NAME¶
llvm-nm - list LLVM bitcode file's symbol table
SYNOPSIS¶
llvm-nm [
options] [
filenames...]
DESCRIPTION¶
The
llvm-nm utility lists the names of symbols from the LLVM bitcode
files, or
ar archives containing LLVM 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
- is used as a file
name,
llvm-nm will process a bitcode 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 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 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 bitcode file.
OPTIONS¶
- -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 bitcode 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 bitcode files.
- --undefined-only, -u
- Print only symbols referenced but not defined in this
bitcode file.
- --format=fmt, -f
- Select an output format; fmt may be sysv,
posix, or bsd. The default is bsd.
BUGS¶
llvm-nm cannot demangle C++ mangled names, like GNU
nm can.
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/>).