svn commit: r285539 - head/sys/compat/cloudabi64

[Jilles Tjoelker]

On Tue, Jul 14, 2015 at 02:33:21PM +0000, Ed Schouten wrote:
> Author: ed
> Date: Tue Jul 14 14:33:21 2015
> New Revision: 285539
> URL: https://svnweb.freebsd.org/changeset/base/285539

> Log:
>   Implement {,p}{read,write}{,v}().

>   Add a routine similar to copyinuio() and freebsd32_copyinuio() that
>   copies in CloudABI's struct iovecs. These are then translated into
>   FreeBSD format and placed in a 'struct uio', so we can call into the
>   kern_*() functions.

> [snip]
> +	if (iovcnt > UIO_MAXIOV)
> +		return (EINVAL);

The maximum number of iovecs is part of the ABI and should therefore
probably have a CLOUDABI_* constant.

It turns out that both FreeBSD and Linux report 1024 for getconf
IOV_MAX, so there is little practical effect.

-- 
Jilles Tjoelker