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. If
127 support is not yet implemented for your architecture you could try
128 dumping the contents of the .eh_frames section using the
129 --debug-dump=frames or --debug-dump=frames-interp options.
130 -d
132 --dynamic
133 Displays the contents of the file's dynamic section, if it has one.
134 -V
136 --version-info
137 Displays the contents of the version sections in the file, it they
138 exist.
139 -A
141 --arch-specific
142 Displays architecture-specific information in the file, if there is
143 any.
144 -D
146 --use-dynamic
147 When displaying symbols, this option makes readelf use the symbol
148 hash tables in the file's dynamic section, rather than the symbol
149 table sections.
150 When displaying relocations, this option makes readelf display the
152 dynamic relocations rather than the static relocations.
153 -x <number or name>
155 --hex-dump=<number or name>
156 Displays the contents of the indicated section as a hexadecimal
157 bytes. A number identifies a particular section by index in the
158 section table; any other string identifies all sections with that
159 name in the object file.
160 -R <number or name>
162 --relocated-dump=<number or name>
163 Displays the contents of the indicated section as a hexadecimal
164 bytes. A number identifies a particular section by index in the
165 section table; any other string identifies all sections with that
166 name in the object file. The contents of the section will be
167 relocated before they are displayed.
168 -p <number or name>
170 --string-dump=<number or name>
171 Displays the contents of the indicated section as printable
172 strings. A number identifies a particular section by index in the
173 section table; any other string identifies all sections with that
174 name in the object file.
175 -z
177 --decompress
178 Requests that the section(s) being dumped by x, R or p options are
179 decompressed before being displayed. If the section(s) are not
180 compressed then they are displayed as is.
181 -c
183 --archive-index
184 Displays the file symbol index information contained in the header
185 part of binary archives. Performs the same function as the t
186 command to ar, but without using the BFD library.
187 -w[lLiaprmfFsoRtUuTgAckK]
189 --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]
190 Displays the contents of the DWARF debug sections in the file, if
191 any are present. Compressed debug sections are automatically
192 decompressed (temporarily) before they are displayed. If one or
193 more of the optional letters or words follows the switch then only
194 those type(s) of data will be dumped. The letters and words refer
195 to the following information:
196 "a"
198 "=abbrev"
199 Displays the contents of the .debug_abbrev section.
200 "A"
202 "=addr"
203 Displays the contents of the .debug_addr section.
204 "c"
206 "=cu_index"
207 Displays the contents of the .debug_cu_index and/or
208 .debug_tu_index sections.
209 "f"
211 "=frames"
212 Display the raw contents of a .debug_frame section.
213 "F"
215 "=frame-interp"
216 Display the interpreted contents of a .debug_frame section.
217 "g"
219 "=gdb_index"
220 Displays the contents of the .gdb_index and/or .debug_names
221 sections.
222 "i"
224 "=info"
225 Displays the contents of the .debug_info section. Note: the
226 output from this option can also be restricted by the use of
227 the --dwarf-depth and --dwarf-start options.
228 "k"
230 "=links"
231 Displays the contents of the .gnu_debuglink and/or
232 .gnu_debugaltlink sections. Also displays the link to a
233 separate dwarf object file (dwo), if one is specified by the
234 DW_AT_GNU_dwo_name or DW_AT_dwo_name attributes in the
235 .debug_info section.
236 "K"
238 "=follow-links"
239 Display the contents of any selected debug sections that are
240 found in a linked, separate debug info file. This can result
241 in multiple versions of the same debug section being displayed
242 if both the main file and the separate debug info file contain
243 sections with the same name.
244 In addition, when displaying DWARF attributes, if a form is
246 found that references the separate debug info file, then the
247 referenced contents will also be displayed.
248 "l"
250 "=rawline"
251 Displays the contents of the .debug_line section in a raw
252 format.
253 "L"
255 "=decodedline"
256 Displays the interpreted contents of the .debug_line section.
257 "m"
259 "=macro"
260 Displays the contents of the .debug_macro and/or .debug_macinfo
261 sections.
262 "o"
264 "=loc"
265 Displays the contents of the .debug_loc and/or .debug_loclists
266 sections.
267 "p"
269 "=pubnames"
270 Displays the contents of the .debug_pubnames and/or
271 .debug_gnu_pubnames sections.
272 "r"
274 "=aranges"
275 Displays the contents of the .debug_aranges section.
276 "R"
278 "=Ranges"
279 Displays the contents of the .debug_ranges and/or
280 .debug_rnglists sections.
281 "s"
283 "=str"
284 Displays the contents of the .debug_str, .debug_line_str and/or
285 .debug_str_offsets sections.
286 "t"
288 "=pubtype"
289 Displays the contents of the .debug_pubtypes and/or
290 .debug_gnu_pubtypes sections.
291 "T"
293 "=trace_aranges"
294 Displays the contents of the .trace_aranges section.
295 "u"
297 "=trace_abbrev"
298 Displays the contents of the .trace_abbrev section.
299 "U"
301 "=trace_info"
302 Displays the contents of the .trace_info section.
303 Note: displaying the contents of .debug_static_funcs,
305 .debug_static_vars and debug_weaknames sections is not currently
306 supported.
307 --dwarf-depth=n
309 Limit the dump of the ".debug_info" section to n children. This is
310 only useful with --debug-dump=info. The default is to print all
311 DIEs; the special value 0 for n will also have this effect.
312 With a non-zero value for n, DIEs at or deeper than n levels will
314 not be printed. The range for n is zero-based.
315 --dwarf-start=n
317 Print only DIEs beginning with the DIE numbered n. This is only
318 useful with --debug-dump=info.
319 If specified, this option will suppress printing of any header
321 information and all DIEs before the DIE numbered n. Only siblings
322 and children of the specified DIE will be printed.
323 This can be used in conjunction with --dwarf-depth.
325 -I
327 --histogram
328 Display a histogram of bucket list lengths when displaying the
329 contents of the symbol tables.
330 -v
332 --version
333 Display the version number of readelf.
334 -W
336 --wide
337 Don't break output lines to fit into 80 columns. By default readelf
338 breaks section header and segment listing lines for 64-bit ELF
339 files, so that they fit into 80 columns. This option causes readelf
340 to print each section header resp. each segment one a single line,
341 which is far more readable on terminals wider than 80 columns.
342 -H
344 --help
345 Display the command-line options understood by readelf.
346 @file
348 Read command-line options from file. The options read are inserted
349 in place of the original @file option. If file does not exist, or
350 cannot be read, then the option will be treated literally, and not
351 removed.
352 Options in file are separated by whitespace. A whitespace
354 character may be included in an option by surrounding the entire
355 option in either single or double quotes. Any character (including
356 a backslash) may be included by prefixing the character to be
357 included with a backslash. The file may itself contain additional
358 @file options; any such options will be processed recursively.
359
361 objdump(1), and the Info entries for binutils.
362
364 Copyright (c) 1991-2019 Free Software Foundation, Inc.
365 Permission is granted to copy, distribute and/or modify this document
367 under the terms of the GNU Free Documentation License, Version 1.3 or
368 any later version published by the Free Software Foundation; with no
369 Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
370 Texts. A copy of the license is included in the section entitled "GNU
371 Free Documentation License".
372binutils-2.31.90 2019-01-19 READELF(1)