nm man page on OpenDarwin

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NM(1)									 NM(1)

NAME
       nm - display name list (symbol table)

SYNOPSIS
       nm [ -agnoprumxjlf [ s segname sectname ]] [ file ... ]

DESCRIPTION
       Nm  displays  the  name	list (symbol table) of each object file in the
       argument list.  If an argument is an archive, a listing for each object
       file  in	 the  archive  will  be	 produced.   File  can	be of the form
       libx.a(x.o), in which case only symbols from that member of the	object
       file  are  listed.   (The  parentheses  have to be quoted to get by the
       shell.)	If no file is given, the symbols in a.out are listed.

       Each symbol name is  preceded  by  its  value  (blanks  if  undefined).
       Unless the -m option is specified, this value is followed by one of the
       following characters, representing the symbol type:  U  (undefined),  A
       (absolute),  T  (text  section symbol), D (data section symbol), B (bss
       section symbol), C  (common  symbol),  -	 (for  debugger	 symbol	 table
       entries; see -a below), S (symbol in a section other than those above),
       or I (indirect symbol).	If the symbol  is  local  (non-external),  the
       symbol's	 type  is  instead  represented by the corresponding lowercase
       letter.	A lower case u in a dynamic shared library indicates  a	 unde‐
       fined  reference	 to  a	private external in another module in the same
       library.

       If  the	symbol	is  a  Objective  C  method,  the   symbol   name   is
       ±[Class_name(category_name) method:name:], where `+' is for class meth‐
       ods, `-' is for instance methods, and (category_name) is	 present  only
       when the method is in a category.

       The output is sorted alphabetically by default.

       Options are:

       -a     Display  all  symbol table entries, including those inserted for
	      use by debuggers.

       -g     Display only global (external) symbols.

       -n     Sort numerically rather than alphabetically.

       -o     Prepend file or archive element name to each output line, rather
	      than only once.

       -p     Don't sort; display in symbol-table order.

       -r     Sort in reverse order.

       -u     Display only undefined symbols.

       -m     Display  the  N_SECT  type  symbols  (Mach-O  symbols)  as (seg‐
	      ment_name, section_name) followed by  either  external  or  non-
	      external	and then the symbol name.  Undefined, common, absolute
	      and indirect symbols get	displayed  as  (undefined),  (common),
	      (absolute), and (indirect), respectively.

       -x     Display  the  symbol  table entry's fields in hexadecimal, along
	      with the name as a string.

       -j     Just display the symbol names (no value or type).

       -s segname sectname
	      List only those symbols in the section (segname,sectname).

       -l     List a pseudo symbol .section_start if  no  symbol  has  as  its
	      value  the  starting address of the section.  (This is used with
	      the -s option above.)

       -arch arch_type
	      Specifies the architecture, arch_type, of the file for nm(1)  to
	      operate on when the file is a fat file (see arch(3) for the cur‐
	      rently known arch_types).	 The arch_type can be "all" to operate
	      on all architectures in the file.	 The default is to display the
	      symbols from only the host architecture, if  the	file  contains
	      it;  otherwise,  symbols	for  all architectures in the file are
	      displayed.

       -f     Display the symbol table of a dynamic library flat (as one  file
	      not separate modules).

SEE ALSO
       ar(1), ar(5), Mach-O(5), stab(5), nlist(3)

BUGS
       Displaying Mach-O symbols with -m is too verbose.  Without the -m, sym‐
       bols in the Objective C sections get displayed as an `s'.

Apple Computer, Inc.	       October 23, 1997				 NM(1)
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