llvm-readobj-14 (1) - Linux Manuals

llvm-readobj-14: LLVM Object Reader

NAME

llvm-readobj - LLVM Object Reader

SYNOPSIS

llvm-readobj [options] [input…]

DESCRIPTION

The llvm-readobj tool displays low-level format-specific information about one or more object files.

If input is “-”, llvm-readobj reads from standard input. Otherwise, it will read from the specified filenames.

DIFFERENCES TO LLVM-READELF

llvm-readelf is an alias for the llvm-readobj tool with a slightly different command-line interface and output that is GNU compatible. Following is a list of differences between llvm-readelf and llvm-readobj:

•
llvm-readelf uses GNU for the --elf-output-style option by default. llvm-readobj uses LLVM.
•
llvm-readelf allows single-letter grouped flags (e.g. llvm-readelf -SW is the same as llvm-readelf -S -W). llvm-readobj does not allow grouping.
•
llvm-readelf provides -s as an alias for --symbols, for GNU readelf compatibility, whereas it is an alias for --section-headers in llvm-readobj.
•
llvm-readobj provides -t as an alias for --symbols. llvm-readelf does not.
•
llvm-readobj provides --sr, --sd, --st and --dt as aliases for --section-relocations, --section-data, --section-symbols and --dyn-symbols respectively. 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.

--all
Equivalent to specifying all the main display options relevant to the file format.
--addrsig
Display the address-significance table.
--expand-relocs
When used with --relocs, display each relocation in an expanded multi-line format.
--file-header, -h
Display file headers.
--headers, -e
Equivalent to setting: --file-header, --program-headers, and --sections.
--help
Display a summary of command line options.
--hex-dump=<section[,section,...]>, -x
Display the specified section(s) as hexadecimal bytes. section may be a section index or section name.
--needed-libs
Display the needed libraries.
--relocations, --relocs, -r
Display the relocation entries in the file.
--sections, --section-headers, -S
Display all sections.
--section-data, --sd
When used with --sections, display section data for each section shown. This option has no effect for GNU style output.
--section-relocations, --sr
When used with --sections, display relocations for each section shown. This option has no effect for GNU style output.
--section-symbols, --st
When used with --sections, display symbols for each section shown. This option has no effect for GNU style output.
--stackmap
Display contents of the stackmap section.
--string-dump=<section[,section,...]>, -p
Display the specified section(s) as a list of strings. section may be a section index or section name.
--string-table
Display contents of the string table.
--symbols, --syms, -s
Display the symbol table.
--unwind, -u
Display unwind information.
--version
Display the version of the llvm-readobj executable.
@<FILE>
Read command-line options from response file <FILE>.

ELF SPECIFIC OPTIONS

The following options are implemented only for the ELF file format.

--arch-specific, -A
Display architecture-specific information, e.g. the ARM attributes section on ARM.
--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.
--demangle, -C
Display demangled symbol names in the output.
--dependent-libraries
Display the dependent libraries section.
--dyn-relocations
Display the dynamic relocation entries.
--dyn-symbols, --dyn-syms, --dt
Display the dynamic symbol table.
--dynamic-table, --dynamic, -d
Display the dynamic table.
--cg-profile
Display the callgraph profile section.
--histogram, -I
Display a bucket list histogram for dynamic symbol hash tables.
--elf-linker-options
Display the linker options section.
--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 readelf output. JSON is JSON formatted output intended for machine consumption.
--section-groups, -g
Display section groups.
--gnu-hash-table
Display the GNU hash table for dynamic symbols.
--hash-symbols
Display the expanded hash table with dynamic symbol data.
--hash-table
Display the hash table for dynamic symbols.
--notes, -n
Display all notes.
--pretty-print
When used with --elf-output-style, JSON output will be formatted in a more readable format.
--program-headers, --segments, -l
Display the program headers.
--raw-relr
Do not decode relocations in RELR relocation sections when displaying them.
--section-mapping
Display the section to segment mapping.
--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.
--version-info, -V
Display version sections.

MACH-O SPECIFIC OPTIONS

The following options are implemented only for the Mach-O file format.

--macho-data-in-code
Display the Data in Code command.
--macho-dsymtab
Display the Dsymtab command.
--macho-indirect-symbols
Display indirect symbols.
--macho-linker-options
Display the Mach-O-specific linker options.
--macho-segment
Display the Segment command.
--macho-version-min
Display the version min command.

PE/COFF SPECIFIC OPTIONS

The following options are implemented only for the PE/COFF file format.

--codeview
Display CodeView debug information.
--codeview-ghash
Enable global hashing for CodeView type stream de-duplication.
--codeview-merged-types
Display the merged CodeView type stream.
--codeview-subsection-bytes
Dump raw contents of CodeView debug sections and records.
--coff-basereloc
Display the .reloc section.
--coff-debug-directory
Display the debug directory.
--coff-tls-directory
Display the TLS directory.
--coff-directives
Display the .drectve section.
--coff-exports
Display the export table.
--coff-imports
Display the import table.
--coff-load-config
Display the load config.
--coff-resources
Display the .rsrc section.

XCOFF SPECIFIC OPTIONS

The following options are implemented only for the XCOFF file format.

--auxiliary-header
Display XCOFF Auxiliary header.

EXIT STATUS

llvm-readobj returns 0 under normal operation. It returns a non-zero exit code if there were any errors.

AUTHOR

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

COPYRIGHT

2003-2022, LLVM Project

SEE ALSO

llvm-nm(1), llvm-objdump(1), llvm-readelf(1)

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