ld/ld.h

   1 /* ld.h -- general linker header file
   2    Copyright (C) 1991, 93, 94, 95, 96, 97, 1998 Free Software Foundation, Inc.
   3
   4    This file is part of GLD, the Gnu Linker.
   5
   6    GLD is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2, or (at your option)
   9    any later version.
  10
  11    GLD is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with GLD; see the file COPYING.  If not, write to the Free
  18    Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  19    02111-1307, USA.  */
  20
  21 #ifndef LD_H
  22 #define LD_H
  23
  24 #ifdef HAVE_LOCALE_H
  25 # include <locale.h>
  26 #endif
  27
  28 #ifdef ENABLE_NLS
  29 # include <libintl.h>
  30 # define _(String) gettext (String)
  31 # ifdef gettext_noop
  32 #  define N_(String) gettext_noop (String)
  33 # else
  34 #  define N_(String) (String)
  35 # endif
  36 #else
  37 /* Stubs that do something close enough.  */
  38 # define textdomain(String) (String)
  39 # define gettext(String) (String)
  40 # define dgettext(Domain,Message) (Message)
  41 # define dcgettext(Domain,Message,Type) (Message)
  42 # define bindtextdomain(Domain,Directory) (Domain)
  43 # define _(String) (String)
  44 # define N_(String) (String)
  45 #endif
  46
  47 #ifndef LC_MESSAGES
  48 # define LC_MESSAGES 0
  49 #endif
  50
  51 /* Look in this environment name for the linker to pretend to be */
  52 #define EMULATION_ENVIRON "LDEMULATION"
  53 /* If in there look for the strings: */
  54
  55 /* Look in this variable for a target format */
  56 #define TARGET_ENVIRON "GNUTARGET"
  57
  58 /* Input sections which are put in a section of this name are actually
  59    discarded.  */
  60 #define DISCARD_SECTION_NAME "/DISCARD/"
  61
  62 /* A wildcard specification.  This is only used in ldgram.y, but it
  63    winds up in ldgram.h, so we need to define it outside.  */
  64
  65 struct wildcard_spec
  66 {
  67   const char *name;
  68   boolean sorted;
  69 };
  70
  71 /* Extra information we hold on sections */
  72 typedef struct  user_section_struct
  73 {
  74   /* Pointer to the section where this data will go */
  75   struct lang_input_statement_struct *file;
  76 } section_userdata_type;
  77
  78
  79 #define get_userdata(x) ((x)->userdata)
  80
  81 #define BYTE_SIZE       (1)
  82 #define SHORT_SIZE      (2)
  83 #define LONG_SIZE       (4)
  84 #define QUAD_SIZE       (8)
  85
  86 /* ALIGN macro changed to ALIGN_N to avoid      */
  87 /* conflict in /usr/include/machine/machparam.h */
  88 /* WARNING: If THIS is a 64 bit address and BOUNDARY is a 32 bit int,
  89    you must coerce boundary to the same type as THIS.
  90    ??? Is there a portable way to avoid this.  */
  91 #define ALIGN_N(this, boundary) \
  92   ((( (this) + ((boundary) -1)) & (~((boundary)-1))))
  93
  94 typedef struct
  95 {
  96   /* 1 => assign space to common symbols even if `relocatable_output'.  */
  97   boolean force_common_definition;
  98   boolean relax;
  99
 100   /* Name of runtime interpreter to invoke.  */
 101   char *interpreter;
 102
 103   /* Name to give runtime libary from the -soname argument.  */
 104   char *soname;
 105
 106   /* Runtime library search path from the -rpath argument.  */
 107   char *rpath;
 108
 109   /* Link time runtime library search path from the -rpath-link
 110      argument.  */
 111   char *rpath_link;
 112
 113   /* Big or little endian as set on command line.  */
 114   enum { ENDIAN_UNSET = 0, ENDIAN_BIG, ENDIAN_LITTLE } endian;
 115
 116   /* If true, export all symbols in the dynamic symbol table of an ELF
 117      executable.  */
 118   boolean export_dynamic;
 119
 120   /* If true, build MIPS embedded PIC relocation tables in the output
 121      file.  */
 122   boolean embedded_relocs;
 123
 124   /* If true, force generation of a file with a .exe file. */
 125   boolean force_exe_suffix;
 126
 127   /* If true, generate a cross reference report.  */
 128   boolean cref;
 129
 130   /* If true (which is the default), warn about mismatched input
 131      files.  */
 132   boolean warn_mismatch;
 133
 134   /* Name of shared object whose symbol table should be filtered with
 135      this shared object.  From the --filter option.  */
 136   char *filter_shlib;
 137
 138   /* Name of shared object for whose symbol table this shared object
 139      is an auxiliary filter.  From the --auxiliary option.  */
 140   char **auxiliary_filters;
 141
 142   /* Remove unreferenced sections?  */
 143   boolean gc_sections;
 144 } args_type;
 145
 146 extern args_type command_line;
 147
 148 typedef int token_code_type;
 149
 150 typedef struct
 151 {
 152   bfd_size_type specified_data_size;
 153   boolean magic_demand_paged;
 154   boolean make_executable;
 155
 156   /* If true, doing a dynamic link.  */
 157   boolean dynamic_link;
 158
 159   /* If true, -shared is supported.  */
 160   /* ??? A better way to do this is perhaps to define this in the
 161      ld_emulation_xfer_struct since this is really a target dependent
 162      parameter.  */
 163   boolean has_shared;
 164
 165   /* If true, build constructors.  */
 166   boolean build_constructors;
 167
 168   /* If true, warn about any constructors.  */
 169   boolean warn_constructors;
 170
 171   /* If true, warn about merging common symbols with others.  */
 172   boolean warn_common;
 173
 174   /* If true, only warn once about a particular undefined symbol.  */
 175   boolean warn_once;
 176
 177   /* If true, warn if multiple global-pointers are needed (Alpha
 178      only).  */
 179   boolean warn_multiple_gp;
 180
 181   /* If true, warn if the starting address of an output section
 182      changes due to the alignment of an input section.  */
 183   boolean warn_section_align;
 184
 185   boolean sort_common;
 186
 187   boolean text_read_only;
 188
 189   char *map_filename;
 190   FILE *map_file;
 191
 192   boolean stats;
 193
 194   int split_by_reloc;
 195   boolean split_by_file;
 196 } ld_config_type;
 197
 198 extern ld_config_type config;
 199
 200 typedef enum
 201 {
 202   lang_first_phase_enum,
 203   lang_allocating_phase_enum,
 204   lang_final_phase_enum
 205 } lang_phase_type;
 206
 207 extern boolean had_script;
 208 extern boolean force_make_executable;
 209
 210 /* Non-zero if we are processing a --defsym from the command line.  */
 211 extern int parsing_defsym;
 212
 213 extern int yyparse PARAMS ((void));
 214
 215 extern void add_cref PARAMS ((const char *, bfd *, asection *, bfd_vma));
 216 extern void output_cref PARAMS ((FILE *));
 217 extern void check_nocrossrefs PARAMS ((void));
 218
 219 #endif