Implement missing service calls in `pm` (#4210)

* Implement `GetTitleId`

Fixes #2516

* Null check + Proper result code

* Better comment

* Implement `GetApplicationProcessId`

* Add TODOs

* Update Ryujinx.HLE/HOS/Services/Pm/IInformationInterface.cs

Co-authored-by: Ac_K <Acoustik666@gmail.com>

* Update Ryujinx.HLE/HOS/Services/Pm/IDebugMonitorInterface.cs

Co-authored-by: Ac_K <Acoustik666@gmail.com>

* Remove new function from KernelStatic

Co-authored-by: Ac_K <Acoustik666@gmail.com>

Ryujinx.HLE/HOS/Kernel/KernelStatic.cs

@@ -1,5 +1,4 @@
-using Ryujinx.HLE.HOS.Kernel.Common;
-using Ryujinx.HLE.HOS.Kernel.Memory;
+using Ryujinx.HLE.HOS.Kernel.Memory;
 using Ryujinx.HLE.HOS.Kernel.Process;
 using Ryujinx.HLE.HOS.Kernel.Threading;
 using Ryujinx.Horizon.Common;
@@ -71,4 +70,4 @@ namespace Ryujinx.HLE.HOS.Kernel
             return null;
         }
     }
-}
+}

Ryujinx.HLE/HOS/Services/Pm/IDebugMonitorInterface.cs

@@ -10,6 +10,24 @@ namespace Ryujinx.HLE.HOS.Services.Pm
     {
         public IDebugMonitorInterface(ServiceCtx context) { }
 
+        [CommandHipc(4)]
+        // GetProgramId() -> sf::Out<ncm::ProgramId> out_process_id
+        public ResultCode GetApplicationProcessId(ServiceCtx context)
+        {
+            // TODO: Not correct as it shouldn't be directly using kernel objects here
+            foreach (KProcess process in context.Device.System.KernelContext.Processes.Values)
+            {
+                if (process.IsApplication)
+                {
+                    context.ResponseData.Write(process.Pid);
+
+                    return ResultCode.Success;
+                }
+            }
+
+            return ResultCode.ProcessNotFound;
+        }
+
         [CommandHipc(65000)]
         // AtmosphereGetProcessInfo(os::ProcessId process_id) -> sf::OutCopyHandle out_process_handle, sf::Out<ncm::ProgramLocation> out_loc, sf::Out<cfg::OverrideStatus> out_status
         public ResultCode GetProcessInfo(ServiceCtx context)

Ryujinx.HLE/HOS/Services/Pm/IInformationInterface.cs

@@ -1,8 +1,28 @@
-namespace Ryujinx.HLE.HOS.Services.Pm
+using Ryujinx.HLE.HOS.Kernel;
+using Ryujinx.HLE.HOS.Kernel.Process;
+
+namespace Ryujinx.HLE.HOS.Services.Pm
 {
     [Service("pm:info")]
     class IInformationInterface : IpcService
     {
         public IInformationInterface(ServiceCtx context) { }
+
+        [CommandHipc(0)]
+        // GetProgramId(os::ProcessId process_id) -> sf::Out<ncm::ProgramId> out
+        public ResultCode GetProgramId(ServiceCtx context)
+        {
+            ulong pid = context.RequestData.ReadUInt64();
+
+            // TODO: Not correct as it shouldn't be directly using kernel objects here
+            if (context.Device.System.KernelContext.Processes.TryGetValue(pid, out KProcess process))
+            {
+                context.ResponseData.Write(process.TitleId);
+
+                return ResultCode.Success;
+            }
+
+            return ResultCode.ProcessNotFound;
+        }
     }
 }

Ryujinx.HLE/HOS/Services/Pm/ResultCode.cs

@@ -0,0 +1,17 @@
+namespace Ryujinx.HLE.HOS.Services.Pm
+{
+    enum ResultCode
+    {
+        ModuleId       = 15,
+        ErrorCodeShift = 9,
+
+        Success = 0,
+
+        ProcessNotFound    = (1 << ErrorCodeShift) | ModuleId,
+        AlreadyStarted     = (2 << ErrorCodeShift) | ModuleId,
+        NotTerminated      = (3 << ErrorCodeShift) | ModuleId,
+        DebugHookInUse     = (4 << ErrorCodeShift) | ModuleId,
+        ApplicationRunning = (5 << ErrorCodeShift) | ModuleId,
+        InvalidSize        = (6 << ErrorCodeShift) | ModuleId,
+    }
+}