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213 lines
6.7 KiB
C
213 lines
6.7 KiB
C
/* simple.c -- BFD simple client routines
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Copyright 2002
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Free Software Foundation, Inc.
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Contributed by MontaVista Software, Inc.
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This file is part of BFD, the Binary File Descriptor library.
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "bfd.h"
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#include "sysdep.h"
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#include "libbfd.h"
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#include "bfdlink.h"
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static bfd_boolean simple_dummy_warning
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PARAMS ((struct bfd_link_info *, const char *, const char *, bfd *,
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asection *, bfd_vma));
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static bfd_boolean simple_dummy_undefined_symbol
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PARAMS ((struct bfd_link_info *, const char *, bfd *, asection *,
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bfd_vma, bfd_boolean));
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static bfd_boolean simple_dummy_reloc_overflow
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PARAMS ((struct bfd_link_info *, const char *, const char *, bfd_vma,
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bfd *, asection *, bfd_vma));
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static bfd_boolean simple_dummy_reloc_dangerous
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PARAMS ((struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma));
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static bfd_boolean simple_dummy_unattached_reloc
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PARAMS ((struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma));
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bfd_byte * bfd_simple_get_relocated_section_contents
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PARAMS ((bfd *, asection *, bfd_byte *));
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static bfd_boolean
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simple_dummy_warning (link_info, warning, symbol, abfd, section, address)
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struct bfd_link_info *link_info ATTRIBUTE_UNUSED;
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const char *warning ATTRIBUTE_UNUSED;
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const char *symbol ATTRIBUTE_UNUSED;
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bfd *abfd ATTRIBUTE_UNUSED;
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asection *section ATTRIBUTE_UNUSED;
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bfd_vma address ATTRIBUTE_UNUSED;
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{
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return TRUE;
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}
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static bfd_boolean
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simple_dummy_undefined_symbol (link_info, name, abfd, section, address, fatal)
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struct bfd_link_info *link_info ATTRIBUTE_UNUSED;
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const char *name ATTRIBUTE_UNUSED;
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bfd *abfd ATTRIBUTE_UNUSED;
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asection *section ATTRIBUTE_UNUSED;
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bfd_vma address ATTRIBUTE_UNUSED;
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bfd_boolean fatal ATTRIBUTE_UNUSED;
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{
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return TRUE;
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}
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static bfd_boolean
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simple_dummy_reloc_overflow (link_info, name, reloc_name, addend, abfd,
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section, address)
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struct bfd_link_info *link_info ATTRIBUTE_UNUSED;
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const char *name ATTRIBUTE_UNUSED;
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const char *reloc_name ATTRIBUTE_UNUSED;
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bfd_vma addend ATTRIBUTE_UNUSED;
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bfd *abfd ATTRIBUTE_UNUSED;
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asection *section ATTRIBUTE_UNUSED;
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bfd_vma address ATTRIBUTE_UNUSED;
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{
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return TRUE;
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}
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static bfd_boolean
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simple_dummy_reloc_dangerous (link_info, message, abfd, section, address)
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struct bfd_link_info *link_info ATTRIBUTE_UNUSED;
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const char *message ATTRIBUTE_UNUSED;
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bfd *abfd ATTRIBUTE_UNUSED;
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asection *section ATTRIBUTE_UNUSED;
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bfd_vma address ATTRIBUTE_UNUSED;
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{
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return TRUE;
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}
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static bfd_boolean
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simple_dummy_unattached_reloc (link_info, name, abfd, section, address)
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struct bfd_link_info *link_info ATTRIBUTE_UNUSED;
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const char *name ATTRIBUTE_UNUSED;
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bfd *abfd ATTRIBUTE_UNUSED;
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asection *section ATTRIBUTE_UNUSED;
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bfd_vma address ATTRIBUTE_UNUSED;
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{
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return TRUE;
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}
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/*
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FUNCTION
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bfd_simple_relocate_secton
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SYNOPSIS
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bfd_byte *bfd_simple_get_relocated_section_contents (bfd *abfd, asection *sec, bfd_byte *outbuf);
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DESCRIPTION
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Returns the relocated contents of section @var{sec}. Only symbols
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from @var{abfd} and the output offsets assigned to sections in
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@var{abfd} are used. The result will be stored at @var{outbuf}
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or allocated with @code{bfd_malloc} if @var{outbuf} is @code{NULL}.
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Generally all sections in @var{abfd} should have their
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@code{output_section} pointing back to the original section.
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Returns @code{NULL} on a fatal error; ignores errors applying
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particular relocations.
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*/
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bfd_byte *
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bfd_simple_get_relocated_section_contents (abfd, sec, outbuf)
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bfd *abfd;
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asection *sec;
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bfd_byte *outbuf;
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{
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struct bfd_link_info link_info;
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struct bfd_link_order link_order;
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struct bfd_link_callbacks callbacks;
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bfd_byte *contents, *data;
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int storage_needed, number_of_symbols;
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asymbol **symbol_table;
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if (! (sec->flags & SEC_RELOC))
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{
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bfd_size_type size = bfd_section_size (abfd, sec);
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if (outbuf == NULL)
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contents = bfd_malloc (size);
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else
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contents = outbuf;
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if (contents)
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bfd_get_section_contents (abfd, sec, contents, 0, size);
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return contents;
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}
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/* In order to use bfd_get_relocated_section_contents, we need
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to forge some data structures that it expects. */
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/* Fill in the bare minimum number of fields for our purposes. */
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memset (&link_info, 0, sizeof (link_info));
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link_info.input_bfds = abfd;
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link_info.hash = bfd_link_hash_table_create (abfd);
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link_info.callbacks = &callbacks;
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callbacks.warning = simple_dummy_warning;
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callbacks.undefined_symbol = simple_dummy_undefined_symbol;
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callbacks.reloc_overflow = simple_dummy_reloc_overflow;
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callbacks.reloc_dangerous = simple_dummy_reloc_dangerous;
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callbacks.unattached_reloc = simple_dummy_unattached_reloc;
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memset (&link_order, 0, sizeof (link_order));
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link_order.next = NULL;
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link_order.type = bfd_indirect_link_order;
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link_order.offset = 0;
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link_order.size = bfd_section_size (abfd, sec);
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link_order.u.indirect.section = sec;
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data = NULL;
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if (outbuf == NULL)
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{
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data = bfd_malloc (bfd_section_size (abfd, sec));
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if (data == NULL)
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return NULL;
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outbuf = data;
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}
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bfd_link_add_symbols (abfd, &link_info);
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storage_needed = bfd_get_symtab_upper_bound (abfd);
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symbol_table = (asymbol **) bfd_malloc (storage_needed);
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number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table);
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contents = bfd_get_relocated_section_contents (abfd,
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&link_info,
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&link_order,
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outbuf,
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0,
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symbol_table);
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if (contents == NULL && data != NULL)
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free (data);
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/* Foul hack to prevent bfd_section_size aborts. This flag only controls
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that macro (and the related size macros), selecting between _raw_size
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and _cooked_size. Debug sections won't change size while we're only
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relocating. There may be trouble here someday if it tries to run
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relaxation unexpectedly, so make sure. */
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BFD_ASSERT (sec->_raw_size == sec->_cooked_size);
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sec->reloc_done = 0;
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bfd_link_hash_table_free (abfd, link_info.hash);
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return contents;
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}
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