Red Hat ENTERPRISE LINUX 3 - DEVELOPER TOOLS GUIDE Manual de usuario descargar pdf (Pagina 14)

10 Chapter 2. Basic Principles of the Tools

how the commands work; it is up to you to supply commands that update the target ﬁle properly. All

make does is execute the commands in the rule you have speciﬁed when the target ﬁle needs updating.

For more details, refer to Using make.

2.11. binutils, the GNU Binary Utilities

binutils, the GNU binary utilities, include ar, nm, objcopy, objdump, ranlib, size, strings,

and strip. For targets that use the ELF ﬁle format, there is also a tool called readelf.

There are three binary utilities, addr2line, windres, and dlltool, that are for use with Cygwin,

the porting layer application for Win32 development. The most important of the binary utilities are

objcopy and objdump.

• objcopy is a tool to convert object and executable ﬁles. It can add and remove sections and sym-

bols, but the most commonly used feature is its ability to change the ﬁle format. For example, it can

convert an ELF or COFF format executable into an S-record or Intel I-Hex format ﬁle. These two

formats are often used in building ROM images for standalone and embedded systems. For more

information, refer to the objcopy Utility section in Using binutils, the Gnu Binary Utilities.

• objdump is a tool to display information about the contents of an object or executable ﬁle. It can

display symbol tables and section headers and it can also act as a disassembler. Objdump also

knows about archives and libraries and can be used to display information on all of the object ﬁles

inside them. For more information, refer to the objdump Utility section in Using binutils, the Gnu

Binary Utilities.

A few of the more useful options for objdump include: -h (to display section headers), -t (to

display symbols), -p (to display private header information) and -d for assembler (to display a

disassembly). -d normally only disassembles sections that are expected to contain instructions. To

disassemble all sections, use -D instead. The option --prefix-addresses can be used to print a

complete address on each line of the disassembler’s output.

2.12. Using info, the Documentation Tools

info provides the sources for documentation for the GNU tools; it requires the following tools, in-

cluding the TeX tools.

Texinfo, texindex, texi2dvi

Documentation formatting tools. Texinfo requires TEX, the free technical documentation format-

ting tool written by Donald Knuth. Refer to Texinfo: The GNU Documentation Format (ISBN:

1-882114 67 1).

makeinfo, info

Online documentation tools.

man pages

Includes documentation on all the tools and programs in this release.

FLEX: A Fast Lexical Analyzer Generator

Generates lexical analyzers suitable for GCC and other compilers. Refer to Flex: The Lexical

Scanner Generator (ISBN: 1-882114 21 3).

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Red Hat ENTERPRISE LINUX 3 - DEVELOPER TOOLS GUIDE Manual de usuario Pagina 14