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 /* Look in this environment name for the linker to pretend to be */
  49 #define EMULATION_ENVIRON "LDEMULATION"
  50 /* If in there look for the strings: */
  51
  52 /* Look in this variable for a target format */
  53 #define TARGET_ENVIRON "GNUTARGET"
  54
  55 /* Input sections which are put in a section of this name are actually
  56    discarded.  */
  57 #define DISCARD_SECTION_NAME "/DISCARD/"
  58
  59 /* A file name list */
  60 typedef struct name_list
  61 {
  62    const char *name;
  63    struct name_list *next;
  64 } name_list;
  65
  66 /* A wildcard specification.  This is only used in ldgram.y, but it
  67    winds up in ldgram.h, so we need to define it outside.  */
  68
  69 struct wildcard_spec
  70 {
  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 {
  79   /* Pointer to the section where this data will go */
  80   struct lang_input_statement_struct *file;
  81 } section_userdata_type;
  82
  83
  84 #define get_userdata(x) ((x)->userdata)
  85
  86 #define BYTE_SIZE       (1)
  87 #define SHORT_SIZE      (2)
  88 #define LONG_SIZE       (4)
  89 #define QUAD_SIZE       (8)
  90
  91 /* ALIGN macro changed to ALIGN_N to avoid      */
  92 /* conflict in /usr/include/machine/machparam.h */
  93 /* WARNING: If THIS is a 64 bit address and BOUNDARY is a 32 bit int,
  94    you must coerce boundary to the same type as THIS.
  95    ??? Is there a portable way to avoid this.  */
  96 #define ALIGN_N(this, boundary) \
  97   ((( (this) + ((boundary) -1)) & (~((boundary)-1))))
  98
  99 typedef struct
 100 {
 101   /* 1 => assign space to common symbols even if `relocatable_output'.  */
 102   boolean force_common_definition;
 103   boolean relax;
 104
 105   /* Name of runtime interpreter to invoke.  */
 106   char *interpreter;
 107
 108   /* Name to give runtime libary from the -soname argument.  */
 109   char *soname;
 110
 111   /* Runtime library search path from the -rpath argument.  */
 112   char *rpath;
 113
 114   /* Link time runtime library search path from the -rpath-link
 115      argument.  */
 116   char *rpath_link;
 117
 118   /* Big or little endian as set on command line.  */
 119   enum { ENDIAN_UNSET = 0, ENDIAN_BIG, ENDIAN_LITTLE } endian;
 120
 121   /* If true, export all symbols in the dynamic symbol table of an ELF
 122      executable.  */
 123   boolean export_dynamic;
 124
 125   /* If true, build MIPS embedded PIC relocation tables in the output
 126      file.  */
 127   boolean embedded_relocs;
 128
 129   /* If true, force generation of a file with a .exe file. */
 130   boolean force_exe_suffix;
 131
 132   /* If true, generate a cross reference report.  */
 133   boolean cref;
 134
 135   /* If true (which is the default), warn about mismatched input
 136      files.  */
 137   boolean warn_mismatch;
 138
 139   /* Remove unreferenced sections?  */
 140   boolean gc_sections;
 141
 142   /* Name of shared object whose symbol table should be filtered with
 143      this shared object.  From the --filter option.  */
 144   char *filter_shlib;
 145
 146   /* Name of shared object for whose symbol table this shared object
 147      is an auxiliary filter.  From the --auxiliary option.  */
 148   char **auxiliary_filters;
 149
 150   /* A version symbol to be applied to the symbol names found in the
 151      .exports sections.  */
 152   char *version_exports_section;
 153
 154   /* If true (the default) check section addresses, once compute,
 155      fpor overlaps.  */
 156   boolean check_section_addresses;
 157
 158 } args_type;
 159
 160 extern args_type command_line;
 161
 162 typedef int token_code_type;
 163
 164 typedef struct
 165 {
 166   bfd_size_type specified_data_size;
 167   boolean magic_demand_paged;
 168   boolean make_executable;
 169
 170   /* If true, doing a dynamic link.  */
 171   boolean dynamic_link;
 172
 173   /* If true, -shared is supported.  */
 174   /* ??? A better way to do this is perhaps to define this in the
 175      ld_emulation_xfer_struct since this is really a target dependent
 176      parameter.  */
 177   boolean has_shared;
 178
 179   /* If true, build constructors.  */
 180   boolean build_constructors;
 181
 182   /* If true, warn about any constructors.  */
 183   boolean warn_constructors;
 184
 185   /* If true, warn about merging common symbols with others.  */
 186   boolean warn_common;
 187
 188   /* If true, only warn once about a particular undefined symbol.  */
 189   boolean warn_once;
 190
 191   /* If true, warn if multiple global-pointers are needed (Alpha
 192      only).  */
 193   boolean warn_multiple_gp;
 194
 195   /* If true, warn if the starting address of an output section
 196      changes due to the alignment of an input section.  */
 197   boolean warn_section_align;
 198
 199   boolean sort_common;
 200
 201   boolean text_read_only;
 202
 203   char *map_filename;
 204   FILE *map_file;
 205
 206   boolean stats;
 207
 208   int split_by_reloc;
 209   boolean split_by_file;
 210 } ld_config_type;
 211
 212 extern ld_config_type config;
 213
 214 typedef enum
 215 {
 216   lang_first_phase_enum,
 217   lang_allocating_phase_enum,
 218   lang_final_phase_enum
 219 } lang_phase_type;
 220
 221 extern boolean had_script;
 222 extern boolean force_make_executable;
 223
 224 /* Non-zero if we are processing a --defsym from the command line.  */
 225 extern int parsing_defsym;
 226
 227 extern int yyparse PARAMS ((void));
 228
 229 extern void add_cref PARAMS ((const char *, bfd *, asection *, bfd_vma));
 230 extern void output_cref PARAMS ((FILE *));
 231 extern void check_nocrossrefs PARAMS ((void));
 232
 233 extern void ld_abort PARAMS ((const char *, int, const char *))
 234      ATTRIBUTE_NORETURN;
 235
 236 /* If gcc, we can give a function name, too.  */
 237 #if !defined (__GNUC__) || __GNUC_MINOR__ <= 5
 238 #define __PRETTY_FUNCTION__  ((char*) NULL)
 239 #endif
 240
 241 #undef abort
 242 #define abort() ld_abort (__FILE__, __LINE__, __PRETTY_FUNCTION__)
 243
 244 #endif