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4a6afc88bb
more efficient backend code can be written for specific object files. * lderror.c, lderror.h, ldindr.c, ldindr.h, ldsym.c, ldsym.h, ldwarn.c, ldwarn.h, relax.c, relax.h: Removed. * ldctor.c, ldctor.h: Complete rewrite. * ldwrite.c, ldwrite.h: Complete rewrite. * ld.h (strip_symbols_type, strip_symbols): Removed. Use link_info.strip instead. Changed all uses. (discard_locals_type, discard_locals): Removed. Use link_info.discard instead. Changed all uses. (ld_config_type): Removed relocateable_output field; use link_info.relocateable instead; changed all uses. Added stats field. (set_asymbol_chain, get_asymbol_chain, get_loader_symbol, set_loader_symbol): Removed. * ldexp.h (node_class): Added etree_rel. (etree_type): Added rel field. * ldexp.c (exp_print_token): Bracketed table initialization. (exp_relop): New function. (fold_name): Use linker hash table rather than ldsym functions. (exp_fold_tree): Likewise. Also, handle etree_rel case. (exp_print_tree): Handle etree_rel. * ldgram.y (strip_symbols, discard_locals): Removed. (OPTION_stats, OPTION_no_keep_memory): New tokens. Handle them. (REL): New token. Does not appear in grammar, but needed for expression code. (file): Don't call lang_final; it's called by main anyhow. * ldlex.l: Accept -stats and -no-keep-memory options. * ldlang.h (fill_type): Make unsigned int, not unsigned short. * ldlang.c: Consistently use fill_type for fill argument. (lang_init_script_file, script_file): Removed. (create_object_symbols): Removed. Use link_info.create_object_symbols_section instead. Changed all uses. (lang_add_keepsyms_file): Removed. (lookup_name): Call bfd_link_add_symbols instead of ldmain_open_file_read_symbol. (wild): Don't iterate over script_file. (open_output): Create link hash table. (lang_place_undefineds): Rewrote. (lang_size_sections): Handle relaxing (doesn't work yet). (lang_relocate_globals): Removed. (lang_finish): Use link hash table rather than ldsym functions. (lang_common): Rewrote. (lang_one_common): New function. (ldlang_add_file): Add file to link_info.input_bfds list. Set usrdata. (create_symbol): Removed. (lang_process): Don't call lang_init_script_file. Call ldctor_build_sets rather than find_constructors. Don't call lang_relocate_globals. (lang_abs_symbol_at_beginning_of): Rewrote. (lang_abs_symbol_at_end_of): Rewrote. * ldmain.c (had_y): Removed. (lprefix, lprefix_len): Removed; use link_info fields instead. Changed all uses. (multiple_def_count, commons_pending, undefined_global_sym_count, total_symbols_seen, total_files_seen): Removed. (link_callbacks, link_info): New variables. (main): Initialize link_info. Don't call init_bfd_error_vector or ldsym_init. Don't set now unused variables. Handle -stats. (get_emulation): Removed obsolete and nonfunctional GNU960 code. (add_ysym): Rewrote. (read_entry_symbols, refize, enter_global_ref, enter_file_symbols, search_library, gnu960_check_format, decode_library_subfile, linear_library, symdef_library, clear_syms, subfile_wanted_p): Removed. (add_keepsyms_file, add_archive_element, multiple_definition, multiple_common, add_to_set, warning_callback, undefined_symbol, reloc_overflow, reloc_dangerous, unattached_reloc, notice_ysym): New functions. * ldmisc.c (vfinfo): Accept a string for %T, not a symbol. Don't require symbols for %C; look them up instead. * emultempl/hppaosf.em: Pass link_info to hppa_look_for_stubs_in_section. * Makefile.in: Rebuilt dependencies. (CFILES): Removed lderror.c, ldindr.c, ldsym.c, ldwarn.c, and relax.c. (HFILES): Removed lderror.h, ldindr.h, ldsym.h, ldwarn.h, and relax.h. (EMULATION_OFILES): Depend on bfdlink.h, ldmain.h, ldexp.h, ldlang.h and ldctor.h. * Makefile.in (ldlex.c): Don't depend on ldgram.h. Remove declarations of free and malloc from flex output. Change malloc to ldmalloc in flex output.
289 lines
7.3 KiB
C
289 lines
7.3 KiB
C
/* ldwrite.c -- write out the linked file
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Copyright (C) 1993 Free Software Foundation, Inc.
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Written by Steve Chamberlain sac@cygnus.com
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This file is part of GLD, the Gnu Linker.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "bfd.h"
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#include "sysdep.h"
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#include "bfdlink.h"
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#include "ld.h"
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#include "ldexp.h"
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#include "ldlang.h"
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#include "ldwrite.h"
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#include "ldmisc.h"
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#include "ldgram.h"
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#include "ldmain.h"
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static void build_link_order PARAMS ((lang_statement_union_type *));
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static void print_symbol_table PARAMS ((void));
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static void print_file_stuff PARAMS ((lang_input_statement_type *));
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static boolean print_symbol PARAMS ((struct bfd_link_hash_entry *, PTR));
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/* Build link_order structures for the BFD linker. */
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static void
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build_link_order (statement)
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lang_statement_union_type *statement;
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{
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switch (statement->header.type)
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{
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case lang_data_statement_enum:
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/* FIXME: This should probably build a link_order, but instead
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it just does the output directly. */
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{
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bfd_vma value = statement->data_statement.value;
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bfd_byte play_area[LONG_SIZE];
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unsigned int size = 0;
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asection *output_section = statement->data_statement.output_section;
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ASSERT (output_section->owner == output_bfd);
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switch (statement->data_statement.type)
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{
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case LONG:
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bfd_put_32 (output_bfd, value, play_area);
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size = LONG_SIZE;
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break;
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case SHORT:
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bfd_put_16 (output_bfd, value, play_area);
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size = SHORT_SIZE;
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break;
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case BYTE:
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bfd_put_8 (output_bfd, value, play_area);
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size = BYTE_SIZE;
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break;
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default:
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abort ();
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}
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if (! bfd_set_section_contents (output_bfd, output_section,
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play_area,
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statement->data_statement.output_vma,
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size))
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einfo ("%P%X: writing data failed: %E\n");
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}
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break;
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case lang_input_section_enum:
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/* Create a new link_order in the output section with this
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attached */
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if (statement->input_section.ifile->just_syms_flag == false)
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{
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asection *i = statement->input_section.section;
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asection *output_section = i->output_section;
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ASSERT (output_section->owner == output_bfd);
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if ((output_section->flags & SEC_HAS_CONTENTS) != 0)
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{
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struct bfd_link_order *link_order;
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link_order = bfd_new_link_order (output_bfd, output_section);
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if (i->flags & SEC_NEVER_LOAD)
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{
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/* We've got a never load section inside one which
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is going to be output, we'll change it into a
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fill link_order */
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link_order->type = bfd_fill_link_order;
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link_order->u.fill.value = 0;
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}
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else
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{
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link_order->type = bfd_indirect_link_order;
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link_order->u.indirect.section = i;
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ASSERT (i->output_section == output_section);
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}
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link_order->size = bfd_section_size (i->owner, i);
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link_order->offset = i->output_offset;
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}
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}
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break;
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case lang_padding_statement_enum:
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/* Make a new link_order with the right filler */
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{
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asection *output_section;
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struct bfd_link_order *link_order;
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output_section = statement->padding_statement.output_section;
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ASSERT (statement->padding_statement.output_section->owner
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== output_bfd);
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if ((output_section->flags & SEC_HAS_CONTENTS) != 0)
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{
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link_order = bfd_new_link_order (output_bfd, output_section);
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link_order->type = bfd_fill_link_order;
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link_order->size = statement->padding_statement.size;
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link_order->offset = statement->padding_statement.output_offset;
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link_order->u.fill.value = statement->padding_statement.fill;
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}
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}
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break;
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default:
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/* All the other ones fall through */
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break;
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}
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}
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/* Call BFD to write out the linked file. */
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void
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ldwrite ()
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{
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lang_for_each_statement (build_link_order);
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if (! bfd_final_link (output_bfd, &link_info))
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einfo ("%F%P: %B: %E\n", output_bfd);
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if (config.map_file)
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{
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print_symbol_table ();
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lang_map ();
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}
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}
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/* Print the symbol table. */
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static void
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print_symbol_table ()
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{
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fprintf (config.map_file, "**FILES**\n\n");
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lang_for_each_file (print_file_stuff);
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fprintf (config.map_file, "**GLOBAL SYMBOLS**\n\n");
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fprintf (config.map_file, "offset section offset symbol\n");
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bfd_link_hash_traverse (link_info.hash, print_symbol, (PTR) NULL);
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}
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/* Print information about a file. */
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static void
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print_file_stuff (f)
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lang_input_statement_type * f;
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{
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fprintf (config.map_file, " %s\n", f->filename);
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if (f->just_syms_flag)
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{
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fprintf (config.map_file, " symbols only\n");
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}
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else
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{
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asection *s;
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if (true)
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{
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for (s = f->the_bfd->sections;
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s != (asection *) NULL;
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s = s->next)
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{
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print_address (s->output_offset);
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if (s->reloc_done)
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{
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fprintf (config.map_file, " %08x 2**%2ud %s\n",
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(unsigned) bfd_get_section_size_after_reloc (s),
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s->alignment_power, s->name);
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}
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else
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{
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fprintf (config.map_file, " %08x 2**%2ud %s\n",
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(unsigned) bfd_get_section_size_before_reloc (s),
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s->alignment_power, s->name);
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}
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}
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}
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else
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{
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for (s = f->the_bfd->sections;
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s != (asection *) NULL;
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s = s->next)
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{
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fprintf (config.map_file, "%s ", s->name);
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print_address (s->output_offset);
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fprintf (config.map_file, "(%x)",
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(unsigned) bfd_get_section_size_after_reloc (s));
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}
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fprintf (config.map_file, "hex \n");
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}
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}
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print_nl ();
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}
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/* Print a symbol. */
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static boolean
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print_symbol (p, ignore)
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struct bfd_link_hash_entry *p;
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PTR ignore;
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{
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while (p->type == bfd_link_hash_indirect
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|| p->type == bfd_link_hash_warning)
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p = p->u.i.link;
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switch (p->type)
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{
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case bfd_link_hash_new:
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abort ();
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case bfd_link_hash_undefined:
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fprintf (config.map_file, "undefined ");
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fprintf (config.map_file, "%s ", p->root.string);
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print_nl ();
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break;
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case bfd_link_hash_weak:
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fprintf (config.map_file, "weak ");
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fprintf (config.map_file, "%s ", p->root.string);
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print_nl ();
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break;
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case bfd_link_hash_defined:
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{
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asection *defsec = p->u.def.section;
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print_address (p->u.def.value);
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if (defsec)
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{
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fprintf (config.map_file, " %-10s",
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bfd_section_name (output_bfd, defsec));
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print_space ();
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print_address (p->u.def.value + defsec->vma);
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}
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else
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{
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fprintf (config.map_file, " .......");
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}
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fprintf (config.map_file, " %s ", p->root.string);
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}
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print_nl ();
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break;
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case bfd_link_hash_common:
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fprintf (config.map_file, "common ");
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print_address (p->u.c.size);
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fprintf (config.map_file, " %s ", p->root.string);
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print_nl ();
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break;
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default:
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abort ();
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}
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return true;
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}
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