contrib/binutils-2.17/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   ld_emulation->finish ();
  92 }
  93
  94 void
  95 ldemul_set_symbols (void)
  96 {
  97   if (ld_emulation->set_symbols)
  98     ld_emulation->set_symbols ();
  99 }
 100
 101 void
 102 ldemul_create_output_section_statements (void)
 103 {
 104   if (ld_emulation->create_output_section_statements)
 105     ld_emulation->create_output_section_statements ();
 106 }
 107
 108 char *
 109 ldemul_get_script (int *isfile)
 110 {
 111   return ld_emulation->get_script (isfile);
 112 }
 113
 114 bfd_boolean
 115 ldemul_open_dynamic_archive (const char *arch, search_dirs_type *search,
 116                              lang_input_statement_type *entry)
 117 {
 118   if (ld_emulation->open_dynamic_archive)
 119     return (*ld_emulation->open_dynamic_archive) (arch, search, entry);
 120   return FALSE;
 121 }
 122
 123 bfd_boolean
 124 ldemul_place_orphan (asection *s)
 125 {
 126   if (ld_emulation->place_orphan)
 127     return (*ld_emulation->place_orphan) (s);
 128   return FALSE;
 129 }
 130
 131 void
 132 ldemul_add_options (int ns, char **shortopts, int nl,
 133                     struct option **longopts, int nrl,
 134                     struct option **really_longopts)
 135 {
 136   if (ld_emulation->add_options)
 137     (*ld_emulation->add_options) (ns, shortopts, nl, longopts,
 138                                   nrl, really_longopts);
 139 }
 140
 141 bfd_boolean
 142 ldemul_handle_option (int optc)
 143 {
 144   if (ld_emulation->handle_option)
 145     return (*ld_emulation->handle_option) (optc);
 146   return FALSE;
 147 }
 148
 149 bfd_boolean
 150 ldemul_parse_args (int argc, char **argv)
 151 {
 152   /* Try and use the emulation parser if there is one.  */
 153   if (ld_emulation->parse_args)
 154     return (*ld_emulation->parse_args) (argc, argv);
 155   return FALSE;
 156 }
 157
 158 /* Let the emulation code handle an unrecognized file.  */
 159
 160 bfd_boolean
 161 ldemul_unrecognized_file (lang_input_statement_type *entry)
 162 {
 163   if (ld_emulation->unrecognized_file)
 164     return (*ld_emulation->unrecognized_file) (entry);
 165   return FALSE;
 166 }
 167
 168 /* Let the emulation code handle a recognized file.  */
 169
 170 bfd_boolean
 171 ldemul_recognized_file (lang_input_statement_type *entry)
 172 {
 173   if (ld_emulation->recognized_file)
 174     return (*ld_emulation->recognized_file) (entry);
 175   return FALSE;
 176 }
 177
 178 char *
 179 ldemul_choose_target (int argc, char **argv)
 180 {
 181   return ld_emulation->choose_target (argc, argv);
 182 }
 183
 184
 185 /* The default choose_target function.  */
 186
 187 char *
 188 ldemul_default_target (int argc ATTRIBUTE_UNUSED, char **argv ATTRIBUTE_UNUSED)
 189 {
 190   char *from_outside = getenv (TARGET_ENVIRON);
 191   if (from_outside != (char *) NULL)
 192     return from_outside;
 193   return ld_emulation->target_name;
 194 }
 195
 196 void
 197 after_parse_default (void)
 198 {
 199 }
 200
 201 void
 202 after_open_default (void)
 203 {
 204 }
 205
 206 void
 207 after_allocation_default (void)
 208 {
 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 (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 (output_bfd,
 230                      ldfile_output_architecture, ldfile_output_machine);
 231 }
 232
 233 void
 234 syslib_default (char *ignore ATTRIBUTE_UNUSED)
 235 {
 236   info_msg (_("%S SYSLIB ignored\n"));
 237 }
 238
 239 void
 240 hll_default (char *ignore ATTRIBUTE_UNUSED)
 241 {
 242   info_msg (_("%S HLL ignored\n"));
 243 }
 244
 245 ld_emulation_xfer_type *ld_emulations[] = { EMULATION_LIST };
 246
 247 void
 248 ldemul_choose_mode (char *target)
 249 {
 250   ld_emulation_xfer_type **eptr = ld_emulations;
 251   /* Ignore "gld" prefix.  */
 252   if (target[0] == 'g' && target[1] == 'l' && target[2] == 'd')
 253     target += 3;
 254   for (; *eptr; eptr++)
 255     {
 256       if (strcmp (target, (*eptr)->emulation_name) == 0)
 257         {
 258           ld_emulation = *eptr;
 259           return;
 260         }
 261     }
 262   einfo (_("%P: unrecognised emulation mode: %s\n"), target);
 263   einfo (_("Supported emulations: "));
 264   ldemul_list_emulations (stderr);
 265   einfo ("%F\n");
 266 }
 267
 268 void
 269 ldemul_list_emulations (FILE *f)
 270 {
 271   ld_emulation_xfer_type **eptr = ld_emulations;
 272   bfd_boolean first = TRUE;
 273
 274   for (; *eptr; eptr++)
 275     {
 276       if (first)
 277         first = FALSE;
 278       else
 279         fprintf (f, " ");
 280       fprintf (f, "%s", (*eptr)->emulation_name);
 281     }
 282 }
 283
 284 void
 285 ldemul_list_emulation_options (FILE *f)
 286 {
 287   ld_emulation_xfer_type **eptr;
 288   int options_found = 0;
 289
 290   for (eptr = ld_emulations; *eptr; eptr++)
 291     {
 292       ld_emulation_xfer_type *emul = *eptr;
 293
 294       if (emul->list_options)
 295         {
 296           fprintf (f, "%s: \n", emul->emulation_name);
 297
 298           emul->list_options (f);
 299
 300           options_found = 1;
 301         }
 302     }
 303
 304   if (! options_found)
 305     fprintf (f, _("  no emulation specific options.\n"));
 306 }
 307
 308 int
 309 ldemul_find_potential_libraries (char *name, lang_input_statement_type *entry)
 310 {
 311   if (ld_emulation->find_potential_libraries)
 312     return ld_emulation->find_potential_libraries (name, entry);
 313
 314   return 0;
 315 }
 316
 317 struct bfd_elf_version_expr *
 318 ldemul_new_vers_pattern (struct bfd_elf_version_expr *entry)
 319 {
 320   if (ld_emulation->new_vers_pattern)
 321     entry = (*ld_emulation->new_vers_pattern) (entry);
 322   return entry;
 323 }