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_do_assignments (void)
  84 {
  85   ld_emulation->do_assignments ();
  86 }
  87
  88 void
  89 ldemul_set_output_arch (void)
  90 {
  91   ld_emulation->set_output_arch ();
  92 }
  93
  94 void
  95 ldemul_finish (void)
  96 {
  97   if (ld_emulation->finish)
  98     ld_emulation->finish ();
  99 }
 100
 101 void
 102 ldemul_set_symbols (void)
 103 {
 104   if (ld_emulation->set_symbols)
 105     ld_emulation->set_symbols ();
 106 }
 107
 108 void
 109 ldemul_create_output_section_statements (void)
 110 {
 111   if (ld_emulation->create_output_section_statements)
 112     ld_emulation->create_output_section_statements ();
 113 }
 114
 115 char *
 116 ldemul_get_script (int *isfile)
 117 {
 118   return ld_emulation->get_script (isfile);
 119 }
 120
 121 bfd_boolean
 122 ldemul_open_dynamic_archive (const char *arch, search_dirs_type *search,
 123                              lang_input_statement_type *entry)
 124 {
 125   if (ld_emulation->open_dynamic_archive)
 126     return (*ld_emulation->open_dynamic_archive) (arch, search, entry);
 127   return FALSE;
 128 }
 129
 130 bfd_boolean
 131 ldemul_place_orphan (lang_input_statement_type *file, asection *s)
 132 {
 133   if (ld_emulation->place_orphan)
 134     return (*ld_emulation->place_orphan) (file, s);
 135   return FALSE;
 136 }
 137
 138 void
 139 ldemul_add_options (int ns, char **shortopts, int nl,
 140                     struct option **longopts, int nrl,
 141                     struct option **really_longopts)
 142 {
 143   if (ld_emulation->add_options)
 144     (*ld_emulation->add_options) (ns, shortopts, nl, longopts,
 145                                   nrl, really_longopts);
 146 }
 147
 148 bfd_boolean
 149 ldemul_handle_option (int optc)
 150 {
 151   if (ld_emulation->handle_option)
 152     return (*ld_emulation->handle_option) (optc);
 153   return FALSE;
 154 }
 155
 156 bfd_boolean
 157 ldemul_parse_args (int argc, char **argv)
 158 {
 159   /* Try and use the emulation parser if there is one.  */
 160   if (ld_emulation->parse_args)
 161     return (*ld_emulation->parse_args) (argc, argv);
 162   return FALSE;
 163 }
 164
 165 /* Let the emulation code handle an unrecognized file.  */
 166
 167 bfd_boolean
 168 ldemul_unrecognized_file (lang_input_statement_type *entry)
 169 {
 170   if (ld_emulation->unrecognized_file)
 171     return (*ld_emulation->unrecognized_file) (entry);
 172   return FALSE;
 173 }
 174
 175 /* Let the emulation code handle a recognized file.  */
 176
 177 bfd_boolean
 178 ldemul_recognized_file (lang_input_statement_type *entry)
 179 {
 180   if (ld_emulation->recognized_file)
 181     return (*ld_emulation->recognized_file) (entry);
 182   return FALSE;
 183 }
 184
 185 char *
 186 ldemul_choose_target (int argc, char **argv)
 187 {
 188   return ld_emulation->choose_target (argc, argv);
 189 }
 190
 191
 192 /* The default choose_target function.  */
 193
 194 char *
 195 ldemul_default_target (int argc ATTRIBUTE_UNUSED, char **argv ATTRIBUTE_UNUSED)
 196 {
 197   char *from_outside = getenv (TARGET_ENVIRON);
 198   if (from_outside != (char *) NULL)
 199     return from_outside;
 200   return ld_emulation->target_name;
 201 }
 202
 203 void
 204 after_parse_default (void)
 205 {
 206 }
 207
 208 void
 209 after_open_default (void)
 210 {
 211 }
 212
 213 void
 214 after_allocation_default (void)
 215 {
 216 }
 217
 218 void
 219 before_allocation_default (void)
 220 {
 221   if (!link_info.relocatable)
 222     strip_excluded_output_sections ();
 223 }
 224
 225 void
 226 do_assignments_default (void)
 227 {
 228 }
 229
 230 void
 231 set_output_arch_default (void)
 232 {
 233   /* Set the output architecture and machine if possible.  */
 234   bfd_set_arch_mach (output_bfd,
 235                      ldfile_output_architecture, ldfile_output_machine);
 236 }
 237
 238 void
 239 syslib_default (char *ignore ATTRIBUTE_UNUSED)
 240 {
 241   info_msg (_("%S SYSLIB ignored\n"));
 242 }
 243
 244 void
 245 hll_default (char *ignore ATTRIBUTE_UNUSED)
 246 {
 247   info_msg (_("%S HLL ignored\n"));
 248 }
 249
 250 ld_emulation_xfer_type *ld_emulations[] = { EMULATION_LIST };
 251
 252 void
 253 ldemul_choose_mode (char *target)
 254 {
 255   ld_emulation_xfer_type **eptr = ld_emulations;
 256   /* Ignore "gld" prefix.  */
 257   if (target[0] == 'g' && target[1] == 'l' && target[2] == 'd')
 258     target += 3;
 259   for (; *eptr; eptr++)
 260     {
 261       if (strcmp (target, (*eptr)->emulation_name) == 0)
 262         {
 263           ld_emulation = *eptr;
 264           return;
 265         }
 266     }
 267   einfo (_("%P: unrecognised emulation mode: %s\n"), target);
 268   einfo (_("Supported emulations: "));
 269   ldemul_list_emulations (stderr);
 270   einfo ("%F\n");
 271 }
 272
 273 void
 274 ldemul_list_emulations (FILE *f)
 275 {
 276   ld_emulation_xfer_type **eptr = ld_emulations;
 277   bfd_boolean first = TRUE;
 278
 279   for (; *eptr; eptr++)
 280     {
 281       if (first)
 282         first = FALSE;
 283       else
 284         fprintf (f, " ");
 285       fprintf (f, "%s", (*eptr)->emulation_name);
 286     }
 287 }
 288
 289 void
 290 ldemul_list_emulation_options (FILE *f)
 291 {
 292   ld_emulation_xfer_type **eptr;
 293   int options_found = 0;
 294
 295   for (eptr = ld_emulations; *eptr; eptr++)
 296     {
 297       ld_emulation_xfer_type *emul = *eptr;
 298
 299       if (emul->list_options)
 300         {
 301           fprintf (f, "%s: \n", emul->emulation_name);
 302
 303           emul->list_options (f);
 304
 305           options_found = 1;
 306         }
 307     }
 308
 309   if (! options_found)
 310     fprintf (f, _("  no emulation specific options.\n"));
 311 }
 312
 313 int
 314 ldemul_find_potential_libraries (char *name, lang_input_statement_type *entry)
 315 {
 316   if (ld_emulation->find_potential_libraries)
 317     return ld_emulation->find_potential_libraries (name, entry);
 318
 319   return 0;
 320 }
 321
 322 struct bfd_elf_version_expr *
 323 ldemul_new_vers_pattern (struct bfd_elf_version_expr *entry)
 324 {
 325   if (ld_emulation->new_vers_pattern)
 326     entry = (*ld_emulation->new_vers_pattern) (entry);
 327   return entry;
 328 }