| /* ldemul.c -- clearing house for ld emulation states |
| Copyright (C) 1991-2024 Free Software Foundation, Inc. |
| |
| This file is part of the GNU Binutils. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| MA 02110-1301, USA. */ |
| |
| #include "sysdep.h" |
| #include "bfd.h" |
| #include "getopt.h" |
| #include "bfdlink.h" |
| #include "ctf-api.h" |
| |
| #include "ld.h" |
| #include "ldmisc.h" |
| #include "ldexp.h" |
| #include "ldlang.h" |
| #include "ldfile.h" |
| #include "ldemul.h" |
| #include "ldmain.h" |
| #include "ldemul-list.h" |
| |
| static ld_emulation_xfer_type *ld_emulation; |
| |
| void |
| ldemul_hll (char *name) |
| { |
| ld_emulation->hll (name); |
| } |
| |
| void |
| ldemul_syslib (char *name) |
| { |
| ld_emulation->syslib (name); |
| } |
| |
| void |
| ldemul_after_parse (void) |
| { |
| ld_emulation->after_parse (); |
| } |
| |
| void |
| ldemul_before_parse (void) |
| { |
| ld_emulation->before_parse (); |
| } |
| |
| void |
| ldemul_before_plugin_all_symbols_read (void) |
| { |
| if (ld_emulation->before_plugin_all_symbols_read) |
| ld_emulation->before_plugin_all_symbols_read (); |
| } |
| |
| void |
| ldemul_after_open (void) |
| { |
| ld_emulation->after_open (); |
| } |
| |
| void |
| ldemul_after_check_relocs (void) |
| { |
| ld_emulation->after_check_relocs (); |
| } |
| |
| void |
| ldemul_before_place_orphans (void) |
| { |
| ld_emulation->before_place_orphans (); |
| } |
| |
| void |
| ldemul_after_allocation (void) |
| { |
| ld_emulation->after_allocation (); |
| } |
| |
| void |
| ldemul_before_allocation (void) |
| { |
| ld_emulation->before_allocation (); |
| } |
| |
| void |
| ldemul_set_output_arch (void) |
| { |
| ld_emulation->set_output_arch (); |
| } |
| |
| void |
| ldemul_finish (void) |
| { |
| ld_emulation->finish (); |
| } |
| |
| void |
| ldemul_set_symbols (void) |
| { |
| if (ld_emulation->set_symbols) |
| ld_emulation->set_symbols (); |
| } |
| |
| void |
| ldemul_create_output_section_statements (void) |
| { |
| if (ld_emulation->create_output_section_statements) |
| ld_emulation->create_output_section_statements (); |
| } |
| |
| char * |
| ldemul_get_script (int *isfile) |
| { |
| return ld_emulation->get_script (isfile); |
| } |
| |
| bool |
| ldemul_open_dynamic_archive (const char *arch, search_dirs_type *search, |
| lang_input_statement_type *entry) |
| { |
| if (ld_emulation->open_dynamic_archive) |
| return (*ld_emulation->open_dynamic_archive) (arch, search, entry); |
| return false; |
| } |
| |
| lang_output_section_statement_type * |
| ldemul_place_orphan (asection *s, const char *name, int constraint) |
| { |
| if (ld_emulation->place_orphan) |
| return (*ld_emulation->place_orphan) (s, name, constraint); |
| return NULL; |
| } |
| |
| void |
| ldemul_add_options (int ns, char **shortopts, int nl, |
| struct option **longopts, int nrl, |
| struct option **really_longopts) |
| { |
| if (ld_emulation->add_options) |
| (*ld_emulation->add_options) (ns, shortopts, nl, longopts, |
| nrl, really_longopts); |
| } |
| |
| bool |
| ldemul_handle_option (int optc) |
| { |
| if (ld_emulation->handle_option) |
| return (*ld_emulation->handle_option) (optc); |
| return false; |
| } |
| |
| bool |
| ldemul_parse_args (int argc, char **argv) |
| { |
| /* Try and use the emulation parser if there is one. */ |
| if (ld_emulation->parse_args) |
| return (*ld_emulation->parse_args) (argc, argv); |
| return false; |
| } |
| |
| /* Let the emulation code handle an unrecognized file. */ |
| |
| bool |
| ldemul_unrecognized_file (lang_input_statement_type *entry) |
| { |
| if (ld_emulation->unrecognized_file) |
| return (*ld_emulation->unrecognized_file) (entry); |
| return false; |
| } |
| |
| /* Let the emulation code handle a recognized file. */ |
| |
| bool |
| ldemul_recognized_file (lang_input_statement_type *entry) |
| { |
| if (ld_emulation->recognized_file) |
| return (*ld_emulation->recognized_file) (entry); |
| return false; |
| } |
| |
| char * |
| ldemul_choose_target (int argc, char **argv) |
| { |
| return ld_emulation->choose_target (argc, argv); |
| } |
| |
| |
| /* The default choose_target function. */ |
| |
| char * |
| ldemul_default_target (int argc ATTRIBUTE_UNUSED, char **argv ATTRIBUTE_UNUSED) |
| { |
| char *from_outside = getenv (TARGET_ENVIRON); |
| if (from_outside != (char *) NULL) |
| return from_outside; |
| return ld_emulation->target_name; |
| } |
| |
| /* If the entry point was not specified as an address, then add the |
| symbol as undefined. This will cause ld to extract an archive |
| element defining the entry if ld is linking against such an archive. |
| |
| We don't do this when generating shared libraries unless given -e |
| on the command line, because most shared libs are not designed to |
| be run as an executable. However, some are, eg. glibc ld.so and |
| may rely on the default linker script supplying ENTRY. So we can't |
| remove the ENTRY from the script, but would rather not insert |
| undefined _start syms. */ |
| |
| void |
| after_parse_default (void) |
| { |
| if (entry_symbol.name != NULL |
| && (bfd_link_executable (&link_info) || entry_from_cmdline)) |
| { |
| bool is_vma = false; |
| |
| if (entry_from_cmdline) |
| { |
| const char *send; |
| |
| bfd_scan_vma (entry_symbol.name, &send, 0); |
| is_vma = *send == '\0'; |
| } |
| if (!is_vma) |
| ldlang_add_undef (entry_symbol.name, entry_from_cmdline); |
| } |
| if (link_info.maxpagesize == 0) |
| link_info.maxpagesize = bfd_emul_get_maxpagesize (default_target); |
| if (link_info.commonpagesize == 0) |
| link_info.commonpagesize = bfd_emul_get_commonpagesize (default_target); |
| } |
| |
| void |
| after_open_default (void) |
| { |
| link_info.big_endian = true; |
| |
| if (bfd_big_endian (link_info.output_bfd)) |
| ; |
| else if (bfd_little_endian (link_info.output_bfd)) |
| link_info.big_endian = false; |
| else |
| { |
| if (command_line.endian == ENDIAN_BIG) |
| ; |
| else if (command_line.endian == ENDIAN_LITTLE) |
| link_info.big_endian = false; |
| else if (command_line.endian == ENDIAN_UNSET) |
| { |
| LANG_FOR_EACH_INPUT_STATEMENT (s) |
| if (s->the_bfd != NULL) |
| { |
| if (bfd_little_endian (s->the_bfd)) |
| link_info.big_endian = false; |
| break; |
| } |
| } |
| } |
| } |
| |
| void |
| after_check_relocs_default (void) |
| { |
| } |
| |
| void |
| before_place_orphans_default (void) |
| { |
| } |
| |
| void |
| after_allocation_default (void) |
| { |
| lang_relax_sections (false); |
| } |
| |
| void |
| before_allocation_default (void) |
| { |
| if (!bfd_link_relocatable (&link_info)) |
| strip_excluded_output_sections (); |
| } |
| |
| void |
| finish_default (void) |
| { |
| if (!bfd_link_relocatable (&link_info)) |
| _bfd_fix_excluded_sec_syms (link_info.output_bfd, &link_info); |
| } |
| |
| void |
| set_output_arch_default (void) |
| { |
| /* Set the output architecture and machine if possible. */ |
| bfd_set_arch_mach (link_info.output_bfd, |
| ldfile_output_architecture, ldfile_output_machine); |
| } |
| |
| void |
| syslib_default (char *ignore ATTRIBUTE_UNUSED) |
| { |
| info_msg (_("%pS SYSLIB ignored\n"), NULL); |
| } |
| |
| void |
| hll_default (char *ignore ATTRIBUTE_UNUSED) |
| { |
| info_msg (_("%pS HLL ignored\n"), NULL); |
| } |
| |
| ld_emulation_xfer_type *ld_emulations[] = { EMULATION_LIST }; |
| |
| void |
| ldemul_choose_mode (char *target) |
| { |
| ld_emulation_xfer_type **eptr = ld_emulations; |
| /* Ignore "gld" prefix. */ |
| if (target[0] == 'g' && target[1] == 'l' && target[2] == 'd') |
| target += 3; |
| for (; *eptr; eptr++) |
| { |
| if (strcmp (target, (*eptr)->emulation_name) == 0) |
| { |
| ld_emulation = *eptr; |
| return; |
| } |
| } |
| einfo (_("%P: unrecognised emulation mode: %s\n"), target); |
| einfo (_("Supported emulations: ")); |
| ldemul_list_emulations (stderr); |
| einfo ("%F\n"); |
| } |
| |
| void |
| ldemul_list_emulations (FILE *f) |
| { |
| ld_emulation_xfer_type **eptr = ld_emulations; |
| bool first = true; |
| |
| for (; *eptr; eptr++) |
| { |
| if (first) |
| first = false; |
| else |
| fprintf (f, " "); |
| fprintf (f, "%s", (*eptr)->emulation_name); |
| } |
| } |
| |
| void |
| ldemul_list_emulation_options (FILE *f) |
| { |
| ld_emulation_xfer_type **eptr; |
| int options_found = 0; |
| |
| for (eptr = ld_emulations; *eptr; eptr++) |
| { |
| ld_emulation_xfer_type *emul = *eptr; |
| |
| if (emul->list_options) |
| { |
| fprintf (f, "%s: \n", emul->emulation_name); |
| |
| emul->list_options (f); |
| |
| options_found = 1; |
| } |
| } |
| |
| if (!options_found) |
| fprintf (f, _(" no emulation specific options.\n")); |
| } |
| |
| int |
| ldemul_find_potential_libraries (char *name, lang_input_statement_type *entry) |
| { |
| if (ld_emulation->find_potential_libraries) |
| return ld_emulation->find_potential_libraries (name, entry); |
| |
| return 0; |
| } |
| |
| struct bfd_elf_version_expr * |
| ldemul_new_vers_pattern (struct bfd_elf_version_expr *entry) |
| { |
| if (ld_emulation->new_vers_pattern) |
| entry = (*ld_emulation->new_vers_pattern) (entry); |
| return entry; |
| } |
| |
| void |
| ldemul_extra_map_file_text (bfd *abfd, struct bfd_link_info *info, FILE *mapf) |
| { |
| if (ld_emulation->extra_map_file_text) |
| ld_emulation->extra_map_file_text (abfd, info, mapf); |
| } |
| |
| int |
| ldemul_emit_ctf_early (void) |
| { |
| if (ld_emulation->emit_ctf_early) |
| return ld_emulation->emit_ctf_early (); |
| /* If the emulation doesn't know if it wants to emit CTF early, it is going |
| to do so. */ |
| return 1; |
| } |
| |
| void |
| ldemul_acquire_strings_for_ctf (struct ctf_dict *ctf_output, |
| struct elf_strtab_hash *symstrtab) |
| { |
| if (ld_emulation->acquire_strings_for_ctf) |
| ld_emulation->acquire_strings_for_ctf (ctf_output, symstrtab); |
| } |
| |
| void |
| ldemul_new_dynsym_for_ctf (struct ctf_dict *ctf_output, int symidx, |
| struct elf_internal_sym *sym) |
| { |
| if (ld_emulation->new_dynsym_for_ctf) |
| ld_emulation->new_dynsym_for_ctf (ctf_output, symidx, sym); |
| } |
| |
| bool |
| ldemul_print_symbol (struct bfd_link_hash_entry *hash_entry, void *ptr) |
| { |
| if (ld_emulation->print_symbol) |
| return ld_emulation->print_symbol (hash_entry, ptr); |
| return print_one_symbol (hash_entry, ptr); |
| } |