this is the code which i use finally. it works. thanks you guys :) 
$return{"objdump"} = join( "", $return{"objdump"} =~ /[0-9a-f]{8}/g );

my $length = length $return{"objdump"};
for( my $i = 0 ; $i < $length ; $i += 2 )
{
    print "\\x" . substr( $return{"objdump"}, $i, 2 );
}

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In reply to Re: Simple regex by Isothop
in thread Simple regex by Isothop

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