Get all entries for WordPress attachments on attachment archive page

functions.php

<?php
add_filter( 'register_post_type_args', 'tp_change_attachment_post_type_args', 10, 2 );
function tp_change_attachment_post_type_args($args, $post_type){
	if( 'attachment' == $post_type ){
		$args['has_archive']  = true;
		$args['rewrite']      = array( 'slug' => 'media' );
	}

	return $args;
}


add_action( 'pre_get_posts', 'tp_get_all_posts_attachment' );
function tp_get_all_posts_attachment( $query ) {
	if( !is_admin() && is_post_type_archive('attachment') && 'attachment' == $query->get('post_type') )
	{
		$query->set( 'posts_per_page', -1 );
	}
}