TRY(MapNro(&nro_info->base_address, context->process_handle, nro_address, nro_size, bss_address, bss_size));
/* Validate the NRO (parsing region extents). */
u64 rx_size = 0, ro_size = 0, rw_size = 0;
{
auto unmap_guard = SCOPE_GUARD { UnmapNro(context->process_handle, nro_info->base_address, nro_address, bss_address, bss_size, nro_size, 0); };
R_TRY(context->ValidateNro(&nro_info->module_id, &rx_size, &ro_size, &rw_size, nro_info->base_address, nro_size, bss_size));
unmap_guard.Cancel();
}
/* Set NRO perms. */
{
auto unmap_guard = SCOPE_GUARD { UnmapNro(context->process_handle, nro_info->base_address, nro_address, bss_address, bss_size, rx_size + ro_size, rw_size); };
R_TRY(SetNroPerms(context->process_handle, nro_info->base_address, rx_size, ro_size, rw_size + bss_size));
unmap_guard.Cancel();
}
context->SetNroInfoInUse(nro_info, true);
nro_info->code_size = rx_size + ro_size;
nro_info->rw_size = rw_size;
*out_address = nro_info->base_address;
return ResultSuccess();
}
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), ResultInvalidAddress());
/* Check the NRO is loaded. */
NroInfo *nro_info = nullptr;
R_TRY(context->GetNroInfoByAddress(&nro_info, nro_address));
/* 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));
}
return UnmapNro(context->process_handle, nro_backup.base_address, nro_backup.nro_heap_address, nro_backup.bss_heap_address, nro_backup.bss_heap_size, nro_backup.code_size, nro_backup.rw_size);
}
/* Debug service implementations. */
Result GetProcessModuleInfo(u32 *out_count, LoaderModuleInfo *out_infos, size_t max_out_count, os::ProcessId process_id) {
size_t count = 0;
const ProcessContext *context = GetContextByProcessId(process_id);
if (context != nullptr) {
for (size_t i = 0; i < MaxNroInfos && count < max_out_count; i++) {
if (!context->nro_in_use[i]) {
continue;
}
const NroInfo *nro_info = &context->nro_infos[i];
/* Just copy out the info. */
LoaderModuleInfo *out_info = &out_infos[count++];
memcpy(out_info->build_id, &nro_info->module_id, sizeof(nro_info->module_id));
out_info->base_address = nro_info->base_address;
out_info->size = nro_info->nro_heap_size + nro_info->bss_heap_size;
}
}
*out_count = static_cast<u32>(count);
return ResultSuccess();
}
}