mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-11-10 07:06:34 +00:00
124 lines
4.7 KiB
C++
124 lines
4.7 KiB
C++
/*
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* Copyright (c) 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 <stratosphere.hpp>
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namespace ams::hos {
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namespace {
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constinit os::SdkMutex g_hos_init_lock;
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constinit hos::Version g_hos_version;
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constinit bool g_set_hos_version;
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Result GetExosphereApiInfo(exosphere::ApiInfo *out) {
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u64 exosphere_cfg;
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R_TRY_CATCH(spl::impl::GetConfig(std::addressof(exosphere_cfg), spl::ConfigItem::ExosphereApiVersion)) {
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R_CATCH_RETHROW(spl::ResultSecureMonitorNotInitialized)
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} R_END_TRY_CATCH_WITH_ABORT_UNLESS;
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*out = { exosphere_cfg };
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return ResultSuccess();
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}
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Result GetApproximateExosphereApiInfo(exosphere::ApiInfo *out) {
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u64 exosphere_cfg;
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R_TRY_CATCH(spl::impl::GetConfig(std::addressof(exosphere_cfg), spl::ConfigItem::ExosphereApproximateApiVersion)) {
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R_CATCH_RETHROW(spl::ResultSecureMonitorBusy)
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} R_END_TRY_CATCH_WITH_ABORT_UNLESS;
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*out = { exosphere_cfg };
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return ResultSuccess();
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}
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exosphere::ApiInfo GetExosphereApiInfo(bool allow_approximate) {
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exosphere::ApiInfo info;
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while (true) {
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if (R_SUCCEEDED(GetExosphereApiInfo(std::addressof(info)))) {
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return info;
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}
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if (allow_approximate && R_SUCCEEDED(GetApproximateExosphereApiInfo(std::addressof(info)))) {
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return info;
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}
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svc::SleepThread(TimeSpan::FromMilliSeconds(25).GetNanoSeconds());
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}
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}
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}
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void InitializeVersionInternal(bool allow_approximate) {
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/* Get the current (and previous approximation of) target firmware. */
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hos::Version prev, current;
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bool has_prev = false;
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{
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/* Acquire exclusive access to set hos version. */
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std::scoped_lock lk(g_hos_init_lock);
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/* Save the previous value of g_hos_version. */
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prev = g_hos_version;
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has_prev = g_set_hos_version;
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/* Set hos version = exosphere api version target firmware. */
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g_hos_version = static_cast<hos::Version>(GetExosphereApiInfo(allow_approximate).GetTargetFirmware());
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/* Save the current value of g_hos_version. */
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current = g_hos_version;
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/* Note that we've set a previous hos version. */
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g_set_hos_version = true;
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}
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/* Ensure that this is a hos version we can sanely *try* to run. */
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/* To be friendly, we will only require that we recognize the major and minor versions. */
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/* We can consider only recognizing major in the future, but micro seems safe to ignore as */
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/* there are no breaking IPC changes in minor updates. */
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{
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constexpr u32 MaxMajor = (static_cast<u32>(hos::Version_Max) >> 24) & 0xFF;
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constexpr u32 MaxMinor = (static_cast<u32>(hos::Version_Max) >> 16) & 0xFF;
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const u32 major = (static_cast<u32>(current) >> 24) & 0xFF;
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const u32 minor = (static_cast<u32>(current) >> 16) & 0xFF;
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const bool is_safely_tryable_version = (current <= hos::Version_Max) || (major == MaxMajor && minor <= MaxMinor);
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AMS_ABORT_UNLESS(is_safely_tryable_version);
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}
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/* Ensure that this is a hos version compatible with previous approximations. */
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if (has_prev) {
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AMS_ABORT_UNLESS(current >= prev);
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const u32 current_major = (static_cast<u32>(current) >> 24) & 0xFF;
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const u32 prev_major = (static_cast<u32>(prev) >> 24) & 0xFF;
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AMS_ABORT_UNLESS(current_major == prev_major);
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}
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/* Set the version for libnx. */
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{
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const u32 major = (static_cast<u32>(current) >> 24) & 0xFF;
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const u32 minor = (static_cast<u32>(current) >> 16) & 0xFF;
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const u32 micro = (static_cast<u32>(current) >> 8) & 0xFF;
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hosversionSet((BIT(31)) | (MAKEHOSVERSION(major, minor, micro)));
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}
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}
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::ams::hos::Version GetVersion() {
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return g_hos_version;
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}
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}
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