1 /* simple.c -- BFD simple client routines
2 Copyright 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011
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 struct bfd_link_hash_entry
*h ATTRIBUTE_UNUSED
,
86 bfd
*nbfd ATTRIBUTE_UNUSED
,
87 asection
*nsec ATTRIBUTE_UNUSED
,
88 bfd_vma nval ATTRIBUTE_UNUSED
)
94 simple_dummy_einfo (const char *fmt ATTRIBUTE_UNUSED
, ...)
98 struct saved_output_info
107 struct saved_output_info
*sections
;
111 simple_save_output_info (bfd
*abfd ATTRIBUTE_UNUSED
,
115 struct saved_offsets
*saved_offsets
= (struct saved_offsets
*) ptr
;
116 struct saved_output_info
*output_info
;
118 output_info
= &saved_offsets
->sections
[section
->index
];
119 output_info
->offset
= section
->output_offset
;
120 output_info
->section
= section
->output_section
;
121 if ((section
->flags
& SEC_DEBUGGING
) != 0
122 || section
->output_section
== NULL
)
124 section
->output_offset
= 0;
125 section
->output_section
= section
;
130 simple_restore_output_info (bfd
*abfd ATTRIBUTE_UNUSED
,
134 struct saved_offsets
*saved_offsets
= (struct saved_offsets
*) ptr
;
135 struct saved_output_info
*output_info
;
137 if (section
->index
>= saved_offsets
->section_count
)
140 output_info
= &saved_offsets
->sections
[section
->index
];
141 section
->output_offset
= output_info
->offset
;
142 section
->output_section
= output_info
->section
;
147 bfd_simple_relocate_secton
150 bfd_byte *bfd_simple_get_relocated_section_contents
151 (bfd *abfd, asection *sec, bfd_byte *outbuf, asymbol **symbol_table);
154 Returns the relocated contents of section @var{sec}. The symbols in
155 @var{symbol_table} will be used, or the symbols from @var{abfd} if
156 @var{symbol_table} is NULL. The output offsets for debug sections will
157 be temporarily reset to 0. The result will be stored at @var{outbuf}
158 or allocated with @code{bfd_malloc} if @var{outbuf} is @code{NULL}.
160 Returns @code{NULL} on a fatal error; ignores errors applying
161 particular relocations.
165 bfd_simple_get_relocated_section_contents (bfd
*abfd
,
168 asymbol
**symbol_table
)
170 struct bfd_link_info link_info
;
171 struct bfd_link_order link_order
;
172 struct bfd_link_callbacks callbacks
;
173 bfd_byte
*contents
, *data
;
175 struct saved_offsets saved_offsets
;
177 /* Don't apply relocation on executable and shared library. See
179 if ((abfd
->flags
& (HAS_RELOC
| EXEC_P
| DYNAMIC
)) != HAS_RELOC
180 || ! (sec
->flags
& SEC_RELOC
))
183 if (!bfd_get_full_section_contents (abfd
, sec
, &contents
))
188 /* In order to use bfd_get_relocated_section_contents, we need
189 to forge some data structures that it expects. */
191 /* Fill in the bare minimum number of fields for our purposes. */
192 memset (&link_info
, 0, sizeof (link_info
));
193 link_info
.output_bfd
= abfd
;
194 link_info
.input_bfds
= abfd
;
195 link_info
.input_bfds_tail
= &abfd
->link_next
;
197 link_info
.hash
= _bfd_generic_link_hash_table_create (abfd
);
198 link_info
.callbacks
= &callbacks
;
199 callbacks
.warning
= simple_dummy_warning
;
200 callbacks
.undefined_symbol
= simple_dummy_undefined_symbol
;
201 callbacks
.reloc_overflow
= simple_dummy_reloc_overflow
;
202 callbacks
.reloc_dangerous
= simple_dummy_reloc_dangerous
;
203 callbacks
.unattached_reloc
= simple_dummy_unattached_reloc
;
204 callbacks
.multiple_definition
= simple_dummy_multiple_definition
;
205 callbacks
.einfo
= simple_dummy_einfo
;
207 memset (&link_order
, 0, sizeof (link_order
));
208 link_order
.next
= NULL
;
209 link_order
.type
= bfd_indirect_link_order
;
210 link_order
.offset
= 0;
211 link_order
.size
= sec
->size
;
212 link_order
.u
.indirect
.section
= sec
;
217 bfd_size_type amt
= sec
->rawsize
> sec
->size
? sec
->rawsize
: sec
->size
;
218 data
= (bfd_byte
*) bfd_malloc (amt
);
224 /* The sections in ABFD may already have output sections and offsets set.
225 Because this function is primarily for debug sections, and GCC uses the
226 knowledge that debug sections will generally have VMA 0 when emitting
227 relocations between DWARF-2 sections (which are supposed to be
228 section-relative offsets anyway), we need to reset the output offsets
229 to zero. We also need to arrange for section->output_section->vma plus
230 section->output_offset to equal section->vma, which we do by setting
231 section->output_section to point back to section. Save the original
232 output offset and output section to restore later. */
233 saved_offsets
.section_count
= abfd
->section_count
;
234 saved_offsets
.sections
= malloc (sizeof (*saved_offsets
.sections
)
235 * saved_offsets
.section_count
);
236 if (saved_offsets
.sections
== NULL
)
242 bfd_map_over_sections (abfd
, simple_save_output_info
, &saved_offsets
);
244 if (symbol_table
== NULL
)
246 _bfd_generic_link_add_symbols (abfd
, &link_info
);
248 storage_needed
= bfd_get_symtab_upper_bound (abfd
);
249 symbol_table
= (asymbol
**) bfd_malloc (storage_needed
);
250 bfd_canonicalize_symtab (abfd
, symbol_table
);
255 contents
= bfd_get_relocated_section_contents (abfd
,
261 if (contents
== NULL
&& data
!= NULL
)
264 bfd_map_over_sections (abfd
, simple_restore_output_info
, &saved_offsets
);
265 free (saved_offsets
.sections
);
267 _bfd_generic_link_hash_table_free (link_info
.hash
);