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
   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, 59 Temple Place - Suite 330, Boston, MA
  21 02111-1307, USA.  */
  22
  23 #include "bfd.h"
  24 #include "sysdep.h"
  25 #include "getopt.h"
  26
  27 #include "ld.h"
  28 #include "ldmisc.h"
  29 #include "ldexp.h"
  30 #include "ldlang.h"
  31 #include "ldfile.h"
  32 #include "ldemul.h"
  33 #include "ldmain.h"
  34 #include "ldemul-list.h"
  35
  36 ld_emulation_xfer_type *ld_emulation;
  37
  38 void
  39 ldemul_hll (char *name)
  40 {
  41   ld_emulation->hll (name);
  42 }
  43
  44 void
  45 ldemul_syslib (char *name)
  46 {
  47   ld_emulation->syslib (name);
  48 }
  49
  50 void
  51 ldemul_after_parse (void)
  52 {
  53   ld_emulation->after_parse ();
  54 }
  55
  56 void
  57 ldemul_before_parse (void)
  58 {
  59   ld_emulation->before_parse ();
  60 }
  61
  62 void
  63 ldemul_after_open (void)
  64 {
  65   ld_emulation->after_open ();
  66 }
  67
  68 void
  69 ldemul_after_allocation (void)
  70 {
  71   ld_emulation->after_allocation ();
  72 }
  73
  74 void
  75 ldemul_before_allocation (void)
  76 {
  77   if (ld_emulation->before_allocation)
  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   if (ld_emulation->finish)
  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 (lang_input_statement_type *file, asection *s)
 125 {
 126   if (ld_emulation->place_orphan)
 127     return (*ld_emulation->place_orphan) (file, 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 }
 215
 216 void
 217 set_output_arch_default (void)
 218 {
 219   /* Set the output architecture and machine if possible.  */
 220   bfd_set_arch_mach (output_bfd,
 221                      ldfile_output_architecture, ldfile_output_machine);
 222 }
 223
 224 void
 225 syslib_default (char *ignore ATTRIBUTE_UNUSED)
 226 {
 227   info_msg (_("%S SYSLIB ignored\n"));
 228 }
 229
 230 void
 231 hll_default (char *ignore ATTRIBUTE_UNUSED)
 232 {
 233   info_msg (_("%S HLL ignored\n"));
 234 }
 235
 236 ld_emulation_xfer_type *ld_emulations[] = { EMULATION_LIST };
 237
 238 void
 239 ldemul_choose_mode (char *target)
 240 {
 241   ld_emulation_xfer_type **eptr = ld_emulations;
 242   /* Ignore "gld" prefix.  */
 243   if (target[0] == 'g' && target[1] == 'l' && target[2] == 'd')
 244     target += 3;
 245   for (; *eptr; eptr++)
 246     {
 247       if (strcmp (target, (*eptr)->emulation_name) == 0)
 248         {
 249           ld_emulation = *eptr;
 250           return;
 251         }
 252     }
 253   einfo (_("%P: unrecognised emulation mode: %s\n"), target);
 254   einfo (_("Supported emulations: "));
 255   ldemul_list_emulations (stderr);
 256   einfo ("%F\n");
 257 }
 258
 259 void
 260 ldemul_list_emulations (FILE *f)
 261 {
 262   ld_emulation_xfer_type **eptr = ld_emulations;
 263   bfd_boolean first = TRUE;
 264
 265   for (; *eptr; eptr++)
 266     {
 267       if (first)
 268         first = FALSE;
 269       else
 270         fprintf (f, " ");
 271       fprintf (f, "%s", (*eptr)->emulation_name);
 272     }
 273 }
 274
 275 void
 276 ldemul_list_emulation_options (FILE *f)
 277 {
 278   ld_emulation_xfer_type **eptr;
 279   int options_found = 0;
 280
 281   for (eptr = ld_emulations; *eptr; eptr++)
 282     {
 283       ld_emulation_xfer_type *emul = *eptr;
 284
 285       if (emul->list_options)
 286         {
 287           fprintf (f, "%s: \n", emul->emulation_name);
 288
 289           emul->list_options (f);
 290
 291           options_found = 1;
 292         }
 293     }
 294
 295   if (! options_found)
 296     fprintf (f, _("  no emulation specific options.\n"));
 297 }
 298
 299 int
 300 ldemul_find_potential_libraries (char *name, lang_input_statement_type *entry)
 301 {
 302   if (ld_emulation->find_potential_libraries)
 303     return ld_emulation->find_potential_libraries (name, entry);
 304
 305   return 0;
 306 }
 307
 308 struct bfd_elf_version_expr *
 309 ldemul_new_vers_pattern (struct bfd_elf_version_expr *entry)
 310 {
 311   if (ld_emulation->new_vers_pattern)
 312     entry = (*ld_emulation->new_vers_pattern) (entry);
 313   return entry;
 314 }