[RISC-V] Enable R2RDump

Author: tomeksowi

src/coreclr/tools/r2rdump/CoreDisTools.cs

@@ -22,7 +22,8 @@ public enum TargetArch
             Target_X64,
             Target_Thumb,
             Target_Arm64,
-            Target_LoongArch64
+            Target_LoongArch64,
+            Target_RiscV64,
         };
 
         [DllImport(_dll, CallingConvention = CallingConvention.Cdecl)]
@@ -77,6 +78,9 @@ public static IntPtr GetDisasm(Machine machine)
                 case Machine.LoongArch64:
                     target = TargetArch.Target_LoongArch64;
                     break;
+                case Machine.RiscV64:
+                    target = TargetArch.Target_RiscV64;
+                    break;
                 default:
                     Program.WriteWarning($"{machine} not supported on CoreDisTools");
                     return IntPtr.Zero;
@@ -191,6 +195,10 @@ private void SetIndentations()
                     // Instructions are dumped as 4-byte hexadecimal integers
                     Machine.LoongArch64 => 4 * 2 + 1,
 
+                    // Instructions are dumped as 4-byte hexadecimal integers
+                    // TODO: update once RISC-V runtime supports "C" extension (compressed instructions)
+                    Machine.RiscV64 => 4 * 2 + 1,
+
                     _ => throw new NotImplementedException()
                 };
 
@@ -260,7 +268,8 @@ public int GetInstruction(RuntimeFunction rtf, int imageOffset, int rtfOffset, o
                     }
                     else
                     {
-                        if ((_reader.Machine == Machine.Arm64) || (_reader.Machine == Machine.LoongArch64))
+                        // TODO: update once RISC-V runtime supports "C" extension (compressed instructions)
+                        if (_reader.Machine is Machine.Arm64 or Machine.LoongArch64 or Machine.RiscV64)
                         {
                             // Replace " hh hh hh hh " byte dump with " hhhhhhhh ".
                             // CoreDisTools should be fixed to dump bytes this way for ARM64.

src/coreclr/tools/r2rdump/Program.cs

@@ -210,6 +210,7 @@ public void Dump(ReadyToRunReader r2r)
                     Machine.ArmThumb2 => TargetArchitecture.ARM,
                     Machine.Arm64 => TargetArchitecture.ARM64,
                     Machine.LoongArch64 => TargetArchitecture.LoongArch64,
+                    Machine.RiscV64 => TargetArchitecture.RiscV64,
                     _ => throw new NotImplementedException(r2r.Machine.ToString()),
                 };
                 TargetOS os = r2r.OperatingSystem switch

src/coreclr/tools/r2rdump/R2RDump.csproj

@@ -4,7 +4,7 @@
     <AssemblyVersion>1.0.0.0</AssemblyVersion>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <OutputType>Exe</OutputType>
-    <Platforms>x64;x86;arm64;arm;loongarch64</Platforms>
+    <Platforms>x64;x86;arm64;arm;loongarch64;riscv64</Platforms>
     <AssemblyKey>Open</AssemblyKey>
     <IsDotNetFrameworkProductAssembly>true</IsDotNetFrameworkProductAssembly>
     <TargetFramework>$(NetCoreAppToolCurrent)</TargetFramework>