Commit | Line | Data |
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af39267e | 1 | /* simple.c -- BFD simple client routines |
57a1784e | 2 | Copyright 2002, 2003, 2004 |
af39267e DJ |
3 | Free Software Foundation, Inc. |
4 | Contributed by MontaVista Software, Inc. | |
5 | ||
6 | This file is part of BFD, the Binary File Descriptor library. | |
7 | ||
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. | |
12 | ||
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. | |
17 | ||
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. */ | |
21 | ||
22 | #include "bfd.h" | |
23 | #include "sysdep.h" | |
24 | #include "libbfd.h" | |
25 | #include "bfdlink.h" | |
26 | ||
b34976b6 | 27 | static bfd_boolean |
c58b9523 AM |
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) | |
af39267e | 34 | { |
b34976b6 | 35 | return TRUE; |
af39267e DJ |
36 | } |
37 | ||
b34976b6 | 38 | static bfd_boolean |
c58b9523 AM |
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) | |
af39267e | 45 | { |
b34976b6 | 46 | return TRUE; |
af39267e DJ |
47 | } |
48 | ||
b34976b6 | 49 | static bfd_boolean |
c58b9523 AM |
50 | simple_dummy_reloc_overflow (struct bfd_link_info *link_info ATTRIBUTE_UNUSED, |
51 | const char *name ATTRIBUTE_UNUSED, | |
52 | const char *reloc_name ATTRIBUTE_UNUSED, | |
53 | bfd_vma addend ATTRIBUTE_UNUSED, | |
54 | bfd *abfd ATTRIBUTE_UNUSED, | |
55 | asection *section ATTRIBUTE_UNUSED, | |
56 | bfd_vma address ATTRIBUTE_UNUSED) | |
af39267e | 57 | { |
b34976b6 | 58 | return TRUE; |
af39267e DJ |
59 | } |
60 | ||
b34976b6 | 61 | static bfd_boolean |
c58b9523 AM |
62 | simple_dummy_reloc_dangerous (struct bfd_link_info *link_info ATTRIBUTE_UNUSED, |
63 | const char *message ATTRIBUTE_UNUSED, | |
64 | bfd *abfd ATTRIBUTE_UNUSED, | |
65 | asection *section ATTRIBUTE_UNUSED, | |
66 | bfd_vma address ATTRIBUTE_UNUSED) | |
af39267e | 67 | { |
b34976b6 | 68 | return TRUE; |
af39267e DJ |
69 | } |
70 | ||
b34976b6 | 71 | static bfd_boolean |
c58b9523 AM |
72 | simple_dummy_unattached_reloc (struct bfd_link_info *link_info ATTRIBUTE_UNUSED, |
73 | const char *name ATTRIBUTE_UNUSED, | |
74 | bfd *abfd ATTRIBUTE_UNUSED, | |
75 | asection *section ATTRIBUTE_UNUSED, | |
76 | bfd_vma address ATTRIBUTE_UNUSED) | |
af39267e | 77 | { |
b34976b6 | 78 | return TRUE; |
af39267e DJ |
79 | } |
80 | ||
6e84a906 DJ |
81 | struct saved_output_info |
82 | { | |
83 | bfd_vma offset; | |
84 | asection *section; | |
85 | }; | |
86 | ||
87 | static void | |
c58b9523 AM |
88 | simple_save_output_info (bfd *abfd ATTRIBUTE_UNUSED, |
89 | asection *section, | |
90 | void *ptr) | |
6e84a906 | 91 | { |
c58b9523 | 92 | struct saved_output_info *output_info = ptr; |
6e84a906 DJ |
93 | output_info[section->index].offset = section->output_offset; |
94 | output_info[section->index].section = section->output_section; | |
1ba54ee0 AM |
95 | if ((section->flags & SEC_DEBUGGING) != 0 |
96 | || section->output_section == NULL) | |
97 | { | |
98 | section->output_offset = 0; | |
99 | section->output_section = section; | |
100 | } | |
6e84a906 DJ |
101 | } |
102 | ||
103 | static void | |
c58b9523 AM |
104 | simple_restore_output_info (bfd *abfd ATTRIBUTE_UNUSED, |
105 | asection *section, | |
106 | void *ptr) | |
6e84a906 | 107 | { |
c58b9523 | 108 | struct saved_output_info *output_info = ptr; |
6e84a906 DJ |
109 | section->output_offset = output_info[section->index].offset; |
110 | section->output_section = output_info[section->index].section; | |
111 | } | |
112 | ||
af39267e DJ |
113 | /* |
114 | FUNCTION | |
115 | bfd_simple_relocate_secton | |
116 | ||
117 | SYNOPSIS | |
c58b9523 AM |
118 | bfd_byte *bfd_simple_get_relocated_section_contents |
119 | (bfd *abfd, asection *sec, bfd_byte *outbuf, asymbol **symbol_table); | |
af39267e DJ |
120 | |
121 | DESCRIPTION | |
6e84a906 DJ |
122 | Returns the relocated contents of section @var{sec}. The symbols in |
123 | @var{symbol_table} will be used, or the symbols from @var{abfd} if | |
1ba54ee0 | 124 | @var{symbol_table} is NULL. The output offsets for debug sections will |
6e84a906 | 125 | be temporarily reset to 0. The result will be stored at @var{outbuf} |
af39267e DJ |
126 | or allocated with @code{bfd_malloc} if @var{outbuf} is @code{NULL}. |
127 | ||
af39267e DJ |
128 | Returns @code{NULL} on a fatal error; ignores errors applying |
129 | particular relocations. | |
130 | */ | |
131 | ||
132 | bfd_byte * | |
c58b9523 AM |
133 | bfd_simple_get_relocated_section_contents (bfd *abfd, |
134 | asection *sec, | |
135 | bfd_byte *outbuf, | |
136 | asymbol **symbol_table) | |
af39267e DJ |
137 | { |
138 | struct bfd_link_info link_info; | |
139 | struct bfd_link_order link_order; | |
140 | struct bfd_link_callbacks callbacks; | |
141 | bfd_byte *contents, *data; | |
5ed6aba4 | 142 | int storage_needed; |
c58b9523 | 143 | void *saved_offsets; |
af39267e | 144 | |
ec4530b5 NC |
145 | if (! (sec->flags & SEC_RELOC)) |
146 | { | |
1a23a9e6 | 147 | bfd_size_type amt = sec->rawsize > sec->size ? sec->rawsize : sec->size; |
eea6121a | 148 | bfd_size_type size = sec->rawsize ? sec->rawsize : sec->size; |
ec4530b5 NC |
149 | |
150 | if (outbuf == NULL) | |
1a23a9e6 | 151 | contents = bfd_malloc (amt); |
ec4530b5 NC |
152 | else |
153 | contents = outbuf; | |
154 | ||
155 | if (contents) | |
156 | bfd_get_section_contents (abfd, sec, contents, 0, size); | |
157 | ||
57a1784e | 158 | return contents; |
ec4530b5 NC |
159 | } |
160 | ||
af39267e DJ |
161 | /* In order to use bfd_get_relocated_section_contents, we need |
162 | to forge some data structures that it expects. */ | |
163 | ||
164 | /* Fill in the bare minimum number of fields for our purposes. */ | |
165 | memset (&link_info, 0, sizeof (link_info)); | |
166 | link_info.input_bfds = abfd; | |
167 | ||
228ce064 | 168 | link_info.hash = _bfd_generic_link_hash_table_create (abfd); |
af39267e DJ |
169 | link_info.callbacks = &callbacks; |
170 | callbacks.warning = simple_dummy_warning; | |
171 | callbacks.undefined_symbol = simple_dummy_undefined_symbol; | |
172 | callbacks.reloc_overflow = simple_dummy_reloc_overflow; | |
173 | callbacks.reloc_dangerous = simple_dummy_reloc_dangerous; | |
174 | callbacks.unattached_reloc = simple_dummy_unattached_reloc; | |
175 | ||
176 | memset (&link_order, 0, sizeof (link_order)); | |
177 | link_order.next = NULL; | |
178 | link_order.type = bfd_indirect_link_order; | |
179 | link_order.offset = 0; | |
eea6121a | 180 | link_order.size = sec->size; |
af39267e DJ |
181 | link_order.u.indirect.section = sec; |
182 | ||
183 | data = NULL; | |
184 | if (outbuf == NULL) | |
185 | { | |
eea6121a | 186 | data = bfd_malloc (sec->size); |
af39267e | 187 | if (data == NULL) |
57a1784e | 188 | return NULL; |
af39267e DJ |
189 | outbuf = data; |
190 | } | |
af39267e | 191 | |
6e84a906 DJ |
192 | /* The sections in ABFD may already have output sections and offsets set. |
193 | Because this function is primarily for debug sections, and GCC uses the | |
7dee875e | 194 | knowledge that debug sections will generally have VMA 0 when emitting |
6e84a906 DJ |
195 | relocations between DWARF-2 sections (which are supposed to be |
196 | section-relative offsets anyway), we need to reset the output offsets | |
197 | to zero. We also need to arrange for section->output_section->vma plus | |
198 | section->output_offset to equal section->vma, which we do by setting | |
199 | section->output_section to point back to section. Save the original | |
200 | output offset and output section to restore later. */ | |
201 | saved_offsets = malloc (sizeof (struct saved_output_info) | |
202 | * abfd->section_count); | |
203 | if (saved_offsets == NULL) | |
204 | { | |
205 | if (data) | |
206 | free (data); | |
57a1784e | 207 | return NULL; |
6e84a906 DJ |
208 | } |
209 | bfd_map_over_sections (abfd, simple_save_output_info, saved_offsets); | |
210 | ||
211 | if (symbol_table == NULL) | |
212 | { | |
c82b20e4 | 213 | _bfd_generic_link_add_symbols (abfd, &link_info); |
6e84a906 DJ |
214 | |
215 | storage_needed = bfd_get_symtab_upper_bound (abfd); | |
c58b9523 | 216 | symbol_table = bfd_malloc (storage_needed); |
6e84a906 DJ |
217 | bfd_canonicalize_symtab (abfd, symbol_table); |
218 | } | |
219 | else | |
220 | storage_needed = 0; | |
af39267e DJ |
221 | |
222 | contents = bfd_get_relocated_section_contents (abfd, | |
223 | &link_info, | |
224 | &link_order, | |
225 | outbuf, | |
226 | 0, | |
227 | symbol_table); | |
228 | if (contents == NULL && data != NULL) | |
229 | free (data); | |
230 | ||
8e16317c NC |
231 | #if 0 |
232 | /* NOTE: cagney/2003-04-05: This free, which was introduced on | |
233 | 2003-03-31 to stop a memory leak, caused a memory corruption | |
234 | between GDB and BFD. The problem, which is stabs specific, can | |
235 | be identified by a bunch of failures in relocate.exp vis: | |
236 | ||
237 | gdb.base/relocate.exp: get address of static_bar | |
238 | ||
239 | Details of the problem can be found on the binutils@ mailing | |
240 | list, see the discussion thread: "gdb.mi/mi-cli.exp failures". */ | |
6e84a906 DJ |
241 | if (storage_needed != 0) |
242 | free (symbol_table); | |
8e16317c | 243 | #endif |
6e84a906 DJ |
244 | |
245 | bfd_map_over_sections (abfd, simple_restore_output_info, saved_offsets); | |
246 | free (saved_offsets); | |
247 | ||
010b84c1 | 248 | _bfd_generic_link_hash_table_free (link_info.hash); |
af39267e | 249 | |
57a1784e | 250 | return contents; |
af39267e | 251 | } |