ld/ldemul.c

   1 /* ldemul.c -- clearing house for ld emulation states
   2    Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
   3    2001, 2002, 2003, 2005
   4    Free Software Foundation, Inc.
   5
   6 This file is part of GLD, the Gnu Linker.
   7
   8 GLD is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2, or (at your option)
  11 any later version.
  12
  13 GLD is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GLD; see the file COPYING.  If not, write to the Free
  20 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
  21 02110-1301, USA.  */
  22
  23 #include "config.h"
  24 #include "bfd.h"
  25 #include "sysdep.h"
  26 #include "getopt.h"
  27 #include "bfdlink.h"
  28
  29 #include "ld.h"
  30 #include "ldmisc.h"
  31 #include "ldexp.h"
  32 #include "ldlang.h"
  33 #include "ldfile.h"
  34 #include "ldemul.h"
  35 #include "ldmain.h"
  36 #include "ldemul-list.h"
  37
  38 static ld_emulation_xfer_type *ld_emulation;
  39
  40 void
  41 ldemul_hll (char *name)
  42 {
  43   ld_emulation->hll (name);
  44 }
  45
  46 void
  47 ldemul_syslib (char *name)
  48 {
  49   ld_emulation->syslib (name);
  50 }
  51
  52 void
  53 ldemul_after_parse (void)
  54 {
  55   ld_emulation->after_parse ();
  56 }
  57
  58 void
  59 ldemul_before_parse (void)
  60 {
  61   ld_emulation->before_parse ();
  62 }
  63
  64 void
  65 ldemul_after_open (void)
  66 {
  67   ld_emulation->after_open ();
  68 }
  69
  70 void
  71 ldemul_after_allocation (void)
  72 {
  73   ld_emulation->after_allocation ();
  74 }
  75
  76 void
  77 ldemul_before_allocation (void)
  78 {
  79   ld_emulation->before_allocation ();
  80 }
  81
  82 void
  83 ldemul_set_output_arch (void)
  84 {
  85   ld_emulation->set_output_arch ();
  86 }
  87
  88 void
  89 ldemul_finish (void)
  90 {
  91   if (ld_emulation->finish)
  92     ld_emulation->finish ();
  93 }
  94
  95 void
  96 ldemul_set_symbols (void)
  97 {
  98   if (ld_emulation->set_symbols)
  99     ld_emulation->set_symbols ();
 100 }
 101
 102 void
 103 ldemul_create_output_section_statements (void)
 104 {
 105   if (ld_emulation->create_output_section_statements)
 106     ld_emulation->create_output_section_statements ();
 107 }
 108
 109 char *
 110 ldemul_get_script (int *isfile)
 111 {
 112   return ld_emulation->get_script (isfile);
 113 }
 114
 115 bfd_boolean
 116 ldemul_open_dynamic_archive (const char *arch, search_dirs_type *search,
 117                              lang_input_statement_type *entry)
 118 {
 119   if (ld_emulation->open_dynamic_archive)
 120     return (*ld_emulation->open_dynamic_archive) (arch, search, entry);
 121   return FALSE;
 122 }
 123
 124 bfd_boolean
 125 ldemul_place_orphan (lang_input_statement_type *file, asection *s)
 126 {
 127   if (ld_emulation->place_orphan)
 128     return (*ld_emulation->place_orphan) (file, s);
 129   return FALSE;
 130 }
 131
 132 void
 133 ldemul_add_options (int ns, char **shortopts, int nl,
 134                     struct option **longopts, int nrl,
 135                     struct option **really_longopts)
 136 {
 137   if (ld_emulation->add_options)
 138     (*ld_emulation->add_options) (ns, shortopts, nl, longopts,
 139                                   nrl, really_longopts);
 140 }
 141
 142 bfd_boolean
 143 ldemul_handle_option (int optc)
 144 {
 145   if (ld_emulation->handle_option)
 146     return (*ld_emulation->handle_option) (optc);
 147   return FALSE;
 148 }
 149
 150 bfd_boolean
 151 ldemul_parse_args (int argc, char **argv)
 152 {
 153   /* Try and use the emulation parser if there is one.  */
 154   if (ld_emulation->parse_args)
 155     return (*ld_emulation->parse_args) (argc, argv);
 156   return FALSE;
 157 }
 158
 159 /* Let the emulation code handle an unrecognized file.  */
 160
 161 bfd_boolean
 162 ldemul_unrecognized_file (lang_input_statement_type *entry)
 163 {
 164   if (ld_emulation->unrecognized_file)
 165     return (*ld_emulation->unrecognized_file) (entry);
 166   return FALSE;
 167 }
 168
 169 /* Let the emulation code handle a recognized file.  */
 170
 171 bfd_boolean
 172 ldemul_recognized_file (lang_input_statement_type *entry)
 173 {
 174   if (ld_emulation->recognized_file)
 175     return (*ld_emulation->recognized_file) (entry);
 176   return FALSE;
 177 }
 178
 179 char *
 180 ldemul_choose_target (int argc, char **argv)
 181 {
 182   return ld_emulation->choose_target (argc, argv);
 183 }
 184
 185
 186 /* The default choose_target function.  */
 187
 188 char *
 189 ldemul_default_target (int argc ATTRIBUTE_UNUSED, char **argv ATTRIBUTE_UNUSED)
 190 {
 191   char *from_outside = getenv (TARGET_ENVIRON);
 192   if (from_outside != (char *) NULL)
 193     return from_outside;
 194   return ld_emulation->target_name;
 195 }
 196
 197 void
 198 after_parse_default (void)
 199 {
 200 }
 201
 202 void
 203 after_open_default (void)
 204 {
 205 }
 206
 207 void
 208 after_allocation_default (void)
 209 {
 210 }
 211
 212 void
 213 before_allocation_default (void)
 214 {
 215   if (!link_info.relocatable)
 216     strip_excluded_output_sections ();
 217 }
 218
 219 void
 220 set_output_arch_default (void)
 221 {
 222   /* Set the output architecture and machine if possible.  */
 223   bfd_set_arch_mach (output_bfd,
 224                      ldfile_output_architecture, ldfile_output_machine);
 225 }
 226
 227 void
 228 syslib_default (char *ignore ATTRIBUTE_UNUSED)
 229 {
 230   info_msg (_("%S SYSLIB ignored\n"));
 231 }
 232
 233 void
 234 hll_default (char *ignore ATTRIBUTE_UNUSED)
 235 {
 236   info_msg (_("%S HLL ignored\n"));
 237 }
 238
 239 ld_emulation_xfer_type *ld_emulations[] = { EMULATION_LIST };
 240
 241 void
 242 ldemul_choose_mode (char *target)
 243 {
 244   ld_emulation_xfer_type **eptr = ld_emulations;
 245   /* Ignore "gld" prefix.  */
 246   if (target[0] == 'g' && target[1] == 'l' && target[2] == 'd')
 247     target += 3;
 248   for (; *eptr; eptr++)
 249     {
 250       if (strcmp (target, (*eptr)->emulation_name) == 0)
 251         {
 252           ld_emulation = *eptr;
 253           return;
 254         }
 255     }
 256   einfo (_("%P: unrecognised emulation mode: %s\n"), target);
 257   einfo (_("Supported emulations: "));
 258   ldemul_list_emulations (stderr);
 259   einfo ("%F\n");
 260 }
 261
 262 void
 263 ldemul_list_emulations (FILE *f)
 264 {
 265   ld_emulation_xfer_type **eptr = ld_emulations;
 266   bfd_boolean first = TRUE;
 267
 268   for (; *eptr; eptr++)
 269     {
 270       if (first)
 271         first = FALSE;
 272       else
 273         fprintf (f, " ");
 274       fprintf (f, "%s", (*eptr)->emulation_name);
 275     }
 276 }
 277
 278 void
 279 ldemul_list_emulation_options (FILE *f)
 280 {
 281   ld_emulation_xfer_type **eptr;
 282   int options_found = 0;
 283
 284   for (eptr = ld_emulations; *eptr; eptr++)
 285     {
 286       ld_emulation_xfer_type *emul = *eptr;
 287
 288       if (emul->list_options)
 289         {
 290           fprintf (f, "%s: \n", emul->emulation_name);
 291
 292           emul->list_options (f);
 293
 294           options_found = 1;
 295         }
 296     }
 297
 298   if (! options_found)
 299     fprintf (f, _("  no emulation specific options.\n"));
 300 }
 301
 302 int
 303 ldemul_find_potential_libraries (char *name, lang_input_statement_type *entry)
 304 {
 305   if (ld_emulation->find_potential_libraries)
 306     return ld_emulation->find_potential_libraries (name, entry);
 307
 308   return 0;
 309 }
 310
 311 struct bfd_elf_version_expr *
 312 ldemul_new_vers_pattern (struct bfd_elf_version_expr *entry)
 313 {
 314   if (ld_emulation->new_vers_pattern)
 315     entry = (*ld_emulation->new_vers_pattern) (entry);
 316   return entry;
 317 }