diff --git a/lldb/include/lldb/Target/Process.h b/lldb/include/lldb/Target/Process.h
--- a/lldb/include/lldb/Target/Process.h
+++ b/lldb/include/lldb/Target/Process.h
@@ -699,6 +699,9 @@
   /// Get the system architecture for this process.
   virtual ArchSpec GetSystemArchitecture() { return {}; }
 
+  /// Return the number of bits in a vmaddr that are used by valid addresses.
+  virtual llvm::Optional<uint32_t> GetAddressingBits() { return {}; }
+
   /// Get the system runtime plug-in for this process.
   ///
   /// \return
diff --git a/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.h b/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.h
--- a/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.h
+++ b/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.h
@@ -72,6 +72,8 @@
 
   ArchSpec GetSystemArchitecture() override;
 
+  llvm::Optional<uint32_t> GetAddressingBits() override;
+
   // Check if a given Process
   bool CanDebug(lldb::TargetSP target_sp,
                 bool plugin_specified_by_name) override;
diff --git a/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp b/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
--- a/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
+++ b/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
@@ -212,6 +212,10 @@
   return m_gdb_comm.GetHostArchitecture();
 }
 
+llvm::Optional<uint32_t> ProcessGDBRemote::GetAddressingBits() {
+  return m_gdb_comm.GetAddressingBits();
+}
+
 bool ProcessGDBRemote::CanDebug(lldb::TargetSP target_sp,
                                 bool plugin_specified_by_name) {
   if (plugin_specified_by_name)