1 /* simple.c -- BFD simple client routines
2 Copyright 2002, 2003, 2004, 2005, 2007
3 Free Software Foundation, Inc.
4 Contributed by MontaVista Software, Inc.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
29 simple_dummy_warning (struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
30 const char *warning ATTRIBUTE_UNUSED,
31 const char *symbol ATTRIBUTE_UNUSED,
32 bfd *abfd ATTRIBUTE_UNUSED,
33 asection *section ATTRIBUTE_UNUSED,
34 bfd_vma address ATTRIBUTE_UNUSED)
40 simple_dummy_undefined_symbol (struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
41 const char *name ATTRIBUTE_UNUSED,
42 bfd *abfd ATTRIBUTE_UNUSED,
43 asection *section ATTRIBUTE_UNUSED,
44 bfd_vma address ATTRIBUTE_UNUSED,
45 bfd_boolean fatal ATTRIBUTE_UNUSED)
51 simple_dummy_reloc_overflow (struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
52 struct bfd_link_hash_entry *entry ATTRIBUTE_UNUSED,
53 const char *name ATTRIBUTE_UNUSED,
54 const char *reloc_name ATTRIBUTE_UNUSED,
55 bfd_vma addend ATTRIBUTE_UNUSED,
56 bfd *abfd ATTRIBUTE_UNUSED,
57 asection *section ATTRIBUTE_UNUSED,
58 bfd_vma address ATTRIBUTE_UNUSED)
64 simple_dummy_reloc_dangerous (struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
65 const char *message ATTRIBUTE_UNUSED,
66 bfd *abfd ATTRIBUTE_UNUSED,
67 asection *section ATTRIBUTE_UNUSED,
68 bfd_vma address ATTRIBUTE_UNUSED)
74 simple_dummy_unattached_reloc (struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
75 const char *name ATTRIBUTE_UNUSED,
76 bfd *abfd ATTRIBUTE_UNUSED,
77 asection *section ATTRIBUTE_UNUSED,
78 bfd_vma address ATTRIBUTE_UNUSED)
84 simple_dummy_multiple_definition (struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
85 const char *name ATTRIBUTE_UNUSED,
86 bfd *obfd ATTRIBUTE_UNUSED,
87 asection *osec ATTRIBUTE_UNUSED,
88 bfd_vma oval ATTRIBUTE_UNUSED,
89 bfd *nbfd ATTRIBUTE_UNUSED,
90 asection *nsec ATTRIBUTE_UNUSED,
91 bfd_vma nval ATTRIBUTE_UNUSED)
97 simple_dummy_einfo (const char *fmt ATTRIBUTE_UNUSED, ...)
101 struct saved_output_info
108 simple_save_output_info (bfd *abfd ATTRIBUTE_UNUSED,
112 struct saved_output_info *output_info = ptr;
113 output_info[section->index].offset = section->output_offset;
114 output_info[section->index].section = section->output_section;
115 if ((section->flags & SEC_DEBUGGING) != 0
116 || section->output_section == NULL)
118 section->output_offset = 0;
119 section->output_section = section;
124 simple_restore_output_info (bfd *abfd ATTRIBUTE_UNUSED,
128 struct saved_output_info *output_info = ptr;
129 section->output_offset = output_info[section->index].offset;
130 section->output_section = output_info[section->index].section;
135 bfd_simple_relocate_secton
138 bfd_byte *bfd_simple_get_relocated_section_contents
139 (bfd *abfd, asection *sec, bfd_byte *outbuf, asymbol **symbol_table);
142 Returns the relocated contents of section @var{sec}. The symbols in
143 @var{symbol_table} will be used, or the symbols from @var{abfd} if
144 @var{symbol_table} is NULL. The output offsets for debug sections will
145 be temporarily reset to 0. The result will be stored at @var{outbuf}
146 or allocated with @code{bfd_malloc} if @var{outbuf} is @code{NULL}.
148 Returns @code{NULL} on a fatal error; ignores errors applying
149 particular relocations.
153 bfd_simple_get_relocated_section_contents (bfd *abfd,
156 asymbol **symbol_table)
158 struct bfd_link_info link_info;
159 struct bfd_link_order link_order;
160 struct bfd_link_callbacks callbacks;
161 bfd_byte *contents, *data;
165 if (! (sec->flags & SEC_RELOC))
167 bfd_size_type amt = sec->rawsize > sec->size ? sec->rawsize : sec->size;
168 bfd_size_type size = sec->rawsize ? sec->rawsize : sec->size;
171 contents = bfd_malloc (amt);
176 bfd_get_section_contents (abfd, sec, contents, 0, size);
181 /* In order to use bfd_get_relocated_section_contents, we need
182 to forge some data structures that it expects. */
184 /* Fill in the bare minimum number of fields for our purposes. */
185 memset (&link_info, 0, sizeof (link_info));
186 link_info.input_bfds = abfd;
187 link_info.input_bfds_tail = &abfd->link_next;
189 link_info.hash = _bfd_generic_link_hash_table_create (abfd);
190 link_info.callbacks = &callbacks;
191 callbacks.warning = simple_dummy_warning;
192 callbacks.undefined_symbol = simple_dummy_undefined_symbol;
193 callbacks.reloc_overflow = simple_dummy_reloc_overflow;
194 callbacks.reloc_dangerous = simple_dummy_reloc_dangerous;
195 callbacks.unattached_reloc = simple_dummy_unattached_reloc;
196 callbacks.multiple_definition = simple_dummy_multiple_definition;
197 callbacks.einfo = simple_dummy_einfo;
199 memset (&link_order, 0, sizeof (link_order));
200 link_order.next = NULL;
201 link_order.type = bfd_indirect_link_order;
202 link_order.offset = 0;
203 link_order.size = sec->size;
204 link_order.u.indirect.section = sec;
209 data = bfd_malloc (sec->size);
215 /* The sections in ABFD may already have output sections and offsets set.
216 Because this function is primarily for debug sections, and GCC uses the
217 knowledge that debug sections will generally have VMA 0 when emitting
218 relocations between DWARF-2 sections (which are supposed to be
219 section-relative offsets anyway), we need to reset the output offsets
220 to zero. We also need to arrange for section->output_section->vma plus
221 section->output_offset to equal section->vma, which we do by setting
222 section->output_section to point back to section. Save the original
223 output offset and output section to restore later. */
224 saved_offsets = malloc (sizeof (struct saved_output_info)
225 * abfd->section_count);
226 if (saved_offsets == NULL)
232 bfd_map_over_sections (abfd, simple_save_output_info, saved_offsets);
234 if (symbol_table == NULL)
236 _bfd_generic_link_add_symbols (abfd, &link_info);
238 storage_needed = bfd_get_symtab_upper_bound (abfd);
239 symbol_table = bfd_malloc (storage_needed);
240 bfd_canonicalize_symtab (abfd, symbol_table);
245 contents = bfd_get_relocated_section_contents (abfd,
251 if (contents == NULL && data != NULL)
254 bfd_map_over_sections (abfd, simple_restore_output_info, saved_offsets);
255 free (saved_offsets);
257 _bfd_generic_link_hash_table_free (link_info.hash);