ld/ld.h

   1 /* ld.h -- general linker header file
   2    Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2002
   3    Free Software Foundation, Inc.
   4
   5    This file is part of GLD, the Gnu Linker.
   6
   7    GLD is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2, or (at your option)
  10    any later version.
  11
  12    GLD is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with GLD; see the file COPYING.  If not, write to the Free
  19    Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  20    02111-1307, USA.  */
  21
  22 #ifndef LD_H
  23 #define LD_H
  24
  25 #ifdef HAVE_LOCALE_H
  26 # include <locale.h>
  27 #endif
  28
  29 #ifdef ENABLE_NLS
  30 # include <libintl.h>
  31 # define _(String) gettext (String)
  32 # ifdef gettext_noop
  33 #  define N_(String) gettext_noop (String)
  34 # else
  35 #  define N_(String) (String)
  36 # endif
  37 #else
  38 # define gettext(Msgid) (Msgid)
  39 # define dgettext(Domainname, Msgid) (Msgid)
  40 # define dcgettext(Domainname, Msgid, Category) (Msgid)
  41 # define textdomain(Domainname) while (0) /* nothing */
  42 # define bindtextdomain(Domainname, Dirname) while (0) /* nothing */
  43 # define _(String) (String)
  44 # define N_(String) (String)
  45 #endif
  46
  47 #include "bin-bugs.h"
  48
  49 /* Look in this environment name for the linker to pretend to be */
  50 #define EMULATION_ENVIRON "LDEMULATION"
  51 /* If in there look for the strings: */
  52
  53 /* Look in this variable for a target format */
  54 #define TARGET_ENVIRON "GNUTARGET"
  55
  56 /* Input sections which are put in a section of this name are actually
  57    discarded.  */
  58 #define DISCARD_SECTION_NAME "/DISCARD/"
  59
  60 /* A file name list */
  61 typedef struct name_list {
  62   const char *name;
  63   struct name_list *next;
  64 }
  65 name_list;
  66
  67 /* A wildcard specification.  This is only used in ldgram.y, but it
  68    winds up in ldgram.h, so we need to define it outside.  */
  69
  70 struct wildcard_spec {
  71   const char *name;
  72   struct name_list *exclude_name_list;
  73   bfd_boolean sorted;
  74 };
  75
  76 struct wildcard_list {
  77   struct wildcard_list *next;
  78   struct wildcard_spec spec;
  79 };
  80
  81 /* Extra information we hold on sections */
  82 typedef struct user_section_struct {
  83   /* Pointer to the section where this data will go */
  84   struct lang_input_statement_struct *file;
  85 } section_userdata_type;
  86
  87 #define get_userdata(x) ((x)->userdata)
  88
  89 #define BYTE_SIZE       (1)
  90 #define SHORT_SIZE      (2)
  91 #define LONG_SIZE       (4)
  92 #define QUAD_SIZE       (8)
  93
  94 typedef struct {
  95   /* 1 => assign space to common symbols even if `relocatable_output'.  */
  96   bfd_boolean force_common_definition;
  97
  98   /* 1 => do not assign addresses to common symbols.  */
  99   bfd_boolean inhibit_common_definition;
 100   bfd_boolean relax;
 101
 102   /* Name of runtime interpreter to invoke.  */
 103   char *interpreter;
 104
 105   /* Name to give runtime libary from the -soname argument.  */
 106   char *soname;
 107
 108   /* Runtime library search path from the -rpath argument.  */
 109   char *rpath;
 110
 111   /* Link time runtime library search path from the -rpath-link
 112      argument.  */
 113   char *rpath_link;
 114
 115   /* Big or little endian as set on command line.  */
 116   enum { ENDIAN_UNSET = 0, ENDIAN_BIG, ENDIAN_LITTLE } endian;
 117
 118   /* If TRUE, build MIPS embedded PIC relocation tables in the output
 119      file.  */
 120   bfd_boolean embedded_relocs;
 121
 122   /* If TRUE, force generation of a file with a .exe file.  */
 123   bfd_boolean force_exe_suffix;
 124
 125   /* If TRUE, generate a cross reference report.  */
 126   bfd_boolean cref;
 127
 128   /* If TRUE (which is the default), warn about mismatched input
 129      files.  */
 130   bfd_boolean warn_mismatch;
 131
 132   /* Remove unreferenced sections?  */
 133   bfd_boolean gc_sections;
 134
 135   /* Name of shared object whose symbol table should be filtered with
 136      this shared object.  From the --filter option.  */
 137   char *filter_shlib;
 138
 139   /* Name of shared object for whose symbol table this shared object
 140      is an auxiliary filter.  From the --auxiliary option.  */
 141   char **auxiliary_filters;
 142
 143   /* A version symbol to be applied to the symbol names found in the
 144      .exports sections.  */
 145   char *version_exports_section;
 146
 147   /* If TRUE (the default) check section addresses, once compute,
 148      fpor overlaps.  */
 149   bfd_boolean check_section_addresses;
 150
 151   /* If TRUE allow the linking of input files in an unknown architecture
 152      assuming that the user knows what they are doing.  This was the old
 153      behaviour of the linker.  The new default behaviour is to reject such
 154      input files.  */
 155   bfd_boolean accept_unknown_input_arch;
 156
 157 } args_type;
 158
 159 extern args_type command_line;
 160
 161 typedef int token_code_type;
 162
 163 typedef struct {
 164   bfd_size_type specified_data_size;
 165   bfd_boolean magic_demand_paged;
 166   bfd_boolean make_executable;
 167
 168   /* If TRUE, doing a dynamic link.  */
 169   bfd_boolean dynamic_link;
 170
 171   /* If TRUE, -shared is supported.  */
 172   /* ??? A better way to do this is perhaps to define this in the
 173      ld_emulation_xfer_struct since this is really a target dependent
 174      parameter.  */
 175   bfd_boolean has_shared;
 176
 177   /* If TRUE, build constructors.  */
 178   bfd_boolean build_constructors;
 179
 180   /* If TRUE, warn about any constructors.  */
 181   bfd_boolean warn_constructors;
 182
 183   /* If TRUE, warn about merging common symbols with others.  */
 184   bfd_boolean warn_common;
 185
 186   /* If TRUE, only warn once about a particular undefined symbol.  */
 187   bfd_boolean warn_once;
 188
 189   /* If TRUE, warn if multiple global-pointers are needed (Alpha
 190      only).  */
 191   bfd_boolean warn_multiple_gp;
 192
 193   /* If TRUE, warn if the starting address of an output section
 194      changes due to the alignment of an input section.  */
 195   bfd_boolean warn_section_align;
 196
 197   /* If TRUE, warning messages are fatal */
 198   bfd_boolean fatal_warnings;
 199
 200   bfd_boolean sort_common;
 201
 202   bfd_boolean text_read_only;
 203
 204   char *map_filename;
 205   FILE *map_file;
 206
 207   bfd_boolean stats;
 208
 209   /* If set, orphan input sections will be mapped to separate output
 210      sections.  */
 211   bfd_boolean unique_orphan_sections;
 212
 213   unsigned int split_by_reloc;
 214   bfd_size_type split_by_file;
 215
 216   /* If set, only search library directories explicitly selected
 217      on the command line.  */
 218   bfd_boolean only_cmd_line_lib_dirs;
 219 } ld_config_type;
 220
 221 extern ld_config_type config;
 222
 223 typedef enum {
 224   lang_first_phase_enum,
 225   lang_allocating_phase_enum,
 226   lang_final_phase_enum
 227 } lang_phase_type;
 228
 229 extern FILE * saved_script_handle;
 230 extern bfd_boolean force_make_executable;
 231
 232 /* Non-zero if we are processing a --defsym from the command line.  */
 233 extern int parsing_defsym;
 234
 235 extern int yyparse PARAMS ((void));
 236
 237 extern void add_cref PARAMS ((const char *, bfd *, asection *, bfd_vma));
 238 extern void output_cref PARAMS ((FILE *));
 239 extern void check_nocrossrefs PARAMS ((void));
 240
 241 extern void ld_abort PARAMS ((const char *, int, const char *))
 242      ATTRIBUTE_NORETURN;
 243
 244 /* If gcc >= 2.6, we can give a function name, too.  */
 245 #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 6)
 246 #define __PRETTY_FUNCTION__  ((char*) NULL)
 247 #endif
 248
 249 #undef abort
 250 #define abort() ld_abort (__FILE__, __LINE__, __PRETTY_FUNCTION__)
 251
 252 #endif