base: Refactor the GDB code.

The new version modularizes the implementation of the various commands,
gets rid of dynamic allocation of the register cache, fixes some small
style problems, and uses exceptions to simplify error handling internal to
the GDB stub.

Change-Id: Iff3548373ce4adfb99106a810f5713b769df89b2
Reviewed-on: https://gem5-review.googlesource.com/3280
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Boris Shingarov <shingarov@gmail.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>

2 files changed, 8 insertions, 3 deletions

diff --git a/src/arch/mips/remote_gdb.cc b/src/arch/mips/remote_gdb.cc
index 4fa7cac70..2cc2d779b 100644
--- a/src/arch/mips/remote_gdb.cc
+++ b/src/arch/mips/remote_gdb.cc
@@ -152,7 +152,7 @@ using namespace std;
 using namespace MipsISA;
 
 RemoteGDB::RemoteGDB(System *_system, ThreadContext *tc)
-    : BaseRemoteGDB(_system, tc)
+    : BaseRemoteGDB(_system, tc), regCache(this)
 {
 }
 
@@ -207,5 +207,5 @@ RemoteGDB::MipsGdbRegCache::setRegs(ThreadContext *context) const
 
 RemoteGDB::BaseGdbRegCache*
 RemoteGDB::gdbRegs() {
-    return new MipsGdbRegCache(this);
+    return &regCache;
 }
diff --git a/src/arch/mips/remote_gdb.hh b/src/arch/mips/remote_gdb.hh
index fd006e0b6..fba55d84c 100644
--- a/src/arch/mips/remote_gdb.hh
+++ b/src/arch/mips/remote_gdb.hh
@@ -70,9 +70,14 @@ class RemoteGDB : public BaseRemoteGDB
         size_t size() const { return sizeof(r); }
         void getRegs(ThreadContext*);
         void setRegs(ThreadContext*) const;
-        const std::string name() const { return gdb->name() + ".MipsGdbRegCache"; }
+        const std::string
+        name() const
+        {
+            return gdb->name() + ".MipsGdbRegCache";
+        }
     };
 
+    MipsGdbRegCache regCache;
 
   public:
     RemoteGDB(System *_system, ThreadContext *tc);