1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
|
/****************************************************************************
* binfmt/libelf/libelf.h
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
#ifndef __BINFMT_LIBELF_LIBELF_H
#define __BINFMT_LIBELF_LIBELF_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <elf32.h>
#include <nuttx/binfmt/elf.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Public Types
****************************************************************************/
/****************************************************************************
* Name: elf_verifyheader
*
* Description:
* Given the header from a possible ELF executable, verify that it is
* an ELF executable.
*
* Returned Value:
* 0 (OK) is returned on success and a negated errno is returned on
* failure.
*
****************************************************************************/
int elf_verifyheader(FAR const Elf32_Ehdr *header);
/****************************************************************************
* Name: elf_read
*
* Description:
* Read 'readsize' bytes from the object file at 'offset'
*
* Returned Value:
* 0 (OK) is returned on success and a negated errno is returned on
* failure.
*
****************************************************************************/
int elf_read(FAR struct elf_loadinfo_s *loadinfo, FAR uint8_t *buffer,
size_t readsize, off_t offset);
/****************************************************************************
* Name: elf_loadshdrs
*
* Description:
* Loads section headers into memory.
*
* Returned Value:
* 0 (OK) is returned on success and a negated errno is returned on
* failure.
*
****************************************************************************/
int elf_loadshdrs(FAR struct elf_loadinfo_s *loadinfo);
/****************************************************************************
* Name: elf_findsection
*
* Description:
* A section by its name.
*
* Input Parameters:
* loadinfo - Load state information
* sectname - Name of the section to find
*
* Returned Value:
* On success, the index to the section is returned; A negated errno value
* is returned on failure.
*
****************************************************************************/
int elf_findsection(FAR struct elf_loadinfo_s *loadinfo,
FAR const char *sectname);
/****************************************************************************
* Name: elf_findsymtab
*
* Description:
* Find the symbol table section.
*
* Returned Value:
* 0 (OK) is returned on success and a negated errno is returned on
* failure.
*
****************************************************************************/
int elf_findsymtab(FAR struct elf_loadinfo_s *loadinfo);
/****************************************************************************
* Name: elf_readsym
*
* Description:
* Read the ELFT symbol structure at the specfied index into memory.
*
* Input Parameters:
* loadinfo - Load state information
* index - Symbol table index
* sym - Location to return the table entry
*
* Returned Value:
* 0 (OK) is returned on success and a negated errno is returned on
* failure.
*
****************************************************************************/
int elf_readsym(FAR struct elf_loadinfo_s *loadinfo, int index,
FAR Elf32_Sym *sym);
/****************************************************************************
* Name: elf_symvalue
*
* Description:
* Get the value of a symbol. The updated value of the symbol is returned
* in the st_value field of the symbol table entry.
*
* Input Parameters:
* loadinfo - Load state information
* sym - Symbol table entry (value might be undefined)
* exports - The symbol table to use for resolving undefined symbols.
* nexports - Number of symbols in the symbol table.
*
* Returned Value:
* 0 (OK) is returned on success and a negated errno is returned on
* failure.
*
****************************************************************************/
int elf_symvalue(FAR struct elf_loadinfo_s *loadinfo, FAR Elf32_Sym *sym,
FAR const struct symtab_s *exports, int nexports);
/****************************************************************************
* Name: elf_freebuffers
*
* Description:
* Release all working buffers.
*
* Returned Value:
* 0 (OK) is returned on success and a negated errno is returned on
* failure.
*
****************************************************************************/
int elf_freebuffers(FAR struct elf_loadinfo_s *loadinfo);
/****************************************************************************
* Name: elf_allocbuffer
*
* Description:
* Perform the initial allocation of the I/O buffer, if it has not already
* been allocated.
*
* Returned Value:
* 0 (OK) is returned on success and a negated errno is returned on
* failure.
*
****************************************************************************/
int elf_allocbuffer(FAR struct elf_loadinfo_s *loadinfo);
/****************************************************************************
* Name: elf_reallocbuffer
*
* Description:
* Increase the size of I/O buffer by the specified buffer increment.
*
* Returned Value:
* 0 (OK) is returned on success and a negated errno is returned on
* failure.
*
****************************************************************************/
int elf_reallocbuffer(FAR struct elf_loadinfo_s *loadinfo, size_t increment);
/****************************************************************************
* Name: elf_findctors
*
* Description:
* Find C++ static constructors.
*
* Input Parameters:
* loadinfo - Load state information
*
* Returned Value:
* 0 (OK) is returned on success and a negated errno is returned on
* failure.
*
****************************************************************************/
#ifdef CONFIG_BINFMT_CONSTRUCTORS
int elf_loadctors(FAR struct elf_loadinfo_s *loadinfo);
#endif
/****************************************************************************
* Name: elf_loaddtors
*
* Description:
* Load pointers to static destructors into an in-memory array.
*
* Input Parameters:
* loadinfo - Load state information
*
* Returned Value:
* 0 (OK) is returned on success and a negated errno is returned on
* failure.
*
****************************************************************************/
#ifdef CONFIG_BINFMT_CONSTRUCTORS
int elf_loaddtors(FAR struct elf_loadinfo_s *loadinfo);
#endif
#endif /* __BINFMT_LIBELF_LIBELF_H */
|
