@copying
@c man begin COPYRIGHT
-Copyright @copyright{} 1991-2017 Free Software Foundation, Inc.
+Copyright @copyright{} 1991-2020 Free Software Foundation, Inc.
Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3
* c++filt: (binutils)c++filt. Filter to demangle encoded C++ symbols.
* cxxfilt: (binutils)c++filt. MS-DOS name for c++filt.
* dlltool: (binutils)dlltool. Create files needed to build and use DLLs.
-* nlmconv: (binutils)nlmconv. Converts object code into an NLM.
* nm: (binutils)nm. List symbols from object files.
* objcopy: (binutils)objcopy. Copy and translate object files.
* objdump: (binutils)objdump. Display information from object files.
* size: (binutils)size. List section sizes and total size.
* strings: (binutils)strings. List printable strings from files.
* strip: (binutils)strip. Discard symbols.
-* elfedit: (binutils)elfedit. Update the ELF header of ELF files.
+* elfedit: (binutils)elfedit. Update ELF header and property of ELF files.
* windmc: (binutils)windmc. Generator for Windows message resources.
* windres: (binutils)windres. Manipulate Windows resources.
@end direntry
Discard symbols
@item elfedit
-Update the ELF header of ELF files.
+Update the ELF header and program property of ELF files.
@item c++filt
Demangle encoded C++ symbols (on MS-DOS, this program is named
@item addr2line
Convert addresses into file names and line numbers
-@item nlmconv
-Convert object code into a Netware Loadable Module
-
@item windres
Manipulate Windows resources
* c++filt:: Filter to demangle encoded C++ symbols
* cxxfilt: c++filt. MS-DOS name for c++filt
* addr2line:: Convert addresses to file and line
-* nlmconv:: Converts object code into an NLM
* windmc:: Generator for Windows message resources
* windres:: Manipulate Windows resources
* dlltool:: Create files needed to build and use DLLs
* readelf:: Display the contents of ELF format files
-* elfedit:: Update the ELF header of ELF files
+* elfedit:: Update ELF header and property of ELF files
* Common Options:: Command-line options for all utilities
* Selecting the Target System:: How these utilities determine the target
+* debuginfod:: Using binutils with debuginfod
* Reporting Bugs:: Reporting Bugs
* GNU Free Documentation License:: GNU Free Documentation License
* Binutils Index:: Binutils Index
@c man title ar create, modify, and extract from archives
@smallexample
-ar [-]@var{p}[@var{mod}] [@option{--plugin} @var{name}] [@option{--target} @var{bfdname}] [@var{relpos}] [@var{count}] @var{archive} [@var{member}@dots{}]
+ar [-]@var{p}[@var{mod}] [@option{--plugin} @var{name}] [@option{--target} @var{bfdname}] [@option{--output} @var{dirname}] [@var{relpos}] [@var{count}] @var{archive} [@var{member}@dots{}]
ar -M [ <mri-script ]
@end smallexample
@smallexample
@c man begin SYNOPSIS ar
-ar [@option{-X32_64}] [@option{-}]@var{p}[@var{mod}] [@option{--plugin} @var{name}] [@option{--target} @var{bfdname}] [@var{relpos}] [@var{count}] @var{archive} [@var{member}@dots{}]
+ar [@option{-X32_64}] [@option{-}]@var{p}[@var{mod}] [@option{--plugin} @var{name}] [@option{--target} @var{bfdname}] [@option{--output} @var{dirname}] [@var{relpos}] [@var{count}] @var{archive} [@var{member}@dots{}]
@c man end
@end smallexample
@cindex contents of archive
Display a @emph{table} listing the contents of @var{archive}, or those
of the files listed in @var{member}@dots{} that are present in the
-archive. Normally only the member name is shown; if you also want to
-see the modes (permissions), timestamp, owner, group, and size, you can
-request that by also specifying the @samp{v} modifier.
+archive. Normally only the member name is shown, but if the modifier
+@samp{O} is specified, then the corresponding offset of the member is also
+displayed. Finally, in order to see the modes (permissions), timestamp,
+owner, group, and size the @samp{v} modifier should be included.
If you do not specify a @var{member}, all files in the archive
are listed.
If you do not specify a @var{member}, all files in the archive
are extracted.
-Files cannot be extracted from a thin archive.
+Files cannot be extracted from a thin archive, and there are
+restrictions on extracting from archives created with @option{P}: The
+paths must not be absolute, may not contain @code{..}, and any
+subdirectories in the paths must exist. If it is desired to avoid
+these restrictions then used the @option{--output} option to specify
+an output directory.
@end table
A number of modifiers (@var{mod}) may immediately follow the @var{p}
you do not specify this modifier, files extracted from the archive
are stamped with the time of extraction.
+@item O
+@cindex offsets of files
+Display member offsets inside the archive. Use together with the @samp{t}
+option.
+
@item P
-Use the full path name when matching names in the archive. @sc{gnu}
-@command{ar} can not create an archive with a full path name (such archives
-are not POSIX complaint), but other archive creators can. This option
-will cause @sc{gnu} @command{ar} to match file names using a complete path
-name, which can be convenient when extracting a single file from an
-archive created by another tool.
+Use the full path name when matching or storing names in the archive.
+Archives created with full path names are not POSIX compliant, and
+thus may not work with tools other than up to date @sc{gnu} tools.
+Modifying such archives with @sc{gnu} @command{ar} without using
+@option{P} will remove the full path names unless the archive is a
+thin archive. Note that @option{P} may be useful when adding files to
+a thin archive since @option{r} without @option{P} ignores the path
+when choosing which element to replace. Thus
+@smallexample
+ar rcST archive.a subdir/file1 subdir/file2 file1
+@end smallexample
+will result in the first @code{subdir/file1} being replaced with
+@code{file1} from the current directory. Adding @option{P} will
+prevent this replacement.
@item s
@cindex writing archive index
This modifier shows the version number of @command{ar}.
@end table
-The @command{ar} program also supports some command line options which
+The @command{ar} program also supports some command-line options which
are neither modifiers nor actions, but which do change its behaviour
in specific ways:
@table @samp
@item --help
-Displays the list of command line options supported by @command{ar}
+Displays the list of command-line options supported by @command{ar}
and then exits.
@item --version
Displays the version information of @command{ar} and then exits.
@item -X32_64
-@command{ar} ignores an initial option spelt @samp{-X32_64}, for
+@command{ar} ignores an initial option spelled @samp{-X32_64}, for
compatibility with AIX. The behaviour produced by this option is the
default for @sc{gnu} @command{ar}. @command{ar} does not support any
of the other @samp{-X} options; in particular, it does not support
@item --plugin @var{name}
@cindex plugins
-The optional command line switch @option{--plugin @var{name}} causes
+The optional command-line switch @option{--plugin @var{name}} causes
@command{ar} to load the plugin called @var{name} which adds support
for more file formats, including object files with link-time
optimization information.
sufficient to just copy the newest one.
@item --target @var{target}
-The optional command line switch @option{--target @var{bfdname}}
+The optional command-line switch @option{--target @var{bfdname}}
specifies that the archive members are in an object code format
different from your system's default format. See
@xref{Target Selection}, for more information.
+
+@item --output @var{dirname}
+The @option{--output} option can be used to specify a path to a
+directory into which archive members should be extracted. If this
+option is not specified then the current directory will be used.
+
+Note - although the presence of this option does imply a @option{x}
+extraction operation that option must still be included on the command
+line.
+
@end table
@c man end
[@option{-s}|@option{--print-armap}] [@option{-t} @var{radix}|@option{--radix=}@var{radix}]
[@option{-u}|@option{--undefined-only}] [@option{-V}|@option{--version}]
[@option{-X 32_64}] [@option{--defined-only}] [@option{--no-demangle}]
- [@option{--plugin} @var{name}] [@option{--size-sort}] [@option{--special-syms}]
- [@option{--synthetic}] [@option{--with-symbol-versions}] [@option{--target=}@var{bfdname}]
+ [@option{--plugin} @var{name}]
+ [@option{--no-recurse-limit}|@option{--recurse-limit}]]
+ [@option{--size-sort}] [@option{--special-syms}]
+ [@option{--synthetic}] [@option{--target=}@var{bfdname}]
[@var{objfile}@dots{}]
@c man end
@end smallexample
@item B
@itemx b
-The symbol is in the uninitialized data section (known as BSS).
+The symbol is in the BSS data section. This section typically
+contains zero-initialized or uninitialized data, although the exact
+behavior is system dependent.
@item C
+@itemx c
The symbol is common. Common symbols are uninitialized data. When
linking, multiple common symbols may appear with the same name. If the
symbol is defined anywhere, the common symbols are treated as undefined
For more details on common symbols, see the discussion of
--warn-common in @ref{Options,,Linker options,ld.info,The GNU linker}.
@end ifclear
+The lower case @var{c} character is used when the symbol is in a
+special section for small commons.
@item D
@itemx d
@item N
The symbol is a debugging symbol.
+@item n
+The symbol is in the read-only data section.
+
@item p
-The symbols is in a stack unwind section.
+The symbol is in a stack unwind section.
@item R
@itemx r
@item S
@itemx s
-The symbol is in an uninitialized data section for small objects.
+The symbol is in an uninitialized or zero-initialized data section
+for small objects.
@item T
@itemx t
@end table
@item
-The symbol name.
+The symbol name. If a symbol has version information associated with it,
+then the version information is displayed as well. If the versioned
+symbol is undefined or hidden from linker, the version string is displayed
+as a suffix to the symbol name, preceded by an @@ character. For example
+@samp{foo@@VER_1}. If the version is the default version to be used when
+resolving unversioned references to the symbol, then it is displayed as a
+suffix preceded by two @@ characters. For example @samp{foo@@@@VER_2}.
@end itemize
@c man end
@item --no-demangle
Do not demangle low-level symbol names. This is the default.
+@item --recurse-limit
+@itemx --no-recurse-limit
+@itemx --recursion-limit
+@itemx --no-recursion-limit
+Enables or disables a limit on the amount of recursion performed
+whilst demangling strings. Since the name mangling formats allow for
+an infinite level of recursion it is possible to create strings whose
+decoding will exhaust the amount of stack space available on the host
+machine, triggering a memory fault. The limit tries to prevent this
+from happening by restricting recursion to 2048 levels of nesting.
+
+The default is for this limit to be enabled, but disabling it may be
+necessary in order to demangle truly complicated names. Note however
+that if the recursion limit is disabled then stack exhaustion is
+possible and any bug reports about such an event will be rejected.
+
@item -D
@itemx --dynamic
@cindex dynamic symbols
created by the linker for various purposes. They are not shown by
default since they are not part of the binary's original source code.
-@item --with-symbol-versions
-Enables the display of symbol version information if any exists. The
-version string is displayed as a suffix to the symbol name, preceeded by
-an @@ character. For example @samp{foo@@VER_1}. If the version is
-the default version to be used when resolving unversioned references
-to the symbol then it is displayed as a suffix preceeded by two @@
-characters. For example @samp{foo@@@@VER_2}.
-
@item --target=@var{bfdname}
@cindex object code format
Specify an object code format other than your system's default format.
[@option{-B} @var{bfdarch}|@option{--binary-architecture=}@var{bfdarch}]
[@option{-S}|@option{--strip-all}]
[@option{-g}|@option{--strip-debug}]
+ [@option{--strip-unneeded}]
[@option{-K} @var{symbolname}|@option{--keep-symbol=}@var{symbolname}]
[@option{-N} @var{symbolname}|@option{--strip-symbol=}@var{symbolname}]
[@option{--strip-unneeded-symbol=}@var{symbolname}]
[@option{--localize-hidden}]
[@option{-L} @var{symbolname}|@option{--localize-symbol=}@var{symbolname}]
[@option{--globalize-symbol=}@var{symbolname}]
+ [@option{--globalize-symbols=}@var{filename}]
[@option{-W} @var{symbolname}|@option{--weaken-symbol=}@var{symbolname}]
[@option{-w}|@option{--wildcard}]
[@option{-x}|@option{--discard-all}]
[@option{--interleave-width=}@var{width}]
[@option{-j} @var{sectionpattern}|@option{--only-section=}@var{sectionpattern}]
[@option{-R} @var{sectionpattern}|@option{--remove-section=}@var{sectionpattern}]
+ [@option{--keep-section=}@var{sectionpattern}]
[@option{--remove-relocations=}@var{sectionpattern}]
[@option{-p}|@option{--preserve-dates}]
[@option{-D}|@option{--enable-deterministic-archives}]
[@option{--change-section-vma} @var{sectionpattern}@{=,+,-@}@var{val}]
[@option{--change-warnings}] [@option{--no-change-warnings}]
[@option{--set-section-flags} @var{sectionpattern}=@var{flags}]
+ [@option{--set-section-alignment} @var{sectionpattern}=@var{align}]
[@option{--add-section} @var{sectionname}=@var{filename}]
[@option{--dump-section} @var{sectionname}=@var{filename}]
[@option{--update-section} @var{sectionname}=@var{filename}]
[@option{--strip-unneeded-symbols=}@var{filename}]
[@option{--keep-global-symbols=}@var{filename}]
[@option{--localize-symbols=}@var{filename}]
- [@option{--globalize-symbols=}@var{filename}]
[@option{--weaken-symbols=}@var{filename}]
- [@option{--add-symbol} @var{name}=[@var{section}:]@var{value}[,@var{flags}]
+ [@option{--add-symbol} @var{name}=[@var{section}:]@var{value}[,@var{flags}]]
[@option{--alt-machine-code=}@var{index}]
[@option{--prefix-symbols=}@var{string}]
[@option{--prefix-sections=}@var{string}]
[@option{--elf-stt-common=@var{val}}]
[@option{--merge-notes}]
[@option{--no-merge-notes}]
+ [@option{--verilog-data-width=@var{val}}]
[@option{-v}|@option{--verbose}]
[@option{-V}|@option{--version}]
[@option{--help}] [@option{--info}]
--only-section=.text.* --only-section=!.text.foo
@end smallexample
-will copy all sectinos maching '.text.*' but not the section
+will copy all sectinos matching '.text.*' but not the section
'.text.foo'.
@item -R @var{sectionpattern}
will remove all sections matching the pattern '.text.*', but will not
remove the section '.text.foo'.
+@item --keep-section=@var{sectionpattern}
+When removing sections from the output file, keep sections that match
+@var{sectionpattern}.
+
@item --remove-relocations=@var{sectionpattern}
-Remove relocations from the output file for any section matching
-@var{sectionpattern}. This option may be given more than once. Note
-that using this option inappropriately may make the output file
-unusable. Wildcard characters are accepted in @var{sectionpattern}.
+Remove non-dynamic relocations from the output file for any section
+matching @var{sectionpattern}. This option may be given more than
+once. Note that using this option inappropriately may make the output
+file unusable, and attempting to remove a dynamic relocation section
+such as @samp{.rela.plt} from an executable or shared library with
+@option{--remove-relocations=.plt} will not work. Wildcard characters
+are accepted in @var{sectionpattern}.
For example:
@smallexample
--remove-relocations=.text.*
@end smallexample
-will remove the relocations for all sections matching the patter
+will remove the relocations for all sections matching the pattern
'.text.*'.
If the first character of @var{sectionpattern} is the exclamation
@item -S
@itemx --strip-all
Do not copy relocation and symbol information from the source file.
+Also deletes debug sections.
@item -g
@itemx --strip-debug
Do not copy debugging symbols or sections from the source file.
@item --strip-unneeded
-Strip all symbols that are not needed for relocation processing.
+Remove all symbols that are not needed for relocation processing in
+addition to debugging symbols and sections stripped by
+@option{--strip-debug}.
@item -K @var{symbolname}
@itemx --keep-symbol=@var{symbolname}
@itemx --keep-global-symbol=@var{symbolname}
Keep only symbol @var{symbolname} global. Make all other symbols local
to the file, so that they are not visible externally. This option may
-be given more than once.
+be given more than once. Note: this option cannot be used in
+conjunction with the @option{--globalize-symbol} or
+@option{--globalize-symbols} options.
@item --localize-hidden
In an ELF object, mark all symbols that have hidden or internal visibility
@item --globalize-symbol=@var{symbolname}
Give symbol @var{symbolname} global scoping so that it is visible
outside of the file in which it is defined. This option may be given
-more than once.
+more than once. Note: this option cannot be used in conjunction with
+the @option{-G} or @option{--keep-global-symbol} options.
@item -w
@itemx --wildcard
filled in with the value specified by @option{--gap-fill} (default zero).
@item --set-start @var{val}
-Set the start address of the new file to @var{val}. Not all object file
-formats support setting the start address.
+Set the start address (also known as the entry address) of the new
+file to @var{val}. Not all object file formats support setting the
+start address.
@item --change-start @var{incr}
@itemx --adjust-start @var{incr}
@cindex changing start address
-Change the start address by adding @var{incr}. Not all object file
-formats support setting the start address.
+Change the start address (also known as the entry address) by adding
+@var{incr}. Not all object file formats support setting the start
+address.
@item --change-addresses @var{incr}
@itemx --adjust-vma @var{incr}
@var{flags} argument is a comma separated string of flag names. The
recognized names are @samp{alloc}, @samp{contents}, @samp{load},
@samp{noload}, @samp{readonly}, @samp{code}, @samp{data}, @samp{rom},
-@samp{share}, and @samp{debug}. You can set the @samp{contents} flag
-for a section which does not have contents, but it is not meaningful
-to clear the @samp{contents} flag of a section which does have
-contents--just remove the section instead. Not all flags are
-meaningful for all object file formats.
+@samp{exclude}, @samp{share}, and @samp{debug}. You can set the
+@samp{contents} flag for a section which does not have contents, but it
+is not meaningful to clear the @samp{contents} flag of a section which
+does have contents--just remove the section instead. Not all flags are
+meaningful for all object file formats. In particular the
+@samp{share} flag is only meaningful for COFF format files and not for
+ELF format files.
+
+@item --set-section-alignment @var{sectionpattern}=@var{align}
+Set the alignment for any sections matching @var{sectionpattern}.
+@var{align} specifies the alignment in bytes and must be a power of
+two, i.e. 1, 2, 4, 8@dots{}.
@item --add-section @var{sectionname}=@var{filename}
Add a new section named @var{sectionname} while copying the file. The
@item --rename-section @var{oldname}=@var{newname}[,@var{flags}]
Rename a section from @var{oldname} to @var{newname}, optionally
changing the section's flags to @var{flags} in the process. This has
-the advantage over usng a linker script to perform the rename in that
+the advantage over using a linker script to perform the rename in that
the output stays as an object file and does not become a linked
-executable.
+executable. This option accepts the same set of flags as the
+@option{--sect-section-flags} option.
This option is particularly helpful when the input format is binary,
since this will always create a section called .data. If for example,
Apply @option{--globalize-symbol} option to each symbol listed in the file
@var{filename}. @var{filename} is simply a flat file, with one symbol
name per line. Line comments may be introduced by the hash character.
-This option may be given more than once.
+This option may be given more than once. Note: this option cannot be
+used in conjunction with the @option{-G} or @option{--keep-global-symbol}
+options.
@item --weaken-symbols=@var{filename}
Apply @option{--weaken-symbol} option to each symbol listed in the file
@smallexample
objcopy --add-gnu-debuglink=foo.debug
@end smallexample
-
+
At debug time the debugger will attempt to look for the separate debug
info file in a set of known locations. The exact set of these
locations varies depending upon the distribution being used, but it
to create these files is as follows:
@enumerate
-@item Link the executable as normal. Assuming that is is called
+@item Link the executable as normal. Assuming that it is called
@code{foo} then...
@item Run @code{objcopy --only-keep-debug foo foo.dbg} to
create a file containing the debugging info.
[This option is specific to PE targets.]
@item --section-alignment @var{num}
-Sets the section alignment. Sections in memory will always begin at
-addresses which are a multiple of this number. Defaults to 0x1000.
+Sets the section alignment field in the PE header. Sections in memory
+will always begin at addresses which are a multiple of this number.
+Defaults to 0x1000.
[This option is specific to PE targets.]
@item --stack @var{reserve}
@itemx --version
Show the version number of @command{objcopy}.
+@item --verilog-data-width=@var{bytes}
+For Verilog output, this options controls the number of bytes
+converted for each output data element. The input target controls the
+endianness of the conversion.
+
@item -v
@itemx --verbose
Verbose output: list all object files modified. In the case of
@cindex object file information
@kindex objdump
-@c man title objdump display information from object files.
+@c man title objdump display information from object files
@smallexample
@c man begin SYNOPSIS objdump
objdump [@option{-a}|@option{--archive-headers}]
[@option{-b} @var{bfdname}|@option{--target=@var{bfdname}}]
[@option{-C}|@option{--demangle}[=@var{style}] ]
- [@option{-d}|@option{--disassemble}]
+ [@option{-d}|@option{--disassemble}[=@var{symbol}]]
[@option{-D}|@option{--disassemble-all}]
[@option{-z}|@option{--disassemble-zeroes}]
[@option{-EB}|@option{-EL}|@option{--endian=}@{big | little @}]
[@option{-j} @var{section}|@option{--section=}@var{section}]
[@option{-l}|@option{--line-numbers}]
[@option{-S}|@option{--source}]
+ [@option{--source-comment}[=@var{text}]]
[@option{-m} @var{machine}|@option{--architecture=}@var{machine}]
[@option{-M} @var{options}|@option{--disassembler-options=}@var{options}]
[@option{-p}|@option{--private-headers}]
[@option{-r}|@option{--reloc}]
[@option{-R}|@option{--dynamic-reloc}]
[@option{-s}|@option{--full-contents}]
- [@option{-W[lLiaprmfFsoRtUuTgAckK]}|
- @option{--dwarf}[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames-interp,=str,=loc,=Ranges,=pubtypes,=trace_info,=trace_abbrev,=trace_aranges,=gdb_index,=addr,=cu_index,=links,=follow-links]
+ [@option{-W[lLiaprmfFsoORtUuTgAckK]}|
+ @option{--dwarf}[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames-interp,=str,=str-offsets,=loc,=Ranges,=pubtypes,=trace_info,=trace_abbrev,=trace_aranges,=gdb_index,=addr,=cu_index,=links,=follow-links]]
+ [@option{--ctf=}@var{section}]
[@option{-G}|@option{--stabs}]
[@option{-t}|@option{--syms}]
[@option{-T}|@option{--dynamic-syms}]
[@option{-w}|@option{--wide}]
[@option{--start-address=}@var{address}]
[@option{--stop-address=}@var{address}]
+ [@option{--no-addresses}]
[@option{--prefix-addresses}]
[@option{--[no-]show-raw-insn}]
[@option{--adjust-vma=}@var{offset}]
[@option{--dwarf-depth=@var{n}}]
[@option{--dwarf-start=@var{n}}]
+ [@option{--ctf-parent=}@var{section}]
+ [@option{--no-recurse-limit}|@option{--recurse-limit}]
[@option{--special-syms}]
[@option{--prefix=}@var{prefix}]
[@option{--prefix-strip=}@var{level}]
[@option{--insn-width=}@var{width}]
+ [@option{--visualize-jumps[=color|=extended-color|=off]}
[@option{-V}|@option{--version}]
[@option{-H}|@option{--help}]
@var{objfile}@dots{}
choose an appropriate demangling style for your compiler. @xref{c++filt},
for more information on demangling.
+@item --recurse-limit
+@itemx --no-recurse-limit
+@itemx --recursion-limit
+@itemx --no-recursion-limit
+Enables or disables a limit on the amount of recursion performed
+whilst demangling strings. Since the name mangling formats allow for
+an infinite level of recursion it is possible to create strings whose
+decoding will exhaust the amount of stack space available on the host
+machine, triggering a memory fault. The limit tries to prevent this
+from happening by restricting recursion to 2048 levels of nesting.
+
+The default is for this limit to be enabled, but disabling it may be
+necessary in order to demangle truly complicated names. Note however
+that if the recursion limit is disabled then stack exhaustion is
+possible and any bug reports about such an event will be rejected.
+
@item -g
@itemx --debugging
-Display debugging information. This attempts to parse STABS and IEEE
+Display debugging information. This attempts to parse STABS
debugging format information stored in the file and print it out using
-a C like syntax. If neither of these formats are found this option
+a C like syntax. If no STABS debugging was found this option
falls back on the @option{-W} option to print any DWARF information in
the file.
@item -d
@itemx --disassemble
+@itemx --disassemble=@var{symbol}
@cindex disassembling object code
@cindex machine instructions
-Display the assembler mnemonics for the machine instructions from
-@var{objfile}. This option only disassembles those sections which are
-expected to contain instructions.
+Display the assembler mnemonics for the machine instructions from the
+input file. This option only disassembles those sections which are
+expected to contain instructions. If the optional @var{symbol}
+argument is given, then display the assembler mnemonics starting at
+@var{symbol}. If @var{symbol} is a function name then disassembly
+will stop at the end of the function, otherwise it will stop when the
+next symbol is encountered. If there are no matches for @var{symbol}
+then nothing will be displayed.
+
+Note if the @option{--dwarf=follow-links} option has also been enabled
+then any symbol tables in linked debug info files will be read in and
+used when disassembling.
@item -D
@itemx --disassemble-all
of forcing the disassembler to decode pieces of data found in code
sections as if they were instructions.
+Note if the @option{--dwarf=follow-links} option has also been enabled
+then any symbol tables in linked debug info files will be read in and
+used when disassembling.
+
+@item --no-addresses
+When disassembling, don't print addresses on each line or for symbols
+and relocation offsets. In combination with @option{--no-show-raw-insn}
+this may be useful for comparing compiler output.
+
@item --prefix-addresses
When disassembling, print the complete address on each line. This is
the older disassembly format.
special QuarkSE-EM instructions, @option{fpuda} selects the printing
of double precision assist instructions, @option{fpus} selects the
printing of FPU single precision FP instructions, while @option{fpud}
-selects the printing of FPU souble precision FP instructions.
+selects the printing of FPU double precision FP instructions.
Additionally, one can choose to have all the immediates printed in
hexadecimal using @option{hex}. By default, the short immediates are
printed using the decimal representation, while the long immediate
useful when attempting to disassemble thumb code produced by other
compilers.
+For AArch64 targets this switch can be used to set whether instructions are
+disassembled as the most general instruction using the @option{-M no-aliases}
+option or whether instruction notes should be generated as comments in the
+disasssembly using @option{-M notes}.
+
For the x86, some of the options duplicate functions of the @option{-m}
-switch, but allow finer grained control. Multiple selections from the
-following may be specified as a comma separated string.
+switch, but allow finer grained control.
@table @code
@item x86-64
@itemx i386
@itemx addr16
@itemx data32
@itemx data16
-Specify the default address size and operand size. These four options
+Specify the default address size and operand size. These five options
will be overridden if @code{x86-64}, @code{i386} or @code{i8086}
appear later in the option string.
@item suffix
-When in AT&T mode, instructs the disassembler to print a mnemonic
-suffix even when the suffix could be inferred by the operands.
+When in AT&T mode and also for a limited set of instructions when in Intel
+mode, instructs the disassembler to print a mnemonic suffix even when the
+suffix could be inferred by the operands or, for certain instructions, the
+execution mode's defaults.
@end table
For PowerPC, the @option{-M} argument @option{raw} selects
@option{e300}, @option{e500}, @option{e500mc}, @option{e500mc64},
@option{e500x2}, @option{e5500}, @option{e6500}, @option{efs},
@option{power4}, @option{power5}, @option{power6}, @option{power7},
-@option{power8}, @option{power9}, @option{ppc}, @option{ppc32},
-@option{ppc64}, @option{ppc64bridge}, @option{ppcps}, @option{pwr},
-@option{pwr2}, @option{pwr4}, @option{pwr5}, @option{pwr5x},
-@option{pwr6}, @option{pwr7}, @option{pwr8}, @option{pwr9},
+@option{power8}, @option{power9}, @option{power10}, @option{ppc},
+@option{ppc32}, @option{ppc64}, @option{ppc64bridge}, @option{ppcps},
+@option{pwr}, @option{pwr2}, @option{pwr4}, @option{pwr5}, @option{pwr5x},
+@option{pwr6}, @option{pwr7}, @option{pwr8}, @option{pwr9}, @option{pwr10},
@option{pwrx}, @option{titan}, and @option{vle}.
@option{32} and @option{64} modify the default or a prior CPU
selection, disabling and enabling 64-bit insns respectively. In
Display source code intermixed with disassembly, if possible. Implies
@option{-d}.
+@item --source-comment[=@var{txt}]
+@cindex source disassembly
+@cindex disassembly, with source
+Like the @option{-S} option, but all source code lines are displayed
+with a prefix of @var{txt}. Typically @var{txt} will be a comment
+string which can be used to distinguish the assembler code from the
+source code. If @var{txt} is not provided then a default string of
+@var{``# ``} (hash followed by a space), will be used.
+
@item --prefix=@var{prefix}
@cindex Add prefix to absolute paths
Specify @var{prefix} to add to the absolute paths when used with
Display @var{width} bytes on a single line when disassembling
instructions.
-@item -W[lLiaprmfFsoRtUuTgAckK]
-@itemx --dwarf[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames-interp,=str,=loc,=Ranges,=pubtypes,=trace_info,=trace_abbrev,=trace_aranges,=gdb_index,=addr,=cu_index,=links,=follow-links]
+@item --visualize-jumps[=color|=extended-color|=off]
+Visualize jumps that stay inside a function by drawing ASCII art between
+the start and target addresses. The optional @option{=color} argument
+adds color to the output using simple terminal colors. Alternatively
+the @option{=extended-color} argument will add color using 8bit
+colors, but these might not work on all terminals.
+
+If it is necessary to disable the @option{visualize-jumps} option
+after it has previously been enabled then use
+@option{visualize-jumps=off}.
+
+@item -W[lLiaprmfFsoORtUuTgAckK]
+@itemx --dwarf[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames-interp,=str,=str-offsets,=loc,=Ranges,=pubtypes,=trace_info,=trace_abbrev,=trace_aranges,=gdb_index,=addr,=cu_index,=links,=follow-links]
@include debug.options.texi
@item --dwarf-check
Enable additional checks for consistency of Dwarf information.
+@include ctf.options.texi
+
@item -G
@itemx --stabs
@cindex stab
in the symbol table, the @var{sec} number is the section number, the
@var{fl} value are the symbol's flag bits, the @var{ty} number is the
symbol's type, the @var{scl} number is the symbol's storage class and
-the @var{nx} value is the number of auxilary entries associated with
+the @var{nx} value is the number of auxiliary entries associated with
the symbol. The last two fields are the symbol's value and its name.
The other common output format, usually seen with ELF based files,
00000000 g .text 00000000 fred
@end smallexample
-Here the first number is the symbol's value (sometimes refered to as
+Here the first number is the symbol's value (sometimes referred to as
its address). The next field is actually a set of characters and
spaces indicating the flag bits that are set on the symbol. These
characters are described below. Next is the section with which the
@cindex archive contents
@cindex symbol index
-@c man title ranlib generate index to archive.
+@c man title ranlib generate an index to an archive
@smallexample
@c man begin SYNOPSIS ranlib
@kindex size
@cindex section sizes
-@c man title size list section sizes and total size.
+@c man title size list section sizes and total size of binary files
@smallexample
@c man begin SYNOPSIS size
-size [@option{-A}|@option{-B}|@option{--format=}@var{compatibility}]
+size [@option{-A}|@option{-B}|@option{-G}|@option{--format=}@var{compatibility}]
[@option{--help}]
[@option{-d}|@option{-o}|@option{-x}|@option{--radix=}@var{number}]
[@option{--common}]
@c man begin DESCRIPTION size
-The @sc{gnu} @command{size} utility lists the section sizes---and the total
-size---for each of the object or archive files @var{objfile} in its
-argument list. By default, one line of output is generated for each
-object file or each module in an archive.
+The @sc{gnu} @command{size} utility lists the section sizes and the total
+size for each of the binary files @var{objfile} on its argument list.
+By default, one line of output is generated for each file or each
+module if the file is an archive.
-@var{objfile}@dots{} are the object files to be examined.
-If none are specified, the file @code{a.out} will be used.
+@var{objfile}@dots{} are the files to be examined. If none are
+specified, the file @code{a.out} will be used instead.
@c man end
@c man begin OPTIONS size
-The command line options have the following meanings:
+The command-line options have the following meanings:
@table @env
@item -A
@itemx -B
+@itemx -G
@itemx --format=@var{compatibility}
@cindex @command{size} display format
Using one of these options, you can choose whether the output from @sc{gnu}
@command{size} resembles output from System V @command{size} (using @option{-A},
or @option{--format=sysv}), or Berkeley @command{size} (using @option{-B}, or
@option{--format=berkeley}). The default is the one-line format similar to
-Berkeley's.
+Berkeley's. Alternatively, you can choose the GNU format output
+(using @option{-G}, or @option{--format=gnu}), this is similar to
+Berkeley's output format, but sizes are counted differently.
@c Bonus for doc-source readers: you can also say --format=strange (or
@c anything else that starts with 's') for sysv, and --format=boring (or
@c anything else that starts with 'b') for Berkeley.
@command{size}:
@smallexample
$ size --format=Berkeley ranlib size
-text data bss dec hex filename
-294880 81920 11592 388392 5ed28 ranlib
-294880 81920 11888 388688 5ee50 size
+ text data bss dec hex filename
+ 294880 81920 11592 388392 5ed28 ranlib
+ 294880 81920 11888 388688 5ee50 size
+@end smallexample
+
+The Berkeley style output counts read only data in the @code{text}
+column, not in the @code{data} column, the @code{dec} and @code{hex}
+columns both display the sum of the @code{text}, @code{data}, and
+@code{bss} columns in decimal and hexadecimal respectively.
+
+The GNU format counts read only data in the @code{data} column, not
+the @code{text} column, and only displays the sum of the @code{text},
+@code{data}, and @code{bss} columns once, in the @code{total} column.
+The @option{--radix} option can be used to change the number base for
+all columns. Here is the same data displayed with GNU conventions:
+
+@smallexample
+$ size --format=GNU ranlib size
+ text data bss total filename
+ 279880 96920 11592 388392 ranlib
+ 279880 96920 11888 388688 size
@end smallexample
@noindent
@item --common
Print total size of common symbols in each file. When using Berkeley
-format these are included in the bss size.
+or GNU format these are included in the bss size.
@item -t
@itemx --totals
-Show totals of all objects listed (Berkeley format listing mode only).
+Show totals of all objects listed (Berkeley or GNU format mode only).
@item --target=@var{bfdname}
@cindex object code format
@cindex printing strings
@cindex strings, printing
-@c man title strings print the strings of printable characters in files.
+@c man title strings print the sequences of printable characters in files
@smallexample
@c man begin SYNOPSIS strings
Depending upon how the strings program was configured it will default
to either displaying all the printable sequences that it can find in
each file, or only those sequences that are in loadable, initialized
-data sections. If the file type in unrecognizable, or if strings is
+data sections. If the file type is unrecognizable, or if strings is
reading from stdin then it will always display all of the printable
sequences that it can find.
-For backwards compatibility any file that occurs after a command line
+For backwards compatibility any file that occurs after a command-line
option of just @option{-} will also be scanned in full, regardless of
-the presence of any @option{-d} option.
+the presence of any @option{-d} option.
@command{strings} is mainly useful for determining the contents of
non-text files.
@cindex discarding symbols
@cindex symbols, discarding
-@c man title strip Discard symbols from object files.
+@c man title strip discard symbols and other data from object files
@smallexample
@c man begin SYNOPSIS strip
[@option{-w}|@option{--wildcard}]
[@option{-x}|@option{--discard-all}] [@option{-X} |@option{--discard-locals}]
[@option{-R} @var{sectionname} |@option{--remove-section=}@var{sectionname}]
+ [@option{--keep-section=}@var{sectionpattern}]
[@option{--remove-relocations=}@var{sectionpattern}]
[@option{-o} @var{file}] [@option{-p}|@option{--preserve-dates}]
[@option{-D}|@option{--enable-deterministic-archives}]
will remove all sections matching the pattern '.text.*', but will not
remove the section '.text.foo'.
+@item --keep-section=@var{sectionpattern}
+When removing sections from the output file, keep sections that match
+@var{sectionpattern}.
+
@item --remove-relocations=@var{sectionpattern}
Remove relocations from the output file for any section matching
@var{sectionpattern}. This option may be given more than once. Note
for more information.
@item --strip-unneeded
-Remove all symbols that are not needed for relocation processing.
+Remove all symbols that are not needed for relocation processing in
+addition to debugging symbols and sections stripped by
+@option{--strip-debug}.
@item -K @var{symbolname}
@itemx --keep-symbol=@var{symbolname}
@itemx --no-merge-notes
For ELF files, attempt (or do not attempt) to reduce the size of any
SHT_NOTE type sections by removing duplicate notes. The default is to
-attempt this reduction.
+attempt this reduction unless stripping debug or DWO information.
@item -N @var{symbolname}
@itemx --strip-symbol=@var{symbolname}
to create these files is as follows:
@enumerate
-@item Link the executable as normal. Assuming that is is called
+@item Link the executable as normal. Assuming that it is called
@code{foo} then...
@item Run @code{objcopy --only-keep-debug foo foo.dbg} to
create a file containing the debugging info.
@kindex c++filt
@cindex demangling C++ symbols
-@c man title cxxfilt Demangle C++ and Java symbols.
+@c man title cxxfilt demangle C++ and Java symbols
@smallexample
@c man begin SYNOPSIS cxxfilt
[@option{-p}|@option{--no-params}]
[@option{-t}|@option{--types}]
[@option{-i}|@option{--no-verbose}]
+ [@option{-r}|@option{--no-recurse-limit}]
+ [@option{-R}|@option{--recurse-limit}]
[@option{-s} @var{format}|@option{--format=}@var{format}]
[@option{--help}] [@option{--version}] [@var{symbol}@dots{}]
@c man end
names from the standard input instead. All the results are printed on
the standard output. The difference between reading names from the
command line versus reading names from the standard input is that
-command line arguments are expected to be just mangled names and no
+command-line arguments are expected to be just mangled names and no
checking is performed to separate them from surrounding text. Thus
for example:
Do not include implementation details (if any) in the demangled
output.
+@item -r
+@itemx -R
+@itemx --recurse-limit
+@itemx --no-recurse-limit
+@itemx --recursion-limit
+@itemx --no-recursion-limit
+Enables or disables a limit on the amount of recursion performed
+whilst demangling strings. Since the name mangling formats allow for
+an infinite level of recursion it is possible to create strings whose
+decoding will exhaust the amount of stack space available on the host
+machine, triggering a memory fault. The limit tries to prevent this
+from happening by restricting recursion to 2048 levels of nesting.
+
+The default is for this limit to be enabled, but disabling it may be
+necessary in order to demangle truly complicated names. Note however
+that if the recursion limit is disabled then stack exhaustion is
+possible and any bug reports about such an event will be rejected.
+
+The @option{-r} option is a synonym for the
+@option{--no-recurse-limit} option. The @option{-R} option is a
+synonym for the @option{--recurse-limit} option.
+
@item -s @var{format}
@itemx --format=@var{format}
@command{c++filt} can decode various methods of mangling, used by
@kindex addr2line
@cindex address to file name and line number
-@c man title addr2line convert addresses into file names and line numbers.
+@c man title addr2line convert addresses into file names and line numbers
@smallexample
@c man begin SYNOPSIS addr2line
addr2line [@option{-a}|@option{--addresses}]
[@option{-b} @var{bfdname}|@option{--target=}@var{bfdname}]
[@option{-C}|@option{--demangle}[=@var{style}]]
+ [@option{-r}|@option{--no-recurse-limit}]
+ [@option{-R}|@option{--recurse-limit}]
[@option{-e} @var{filename}|@option{--exe=}@var{filename}]
[@option{-f}|@option{--functions}] [@option{-s}|@option{--basename}]
[@option{-i}|@option{--inlines}]
Make the output more human friendly: each location are printed on one line.
If option @option{-i} is specified, lines for all enclosing scopes are
prefixed with @samp{(inlined by)}.
-@end table
-
-@c man end
-
-@ignore
-@c man begin SEEALSO addr2line
-Info entries for @file{binutils}.
-@c man end
-@end ignore
-
-@node nlmconv
-@chapter nlmconv
-
-@command{nlmconv} converts a relocatable object file into a NetWare
-Loadable Module.
-
-@ignore
-@command{nlmconv} currently works with @samp{i386} object
-files in @code{coff}, @sc{elf}, or @code{a.out} format, and @sc{SPARC}
-object files in @sc{elf}, or @code{a.out} format@footnote{
-@command{nlmconv} should work with any @samp{i386} or @sc{sparc} object
-format in the Binary File Descriptor library. It has only been tested
-with the above formats.}.
-@end ignore
-
-@quotation
-@emph{Warning:} @command{nlmconv} is not always built as part of the binary
-utilities, since it is only useful for NLM targets.
-@end quotation
-@c man title nlmconv converts object code into an NLM.
-
-@smallexample
-@c man begin SYNOPSIS nlmconv
-nlmconv [@option{-I} @var{bfdname}|@option{--input-target=}@var{bfdname}]
- [@option{-O} @var{bfdname}|@option{--output-target=}@var{bfdname}]
- [@option{-T} @var{headerfile}|@option{--header-file=}@var{headerfile}]
- [@option{-d}|@option{--debug}] [@option{-l} @var{linker}|@option{--linker=}@var{linker}]
- [@option{-h}|@option{--help}] [@option{-V}|@option{--version}]
- @var{infile} @var{outfile}
-@c man end
-@end smallexample
-
-@c man begin DESCRIPTION nlmconv
-
-@command{nlmconv} converts the relocatable @samp{i386} object file
-@var{infile} into the NetWare Loadable Module @var{outfile}, optionally
-reading @var{headerfile} for NLM header information. For instructions
-on writing the NLM command file language used in header files, see the
-@samp{linkers} section, @samp{NLMLINK} in particular, of the @cite{NLM
-Development and Tools Overview}, which is part of the NLM Software
-Developer's Kit (``NLM SDK''), available from Novell, Inc.
-@command{nlmconv} uses the @sc{gnu} Binary File Descriptor library to read
-@var{infile};
-@ifclear man
-see @ref{BFD,,BFD,ld.info,Using LD}, for more information.
-@end ifclear
-
-@command{nlmconv} can perform a link step. In other words, you can list
-more than one object file for input if you list them in the definitions
-file (rather than simply specifying one input file on the command line).
-In this case, @command{nlmconv} calls the linker for you.
-
-@c man end
-
-@c man begin OPTIONS nlmconv
-
-@table @env
-@item -I @var{bfdname}
-@itemx --input-target=@var{bfdname}
-Object format of the input file. @command{nlmconv} can usually determine
-the format of a given file (so no default is necessary).
-@xref{Target Selection}, for more information.
-
-@item -O @var{bfdname}
-@itemx --output-target=@var{bfdname}
-Object format of the output file. @command{nlmconv} infers the output
-format based on the input format, e.g. for a @samp{i386} input file the
-output format is @samp{nlm32-i386}.
-@xref{Target Selection}, for more information.
-
-@item -T @var{headerfile}
-@itemx --header-file=@var{headerfile}
-Reads @var{headerfile} for NLM header information. For instructions on
-writing the NLM command file language used in header files, see@ see the
-@samp{linkers} section, of the @cite{NLM Development and Tools
-Overview}, which is part of the NLM Software Developer's Kit, available
-from Novell, Inc.
-
-@item -d
-@itemx --debug
-Displays (on standard error) the linker command line used by @command{nlmconv}.
-
-@item -l @var{linker}
-@itemx --linker=@var{linker}
-Use @var{linker} for any linking. @var{linker} can be an absolute or a
-relative pathname.
-
-@item -h
-@itemx --help
-Prints a usage summary.
+@item -r
+@itemx -R
+@itemx --recurse-limit
+@itemx --no-recurse-limit
+@itemx --recursion-limit
+@itemx --no-recursion-limit
+Enables or disables a limit on the amount of recursion performed
+whilst demangling strings. Since the name mangling formats allow for
+an infinite level of recursion it is possible to create strings whose
+decoding will exhaust the amount of stack space available on the host
+machine, triggering a memory fault. The limit tries to prevent this
+from happening by restricting recursion to 2048 levels of nesting.
+
+The default is for this limit to be enabled, but disabling it may be
+necessary in order to demangle truly complicated names. Note however
+that if the recursion limit is disabled then stack exhaustion is
+possible and any bug reports about such an event will be rejected.
+
+The @option{-r} option is a synonym for the
+@option{--no-recurse-limit} option. The @option{-R} option is a
+synonym for the @option{--recurse-limit} option.
+
+Note this option is only effective if the @option{-C} or
+@option{--demangle} option has been enabled.
-@item -V
-@itemx --version
-Prints the version number for @command{nlmconv}.
@end table
@c man end
@ignore
-@c man begin SEEALSO nlmconv
-the Info entries for @file{binutils}.
+@c man begin SEEALSO addr2line
+Info entries for @file{binutils}.
@c man end
@end ignore
utilities, since it is only useful for Windows targets.
@end quotation
-@c man title windmc generates Windows message resources.
+@c man title windmc generates Windows message resources
@smallexample
@c man begin SYNOPSIS windmc
@item -H
@itemx --help
-Displays a list of command line options and then exits.
+Displays a list of command-line options and then exits.
@item -m @var{characters}
@itemx --maxlength @var{characters}
utilities, since it is only useful for Windows targets.
@end quotation
-@c man title windres manipulate Windows resources.
+@c man title windres manipulate Windows resources
@smallexample
@c man begin SYNOPSIS windres
support DLLs.
@end quotation
-@c man title dlltool Create files needed to build and use DLLs.
+@c man title dlltool create files needed to build and use DLLs
@smallexample
@c man begin SYNOPSIS dlltool
@command{dlltool} builds the library file by hand, but it builds the
exports file by creating temporary files containing assembler statements
-and then assembling these. The @option{-S} command line option can be
+and then assembling these. The @option{-S} command-line option can be
used to specify the path to the assembler that dlltool will use,
and the @option{-f} option can be used to pass specific flags to that
assembler. The @option{-n} can be used to prevent dlltool from deleting
@c man begin OPTIONS dlltool
-The command line options have the following meanings:
+The command-line options have the following meanings:
@table @env
@item -f @var{options}
@itemx --as-flags @var{options}
-Specifies any specific command line options to be passed to the
+Specifies any specific command-line options to be passed to the
assembler when building the exports file. This option will work even if
the @option{-S} option is not used. This option only takes one argument,
and if it occurs more than once on the command line, then later
@item -h
@itemx --help
-Displays a list of command line options and then exits.
+Displays a list of command-line options and then exits.
@item -V
@itemx --version
@cindex ELF file information
@kindex readelf
-@c man title readelf Displays information about ELF files.
+@c man title readelf display information about ELF files
@smallexample
@c man begin SYNOPSIS readelf
[@option{-t}|@option{--section-details}]
[@option{-e}|@option{--headers}]
[@option{-s}|@option{--syms}|@option{--symbols}]
- [@option{--dyn-syms}]
+ [@option{--dyn-syms}|@option{--lto-syms}]
+ [@option{--demangle@var{=style}}|@option{--no-demangle}]
+ [@option{--recurse-limit}|@option{--no-recurse-limit}]
[@option{-n}|@option{--notes}]
[@option{-r}|@option{--relocs}]
[@option{-u}|@option{--unwind}]
[@option{-V}|@option{--version-info}]
[@option{-A}|@option{--arch-specific}]
[@option{-D}|@option{--use-dynamic}]
+ [@option{-L}|@option{--lint}|@option{--enable-checks}]
[@option{-x} <number or name>|@option{--hex-dump=}<number or name>]
[@option{-p} <number or name>|@option{--string-dump=}<number or name>]
[@option{-R} <number or name>|@option{--relocated-dump=}<number or name>]
[@option{-z}|@option{--decompress}]
[@option{-c}|@option{--archive-index}]
- [@option{-w[lLiaprmfFsoRtUuTgAckK]}|
- @option{--debug-dump}[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames-interp,=str,=loc,=Ranges,=pubtypes,=trace_info,=trace_abbrev,=trace_aranges,=gdb_index,=addr,=cu_index,=links,=follow-links]]
+ [@option{-w[lLiaprmfFsoORtUuTgAckK]}|
+ @option{--debug-dump}[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames-interp,=str,=str-offsets,=loc,=Ranges,=pubtypes,=trace_info,=trace_abbrev,=trace_aranges,=gdb_index,=addr,=cu_index,=links,=follow-links]]
[@option{--dwarf-depth=@var{n}}]
[@option{--dwarf-start=@var{n}}]
+ [@option{--ctf=}@var{section}]
+ [@option{--ctf-parent=}@var{section}]
+ [@option{--ctf-symbols=}@var{section}]
+ [@option{--ctf-strings=}@var{section}]
[@option{-I}|@option{--histogram}]
[@option{-v}|@option{--version}]
[@option{-W}|@option{--wide}]
+ [@option{-T}|@option{--silent-truncation}]
[@option{-H}|@option{--help}]
@var{elffile}@dots{}
@c man end
Displays the entries in symbol table section of the file, if it has one.
If a symbol has version information associated with it then this is
displayed as well. The version string is displayed as a suffix to the
-symbol name, preceeded by an @@ character. For example
+symbol name, preceded by an @@ character. For example
@samp{foo@@VER_1}. If the version is the default version to be used
when resolving unversioned references to the symbol then it is
-displayed as a suffix preceeded by two @@ characters. For example
+displayed as a suffix preceded by two @@ characters. For example
@samp{foo@@@@VER_2}.
@item --dyn-syms
has one. The output format is the same as the format used by the
@option{--syms} option.
+@item --lto-syms
+@cindex LTO symbol table
+Displays the contents of any LTO symbol tables in the file.
+
+@item -C
+@itemx --demangle[=@var{style}]
+@cindex demangling in nm
+Decode (@dfn{demangle}) low-level symbol names into user-level names.
+This makes C++ function names readable. Different compilers have
+different mangling styles. The optional demangling style argument can
+be used to choose an appropriate demangling style for your
+compiler. @xref{c++filt}, for more information on demangling.
+
+@item --no-demangle
+Do not demangle low-level symbol names. This is the default.
+
+@item --recurse-limit
+@itemx --no-recurse-limit
+@itemx --recursion-limit
+@itemx --no-recursion-limit
+Enables or disables a limit on the amount of recursion performed
+whilst demangling strings. Since the name mangling formats allow for
+an infinite level of recursion it is possible to create strings whose
+decoding will exhaust the amount of stack space available on the host
+machine, triggering a memory fault. The limit tries to prevent this
+from happening by restricting recursion to 2048 levels of nesting.
+
+The default is for this limit to be enabled, but disabling it may be
+necessary in order to demangle truly complicated names. Note however
+that if the recursion limit is disabled then stack exhaustion is
+possible and any bug reports about such an event will be rejected.
+
@item -e
@itemx --headers
Display all the headers in the file. Equivalent to @option{-h -l -S}.
@cindex unwind information
Displays the contents of the file's unwind section, if it has one. Only
the unwind sections for IA64 ELF files, as well as ARM unwind tables
-(@code{.ARM.exidx} / @code{.ARM.extab}) are currently supported.
+(@code{.ARM.exidx} / @code{.ARM.extab}) are currently supported. If
+support is not yet implemented for your architecture you could try
+dumping the contents of the @var{.eh_frames} section using the
+@option{--debug-dump=frames} or @option{--debug-dump=frames-interp}
+options.
@item -d
@itemx --dynamic
When displaying relocations, this option makes @command{readelf}
display the dynamic relocations rather than the static relocations.
+@item -L
+@itemx --lint
+@itemx --enable-checks
+Displays warning messages about possible problems with the file(s)
+being examined. If used on its own then all of the contents of the
+file(s) will be examined. If used with one of the dumping options
+then the warning messages will only be produced for the things being
+displayed.
+
@item -x <number or name>
@itemx --hex-dump=<number or name>
Displays the contents of the indicated section as a hexadecimal bytes.
of binary archives. Performs the same function as the @option{t}
command to @command{ar}, but without using the BFD library. @xref{ar}.
-@item -w[lLiaprmfFsoRtUuTgAckK]
-@itemx --debug-dump[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames-interp,=str,=loc,=Ranges,=pubtypes,=trace_info,=trace_abbrev,=trace_aranges,=gdb_index,=addr,=cu_index,=links,=follow-links]
+@item -w[lLiaprmfFsOoRtUuTgAckK]
+@itemx --debug-dump[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames-interp,=str,=str-offsets,=loc,=Ranges,=pubtypes,=trace_info,=trace_abbrev,=trace_aranges,=gdb_index,=addr,=cu_index,=links,=follow-links]
@include debug.options.texi
+@include ctf.options.texi
+@item --ctf-symbols=@var{section}
+@item --ctf-strings=@var{section}
+Specify the name of another section from which the CTF file can inherit
+strings and symbols. By default, the @code{.symtab} and its linked
+string table are used.
+
+If either of @option{--ctf-symbols} or @option{--ctf-strings} is specified, the
+other must be specified as well.
+
@item -I
@itemx --histogram
Display a histogram of bucket list lengths when displaying the contents
@command{readelf} to print each section header resp. each segment one a
single line, which is far more readable on terminals wider than 80 columns.
+@item -T
+@itemx --silent-truncation
+Normally when readelf is displaying a symbol name, and it has to
+truncate the name to fit into an 80 column display, it will add a
+suffix of @code{[...]} to the name. This command line option
+disables this behaviour, allowing 5 more characters of the name to be
+displayed and restoring the old behaviour of readelf (prior to release
+2.35).
+
@item -H
@itemx --help
-Display the command line options understood by @command{readelf}.
+Display the command-line options understood by @command{readelf}.
@end table
@cindex Update ELF header
@kindex elfedit
-@c man title elfedit Update the ELF header of ELF files.
+@c man title elfedit update ELF header and program property of ELF files
@smallexample
@c man begin SYNOPSIS elfedit
@option{--output-mach=}@var{machine}
@option{--output-type=}@var{type}
@option{--output-osabi=}@var{osabi}
+ @option{--enable-x86-feature=}@var{feature}
+ @option{--disable-x86-feature=}@var{feature}
[@option{-v}|@option{--version}]
[@option{-h}|@option{--help}]
@var{elffile}@dots{}
@c man begin DESCRIPTION elfedit
-@command{elfedit} updates the ELF header of ELF files which have
-the matching ELF machine and file types. The options control how and
-which fields in the ELF header should be updated.
+@command{elfedit} updates the ELF header and program property of ELF
+files which have the matching ELF machine and file types. The options
+control how and which fields in the ELF header and program property
+should be updated.
@var{elffile}@dots{} are the ELF files to be updated. 32-bit and
64-bit ELF files are supported, as are archives containing ELF files.
The long and short forms of options, shown here as alternatives, are
equivalent. At least one of the @option{--output-mach},
-@option{--output-type} and @option{--output-osabi} options must be given.
+@option{--output-type}, @option{--output-osabi},
+@option{--enable-x86-feature} and @option{--disable-x86-feature}
+options must be given.
@table @env
Change the ELF OSABI in the ELF header to @var{osabi}. The
supported ELF OSABI are the same as @option{--input-osabi}.
+@item --enable-x86-feature=@var{feature}
+Set the @var{feature} bit in program property in @var{exec} or @var{dyn}
+ELF files with machine types of @var{i386} or @var{x86-64}. The
+supported features are, @var{ibt} and @var{shstk}.
+
+@item --disable-x86-feature=@var{feature}
+Clear the @var{feature} bit in program property in @var{exec} or
+@var{dyn} ELF files with machine types of @var{i386} or @var{x86-64}.
+The supported features are the same as @option{--enable-x86-feature}.
+
+Note: @option{--enable-x86-feature} and @option{--disable-x86-feature}
+are available only on hosts with @samp{mmap} support.
+
@item -v
@itemx --version
Display the version number of @command{elfedit}.
@item -h
@itemx --help
-Display the command line options understood by @command{elfedit}.
+Display the command-line options understood by @command{elfedit}.
@end table
@enumerate
@item
-command line option: @option{-b} or @option{--target}
+command-line option: @option{-b} or @option{--target}
@item
environment variable @code{GNUTARGET}
@enumerate
@item
-command line options: @option{-I} or @option{--input-target}, or @option{-F} or @option{--target}
+command-line options: @option{-I} or @option{--input-target}, or @option{-F} or @option{--target}
@item
environment variable @code{GNUTARGET}
@enumerate
@item
-command line options: @option{-O} or @option{--output-target}, or @option{-F} or @option{--target}
+command-line options: @option{-O} or @option{--output-target}, or @option{-F} or @option{--target}
@item
the input target (see ``@command{objcopy} and @command{strip} Input Target'' above)
@enumerate
@item
-command line option: @option{--target}
+command-line option: @option{--target}
@item
environment variable @code{GNUTARGET}
@enumerate
@item
-command line option: @option{-m} or @option{--architecture}
+command-line option: @option{-m} or @option{--architecture}
@item
deduced from the input file
deduced from the input file
@end enumerate
+@node debuginfod
+@chapter debuginfod
+@cindex separate debug files
+
+debuginfod is a web service that indexes ELF/DWARF debugging resources
+by build-id and serves them over HTTP.
+
+Binutils can be built with the debuginfod client library
+@code{libdebuginfod} using the @option{--with-debuginfod} configure option.
+This option is enabled by default if @code{libdebuginfod} is installed
+and found at configure time. This allows @command{objdump} and
+@command{readelf} to automatically query debuginfod servers for
+separate debug files when the files are otherwise not found.
+
+debuginfod is packaged with elfutils, starting with version 0.178.
+You can get the latest version from `https://sourceware.org/elfutils/'.
+
@node Reporting Bugs
@chapter Reporting Bugs
@cindex bugs
projects / deliverable / binutils-gdb.git / blobdiff