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.
6 This file is part of the GNU Binutils.
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.
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.
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. */
35 #include "ldemul-list.h"
37 static ld_emulation_xfer_type *ld_emulation;
40 ldemul_hll (char *name)
42 ld_emulation->hll (name);
46 ldemul_syslib (char *name)
48 ld_emulation->syslib (name);
52 ldemul_after_parse (void)
54 ld_emulation->after_parse ();
58 ldemul_before_parse (void)
60 ld_emulation->before_parse ();
64 ldemul_after_open (void)
66 ld_emulation->after_open ();
70 ldemul_after_allocation (void)
72 ld_emulation->after_allocation ();
76 ldemul_before_allocation (void)
78 ld_emulation->before_allocation ();
82 ldemul_set_output_arch (void)
84 ld_emulation->set_output_arch ();
90 ld_emulation->finish ();
94 ldemul_set_symbols (void)
96 if (ld_emulation->set_symbols)
97 ld_emulation->set_symbols ();
101 ldemul_create_output_section_statements (void)
103 if (ld_emulation->create_output_section_statements)
104 ld_emulation->create_output_section_statements ();
108 ldemul_get_script (int *isfile)
110 return ld_emulation->get_script (isfile);
114 ldemul_open_dynamic_archive (const char *arch, search_dirs_type *search,
115 lang_input_statement_type *entry)
117 if (ld_emulation->open_dynamic_archive)
118 return (*ld_emulation->open_dynamic_archive) (arch, search, entry);
122 lang_output_section_statement_type *
123 ldemul_place_orphan (asection *s, const char *name, int constraint)
125 if (ld_emulation->place_orphan)
126 return (*ld_emulation->place_orphan) (s, name, constraint);
131 ldemul_add_options (int ns, char **shortopts, int nl,
132 struct option **longopts, int nrl,
133 struct option **really_longopts)
135 if (ld_emulation->add_options)
136 (*ld_emulation->add_options) (ns, shortopts, nl, longopts,
137 nrl, really_longopts);
141 ldemul_handle_option (int optc)
143 if (ld_emulation->handle_option)
144 return (*ld_emulation->handle_option) (optc);
149 ldemul_parse_args (int argc, char **argv)
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);
157 /* Let the emulation code handle an unrecognized file. */
160 ldemul_unrecognized_file (lang_input_statement_type *entry)
162 if (ld_emulation->unrecognized_file)
163 return (*ld_emulation->unrecognized_file) (entry);
167 /* Let the emulation code handle a recognized file. */
170 ldemul_recognized_file (lang_input_statement_type *entry)
172 if (ld_emulation->recognized_file)
173 return (*ld_emulation->recognized_file) (entry);
178 ldemul_choose_target (int argc, char **argv)
180 return ld_emulation->choose_target (argc, argv);
184 /* The default choose_target function. */
187 ldemul_default_target (int argc ATTRIBUTE_UNUSED, char **argv ATTRIBUTE_UNUSED)
189 char *from_outside = getenv (TARGET_ENVIRON);
190 if (from_outside != (char *) NULL)
192 return ld_emulation->target_name;
195 /* If the entry point was not specified as an address, then add the
196 symbol as undefined. This will cause ld to extract an archive
197 element defining the entry if ld is linking against such an archive.
199 We don't do this when generating shared libraries unless given -e
200 on the command line, because most shared libs are not designed to
201 be run as an executable. However, some are, eg. glibc ld.so and
202 may rely on the default linker script supplying ENTRY. So we can't
203 remove the ENTRY from the script, but would rather not insert
204 undefined _start syms. */
207 after_parse_default (void)
209 if (entry_symbol.name != NULL
210 && (link_info.executable || entry_from_cmdline))
212 bfd_boolean is_vma = FALSE;
214 if (entry_from_cmdline)
218 bfd_scan_vma (entry_symbol.name, &send, 0);
219 is_vma = *send == '\0';
222 ldlang_add_undef (entry_symbol.name, entry_from_cmdline);
227 after_open_default (void)
229 struct bfd_link_hash_entry *h;
231 h = bfd_wrapped_link_hash_lookup (link_info.output_bfd,
233 "__ld_compatibility",
236 && (h->type == bfd_link_hash_defined
237 || h->type == bfd_link_hash_defweak))
238 ld_compatibility = h->u.def.value;
242 after_allocation_default (void)
244 lang_relax_sections (FALSE);
248 before_allocation_default (void)
250 if (!link_info.relocatable)
251 strip_excluded_output_sections ();
255 finish_default (void)
257 if (!link_info.relocatable)
258 _bfd_fix_excluded_sec_syms (link_info.output_bfd, &link_info);
262 set_output_arch_default (void)
264 /* Set the output architecture and machine if possible. */
265 bfd_set_arch_mach (link_info.output_bfd,
266 ldfile_output_architecture, ldfile_output_machine);
268 bfd_emul_set_maxpagesize (output_target, config.maxpagesize);
269 bfd_emul_set_commonpagesize (output_target, config.commonpagesize);
273 syslib_default (char *ignore ATTRIBUTE_UNUSED)
275 info_msg (_("%S SYSLIB ignored\n"));
279 hll_default (char *ignore ATTRIBUTE_UNUSED)
281 info_msg (_("%S HLL ignored\n"));
284 ld_emulation_xfer_type *ld_emulations[] = { EMULATION_LIST };
287 ldemul_choose_mode (char *target)
289 ld_emulation_xfer_type **eptr = ld_emulations;
290 /* Ignore "gld" prefix. */
291 if (target[0] == 'g' && target[1] == 'l' && target[2] == 'd')
293 for (; *eptr; eptr++)
295 if (strcmp (target, (*eptr)->emulation_name) == 0)
297 ld_emulation = *eptr;
301 einfo (_("%P: unrecognised emulation mode: %s\n"), target);
302 einfo (_("Supported emulations: "));
303 ldemul_list_emulations (stderr);
308 ldemul_list_emulations (FILE *f)
310 ld_emulation_xfer_type **eptr = ld_emulations;
311 bfd_boolean first = TRUE;
313 for (; *eptr; eptr++)
319 fprintf (f, "%s", (*eptr)->emulation_name);
324 ldemul_list_emulation_options (FILE *f)
326 ld_emulation_xfer_type **eptr;
327 int options_found = 0;
329 for (eptr = ld_emulations; *eptr; eptr++)
331 ld_emulation_xfer_type *emul = *eptr;
333 if (emul->list_options)
335 fprintf (f, "%s: \n", emul->emulation_name);
337 emul->list_options (f);
344 fprintf (f, _(" no emulation specific options.\n"));
348 ldemul_find_potential_libraries (char *name, lang_input_statement_type *entry)
350 if (ld_emulation->find_potential_libraries)
351 return ld_emulation->find_potential_libraries (name, entry);
356 struct bfd_elf_version_expr *
357 ldemul_new_vers_pattern (struct bfd_elf_version_expr *entry)
359 if (ld_emulation->new_vers_pattern)
360 entry = (*ld_emulation->new_vers_pattern) (entry);