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kern: implement SvcCreateThread, SvcStartThread

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This commit is contained in:
Michael Scire 2020-07-09 18:54:09 -07:00
parent 9503aae522
commit 7f4c6ae9e7
5 changed files with 95 additions and 6 deletions
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68
libraries/libmesosphere/source/svc/kern_svc_thread.cpp
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@ -21,6 +21,66 @@ namespace ams::kern::svc {
namespace {
constexpr bool IsValidCoreId(int32_t core_id) {
return (0 <= core_id && core_id < static_cast<int32_t>(cpu::NumCores));
}
Result CreateThread(ams::svc::Handle *out, ams::svc::ThreadFunc f, uintptr_t arg, uintptr_t stack_bottom, int32_t priority, int32_t core_id) {
/* Adjust core id, if it's the default magic. */
KProcess &process = GetCurrentProcess();
if (core_id == ams::svc::IdealCoreUseProcessValue) {
core_id = process.GetIdealCoreId();
}
/* Validate arguments. */
R_UNLESS(IsValidCoreId(core_id), svc::ResultInvalidCoreId());
R_UNLESS(((1ul << core_id) & process.GetCoreMask()) != 0, svc::ResultInvalidCoreId());
R_UNLESS(ams::svc::HighestThreadPriority <= priority && priority <= ams::svc::LowestThreadPriority, svc::ResultInvalidPriority());
R_UNLESS(process.CheckThreadPriority(priority), svc::ResultInvalidPriority());
/* Reserve a new session from the process resource limit (waiting up to 100ms). */
KScopedResourceReservation thread_reservation(std::addressof(process), ams::svc::LimitableResource_ThreadCountMax, 1, KHardwareTimer::GetTick() + ams::svc::Tick(TimeSpan::FromMilliSeconds(100)));
R_UNLESS(thread_reservation.Succeeded(), svc::ResultLimitReached());
/* Create the thread. */
KScopedAutoObject thread = KThread::Create();
R_UNLESS(thread.IsNotNull(), svc::ResultOutOfResource());
/* Initialize the thread. */
{
KScopedLightLock lk(process.GetStateLock());
R_TRY(KThread::InitializeUserThread(thread.GetPointerUnsafe(), reinterpret_cast<KThreadFunction>(static_cast<uintptr_t>(f)), arg, stack_bottom, priority, core_id, std::addressof(process)));
}
/* Commit the thread reservation. */
thread_reservation.Commit();
/* Clone the current fpu status to the new thread. */
thread->GetContext().CloneFpuStatus();
/* Register the new thread. */
R_TRY(KThread::Register(thread.GetPointerUnsafe()));
/* Add the thread to the handle table. */
R_TRY(process.GetHandleTable().Add(out, thread.GetPointerUnsafe()));
return ResultSuccess();
}
Result StartThread(ams::svc::Handle thread_handle) {
/* Get the thread from its handle. */
KScopedAutoObject thread = GetCurrentProcess().GetHandleTable().GetObject<KThread>(thread_handle);
R_UNLESS(thread.IsNotNull(), svc::ResultInvalidHandle());
/* Try to start the thread. */
R_TRY(thread->Run());
/* If we succeeded, persist a reference to the thread. */
thread->Open();
return ResultSuccess();
}
Result GetThreadPriority(int32_t *out_priority, ams::svc::Handle thread_handle) {
/* Get the thread from its handle. */
KScopedAutoObject thread = GetCurrentProcess().GetHandleTable().GetObject<KThread>(thread_handle);
@ -46,11 +106,11 @@ namespace ams::kern::svc {
/* ============================= 64 ABI ============================= */
Result CreateThread64(ams::svc::Handle *out_handle, ams::svc::ThreadFunc func, ams::svc::Address arg, ams::svc::Address stack_bottom, int32_t priority, int32_t core_id) {
MESOSPHERE_PANIC("Stubbed SvcCreateThread64 was called.");
return CreateThread(out_handle, func, arg, stack_bottom, priority, core_id);
}
Result StartThread64(ams::svc::Handle thread_handle) {
MESOSPHERE_PANIC("Stubbed SvcStartThread64 was called.");
return StartThread(thread_handle);
}
void ExitThread64() {
@ -100,11 +160,11 @@ namespace ams::kern::svc {
/* ============================= 64From32 ABI ============================= */
Result CreateThread64From32(ams::svc::Handle *out_handle, ams::svc::ThreadFunc func, ams::svc::Address arg, ams::svc::Address stack_bottom, int32_t priority, int32_t core_id) {
MESOSPHERE_PANIC("Stubbed SvcCreateThread64From32 was called.");
return CreateThread(out_handle, func, arg, stack_bottom, priority, core_id);
}
Result StartThread64From32(ams::svc::Handle thread_handle) {
MESOSPHERE_PANIC("Stubbed SvcStartThread64From32 was called.");
return StartThread(thread_handle);
}
void ExitThread64From32() {