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140 lines
4.0 KiB
XML
140 lines
4.0 KiB
XML
<sect2>
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<title>Description</title>
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<para>The Binutils package contains the gasp, gprof, ld, as, ar, nm, objcopy,
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objdump, ranlib, readelf, size, strings, strip, c++filt and addr2line
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programs</para>
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</sect2>
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<sect2><title>Description</title>
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<sect3><title>gasp</title>
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<para>Gasp is the Assembler Macro Preprocessor.</para>
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</sect3>
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<sect3><title>gprof</title>
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<para>gprof displays call graph profile data.</para>
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</sect3>
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<sect3><title>ld</title>
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<para>ld combines a number of object and archive files, relocates their data
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and ties up symbol references. Often the last step in building a new compiled
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program to run is a call to ld.</para>
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</sect3>
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<sect3><title>as</title>
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<para>as is primarily intended to assemble the output of the GNU C compiler gcc
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for use by the linker ld.</para>
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</sect3>
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<sect3><title>ar</title>
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<para>The ar program creates, modifies, and extracts from archives. An archive
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is a single file holding a collection of other files in a structure that makes
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it possible to retrieve the original individual files (called members of
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the archive).</para>
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</sect3>
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<sect3><title>nm</title>
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<para>nm lists the symbols from object files.</para>
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</sect3>
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<sect3><title>objcopy</title>
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<para>objcopy utility copies the contents of an object file to another. objcopy
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uses the GNU BFD Library to read and write the object files. It can write
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the destination object file in a format different from that of the source
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object file.</para>
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</sect3>
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<sect3><title>objdump</title>
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<para>objdump displays information about one or more object files. The options
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control what particular information to display. This information is mostly
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useful to programmers who are working on the compilation tools, as opposed to
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programmers who just want their program to compile and work.</para>
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</sect3>
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<sect3><title>ranlib</title>
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<para>ranlib generates an index to the contents of an archive, and stores it in
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the archive. The index lists each symbol defined by a member of an archive
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that is a relocatable object file.</para>
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</sect3>
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<sect3><title>readelf</title>
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<para>readelf displays information about elf type binaries.</para>
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</sect3>
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<sect3><title>size</title>
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<para>size lists the section sizes --and the total size-- for each of the
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object files objfile in its argument list. By default, one line of output is
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generated for each object file or each module in an archive.</para>
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</sect3>
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<sect3><title>strings</title>
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<para>For each file given, strings prints the printable character sequences
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that are at least 4 characters long (or the number specified with an
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option to the program) and are followed by an unprintable character. By
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default, it only prints the strings from the initialized and loaded
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sections of object files; for other types of files, it prints the strings
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from the whole file.</para>
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<para>strings is mainly useful for determining the contents of non-text files.</para>
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</sect3>
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<sect3><title>strip</title>
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<para>strip discards all or specific symbols from object files. The list of
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object files may include archives. At least one object file must be
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given. strip modifies the files named in its argument, rather than writing
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modified copies under different names.</para>
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</sect3>
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<sect3><title>c++filt</title>
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<para>The C++ language provides function overloading, which means that it is
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possible to
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write many functions with the same name (providing each takes parameters
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of different types). All C++ function names are encoded into a low-level
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assembly label (this process is known as mangling). The c++filt program
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does the inverse mapping: it decodes (demangles) low-level names into
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user-level names so that the linker can keep these overloaded functions
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from clashing.</para>
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</sect3>
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<sect3><title>addr2line</title>
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<para>addr2line translates program addresses into file names and line numbers.
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Given an address and an executable, it uses the debugging information in
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the executable to figure out which file name and line number are associated
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with a given address.</para>
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</sect3>
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</sect2>
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