llvm-nm - list LLVM bytecode file's symbol table

llvm-nm [options] [filenames...]

The llvm-nm utility lists the names of symbols from the LLVM bytecode files, or ar archives containing LLVM bytecode files, named on the command line. Each symbol is listed along with some simple information about its provenance. If no filename is specified, or - is used as a filename, llvm-nm will process a bytecode file on its standard input stream.

llvm-nm's default output format is the traditional BSD nm 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.

Type code characters currently supported, and their meanings, are as follows:

U

Named object is referenced but undefined in this bytecode file

C

Common (multiple defs link together into one def)

W

Weak reference (multiple defs link together into zero or one defs)

t

Local function (text) object

T

Global function (text) object

d

Local data object

D

Global data object

?

Something unrecognizable

Because LLVM bytecode files typically contain objects that are not considered 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, even symbols which are defined in the bytecode file.

-P

Use POSIX.2 output format. Alias for --format=posix.

-B (default)

Use BSD output format. Alias for --format=bsd.

--help

Print a summary of command-line options and their meanings.

--defined-only

Print only symbols defined in this bytecode file (as opposed to symbols which may be referenced by objects in this file, but not defined in this file.)

--extern-only, -g

Print only symbols whose definitions are external; that is, accessible from other bytecode files.

--undefined-only, -u

Print only symbols referenced but not defined in this bytecode file.

--format=fmt, -f

Select an output format; fmt may be sysv, posix, or bsd. The default is bsd.

llvm-nm cannot demangle mangled names, like GNU nm can.

llvm-nm exits with an exit code of zero.

llvm-dis, ar(1), nm(1)

Maintained by the LLVM Team (<http://llvm.cs.uiuc.edu>).