LLVM-NM(1) LLVM LLVM-NM(1)NAME
llvm-nm - list LLVM bitcode and object file's symbol table
SYNOPSIS
llvm-nm [options] [filenames…]
DESCRIPTION
The llvm-nm utility lists the names of symbols from the LLVM bitcode
files, object files, or ar archives containing them, named on the com‐
mand line. Each symbol is listed along with some simple information
about its provenance. If no file name is specified, or - is used as a
file name, llvm-nm will process a file on its standard input stream.
llvm-nm’s default output format is the traditional BSD nm output for‐
mat. Each such output record consists of an (optional) 8-digit hexa‐
decimal 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.
Type code characters currently supported, and their meanings, are as
follows:
U
Named object is referenced but undefined in this bitcode file
C
Common (multiple definitions link together into one def)
W
Weak reference (multiple definitions link together into zero or one
definitions)
t
Local function (text) object
T
Global function (text) object
d
Local data object
D
Global data object
?
Something unrecognizable
Because LLVM bitcode files typically contain objects that are not con‐
sidered to have addresses until they are linked into an executable
image or dynamically compiled “just-in-time”, llvm-nm does not print an
address for any symbol in an LLVM bitcode file, even symbols which are
defined in the bitcode file.
OPTIONS-B (default)
Use BSD output format. Alias for –format=bsd.
-P Use POSIX.2 output format. Alias for –format=posix.
--debug-syms, -a
Show all symbols, even debugger only.
--defined-only
Print only symbols defined in this file (as opposed to symbols
which may be referenced by objects in this file, but not defined
in this file.)
--dynamic, -D
Display dynamic symbols instead of normal symbols.
--extern-only, -g
Print only symbols whose definitions are external; that is,
accessible from other files.
--format=format, -f format
Select an output format; format may be sysv, posix, or bsd. The
default is bsd.
-help Print a summary of command-line options and their meanings.
--no-sort, -p
Shows symbols in order encountered.
--numeric-sort, -n, -v
Sort symbols by address.
--print-file-name, -A, -o
Precede each symbol with the file it came from.
--print-size, -S
Show symbol size instead of address.
--size-sort
Sort symbols by size.
--undefined-only, -u
Print only symbols referenced but not defined in this file.
--radix=RADIX, -t
Specify the radix of the symbol address(es). Values accepted
d(decimal), x(hexadecomal) and o(octal).
BUGS
· llvm-nm cannot demangle C++ mangled names, like GNU nm can.
· llvm-nm does not support the full set of arguments that GNU nm
does.
EXIT STATUS
llvm-nm exits with an exit code of zero.
SEE ALSO
llvm-dis, ar(1), nm(1)AUTHOR
Maintained by The LLVM Team (http://llvm.org/).
COPYRIGHT
2003-2017, LLVM Project
4 2017-10-18 LLVM-NM(1)
