Better detection of extended-remote types

pwndbg/remote.py

@@ -17,5 +17,17 @@ def is_remote():
     # https://sourceware.org/bugzilla/show_bug.cgi?id=18335
     #
     # return 'serial line' in gdb.execute('info program',to_string=True,)
+    info_file = gdb.execute('info file',to_string=True,from_tty=False)
 
-    return 'Remote serial target' in gdb.execute('info file',to_string=True,from_tty=False)
+    # target remote
+    if 'Remote serial target' in info_file:
+        return True
+
+    # target extended-remote
+    if 'Extended remote serial target' in info_file:
+        return True
+
+    if 'Debugging a target over a serial line.' in info_file:
+        return True
+
+    return False