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UNIX in a Nutshell: System V Edition

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UNIX Commands
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nm

nm [options] objfiles

Print the symbol table (name list) in alphabetical order for one or more object files (usually ELF or COFF files). Output includes each symbol's value, type, size, name, etc. A key letter categorizing the symbol can also be displayed. Output includes each symbol's value and name, preceded by a key letter categorizing the symbol. If no object file is given, use a.out.

Options

-e

Report only external and static symbols; obsolete.

-f

Report all information; obsolete.

-h

Suppress the header.

-l

Use with -p; indicate WEAK symbols by appending an asterisk (*) to key letters.

-n

Sort the external symbols by name.

-o

Report values in octal.

-p

Precede each symbol with its key letter (used for parsing).

-r

Report the object file's name on each line.

-T

Truncate the symbol name in the display; obsolete.

-u

Report only the undefined symbols.

-v

Sort the external symbols by value.

-V

Print nm's version number on standard error.

-x

Report values in hexadecimal.

Key letters

A

Absolute symbol.

C

Common symbol.

D

Data object symbol.

F

File symbol.

N

Symbol with no type.

S

Section symbol.

T

Text symbol.

U

Undefined symbol.


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