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[lLiaprmfFsoRtUuTgAckK]|
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,=addr,=cu_index,=links,=follow-links]]
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,
59 --version-info, --arch-specific, --unwind, --section-groups and
60 --histogram.
61 Note - this option does not enable --use-dynamic itself, so if that
63 option is not present on the command line then dynamic symbols and
64 dynamic relocs will not be displayed.
65 -h
67 --file-header
68 Displays the information contained in the ELF header at the start
69 of the file.
70 -l
72 --program-headers
73 --segments
74 Displays the information contained in the file's segment headers,
75 if it has any.
76 -S
78 --sections
79 --section-headers
80 Displays the information contained in the file's section headers,
81 if it has any.
82 -g
84 --section-groups
85 Displays the information contained in the file's section groups, if
86 it has any.
87 -t
89 --section-details
90 Displays the detailed section information. Implies -S.
91 -s
93 --symbols
94 --syms
95 Displays the entries in symbol table section of the file, if it has
96 one. If a symbol has version information associated with it then
97 this is displayed as well. The version string is displayed as a
98 suffix to the symbol name, preceeded by an @ character. For
99 example foo@VER_1. If the version is the default version to be
100 used when resolving unversioned references to the symbol then it is
101 displayed as a suffix preceeded by two @ characters. For example
102 foo@@VER_2.
103 --dyn-syms
105 Displays the entries in dynamic symbol table section of the file,
106 if it has one. The output format is the same as the format used by
107 the --syms option.
108 -e
110 --headers
111 Display all the headers in the file. Equivalent to -h -l -S.
112 -n
114 --notes
115 Displays the contents of the NOTE segments and/or sections, if any.
116 -r
118 --relocs
119 Displays the contents of the file's relocation section, if it has
120 one.
121 -u
123 --unwind
124 Displays the contents of the file's unwind section, if it has one.
125 Only the unwind sections for IA64 ELF files, as well as ARM unwind
126 tables (".ARM.exidx" / ".ARM.extab") are currently supported.
127 -d
129 --dynamic
130 Displays the contents of the file's dynamic section, if it has one.
131 -V
133 --version-info
134 Displays the contents of the version sections in the file, it they
135 exist.
136 -A
138 --arch-specific
139 Displays architecture-specific information in the file, if there is
140 any.
141 -D
143 --use-dynamic
144 When displaying symbols, this option makes readelf use the symbol
145 hash tables in the file's dynamic section, rather than the symbol
146 table sections.
147 When displaying relocations, this option makes readelf display the
149 dynamic relocations rather than the static relocations.
150 -x <number or name>
152 --hex-dump=<number or name>
153 Displays the contents of the indicated section as a hexadecimal
154 bytes. 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 -R <number or name>
159 --relocated-dump=<number or name>
160 Displays the contents of the indicated section as a hexadecimal
161 bytes. A number identifies a particular section by index in the
162 section table; any other string identifies all sections with that
163 name in the object file. The contents of the section will be
164 relocated before they are displayed.
165 -p <number or name>
167 --string-dump=<number or name>
168 Displays the contents of the indicated section as printable
169 strings. A number identifies a particular section by index in the
170 section table; any other string identifies all sections with that
171 name in the object file.
172 -z
174 --decompress
175 Requests that the section(s) being dumped by x, R or p options are
176 decompressed before being displayed. If the section(s) are not
177 compressed then they are displayed as is.
178 -c
180 --archive-index
181 Displays the file symbol index information contained in the header
182 part of binary archives. Performs the same function as the t
183 command to ar, but without using the BFD library.
184 -w[lLiaprmfFsoRtUuTgAckK]
186 --debug-dump[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames-interp,=str,=loc,=Ranges,=pubtypes,=trace_info,=trace_abbrev,=trace_aranges,=gdb_index,=addr,=cu_index,=links,=follow-links]
187 Displays the contents of the DWARF debug sections in the file, if
188 any are present. Compressed debug sections are automatically
189 decompressed (temporarily) before they are displayed. If one or
190 more of the optional letters or words follows the switch then only
191 those type(s) of data will be dumped. The letters and words refer
192 to the following information:
193 "a"
195 "=abbrev"
196 Displays the contents of the .debug_abbrev section.
197 "A"
199 "=addr"
200 Displays the contents of the .debug_addr section.
201 "c"
203 "=cu_index"
204 Displays the contents of the .debug_cu_index and/or
205 .debug_tu_index sections.
206 "f"
208 "=frames"
209 Display the raw contents of a .debug_frame section.
210 "F"
212 "=frame-interp"
213 Display the interpreted contents of a .debug_frame section.
214 "g"
216 "=gdb_index"
217 Displays the contents of the .gdb_index and/or .debug_names
218 sections.
219 "i"
221 "=info"
222 Displays the contents of the .debug_info section. Note: the
223 output from this option can also be restricted by the use of
224 the --dwarf-depth and --dwarf-start options.
225 "k"
227 "=links"
228 Displays the contents of the .gnu_debuglink and/or
229 .gnu_debugaltlink sections. Also displays the link to a
230 separate dwarf object file (dwo), if one is specified by the
231 DW_AT_GNU_dwo_name or DW_AT_dwo_name attributes in the
232 .debug_info section.
233 "K"
235 "=follow-links"
236 Display the contents of any selected debug sections that are
237 found in a linked, separate debug info file. This can result
238 in multiple versions of the same debug section being displayed
239 if both the main file and the separate debug info file contain
240 sections with the same name.
241 In addition, when displaying DWARF attributes, if a form is
243 found that references the separate debug info file, then the
244 referenced contents will also be displayed.
245 "l"
247 "=rawline"
248 Displays the contents of the .debug_line section in a raw
249 format.
250 "L"
252 "=decodedline"
253 Displays the interpreted contents of the .debug_line section.
254 "m"
256 "=macro"
257 Displays the contents of the .debug_macro and/or .debug_macinfo
258 sections.
259 "o"
261 "=loc"
262 Displays the contents of the .debug_loc and/or .debug_loclists
263 sections.
264 "p"
266 "=pubnames"
267 Displays the contents of the .debug_pubnames and/or
268 .debug_gnu_pubnames sections.
269 "r"
271 "=aranges"
272 Displays the contents of the .debug_aranges section.
273 "R"
275 "=Ranges"
276 Displays the contents of the .debug_ranges and/or
277 .debug_rnglists sections.
278 "s"
280 "=str"
281 Displays the contents of the .debug_str, .debug_line_str and/or
282 .debug_str_offsets sections.
283 "t"
285 "=pubtype"
286 Displays the contents of the .debug_pubtypes and/or
287 .debug_gnu_pubtypes sections.
288 "T"
290 "=trace_aranges"
291 Displays the contents of the .trace_aranges section.
292 "u"
294 "=trace_abbrev"
295 Displays the contents of the .trace_abbrev section.
296 "U"
298 "=trace_info"
299 Displays the contents of the .trace_info section.
300 Note: displaying the contents of .debug_static_funcs,
302 .debug_static_vars and debug_weaknames sections is not currently
303 supported.
304 --dwarf-depth=n
306 Limit the dump of the ".debug_info" section to n children. This is
307 only useful with --debug-dump=info. The default is to print all
308 DIEs; the special value 0 for n will also have this effect.
309 With a non-zero value for n, DIEs at or deeper than n levels will
311 not be printed. The range for n is zero-based.
312 --dwarf-start=n
314 Print only DIEs beginning with the DIE numbered n. This is only
315 useful with --debug-dump=info.
316 If specified, this option will suppress printing of any header
318 information and all DIEs before the DIE numbered n. Only siblings
319 and children of the specified DIE will be printed.
320 This can be used in conjunction with --dwarf-depth.
322 -I
324 --histogram
325 Display a histogram of bucket list lengths when displaying the
326 contents of the symbol tables.
327 -v
329 --version
330 Display the version number of readelf.
331 -W
333 --wide
334 Don't break output lines to fit into 80 columns. By default readelf
335 breaks section header and segment listing lines for 64-bit ELF
336 files, so that they fit into 80 columns. This option causes readelf
337 to print each section header resp. each segment one a single line,
338 which is far more readable on terminals wider than 80 columns.
339 -H
341 --help
342 Display the command line options understood by readelf.
343 @file
345 Read command-line options from file. The options read are inserted
346 in place of the original @file option. If file does not exist, or
347 cannot be read, then the option will be treated literally, and not
348 removed.
349 Options in file are separated by whitespace. A whitespace
351 character may be included in an option by surrounding the entire
352 option in either single or double quotes. Any character (including
353 a backslash) may be included by prefixing the character to be
354 included with a backslash. The file may itself contain additional
355 @file options; any such options will be processed recursively.
356
358 objdump(1), and the Info entries for binutils.
359
361 Copyright (c) 1991-2018 Free Software Foundation, Inc.
362 Permission is granted to copy, distribute and/or modify this document
364 under the terms of the GNU Free Documentation License, Version 1.3 or
365 any later version published by the Free Software Foundation; with no
366 Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
367 Texts. A copy of the license is included in the section entitled "GNU
368 Free Documentation License".
369binutils-2.30.90 2018-07-09 READELF(1)