1 /* simple.c -- BFD simple client routines
2 Copyright 2002, 2003, 2004
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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
28 simple_dummy_warning (struct bfd_link_info
*link_info ATTRIBUTE_UNUSED
,
29 const char *warning ATTRIBUTE_UNUSED
,
30 const char *symbol ATTRIBUTE_UNUSED
,
31 bfd
*abfd ATTRIBUTE_UNUSED
,
32 asection
*section ATTRIBUTE_UNUSED
,
33 bfd_vma address ATTRIBUTE_UNUSED
)
39 simple_dummy_undefined_symbol (struct bfd_link_info
*link_info ATTRIBUTE_UNUSED
,
40 const char *name ATTRIBUTE_UNUSED
,
41 bfd
*abfd ATTRIBUTE_UNUSED
,
42 asection
*section ATTRIBUTE_UNUSED
,
43 bfd_vma address ATTRIBUTE_UNUSED
,
44 bfd_boolean fatal ATTRIBUTE_UNUSED
)
50 simple_dummy_reloc_overflow (struct bfd_link_info
*link_info ATTRIBUTE_UNUSED
,
51 struct bfd_link_hash_entry
*entry ATTRIBUTE_UNUSED
,
52 const char *name ATTRIBUTE_UNUSED
,
53 const char *reloc_name ATTRIBUTE_UNUSED
,
54 bfd_vma addend ATTRIBUTE_UNUSED
,
55 bfd
*abfd ATTRIBUTE_UNUSED
,
56 asection
*section ATTRIBUTE_UNUSED
,
57 bfd_vma address ATTRIBUTE_UNUSED
)
63 simple_dummy_reloc_dangerous (struct bfd_link_info
*link_info ATTRIBUTE_UNUSED
,
64 const char *message ATTRIBUTE_UNUSED
,
65 bfd
*abfd ATTRIBUTE_UNUSED
,
66 asection
*section ATTRIBUTE_UNUSED
,
67 bfd_vma address ATTRIBUTE_UNUSED
)
73 simple_dummy_unattached_reloc (struct bfd_link_info
*link_info ATTRIBUTE_UNUSED
,
74 const char *name ATTRIBUTE_UNUSED
,
75 bfd
*abfd ATTRIBUTE_UNUSED
,
76 asection
*section ATTRIBUTE_UNUSED
,
77 bfd_vma address ATTRIBUTE_UNUSED
)
82 struct saved_output_info
89 simple_save_output_info (bfd
*abfd ATTRIBUTE_UNUSED
,
93 struct saved_output_info
*output_info
= ptr
;
94 output_info
[section
->index
].offset
= section
->output_offset
;
95 output_info
[section
->index
].section
= section
->output_section
;
96 if ((section
->flags
& SEC_DEBUGGING
) != 0
97 || section
->output_section
== NULL
)
99 section
->output_offset
= 0;
100 section
->output_section
= section
;
105 simple_restore_output_info (bfd
*abfd ATTRIBUTE_UNUSED
,
109 struct saved_output_info
*output_info
= ptr
;
110 section
->output_offset
= output_info
[section
->index
].offset
;
111 section
->output_section
= output_info
[section
->index
].section
;
116 bfd_simple_relocate_secton
119 bfd_byte *bfd_simple_get_relocated_section_contents
120 (bfd *abfd, asection *sec, bfd_byte *outbuf, asymbol **symbol_table);
123 Returns the relocated contents of section @var{sec}. The symbols in
124 @var{symbol_table} will be used, or the symbols from @var{abfd} if
125 @var{symbol_table} is NULL. The output offsets for debug sections will
126 be temporarily reset to 0. The result will be stored at @var{outbuf}
127 or allocated with @code{bfd_malloc} if @var{outbuf} is @code{NULL}.
129 Returns @code{NULL} on a fatal error; ignores errors applying
130 particular relocations.
134 bfd_simple_get_relocated_section_contents (bfd
*abfd
,
137 asymbol
**symbol_table
)
139 struct bfd_link_info link_info
;
140 struct bfd_link_order link_order
;
141 struct bfd_link_callbacks callbacks
;
142 bfd_byte
*contents
, *data
;
146 if (! (sec
->flags
& SEC_RELOC
))
148 bfd_size_type amt
= sec
->rawsize
> sec
->size
? sec
->rawsize
: sec
->size
;
149 bfd_size_type size
= sec
->rawsize
? sec
->rawsize
: sec
->size
;
152 contents
= bfd_malloc (amt
);
157 bfd_get_section_contents (abfd
, sec
, contents
, 0, size
);
162 /* In order to use bfd_get_relocated_section_contents, we need
163 to forge some data structures that it expects. */
165 /* Fill in the bare minimum number of fields for our purposes. */
166 memset (&link_info
, 0, sizeof (link_info
));
167 link_info
.input_bfds
= abfd
;
169 link_info
.hash
= _bfd_generic_link_hash_table_create (abfd
);
170 link_info
.callbacks
= &callbacks
;
171 callbacks
.warning
= simple_dummy_warning
;
172 callbacks
.undefined_symbol
= simple_dummy_undefined_symbol
;
173 callbacks
.reloc_overflow
= simple_dummy_reloc_overflow
;
174 callbacks
.reloc_dangerous
= simple_dummy_reloc_dangerous
;
175 callbacks
.unattached_reloc
= simple_dummy_unattached_reloc
;
177 memset (&link_order
, 0, sizeof (link_order
));
178 link_order
.next
= NULL
;
179 link_order
.type
= bfd_indirect_link_order
;
180 link_order
.offset
= 0;
181 link_order
.size
= sec
->size
;
182 link_order
.u
.indirect
.section
= sec
;
187 data
= bfd_malloc (sec
->size
);
193 /* The sections in ABFD may already have output sections and offsets set.
194 Because this function is primarily for debug sections, and GCC uses the
195 knowledge that debug sections will generally have VMA 0 when emitting
196 relocations between DWARF-2 sections (which are supposed to be
197 section-relative offsets anyway), we need to reset the output offsets
198 to zero. We also need to arrange for section->output_section->vma plus
199 section->output_offset to equal section->vma, which we do by setting
200 section->output_section to point back to section. Save the original
201 output offset and output section to restore later. */
202 saved_offsets
= malloc (sizeof (struct saved_output_info
)
203 * abfd
->section_count
);
204 if (saved_offsets
== NULL
)
210 bfd_map_over_sections (abfd
, simple_save_output_info
, saved_offsets
);
212 if (symbol_table
== NULL
)
214 _bfd_generic_link_add_symbols (abfd
, &link_info
);
216 storage_needed
= bfd_get_symtab_upper_bound (abfd
);
217 symbol_table
= bfd_malloc (storage_needed
);
218 bfd_canonicalize_symtab (abfd
, symbol_table
);
223 contents
= bfd_get_relocated_section_contents (abfd
,
229 if (contents
== NULL
&& data
!= NULL
)
233 /* NOTE: cagney/2003-04-05: This free, which was introduced on
234 2003-03-31 to stop a memory leak, caused a memory corruption
235 between GDB and BFD. The problem, which is stabs specific, can
236 be identified by a bunch of failures in relocate.exp vis:
238 gdb.base/relocate.exp: get address of static_bar
240 Details of the problem can be found on the binutils@ mailing
241 list, see the discussion thread: "gdb.mi/mi-cli.exp failures". */
242 if (storage_needed
!= 0)
246 bfd_map_over_sections (abfd
, simple_restore_output_info
, saved_offsets
);
247 free (saved_offsets
);
249 _bfd_generic_link_hash_table_free (link_info
.hash
);