32-bit debugger support

src/Ryujinx.HLE/Debugger/Debugger.cs

@@ -51,30 +51,14 @@ namespace Ryujinx.HLE.Debugger
         private KThread[] GetThreads() => DebugProcess.GetThreadUids().Select(x => DebugProcess.GetThread(x)).ToArray();
         private KernelContext KernelContext => Device.System.KernelContext;
 
-        const int GdbRegisterCount = 68;
+        const int GdbRegisterCount64 = 68;
+        const int GdbRegisterCount32 = 66;
+        /* FPCR = FPSR & ~FpcrMask
+        All of FPCR's bits are reserved in FPCR and vice versa,
+        see ARM's documentation. */
+        private const uint FpcrMask = 0xfc1fffff;
         
-        private int GdbRegisterHexSize(int gdbRegId)
-        {
-            switch (gdbRegId)
-            {
-                case >= 0 and <= 31:
-                    return 16;
-                case 32:
-                    return 16;
-                case 33:
-                    return 8;
-                case >= 34 and <= 65:
-                    return 32;
-                case 66:
-                    return 8;
-                case 67:
-                    return 8;
-                default:
-                    throw new ArgumentException();
-            }
-        }
-
-        private string GdbReadRegister(IExecutionContext state, int gdbRegId)
+        private string GdbReadRegister64(IExecutionContext state, int gdbRegId)
         {
             switch (gdbRegId)
             {
@@ -95,7 +79,7 @@ namespace Ryujinx.HLE.Debugger
             }
         }
 
-        private bool GdbWriteRegister(IExecutionContext state, int gdbRegId, StringStream ss)
+        private bool GdbWriteRegister64(IExecutionContext state, int gdbRegId, StringStream ss)
         {
             switch (gdbRegId)
             {
@@ -107,7 +91,7 @@ namespace Ryujinx.HLE.Debugger
                     }
                 case 32:
                     {
-                        ulong value = ss.ReadLengthAsHex(8);
+                        ulong value = ss.ReadLengthAsHex(16);
                         state.DebugPc = value;
                         return true;
                     }
@@ -141,6 +125,83 @@ namespace Ryujinx.HLE.Debugger
             }
         }
 
+        private string GdbReadRegister32(IExecutionContext state, int gdbRegId)
+        {
+            switch (gdbRegId)
+            {
+                case >= 0 and <= 14:
+                    return ToHex(BitConverter.GetBytes((uint)state.GetX(gdbRegId)));
+                case 15:
+                    return ToHex(BitConverter.GetBytes((uint)state.DebugPc));
+                case 16:
+                    return ToHex(BitConverter.GetBytes((uint)state.Pstate));
+                case >= 17 and <= 32:
+                    return ToHex(state.GetV(gdbRegId - 17).ToArray());
+                case >= 33 and <= 64:
+                    int reg = (gdbRegId - 33);
+                    int n = reg / 2;
+                    int shift = reg % 2;
+                    ulong value = state.GetV(n).Extract<ulong>(shift);
+                    return ToHex(BitConverter.GetBytes(value));
+                case 65:
+                    uint fpscr = (uint)state.Fpsr | (uint)state.Fpcr;
+                    return ToHex(BitConverter.GetBytes(fpscr));
+                default:
+                    return null;
+            }
+        }
+
+        private bool GdbWriteRegister32(IExecutionContext state, int gdbRegId, StringStream ss)
+        {
+            switch (gdbRegId)
+            {
+                case >= 0 and <= 14:
+                    {
+                        ulong value = ss.ReadLengthAsHex(8);
+                        state.SetX(gdbRegId, value);
+                        return true;
+                    }
+                case 15:
+                    {
+                        ulong value = ss.ReadLengthAsHex(8);
+                        state.DebugPc = value;
+                        return true;
+                    }
+                case 16:
+                    {
+                        ulong value = ss.ReadLengthAsHex(8);
+                        state.Pstate = (uint)value;
+                        return true;
+                    }
+                case >= 17 and <= 32:
+                    {
+                        ulong value0 = ss.ReadLengthAsHex(16);
+                        ulong value1 = ss.ReadLengthAsHex(16);
+                        state.SetV(gdbRegId - 17, new V128(value0, value1));
+                        return true;
+                    }
+                case >= 33 and <= 64:
+                    {
+                        ulong value = ss.ReadLengthAsHex(16);
+                        int regId = (gdbRegId - 33);
+                        int regNum = regId / 2;
+                        int shift = regId % 2;
+                        V128 reg = state.GetV(regNum);
+                        reg.Insert(shift, value);
+                        return true;
+                    }
+                case 65:
+                    {
+                        ulong value = ss.ReadLengthAsHex(8);
+                        state.Fpsr = (uint)value & FpcrMask;
+                        state.Fpcr = (uint)value & ~FpcrMask;
+                        return true;
+                    }
+                default:
+                    return false;
+            }
+        }
+
         private void MessageHandlerMain()
         {
             while (!_shuttingDown)
@@ -266,16 +327,32 @@ namespace Ryujinx.HLE.Debugger
                     }
 
                     if (ss.ConsumeRemaining("HostInfo"))
+                    {
+                        if (IsProcessAarch32())
+                        {
+                            Reply(
+                                $"triple:{ToHex("arm-unknown-linux-android")};endian:little;ptrsize:4;hostname:{ToHex("Ryujinx")};");
+                        }
+                        else
                         {
                             Reply(
                                 $"triple:{ToHex("aarch64-unknown-linux-android")};endian:little;ptrsize:8;hostname:{ToHex("Ryujinx")};");
+                        }
                         break;
                     }
 
                     if (ss.ConsumeRemaining("ProcessInfo"))
+                    {
+                        if (IsProcessAarch32())
+                        {
+                            Reply(
+                                $"pid:1;cputype:12;cpusubtype:0;triple:{ToHex("arm-unknown-linux-android")};ostype:unknown;vendor:none;endian:little;ptrsize:4;");
+                        }
+                        else
                         {
                             Reply(
                                 $"pid:1;cputype:100000c;cpusubtype:0;triple:{ToHex("aarch64-unknown-linux-android")};ostype:unknown;vendor:none;endian:little;ptrsize:8;");
+                        }
                         break;
                     }
 
@@ -323,6 +400,11 @@ namespace Ryujinx.HLE.Debugger
                         ulong addr = ss.ReadUntilAsHex(',');
                         ulong len = ss.ReadRemainingAsHex();
 
+                        if (feature == "target.xml")
+                        {
+                            feature = IsProcessAarch32() ? "target32.xml" : "target64.xml";
+                        }
+
                         string data;
                         if (RegisterInformation.Features.TryGetValue(feature, out data))
                         {
@@ -410,9 +492,19 @@ namespace Ryujinx.HLE.Debugger
 
             var ctx = DebugProcess.GetThread(gThread.Value).Context;
             string registers = "";
-            for (int i = 0; i < GdbRegisterCount; i++)
+            if (IsProcessAarch32())
             {
-                registers += GdbReadRegister(ctx, i);
+                for (int i = 0; i < GdbRegisterCount32; i++)
+                {
+                    registers += GdbReadRegister32(ctx, i);
+                }
+            }
+            else
+            {
+                for (int i = 0; i < GdbRegisterCount64; i++)
+                {
+                    registers += GdbReadRegister64(ctx, i);
+                }
             }
 
             Reply(registers);
@@ -427,14 +519,28 @@ namespace Ryujinx.HLE.Debugger
             }
 
             var ctx = DebugProcess.GetThread(gThread.Value).Context;
-            for (int i = 0; i < GdbRegisterCount; i++)
+            if (IsProcessAarch32())
             {
-                if (!GdbWriteRegister(ctx, i, ss))
+                for (int i = 0; i < GdbRegisterCount32; i++)
+                {
+                    if (!GdbWriteRegister32(ctx, i, ss))
                     {
                         ReplyError();
                         return;
                     }
                 }
+            }
+            else
+            {
+                for (int i = 0; i < GdbRegisterCount64; i++)
+                {
+                    if (!GdbWriteRegister64(ctx, i, ss))
+                    {
+                        ReplyError();
+                        return;
+                    }
+                }
+            }
 
             if (ss.IsEmpty())
             {
@@ -512,7 +618,10 @@ namespace Ryujinx.HLE.Debugger
             }
 
             var ctx = DebugProcess.GetThread(gThread.Value).Context;
-            string result = GdbReadRegister(ctx, gdbRegId);
+            string result;
+            if (IsProcessAarch32())
+            {
+                result = GdbReadRegister32(ctx, gdbRegId);
                 if (result != null)
                 {
                     Reply(result);
@@ -522,6 +631,19 @@ namespace Ryujinx.HLE.Debugger
                     ReplyError();
                 }
             }
+            else
+            {
+                result = GdbReadRegister64(ctx, gdbRegId);
+                if (result != null)
+                {
+                    Reply(result);
+                }
+                else
+                {
+                    ReplyError();
+                }
+            }
+        }
 
         void CommandWriteRegister(int gdbRegId, StringStream ss)
         {
@@ -532,7 +654,9 @@ namespace Ryujinx.HLE.Debugger
             }
 
             var ctx = DebugProcess.GetThread(gThread.Value).Context;
-            if (GdbWriteRegister(ctx, gdbRegId, ss) && ss.IsEmpty())
+            if (IsProcessAarch32())
+            {
+                if (GdbWriteRegister32(ctx, gdbRegId, ss) && ss.IsEmpty())
                 {
                     ReplyOK();
                 }
@@ -541,6 +665,18 @@ namespace Ryujinx.HLE.Debugger
                     ReplyError();
                 }
             }
+            else
+            {
+                if (GdbWriteRegister64(ctx, gdbRegId, ss) && ss.IsEmpty())
+                {
+                    ReplyOK();
+                }
+                else
+                {
+                    ReplyError();
+                }
+            }
+        }
 
         private void CommandStep(ulong? newPc)
         {
@@ -675,6 +811,11 @@ namespace Ryujinx.HLE.Debugger
             }
         }
 
+        private bool IsProcessAarch32()
+        {
+            return DebugProcess.GetThread(gThread.Value).Context.IsAarch32;
+        }
+
         private byte CalculateChecksum(string cmd)
         {
             byte checksum = 0;

src/Ryujinx.HLE/Debugger/GdbXml/arm-core.xml

@@ -0,0 +1,27 @@
+<?xml version="1.0"?>
+<!-- Copyright (C) 2008 Free Software Foundation, Inc.
+
+     Copying and distribution of this file, with or without modification,
+     are permitted in any medium without royalty provided the copyright
+     notice and this notice are preserved.  -->
+
+<!DOCTYPE feature SYSTEM "gdb-target.dtd">
+<feature name="org.gnu.gdb.arm.core">
+  <reg name="r0" bitsize="32"/>
+  <reg name="r1" bitsize="32"/>
+  <reg name="r2" bitsize="32"/>
+  <reg name="r3" bitsize="32"/>
+  <reg name="r4" bitsize="32"/>
+  <reg name="r5" bitsize="32"/>
+  <reg name="r6" bitsize="32"/>
+  <reg name="r7" bitsize="32"/>
+  <reg name="r8" bitsize="32"/>
+  <reg name="r9" bitsize="32"/>
+  <reg name="r10" bitsize="32"/>
+  <reg name="r11" bitsize="32"/>
+  <reg name="r12" bitsize="32"/>
+  <reg name="sp" bitsize="32" type="data_ptr"/>
+  <reg name="lr" bitsize="32"/>
+  <reg name="pc" bitsize="32" type="code_ptr"/>
+  <reg name="cpsr" bitsize="32" />
+</feature>

src/Ryujinx.HLE/Debugger/GdbXml/arm-neon.xml

@@ -0,0 +1,86 @@
+<?xml version="1.0"?>
+<!-- Copyright (C) 2008 Free Software Foundation, Inc.
+
+     Copying and distribution of this file, with or without modification,
+     are permitted in any medium without royalty provided the copyright
+     notice and this notice are preserved.  -->
+<!DOCTYPE feature SYSTEM "gdb-target.dtd">
+<feature name="org.gnu.gdb.arm.vfp">
+  <vector id="neon_uint8x8" type="uint8" count="8"/>
+  <vector id="neon_uint16x4" type="uint16" count="4"/>
+  <vector id="neon_uint32x2" type="uint32" count="2"/>
+  <vector id="neon_float32x2" type="ieee_single" count="2"/>
+  <union id="neon_d">
+    <field name="u8" type="neon_uint8x8"/>
+    <field name="u16" type="neon_uint16x4"/>
+    <field name="u32" type="neon_uint32x2"/>
+    <field name="u64" type="uint64"/>
+    <field name="f32" type="neon_float32x2"/>
+    <field name="f64" type="ieee_double"/>
+  </union>
+  <vector id="neon_uint8x16" type="uint8" count="16"/>
+  <vector id="neon_uint16x8" type="uint16" count="8"/>
+  <vector id="neon_uint32x4" type="uint32" count="4"/>
+  <vector id="neon_uint64x2" type="uint64" count="2"/>
+  <vector id="neon_float32x4" type="ieee_single" count="4"/>
+  <vector id="neon_float64x2" type="ieee_double" count="2"/>
+  <union id="neon_q">
+    <field name="u8" type="neon_uint8x16"/>
+    <field name="u16" type="neon_uint16x8"/>
+    <field name="u32" type="neon_uint32x4"/>
+    <field name="u64" type="neon_uint64x2"/>
+    <field name="f32" type="neon_float32x4"/>
+    <field name="f64" type="neon_float64x2"/>
+  </union>
+  <reg name="d0" bitsize="64" type="neon_d"/>
+  <reg name="d1" bitsize="64" type="neon_d"/>
+  <reg name="d2" bitsize="64" type="neon_d"/>
+  <reg name="d3" bitsize="64" type="neon_d"/>
+  <reg name="d4" bitsize="64" type="neon_d"/>
+  <reg name="d5" bitsize="64" type="neon_d"/>
+  <reg name="d6" bitsize="64" type="neon_d"/>
+  <reg name="d7" bitsize="64" type="neon_d"/>
+  <reg name="d8" bitsize="64" type="neon_d"/>
+  <reg name="d9" bitsize="64" type="neon_d"/>
+  <reg name="d10" bitsize="64" type="neon_d"/>
+  <reg name="d11" bitsize="64" type="neon_d"/>
+  <reg name="d12" bitsize="64" type="neon_d"/>
+  <reg name="d13" bitsize="64" type="neon_d"/>
+  <reg name="d14" bitsize="64" type="neon_d"/>
+  <reg name="d15" bitsize="64" type="neon_d"/>
+  <reg name="d16" bitsize="64" type="neon_d"/>
+  <reg name="d17" bitsize="64" type="neon_d"/>
+  <reg name="d18" bitsize="64" type="neon_d"/>
+  <reg name="d19" bitsize="64" type="neon_d"/>
+  <reg name="d20" bitsize="64" type="neon_d"/>
+  <reg name="d21" bitsize="64" type="neon_d"/>
+  <reg name="d22" bitsize="64" type="neon_d"/>
+  <reg name="d23" bitsize="64" type="neon_d"/>
+  <reg name="d24" bitsize="64" type="neon_d"/>
+  <reg name="d25" bitsize="64" type="neon_d"/>
+  <reg name="d26" bitsize="64" type="neon_d"/>
+  <reg name="d27" bitsize="64" type="neon_d"/>
+  <reg name="d28" bitsize="64" type="neon_d"/>
+  <reg name="d29" bitsize="64" type="neon_d"/>
+  <reg name="d30" bitsize="64" type="neon_d"/>
+  <reg name="d31" bitsize="64" type="neon_d"/>
+
+  <reg name="q0" bitsize="128" type="neon_q"/>
+  <reg name="q1" bitsize="128" type="neon_q"/>
+  <reg name="q2" bitsize="128" type="neon_q"/>
+  <reg name="q3" bitsize="128" type="neon_q"/>
+  <reg name="q4" bitsize="128" type="neon_q"/>
+  <reg name="q5" bitsize="128" type="neon_q"/>
+  <reg name="q6" bitsize="128" type="neon_q"/>
+  <reg name="q7" bitsize="128" type="neon_q"/>
+  <reg name="q8" bitsize="128" type="neon_q"/>
+  <reg name="q9" bitsize="128" type="neon_q"/>
+  <reg name="q10" bitsize="128" type="neon_q"/>
+  <reg name="q11" bitsize="128" type="neon_q"/>
+  <reg name="q12" bitsize="128" type="neon_q"/>
+  <reg name="q13" bitsize="128" type="neon_q"/>
+  <reg name="q14" bitsize="128" type="neon_q"/>
+  <reg name="q15" bitsize="128" type="neon_q"/>
+
+  <reg name="fpscr" bitsize="32" type="int" group="float"/>
+</feature>

src/Ryujinx.HLE/Debugger/GdbXml/target32.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0"?>
+<!-- Copyright (C) 2009-2013 Free Software Foundation, Inc.
+     Contributed by ARM Ltd.
+
+     Copying and distribution of this file, with or without modification,
+     are permitted in any medium without royalty provided the copyright
+     notice and this notice are preserved.  -->
+
+<!DOCTYPE target SYSTEM "gdb-target.dtd">
+<target>
+  <architecture>arm</architecture>
+  <xi:include href="arm-core.xml"/>
+  <xi:include href="arm-neon.xml"/>
+</target>

src/Ryujinx.HLE/Debugger/RegisterInformation.cs

@@ -7,9 +7,12 @@ namespace Ryujinx.HLE.Debugger
     {
         public static readonly Dictionary<string, string> Features = new()
         {
-            { "target.xml", GetEmbeddedResourceContent("target.xml") },
+            { "target64.xml", GetEmbeddedResourceContent("target64.xml") },
+            { "target32.xml", GetEmbeddedResourceContent("target32.xml") },
             { "aarch64-core.xml", GetEmbeddedResourceContent("aarch64-core.xml") },
             { "aarch64-fpu.xml", GetEmbeddedResourceContent("aarch64-fpu.xml") },
+            { "arm-core.xml", GetEmbeddedResourceContent("arm-core.xml") },
+            { "arm-neon.xml", GetEmbeddedResourceContent("arm-neon.xml") },
         };
 
         private static string GetEmbeddedResourceContent(string resourceName)

src/Ryujinx.HLE/Ryujinx.HLE.csproj

@@ -32,7 +32,10 @@
   <ItemGroup>
     <None Remove="Debugger\GdbXml\aarch64-core.xml" />
     <None Remove="Debugger\GdbXml\aarch64-fpu.xml" />
-    <None Remove="Debugger\GdbXml\target.xml" />
+    <None Remove="Debugger\GdbXml\arm-core.xml" />
+    <None Remove="Debugger\GdbXml\arm-neon.xml" />
+    <None Remove="Debugger\GdbXml\target64.xml" />
+    <None Remove="Debugger\GdbXml\target32.xml" />
     <None Remove="Homebrew.npdm" />
     <None Remove="HOS\Applets\SoftwareKeyboard\Resources\Logo_Ryujinx.png" />
     <None Remove="HOS\Applets\SoftwareKeyboard\Resources\Icon_BtnA.png" />
@@ -44,7 +47,10 @@
   <ItemGroup>
     <EmbeddedResource Include="Debugger\GdbXml\aarch64-core.xml" />
     <EmbeddedResource Include="Debugger\GdbXml\aarch64-fpu.xml" />
-    <EmbeddedResource Include="Debugger\GdbXml\target.xml" />
+    <EmbeddedResource Include="Debugger\GdbXml\arm-core.xml" />
+    <EmbeddedResource Include="Debugger\GdbXml\arm-neon.xml" />
+    <EmbeddedResource Include="Debugger\GdbXml\target64.xml" />
+    <EmbeddedResource Include="Debugger\GdbXml\target32.xml" />
     <EmbeddedResource Include="Homebrew.npdm" />
     <EmbeddedResource Include="HOS\Applets\SoftwareKeyboard\Resources\Logo_Ryujinx.png" />
     <EmbeddedResource Include="HOS\Applets\SoftwareKeyboard\Resources\Icon_BtnA.png" />