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https://github.com/Atmosphere-NX/Atmosphere-libs.git
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86 lines
3.2 KiB
C++
86 lines
3.2 KiB
C++
/*
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* Copyright (c) 2018-2019 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 <switch.h>
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#include <stratosphere.hpp>
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#include <stratosphere/cfg.hpp>
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namespace sts::cfg {
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namespace {
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/* Convenience definitions. */
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constexpr u64 InitialProcessIdMinDeprecated = 0x00;
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constexpr u64 InitialProcessIdMaxDeprecated = 0x50;
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/* Privileged process globals. */
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HosMutex g_lock;
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bool g_detected_privileged_process = false;
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bool g_is_privileged_process = false;
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/* SD card helpers. */
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void GetPrivilegedProcessIdRange(u64 *out_min, u64 *out_max) {
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u64 min = 0, max = 0;
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if (GetRuntimeFirmwareVersion() >= FirmwareVersion_500) {
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/* On 5.0.0+, we can get precise limits from svcGetSystemInfo. */
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R_ASSERT(svcGetSystemInfo(&min, SystemInfoType_InitialProcessIdRange, INVALID_HANDLE, InitialProcessIdRangeInfo_Minimum));
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R_ASSERT(svcGetSystemInfo(&max, SystemInfoType_InitialProcessIdRange, INVALID_HANDLE, InitialProcessIdRangeInfo_Maximum));
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} else if (GetRuntimeFirmwareVersion() >= FirmwareVersion_400) {
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/* On 4.0.0-4.1.0, we can get the precise limits from normal svcGetInfo. */
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R_ASSERT(svcGetInfo(&min, InfoType_InitialProcessIdRange, INVALID_HANDLE, InitialProcessIdRangeInfo_Minimum));
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R_ASSERT(svcGetInfo(&max, InfoType_InitialProcessIdRange, INVALID_HANDLE, InitialProcessIdRangeInfo_Maximum));
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} else {
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/* On < 4.0.0, we just use hardcoded extents. */
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min = InitialProcessIdMinDeprecated;
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max = InitialProcessIdMaxDeprecated;
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}
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*out_min = min;
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*out_max = max;
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}
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u64 GetCurrentProcessId() {
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u64 process_id = 0;
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R_ASSERT(svcGetProcessId(&process_id, CUR_PROCESS_HANDLE));
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return process_id;
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}
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void DetectIsPrivilegedProcess() {
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u64 min = 0, max = 0, cur = 0;
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GetPrivilegedProcessIdRange(&min, &max);
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cur = GetCurrentProcessId();
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g_is_privileged_process = min <= cur && cur <= max;
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g_detected_privileged_process = true;
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}
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}
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/* SD card utilities. */
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bool IsPrivilegedProcess() {
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std::scoped_lock<HosMutex> lk(g_lock);
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/* If we've already detected, return cached result. */
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if (!g_detected_privileged_process) {
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DetectIsPrivilegedProcess();
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}
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/* Determine if we're privileged, and return. */
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return g_is_privileged_process;
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}
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}
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