@copying
@c man begin COPYRIGHT
-Copyright @copyright{} 1991-2019 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
* 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
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}
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 compliant), 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
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
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
@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
[@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}]
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 non-dynamic relocations from the output file for any section
matching @var{sectionpattern}. This option may be given more than
@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
changing the section's flags to @var{flags} in the process. This has
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,
[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}
[@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{-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{--ctf-symbols=}@var{section}]
- [@option{--ctf-strings=}@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{}
@itemx --debugging
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 no STABS debuging was 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.
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.
@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.
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 --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[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]
@include debug.options.texi
[@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
@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.
+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.
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 / thirdparty / binutils-gdb.git / blobdiff