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155 lines
2.5 KiB
ReStructuredText
155 lines
2.5 KiB
ReStructuredText
llvm-nm - list LLVM bitcode file's symbol table
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===============================================
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SYNOPSIS
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--------
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**llvm-nm** [*options*] [*filenames...*]
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DESCRIPTION
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-----------
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The **llvm-nm** utility lists the names of symbols from the LLVM bitcode files,
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or **ar** archives containing LLVM bitcode 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 file name is specified, or *-* is used as a file name, **llvm-nm** will
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process a bitcode file on its standard input stream.
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**llvm-nm**'s default output format is the traditional BSD **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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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", **llvm-nm** does not print an address for any symbol,
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even symbols which are defined in the bitcode file.
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OPTIONS
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-------
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**-P**
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Use POSIX.2 output format. Alias for **--format=posix**.
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**-B** (default)
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Use BSD output format. Alias for **--format=bsd**.
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**-help**
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Print a summary of command-line options and their meanings.
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**--defined-only**
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Print only symbols defined in this bitcode 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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**--extern-only**, **-g**
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Print only symbols whose definitions are external; that is, accessible
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from other bitcode files.
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**--undefined-only**, **-u**
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Print only symbols referenced but not defined in this bitcode file.
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Select an output format; *fmt* may be *sysv*, *posix*, or *bsd*. The
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default is *bsd*.
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BUGS
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----
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**llvm-nm** cannot demangle C++ mangled names, like GNU **nm** can.
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EXIT STATUS
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-----------
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**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|llvm-dis, ar(1), nm(1)
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