mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-12-30 14:16:02 +00:00
70 lines
2.2 KiB
C++
70 lines
2.2 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 <exosphere.hpp>
|
|
#include "../secmon_error.hpp"
|
|
#include "secmon_smc_se_lock.hpp"
|
|
|
|
namespace ams::secmon::smc {
|
|
|
|
namespace {
|
|
|
|
constinit std::atomic_bool g_is_locked = false;
|
|
|
|
}
|
|
|
|
bool TryLockSecurityEngine() {
|
|
bool value = false;
|
|
return g_is_locked.compare_exchange_strong(value, true);
|
|
}
|
|
|
|
void UnlockSecurityEngine() {
|
|
g_is_locked = false;
|
|
}
|
|
|
|
bool IsSecurityEngineLocked() {
|
|
return g_is_locked;
|
|
}
|
|
|
|
SmcResult LockSecurityEngineAndInvoke(SmcArguments &args, SmcHandler impl) {
|
|
/* Try to lock the security engine. */
|
|
SMC_R_UNLESS(TryLockSecurityEngine(), Busy);
|
|
ON_SCOPE_EXIT { UnlockSecurityEngine(); };
|
|
|
|
return impl(args);
|
|
}
|
|
|
|
SmcResult LockSecurityEngineAndInvokeAsync(SmcArguments &args, SmcHandler impl, GetResultHandler result_handler) {
|
|
/* Try to lock the security engine. */
|
|
SMC_R_UNLESS(TryLockSecurityEngine(), Busy);
|
|
auto se_guard = SCOPE_GUARD { UnlockSecurityEngine(); };
|
|
|
|
/* Try to start an async operation. */
|
|
const u64 async_key = BeginAsyncOperation(result_handler);
|
|
SMC_R_UNLESS(async_key != InvalidAsyncKey, Busy);
|
|
auto async_guard = SCOPE_GUARD { CancelAsyncOperation(async_key); };
|
|
|
|
/* Try to invoke the operation. */
|
|
SMC_R_TRY(impl(args));
|
|
|
|
/* We succeeded! Cancel our guards, and return the async key to our caller. */
|
|
async_guard.Cancel();
|
|
se_guard.Cancel();
|
|
|
|
args.r[1] = async_key;
|
|
return SmcResult::Success;
|
|
}
|
|
|
|
}
|