ld/ld.h

   1 /* ld.h -- general linker header file
   2    Copyright (C) 1991, 93, 94, 95, 96, 97, 98, 99, 2000
   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 /* Extra information we hold on sections */
  77 typedef struct user_section_struct {
  78   /* Pointer to the section where this data will go */
  79   struct lang_input_statement_struct *file;
  80 } section_userdata_type;
  81
  82 #define get_userdata(x) ((x)->userdata)
  83
  84 #define BYTE_SIZE       (1)
  85 #define SHORT_SIZE      (2)
  86 #define LONG_SIZE       (4)
  87 #define QUAD_SIZE       (8)
  88
  89 /* ALIGN macro changed to ALIGN_N to avoid      */
  90 /* conflict in /usr/include/machine/machparam.h */
  91 /* WARNING: If THIS is a 64 bit address and BOUNDARY is a 32 bit int,
  92    you must coerce boundary to the same type as THIS.
  93    ??? Is there a portable way to avoid this.  */
  94 #define ALIGN_N(this, boundary) \
  95   ((( (this) + ((boundary) -1)) & (~((boundary)-1))))
  96
  97 typedef struct {
  98   /* 1 => assign space to common symbols even if `relocatable_output'.  */
  99   boolean force_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, export all symbols in the dynamic symbol table of an ELF
 119      executable.  */
 120   boolean export_dynamic;
 121
 122   /* If true, build MIPS embedded PIC relocation tables in the output
 123      file.  */
 124   boolean embedded_relocs;
 125
 126   /* If true, force generation of a file with a .exe file.  */
 127   boolean force_exe_suffix;
 128
 129   /* If true, generate a cross reference report.  */
 130   boolean cref;
 131
 132   /* If true (which is the default), warn about mismatched input
 133      files.  */
 134   boolean warn_mismatch;
 135
 136   /* Remove unreferenced sections?  */
 137   boolean gc_sections;
 138
 139   /* Name of shared object whose symbol table should be filtered with
 140      this shared object.  From the --filter option.  */
 141   char *filter_shlib;
 142
 143   /* Name of shared object for whose symbol table this shared object
 144      is an auxiliary filter.  From the --auxiliary option.  */
 145   char **auxiliary_filters;
 146
 147   /* A version symbol to be applied to the symbol names found in the
 148      .exports sections.  */
 149   char *version_exports_section;
 150
 151   /* If true (the default) check section addresses, once compute,
 152      fpor overlaps.  */
 153   boolean check_section_addresses;
 154
 155 } args_type;
 156
 157 extern args_type command_line;
 158
 159 typedef int token_code_type;
 160
 161 typedef struct {
 162   bfd_size_type specified_data_size;
 163   boolean magic_demand_paged;
 164   boolean make_executable;
 165
 166   /* If true, doing a dynamic link.  */
 167   boolean dynamic_link;
 168
 169   /* If true, -shared is supported.  */
 170   /* ??? A better way to do this is perhaps to define this in the
 171      ld_emulation_xfer_struct since this is really a target dependent
 172      parameter.  */
 173   boolean has_shared;
 174
 175   /* If true, build constructors.  */
 176   boolean build_constructors;
 177
 178   /* If true, warn about any constructors.  */
 179   boolean warn_constructors;
 180
 181   /* If true, warn about merging common symbols with others.  */
 182   boolean warn_common;
 183
 184   /* If true, only warn once about a particular undefined symbol.  */
 185   boolean warn_once;
 186
 187   /* If true, warn if multiple global-pointers are needed (Alpha
 188      only).  */
 189   boolean warn_multiple_gp;
 190
 191   /* If true, warn if the starting address of an output section
 192      changes due to the alignment of an input section.  */
 193   boolean warn_section_align;
 194
 195   boolean sort_common;
 196
 197   boolean text_read_only;
 198
 199   char *map_filename;
 200   FILE *map_file;
 201
 202   boolean stats;
 203
 204   /* If set, orphan input sections will be mapped to separate output
 205      sections.  */
 206   boolean unique_orphan_sections;
 207
 208   unsigned int split_by_reloc;
 209   bfd_size_type split_by_file;
 210 } ld_config_type;
 211
 212 extern ld_config_type config;
 213
 214 typedef enum {
 215   lang_first_phase_enum,
 216   lang_allocating_phase_enum,
 217   lang_final_phase_enum
 218 } lang_phase_type;
 219
 220 extern boolean had_script;
 221 extern boolean force_make_executable;
 222
 223 /* Non-zero if we are processing a --defsym from the command line.  */
 224 extern int parsing_defsym;
 225
 226 extern int yyparse PARAMS ((void));
 227
 228 extern void add_cref PARAMS ((const char *, bfd *, asection *, bfd_vma));
 229 extern void output_cref PARAMS ((FILE *));
 230 extern void check_nocrossrefs PARAMS ((void));
 231
 232 extern void ld_abort PARAMS ((const char *, int, const char *))
 233      ATTRIBUTE_NORETURN;
 234
 235 /* If gcc >= 2.6, we can give a function name, too.  */
 236 #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 6)
 237 #define __PRETTY_FUNCTION__  ((char*) NULL)
 238 #endif
 239
 240 #undef abort
 241 #define abort() ld_abort (__FILE__, __LINE__, __PRETTY_FUNCTION__)
 242
 243 #endif