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1320ae98e2
Summary: This adds a new -no-weak flag to nm to hide weak symbols in its output. This also adds a -W alias for this which is analogous to -U. Patch by Keith Smiley Reviewers: kastiglione, enderby, compnerd Reviewed By: kastiglione Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D48751 llvm-svn: 336126
153 lines
3.4 KiB
ReStructuredText
153 lines
3.4 KiB
ReStructuredText
llvm-nm - list LLVM bitcode and object file's symbol table
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==========================================================
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SYNOPSIS
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--------
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:program:`llvm-nm` [*options*] [*filenames...*]
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DESCRIPTION
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-----------
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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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command line. Each symbol is listed along with some simple information about
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its provenance. If no file name is specified, or *-* is used as a file name,
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:program:`llvm-nm` will process a file on its standard input stream.
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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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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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.. program:: llvm-nm
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.. option:: -B (default)
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Use BSD output format. Alias for `--format=bsd`.
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.. option:: -P
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Use POSIX.2 output format. Alias for `--format=posix`.
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.. option:: --debug-syms, -a
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Show all symbols, even debugger only.
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.. option:: --defined-only
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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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.. option:: --dynamic, -D
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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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.. option:: --no-weak, -W
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Don't print any weak symbols in the output.
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.. option:: --format=format, -f format
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Select an output format; *format* may be *sysv*, *posix*, or *bsd*. The default
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is *bsd*.
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.. option:: -help
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Print a summary of command-line options and their meanings.
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.. option:: --no-sort, -p
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Shows symbols in order encountered.
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.. option:: --numeric-sort, -n, -v
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Sort symbols by address.
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.. option:: --print-file-name, -A, -o
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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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Show symbol size instead of address.
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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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.. 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(hexadecomal) and o(octal).
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BUGS
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----
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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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EXIT STATUS
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-----------
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:program:`llvm-nm` exits with an exit code of zero.
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SEE ALSO
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--------
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llvm-dis, ar(1), nm(1)
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