gold/gold.h

   1 // gold.h -- general definitions for gold   -*- C++ -*-
   2
   3 // Copyright 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
   4 // Written by Ian Lance Taylor <iant@google.com>.
   5
   6 // This file is part of gold.
   7
   8 // This program is free software; you can redistribute it and/or modify
   9 // it under the terms of the GNU General Public License as published by
  10 // the Free Software Foundation; either version 3 of the License, or
  11 // (at your option) any later version.
  12
  13 // This program is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17
  18 // You should have received a copy of the GNU General Public License
  19 // along with this program; if not, write to the Free Software
  20 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  21 // MA 02110-1301, USA.
  22
  23 #ifndef GOLD_GOLD_H
  24 #define GOLD_GOLD_H
  25
  26 #include "config.h"
  27 #include "ansidecl.h"
  28
  29 #include <cstddef>
  30 #include <cstring>
  31 #include <stdint.h>
  32 #include <sys/types.h>
  33
  34 #ifndef ENABLE_NLS
  35   // The Solaris version of locale.h always includes libintl.h.  If we
  36   // have been configured with --disable-nls then ENABLE_NLS will not
  37   // be defined and the dummy definitions of bindtextdomain (et al)
  38   // below will conflict with the defintions in libintl.h.  So we
  39   // define these values to prevent the bogus inclusion of libintl.h.
  40 # define _LIBINTL_H
  41 # define _LIBGETTEXT_H
  42 #endif
  43
  44 // Always include <clocale> first to avoid conflicts with the macros
  45 // used when ENABLE_NLS is not defined.
  46 #include <clocale>
  47
  48 #ifdef ENABLE_NLS
  49 # include <libintl.h>
  50 # define _(String) gettext (String)
  51 # ifdef gettext_noop
  52 #  define N_(String) gettext_noop (String)
  53 # else
  54 #  define N_(String) (String)
  55 # endif
  56 #else
  57 # define gettext(Msgid) (Msgid)
  58 # define dgettext(Domainname, Msgid) (Msgid)
  59 # define dcgettext(Domainname, Msgid, Category) (Msgid)
  60 # define textdomain(Domainname) while (0) /* nothing */
  61 # define bindtextdomain(Domainname, Dirname) while (0) /* nothing */
  62 # define _(String) (String)
  63 # define N_(String) (String)
  64 #endif
  65
  66 // Figure out how to get a hash set and a hash map.
  67
  68 #if defined(HAVE_TR1_UNORDERED_SET) && defined(HAVE_TR1_UNORDERED_MAP)
  69
  70 #include <tr1/unordered_set>
  71 #include <tr1/unordered_map>
  72
  73 // We need a template typedef here.
  74
  75 #define Unordered_set std::tr1::unordered_set
  76 #define Unordered_map std::tr1::unordered_map
  77
  78 #elif defined(HAVE_EXT_HASH_MAP) && defined(HAVE_EXT_HASH_SET)
  79
  80 #include <ext/hash_map>
  81 #include <ext/hash_set>
  82 #include <string>
  83
  84 #define Unordered_set __gnu_cxx::hash_set
  85 #define Unordered_map __gnu_cxx::hash_map
  86
  87 namespace __gnu_cxx
  88 {
  89
  90 template<>
  91 struct hash<std::string>
  92 {
  93   size_t
  94   operator()(std::string s) const
  95   { return __stl_hash_string(s.c_str()); }
  96 };
  97
  98 template<typename T>
  99 struct hash<T*>
 100 {
 101   size_t
 102   operator()(T* p) const
 103   { return reinterpret_cast<size_t>(p); }
 104 };
 105
 106 }
 107
 108 #else
 109
 110 // The fallback is to just use set and map.
 111
 112 #include <set>
 113 #include <map>
 114
 115 #define Unordered_set std::set
 116 #define Unordered_map std::map
 117
 118 #endif
 119
 120 #ifndef HAVE_PREAD
 121 extern "C" ssize_t pread(int, void*, size_t, off_t);
 122 #endif
 123
 124 #ifndef HAVE_FTRUNCATE
 125 extern "C" int ftruncate(int, off_t);
 126 #endif
 127
 128 namespace gold
 129 {
 130
 131 // General declarations.
 132
 133 class General_options;
 134 class Command_line;
 135 class Input_argument_list;
 136 class Dirsearch;
 137 class Input_objects;
 138 class Mapfile;
 139 class Symbol;
 140 class Symbol_table;
 141 class Layout;
 142 class Task;
 143 class Workqueue;
 144 class Output_file;
 145 template<int size, bool big_endian>
 146 struct Relocate_info;
 147
 148 // Some basic types.  For these we use lower case initial letters.
 149
 150 // For an offset in an input or output file, use off_t.  Note that
 151 // this will often be a 64-bit type even for a 32-bit build.
 152
 153 // The size of a section if we are going to look at the contents.
 154 typedef size_t section_size_type;
 155
 156 // An offset within a section when we are looking at the contents.
 157 typedef ptrdiff_t section_offset_type;
 158
 159 // The name of the program as used in error messages.
 160 extern const char* program_name;
 161
 162 // This function is called to exit the program.  Status is true to
 163 // exit success (0) and false to exit failure (1).
 164 extern void
 165 gold_exit(bool status) ATTRIBUTE_NORETURN;
 166
 167 // This function is called to emit an error message and then
 168 // immediately exit with failure.
 169 extern void
 170 gold_fatal(const char* format, ...) ATTRIBUTE_NORETURN ATTRIBUTE_PRINTF_1;
 171
 172 // This function is called to issue an error.  This will cause gold to
 173 // eventually exit with failure.
 174 extern void
 175 gold_error(const char* msg, ...) ATTRIBUTE_PRINTF_1;
 176
 177 // This function is called to issue a warning.
 178 extern void
 179 gold_warning(const char* msg, ...) ATTRIBUTE_PRINTF_1;
 180
 181 // This function is called to print an informational message.
 182 extern void
 183 gold_info(const char* msg, ...) ATTRIBUTE_PRINTF_1;
 184
 185 // Work around a bug in gcc 4.3.0.  http://gcc.gnu.org/PR35546 .  This
 186 // can probably be removed after the bug has been fixed for a while.
 187 #ifdef HAVE_TEMPLATE_ATTRIBUTES
 188 #define TEMPLATE_ATTRIBUTE_PRINTF_4 ATTRIBUTE_PRINTF_4
 189 #else
 190 #define TEMPLATE_ATTRIBUTE_PRINTF_4
 191 #endif
 192
 193 // This function is called to issue an error at the location of a
 194 // reloc.
 195 template<int size, bool big_endian>
 196 extern void
 197 gold_error_at_location(const Relocate_info<size, big_endian>*,
 198                        size_t, off_t, const char* format, ...)
 199   TEMPLATE_ATTRIBUTE_PRINTF_4;
 200
 201 // This function is called to issue a warning at the location of a
 202 // reloc.
 203 template<int size, bool big_endian>
 204 extern void
 205 gold_warning_at_location(const Relocate_info<size, big_endian>*,
 206                          size_t, off_t, const char* format, ...)
 207   TEMPLATE_ATTRIBUTE_PRINTF_4;
 208
 209 // This function is called to report an undefined symbol without
 210 // a relocation (e.g., referenced by a dynamic object).  SYM is
 211 // the undefined symbol.  The file name associated with the SYM
 212 // is used to print a location for the undefined symbol.
 213 extern void
 214 gold_undefined_symbol(const Symbol*);
 215
 216 // This function is called to report an undefined symbol resulting
 217 // from a relocation.  SYM is the undefined symbol.  RELINFO is the
 218 // general relocation info.  RELNUM is the number of the reloc,
 219 // and RELOFFSET is the reloc's offset.
 220 template<int size, bool big_endian>
 221 extern void
 222 gold_undefined_symbol_at_location(const Symbol*,
 223                                   const Relocate_info<size, big_endian>*,
 224                                   size_t, off_t);
 225
 226 // This is function is called in some cases if we run out of memory.
 227 extern void
 228 gold_nomem() ATTRIBUTE_NORETURN;
 229
 230 // This macro and function are used in cases which can not arise if
 231 // the code is written correctly.
 232
 233 #define gold_unreachable() \
 234   (gold::do_gold_unreachable(__FILE__, __LINE__, __FUNCTION__))
 235
 236 extern void do_gold_unreachable(const char*, int, const char*)
 237   ATTRIBUTE_NORETURN;
 238
 239 // Assertion check.
 240
 241 #define gold_assert(expr) ((void)(!(expr) ? gold_unreachable(), 0 : 0))
 242
 243 // Print version information.
 244 extern void
 245 print_version(bool print_short);
 246
 247 // Get the version string.
 248 extern const char*
 249 get_version_string();
 250
 251 // Convert numeric types without unnoticed loss of precision.
 252 template<typename To, typename From>
 253 inline To
 254 convert_types(const From from)
 255 {
 256   To to = from;
 257   gold_assert(static_cast<From>(to) == from);
 258   return to;
 259 }
 260
 261 // A common case of convert_types<>: convert to section_size_type.
 262 template<typename From>
 263 inline section_size_type
 264 convert_to_section_size_type(const From from)
 265 { return convert_types<section_size_type, From>(from); }
 266
 267 // Queue up the first set of tasks.
 268 extern void
 269 queue_initial_tasks(const General_options&,
 270                     Dirsearch&,
 271                     const Command_line&,
 272                     Workqueue*,
 273                     Input_objects*,
 274                     Symbol_table*,
 275                     Layout*,
 276                     Mapfile*);
 277
 278 // Queue up the set of tasks to be done before
 279 // the middle set of tasks.  Only used when garbage
 280 // collection is to be done.
 281 extern void
 282 queue_middle_gc_tasks(const General_options&,
 283                       const Task*,
 284                       const Input_objects*,
 285                       Symbol_table*,
 286                       Layout*,
 287                       Workqueue*,
 288                       Mapfile*);
 289
 290 // Queue up the middle set of tasks.
 291 extern void
 292 queue_middle_tasks(const General_options&,
 293                    const Task*,
 294                    const Input_objects*,
 295                    Symbol_table*,
 296                    Layout*,
 297                    Workqueue*,
 298                    Mapfile*);
 299
 300 // Queue up the final set of tasks.
 301 extern void
 302 queue_final_tasks(const General_options&,
 303                   const Input_objects*,
 304                   const Symbol_table*,
 305                   Layout*,
 306                   Workqueue*,
 307                   Output_file* of);
 308
 309 inline bool
 310 is_prefix_of(const char* prefix, const char* str)
 311 {
 312   return strncmp(prefix, str, strlen(prefix)) == 0;
 313 }
 314
 315 } // End namespace gold.
 316
 317 #endif // !defined(GOLD_GOLD_H)