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
   4    Free Software Foundation, Inc.
   5
   6    This file is part of GLD, the Gnu Linker.
   7
   8    GLD 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 2, or (at your option)
  11    any later version.
  12
  13    GLD 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 GLD; see the file COPYING.  If not, write to the Free
  20    Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
  21    02110-1301, USA.  */
  22
  23 #ifndef LD_H
  24 #define LD_H
  25
  26 #ifdef HAVE_LOCALE_H
  27 # include <locale.h>
  28 #endif
  29
  30 #ifdef ENABLE_NLS
  31 # include <libintl.h>
  32 # define _(String) gettext (String)
  33 # ifdef gettext_noop
  34 #  define N_(String) gettext_noop (String)
  35 # else
  36 #  define N_(String) (String)
  37 # endif
  38 #else
  39 # define gettext(Msgid) (Msgid)
  40 # define dgettext(Domainname, Msgid) (Msgid)
  41 # define dcgettext(Domainname, Msgid, Category) (Msgid)
  42 # define textdomain(Domainname) while (0) /* nothing */
  43 # define bindtextdomain(Domainname, Dirname) while (0) /* nothing */
  44 # define _(String) (String)
  45 # define N_(String) (String)
  46 #endif
  47
  48 #include "bin-bugs.h"
  49
  50 /* Look in this environment name for the linker to pretend to be */
  51 #define EMULATION_ENVIRON "LDEMULATION"
  52 /* If in there look for the strings: */
  53
  54 /* Look in this variable for a target format */
  55 #define TARGET_ENVIRON "GNUTARGET"
  56
  57 /* Input sections which are put in a section of this name are actually
  58    discarded.  */
  59 #define DISCARD_SECTION_NAME "/DISCARD/"
  60
  61 /* A file name list */
  62 typedef struct name_list {
  63   const char *name;
  64   struct name_list *next;
  65 }
  66 name_list;
  67
  68 /* A wildcard specification.  */
  69
  70 typedef enum {
  71   none, by_name, by_alignment, by_name_alignment, by_alignment_name
  72 } sort_type;
  73
  74 extern sort_type sort_section;
  75
  76 struct wildcard_spec {
  77   const char *name;
  78   struct name_list *exclude_name_list;
  79   sort_type sorted;
  80 };
  81
  82 struct wildcard_list {
  83   struct wildcard_list *next;
  84   struct wildcard_spec spec;
  85 };
  86
  87 struct map_symbol_def {
  88   struct bfd_link_hash_entry *entry;
  89   struct map_symbol_def *next;
  90 };
  91
  92 /* The initial part of fat_user_section_struct has to be idential with
  93    lean_user_section_struct.  */
  94 typedef struct fat_user_section_struct {
  95   /* For input sections, when writing a map file: head / tail of a linked
  96      list of hash table entries for symbols defined in this section.  */
  97   struct map_symbol_def *map_symbol_def_head;
  98   struct map_symbol_def **map_symbol_def_tail;
  99 } fat_section_userdata_type;
 100
 101 #define get_userdata(x) ((x)->userdata)
 102
 103 #define BYTE_SIZE       (1)
 104 #define SHORT_SIZE      (2)
 105 #define LONG_SIZE       (4)
 106 #define QUAD_SIZE       (8)
 107
 108 typedef struct {
 109   /* 1 => assign space to common symbols even if `relocatable_output'.  */
 110   bfd_boolean force_common_definition;
 111
 112   /* 1 => do not assign addresses to common symbols.  */
 113   bfd_boolean inhibit_common_definition;
 114   bfd_boolean relax;
 115
 116   /* Name of runtime interpreter to invoke.  */
 117   char *interpreter;
 118
 119   /* Name to give runtime libary from the -soname argument.  */
 120   char *soname;
 121
 122   /* Runtime library search path from the -rpath argument.  */
 123   char *rpath;
 124
 125   /* Link time runtime library search path from the -rpath-link
 126      argument.  */
 127   char *rpath_link;
 128
 129   /* Big or little endian as set on command line.  */
 130   enum { ENDIAN_UNSET = 0, ENDIAN_BIG, ENDIAN_LITTLE } endian;
 131
 132   /* If TRUE, build MIPS embedded PIC relocation tables in the output
 133      file.  */
 134   bfd_boolean embedded_relocs;
 135
 136   /* If TRUE, force generation of a file with a .exe file.  */
 137   bfd_boolean force_exe_suffix;
 138
 139   /* If TRUE, generate a cross reference report.  */
 140   bfd_boolean cref;
 141
 142   /* If TRUE (which is the default), warn about mismatched input
 143      files.  */
 144   bfd_boolean warn_mismatch;
 145
 146   /* Name of shared object whose symbol table should be filtered with
 147      this shared object.  From the --filter option.  */
 148   char *filter_shlib;
 149
 150   /* Name of shared object for whose symbol table this shared object
 151      is an auxiliary filter.  From the --auxiliary option.  */
 152   char **auxiliary_filters;
 153
 154   /* A version symbol to be applied to the symbol names found in the
 155      .exports sections.  */
 156   char *version_exports_section;
 157
 158   /* If TRUE (the default) check section addresses, once compute,
 159      fpor overlaps.  */
 160   bfd_boolean 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 reduce memory overheads, at the expense of speed.
 169      This will cause map file generation to use an O(N^2) algorithm.  */
 170   bfd_boolean reduce_memory_overheads;
 171
 172 } args_type;
 173
 174 extern args_type command_line;
 175
 176 typedef int token_code_type;
 177
 178 typedef struct {
 179   bfd_size_type specified_data_size;
 180   bfd_boolean magic_demand_paged;
 181   bfd_boolean make_executable;
 182
 183   /* If TRUE, doing a dynamic link.  */
 184   bfd_boolean dynamic_link;
 185
 186   /* If TRUE, -shared is supported.  */
 187   /* ??? A better way to do this is perhaps to define this in the
 188      ld_emulation_xfer_struct since this is really a target dependent
 189      parameter.  */
 190   bfd_boolean has_shared;
 191
 192   /* If TRUE, build constructors.  */
 193   bfd_boolean build_constructors;
 194
 195   /* If TRUE, warn about any constructors.  */
 196   bfd_boolean warn_constructors;
 197
 198   /* If TRUE, warn about merging common symbols with others.  */
 199   bfd_boolean warn_common;
 200
 201   /* If TRUE, only warn once about a particular undefined symbol.  */
 202   bfd_boolean warn_once;
 203
 204   /* If TRUE, warn if multiple global-pointers are needed (Alpha
 205      only).  */
 206   bfd_boolean warn_multiple_gp;
 207
 208   /* If TRUE, warn if the starting address of an output section
 209      changes due to the alignment of an input section.  */
 210   bfd_boolean warn_section_align;
 211
 212   /* If TRUE, warning messages are fatal */
 213   bfd_boolean fatal_warnings;
 214
 215   bfd_boolean sort_common;
 216
 217   bfd_boolean text_read_only;
 218
 219   char *map_filename;
 220   FILE *map_file;
 221
 222   bfd_boolean stats;
 223
 224   /* If set, orphan input sections will be mapped to separate output
 225      sections.  */
 226   bfd_boolean unique_orphan_sections;
 227
 228   unsigned int split_by_reloc;
 229   bfd_size_type split_by_file;
 230
 231   /* If set, only search library directories explicitly selected
 232      on the command line.  */
 233   bfd_boolean only_cmd_line_lib_dirs;
 234
 235   /* The size of the hash table to use.  */
 236   bfd_size_type hash_table_size;
 237 } ld_config_type;
 238
 239 extern ld_config_type config;
 240
 241 extern FILE * saved_script_handle;
 242 extern bfd_boolean force_make_executable;
 243
 244 /* Non-zero if we are processing a --defsym from the command line.  */
 245 extern int parsing_defsym;
 246
 247 extern int yyparse (void);
 248 extern void add_cref (const char *, bfd *, asection *, bfd_vma);
 249 extern void output_cref (FILE *);
 250 extern void check_nocrossrefs (void);
 251 extern void ld_abort (const char *, int, const char *) ATTRIBUTE_NORETURN;
 252
 253 /* If gcc >= 2.6, we can give a function name, too.  */
 254 #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 6)
 255 #define __PRETTY_FUNCTION__  NULL
 256 #endif
 257
 258 #undef abort
 259 #define abort() ld_abort (__FILE__, __LINE__, __PRETTY_FUNCTION__)
 260
 261 #endif