From 15d14d36fc7ac30cdbde8c2a78e901ba2c47e94d Mon Sep 17 00:00:00 2001
From: Oxore <oxore@protonmail.com>
Date: Sun, 2 Oct 2022 00:49:39 +0300
Subject: Impl setting registers via GDB

---
 emulator.cpp | 42 +++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 41 insertions(+), 1 deletion(-)

(limited to 'emulator.cpp')

diff --git a/emulator.cpp b/emulator.cpp
index 7e6ad25..b5ad031 100644
--- a/emulator.cpp
+++ b/emulator.cpp
@@ -211,7 +211,7 @@ static std::string CreateResponse(
         {
             const M68KCPUState state = m68k_debug.GetCPUState();
             std::string result{};
-            for (size_t i = 0; i < state.registers_count ;i++)
+            for (size_t i = 0; i < state.registers_count; i++)
             {
                 constexpr size_t value_size = std::string_view("12345678").length();
                 char value[value_size + 1]{};
@@ -221,6 +221,46 @@ static std::string CreateResponse(
             }
             return result;
         }
+    case PacketType::kWriteGeneralRegisters:
+        {
+            const auto * const data =
+                static_cast<const PacketDataWriteGeneralRegisters*>(packet.data.get());
+            const auto& registers = data->registers;
+            for (size_t i = 0; i < registers.size(); i++) {
+                m68k_debug.SetRegister(static_cast<M68KRegister>(i), registers[i]);
+            }
+            return "OK";
+        }
+        break;
+    case PacketType::kReadRegister:
+        {
+            const auto * const data =
+                static_cast<const PacketDataReadRegister*>(packet.data.get());
+            const auto reg_id = static_cast<M68KRegister>(data->reg_id);
+            if (reg_id >= M68KRegister::kRegistersCount) {
+                return "E00";
+            }
+            const uint32_t value = m68k_debug.GetRegister(reg_id);
+            constexpr size_t value_size = std::string_view("12345678").length();
+            char value_str[value_size + 1]{};
+            const int ret = snprintf(value_str, value_size + 1, "%08x", value);
+            assert(ret == value_size);
+            return std::string(value_str, value_size);
+        }
+        break;
+    case PacketType::kWriteRegister:
+        {
+            const auto * const data =
+                static_cast<const PacketDataWriteRegister*>(packet.data.get());
+            const auto reg_id = static_cast<M68KRegister>(data->reg_id);
+            const auto value = data->value;
+            if (reg_id >= M68KRegister::kRegistersCount) {
+                return "E00";
+            }
+            m68k_debug.SetRegister(reg_id, value);
+            return "OK";
+        }
+        break;
     case PacketType::kReadMemory:
         {
             const auto * const data =
-- 
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