2012-06-07 07:34:10 +08:00
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llvm-nm - list LLVM bitcode and object file's symbol table
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==========================================================
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2012-05-09 00:50:35 +08:00
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SYNOPSIS
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--------
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2012-06-07 07:34:10 +08:00
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:program:`llvm-nm` [*options*] [*filenames...*]
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2012-05-09 00:50:35 +08:00
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DESCRIPTION
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-----------
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2012-06-07 07:34:10 +08:00
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The :program:`llvm-nm` utility lists the names of symbols from the LLVM bitcode
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files, object files, or :program:`ar` archives containing them, named on the
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2013-08-18 16:32:32 +08:00
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command line. Each symbol is listed along with some simple information about
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2019-06-11 21:46:52 +08:00
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its provenance. If no filename is specified, *a.out* is used as the input.
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If *-* is used as a filename, :program:`llvm-nm` will read a file from its
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standard input stream.
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2012-05-09 00:50:35 +08:00
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2012-06-07 07:34:10 +08:00
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:program:`llvm-nm`'s default output format is the traditional BSD :program:`nm`
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output format. Each such output record consists of an (optional) 8-digit
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hexadecimal address, followed by a type code character, followed by a name, for
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each symbol. One record is printed per line; fields are separated by spaces.
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When the address is omitted, it is replaced by 8 spaces.
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Type code characters currently supported, and their meanings, are as follows:
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U
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Named object is referenced but undefined in this bitcode file
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C
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Common (multiple definitions link together into one def)
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W
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Weak reference (multiple definitions link together into zero or one definitions)
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t
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Local function (text) object
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T
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Global function (text) object
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d
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Local data object
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D
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Global data object
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?
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Something unrecognizable
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Because LLVM bitcode files typically contain objects that are not considered to
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have addresses until they are linked into an executable image or dynamically
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2012-06-07 07:34:10 +08:00
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compiled "just-in-time", :program:`llvm-nm` does not print an address for any
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symbol in an LLVM bitcode file, even symbols which are defined in the bitcode
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file.
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OPTIONS
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-------
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2012-06-07 07:34:10 +08:00
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.. program:: llvm-nm
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2012-05-09 00:50:35 +08:00
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2012-06-07 07:34:10 +08:00
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.. option:: -B (default)
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2012-05-09 00:50:35 +08:00
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[docs] Fixing Sphinx warnings to unclog the buildbot
Lots of blocks had "llvm" or "nasm" syntax types but either weren't following
the syntax, or the syntax has changed (and sphinx hasn't keep up) or the type
doesn't even exist (nasm?).
Other documents had :options: what were invalid. I only removed those that had
warnings, and left the ones that didn't, in order to follow the principle of
least surprise.
This is like this for ages, but the buildbot is now failing on errors. It may
take a while to upgrade the buildbot's sphinx, if that's even possible, but
that shouldn't stop us from getting docs updates (which seem down for quite
a while).
Also, we're not losing any syntax highlight, since when it doesn't parse, it
doesn't colour. Ie. those blocks are not being highlighted anyway.
I'm trying to get all docs in one go, so that it's easy to revert later if we
do fix, or at least easy to know what's to fix.
llvm-svn: 276109
2016-07-20 20:16:38 +08:00
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Use BSD output format. Alias for `--format=bsd`.
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2012-05-09 00:50:35 +08:00
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2012-06-07 07:34:10 +08:00
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.. option:: -P
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2012-05-09 00:50:35 +08:00
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[docs] Fixing Sphinx warnings to unclog the buildbot
Lots of blocks had "llvm" or "nasm" syntax types but either weren't following
the syntax, or the syntax has changed (and sphinx hasn't keep up) or the type
doesn't even exist (nasm?).
Other documents had :options: what were invalid. I only removed those that had
warnings, and left the ones that didn't, in order to follow the principle of
least surprise.
This is like this for ages, but the buildbot is now failing on errors. It may
take a while to upgrade the buildbot's sphinx, if that's even possible, but
that shouldn't stop us from getting docs updates (which seem down for quite
a while).
Also, we're not losing any syntax highlight, since when it doesn't parse, it
doesn't colour. Ie. those blocks are not being highlighted anyway.
I'm trying to get all docs in one go, so that it's easy to revert later if we
do fix, or at least easy to know what's to fix.
llvm-svn: 276109
2016-07-20 20:16:38 +08:00
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Use POSIX.2 output format. Alias for `--format=posix`.
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2012-05-09 00:50:35 +08:00
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2012-06-07 07:34:10 +08:00
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.. option:: --debug-syms, -a
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2012-05-09 00:50:35 +08:00
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2012-06-07 07:34:10 +08:00
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Show all symbols, even debugger only.
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2012-05-09 00:50:35 +08:00
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2012-06-07 07:34:10 +08:00
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.. option:: --defined-only
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2012-06-07 07:34:10 +08:00
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Print only symbols defined in this file (as opposed to
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symbols which may be referenced by objects in this file, but not
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defined in this file.)
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2012-06-07 07:34:10 +08:00
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.. option:: --dynamic, -D
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2012-05-09 00:50:35 +08:00
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2012-06-07 07:34:10 +08:00
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Display dynamic symbols instead of normal symbols.
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.. option:: --extern-only, -g
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Print only symbols whose definitions are external; that is, accessible
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from other files.
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2018-07-03 01:24:37 +08:00
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.. option:: --no-weak, -W
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Don't print any weak symbols in the output.
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2012-06-07 07:34:10 +08:00
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.. option:: --format=format, -f format
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2019-06-11 23:58:10 +08:00
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Select an output format; *format* may be *sysv*, *posix*, *darwin*, or *bsd*.
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The default is *bsd*.
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2012-06-07 07:34:10 +08:00
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2019-06-11 22:55:31 +08:00
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.. option:: --help, -h
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Print a summary of command-line options and their meanings.
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2012-06-07 07:34:10 +08:00
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.. option:: --no-sort, -p
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2012-06-07 07:34:10 +08:00
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Shows symbols in order encountered.
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2012-05-09 00:50:35 +08:00
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2012-06-07 07:34:10 +08:00
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.. option:: --numeric-sort, -n, -v
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2012-06-07 07:34:10 +08:00
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Sort symbols by address.
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2012-06-07 07:34:10 +08:00
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.. option:: --print-file-name, -A, -o
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2012-06-07 07:34:10 +08:00
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Precede each symbol with the file it came from.
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.. option:: --print-size, -S
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2019-06-12 18:44:41 +08:00
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Show symbol size as well as address (not applicable for Mach-O).
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2012-06-07 07:34:10 +08:00
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.. option:: --size-sort
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Sort symbols by size.
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.. option:: --undefined-only, -u
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Print only symbols referenced but not defined in this file.
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2016-02-11 01:51:39 +08:00
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.. option:: --radix=RADIX, -t
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Specify the radix of the symbol address(es). Values accepted d(decimal),
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x(hexadecimal) and o(octal).
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2012-05-09 00:50:35 +08:00
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BUGS
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----
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2012-06-07 07:34:10 +08:00
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* :program:`llvm-nm` does not support the full set of arguments that GNU
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:program:`nm` does.
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2012-05-09 00:50:35 +08:00
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EXIT STATUS
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-----------
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2012-06-07 07:34:10 +08:00
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:program:`llvm-nm` exits with an exit code of zero.
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2012-05-09 00:50:35 +08:00
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SEE ALSO
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--------
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2013-08-18 16:32:32 +08:00
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llvm-dis, ar(1), nm(1)
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