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   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   boolean force_common_definition;
  97
  98   /* 1 => do not assign addresses to common symbols.  */
  99   boolean inhibit_common_definition;
 100   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   boolean embedded_relocs;
 121
 122   /* If true, force generation of a file with a .exe file.  */
 123   boolean force_exe_suffix;
 124
 125   /* If true, generate a cross reference report.  */
 126   boolean cref;
 127
 128   /* If true (which is the default), warn about mismatched input
 129      files.  */
 130   boolean warn_mismatch;
 131
 132   /* Remove unreferenced sections?  */
 133   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   boolean check_section_addresses;
 150
 151 } args_type;
 152
 153 extern args_type command_line;
 154
 155 typedef int token_code_type;
 156
 157 typedef struct {
 158   bfd_size_type specified_data_size;
 159   boolean magic_demand_paged;
 160   boolean make_executable;
 161
 162   /* If true, doing a dynamic link.  */
 163   boolean dynamic_link;
 164
 165   /* If true, -shared is supported.  */
 166   /* ??? A better way to do this is perhaps to define this in the
 167      ld_emulation_xfer_struct since this is really a target dependent
 168      parameter.  */
 169   boolean has_shared;
 170
 171   /* If true, build constructors.  */
 172   boolean build_constructors;
 173
 174   /* If true, warn about any constructors.  */
 175   boolean warn_constructors;
 176
 177   /* If true, warn about merging common symbols with others.  */
 178   boolean warn_common;
 179
 180   /* If true, only warn once about a particular undefined symbol.  */
 181   boolean warn_once;
 182
 183   /* If true, warn if multiple global-pointers are needed (Alpha
 184      only).  */
 185   boolean warn_multiple_gp;
 186
 187   /* If true, warn if the starting address of an output section
 188      changes due to the alignment of an input section.  */
 189   boolean warn_section_align;
 190
 191   /* If true, warning messages are fatal */
 192   boolean fatal_warnings;
 193
 194   boolean sort_common;
 195
 196   boolean text_read_only;
 197
 198   char *map_filename;
 199   FILE *map_file;
 200
 201   boolean stats;
 202
 203   /* If set, orphan input sections will be mapped to separate output
 204      sections.  */
 205   boolean unique_orphan_sections;
 206
 207   unsigned int split_by_reloc;
 208   bfd_size_type split_by_file;
 209
 210   /* If set, only search library directories explicitly selected
 211      on the command line.  */
 212   boolean only_cmd_line_lib_dirs;
 213 } ld_config_type;
 214
 215 extern ld_config_type config;
 216
 217 typedef enum {
 218   lang_first_phase_enum,
 219   lang_allocating_phase_enum,
 220   lang_final_phase_enum
 221 } lang_phase_type;
 222
 223 extern FILE * saved_script_handle;
 224 extern boolean force_make_executable;
 225
 226 /* Non-zero if we are processing a --defsym from the command line.  */
 227 extern int parsing_defsym;
 228
 229 extern int yyparse PARAMS ((void));
 230
 231 extern void add_cref PARAMS ((const char *, bfd *, asection *, bfd_vma));
 232 extern void output_cref PARAMS ((FILE *));
 233 extern void check_nocrossrefs PARAMS ((void));
 234
 235 extern void ld_abort PARAMS ((const char *, int, const char *))
 236      ATTRIBUTE_NORETURN;
 237
 238 /* If gcc >= 2.6, we can give a function name, too.  */
 239 #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 6)
 240 #define __PRETTY_FUNCTION__  ((char*) NULL)
 241 #endif
 242
 243 #undef abort
 244 #define abort() ld_abort (__FILE__, __LINE__, __PRETTY_FUNCTION__)
 245
 246 #endif