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, 2007, 2008, 2009
   4    Free Software Foundation, Inc.
   5
   6    This file is part of the GNU Binutils.
   7
   8    This program 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 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program 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 this program; if not, write to the Free Software
  20    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  21    MA 02110-1301, USA.  */
  22
  23 #include "sysdep.h"
  24 #include "bfd.h"
  25 #include "getopt.h"
  26 #include "bfdlink.h"
  27
  28 #include "ld.h"
  29 #include "ldmisc.h"
  30 #include "ldexp.h"
  31 #include "ldlang.h"
  32 #include "ldfile.h"
  33 #include "ldemul.h"
  34 #include "ldmain.h"
  35 #include "ldemul-list.h"
  36
  37 static ld_emulation_xfer_type *ld_emulation;
  38
  39 void
  40 ldemul_hll (char *name)
  41 {
  42   ld_emulation->hll (name);
  43 }
  44
  45 void
  46 ldemul_syslib (char *name)
  47 {
  48   ld_emulation->syslib (name);
  49 }
  50
  51 void
  52 ldemul_after_parse (void)
  53 {
  54   ld_emulation->after_parse ();
  55 }
  56
  57 void
  58 ldemul_before_parse (void)
  59 {
  60   ld_emulation->before_parse ();
  61 }
  62
  63 void
  64 ldemul_after_open (void)
  65 {
  66   ld_emulation->after_open ();
  67 }
  68
  69 void
  70 ldemul_after_allocation (void)
  71 {
  72   ld_emulation->after_allocation ();
  73 }
  74
  75 void
  76 ldemul_before_allocation (void)
  77 {
  78   ld_emulation->before_allocation ();
  79 }
  80
  81 void
  82 ldemul_set_output_arch (void)
  83 {
  84   ld_emulation->set_output_arch ();
  85 }
  86
  87 void
  88 ldemul_finish (void)
  89 {
  90   ld_emulation->finish ();
  91 }
  92
  93 void
  94 ldemul_set_symbols (void)
  95 {
  96   if (ld_emulation->set_symbols)
  97     ld_emulation->set_symbols ();
  98 }
  99
 100 void
 101 ldemul_create_output_section_statements (void)
 102 {
 103   if (ld_emulation->create_output_section_statements)
 104     ld_emulation->create_output_section_statements ();
 105 }
 106
 107 char *
 108 ldemul_get_script (int *isfile)
 109 {
 110   return ld_emulation->get_script (isfile);
 111 }
 112
 113 bfd_boolean
 114 ldemul_open_dynamic_archive (const char *arch, search_dirs_type *search,
 115                              lang_input_statement_type *entry)
 116 {
 117   if (ld_emulation->open_dynamic_archive)
 118     return (*ld_emulation->open_dynamic_archive) (arch, search, entry);
 119   return FALSE;
 120 }
 121
 122 lang_output_section_statement_type *
 123 ldemul_place_orphan (asection *s, const char *name, int constraint)
 124 {
 125   if (ld_emulation->place_orphan)
 126     return (*ld_emulation->place_orphan) (s, name, constraint);
 127   return NULL;
 128 }
 129
 130 void
 131 ldemul_add_options (int ns, char **shortopts, int nl,
 132                     struct option **longopts, int nrl,
 133                     struct option **really_longopts)
 134 {
 135   if (ld_emulation->add_options)
 136     (*ld_emulation->add_options) (ns, shortopts, nl, longopts,
 137                                   nrl, really_longopts);
 138 }
 139
 140 bfd_boolean
 141 ldemul_handle_option (int optc)
 142 {
 143   if (ld_emulation->handle_option)
 144     return (*ld_emulation->handle_option) (optc);
 145   return FALSE;
 146 }
 147
 148 bfd_boolean
 149 ldemul_parse_args (int argc, char **argv)
 150 {
 151   /* Try and use the emulation parser if there is one.  */
 152   if (ld_emulation->parse_args)
 153     return (*ld_emulation->parse_args) (argc, argv);
 154   return FALSE;
 155 }
 156
 157 /* Let the emulation code handle an unrecognized file.  */
 158
 159 bfd_boolean
 160 ldemul_unrecognized_file (lang_input_statement_type *entry)
 161 {
 162   if (ld_emulation->unrecognized_file)
 163     return (*ld_emulation->unrecognized_file) (entry);
 164   return FALSE;
 165 }
 166
 167 /* Let the emulation code handle a recognized file.  */
 168
 169 bfd_boolean
 170 ldemul_recognized_file (lang_input_statement_type *entry)
 171 {
 172   if (ld_emulation->recognized_file)
 173     return (*ld_emulation->recognized_file) (entry);
 174   return FALSE;
 175 }
 176
 177 char *
 178 ldemul_choose_target (int argc, char **argv)
 179 {
 180   return ld_emulation->choose_target (argc, argv);
 181 }
 182
 183
 184 /* The default choose_target function.  */
 185
 186 char *
 187 ldemul_default_target (int argc ATTRIBUTE_UNUSED, char **argv ATTRIBUTE_UNUSED)
 188 {
 189   char *from_outside = getenv (TARGET_ENVIRON);
 190   if (from_outside != (char *) NULL)
 191     return from_outside;
 192   return ld_emulation->target_name;
 193 }
 194
 195 void
 196 after_parse_default (void)
 197 {
 198 }
 199
 200 void
 201 after_open_default (void)
 202 {
 203 }
 204
 205 void
 206 after_allocation_default (void)
 207 {
 208   lang_relax_sections (FALSE);
 209 }
 210
 211 void
 212 before_allocation_default (void)
 213 {
 214   if (!link_info.relocatable)
 215     strip_excluded_output_sections ();
 216 }
 217
 218 void
 219 finish_default (void)
 220 {
 221   if (!link_info.relocatable)
 222     _bfd_fix_excluded_sec_syms (link_info.output_bfd, &link_info);
 223 }
 224
 225 void
 226 set_output_arch_default (void)
 227 {
 228   /* Set the output architecture and machine if possible.  */
 229   bfd_set_arch_mach (link_info.output_bfd,
 230                      ldfile_output_architecture, ldfile_output_machine);
 231
 232   bfd_emul_set_maxpagesize (output_target, config.maxpagesize);
 233   bfd_emul_set_commonpagesize (output_target, config.commonpagesize);
 234 }
 235
 236 void
 237 syslib_default (char *ignore ATTRIBUTE_UNUSED)
 238 {
 239   info_msg (_("%S SYSLIB ignored\n"));
 240 }
 241
 242 void
 243 hll_default (char *ignore ATTRIBUTE_UNUSED)
 244 {
 245   info_msg (_("%S HLL ignored\n"));
 246 }
 247
 248 ld_emulation_xfer_type *ld_emulations[] = { EMULATION_LIST };
 249
 250 void
 251 ldemul_choose_mode (char *target)
 252 {
 253   ld_emulation_xfer_type **eptr = ld_emulations;
 254   /* Ignore "gld" prefix.  */
 255   if (target[0] == 'g' && target[1] == 'l' && target[2] == 'd')
 256     target += 3;
 257   for (; *eptr; eptr++)
 258     {
 259       if (strcmp (target, (*eptr)->emulation_name) == 0)
 260         {
 261           ld_emulation = *eptr;
 262           return;
 263         }
 264     }
 265   einfo (_("%P: unrecognised emulation mode: %s\n"), target);
 266   einfo (_("Supported emulations: "));
 267   ldemul_list_emulations (stderr);
 268   einfo ("%F\n");
 269 }
 270
 271 void
 272 ldemul_list_emulations (FILE *f)
 273 {
 274   ld_emulation_xfer_type **eptr = ld_emulations;
 275   bfd_boolean first = TRUE;
 276
 277   for (; *eptr; eptr++)
 278     {
 279       if (first)
 280         first = FALSE;
 281       else
 282         fprintf (f, " ");
 283       fprintf (f, "%s", (*eptr)->emulation_name);
 284     }
 285 }
 286
 287 void
 288 ldemul_list_emulation_options (FILE *f)
 289 {
 290   ld_emulation_xfer_type **eptr;
 291   int options_found = 0;
 292
 293   for (eptr = ld_emulations; *eptr; eptr++)
 294     {
 295       ld_emulation_xfer_type *emul = *eptr;
 296
 297       if (emul->list_options)
 298         {
 299           fprintf (f, "%s: \n", emul->emulation_name);
 300
 301           emul->list_options (f);
 302
 303           options_found = 1;
 304         }
 305     }
 306
 307   if (! options_found)
 308     fprintf (f, _("  no emulation specific options.\n"));
 309 }
 310
 311 int
 312 ldemul_find_potential_libraries (char *name, lang_input_statement_type *entry)
 313 {
 314   if (ld_emulation->find_potential_libraries)
 315     return ld_emulation->find_potential_libraries (name, entry);
 316
 317   return 0;
 318 }
 319
 320 struct bfd_elf_version_expr *
 321 ldemul_new_vers_pattern (struct bfd_elf_version_expr *entry)
 322 {
 323   if (ld_emulation->new_vers_pattern)
 324     entry = (*ld_emulation->new_vers_pattern) (entry);
 325   return entry;
 326 }