1READELF(1) GNU Development Tools READELF(1)
2
6 readelf - Displays information about ELF files.
7
9 readelf [-a|--all]
10 [-h|--file-header]
11 [-l|--program-headers|--segments]
12 [-S|--section-headers|--sections]
13 [-g|--section-groups]
14 [-t|--section-details]
15 [-e|--headers]
16 [-s|--syms|--symbols]
17 [--dyn-syms]
18 [-n|--notes]
19 [-r|--relocs]
20 [-u|--unwind]
21 [-d|--dynamic]
22 [-V|--version-info]
23 [-A|--arch-specific]
24 [-D|--use-dynamic]
25 [-x <number or name>|--hex-dump=<number or name>]
26 [-p <number or name>|--string-dump=<number or name>]
27 [-R <number or name>|--relocated-dump=<number or name>]
28 [-z|--decompress]
29 [-c|--archive-index]
30 [-w[lLiaprmfFsoRt]|
31 --debug-dump[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames-interp,=str,=loc,=Ranges,=pubtypes,=trace_info,=trace_abbrev,=trace_aranges,=gdb_index]]
32 [--dwarf-depth=n]
33 [--dwarf-start=n]
34 [-I|--histogram]
35 [-v|--version]
36 [-W|--wide]
37 [-H|--help]
38 elffile...
39
41 readelf displays information about one or more ELF format object files.
42 The options control what particular information to display.
43 elffile... are the object files to be examined. 32-bit and 64-bit ELF
45 files are supported, as are archives containing ELF files.
46 This program performs a similar function to objdump but it goes into
48 more detail and it exists independently of the BFD library, so if there
49 is a bug in BFD then readelf will not be affected.
50
52 The long and short forms of options, shown here as alternatives, are
53 equivalent. At least one option besides -v or -H must be given.
54 -a
56 --all
57 Equivalent to specifying --file-header, --program-headers,
58 --sections, --symbols, --relocs, --dynamic, --notes and
59 --version-info.
60 -h
62 --file-header
63 Displays the information contained in the ELF header at the start
64 of the file.
65 -l
67 --program-headers
68 --segments
69 Displays the information contained in the file's segment headers,
70 if it has any.
71 -S
73 --sections
74 --section-headers
75 Displays the information contained in the file's section headers,
76 if it has any.
77 -g
79 --section-groups
80 Displays the information contained in the file's section groups, if
81 it has any.
82 -t
84 --section-details
85 Displays the detailed section information. Implies -S.
86 -s
88 --symbols
89 --syms
90 Displays the entries in symbol table section of the file, if it has
91 one.
92 --dyn-syms
94 Displays the entries in dynamic symbol table section of the file,
95 if it has one.
96 -e
98 --headers
99 Display all the headers in the file. Equivalent to -h -l -S.
100 -n
102 --notes
103 Displays the contents of the NOTE segments and/or sections, if any.
104 -r
106 --relocs
107 Displays the contents of the file's relocation section, if it has
108 one.
109 -u
111 --unwind
112 Displays the contents of the file's unwind section, if it has one.
113 Only the unwind sections for IA64 ELF files, as well as ARM unwind
114 tables (".ARM.exidx" / ".ARM.extab") are currently supported.
115 -d
117 --dynamic
118 Displays the contents of the file's dynamic section, if it has one.
119 -V
121 --version-info
122 Displays the contents of the version sections in the file, it they
123 exist.
124 -A
126 --arch-specific
127 Displays architecture-specific information in the file, if there is
128 any.
129 -D
131 --use-dynamic
132 When displaying symbols, this option makes readelf use the symbol
133 hash tables in the file's dynamic section, rather than the symbol
134 table sections.
135 -x <number or name>
137 --hex-dump=<number or name>
138 Displays the contents of the indicated section as a hexadecimal
139 bytes. A number identifies a particular section by index in the
140 section table; any other string identifies all sections with that
141 name in the object file.
142 -R <number or name>
144 --relocated-dump=<number or name>
145 Displays the contents of the indicated section as a hexadecimal
146 bytes. A number identifies a particular section by index in the
147 section table; any other string identifies all sections with that
148 name in the object file. The contents of the section will be
149 relocated before they are displayed.
150 -p <number or name>
152 --string-dump=<number or name>
153 Displays the contents of the indicated section as printable
154 strings. A number identifies a particular section by index in the
155 section table; any other string identifies all sections with that
156 name in the object file.
157 -z
159 --decompress
160 Requests that the section(s) being dumped by x, R or p options are
161 decompressed before being displayed. If the section(s) are not
162 compressed then they are displayed as is.
163 -c
165 --archive-index
166 Displays the file symbol index information contained in the header
167 part of binary archives. Performs the same function as the t
168 command to ar, but without using the BFD library.
169 -w[lLiaprmfFsoRt]
171 --debug-dump[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames-interp,=str,=loc,=Ranges,=pubtypes,=trace_info,=trace_abbrev,=trace_aranges,=gdb_index]
172 Displays the contents of the debug sections in the file, if any are
173 present. If one of the optional letters or words follows the
174 switch then only data found in those specific sections will be
175 dumped.
176 Note that there is no single letter option to display the content
178 of trace sections or .gdb_index.
179 Note: the =decodedline option will display the interpreted contents
181 of a .debug_line section whereas the =rawline option dumps the
182 contents in a raw format.
183 Note: the =frames-interp option will display the interpreted
185 contents of a .debug_frame section whereas the =frames option dumps
186 the contents in a raw format.
187 Note: the output from the =info option can also be affected by the
189 options --dwarf-depth and --dwarf-start.
190 --dwarf-depth=n
192 Limit the dump of the ".debug_info" section to n children. This is
193 only useful with --debug-dump=info. The default is to print all
194 DIEs; the special value 0 for n will also have this effect.
195 With a non-zero value for n, DIEs at or deeper than n levels will
197 not be printed. The range for n is zero-based.
198 --dwarf-start=n
200 Print only DIEs beginning with the DIE numbered n. This is only
201 useful with --debug-dump=info.
202 If specified, this option will suppress printing of any header
204 information and all DIEs before the DIE numbered n. Only siblings
205 and children of the specified DIE will be printed.
206 This can be used in conjunction with --dwarf-depth.
208 -I
210 --histogram
211 Display a histogram of bucket list lengths when displaying the
212 contents of the symbol tables.
213 -v
215 --version
216 Display the version number of readelf.
217 -W
219 --wide
220 Don't break output lines to fit into 80 columns. By default readelf
221 breaks section header and segment listing lines for 64-bit ELF
222 files, so that they fit into 80 columns. This option causes readelf
223 to print each section header resp. each segment one a single line,
224 which is far more readable on terminals wider than 80 columns.
225 -H
227 --help
228 Display the command line options understood by readelf.
229 @file
231 Read command-line options from file. The options read are inserted
232 in place of the original @file option. If file does not exist, or
233 cannot be read, then the option will be treated literally, and not
234 removed.
235 Options in file are separated by whitespace. A whitespace
237 character may be included in an option by surrounding the entire
238 option in either single or double quotes. Any character (including
239 a backslash) may be included by prefixing the character to be
240 included with a backslash. The file may itself contain additional
241 @file options; any such options will be processed recursively.
242
244 objdump(1), and the Info entries for binutils.
245
247 Copyright (c) 1991-2016 Free Software Foundation, Inc.
248 Permission is granted to copy, distribute and/or modify this document
250 under the terms of the GNU Free Documentation License, Version 1.3 or
251 any later version published by the Free Software Foundation; with no
252 Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
253 Texts. A copy of the license is included in the section entitled "GNU
254 Free Documentation License".
255binutils-2.27 2016-08-03 READELF(1)