man/man1/size.1

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 SIZE 1 "Aug 24, 2009"
 NAME
size - print section sizes in bytes of object files
 SYNOPSIS

size [-f] [-F] [-n] [-o] [-V] [-x] filename...


 DESCRIPTION

The size command produces segment or section size information in bytes
for each loaded section in ELF object files. size prints out 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 out 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 out 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 filename.

If size cannot calculate either segment or section information, it
prints an error message and stops processing the file.
 OPTIONS

The following options are supported:
-f

Prints out 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
out an error message and stops processing the file.


-F

Prints out 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 and stops processing the file.


-n

Prints out non-loadable segment or non-allocatable section sizes. If segment
data exists, size prints out 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 out, 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 and stops processing.


-o

Prints numbers in octal, not decimal.


-V

Prints the version information for the size command on the standard error
output.


-x

Prints numbers in hexadecimal, not decimal.


 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 ... (If statically linked)


 SEE ALSO

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

Since the size of bss sections is not known until link-edit time, the
size command will not give the true total size of pre-linked objects.