toolchain/binutils/ld/ldemul.c

   1 /* ldemul.c -- clearing house for ld emulation states
   2    Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 2000, 2002, 2003
   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 #include "bfd.h"
  23 #include "sysdep.h"
  24 #include "getopt.h"
  25
  26 #include "ld.h"
  27 #include "ldmisc.h"
  28 #include "ldexp.h"
  29 #include "ldlang.h"
  30 #include "ldfile.h"
  31 #include "ldemul.h"
  32 #include "ldmain.h"
  33 #include "ldemul-list.h"
  34
  35 ld_emulation_xfer_type *ld_emulation;
  36
  37 void
  38 ldemul_hll (char *name)
  39 {
  40   ld_emulation->hll (name);
  41 }
  42
  43 void
  44 ldemul_syslib (char *name)
  45 {
  46   ld_emulation->syslib (name);
  47 }
  48
  49 void
  50 ldemul_after_parse (void)
  51 {
  52   ld_emulation->after_parse ();
  53 }
  54
  55 void
  56 ldemul_before_parse (void)
  57 {
  58   ld_emulation->before_parse ();
  59 }
  60
  61 void
  62 ldemul_after_open (void)
  63 {
  64   ld_emulation->after_open ();
  65 }
  66
  67 void
  68 ldemul_after_allocation (void)
  69 {
  70   ld_emulation->after_allocation ();
  71 }
  72
  73 void
  74 ldemul_before_allocation (void)
  75 {
  76   if (ld_emulation->before_allocation)
  77     ld_emulation->before_allocation ();
  78 }
  79
  80 void
  81 ldemul_set_output_arch (void)
  82 {
  83   ld_emulation->set_output_arch ();
  84 }
  85
  86 void
  87 ldemul_finish (void)
  88 {
  89   if (ld_emulation->finish)
  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 bfd_boolean
 123 ldemul_place_orphan (lang_input_statement_type *file, asection *s)
 124 {
 125   if (ld_emulation->place_orphan)
 126     return (*ld_emulation->place_orphan) (file, s);
 127   return FALSE;
 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 }
 209
 210 void
 211 before_allocation_default (void)
 212 {
 213 }
 214
 215 void
 216 set_output_arch_default (void)
 217 {
 218   /* Set the output architecture and machine if possible.  */
 219   bfd_set_arch_mach (output_bfd,
 220                      ldfile_output_architecture, ldfile_output_machine);
 221 }
 222
 223 void
 224 syslib_default (char *ignore ATTRIBUTE_UNUSED)
 225 {
 226   info_msg (_("%S SYSLIB ignored\n"));
 227 }
 228
 229 void
 230 hll_default (char *ignore ATTRIBUTE_UNUSED)
 231 {
 232   info_msg (_("%S HLL ignored\n"));
 233 }
 234
 235 ld_emulation_xfer_type *ld_emulations[] = { EMULATION_LIST };
 236
 237 void
 238 ldemul_choose_mode (char *target)
 239 {
 240   ld_emulation_xfer_type **eptr = ld_emulations;
 241   /* Ignore "gld" prefix.  */
 242   if (target[0] == 'g' && target[1] == 'l' && target[2] == 'd')
 243     target += 3;
 244   for (; *eptr; eptr++)
 245     {
 246       if (strcmp (target, (*eptr)->emulation_name) == 0)
 247         {
 248           ld_emulation = *eptr;
 249           return;
 250         }
 251     }
 252   einfo (_("%P: unrecognised emulation mode: %s\n"), target);
 253   einfo (_("Supported emulations: "));
 254   ldemul_list_emulations (stderr);
 255   einfo ("%F\n");
 256 }
 257
 258 void
 259 ldemul_list_emulations (FILE *f)
 260 {
 261   ld_emulation_xfer_type **eptr = ld_emulations;
 262   bfd_boolean first = TRUE;
 263
 264   for (; *eptr; eptr++)
 265     {
 266       if (first)
 267         first = FALSE;
 268       else
 269         fprintf (f, " ");
 270       fprintf (f, "%s", (*eptr)->emulation_name);
 271     }
 272 }
 273
 274 void
 275 ldemul_list_emulation_options (FILE *f)
 276 {
 277   ld_emulation_xfer_type **eptr;
 278   int options_found = 0;
 279
 280   for (eptr = ld_emulations; *eptr; eptr++)
 281     {
 282       ld_emulation_xfer_type *emul = *eptr;
 283
 284       if (emul->list_options)
 285         {
 286           fprintf (f, "%s: \n", emul->emulation_name);
 287
 288           emul->list_options (f);
 289
 290           options_found = 1;
 291         }
 292     }
 293
 294   if (! options_found)
 295     fprintf (f, _("  no emulation specific options.\n"));
 296 }
 297
 298 int
 299 ldemul_find_potential_libraries (char *name, lang_input_statement_type *entry)
 300 {
 301   if (ld_emulation->find_potential_libraries)
 302     return ld_emulation->find_potential_libraries (name, entry);
 303
 304   return 0;
 305 }
 306
 307 struct bfd_elf_version_expr *
 308 ldemul_new_vers_pattern (struct bfd_elf_version_expr *entry)
 309 {
 310   if (ld_emulation->new_vers_pattern)
 311     entry = (*ld_emulation->new_vers_pattern) (entry);
 312   return entry;
 313 }