gdb rsp: make start() rerunnable

Signed-off-by: Amneesh Singh <natto@weirdnatto.in>

src/gdb_rsp.cc

@@ -38,12 +38,13 @@ be_to_le(std::string str) {
     return current;
 }
 
-GdbRsp::GdbRsp(std::shared_ptr<Cpu> cpu)
-  : cpu(cpu) {}
+GdbRsp::GdbRsp(std::shared_ptr<Cpu> cpu, uint port)
+  : cpu(cpu) {
+    server.start(port);
+}
 
 void
-GdbRsp::start(const uint port) {
-    server.start(port);
+GdbRsp::start() {
     server.run();
 
     attach();

src/gdb_rsp.hh

@@ -4,9 +4,9 @@
 namespace matar {
 class GdbRsp {
   public:
-    GdbRsp(std::shared_ptr<Cpu> cpu);
+    GdbRsp(std::shared_ptr<Cpu> cpu, uint port);
     ~GdbRsp() = default;
-    void start(const uint port);
+    void start();
     void attach();
     void satisfy_client();
     void step();