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man pages section 1: User Commands

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Updated: Thursday, June 13, 2019
 
 

size(1)

Name

size - print section sizes in bytes of object files

Synopsis

size [fFhnoVx] file...

Description

The size command produces segment or section size information in bytes for each loaded section in ELF object files. size prints the size of the text, data, and bss (uninitialized data) segments (or sections) and their total.

size processes ELF object files entered on the command line. If an archive file is input to the size command, the information for each object file in the archive is displayed.

When calculating segment information, the size command prints the total file size of the non-writable segments, the total file size of the writable segments, and the total memory size of the writable segments minus the total file size of the writable segments.

If it cannot calculate segment information, size calculates section information. When calculating section information, it prints the total size of sections that are allocatable, non-writable, and not NOBITS, the total size of the sections that are allocatable, writable, and not NOBITS, and the total size of the writable sections of type NOBITS. NOBITS sections do not actually take up space in the file.

If size cannot calculate either segment or section information, it prints an error message.

Options

The following options are supported:

–f

Prints the size of each allocatable section, the name of the section, and the total of the section sizes. If there is no section data, size prints an error message.

–F

Prints the size of each loadable segment, the permission flags of the segment, then the total of the loadable segment sizes. If there is no segment data, size prints an error message.

–h

Prints numbers in decimal, scaled to a human readable format. Scaling is done by repetitively dividing by 1024.

–n

Prints non-loadable segment or non-allocatable section sizes. If segment data exists, size prints the memory size of each loadable segment or file size of each non-loadable segment, the permission flags, and the total size of the segments. If there is no segment data, size prints, for each allocatable and non-allocatable section, the memory size, the section name, and the total size of the sections. If there is no segment or section data, size prints an error message.

–o

Prints numbers in octal, not decimal.

–V
–-version

Print version information.

–x

Prints numbers in hexadecimal, not decimal.

–?
–-help

Print usage message and immediately exit.

Examples

The examples below are typical size output.

Example 1 Producing size information
example% size filename
2724 + 88 + 0 = 2812 
Example 2 Producing allocatable section size information
example% size -f filename
26(.text) + 5(.init) + 5(.fini) = 36 
Example 3 Producing loadable segment size information
example% size -F filename
2724(r-x) + 88(rwx) + 0(rwx) = 2812

Attributes

See attributes(7) for descriptions of the following attributes:

ATTRIBUTE TYPE
ATTRIBUTE VALUE
Availability
developer/base-developer-utilities

See Also

as(1), ld(1), ar.h(3HEAD), a.out(5), attributes(7)