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268 lines
12 KiB
C++
268 lines
12 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 <exosphere.hpp>
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#include "../secmon_error.hpp"
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#include "../secmon_misc.hpp"
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#include "secmon_smc_common.hpp"
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#include "secmon_smc_handler.hpp"
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#include "secmon_smc_aes.hpp"
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#include "secmon_smc_carveout.hpp"
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#include "secmon_smc_device_unique_data.hpp"
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#include "secmon_smc_error.hpp"
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#include "secmon_smc_info.hpp"
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#include "secmon_smc_memory_access.hpp"
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#include "secmon_smc_power_management.hpp"
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#include "secmon_smc_random.hpp"
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#include "secmon_smc_register_access.hpp"
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#include "secmon_smc_result.hpp"
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#include "secmon_smc_rsa.hpp"
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namespace ams::secmon::smc {
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namespace {
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struct HandlerInfo {
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u32 function_id;
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u32 restriction_mask;
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SmcHandler handler;
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};
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struct HandlerTable {
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const HandlerInfo *entries;
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size_t count;
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};
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enum HandlerType : int {
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HandlerType_User = 0,
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HandlerType_Kern = 1,
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HandlerType_Count = 2,
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};
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enum Restriction {
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Restriction_None = (0 << 0),
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Restriction_Normal = (1 << 0),
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Restriction_DeviceUniqueDataNotAllowed = (1 << 1),
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Restriction_SafeModeNotAllowed = (1 << 2),
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};
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enum SmcCallRange {
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SmcCallRange_ArmArch = 0,
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SmcCallRange_Cpu = 1,
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SmcCallRange_Sip = 2,
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SmcCallRange_Oem = 3,
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SmcCallRange_Standard = 4,
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SmcCallRange_TrustedApp = 0x30,
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};
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enum SmcArgumentType {
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ArgumentType_Integer = 0,
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ArgumentType_Pointer = 1,
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};
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enum SmcConvention {
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Convention_Smc32 = 0,
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Convention_Smc64 = 1,
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};
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enum SmcCallType {
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SmcCallType_YieldingCall = 0,
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SmcCallType_FastCall = 1,
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};
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struct SmcFunctionId {
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using FunctionId = util::BitPack64::Field< 0, 8, u32>;
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using ArgumentType0 = util::BitPack64::Field< 8, 1, SmcArgumentType>;
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using ArgumentType1 = util::BitPack64::Field< 9, 1, SmcArgumentType>;
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using ArgumentType2 = util::BitPack64::Field<10, 1, SmcArgumentType>;
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using ArgumentType3 = util::BitPack64::Field<11, 1, SmcArgumentType>;
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using ArgumentType4 = util::BitPack64::Field<12, 1, SmcArgumentType>;
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using ArgumentType5 = util::BitPack64::Field<13, 1, SmcArgumentType>;
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using ArgumentType6 = util::BitPack64::Field<14, 1, SmcArgumentType>;
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using ArgumentType7 = util::BitPack64::Field<15, 1, SmcArgumentType>;
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using Reserved = util::BitPack64::Field<16, 8, u32>;
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using CallRange = util::BitPack64::Field<24, 6, SmcCallRange>;
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using Convention = util::BitPack64::Field<30, 1, SmcConvention>;
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using CallType = util::BitPack64::Field<31, 1, SmcCallType>;
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using Reserved2 = util::BitPack64::Field<32, 32, u32>;
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};
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constinit HandlerInfo g_user_handlers[] = {
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{ 0x00000000, Restriction_SafeModeNotAllowed, nullptr },
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{ 0xC3000401, Restriction_SafeModeNotAllowed, SmcSetConfig },
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{ 0xC3000002, Restriction_Normal, SmcGetConfigUser },
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{ 0xC3000003, Restriction_Normal, SmcGetResult },
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{ 0xC3000404, Restriction_Normal, SmcGetResultData },
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{ 0xC3000E05, Restriction_SafeModeNotAllowed, SmcModularExponentiate },
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{ 0xC3000006, Restriction_Normal, SmcGenerateRandomBytes },
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{ 0xC3000007, Restriction_Normal, SmcGenerateAesKek },
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{ 0xC3000008, Restriction_Normal, SmcLoadAesKey },
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{ 0xC3000009, Restriction_Normal, SmcComputeAes },
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{ 0xC300000A, Restriction_Normal, SmcGenerateSpecificAesKey },
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{ 0xC300040B, Restriction_Normal, SmcComputeCmac },
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{ 0xC300D60C, Restriction_Normal, SmcReencryptDeviceUniqueData },
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{ 0xC300100D, Restriction_DeviceUniqueDataNotAllowed, SmcDecryptDeviceUniqueData },
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{ 0xC300000E, Restriction_SafeModeNotAllowed, nullptr },
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{ 0xC300060F, Restriction_DeviceUniqueDataNotAllowed, SmcModularExponentiateByStorageKey },
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{ 0xC3000610, Restriction_SafeModeNotAllowed, SmcPrepareEsDeviceUniqueKey },
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{ 0xC3000011, Restriction_SafeModeNotAllowed, SmcLoadPreparedAesKey },
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{ 0xC3000012, Restriction_SafeModeNotAllowed, SmcPrepareEsCommonTitleKey }
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};
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/* Deprecated handlerss. */
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constexpr inline const HandlerInfo DecryptAndImportEsDeviceKeyHandlerInfo = {
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0xC300100C, Restriction_Normal, SmcDecryptAndImportEsDeviceKey
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};
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constexpr inline const HandlerInfo DecryptAndImportLotusKeyHandlerInfo = {
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0xC300100E, Restriction_SafeModeNotAllowed, SmcDecryptAndImportLotusKey
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};
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constinit HandlerInfo g_kern_handlers[] = {
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{ 0x00000000, Restriction_SafeModeNotAllowed, nullptr },
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{ 0xC4000001, Restriction_SafeModeNotAllowed, SmcSuspendCpu },
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{ 0x84000002, Restriction_SafeModeNotAllowed, SmcPowerOffCpu },
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{ 0xC4000003, Restriction_SafeModeNotAllowed, SmcPowerOnCpu },
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{ 0xC3000004, Restriction_Normal, SmcGetConfigKern },
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{ 0xC3000005, Restriction_Normal, SmcGenerateRandomBytesNonBlocking },
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{ 0xC3000006, Restriction_Normal, SmcShowError },
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{ 0xC3000007, Restriction_Normal, SmcSetKernelCarveoutRegion },
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{ 0xC3000008, Restriction_Normal, SmcReadWriteRegister },
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/* NOTE: Atmosphere extension for mesosphere. This ID is subject to change at any time. */
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{ 0xC3000409, Restriction_Normal, SmcSetConfig },
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};
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constinit HandlerInfo g_ams_handlers[] = {
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{ 0x00000000, Restriction_SafeModeNotAllowed, nullptr },
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{ 0xF0000201, Restriction_None, SmcIramCopy },
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{ 0xF0000002, Restriction_None, SmcReadWriteRegister },
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{ 0xF0000003, Restriction_None, SmcWriteAddress },
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{ 0xF0000404, Restriction_None, SmcGetEmummcConfig },
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};
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constexpr const HandlerInfo GetSecureDataHandlerInfo = {
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0x67891234, Restriction_None, SmcGetSecureData
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};
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constinit HandlerTable g_handler_tables[] = {
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{ g_user_handlers, util::size(g_user_handlers) },
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{ g_kern_handlers, util::size(g_kern_handlers) },
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};
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constinit HandlerTable g_ams_handler_table = {
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g_ams_handlers, util::size(g_ams_handlers)
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};
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NORETURN void InvalidSmcError(u64 id) {
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SetError(pkg1::ErrorInfo_UnknownSmc);
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AMS_ABORT("Invalid SMC: %lx", id);
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}
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const HandlerTable &GetHandlerTable(HandlerType type, u64 id) {
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/* Ensure we have a valid handler type. */
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if (AMS_UNLIKELY(!(0 <= type && type < HandlerType_Count))) {
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InvalidSmcError(id);
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}
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/* Provide support for legacy SmcGetSecureData. */
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if (id == GetSecureDataHandlerInfo.function_id) {
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return g_handler_tables[HandlerType_User];
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}
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/* Check if we're a user SMC. */
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if (type == HandlerType_User) {
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/* Nintendo uses OEM SMCs. */
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/* We will assign Atmosphere extension SMCs the TrustedApplication range. */
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if (util::BitPack64{id}.Get<SmcFunctionId::CallRange>() == SmcCallRange_TrustedApp) {
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return g_ams_handler_table;
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}
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/* If we're not performing an atmosphere extension smc, require that we're being invoked by spl on core 3. */
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if (AMS_UNLIKELY(hw::GetCurrentCoreId() != 3)) {
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InvalidSmcError(id);
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}
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}
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return g_handler_tables[type];
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}
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const HandlerInfo &GetHandlerInfo(const HandlerTable &table, u64 id) {
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/* Provide support for legacy SmcGetSecureData. */
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if (id == GetSecureDataHandlerInfo.function_id) {
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return GetSecureDataHandlerInfo;
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}
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/* Get and check the index. */
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const auto index = util::BitPack64{id}.Get<SmcFunctionId::FunctionId>();
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if (AMS_UNLIKELY(index >= table.count)) {
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InvalidSmcError(id);
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}
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/* Get and check the handler info. */
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const auto &handler_info = table.entries[index];
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/* Check that the handler isn't null. */
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if (AMS_UNLIKELY(handler_info.handler == nullptr)) {
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InvalidSmcError(id);
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}
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/* Check that the handler's id matches. */
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if (AMS_UNLIKELY(handler_info.function_id != id)) {
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InvalidSmcError(id);
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}
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return handler_info;
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}
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bool IsHandlerRestricted(const HandlerInfo &info) {
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return (info.restriction_mask & secmon::GetRestrictedSmcMask()) != 0;
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}
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SmcResult InvokeSmcHandler(const HandlerInfo &info, SmcArguments &args) {
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/* Check if the smc is restricted. */
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if (GetTargetFirmware() >= TargetFirmware_8_0_0 && AMS_UNLIKELY(IsHandlerRestricted(info))) {
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return SmcResult::NotPermitted;
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}
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/* Invoke the smc. */
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return info.handler(args);
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}
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}
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void ConfigureSmcHandlersForTargetFirmware() {
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const auto target_fw = GetTargetFirmware();
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if (target_fw < TargetFirmware_5_0_0) {
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g_user_handlers[DecryptAndImportEsDeviceKeyHandlerInfo.function_id & 0xFF] = DecryptAndImportEsDeviceKeyHandlerInfo;
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g_user_handlers[DecryptAndImportLotusKeyHandlerInfo.function_id & 0xFF] = DecryptAndImportLotusKeyHandlerInfo;
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}
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}
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void HandleSmc(int type, SmcArguments &args) {
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/* Get the table. */
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const auto &table = GetHandlerTable(static_cast<HandlerType>(type), args.r[0]);
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/* Get the handler info. */
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const auto &info = GetHandlerInfo(table, args.r[0]);
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/* Set the invocation result. */
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args.r[0] = static_cast<u64>(InvokeSmcHandler(info, args));
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}
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}
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