2010-03-22 Doug Kwan <dougkwan@google.com>
[binutils-gdb.git] / gold / options.h
index de1f07a43fff009b7b7beee6b2a5b89eb18ae126..3a234d0ba5d1d38f3e48b34410b5dce0ac41f35b 100644 (file)
@@ -53,6 +53,7 @@ class Command_line;
 class General_options;
 class Search_directory;
 class Input_file_group;
+class Input_file_lib;
 class Position_dependent_options;
 class Target;
 class Plugin_manager;
@@ -244,12 +245,18 @@ struct Struct_special : public Struct_var
 // var() and set_var() as General_options methods.  Arguments as are
 // for the constructor for One_option.  param_type__ is the same as
 // type__ for built-in types, and "const type__ &" otherwise.
+//
+// When we define the linker command option "assert", the macro argument
+// varname__ of DEFINE_var below will be replaced by "assert".  On Mac OSX
+// assert.h is included implicitly by one of the library headers we use.  To
+// avoid unintended macro substitution of "assert()", we need to enclose
+// varname__ with parenthese.
 #define DEFINE_var(varname__, dashes__, shortname__, default_value__,        \
                    default_value_as_string__, helpstring__, helparg__,       \
                    optional_arg__, type__, param_type__, parse_fn__)        \
  public:                                                                     \
   param_type__                                                               \
-  varname__() const                                                          \
+  (varname__)() const                                                        \
   { return this->varname__##_.value; }                                       \
                                                                              \
   bool                                                                       \
@@ -309,7 +316,10 @@ struct Struct_special : public Struct_var
     void                                                                 \
     parse_to_value(const char*, const char*,                             \
                    Command_line*, General_options* options)              \
-    { options->set_##varname__(false); }                                 \
+    {                                                                    \
+      options->set_##varname__(false);                                   \
+      options->set_user_set_##varname__();                               \
+    }                                                                    \
                                                                          \
     options::One_option option;                                          \
   };                                                                     \
@@ -713,6 +723,19 @@ class General_options
   DEFINE_string(fini, options::ONE_DASH, '\0', "_fini",
                 N_("Call SYMBOL at unload-time"), N_("SYMBOL"));
 
+  DEFINE_bool(fix_cortex_a8, options::TWO_DASHES, '\0', false,
+             N_("(ARM only) Fix binaries for Cortex-A8 erratum."),
+             N_("(ARM only) Do not fix binaries for Cortex-A8 erratum."));
+
+  DEFINE_special(fix_v4bx, options::TWO_DASHES, '\0',
+                 N_("(ARM only) Rewrite BX rn as MOV pc, rn for ARMv4"),
+                 NULL);
+
+  DEFINE_special(fix_v4bx_interworking, options::TWO_DASHES, '\0',
+                 N_("(ARM only) Rewrite BX rn branch to ARMv4 interworking "
+                    "veneer"),
+                 NULL);
+
   DEFINE_bool(g, options::EXACTLY_ONE_DASH, '\0', false,
              N_("Ignored"), NULL);
 
@@ -752,11 +775,14 @@ class General_options
   DEFINE_special(just_symbols, options::TWO_DASHES, '\0',
                  N_("Read only symbol values from FILE"), N_("FILE"));
 
-  DEFINE_bool(keep_files_mapped, options::TWO_DASHES, '\0',
+  DEFINE_bool(map_whole_files, options::TWO_DASHES, '\0',
              sizeof(void*) >= 8,
               N_("Map whole files to memory (default on 64-bit hosts)"),
               N_("Map relevant file parts to memory (default on 32-bit "
                  "hosts)"));
+  DEFINE_bool(keep_files_mapped, options::TWO_DASHES, '\0', true,
+              N_("Keep files mapped across passes (default)"),
+              N_("Release mapped files after each pass"));
 
   DEFINE_special(library, options::TWO_DASHES, 'l',
                  N_("Search for library LIBNAME"), N_("LIBNAME"));
@@ -853,6 +879,10 @@ class General_options
                         N_("Sort common symbols by alignment"),
                         N_("[={ascending,descending}]"));
 
+  DEFINE_uint(spare_dynamic_tags, options::TWO_DASHES, '\0', 5,
+             N_("Dynamic tag slots to reserve (default 5)"),
+             N_("COUNT"));
+
   DEFINE_bool(strip_all, options::TWO_DASHES, 's', false,
               N_("Strip all symbols"), NULL);
   DEFINE_bool(strip_debug, options::TWO_DASHES, 'S', false,
@@ -892,7 +922,8 @@ class General_options
 
   DEFINE_enum(icf, options::TWO_DASHES, '\0', "none",
               N_("Identical Code Folding. "
-                 "\'--icf=safe\' folds only ctors and dtors."),
+                 "\'--icf=safe\' Folds ctors, dtors and functions whose"
+                 " pointers are definitely not taken."),
              ("[none,all,safe]"),      
               {"none", "all", "safe"});
 
@@ -972,6 +1003,14 @@ class General_options
              N_("Warn if text segment is not shareable"),
              N_("Do not warn if text segment is not shareable (default)"));
 
+  DEFINE_bool(warn_unresolved_symbols, options::TWO_DASHES, '\0', false,
+             N_("Report unresolved symbols as warnings"),
+             NULL);
+  DEFINE_bool_alias(error_unresolved_symbols, warn_unresolved_symbols,
+                   options::TWO_DASHES, '\0',
+                   N_("Report unresolved symbols as errors"),
+                   NULL, true);
+
   DEFINE_bool(whole_archive, options::TWO_DASHES, '\0', false,
               N_("Include all archive contents"),
               N_("Include only needed archive contents"));
@@ -995,6 +1034,12 @@ class General_options
   DEFINE_special(end_group, options::TWO_DASHES, ')',
                  N_("End a library search group"), NULL);
 
+
+  DEFINE_special(start_lib, options::TWO_DASHES, '\0',
+                 N_("Start a library"), NULL);
+  DEFINE_special(end_lib, options::TWO_DASHES, '\0',
+                 N_("End a library "), NULL);
+
   // The -z options.
 
   DEFINE_bool(combreloc, options::DASH_Z, '\0', true,
@@ -1197,6 +1242,20 @@ class General_options
   bool
   section_start(const char* secname, uint64_t* paddr) const;
 
+  enum Fix_v4bx
+  {
+    // Leave original instruction.
+    FIX_V4BX_NONE,
+    // Replace instruction.
+    FIX_V4BX_REPLACE,
+    // Generate an interworking veneer.
+    FIX_V4BX_INTERWORKING
+  };
+
+  Fix_v4bx
+  fix_v4bx() const
+  { return (this->fix_v4bx_); }
+
  private:
   // Don't copy this structure.
   General_options(const General_options&);
@@ -1286,6 +1345,8 @@ class General_options
   Unordered_set<std::string> symbols_to_retain_;
   // Map from section name to address from --section-start.
   std::map<std::string, uint64_t> section_starts_;
+  // Whether to process armv4 bx instruction relocation.
+  Fix_v4bx fix_v4bx_;
 };
 
 // The position-dependent options.  We use this to store the state of
@@ -1446,12 +1507,17 @@ class Input_argument
  public:
   // Create a file or library argument.
   explicit Input_argument(Input_file_argument file)
-    : is_file_(true), file_(file), group_(NULL)
+    : is_file_(true), file_(file), group_(NULL), lib_(NULL)
   { }
 
   // Create a group argument.
   explicit Input_argument(Input_file_group* group)
-    : is_file_(false), group_(group)
+    : is_file_(false), group_(group), lib_(NULL)
+  { }
+
+  // Create a lib argument.
+  explicit Input_argument(Input_file_lib* lib)
+    : is_file_(false), group_(NULL), lib_(lib)
   { }
 
   // Return whether this is a file.
@@ -1462,7 +1528,12 @@ class Input_argument
   // Return whether this is a group.
   bool
   is_group() const
-  { return !this->is_file_; }
+  { return !this->is_file_ && this->lib_ == NULL; }
+
+  // Return whether this is a lib.
+  bool
+  is_lib() const
+  { return this->lib_ != NULL; }
 
   // Return the information about the file.
   const Input_file_argument&
@@ -1487,10 +1558,28 @@ class Input_argument
     return this->group_;
   }
 
+  // Return the information about the lib.
+  const Input_file_lib*
+  lib() const
+  {
+    gold_assert(!this->is_file_);
+    gold_assert(this->lib_);
+    return this->lib_;
+  }
+
+  Input_file_lib*
+  lib()
+  {
+    gold_assert(!this->is_file_);
+    gold_assert(this->lib_);
+    return this->lib_;
+  }
+
  private:
   bool is_file_;
   Input_file_argument file_;
   Input_file_group* group_;
+  Input_file_lib* lib_;
 };
 
 typedef std::vector<Input_argument> Input_argument_list;
@@ -1526,6 +1615,46 @@ class Input_file_group
   Input_argument_list files_;
 };
 
+// A lib from the command line.  This is a set of arguments within
+// --start-lib ... --end-lib.
+
+class Input_file_lib
+{
+ public:
+  typedef Input_argument_list::const_iterator const_iterator;
+
+  Input_file_lib(const Position_dependent_options& options)
+    : files_(), options_(options)
+  { }
+
+  // Add a file to the end of the lib.
+  void
+  add_file(const Input_file_argument& arg)
+  { this->files_.push_back(Input_argument(arg)); }
+
+  const Position_dependent_options&
+  options() const
+  { return this->options_; }
+
+  // Iterators to iterate over the lib contents.
+
+  const_iterator
+  begin() const
+  { return this->files_.begin(); }
+
+  const_iterator
+  end() const
+  { return this->files_.end(); }
+
+  size_t
+  size() const
+  { return this->files_.size(); }
+
+ private:
+  Input_argument_list files_;
+  Position_dependent_options options_;
+};
+
 // A list of files from the command line or a script.
 
 class Input_arguments
@@ -1534,7 +1663,7 @@ class Input_arguments
   typedef Input_argument_list::const_iterator const_iterator;
 
   Input_arguments()
-    : input_argument_list_(), in_group_(false)
+    : input_argument_list_(), in_group_(false), in_lib_(false)
   { }
 
   // Add a file.
@@ -1549,11 +1678,24 @@ class Input_arguments
   void
   end_group();
 
+  // Start a lib (the --start-lib option).
+  void
+  start_lib(const Position_dependent_options&);
+
+  // End a lib (the --end-lib option).
+  void
+  end_lib();
+
   // Return whether we are currently in a group.
   bool
   in_group() const
   { return this->in_group_; }
 
+  // Return whether we are currently in a lib.
+  bool
+  in_lib() const
+  { return this->in_lib_; }
+
   // The number of entries in the list.
   int
   size() const
@@ -1577,6 +1719,7 @@ class Input_arguments
  private:
   Input_argument_list input_argument_list_;
   bool in_group_;
+  bool in_lib_;
 };