From 09a63ba2b50e2d76ef83d7de72575dec2f3e04b0 Mon Sep 17 00:00:00 2001
From: merry <git@mary.rs>
Date: Sun, 13 Feb 2022 16:43:55 +0000
Subject: [PATCH] Notify debugger on BRK instruction

# Conflicts:
#	src/Ryujinx.HLE/Debugger/Debugger.cs
#	src/Ryujinx.HLE/Debugger/Message/ThreadBreakMessage.cs
#	src/Ryujinx.HLE/HOS/Kernel/Process/KProcess.cs
---
 src/Ryujinx.HLE/Debugger/Debugger.cs          | 19 +++++++++++++++++--
 .../Debugger/Message/ThreadBreakMessage.cs    | 18 ++++++++++++++++++
 src/Ryujinx.HLE/FileSystem/ContentManager.cs  |  2 +-
 .../HOS/Kernel/Process/KProcess.cs            |  9 ++++++++-
 4 files changed, 44 insertions(+), 4 deletions(-)
 create mode 100644 src/Ryujinx.HLE/Debugger/Message/ThreadBreakMessage.cs

diff --git a/src/Ryujinx.HLE/Debugger/Debugger.cs b/src/Ryujinx.HLE/Debugger/Debugger.cs
index a5a60cf7c..7c9815d60 100644
--- a/src/Ryujinx.HLE/Debugger/Debugger.cs
+++ b/src/Ryujinx.HLE/Debugger/Debugger.cs
@@ -1,4 +1,4 @@
-using Ryujinx.Common;
+using Ryujinx.Common;
 using Ryujinx.Common.Logging;
 using Ryujinx.Memory;
 using System;
@@ -8,6 +8,7 @@ using System.Net;
 using System.Net.Sockets;
 using System.Text;
 using System.Threading;
+using IExecutionContext = Ryujinx.Cpu.IExecutionContext;
 
 namespace Ryujinx.HLE.Debugger
 {
@@ -134,6 +135,11 @@ namespace Ryujinx.HLE.Debugger
                         WriteStream.WriteByte((byte)'+');
                         ProcessCommand(cmd);
                         break;
+
+                    case ThreadBreakMessage msg:
+                        HaltApplication();
+                        Reply($"T05thread:{msg.Context.ThreadUid:x};");
+                        break;
                 }
             }
         }
@@ -641,5 +647,14 @@ namespace Ryujinx.HLE.Debugger
                 HandlerThread.Join();
             }
         }
+
+        public void ThreadBreak(IExecutionContext ctx, ulong address, int imm)
+        {
+            ctx.DebugStop();
+
+            Logger.Notice.Print(LogClass.GdbStub, $"Break hit on thread {ctx.ThreadUid} at pc {address:x016}");
+
+            Messages.Add(new ThreadBreakMessage(ctx, address, imm));
+        }
     }
-}
\ No newline at end of file
+}
diff --git a/src/Ryujinx.HLE/Debugger/Message/ThreadBreakMessage.cs b/src/Ryujinx.HLE/Debugger/Message/ThreadBreakMessage.cs
new file mode 100644
index 000000000..ac0ecdefb
--- /dev/null
+++ b/src/Ryujinx.HLE/Debugger/Message/ThreadBreakMessage.cs
@@ -0,0 +1,18 @@
+using IExecutionContext = Ryujinx.Cpu.IExecutionContext;
+
+namespace Ryujinx.HLE.Debugger
+{
+    public class ThreadBreakMessage : IMessage
+    {
+        public IExecutionContext Context { get; }
+        public ulong Address { get; }
+        public int Opcode { get; }
+
+        public ThreadBreakMessage(IExecutionContext context, ulong address, int opcode)
+        {
+            Context = context;
+            Address = address;
+            Opcode = opcode;
+        }
+    }
+}
diff --git a/src/Ryujinx.HLE/FileSystem/ContentManager.cs b/src/Ryujinx.HLE/FileSystem/ContentManager.cs
index e6c0fce08..ff9bef55b 100644
--- a/src/Ryujinx.HLE/FileSystem/ContentManager.cs
+++ b/src/Ryujinx.HLE/FileSystem/ContentManager.cs
@@ -964,4 +964,4 @@ namespace Ryujinx.HLE.FileSystem
             return null;
         }
     }
-}
+}
\ No newline at end of file
diff --git a/src/Ryujinx.HLE/HOS/Kernel/Process/KProcess.cs b/src/Ryujinx.HLE/HOS/Kernel/Process/KProcess.cs
index c18fadf8d..31a8ab916 100644
--- a/src/Ryujinx.HLE/HOS/Kernel/Process/KProcess.cs
+++ b/src/Ryujinx.HLE/HOS/Kernel/Process/KProcess.cs
@@ -730,9 +730,16 @@ namespace Ryujinx.HLE.HOS.Kernel.Process
 
         public IExecutionContext CreateExecutionContext()
         {
+            ExceptionCallback breakCallback = null;
+
+            if (KernelContext.Device.Configuration.EnableGdbStub)
+            {
+                breakCallback = KernelContext.Device.Debugger.ThreadBreak;
+            }
+
             return Context?.CreateExecutionContext(new ExceptionCallbacks(
                 InterruptHandler,
-                null,
+                breakCallback,
                 KernelContext.SyscallHandler.SvcCall,
                 UndefinedInstructionHandler));
         }