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     && defined(HAVE_TR1_UNORDERED_MAP_REHASH)
  70
  71 #include <tr1/unordered_set>
  72 #include <tr1/unordered_map>
  73
  74 // We need a template typedef here.
  75
  76 #define Unordered_set std::tr1::unordered_set
  77 #define Unordered_map std::tr1::unordered_map
  78
  79 #define reserve_unordered_map(map, n) ((map)->rehash(n))
  80
  81 #elif defined(HAVE_EXT_HASH_MAP) && defined(HAVE_EXT_HASH_SET)
  82
  83 #include <ext/hash_map>
  84 #include <ext/hash_set>
  85 #include <string>
  86
  87 #define Unordered_set __gnu_cxx::hash_set
  88 #define Unordered_map __gnu_cxx::hash_map
  89
  90 namespace __gnu_cxx
  91 {
  92
  93 template<>
  94 struct hash<std::string>
  95 {
  96   size_t
  97   operator()(std::string s) const
  98   { return __stl_hash_string(s.c_str()); }
  99 };
 100
 101 template<typename T>
 102 struct hash<T*>
 103 {
 104   size_t
 105   operator()(T* p) const
 106   { return reinterpret_cast<size_t>(p); }
 107 };
 108
 109 }
 110
 111 #define reserve_unordered_map(map, n) ((map)->resize(n))
 112
 113 #else
 114
 115 // The fallback is to just use set and map.
 116
 117 #include <set>
 118 #include <map>
 119
 120 #define Unordered_set std::set
 121 #define Unordered_map std::map
 122
 123 #define reserve_unordered_map(map, n)
 124
 125 #endif
 126
 127 #ifndef HAVE_PREAD
 128 extern "C" ssize_t pread(int, void*, size_t, off_t);
 129 #endif
 130
 131 #ifndef HAVE_FTRUNCATE
 132 extern "C" int ftruncate(int, off_t);
 133 #endif
 134
 135 #ifndef HAVE_MREMAP
 136 #define MREMAP_MAYMOVE 1
 137 extern "C" void *mremap(void *, size_t, size_t, int, ...);
 138 #endif
 139
 140 #ifndef HAVE_FFSLL
 141 extern "C" int ffsll(long long);
 142 #endif
 143
 144 #if !HAVE_DECL_MEMMEM
 145 extern "C" void *memmem(const void *, size_t, const void *, size_t);
 146 #endif
 147
 148 #if !HAVE_DECL_STRNDUP
 149 extern "C" char *strndup(const char *, size_t);
 150 #endif
 151
 152 namespace gold
 153 {
 154
 155 // General declarations.
 156
 157 class General_options;
 158 class Command_line;
 159 class Dirsearch;
 160 class Input_objects;
 161 class Mapfile;
 162 class Symbol;
 163 class Symbol_table;
 164 class Layout;
 165 class Task;
 166 class Workqueue;
 167 class Output_file;
 168 template<int size, bool big_endian>
 169 struct Relocate_info;
 170
 171 // Some basic types.  For these we use lower case initial letters.
 172
 173 // For an offset in an input or output file, use off_t.  Note that
 174 // this will often be a 64-bit type even for a 32-bit build.
 175
 176 // The size of a section if we are going to look at the contents.
 177 typedef size_t section_size_type;
 178
 179 // An offset within a section when we are looking at the contents.
 180 typedef ptrdiff_t section_offset_type;
 181
 182 // The name of the program as used in error messages.
 183 extern const char* program_name;
 184
 185 // This function is called to exit the program.  Status is true to
 186 // exit success (0) and false to exit failure (1).
 187 extern void
 188 gold_exit(bool status) ATTRIBUTE_NORETURN;
 189
 190 // This function is called to emit an error message and then
 191 // immediately exit with failure.
 192 extern void
 193 gold_fatal(const char* format, ...) ATTRIBUTE_NORETURN ATTRIBUTE_PRINTF_1;
 194
 195 // This function is called to issue an error.  This will cause gold to
 196 // eventually exit with failure.
 197 extern void
 198 gold_error(const char* msg, ...) ATTRIBUTE_PRINTF_1;
 199
 200 // This function is called to issue a warning.
 201 extern void
 202 gold_warning(const char* msg, ...) ATTRIBUTE_PRINTF_1;
 203
 204 // This function is called to print an informational message.
 205 extern void
 206 gold_info(const char* msg, ...) ATTRIBUTE_PRINTF_1;
 207
 208 // Work around a bug in gcc 4.3.0.  http://gcc.gnu.org/PR35546 .  This
 209 // can probably be removed after the bug has been fixed for a while.
 210 #ifdef HAVE_TEMPLATE_ATTRIBUTES
 211 #define TEMPLATE_ATTRIBUTE_PRINTF_4 ATTRIBUTE_PRINTF_4
 212 #else
 213 #define TEMPLATE_ATTRIBUTE_PRINTF_4
 214 #endif
 215
 216 // This function is called to issue an error at the location of a
 217 // reloc.
 218 template<int size, bool big_endian>
 219 extern void
 220 gold_error_at_location(const Relocate_info<size, big_endian>*,
 221                        size_t, off_t, const char* format, ...)
 222   TEMPLATE_ATTRIBUTE_PRINTF_4;
 223
 224 // This function is called to issue a warning at the location of a
 225 // reloc.
 226 template<int size, bool big_endian>
 227 extern void
 228 gold_warning_at_location(const Relocate_info<size, big_endian>*,
 229                          size_t, off_t, const char* format, ...)
 230   TEMPLATE_ATTRIBUTE_PRINTF_4;
 231
 232 // This function is called to report an undefined symbol without
 233 // a relocation (e.g., referenced by a dynamic object).  SYM is
 234 // the undefined symbol.  The file name associated with the SYM
 235 // is used to print a location for the undefined symbol.
 236 extern void
 237 gold_undefined_symbol(const Symbol*);
 238
 239 // This function is called to report an undefined symbol resulting
 240 // from a relocation.  SYM is the undefined symbol.  RELINFO is the
 241 // general relocation info.  RELNUM is the number of the reloc,
 242 // and RELOFFSET is the reloc's offset.
 243 template<int size, bool big_endian>
 244 extern void
 245 gold_undefined_symbol_at_location(const Symbol*,
 246                                   const Relocate_info<size, big_endian>*,
 247                                   size_t, off_t);
 248
 249 // This is function is called in some cases if we run out of memory.
 250 extern void
 251 gold_nomem() ATTRIBUTE_NORETURN;
 252
 253 // This macro and function are used in cases which can not arise if
 254 // the code is written correctly.
 255
 256 #define gold_unreachable() \
 257   (gold::do_gold_unreachable(__FILE__, __LINE__, __FUNCTION__))
 258
 259 extern void do_gold_unreachable(const char*, int, const char*)
 260   ATTRIBUTE_NORETURN;
 261
 262 // Assertion check.
 263
 264 #define gold_assert(expr) ((void)(!(expr) ? gold_unreachable(), 0 : 0))
 265
 266 // Print version information.
 267 extern void
 268 print_version(bool print_short);
 269
 270 // Get the version string.
 271 extern const char*
 272 get_version_string();
 273
 274 // Convert numeric types without unnoticed loss of precision.
 275 template<typename To, typename From>
 276 inline To
 277 convert_types(const From from)
 278 {
 279   To to = from;
 280   gold_assert(static_cast<From>(to) == from);
 281   return to;
 282 }
 283
 284 // A common case of convert_types<>: convert to section_size_type.
 285 template<typename From>
 286 inline section_size_type
 287 convert_to_section_size_type(const From from)
 288 { return convert_types<section_size_type, From>(from); }
 289
 290 // Queue up the first set of tasks.
 291 extern void
 292 queue_initial_tasks(const General_options&,
 293                     Dirsearch&,
 294                     const Command_line&,
 295                     Workqueue*,
 296                     Input_objects*,
 297                     Symbol_table*,
 298                     Layout*,
 299                     Mapfile*);
 300
 301 // Queue up the set of tasks to be done before
 302 // the middle set of tasks.  Only used when garbage
 303 // collection is to be done.
 304 extern void
 305 queue_middle_gc_tasks(const General_options&,
 306                       const Task*,
 307                       const Input_objects*,
 308                       Symbol_table*,
 309                       Layout*,
 310                       Workqueue*,
 311                       Mapfile*);
 312
 313 // Queue up the middle set of tasks.
 314 extern void
 315 queue_middle_tasks(const General_options&,
 316                    const Task*,
 317                    const Input_objects*,
 318                    Symbol_table*,
 319                    Layout*,
 320                    Workqueue*,
 321                    Mapfile*);
 322
 323 // Queue up the final set of tasks.
 324 extern void
 325 queue_final_tasks(const General_options&,
 326                   const Input_objects*,
 327                   const Symbol_table*,
 328                   Layout*,
 329                   Workqueue*,
 330                   Output_file* of);
 331
 332 inline bool
 333 is_prefix_of(const char* prefix, const char* str)
 334 {
 335   return strncmp(prefix, str, strlen(prefix)) == 0;
 336 }
 337
 338 } // End namespace gold.
 339
 340 #endif // !defined(GOLD_GOLD_H)