mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-09-20 07:08:59 +00:00
571 lines
25 KiB
C++
571 lines
25 KiB
C++
/*
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* Copyright (c) 2018-2020 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "ro_nrr_utils.hpp"
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#include "ro_nro_utils.hpp"
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#include "ro_patcher.hpp"
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#include "ro_service_impl.hpp"
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namespace ams::ro::impl {
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namespace {
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/* Convenience definitions. */
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constexpr size_t MaxSessions = 0x3; /* 2 official sessions (applet + application, 1 homebrew session). */
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constexpr size_t MaxNrrInfos = 0x40;
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constexpr size_t MaxNroInfos = 0x40;
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/* Types. */
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struct Sha256Hash {
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u8 hash[crypto::Sha256Generator::HashSize];
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bool operator==(const Sha256Hash &o) const {
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return std::memcmp(this, std::addressof(o), sizeof(*this)) == 0;
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}
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bool operator!=(const Sha256Hash &o) const {
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return std::memcmp(this, std::addressof(o), sizeof(*this)) != 0;
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}
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bool operator<(const Sha256Hash &o) const {
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return std::memcmp(this, std::addressof(o), sizeof(*this)) < 0;
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}
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bool operator>(const Sha256Hash &o) const {
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return std::memcmp(this, std::addressof(o), sizeof(*this)) > 0;
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}
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};
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static_assert(sizeof(Sha256Hash) == sizeof(Sha256Hash::hash));
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struct NroInfo {
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u64 base_address;
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u64 nro_heap_address;
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u64 nro_heap_size;
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u64 bss_heap_address;
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u64 bss_heap_size;
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u64 code_size;
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u64 rw_size;
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ModuleId module_id;
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};
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struct NrrInfo {
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const NrrHeader *mapped_header;
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u64 nrr_heap_address;
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u64 nrr_heap_size;
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u64 mapped_code_address;
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/* Verification. */
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u32 cached_signed_area_size;
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u32 cached_hashes_offset;
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u32 cached_num_hashes;
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u8 cached_signed_area[sizeof(NrrHeader) - NrrHeader::GetSignedAreaOffset()];
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Sha256Hash signed_area_hash;
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};
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struct ProcessContext {
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bool nro_in_use[MaxNroInfos];
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bool nrr_in_use[MaxNrrInfos];
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NroInfo nro_infos[MaxNroInfos];
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NrrInfo nrr_infos[MaxNrrInfos];
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Handle process_handle;
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os::ProcessId process_id;
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bool in_use;
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ncm::ProgramId GetProgramId(Handle other_process_h) const {
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/* Automatically select a handle, allowing for override. */
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Handle process_h = this->process_handle;
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if (other_process_h != INVALID_HANDLE) {
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process_h = other_process_h;
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}
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ncm::ProgramId program_id = ncm::ProgramId::Invalid;
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if (hos::GetVersion() >= hos::Version_300) {
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/* 3.0.0+: Use svcGetInfo. */
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R_ABORT_UNLESS(svcGetInfo(&program_id.value, InfoType_ProgramId, process_h, 0));
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} else {
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/* 1.0.0-2.3.0: We're not inside loader, so ask pm. */
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R_ABORT_UNLESS(pm::info::GetProgramId(&program_id, os::GetProcessId(process_h)));
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}
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return program_id;
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}
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Result GetNrrInfoByAddress(NrrInfo **out, u64 nrr_heap_address) {
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for (size_t i = 0; i < MaxNrrInfos; i++) {
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if (this->nrr_in_use[i] && this->nrr_infos[i].nrr_heap_address == nrr_heap_address) {
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if (out != nullptr) {
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*out = &this->nrr_infos[i];
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}
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return ResultSuccess();
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}
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}
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return ResultNotRegistered();
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}
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Result GetFreeNrrInfo(NrrInfo **out) {
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for (size_t i = 0; i < MaxNrrInfos; i++) {
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if (!this->nrr_in_use[i]) {
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if (out != nullptr) {
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*out = &this->nrr_infos[i];
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}
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return ResultSuccess();
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}
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}
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return ResultTooManyNrr();
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}
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Result GetNroInfoByAddress(NroInfo **out, u64 nro_address) {
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for (size_t i = 0; i < MaxNroInfos; i++) {
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if (this->nro_in_use[i] && this->nro_infos[i].base_address == nro_address) {
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if (out != nullptr) {
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*out = &this->nro_infos[i];
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}
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return ResultSuccess();
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}
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}
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return ResultNotLoaded();
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}
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Result GetNroInfoByModuleId(NroInfo **out, const ModuleId *module_id) {
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for (size_t i = 0; i < MaxNroInfos; i++) {
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if (this->nro_in_use[i] && std::memcmp(&this->nro_infos[i].module_id, module_id, sizeof(*module_id)) == 0) {
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if (out != nullptr) {
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*out = &this->nro_infos[i];
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}
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return ResultSuccess();
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}
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}
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return ResultNotLoaded();
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}
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Result GetFreeNroInfo(NroInfo **out) {
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for (size_t i = 0; i < MaxNroInfos; i++) {
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if (!this->nro_in_use[i]) {
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if (out != nullptr) {
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*out = &this->nro_infos[i];
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}
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return ResultSuccess();
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}
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}
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return ResultTooManyNro();
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}
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Result ValidateHasNroHash(const NroHeader *nro_header) const {
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/* Calculate hash. */
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Sha256Hash hash;
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crypto::GenerateSha256Hash(std::addressof(hash), sizeof(hash), nro_header, nro_header->GetSize());
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for (size_t i = 0; i < MaxNrrInfos; i++) {
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/* Ensure we only check NRRs that are used. */
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if (!this->nrr_in_use[i]) {
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continue;
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}
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/* Get the mapped header, ensure that it has hashes. */
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const NrrHeader *mapped_nrr_header = this->nrr_infos[i].mapped_header;
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const size_t mapped_num_hashes = mapped_nrr_header->GetNumHashes();
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if (mapped_num_hashes == 0) {
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continue;
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}
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/* Locate the hash within the mapped array. */
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const Sha256Hash *mapped_nro_hashes_start = reinterpret_cast<const Sha256Hash *>(mapped_nrr_header->GetHashes());
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const Sha256Hash *mapped_nro_hashes_end = mapped_nro_hashes_start + mapped_nrr_header->GetNumHashes();
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const Sha256Hash *mapped_lower_bound = std::lower_bound(mapped_nro_hashes_start, mapped_nro_hashes_end, hash);
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if (mapped_lower_bound == mapped_nro_hashes_end || (*mapped_lower_bound != hash)) {
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continue;
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}
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/* Check that the hash entry is valid, since our heuristic passed. */
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const void *nrr_hash = std::addressof(this->nrr_infos[i].signed_area_hash);
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const void *signed_area = this->nrr_infos[i].cached_signed_area;
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const size_t signed_area_size = this->nrr_infos[i].cached_signed_area_size;
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const size_t hashes_offset = this->nrr_infos[i].cached_hashes_offset;
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const size_t num_hashes = this->nrr_infos[i].cached_num_hashes;
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const u8 *hash_table = reinterpret_cast<const u8 *>(mapped_nro_hashes_start);
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if (!ValidateNrrHashTableEntry(signed_area, signed_area_size, hashes_offset, num_hashes, nrr_hash, hash_table, std::addressof(hash))) {
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continue;
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}
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/* The hash is valid! */
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return ResultSuccess();
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}
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return ResultNotAuthorized();
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}
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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) {
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/* Find space to map the NRO. */
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uintptr_t map_address;
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R_UNLESS(R_SUCCEEDED(map::LocateMappableSpace(&map_address, expected_nro_size)), ResultOutOfAddressSpace());
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/* Actually map the NRO. */
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map::AutoCloseMap nro_map(map_address, this->process_handle, base_address, expected_nro_size);
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R_TRY(nro_map.GetResult());
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/* Validate header. */
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const NroHeader *header = reinterpret_cast<const NroHeader *>(map_address);
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R_UNLESS(header->IsMagicValid(), ResultInvalidNro());
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/* Read sizes from header. */
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const u64 nro_size = header->GetSize();
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const u64 text_ofs = header->GetTextOffset();
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const u64 text_size = header->GetTextSize();
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const u64 ro_ofs = header->GetRoOffset();
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const u64 ro_size = header->GetRoSize();
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const u64 rw_ofs = header->GetRwOffset();
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const u64 rw_size = header->GetRwSize();
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const u64 bss_size = header->GetBssSize();
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/* Validate sizes meet expected. */
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R_UNLESS(nro_size == expected_nro_size, ResultInvalidNro());
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R_UNLESS(bss_size == expected_bss_size, ResultInvalidNro());
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/* Validate all sizes are aligned. */
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R_UNLESS(util::IsAligned(text_size, os::MemoryPageSize), ResultInvalidNro());
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R_UNLESS(util::IsAligned(ro_size, os::MemoryPageSize), ResultInvalidNro());
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R_UNLESS(util::IsAligned(rw_size, os::MemoryPageSize), ResultInvalidNro());
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R_UNLESS(util::IsAligned(bss_size, os::MemoryPageSize), ResultInvalidNro());
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/* Validate sections are in order. */
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R_UNLESS(text_ofs <= ro_ofs, ResultInvalidNro());
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R_UNLESS(ro_ofs <= rw_ofs, ResultInvalidNro());
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/* Validate sections are sequential and contiguous. */
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R_UNLESS(text_ofs == 0, ResultInvalidNro());
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R_UNLESS(text_ofs + text_size == ro_ofs, ResultInvalidNro());
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R_UNLESS(ro_ofs + ro_size == rw_ofs, ResultInvalidNro());
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R_UNLESS(rw_ofs + rw_size == nro_size, ResultInvalidNro());
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/* Verify NRO hash. */
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R_TRY(this->ValidateHasNroHash(header));
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/* Check if NRO has already been loaded. */
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const ModuleId *module_id = header->GetModuleId();
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R_UNLESS(R_FAILED(this->GetNroInfoByModuleId(nullptr, module_id)), ResultAlreadyLoaded());
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/* Apply patches to NRO. */
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LocateAndApplyIpsPatchesToModule(module_id, reinterpret_cast<u8 *>(map_address), nro_size);
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/* Copy to output. */
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*out_module_id = *module_id;
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*out_rx_size = text_size;
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*out_ro_size = ro_size;
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*out_rw_size = rw_size;
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return ResultSuccess();
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}
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void SetNrrInfoInUse(const NrrInfo *info, bool in_use) {
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AMS_ASSERT(std::addressof(this->nrr_infos[0]) <= info && info <= std::addressof(this->nrr_infos[MaxNrrInfos - 1]));
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const size_t index = info - std::addressof(this->nrr_infos[0]);
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this->nrr_in_use[index] = in_use;
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}
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void SetNroInfoInUse(const NroInfo *info, bool in_use) {
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AMS_ASSERT(std::addressof(this->nro_infos[0]) <= info && info <= std::addressof(this->nro_infos[MaxNroInfos - 1]));
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const size_t index = info - std::addressof(this->nro_infos[0]);
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this->nro_in_use[index] = in_use;
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}
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};
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/* Globals. */
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ProcessContext g_process_contexts[MaxSessions] = {};
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bool g_is_development_hardware = false;
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bool g_is_development_function_enabled = false;
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/* Context Helpers. */
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ProcessContext *GetContextById(size_t context_id) {
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if (context_id == InvalidContextId) {
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return nullptr;
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}
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AMS_ABORT_UNLESS(context_id < MaxSessions);
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return &g_process_contexts[context_id];
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}
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ProcessContext *GetContextByProcessId(os::ProcessId process_id) {
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for (size_t i = 0; i < MaxSessions; i++) {
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if (g_process_contexts[i].process_id == process_id) {
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return &g_process_contexts[i];
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}
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}
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return nullptr;
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}
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size_t AllocateContext(Handle process_handle, os::ProcessId process_id) {
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/* Find a free process context. */
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for (size_t i = 0; i < MaxSessions; i++) {
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ProcessContext *context = &g_process_contexts[i];
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if (!context->in_use) {
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std::memset(context, 0, sizeof(*context));
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context->process_id = process_id;
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context->process_handle = process_handle;
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context->in_use = true;
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return i;
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}
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}
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/* Failure to find a free context is actually an abort condition. */
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AMS_ABORT_UNLESS(false);
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}
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void FreeContext(size_t context_id) {
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ProcessContext *context = GetContextById(context_id);
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if (context != nullptr) {
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if (context->process_handle != INVALID_HANDLE) {
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for (size_t i = 0; i < MaxNrrInfos; i++) {
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if (context->nrr_in_use[i]) {
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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);
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}
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}
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svcCloseHandle(context->process_handle);
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}
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std::memset(context, 0, sizeof(*context));
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context->in_use = false;
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}
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}
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constexpr inline Result ValidateAddressAndNonZeroSize(u64 address, u64 size) {
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R_UNLESS(util::IsAligned(address, os::MemoryPageSize), ResultInvalidAddress());
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R_UNLESS(size != 0, ResultInvalidSize());
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R_UNLESS(util::IsAligned(size, os::MemoryPageSize), ResultInvalidSize());
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R_UNLESS(address < address + size, ResultInvalidSize());
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return ResultSuccess();
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}
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constexpr inline Result ValidateAddressAndSize(u64 address, u64 size) {
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R_UNLESS(util::IsAligned(address, os::MemoryPageSize), ResultInvalidAddress());
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R_UNLESS(util::IsAligned(size, os::MemoryPageSize), ResultInvalidSize());
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R_UNLESS(size == 0 || address < address + size, ResultInvalidSize());
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return ResultSuccess();
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}
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}
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/* Access utilities. */
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void SetDevelopmentHardware(bool is_development_hardware) {
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g_is_development_hardware = is_development_hardware;
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}
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void SetDevelopmentFunctionEnabled(bool is_development_function_enabled) {
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g_is_development_function_enabled = is_development_function_enabled;
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}
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bool IsDevelopmentHardware() {
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return g_is_development_hardware;
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}
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bool IsDevelopmentFunctionEnabled() {
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return g_is_development_function_enabled;
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}
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bool ShouldEaseNroRestriction() {
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/* Retrieve whether we should ease restrictions from set:sys. */
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u8 should_ease = 0;
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if (settings::fwdbg::GetSettingsItemValue(&should_ease, sizeof(should_ease), "ro", "ease_nro_restriction") != sizeof(should_ease)) {
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return false;
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}
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/* Nintendo only allows easing restriction on dev, we will allow on production, as well. */
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/* should_ease &= IsDevelopmentFunctionEnabled(); */
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return should_ease != 0;
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}
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/* Context utilities. */
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Result RegisterProcess(size_t *out_context_id, Handle process_handle, os::ProcessId process_id) {
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/* Validate process handle. */
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{
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os::ProcessId handle_pid = os::InvalidProcessId;
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/* Validate handle is a valid process handle. */
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R_UNLESS(R_SUCCEEDED(os::TryGetProcessId(&handle_pid, process_handle)), ResultInvalidProcess());
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/* Validate process id. */
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R_UNLESS(handle_pid == process_id, ResultInvalidProcess());
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}
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/* Check if a process context already exists. */
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R_UNLESS(GetContextByProcessId(process_id) == nullptr, ResultInvalidSession());
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*out_context_id = AllocateContext(process_handle, process_id);
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return ResultSuccess();
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}
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Result ValidateProcess(size_t context_id, os::ProcessId process_id) {
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const ProcessContext *ctx = GetContextById(context_id);
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R_UNLESS(ctx != nullptr, ResultInvalidProcess());
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R_UNLESS(ctx->process_id == process_id, ResultInvalidProcess());
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return ResultSuccess();
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}
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void UnregisterProcess(size_t context_id) {
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FreeContext(context_id);
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}
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/* Service implementations. */
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Result LoadNrr(size_t context_id, Handle process_h, u64 nrr_address, u64 nrr_size, ModuleType expected_type, bool enforce_type) {
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/* Get context. */
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ProcessContext *context = GetContextById(context_id);
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AMS_ABORT_UNLESS(context != nullptr);
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/* Get program id. */
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const ncm::ProgramId program_id = context->GetProgramId(process_h);
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/* Validate address/size. */
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R_TRY(ValidateAddressAndNonZeroSize(nrr_address, nrr_size));
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/* Check we have space for a new NRR. */
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NrrInfo *nrr_info = nullptr;
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R_TRY(context->GetFreeNrrInfo(&nrr_info));
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/* Prepare to cache the NRR's signature hash. */
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Sha256Hash signed_area_hash;
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ON_SCOPE_EXIT { crypto::ClearMemory(std::addressof(signed_area_hash), sizeof(signed_area_hash)); };
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/* Map. */
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NrrHeader *header = nullptr;
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u64 mapped_code_address = 0;
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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, expected_type, enforce_type));
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/* Set NRR info. */
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context->SetNrrInfoInUse(nrr_info, true);
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nrr_info->mapped_header = header;
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nrr_info->nrr_heap_address = nrr_address;
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nrr_info->nrr_heap_size = nrr_size;
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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 UnloadNrr(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 LoadNro(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 UnloadNro(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();
|
|
}
|
|
|
|
}
|