1llvm-objdump - LLVM's object file dumper 2======================================== 3 4.. program:: llvm-objdump 5 6SYNOPSIS 7-------- 8 9:program:`llvm-objdump` [*commands*] [*options*] [*filenames...*] 10 11DESCRIPTION 12----------- 13The :program:`llvm-objdump` utility prints the contents of object files and 14final linked images named on the command line. If no file name is specified, 15:program:`llvm-objdump` will attempt to read from *a.out*. If *-* is used as a 16file name, :program:`llvm-objdump` will process a file on its standard input 17stream. 18 19COMMANDS 20-------- 21At least one of the following commands are required, and some commands can be 22combined with other commands: 23 24.. option:: -a, --archive-headers 25 26 Display the information contained within an archive's headers. 27 28.. option:: -d, --disassemble 29 30 Disassemble all executable sections found in the input files. On some 31 architectures (AArch64, PPC64, x86), all known instructions are disassembled by 32 default. On the others, :option:`--mcpu` or :option:`--mattr` is needed to 33 enable some instruction sets. Disabled instructions are displayed as 34 ``<unknown>``. 35 36.. option:: -D, --disassemble-all 37 38 Disassemble all sections found in the input files. 39 40.. option:: --disassemble-symbols=<symbol1[,symbol2,...]> 41 42 Disassemble only the specified symbols. Takes demangled symbol names when 43 :option:`--demangle` is specified, otherwise takes mangled symbol names. 44 Implies :option:`--disassemble`. 45 46.. option:: --dwarf=<value> 47 48 Dump the specified DWARF debug sections. The supported values are: 49 50 `frames` - .debug_frame 51 52.. option:: -f, --file-headers 53 54 Display the contents of the overall file header. 55 56.. option:: --fault-map-section 57 58 Display the content of the fault map section. 59 60.. option:: -h, --headers, --section-headers 61 62 Display summaries of the headers for each section. 63 64.. option:: --help 65 66 Display usage information and exit. Does not stack with other commands. 67 68.. option:: -p, --private-headers 69 70 Display format-specific file headers. 71 72.. option:: -r, --reloc 73 74 Display the relocation entries in the file. 75 76.. option:: -R, --dynamic-reloc 77 78 Display the dynamic relocation entries in the file. 79 80.. option:: --raw-clang-ast 81 82 Dump the raw binary contents of the clang AST section. 83 84.. option:: -s, --full-contents 85 86 Display the contents of each section. 87 88.. option:: -t, --syms 89 90 Display the symbol table. 91 92.. option:: -T, --dynamic-syms 93 94 Display the contents of the dynamic symbol table. 95 96.. option:: -u, --unwind-info 97 98 Display the unwind info of the input(s). 99 100 This operation is only currently supported for COFF and Mach-O object files. 101 102.. option:: -v, --version 103 104 Display the version of the :program:`llvm-objdump` executable. Does not stack 105 with other commands. 106 107.. option:: -x, --all-headers 108 109 Display all available header information. Equivalent to specifying 110 :option:`--archive-headers`, :option:`--file-headers`, 111 :option:`--private-headers`, :option:`--reloc`, :option:`--section-headers`, 112 and :option:`--syms`. 113 114OPTIONS 115------- 116:program:`llvm-objdump` supports the following options: 117 118.. option:: --adjust-vma=<offset> 119 120 Increase the displayed address in disassembly or section header printing by 121 the specified offset. 122 123.. option:: --arch-name=<string> 124 125 Specify the target architecture when disassembling. Use :option:`--version` 126 for a list of available targets. 127 128.. option:: -C, --demangle 129 130 Demangle symbol names in the output. 131 132.. option:: --debug-file-directory <path> 133 134 Provide a path to a directory with a `.build-id` subdirectory to search for 135 debug information for stripped binaries. Multiple instances of this argument 136 are searched in the order given. 137 138.. option:: --debuginfod, --no-debuginfod 139 140 Whether or not to try debuginfod lookups for debug binaries. Unless specified, 141 debuginfod is only enabled if libcurl was compiled in (``LLVM_ENABLE_CURL``) 142 and at least one server URL was provided by the environment variable 143 ``DEBUGINFOD_URLS``. 144 145.. option:: --debug-vars=<format> 146 147 Print the locations (in registers or memory) of source-level variables 148 alongside disassembly. ``format`` may be ``unicode`` or ``ascii``, defaulting 149 to ``unicode`` if omitted. 150 151.. option:: --debug-vars-indent=<width> 152 153 Distance to indent the source-level variable display, relative to the start 154 of the disassembly. Defaults to 52 characters. 155 156.. option:: -j, --section=<section1[,section2,...]> 157 158 Perform commands on the specified sections only. For Mach-O use 159 `segment,section` to specify the section name. 160 161.. option:: -l, --line-numbers 162 163 When disassembling, display source line numbers. Implies 164 :option:`--disassemble`. 165 166.. option:: -M, --disassembler-options=<opt1[,opt2,...]> 167 168 Pass target-specific disassembler options. Available options: 169 170 * ``reg-names-std``: ARM only (default). Print in ARM 's instruction set documentation, with r13/r14/r15 replaced by sp/lr/pc. 171 * ``reg-names-raw``: ARM only. Use r followed by the register number. 172 * ``no-aliases``: AArch64 and RISC-V only. Print raw instruction mnemonic instead of pseudo instruction mnemonic. 173 * ``numeric``: RISC-V only. Print raw register names instead of ABI mnemonic. (e.g. print x1 instead of ra) 174 * ``att``: x86 only (default). Print in the AT&T syntax. 175 * ``intel``: x86 only. Print in the intel syntax. 176 177.. option:: --mcpu=<cpu-name> 178 179 Target a specific CPU type for disassembly. Specify ``--mcpu=help`` to display 180 available CPUs. 181 182.. option:: --mattr=<a1,+a2,-a3,...> 183 184 Enable/disable target-specific attributes. Specify ``--mattr=help`` to display 185 the available attributes. 186 187.. option:: --no-leading-addr 188 189 When disassembling, do not print leading addresses for instructions or inline 190 relocations. 191 192.. option:: --no-print-imm-hex 193 194 Do not use hex format for immediate values in disassembly output (default). 195 196.. option:: --no-show-raw-insn 197 198 When disassembling, do not print the raw bytes of each instruction. 199 200.. option:: --offloading 201 202 Display the content of the LLVM offloading section. 203 204.. option:: --prefix=<prefix> 205 206 When disassembling with the :option:`--source` option, prepend ``prefix`` to 207 absolute paths. 208 209.. option:: --prefix-strip=<level> 210 211 When disassembling with the :option:`--source` option, strip out ``level`` 212 initial directories from absolute paths. This option has no effect without 213 :option:`--prefix`. 214 215.. option:: --print-imm-hex 216 217 Use hex format when printing immediate values in disassembly output. 218 219.. option:: -S, --source 220 221 When disassembling, display source interleaved with the disassembly. Implies 222 :option:`--disassemble`. 223 224.. option:: --show-lma 225 226 Display the LMA column when dumping ELF section headers. Defaults to off 227 unless any section has different VMA and LMAs. 228 229.. option:: --start-address=<address> 230 231 When disassembling, only disassemble from the specified address. 232 233 When printing relocations, only print the relocations patching offsets from at least ``address``. 234 235 When printing symbols, only print symbols with a value of at least ``address``. 236 237.. option:: --stop-address=<address> 238 239 When disassembling, only disassemble up to, but not including the specified address. 240 241 When printing relocations, only print the relocations patching offsets up to ``address``. 242 243 When printing symbols, only print symbols with a value up to ``address``. 244 245.. option:: --symbolize-operands 246 247 When disassembling, symbolize a branch target operand to print a label instead of a real address. 248 249 When printing a PC-relative global symbol reference, print it as an offset from the leading symbol. 250 251 When a bb-address-map section is present (i.e., the object file is built with ``-fbasic-block-sections=labels``), labels are retrieved from that section instead. 252 253 Only works with PowerPC objects or X86 linked images. 254 255 Example: 256 A non-symbolized branch instruction with a local target and pc-relative memory access like 257 258 .. code-block:: none 259 260 cmp eax, dword ptr [rip + 4112] 261 jge 0x20117e <_start+0x25> 262 263 might become 264 265 .. code-block:: none 266 267 <L0>: 268 cmp eax, dword ptr <g> 269 jge <L0> 270 271.. option:: --triple=<string> 272 273 Target triple to disassemble for, see ``--version`` for available targets. 274 275.. option:: -w, --wide 276 277 Ignored for compatibility with GNU objdump. 278 279.. option:: --x86-asm-syntax=<style> 280 281 Deprecated. 282 When used with :option:`--disassemble`, choose style of code to emit from 283 X86 backend. Supported values are: 284 285 .. option:: att 286 287 AT&T-style assembly 288 289 .. option:: intel 290 291 Intel-style assembly 292 293 294 The default disassembly style is **att**. 295 296.. option:: -z, --disassemble-zeroes 297 298 Do not skip blocks of zeroes when disassembling. 299 300.. option:: @<FILE> 301 302 Read command-line options and commands from response file `<FILE>`. 303 304MACH-O ONLY OPTIONS AND COMMANDS 305-------------------------------- 306 307.. option:: --arch=<architecture> 308 309 Specify the architecture to disassemble. see ``--version`` for available 310 architectures. 311 312.. option:: --archive-member-offsets 313 314 Print the offset to each archive member for Mach-O archives (requires 315 :option:`--archive-headers`). 316 317.. option:: --bind 318 319 Display binding info 320 321.. option:: --data-in-code 322 323 Display the data in code table. 324 325.. option:: --dis-symname=<name> 326 327 Disassemble just the specified symbol's instructions. 328 329.. option:: --chained-fixups 330 331 Print chained fixup information. 332 333.. option:: --dyld-info 334 335 Print bind and rebase information used by dyld to resolve external 336 references in a final linked binary. 337 338.. option:: --dylibs-used 339 340 Display the shared libraries used for linked files. 341 342.. option:: --dsym=<string> 343 344 Use .dSYM file for debug info. 345 346.. option:: --dylib-id 347 348 Display the shared library's ID for dylib files. 349 350.. option:: --exports-trie 351 352 Display exported symbols. 353 354.. option:: --function-starts 355 356 Print the function starts table for Mach-O objects. 357 358.. option:: -g 359 360 Print line information from debug info if available. 361 362.. option:: --full-leading-addr 363 364 Print the full leading address when disassembling. 365 366.. option:: --indirect-symbols 367 368 Display the indirect symbol table. 369 370.. option:: --info-plist 371 372 Display the info plist section as strings. 373 374.. option:: --lazy-bind 375 376 Display lazy binding info. 377 378.. option:: --link-opt-hints 379 380 Display the linker optimization hints. 381 382.. option:: -m, --macho 383 384 Use Mach-O specific object file parser. Commands and other options may behave 385 differently when used with ``--macho``. 386 387.. option:: --no-leading-headers 388 389 Do not print any leading headers. 390 391.. option:: --no-symbolic-operands 392 393 Do not print symbolic operands when disassembling. 394 395.. option:: --non-verbose 396 397 Display the information for Mach-O objects in non-verbose or numeric form. 398 399.. option:: --objc-meta-data 400 401 Display the Objective-C runtime meta data. 402 403.. option:: --private-header 404 405 Display only the first format specific file header. 406 407.. option:: --rebase 408 409 Display rebasing information. 410 411.. option:: --rpaths 412 413 Display runtime search paths for the binary. 414 415.. option:: --universal-headers 416 417 Display universal headers. 418 419.. option:: --weak-bind 420 421 Display weak binding information. 422 423XCOFF ONLY OPTIONS AND COMMANDS 424--------------------------------- 425 426.. option:: --symbol-description 427 428 Add symbol description to disassembly output. 429 430BUGS 431---- 432 433To report bugs, please visit <https://github.com/llvm/llvm-project/labels/tools:llvm-objdump/>. 434 435SEE ALSO 436-------- 437 438:manpage:`llvm-nm(1)`, :manpage:`llvm-otool(1)`, :manpage:`llvm-readelf(1)`, 439:manpage:`llvm-readobj(1)` 440