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author | K. Richard Pixley <rich@cygnus> | 1991-11-13 19:01:53 +0000 |
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committer | K. Richard Pixley <rich@cygnus> | 1991-11-13 19:01:53 +0000 |
commit | c72af7354314de12c2b6e324ee1a3b297685574e (patch) | |
tree | 64d6feeb9a400f12c9a8d28dd32f5b3412c113ba /binutils | |
parent | 6ea296a6fd8a2801539fe6516e2285dabd4f9165 (diff) | |
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diff --git a/binutils/binutils.texi b/binutils/binutils.texi new file mode 100644 index 0000000..d10dd62 --- /dev/null +++ b/binutils/binutils.texi @@ -0,0 +1,737 @@ +\input texinfo +@setfilename binutils.info + +@c start-menu +* Binutils: (binutils). + The GNU binary utilities "ar", "ld", "objdump", "nm", + "size", "strip", and "ranlib". +@c end-menu + +@synindex ky cp +@c +@c This file documents the GNU binary utilities "ar", "ld", "objdump", "nm", +@c "size", "strip", and "ranlib". +@c +@c Copyright (C) 1991 Free Software Foundation, Inc. +@c +@c This text may be freely distributed under the terms of the GNU +@c General Public License. +@c +@c $Id$ +@iftex +@finalout +@c @smallbook +@end iftex +@c @cropmarks +@setchapternewpage odd +@settitle GNU Binary Utilities +@titlepage +@title The GNU Binary Utilities +@subtitle Version 1.90 +@sp 1 +@subtitle October 1991 +@author Roland H. Pesch +@author Cygnus Support +@page + +@tex +\def\$#1${{#1}} % Kluge: collect RCS revision info without $...$ +\xdef\manvers{\$Revision$} % For use in headers, footers too +{\parskip=0pt \hfill Cygnus Support\par \hfill \manvers\par \hfill +\TeX{}info \texinfoversion\par } +@end tex + +@vskip 0pt plus 1filll +Copyright @copyright{} 1991 Free Software Foundation, Inc. + +Permission is granted to make and distribute verbatim copies of +this manual provided the copyright notice and this permission notice +are preserved on all copies. + +Permission is granted to copy and distribute modified versions of this +manual under the conditions for verbatim copying, provided also that +the entire resulting derived work is distributed under the terms of a +permission notice identical to this one. + +Permission is granted to copy and distribute translations of this manual +into another language, under the above conditions for modified versions. +@end titlepage + +@node Top, ar, (dir), (dir) +@chapter Introduction + +@cindex version +This brief manual contains preliminary documentation for the GNU binary +utilities (collectively version 1.90): +@table @code +@item ar +Create, modify, and extract from archives + +@item nm +List symbols from object files + +@item objdump +Display information from object files + +@item ranlib +Generate index to archive contents + +@item size +List section sizes and total size + +@item strip +Discard symbols +@end table + +@ifinfo +Copyright @copyright{} 1991 Free Software Foundation, Inc. + +Permission is granted to make and distribute verbatim copies of +this manual provided the copyright notice and this permission notice +are preserved on all copies. + +@ignore +Permission is granted to process this file through TeX and print the +results, provided the printed document carries a copying permission +notice identical to this one except for the removal of this paragraph +(this paragraph not being relevant to the printed manual). + +@end ignore + +Permission is granted to copy and distribute modified versions of this +manual under the conditions for verbatim copying, provided also that +the entire resulting derived work is distributed under the terms of a +permission notice identical to this one. + +Permission is granted to copy and distribute translations of this manual +into another language, under the above conditions for modified versions. +@end ifinfo + +@menu +* ar:: Create, modify, and extract from archives +* ld:: See ld.info +* nm:: List symbols from object files +* objdump:: Display information from object files +* ranlib:: Generate index to archive contents +* size:: List section sizes and total size +* strip:: Discard symbols +* Index:: +@end menu + +@node ar, ld, Top, Top +@chapter ar + +@kindex ar +@cindex archives +@cindex collections of files +@smallexample + ar [-]@var{p}@var{mod} [ @var{membername} ] @var{archive} @var{files}@dots{} +@end smallexample + +The GNU @code{ar} program creates, modifies, and extracts from +archives. An @dfn{archive} is a single file holding a collection of +other files in a structure that makes it possible to retrieve +the original individual files (called @dfn{members} of the archive). + +The original files' contents, mode (permissions), timestamp, owner, and +group are preserved in the archive, and may be reconstituted on +extraction. + +@cindex name length +GNU @code{ar} can maintain archives whose members have names of any +length; however, depending on how @code{ar} is configured on your +system, a limit on member-name length may be imposed (for compatibility +with archive formats maintained with other tools). If it exists, the +limit is often 15 characters (typical of formats related to a.out) or 16 +characters (typical of formats related to coff). + +@cindex libraries +@code{ar} is considered a binary utility because archives of this sort +are most often used as @dfn{libraries} holding commonly needed +subroutines. + +@cindex symbol index +@code{ar} will create an index to the symbols defined in relocatable +object modules in the archive when you specify the modifier @samp{s}. +Once created, this index is updated in the archive whenever @code{ar} +makes a change to its contents (save for the @samp{q} update operation). +An archive with such an index speeds up linking to the library, and +allows routines in the library to call each other without regard to +their placement in the archive. + +You may use @samp{nm -s} or @samp{nm +print-armap} to list this index +table. If an archive lacks the table, another form of @code{ar} called +@code{ranlib} can be used to add just the table. + +@code{ar} insists on at least two arguments to execute: one +keyletter specifying the @emph{operation} (optionally accompanied by other +keyletters specifying @emph{modifiers}), and the archive name to act on. + +Most operations can also accept further @var{files} arguments, +specifying particular files to operate on. + +GNU @code{ar} allows you to mix the operation code @var{p} and modifier +flags @var{mod} in any order, within the first command-line argument. + +If you wish, you may begin the first command-line argument with a +dash. + +@cindex operations on archive +The @var{p} keyletter specifies what operation to execute; it may be +any of the following, but you must specify only one of them: + +@table @code +@item d +@cindex deleting from archive +@emph{Delete} modules from the archive. Specify the names of modules to +be deleted as @var{files}; the archive is untouched if you +specify no files to delete. + +If you specify the @samp{v} modifier, @code{ar} will list each module +as it is deleted. + +@item m +@cindex moving in archive +Use this operation to @emph{move} members in an archive. + +The ordering of members in an archive can make a difference in how +programs are linked using the library, if a symbol is defined in more +than one member. + +If no modifiers are used with @code{m}, any members you name in the +@var{files} arguments are moved to the @emph{end} of the archive; +you can use the @samp{a}, @samp{b}, or @samp{i} modifiers to move them to a +specified place instead. + +@item p +@cindex printing from archive +@emph{Print} the specified members of the archive, to the standard +output file. If the @samp{v} modifier is specified, show the member +name before copying its contents to standard output. + +If you specify no @var{files}, all the files in the archive are printed. + +@item q +@cindex quick append to archive +@emph{Quick append}; add @var{files} to the end of @var{archive}, +without checking for replacement. + +The modifiers @samp{a}, @samp{b}, and @samp{i} do @emph{not} affect this +operation; new members are always placed at the end of the archive. + +The modifier @samp{v} makes @code{ar} list each file as it is appended. + +Since the point of this operation is speed, the archive's symbol table +index is not updated, even if it already existed; you can use @samp{ar s} or +@code{ranlib} explicitly to update the symbol table index. + +@item r +@cindex replacement in archive +Insert @var{files} into @var{archive} (with @emph{replacement}). This +operation differs from @samp{q} in that any previously existing members +are deleted if their names match those being added. + +If one of the files named in @var{files} doesn't exist, @code{ar} +displays an error message, and leaves undisturbed any existing members +of the archive matching that name. + +By default, new members are added at the end of the file; but you may +use one of the modifiers @samp{a}, @samp{b}, or @samp{i} to request +placement relative to some existing member. + +The modifier @samp{v} used with this operation elicits a line of +output for each file inserted, along with one of the letters @samp{a} or +@samp{r} to indicate whether the file was appended (no old member +deleted) or replaced. + +@item t +@cindex contents of archive +Display a @emph{table} listing the contents of @var{archive}, or those +of the files listed in @var{files} 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. + +If you do not specify any @var{files}, all files in the archive +are listed. + +@cindex repeated names in archive +@cindex name duplication in archive +If there is more than one file with the same name (say, @samp{fie}) in +an archive (say @samp{b.a}), @samp{ar t b.a fie} will list only the +first instance; to see them all, you must ask for a complete +listing---in our example, @samp{ar t b.a}. +@c WRS only; per Gumby, this is implementation-dependent, and in a more +@c recent case in fact works the other way. + +@item x +@cindex extract from archive +@emph{Extract} members (named @var{files}) from the archive. You can +use the @samp{v} modifier with this operation, to request that +@code{ar} list each name as it extracts it. + +If you do not specify any @var{files}, all files in the archive +are extracted. + +@end table + +A number of modifiers (@var{mod}) may immediately follow the @var{p} +keyletter, to specify variations on an operation's behavior: + +@table @code +@item a +@cindex relative placement in archive +Add new files @emph{after} an existing member of the +archive. If you use the modifier @code{a}, the name of an existing archive +member must be present as the @var{membername} argument, before the +@var{archive} specification. + +@item b +Add new files @emph{before} an existing member of the +archive. If you use the modifier @code{b}, the name of an existing archive +member must be present as the @var{membername} argument, before the +@var{archive} specification. (same as @samp{i}). + +@item c +@cindex creating archives +@emph{Create} the archive. The specified @var{archive} is always +created if it didn't exist, when you request an update. But a warning is +issued unless you specify in advance that you expect to create it, by +using this modifier. + +@item i +Insert new files @emph{before} an existing member of the +archive. If you use the modifier @code{i}, the name of an existing archive +member must be present as the @var{membername} argument, before the +@var{archive} specification. (same as @samp{b}). + +@item l +This modifier is accepted but not used. +@c whaffor ar l modifier??? presumably compat; with +@c what???---pesch@@cygnus.com, 25jan91 + +@item o +@cindex dates in archive +Preserve the @emph{original} dates of members when extracting them. If +you do not specify this modifier, files extracted from the archive +will be stamped with the time of extraction. + +@item s +@cindex writing archive index +Write an object-file index into the archive, or update an existing one, +even if no other change is made to the archive. You may use this modifier +flag either with any operation, or alone. Running @samp{ar s} on an +archive is equivalent to running @samp{ranlib} on it. + +@item u +@cindex updating an archive +Normally, @code{ar r}@dots{} inserts all files +listed into the archive. If you would like to insert @emph{only} those +of the files you list that are newer than existing members of the same +names, use this modifier. The @samp{u} modifier is allowed only for the +operation @samp{r} (replace). In particular, the combination @samp{qu} is +not allowed, since checking the timestamps would lose any speed +advantage from the operation @samp{q}. + +@item v +This modifier requests the @emph{verbose} version of an operation. Many +operations display additional information, such as filenames processed, +when the modifier @samp{v} is appended. + +@end table + +@node ld, nm, ar, Top +@chapter ld +@cindex linker +@kindex ld +The GNU linker @code{ld} is now described in a separate manual. +@xref{Top,, Overview,, GLD: the GNU linker}. + +@node nm, objdump, ld, Top +@chapter nm +@cindex symbols +@kindex nm + +@smallexample + nm [ -a | +debug-syms ] [ -g | +extern-only ] + [ -s | +print-armap ] [ -o | +print-file-name ] + [ -n | +numeric-sort ] [ -p | +no-sort ] + [ -r | +reverse-sort ] [ -u | +undefined-only ] + [ +target @var{bfdname} ] + [ @var{objfiles}@dots{} ] +@end smallexample + +GNU @code{nm} will list the symbols from object files @var{objfiles}. + +The long and short forms of options, shown here as alternatives, are +equivalent. + +@table @code +@item @var{objfiles}@dots{} +@kindex a.out +Object files whose symbols are to be listed. If no object files are +listed as arguments, @code{nm} assumes @samp{a.out}. + +@item -a +@itemx +debug-syms +@cindex debugging symbols +Display debugger-only symbols; normally these are not listed. + +@item -g +@itemx +extern-only +@cindex external symbols +Display only external symbols. + +@item -p +@itemx +no-sort +@cindex sorting symbols +Don't bother to sort the symbols in any order; just print them in the +order encountered. + +@item -n +@itemx +numeric-sort +Sort symbols numerically by their addresses, not alphabetically by their +names. + +@item -s +@itemx +print-armap +@cindex symbol index, listing +When listing symbols from archive members, include the index: a mapping +(stored in the archive by @code{ar} or @code{ranlib}) of what modules +contain definitions for what names. + +@item -o +@itemx +print-file-name +@cindex input file name +@cindex file name +@cindex source file name +Precede each symbol by the name of the input file where it was found, +rather than identifying the input file once only before all of its +symbols. + +@item -r +@itemx +reverse-sort +Reverse the sense of the sort (whether numeric or alphabetic); let the +last come first. + +@item +target @var{bfdname} +@c @item +target +@cindex object code format +Specify an object code format other than your system's default format. +@xref{objdump}, for information on listing available formats. +@c FIXME what *does* +target/no arg do? + +@item -u +@itemx +undefined-only +@cindex external symbols +@cindex undefined symbols +Display only undefined symbols (those external to each object file). + +@end table + +@node objdump, ranlib, nm, Top +@chapter objdump + +@cindex object file information +@kindex objdump + +@smallexample + objdump [ -a ] [ -b @var{bfdname} ] [ -d ] [ -f ] + [ -h | +header ] [ -i ] [ -j @var{section} ] [ -l ] + [ -m @var{machine} ] [ -r | +reloc ] [ -s ] + [ -t | +syms ] [ -x ] + @var{objfiles}@dots{} +@end smallexample + +@code{objdump} displays information about one or more object files. +The options control what particular information to display. This +information is mostly useful to programmers who are working on the +compilation tools, as opposed to programmers who just want their +program to compile and work. + +The long and short forms of options, shown here as alternatives, are +equivalent. + +@table @code +@item @var{objfiles}@dots{} +The object files to be examined. When you specify archives, +@code{objdump} shows information on each of the member object files. + +@item -a +@c print_arelt_descr +@cindex archive headers +If any files from @var{objfiles} are archives, display the archive +header information (in a format similar to @samp{ls -l}). Besides the +information you could list with @samp{ar tv}, @samp{objdump -a} shows +the object file format of each archive member. + +@c suggest longname +target or +format or +bfd +@item -b @var{bfdname} +@cindex object code format +You can specify a particular object-code format for your object files as +@var{bfdname}. This may not be necessary; @var{objdump} can +automatically recognize many formats. For example, +@example +objdump -b oasys -m vax -h fu.o +@end example +@noindent +Displays summary information from the section headers (@samp{-h}) of +@file{fu.o}, which is explicitly identified (@samp{-m}) as a Vax object +file in the format produced by Oasys compilers. You can list the +formats available with the @samp{-i} option. + +@item -d +@cindex disassembling object code +@cindex machine instructions +Disassemble. Display the assembler mnemonics for the machine +instructions from @var{objfiles}. + +@item -f +@cindex object file header +File header. Display summary information from the overall header of +each file in @var{objfiles}. + +@item -h +@itemx +header +@cindex section headers +Header. Display summary information from the section headers of the +object file. + +@item -i +@cindex architectures available +@cindex object formats available +Display a list showing all architectures and object formats available +for specification with @code{-b} or @code{-m}. + +@c suggest longname +section +@item -j @var{name} +@cindex section information +Display information only for section @var{name} + +@c suggest longname +label or +linespec +@item -l +@cindex source filenames for object files +Label the display (using debugging information) with the source filename +and line numbers corresponding to the object code shown. + +@c suggest longname +architecture +@item -m @var{machine} +@cindex architecture +Specify the object files @var{objfiles} are for architecture +@var{machine}. You can list available architectures using the @samp{-i} +option. + +@item -r +@itemx +reloc +@cindex relocation entries, in object file +Relocation. Print the relocation entries of the file. + +@item -s +@cindex sections, full contents +@cindex object file sections +Display the full contents of any sections requested. + +@item -t +@itemx +syms +@cindex symbol table entries, printing +Symbol Table. Print the symbol table entries of the file. +This is similar to the information provided by the @samp{nm} program. + +@item -x +@cindex all header information, object file +@cindex header information, all +Display all available header information, including the symbol table and +relocation entries. Using @samp{-x} is equivalent to specifying all of +@samp{-a -f -h -r -t}. + +@end table + +@node ranlib, size, objdump, Top +@chapter ranlib + +@kindex ranlib +@cindex archive contents +@cindex symbol index + +@smallexample + ranlib @var{archive} +@end smallexample + +@code{ranlib} generates an index to the contents of an archive, and +stores it in the archive. The index lists each symbol defined by a +member of an archive that is a relocatable object file. + +You may use @samp{nm -s} or @samp{nm +print-armap} to list this index. + +An archive with such an index speeds up linking to the library, and +allows routines in the library to call each other without regard to +their placement in the archive. + +The GNU @code{ranlib} program is another form of GNU @code{ar}; running +@code{ranlib} is completely equivalent to executing @samp{ar -s}. +@xref{ar}. + +@node size, strip, ranlib, Top +@chapter size + +@kindex size +@cindex section sizes + +@smallexample + size [ -A | -B | +format @var{compatibility} ] + [ +help ] [ -d | -o | -x | +radix @var{number} ] + [ +target @var{bfdname} ] [ -V | +version ] + @var{objfiles}@dots{} +@end smallexample + +The GNU @code{size} utility lists the section sizes---and the total +size---for each of the object files @var{objfiles} in its argument list. +By default, one line of output is generated for each object file or each +module in an archive. + +The command line options have the following meanings: +@table @code +@item @var{objfiles}@dots{} +The object files to be examined. + +@item -A +@itemx -B +@itemx +format @var{compatibility} +@cindex size display format +Using one of these options, you can choose whether the output from GNU +@code{size} resembles output from System V @code{size} (using @samp{-A}, +or @samp{+format sysv}), or Berkeley @code{size} (using @samp{-B}, or +@samp{+format berkeley}). The default is the one-line format similar to +Berkeley's. +@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. + +Here is an example of the Berkeley (default) format of output from +@code{size}: +@smallexample + eg$ size +format Berkeley ranlib size +text data bss dec hex filename +294880 81920 11592 388392 5ed28 ranlib +294880 81920 11888 388688 5ee50 size +@end smallexample + +@noindent +This is the same data, but displayed closer to System V conventions: + +@smallexample + eg$ size +format SysV ranlib size +ranlib : +section size addr +.text 294880 8192 +.data 81920 303104 +.bss 11592 385024 +Total 388392 + + +size : +section size addr +.text 294880 8192 +.data 81920 303104 +.bss 11888 385024 +Total 388688 +@end smallexample + +@item +help +Show a summary of acceptable arguments and options. + +@item -d +@itemx -o +@itemx -x +@itemx +radix @var{number} +@cindex size number format +@cindex radix for section sizes +Using one of these options, you can control whether the size of each +section is given in decimal (@samp{-d}, or @samp{+radix 10}); octal +(@samp{-o}, or @samp{+radix 8}); or hexadecimal (@samp{-x}, or +@samp{+radix 16}). In @samp{+radix @var{number}}, only the three +values (8, 10, 16) are supported. The total size is always given in two +radices; decimal and hexadecimal for @samp{-d} or @samp{-x} output, or +octal and hexadecimal if you're using @samp{-o}. + +@item +target @var{bfdname} +@cindex object code format +You can specify a particular object-code format for @var{objfiles} as +@var{bfdname}. This may not be necessary; @var{size} can +automatically recognize many formats. @xref{objdump}, for information +on listing available formats. + +@item -V +@itemx +version +Display version number information on @code{size} itself. + +@end table + +@node strip, Index, size, Top +@chapter strip + +@kindex strip +@cindex removing symbols +@cindex discarding symbols + +@smallexample + strip [ -s | +strip-all ] [ -g | -S | +strip-debug ] + [ -x | +discard-all ] [ -X | +discard-locals ] + [ -T @var{bfdname} ] + @var{objfiles}@dots{} +@end smallexample + +GNU @code{strip} will discard all symbols from object files +@var{objfiles}, if no options are specified; or only certain symbols, +depending on its command-line options. + +@code{strip} will not execute unless at least one object file is listed. + +@quotation +@emph{WARNING:} @code{strip} modifies the files named in its argument, +rather than writing modified copies under different names. +@end quotation + +The long and short forms of options, shown here as alternatives, are +equivalent. + +@table @code +@item -s +@itemx +strip-all +@cindex all symbols, discarding +This is the default case: strip all symbol entries from @var{objfiles}. + +@item -g +@itemx -S +@itemx +strip-debug +@cindex debugging symbols, discarding +Discard only debugging symbol information from @var{objfiles}. + +@item -x +@itemx +discard-all +@cindex local symbols, discarding +Discard all symbols local to each file in @var{objfiles}. +@emph{WARNING:} Note that @code{+discard-all} discards only @emph{local} +symbols, in spite of its name. + +@item -X +@itemx +discard-locals +Discard local symbols starting with @samp{L} from each file in +@var{objfiles}. (Some compilers produce internally-used symbols that +begin with @samp{L}.) + +@item -T @var{bfdname} +@cindex object code format +You can specify a particular object-code format @var{bfdname} for +@var{objfiles}. This may not be necessary; @var{strip} can automatically +recognize many formats. @xref{objdump}, for information on listing +available formats. +@end table + +@node Index, , strip, Top +@unnumbered Index + +@printindex cp + +@contents +@bye |