1 llvm-objdump - LLVM's object file dumper
2 ========================================
4 .. program:: llvm-objdump
9 :program:`llvm-objdump` [*commands*] [*options*] [*filenames...*]
13 The :program:`llvm-objdump` utility prints the contents of object files and
14 final 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
16 file name, :program:`llvm-objdump` will process a file on its standard input
21 At least one of the following commands are required, and some commands can be
22 combined with other commands:
24 .. option:: -a, --archive-headers
26 Display the information contained within an archive's headers.
28 .. option:: -d, --disassemble
30 Disassemble all executable sections found in the input files. On some
31 architectures (AArch64, PowerPC, 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
36 .. option:: -D, --disassemble-all
38 Disassemble all sections found in the input files.
40 .. option:: --disassemble-symbols=<symbol1[,symbol2,...]>
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`.
46 .. option:: --dwarf=<value>
48 Dump the specified DWARF debug sections. The supported values are:
50 `frames` - .debug_frame
52 .. option:: -f, --file-headers
54 Display the contents of the overall file header.
56 .. option:: --fault-map-section
58 Display the content of the fault map section.
60 .. option:: -h, --headers, --section-headers
62 Display summaries of the headers for each section.
66 Display usage information and exit. Does not stack with other commands.
68 .. option:: -p, --private-headers
70 Display format-specific file headers.
72 .. option:: -r, --reloc
74 Display the relocation entries in the file.
76 .. option:: -R, --dynamic-reloc
78 Display the dynamic relocation entries in the file.
80 .. option:: --raw-clang-ast
82 Dump the raw binary contents of the clang AST section.
84 .. option:: -s, --full-contents
86 Display the contents of each section.
88 .. option:: -t, --syms
90 Display the symbol table.
92 .. option:: -T, --dynamic-syms
94 Display the contents of the dynamic symbol table.
96 .. option:: -u, --unwind-info
98 Display the unwind info of the input(s).
100 This operation is only currently supported for COFF and Mach-O object files.
102 .. option:: -v, --version
104 Display the version of the :program:`llvm-objdump` executable. Does not stack
107 .. option:: -x, --all-headers
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`.
116 :program:`llvm-objdump` supports the following options:
118 .. option:: --adjust-vma=<offset>
120 Increase the displayed address in disassembly or section header printing by
121 the specified offset.
123 .. option:: --arch-name=<string>
125 Specify the target architecture when disassembling. Use :option:`--version`
126 for a list of available targets.
128 .. option:: --build-id=<string>
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.
133 .. option:: -C, --demangle
135 Demangle symbol names in the output.
137 .. option:: --debug-file-directory <path>
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.
143 .. option:: --debuginfod, --no-debuginfod
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
150 .. option:: --debug-vars=<format>
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.
156 .. option:: --debug-vars-indent=<width>
158 Distance to indent the source-level variable display, relative to the start
159 of the disassembly. Defaults to 52 characters.
161 .. option:: -j, --section=<section1[,section2,...]>
163 Perform commands on the specified sections only. For Mach-O use
164 `segment,section` to specify the section name.
166 .. option:: -l, --line-numbers
168 When disassembling, display source line numbers. Implies
169 :option:`--disassemble`.
171 .. option:: -M, --disassembler-options=<opt1[,opt2,...]>
173 Pass target-specific disassembler options. Available options:
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.
183 .. option:: --disassembler-color=<mode>
185 Enable or disable disassembler color output.
187 * ``off``: Disable disassembler color output.
188 * ``on``: Enable disassembler color output.
189 * ``terminal``: Enable disassembler color output if the terminal supports it (default).
191 .. option:: --mcpu=<cpu-name>
193 Target a specific CPU type for disassembly. Specify ``--mcpu=help`` to display
196 .. option:: --mattr=<a1,+a2,-a3,...>
198 Enable/disable target-specific attributes. Specify ``--mattr=help`` to display
199 the available attributes.
201 .. option:: -mllvm <arg>
203 Specify an argument to forward to LLVM's CommandLine library.
205 .. option:: --no-leading-addr, --no-addresses
207 When disassembling, do not print leading addresses for instructions or inline
210 .. option:: --no-print-imm-hex
212 Do not use hex format for immediate values in disassembly output.
214 .. option:: --no-show-raw-insn
216 When disassembling, do not print the raw bytes of each instruction.
218 .. option:: --offloading
220 Display the content of the LLVM offloading section.
222 .. option:: --prefix=<prefix>
224 When disassembling with the :option:`--source` option, prepend ``prefix`` to
227 .. option:: --prefix-strip=<level>
229 When disassembling with the :option:`--source` option, strip out ``level``
230 initial directories from absolute paths. This option has no effect without
233 .. option:: --print-imm-hex
235 Use hex format when printing immediate values in disassembly output (default).
237 .. option:: -S, --source
239 When disassembling, display source interleaved with the disassembly. Implies
240 :option:`--disassemble`.
242 .. option:: --show-all-symbols
244 Show all symbols during disassembly, even if multiple symbols are defined at
247 .. option:: --show-lma
249 Display the LMA column when dumping ELF section headers. Defaults to off
250 unless any section has different VMA and LMAs.
252 .. option:: --start-address=<address>
254 When disassembling, only disassemble from the specified address.
256 When printing relocations, only print the relocations patching offsets from at least ``address``.
258 When printing symbols, only print symbols with a value of at least ``address``.
260 .. option:: --stop-address=<address>
262 When disassembling, only disassemble up to, but not including the specified address.
264 When printing relocations, only print the relocations patching offsets up to ``address``.
266 When printing symbols, only print symbols with a value up to ``address``.
268 .. option:: --symbolize-operands
270 When disassembling, symbolize a branch target operand to print a label instead of a real address.
272 When printing a PC-relative global symbol reference, print it as an offset from the leading symbol.
274 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.
276 Only works with PowerPC objects or X86 linked images.
279 A non-symbolized branch instruction with a local target and pc-relative memory access like
283 cmp eax, dword ptr [rip + 4112]
284 jge 0x20117e <_start+0x25>
291 cmp eax, dword ptr <g>
294 .. option:: --triple=<string>
296 Target triple to disassemble for, see ``--version`` for available targets.
298 .. option:: -w, --wide
300 Ignored for compatibility with GNU objdump.
302 .. option:: --x86-asm-syntax=<style>
305 When used with :option:`--disassemble`, choose style of code to emit from
306 X86 backend. Supported values are:
317 The default disassembly style is **att**.
319 .. option:: -z, --disassemble-zeroes
321 Do not skip blocks of zeroes when disassembling.
325 Read command-line options and commands from response file `<FILE>`.
327 MACH-O ONLY OPTIONS AND COMMANDS
328 --------------------------------
330 .. option:: --arch=<architecture>
332 Specify the architecture to disassemble. see ``--version`` for available
335 .. option:: --archive-member-offsets
337 Print the offset to each archive member for Mach-O archives (requires
338 :option:`--archive-headers`).
344 .. option:: --data-in-code
346 Display the data in code table.
348 .. option:: --dis-symname=<name>
350 Disassemble just the specified symbol's instructions.
352 .. option:: --chained-fixups
354 Print chained fixup information.
356 .. option:: --dyld-info
358 Print bind and rebase information used by dyld to resolve external
359 references in a final linked binary.
361 .. option:: --dylibs-used
363 Display the shared libraries used for linked files.
365 .. option:: --dsym=<string>
367 Use .dSYM file for debug info.
369 .. option:: --dylib-id
371 Display the shared library's ID for dylib files.
373 .. option:: --exports-trie
375 Display exported symbols.
377 .. option:: --function-starts [=<addrs|names|both>]
379 Print the function starts table for Mach-O objects. Either ``addrs``
380 (default) to print only the addresses of functions, ``names`` to print only
381 the names of the functions (when available), or ``both`` to print the
382 names beside the addresses.
386 Print line information from debug info if available.
388 .. option:: --full-leading-addr
390 Print the full leading address when disassembling.
392 .. option:: --indirect-symbols
394 Display the indirect symbol table.
396 .. option:: --info-plist
398 Display the info plist section as strings.
400 .. option:: --lazy-bind
402 Display lazy binding info.
404 .. option:: --link-opt-hints
406 Display the linker optimization hints.
408 .. option:: -m, --macho
410 Use Mach-O specific object file parser. Commands and other options may behave
411 differently when used with ``--macho``.
413 .. option:: --no-leading-headers
415 Do not print any leading headers.
417 .. option:: --no-symbolic-operands
419 Do not print symbolic operands when disassembling.
421 .. option:: --non-verbose
423 Display the information for Mach-O objects in non-verbose or numeric form.
425 .. option:: --objc-meta-data
427 Display the Objective-C runtime meta data.
429 .. option:: --private-header
431 Display only the first format specific file header.
435 Display rebasing information.
439 Display runtime search paths for the binary.
441 .. option:: --universal-headers
443 Display universal headers.
445 .. option:: --weak-bind
447 Display weak binding information.
449 XCOFF ONLY OPTIONS AND COMMANDS
450 ---------------------------------
452 .. option:: --symbol-description
454 Add symbol description to disassembly output.
456 .. option:: --traceback-table
458 Decode traceback table in disassembly output. Implies :option:`--disassemble`.
463 To report bugs, please visit <https://github.com/llvm/llvm-project/labels/tools:llvm-objdump/>.
468 :manpage:`llvm-nm(1)`, :manpage:`llvm-otool(1)`, :manpage:`llvm-readelf(1)`,
469 :manpage:`llvm-readobj(1)`