Atmosphere/stratosphere/libstratosphere/source/cfg/cfg_privileged_process.cpp

95 lines
3.6 KiB
C++

/*
* Copyright (c) 2018-2019 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 <switch.h>
#include <stratosphere.hpp>
#include <stratosphere/cfg.hpp>
namespace sts::cfg {
namespace {
/* Convenience definitions. */
constexpr u64 InitialProcessIdMinDeprecated = 0x00;
constexpr u64 InitialProcessIdMaxDeprecated = 0x50;
/* Privileged process globals. */
os::Mutex g_lock;
bool g_got_privileged_process_status = false;
u64 g_min_initial_process_id = 0, g_max_initial_process_id = 0;
u64 g_cur_process_id = 0;
/* SD card helpers. */
void GetPrivilegedProcessIdRange(u64 *out_min, u64 *out_max) {
u64 min = 0, max = 0;
if (ams::GetRuntimeFirmwareVersion() >= FirmwareVersion_500) {
/* On 5.0.0+, we can get precise limits from svcGetSystemInfo. */
R_ASSERT(svcGetSystemInfo(&min, SystemInfoType_InitialProcessIdRange, INVALID_HANDLE, InitialProcessIdRangeInfo_Minimum));
R_ASSERT(svcGetSystemInfo(&max, SystemInfoType_InitialProcessIdRange, INVALID_HANDLE, InitialProcessIdRangeInfo_Maximum));
} else if (ams::GetRuntimeFirmwareVersion() >= FirmwareVersion_400) {
/* On 4.0.0-4.1.0, we can get the precise limits from normal svcGetInfo. */
R_ASSERT(svcGetInfo(&min, InfoType_InitialProcessIdRange, INVALID_HANDLE, InitialProcessIdRangeInfo_Minimum));
R_ASSERT(svcGetInfo(&max, InfoType_InitialProcessIdRange, INVALID_HANDLE, InitialProcessIdRangeInfo_Maximum));
} else {
/* On < 4.0.0, we just use hardcoded extents. */
min = InitialProcessIdMinDeprecated;
max = InitialProcessIdMaxDeprecated;
}
*out_min = min;
*out_max = max;
}
u64 GetCurrentProcessId() {
u64 process_id = 0;
R_ASSERT(svcGetProcessId(&process_id, CUR_PROCESS_HANDLE));
return process_id;
}
void GetPrivilegedProcessStatus() {
GetPrivilegedProcessIdRange(&g_min_initial_process_id, &g_max_initial_process_id);
g_cur_process_id = GetCurrentProcessId();
g_got_privileged_process_status = true;
}
}
/* Privileged Process utilities. */
bool IsInitialProcess() {
std::scoped_lock lk(g_lock);
/* If we've not detected, do detection. */
if (!g_got_privileged_process_status) {
GetPrivilegedProcessStatus();
}
/* Determine if we're privileged, and return. */
return g_min_initial_process_id <= g_cur_process_id && g_cur_process_id <= g_max_initial_process_id;
}
void GetInitialProcessRange(u64 *out_min, u64 *out_max) {
std::scoped_lock lk(g_lock);
/* If we've not detected, do detection. */
if (!g_got_privileged_process_status) {
GetPrivilegedProcessStatus();
}
*out_min = g_min_initial_process_id;
*out_max = g_max_initial_process_id;
}
}