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:: --build-id=<string> 129 130 Look up the object using the given build ID, specified as a hexadecimal 131 string. The found object is handled as if it were an input filename. 132 133.. option:: -C, --demangle 134 135 Demangle symbol names in the output. 136 137.. option:: --debug-file-directory <path> 138 139 Provide a path to a directory with a `.build-id` subdirectory to search for 140 debug information for stripped binaries. Multiple instances of this argument 141 are searched in the order given. 142 143.. option:: --debuginfod, --no-debuginfod 144 145 Whether or not to try debuginfod lookups for debug binaries. Unless specified, 146 debuginfod is only enabled if libcurl was compiled in (``LLVM_ENABLE_CURL``) 147 and at least one server URL was provided by the environment variable 148 ``DEBUGINFOD_URLS``. 149 150.. option:: --debug-vars=<format> 151 152 Print the locations (in registers or memory) of source-level variables 153 alongside disassembly. ``format`` may be ``unicode`` or ``ascii``, defaulting 154 to ``unicode`` if omitted. 155 156.. option:: --debug-vars-indent=<width> 157 158 Distance to indent the source-level variable display, relative to the start 159 of the disassembly. Defaults to 52 characters. 160 161.. option:: -j, --section=<section1[,section2,...]> 162 163 Perform commands on the specified sections only. For Mach-O use 164 `segment,section` to specify the section name. 165 166.. option:: -l, --line-numbers 167 168 When disassembling, display source line numbers. Implies 169 :option:`--disassemble`. 170 171.. option:: -M, --disassembler-options=<opt1[,opt2,...]> 172 173 Pass target-specific disassembler options. Available options: 174 175 * ``reg-names-std``: ARM only (default). Print in ARM 's instruction set documentation, with r13/r14/r15 replaced by sp/lr/pc. 176 * ``reg-names-raw``: ARM only. Use r followed by the register number. 177 * ``no-aliases``: AArch64 and RISC-V only. Print raw instruction mnemonic instead of pseudo instruction mnemonic. 178 * ``numeric``: RISC-V only. Print raw register names instead of ABI mnemonic. (e.g. print x1 instead of ra) 179 * ``att``: x86 only (default). Print in the AT&T syntax. 180 * ``intel``: x86 only. Print in the intel syntax. 181 182.. option:: --mcpu=<cpu-name> 183 184 Target a specific CPU type for disassembly. Specify ``--mcpu=help`` to display 185 available CPUs. 186 187.. option:: --mattr=<a1,+a2,-a3,...> 188 189 Enable/disable target-specific attributes. Specify ``--mattr=help`` to display 190 the available attributes. 191 192.. option:: --no-leading-addr, --no-addresses 193 194 When disassembling, do not print leading addresses for instructions or inline 195 relocations. 196 197.. option:: --no-print-imm-hex 198 199 Do not use hex format for immediate values in disassembly output. 200 201.. option:: --no-show-raw-insn 202 203 When disassembling, do not print the raw bytes of each instruction. 204 205.. option:: --offloading 206 207 Display the content of the LLVM offloading section. 208 209.. option:: --prefix=<prefix> 210 211 When disassembling with the :option:`--source` option, prepend ``prefix`` to 212 absolute paths. 213 214.. option:: --prefix-strip=<level> 215 216 When disassembling with the :option:`--source` option, strip out ``level`` 217 initial directories from absolute paths. This option has no effect without 218 :option:`--prefix`. 219 220.. option:: --print-imm-hex 221 222 Use hex format when printing immediate values in disassembly output (default). 223 224.. option:: -S, --source 225 226 When disassembling, display source interleaved with the disassembly. Implies 227 :option:`--disassemble`. 228 229.. option:: --show-lma 230 231 Display the LMA column when dumping ELF section headers. Defaults to off 232 unless any section has different VMA and LMAs. 233 234.. option:: --start-address=<address> 235 236 When disassembling, only disassemble from the specified address. 237 238 When printing relocations, only print the relocations patching offsets from at least ``address``. 239 240 When printing symbols, only print symbols with a value of at least ``address``. 241 242.. option:: --stop-address=<address> 243 244 When disassembling, only disassemble up to, but not including the specified address. 245 246 When printing relocations, only print the relocations patching offsets up to ``address``. 247 248 When printing symbols, only print symbols with a value up to ``address``. 249 250.. option:: --symbolize-operands 251 252 When disassembling, symbolize a branch target operand to print a label instead of a real address. 253 254 When printing a PC-relative global symbol reference, print it as an offset from the leading symbol. 255 256 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. 257 258 Only works with PowerPC objects or X86 linked images. 259 260 Example: 261 A non-symbolized branch instruction with a local target and pc-relative memory access like 262 263 .. code-block:: none 264 265 cmp eax, dword ptr [rip + 4112] 266 jge 0x20117e <_start+0x25> 267 268 might become 269 270 .. code-block:: none 271 272 <L0>: 273 cmp eax, dword ptr <g> 274 jge <L0> 275 276.. option:: --triple=<string> 277 278 Target triple to disassemble for, see ``--version`` for available targets. 279 280.. option:: -w, --wide 281 282 Ignored for compatibility with GNU objdump. 283 284.. option:: --x86-asm-syntax=<style> 285 286 Deprecated. 287 When used with :option:`--disassemble`, choose style of code to emit from 288 X86 backend. Supported values are: 289 290 .. option:: att 291 292 AT&T-style assembly 293 294 .. option:: intel 295 296 Intel-style assembly 297 298 299 The default disassembly style is **att**. 300 301.. option:: -z, --disassemble-zeroes 302 303 Do not skip blocks of zeroes when disassembling. 304 305.. option:: @<FILE> 306 307 Read command-line options and commands from response file `<FILE>`. 308 309MACH-O ONLY OPTIONS AND COMMANDS 310-------------------------------- 311 312.. option:: --arch=<architecture> 313 314 Specify the architecture to disassemble. see ``--version`` for available 315 architectures. 316 317.. option:: --archive-member-offsets 318 319 Print the offset to each archive member for Mach-O archives (requires 320 :option:`--archive-headers`). 321 322.. option:: --bind 323 324 Display binding info 325 326.. option:: --data-in-code 327 328 Display the data in code table. 329 330.. option:: --dis-symname=<name> 331 332 Disassemble just the specified symbol's instructions. 333 334.. option:: --chained-fixups 335 336 Print chained fixup information. 337 338.. option:: --dyld-info 339 340 Print bind and rebase information used by dyld to resolve external 341 references in a final linked binary. 342 343.. option:: --dylibs-used 344 345 Display the shared libraries used for linked files. 346 347.. option:: --dsym=<string> 348 349 Use .dSYM file for debug info. 350 351.. option:: --dylib-id 352 353 Display the shared library's ID for dylib files. 354 355.. option:: --exports-trie 356 357 Display exported symbols. 358 359.. option:: --function-starts [=<addrs|names|both>] 360 361 Print the function starts table for Mach-O objects. Either ``addrs`` 362 (default) to print only the addresses of functions, ``names`` to print only 363 the names of the functions (when available), or ``both`` to print the 364 names beside the addresses. 365 366.. option:: -g 367 368 Print line information from debug info if available. 369 370.. option:: --full-leading-addr 371 372 Print the full leading address when disassembling. 373 374.. option:: --indirect-symbols 375 376 Display the indirect symbol table. 377 378.. option:: --info-plist 379 380 Display the info plist section as strings. 381 382.. option:: --lazy-bind 383 384 Display lazy binding info. 385 386.. option:: --link-opt-hints 387 388 Display the linker optimization hints. 389 390.. option:: -m, --macho 391 392 Use Mach-O specific object file parser. Commands and other options may behave 393 differently when used with ``--macho``. 394 395.. option:: --no-leading-headers 396 397 Do not print any leading headers. 398 399.. option:: --no-symbolic-operands 400 401 Do not print symbolic operands when disassembling. 402 403.. option:: --non-verbose 404 405 Display the information for Mach-O objects in non-verbose or numeric form. 406 407.. option:: --objc-meta-data 408 409 Display the Objective-C runtime meta data. 410 411.. option:: --private-header 412 413 Display only the first format specific file header. 414 415.. option:: --rebase 416 417 Display rebasing information. 418 419.. option:: --rpaths 420 421 Display runtime search paths for the binary. 422 423.. option:: --universal-headers 424 425 Display universal headers. 426 427.. option:: --weak-bind 428 429 Display weak binding information. 430 431XCOFF ONLY OPTIONS AND COMMANDS 432--------------------------------- 433 434.. option:: --symbol-description 435 436 Add symbol description to disassembly output. 437 438BUGS 439---- 440 441To report bugs, please visit <https://github.com/llvm/llvm-project/labels/tools:llvm-objdump/>. 442 443SEE ALSO 444-------- 445 446:manpage:`llvm-nm(1)`, :manpage:`llvm-otool(1)`, :manpage:`llvm-readelf(1)`, 447:manpage:`llvm-readobj(1)` 448