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123 lines
2.6 KiB
Plaintext
123 lines
2.6 KiB
Plaintext
=pod
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=head1 NAME
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llvm-nm - list LLVM bytecode file's symbol table
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=head1 SYNOPSIS
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B<llvm-nm> [I<options>] [I<filenames...>]
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=head1 DESCRIPTION
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The B<llvm-nm> utility lists the names of symbols from the LLVM bytecode files,
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or B<ar> archives containing LLVM bytecode files, named on the command line.
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Each symbol is listed along with some simple information about its provenance.
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If no filename is specified, or I<-> is used as a filename, B<llvm-nm> will
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process a bytecode file on its standard input stream.
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B<llvm-nm>'s default output format is the traditional BSD B<nm> output format.
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Each such output record consists of an (optional) 8-digit hexadecimal address,
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followed by a type code character, followed by a name, for each symbol. One
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record is printed per line; fields are separated by spaces. When the address is
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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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=over
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=item U
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Named object is referenced but undefined in this bytecode file
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=item C
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Common (multiple defs link together into one def)
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=item W
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Weak reference (multiple defs link together into zero or one defs)
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=item t
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Local function (text) object
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=item T
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Global function (text) object
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=item d
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Local data object
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=item D
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Global data object
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=item ?
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Something unrecognizable
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=back
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Because LLVM bytecode 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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compiled "just-in-time", B<llvm-nm> does not print an address for any symbol,
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even symbols which are defined in the bytecode file.
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=head1 OPTIONS
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=over
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=item B<-P>
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Use POSIX.2 output format. Alias for B<--format=posix>.
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=item B<-B> (default)
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Use BSD output format. Alias for B<--format=bsd>.
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=item B<--help>
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Print a summary of command-line options and their meanings.
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=item B<--defined-only>
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Print only symbols defined in this bytecode 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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=item B<--extern-only>, B<-g>
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Print only symbols whose definitions are external; that is, accessible
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from other bytecode files.
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=item B<--undefined-only>, B<-u>
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Print only symbols referenced but not defined in this bytecode file.
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=item B<--format=>I<fmt>, B<-f>
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Select an output format; I<fmt> may be I<sysv>, I<posix>, or I<bsd>. The
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default is I<bsd>.
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=back
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=head1 BUGS
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B<llvm-nm> cannot demangle C++ mangled names, like GNU B<nm> can.
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=head1 EXIT STATUS
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B<llvm-nm> exits with an exit code of zero.
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=head1 SEE ALSO
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L<llvm-dis|llvm-dis>, ar(1), nm(1)
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=head1 AUTHOR
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Maintained by the LLVM Team (L<http://llvm.org>).
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=cut
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