1llvm-readobj - LLVM Object Reader 2================================= 3 4.. program:: llvm-readobj 5 6SYNOPSIS 7-------- 8 9:program:`llvm-readobj` [*options*] [*input...*] 10 11DESCRIPTION 12----------- 13 14The :program:`llvm-readobj` tool displays low-level format-specific information 15about one or more object files. 16 17If ``input`` is "``-``", :program:`llvm-readobj` reads from standard 18input. Otherwise, it will read from the specified ``filenames``. 19 20DIFFERENCES TO LLVM-READELF 21--------------------------- 22 23:program:`llvm-readelf` is an alias for the :manpage:`llvm-readobj` tool with a 24slightly different command-line interface and output that is GNU compatible. 25Following is a list of differences between :program:`llvm-readelf` and 26:program:`llvm-readobj`: 27 28- :program:`llvm-readelf` uses `GNU` for the :option:`--elf-output-style` option 29 by default. :program:`llvm-readobj` uses `LLVM`. 30- :program:`llvm-readelf` allows single-letter grouped flags (e.g. 31 ``llvm-readelf -SW`` is the same as ``llvm-readelf -S -W``). 32 :program:`llvm-readobj` does not allow grouping. 33- :program:`llvm-readelf` provides :option:`-s` as an alias for 34 :option:`--symbols`, for GNU :program:`readelf` compatibility, whereas it is 35 an alias for :option:`--section-headers` in :program:`llvm-readobj`. 36- :program:`llvm-readobj` provides ``-t`` as an alias for :option:`--symbols`. 37 :program:`llvm-readelf` does not. 38- :program:`llvm-readobj` provides ``--sr``, ``--sd``, ``--st`` and ``--dt`` as 39 aliases for :option:`--section-relocations`, :option:`--section-data`, 40 :option:`--section-symbols` and :option:`--dyn-symbols` respectively. 41 :program:`llvm-readelf` does not provide these aliases, to avoid conflicting 42 with grouped flags. 43 44GENERAL AND MULTI-FORMAT OPTIONS 45-------------------------------- 46 47These options are applicable to more than one file format, or are unrelated to 48file formats. 49 50.. option:: --all 51 52 Equivalent to specifying all the main display options relevant to the file 53 format. 54 55.. option:: --addrsig 56 57 Display the address-significance table. 58 59.. option:: --expand-relocs 60 61 When used with :option:`--relocs`, display each relocation in an expanded 62 multi-line format. 63 64.. option:: --file-header, -h 65 66 Display file headers. 67 68.. option:: --headers, -e 69 70 Equivalent to setting: :option:`--file-header`, :option:`--program-headers`, 71 and :option:`--sections`. 72 73.. option:: --help 74 75 Display a summary of command line options. 76 77.. option:: --hex-dump=<section[,section,...]>, -x 78 79 Display the specified section(s) as hexadecimal bytes. ``section`` may be a 80 section index or section name. 81 82.. option:: --needed-libs 83 84 Display the needed libraries. 85 86.. option:: --relocations, --relocs, -r 87 88 Display the relocation entries in the file. 89 90.. option:: --sections, --section-headers, -S 91 92 Display all sections. 93 94.. option:: --section-data, --sd 95 96 When used with :option:`--sections`, display section data for each section 97 shown. This option has no effect for GNU style output. 98 99.. option:: --section-relocations, --sr 100 101 When used with :option:`--sections`, display relocations for each section 102 shown. This option has no effect for GNU style output. 103 104.. option:: --section-symbols, --st 105 106 When used with :option:`--sections`, display symbols for each section shown. 107 This option has no effect for GNU style output. 108 109.. option:: --stackmap 110 111 Display contents of the stackmap section. 112 113.. option:: --string-dump=<section[,section,...]>, -p 114 115 Display the specified section(s) as a list of strings. ``section`` may be a 116 section index or section name. 117 118.. option:: --string-table 119 120 Display contents of the string table. 121 122.. option:: --symbols, --syms, -s 123 124 Display the symbol table. 125 126.. option:: --unwind, -u 127 128 Display unwind information. 129 130.. option:: --version 131 132 Display the version of the :program:`llvm-readobj` executable. 133 134.. option:: @<FILE> 135 136 Read command-line options from response file `<FILE>`. 137 138ELF SPECIFIC OPTIONS 139-------------------- 140 141The following options are implemented only for the ELF file format. 142 143.. option:: --arch-specific, -A 144 145 Display architecture-specific information, e.g. the ARM attributes section on ARM. 146 147.. option:: --bb-addr-map 148 149 Display the contents of the basic block address map section(s), which contain the 150 address of each function, along with the relative offset of each basic block. 151 152.. option:: --demangle, -C 153 154 Display demangled symbol names in the output. 155 156.. option:: --dependent-libraries 157 158 Display the dependent libraries section. 159 160.. option:: --dyn-relocations 161 162 Display the dynamic relocation entries. 163 164.. option:: --dyn-symbols, --dyn-syms, --dt 165 166 Display the dynamic symbol table. 167 168.. option:: --dynamic-table, --dynamic, -d 169 170 Display the dynamic table. 171 172.. option:: --cg-profile 173 174 Display the callgraph profile section. 175 176.. option:: --histogram, -I 177 178 Display a bucket list histogram for dynamic symbol hash tables. 179 180.. option:: --elf-linker-options 181 182 Display the linker options section. 183 184.. option:: --elf-output-style=<value> 185 186 Format ELF information in the specified style. Valid options are ``LLVM`` and 187 ``GNU``. ``LLVM`` output (the default) is an expanded and structured format, 188 whilst ``GNU`` output mimics the equivalent GNU :program:`readelf` output. 189 190.. option:: --section-groups, -g 191 192 Display section groups. 193 194.. option:: --gnu-hash-table 195 196 Display the GNU hash table for dynamic symbols. 197 198.. option:: --hash-symbols 199 200 Display the expanded hash table with dynamic symbol data. 201 202.. option:: --hash-table 203 204 Display the hash table for dynamic symbols. 205 206.. option:: --notes, -n 207 208 Display all notes. 209 210.. option:: --program-headers, --segments, -l 211 212 Display the program headers. 213 214.. option:: --raw-relr 215 216 Do not decode relocations in RELR relocation sections when displaying them. 217 218.. option:: --section-mapping 219 220 Display the section to segment mapping. 221 222.. option:: --stack-sizes 223 224 Display the contents of the stack sizes section(s), i.e. pairs of function 225 names and the size of their stack frames. Currently only implemented for GNU 226 style output. 227 228.. option:: --version-info, -V 229 230 Display version sections. 231 232MACH-O SPECIFIC OPTIONS 233----------------------- 234 235The following options are implemented only for the Mach-O file format. 236 237.. option:: --macho-data-in-code 238 239 Display the Data in Code command. 240 241.. option:: --macho-dsymtab 242 243 Display the Dsymtab command. 244 245.. option:: --macho-indirect-symbols 246 247 Display indirect symbols. 248 249.. option:: --macho-linker-options 250 251 Display the Mach-O-specific linker options. 252 253.. option:: --macho-segment 254 255 Display the Segment command. 256 257.. option:: --macho-version-min 258 259 Display the version min command. 260 261PE/COFF SPECIFIC OPTIONS 262------------------------ 263 264The following options are implemented only for the PE/COFF file format. 265 266.. option:: --codeview 267 268 Display CodeView debug information. 269 270.. option:: --codeview-ghash 271 272 Enable global hashing for CodeView type stream de-duplication. 273 274.. option:: --codeview-merged-types 275 276 Display the merged CodeView type stream. 277 278.. option:: --codeview-subsection-bytes 279 280 Dump raw contents of CodeView debug sections and records. 281 282.. option:: --coff-basereloc 283 284 Display the .reloc section. 285 286.. option:: --coff-debug-directory 287 288 Display the debug directory. 289 290.. option:: --coff-tls-directory 291 292 Display the TLS directory. 293 294.. option:: --coff-directives 295 296 Display the .drectve section. 297 298.. option:: --coff-exports 299 300 Display the export table. 301 302.. option:: --coff-imports 303 304 Display the import table. 305 306.. option:: --coff-load-config 307 308 Display the load config. 309 310.. option:: --coff-resources 311 312 Display the .rsrc section. 313 314XCOFF SPECIFIC OPTIONS 315---------------------- 316 317The following options are implemented only for the XCOFF file format. 318 319.. option:: --auxiliary-header 320 321 Display XCOFF Auxiliary header. 322 323EXIT STATUS 324----------- 325 326:program:`llvm-readobj` returns 0 under normal operation. It returns a non-zero 327exit code if there were any errors. 328 329SEE ALSO 330-------- 331 332:manpage:`llvm-nm(1)`, :manpage:`llvm-objdump(1)`, :manpage:`llvm-readelf(1)` 333