Make HLE disposable safely (#850)

* Make HLE disposable safely

This fix the oldest issue with the HLE code: the kernel side
disposability.

Changelog:

- Implement KProcess::UnpauseAndTerminateAllThreadsExcept, KThread::Terminate, KThread::TerminateCurrentProcess, KThread::PrepareForTermiation and the svc post handler accurately.
- Implement svcTerminateProcess and svcExitProcess. (both untested)
- Fix KHandleTable::Destroy not decrementing refcount of all objects stored in the table.
- Spawn a custom KProcess with the maximum priority to terminate every guest KProcess. (terminating kernel emulation safely)
- General system stability improvements to enhance the user's experience.

* Fix a typo in a comment in KProcess.cs

* Address gdk's comments

1 files changed, 2 insertions, 1 deletions

diff --git a/Ryujinx.HLE/HOS/Kernel/SupervisorCall/SvcTable.cs b/Ryujinx.HLE/HOS/Kernel/SupervisorCall/SvcTable.cs
index 9ec0931a..1c2121f0 100644
--- a/Ryujinx.HLE/HOS/Kernel/SupervisorCall/SvcTable.cs
+++ b/Ryujinx.HLE/HOS/Kernel/SupervisorCall/SvcTable.cs
@@ -74,7 +74,8 @@ namespace Ryujinx.HLE.HOS.Kernel.SupervisorCall
                 { 0x72, nameof(SvcHandler.ConnectToPort64)                 },
                 { 0x73, nameof(SvcHandler.SetProcessMemoryPermission64)    },
                 { 0x77, nameof(SvcHandler.MapProcessCodeMemory64)          },
-                { 0x78, nameof(SvcHandler.UnmapProcessCodeMemory64)        }
+                { 0x78, nameof(SvcHandler.UnmapProcessCodeMemory64)        },
+                { 0x7B, nameof(SvcHandler.TerminateProcess64)              }
             };
 
             _svcTable64 = new Action<SvcHandler, ExecutionContext>[0x80];