ld/ld.h

   1 /* ld.h -- general linker header file
   2    Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
   3    2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
   4    Free Software Foundation, Inc.
   5
   6    This file is part of the GNU Binutils.
   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 LD_H
  24 #define LD_H
  25
  26 #ifdef HAVE_LOCALE_H
  27 #endif
  28 #ifndef SEEK_CUR
  29 #define SEEK_CUR 1
  30 #endif
  31 #ifndef SEEK_END
  32 #define SEEK_END 2
  33 #endif
  34
  35 #ifdef HAVE_LOCALE_H
  36 # ifndef ENABLE_NLS
  37    /* The Solaris version of locale.h always includes libintl.h.  If we have
  38       been configured with --disable-nls then ENABLE_NLS will not be defined
  39       and the dummy definitions of bindtextdomain (et al) below will conflict
  40       with the defintions in libintl.h.  So we define these values to prevent
  41       the bogus inclusion of libintl.h.  */
  42 #  define _LIBINTL_H
  43 #  define _LIBGETTEXT_H
  44 # endif
  45 # include <locale.h>
  46 #endif
  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 /* Look in this environment name for the linker to pretend to be */
  67 #define EMULATION_ENVIRON "LDEMULATION"
  68 /* If in there look for the strings: */
  69
  70 /* Look in this variable for a target format */
  71 #define TARGET_ENVIRON "GNUTARGET"
  72
  73 /* Input sections which are put in a section of this name are actually
  74    discarded.  */
  75 #define DISCARD_SECTION_NAME "/DISCARD/"
  76
  77 /* A file name list */
  78 typedef struct name_list {
  79   const char *name;
  80   struct name_list *next;
  81 }
  82 name_list;
  83
  84 typedef enum {sort_none, sort_ascending, sort_descending} sort_order;
  85
  86 /* A wildcard specification.  */
  87
  88 typedef enum {
  89   none, by_name, by_alignment, by_name_alignment, by_alignment_name,
  90   by_none, by_init_priority
  91 } sort_type;
  92
  93 extern sort_type sort_section;
  94
  95 struct wildcard_spec {
  96   const char *name;
  97   struct name_list *exclude_name_list;
  98   sort_type sorted;
  99   struct flag_info *section_flag_list;
 100 };
 101
 102 struct wildcard_list {
 103   struct wildcard_list *next;
 104   struct wildcard_spec spec;
 105 };
 106
 107 struct map_symbol_def {
 108   struct bfd_link_hash_entry *entry;
 109   struct map_symbol_def *next;
 110 };
 111
 112 #define BYTE_SIZE       (1)
 113 #define SHORT_SIZE      (2)
 114 #define LONG_SIZE       (4)
 115 #define QUAD_SIZE       (8)
 116
 117 enum endian_enum { ENDIAN_UNSET = 0, ENDIAN_BIG, ENDIAN_LITTLE };
 118
 119 enum symbolic_enum
 120   {
 121     symbolic_unset = 0,
 122     symbolic,
 123     symbolic_functions,
 124   };
 125
 126 enum dynamic_list_enum
 127   {
 128     dynamic_list_unset = 0,
 129     dynamic_list_data,
 130     dynamic_list
 131   };
 132
 133 typedef struct {
 134   /* 1 => assign space to common symbols even if `relocatable_output'.  */
 135   bfd_boolean force_common_definition;
 136
 137   /* 1 => do not assign addresses to common symbols.  */
 138   bfd_boolean inhibit_common_definition;
 139
 140   /* If TRUE, build MIPS embedded PIC relocation tables in the output
 141      file.  */
 142   bfd_boolean embedded_relocs;
 143
 144   /* If TRUE, force generation of a file with a .exe file.  */
 145   bfd_boolean force_exe_suffix;
 146
 147   /* If TRUE, generate a cross reference report.  */
 148   bfd_boolean cref;
 149
 150   /* If TRUE (which is the default), warn about mismatched input
 151      files.  */
 152   bfd_boolean warn_mismatch;
 153
 154   /* Warn on attempting to open an incompatible library during a library
 155      search.  */
 156   bfd_boolean warn_search_mismatch;
 157
 158   /* If non-zero check section addresses, once computed,
 159      for overlaps.  Relocatable links only check when this is > 0.  */
 160   signed char check_section_addresses;
 161
 162   /* If TRUE allow the linking of input files in an unknown architecture
 163      assuming that the user knows what they are doing.  This was the old
 164      behaviour of the linker.  The new default behaviour is to reject such
 165      input files.  */
 166   bfd_boolean accept_unknown_input_arch;
 167
 168   /* If TRUE we'll just print the default output on stdout.  */
 169   bfd_boolean print_output_format;
 170
 171   /* Big or little endian as set on command line.  */
 172   enum endian_enum endian;
 173
 174   /* -Bsymbolic and -Bsymbolic-functions, as set on command line.  */
 175   enum symbolic_enum symbolic;
 176
 177   /* --dynamic-list, --dynamic-list-cpp-new, --dynamic-list-cpp-typeinfo
 178      and --dynamic-list FILE, as set on command line.  */
 179   enum dynamic_list_enum dynamic_list;
 180
 181   /* Name of runtime interpreter to invoke.  */
 182   char *interpreter;
 183
 184   /* Name to give runtime libary from the -soname argument.  */
 185   char *soname;
 186
 187   /* Runtime library search path from the -rpath argument.  */
 188   char *rpath;
 189
 190   /* Link time runtime library search path from the -rpath-link
 191      argument.  */
 192   char *rpath_link;
 193
 194   /* Name of shared object whose symbol table should be filtered with
 195      this shared object.  From the --filter option.  */
 196   char *filter_shlib;
 197
 198   /* Name of shared object for whose symbol table this shared object
 199      is an auxiliary filter.  From the --auxiliary option.  */
 200   char **auxiliary_filters;
 201
 202   /* A version symbol to be applied to the symbol names found in the
 203      .exports sections.  */
 204   char *version_exports_section;
 205
 206   /* Default linker script.  */
 207   char *default_script;
 208 } args_type;
 209
 210 extern args_type command_line;
 211
 212 typedef int token_code_type;
 213
 214 typedef struct {
 215   bfd_boolean magic_demand_paged;
 216   bfd_boolean make_executable;
 217
 218   /* If TRUE, -shared is supported.  */
 219   /* ??? A better way to do this is perhaps to define this in the
 220      ld_emulation_xfer_struct since this is really a target dependent
 221      parameter.  */
 222   bfd_boolean has_shared;
 223
 224   /* If TRUE, build constructors.  */
 225   bfd_boolean build_constructors;
 226
 227   /* If TRUE, warn about any constructors.  */
 228   bfd_boolean warn_constructors;
 229
 230   /* If TRUE, warn about merging common symbols with others.  */
 231   bfd_boolean warn_common;
 232
 233   /* If TRUE, only warn once about a particular undefined symbol.  */
 234   bfd_boolean warn_once;
 235
 236   /* If TRUE, warn if multiple global-pointers are needed (Alpha
 237      only).  */
 238   bfd_boolean warn_multiple_gp;
 239
 240   /* If TRUE, warn if the starting address of an output section
 241      changes due to the alignment of an input section.  */
 242   bfd_boolean warn_section_align;
 243
 244   /* If TRUE, warning messages are fatal */
 245   bfd_boolean fatal_warnings;
 246
 247   sort_order sort_common;
 248
 249   bfd_boolean text_read_only;
 250
 251   bfd_boolean stats;
 252
 253   /* If set, orphan input sections will be mapped to separate output
 254      sections.  */
 255   bfd_boolean unique_orphan_sections;
 256
 257   /* If set, only search library directories explicitly selected
 258      on the command line.  */
 259   bfd_boolean only_cmd_line_lib_dirs;
 260
 261   /* If set, numbers and absolute symbols are simply treated as
 262      numbers everywhere.  */
 263   bfd_boolean sane_expr;
 264
 265   /* If set, code and non-code sections should never be in one segment.  */
 266   bfd_boolean separate_code;
 267
 268   /* The rpath separation character.  Usually ':'.  */
 269   char rpath_separator;
 270
 271   char *map_filename;
 272   FILE *map_file;
 273
 274   unsigned int split_by_reloc;
 275   bfd_size_type split_by_file;
 276
 277   bfd_size_type specified_data_size;
 278
 279   /* The size of the hash table to use.  */
 280   unsigned long hash_table_size;
 281
 282   /* The maximum page size for ELF.  */
 283   bfd_vma maxpagesize;
 284
 285   /* The common page size for ELF.  */
 286   bfd_vma commonpagesize;
 287 } ld_config_type;
 288
 289 extern ld_config_type config;
 290
 291 extern FILE * saved_script_handle;
 292 extern bfd_boolean force_make_executable;
 293
 294 extern int yyparse (void);
 295 extern void add_cref (const char *, bfd *, asection *, bfd_vma);
 296 extern bfd_boolean handle_asneeded_cref (bfd *, enum notice_asneeded_action);
 297 extern void output_cref (FILE *);
 298 extern void check_nocrossrefs (void);
 299 extern void ld_abort (const char *, int, const char *) ATTRIBUTE_NORETURN;
 300
 301 /* If gcc >= 2.6, we can give a function name, too.  */
 302 #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 6)
 303 #define __PRETTY_FUNCTION__  NULL
 304 #endif
 305
 306 #undef abort
 307 #define abort() ld_abort (__FILE__, __LINE__, __PRETTY_FUNCTION__)
 308
 309 #endif