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[/] [open8_urisc/] [trunk/] [gnu/] [binutils/] [ld/] [ldemul.c] - Rev 161
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/* ldemul.c -- clearing house for ld emulation states Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2005, 2007, 2008, 2009, 2010, 2011 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 "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_after_open (void) { ld_emulation->after_open (); } 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); } bfd_boolean 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); } bfd_boolean ldemul_handle_option (int optc) { if (ld_emulation->handle_option) return (*ld_emulation->handle_option) (optc); return FALSE; } bfd_boolean 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. */ bfd_boolean 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. */ bfd_boolean 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 && (link_info.executable || entry_from_cmdline)) { bfd_boolean 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); } } void after_open_default (void) { } void after_allocation_default (void) { lang_relax_sections (FALSE); } void before_allocation_default (void) { if (!link_info.relocatable) strip_excluded_output_sections (); } void finish_default (void) { if (!link_info.relocatable) _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); bfd_emul_set_maxpagesize (output_target, config.maxpagesize); bfd_emul_set_commonpagesize (output_target, config.commonpagesize); } void syslib_default (char *ignore ATTRIBUTE_UNUSED) { info_msg (_("%S SYSLIB ignored\n")); } void hll_default (char *ignore ATTRIBUTE_UNUSED) { info_msg (_("%S HLL ignored\n")); } 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; bfd_boolean 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; }
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