llvm-readobj - LLVM Object Reader
=================================
.. program:: llvm-readobj
SYNOPSIS
--------
:program:`llvm-readobj` [*options*] [*input...*]
DESCRIPTION
-----------
The :program:`llvm-readobj` tool displays low-level format-specific information
about one or more object files.
If ``input`` is "``-``", :program:`llvm-readobj` reads from standard
input. Otherwise, it will read from the specified ``filenames``.
DIFFERENCES TO LLVM-READELF
---------------------------
:program:`llvm-readelf` is an alias for the :manpage:`llvm-readobj` tool with a
slightly different command-line interface and output that is GNU compatible.
Following is a list of differences between :program:`llvm-readelf` and
:program:`llvm-readobj`:
- :program:`llvm-readelf` uses `GNU` for the :option:`--elf-output-style` option
by default. :program:`llvm-readobj` uses `LLVM`.
- :program:`llvm-readelf` allows single-letter grouped flags (e.g.
``llvm-readelf -SW`` is the same as ``llvm-readelf -S -W``).
:program:`llvm-readobj` does not allow grouping.
- :program:`llvm-readelf` provides :option:`-s` as an alias for
:option:`--symbols`, for GNU :program:`readelf` compatibility, whereas it is
an alias for :option:`--section-headers` in :program:`llvm-readobj`.
- :program:`llvm-readobj` provides ``-t`` as an alias for :option:`--symbols`.
:program:`llvm-readelf` does not.
- :program:`llvm-readobj` provides ``--sr``, ``--sd``, ``--st`` and ``--dt`` as
aliases for :option:`--section-relocations`, :option:`--section-data`,
:option:`--section-symbols` and :option:`--dyn-symbols` respectively.
:program:`llvm-readelf` does not provide these aliases, to avoid conflicting
with grouped flags.
GENERAL AND MULTI-FORMAT OPTIONS
--------------------------------
These options are applicable to more than one file format, or are unrelated to
file formats.
.. option:: --all
Equivalent to specifying all the main display options relevant to the file
format.
.. option:: --addrsig
Display the address-significance table.
.. option:: --expand-relocs
When used with :option:`--relocs`, display each relocation in an expanded
multi-line format.
.. option:: --file-header, -h
Display file headers.
.. option:: --headers, -e
Equivalent to setting: :option:`--file-header`, :option:`--program-headers`,
and :option:`--sections`.
.. option:: --help
Display a summary of command line options.
.. option:: --hex-dump=<section[,section,...]>, -x
Display the specified section(s) as hexadecimal bytes. ``section`` may be a
section index or section name.
.. option:: --needed-libs
Display the needed libraries.
.. option:: --relocations, --relocs, -r
Display the relocation entries in the file.
.. option:: --sections, --section-headers, -S
Display all sections.
.. option:: --section-data, --sd
When used with :option:`--sections`, display section data for each section
shown. This option has no effect for GNU style output.
.. option:: --section-relocations, --sr
When used with :option:`--sections`, display relocations for each section
shown. This option has no effect for GNU style output.
.. option:: --section-symbols, --st
When used with :option:`--sections`, display symbols for each section shown.
This option has no effect for GNU style output.
.. option:: --sort-symbols=<sort_key[,sort_key]>
Specify the keys to sort symbols before displaying symtab.
Valid values for sort_key are ``name`` and ``type``.
.. option:: --stackmap
Display contents of the stackmap section.
.. option:: --string-dump=<section[,section,...]>, -p
Display the specified section(s) as a list of strings. ``section`` may be a
section index or section name.
.. option:: --string-table
Display contents of the string table.
.. option:: --symbols, --syms, -s
Display the symbol table.
.. option:: --unwind, -u
Display unwind information.
.. option:: --version
Display the version of the :program:`llvm-readobj` executable.
.. option:: @<FILE>
Read command-line options from response file `<FILE>`.
ELF SPECIFIC OPTIONS
--------------------
The following options are implemented only for the ELF file format.
.. option:: --arch-specific, -A
Display architecture-specific information, e.g. the ARM attributes section on ARM.
.. option:: --bb-addr-map
Display the contents of the basic block address map section(s), which contain the
address of each function, along with the relative offset of each basic block.
.. option:: --demangle, -C
Display demangled symbol names in the output.
.. option:: --dependent-libraries
Display the dependent libraries section.
.. option:: --dyn-relocations
Display the dynamic relocation entries.
.. option:: --dyn-symbols, --dyn-syms, --dt
Display the dynamic symbol table.
.. option:: --dynamic-table, --dynamic, -d
Display the dynamic table.
.. option:: --cg-profile
Display the callgraph profile section.
.. option:: --histogram, -I
Display a bucket list histogram for dynamic symbol hash tables.
.. option:: --elf-linker-options
Display the linker options section.
.. option:: --elf-output-style=<value>
Format ELF information in the specified style. Valid options are ``LLVM``,
``GNU``, and ``JSON``. ``LLVM`` output (the default) is an expanded and
structured format. ``GNU`` output mimics the equivalent GNU :program:`readelf`
output. ``JSON`` is JSON formatted output intended for machine consumption.
.. option:: --section-groups, -g
Display section groups.
.. option:: --gnu-hash-table
Display the GNU hash table for dynamic symbols.
.. option:: --hash-symbols
Display the expanded hash table with dynamic symbol data.
.. option:: --hash-table
Display the hash table for dynamic symbols.
.. option:: --notes, -n
Display all notes.
.. option:: --pretty-print
When used with :option:`--elf-output-style`, JSON output will be formatted in
a more readable format.
.. option:: --program-headers, --segments, -l
Display the program headers.
.. option:: --raw-relr
Do not decode relocations in RELR relocation sections when displaying them.
.. option:: --section-mapping
Display the section to segment mapping.
.. option:: --stack-sizes
Display the contents of the stack sizes section(s), i.e. pairs of function
names and the size of their stack frames. Currently only implemented for GNU
style output.
.. option:: --version-info, -V
Display version sections.
MACH-O SPECIFIC OPTIONS
-----------------------
The following options are implemented only for the Mach-O file format.
.. option:: --macho-data-in-code
Display the Data in Code command.
.. option:: --macho-dsymtab
Display the Dsymtab command.
.. option:: --macho-indirect-symbols
Display indirect symbols.
.. option:: --macho-linker-options
Display the Mach-O-specific linker options.
.. option:: --macho-segment
Display the Segment command.
.. option:: --macho-version-min
Display the version min command.
PE/COFF SPECIFIC OPTIONS
------------------------
The following options are implemented only for the PE/COFF file format.
.. option:: --codeview
Display CodeView debug information.
.. option:: --codeview-ghash
Enable global hashing for CodeView type stream de-duplication.
.. option:: --codeview-merged-types
Display the merged CodeView type stream.
.. option:: --codeview-subsection-bytes
Dump raw contents of CodeView debug sections and records.
.. option:: --coff-basereloc
Display the .reloc section.
.. option:: --coff-debug-directory
Display the debug directory.
.. option:: --coff-tls-directory
Display the TLS directory.
.. option:: --coff-directives
Display the .drectve section.
.. option:: --coff-exports
Display the export table.
.. option:: --coff-imports
Display the import table.
.. option:: --coff-load-config
Display the load config.
.. option:: --coff-resources
Display the .rsrc section.
XCOFF SPECIFIC OPTIONS
----------------------
The following options are implemented only for the XCOFF file format.
.. option:: --auxiliary-header
Display XCOFF Auxiliary header.
EXIT STATUS
-----------
:program:`llvm-readobj` returns 0 under normal operation. It returns a non-zero
exit code if there were any errors.
SEE ALSO
--------
:manpage:`llvm-nm(1)`, :manpage:`llvm-objdump(1)`, :manpage:`llvm-readelf(1)`