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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-7.2/] [bfd/] [simple.c] - Rev 438
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/* simple.c -- BFD simple client routines Copyright 2002, 2003, 2004, 2005, 2007, 2008, 2009 Free Software Foundation, Inc. Contributed by MontaVista Software, Inc. This file is part of BFD, the Binary File Descriptor library. 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 "libbfd.h" #include "bfdlink.h" static bfd_boolean simple_dummy_warning (struct bfd_link_info *link_info ATTRIBUTE_UNUSED, const char *warning ATTRIBUTE_UNUSED, const char *symbol ATTRIBUTE_UNUSED, bfd *abfd ATTRIBUTE_UNUSED, asection *section ATTRIBUTE_UNUSED, bfd_vma address ATTRIBUTE_UNUSED) { return TRUE; } static bfd_boolean simple_dummy_undefined_symbol (struct bfd_link_info *link_info ATTRIBUTE_UNUSED, const char *name ATTRIBUTE_UNUSED, bfd *abfd ATTRIBUTE_UNUSED, asection *section ATTRIBUTE_UNUSED, bfd_vma address ATTRIBUTE_UNUSED, bfd_boolean fatal ATTRIBUTE_UNUSED) { return TRUE; } static bfd_boolean simple_dummy_reloc_overflow (struct bfd_link_info *link_info ATTRIBUTE_UNUSED, struct bfd_link_hash_entry *entry ATTRIBUTE_UNUSED, const char *name ATTRIBUTE_UNUSED, const char *reloc_name ATTRIBUTE_UNUSED, bfd_vma addend ATTRIBUTE_UNUSED, bfd *abfd ATTRIBUTE_UNUSED, asection *section ATTRIBUTE_UNUSED, bfd_vma address ATTRIBUTE_UNUSED) { return TRUE; } static bfd_boolean simple_dummy_reloc_dangerous (struct bfd_link_info *link_info ATTRIBUTE_UNUSED, const char *message ATTRIBUTE_UNUSED, bfd *abfd ATTRIBUTE_UNUSED, asection *section ATTRIBUTE_UNUSED, bfd_vma address ATTRIBUTE_UNUSED) { return TRUE; } static bfd_boolean simple_dummy_unattached_reloc (struct bfd_link_info *link_info ATTRIBUTE_UNUSED, const char *name ATTRIBUTE_UNUSED, bfd *abfd ATTRIBUTE_UNUSED, asection *section ATTRIBUTE_UNUSED, bfd_vma address ATTRIBUTE_UNUSED) { return TRUE; } static bfd_boolean simple_dummy_multiple_definition (struct bfd_link_info *link_info ATTRIBUTE_UNUSED, const char *name ATTRIBUTE_UNUSED, bfd *obfd ATTRIBUTE_UNUSED, asection *osec ATTRIBUTE_UNUSED, bfd_vma oval ATTRIBUTE_UNUSED, bfd *nbfd ATTRIBUTE_UNUSED, asection *nsec ATTRIBUTE_UNUSED, bfd_vma nval ATTRIBUTE_UNUSED) { return TRUE; } static void simple_dummy_einfo (const char *fmt ATTRIBUTE_UNUSED, ...) { } struct saved_output_info { bfd_vma offset; asection *section; }; static void simple_save_output_info (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr) { struct saved_output_info *output_info = (struct saved_output_info *) ptr; output_info[section->index].offset = section->output_offset; output_info[section->index].section = section->output_section; if ((section->flags & SEC_DEBUGGING) != 0 || section->output_section == NULL) { section->output_offset = 0; section->output_section = section; } } static void simple_restore_output_info (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr) { struct saved_output_info *output_info = (struct saved_output_info *) ptr; section->output_offset = output_info[section->index].offset; section->output_section = output_info[section->index].section; } /* FUNCTION bfd_simple_relocate_secton SYNOPSIS bfd_byte *bfd_simple_get_relocated_section_contents (bfd *abfd, asection *sec, bfd_byte *outbuf, asymbol **symbol_table); DESCRIPTION Returns the relocated contents of section @var{sec}. The symbols in @var{symbol_table} will be used, or the symbols from @var{abfd} if @var{symbol_table} is NULL. The output offsets for debug sections will be temporarily reset to 0. The result will be stored at @var{outbuf} or allocated with @code{bfd_malloc} if @var{outbuf} is @code{NULL}. Returns @code{NULL} on a fatal error; ignores errors applying particular relocations. */ bfd_byte * bfd_simple_get_relocated_section_contents (bfd *abfd, asection *sec, bfd_byte *outbuf, asymbol **symbol_table) { struct bfd_link_info link_info; struct bfd_link_order link_order; struct bfd_link_callbacks callbacks; bfd_byte *contents, *data; int storage_needed; void *saved_offsets; /* Don't apply relocation on executable and shared library. See PR 4756. */ if ((abfd->flags & (HAS_RELOC | EXEC_P | DYNAMIC)) != HAS_RELOC || ! (sec->flags & SEC_RELOC)) { bfd_size_type amt = sec->rawsize > sec->size ? sec->rawsize : sec->size; bfd_size_type size = sec->rawsize ? sec->rawsize : sec->size; if (outbuf == NULL) contents = (bfd_byte *) bfd_malloc (amt); else contents = outbuf; if (contents) bfd_get_section_contents (abfd, sec, contents, 0, size); return contents; } /* In order to use bfd_get_relocated_section_contents, we need to forge some data structures that it expects. */ /* Fill in the bare minimum number of fields for our purposes. */ memset (&link_info, 0, sizeof (link_info)); link_info.output_bfd = abfd; link_info.input_bfds = abfd; link_info.input_bfds_tail = &abfd->link_next; link_info.hash = _bfd_generic_link_hash_table_create (abfd); link_info.callbacks = &callbacks; callbacks.warning = simple_dummy_warning; callbacks.undefined_symbol = simple_dummy_undefined_symbol; callbacks.reloc_overflow = simple_dummy_reloc_overflow; callbacks.reloc_dangerous = simple_dummy_reloc_dangerous; callbacks.unattached_reloc = simple_dummy_unattached_reloc; callbacks.multiple_definition = simple_dummy_multiple_definition; callbacks.einfo = simple_dummy_einfo; memset (&link_order, 0, sizeof (link_order)); link_order.next = NULL; link_order.type = bfd_indirect_link_order; link_order.offset = 0; link_order.size = sec->size; link_order.u.indirect.section = sec; data = NULL; if (outbuf == NULL) { bfd_size_type amt = sec->rawsize > sec->size ? sec->rawsize : sec->size; data = (bfd_byte *) bfd_malloc (amt); if (data == NULL) return NULL; outbuf = data; } /* The sections in ABFD may already have output sections and offsets set. Because this function is primarily for debug sections, and GCC uses the knowledge that debug sections will generally have VMA 0 when emitting relocations between DWARF-2 sections (which are supposed to be section-relative offsets anyway), we need to reset the output offsets to zero. We also need to arrange for section->output_section->vma plus section->output_offset to equal section->vma, which we do by setting section->output_section to point back to section. Save the original output offset and output section to restore later. */ saved_offsets = malloc (sizeof (struct saved_output_info) * abfd->section_count); if (saved_offsets == NULL) { if (data) free (data); return NULL; } bfd_map_over_sections (abfd, simple_save_output_info, saved_offsets); if (symbol_table == NULL) { _bfd_generic_link_add_symbols (abfd, &link_info); storage_needed = bfd_get_symtab_upper_bound (abfd); symbol_table = (asymbol **) bfd_malloc (storage_needed); bfd_canonicalize_symtab (abfd, symbol_table); } else storage_needed = 0; contents = bfd_get_relocated_section_contents (abfd, &link_info, &link_order, outbuf, 0, symbol_table); if (contents == NULL && data != NULL) free (data); bfd_map_over_sections (abfd, simple_restore_output_info, saved_offsets); free (saved_offsets); _bfd_generic_link_hash_table_free (link_info.hash); return contents; }
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