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.\" $FreeBSD$
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.\" ========================================================================
.\"
.IX Title "LLVM-NM 1"
.TH LLVM-NM 1 "2012-04-05" "LLVM 3.1" "LLVM Command Guide"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
llvm\-nm \- list LLVM bitcode file's symbol table
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
\&\fBllvm-nm\fR [\fIoptions\fR] [\fIfilenames...\fR]
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The \fBllvm-nm\fR utility lists the names of symbols from the \s-1LLVM\s0 bitcode files,
or \fBar\fR archives containing \s-1LLVM\s0 bitcode files, named on the command line.
Each symbol is listed along with some simple information about its provenance.
If no file name is specified, or \fI\-\fR is used as a file name, \fBllvm-nm\fR will
process a bitcode file on its standard input stream.
.PP
\&\fBllvm-nm\fR's default output format is the traditional \s-1BSD\s0 \fBnm\fR output format.
Each such output record consists of an (optional) 8\-digit hexadecimal address,
followed by a type code character, followed by a name, for each symbol. One
record is printed per line; fields are separated by spaces. When the address is
omitted, it is replaced by 8 spaces.
.PP
Type code characters currently supported, and their meanings, are as follows:
.IP "U" 4
.IX Item "U"
Named object is referenced but undefined in this bitcode file
.IP "C" 4
.IX Item "C"
Common (multiple definitions link together into one def)
.IP "W" 4
.IX Item "W"
Weak reference (multiple definitions link together into zero or one definitions)
.IP "t" 4
.IX Item "t"
Local function (text) object
.IP "T" 4
.IX Item "T"
Global function (text) object
.IP "d" 4
.IX Item "d"
Local data object
.IP "D" 4
.IX Item "D"
Global data object
.IP "?" 4
Something unrecognizable
.PP
Because \s-1LLVM\s0 bitcode files typically contain objects that are not considered to
have addresses until they are linked into an executable image or dynamically
compiled \*(L"just-in-time\*(R", \fBllvm-nm\fR does not print an address for any symbol,
even symbols which are defined in the bitcode file.
.SH "OPTIONS"
.IX Header "OPTIONS"
.IP "\fB\-P\fR" 4
.IX Item "-P"
Use \s-1POSIX\s0.2 output format. Alias for \fB\-\-format=posix\fR.
.IP "\fB\-B\fR (default)" 4
.IX Item "-B (default)"
Use \s-1BSD\s0 output format. Alias for \fB\-\-format=bsd\fR.
.IP "\fB\-help\fR" 4
.IX Item "-help"
Print a summary of command-line options and their meanings.
.IP "\fB\-\-defined\-only\fR" 4
.IX Item "--defined-only"
Print only symbols defined in this bitcode file (as opposed to
symbols which may be referenced by objects in this file, but not
defined in this file.)
.IP "\fB\-\-extern\-only\fR, \fB\-g\fR" 4
.IX Item "--extern-only, -g"
Print only symbols whose definitions are external; that is, accessible
from other bitcode files.
.IP "\fB\-\-undefined\-only\fR, \fB\-u\fR" 4
.IX Item "--undefined-only, -u"
Print only symbols referenced but not defined in this bitcode file.
.IP "\fB\-\-format=\fR\fIfmt\fR, \fB\-f\fR" 4
.IX Item "--format=fmt, -f"
Select an output format; \fIfmt\fR may be \fIsysv\fR, \fIposix\fR, or \fIbsd\fR. The
default is \fIbsd\fR.
.SH "BUGS"
.IX Header "BUGS"
\&\fBllvm-nm\fR cannot demangle \*(C+ mangled names, like \s-1GNU\s0 \fBnm\fR can.
.SH "EXIT STATUS"
.IX Header "EXIT STATUS"
\&\fBllvm-nm\fR exits with an exit code of zero.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
llvm-dis, \fIar\fR\|(1), \fInm\fR\|(1)
.SH "AUTHOR"
.IX Header "AUTHOR"
Maintained by the \s-1LLVM\s0 Team (<http://llvm.org/>).
|
