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. 190 191.. option:: --no-print-imm-hex 192 193 Do not use hex format for immediate values in disassembly output (default). 194 195.. option:: --no-show-raw-insn 196 197 When disassembling, do not print the raw bytes of each instruction. 198 199.. option:: --offloading 200 201 Display the content of the LLVM offloading section. 202 203.. option:: --prefix=<prefix> 204 205 When disassembling with the :option:`--source` option, prepend ``prefix`` to 206 absolute paths. 207 208.. option:: --prefix-strip=<level> 209 210 When disassembling with the :option:`--source` option, strip out ``level`` 211 initial directories from absolute paths. This option has no effect without 212 :option:`--prefix`. 213 214.. option:: --print-imm-hex 215 216 Use hex format when printing immediate values in disassembly output. 217 218.. option:: -S, --source 219 220 When disassembling, display source interleaved with the disassembly. Implies 221 :option:`--disassemble`. 222 223.. option:: --show-lma 224 225 Display the LMA column when dumping ELF section headers. Defaults to off 226 unless any section has different VMA and LMAs. 227 228.. option:: --start-address=<address> 229 230 When disassembling, only disassemble from the specified address. 231 232 When printing relocations, only print the relocations patching offsets from at least ``address``. 233 234 When printing symbols, only print symbols with a value of at least ``address``. 235 236.. option:: --stop-address=<address> 237 238 When disassembling, only disassemble up to, but not including the specified address. 239 240 When printing relocations, only print the relocations patching offsets up to ``address``. 241 242 When printing symbols, only print symbols with a value up to ``address``. 243 244.. option:: --symbolize-operands 245 246 When disassembling, symbolize a branch target operand to print a label instead of a real address. 247 248 When printing a PC-relative global symbol reference, print it as an offset from the leading symbol. 249 250 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. 251 252 Only works with PowerPC objects or X86 linked images. 253 254 Example: 255 A non-symbolized branch instruction with a local target and pc-relative memory access like 256 257 .. code-block:: none 258 259 cmp eax, dword ptr [rip + 4112] 260 jge 0x20117e <_start+0x25> 261 262 might become 263 264 .. code-block:: none 265 266 <L0>: 267 cmp eax, dword ptr <g> 268 jge <L0> 269 270.. option:: --triple=<string> 271 272 Target triple to disassemble for, see ``--version`` for available targets. 273 274.. option:: -w, --wide 275 276 Ignored for compatibility with GNU objdump. 277 278.. option:: --x86-asm-syntax=<style> 279 280 Deprecated. 281 When used with :option:`--disassemble`, choose style of code to emit from 282 X86 backend. Supported values are: 283 284 .. option:: att 285 286 AT&T-style assembly 287 288 .. option:: intel 289 290 Intel-style assembly 291 292 293 The default disassembly style is **att**. 294 295.. option:: -z, --disassemble-zeroes 296 297 Do not skip blocks of zeroes when disassembling. 298 299.. option:: @<FILE> 300 301 Read command-line options and commands from response file `<FILE>`. 302 303MACH-O ONLY OPTIONS AND COMMANDS 304-------------------------------- 305 306.. option:: --arch=<architecture> 307 308 Specify the architecture to disassemble. see ``--version`` for available 309 architectures. 310 311.. option:: --archive-member-offsets 312 313 Print the offset to each archive member for Mach-O archives (requires 314 :option:`--archive-headers`). 315 316.. option:: --bind 317 318 Display binding info 319 320.. option:: --data-in-code 321 322 Display the data in code table. 323 324.. option:: --dis-symname=<name> 325 326 Disassemble just the specified symbol's instructions. 327 328.. option:: --chained-fixups 329 330 Print chained fixup information. 331 332.. option:: --dyld-info 333 334 Print bind and rebase information used by dyld to resolve external 335 references in a final linked binary. 336 337.. option:: --dylibs-used 338 339 Display the shared libraries used for linked files. 340 341.. option:: --dsym=<string> 342 343 Use .dSYM file for debug info. 344 345.. option:: --dylib-id 346 347 Display the shared library's ID for dylib files. 348 349.. option:: --exports-trie 350 351 Display exported symbols. 352 353.. option:: --function-starts 354 355 Print the function starts table for Mach-O objects. 356 357.. option:: -g 358 359 Print line information from debug info if available. 360 361.. option:: --full-leading-addr 362 363 Print the full leading address when disassembling. 364 365.. option:: --indirect-symbols 366 367 Display the indirect symbol table. 368 369.. option:: --info-plist 370 371 Display the info plist section as strings. 372 373.. option:: --lazy-bind 374 375 Display lazy binding info. 376 377.. option:: --link-opt-hints 378 379 Display the linker optimization hints. 380 381.. option:: -m, --macho 382 383 Use Mach-O specific object file parser. Commands and other options may behave 384 differently when used with ``--macho``. 385 386.. option:: --no-leading-headers 387 388 Do not print any leading headers. 389 390.. option:: --no-symbolic-operands 391 392 Do not print symbolic operands when disassembling. 393 394.. option:: --non-verbose 395 396 Display the information for Mach-O objects in non-verbose or numeric form. 397 398.. option:: --objc-meta-data 399 400 Display the Objective-C runtime meta data. 401 402.. option:: --private-header 403 404 Display only the first format specific file header. 405 406.. option:: --rebase 407 408 Display rebasing information. 409 410.. option:: --rpaths 411 412 Display runtime search paths for the binary. 413 414.. option:: --universal-headers 415 416 Display universal headers. 417 418.. option:: --weak-bind 419 420 Display weak binding information. 421 422XCOFF ONLY OPTIONS AND COMMANDS 423--------------------------------- 424 425.. option:: --symbol-description 426 427 Add symbol description to disassembly output. 428 429BUGS 430---- 431 432To report bugs, please visit <https://github.com/llvm/llvm-project/labels/tools:llvm-objdump/>. 433 434SEE ALSO 435-------- 436 437:manpage:`llvm-nm(1)`, :manpage:`llvm-otool(1)`, :manpage:`llvm-readelf(1)`, 438:manpage:`llvm-readobj(1)` 439