1 /* ldemul.c -- clearing house for ld emulation states
2 Copyright (C) 1991-2015 Free Software Foundation, Inc.
4 This file is part of the GNU Binutils.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
33 #include "ldemul-list.h"
35 static ld_emulation_xfer_type *ld_emulation;
38 ldemul_hll (char *name)
40 ld_emulation->hll (name);
44 ldemul_syslib (char *name)
46 ld_emulation->syslib (name);
50 ldemul_after_parse (void)
52 ld_emulation->after_parse ();
56 ldemul_before_parse (void)
58 ld_emulation->before_parse ();
62 ldemul_after_open (void)
64 ld_emulation->after_open ();
68 ldemul_after_allocation (void)
70 ld_emulation->after_allocation ();
74 ldemul_before_allocation (void)
76 ld_emulation->before_allocation ();
80 ldemul_set_output_arch (void)
82 ld_emulation->set_output_arch ();
88 ld_emulation->finish ();
92 ldemul_set_symbols (void)
94 if (ld_emulation->set_symbols)
95 ld_emulation->set_symbols ();
99 ldemul_create_output_section_statements (void)
101 if (ld_emulation->create_output_section_statements)
102 ld_emulation->create_output_section_statements ();
106 ldemul_get_script (int *isfile)
108 return ld_emulation->get_script (isfile);
112 ldemul_open_dynamic_archive (const char *arch, search_dirs_type *search,
113 lang_input_statement_type *entry)
115 if (ld_emulation->open_dynamic_archive)
116 return (*ld_emulation->open_dynamic_archive) (arch, search, entry);
120 lang_output_section_statement_type *
121 ldemul_place_orphan (asection *s, const char *name, int constraint)
123 if (ld_emulation->place_orphan)
124 return (*ld_emulation->place_orphan) (s, name, constraint);
129 ldemul_add_options (int ns, char **shortopts, int nl,
130 struct option **longopts, int nrl,
131 struct option **really_longopts)
133 if (ld_emulation->add_options)
134 (*ld_emulation->add_options) (ns, shortopts, nl, longopts,
135 nrl, really_longopts);
139 ldemul_handle_option (int optc)
141 if (ld_emulation->handle_option)
142 return (*ld_emulation->handle_option) (optc);
147 ldemul_parse_args (int argc, char **argv)
149 /* Try and use the emulation parser if there is one. */
150 if (ld_emulation->parse_args)
151 return (*ld_emulation->parse_args) (argc, argv);
155 /* Let the emulation code handle an unrecognized file. */
158 ldemul_unrecognized_file (lang_input_statement_type *entry)
160 if (ld_emulation->unrecognized_file)
161 return (*ld_emulation->unrecognized_file) (entry);
165 /* Let the emulation code handle a recognized file. */
168 ldemul_recognized_file (lang_input_statement_type *entry)
170 if (ld_emulation->recognized_file)
171 return (*ld_emulation->recognized_file) (entry);
176 ldemul_choose_target (int argc, char **argv)
178 return ld_emulation->choose_target (argc, argv);
182 /* The default choose_target function. */
185 ldemul_default_target (int argc ATTRIBUTE_UNUSED, char **argv ATTRIBUTE_UNUSED)
187 char *from_outside = getenv (TARGET_ENVIRON);
188 if (from_outside != (char *) NULL)
190 return ld_emulation->target_name;
193 /* If the entry point was not specified as an address, then add the
194 symbol as undefined. This will cause ld to extract an archive
195 element defining the entry if ld is linking against such an archive.
197 We don't do this when generating shared libraries unless given -e
198 on the command line, because most shared libs are not designed to
199 be run as an executable. However, some are, eg. glibc ld.so and
200 may rely on the default linker script supplying ENTRY. So we can't
201 remove the ENTRY from the script, but would rather not insert
202 undefined _start syms. */
205 after_parse_default (void)
207 if (entry_symbol.name != NULL
208 && (link_info.executable || entry_from_cmdline))
210 bfd_boolean is_vma = FALSE;
212 if (entry_from_cmdline)
216 bfd_scan_vma (entry_symbol.name, &send, 0);
217 is_vma = *send == '\0';
220 ldlang_add_undef (entry_symbol.name, entry_from_cmdline);
225 after_open_default (void)
230 after_allocation_default (void)
232 lang_relax_sections (FALSE);
236 before_allocation_default (void)
238 if (!link_info.relocatable)
239 strip_excluded_output_sections ();
243 finish_default (void)
245 if (!link_info.relocatable)
246 _bfd_fix_excluded_sec_syms (link_info.output_bfd, &link_info);
250 set_output_arch_default (void)
252 /* Set the output architecture and machine if possible. */
253 bfd_set_arch_mach (link_info.output_bfd,
254 ldfile_output_architecture, ldfile_output_machine);
256 bfd_emul_set_maxpagesize (output_target, config.maxpagesize);
257 bfd_emul_set_commonpagesize (output_target, config.commonpagesize);
261 syslib_default (char *ignore ATTRIBUTE_UNUSED)
263 info_msg (_("%S SYSLIB ignored\n"), NULL);
267 hll_default (char *ignore ATTRIBUTE_UNUSED)
269 info_msg (_("%S HLL ignored\n"), NULL);
272 ld_emulation_xfer_type *ld_emulations[] = { EMULATION_LIST };
275 ldemul_choose_mode (char *target)
277 ld_emulation_xfer_type **eptr = ld_emulations;
278 /* Ignore "gld" prefix. */
279 if (target[0] == 'g' && target[1] == 'l' && target[2] == 'd')
281 for (; *eptr; eptr++)
283 if (strcmp (target, (*eptr)->emulation_name) == 0)
285 ld_emulation = *eptr;
289 einfo (_("%P: unrecognised emulation mode: %s\n"), target);
290 einfo (_("Supported emulations: "));
291 ldemul_list_emulations (stderr);
296 ldemul_list_emulations (FILE *f)
298 ld_emulation_xfer_type **eptr = ld_emulations;
299 bfd_boolean first = TRUE;
301 for (; *eptr; eptr++)
307 fprintf (f, "%s", (*eptr)->emulation_name);
312 ldemul_list_emulation_options (FILE *f)
314 ld_emulation_xfer_type **eptr;
315 int options_found = 0;
317 for (eptr = ld_emulations; *eptr; eptr++)
319 ld_emulation_xfer_type *emul = *eptr;
321 if (emul->list_options)
323 fprintf (f, "%s: \n", emul->emulation_name);
325 emul->list_options (f);
332 fprintf (f, _(" no emulation specific options.\n"));
336 ldemul_find_potential_libraries (char *name, lang_input_statement_type *entry)
338 if (ld_emulation->find_potential_libraries)
339 return ld_emulation->find_potential_libraries (name, entry);
344 struct bfd_elf_version_expr *
345 ldemul_new_vers_pattern (struct bfd_elf_version_expr *entry)
347 if (ld_emulation->new_vers_pattern)
348 entry = (*ld_emulation->new_vers_pattern) (entry);
353 ldemul_extra_map_file_text (bfd *abfd, struct bfd_link_info *info, FILE *mapf)
355 if (ld_emulation->extra_map_file_text)
356 ld_emulation->extra_map_file_text (abfd, info, mapf);