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LLVM-OBJDUMP(1) LLVM LLVM-OBJDUMP(1)

llvm-objdump - LLVM's object file dumper

llvm-objdump [commands] [options] [filenames...]

The llvm-objdump utility prints the contents of object files and final linked images named on the command line. If no file name is specified, llvm-objdump will attempt to read from a.out. If - is used as a file name, llvm-objdump will process a file on its standard input stream.

At least one of the following commands are required, and some commands can be combined with other commands:
-a, --archive-headers
Display the information contained within an archive's headers.

-d, --disassemble
Disassemble all executable sections found in the input files.

-D, --disassemble-all
Disassemble all sections found in the input files.

--disassemble-symbols=<symbol1[,symbol2,...]>
Disassemble only the specified symbols. Takes demangled symbol names when --demangle is specified, otherwise takes mangled symbol names. Implies --disassemble.

--dwarf=<value>
Dump the specified DWARF debug sections. The supported values are:

frames - .debug_frame


-f, --file-headers
Display the contents of the overall file header.

--fault-map-section
Display the content of the fault map section.

-h, --headers, --section-headers
Display summaries of the headers for each section.

--help
Display usage information and exit. Does not stack with other commands.

-p, --private-headers
Display format-specific file headers.

-r, --reloc
Display the relocation entries in the file.

-R, --dynamic-reloc
Display the dynamic relocation entries in the file.

--raw-clang-ast
Dump the raw binary contents of the clang AST section.

-s, --full-contents
Display the contents of each section.

-t, --syms
Display the symbol table.

-T, --dynamic-syms
Display the contents of the dynamic symbol table.

-u, --unwind-info
Display the unwind info of the input(s).

This operation is only currently supported for COFF and Mach-O object files.


-v, --version
Display the version of the llvm-objdump executable. Does not stack with other commands.

-x, --all-headers
Display all available header information. Equivalent to specifying --archive-headers, --file-headers, --private-headers, --reloc, --section-headers, and --syms.

llvm-objdump supports the following options:
--adjust-vma=<offset>
Increase the displayed address in disassembly or section header printing by the specified offset.

--arch-name=<string>
Specify the target architecture when disassembling. Use --version for a list of available targets.

-C, --demangle
Demangle symbol names in the output.

--debug-vars=<format>
Print the locations (in registers or memory) of source-level variables alongside disassembly. format may be unicode or ascii, defaulting to unicode if omitted.

--debug-vars-indent=<width>
Distance to indent the source-level variable display, relative to the start of the disassembly. Defaults to 52 characters.

-j, --section=<section1[,section2,...]>
Perform commands on the specified sections only. For Mach-O use segment,section to specify the section name.

-l, --line-numbers
When disassembling, display source line numbers. Implies --disassemble.

-M, --disassembler-options=<opt1[,opt2,...]>
Pass target-specific disassembler options. Available options:
  • reg-names-std: ARM only (default). Print in ARM 's instruction set documentation, with r13/r14/r15 replaced by sp/lr/pc.
  • reg-names-raw: ARM only. Use r followed by the register number.
  • no-aliases: AArch64 and RISC-V only. Print raw instruction mnemonic instead of pseudo instruction mnemonic.
  • numeric: RISC-V only. Print raw register names instead of ABI mnemonic. (e.g. print x1 instead of ra)
  • att: x86 only (default). Print in the AT&T syntax.
  • intel: x86 only. Print in the intel syntax.


--mcpu=<cpu-name>
Target a specific CPU type for disassembly. Specify --mcpu=help to display available CPUs.

--mattr=<a1,+a2,-a3,...>
Enable/disable target-specific attributes. Specify --mattr=help to display the available attributes.

--no-leading-addr
When disassembling, do not print leading addresses.

--no-print-imm-hex
Do not use hex format for immediate values in disassembly output (default).

--no-show-raw-insn
When disassembling, do not print the raw bytes of each instruction.

--prefix=<prefix>
When disassembling with the --source option, prepend prefix to absolute paths.

--prefix-strip=<level>
When disassembling with the --source option, strip out level initial directories from absolute paths. This option has no effect without --prefix.

--print-imm-hex
Use hex format when printing immediate values in disassembly output.

-S, --source
When disassembling, display source interleaved with the disassembly. Implies --disassemble.

--show-lma
Display the LMA column when dumping ELF section headers. Defaults to off unless any section has different VMA and LMAs.

--start-address=<address>
When disassembling, only disassemble from the specified address.

When printing relocations, only print the relocations patching offsets from at least address.

When printing symbols, only print symbols with a value of at least address.


--stop-address=<address>
When disassembling, only disassemble up to, but not including the specified address.

When printing relocations, only print the relocations patching offsets up to address.

When printing symbols, only print symbols with a value up to address.


--symbolize-operands
When disassembling, symbolize a branch target operand to print a label instead of a real address.

When printing a PC-relative global symbol reference, print it as an offset from the leading symbol.

Only works with PowerPC objects or X86 linked images.

Example:
A non-symbolized branch instruction with a local target and pc-relative memory access like

cmp eax, dword ptr [rip + 4112]
jge 0x20117e <_start+0x25>


might become

<L0>:
  cmp eax, dword ptr <g>
  jge      <L0>



--triple=<string>
Target triple to disassemble for, see --version for available targets.

-w, --wide
Ignored for compatibility with GNU objdump.

--x86-asm-syntax=<style>
Deprecated. When used with --disassemble, choose style of code to emit from X86 backend. Supported values are:
att
AT&T-style assembly

intel
Intel-style assembly



The default disassembly style is att.


-z, --disassemble-zeroes
Do not skip blocks of zeroes when disassembling.

@<FILE>
Read command-line options and commands from response file <FILE>.

--arch=<architecture>
Specify the architecture to disassemble. see --version for available architectures.

--archive-member-offsets
Print the offset to each archive member for Mach-O archives (requires --archive-headers).

--bind
Display binding info

--data-in-code
Display the data in code table.

--dis-symname=<name>
Disassemble just the specified symbol's instructions.

--dyld_info
Print bind and rebase information used by dyld to resolve external references in a final linked binary.

--dylibs-used
Display the shared libraries used for linked files.

--dsym=<string>
Use .dSYM file for debug info.

--dylib-id
Display the shared library's ID for dylib files.

--exports-trie
Display exported symbols.

--function-starts
Print the function starts table for Mach-O objects.

-g
Print line information from debug info if available.

--full-leading-addr
Print the full leading address when disassembling.

--indirect-symbols
Display the indirect symbol table.

--info-plist
Display the info plist section as strings.

--lazy-bind
Display lazy binding info.

--link-opt-hints
Display the linker optimization hints.

-m, --macho
Use Mach-O specific object file parser. Commands and other options may behave differently when used with --macho.

--no-leading-headers
Do not print any leading headers.

--no-symbolic-operands
Do not print symbolic operands when disassembling.

--non-verbose
Display the information for Mach-O objects in non-verbose or numeric form.

--objc-meta-data
Display the Objective-C runtime meta data.

--private-header
Display only the first format specific file header.

--rebase
Display rebasing information.

--rpaths
Display runtime search paths for the binary.

--universal-headers
Display universal headers.

--weak-bind
Display weak binding information.

--symbol-description
Add symbol description to disassembly output.

To report bugs, please visit <https://github.com/llvm/llvm-project/labels/tools:llvm-objdump/>.

llvm-nm(1), llvm-otool(1), llvm-readelf(1), llvm-readobj(1)

Maintained by the LLVM Team (https://llvm.org/).

2003-2022, LLVM Project
2022-04-13 15

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