Impl emulator stepping with GDB

1 files changed, 20 insertions, 3 deletions

diff --git a/gdbremote_parser.hpp b/gdbremote_parser.hpp
index 2e9fd88..88a0cf7 100644
--- a/gdbremote_parser.hpp
+++ b/gdbremote_parser.hpp
@@ -57,14 +57,18 @@ enum class PacketType: int {
     kEnableExtendedMode,
     kInterrupt,
     kContinue,
+    kContinueAskSupported,
     kReadGeneralRegisters,
+    kReadMemory,
+    kStep,
 };
 
 struct PacketData {
-    PacketData() = delete;
+    virtual ~PacketData() {};
+protected:
     PacketData(const PacketData&) = delete;
     PacketData(PacketData&&) = delete;
-    virtual ~PacketData() {}
+    PacketData() = default;
 };
 
 struct PacketDataSupportedFeatures: public PacketData {
@@ -72,9 +76,16 @@ struct PacketDataSupportedFeatures: public PacketData {
     virtual ~PacketDataSupportedFeatures() {}
 };
 
+struct PacketDataReadMemory: public PacketData {
+    PacketDataReadMemory(uint32_t a_offset, uint32_t a_length)
+        : offset(a_offset), length(a_length) {}
+    uint32_t offset{}, length{};
+    virtual ~PacketDataReadMemory() {}
+};
+
 struct Packet {
     const PacketType type{};
-    const std::unique_ptr<PacketData> data{nullptr};
+    const std::unique_ptr<const PacketData> data{nullptr};
 
     /** Convert raw packet data into a Packet
      *
@@ -118,8 +129,14 @@ struct Packet {
             return "vCtrlC";
         case PacketType::kContinue:
             return "vCont";
+        case PacketType::kContinueAskSupported:
+            return "vCont?";
         case PacketType::kReadGeneralRegisters:
             return "g";
+        case PacketType::kReadMemory:
+            return "m";
+        case PacketType::kStep:
+            return "s";
         }
         return "<unknown>";
     }