Nginx - wordpress in a subdirectory, what data should be passed?

I've tried so many different things. The point I'm at right now is this:

location ^~ /wordpress {
    alias /var/www/example.com/wordpress;
    index index.php index.html index.htm;
    try_files $uri $uri/ /wordpress/index.php;

    location ~ \.php$ {
        include fastcgi_params;
        fastcgi_pass 127.0.0.1:9000;
        fastcgi_split_path_info ^(/wordpress)(/.*)$;
        fastcgi_param SCRIPT_FILENAME /var/www/example.com/wordpress/index.php;
        fastcgi_param PATH_INFO $fastcgi_path_info;
    }
}

Right now, all resources as far as I can tell (images, etc) are loading correctly. And http://www.example.com/wordpress loads wordpress, but a page that says "page not found". (Wordpress is in use for this though). If I try any post urls I get the same result, "page not found". So I know the problem is that wordpress isn't obtaining the data about the path or something. Another potential problem is that if I run example.com/wp-admin.php then it will still run index.php.

What data needs to be passed? What may be going wrong here?