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 /* Stubs that do something close enough.  */
  39 # define textdomain(String) (String)
  40 # define gettext(String) (String)
  41 # define dgettext(Domain,Message) (Message)
  42 # define dcgettext(Domain,Message,Type) (Message)
  43 # define bindtextdomain(Domain,Directory) (Domain)
  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 {
  64    const char *name;
  65    struct name_list *next;
  66 } name_list;
  67
  68 /* A wildcard specification.  This is only used in ldgram.y, but it
  69    winds up in ldgram.h, so we need to define it outside.  */
  70
  71 struct wildcard_spec
  72 {
  73   const char *name;
  74   struct name_list *exclude_name_list;
  75   boolean sorted;
  76 };
  77
  78 /* Extra information we hold on sections */
  79 typedef struct  user_section_struct
  80 {
  81   /* Pointer to the section where this data will go */
  82   struct lang_input_statement_struct *file;
  83 } section_userdata_type;
  84
  85
  86 #define get_userdata(x) ((x)->userdata)
  87
  88 #define BYTE_SIZE       (1)
  89 #define SHORT_SIZE      (2)
  90 #define LONG_SIZE       (4)
  91 #define QUAD_SIZE       (8)
  92
  93 /* ALIGN macro changed to ALIGN_N to avoid      */
  94 /* conflict in /usr/include/machine/machparam.h */
  95 /* WARNING: If THIS is a 64 bit address and BOUNDARY is a 32 bit int,
  96    you must coerce boundary to the same type as THIS.
  97    ??? Is there a portable way to avoid this.  */
  98 #define ALIGN_N(this, boundary) \
  99   ((( (this) + ((boundary) -1)) & (~((boundary)-1))))
 100
 101 typedef struct
 102 {
 103   /* 1 => assign space to common symbols even if `relocatable_output'.  */
 104   boolean force_common_definition;
 105   boolean relax;
 106
 107   /* Name of runtime interpreter to invoke.  */
 108   char *interpreter;
 109
 110   /* Name to give runtime libary from the -soname argument.  */
 111   char *soname;
 112
 113   /* Runtime library search path from the -rpath argument.  */
 114   char *rpath;
 115
 116   /* Link time runtime library search path from the -rpath-link
 117      argument.  */
 118   char *rpath_link;
 119
 120   /* Big or little endian as set on command line.  */
 121   enum { ENDIAN_UNSET = 0, ENDIAN_BIG, ENDIAN_LITTLE } endian;
 122
 123   /* If true, export all symbols in the dynamic symbol table of an ELF
 124      executable.  */
 125   boolean export_dynamic;
 126
 127   /* If true, build MIPS embedded PIC relocation tables in the output
 128      file.  */
 129   boolean embedded_relocs;
 130
 131   /* If true, force generation of a file with a .exe file. */
 132   boolean force_exe_suffix;
 133
 134   /* If true, generate a cross reference report.  */
 135   boolean cref;
 136
 137   /* If true (which is the default), warn about mismatched input
 138      files.  */
 139   boolean warn_mismatch;
 140
 141   /* Remove unreferenced sections?  */
 142   boolean gc_sections;
 143
 144   /* Name of shared object whose symbol table should be filtered with
 145      this shared object.  From the --filter option.  */
 146   char *filter_shlib;
 147
 148   /* Name of shared object for whose symbol table this shared object
 149      is an auxiliary filter.  From the --auxiliary option.  */
 150   char **auxiliary_filters;
 151
 152   /* A version symbol to be applied to the symbol names found in the
 153      .exports sections.  */
 154   char *version_exports_section;
 155
 156   /* If true (the default) check section addresses, once compute,
 157      fpor overlaps.  */
 158   boolean check_section_addresses;
 159
 160 } args_type;
 161
 162 extern args_type command_line;
 163
 164 typedef int token_code_type;
 165
 166 typedef struct
 167 {
 168   bfd_size_type specified_data_size;
 169   boolean magic_demand_paged;
 170   boolean make_executable;
 171
 172   /* If true, doing a dynamic link.  */
 173   boolean dynamic_link;
 174
 175   /* If true, -shared is supported.  */
 176   /* ??? A better way to do this is perhaps to define this in the
 177      ld_emulation_xfer_struct since this is really a target dependent
 178      parameter.  */
 179   boolean has_shared;
 180
 181   /* If true, build constructors.  */
 182   boolean build_constructors;
 183
 184   /* If true, warn about any constructors.  */
 185   boolean warn_constructors;
 186
 187   /* If true, warn about merging common symbols with others.  */
 188   boolean warn_common;
 189
 190   /* If true, only warn once about a particular undefined symbol.  */
 191   boolean warn_once;
 192
 193   /* If true, warn if multiple global-pointers are needed (Alpha
 194      only).  */
 195   boolean warn_multiple_gp;
 196
 197   /* If true, warn if the starting address of an output section
 198      changes due to the alignment of an input section.  */
 199   boolean warn_section_align;
 200
 201   boolean sort_common;
 202
 203   boolean text_read_only;
 204
 205   char *map_filename;
 206   FILE *map_file;
 207
 208   boolean stats;
 209
 210   int split_by_reloc;
 211   boolean split_by_file;
 212 } ld_config_type;
 213
 214 extern ld_config_type config;
 215
 216 typedef enum
 217 {
 218   lang_first_phase_enum,
 219   lang_allocating_phase_enum,
 220   lang_final_phase_enum
 221 } lang_phase_type;
 222
 223 extern boolean had_script;
 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, we can give a function name, too.  */
 239 #if !defined (__GNUC__) || __GNUC_MINOR__ <= 5
 240 #define __PRETTY_FUNCTION__  ((char*) NULL)
 241 #endif
 242
 243 #undef abort
 244 #define abort() ld_abort (__FILE__, __LINE__, __PRETTY_FUNCTION__)
 245
 246 #endif