594 lines
20 KiB
Groff
594 lines
20 KiB
Groff
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.\" Automatically generated by Pod::Man 2.22 (Pod::Simple 3.13)
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.\"
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.\" Standard preamble:
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.\" ========================================================================
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.de Sp \" Vertical space (when we can't use .PP)
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.if t .sp .5v
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.de Vb \" Begin verbatim text
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.ft CW
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.nf
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.de Ve \" End verbatim text
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.ft R
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.fi
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..
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.\" Set up some character translations and predefined strings. \*(-- will
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.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left
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.\" double quote, and \*(R" will give a right double quote. \*(C+ will
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.\" give a nicer C++. Capital omega is used to do unbreakable dashes and
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.\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff,
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.\" nothing in troff, for use with C<>.
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.tr \(*W-
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.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
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.ie n \{\
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. ds -- \(*W-
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. ds PI pi
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. if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch
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. if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch
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. ds L" ""
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. ds R" ""
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. ds C` ""
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. ds C' ""
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'br\}
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.el\{\
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. ds -- \|\(em\|
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. ds PI \(*p
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. ds R" ''
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'br\}
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.\"
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.\" Escape single quotes in literal strings from groff's Unicode transform.
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.ie \n(.g .ds Aq \(aq
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.el .ds Aq '
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.\"
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.\" If the F register is turned on, we'll generate index entries on stderr for
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.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
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.\" entries marked with X<> in POD. Of course, you'll have to process the
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.\" output yourself in some meaningful fashion.
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.ie \nF \{\
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. de IX
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. tm Index:\\$1\t\\n%\t"\\$2"
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..
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. nr % 0
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. rr F
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.\}
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.el \{\
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. de IX
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..
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.\}
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.\"
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.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
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.\" Fear. Run. Save yourself. No user-serviceable parts.
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. \" fudge factors for nroff and troff
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.if n \{\
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. ds #H 0
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. ds #V .8m
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. ds #F .3m
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. ds #[ \f1
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. ds #] \fP
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.\}
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.if t \{\
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. ds #H ((1u-(\\\\n(.fu%2u))*.13m)
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. ds #V .6m
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. ds #F 0
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. ds #[ \&
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. ds #] \&
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.\}
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. \" simple accents for nroff and troff
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.if n \{\
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. ds ' \&
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. ds ` \&
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. ds ^ \&
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. ds , \&
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. ds ~ ~
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. ds /
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.\}
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.if t \{\
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. ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u"
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. ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u'
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. ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u'
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. ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u'
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. ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u'
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. ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u'
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.\}
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. \" troff and (daisy-wheel) nroff accents
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.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V'
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.ds 8 \h'\*(#H'\(*b\h'-\*(#H'
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.ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#]
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.ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H'
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.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u'
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.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#]
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.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#]
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.ds ae a\h'-(\w'a'u*4/10)'e
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.ds Ae A\h'-(\w'A'u*4/10)'E
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. \" corrections for vroff
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.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
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.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u'
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. \" for low resolution devices (crt and lpr)
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.if \n(.H>23 .if \n(.V>19 \
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\{\
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. ds : e
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. ds 8 ss
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. ds o a
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. ds d- d\h'-1'\(ga
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. ds D- D\h'-1'\(hy
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. ds th \o'bp'
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. ds Th \o'LP'
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. ds ae ae
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. ds Ae AE
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.\}
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.rm #[ #] #H #V #F C
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.\" ========================================================================
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.\"
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.IX Title "NM 1"
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.TH NM 1 "2019-12-09" "binutils-2.33.1" "GNU Development Tools"
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.\" For nroff, turn off justification. Always turn off hyphenation; it makes
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.\" way too many mistakes in technical documents.
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.if n .ad l
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.nh
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.SH "NAME"
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nm \- list symbols from object files
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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nm [\fB\-A\fR|\fB\-o\fR|\fB\-\-print\-file\-name\fR] [\fB\-a\fR|\fB\-\-debug\-syms\fR]
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[\fB\-B\fR|\fB\-\-format=bsd\fR] [\fB\-C\fR|\fB\-\-demangle\fR[=\fIstyle\fR]]
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[\fB\-D\fR|\fB\-\-dynamic\fR] [\fB\-f\fR\fIformat\fR|\fB\-\-format=\fR\fIformat\fR]
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[\fB\-g\fR|\fB\-\-extern\-only\fR] [\fB\-h\fR|\fB\-\-help\fR]
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[\fB\-l\fR|\fB\-\-line\-numbers\fR] [\fB\-\-inlines\fR]
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[\fB\-n\fR|\fB\-v\fR|\fB\-\-numeric\-sort\fR]
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[\fB\-P\fR|\fB\-\-portability\fR] [\fB\-p\fR|\fB\-\-no\-sort\fR]
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[\fB\-r\fR|\fB\-\-reverse\-sort\fR] [\fB\-S\fR|\fB\-\-print\-size\fR]
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[\fB\-s\fR|\fB\-\-print\-armap\fR] [\fB\-t\fR \fIradix\fR|\fB\-\-radix=\fR\fIradix\fR]
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[\fB\-u\fR|\fB\-\-undefined\-only\fR] [\fB\-V\fR|\fB\-\-version\fR]
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[\fB\-X 32_64\fR] [\fB\-\-defined\-only\fR] [\fB\-\-no\-demangle\fR]
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[\fB\-\-plugin\fR \fIname\fR]
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[\fB\-\-no\-recurse\-limit\fR|\fB\-\-recurse\-limit\fR]]
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[\fB\-\-size\-sort\fR] [\fB\-\-special\-syms\fR]
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[\fB\-\-synthetic\fR] [\fB\-\-with\-symbol\-versions\fR] [\fB\-\-target=\fR\fIbfdname\fR]
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[\fIobjfile\fR...]
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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\&\s-1GNU\s0 \fBnm\fR lists the symbols from object files \fIobjfile\fR....
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If no object files are listed as arguments, \fBnm\fR assumes the file
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\&\fIa.out\fR.
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.PP
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For each symbol, \fBnm\fR shows:
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.IP "\(bu" 4
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The symbol value, in the radix selected by options (see below), or
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hexadecimal by default.
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.IP "\(bu" 4
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The symbol type. At least the following types are used; others are, as
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well, depending on the object file format. If lowercase, the symbol is
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usually local; if uppercase, the symbol is global (external). There
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are however a few lowercase symbols that are shown for special global
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symbols (\f(CW\*(C`u\*(C'\fR, \f(CW\*(C`v\*(C'\fR and \f(CW\*(C`w\*(C'\fR).
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.RS 4
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.ie n .IP """A""" 4
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.el .IP "\f(CWA\fR" 4
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.IX Item "A"
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The symbol's value is absolute, and will not be changed by further
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linking.
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.ie n .IP """B""" 4
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.el .IP "\f(CWB\fR" 4
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.IX Item "B"
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.PD 0
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.ie n .IP """b""" 4
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.el .IP "\f(CWb\fR" 4
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.IX Item "b"
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.PD
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The symbol is in the \s-1BSS\s0 data section. This section typically
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contains zero-initialized or uninitialized data, although the exact
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behavior is system dependent.
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.ie n .IP """C""" 4
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.el .IP "\f(CWC\fR" 4
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.IX Item "C"
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The symbol is common. Common symbols are uninitialized data. When
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linking, multiple common symbols may appear with the same name. If the
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symbol is defined anywhere, the common symbols are treated as undefined
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references.
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.ie n .IP """D""" 4
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.el .IP "\f(CWD\fR" 4
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.IX Item "D"
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.PD 0
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.ie n .IP """d""" 4
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.el .IP "\f(CWd\fR" 4
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.IX Item "d"
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.PD
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The symbol is in the initialized data section.
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.ie n .IP """G""" 4
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.el .IP "\f(CWG\fR" 4
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.IX Item "G"
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.PD 0
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.ie n .IP """g""" 4
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.el .IP "\f(CWg\fR" 4
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.IX Item "g"
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.PD
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The symbol is in an initialized data section for small objects. Some
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object file formats permit more efficient access to small data objects,
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such as a global int variable as opposed to a large global array.
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.ie n .IP """i""" 4
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.el .IP "\f(CWi\fR" 4
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.IX Item "i"
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For \s-1PE\s0 format files this indicates that the symbol is in a section
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specific to the implementation of DLLs. For \s-1ELF\s0 format files this
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indicates that the symbol is an indirect function. This is a \s-1GNU\s0
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extension to the standard set of \s-1ELF\s0 symbol types. It indicates a
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symbol which if referenced by a relocation does not evaluate to its
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address, but instead must be invoked at runtime. The runtime
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execution will then return the value to be used in the relocation.
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.ie n .IP """I""" 4
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.el .IP "\f(CWI\fR" 4
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.IX Item "I"
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The symbol is an indirect reference to another symbol.
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.ie n .IP """N""" 4
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.el .IP "\f(CWN\fR" 4
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.IX Item "N"
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The symbol is a debugging symbol.
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.ie n .IP """n""" 4
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.el .IP "\f(CWn\fR" 4
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.IX Item "n"
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The symbol is in the read-only data section.
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.ie n .IP """p""" 4
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.el .IP "\f(CWp\fR" 4
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.IX Item "p"
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The symbol is in a stack unwind section.
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.ie n .IP """R""" 4
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.el .IP "\f(CWR\fR" 4
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.IX Item "R"
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.PD 0
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.ie n .IP """r""" 4
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.el .IP "\f(CWr\fR" 4
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.IX Item "r"
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.PD
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The symbol is in a read only data section.
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.ie n .IP """S""" 4
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.el .IP "\f(CWS\fR" 4
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.IX Item "S"
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.PD 0
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.ie n .IP """s""" 4
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.el .IP "\f(CWs\fR" 4
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.IX Item "s"
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.PD
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The symbol is in an uninitialized or zero-initialized data section
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for small objects.
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.ie n .IP """T""" 4
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.el .IP "\f(CWT\fR" 4
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.IX Item "T"
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.PD 0
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.ie n .IP """t""" 4
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.el .IP "\f(CWt\fR" 4
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.IX Item "t"
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.PD
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The symbol is in the text (code) section.
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.ie n .IP """U""" 4
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.el .IP "\f(CWU\fR" 4
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.IX Item "U"
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The symbol is undefined.
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.ie n .IP """u""" 4
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.el .IP "\f(CWu\fR" 4
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.IX Item "u"
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The symbol is a unique global symbol. This is a \s-1GNU\s0 extension to the
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standard set of \s-1ELF\s0 symbol bindings. For such a symbol the dynamic linker
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will make sure that in the entire process there is just one symbol with
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this name and type in use.
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.ie n .IP """V""" 4
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.el .IP "\f(CWV\fR" 4
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.IX Item "V"
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.PD 0
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.ie n .IP """v""" 4
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.el .IP "\f(CWv\fR" 4
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.IX Item "v"
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.PD
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The symbol is a weak object. When a weak defined symbol is linked with
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a normal defined symbol, the normal defined symbol is used with no error.
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When a weak undefined symbol is linked and the symbol is not defined,
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the value of the weak symbol becomes zero with no error. On some
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systems, uppercase indicates that a default value has been specified.
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.ie n .IP """W""" 4
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.el .IP "\f(CWW\fR" 4
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.IX Item "W"
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.PD 0
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.ie n .IP """w""" 4
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.el .IP "\f(CWw\fR" 4
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.IX Item "w"
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.PD
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The symbol is a weak symbol that has not been specifically tagged as a
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weak object symbol. When a weak defined symbol is linked with a normal
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defined symbol, the normal defined symbol is used with no error.
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When a weak undefined symbol is linked and the symbol is not defined,
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the value of the symbol is determined in a system-specific manner without
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error. On some systems, uppercase indicates that a default value has been
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specified.
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.ie n .IP """\-""" 4
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.el .IP "\f(CW\-\fR" 4
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.IX Item "-"
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The symbol is a stabs symbol in an a.out object file. In this case, the
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next values printed are the stabs other field, the stabs desc field, and
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the stab type. Stabs symbols are used to hold debugging information.
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.ie n .IP """?""" 4
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||
|
|
.el .IP "\f(CW?\fR" 4
|
||
|
|
.IX Item "?"
|
||
|
|
The symbol type is unknown, or object file format specific.
|
||
|
|
.RE
|
||
|
|
.RS 4
|
||
|
|
.RE
|
||
|
|
.IP "\(bu" 4
|
||
|
|
The symbol name.
|
||
|
|
.SH "OPTIONS"
|
||
|
|
.IX Header "OPTIONS"
|
||
|
|
The long and short forms of options, shown here as alternatives, are
|
||
|
|
equivalent.
|
||
|
|
.IP "\fB\-A\fR" 4
|
||
|
|
.IX Item "-A"
|
||
|
|
.PD 0
|
||
|
|
.IP "\fB\-o\fR" 4
|
||
|
|
.IX Item "-o"
|
||
|
|
.IP "\fB\-\-print\-file\-name\fR" 4
|
||
|
|
.IX Item "--print-file-name"
|
||
|
|
.PD
|
||
|
|
Precede each symbol by the name of the input file (or archive member)
|
||
|
|
in which it was found, rather than identifying the input file once only,
|
||
|
|
before all of its symbols.
|
||
|
|
.IP "\fB\-a\fR" 4
|
||
|
|
.IX Item "-a"
|
||
|
|
.PD 0
|
||
|
|
.IP "\fB\-\-debug\-syms\fR" 4
|
||
|
|
.IX Item "--debug-syms"
|
||
|
|
.PD
|
||
|
|
Display all symbols, even debugger-only symbols; normally these are not
|
||
|
|
listed.
|
||
|
|
.IP "\fB\-B\fR" 4
|
||
|
|
.IX Item "-B"
|
||
|
|
The same as \fB\-\-format=bsd\fR (for compatibility with the \s-1MIPS\s0 \fBnm\fR).
|
||
|
|
.IP "\fB\-C\fR" 4
|
||
|
|
.IX Item "-C"
|
||
|
|
.PD 0
|
||
|
|
.IP "\fB\-\-demangle[=\fR\fIstyle\fR\fB]\fR" 4
|
||
|
|
.IX Item "--demangle[=style]"
|
||
|
|
.PD
|
||
|
|
Decode (\fIdemangle\fR) low-level symbol names into user-level names.
|
||
|
|
Besides removing any initial underscore prepended by the system, 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.
|
||
|
|
.IP "\fB\-\-no\-demangle\fR" 4
|
||
|
|
.IX Item "--no-demangle"
|
||
|
|
Do not demangle low-level symbol names. This is the default.
|
||
|
|
.IP "\fB\-\-recurse\-limit\fR" 4
|
||
|
|
.IX Item "--recurse-limit"
|
||
|
|
.PD 0
|
||
|
|
.IP "\fB\-\-no\-recurse\-limit\fR" 4
|
||
|
|
.IX Item "--no-recurse-limit"
|
||
|
|
.IP "\fB\-\-recursion\-limit\fR" 4
|
||
|
|
.IX Item "--recursion-limit"
|
||
|
|
.IP "\fB\-\-no\-recursion\-limit\fR" 4
|
||
|
|
.IX Item "--no-recursion-limit"
|
||
|
|
.PD
|
||
|
|
Enables or disables a limit on the amount of recursion performed
|
||
|
|
whilst demangling strings. Since the name mangling formats allow for
|
||
|
|
an inifinite 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.
|
||
|
|
.Sp
|
||
|
|
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.
|
||
|
|
.IP "\fB\-D\fR" 4
|
||
|
|
.IX Item "-D"
|
||
|
|
.PD 0
|
||
|
|
.IP "\fB\-\-dynamic\fR" 4
|
||
|
|
.IX Item "--dynamic"
|
||
|
|
.PD
|
||
|
|
Display the dynamic symbols rather than the normal symbols. This is
|
||
|
|
only meaningful for dynamic objects, such as certain types of shared
|
||
|
|
libraries.
|
||
|
|
.IP "\fB\-f\fR \fIformat\fR" 4
|
||
|
|
.IX Item "-f format"
|
||
|
|
.PD 0
|
||
|
|
.IP "\fB\-\-format=\fR\fIformat\fR" 4
|
||
|
|
.IX Item "--format=format"
|
||
|
|
.PD
|
||
|
|
Use the output format \fIformat\fR, which can be \f(CW\*(C`bsd\*(C'\fR,
|
||
|
|
\&\f(CW\*(C`sysv\*(C'\fR, or \f(CW\*(C`posix\*(C'\fR. The default is \f(CW\*(C`bsd\*(C'\fR.
|
||
|
|
Only the first character of \fIformat\fR is significant; it can be
|
||
|
|
either upper or lower case.
|
||
|
|
.IP "\fB\-g\fR" 4
|
||
|
|
.IX Item "-g"
|
||
|
|
.PD 0
|
||
|
|
.IP "\fB\-\-extern\-only\fR" 4
|
||
|
|
.IX Item "--extern-only"
|
||
|
|
.PD
|
||
|
|
Display only external symbols.
|
||
|
|
.IP "\fB\-h\fR" 4
|
||
|
|
.IX Item "-h"
|
||
|
|
.PD 0
|
||
|
|
.IP "\fB\-\-help\fR" 4
|
||
|
|
.IX Item "--help"
|
||
|
|
.PD
|
||
|
|
Show a summary of the options to \fBnm\fR and exit.
|
||
|
|
.IP "\fB\-l\fR" 4
|
||
|
|
.IX Item "-l"
|
||
|
|
.PD 0
|
||
|
|
.IP "\fB\-\-line\-numbers\fR" 4
|
||
|
|
.IX Item "--line-numbers"
|
||
|
|
.PD
|
||
|
|
For each symbol, use debugging information to try to find a filename and
|
||
|
|
line number. For a defined symbol, look for the line number of the
|
||
|
|
address of the symbol. For an undefined symbol, look for the line
|
||
|
|
number of a relocation entry which refers to the symbol. If line number
|
||
|
|
information can be found, print it after the other symbol information.
|
||
|
|
.IP "\fB\-\-inlines\fR" 4
|
||
|
|
.IX Item "--inlines"
|
||
|
|
When option \fB\-l\fR is active, if the address belongs to a
|
||
|
|
function that was inlined, then this option causes the source
|
||
|
|
information for all enclosing scopes back to the first non-inlined
|
||
|
|
function to be printed as well. For example, if \f(CW\*(C`main\*(C'\fR inlines
|
||
|
|
\&\f(CW\*(C`callee1\*(C'\fR which inlines \f(CW\*(C`callee2\*(C'\fR, and address is from
|
||
|
|
\&\f(CW\*(C`callee2\*(C'\fR, the source information for \f(CW\*(C`callee1\*(C'\fR and \f(CW\*(C`main\*(C'\fR
|
||
|
|
will also be printed.
|
||
|
|
.IP "\fB\-n\fR" 4
|
||
|
|
.IX Item "-n"
|
||
|
|
.PD 0
|
||
|
|
.IP "\fB\-v\fR" 4
|
||
|
|
.IX Item "-v"
|
||
|
|
.IP "\fB\-\-numeric\-sort\fR" 4
|
||
|
|
.IX Item "--numeric-sort"
|
||
|
|
.PD
|
||
|
|
Sort symbols numerically by their addresses, rather than alphabetically
|
||
|
|
by their names.
|
||
|
|
.IP "\fB\-p\fR" 4
|
||
|
|
.IX Item "-p"
|
||
|
|
.PD 0
|
||
|
|
.IP "\fB\-\-no\-sort\fR" 4
|
||
|
|
.IX Item "--no-sort"
|
||
|
|
.PD
|
||
|
|
Do not bother to sort the symbols in any order; print them in the order
|
||
|
|
encountered.
|
||
|
|
.IP "\fB\-P\fR" 4
|
||
|
|
.IX Item "-P"
|
||
|
|
.PD 0
|
||
|
|
.IP "\fB\-\-portability\fR" 4
|
||
|
|
.IX Item "--portability"
|
||
|
|
.PD
|
||
|
|
Use the \s-1POSIX\s0.2 standard output format instead of the default format.
|
||
|
|
Equivalent to \fB\-f posix\fR.
|
||
|
|
.IP "\fB\-r\fR" 4
|
||
|
|
.IX Item "-r"
|
||
|
|
.PD 0
|
||
|
|
.IP "\fB\-\-reverse\-sort\fR" 4
|
||
|
|
.IX Item "--reverse-sort"
|
||
|
|
.PD
|
||
|
|
Reverse the order of the sort (whether numeric or alphabetic); let the
|
||
|
|
last come first.
|
||
|
|
.IP "\fB\-S\fR" 4
|
||
|
|
.IX Item "-S"
|
||
|
|
.PD 0
|
||
|
|
.IP "\fB\-\-print\-size\fR" 4
|
||
|
|
.IX Item "--print-size"
|
||
|
|
.PD
|
||
|
|
Print both value and size of defined symbols for the \f(CW\*(C`bsd\*(C'\fR output style.
|
||
|
|
This option has no effect for object formats that do not record symbol
|
||
|
|
sizes, unless \fB\-\-size\-sort\fR is also used in which case a
|
||
|
|
calculated size is displayed.
|
||
|
|
.IP "\fB\-s\fR" 4
|
||
|
|
.IX Item "-s"
|
||
|
|
.PD 0
|
||
|
|
.IP "\fB\-\-print\-armap\fR" 4
|
||
|
|
.IX Item "--print-armap"
|
||
|
|
.PD
|
||
|
|
When listing symbols from archive members, include the index: a mapping
|
||
|
|
(stored in the archive by \fBar\fR or \fBranlib\fR) of which modules
|
||
|
|
contain definitions for which names.
|
||
|
|
.IP "\fB\-t\fR \fIradix\fR" 4
|
||
|
|
.IX Item "-t radix"
|
||
|
|
.PD 0
|
||
|
|
.IP "\fB\-\-radix=\fR\fIradix\fR" 4
|
||
|
|
.IX Item "--radix=radix"
|
||
|
|
.PD
|
||
|
|
Use \fIradix\fR as the radix for printing the symbol values. It must be
|
||
|
|
\&\fBd\fR for decimal, \fBo\fR for octal, or \fBx\fR for hexadecimal.
|
||
|
|
.IP "\fB\-u\fR" 4
|
||
|
|
.IX Item "-u"
|
||
|
|
.PD 0
|
||
|
|
.IP "\fB\-\-undefined\-only\fR" 4
|
||
|
|
.IX Item "--undefined-only"
|
||
|
|
.PD
|
||
|
|
Display only undefined symbols (those external to each object file).
|
||
|
|
.IP "\fB\-V\fR" 4
|
||
|
|
.IX Item "-V"
|
||
|
|
.PD 0
|
||
|
|
.IP "\fB\-\-version\fR" 4
|
||
|
|
.IX Item "--version"
|
||
|
|
.PD
|
||
|
|
Show the version number of \fBnm\fR and exit.
|
||
|
|
.IP "\fB\-X\fR" 4
|
||
|
|
.IX Item "-X"
|
||
|
|
This option is ignored for compatibility with the \s-1AIX\s0 version of
|
||
|
|
\&\fBnm\fR. It takes one parameter which must be the string
|
||
|
|
\&\fB32_64\fR. The default mode of \s-1AIX\s0 \fBnm\fR corresponds
|
||
|
|
to \fB\-X 32\fR, which is not supported by \s-1GNU\s0 \fBnm\fR.
|
||
|
|
.IP "\fB\-\-defined\-only\fR" 4
|
||
|
|
.IX Item "--defined-only"
|
||
|
|
Display only defined symbols for each object file.
|
||
|
|
.IP "\fB\-\-plugin\fR \fIname\fR" 4
|
||
|
|
.IX Item "--plugin name"
|
||
|
|
Load the plugin called \fIname\fR to add support for extra target
|
||
|
|
types. This option is only available if the toolchain has been built
|
||
|
|
with plugin support enabled.
|
||
|
|
.Sp
|
||
|
|
If \fB\-\-plugin\fR is not provided, but plugin support has been
|
||
|
|
enabled then \fBnm\fR iterates over the files in
|
||
|
|
\&\fI${libdir}/bfd\-plugins\fR in alphabetic order and the first
|
||
|
|
plugin that claims the object in question is used.
|
||
|
|
.Sp
|
||
|
|
Please note that this plugin search directory is \fInot\fR the one
|
||
|
|
used by \fBld\fR's \fB\-plugin\fR option. In order to make
|
||
|
|
\&\fBnm\fR use the linker plugin it must be copied into the
|
||
|
|
\&\fI${libdir}/bfd\-plugins\fR directory. For \s-1GCC\s0 based compilations
|
||
|
|
the linker plugin is called \fIliblto_plugin.so.0.0.0\fR. For Clang
|
||
|
|
based compilations it is called \fILLVMgold.so\fR. The \s-1GCC\s0 plugin
|
||
|
|
is always backwards compatible with earlier versions, so it is
|
||
|
|
sufficient to just copy the newest one.
|
||
|
|
.IP "\fB\-\-size\-sort\fR" 4
|
||
|
|
.IX Item "--size-sort"
|
||
|
|
Sort symbols by size. For \s-1ELF\s0 objects symbol sizes are read from the
|
||
|
|
\&\s-1ELF\s0, for other object types the symbol sizes are computed as the
|
||
|
|
difference between the value of the symbol and the value of the symbol
|
||
|
|
with the next higher value. If the \f(CW\*(C`bsd\*(C'\fR output format is used
|
||
|
|
the size of the symbol is printed, rather than the value, and
|
||
|
|
\&\fB\-S\fR must be used in order both size and value to be printed.
|
||
|
|
.IP "\fB\-\-special\-syms\fR" 4
|
||
|
|
.IX Item "--special-syms"
|
||
|
|
Display symbols which have a target-specific special meaning. These
|
||
|
|
symbols are usually used by the target for some special processing and
|
||
|
|
are not normally helpful when included in the normal symbol lists.
|
||
|
|
For example for \s-1ARM\s0 targets this option would skip the mapping symbols
|
||
|
|
used to mark transitions between \s-1ARM\s0 code, \s-1THUMB\s0 code and data.
|
||
|
|
.IP "\fB\-\-synthetic\fR" 4
|
||
|
|
.IX Item "--synthetic"
|
||
|
|
Include synthetic symbols in the output. These are special 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.
|
||
|
|
.IP "\fB\-\-with\-symbol\-versions\fR" 4
|
||
|
|
.IX 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 \fBfoo@VER_1\fR. 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 \fBfoo@@VER_2\fR.
|
||
|
|
.IP "\fB\-\-target=\fR\fIbfdname\fR" 4
|
||
|
|
.IX Item "--target=bfdname"
|
||
|
|
Specify an object code format other than your system's default format.
|
||
|
|
.IP "\fB@\fR\fIfile\fR" 4
|
||
|
|
.IX Item "@file"
|
||
|
|
Read command-line options from \fIfile\fR. The options read are
|
||
|
|
inserted in place of the original @\fIfile\fR option. If \fIfile\fR
|
||
|
|
does not exist, or cannot be read, then the option will be treated
|
||
|
|
literally, and not removed.
|
||
|
|
.Sp
|
||
|
|
Options in \fIfile\fR are separated by whitespace. A whitespace
|
||
|
|
character may be included in an option by surrounding the entire
|
||
|
|
option in either single or double quotes. Any character (including a
|
||
|
|
backslash) may be included by prefixing the character to be included
|
||
|
|
with a backslash. The \fIfile\fR may itself contain additional
|
||
|
|
@\fIfile\fR options; any such options will be processed recursively.
|
||
|
|
.SH "SEE ALSO"
|
||
|
|
.IX Header "SEE ALSO"
|
||
|
|
\&\fIar\fR\|(1), \fIobjdump\fR\|(1), \fIranlib\fR\|(1), and the Info entries for \fIbinutils\fR.
|
||
|
|
.SH "COPYRIGHT"
|
||
|
|
.IX Header "COPYRIGHT"
|
||
|
|
Copyright (c) 1991\-2019 Free Software Foundation, Inc.
|
||
|
|
.PP
|
||
|
|
Permission is granted to copy, distribute and/or modify this document
|
||
|
|
under the terms of the \s-1GNU\s0 Free Documentation License, Version 1.3
|
||
|
|
or any later version published by the Free Software Foundation;
|
||
|
|
with no Invariant Sections, with no Front-Cover Texts, and with no
|
||
|
|
Back-Cover Texts. A copy of the license is included in the
|
||
|
|
section entitled \*(L"\s-1GNU\s0 Free Documentation License\*(R".
|