RISCV: add support for RISCV

Add support for RISCV64G (and partial support for RISCV32G and RISCV128G).  This
has been tested to work with RV64G in qemu and LLDB from LLVM main.

Author: compnerd

.gitignore

@@ -11,3 +11,8 @@
 # Output Directories
 /build/
 /html/
+
+# Generated Data
+/Definitions/RISCV32.json
+/Definitions/RISCV64.json
+/Definitions/RISCV128.json

CMakeLists.txt

@@ -90,6 +90,9 @@ elseif(CMAKE_CXX_COMPILER_ARCHITECTURE_ID MATCHES "X86" OR
 elseif(CMAKE_CXX_COMPILER_ARCHITECTURE_ID MATCHES "X64" OR
       CMAKE_SYSTEM_PROCESSOR MATCHES "AMD64|x86_64")
   set(DS2_ARCHITECTURE X86_64)
+elseif(CMAKE_CXX_COMPILER_ARCHITECTURE_ID MATCHES "RISCV32|RISCV64|RISCV128" OR
+       CMAKE_SYSTEM_PROCESSOR MATCHES "riscv32|riscv64|riscv128")
+  set(DS2_ARCHITECTURE RISCV)
 else()
   message(SEND_ERROR "Unknown host architecture: ${CMAKE_SYSTEM_PROCESSOR}")
 endif()
@@ -123,7 +126,14 @@ set_target_properties(RegsGen2::RegsGen2 PROPERTIES
   IMPORTED_LOCATION ${BINARY_DIR}/${RegsGen2_RELATIVE_PATH})
 add_dependencies(RegsGen2::RegsGen2 RegsGen2)
 
-foreach(ARCH ARM ARM64 X86 X86_64)
+# Generate different pointer size RISC-V definitions.
+# FIXME(compnerd) this assumes all targets are RISCVnnnG, which may not be true.
+foreach(WORDSIZE 32 64 128)
+  configure_file(${PROJECT_SOURCE_DIR}/Definitions/RISCVnnn.json
+    ${PROJECT_SOURCE_DIR}/Definitions/RISCV${WORDSIZE}.json @ONLY)
+endforeach()
+
+foreach(ARCH ARM ARM64 RISCV32 RISCV64 RISCV128 X86 X86_64)
   add_custom_command(OUTPUT
       ${CMAKE_CURRENT_BINARY_DIR}/Headers/DebugServer2/Architecture/${ARCH}/RegistersDescriptors.h
     COMMAND
@@ -222,6 +232,28 @@ elseif(DS2_ARCHITECTURE MATCHES "X86|X86_64")
       PROPERTIES
         COMPILE_OPTIONS $<$<NOT:$<CXX_COMPILER_ID:MSVC>>:-Wno-unused-const-variable>)
   endif()
+elseif(DS2_ARCHITECTURE STREQUAL RISCV)
+  target_sources(ds2 PRIVATE
+    Sources/Architecture/RISCV/SoftwareSingleStep.cpp
+    Sources/Core/RISCV/HardwareBreakpointManager.cpp
+    Sources/Core/RISCV/SoftwareBreakpointManager.cpp)
+
+  if(CMAKE_CXX_COMPILER_ARCHITECTURE_ID MATCHES "RISCV32" OR
+       CMAKE_SYSTEM_PROCESSOR MATCHES "riscv32")
+    target_sources(ds2 PRIVATE
+      ${CMAKE_CURRENT_BINARY_DIR}/Headers/DebugServer2/Architecture/RISCV32/RegistersDescriptors.h
+      ${CMAKE_CURRENT_BINARY_DIR}/Sources/Architecture/RISCV32/RegistersDescriptors.cpp)
+  elseif(CMAKE_CXX_COMPILER_ARCHITECTURE_ID MATCHES "RISCV64" OR
+       CMAKE_SYSTEM_PROCESSOR MATCHES "riscv64")
+    target_sources(ds2 PRIVATE
+      ${CMAKE_CURRENT_BINARY_DIR}/Headers/DebugServer2/Architecture/RISCV64/RegistersDescriptors.h
+      ${CMAKE_CURRENT_BINARY_DIR}/Sources/Architecture/RISCV64/RegistersDescriptors.cpp)
+  elseif(CMAKE_CXX_COMPILER_ARCHITECTURE_ID MATCHES "RISCV128" OR
+       CMAKE_SYSTEM_PROCESSOR MATCHES "riscv128")
+    target_sources(ds2 PRIVATE
+      ${CMAKE_CURRENT_BINARY_DIR}/Headers/DebugServer2/Architecture/RISCV128/RegistersDescriptors.h
+      ${CMAKE_CURRENT_BINARY_DIR}/Sources/Architecture/RISCV128/RegistersDescriptors.cpp)
+  endif()
 endif()
 
 # OS Sources